EVA POE Solar Film Extrusion Line

The EVA Solar Film Line is characterized by its complete automation, allowing for seamless operation without the need for manual intervention, thereby guaranteeing optimal efficiency and productivity. Equipped with state-of-the-art sensors and control systems, the machinery constantly monitors the production process and makes instant adjustments to maintain uniformity and deliver top-notch quality output. Additionally, the machinery boasts a user-friendly interface that simplifies both operation and maintenance tasks.

The EVA Solar Film Line is crafted using top-notch components, like the extruder equipped with a high-torque gearbox and efficient screw design capable of withstanding high melting temperatures and ensuring uniform extrusion. Furthermore, a high-precision die is integrated into the machinery to guarantee films with consistent thickness and width. Additionally, the film cooling system is meticulously designed to efficiently cool the film and prevent any warping or shrinkage.

EVA film extrusion line components

1. All parts can be customized.
2. Extrusion system Customized thread combination structure to ensure high output.
3. The forming system, select sincere molds and adjust product thickness at any time.
4. Three-roller setting bearing, the error is controlled in the micron mirror roll-to-compression molding, independent servo control, and imported roller shaft.
5. Traction winding: nitrile rubber roller traction, multi-station winding.

POE film production line introduction

• China GWELL as a film extrusion line manufacturer, POE has the general characteristics of thermoplastic elastomer, the soft chain curl structure of octene, and the crystalline ethylene chain as a physical cross-linking point, it has both excellent toughness and good processability. The price is low and the relative density is small, so the volume is cheap;
• Excellent heat resistance and cold resistance, wide operating temperature range.
• Good weather resistance and aging resistance. Because there is no unsaturated double bond in the molecular structure of POE plastic, it has excellent aging resistance.
• Oil resistance, compression permanent deformation resistance, and wear resistance are not very good. POE plastics have narrow molecular weight distribution, good fluidity, and good compatibility with polyolefins. Good fluidity can improve the dispersion effect of fillers and also improve the weld line strength of products.

The specific maintenance cycle of high-efficiency EVA solar film machine is as follows

1. Change the gearbox oil every 4000~5000 hours of operation, at least once a year;

2. Bearings, cardan shafts, etc. need to be greased regularly;

3. Check the coaxiality and wear of the rubber pad at the coupling every three months;

4. The oil filter element of the hydraulic system needs to be replaced every six months, and the pressure of the energy storage tank needs to be checked regularly;

5. The temperature control system of the water roller should clean the condenser and scale regularly, and the recommended period is half a year;

6. When the roller and cooling roller are not in use for a long time, they should be coated with anti-rust oil and wrapped with cotton cloth;

7. The traction rubber roller should be cleaned regularly with oil-free detergent, and anti-aging treatment should be done if it is not used for a long time;

8. The high-efficiency EVA solar film machine electric control cabinet should check the components regularly, and replace the aging or poor contact components in time;

9. The temperature is low in winter and the shutdown time is long. Before shutdown, the equipment with water should be drained to prevent the equipment from freezing (cracking).

EVA film machine introduction

EVA film is a high-viscosity film material sheet made of polymer resin (ethylene-vinyl acetate copolymer) as the main raw material, adding special additives, and processing with special equipment. It is also called a modified EVA clip in the industry. Adhesive glass film. Due to the superiority of EVA film in adhesion, durability, optical properties, etc., it is more and more widely used in current components and various optical products.

EVA POE solar film extrusion line introduction

EVA is a thermosetting adhesive film that is used in the middle of laminated glass. EVA and POE encapsulation films are mainly used for the encapsulation of crystalline silicon and some thin-film solar cell modules. Due to the superiority of EVA and POE films in terms of adhesion, durability, and optical properties, they are more and more widely used. Used in current components and various optical products.

The EVA Solar Film Machine is a state-of-the-art machine that is designed to produce high-quality EVA (ethylene-vinyl acetate) solar film. The machine is an essential tool for manufacturers who need to produce solar film for a wide range of applications, including solar panels, photovoltaic modules, and other solar energy products. With its advanced technology and superior performance, the EVA Solar Film Machine is an excellent investment for manufacturers looking to produce high-quality solar film with precision and consistency.

