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Preparation method of flame-retardant veneer

A technology of plywood and production method, which is applied in the field of plywood, can solve problems such as fire hazards, and achieve the effects of reducing heat release rate and low formaldehyde release

Inactive Publication Date: 2014-03-12
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plywood and wood are both flammable materials, and there is a fire hazard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method for flame retardant plywood, comprising the steps of:

[0039] 1) Put 1.5mm poplar veneer into the mixed solution of flame retardant and synergist (20 parts of ammonium polyphosphate, 2 parts of 4A molecular sieve, 78 parts of water), take it out after soaking for 2 hours, and balance it under natural conditions Moisture content to 20%, dried in a drying oven to moisture content of 8%;

[0040] 2) Mixed adhesive: take 100 parts of urea-formaldehyde resin, add 20 parts of flour to the urea-formaldehyde resin, add 1 part of ammonium chloride with a concentration of 20%, and mix well to obtain a mixed adhesive;

[0041] 3) Use the above mixed adhesive to sizing the veneer, the sizing amount is 280g / m 2 .

[0042] 4) Carry out blank formation, pre-pressing, hot pressing, trimming, and sanding treatment on the veneer after gluing to obtain a flame-retardant plywood.

Embodiment 2

[0044] A preparation method for flame retardant plywood, comprising the steps of:

[0045] 1) Put the 1.5mm poplar veneer into the mixed solution of flame retardant and synergist (20 parts of ammonium polyphosphate, 4 parts of 4A molecular sieve, 76 parts of water), take it out after soaking for 2 hours, and balance it under natural conditions Moisture content to 20%, dried in a drying oven to moisture content of 8%;

[0046] 2) Mixed adhesive: take 100 parts of urea-formaldehyde resin, add 20 parts of flour to the urea-formaldehyde resin, add 1 part of ammonium chloride with a concentration of 20%, and mix well to obtain a mixed adhesive;

[0047] 3) Use the above mixed adhesive to sizing the veneer, the sizing amount is 280g / m 2 .

[0048] 4) Carry out blank formation, pre-pressing, hot pressing, trimming, and sanding treatment on the veneer after gluing to obtain a flame-retardant plywood.

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PUM

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Abstract

The invention discloses a preparation method of a flame-retardant veneer. The flame-retardant veneer has the characteristics of small heat releasing rate, low formaldehyde releasing quantity and the like. The flame-retardant veneer is prepared in the following steps: soaking a wooden board in an ammonium polyphosphate / molecular sieve solution with a given concentration, drying the board, gluing the board, assembling the board, and thermally pressing the board.

Description

technical field [0001] The invention relates to a plywood, in particular to a method for preparing a flame-retardant plywood treated with a phosphorus-nitrogen flame retardant and a synergist. Background technique [0002] With its good physical and mechanical properties and processing properties, plywood is widely used in furniture, wooden doors, interior decoration and construction industries. After July 1, 2008, the national fire protection system enforced the national standard GB20286 "Requirements and Marking of Flame Retardant Products and Components Combustion Performance in Public Places" in the field of building materials in public places, which greatly promoted the use of flame retardant building materials in public places in my country. Application and development in the field of decoration. Plywood, like wood, is a flammable material that poses a fire hazard. In order to reduce the fire risk of plywood, phosphorus-nitrogen flame retardants are usually used to fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27K3/52B27D1/08
Inventor 王明枝姬海平王晓蒙邢方如李黎
Owner BEIJING FORESTRY UNIVERSITY