Composite structure plywood and production method thereof

Abstract

The invention relates to the technical field of artificial board production, in particular to novel and environment-friendly composite structure plywood and a production method of the composite structure plywood. The plywood comprises a plurality of layers of veneers. Non-woven fabrics are arranged among part of the veneers, polythene plastic films are used for gluing adjacent veneers and gluing the veneers and the non-woven fabrics. The production method of the composite structure plywood comprises the following steps that holes are rolled in the surfaces of the veneers; the veneers coincide with one other, the non-woven fabrics are arranged among part of the veneers, the polythene plastic films are arranged among the adjacent veneers and among the veneers and the non-woven fabrics, and then plate blanks are formed; the plate blanks are hot-pressed, hot-pressing temperature is 160-190 DEG C, hot-pressing pressure is 1.5-3.0 MPa, and hot-pressing time is 1.5-3.0 min / mm; the plate blanks are cooled, displayed, and processed in an edge cutting mode. The number of layers of the veneers can be properly increased or decreased according to product using occasions and the thickness requirement. The composite structure plywood produced by the method is good in mechanical performance, environment-friendly and simple in manufacturing process, and low in cost.

Description

technical field [0001] The invention relates to the technical field of wood-based panel production, in particular to a novel environment-friendly composite structure plywood and a production method thereof. Background technique [0002] There are a large number of plywood made of adhesives at home and abroad, and the products have different degrees of free formaldehyde, which pollutes the environment. However, the formaldehyde-free plywood with animal and vegetable protein, isocyanate, etc. as adhesives that has appeared in recent years has no promotion value because of its high cost. There are also research reports on plywood composited with veneer and waste plastics, but the surface of the veneer is not perforated, and its products can only meet the requirements of the national standard Class II plywood (GB / T 17657-1999). There are literatures showing that dense pinholes are rolled on the glued surface of the veneer, and adhesives such as urea-formaldehyde and phenolic fo...

AI Technical Summary

Problems solved by technology

However, the rolling process reduces some physical and mechanical properties of plywood, such as static bending strength and elastic modulus, etc., especially the plywood produced by fast-growing wood veneer has poor mechanical properties, which limits the application field of the plate

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