Glue-free reconstituted veneer and preparing method thereof

A technology for veneer and wood, applied in the field of glue-free reconstituted veneer and its preparation, can solve problems such as toxic and harmful volatiles, and achieve the effects of high market value, good dimensional stability, and control of raw material costs
CN112643814AActive Publication Date: 2021-04-13NORTHEAST FORESTRY UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEAST FORESTRY UNIVERSITY
Publication Date
2021-04-13

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Abstract

Belongs to the technical field of wood processing. In order to solve the problem that an adhesive agent is adopted in an existing reconstituted veneer, and consequently, poisonous and harmful volatile matter is released, the preparing method of the glue-free reconstituted veneer comprises the steps that a fast-growing wood veneer is subjected to delignification by using a delignification solution to obtain a delignified wood sample; 80% of water in the delignified wood sample is removed through cold pressing; and after hot-pressing drying, a glue-free reconstituted veneer is obtained. According to the preparing method, hydroxyl on the surface of cellulose and hemicellulose is exposed through delignification, a multiple hydrogen-bond network is formed under pressure, and high mechanical strength and high size stability of the reconstituted veneer are given. In the preparing method, no adhesive agent is used, the reconstituted veneer is low in cost, simple in process and short in time, zero volatile of formaldehyde is really realized; the problems are solved that a great amount of the adhesive agent is used in artificial timbers, the indoor environment is polluted, and the human body health is harmed; and the glue-free reconstituted veneer has a higher market value.
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Description

technical field

[0001] The invention belongs to the technical field of wood processing, and in particular relates to a recombined veneer glued without glue and a preparation method thereof. Background technique

[0002] Veneer veneer is a common decorative method used to improve the appearance characteristics of wood-based panels. The veneer is divided into natural veneer and artificial veneer. Natural veneer is made of precious wood as raw material and cut in different ways. It has the characteristics of rich texture and beautiful color, but the shortage of supply and high cost limit its wide application. The veneer produced with poplar and other economical fast-growing wood as raw materials has rough surface and poor mechanical properties, which cannot meet the needs of the market. The technical veneer made of fast-growing wood through a series of processes such as rotary cutting, sizing, billet formation, hot pressing, and planing, has been accepted by the market due to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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