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Modified polyvinyl alcohol adhesive for plywood

A technology of polyvinyl alcohol glue and polyvinyl alcohol, which is applied in the field of plywood, can solve the problems of high transverse grain tensile strength, small deformation of plywood, easy degumming of plywood, etc., to improve the bonding strength, not easy to gather, and solve the problem of large heat deformation Effect

Inactive Publication Date: 2019-02-01
含山县金中环装饰材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Plywood is an important type of wood-based panels. Due to the characteristics of small deformation, large format, inconvenient construction, not easy to warp, and high tensile strength of transverse grains, plywood is widely used in furniture, carriages, shipbuilding, military industry, packaging and other industrial sectors. It has been widely used. Plywood is made of wood veneers bonded together by adhesives, and then cold-pressed. It can be seen that the properties of adhesives have a great impact on the bond strength and service life of plywood. However, the existing Adhesives for plywood have average bonding strength to wood veneers, and plywood is easy to degumming after long-term use

Method used

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  • Modified polyvinyl alcohol adhesive for plywood
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Examples

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Effect test

Embodiment 1

[0017] A modified polyvinyl alcohol adhesive for plywood, made of the following ingredients in parts by weight: starch composite modified polyvinyl alcohol 85, activated nano zeolite powder 19, rosin resin 6, hydroxymethyl cellulose 6, fatty acid Sorbitan ester 3.5, deionized water 56.

[0018] Further, the preparation method of the starch composite modified polyvinyl alcohol comprises the following steps:

[0019] (1) Starch pretreatment: uniformly add starch in a mass ratio of 1:10 to polyoxometalate aqueous solution with a mass fraction of 6.5%, heat to 76°C, stir at 1200r / min for 40min, and then perform suction filtration. Dried to constant weight, that is;

[0020] (2) Starch compound modified polyvinyl alcohol: Dissolve polyvinyl alcohol in deionized water to prepare a polyvinyl alcohol aqueous solution with a mass fraction of 15%, then heat it to 55°C, and react the polyvinyl alcohol at a speed of 1800r / min. The aqueous solution was continuously stirred, and after sti...

Embodiment 2

[0028] A modified polyvinyl alcohol adhesive for plywood, made of the following components in parts by weight: starch composite modified polyvinyl alcohol 88, activated nano zeolite powder 24, rosin resin 8, hydroxymethyl cellulose 10, fatty acid Sorbitan ester 3.9, deionized water 60.

[0029] Further, the preparation method of the starch composite modified polyvinyl alcohol comprises the following steps:

[0030] (1) Starch pretreatment: uniformly add starch in a mass ratio of 1:10 to polyoxometalate aqueous solution with a mass fraction of 6.5%, heat to 76°C, stir at 1200r / min for 40min, and then perform suction filtration. Dried to constant weight, that is;

[0031] (2) Starch compound modified polyvinyl alcohol: Dissolve polyvinyl alcohol in deionized water to prepare a polyvinyl alcohol aqueous solution with a mass fraction of 15%, then heat it to 55°C, and react the polyvinyl alcohol at a speed of 1800r / min. The aqueous solution was continuously stirred, and after sti...

Embodiment 3

[0039] A modified polyvinyl alcohol adhesive for plywood, made of the following components in parts by weight: starch composite modified polyvinyl alcohol 86, activated nano-zeolite powder 21, rosin resin 7, hydroxymethyl cellulose 8, fatty acid Sorbitan ester 3.6, deionized water 58.

[0040] Further, the preparation method of the starch composite modified polyvinyl alcohol comprises the following steps:

[0041] (1) Starch pretreatment: uniformly add starch in a mass ratio of 1:10 to polyoxometalate aqueous solution with a mass fraction of 6.5%, heat to 76°C, stir at 1200r / min for 40min, and then perform suction filtration. Dried to constant weight, that is;

[0042] (2) Starch compound modified polyvinyl alcohol: Dissolve polyvinyl alcohol in deionized water to prepare a polyvinyl alcohol aqueous solution with a mass fraction of 15%, then heat it to 55°C, and react the polyvinyl alcohol at a speed of 1800r / min. The aqueous solution was continuously stirred, and after stir...

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Abstract

The present invention discloses a modified polyvinyl alcohol adhesive for plywood and relates to the technical field of plywood. The modified polyvinyl alcohol adhesive for the plywood is made of thefollowing components: starch composite modified polyvinyl alcohol, activated nano zeolite powder, rosin resin, hydroxymethyl cellulose, dehydrated sorbitol fatty acid ester and deionized water. The provided adhesive for the plywood has good water resistance and at the same time has a quick drying effect.

Description

technical field [0001] The invention belongs to the technical field of plywood, in particular to a modified polyvinyl alcohol adhesive for plywood. Background technique [0002] Plywood is an important type of wood-based panels. Due to the characteristics of small deformation, large format, inconvenient construction, not easy to warp, and high tensile strength of transverse grains, plywood is widely used in furniture, carriages, shipbuilding, military industry, packaging and other industrial sectors. It has been widely used. Plywood is made of wood veneers bonded together by adhesives, and then cold-pressed. It can be seen that the properties of adhesives have a great impact on the bond strength and service life of plywood. However, the existing Adhesives for high-quality plywood have average bond strength to wood veneers, and plywood is easy to degumming after long-term use. Contents of the invention [0003] The purpose of the present invention is to provide a modified ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04C09J103/02C09J11/04
CPCC08K2201/011C08K2201/014C08L2205/025C08L2205/035C09J11/04C09J129/04C08L3/02C08K13/06C08K9/04C08K3/34
Inventor 郭坤
Owner 含山县金中环装饰材料有限公司
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