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PVDF PRODUCTS |
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| Applications in photovoltaic field |
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1、Solar cell carriers
The solar cell carriers and accessories based on PVDF(Polyvinylidene fluoride) are designed for square solar cell silicon wafers, with the sizes of 103×103mm, 125×125mm, 150×150mm and 155×155mm. The carriers intended for processing of solar cells can be used in most wet processing systems, and support the suitability for automatic handling and manual handling.
With high rigidity and strength, precise control of dimension and weight, the carries show excellent durations in wet processing systems at a temperature up to 150℃. Based on high purity PVDF, the carriers have no effect on the purity of washing chemicals. Design of the carriers can aviod scratch on the surface of silicon wafers during wet process.
Wafer size，mm |
103×103 |
125×125 |
150×150 |
155×155 |
Capacity，piece |
25 |
25 |
25 |
25 |
Length，mm |
143.5 |
143.5 |
144 |
144 |
Width，mm |
128 |
152 |
179 |
185 |
Height，mm |
123 |
149 |
178 |
184 |
2、Backing sheet for photovoltaic modules
With excellent strength, weather resistance, UV resistance, and moisture barrier properties, the backing sheet is used to protect solar cells of photovoltaic modules.
The product is composed of three laminations(PVDF/PET/PVDF). The outer lamination of PVDF show good resistance to weather and UV, the middle lamination of PET show excellent moisture barrier property, and the inner lamination of PVDF show good adhesion to EVA.
Item |
Unit |
Test Method |
Value |
1、Sheet structure |
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PVDF/PET/PVDF |
Thickness of PET |
μm |
GB/T13541-92 |
250 |
Thickness of fluorine containing lamination |
μm |
GB/T13541-92 |
30 |
Total thickness |
μm |
GB/T13541-92 |
340 |
2、Peel strength |
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EVA/Sheet, normal condition |
N/cm |
ASTM D-1876 180°Peel |
≥40 |
EVA/Sheet, 85℃&85%RH |
N/cm |
ASTM D-1876 180°Peel |
≥40 |
EVA/Sheet, after UV treatment |
N/cm |
ASTM D-1876 180°Peel |
≥40 |
PET/PVDF, normal condition |
N/cm |
ASTM D-1876 180°Peel |
≥6 |
PET/PVDF, boiling water, 24h |
N/cm |
ASTM D-1876 180°Peel |
≥6 |
PET/PVDF, 85℃&85%RH |
N/cm |
ASTM D-1876 180°Peel |
≥5 |
| PET/PVDF, after coolheat cycle |
N/cm |
ASTM D-1876 180°Peel |
≥5 |
PET/PVDF, after vapour freezing |
N/cm |
ASTM D-1876 180°Peel |
≥5 |
PET/PVDF, after UV treatment |
N/cm |
ASTM D-1876 180°Peel |
≥5 |
Sheet/silica gel, 85℃&85%RH |
- |
15Kg/30min |
can not peel off |
| 3thermal shrinkage, MD/TD |
% |
ASTM D-1204，150℃/30min |
≤1 |
4、Thermal weight loss |
% |
GB/T13541-92 |
≤0.25 |
5、Vapour permeation |
gm/m2.day |
ASTM F-1249，38℃/100%RH |
≤3.0 |
6、Disruptive voltage |
KV |
ASTM D-149 |
≥18 |
7、Partial discharge |
VDC |
IEC60664-1 |
≥1000 |
| 8、Yellow index （UV 1000h） |
- |
ASTM E313-05 |
△b≤2 |
9、Tensile strength |
MPa |
ASTM D-882 |
≥40 |
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