| No. |
Test Item |
Standard Index |
Test Value |
Single Item Determination |
| High-class |
Qualified Class |
| 1 |
Appearance Quality |
Vestige |
Indistinct |
Indistinct |
Indistinct |
High-class |
| Coating omit |
Not allowed |
Not allowed |
no |
High-class |
| Ripples |
Not allowed |
Indistinct |
no |
High-class |
| Rubbles(V/10mm) |
Not allowed |
≤1/㎡ |
no |
High-class |
| Flaw(V/3mm) |
≤3/㎡ |
≤10/㎡ |
no |
High-class |
| Abrasion |
Not allowed |
≤100mm/㎡ |
no |
High-class |
| Scratch |
Not allowed |
≤300mm2/㎡ |
no |
High-class |
| Total number of abrasion and scratch |
Not allowed |
≤4 |
0 |
High-class |
| Aberration |
Indistinct |
Indistinct |
Indistinct |
High-class |
| 2 |
Dimensions Deviation |
Length |
±4mm |
+0.2mm～+2.1mm |
OK |
| Width |
±2mm |
+0.1mm～+1.1mm |
OK |
| Thickness |
±0.2mm |
+0.02mm～+0.04mm |
OK |
| Squareness |
≤5mm |
1.7mm |
OK |
| Edge unstraightness |
≤1mm/m |
0.15mm/m |
OK |
| Warpage |
≤5mm/m |
1.2mm/m |
OK |
| 3 |
Coating thickness |
min≥25μm |
29μm (average 30μm) |
OK |
| 4 |
Gloss toletance |
≤10 (gloss<70)=≤5 (gloss≥70) |
7.7 (gloss24.4) |
OK |
| 5 |
Pencil hardness |
≥HB |
3H |
OK |
| 6 |
Coating flexibility |
≤2T |
2T |
OK |
| 7 |
Coating adhesive |
No lower than class 1 |
Class 1 |
OK |
| 8 |
Impact resistance |
50kg·cmno depainting, no crack |
50kg·cmno depainting, no crack |
OK |
| 9 |
Grinding |
≥5L/μm |
≥17.7L/μm |
OK |
| 10 |
Boiling water resistance |
No change |
No change |
OK |
| 11 |
Pullute resistance |
≤15% |
2.00% |
OK |
| 12 |
Acid resistance |
No change |
No change |
OK |
| 13 |
Alkaline resistance |
No change |
No change |
OK |
| 14 |
Oil resistance |
No change |
No change |
OK |
| 15 |
Solvent resistance |
No change |
No change |
OK |
| 16 |
Scrub resistance |
No change when≥10000 times |
No change when10000 time |
OK |
| 17 |
Face censity |
specifide ±0.5kg/㎡ |
5.54kg/㎡ |
-- |
| 18 |
Bending strength |
≥100Mpa |
121MPa |
OK |
| 19 |
Benging elastic modulus |
≥2.0×104MPa |
3.2×104MPa |
OK |
| 20 |
Penetrating resistance |
≥9.0KN |
10.1KN |
OK |
| 21 |
Shearing strength |
≥28.0MPa |
32.0MPa |
OK |
| 22 |
180°peel strength |
≥7.0N/mm |
12.63M/mm |
OK |
| 23 |
Temperatrue difference resistance |
No change |
No change |
OK |
| 24 |
Thermal expansion |
≤4.00×10-5℃-1 |
8.9×10-5℃-1 |
OK |
| 25 |
Heat distortion temperature |
≥105℃ |
105.1℃ |
OK |
| 26 |
Resistance salt spray |
≤2 grade |
Class 1 |
OK |
| 27 |
Artificial weathering |
Colour differences |
≤3.0 |
1.13 |
OK |
| Degradation of metallic paint films |
≤ 2 grade |
Class 1 |
OK |
| Others |
0 grade |
Class 0 |
OK |
Production
Production