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

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...

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.