Wood modifying method

Abstract

The invention relates to a method for modifying low-density wood. The method comprises sucking wood, increasing weight, soaking, drying, thermosetting and compressing, wherein the water content of the wood subjected to sucking treatment is 28-32 percent; the gain in weight of wood subjected to weight increasing treatment is 30-35 percent; the gain in weight of the wood subjected to soaking treatment is 15-20 percent; the water content of the wood subjected to drying treatment is 15-18 percent; and a soaking agent comprises the following components in parts by weight: 100 parts of thermosetting resin, 10-20 parts of water-soluble natural organic matter, 3-5 parts of aqueous waterproof agent, 0.5-1 parts of fire retardant and 1-2 parts of surfactant. In the modifying method, a physical modifying technology, a chemical modifying technology and a mechanical modifying technology of hot compression deformation are organically combined, so that modified wood has high density, high intensity and the like of high-level wood, has higher size stability than high-level wood, and has the characteristic of low cost compared with high-level wood.

Description

Technical field [0001] The invention relates to a wood modification method, in particular to a method for low-density wood modification. Background technique [0002] Wood modification technologies include: wood plasticization, wood impregnation, wood acetylation, wood heat treatment, wood compression and bending, wood bleaching and dyeing, and other modification technologies. [0003] Wood plasticization refers to the technology of injecting unsaturated olefin monomers, oligomers, and prepolymers into the wood, using radiation or free radical initiator-thermal initiation means to provide energy to polymerize and solidify the wood. The resulting material is called plastic-laminated wood, which not only retains the natural excellent properties of wood, but also improves material defects. Its dimensional stability, hardness, wear resistance, corrosion resistance, and insect resistance have been greatly improved, and some can even reach More than natural precious wood. In addition, ...

AI Technical Summary

Problems solved by technology

There are still many problems in my country's wood heat treatment industry: for example, there is no perfect heat treatment process; the related supporting technologies are not mature; there is a lack of special heat treatment equipment, and most of them use traditional kiln drying methods; there are quality defects in products, such as trees. Section falling off, surface cracking and internal cracking, large color difference, etc.

There are also some poor-quality tree species, such as larch, sylvestris pine, birch, etc. in the north, and masson pine, kapok, etc. in the south, which have not been efficiently utilized

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