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Test Item	Test Method	Unit	Standard Value	典型值Typical Value
				SF490 500515SEN	SF490 500515SET	SF490 500515SEX
Peel Strength (90°)	IPC-TM-650,No.2.4.9	N/mm	-	0.31	0.32	0.34
Visible Light Transmittance	Shengyi Method	%	≥90	90.5	90.2	90.1
Pencil hardness	GB/T6739,500g load	-	-	3H	-	2H
Dimensional Stability	Shengyi Method	%	±1	±1	±1	±1
Chemical Resistance	IPC-TM-650,No.2.3.2	%	≥90	＞90	＞90	＞90
Volume Resistivity	IPC-TM-650,No.2.5.17	MΩ-cm	≥106	1.3×108	1.5×108	1.8×108
Surface Resistance	IPC-TM-650,No.2.5.17	MΩ	≥105	4.7×105	4.1×105	3.8×105

Remarks:

*Certified to IPC-4204/5 Polyester adhesive on one or two sides of polyethylene terephthalateFilm and Shengyi standard.