Adhesive capable of improving compression resistance of plywood and preparation method of adhesive

A technology of compressive properties and adhesives, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve the problems of insufficient bonding strength and compressive properties of plywood, and improve flexibility and bond strength , Increase the effect of bonding strength

Active Publication Date: 2021-11-23
广西完美木业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adhesive made is green, environmentally friendly, formaldehyde-free, and has a wide range of raw materials, easy to obtain, and low cost, but the glued strength of the used plywood is not enough, and the compression resistance is not enough

Method used

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  • Adhesive capable of improving compression resistance of plywood and preparation method of adhesive
  • Adhesive capable of improving compression resistance of plywood and preparation method of adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An adhesive that can improve the compression resistance of plywood is prepared from the following raw materials in parts by weight: 20 parts of formaldehyde, 250 parts of melamine, 150 parts of ammonia water, 300 parts of urea, 3 parts of polyvinyl alcohol, and modified graphene 4 parts, 6 parts of silicate-containing inorganic fillers obtained by mixing talc powder and zeolite powder at a mass ratio of 2:1.

[0029] The preparation method of the modified graphene is as follows: dissolving aminosilane in water, adding graphene, adding graphene, condensing and refluxing, washing with deionized water, and drying at 50°C to obtain modified graphene.

[0030] A preparation method of an adhesive capable of improving the compressive properties of plywood, comprising the following steps:

[0031] S1: Prepare formaldehyde into an aqueous formaldehyde solution with a mass fraction of 30%, add modified graphene, and disperse ultrasonically for 30 minutes at a power of 200w;

[0...

Embodiment 2

[0036] An adhesive that can improve the compression resistance of plywood, prepared from the following raw materials in parts by weight: 10 parts of formaldehyde, 200 parts of melamine, 250 parts of ammonia water, 350 parts of urea, 2 parts of polyvinyl alcohol, modified graphene 2 parts, 4 parts of silicate-containing inorganic fillers obtained by mixing talc powder and zeolite powder at a mass ratio of 2:1.

[0037] The preparation method of the modified graphene is as follows: dissolving aminosilane in water, adding graphene, condensing and refluxing, washing with deionized water, and drying at 60°C to obtain the modified graphene.

[0038] A preparation method of an adhesive capable of improving the compressive properties of plywood, comprising the following steps:

[0039] S1: Prepare formaldehyde into a formaldehyde aqueous solution with a mass fraction of 35%, add modified graphene, and disperse ultrasonically for 40 minutes at a power of 300w;

[0040] S2: adjust the ...

Embodiment 3

[0044] An adhesive that can improve the compression resistance of plywood is prepared from the following raw materials in parts by weight: 30 parts of formaldehyde, 250 parts of melamine, 200 parts of ammonia water, 450 parts of urea, 2 parts of polyvinyl alcohol, and modified graphene 3 parts, 5 parts of silicate-containing inorganic fillers obtained by mixing talc powder and zeolite powder at a mass ratio of 2:1.

[0045] The preparation method of the modified graphene is as follows: dissolving aminosilane in water, adding graphene, condensing and refluxing, washing with deionized water, and drying at 55°C to obtain the modified graphene.

[0046] A preparation method of an adhesive capable of improving the compressive properties of plywood, comprising the following steps:

[0047] S1: Prepare formaldehyde into a formaldehyde aqueous solution with a mass fraction of 40%, add modified graphene, and disperse ultrasonically for 35 minutes at a power of 500w;

[0048] S2: adjus...

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Abstract

The invention discloses an adhesive capable of improving the compression resistance of plywood. The adhesive is prepared from the following raw materials in parts by weight: 10-30 parts of formaldehyde, 150-250 parts of melamine, 150-250 parts of ammonia water, 300-450 parts of urea, 1-3 parts of polyvinyl alcohol, 2-4 parts of modified graphene and 4-6 parts of silicate-containing inorganic filler. The preparation method comprises the following steps: S1, using formaldehyde to prepare a formaldehyde aqueous solution, adding modified graphene, and carrying out ultrasonic dispersion; S2, adjusting pH, conducting heating, and adding a first part of urea, melamine and ammonia water for a reaction; S3, adjusting the pH value, adding a second part of urea, and conducting stirring; and S4, adding a third part of urea, polyvinyl alcohol and silicate for reaction, adjusting the pH value, naturally conducting cooling to normal temperature, and conducting dehydrating to obtain the adhesive. The adhesive prepared by the invention is used for the plywood, the bonding strength of the plywood can be remarkably improved, and the plywood is excellent in mechanical property and high in compression resistance.

Description

technical field [0001] The invention belongs to the technical field of adhesive preparation, and in particular relates to an adhesive capable of improving the compressive performance of plywood and a preparation method thereof. Background technique [0002] Plywood is a three-layer or multi-layer board-like material that is made of wood sections that are peeled into veneers or sliced ​​into thin wood, and then glued with adhesives. Usually, odd-numbered veneers are used, and adjacent layers of veneers are used. The fiber directions are glued perpendicular to each other. [0003] The compressive performance and bonding strength of plywood are directly related to the adhesive. Domestic patent literature (publication number: CN108517184A) discloses an adhesive for plywood. Its components are: starch 40-60 10-20 parts of polyvinyl alcohol, 5-15 parts of ammonium persulfate, 5-15 parts of bio-oil, 4-10 parts of strong acid, 1-7 parts of strong alkali, and 1-7 parts of acrylamide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/32C09J11/04C08G12/40C08G12/38
CPCC09J161/32C09J11/04C08G12/40C08G12/38C08K9/06C08K3/042C08K3/34C08K7/26Y02W30/91
Inventor 潘甲贵
Owner 广西完美木业集团有限公司
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