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Test Item | Test standard and Method | Test index | |
Impact resistance | GB/T 1732 -1993 | ISO6272 | 50kg·cm |
Adhesion(cross-cut) | GB/T 9286 - 1998 | ISO2409 | Class 0 |
Flexibility | GB/T 6742-1986 | ISO1519 | 2mm |
Pencil hardness | GB/T 6739-1996 | ISO2815 | 1H-2H |
Cupping test | GB/T 9753-1988 | ISO1520 | 6mm |
Salt spray resistance | GB/T 1771-1991 | ISO7253 | >400 Hours |
Heat & humidity resistance | GB/T 1740-1979 | ISO6270 | >500 Hours, film gloss slightly lose |
Note: 1. Above test are using 0.30mm thickness degreased, rust removed cold rolling steel plate, film thickness is 60-80um. 2. Film performance may slightly decrease with gloss decrease. |