A formaldehyde-free bamboo recombined plastic building structural material and its preparation process

Abstract

The invention discloses a formaldehyde-free bamboo recombined, plasticized and polymerized building structure material and a production technique. The formaldehyde-free bamboo recombined, plasticized and polymerized building structure material is structurally characterized in that at least two separate expanded bamboo recombined, plasticized and polymerized veneer layers are overlaid, and fiber lignin in bamboo is grafted with polymer resin compounds, and the polymer resin compounds are plasticized and polymerized with the bamboo under the hot-melt state to form an integer; when the separate expanded bamboo recombined, plasticized and polymerized veneer layers are overlapped, tabasheer layers are opposite, and bamboo green layers are opposite. Using ratio of bamboo is increased; working efficiency is improved, and cost of unit products is lowered; mechanical property of bamboo is maintained fully; the recombined plasticized and polymerized bamboo is filled with the polymer resin to modify the bamboo, and the material becomes an environment-friendly material suitable for building structures.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a formaldehyde-free bamboo recombined plastic building structure material and a preparation process thereof. Background technique [0002] Bamboo has fairly good mechanical properties and is considered the most efficient material in nature in terms of strength and cost. The tensile strength of bamboo is about 2 times that of wood, and the compressive strength is 1.5 times that of wood. The specific strength of bamboo is higher than that of wood and ordinary steel. Therefore, bamboo has good basic conditions for building structural materials. If it is developed as a building structure material, the use of bamboo in the field of construction can be broadened, and an effective way to improve the utilization of bamboo resources can be opened up. So far, bamboo has basically remained in the application of interior decoration, small furniture, outdoor decoration...

AI Technical Summary

Problems solved by technology

At present, when the press capacity of recombined bamboo and laminated bamboo meets the requirements, thicker slabs can be obtained, and then cut into beams, columns and other square materials of different sizes. The pressing of this kind of bamboo wood-based panels requires high pressure. In order to obtain sufficient strength, the product density is relatively high, the consumption of raw materials is large, and the production cost is high

Moreover, in their manufacturing process, the fiber biomass of bamboo is planed and milled more, the internal tissue structure of bamboo is destroyed, and its strength cannot be fully exerted.

At the same time, the resin glue with formaldehyde is used to add harmful chemical components to the green and environmentally friendly bamboo, which produces material pollution. It is not suitable for use as building structural materials and is harmful to people's health.

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