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Strengthening and flame-retardant modified artificial forest wood and preparation method thereof

A plantation and wood technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of insignificant fire retardant effect of wood, complicated modification treatment process, poor dimensional stability of wood, etc., so as to improve the mechanical processing performance, The utilization rate of solid wood is improved and the flame retardant effect is remarkable.

Active Publication Date: 2011-09-28
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned wood modification treatment process is complicated, the treatment time is long, the mechanical properties of the modified wood are poor, the strength is low, the dimensional stability of the wood is poor, and the flame retardant is easy to lose, resulting in the treated wood. Low

Method used

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  • Strengthening and flame-retardant modified artificial forest wood and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Preparation of resin solution

[0047] 1) Prepare raw materials according to the following molar ratio:

[0048] The molar ratio of melamine, formaldehyde, urea and methanol is 1: 2.2: 1: 2.5;

[0049] 2) The first stage of reaction

[0050] Add melamine and formaldehyde into the reaction kettle, stir evenly, add sodium hydroxide (NaOH) solution to adjust the pH value of the mixed solution of melamine and formaldehyde to 9.5, and then heat it to a temperature of 80°C for the first-stage reaction. The reaction time is After 35 minutes, the first-stage reaction solution was prepared. Wherein the mass percentage concentration of sodium hydroxide solution is 20%;

[0051] 3) The second stage of the reaction

[0052] Add methanol, the first batch of urea and NaOH solution in the reactor, make the pH value of the solution in the reactor be 13, and keep the solution temperature in the reactor at 72°C, carry out the second stage reaction, the reaction time is 50 minutes,...

Embodiment 2

[0077] In the process of preparing the resin solution, except that the molar ratio of melamine, formaldehyde, urea, and methanol is 1:2.3:1.1:2.4; the first stage of the reaction: the pH value of the mixed solution of melamine and formaldehyde is 9.3, the reaction temperature is 78°C, and the reaction time For 40 minutes; the second stage of reaction: the reaction temperature is 71 ℃, the reaction time is 55 minutes, the addition of the first batch of urea accounts for 88% of the total urea; the third stage of reaction: the temperature in the reactor is 64 ℃, The pH value of the internal reaction solution is 9.2; the fourth stage of the reaction: the pH value of the solution in the reactor is 7.5, and the reaction temperature is 64°C. When the water mixing ratio of the reaction solution is 6, the reaction is stopped; in the cooling and pH adjustment steps, When the temperature was down to 48°C, NaOH solution was added to the reactor to adjust the pH value to 10.5, and the rest ...

Embodiment 3

[0083] In the process of preparing the resin solution, except that the molar ratio of melamine, formaldehyde, urea and methanol is 1:2.4:1.2:2.6; the first stage of the reaction: the pH value of the mixed solution of melamine and formaldehyde is 9.2, the reaction temperature is 77°C, and the reaction time For 45 minutes; the second stage of reaction: the reaction temperature is 70°C, the reaction time is 60 minutes, and the addition of the first batch of urea accounts for 75% of the total amount of urea; the third stage of reaction: the temperature in the reactor is 62°C. The pH value of the internal reaction solution is 9.0, add the remaining amount of urea, and maintain the temperature of the solution in the reactor to be 62°C; the fourth stage of the reaction: the pH value of the solution in the reactor is 7.3, and the reaction temperature is 62°C. When the water mixing ratio is 6, stop the reaction; in the step of cooling down and adjusting the pH, when the temperature drop...

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Abstract

The invention discloses a strengthening and flame retardant integrated modified processing method for artificial forest wood and modified artificial forest wood prepared thereby. The method adopts a low molecular weight water-solubility melamine modifying urea-formaldehyde resin solution to compound a flame retardant for dipping the artificial forest wood, comprising the following steps: firstly preparing the melamine modifying urea-formaldehyde resin solution; adding borate to the resin solution for preparing a compound modifier for dipping; then dipping the soft artificial forest wood to ensure that the wood fully absorbs the modifier; and finally drying the dipped wood to obtain the strengthened and flame-retardant processed wood. Because the resin is solidified in the wood, the strengthened and flame-retardant processed wood prepared in the method has the advantages of weight increment and enhanced physical properties including density, size stability, rigidity, strength and the like; meanwhile, because the flame retardant contained in the resin can be uniformly distributed and fixed in the wood, and has strong loss resistance, the processed wood has favorable flame resistance. The processed wood can be extensively applied to the industries of architecture, furniture, interior decoration and the like.

Description

technical field [0001] The invention relates to a method for impregnating wood and wood obtained by the method, in particular to a method for pressure-impregnating wood and modified wood obtained by the method. Background technique [0002] In recent years, with the rapid development of my country's economy, the increase of national income and the gradual improvement of people's living standards, the consumption of wood materials for construction and interior decoration has been increasing year by year. At present, the utilization of wood materials in construction and interior decoration exceeds 80 million cubic meters per year. Especially in recent years, the Chinese government has begun to introduce advanced manufacturing technology and equipment for wood structure buildings from developed countries such as Europe, America, and Japan, which has promoted the development of wood structure buildings in my country more rapidly. The consumption of wood materials is increasing a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/08B27K3/52B27K5/04C08G12/38
Inventor 刘君良柴宇博刘焕荣阳财喜孙柏玲王雪花
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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