2023-01-11 16:56:34
2022-09-06 10:34:35
2022-09-06 10:30:49
2023-02-15 10:13:32
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 |
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Superior |
First-class |
Qualified |
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Sound knots |
φ≤10mm Length≤500mm, number≤5; Length>500mm, number≤10 |
10mm≤φ≤25mm, Length≤500mm, number≤5; Length>500mm, number≤10 |
φ≤25mm Unlimited number |
Unlimited dimensions and number |
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Dead knots |
Not allowed |
φ≤3mm Length≤500mm, number≤3; Length>500mm, number≤5 |
φ≤5mm Unlimited number |
φ≤20mm Unlimited number |
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Worm holes |
Not allowed |
φ≤0.5mm,quantity ≤5 |
φ≤2mm,number ≤5 |
Unlimited |
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Resin pocket |
Not allowed |
length≤5mm, width≤1mm, number ≤2 |
Unlimited |
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Pith flecks |
Not allowed |
Unlimited |
Unlimited |
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Decay |
Not allowed |
The decay is at initial stage and the decayed area ≤20%, with no peeling problems or powder |
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Wane |
Not allowed |
Length ≤ 30% the length of flooring Width ≤ 20% the width of flooring |
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Split |
Not allowed |
Width≤0.15mm, length≤2% the length of flooring |
Unlimited |
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Processed snaking |
Not allowed |
Not obvious |
Not obvious |
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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 |
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Scratches |
Not allowed |
Not obvious |
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Blister |
Not allowed |
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Exposed undercoat |
Not allowed |
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Pin holes |
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The diameter ≤0.5mm,number≤3 |
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Wrinkling |
Not allowed |
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Nib |
Length≤500mm, number≤3; Length>500mm, number ≤4 Nib on the bevel is not counted in |
Length≤500mm, number ≤4; Length>500mm, number≤6 |
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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 |
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Superior |
First-class |
Qualified |
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Water content |
7.0≤water content≤average water content in various districts in China |
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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. |
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Abrasion resistance |
≤0.08g/100r |
≤0.10g/100r |
≤0.15g/100r |
The paint film is not grinded through |
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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