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Standards > Laminate Flooring |
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APPEARANCE
AC2/AC3/AC4 |
Item |
Requirement |
Defects |
A & Acceptable qualities
|
Front |
Back |
Frost and water marks |
A: Not Allowed
Acceptable：≤ 3% of the surface |
Allowed |
Scratches on the surface |
Not Allowed |
HDF exposed not allowed |
Imprints on the surface |
Not Allowed |
Not Allowed |
Holes |
Not Allowed |
Not Allowed |
Gloss unevenness |
A: Not Allowed
Acceptable：≤3% of the surface |
Allowed |
Spots, dirt and similar
surface defects |
A: Not Allowed
Acceptable：≤10 mm2, max 1/board |
Allowed |
Blisters |
Not Allowed |
Max 1/pc ≤ 10 mm2 |
Humps |
Not Allowed |
Max 1/pc ≤ 10 mm2 |
Defects on decorative paper |
Not Allowed |
Max 1/pc ≤ 100 mm
(on balance paper) |
Missing decorative or
balance paper |
Not Allowed |
Maximum 1/pc ≤ 20 mm2 |
Edge defects |
Allowed if they do not affect aesthetics after installation |
Allowed |
Cracks on the surface |
Not Allowed |
Not Allowed |
Colour not even |
Obvious unevennes not allowed |
Allowed |
Delamination |
Not Allowed |
Not Allowed |
Missing or damaged locking systems or edges/corners |
Not Allowed |
Not Allowed |
DIMENSIONAL TOLERANCES
Item |
Requirement |
| Tolerance in thickness |
≤ 0.5 mm of the actual average thickness
Difference between actual maximum and minimum
thickness ≤0.5 mm |
| Tolerance in length |
If the nominal length is ≤1500 mm, tolerance in length is ≤1 mm
If the nominal length is ＞ 1500 mm, tolerance in length is ≤2 mm |
| Tolerance in width |
≤0.1 mm of the actual average width
Difference between actual maximum and minimum width ≤0.2 mm |
| Squareness |
≤ 0.2 mm |
| Straightness |
≤ 0.3 mm/m |
| Wing warp |
Cup warping concave: Chord ≤ 0.15% of width
Cup warping convex: Chord ≤ 0.2% of width
Bow warping concave: Chord ≤ 0.5% of length
Bow warping convex: Chord ≤ 1% of length |
Space between
connected boards |
Average≤0.15 mm, max≤0.2 mm |
| Height difference between connected boards |
Average≤0.1 mm, max≤0.15 mm |
PHYSICAL AND CHEMICAL PROPERTIES
Tests |
Unit |
A quality |
Bending strength (Modulus of Rupture) |
Mpa |
≥35 |
Internal bond |
Mpa |
≥ 1 |
Board moisture content |
% |
3～10 |
Core board density |
g/cm3 |
≥0.85 |
Thickness swelling 24 hrs |
％ |
≤18 |
Adhesion test |
Mpa |
≥ 1 |
Surface resistance to changes in temperature |
|
No cracks , no blisters |
Surface resistance to scratches |
N |
4 N，decorative paper not scratched |
Dimensional variations after relative humidity changes |
mm |
(≤0.9) |
Surface resistance to cigarette burn |
|
No black spots, no cracks, no blisters |
Surface resistance to heating |
|
No cracks , no blisters |
Surface resistance to stain and rosion |
|
No stain, no erosion |
Surface resistance to cracking |
|
No cracks under 6Xmagnifying glass |
Abrasion class resistance |
cycles |
AC2 - Home useⅡ: ≥4000
AC3 - Home useⅠ: ≥6000
AC4 - Commercial use: ≥9000 |
Impact resistance |
mm |
Maximum: 12 (≤10) |
Formaldehyde emission |
mg/L |
E0 ≤:0.5
E1≤:1.5 |
Colour Fastness |
grade |
≥ grade4 on gray colour card |
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