Multiple Wood Flooring Standards GB/T 18103-2000

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

SCOPE

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: qmax≤0.2mm

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

Name Surface Back face
Superior First class Qualified  
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

duct

not allowed Maximum single length 5mm. and the maximum single width≤1 Unlimited
Decay   not allowed  
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
Split  not allowed 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

Inspection Items Superior First-class Qualified
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
Moisture content 5~14%
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

Product Marks

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.

Package Labels

Factory name, address, production date, production name, wood variety, quantity, anti-dampness, anti-sunlight marks shall be found on the package labels.

Package

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.

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