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back sheet HaflonTPT is composed of high-performance fluorine resin(we get it from AGC in Japan) and strong PET film(with UL standard)by special technology. We call the TPT as our HAFLON FPF, which has acquired certificates from various international industrial associations such as TUV and ROHS for it has completely met the demands of solar module components standard. In the experiments of weather resistance--irradiated by 2.5million LY(equal to 25years' use), our FPF can keep shiny at more than 80%. Haflon FPF have been well applied to hundreds of well-know enterprises in the world. HAFLON FPF/TPT SPECSCharacteristicStandardUnitValueValueValueModelHF200HF300HF350Material ComposF-P-FF-P-FF-P-FColorGB/T2035white/blackwhite/blackwhite/blackThicknessGB/T6672-2001mm0.20.30.35Max BreadthGB/T6672-2001mm200020002000Unit Weightg/m2300440510Technical ParameterIndexTensile-strengthPortraitGB/T1040.3-2006N/CM252378441LandscapeGB/T1040.3-2006N/CM256384448ElongationPortraitGB/T1040.3-2006%130130130LandscapeGB/T1040.3-2006%636363Dimensional StablilityPortraitGB/T10003-1996%≤ 2.0≤ 2.0≤ 2.0LandscapeGB/T10003-1996%≤ 0.5≤ 0.5≤ 0.5EVA-Peel StrengthGB/T8808-1988(N/cm)≥ 30≥ 30≥ 30Peel Strength of LayersGB/T8808-1998(N/cm)UnpeelableUnpeelableUnpeelablePermeability of Water VapourGB/T1037-1988(g/m224h)≤ 2.0≤ 2.0≤ 2.0Max System VoltageIEC61730VDC71510711208