Advanced Barrier Film Production Equipment

Five-layer Co-extrusion Blow Film Machine

Our 5-layer co-extrusion blown film machines can satisfy most film production applications in the industry, and can be used to produce symmetric barrier films and asymmetric barrier films. Applications include: oil packaging, milk bags, vacuum packaging of solid containers, etc.

Forced feeding main machine: All main machines of PLASTAR adopt dual-alloy forced-feeding screws that feature excellent hardness and wear resistance. It can still plasticize a large number of particles under the environment of high speed and high pressure. The service life can reach 3-5 times of ordinary screws.

Plane stacking mold: The five-layer co-extrusion blown film machine production line uses the most advanced five-layer plane stacking mold. We optimize the layout by virtue of thermofluidics and observe the fluid condition with the help of 3D simulation software. We are sure that after a high degree of polishing and coating, each runner has the ability to clean itself under the high pressure and high speed scouring of PLASTAR’s high-speed screws. It will reduce waste in the particle replacement process and shorten the downtime of maintenance.

Advanced automation module: The production line of five-layer co-extrusion blown film machines has advanced automation functions, such as centralized feeding, batching, weight control, IBC internal cooling, automatic thickness control, and automatic central winding. All functions are integrated on the touch screen, thus simplifying operations and increasing productivity.

Five-layer Co-extrusion Blow Film Machine
Model SJ-5L1500
Suitable Material HDPE, LDPE, LLDPE, EVA, Nylon etc.
Film Width 1500 mm
Film Thickness 0.03 - 0.2 mm
Max. Output 300kg / h
Extruder
Screw Diameter 55mm * 4 / 60mm * 1
Screw L/D 30:1
Barrel Cooling Water Cooling
Main Motor Power 30kw * 4; 37kw * 1
Total Power 200kw
Die Head
Die Head Type Five layers with inner cooling device
Air Ring Double lips air ring
Traction Roller Width 1700 mm
Effective Width 1500 mm
Traction Speed 45m / min
Winding Unit
Wingding Type Friction type automatic single / double winder
Wingding Speed 5 - 45m / min
Voltage 380V, 50Hz
Dimension About 10 * 6.0 * 12.5 m
Weight About 16 T

Mixing Machine

200kg Mixing Machine

Automatic Air Ring

Leftover Material Recovery Machine

Four-component Feeder

Loss-in-weight Feeder

Corona Treatment Rack

Manipulator

Automatic Thickness Measurement Device

Cold Water B

Suction Machine

Hydraulic Screen Exchanger

FAQ
  • A1.

    The 7, 9, and 11 blown film lines have several benefits over 3 and 5 layers blown film lines. First, with more layers, you can be creative with your production.

    They offer a wide range of materials to choose from that will be in the different layers. 

    With the 7 layers blown film line, you can cut the cost of production compared to 3 and 5 blown film lines.

    It also has improved barrier or strength properties and toughness to produce different materials. 

    The 9 layers have a semi-rigid barrier structure, and its skin layers can be split into two to optimize performance and cost of production. 

    11 layers blown film line has an even higher barrier structure, and it can help you cut the cost of producing a particular application. 

    It has the flexibility to optimize barrier, rigidity, thermoformability, cost, and heat seal properties. 

  • A2.

    7/9/11 layers blown film lines are most suitable for applications like mLLDPE, LLDPE, Tie Layer, EVOH, Tie Layer, LLDPE, mLLDPE, for the 7 layer blown film lines in that particular order, that is for cost reduction over the 5 layers blown extrusion line. 

    For high barrier lidding structure, the applications most suitable are LLDPE, Tie Layer, Nylon, EVOH, Nylon, Tie Layer, and LLDPE. 

    For thermoformable cheese tray, the application most suitable for the 7 layers blown film line is LLDPE, Tie Layer, Nylon, EVOH, Nylon, Tie Layer, EVA. 

    While for the 9 layers blown film line rigid, high barrier structure using cost or performance-optimized PE resins, the applications most suitable for it are LLDPE, LDPE, Tie Layer, Nylon, EVOH, Nylon, Tie Layer, LDPE, and LLDPE. 

    For 11 layer blown film lines, retortable, high barrier structure cost or performance optimized PP and copolyer PP resins, the most suitable application are coPP, PP, PP, Tie Layer, Nylon, EVOH, Nylon, Tie Layer, PP, PP, and coPP. 

    The more layer a blown film line has, the more package design options you have.

  • A3.

    7 layers blown film lines are blown film lines used to produce a majority of the industry's packaging. 

    It meets almost all the packaging needs across different industries. 

    It can be used to produce asymmetric and symmetric films, including complex packaging solutions as well as barrier films. 

    It has a cylindrical spiral die (CSD), which is self-cleaning.  

    It has different configuration features that you can tweak to suit your purpose and also based on the film that you want to use. 

    They have advanced automation features like integrated material conveying, gsm control, gravimetric blending and dosing, non-contact type IBC system with digital correction, automatic thickness control (with a non-contact capacitive sensor or gamma backscatter nuclear sensor), fully automatic center-gap-surface winder, and integrated process control. 

    They can be used to produce different films for different packaging like meat packaging, edible oil packaging, vacuum packaging, etc.

  • A4.

    Nine layers blown film line process is a multilayer film production that improves flexibility and can help the processor save raw material cost. 

    With the right mix of products, a nine-layer blown film line can save material and help you acquire your upfront capital cost. 

    It can also help in gauging your production film, and due to the fact that it has many layers, the mechanical properties of the materials can be improved, resulting in you not needing so much material. 

    Nine layers blown film line also has low-temperature screws and combined heating and cooling zones, which helps in processing the polyolefins and other barrier materials like EVOH in the same extruder. 

    It also has various lines with different film winders that operate either clockwise or counterclockwise winding, automation systems, and winding shaft handling systems.

  • A5.

    3-layer co-extrusion plastic blown film lines are a type of blown film line used in the production of plastic filaments in making a wide range of product varieties. 

    It has different parts that work together in producing quality outputs. 

    It has an extruder that provides high melt quality under different temperatures while still maintaining an excellent output. 

    The dies of a 3-layer co-extrusion plastic blown film line are designed to produce a uniform thickness of the product and high production quality.

    It usually has a high-performance motor with an AC inverter drive that allows you to produce your products easily while saving energy and minimizing maintenance. 

    It has a high lubrication system that helps to minimize the downtime of the blown film line.

     The die heads of a 3-layer co-extrusion blown film machine are usually in three layers, and they all have inner cooling devices, while the air rings are double-lip air rings.

    They have many features depending on their types and makers because there is a variety of 3-layer co-extrusion plastic blown film lines under different makers.   

  • A6.

    Stretch hood three-layer blown film lines are blown film lines used in producing a wide range of materials ranging from packaging materials, paper, etc. 

    This blown film line has many features that like excellent melting homogeneity, smooth bore extruders, triple lip air ring, which provides the blown film line with a cooling rate, easily exchangeable die, etc. 

    You can configure this blown film line whichever way you want to produce the perfect product. 

    You can configure the material handling, extrusion, die, and air ring, tower equipment, winding, control system, optional services. 

     The three layers are low stretch, medium stretch, and high stretch. 

    The low stretch is below 35%, while the medium stretch is between 35% to 75%, and the high stretch is 75% and above. 

  • A7.

    The materials used for express envelop bags are the materials you can use with the ABA three-layer blown film lines and the ABC three-layer blown film line. 

    The material used in these blown film lines is HDPE, LDPE virgin raw material, recycled material, CaCO3 compound, biodegradable material, master starch, additive, mLLDPE, PP, EVA, LLDPE, etc. 

    If you want to produce quality express envelop bags, you have a range of material options to choose from. 

    18. What are barrier blown film lines?

    Barrier blown film lines is a blown film line that is used to produce high-quality barrier films. 

    This blown film line is in many layers, and it is designed and made with the latest technology, quality material, and great workmanship. 

    It is a very versatile blown film line and can produce a wide range of quality products using quality materials and resins. 

    You can configure the layers of the barrier blown film line to produce any quality product you like. 

    It has an extrusion die and air ring technology that ensures that your films are exceptionally flat and free of gels. 

    Barrier blown film lines have varieties of configurations that you can tweak to provide the winding resource needed to create the best roll quality for the application. 

    You can use it to produce food packaging, medical films, lamination or converting films, etc. 

  • A8.

    The blown film line that is used for PE/PA co-extrusion film is the five-layer co-extrusion blown film line. 

    This blown film line can be used to produce a variety of film packaging across different industries. 

    This blown film line has an excellent hardness feature, and it is highly wear-resistant. 

    It can produce a lot of films consequently without fail at a very high speed and high pressure. 

    The forced-feeding screw of this blown film line has a service life that is 3 to 5 times higher than an ordinary screw. 

    It has an advanced plane stacking mold that produces a high degree of polishing and coating of your materials, and it has the capability of cleaning itself after producing your material, with reduced wastage of material. 

