Physical Properties | |||
Item | Instrument | Standard | Test Standard |
Pencil Hardness | Pencil hardness instrument | ≥2H | GB/6739-1996 |
Impact Resistance | Impact testing instrument | ≥40kg.cm | GBT/1732-1993 |
Flexing Endurance | Bending instrument | ≤3mm | GBT/6742-1986 |
Adhesive Bonding | Cross-cut testing instrument | 0 Grade | GBT/9286-1998 |
Chemical Properties | |||
Item | Standard | Result | Test Standard |
Resistance to salt spray | ≥100 Hs | ≥9 Grade | GBT/1771-1991 |
High temperature resistance | 300-600℃(specific temperature as agreed)/1-6 hours (specific time as agreed) | No blistering and peeling, allowing slight color changes | GB1735-2009 |