Method for protecting and treating recombined bamboo material

Abstract

The invention provides a method for protecting and treating a recombined bamboo material. The method comprises the following steps of 1, preparing resin; 2, carrying out surface treatment of recombined bamboo material; and 3, coating and curing resin. In the step 1, epoxy resin and polyether amine are taken and mixed according to a molar ratio of 1: 0.8-1.2, and after defoaming is carried out, a mixed solvent of xylene and n-butyl alcohol and attapulgite are added and uniformly stirred; in the step 2, the surface of the material is ground by using a steel wire brush, and then is subject to secondary sand grinding treatment by using coarse abrasive paper; and in the step 3, the surface of the material is coated with resin, and the resin stored at 30 + / -5 DEG C for 30 minutes, and after thesurface resin of the material is flattened, the resin is heated to 75-85 DEG C and cured for 1 h and then is cured for 2h at the temperature of 110-130 DEG C. The recombined bamboo material treated byusing the method is good in weather resistance and free of cracking during outdoor use, the color change, the dry shrinkage, the water absorption and the thickness expansion rate are obviously reduced, and meanwhile, the bending strength and the impact strength are improved.

Description

technical field [0001] The invention relates to a protective treatment method for recombined bamboo, in particular to a protective treatment for outdoor recombined bamboo. Background technique [0002] Reconstituted bamboo mainly refers to the composite material made of bamboo sheets, bamboo strips and other unit materials after heat treatment at high temperature and subsequent hot pressing and gluing. The material utilization rate is high, the dimensional stability is good, the mechanical properties are excellent, and the color is close to the color of mahogany. , has been widely used in outdoor floors, gardens and building materials, and is favored by users at home and abroad. However, it will still be deformed, cracked, discolored, even rotten and mildewed in the harsh outdoor environment (high temperature in summer, high humidity in Huangmei sky, dryness in autumn, and low temperature in winter), which brings great challenges to the safe use and maintenance of outdoor ma...

AI Technical Summary

Problems solved by technology

Although the degradation of hemicellulose can reduce the number of water-absorbing hydroxyl groups to a certain extent, thereby reducing the hygroscopicity of the material, in the long-term outdoor harsh environment, heat-treated bamboo still cannot avoid the dry shrinkage and wet expansion of bamboo as a biomass material. characteristics, resulting in cracking and deformation, providing natural channels for the erosion of wood rot fungi and molds, eventually leading to decay and mildew of materials

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