    This lessens the downtime it has when a particle in it is being replaced or when the blown film line is being maintained. 

    Whether you want to produce PE/PA co-extrusion film or another packaging film, the five-layer co-extrusion blown film line will do the work while you don't have to worry about whether you will get a quality product because you will.

  • A9.

    The PE shrink film can be produced with more than one blown film line, and you can try either of them. 

    The two blown film lines that you can use to produce PE shrink film are the ABA three-layer co-extrusion blown film line and the ABC three-layer co-extrusion blown film line. 

    The ABA three-layer co-extrusion blown film line is very flexible and can save your organization some production cost and conserve energy. 

    You can recycle materials for repeated production with this blown film line and save cost. 

    It also has a wear resistance, which gives you a competitive advantage, and at the same time, it helps you reduce cost, consumption, energy and save the number of main machines. 

    The ABC three-layer co-extrusion blown film line is a general-purpose blown film line, and it can be used to produce different packaging films, including PE shrink film and another heavy packaging film. 

    Either of the blown film lines works for the purpose you want to use it for, and it will produce the PE shrink film you have in mind effortlessly. 

    Whichever one you go for, you can rest assured that you will get your desired result without defects.

  • A10.

    The recommended blown film line for medical packaging firm is the five-layer co-extrusion blown film line. 

    The five-layer co-extrusion blown film line can be used to produce different products across different fields, and the medical field isn't left out. 

    It can be used to produce symmetric barrier film and asymmetric barrier film. 

    Therefore, if you want to produce any different medical packaging firm, your go-to blown film line is the five-layer co-extrusion blown film line. 

    You can make different packaging firms like medical mask packaging bags, outer packaging injection bags, medical mask packaging bags, disposable PE examination gloves, medical packaging bags, drip bags, and other packaging bags for different medical packages. 

    Although there are other blown film lines that can produce some of these medical packages, the five-layer co-extrusion blown film line can produce any medical packaging you want. 

    All you have to do is select the raw materials and produce any medical packaging accessories you want. 

    The five-layer co-extrusion blown film line is a good blown film line to use in producing all your medical packaging firms. 

    It is equipped with the necessary features needed to produce a variety of medical packaging firms.  

  • A11.

    The IBC (Internal Bubble Cooling) multilayer blown film lines are majorly produced to replace traditional die heads, and they also help in solving problems of leakage occurring from the die head.

    There is also a cold and hot air exchange system. This is designed in such a way that during operation, the cold wind usually blows on one side of it while the other side exhales hot air. 

    The upper traction is majorly designed to make the blown film lines thicker and more transparent. Also, the speed of production is faster in such a way that they produce three times faster and better than traditional machines.

    Thus far, blown film lines have been the fastest and widest multilayer co-extrusion rotary blown film machine in China because it has made successful innovation in upper traction.

    Below are some of the available blown film lines products

    Five-layer blown film lines, ABA Three-layer Co-extrusion blown film lines, Single-layer blown film lines, Mini blown film lines, ABC Three-layer Co-extrusion blown film line, AB Two-layer Co-extrusion blown film line, etc

  • A12.

    If you do thorough research, you will discover that about thirty percent of food across the globe gets to become waste as a result of lack of proper packaging. 

    Scientists have come to the conclusion that the population of the world is likely to reach a number of ten billion and when this is obtained, and even before then, provision should have been made for proper packaging of foods during the period of transporting them from one part of the world to the other so as to avoid loss.

    Furthermore, as the industry grows, the packaging of food has been on the increase, and a great deal is applied to extending its longevity. 

    That is why blown film lines have been chosen over every other machine across the world to be used for flexible packaging of the food. 

    Blown film lines are generally accepted and chosen over other products by the global market because it is a technology-based enterprise that specializes in the operation and production of plastic packaging machinery. 

    Their main products are stretch film machines, multilayer co-extrusion internal cooling upper traction rotary blown film lines, and they are used in various industries such as electronics, logistics, chemical industries, construction, transportation, and food inclusive.

  • A13.

    Blown film line, being a technology-based professional plastic packaging machinery company, is a trusted company, and they are widely accepted all over the world because of their exceptional services which they render.

     As a result, blown film lines have a period of one-year warranty for any product you purchase from them apart from consumables.

    This period of one year starts on the day the blown film line arrives at your company after you must have ordered for it. Also, the 365- or 366-day assurance starts reading at the point when the engineers have finished commissioning the blown film line.

    Blown film lines are customer-friendly such that for the period of the one-year which you have a service contract with their company, you are at liberty to use their machine and have them freely fix it in cases where it becomes faulty.


  • A14.

    After you must have paid completely for the blown film line and it has been shipped to your destination, engineers that must have been assigned from the blown film line company close to you would have been sent to your company before the actual time of debugging.

    At the arrival of these engineers, they will assemble and debug the blown film lines depending on the setting of the factory. 

    Once they have confirmed that the machines are in good condition and can now work perfectly, they will begin training the members of staff of your company on how to operate the blown film lines, how to carry out production on it and how to perform routine maintenance of the blown film lines.

    Blown film line manufacturers care so much about you and your company, and that is why engineers are sent across to you who will help in training your staff so as to ensure they are competent enough to carry out an operation on the blown film line effortlessly.

  • A15.

    Due to the fact that the blown film line has passed the CE and SGS Certification of EU, making sure that all their products are safe and are fit for every environment all over the world without having to cause any issue for anyone, you cannot just get their product except you to make a reasonable payment. 

    Blown film line usually commences their production after they have received a payment that is about thirty percent of whatever product you are ordering for. 

    Immediately that a certain amount has been deposited, work will begin in their company, and once they have almost finished carrying out the production, you will have to pay the remaining seventy percent of the product or products you ordered for.

    Once you make the final payment, you will be sent pictures and video clips of the blown film lines when it is almost time for delivery. And after these criteria have been met, your blown film line will be packaged and shipped down to any location you're at.

  • A16.

    Blown film line is the manufacturers of world-class technology-based professional plastic packaging machinery.

    Internal cooling devices, stretch film machines, multilayer co-extrusion blown film lines, among many others, are the main products produced by manufacturers of blown film lines.

    These products are sold to various countries such as India, Turkey, Yemen, Europe, Pakistan, the Middle East, and other countries across the globe.

    Most of the products manufactured by blown film lines are specially modified and are all designed autonomously before they are finally produced. 

    It's okay to note that all blown film lines have electrical schematic diagrams and operation manuals written in both English Language and Chinese.

    Blown film line has been widely recognized and patronized by a huge number of people living across ninety countries in the world. 

    They have more than thirty years of experience an entirely complete set of technology in their possession. 

    Blown film line has been recognized as a company that meets the precautionary rules and regulations of most countries in the biosphere.

  • A17.

    Blown film line manufacturers have their offices situated in different locations across the universe within a short period of time of their arrival in the global market.

    You can find them in about ninety-three countries in the cosmos, including the Middle East, the United States of America, Latin American Countries, China, Europe, Southeast Asian countries, Canada, to mention but a few. 

    If you are keen on locating them, let's say, you do not want to order for their products online but to see for yourself what they do in their company, you can easily locate them in these places which will be mentioned below.

    They are situated in No. 104, National Road, Songgiao Industrial Zone, Zhejiang Province, China, Wenzhou City, Wanguan Town, China, and Pingyang County.

    If you consider booking an appointment with one of their top professionals who is a specialist in offering sales, ensure to take the next flight from your country of destination to Wenzhou Longwan Airport and it is also possible for you to take a train, depending on your convenience to Rui'an Station. 

    It is very important for you to have their sales specialist informed prior to your visit so that proper arrangements will be made for your pick up by their driver immediately you arrive.

  • A18.

    Blown film line manufacturers are professionals in the blown film line company. They work tirelessly to ensure they deliver satisfactory machines to their customers. 

    The blown film line manufacturers deliver complete blown film line services ranging from design to development and production of the product.

    They are committed to intelligently producing of blown film lines thereby reducing the number of staff and manpower in your company; they help in inspecting the line of products and also improve quality of products.

    This set of highly skilled professionals are one of the few state-level high-tech enterprises recognized by the National Department of Science and Technology in the state of China and perfectly finishes up the tasks their customers deliver.

    The production of the blown film line manufacturers has utmost reverence for the ISO9001:2005 quality system and has successfully undergone the certification of the TUV. 

    Blown film line manufacturers are keen on accepting trade globally, and they have also passed through the SGS certification of Switzerland and the CE certification of EU. These two certifications are widely recognized by the most wide-ranging nations across the world. 

    The above features of the blown film line manufacturers qualify them to be keen on supporting the businesses of their customers all over the world.

  • A19.

    PLASTAR blown film line manufacturers customize blown film lines for users based on three factors. 

    The three factors include performance requirements of the machine, application of the machine, and your individual habits. 

    The performance requirement entails the functions and features you want your blown film line to have, while the application requirement entails what you want to use your blown film line to produce, and your individual habits are based on your habitual actions regarding producing with blown film lines. 

