Flame-retardant multilayer board and preparation method thereof

A flame-retardant, multi-layer board technology, applied in the direction of manufacturing tools, adhesive types, wooden veneer joints, etc., can solve problems such as fast carbonization speed, cracks in the carbonized layer, and increased hygroscopicity, and achieve improved Adhesive performance, improvement of flame retardancy, effect of improving flame retardancy

Inactive Publication Date: 2022-07-05
沭阳县牡丹木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing flame-retardant multilayer boards mainly have the following problems: the flame-retardant effect is not good, when the wood veneer is burned, the layers of the wood veneer are peeled off, the carbonized layer is cracked, and the carbonization speed is fast, usually 0.8-1.3mm / min; Compared with ordinary multilayer boards of the same specifications, the mechanical properties are reduced by 15%-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
However, the multilayer board provided by this patent has low bonding strength, and its flame retardant performance is not considered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of the flame-retardant multilayer board, comprising the following steps:

[0032] (1) Single-layer board pretreatment: Clean the single-layer board, put it into the reaction kettle, then add deionized water to cover the single-layer board, and then add 3% sodium hydroxide of the total mass of deionized water and the total mass of the single-layer board. 1% by mass of silane coupling agent was heated to 80°C and kept for 2 hours, then cooled to -30°C and kept for 2 hours. After repeated heating and cooling 3 times, it was raised to room temperature, taken out and dried to obtain a pretreatment sheet. laminate;

[0033] (2) Vacuum heating impregnation: put the pretreated single-layer board obtained in step (1) into a vacuum pressurized tank, first vacuumize, make the vacuum degree in the vacuum pressurized tank reach 0.1MPa, close the vacuum pump, and introduce The prepared flame retardant solution was kept immersed for 3 hours, and then the veneer w...

Embodiment 2

[0042] A preparation method of the flame-retardant multilayer board, comprising the following steps:

[0043] (1) Single-layer board pretreatment: Clean the single-layer board, put it into the reaction kettle, then add deionized water to cover the single-layer board, and then add 5% sodium hydroxide of the total mass of deionized water and the total mass of the single-layer board. Silane coupling agent of 2% by mass was heated to 90°C and kept for 2 hours, then cooled to -20°C and kept for 2 hours. After repeated heating and cooling 3 times, it was raised to room temperature, taken out and dried to obtain a pretreatment sheet. laminate;

[0044] (2) Vacuum heating impregnation: put the pretreated single-layer board obtained in step (1) into a vacuum pressurized tank, first vacuumize to make the vacuum degree in the vacuum pressurized tank reach 0.2MPa, close the vacuum pump, and introduce The prepared flame retardant solution was kept immersed for 2 hours, and then the veneer...

Embodiment 3

[0053] A preparation method of the flame-retardant multilayer board, comprising the following steps:

[0054] (1) Single-layer board pretreatment: Clean the single-layer board, put it into the reactor, then add deionized water to cover the single-layer board, and then add sodium hydroxide with a total mass of 6% of the deionized water and the total mass of the single-layer board. 3% by mass of silane coupling agent, heated to 100°C and kept for 2h, then cooled to -10°C and kept for 2h, after repeated heating-cooling 3 times, it was raised to room temperature, taken out and dried to obtain a pretreatment sheet. laminate;

[0055] (2) Vacuum heating impregnation: put the pretreated single-layer board obtained in the step (1) into a vacuum pressurized tank, first vacuumize, so that the vacuum degree in the vacuum pressurized tank reaches 0.3MPa, close the vacuum pump, and simultaneously introduce The prepared flame retardant solution was kept immersed for 3 hours, and then the v...

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Abstract

The invention discloses a flame-retardant multilayer board which is formed by compounding at least three layers of single-layer boards into a whole through a flame-retardant adhesive, the thickness of each single-layer board is 3-5mm, and the single-layer boards are pretreated, the flame-retardant adhesive is prepared from the following raw materials in parts by weight: 3-5 parts of aluminum hydroxide, 5-8 parts of ammonium dihydrogen phosphate, 4-8 parts of calcium borate, 4-8 parts of zirconium oxide, 5-10 parts of expansible graphite, 3-7 parts of a silane coupling agent, 15-25 parts of methyl methacrylate, 40-60 parts of epoxy resin, 5-15 parts of acrylic acid and 8-12 parts of acrylamide. According to the preparation method of the flame-retardant multilayer board, the veneer is pretreated, then subjected to vacuum impregnation, then subjected to gluing and hot pressing, and finally subjected to edge cutting and sanding, the preparation process is simple and easy to implement, and the adopted adhesive is environmentally friendly and nontoxic and has high bonding performance, flame retardance and corrosion resistance; and the mechanical property of the wood can be improved, and the good industrial production prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of multi-layer board production, and particularly relates to a flame-retardant multi-layer board and a preparation method thereof. Background technique [0002] Multi-layer board is also called plywood, commonly used are three plywood, five plywood and so on. Plywood can improve the utilization rate of wood and is a main way to save wood. The traditional multi-layer board is a three-layer or multi-layer board material made of wood segments that are cut into veneers or sliced ​​into veneers, and then glued together with adhesives. The fiber directions of the veneers are glued perpendicular to each other. [0003] The existing flame retardant multi-layer boards mainly have the following problems: the flame retardant effect is not good, when the wood veneer is burned, the wood veneer peels off layer by layer, the carbonized layer is cracked, and the carbonization speed is fast, usually 0.8-1.3mm / min; and Com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27D1/08B27D5/00B27K3/08B27K3/10B27K3/52B27K5/04B27G11/00C09J151/08C09J11/04C09J11/06
CPCB27D1/04B27D1/08B27D5/00B27D5/006B27K3/0207B27K3/0214B27K3/08B27K3/10B27K3/52B27K5/04B27G11/00C09J151/08C09J11/04C09J11/06C08K2003/2227C08K2003/321C08K2003/387C08K2003/2244C08K2003/324C08K2201/011C08K3/22C08K3/32C08K3/38C08K5/521C08K7/26C08K13/04
Inventor 刘涛刘冬舒明珠钱监宽周山山
Owner 沭阳县牡丹木业有限公司
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