One of the key attributes of the EVA Solar Film Machine is its ability to produce solar film with exceptional transparency and adhesion. The machine is designed to extrude EVA resin with a high degree of precision, resulting in solar film that has excellent transparency and adhesion. This makes them ideal for applications where visibility is critical, such as solar panels and photovoltaic modules.

Another advantage of the EVA Solar Film Machine is its ability to produce solar film with excellent heat resistance. EVA solar film is known for its exceptional heat resistance, making it an ideal material for use in solar energy applications. The machine is designed to extrude EVA resin with a high degree of consistency, ensuring that each film is produced to the desired thickness and with the desired properties.

The EVA Solar Film Machine is also highly versatile, capable of producing film with a wide range of thicknesses and sizes. This versatility makes it an ideal choice for manufacturers who need to produce a variety of solar film with different specifications.
In addition to its precision and versatility, the EVA Solar Film Machine is also highly efficient. The machine is designed to operate at high speeds, allowing for the production of large quantities of solar film in a short period of time. This high-speed operation reduces manufacturing costs and increases productivity, making it an excellent investment for manufacturers looking to improve their production efficiency.

The EVA Solar Film Machine is also designed with safety in mind. The machine is equipped with a range of safety features such as emergency stop buttons, safety guards, and sensors that prevent accidents and ensure that the machine operates safely and efficiently. This is essential in manufacturing environments where safety is a top priority.

The EVA Solar Film Machine is also designed for easy maintenance and servicing. The machine is constructed from high-quality materials and is designed to withstand the rigors of daily use in a manufacturing environment. It is easy to clean and maintain, and requires minimal downtime for servicing, ensuring that it is always available when needed.

Overall, the EVA Solar Film Machine is an essential tool for manufacturers who need to produce high-quality, high-performance solar film efficiently and reliably. Its precision, versatility, and efficiency make it an ideal choice for a wide range of applications, while its advanced safety features and reliable operation ensure that it is a machine that can be relied on day after day. If you are looking for a high-quality solar film extrusion solution, the EVA Solar Film Machine is the perfect choice.

EVA Solar Encapsulation Film Production Line Technical Parameters

GWELL Machinery has always occupied more than 80% of the market share in the field of EVA photovoltaic film equipment. The company has been deeply involved in the photovoltaic film industry for decades, and the equipment has been designed and optimized for thousands of times. The in-process yield rate and the degree of equipment automation have been widely recognized by various leading companies. In this equipment field, due to the company’s scale advantages and resource advantages, in the field of photovoltaic film, GWELL Machinery is no longer limited to equipment development, and has a very deep understanding of upstream suppliers and downstream customers.

EVA POE Solar Film Extrusion Line Process Flows

Extruder —- Screen changer —– Melt pump —– T-die —— Calender —– Thickness Scanner —-Cooling Bracket —-Cutting Knife —- Haul-off —-Winder

"EVA POE Solar Film Extrusion Line utilizes the casting process for the production of EVA POE solar cell encapsulation film machine. The main raw material used is vinyl acetate copolymer EVA POE, which is imported, along with added plastic additives. These materials are heated, poured, and then extruded to create the film. At room temperature, the film does not stick and is easy to cut. Through thermal cross-linking curing and adhesion-enhancing reactions during hot pressing, a permanent bond and seal are formed. This innovative product is a thermosetting hot melt adhesive film that offers a high level of quality and efficiency in solar cell encapsulation.

