A method for preparing glue-free bamboo boards by closed hot pressing

Abstract

The invention belongs to the technical field of bamboo processing, and in particular relates to a method for preparing non-adhesive bamboo boards by airtight hot pressing, including preparation of saturated mixed materials, microwave-treated materials, preparation of treatment liquid, preparation of fiber materials and preparation of non-adhesive bamboo boards. Compared with the prior art, the present invention has the following advantages: the bamboo chips or bamboo chips after degreening and deyellowing are subjected to microwave treatment in a saturated state, and the moisture in the bamboo cells is gasified rapidly, diffuses outwards and breaks through the pit membrane, changing Redistribution and precipitation of substances in the bamboo, and then use the treatment solution to carry out negative pressure treatment to immerse it into the bamboo cells. The treatment solution can form furfural, and furfural and bamboo cells form adhesive components under hot pressure, making it structurally stable. Bamboo board; the synergistic effect of morning glory rattan and wormwood root can improve the anti-corrosion and anti-mildew performance of bamboo board and improve the scope of application of the product.

Description

technical field [0001] The invention belongs to the technical field of bamboo processing, and in particular relates to a method for preparing non-adhesive bamboo boards by airtight hot pressing. Background technique [0002] As a wood substitute material, bamboo has the characteristics of high strength, good toughness, and high hardness. With its fast growth, short cycle, high output, and good performance, it has been popularized and applied in various fields in recent years. Bamboo boards are remanufactured boards made of multiple small pieces of bamboo strips that are regularly stacked and bonded with an adhesive, but most of the adhesives now contain formaldehyde, which is harmful to the human body, and bamboo contains Rich nutrients, such as starch, protein, fat, etc., are prone to rot and mildew under appropriate conditions. When used outdoors, it is easy to absorb visible light and ultraviolet rays and cause discoloration or even degradation. These defects limit the ap...

AI Technical Summary

Problems solved by technology

[0002] As a wood substitute material, bamboo has the characteristics of high strength, good toughness, and high hardness. With its fast growth, short cycle, high output, and good performance, it has been popularized and applied in various fields in recent years. Bamboo boards are remanufactured boards made of multiple small pieces of bamboo strips that are regularly stacked and bonded with an adhesive, but most of the adhesives now contain formaldehyde, which is harmful to the human body, and bamboo contains Rich nutrients, such as starch, protein, fat, etc., are prone to rot and mildew under appropriate conditions. When used outdoors, it is easy to absorb visible light and ultraviolet rays and cause discoloration or even degradation. These defects limit the application range of bamboo. , with the strengthening of people's awareness of environmental protection and the continuous development of processing technology, people gradually abandon the use of chemical agents to prepare glue-free plywood, and instead use the natural material conversion method to produce glue-free plywood wood-based panels, that is, use the inherent substances of the material itself plus natural components Obtain a new material with cementation effect, and finally realize gluing. In the prior art, the bamboo green inner yellow is removed, and the bamboo is cut into blocks or filaments. After drying, high-temperature water vapor softening treatment is carried out. Wood-based panels can be obtained by pressing and heat curing. The resulting products are environmentally friendly and can reduce production costs. The resulting products have poor weather resistance and are prone to decay, and their mechanical properties need to be further improved.

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