A high-permeability resin-type wood reinforcement modifier and an efficient impregnation treatment control method

Abstract

The invention belongs to a high-permeability resin type timber enhancing modifier and an efficient immersion treatment control method. The method includes: preparing materials according to mole ratio of melamine to formaldehyde to methanol to urea being 1:2-2.5:0.5-1.0:0.2-1.0, wherein the adding amount of flexibilizer is 10-30% of the amount of the melamine. Modified melamine urea resin with good water solubility, high permeability and low molecular weight and used for immersion is prepared by adjusting raw material proportion, using a low-temperature long-time multistage synthesizing process and adding alcohol flexibilizer, polymerization inhibitor and the like. The permeation channels of timber hard in immersion are opened through a multi-time alternating breathing type immersion treatment process, the timber can be permeated evenly, and timber performance is improved greatly. The high-permeability resin type timber enhancing modifier and the efficient immersion treatment control method have the advantages that the timber hard in immersion can be permeated sufficiently, and various performance of the timber can be improved evidently; the fast-growing timber, modified by the method, of a man-made forest is high in density, high in strength, good in toughness, stable in size, flame retardant, capable of preventing mildew and corrosion, good in processing performance, environmental friendly in production, good in use effect, high in additional value, and the like.

Description

technical field [0001] The invention belongs to a high-activity and high-permeability resin-type wood reinforcement modifier capable of effectively penetrating hard-to-impregnate wood and a high-efficiency impregnation treatment control method. Background technique [0002] The area of ​​my country's plantation forest ranks first in the world. Due to the defects of low density, soft material and low strength of plantation forest wood, it needs to be enhanced and modified to realize its high value-added utilization, thereby promoting my country's plantation forest resource advantages to economic advantages. transform. However, impregnation of some woods (such as Chinese fir) has always been a difficult problem that wood modification experts have been trying to overcome. Because fir wood pits are usually deposited by amorphous substances and form a completely encrusted pit membrane, the permeability is poor. Researchers at home and abroad have proposed mechanical treatment, so...

AI Technical Summary

Problems solved by technology

Problems existing in resin impregnation modification: the molecular weight of the modified liquid is too large and the viscosity is high, which makes it difficult to achieve uniform and effective penetration of large-size plates; during the preparation of the modified liquid, the content of free formaldehyde exceeds the standard, which is harmful to the human body and the environment; The storage period of the agent is short, and it is easy to be turbid in a short period of time, so it cannot be reused; the surface of the modified wood absorbs moisture, which affects the performance of paint and glue; the resin impregnation enhancement treatment often causes the toughness to decrease while improving the strength of the wood; the comprehensive cost of modification treatment is high