Solar cell adhesive film is an essential material used in the encapsulation of solar cells. Through the process of lamination and curing, this adhesive film effectively bonds and seals the solar cells, providing a range of important functions. Firstly, it boasts high light transmittance, allowing sunlight to penetrate and reach the solar cells efficiently. Additionally, it acts as a barrier, preventing water vapor from seeping into the solar cells and causing damage. The film also demonstrates impressive resistance to both high and low temperatures, ensuring the solar cells remain operational in various environmental conditions. Furthermore, it offers protection against harmful ultraviolet light, further safeguarding the solar cells from potential harm. Overall, the solar cell adhesive film serves as a durable and reliable packaging material, crucial for maintaining the stability and efficiency of solar battery components. In the production process of EVA POE film, the casting method is utilized to create the encapsulation film. This production line allows for the simultaneous production of both EVA and POE films, streamlining the manufacturing process.  Moreover, the EPE film, which consists of layers of EVA, POE, and EVA, represents a significant advancement in solar film technology. This three-layer co-extruded film offers superior performance compared to traditional single-layer EVA and POE films. Not only does it enhance the efficiency and durability of solar cell encapsulation, but it also proves to be a cost-effective solution. By combining the strengths of EVA and POE in a three-layer film, the EPE film achieves optimal performance while reducing production costs, making it a highly desirable choice for solar cell encapsulation.

Compared with EVA laminating machine, the most significant advantage of the POE laminating machine is a low water vapor transmission rate and high volume resistivity, which ensures the safety and long-term aging resistance of components in high temperature and high humidity environments, and ensures long-term use of components. Specifically, the superior performance of POE film over the EVA film machine is that the POE film machine is a copolymer of ethylene and octene, which is a saturated aliphatic chain structure with fewer carbon atoms in the molecular chain, showing good weather resistance and UV aging resistance. It has excellent heat and low-temperature resistance, so POE film has better aging resistance than EVA film machines. The low water vapor transmission rate of the POE laminating machine is particularly beneficial for components that need to be protected from moisture in high humidity environments. This feature helps to prevent the degradation of components due to exposure to water vapor, ensuring their long-term reliability and performance. Additionally, the high volume resistivity of the POE film ensures that components are well-insulated and protected from electrical damage in high temperature conditions. Moreover, the unique molecular structure of the POE film, with its saturated aliphatic chain and fewer carbon atoms, provides exceptional resistance to weathering and UV radiation. This means that components laminated with POE film are less likely to degrade or become brittle when exposed to sunlight or other environmental factors. The excellent heat and low-temperature resistance of POE film further enhance its durability and longevity, making it a reliable choice for long-term use in various applications. In conclusion, the advantages of the POE laminating machine, including its low water vapor transmission rate, high volume resistivity, and superior resistance to aging and environmental factors, make it an excellent choice for protecting components in demanding conditions. Its unique molecular structure and exceptional performance characteristics set it apart from EVA film machines, ensuring the longevity and reliability of components over time.

The EVA film production line for photovoltaic cell encapsulation that has been developed is a unique, energy-efficient, highly effective, and cost-efficient extrusion production line. This production line is currently the most popular EVA film extrusion line for photovoltaic cells in China. The equipment used in the production process is state-of-the-art and designed to maximize productivity while minimizing energy consumption. The innovative technology utilized in this production line sets it apart from other similar equipment on the market. With its high efficiency and reliability, this EVA film production line is leading the way in the industry and helping to meet the growing demand for photovoltaic cells in China and beyond.

The EVA photovoltaic film under the EVA POE solar film production line generally requires a thermal shrinkage rate of less than 5% to meet the requirements of battery packaging. Shrinkage limits traditional EVA photovoltaic film extrusion production equipment. Production speed is almost entirely dependent on the extrusion speed of the melt out of the die, resulting in an inability to increase production speed. A breakthrough was made in the high-speed extrusion technology of low-shrinkage EVA photovoltaic film. The developed stress relief device can effectively eliminate the residual stress generated during film stretching and online production, and better solve the problem of thermal shrinkage of EVA film.

The EVA POE solar film extrusion line has undergone several iterations. The structure and debugging process of EVA solar film machines have been polished for decades, forming a mature production system in the photovoltaic industry. China Plastic Extruder Supplier GWELL can provide customers with a full range of customized services for EVA solar film production lines from raw material procurement, formulation consultation, related auxiliary equipment matching, debugging process training, etc.

EVA solar cell adhesive film is used for solar cell packaging. After lamination and curing, it is bonded and sealed. It has the functions of high light transmittance, preventing water vapor penetration, high and low-temperature resistance, and anti-ultraviolet light for cell components, ensuring the stability and efficiency of battery modules. It is a durable and reliable packaging material.

