Method for preparing thick type shaving board through waste outdoor heat-treated wood and conventional wood and shaving board

A particleboard and wood technology, which is used in the joining of wooden veneers, wood layered products, wood processing appliances, etc., can solve the problem of poor surface wettability of heat-treated wood, glued reuse is not disclosed, and does not consider heat-treated wood glued and other problems, to achieve the effect of dimensional stability, reduction of expansion rate, and improvement of dimensional stability

Active Publication Date: 2016-01-06
广西东林木业有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Previous research conclusions obtained from tests at room temperature are that the surface wettability of heat-treated wood is poor, which is not conducive to gluing and finishing
Therefore, wood professionals generally do not consider the gluing of heat-treated wood, so the reuse of waste heat-treated wood has not been disclosed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Unmodified poplar is selected as conventional wood for standby.

[0018] Recycle waste outdoor heat-treated poplar wood products from the market, or use the processing residues of outdoor heat-treated poplar wood products. The preparation process of poplar wood for outdoor heat treatment includes but is not limited to the content described in the similar invention patent ZL2007100689245.

[0019] The process of preparing thick particleboard from waste outdoor heat-treated poplar and unmodified conventional poplar: crushing, drying, sizing, paving, hot pressing, and post-treatment (cutting, sanding) process etc.

[0020] Specifically, conventional poplar is mechanically crushed to prepare coarse shavings with a particle size of 0.5-1.0 cm. At the same time, in order to improve the surface quality of board products, a size of 0.1-1.0 cm is taken from the fragments produced by crushing conventional poplar. Particles with a particle size of 0.2cm are used as the fine shav...

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PUM

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Abstract

The invention provides a method for preparing a thick type shaving board through waste outdoor heat-treated wood and conventional wood. The thick type shaving board prepared through the method is small in hygroscopicity, stable in size and good in comprehensive mechanical property. According to the method, the waste outdoor heat-treated wood and the conventional wood are crushed into wood shavings respectively, and the two wood shavings are dried until the moisture content is 2%-4%, and then sizing and stirring are conducted; the wood shavings are made into a board blank through mat formation and are formed through hot pressing; when the mat formation is conducted, the wood shavings of the waste outdoor heat-treated wood are paved in a sandwich layer of the board blank, and the wood shavings of the conventional wood are paved in a surface layer of the board blank; in the sizing process, the adhesive is a urea-formaldehyde resin adhesive, or a phenolic resin adhesive, or a isocyanate adhesive; in the hot pressing process, the hot pressing pressure is 2.5-3.5 Mpa, the hot pressing time is 0.2-0.5 min/mm, and if the urea-formaldehyde resin adhesive is used, the hot pressing temperature is 110 DEG C to 160 DEG C; and if the phenolic resin adhesive or the isocyanate adhesive is used, then the hot pressing temperature is 150 DEG C to 200 DEG C.

Description

technical field [0001] The invention relates to a thick particle board, in particular to a thick particle board prepared by using waste heat-treated wood. Background technique [0002] Wood heat treatment technology (carbonized wood technology) is one of the emerging technologies in the field of wood processing that appeared 20 years ago. Heating process, heat preservation process, cooling process. Due to the different degrees of pyrolysis and other chemical reactions of wood components such as hemicellulose in the heat treatment process, some physical and chemical properties of heat-treated wood have undergone permanent changes compared with materials. Among them, the color of the heat-treated wood is deepened and is close to that of some rare hard broad-leaved wood, the equilibrium moisture content is reduced, the drying shrinkage and swelling caused by different humidity are reduced, and the durability is improved. In addition, there is no need to add any chemical reage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/02B27N3/10B27N3/14B27D1/08B27D1/04B32B37/06B32B37/10B32B37/12B32B21/02
Inventor 李涛周定国
Owner 广西东林木业有限公司
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