    PLASTAR blown film lines manufacturers are committed to meeting the needs of clients in the most personalized way possible by using these three factors in the production of Blown Film Lines.

  • A20.

    PLASTAR ABA Three layer blown film lines and ABC three-layer blown film lines, and ABA three-layer blown film lines are recommended for the production of permeable films. 

    ABA Three layer blown film lines and ABC three-layer blown film lines help reduce production cost while producing materials and also has high wear resistance, thereby making them durable enough for the production of permeable films. 

    Both ABA three-layer blown film lines and ABC three-layer blown film lines are equipped with upgraded features such as centralized feeding, batching, weight control, which is all blended in the touch screen to help enhance an easier and faster production of permeable films. 

  • A21.

    PLASTER ABA three-layer blown film line and ABC three-layer blown film line are recommended for the production of agricultural seed packaging films. 

    The ABA three-layer blown film lines are effective for flexible production applications such as agricultural seed packaging films as they boost production and lower the cost of production. 

    The ABA three-layer blown film lines have two main motors that provide three-layer extrusion, the main machine gives the inner and the outer coating layers while the other machine is in charge of the inner filling layer; the goal of this to help you reduce cost and consumption while producing agricultural seed packaging films.

    ABC three-layer blown film lines are designed to be used for the production of a wide range of packaging films such as agricultural seed packaging film, liquid packaging film, electrostatic protection film, and many others. 

    Both PLASTER ABA three-layer blown film lines and ABC three-layer blown film lines have a high degree of hardness and resistance to wear, which makes them suitable for the production of agricultural seed packaging films. 

  • A22.

    The recommended blown film line used for the vacuum nylon packaging film is a five-layer blown film line. 

    PLASTAR five-layer blown film line has been particularly designed to produce a wide range of applications such as oil packaging, milk bags, vacuum packaging of solid containers, and many more. 

    Five-layer blown film line, just like every other type of PLASTAR blown film lines, is equipped with dual-alloy forced-feeding screws that feature excellent hardness and wear resistance. 

    This makes the PLASTER five-layer blown film efficient in the production of vacuum packaging of solid containers as they have a high level of hardness and wear resistance. 

    Five-layer blown film lines also use an advanced five-layer plane stacking mold, which makes optimizes the layout due to thermofluidics, which helps watch the fluid condition through the 3D simulation software. 

    Five-layer blown film lines also help reduces the amount of time your blown film line is unavailable due to maintenance because it ensures reduction of waste during the particle replacement procedure while printing vacuum Nylon packaging film. 

  • A23.

    The blown film line suitable for producing fruit bags is PLASTAR single-layer blown film line. 

    The single layer blown film line produced by PLASTER is most suitable for the production of fruit bags. 

    The single layer blown film line helps you maximize the utilization of heat energy while producing fruit bags by putting an end to the use of cooling fans, thereby increasing your production output while reducing your energy consumption rate.

    PLASTAR single layer blown film line makes use of a single-layer cone mold that helps reduce downtime maintenance and reduce particle waste in the particle replacement procedure in the production of fruit bags. 

    This happens because the single-layer cone mold ensures that each runner is able to clean itself under the PLASTAR's high-speed screws' intense pressure and high-speed scouring after the intense degree of polishing and coating.

  • A24.

    The recommended blown film lines for high barrier films are PLASTAR's 5-layer blown film lines.

    PLASTAR's 5-layer blown film lines have been designed specifically to be used to produce symmetric barrier films and asymmetric barrier films.

    PLASTAR's five-layer blown film line makes use of the most upgraded five-layer plane stacking mold, which helps optimize the layout due to the thermofluidics present and also monitors the fluid condition with the assistance of five-layer blown film line simulation software, which makes it efficient in the production of High Barrier films. 

    You do not have to worry about waste getting stored up in the waste and particle replacement place in the production of your high barrier films because PLASTAR five-layer blown film line help reduce waste during production as each runner has the ability to clean itself under intense pressure and high-speed scouring of PLASTAR's high-speed screws.

  • A25.

    The recommended blown film line for Milk bags are specifically of two types: AB two-layer blown film line and ABA three-layer blown film line. 

    The production line of AB two- layer blown film line is suitable for blowing high- density polyethylene, low-density polyethylene, and linear low-density polyethylene, which are generally used in the production of courier bag film and two-color film. 

    ABA three-layer blown film line gives room for more flexible production than producing milk bags require.

    ABA three-layer blown film line also helps save energy consumption and cost, which makes producing milk bags cheaper for you. 

    The production line of both AB two layer blown film and line and ABA three-layer blown film lines are equipped with advanced automation features such as centralized feeding, weight control, and batching.

    All of these unique functions have been integrated on their touch screen to enhance productivity and ease during the production of milk bags.  

  • A26.

    All blown film lines produced by PLASTAR, a professional blown film line manufacturer, are customizable. 

    Plastar is a top-rated blown film line manufacturer with more than 30 years of professional experience.

    PLASTAR blown film line is committed to providing a personalized experience to users based on the performance standards of the blown film line you want to buy down to your personal lifestyle habits.

    PLASTAR blown film lines have been designed to suit your needs completely; therefore, you can always make a request for any type of blown film line that is specific to the purpose you want to serve. 

    This is why the features, performance rate, and functions of each PLASTAR blown film line differ because every blown film line is built with your specifications in mind. 

    PLASTAR blown film lines come in different types to suit your purpose and fit into a wide range of different applications you want to use your blown film line for, ranging from shrink wrap films, stretch films, barrier films, food packaging, shopping bags, and many more. 

  • A27. Blown film lines are used to produce polymer films basically used by packaging industries, which include shrinking wrap films, stretch films, packing films, shopping bags, laminating film, and many other packaging materials.
  • A28.

    Polyethylenes, which include LDPE, LLDPE, and HDPE polymers, are the most common materials used in blown film lines. 

    It is important for you to understand the material properties of the resin you want to use for your blown film line.

    As much as you would want to use as many materials as you want so as the maximize your blown film line utilization, it is also important to note that blown film lines are different and are not designed the same. 

    Therefore, blown film lines will not be able to accommodate all the types of materials available, which is why polypropylene and polyethylene (LDPE, HDPE, and LLDPE) are mostly used because they work effectively and with minimum complications with a majority of blown film lines. 

  • A29.

    Three-layer blown film lines are a type of blown film line used to make a plastic film or plastic sheet. 

    Three-layer blown film lines are produced by high-quality raw materials with upgraded technology in sync with the required standards.

    Multilayer blown film lines are equipped with advanced automation functions like centralized feeding, weight control, IBC internal cooling, automatic central winding, weight control. All of these functions have been merged on the three-layer blown film extrusion machine touch screen, thereby enhancing your productivity and making it easy for you to operate. 

    Three-layer blown film lines have many protection features such as puncture and heat resistance, reduced or no attraction to moisture and oxygen, and many others.

    Three-layer blown film lines are an advanced feature and increased efficiency low energy consumption blown film line due to their IBC cooling system.

    The most common raw materials used in three layers blown film line is HDPE, LDPE, LLPE, EVA, MPE, and PP.

    Three-layer blown film extrusion lines can be used to produce a symmetrical film, shrink film, a waterproof film in ponds, liquid packaging film, electrostatic protection film, and many others. 

  • A30.

    Multilayer blown film lines are produced to be suitable for a variety of applications, which include masking and shrinkable films, lamination, vacuum package, adhesive, agriculture, and many more.

    Different types of raw materials can be used for multilayer blown film line extruder, and laminating each film layer to be suitable for the required properties isn't a necessity. 

    Multilayer blown film lines are suitable for the production of high-quality films. 

    However, two selections of die rotating unit or Nip roll oscillating unit and three selections of winding system, Turret Touch and Gap Winder, Shaft Roll Winder, surface touch winder are recommended depending on the application and system of extrusion in multilayer blown film lines.

    Multilayer blown film lines use a blend of two features of the PP material and the brightness features of PE material and can be classified into several types such as two-layer blown film line, three-layer blown film line, five layers blown film line, seven-layer blown film line and many others. 

    It helps to produce tubing in a single circumstance, regulates film width and thickness, which is -dependent on the capacity of air in the bubble, extruder output, speed of the haul-off. It eradicates edge bead trim, non-uniform temperature and enables biaxial orientation.

  • A31.

    Blown film lines are a technology that is commonly used by the industrial, plastic, and consumer packaging industries to make plastic films, shrink wrap films, and many more. 

    The blown film lines process involves extruding a tube of the molten polymer via a die and blowing up many times its initial size to make a thin film bubble. 

    The bubble is therefore flattened and used as a lay-flat film or converted into packaging bags.

    The most common raw materials used in this process are low-density polyethylene (LDPE) and High-density polyethylene (HDPE) and are often mixed with other types of polymers and additives.  

    Blown film lines are suitable for producing high-quality plastic films for different types of applications such as lamination film, stretch hoods, film for FFS industrial bags, PE film used for packaging, barrier as well as high barrier films, and a lot more.