EVA POE film production line performance characteristics

1. The drool extruder adopts EVA single screw extrusion, and the screw barrel constant temperature circulating water cooling system solves the technical difficulties of EVA plasticization and non-crosslinking.
2.  The roller body adopts double-sided embossing, and solves the technical difficulty of sticking the film to the roller.
3. The cooling part adopts cooling roller and stress-relieving cooling bed to make the film run smoothly and fully shape, to ensure that the shrinkage rate is less than 3%.
4. The whole line adopts PLC automatic control to realize the operation of man-machine interface.
5.  The production line is equipped with an online quality monitoring and control system to ensure the qualified rate of products.
6. Micro tension winder, the line speed of the whole machine can reach 18m/min

 EVA/POE Solar film extrusion line Advantages

• Global market share reaches 90%, including China, America, India, Turkey, and so on.
• The line speed of the EVA/POE solar film line can reach 18m/min.
• Cooling parts to ensure shrinkage rate is less than 3%.
• The special winder ensures micro tension and realizes automatic relaxation and cutting.
• Comparison and introduction of POE and EVA film, EVA/POE/EVA film
•  The drooling extruder adopts multi-machine co-extrusion POE single-screw extrusion, and the screw barrel constant temperature circulating water cooling system.
• The roller body adopts double-sided embossing.
• The cooling part adopts a cooling roller and stress-relieving cooling bed to make the film run smoothly and entirely shape to ensure that the shrinkage rate is less than 3%.
• The whole line adopts PLC automatic control to realize the operation of the man-machine interface.
• The production line is equipped with an online quality monitoring and control system to ensure the qualification rate of products.
• Development and design of micro-tension winders.

EVA POE solar film extrusion line product advantages

1. High transparency and high adhesion can be applied to various interfaces, including glass, metal, and plastics such as PET.
2. Good durability can resist high temperatures, moisture, ultraviolet rays, and so on.
3. Easy to store. Stored at room temperature, the adhesion of EVA is not affected by humidity and absorbent films.
4. Compared with PVB, it has a stronger sound insulation effect, especially for high-frequency sound effects.
5. Low melting point, easy to flow, suitable for laminating process of various glass, such as patterned glass, tempered glass, curved glass, and so on.

The EVA film production line adopts the casting process to produce EVA solar cell encapsulation film. EVA solar cell film is used for solar cell encapsulation. After the lamination is cured, it is laminated and sealed, which has high light transmittance to the battery components and prevents the penetration of water vapor. , high and low-temperature resistance, anti-ultraviolet, and other functions, to ensure the stable and efficient use of battery components, is a durable and reliable packaging material. EVA packaging film production line is in a monopoly global leading position.

Features of EVA Film Extrusion Line

1. EVA single-screw extruder is used for extrusion, and the barrel constant temperature circulating water cooling system solves the technical problems of EVA plasticization and non-crosslinking.
2. The roller body adopts double-sided embossing, which solves the technical difficulties of the rubber roller.
3. The cooling part adopts cooling rollers and stress-relieving cooling beds so that the film runs smoothly and is completely shaped, and the shrinkage rate is guaranteed to be less than 3%.
4. The whole line adopts PLC automatic control to realize man-machine interface operation.
5. The production line is equipped with an online quality monitoring system to ensure the qualification rate of products.
6. Patented micro-tension winding machine, the line speed of the entire production line can reach 14m/min.
7. Low-temperature precision extrusion technology, stable control at 75°C during the process from extrusion to the film release.
8. It breaks through the limitation of shrinkage rate control on the production line speed; the production line speed can reach 7 m/s, the shrinkage rate can be controlled within 2%, and the production efficiency and quality are doubled.
9. Tempering stress relief devices, saving energy, and reducing consumption by more than 50%.
10. Mature online process and electrical control system to ensure long-term stable operation of the equipment.
11. The procedure is simple and convenient, and the product quality is easier to grasp.
12. This equipment has mature technology and is widely used in the field of solar cells. The production line speed is about 8m/min. The winder can be semi-automatic or fully automatic according to customer requirements. The equipment has been awarded the utility model product, which solves the technical defects and guarantees quality.

