Method for enhancement treatment through anaerobic heat treatment of poplar and impregnation with melamine urea formaldehyde resin

Abstract

The invention discloses a method for enhancement treatment through anaerobic heat treatment of poplar and impregnation with melamine urea formaldehyde resin. The method comprises the steps of preparing poplar wood, carrying out anaerobic heat treatment on the poplar wood, carrying out impregnation with the low-viscosity melamine urea formaldehyde resin, and carrying out drying and curing treatmentor pressurization drying and curing treatment. The method is characterized by comprising the steps that drying treatment is carried out on the poplar wood, dressing treatment is carried out on the dried poplar wood, the dressed poplar wood is subjected to anaerobic heat treatment under the protection of water vapor or nitrogen, the poplar wood subjected to anaerobic heat treatment is placed intothe normal-temperature and low-viscosity melamine urea formaldehyde resin for impregnation treatment at a certain temperature, after a certain time, the poplar wood is taken out and is placed on a support, residual resin on the surface of the poplar wood is scraped so as to enable the surface of the poplar wood to be subjected to air drying and then be subjected to drying and resin curing treatment, and therefore the poplar wood subjected to enhancement treatment through anaerobic heat treatment of the poplar and impregnation with the melamine urea formaldehyde resin is prepared.

Description

technical field [0001] The invention belongs to outdoor decorative building materials, which is a kind of poplar wood as the main raw material, through the anoxic heat treatment of poplar wood, impregnated with melamine urea formaldehyde resin, drying and curing or pressurized drying and curing to impregnate poplar The melamine urea formaldehyde resin in the wood is cured, so that the bending strength, elastic modulus, hardness, dimensional stability, corrosion resistance, etc. are greatly improved, so that it can meet the requirements of outdoor floors, bridges, etc. Background technique [0002] Because of its advantages of fast growth, high yield, and early maturity, poplar is the main tree species in my country's plantation forests. It is widely distributed, has many varieties, and has strong adaptability, accounting for the largest proportion of my country's plantation fast-growing forests. However, it has low density, thin cell wall, and large cell cavity, resulting in...

AI Technical Summary

Problems solved by technology

[0004] At present, wood impregnation enhancement treatment generally adopts the impregnation method of first vacuum and then pressure, or impregnates urea-formaldehyde resin, phenolic resin, and melamine-formaldehyde resin by rolling impregnation method, and then performs high-temperature treatment after impregnation. The main problem of the above-mentioned method is that the impregnation equipment is complicated. , high cost, high temperature treatment after impregnating the resin will cause aging and degradation of the resin, reduce its reinforcing effect, and cause defects such as cracks on the surface of the treated material

Urea-formaldehyde resin has the characteristics of low price, but its water resistance and aging resistance are poor, so it is not suitable for outdoor use. After the wood color changes greatly, it limits its use; melamine formaldehyde resin has the characteristics of water resistance, good aging resistance, and basically colorless after curing, but its price is relatively high