Composite structure plywood and production method thereof
A technology of composite structure and production method, which is applied in the direction of chemical instruments and methods, layered products, and the joining of wooden veneers, and can solve problems such as poor mechanical properties, reduced physical and mechanical properties, and limited application fields of plates
Inactive Publication Date: 2014-12-10
贵港市湘益木业有限公司
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- Description
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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
Method used
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[0021] Such as figure 1 As shown, the composite structure plywood of the present invention includes several layers of veneers formed by laminating along-grain veneers 101 and cross-grain veneers 102 , and the number of veneer layers can be appropriately increased or decreased according to the application occasion and thickness requirements of the product. A plurality of holes are rolled on the veneers, a layer of non-woven fabric 103 is provided between some of the veneers, and polyethylene plastic film 104 is used to glue between adjacent veneers and between veneers and non-woven fabrics. A layer of non-woven fabric 103 is provided on the upper and lower surfaces of the central veneer 105 of the plywood, the upper and lower surfaces of the second veneer 106 from the front, and the second veneer 107 from the back. The grain directions of the veneers arranged on both sides of the non-woven fabric are parallel to each other.
[0022] In this embodiment, a total of 19 layers of ...
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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...
Claims
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IPC IPC(8): B32B21/04B27D1/04
Inventor 叶翠仙唐兴平林祥江徐志杰翁文剑
Owner 贵港市湘益木业有限公司