Oriented composite particle board with plastic spraying and melting and containing plastic flakes

Abstract

The invention discloses an oriented composite particle board spray-melted by plastic and containing plastic sheets, and aims to solve nonuniform distribution of the plastic content and density in the product thickness direction caused by slip leakage of plastic particles with high density to the bottom layer of a board blank in the prior art. The oriented composite particle board has a multilayer structure; each layer is manufactured through oriented paving; each layer of the multilayer structure is paved by mixtures of wood raw materials and plastic sheets; and the wood raw materials are machined by spraying powder for plastic spray melting. The oriented composite particle board has the following beneficial effects: the surfaces of the wood raw materials machined by the spraying powder for plastic spray melting are uniformly bonded with thermoplastic plastic, so that the comprehensive mechanical performance of the wood plastic composite material is improved based on reduction of the plastic use level and increment of the use level of the wood raw materials, the use level of the wood raw materials can be increased, the big use of small materials and the good use of bad materials are realized, and the wood plastic composite material with high performance can be prepared.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to an oriented composite particle board which has been melted by plastic and contains plastic flakes. 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 noise pollution. The use of large-sized raw materials can keep the original struc...

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; the plastic flakes are mixed with wood raw materials and paved, so that the plastic flakes can be mixed in the wood raw materials and formed into blanks, which can increase the use of wood raw materials and reduce the use of thermoplastics. It also realizes the large use of small wood and the superior use of inferior wood of wood raw materials, which can be used to prepare high-performance wood-plastic composite materials, making full use of wood and straw materials, avoiding the accumulation of plastic in the thickness direction of the board, and thus avoiding waves The formation of cross-sectional density distribution (VDP) overcomes the unreasonable resource utilization and high energy consumption caused by the small size and low content of wood raw materials, uneven distribution of plastic and density in the preparation process of wood-plastic composite panels in the prior art , The problem of poor comprehensive mechanical properties of wood-plastic panels

Images