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Method for forming high-strength and formaldehyde-release-free plywood through adhesive-free and self-adhesion

A formaldehyde release and self-adhesive technology, which is applied in wood treatment, wood heating, can-opening and impregnation, etc., can solve the problems of not being able to prepare self-adhesive plywood, and achieve the effects of wide application value, environmental friendliness and simple process

Active Publication Date: 2021-06-22
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem that the prior art cannot prepare self-adhesive, high-strength, environmentally friendly, and highly stable plywood, and provides a method for forming high-strength, formaldehyde-free plywood without adhesives and self-adhesive

Method used

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  • Method for forming high-strength and formaldehyde-release-free plywood through adhesive-free and self-adhesion
  • Method for forming high-strength and formaldehyde-release-free plywood through adhesive-free and self-adhesion
  • Method for forming high-strength and formaldehyde-release-free plywood through adhesive-free and self-adhesion

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specific Embodiment approach 1

[0035] Specific embodiment one: the present embodiment is a kind of non-adhesive, self-adhesive to form the method for high-strength, formaldehyde-free plywood, and it is carried out according to the following steps:

[0036] 1. Cleaning:

[0037] Soak the wood in distilled water or ethanol solution, ultrasonically clean it for 1h-3h, and then vacuum-dry it for 1h-24h at a temperature of 60°C-180°C to obtain the cleaned wood;

[0038] The thickness of the wood is 0.5 mm to 2.5 mm;

[0039] 2. Dehemicellulose:

[0040] Soak the cleaned wood in the dehemicellulose solution, heat it in a water bath at a temperature of 60°C to 90°C for 2h to 10h, and then soak it in deionized water at a temperature of 20°C to 30°C 1h to 3h, and repeated soaking 2 to 4 times to obtain dehemicellulose-defiberized wood;

[0041] The mass percent of the dehemicellulose solution is 1% to 30%;

[0042] 3. Delignification:

[0043] Soak the dehemicellulosed wood in the delignification solution, heat...

specific Embodiment approach 2

[0058] Embodiment 2: This embodiment is different from Embodiment 1 in that the wood described in step 1 is coniferous or broad-leaved. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0059] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the dehemicellulose solution described in step 2 is a mixed solution of sodium hydroxide and sodium sulfite, sodium hypochlorite solution, sodium sulfite solution or anthraquinone solution. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for forming high-strength and formaldehyde-release-free plywood through adhesive-free and self-adhesion, and relates to a method for forming plywood through adhesive-free and self-adhesion. The invention aims to solve the problem that self-adhesive, high-strength, environment-friendly and high-stability plywood cannot be prepared in the prior art. The preparation method comprises the following steps: 1, cleaning; 2, removing hemicellulose; (3) delignification; 4, activating treatment; 5, dissolving treatment; and 6, regeneration treatment. The method is used for forming the high-strength plywood without formaldehyde release through adhesive-free and self-adhesion.

Description

technical field [0001] The invention relates to a method for forming plywood without adhesive and self-adhesive. Background technique [0002] With the rapid development of engineering construction and furniture decoration industry, the demand for wood has increased sharply, and the development of wood-based panel industry is the main way to improve wood utilization and save wood resources. Wood-based panels are boards or molded products made of wood or other non-wood plants as raw materials, separated by mechanical processing, and with or without adding chemical adhesives. The number of its extended products is as high as hundreds, mainly including three major categories of products: plywood, shaving (chip) board and fiberboard. [0003] Plywood is made by peeling wood sections into veneers or sliced ​​into thin wood chips, and then glued together with adhesives. In order to reduce the anisotropic characteristics of wood, the plywood has uniform characteristics and stable ...

Claims

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Application Information

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IPC IPC(8): B27K3/04B27K3/08B27K5/00B27K5/04
CPCB27K3/04B27K5/001B27K3/08B27K5/04
Inventor 甘文涛董晓菲唐剑夫尚莹王耀星李连震李坚
Owner NORTHEAST FORESTRY UNIVERSITY