White polyester film is used for solar battery back materials.

Properties		Units	Typical Values			Methods
Thickness	TD	μm	125	188	250	DIN53370
Tensile Strength	MD	N/mm²	165	150	150	ASTM D882
Tensile Strength	TD	N/mm²	200	210	215	ASTM D882
Elongation	MD	%	135	140	160	ASTM D882
Elongation	TD	%	96	98	110	ASTM D882
E Module	MD	N/mm²	/	/	/	ASTM D882
E Module	TD	N/mm²	/	/	/	ASTM D882
Light transmittance	TD	%	92	99	100	ASTM D1003
Haze	TD	%	65	58	53	ASTM D1003
Heat shrinkage 150℃/30min	MD	%	1.0	1.0	1.0	BMSTT11
Heat shrinkage 150℃/30min	TD	%	0	-0.1	-0.1	BMSTT11
Wetting tension	TD	mN/m	58	58	58	ASTM D2578
Frequency electric strength		V/um	≥90	≥85	≥70	GB12802.2-2004
Water vapor rate		g/m².24	≥90	≥85	≥70	GB12802.2-2004

许昌睿源绝缘材料有限公司

white polyester film