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Outdoor Bamboo Decking Cupping

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  • Problems Solves Detail

Exposed to moisture for an extended period of time, bamboo flooring products can absorb moisture and weaken. Because bamboo is grass, the grain runs the length of the board. Inferior or inappropriate bamboo selection, the use of bamboo that is either harvested too young or not properly dried can be prone to changes in temperature and humidity. This can lead to cupping, warping and swelling of the material.


Reason 


1. Uneven distribution of floor moisture content


2. The floor is slotted on one side and not slotted on the other. The two sides of the floor are not the same as the air contact area, and the degree of water absorption is different, resulting in different moisture content on both sides of the floor.

In the case of high air humidity, there is less water in the air without the slotting side, and the side of the back slot absorbs more water in the air, expanding the face surface of the back slot, but the surface of the plane does not expand, so the floor will bend like that of the plane.

In the case of air drying, on the contrary, the board will bend like a slotted side.

warp flooringwarp board

Solutions

1. In production:

When health balance, drying should not be too fast, drying kiln to keep the temperature uniform;

Try to make sure that both sides of the floor have the same texture

2. How to avoid before installation

Proper expansion joints reserved for paving

3. After installation

Because the weather humidity changes with the season, you can see if the floor will recover in a few months. If it is still tile, you can only replace the floor

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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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