A kind of low-aldehyde impregnated film paper veneer wood-based panel and its preparation method

A technology for impregnating adhesive film paper and wood-based panels, which is applied in the direction of chemical instruments and methods, paper/cardboard layered products, manufacturing tools, etc., and can solve the problems of low glue hanging, unreachable gloss and fullness, and scratch resistance of decorative paper. Poor rubbing performance and other problems, to solve the problem of damage between papers, shorten the impregnation time, and achieve the effect of high physical properties

Active Publication Date: 2022-01-28
RES INST OF FORESTRY NEW TECH CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned organic polymer resin adhesives are difficult to penetrate into the interior of the decorative base paper due to their high viscosity, large particle size, and high degree of crosslinking, and there are many problems.
Most importantly, compared with the traditional urea-formaldehyde glue and melamine-formaldehyde glue, the decorative paper impregnated with this kind of adhesive has a lower gluing amount and poorer physical properties, especially poor scratch resistance, low hardness, gloss and The fullness cannot meet the requirements of the relevant national standards, and because the glue is difficult to penetrate into the paper layers, there is a defect of peeling between the decorative papers

Method used

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  • A kind of low-aldehyde impregnated film paper veneer wood-based panel and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Add all the pH regulator and deionized water, 1 / 3 soft monomer, 1 / 3 hard monomer, 1 / 3 initiator and all emulsifiers into the reactor, the stirring blade is at an angle of 50° to the horizontal plane, and the paddle The height from the leaf to the bottom of the reaction vessel is 1 / 2 of the liquid level, the stirring speed is 200r / min, and the reaction is stopped immediately after the bluish light is turned to prepare the pre-emulsion.

[0033] 2) Mix the remaining amount of soft monomer and hard monomer evenly, add dropwise to the pre-emulsion with the remaining amount of initiator at 85°C, raise the temperature to 85°C under stirring, and stir at a speed of 150r / min After 30 minutes of dripping, keep the stirring paddle at an angle of 50° to the horizontal plane during the dropping process, and the height between the paddle and the bottom of the reaction vessel is 1 / 2 of the liquid level. After the dropping is completed, keep warm for 20 minutes to prepare a water-ba...

Embodiment 2

[0044] 1) Add all the pH regulator and deionized water, 1 / 3 soft monomer, 1 / 3 hard monomer, 1 / 3 initiator and all emulsifiers into the reactor, the stirring blade is at an angle of 60° to the horizontal plane, and the paddle The height between the leaves and the bottom of the reaction vessel is 1 / 3 of the liquid level, the stirring speed is 150r / min, and the reaction is stopped immediately after the bluish light is turned to prepare the pre-emulsion.

[0045] 2) Mix the remaining amount of soft monomer and hard monomer evenly, add dropwise to the pre-emulsion with the remaining amount of initiator at 85°C, raise the temperature to 85°C under stirring, and stir at a speed of 100r / min After 30 minutes of dripping, keep the stirring paddle at an angle of 60° to the horizontal plane during the dropping process, and the height between the paddle and the bottom of the reaction vessel is 1 / 3 of the liquid level. After the dropping, keep warm for 30 minutes to prepare a water-based acr...

Embodiment 3

[0056] 1) Add all the pH regulator and deionized water, 1 / 3 soft monomer, 1 / 3 hard monomer, 1 / 3 initiator and all emulsifiers into the reactor, the stirring blade is at an angle of 50° to the horizontal plane, and the paddle The height between the leaf and the bottom of the reaction vessel is 1 / 2 of the liquid level, the stirring speed is 180r / min, and the reaction is stopped immediately after the bluish light is turned to prepare the pre-emulsion.

[0057] 2) Mix the remaining amount of soft monomer and hard monomer evenly, add dropwise to the pre-emulsion with the remaining amount of initiator at 85°C, raise the temperature to 85°C under stirring, and stir at a speed of 120r / min After 30 minutes of dripping, keep the stirring paddle at an angle of 50° to the horizontal plane during the dropping process, and the height between the paddle and the bottom of the reaction vessel is 1 / 2 of the liquid level. After the dropping is completed, keep warm for 20 minutes to prepare a wate...

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Abstract

The invention claims to protect a low-aldehyde impregnated adhesive film paper veneer wood-based panel and its preparation method. After the paper is completely immersed in the aldehyde-free impregnated adhesive for 30-60s, it is dried at 80-110°C, so that there is no excess on the paper surface. Glue, non-sticky shall prevail; after drying, completely immerse the paper in melamine-formaldehyde adhesive or urea-formaldehyde adhesive for 5-10s, and then completely dry at 90-110°C. Choose formaldehyde-free wood-based panels, heat-press the impregnated film paper on the wood-based panels at a pressure of 4-6Mpa and a temperature of 140-220°C for 0.5-2min. The wood-based panel prepared by this application is suitable for products with higher requirements on physical strength, and at the same time, the impregnation time of the aldehyde-containing adhesive is shortened accordingly, so as to reduce the absorption of aldehydes by paper, reduce the release of free formaldehyde in subsequent processing and final products, and truly Achieve low aldehydes.

Description

technical field [0001] The invention relates to a low-aldehyde impregnated decorative paper veneer wood-based panel and a preparation method thereof, belonging to the technical field of wood-based panel processing. Background technique [0002] Paper-impregnated wood-based panels are the most widely used and most important type of wood-based panels. Most of them use particleboard, fiberboard and other wood-based panels as base materials, and impregnated paper as decorative panels. It is widely used in the wood industry, especially in interior decoration, because it is more economical, has good processing performance, and has various surface decorations, and can endow wood-based panel products with more excellent performance. In the traditional production of wood-based panels with impregnated film paper veneer, the adhesives used for the bonding of the panel raw materials and the pressing of the veneer paper on the panels all release a large amount of free formaldehyde. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/00B32B21/02B32B21/06B32B29/06B32B27/04B32B37/06B32B37/10C09J133/04C09J11/08C09J11/04
CPCB27D1/00B32B21/02B32B21/06B32B29/06B32B37/06B32B37/10C09J133/04C09J11/08C09J11/04B32B2260/026B32B2260/04B32B2260/046C08K2201/011C08K2003/2241C08K2201/003C08K2003/2227C08L29/04C08K3/22C08K5/17C08K3/36
Inventor 徐建峰刘如龙玲
Owner RES INST OF FORESTRY NEW TECH CHINESE ACAD OF FORESTRY
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