Normal Thickness | Distance of any point on the upper surface of the veneer that deviates from the light weight straight ruler | |
Veneer length 500 | Veneer length 1000 | |
≤15 | 2.0 | 4.0 |
>15..≤25 | 1.5 | 3.0 |
>25..≤60 | 1.0 | 2.0 |
>60 | 1.0 | 1.5 |
Appearance Quality
Item | Allowed Range |
Swelling | Not Allowed |
Cracking | |
Dead Knot | |
Foreign-body Adhering | |
Insect Hole | |
Rot | |
Contamination | |
Bruising | A few allowed, not effect in usage |
Impression | |
Color-odds and splash | |
Patches per sq.m on surface | ≤3 |
GB Test Item— Before delivery Factory inspection
Test Item | Unit | Standard | Test Method | |
Vertical Bending Strength | Toward A | Mpa | ≥65 | GB/T2634—2008 Test Standard |
Toward B | ≥65 | |||
Vertical Bending modulus of elasticity | Toward A | Gpa | ≥8 | |
Toward B | ≥8 | |||
Compressibility (under 20MPa) | Toward C | % | ≤3 | |
Crev | ≥70 | |||
Impact strength (side test) | Toward A | KJ/㎡ | ≥13 | |
Toward B | ≥13 | |||
Interlaminar shear strength | Mpa | ≥8 | ||
Vertical electric strength (90 ℃ + 2 ℃) | KV/mm | ≥11 | ||
Vertical electric strength (90 ℃ + 2 ℃) | KV | ≥50 | ||
Performance density | g/cm³ | >1.1~1.2 | ||
water content | % | ≤6 | ||
Shrinkage after drying | Toward A | % | ≤0.3 | |
Toward B | ≤0.3 | |||
Toward thickness | ≤3 | |||
Oil absorption | % | ≥8 |