Flattened bamboo high-strength composite laminate with sawtooth interlocking structure and manufacturing method thereof

Abstract

The invention discloses a sawtooth-interlocking-structure flattened bamboo high-strength composite laminated board and a manufacturing method thereof. A flattened bamboo veneer is manufactured througha sawtooth interlocking structure, so that the tensile stress generated by flattening among tabasheer tissues can be effectively released. In the tooth pressing process, the compactness of the tabasheer surface is improved to a certain extent, the density of the inner wall of a bamboo is increased, and warping and cracking caused by uneven internal stress and density distribution after the bamboois flattened can be effectively controlled. A composite laminated board basic unit is formed by gluing two flattened bamboos in a sawtooth occlusion mode, in the composite laminated board made of thesawtooth interlocking structure, the gluing area is increased due to the sawtooth structure, and the shear resistance is greatly enhanced. The density distribution of the cross section of the composite laminated board unit is balanced, the strength of the upper surface and the lower surface of the composite laminated board unit is high, and the anti-shearing capacity of the middle part is high, so that the structural design requirements of bending-resistant components are met; and the composite laminated board subjected to sawtooth occlusion treatment can effectively control deformation generated by internal stress of the bamboo, and the stability and the durability of the composite laminated board are greatly improved.

Description

Technical field [0001] The invention relates to the field of material preparation, in particular to a high-strength composite laminated board of flat bamboo with a sawtooth interlocking structure and a manufacturing method thereof. Background technique [0002] China is the country with the richest bamboo resources in the world. The types, area and volume of bamboo forests rank first in the world. The area of ​​bamboo forests is 50,000 Hm per year. 2 The increasing speed of bamboo material has provided sufficient raw materials for processing bamboo into various products to meet economic construction and people’s lives. Bamboo has the characteristics of thin and hollow walls and large sharpness; the outer layer of bamboo green vascular bundles are densely distributed, hard texture, smooth surface, with a layer of wax, and poor wettability to water and adhesives; the inner layer of bamboo yellow The distribution of tube bundles is small, the tissue is loose, the texture is fragile,...

AI Technical Summary

Problems solved by technology

However, at present, during the rolling and forming process of flattened bamboo, in order to release the internal stress between the bamboo yellow tissues, the treated round bamboo is partially excavated and rolled. Due to the large difference in strength between the bamboo yellow surface and the bamboo green surface, it is easy to cause bamboo Cracks and breakages appear on the yellow surface, stress concentration, buckling deformation of the panel, cracking of the adhesive layer, and poor durability occur during long-term use

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