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Formaldehyde-free plywood with impregnated paper finish and manufacturing process thereof

A technology of plywood and impregnated paper, applied in the field of formaldehyde-free plywood, can solve problems such as cracking and affecting the use of veneer plywood

Inactive Publication Date: 2018-03-09
东营市盛基环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, plywood produced with thermoplastic film has to go through a high temperature of about 170°C during the production process, which changes the moisture content and toughness of the plywood. In the later stage, it is easy to crack after using impregnated paper veneer, which affects the veneer plywood. use

Method used

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  • Formaldehyde-free plywood with impregnated paper finish and manufacturing process thereof
  • Formaldehyde-free plywood with impregnated paper finish and manufacturing process thereof

Examples

Experimental program
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Effect test

Embodiment

[0012] Taking the production of 18mm multi-layer plywood as an example, first use rotary cut veneer 1 and thermoplastic resin film 2 ( figure 1 ) Layers are alternately assembled, and the rotary cut veneer can be 7-9 layers. After hot pressing→cold pressing→repairing→thickness sanding→health preservation and other processes, the formaldehyde-free core board is made; and then the core board is coated After non-formaldehyde thermosetting liquid glue, press and paste a layer of rotary-cut veneer on both sides. The thickness of the rotary-cut veneer is not less than 1mm. After cold pressing→hot pressing→repairing→sanding→health preservation and other processes, the secondary core is made After the secondary core board is coated with non-formaldehyde thermosetting liquid glue, a layer of decorative veneer is pressed on each side. The thickness of the decorative veneer is less than 1mm. (Technical wood) Through cold pressing→hot pressing→repairing→polishing→health preservation and ...

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Abstract

The invention relates to formaldehyde-free plywood with an impregnated paper finish and a manufacturing process thereof. The used bonding material adopts the mode that thermoplastic resin membrane anda non-formaldehyde thermosetting liquid adhesive are used cooperatively. Bonding of two layers of each of the upper surface and the lower surface of the plywood adopts the non-formaldehyde thermosetting liquid adhesive; and bonding of other layers inside adopts the thermoplastic resin membrane. By virtue of cooperative use of the thermoplastic resin membrane and the non-formaldehyde thermosettingliquid adhesive, the production cost of the formaldehyde-free plywood is reduced, and the problem that plywood produced by simply using a thermoplastic film is fractured after being finished with theimpregnated paper is effectively solved.

Description

technical field [0001] The invention relates to the field of wood-based panels in the wood-based panel industry, and relates to a formaldehyde-free plywood for decoration or furniture production. Background technique [0002] Plywood is the main variety in the production of wood-based panels in my country. In the past, it was mainly produced by bonding rotary-cut veneers with formaldehyde adhesives (phenolic resin adhesives, urea-formaldehyde resin adhesives, or melamine-modified urea-formaldehyde resin adhesives). However, due to the most prominent The problem is that the released free phenol and free formaldehyde can cause great harm to the human body, so in recent years people have begun to study non-formaldehyde bonding materials to produce plywood. At present, the main research directions in China are plywood produced by soybean protein adhesive, plywood produced by water-based polyurethane adhesive, plywood produced by modified starch adhesive, plywood produced by therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B21/04B32B21/06B32B21/14B27D1/08B27D1/06B27D1/00
CPCB32B7/12B27D1/00B27D1/06B27D1/08B32B21/042B32B21/06B32B21/14B32B2037/1215B32B2037/1269B32B2255/08B32B2607/00
Inventor 杨奠基石延芳
Owner 东营市盛基环保工程有限公司