A kind of production method of low-aldehyde flame-retardant plywood

A production method and technology for plywood, applied in the field of plywood, can solve the problems of inability to meet processing and use requirements, increased smoke hazard, poor flame retardant effect, etc., to promote cross-linking curing, stable polymerization reaction rate, and improve water resistance. The effect of resistance and bond strength

Active Publication Date: 2017-08-25
广州皕吉装饰材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing flame-retardant plywood mainly has the following problems: the flame-retardant effect is not good, when it is burned in a fire, the wood veneer peels off layer by layer, the carbonized layer cracks, and the carbonization speed is fast, usually 0.8mm / min-1.3mm / min ; Compared with ordinary plywood of the same specification, the mechanical properties are reduced by 15% to 45%; the hygroscopicity increases, which cannot meet the processing and use requirements; The concentration of the concentration increases, which increases the hazards of the smoke in the fire

Method used

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Effect test

Embodiment l

[0030] A method for producing low-aldehyde flame-retardant plywood, the steps are as follows:

[0031] (1) Wood rotary blades: Rotate the eucalyptus boards with a rotary cutter to obtain veneers, and pick out the unqualified boards with insect eyes, decay, and excessive defects;

[0032] (2) Primary drying: Dry the veneer with a dryer to reduce the moisture content of the board to below 12%;

[0033] (3) Repair: Repair the defects or blemishes on the veneer including natural cracks, cracks, knots, skins and knots;

[0034] (4) Vacuum impregnation treatment: Put the obtained veneer into a vacuum pressurized tank, firstly pump the vacuum to make the relative vacuum in the vacuum pressurized tank reach -0.09~-0.12MPa, keep the vacuum pump for 65 minutes, and at the same time introduce The flame retardant solution has been prepared until the relative vacuum in the vacuum pressurized tank is 0.9 ~ 1.5Mpa, turn on the booster pump, and continue to pass the flame retardant solution ...

Embodiment 2

[0044] A method for producing low-aldehyde flame-retardant plywood, the steps are as follows:

[0045] (1) Wood rotary blades: Rotate the eucalyptus boards with a rotary cutter to obtain veneers, and pick out the unqualified boards with insect eyes, decay, and excessive defects;

[0046] (2) Primary drying: Dry the veneer with a dryer to reduce the moisture content of the board to below 12%;

[0047] (3) Repair: Repair the defects or blemishes on the veneer including natural cracks, cracks, knots, skins and knots;

[0048] (4) Vacuum impregnation treatment: Put the obtained veneer into a vacuum pressurized tank, firstly pump the vacuum to make the relative vacuum degree in the vacuum pressurized tank reach -0.09~-0.12MPa, keep it for 70min, then turn off the vacuum pump, and at the same time introduce The flame retardant solution has been prepared until the relative vacuum in the vacuum pressurized tank is 0.9 ~ 1.5Mpa, turn on the booster pump, and continue to pass the flame...

Embodiment 3

[0058] A method for producing low-aldehyde flame-retardant plywood, the steps are as follows:

[0059] (1) Wood rotary blades: Rotate the eucalyptus boards with a rotary cutter to obtain veneers, and pick out the unqualified boards with insect eyes, decay, and excessive defects;

[0060] (2) Primary drying: Dry the veneer with a dryer to reduce the moisture content of the board to below 12%;

[0061] (3) Repair: Repair the defects or blemishes on the veneer including natural cracks, cracks, knots, skins and knots;

[0062] (4) Vacuum impregnation treatment: Put the obtained veneer into a vacuum pressurized tank, firstly evacuate to make the relative vacuum in the vacuum pressurized tank reach -0.09~-0.12MPa, keep the vacuum pump for 75min, and at the same time introduce The flame retardant solution has been prepared until the relative vacuum in the vacuum pressurized tank is 0.9 ~ 1.5Mpa, turn on the booster pump, and continue to pass the flame retardant solution into the vac...

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Abstract

The invention relates to a plywood, in particular to a production method of a low-aldehyde flame-retardant plywood. The process steps of its production include: plank rotary blade—primary drying—repair—vacuum impregnation treatment—secondary drying—gluing—prepressing—hot pressing—edge trimming and sanding. The invention uses a flame retardant solution to vacuum impregnate the veneer. After the impregnation process, the flame retardant penetrates into the cell cavity, cell wall and intercellular space of the wood to obtain a flame retardant veneer, which is used to produce plywood. The flame retardant performance of the produced plywood has been improved; by improving the urea-formaldehyde resin adhesive used, the residual amount of formaldehyde in the adhesive is reduced, thereby reducing the residual amount of formaldehyde in the plywood; The burning agent borax solution improves the flame retardancy of the urea-formaldehyde resin adhesive used. Using this adhesive to produce plywood not only reduces the residual amount of formaldehyde in the plywood but also further improves the flame retardancy of the plywood.

Description

technical field [0001] The invention relates to a plywood, in particular to a production method of a low-aldehyde flame-retardant plywood. Background technique [0002] Plywood is an important type of wood-based panel. The plywood currently on the market is a three-layer or multi-layer board-like material that is cut into veneers by wood segments or sliced ​​into thin wood by wood squares, and then glued with adhesives. It is usually made of odd-numbered veneers, and the fiber directions of adjacent veneers are glued perpendicular to each other; plywood is widely used in architectural decoration, furniture manufacturing, wooden door manufacturing, Floor manufacturing, marine and vehicle interior finishing. [0003] However, since plywood is a kind of wood material, it has a high combustion calorific value, a low combustion temperature and a fast flame propagation speed. It is a combustible material and there is a fire hazard. Therefore, it is necessary to carry out flame r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/08B32B37/12B32B37/06B32B37/10C09J161/32C09J11/08C08G12/40C08B31/18
Inventor 邓军
Owner 广州皕吉装饰材料有限公司
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