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Special adhesive for wood veneer board

A technology of wood plywood and glue, which is applied in the field of plywood, can solve the problems of easy cracking, water resistance, and poor adhesiveness of glue, and achieve the effects of high glue strength, good dispersion, and reduced production costs

Inactive Publication Date: 2017-08-22
贵港市鑫宏木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a special viscose adhesive for wood plywood, so as to overcome the disadvantages of poor viscose adhesiveness, easy cracking or poor water resistance.

Method used

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  • Special adhesive for wood veneer board
  • Special adhesive for wood veneer board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A special adhesive for wood plywood, mainly made of the following raw materials in parts by weight: 17 parts of mung bean starch, 11 parts of bisphenol A epoxy resin, 8 parts of modifier, 12 parts of urea, and 2 parts of formaldehyde , 3 parts of melamine rubber powder, 11 parts of lignin, 8 parts of biological enzyme, 7 parts of potassium hydrogen persulfate, 9 parts of polyglycidyl ether, 11 parts of chitosan, 4 parts of polyvinyl alcohol and 6 parts of sodium hexametaphosphate .

[0018] The biological enzyme is acid protease

[0019] The modifier is tributyl phosphate.

[0020] A kind of preparation method of the adhesive glue special for wood plywood, comprises the following steps:

[0021] (1) Mix formaldehyde and polyvinyl alcohol, adjust the pH value to 7.3, then add urea, raise the temperature to 52°C for 30 minutes, then raise the temperature to 90°C, add melamine rubber powder and react for 40 minutes to obtain slurry I;

[0022] (2) Mix mung bean starch w...

Embodiment 2

[0025] A special adhesive for wood plywood, mainly made of the following raw materials in parts by weight: 11 parts of mung bean starch, 6 parts of bisphenol A epoxy resin, 6 parts of modifier, 16 parts of urea, and 3 parts of formaldehyde , 4 parts of melamine rubber powder, 8 parts of lignin, 4 parts of biological enzyme, 9 parts of potassium hydrogen persulfate, 5 parts of polyglycidyl ether, 7 parts of chitosan, 7 parts of polyvinyl alcohol and 1 part of sodium hexametaphosphate .

[0026] The biological enzyme is a mixture of acid protease and cellulase, and the mixing ratio is 1:1.

[0027] The modifying agent is vinyl acetate.

[0028] A kind of preparation method of the adhesive glue special for wood plywood, comprises the following steps:

[0029] (1) Mix formaldehyde and polyvinyl alcohol, adjust the pH value to 7, then add urea, raise the temperature to 55°C for 20 minutes, then raise the temperature to 100°C, add melamine rubber powder and react for 30 minutes to...

Embodiment 3

[0033] A special adhesive for wood plywood, mainly made of the following raw materials in parts by weight: 22 parts of mung bean starch, 14 parts of bisphenol A epoxy resin, 11 parts of modifier, 8 parts of urea, and 1 part of formaldehyde , 2 parts of melamine rubber powder, 18 parts of lignin, 12 parts of biological enzyme, 4 parts of potassium hydrogen persulfate, 14 parts of polyglycidyl ether, 17 parts of chitosan, 3 parts of polyvinyl alcohol and 9 parts of sodium hexametaphosphate .

[0034] The biological enzyme is amylase.

[0035] The modifier is tributyl phosphate.

[0036] A kind of preparation method of the adhesive glue special for wood plywood, comprises the following steps:

[0037] (1) Mix formaldehyde and polyvinyl alcohol, adjust the pH value to 7.5, then add urea, raise the temperature to 50°C for 40 minutes, then raise the temperature to 85°C, add melamine rubber powder and react for 60 minutes to obtain slurry I;

[0038] (2) Mix mung bean starch with ...

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Abstract

The invention discloses an adhesive glue specially used for wood plywood, which is mainly made of the following raw materials: mung bean starch, bisphenol A epoxy resin, modifier, urea, formaldehyde, melamine rubber powder, lignin, biological enzyme, Potassium hydrogen sulfate, polyglycidyl ether, chitosan, polyvinyl alcohol and sodium hexametaphosphate. The adhesive glue special for wood plywood of the present invention has the advantages of strong adhesion, good modeling and dispersibility, and reduces the consumption of formaldehyde, and the free formaldehyde emission of the synthesized adhesive glue product reaches the EO level standard (≤ 0.5mg / L), reducing the emission of formaldehyde, no harm to the human body, belongs to the green environmental protection adhesive. High bonding strength and strong water resistance. The method for preparing the adhesive is simple, does not require very high equipment, and reduces production costs.

Description

technical field [0001] The invention relates to the field of plywood, in particular to a special adhesive for wood plywood. Background technique [0002] Wood plywood is a building material that is made of eucalyptus, poplar and other materials as the main structure and filling materials, and is formed into blanks by high pressure. Wood has high strength, good toughness, rigidity and wear resistance, and can be used as an excellent engineering structure material. The wood plywood formwork made of wood has good bending strength and rigidity, good overall structure, large format, convenient loading and unloading, easy demoulding, high construction efficiency, excellent technical quality and economic benefits. Wood plywood used in construction has high requirements on the strength and water resistance of the board. [0003] The information disclosed in this Background section is only for enhancing the understanding of the general background of the present invention and should...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/06C09J161/32C09J163/00C09J197/00C09J171/02C09J105/08C09J11/04C09J11/00C08G12/40C08G12/38C08B31/06C08B31/04
CPCC09J103/06C08B31/04C08B31/066C08G12/38C08G12/40C08L2205/035C09J11/00C09J11/04C09J161/32
Inventor 杨健杨金雄傅文森
Owner 贵港市鑫宏木业有限公司
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