    However, the type of material each blown film line is capable of producing is highly dependents on its sizes and specifications. 

  • A32.

    If you are experiencing any problem with your blown film extrusion machine, feel free to contact PLASTAR blown film extrusion machine manufacturer as they are a technology-based professional plastic packaging machinery manufacturer.

    They are professionals in their field, timely, trustworthy and customer-friendly. PLASTAR blown film machine manufacturers take their customers’ problems as theirs.

    If you contact them, they will communicate to you via video call or face-time through which they will explain to you in details how you can single-handedly solve the technical issues you are experiencing. 

    But if the problem persists, they will refer an engineer to you who will help you cross the t’s and dot the i’s of the problems you may be facing with your blown film extrusion machine.

    In another case, if the damaged part of your blown film extrusion machine is a non-consumable one, and still falls within the period of warranty, consider having another blown film extrusion machine from their company without the need to pay a dime.

    Good to note that PLASTAR blown film extrusion machine manufacturer has got you covered even down to paying their transportation fare to your site at the time you experience any trouble-shooting with your blown film extrusion machine.

  • A33.

    Both the ABA three-layer blown film co-extrusion machine and the ABC three-layer co-extrusion machines are good, but they are quite different for the purposes you might intend for them. 

    ABA blown film machine is a general-purpose film production machine in that the production line of the ABC machine can be used to producing a wide range of products from packaging films, symmetrical film, liquid packaging film, electrostatic protection film, heavy packaging film, while ABC machine is a machine that gives you a competitive advantage over other types of blown film extrusion machine in that it is more flexible and saves more energy during production while you enjoy lower costs of machine and products.

    Also, ABA three-layer blown film co-extrusion machine has two main motors that provide three-layer extrusion, in which one of them is responsible for providing inner and outer coating layers of your products, while the other main one produces the inner filling layer of your products.

    It can also use recycled materials and calcium carbonate for up to 70% proportion of the materials used for production.  

  • A34.

    PLASTAR’S blown film extrusion machine is trusted by more than 3000+ customers for many reasons. 

    PLASTAR has been existing for more than 30 years and is trusted by all because they master the core of the technology flow in the process of blown film machine. 

    PLASTAR also uses more than ten German machining center production lines in the processing of the mold of their blown film extrusion machines. 

    Their blown film extrusion machines have also gotten different certifications worldwide. 

    Their machines have passed the CE certification of the EU, SGS certification of Switzerland, and the German TUV certification. 

    These certifications back PLASTAR’S claim that their machines are safe, environmental-friendly, of good quality, meet safety qualifications all around the world, and match customers’ requirements and satisfaction.

    Their blown film extrusion machines are produced in varieties and can be customized according to customer’s requests as well to suit their needs and their equipment. 

    Also, PLASTAR is committed to creating intelligence automation of their blown film machines to increase the productivity of the machines. 

    The production of these intelligent automation lines of machines has helped relieve the dependence on skilled workers, reduce productivity defects, and enhance overall efficiency in producing the objects of their customers.

  • A35.

    PLASTAR blown film extrusion machines come with an operational manual and electrical schematic diagram.

    Because each blown film extrusion machine is built and designed to suit the needs of clients, they are built separately and customized according to the personalized purpose they want it to serve. 

    Due to their customized nature, each blown film extrusion machine comes with an operational manual and electrical schematic diagram. 

    The operational manual and electrical schematic diagram that comes with PLASTAR blown film extrusion machine come in Chinese and English language to meet a wider coverage of the language needs of a PLASTAR blown film extrusion machine manufacturers, distributors and clients in the packaging industry.

    PLASTAR blown film manufacturers have provided the operational manual and electrical schematic diagram to make set up and operation easier for end-users.

  • A36.

    PLASTAR is in charge of Blown film extrusion machines in large and quality quantities to distributors, wholesalers and those in the packaging industry across the globe.

    At PLASTAR blown film extrusion machine manufacturing company, the production of blown film extrusion machines takes place between 30 to 60 working days.

    However, the length of the period is greatly determined by the size and configuration of the machine because PLASTAR blown film manufacturers are committed to producing customized machines in order to create a personalized experience for end-users.

    To do this, PLASTAR produces and designs blown film machines according to the size and configuration that best suits the needs of clients and end-users. 

    Once, the configuration and size are determined, PLASTAR would provide the exact date that a client’s blown film machine would be available. 

  • A37.

    PLASTAR is a professional blown film extrusion machine manufacturer who produces and deliver complete blown film extrusion machines to manufacturers, distributors and those in the packaging industry. 

    PLASTAR blown film extrusion machine company is located in Songqiao Industrial zone, Soulou, No.104 National Road, Wanquan Town, Pingyang County, Wenzhou City, Zhejiang Province, China. 

    To visit PLASTAR, board a plane to Wenzhou Longwan Airport, or you can visit them via train by going to Rui’an Station. 

    Before your visit to PLASTAR, please book an appointment with their sales specialist beforehand.

    When you book an appointment with PLASTAR, blown film extrusion machine manufacturing specialist, the driver would come and pick you up at the station you are. 

  • A38.

    Purchasing used blown film extrusion machines is not advisable as they would be below standard in terms of quality, performance and durability. 

    Investing in new, quality blown film extrusion machine is a better choice has you would be guaranteed long term efficiency and durability. 

  • A39.

    Direct extrusion has the highest friction when producing objects.

    This is because the force needed to extrude the billet is higher than the one needed in other extrusion processes due to the high friction needed for the billet to go through the container of the blown film extrusion machine.

    This force increases as soon as you inject billet into your machine, and decreases as the billet is being processed, and the force picks up when the material is exiting the die.

    Friction is an important factor in direct extruding, which is why the friction involved in this process is higher than the other processes.

    When the material moves in the direction of the punch, the punch moves towards the die.

    This causes a higher friction between the billet and container.

    The dummy block between the ram and the metal causes pressure in the ram and causes the metal to fill up the cylinder first before going through the die opening.

  • A40.

    The difference between extrusion and injection molding is that extrusion molding is required to produce linear, two-dimensional shapes, while the injection molding process is used to produce three-dimensional shapes that do not maintain a parallel line shape.

    There is also a difference in their fluidity.

    Injection molding requires high fluidity, especially when you are producing large-scale and thin-walled products with your blown film extrusion machine.

    While extrusion molding requires less fluidity because the extruder is open and there is nothing stopping the material to die reversal.

    The melt strength of both is different as well.

    Injection molding doesn't require high melting strength, and objects are produced in a mold form, which means that products solidify immediately they are injected out.

    Extrusion molding involves low melting strength which causes the objects not to solidify immediate the materials exit the die, and they may not shape correctly. 

    After this, materials sometimes undergo other processes like thermoforming or hollow blow molding so that the objects can solidify properly.

    The tool used for injection molding is mold, while for extrusion, it is die.

    The plastic material used for them both are different, in that for injection molding, material is melted and injected inside the mold, cooled, and then ejected from the mold, while for extrusion, the material is melted in the die, pressurized and then extruded after the material is cooled.

  • A41.

    Extrusion process is not suitable for iron and iron metal extrusion.

    Producing an object with iron alloys may ruin your blown film extrusion machine because they are not fit for production.

    Some of the plastic materials fit for extrusion process are polyethylene, polypropylene, nylon, polycarbonate, acrylic, polyvinyl chloride, ABS, polystyrene and nylon. 

    Any other material apart from iron will extrude perfectly shaped objects that you have in mind.

    The materials that are commonly used for extrusion are metals, polymer, ceramics, concrete, and foodstuff. 

    However, before you pick out the materials to use in your machine, consider the viscosity and the melting point differences of the materials. 

    The viscosity of a material has to do with its resistance to flow. You know it is important for your material to flow so that it can be easily extruded out of the die. 

  • A42.

    Before you increase the extrusion speed of your blown film extrusion machine, you need to check the flow rate of your extruder to know whether it’s not over extruding or under extruding.

    The flow rate controls the speed at which the extruder will extrude materials to form products.

    If you are experiencing under-extrusion, it means your machine has an inadequate flow rate.

    To set your flow rate, open custom settings on your machine, right-click on it and click "configure setting visibility."

    After that, click the “check all’ option so that it can expand your settings.

    Locate “material setting,” and below it, you will see “flow rate” and “initial flow rate.”


    If your machine is experiencing under extrusion, try to increase the flow rate of your machine by 5% and examine the outcome if it matches what you have in mind.

    If it doesn’t, keep increasing till you are satisfied with the outcome of the extrusion; be however careful not to increase the flow rate too much and cause your machine to over extrude and ruin your products. 

    If you changed your flow rate and the extrusion is still not what you want, you should consider checking out other technicalities that may cause this.

    The problem could be caused by low print temperature, clogged nozzles, or fast print speeds.

    If you want to consistently maintain the productivity of your machine at a good speed rate, ensure regular and routine maintenance of your machine.

  • A43.

    Extrusion molding is used due to its volume of productivity, speed, low cost, flexibility, and post-extrusion altercation option.

