Formaldehyde-free impregnating adhesive for decorative paper and preparation method thereof

A decorative paper and adhesive technology, used in special paper, papermaking, paper and other directions, can solve the problems of poor scratch resistance, high degree of cross-linking, inability to achieve gloss and fullness, and improve scratch resistance. performance, solve the damage between paper, improve the effect of glue hanging

Active Publication Date: 2022-05-27
中国林业科学研究院生态保护与修复研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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.
Compared with the traditional urea-formaldehyde glue and melamine-formaldehyde glue, the decorative paper impregnated with this kind of adhesive has a low glue content and poor physical properties, especially poor scratch resistance, low hardness, glossiness and plumpness. It meets the requirements of the relevant national standards, and because the glue is difficult to penetrate into the paper layer, there is a defect of peeling between the decorative paper and the paper

Method used

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  • Formaldehyde-free impregnating adhesive for decorative paper and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Add all pH adjusters and deionized water, 1 / 3 soft monomer, 1 / 3 hard monomer, 1 / 3 initiator and all emulsifiers into the reactor, and the stirring paddle is at an angle of 50° to the horizontal plane. The height of the leaves from the bottom of the reaction vessel is 1 / 2 of the height of the liquid surface, the stirring speed is 200 r / min, and the reaction is stopped immediately after the blue light appears to prepare the pre-emulsion.

[0031] 2) Mix the remaining amount of soft monomer and hard monomer evenly, and add the remaining amount of initiator to the pre-emulsion dropwise at 85°C, and heat up to 85°C under stirring, with a stirring speed of 150r / min After 30min dripping, the stirring paddle was always kept at an angle of 50° with the horizontal plane during the dripping process, and the height of the paddle from the bottom of the reaction vessel was 1 / 2 of the liquid level height.

[0032] 3) A formaldehyde-free adhesive for decorative paper, according to t...

Embodiment 2

[0042] 1) Add all pH adjusters and deionized water, 1 / 3 soft monomer, 1 / 3 hard monomer, 1 / 3 initiator and all emulsifiers into the reactor, and the stirring paddle forms an angle of 60° with the horizontal plane. The height of the leaf from the bottom of the reaction vessel is 1 / 3 of the height of the liquid surface, the stirring speed is 150 r / min, and the reaction is stopped immediately after the blue light appears to prepare the pre-emulsion.

[0043] 2) Mix the remaining soft monomer and hard monomer evenly, and add the remaining amount of initiator dropwise to the pre-emulsion under the condition of 85 ℃, and heat up to 85 ℃ under stirring, and the stirring speed is 100r / min After 30min dripping, the stirring paddle was always kept at an angle of 60° with the horizontal plane during the dripping process, and the height of the paddle from the bottom of the reaction vessel was 1 / 3 of the liquid level height.

[0044] 3) A formaldehyde-free adhesive for decorative paper, acc...

Embodiment 3

[0054] 1) Add all pH adjusters and deionized water, 1 / 3 soft monomer, 1 / 3 hard monomer, 1 / 3 initiator and all emulsifiers into the reactor, and the stirring paddle is at a 50° angle to the horizontal plane. The height of the leaves from the bottom of the reaction vessel is 1 / 2 of the height of the liquid surface, the stirring speed is 180 r / min, and the reaction is stopped immediately after the blue light appears to prepare the pre-emulsion.

[0055] 2) Mix the remaining soft monomer and hard monomer evenly, add the remaining amount of initiator to the pre-emulsion dropwise at 85°C, and heat up to 85°C under stirring, with a stirring speed of 120r / min After 30min dripping, the stirring paddle was always kept at an angle of 50° with the horizontal plane during the dripping process, and the height of the paddle from the bottom of the reaction vessel was 1 / 2 of the liquid level height.

[0056] 3) A formaldehyde-free adhesive for decorative paper, according to the following formu...

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Abstract

The invention claims to protect a formaldehyde-free impregnated adhesive for decorative paper whose physical strength meets the national standard and its preparation method. The formaldehyde-free adhesive includes the following components: 40-60 parts of water-based acrylic emulsion, 5-15 parts of organic amine , 1-5 parts of crosslinking agent, 1-5 parts of polyvinyl alcohol, 5-10 parts of filler and 5-10 parts of water. The formaldehyde-free adhesive prepared by this application has no formaldehyde release, is safe and environmentally friendly, and the water-based acrylate emulsion The particle size is small, the molecular weight is small, and the viscosity is moderate, so that the impregnated adhesive can penetrate into the interior of the paper well, which solves the problem of inter-paper damage of the decorative paper after the ordinary resin adhesive is impregnated. The introduced organic amine, polyethylene Glycol, polyvinyl alcohol reacted with acrylate resin, and the adhesive content and physical strength of the prepared adhesive-impregnated decorative paper were higher than those of the pure resin adhesive-impregnated decorative paper, which met the requirements of the national standard.

Description

technical field [0001] The invention relates to an aldehyde-free impregnating adhesive for decorative paper and a preparation method thereof, belonging to the technical field of wood-based panel processing. Background technique [0002] Decorative paper is an important wood-based panel facing material, which protects and beautifies the artificial paper and its products. Generally, decorative paper is printed and impregnated from decorative base paper. For a long time, the dipping process of decorative paper mostly adopts two-stage dipping process of urea-formaldehyde glue and melamine-formaldehyde glue, and the produced decorative paper veneer wood-based panel products have excellent physical properties such as hardness, wear resistance and scratch resistance. However, this traditional dipping method will release free formaldehyde during production and product use, which will cause harm to the health of operators and consumers. With the improvement of people's requirements...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/22D21H23/32D21H17/37D21H17/07D21H17/36D21H17/67D21H17/53C08F220/14C08F220/18C08F220/06C08F220/46B27D1/00B27D1/08
CPCD21H27/22D21H23/32D21H17/37D21H17/07D21H17/36D21H17/675D21H17/53C08F220/14C08F220/18C08F220/06C08F220/46B27D1/00B27D1/08C08F220/1804C08F220/1802C08F220/1808
Inventor 刘如徐建峰龙玲
Owner 中国林业科学研究院生态保护与修复研究所
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