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EVA Film for Solar Module
The EVA films are based on EVA resin (Ethylene Vinyl
Acetate) with special additives for cross-linking. EVA films are used for solar cell encapsulation in solar module assembly
process.
The required physical properties of EVA are :
Excellent
Adhesion to Glass, Cell, and Backsheet
High
Transmittance
Durability
(Temperature, Heat, Humidity)
Mechanical
Strength
Good Electrical
Insulation
Fast Cure Type EVA Sheet
F303
Standard Cure Type EVA Sheet
F406
F806
Available Thickness
0.3 ~ 0.8mmmm
Width
Customized
Partner
Hangzhou First Hot-Melt Adhesive Film Co., Ltd
Backsheet for Solar Module
Bio-based Backsheets (BioBacksheetTM) for Solar Modules
World 1st Bio-based Backsheets
from Renewable Plant Sources.
Breakthrough Technology to Reduce the Cost per Watt of Solar Modules
by Replacing Petroleum-based Solar Module Components with Durable Bio-based
Components .
A Proprietary Manufacturing
and Materials Process to Enhance the Characteristics of Traditional Bio-based Materials; Turning
them into Robust and Durable Materials for Solar Applications.
BioBacksheetTM for Crystalline Silicon-type Solar Modules
BioBacksheetTM-C ; Standard grade Backsheet
BioBacksheetTM-L ; Premium grade Backsheet
A Substrate (bottom layer) has UL
746B RTI Value of 90CO, and a Coating(top layer) on BioBacksheetTM-L has UL 746B RTI Value of 90CO(or
higher).
A New Version for Thin Film type Solar
Modules with Absolute Moisture Barrier (BioBacksheetTM-A) is currently Under Development.
Any Thickness
within 6 - 10 mil
(152.4 – 254um).
Width up to 50 inch (1,270mm).
BioBacksheetTM-C: Properties
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Material Configuration
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Cellulosic
film with a water resistant coating
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Property
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English
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Metric
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Thickness
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7
mils
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178
µm
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Width
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up
to 50 in
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up
to 1270 mm
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Basis Weight
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0.00375
lb/ft2
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183
g/m2
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Density
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75
lb/ft3
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1.2
g/cm3
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Color
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Natural
light grey. Other Colors are
available by
special order
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Tensile Strength (MD/TD)
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14,000/6,200
psi
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980
/ 434 kg/cm2
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Elongation at Break (MD/TD)
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11.3
% / 9.7 %
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Thermal
Shrinkage (MD/TD) 150oC@30 min
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<1.0%
/ <1.0 %
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Peel Strength of EVA Encapsulant
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Cohesive
Failure only
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Water Vapor Transmission Rate
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0.14
gm/100 in2 day
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2.2
gm/m2 day
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Partial Discharge Voltage
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TBD
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Breakdown
Voltage
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TBD
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Wet HiPot Test (UL 1703)
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PASS
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BioBacksheetTM-L: Properties
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Material Configuration
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Cellulosic
film with a water resistant top layer
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Property
|
English
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Metric
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Thickness
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10
mils
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254
µm
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Width
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up
to 50 in
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up
to 1270 mm
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Basis Weight
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0.00536
lb/ft2
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262
g/m2
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Density
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75
lb/ft3
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1.2
g/cm3
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Color
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Natural
light grey. Other Colors are
available by
special order
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Tensile Strength (MD/TD)
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8,600
/ 7,700 psi
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600
/ 540 kg/cm2
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Elongation at Break (MD/TD)
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5.2%
/ 6.2 %
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Thermal
Shrinkage (MD/TD) 150oC@30 min
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<1.0%
/ <1.0 %
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Peel Strength of EVA Encapsulant
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Cohesive
Failure only
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Water Vapor Transmission Rate
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0.18
gm/100 in2 day (TBD)
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2.9
gm/m2 day (TBD)
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Partial
Discharge Voltage
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TBD
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Breakdown Voltage
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>12,000
Volts (TBD)
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Wet HiPot
Test (UL 1703)
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PASS
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