    With extrusion molding, you can produce a large volume of plastics effectively and efficiently.

    It is also cheaper than other molding types in that you can reuse waste materials, making production less expensive, unlike with other molding types like blow molding.

    Your blown film extrusion machine can also work for long hours, allowing for long productivity time for as long as 24 hours in a day, increasing the productivity of your machine and products.

    Extrusion molding is also flexible in that it is flexible in the production of materials, and can produce products with cross-section and products with mixed plastic attribute.

    With extrusion molding, you can also alter production because after products are extruded, they remain warm, giving room for you to mold and remold them into more desirable shapes.

    Your machine can produce up to 60 feet length products at a go. You tend to be more productive with extrusion molding, and at a cheaper cost compared to other molding types.

  • A44.

    You can apply two main methods to adjust an extrusion multiplier, viz; Precise Method and Visual Method.

    Under the precise method, precision tools including calipers are used to calibrate the extrusion multiplier, while proper observation is best applied following the visual processes. 

    It is important to note that you will get the same results from both processes dependent on the one you prefer to use on your blown film extrusion machine.

    Precise Method: 

    Install the Precision Method Cube STL

    Use the Vase Mode or the layer height you often use to slice it and then print it

    At the center of each wall, make up to three measurements and calculate their regular thickness

    Using the formular; Extrusion multiplier equals Extrusion width/ Average measured thick wall

    Go to the filament settings and adjust the extrusion multiplier

    Go ahead to print the cube making use of the new settings 

    If you deem it fit, make some measurements at the center of each wall and calculate the normal average thickness.


    Visual Process:

    If you plan to apply this method, there is no need for you to make use of any tool. All that is required of you is having your eyes absolutely fixed on the work. Here is to ensure that you get a satisfactory result.

    Install the Visual Method Cube STL

    With the aid of Prusa PLA presets at 0.20mm layer height, slice the extrusion multiplier and print it

    Check the topmost part of your cube thoroughly making use of your fingertip

    If the topmost layer is rough, then consider re-adjusting the extrusion multiplier by one to two percent

    You can repeat the method as many times as possible until you achieve your desired result

  • A45.

    When under extrusion occurs in your blown film extrusion machine, you can fix it by doing the following:

    Intensify your extrusion multiplier: The moment you discover that your extruder isn’t asserting as much filament as you expected, the next thing you should do is to intensify the flow of extrusion in your slicer. 

    When you do this, the end result will be more flow of filament which will turn out massively.

    You should however be careful when increasing your multiplier as too much of the surge can amount to jamming, hence, leading to destruction of some materials.

    Increase the temperature: Once you discover that the temperature of your machine is low, it's not a bad idea to increase it. 

    This is because low temperature amounts to improper flow of filament. 

    Nozzle temperature is a very important figure you need to put in place when considering fixing under-extrusion. This can be achieved by constantly printing a test and regulating the temperature.

    You may as well consider producing a single temperature tower which you can use to check numerous temperatures at a point in time.

    Correct your filament diameter: You can use this to fix filament diameter input which are not correctly motioned.

    Take for instance you input your filament incorrectly, you won’t get an accurate result unless you correctly fix it in order to avert future issues.

  • A46.

    The main blown film extrusion machine defects are Centre Cracking, Piping Defect and Surface Breakage.

    It is important to note that these are categorized based on the factors responsible for their faults during the process of manufacturing, such as the geometric shape and the operational factors of the extrusion.

    Centre Cracking: Center Cracking occurs during the time when the piece of work is undergoing extrusion via the die. The force which occurs during the work breaks the material, thus, causing cracks to appear around the central axis of the extruded area. 

    You will find it difficult to detect center burst since it occurs within the material of the part.

    Arrowhead rupture, chevron cracking, Centre burst and center cracking are the names attributed to center cracking in the manufacturing company.

    Piping: This defect takes place when sections are manufactured via direct extrusion. It occurs when there is inadequate flow during the process of extrusion. 

    The way out of this is by using a good surface preparation of the operation and a dummy block. 

    Other words used to describe piping are fishtailing or tailpipe.

    Surface breakage: This is the kind of rupture which occurs on the topmost part of the work. 

    The defects on the outward begins in form of cracks and then extends into other part of the material through diverse degrees. 

    You will experience surface rupture occurs when too much stress is placed on the parts of the material.



  • A47.

    Draw Down Ratio (DDR) happens to be the degree to which the malleable has been abridged in magnitude to make the portion. 

    Also, it is the ratio of the sectional division of the extruded plastic melt to the subsection of the plastic in its final form, including insulation a tube or hose on a core, be it cable or wire. 

    A grander Draw Down Ratio (DDR) of the blown film extrusion machine gives room for quicker rate of manufacturing while a lower one facilitates a more specific control of the dimensions of the products. 

    It is good to note however, that the lower the drawdown ratio, the firmer it is during operation. Also, you will be able to identify a more productive drawdown ratio depending on the ability and skill of the producer.

  • A48.

    Blown film extrusion can use plastic materials only. 

    The different types of plastic materials that can be used include: 

    PVC: PVC comes in different colors and levels of flexibility and rigidity and are highly durable.

    ABS:  ABS are strong, and are commonly used to produce household materials.

    Thermoplastic elastomers: Thermoplastic elastomers are widely used due to their stability.

    Polyurethane: Polyurethane are commonly used in oil and gas industries due to their high abrasion resistance. 

    Polypropylene: Polypropylene are strong and resistant to organic solvents.

  • A49.

    There are many different types of blown film extrusion machine available for sale. 

    They include:

    Five-Layer Co Extrusion blown film machine

    ABC Three-layer co-extrusion machine 

    ABA Three-layer co-extrusion machine 

    AB Two-Layer co-extrusion machine 

    Single-Layer Blown Film Extrusion machine 

    Mini Blown Film Extrusion machine 

  • A50.

    You can calculate the Extrusion Speed of your blown film extrusion machine using the calculation conditions below: 

    Choose the primary billet temperature T= 1180°C, extrusion speed (v) = 200 mm−1, friction factor m=0.05, die angle α=55°, die land length l=60mm and modify the extrusion ratio from λ= 4.63, 5.47, 6.37, 7.32 and 8.33 matching lodgings outer diameters are 700, 750, 800, 850 and 900 mm, in order to explore the outcome of λ on the process of extrusion.

    Pick the extrusion ratio λ =5.47, speed of extrusion v= 200mm s−1, friction factor =0.05, die angle α = 45°, die land length l = 60mm and alter the first billet temperature from T = 1050, 1100, 1150, 1200 and 1250°C so that you will be able to see the result of the extrusion process.

    Choose the ratio of extrusion λ= 5.47, extrusion speed v =200 mm s−1, original billet temperature T = 1180°C, friction factor m = 0.5, die angle α = 45°, die land length l = 60 mm and alter the extrusion speed from v = 150, 200, 250, 300 and 350mm s−1 just so you’ll observe the outcome of extrusion speed on the extrusion procedure.

    Choose the extrusion ratio λ 5.47, speed of extrusion v = 200 mm s−1, the initial temperature of billet T = 1180°C, friction factor m = 0.05, die land length l = 60 mm and change the die angle from α = 35°, 45°, 55°, and 65°, in order to discover the results of α on the extrusion progression.

    Pick the extrusion ratio which is 5.47, v as 200mm s, initial billet temperature as 1180°C, friction factor m as 0.05, die angle from α 30, 45, 60, 75 and 90 mm in order to explore the resultant effects of length on the extrusion procedure.

  • A51.

    The extrusion ratio is the ratio of the area of the billet cross-section and the extrusion cross-section area. It is sometimes referred to as the reduction ratio. 

    A rule of thumb of extrusion ratio is that if the mechanical properties in an alloy are high, the extrusion ratio should below.

    That is, if you set the ratio of a mechanical property low, less work will need to be done on the materials, meaning that the extrusion ratio will determine how much mechanical work will be done on a material.

    The range of extrusion ratio for the soft alloy is 10.1 – 100.1, while for the hard alloy, it is 10.1 – 35.1.

    Your blown film extrusion machine ratio range is based on the shape of the extrusion of the machine. 

    Therefore, the higher the extrusion ratio, the harder it will be for your machine to extrude materials.

    That is, when the extrusion ratio is high, the die opening is smaller, causing more force and pressure to push out materials from the tiny die opening. 

    Consequently, the extrusion ratio affects how materials flow out of the extruder. 

  • A52.

    The die gap is the opening between the two metal faces that make up the die. The space between the metals is what is called the Die Gap.

    The size of the die gap is usually between 0.8mm to 2.8 mm, and you can adjust it to fit your printing purpose.

    You can control the die gap either manually, by hand, or automatically. Either way, it needs maintenance and calibration regularly so that your prints can be produced efficiently.

    Whether your die gap is narrow or wide, it affects your print outcomes one way or the other.

    If the width of your die gap is wide, and you are printing with low-density polyethylene LDPE, the outcome of your products might be better than if you are printing with linear low-density polyethylene LLDPE material with the same wide gap.