Feature of  EVA/POE  Solar film extrusion line

1. Film Layers: Depending on the finished film, there are two types of extruders that can produce EVA or POE film monolayers. The other is co-extrusion. It can not only produce EVA or POE film single layer, but also can produce EVA/POE/EVA three-layer film (EPE film). It will be according to customer’s request.
2. Extruder: A special single-screw extruder for EVA/POE is used, the temperature difference between the screw and barrel is ±1°C, and the circulating water cooling system ensures that the longitudinal thickness of the EVA/POE film is uniform. And better plasticization and non-crosslinking.
3. Screen changer: The advantage of adopting the plate type screen changer is equipped to filter impurities. Compared with the column-type screen changer, the plate-type screen changer has fewer accumulated materials, and fewer materials stored in the screen changer after shutdown and restart, which means less waste. It is convenient to change and clean the screen. It will decrease the cost of the EVA/POE raw material.
4. Melt pump: With higher accuracy, forming closed-loop control with the extruder, and the pressure fluctuation accuracy behind the pump is ± 0.1MPa; The pressure detection sensor, with accurate detection and fast response, which is one of the keys to ensure the event of longitudinal thickness;
5. T-die: there are two kinds of T-die, the one is manual T-die, and the other is automatic T-dies. one of the important differences between them is tolerance. And it can ensure the even of cross side.
6. Calendar: The strength of the roller shall ensure that the temperature fluctuation accuracy of the roller surface is ≤± 1 degree, and the straightness and radial runout of the roller surface is ≤± 0.01mm. The roller body adopts double-sided embossing and solves the technical difficulties of the film sticking to the roller.
7. Cooling part: Dedicated cooling rolls and stress-relieving cooling bed make the film run smoothly, form fully, and ensure that the shrinkage rate is less than 3%.
8. Thickness scanner: To match the automatic T-die.Scan the thickness of the film, and reflect T-die. Then T-die can modify automatically. It can decrease labor costs.
9. Winder: It can decrease the tension and ensure side winding is smooth.
10. Automatic operation: The whole line adopts PLC automatic control to realize the operation of the man-machine interface. It is easy and automatic to operate.

EVA film(Ethylene):

• Because of the application of solar film, EVA film has good durability to resist high temperatures, ultraviolet rays, moisture, and so on.
• EVA film can store at room temperature. Although long time, the adhesion EVA will not change.
• EVA film’s high adhesion can not only adapt to encapsulation but also dressing in the field.

POE film(polyolefin):

In addition to the characteristics of EVA film, the biggest advantages of the POE film produced are low water vapor transmission rate and high volume resistivity, which ensures the safety and long-term aging resistance of the module under high temperature and high humidity environment. Can be used longer than EVA film. Therefore, the performance of POE film is better than that of EVA film.

POE can replace rubber, flexible PVC, EPDM, EPR, EMA, EVA, TPV, SBC, and LDPE, and other materials, used in different products, such as automotive baffles, flexible conduits, conveyor belts, printing cylinders, sports shoes, wire and cable, auto parts, durable goods, extrusion parts, compression molding parts, sealing materials, pipe fittings and fabric coatings, etc., can also be used as a low-temperature impact modifier to improve the low-temperature impact resistance of PP, and can also be used as a low-temperature impact modifier. It is used in the automotive field as a thermoplastic elastomer.

POE can be processed and formed using common thermoplastic processing equipment. The forming processing temperature and processing pressure should generally be slightly higher and can be processed at extremely high processing speeds. It can be injection molded, extruded, or processed into a sheet or film by a calendar, and can be blow molded, and thermoforming can be used to manufacture products with complex shapes. Various pigments can be added to make different colors as needed.

EVA/POE/EVA film:

EVA/POE/EVA film has three layers, including EVA and POE film advantages and lower cost than POE film.

