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Hardwood Flooring Standard

Standard Specification for Hardwood Flooring,Hardwood Flooring Appearance, Hardwood Flooring Quality Requirements.

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CFI QUALITY CONTROL STANDARD: HARDWOOD FLOORING

SCOPE

This standard specifies the requirements of bamboo floor, test methods, inspection rule and packaging, transportation with marks and storage requirements.



TECHNICAL REQUIREMENTS

Length: Absolute value of the difference between nominal length and every measured value ≤1  

Width: Absolute value of the difference between nominal width and average width ≤ 0.30, the difference between maximum width and minimum width ≤0.30

Thickness: Absolute value of the difference between nominal thickness and average thickness≤0.30;  the difference between maximum thickness and minimum thickness

Tenon thickness: 0.1~0.4

Warp: Convex warp in width direction≤0.20%,, concave warp in width direction ≤0.15%;Convex warp in extending direction≤1.00%,, concave warp in extending direction ≤0.50%

Gap: maximum value≤0.4mm

Height difference: maximum value≤0.3mm


 

The appearance quality requirements

Item

Surface

Back face

Superior

First-class

Qualified

Sound knots

φ≤10mm            Length500mm,

number5;

Length500mm,

number10

10mm≤φ≤25mm,  

Length500mm,

number5;   

Length500mm, number10

φ≤25mm     Unlimited number

Unlimited dimensions

and number

Dead knots

 Not allowed

φ≤3mm    Length500mm, number3;   Length500mm,

number5

φ≤5mm   Unlimited number

φ≤20mm  Unlimited number

Worm holes

Not allowed

φ≤0.5mm,quantity 5

φ≤2mm,number 5

Unlimited

Resin pocket

  Not allowed

length5mm,

width1mm, 

number  2

Unlimited

Pith flecks

Not allowed

Unlimited

Unlimited

Decay

Not allowed

The decay is at initial stage and the decayed area 20%, with no peeling problems or powder

Wane

Not allowed

Length 30% the length of flooring Width 20% the width of flooring

Split

Not allowed

Width0.15mm, length2% the length of flooring

Unlimited

Processed snaking

Not allowed

Not obvious

 Not obvious

 

Tenon deformity

Not allowed

the length of deformed tenon 15% the length of floor,the width of deformed tenon 2/3 the width of tenon

Scratches

Not allowed

Not obvious

 

Blister

Not allowed

 

Exposed undercoat

Not allowed

 

Pin holes

 

The diameter 0.5mm,number3

 

 

Wrinkling

Not allowed

 

Nib

 Length500mm, number3;  

Length500mm, number 4

 Nib on the bevel is not counted in

 Length500mm,

 number 4;

 Length500mm, number6

 

Note1: For a man with normal eyesight, under natural lighting conditions, it is hard to make it out through bare eyes at a distance of 0.4m.

Note2: The length of deformed tenon is the cumulative length of the deformed tenon

 

 the physical and chemical performance requirements

Item

Technical requirements

Superior

First-class

Qualified

Water content

7.0water contentaverage water content in various districts in China

The difference between maximum and minimum average water content of the same batch of flooring board samples shall not exceed 4.0, and the difference between maximum and minimum water content in the same flooring board shall not exceed 4.0 either.

Abrasion resistance

0.08g/100r

0.10g/100r

0.15g/100r

The paint film is not grinded through

Film adhesion

1Grade

2Grade

3Grade

Paint film hardness

2H

H

 

The packing

Packaging: 

By agreement between buyer and supplier, the flooring shall be packed according to the flooring type, specification and grade, individually. The package shall be moisture resistant.


Marking

The package shall be clearly marked with the following information as a minimum: name of manufacturer or supplier; trade name; dimensions; wood variety; date of production and/or batch number; quality of flooring and/or covered surface

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1.  Appearance & Quality Requirements Defects Items Standard Defects, fissures, wrinkles, holes Not allowed (a)Offset printing, delamination, peeling Not allowed (b)Spots, bubbles, scratches, discoloration etc. Not obviously (a) is suitable for heterogeneous floor (b) can be agreed according to the contract between the supplier and the buyer   Item Superior product Qualified product Frosting mark and water mark Not allowed  ≥ 3% the area of the board Scratches Not allowed Press mark Not allowed Previous spots of impregnated paper Not allowed Gloss unevenness Not allowed  ≥ 3% the area of the board Spots,dirt and similar surface defects Not allowed ≤ 10mm², 每米长允许一个allowable 1pc/m Blister Not allowed Bubble Not allowed Tearing of impregnated paper Not allowed Bare substrate spots due to defective surface covering Not allowed Fissure on the surface Not allowed Delamination Not allowed Tongue and corner deformity Not allowed   2. Size And Deviation Length  ≤ 0.1% of length Width ≤ 0.2mm, the difference between the maximum and minimum values ≤0.1 mm mm +0.13mm to -0.10mm,最大值与最小值绝对值不超过(maximum variation)≤0.1mm Straight Angle qmax≤0.20mm straightness smax≤0.20mm Height difference average value ≤ 0.10mm, Hmax ≤ 0.15mm Gap average value≤ 0.07 mm, Gmax ≤0.1 mm Model of click 应与确认的钢模相同should be the same as the confirmed steel model   3. Physical And Chemical Performance Requirements Gloss matte (3~10)±2° semi-matte (15~25)±2° glossy 25以上(more than 25)±2° Tensile Strenght 5cm/120N: 4.0mm≥100N 5.0mm≥120N Ply Adhesion 60N/5cm Curl after 6hrs at 80℃ Laboratory Oven for 6hrs&80℃ then measure with a Vernier: ≤1mm Dimensional Stability Laboratory Oven for 6hrs&80℃ then measure with a Vernier:≤0.1% Dimensional changes after heating WPC 65℃≤0.2%,SPC 80℃≤0.1% abrasion resistance  ≥0.015g/1000转(r) Abrasion resistance Paint film scriber ≥4B Surface scratch resistance Surface decorative pattern is not scratched under 4.0N's force. Indentation ≤0.05mm Formaldehyde release  No Formaldehyde Bibulous rate ≤3%     Packing Product Mark Before the products are stored, they should be tagged in proper parts with their product models, trademarks, production dates, etc.   Packing Mark The standard codes , factory name, address, product name, production date, trademarks, specifications, formaldehyde release sign, type, grade, quantity, etc.   Package A product shall be packed based on its category, specification and grade. The enterprises shall provide detailed instruction books and manuals according to the characteristics of a product. The package shall protect products from being hit,scratched or stained. Packing requirements shall only be settled after negotiation between two parties.

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