    Therefore, a narrow die gap is fit to print LLDPE, while a wide die gap is appropriate for LDPE printing.

    Different die gaps work for different printing materials.

    In case you want to adjust the die of your blown film extrusion machine, ensure your safety. Adjusting the die gap can be tasking and dangerous at the same time.

    Ensure not to stand in front of the die when it is hot and filled with materials because while you are adjusting, materials may gush out of the die lip and harm you. 

    For safety, you can adjust your machine’s die gap when the machine is not in operation.

  • A53.

    Hot extrusion and cold extrusion are types of extrusion that takes place in the blown film extrusion machine. 

    Hot extrusion takes place at a high temperature, which is usually around 50 to 75% of the metal's melting point.

    When undergoing the hot extrusion process, it is necessary for you to lubricate as the pressure usually ranges between 30 to 700 MPa.  

    You can use oil or graphite if you are running lower temperature extrusions, or you can make use of glass powder if you are running higher temperature extrusion, while cold extrusion is done at room temperature or close to room temperature.  

    The cold extrusion process is commonly used to design strong tools that can resist the stress of the extrusion process. 

    Advantages cold extrusion has over hot extrusion include a better finish, higher strengths, and faster extrusion speed. 

    Aluminum, lead, tin, molybdenum, vanadium, and steel are examples of metals that can be extruded using the cold extrusion method.

  • A54.

    Extrusion dies are essential components of the Blown Film Extrusion Machine.

    Extrusion dies are thick, circular steel disks with one or more openings. They are manufactured from H-13 die steel and are heat-treated to help withstand pressure and extend their longevity.

    There are three different types of dies: solid, hollow, and semi-hollow.

    Solid dies are the least expensive type of die as it produces shapes with no enclosed void or openings such as solid bars, angles, and rods.

    To produce a solid profile, you would need a die stack which consists of a die plate that helps form the shape, a feeder plate that helps monitor the metal flow via the die orifice, a backer plate that prevents collapse by supporting the die tongue, and a bolster that holds up the extrusion load that has been transferred from the die.

    Hollow dies produce shapes with one or more openings like a simple rectangular tube or a complex tube with many voids.

    The porthole die commonly used to extrude hollow shapes and is made up of two interconnected parts known as the mandrel and the cap.

    The mandrel makes up the internal features while the cap makes up the external features, which are usually arranged in the mandrel.

    Just like the hollow shape, the semi-hollow shape can either have a void or voids. However, the voids are partially and not completely enclosed as there is an opening.

  • A55.

    Cast extrusion occurs in the Blown Film Extrusion Machine.

    The first thing to do in the cast extrusion process is to pack plastic resins into one or more extruders, then, the plastic resins melt and get mixed together through the extruder, after which they are filtrated and supplied to the die system.

    After the melted plastic resins leave the die, they enter the cooling unit, and its temperature is reduced through a water chill roll to freeze the film and then transported downstream to trim its edges and wound it into rolls.

    The cooling system in cast extrusion is highly functional, which increases production line speed, thereby increasing production results.

    The thickness diffusion in the machine cross direction is more even in cast extrusion processes when compared to the blown film extrusion machine process basically because the degree of draw and orientation is very low in the cast extrusion process.

  • A56.

    The 5 layer Blown film extrusion machine is a type of blown film extrusion machine suitable for EVOH, Nylon, LDPE, and Metalloscenes and can be used for a wide range of applications such as lamination grade films, courier bags, oil packaging, and food packaging.

    5 layer blown film extrusion machine helps increase your productivity and flexibility by helping you produce different varieties of products from a single line.

    5 layer blown film extrusion machine guarantees that all property polymers have a thick skin layer and all cheap materials have a thick skin layer, thereby giving you room to produce different kinds of films to meet your specific needs.

    5 layer blown film extrusion machine is equipped with the most advanced plane stacking mold, which helps you increase productivity and the quality of cooling.

    The 5 layer blown film extrusion machine is your quick answer to achieve high-quality and detailed prints due to its advanced features.

    https://www.youtube.com/watch?v=jmtmfSML7lg

  • A57.

    The Monolayer Blown Film Extrusion machine, also known as single-layer blown film extrusion machine, is a type of Blown film extrusion machine specifically designed to print continuous length of plastic pieces from a specific resin type and is commonly used to produce agricultural covering film, degradable film, clothing bag film, and many others.

    If you want to blow high and low-pressure polyethylene, then you should consider the Monolayer Blown Film extrusion machine as it puts an end to the usage of cooling fans and helps you make the best use of heat energy, thereby increasing production output and conserving energy rate.

    A monolayer blown film extrusion machine makes use of a single-layer cone mold and also equips each runner with the ability to clean itself during intense pressure, thereby reducing the presence of dirt in the particle replacement area.

    The monolayer blown film extrusion machine is equipped with advanced automatic functions such as weight control, automatic central winding, batching, and a lot more, which have been merged with the touch screen to aid your printing process.

  • A58.

    The prices of Blown Film Extrusion Machine vary depending on their functions and sizes.

    You can get the prices from the ranges of twenty thousand US Dollar to two hundred thousand US Dollar.

    It is important for you to bear in mind that these machines cannot be sold at the same price in your different localities.

  • A59.

    3-layer co-extrusion machine is a type of blown film extrusion machine used to produce greenhouse sheets, agricultural film, construction sheets, food packages, sacks, and many more

    3-layer co-extrusion machines are equipped with advanced automation functions for effective print production and are mainly of two types:  ABA three-layer co-extrusion blown film extrusion machine and ABC three-layer co-extrusion machines.

    ABA three-layer co-extrusion machine is equipped with two motors that produce the three-layer extrusion: the first machine produces the inner and outer coating layer while the other machine produces the inner filing layer, which helps conserve energy and reduce cost.

    ABC three-layer co-extrusion machine can be used to produce liquid packaging film, electrostatic protection film heavy packaging film.

    The Three-layer co-extrusion machine has an IBC cooling system inside the bubble, which increases its efficiency and provides low energy consumption.

    Three-layer co-extrusion has the capacity to produce varieties of materials such as the LDPE, HDPE, PP, additives, masterbatches, sealant polymers, and lots more.

    The short polymer flow passages of a three-layer blown film extrusion machine help speed up the extrusion process and enable you to change materials quickly.

  • A60.

    About 30% of food worldwide is wasted due to the lack of proper packaging. By 2050, the global population is expected to reach 10 billion. As the urbanization is accelerated, proper food packaging is urgently needed during the transportation from the place of origin to various cities to avoid unnecessary loss.

    In addition, as the industry is growing, a great deal of food packaging applies barrier films to extend the shelf life, which reduces costs and increases sales and storage cycles.

    Therefore, the cutting-edge barrier films composed of 7 to 9 layers are in great demand in the food industry.

  • A61.

    In the actual production environment of a blown film machine, dust, impurities in plastic particles and other substances are inevitable. This requires us to add a filter device between the screw and the mold to filter out impurities before they enter the mold, and prevent impurities from entering the mold to affect the transparency of the film.

    Since it is being equipped with an additional filter, the three-way screen exchanger can resist the passage of molten plastic particles to a certain extent. The refluxed molten plastic is mixed and refined again so as to improve the fusion of the plastic formula in the screw and the plasticization of plastic particles, and enhance the quality of the film.

  • A62.

    The recycled material refers to the plastic particles reshaped from recycled plastic film after being treated and then melted by a pelletizer.

    The first-grade recycled material refers to the leftover material that is not contaminated with impurities, such as the edge of the online slitting of the blown film machine, and the plastic punched in the production of vest bags.

    The recycled plastic particles processed with these leftover materials have better transparency. The quality of the particles formed by the pelletizer can rival that of the new material, so it is called the first-grade recycled plastic particles or the super-grade recycled plastic particles.

    The second-grade recycled material refers to the recycled film that has been used once. It is judged by observing the transparency, brightness and surface roughness of recycled plastic particles formed by the pelletizer.

    The third-grade recycled material refers to materials that have been used twice or more. The elasticity, toughness and other properties of the recycled plastic particles formed by the pelletizer are not outstanding, so the material can only be used for injection molding. The first-grade and second-grade recycled plastic particles can be used for film blowing.


    Price grades of recycled materials:

    First-grade recycled plastic particles: 70-80% of the price of new raw materials;

    Second-grade recycled plastic particles: 50-70% of the price of new raw materials;

    Third-grade recycled plastic particles: 30-50% of the price of new raw materials;

    The above price ratio is for reference only

  • A63.

    Different types of plastic particles have different plasticizing temperatures. If different plastic particles are plasticized in a screw at the same time, some plastic particles will not be fully plasticized due to the excessively low temperature, or suffer melting fat rupture due to the excessively high temperature. Therefore, a single screw cannot be used for the production of multi-characteristic plastic film even if it mixes plastic particles with different characteristics.

    In addition, simple mixture is not sufficient to produce characteristic films, we need modular lamination of different layers, each of which has their respective functional layer.

