Description | Test standard | Polyester |
Coating Thickness (μm) | Polyester paint >=16μm | 16μm to 18μm |
Coating flexibility (T-bend) | Polyester paint ≤ 3T | ≤ 3T |
Color different | ΔE<=2.0 (follow color sample) | ΔE<=2.0 |
Pencil hardness | >=HB | >=2H |
Chemical resistance | 2%HCI or 2%NaOH test in 24 hours -No change | No change |
Coating adhesion | >=1grade for 10810mm2 gridding test | 1grade |
Resist solvent | 100 times without change | No change |
Boiling water resistance | 2 hours without change | No change |
Peeling strength/stripping strength | Average >=5N/mm of 180oc peel off for panel with 0.21mm alu.skin | 5N/mm |
Impact test for paint | 20KG.cm impact-paint no split for panel | No split |
Abrasion resistance (L/Mil) | NIL | NIL |
Temperature resistance | -40ºC to +80ºC temperature without change of color difference and paint peel off, peeling strength average dropprate<=10% | Change of glossy only, no paint |
Peel off |
Coefficient of linear Thermal Expansion | 100ºC temperature difference | 2.4mm/n |
Detergent resistance (3%) | ASTM D2248 | No change |
Humidity Resistance (3000hrs,100%RH,100°F) | ASTM D2247 | No change |
Salt spray resistance (3000hrs,5% salt) | ASTM B117 | No change |
Resistance to Staining | 600h radiate in 800W/M2 in humidity condition ,glossiness deviation less grade 2,color difference <=4.0 | No chang |