A method for preparing wood-plastic composite oriented strand board based on spraying method

Abstract

The invention discloses a method for preparing a wood-plastic composite oriented strand board based on a plastic spraying mode. The problems that the content and the density of plastic are distributed unevenly in the thickness direction of a product due to the fact that large-density plastic particles slide and leak towards a bottom layer of a slab in the prior art are solved. The method comprises the steps of wooden raw material preparing, raw material pretreatment, plastic sheet preparing, plastic powder spraying, mixing through a roller, multi-layer oriented paving, cold pressing, hot pressing and post processing. The method has the beneficial effects that plastic powder can adhere to the surface of a wooded raw material through plastic powder spraying and oriented paving, and the effect that the plastic powder is uniformly scattered in each layer is effectively ensured; on the basis that the usage quantity of plastic is decreased and the usage quantity of the wood raw material is increased, the comprehensive mechanical property of a wood-plastic composite material is improved; the usage quantity of the wooded raw material can be increased, and the effects that valueless materials are sufficiently used, and bad materials are optimized; and the method can be used for the high-performance wood-plastic composite material.

Description

technical field [0001] The invention relates to the field of material processing, and relates to a preparation method of a wood-plastic composite material, in particular to a method for preparing a wood-plastic composite oriented strand board based on a plastic spraying method. Background technique [0002] Wood-plastic composites are one of the fastest growing new polymer composites in the field of composites. Extrusion, injection and hot pressing are the three main methods of producing wood-plastic composites, but the extrusion and injection methods limit the size of their products, so hot pressing is the optimal method for producing large-format wood-plastic composites. The existing production technology of wood-plastic composite materials requires the size of woody raw materials to be small enough. The industry usually uses 40-100 mesh powdered wood fibers. The grinding of raw materials not only increases energy consumption, but also is the source of dust pollution and n...

AI Technical Summary

Problems solved by technology

The beneficial effect of the present invention is: the plastic powder can be adhered to the surface of the wood raw material through the directional paving of the plastic powder, which effectively ensures the uniform dispersion of the plastic powder in each layer, and improves the improvement on the basis of reducing the amount of plastic and increasing the amount of wood raw material. The comprehensive mechanical properties of wood-plastic composite materials can increase the amount of wood raw materials used, realize the large use of small materials and the optimal use of inferior materials, and can be used to prepare high-performance wood-plastic composite materials, making full use of wood and straw materials, and will not The accumulation of plastics in the thickness direction of the board avoids the formation of wavy section density distribution (VDP), and overcomes the problems in the preparation process of wood-plastic composite boards in the prior art due to the small size and low content of wood raw materials, plastic and density distribution. The problems of unreasonable resource utilization, high energy consumption, and poor comprehensive mechanical properties of wood-plastic panels caused by unevenness

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