  • A64.

    Compared with the single-layer blown film machine, the multi-layer co-extrusion blown film machine requires more screws and purchase costs to produce film. Why do we choose a multi-layer co-extrusion blown film machine?


    The selection of the multi-layer co-extrusion blown film machine actually depends on the application scenarios of the target film produced. If the film produced is mainly used as the packaging material for heavy packaging, high-end food bags, vacuum packaging bags, liquid packaging bags, etc., it needs the functions including fragrance preservation, freshness preservation, corrosion protection, air tightness, and extended shelf life. A single-layer and single-characteristic film can never live up to these functions.

    In order to produce a film that is qualified as a packaging material, and blow and co-extrude materials with a variety of characteristics (such as breathability, heat preservation, toughness, etc.) to form a multifunctional plastic composite film, we have to choose a multi-layer co-extrusion blown film machine.

    The purpose we choose a multi-layer co-extrusion blown film machine is to give full play to the advantages of multiple materials and avoid the shortcomings of a single material or single-layer blown film machine. Taking the PP/PE co-extrusion blown film machine as an example, the machine combines the high hardness of the PP material and the high brightness of the PE material to produce a film that has the characteristics of both.

    We have the following models of multi-layer co-extrusion blown film machines:

    Two-layer co-extrusion blown film machine,

    Three-layer co-extrusion blown film machine,

    Five-layer co-extrusion blown film machine,

    Seven-layer co-extrusion blown film machine, etc.

    For example: The five-layer co-extrusion blown film machine mainly uses plastic particles with gas barrier properties, such as HDPE, MHDPE, LDPE, LLDPE, MLLDPE, PA, EVOH, etc., to produce food packaging films that require fragrance preservation, freshness preservation, corrosion protection, air tightness, and extended shelf life.

    Multi-layer co-extrusion is to extrude multiple layers of plastic particles from one die at the same time. Most food packaging films and special films are produced by this co-extrusion lamination.

  • A65.

    The reasons of high stickiness and small opening of commonly seen LDPE films are as follows:

    1、The grade of the plastic particles is incorrect. The particles used are not dedicated to the blown film machine. The particles contain zero or low content of anti-blocking agent.

    2、The temperature of the blown film machine is too high, and the flow rate of the molten particles is too fast.

    3、The blow-up ratio is too large, resulting in poor film opening.

    4、The cooling speed of the air ring of the blown film machine is too low, and the film is not sufficiently cooled, resulting in mutual adhesion under the action of the upper traction roller.

    5、The traction speed of the blown film machine is too fast and the frost line is too high.



    Solution:

    1、Replace the plastic particles, or add a certain proportion of anti-blocking agent to the particles.

    2、Appropriately reduce the temperature of the screw and the mold.

    3、Reduce the blow-up ratio.

    4、Increase the cooling air volume or adjust the temperature of the air cooler.

    5、Appropriately reduce the speed of the traction roller.

  • A66.

    The frost line of the blown film machine refers to the dividing line of the molten plastic from the fluid state to the solid state.

    In the production process of the blown film machine, LDPE is in a melt flow state when it is extruded from the die while maintaining sound transparency. After leaving the die, the cooling air ring cools the inflation zone of the film bubble. When the cooling air blows to the plastic film bubble just extruded from the die, the hot film bubble will contact the cooling air, the heat of the film bubble will be taken away by the cold air, and the temperature will obviously drop below the temperature the LDPE requires to maintain the melt flow state, thus causing the film bubble to cool, solidify and turn blurred. On the film bubble of the blown film machine, we can see a dividing line between transparency and blur, which is the frost line of the blown film machine.

  • A67.

    There are many conveying guide rollers on the blown film machine, which assume different roles in their respective positions.


    Carbon fiber roller: Mostly used on the stabilizer frame. The film has not completely cooled due to the high temperature near the die (easy to scratch the surface). The carbon fiber roller is characterized by light weight and high temperature resistance. It can easily pass through the film without fearing the long-term effect of high temperature.


    EPDM rubber roller: Film conveying requires greater friction. We usually choose a rubber roller as the power transmission roller. In terms of material selection, we will have more considerations and will use EPDM, which is because of the particularity of the blown film machine industry.

    Many blown films will be treated to remove static electricity to match the subsequent printing operations, Electrostatic removal by electric shock will generate ozone gas, which will accelerate the aging and cracking of ordinary rubber rollers. The rubber roller made of EPDM is lighter in weight and has heat resistance, aging resistance and ozone resistance. So we will choose a more suitable rubber roller based on many considerations.


    Curved roller: Curved rollers are arranged near the winding part of the blown film machine. The curved roller forms an arc on one side of the roller shaft, which stretches the film when it rotates to eliminate wrinkles and prevent possible intertwining during material cutting.


    Aluminum guide roller: Aluminum guide rollers are mostly used on one blown film machine due to its low resistance, light weight and flexible rotation. 

  • A68. The upper traction speed is an important data for blown film machine production. The molten plastic is extruded from the die and pulled up by the upper traction. Under the same extrusion volume, increasing the pulling speed of the blown film machine will make the film thinner. Slowing down the pulling speed of the blown film machine will make the film thicker. Therefore, if you do not want to frequently adjust the pulling speed and waste raw materials when you are switching the blown film specifications, the meter weight controller is an ideal option.
  • A69.

    The traditional method of film bubble cooling is to cool down the outside of film bubbles with an air ring. If the film is thick or the film is made of multiple layers of powerful barrier materials, only cooling the outside of film bubbles with an air ring will not be enough. The slow cooling speed, high frost line, unstable film bubbles, and poor film opening will all compromise the quality of films.

    The IBC internal cooling uses an inlet fan to send the cooling air from the outside to the film bubble, while an exhaust fan discharges the hot air. Then it uses three ultrasonic probes to align the film, and determine the position of the film and the size of the tube by using the algorithm that the isosceles triangle is tangent to the film circumference. The hot air inside the film is exchanged with the air from the cooler, and the circumferential diameter of the film is stable.

    The IBC internal cooling device exchanges hot and cold air in the bubble, which can not only increase the yield and the opening of the film, but can also exchange and eliminate the peculiar smell generated by the resin raw material at high temperature. The film produced with this method is more suitable for food packaging and medical supplies packaging.

  • A70.

    The priority is to save the power loss of the blown film machine, and reduce the loss of electric heating. Nearly 40% of the power loss of the blown film machine is caused by electric heating, so how do we save the heating power of the blown film machine?

    Traditionally, we use electric heating coil in combination with fan cooling, which is primitive. PLASTAR uses a smarter algorithm to optimize this process.

    When the set temperature is close to the actual temperature, we use the pulse to break the heating screw. Then we heat for several milliseconds, measure the actual temperature after 1 second of stabilization, and repeat the circle over and over. During the operation of the blown film machine, the temperature will continue to decrease due to environmental temperature and heating of plastic particles. The used of the pulse heating method can reduce or eliminate the need of fan cooling and avoid frequent heating and heat dissipation. It not only reduces the power loss, but also reduces the wear and tear of the blown film machine. Eventually, the temperature control will be more accurate, the bubble will be more stable, and the quality of films produced will be improved.

  • A71.

    Temperature control is very important for blown film machines. Each plastic particle has a specific melting temperature.


    If the heating temperature is less than the melting temperature:

    1、After the plastic particles are melted, their flow speed in the screw and the mold will slow down, and the output of the blown film machine will decrease.

    2、Because the temperature is lower than the melting temperature, the plastic particles are not completely plasticized, and particles in the screw are not completely mixed and combined. The film will produce crystal points, and the film formula is not completely mixed, resulting in poor film quality.


    If the heating temperature is greater than the melting temperature:

    1、When the plastic particles are exposed to the temperature higher than the melting temperature, the melting fat will rupture. The transparency of the film will decrease.

    2、The melting fat will rupture due to long-term exposure to high temperature. A small amount of black spots will appear on the surface of the film.

    3、The bubbles will be unstable, serpentine, twisted and rise.

    Therefore, if the temperature of the blown film machine is not accurately controlled, the problems mentioned above will appear alternately, which is a bad sign.


  • A72. The screw of the blown film machine has the function of conveying particles, while the plastic particles will not be molten until the heating ring surrounding the screw reaches the target temperature. In order to stabilize the temperature of the heating ring, we have to stabilize the temperature control of the screw by heating with the heating ring and air-cooling with the cooling fan. If the current set temperature is less than the actual temperature, the fan is turned on and starts cooling. If the current set temperature is greater than the actual temperature, the heating ring is turned on and starts heating. By repeating this cycle, the plastic particles inside the screw of the blown film machine are molten at a relatively stable temperature and flow quickly in a molten state.
  • A73.

    Due to the production environment of the blown film machine and the defects of plastic particles itself during the film production, many impurities will reach the produced film along the runner, bringing in some impurities such as crystal spots, coke particles, black spots, etc. Therefore, the blown film machine filters impurities by adding a three-way filter, which increases the controllable reflux of the screw, enhances plasticization, and ensures the transparency of the film. There are three modes and structures of the three-way screen exchanger.

