Adhesive for plywood

A technology for adhesives and plywood, applied in the direction of adhesive additives, dextran adhesives, polymer adhesive additives, etc., can solve the problem of reducing the service life of plywood, high transverse grain tensile strength, and general bond strength and other problems, to achieve the effect of improving bonding strength, improving ductility and reducing hydrophilicity

Active Publication Date: 2017-12-08
阜南盛原木业有限公司
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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 m

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An adhesive for plywood, made of the following ingredients in parts by weight: konjac flour 60, vanillin grafted chitosan 15, acrylate crosslinked polyvinyl alcohol 25, glacial acetic acid 0.5, filler 12, water 55; When the plywood is prepared with an adhesive, it is mixed at a low speed in a low temperature section, then ultrasonically treated, and then stirred at a high speed in a high temperature section. The low temperature section does not exceed 10°C, and the low speed rotation speed does not exceed 150r / min. The high temperature section is not lower than 90°C, and the high speed speed is not lower than 2500r / min.

[0017] Further, the konjac flour is purified konjac flour, the content of glucomannan in the konjac flour is more than 82%, and the particle size is 500 mesh.

[0018] Further, the preparation method of the vanillin-grafted chitosan is as follows: 3g of chitosan and 100mL of isopropanol are mixed together, soaked for 2 hours at 50°C to obtain a chitosa...

Embodiment 2

[0026] An adhesive for plywood, made of the following ingredients in parts by weight: konjac powder 80, vanillin grafted chitosan 20, acrylate crosslinked polyvinyl alcohol 35, glacial acetic acid 0.7, filler 15, water 60; When the plywood is prepared with an adhesive, it is mixed at a low speed in a low temperature section, then ultrasonically treated, and then stirred at a high speed in a high temperature section. The low temperature section does not exceed 10°C, and the low speed rotation speed does not exceed 150r / min. The high temperature section is not lower than 90°C, and the high speed speed is not lower than 2500r / min.

[0027] Further, the konjac flour is purified konjac flour, the content of glucomannan in the konjac flour is more than 82%, and the particle size is 500 mesh.

[0028] Further, the preparation method of the vanillin-grafted chitosan is as follows: 3g of chitosan and 100mL of isopropanol are mixed together, soaked for 2 hours at 50°C to obtain a chitos...

Embodiment 3

[0036] An adhesive for plywood, made of the following ingredients in parts by weight: konjac powder 70, vanillin grafted chitosan 18, acrylate crosslinked polyvinyl alcohol 30, glacial acetic acid 0.6, filler 13, water 58; When the plywood is prepared with an adhesive, it is mixed at a low speed in a low temperature section, then ultrasonically treated, and then stirred at a high speed in a high temperature section. The low temperature section does not exceed 10°C, and the low speed rotation speed does not exceed 150r / min. The high temperature section is not lower than 90°C, and the high speed speed is not lower than 2500r / min.

[0037]Further, the konjac flour is purified konjac flour, the content of glucomannan in the konjac flour is more than 82%, and the particle size is 500 mesh.

[0038] Further, the preparation method of the vanillin-grafted chitosan is as follows: 3g of chitosan and 100mL of isopropanol are mixed together, soaked for 2 hours at 50°C to obtain a chitosa...

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Abstract

The invention discloses an adhesive for plywood and relates to the technical field of plywood preparation. The adhesive is prepared from the following components: konjaku flour, vanillic aldehyde grafted chitosan, acrylate crosslinked polyvinyl alcohol, glacial acetic acid, filler and water. The adhesive for plywood provided by the invention has high bonding strength, excellent ageing resistance and water resistance and capability of effectively prolonging the service life.

Description

technical field [0001] The invention belongs to the technical field of plywood preparation, and in particular relates to an 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, service life and aging resistance of plywood. , while the existing adhesives for plywood have average bonding strength to wood veneers and poor aging resistance, which greatly reduces the service life of plywood. Contents of the invention [0003] The object of the present invention...

Claims

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Application Information

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IPC IPC(8): C09J105/02C09J11/08C09J11/04
CPCC08K2201/011C08L2201/08C08L2205/03C09J11/04C09J11/08C09J105/02C08L5/08C08L51/003C08K9/04C08K3/346
Inventor 刘凯
Owner 阜南盛原木业有限公司
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