Multiple Wood Flooring Standards GB/T 18103-2000
Standard Specification for Engineered Wood Flooring , Engineered Wood Flooring Appearance, Engineered Wood Flooring Quality Requirements.
QUALITY CONTROL STANDARD-ENGINEERED WOOD FLOORING
This standard specifies the definition, category, technical requirements, testing manners,rules of inspection, marks, package, transportation and storage of Parquet flooring.
Size and Deviation
Thickness difference: The absolute value of the difference between nominal thickness tn and average thickness ta shall ≤0.5mm；The maximum thickness tmax and minimum thickness tmin shall ≤0.5mm
Difference of clear width of the surface layer: The absolute value of the difference between nominal width and average width shall shall ≤0.1mm; The difference between maximum width and minimum width shall≤0.2mm
Difference of clear length of the surface layer: Nominal length ln≤1500mm, the absolute value of the difference between ln and every measured lm shall ≤1.0mm. Nominal length ≥ 1500mm, the absolute value of the difference between ln and every measured lm shall ≤2.0mm
Straightness of the edges: smax≤0.3mm/m
Warp: Convex warp fw in width direction shall ≤0.20%; concave warp fw shall ≤0.15% .Convex warp fl in length direction shall≤1.00%;concave warp fl≤0.50%
Assembled gap: Average assembled gap oa≤0.15mm. Maximum assembled gap omax≤0.20mm
Assembled high difference: Average assembled high difference ha≤0.10mm. Maximum Assembled high difference hmax≤0.15mm
The Appearance Quality Requirements
|Dead knot||not allowed||Maximum single diameter 2mm||Maximum single diameter 4 mm||Maximum single diameter 50mm|
|Holes(include)||not allowed||needs repair work||Maximum single diameter 15mm|
|Light bark pocket||not allowed||Maximum single length 20mm||Maximum single length 30mm||Unlimited|
|Maximum single width 2mm||Maximum single width 4mm|
|Resin pocket and resin
|not allowed||Maximum single length 5mm. and the maximum single width≤1||Unlimited|
|Color variation||not allowed||≤the area of flooring board 5%, the gloss of surface shall be harmonious||≤ the area of flooring board 20%, the gloss of surface shall be generally harmonious||Unlimited|
|Assembled gap||Transverse splicing||Maximum single width 0.1mm||Maximum single width 0.2mm||Maximum single width0.5mm||Unlimited|
|Maximum single length shall ≤the length of board 5%||Maximum single length shall ≤ the length of board 10%||Maximum single length shall ≤ the length of board 20%|
|Longitudinal splicing||Maximum single width 0.1mm||Maximum single width 0.2mm||Maximum single width 0.5mm|
|Folded layers||not allowed||Unlimited|
|Blister, layering||not allowed|
|Dent, press mark,bubbling||not allowed||it is allowed if not too obvious||it is allowed if not too obvious||Unlimited|
|Use of repair bar or patch||not allowed||Unlimited|
|Burr mark||not allowed||Unlimited|
|Infiltration of glue, surface contamination||not allowed||≤1% of flooring area||Unlimited|
|Knife marks, scratches||not allowed||Unlimited|
|Cutted and chatter mark||not allowed||it is allowed if not too obvious|
|Knife marks, scratches||not allowed||Unlimited|
|Losses of edges and sides||not allowed|
|Blister of coating||not allowed||≤3 pcs on each floor board|
|Pin hole||not allowed||≤3 pcs on each floor board|
|Wrinkling||not allowed||≤ area of flooring 5%|
|Fib||not allowed||it is allowed if not too obvious|
|Exposed undercoat||not allowed|
*) Initial decay is allowed, but no peeling problems or powder shall exist.
**) Losses on the long side shall not exceed 30% the length of the board, and shall not exceed 5mm; Losses on the short side shall ot exceed 20% the width of the board, and shall not exceed 5mm.
Physical and Chemical Performance Requirements
|Dip peeling test||The cumulative unglued length of any glued layer on each side shall not exceed 1/3 the length of the glued layer(3mm or less can be ignored)|
|Modulus of rupture(MOR)||≥30Mpa|
|Modulus of Elasticity(MOE)||≥4000Mpa|
|Adhesion of coating||A few sporadic peeling spots are allowed alongside cutting marks and its surounding intersection area.|
|Wear resistance of surface||≤0.08,and the coating does not grind through||≤0.15,and the coating does not grind through|
|Stain resistance of surface||No stain marks|
|Release of formaldehyde||Category A:≤9mg/100g;Category B:＞9~40mg/100g|
Marks、Package、Transportation and Storage
Before the products are stored, the name of manufacturer, factory address, product name, wood variety, model number, brand, production date and category, grade, spefication and etc shall be marked on proper position.
Factory name, address, production date, production name, wood variety, quantity, anti-dampness, anti-sunlight marks shall be found on the package labels.
When the products leave the factory,they shall be wrapped separately according to their specification and grade, and a detailed Chinese version of installation & maintenance instructions shall be provided based on the characteristics of products.The package shall be able to protect the products from collision, scratches and stains. The requirements for package can be determined after discussion between both parties.
Transportation and Storage
Products shall be piled up tidily during delivery & package process, and free from contamination,dampness rain and direct exposure to sunlight.
Products with different varieties, specifications and grades shall be separately stored, and every stack shall bear its special mark on it.