     

    Manual screen exchangeThe manual screen exchange is a traditional way of exchanging screens. It needs to remove 8-10 screws from the place where the screw and the mold are connected, and remove the “top of the main machine” when the blown film machine is shut down, and then exchange the filter inside. To use this method, we need to stop the machine before replacing the filter. It will waste a lot of time to stop and start the blown film machine. Also, debugging the machine again will waste a lot of plastic and increase production costs, resulting in low production efficiency.

     

    Manual quick screen exchangeThe manual quick screen exchange is an alternative to the above method. It allows us to replace the filter screen without shutting down the blown film machine. There are two filter screen ports, allowing the operator to change the filter screen at one port while the other is working. When you need to change the screen, just press down or raise the handle to change to the other port. The entire process is fast and smooth. The filter screen can be replaced when the blown film machine is working, which saves time and wastes no plastic. It is suitable for screws with a diameter below 75mm.


    Hydraulic automatic screen exchangerSimilar to the manual quick screen exchange, the hydraulic automatic screen exchanger has two filter ports, allowing the operator to exchange the filter screen at one port when the other is working. When we need to change the screen, just click the screen exchange button, and the screen will be hydraulically pushed to the exchange port. The screen exchanging action is completed rapidly without shutting off the blown film machine or any manual effort. Therefore it is suitable for screws with a larger diameter above 75mm.

  • A74.

    The surface treatment of the screw of the blown film machine is divided into three types:

    Most of the blown film machine screws are made of nitrided steel 38CrMoAIA. The strength of nitrided steel is 85-90kgf/m㎡. It has sufficient central strength as the screw of the blown film machine. However, the wear resistance and corrosion resistance of its surface are insufficient, which needs to be improved in the following ways.

     

    1、Nitriding treatment: Combine ions with the surface alloy by means of salt bath liquid nitriding, gas nitriding, or ion nitriding, to obtain aluminum nitride with the surface hardness of HV1000-1100, which greatly improves the wear resistance of the screw surface.

     

    Since the output of blown film machines has been increased in recent years, the rotating speed and the internal pressure of the screw are increased, and more importantly a large amount of filler materials are needed. The 0.5mm-thick nitride layer of the nitrided screw destroys the stable operation of the screw under high-speed wear and corrosion.

     

    2、Alloy spraying treatment

    The alloy spraying of the screw means spraying a special alloy layer of 0.5-0.8mm on the nitrided screw. After being treated, the wear resistance and load bearing capability of the screw will be further strengthened. It has a certain degree of corrosion resistance to corrosive particles.



    3、Double alloy layer treatment

    The most reliable screw of the blown film machine on the market nowadays is the double alloy screw. The base material of the screw is the SKD161 alloy. The surface of the screw is pressed with a 3mm-thick wear-resistant and corrosion-resistant alloy layer, which is bound by metallurgical methods and is therefore difficult to fall off. Then an alloy layer is sprayed on its surface. It delivers outstanding performance both in corrosion resistance and wear resistance for the long-term operation of the blown film machine. The life of the bi-alloy screw is 3-5 times that of the ordinary screw.


  • A75.

    The screw is partitioned into: the unloading zone, the compaction zone, and the mixing zone.

    The barrel is partitioned into: the blanking seat (inner water jacket) and the barrel.


  • A76. The screw and the barrel of the blown film machine are mainly responsible for squeezing the plastic particles from the barrel into the mold of the blown film machine, then melting and pushing forward plastic particles under the action of the ever-forward pressure and the barrel’s heating ring.
  • A77. The main raw materials of the blown film machine: low-pressure polyethylene HPPE, high-pressure polyethylene LDPE, linear polyethylene LLDPE and other plastic particles. Nylon, EVA, metallocene and other materials will be added for some plastic films with special properties.
  • A78.

    Steps to normally start the blown film machine:

     

    1、Heat the extruder body, die head, and maintain the temperature of each point within the target range.

    2、If you start the machine after a long stop, the heating temperature of each point needs to be kept constant for 10-30 minutes after reaching the target range. This process is not required if the restart is within 30 minutes after the stop.

    3、Start the air compressor and stop it when the cylinder pressure is 6-8kg/cm.

    4、After the temperature of each point meets the requirements, put on labor protection supplies and start the tractor, blower, and extruder in order.

    5、When the discharge from the die is uniform, you may wear gloves and slowly pull up the tube blank. Meanwhile you may seal the end of the tube blank and slightly open the air inlet regulating valve to blow a small volume of compressed air from the center hole of the mandrel, then carefully guide it through the foam stabilizer, the herringbone plate, and penetrate through the traction roller and the guide roller until it reaches the winder.

    6、Check the thickness and width of different parts of the film, and adjust them until they meet specifications

  • A79. The blown film machine melts different plastic particles according to the formula in alignment with the final product, and then blows them into a film. The films produced by a blown film machine are suitable for various kinds of high-end packaging. The films are also widely suitable for heavy and light packaging for their sound barrier properties, freshness preservation, moisture prevention, frost prevention, oxygen barrier properties, and oil resistance, including various kinds of fresh fruits, meat products, pickles, fresh milk, liquid beverages, medical supplies, etc.
  • A80.

    The blown film machine is a machine that melts plastic particles through a screw, and then blows the melted flowing plastic into a film through a specific mold.

  • A81.

    A blown film machine is mainly composed of the following parts:

    1.Basic main machine (gear box, electrical motor, lower hopper, barrel screw, heating ring, head flange, frame, etc.)

    2.Traction auxiliary machine (upper traction roller, traction motor, herringbone plate, traction bracket, guide roller, etc.)

    3.Winding machine (middle traction roller, traction motor, cutting knife holder, winding roller, winding shaft, etc.)

    4.Blow molding die head (die head, heater,)

    5.Cooling device (cooling air ring, cooling fan, surface cooler, cooling air pipe, etc.)

    6. Electrical control system (power distribution cabinet of main machine, including the automatic temperature control, the power distribution cabinet of auxiliary machine and the power distribution device for mold temperature control, etc.)

  • A82.

    Our factory fully implements the ISO9001:2015 quality management system and has passed the TUV certification, which covers the design, production, and delivery. Our purpose is to ensure the quality and safety of blown film machines from the source.

    If you are a global customer who wants to buy a blown film machine, the safety requirements of different countries will take you aback. We have the most widely recognized Swiss SGS certification and EU safety CE certification, which can meet the safety requirements of most countries in the world, thus removing every obstacle for you to place orders.

  • A83. As of December 2019, our blown film machines had been sold to 93 countries around the world, mainly including China, Europe, the Middle East, Southeast Asian countries, the United States, Canada and Latin American countries. Boasting a wealth of logistics and freight experience, we can give you full support or advice on freight duties and logistics costs while ensuring the safe arrival of blown film machines.
  • A84. The production of a blown film machine usually takes about 30 to 60 working days, depending on the size and configuration of the machine. Our factory implements customized production of blown film machines, and an accurate delivery date will be agreed upon during the negotiation process.
  • A85. All our blown film machines have a one-year warranty, starting from the date when the blown film machine arrives at your factory and completes commissioning. During this period, we will provide a fully free warranty for the whole machine, except consumables.
  • A86. Of course you can. We are a professional blown film machine manufacturer in China, and we welcome you to visit us at any time. We will pick you up at Wenzhou Longwan Airport or Rui’an Railway Station. If you want to see the blown film machine you are interested in during your stay, you can also make an appointment with our sales specialist. We will show you the operation of the blown film machine to make your journey more fruitful.
  • A87. Our factory is located in Songqiao Industrial Zone, Sunlou, No. 104 National Road, Wanquan Town, Pingyang County, Wenzhou City, Zhejiang Province, China. You can take a plane to Wenzhou Longwan Airport or take a train to Rui’an Station. Please make an appointment with our sales specialist in advance, and our driver will pick you up at the station when you arrive.
  • A88. Yes, although most of our blown film machines are customized, they are all independently designed before being put into production. Each blown film machine is accompanied by an operation manual and electrical schematic diagram, both in Chinese and English.
  • A89. When our blown film machines arrive at your factory, our engineers will arrive at your factory before the appointed time. They will assemble and debug the blown film machines according to the factory environment. When the machines can operate normally, they will start to train your staff on the operation, production, and routine maintenance of the blown film machines according to the equipment properties, so as to make sure that your employees are competent enough to operate the blown film machines.
  • A90.

    We will remotely communicate with you via video to tell you how to solve technical problems of blown film machines. If the problem cannot be solved, we will consider sending an engineer to your site.

    If the damaged part (non-consumable part) is within the warranty period, we will provide you with another one free of charge, with the transportation charges paid by our factory.

  • A91. We will start production when we receive a 30% deposit of the full order price. After we complete the production within the delivery period and receive the 70% final payment, we will send you the images and videos of the blown film machines being packaged and shipped.
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