GWELL develops a new type of EVA Film Making Machine with high output. It is co-extruded by two or three extruders, with a line speed of 2x13m/min, an automatic winder, and a typical developed stress relief device, which can effectively eliminate the film. Residual stress generated during stretching or other production processes can solve the problem of heat shrinkage of EVA film, and the unique low-temperature extrusion design ensures that materials are fully mixed and plasticized.
GWELL develops a new type of EVA Film Making Machine with high output. It is co-extruded by two extruders, with a line speed of 2x13m/min, an automatic winder, and a typical developed stress relief device, which can effectively eliminate the film. Residual stress generated during stretching or other production processes can solve the problem of heat shrinkage of EVA film, and the unique low-temperature extrusion design ensures that materials are fully mixed and plasticized.
EVA is an ethylene-vinyl acetate copolymer, which is produced by the copolymerization of ethylene (E) and vinyl acetate (VA) and is referred to as EVA, or E/VAC. Compared with polyethylene, EVA has reduced crystallinity and improved flexibility, impact resistance, filler compatibility, and heat sealing performance due to the introduction of vinyl acetate monomer in the molecular chain. Generally speaking, the performance of EVA resin mainly depends on the content of vinyl acetate on the molecular chain. Because the composition ratio can be adjusted to meet different application needs, the higher the content of vinyl acetate (VA content), its transparency, softness and toughness will be relatively improved.
Premium EVA film is known for its outstanding durability, even under harsh weather conditions such as high temperature and high humidity.
Under the right conditions, EVA film has excellent adhesion to solar glass (not standard glass, which has a rough surface). EVA also bonds very well to the backsheet.
EVA is known for its excellent transparency. This means that light transmission is acceptable and doesn’t block too much sunlight trying to reach the solar cell. Today, several manufacturers in Asia use transparent backing, so there is transparency between the cells. This type of module is called a translucent module.
In the solar industry, the most common encapsulation is the use of cross-linkable ethylene vinyl acetate (EVA). With the help of a laminator, the cells are laminated between EVA films in a vacuum, in compression. The process takes place at temperatures up to 150 °C. One of the disadvantages of EVA film is that it is not UV resistant, so a protective front glass is required to shield it from UV rays.
Polymerization methods include high-pressure bulk polymerization (for plastics), solution polymerization (PVC processing aid), emulsion polymerization (adhesive), and suspension polymerization. Emulsion polymerization is used for vinyl acetate (VA) content higher than 30%, and high-pressure bulk polymerization is used for low vinyl acetate content.
The EVA Film Making Machine extrusion production line uses EVA resin (VA content 30-33%) as the base material to produce EVA film for solar photovoltaic cells. This production line can also produce hot-melt adhesive EVA interlayer film by changing the formula and process.
|Extruder Type||Co-extrusion GWS160+GWS160||Co-extrusion GWS180+GWS160||Co-extrusion GWS180+GWS180|
|Raw material||EVA, POE|
|Layers||EVA, POE, EVA/POE/EVA three layers（EPE）|
|Max linear speed||15m/min-18m/min|
|Application||EVA、POE、EPE film for solar encapsulation|
Innovation drives enterprise progress. Relying on the group’s strong technology, equipment strength and innovation spirit, Gwell is committed to the development of high-tech products and the international market. Gwell also actively exchanges and cooperates with world-class scientific research institutions. The new technologies, new processes and new products developed by Gwell are widely used in building materials(PP hollow sheet extrusion machine, PC optic extrusion machine), home appliances(SPC floor extrusion machine), packaging(PET sheet extrusion machine, EVOH film extrusion machine),
medical treatment(PVC rigid sheet extrusion machine), automobiles(TPU film extrusion machine, PVB film extrusion machine), new energy(EVA solar film extrusion machine), aerospace(TPU film extrusion machine), rail transit(waterproof film extrusion machine) and other fields, which are closely related to human life.
International Commercial Terms(Incoterms): FOB, CFR, CIF, EXW.
Terms of Payment: LC, T/T
Delivery date:1-4 months
We are committed to produce sheet,film,board extrusion machine.Sheet extrusion machine includes PET sheet, PP、PS sheet, PLA biodegradeble sheet, PETG sheet extrusion machine, PVC soft sheet, PMMA、GPPS sheet extrusion line and so on.Film extrusion machine includes EVA、POE solar film, PVB film, TPU film, PETG film, ASA film and so on.Board extrusion machine includes PC solid board, PP、PE board ,etc.and other extrusion machine like floor, hollow, waterproof , foaming, non-woven fabric extrusion making machine.
Our Trading capacity is about 1,000 extrusion lines every year,and Gwell has exported to over 60 countries and regions for nearly 15 years.
It will take 1-4 months to produce,which caused by different reqiurements of customers and design for each extrusion line.
Yes,Gwell sale teams will provide specification according to customer’s requirements,meanwhile we can give the technical support to customers. Beacause we are not only sales but also technicians.If you are interested in our extrusion machine,please contact us.
Yes,Gwell is complete set of customized turn-key engineering project which include hardware& software design, technology commissioning and after-sales service.Otherwise we can provide formula support.
The whole extrusion line that we often adopt ocean shipping for saving cost,The nearest port of departure is China Shanghai,but if urgent cases like small spare parts,we will send to customer factory by air. Otherwise you can either use your own assigned shipping agent or our cooperative forwarder.