What are the difficulties in the manufacture of EVA photovoltaic film

EVA photovoltaic film is different from other EVA products and puts forward higher requirements for raw materials, processes and equipment.

1. EVA sensitivity to temperature

One of the defining characteristics of EVA raw materials is their high sensitivity to temperature fluctuations. It is crucial to maintain optimal temperatures during the plasticizing process in order to avoid immediate rejection of the products. Temperature control plays a significant role in determining the quality of the final product. GWELL Machinery has developed a specialized screw for EVA to ensure thorough plasticization without the risk of localized overheating. In addition to temperature regulation, the speed of the production line is also a critical factor in product yield. A decade ago, the line speed for EVA photovoltaic film production was limited to a mere 2 meters per minute. However, through continuous optimization efforts, GWELL has managed to increase the production line speed to an impressive 16m/min. This remarkable improvement rivals the capabilities of high-end equipment from Germany and has contributed to GWELL's rise as a leading company in the market over the past decade. The combination of precise temperature control and increased production speed has been instrumental in GWELL's success and solidified its position in the industry.

2. Strict control of winding tension on EVA

Don’t underestimate the influence of the internal stress of EVA photovoltaic film on the quality of photovoltaic film. EVA photovoltaic film is in the hands of downstream module manufacturers. If a film is bulged, the entire module will be scrapped, which is undoubtedly very heavy for module manufacturers. The second reason for this phenomenon is that The internal long force of the EVA film is too large, resulting in excessive stretching. There are strict requirements for the winding tension control of the equipment. The winder of GWELL machinery can strictly control the tension of the product within 20N, which ensures the yield of the product. At the same time, the functions realized by the fully automatic winder developed by GWELL can minimize the waste of products.

EVA, POE photovoltaic film production line

EPE=EVA+POE+EVA is a three-layer co-extruded solar film. Compared with single-layer EVA and POE films, it achieves high performance and saves costs.

General description of the solar film The EVA POE Solar Film Extrusion Line  Machinery Co., Ltd. adopts the casting process to produce EVA POE solar cell encapsulation film. The EVA film production line can also produce POE film at the same time, realizing a dual-purpose machine, and also taking into account the three-layer co-extrusion of EVA, POE, and EVA, which improves the multiple uses of the product and meets the different needs of customers. At present, the main models of film equipment are divided into 160 single machines, 180 single machines, double 160 co-extrusion, double 180 co-extrusion, and 160/180 co-extrusion types.

China GWELL is a high-tech enterprise integrating management, R&D, design, manufacturing, and commissioning. It can provide high-efficiency and high-quality pre-feasibility research, program demonstration, program design, equipment commissioning and acceptance, and equipment operation training service.

In recent years, GWELL has seen a significant increase in the export of its equipment to various countries around the globe. Some of the major destinations for these exports include Russia, Spain, Turkey, Iran, South Korea, and Indonesia. The company prides itself on its ability to tailor its products to meet the specific needs of customers in different industries. By doing so, GWELL is able to create more intelligent and user-friendly products that not only meet but exceed customer expectations. This customization not only enhances the overall user experience but also helps customers in reducing costs and improving efficiency in their operations. Through these export activities, GWELL continues to establish itself as a leading provider of innovative and high-quality equipment on a global scale.

Because of EVA/POE film superior adhesion, durability, and optical characteristics, which is mainly used for

1. China GWELL as film extrusion line manufacturer, EVA glass interlayer film, products are widely used in: deep processing of special glass such as safety flat laminated glass, curved laminated glass, process laminated glass, color-changing laminated glass, conductive smart glass, solar cells and so on.
2. Hot melt adhesive cast film, embossed film, the products are widely used in: Hygiene products: medical surgical gown, baby diaper film, bottom film of women’s sanitary napkin, adult diaper film, pet pad film, disposable bed sheet, etc. .
3. Daily necessities: umbrellas, raincoats, suit jackets, various tablecloths, shower caps, shower curtains, aprons, chair covers, etc.
4. Packaging supplies: dust cover for computer and electrical appliances, soft packaging for cosmetics, shopping bags, gift bags, file bags, etc.