EVA film Sheet for Solar EVA Cells Encapsulation 10m x0.81m thickness:0.5mm

EVA film Sheet for Solar EVA Cells Encapsulation

EVA film Sheet for Solar EVA Cells Encapsulation 

10m x0.81m thickness: 0.5mm

Item specifics1. Place of Origin: Guangdong China (Mainland)2. Type: Solar  EVA  film3. Weight: 0.4KG/M4. Width: 810mm5. Length: 10m6. Thickness: 0.5mm7. Color: Transparent / clear 8.Size: 810mm width, THE LEGTH COULD BE CUTTED ACCORDING TO CUSTOMERS REQUIREMENT. EVA Adhesive film Feature:

1. Superior durability - 20 years resistance against weather, high temperature and high humidity

2. Excellent adhesion - 60N/cm when applied to glass for TPT film

3. >91% light transmission

4. Excellent encapsulating properties

5. Film is not adhesive at room temperature to ease manufacturing operations

6. Cross linking and enhanced bonding are achieved when the film is heated and pressed.

 1.  EVA film   

ITEM	UNIT	FAST CURING
VA content	%	30
Melting point(Before cross-linking)	degree	72
Density	g/cm3	0.96
Transmittance	%	≥91
Elongation ratio	—	5.2
Completely Gel content(135degree,20min)	%	70-90
Peeling strength	%	3
UV aging resistance	%	≥95
Temperature resistance(85degree/1000hs)	Glass/EVA N/cm	≥60
	TPT/EVA N/cm	≥73
Shrinkage ratio(120degree,3min)	MD%	<2
	CD%	<1
Shrinkage resistance	Mpa	20

 

2.  EVA film lamination and curing  

 

CONDITIONS		FAST CURING
Lamination	Laminating machine heat board(degree)	100-120	135-140	145
	Vacuumzing time(min)	5-8	5	3
	Pressure time(min)	2-3	15-20	12-15
Curing	Curing oven temperaturedegree	135-140	—	—
	Curing time(min)	15-20
Remark	—	Two steps	One step	One step

 Laminating Steps   1.  Laminating: laminate the glass, EVA film, connected silicon cells, EVA film, TPT backsheet foil in sequence. 2.  Vacuum pumping: Place above laminated pieces into the lower room of the double-vacuum press.  Then the upper room and the lower room are vacuumed synchronously about 6min. 3.  Heating: the upper room and the lower room are kept vacuum, meanwhile heat the laminated pieces. 4.  Press: Laminated pieces are heated under 135°C-140°C conditions, the upper room cancel vacuum and get back to atmospheric pressure.  At that time the lower room is still kept vacuum, that is to say, the upper room press on the laminated pieces of the lower room. 5.  Curing: Isothermal curing under the curing temperature.  6.  Cooling and framing: After isothermal curing, cancel the vacuum of the lower room, open the top of the press, and take out the laminated modules.  Then cut off the extra EVA of composite lamination edge.  Moreover seal frame and equip the termainal box, assemble PV modules at last. 

EVA film Sheet for Solar EVA Cells Encapsulation 10m x0.81m thickness:0.5mm