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Antiflaming plywood or veneer lamination and manufacturing method thereof

A technology of laminated veneer lumber and a manufacturing method, which is applied in the directions of manufacturing tools, joining of wooden veneers, impregnating wood, etc., and can solve the problems of high carbonization speed, increased concentration, and increased smoke hazard.

Active Publication Date: 2011-07-06
固安盛辉阻燃材料有限公司
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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: when it is exposed to 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; In comparison, the mechanical properties are reduced by 15% to 45%; the hygroscopicity increases, which cannot meet the requirements of processing and use; at high temperature, the flame retardant promotes the dehydration and carbonization of wood components into inactive carbon, which leads to the increase of the concentration of carbon monoxide in the smoke and makes the fire Increased hazard of smoke

Method used

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  • Antiflaming plywood or veneer lamination and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0067] A method for manufacturing flame-retardant plywood or laminated veneer lumber, comprising the steps of:

[0068] 1) Add 15 parts of ammonium polyphosphate, 5 parts of ammonium dihydrogen phosphate, and 5 parts of boric acid into 75 parts of water, heat the mixed solution to 45°C-95°C, stir to dissolve, and obtain a flame retardant mixture; The poplar veneer of mm is immersed in the above solution for 20 minutes, taken out, and naturally air-dried to a moisture content of 20wt% to 35wt%;

[0069] 2) Add 10 parts of aluminum sulfate and 4 parts of zinc sulfate to 86 parts of water, stir to dissolve, soak the veneer obtained in step 1 in the solution for 15 minutes, take it out, and let it dry naturally until the water content is 20wt%-50wt%; Then add 10 parts of ammonia water and 0.5 parts of γ-diethylenetriaminopropyltriethoxysilane to 89.5 parts of water, stir and mix well, soak the air-dried veneer in the solution for 35 minutes, take it out, and let it dry naturally u...

Embodiment 2

[0074] A method for manufacturing flame-retardant plywood or laminated veneer lumber, comprising the steps of:

[0075] 1) Add 15 parts of melamine pyrophosphate, 5 parts of ammonium dihydrogen phosphate, and 5 parts of boric acid into 75 parts of water, heat the mixed solution to 45°C-95°C, stir to dissolve, and obtain a transparent liquid, which is the flame retardant mixture solution; soak a poplar veneer with a thickness of 1.7mm in the above solution for 20 minutes, take it out, and let it dry naturally until the water content is 20wt% to 35wt%;

[0076] 2) Add 10 parts of aluminum sulfate and 4 parts of zinc sulfate to 86 parts of water, stir to dissolve, soak the veneer obtained in step 1 in the solution for 15 minutes, take it out, and let it dry naturally until the water content is 20wt%-50wt%; Then add 13 parts of sodium hydroxide and 2 parts of sodium methyl silicate with a content of 40% to 85 parts of water, stir and mix well, soak the air-dried veneer in the solu...

Embodiment 3

[0081] A method for manufacturing flame-retardant plywood or laminated veneer lumber, comprising the steps of:

[0082] 1) Add 18 parts of sodium silicate to 80 parts of water, stir to dissolve, add 2 parts of sodium methyl silicate with a content of 40%, stir to mix, put 3.5mm thick eucalyptus veneer in the solution Soak for 35 minutes, take it out, and let it dry naturally until the moisture content is 20wt%-50wt%; then add 12 parts of zinc sulfate and 3 parts of magnesium chloride to 85 parts of water, stir to dissolve, soak the veneer after drying in it for 45 minutes, take it out , and naturally dry until the moisture content is 20wt% to 50wt%;

[0083] 2) Add 15 parts of ammonium polyphosphate, 5 parts of guanidine phosphate, and 5 parts of borax to 74.5 parts of water, heat to 45°C-95°C, stir to dissolve to obtain a flame retardant mixture, and then add 0.5 parts of vinyl tri Ethoxysilane, stirring and mixing; soak the veneer treated in step 1 in the above solution for...

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Abstract

The invention discloses an antiflaming plywood or a veneer lamination, which comprises a wood veneer, a phosphorus-nitrogen fire retardant, a boron fire retardant, oxide or hydroxide of magnesium, aluminum, calcium, zinc, titanium and barium, and an adhesive, which have over dry weight percentage ratio being 100:2-50:0.2-30:4-40. The antiflaming plywood or the veneer lamination has the characteristics of low carbonization speed, accordance with related standards on physical mechanics property, flame retardant property and smoke toxicity, low formaldehyde emission values, and the like; the invention further discloses a manufacturing method for the antiflaming plywood or the veneer lamination, which comprises the following steps: impregnating the phosphorus-nitrogen fire retardant, the boron fire retardant, the oxide or hydroxide of magnesium, aluminum, calcium, zinc, titanium and barium on the wood veneer, coating the adhesive, and conducting processing of assembling, prepressing, hot pressing, sand polishing and the like.

Description

technical field [0001] The invention relates to a plywood or a laminated veneer, especially one treated with a phosphorus-nitrogen flame retardant, a boron flame retardant, an oxide or hydroxide of magnesium, aluminum, calcium, zinc, titanium or barium The final flame-retardant plywood or laminated veneer lumber and its manufacturing method. Background technique [0002] The plywood currently on the market is a three-layer or multi-layer board-like material that is made of wood segments that are peeled into veneers or sliced ​​into veneers, and then glued with adhesives. The fiber directions of adjacent veneers are glued vertically to each other; while the laminated veneer lumber is a thick veneer cut by rotary cutting, which is assembled in sequence along the direction of the grain, and the ends are mitered, lapped or butt glued. . The preparation of plywood and laminated veneer lumber is made of wood veneer as the main raw material, coated with adhesive, and made through...

Claims

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Application Information

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IPC IPC(8): B27D1/04B27K3/32B27K3/02
Inventor 罗文圣
Owner 固安盛辉阻燃材料有限公司
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