POE / EVA Solar Film Production Line
A direct extrusion line for low-shrinkage solar cell encapsulation film. The twin screw extruder compounds POE or EVA resin with the additives in line, and USEON supplies the complete production line from feeding to winding.
- POE
- EVA · VA content 25–33%
- Film thickness
- 0.3–0.9mm
- Film width, or 1,250 mm
- 2,500mm
- Output, two line sizes
- 300–500kg/h
- Film shrinkage
- < 3%
Solar cell encapsulation structure
Two film layers hold the cells
A solar module is laminated from glass, encapsulation film, the cells, a second encapsulation film and the back sheet. The film cross-links and cures while the stack is heated and pressed.
The cured layers protect the module from the environment while keeping high light transmittance.
- Glass
- POE / EVA film
- Solar cells
- POE / EVA film
- Back sheet
How the line keeps shrinkage low
Six units, each designed around solar-grade POE and EVA resin.
Continuous gravimetric feeding
Fully automatic and accurate over long runs, and flexible when the recipe changes with market demand or a technical upgrade.
Twin screw direct extrusion
POE / EVA resin and a number of additives are compounded in line. Screw elements and screw profile are designed for the resin: each ingredient is mixed homogeneously while pre-crosslinking is avoided.
Gear pump and T-die
A German-made gear pump feeds the die at constant quantity and stable pressure, in closed loop. The T-die is designed to the rheology of solar-grade resin for stable extrusion at low temperature.
Cooling calender
A special cooling channel keeps the calender surface temperature uniform. The silicone-coated calender removes stress from the film and lowers the shrinkage rate.
Thickness gauge and winding
The in-line thickness tester logs and reports thickness in time. The constant-tension winder is designed to the mechanical nature of the film: less edge waste, a higher rate of finished product.
Control system
From relay to industrial computer. The units run in sync, with mechanical and electrical protection for safer production.
Technical datasheet
Film shrinkage below 3% at a line speed of 5–12 m/min.
| Line type | 600MW EVA/POE Solar Cell Encapsulation Line | 300MW EVA/POE Solar Cell Encapsulation Line |
|---|---|---|
| Raw material | EVA Content: 25–33% / POE | EVA Content: 25–33% / POE |
| Output | 400–500 kg/h | 300–350 kg/h |
| Film in area | 6,000,000 m²/year | 4,320,000 m²/year |
| Encapsulating Capacity | 500MW/year | 300MW/year |
| Line Speed | 5–12 m/min | 5–12 m/min |
| Film Thickness | 0.3–0.9mm | 0.3–0.9mm |
| Film Width | 2500mm | 1250mm / 2500mm |
| Film Roller Dia | 300–400mm | 300–400mm |
Projects
USEON has provided several complete production lines of POE / EVA solar cell encapsulation film to solar cell manufacturers in China.
POE
EVA
Turn-key project
The high quality of POE / EVA film is a combination of production processing and a stable line.
Technical consulting
From the project proposal.
Processing
Process know-how delivered with the line.
Production quality control
Through to the finished film.
Staff training
So your team executes the project with confidence.
Get a quote
Tell us the resin, the film you will sell and the yearly capacity you plan. We quote the complete line, from feeding to winding.
- 01Resin (POE or EVA), film thickness and width
- 02Capacity in MW or m² per year, and line size
- 03Line layout, turn-key scope and quotation
Souder Chen
Head of Compounding Division
With USEON since 2008. Twin screw compounding, devolatilization and recycling lines.