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Preparation method of environment-friendly three-ply board

A production method and technology of plywood, which are applied in the field of wood processing, can solve the problems of low bonding strength and poor water resistance, and achieve the effects of high bonding strength, improved overall performance and low peel strength.

Inactive Publication Date: 2019-10-18
SUINING PENGXIANG WOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the adhesives used in the prior art contain formaldehyde, and the adhesives without formaldehyde can be natural polymers, mainly soybean protein adhesives, etc., but this adhesive has low bonding strength and poor water resistance. shortcoming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for making an environment-friendly plywood, comprising the steps of:

[0025] (1) Wood is placed in hot steam for 6 hours;

[0026] (2) peel off the bark;

[0027] (3) timber is rotary-cut into planks;

[0028] (4) placing the wood in a drier with a relative air humidity of 10%, with a temperature of 60°C and a wind speed of 15m / s to dry the wood to a moisture content of 23%;

[0029] (5) Repair and arrange the badly shaped planks;

[0030] (6) Apply the adhesive to the surface of the wood to form a glue layer, and the coating amount of the adhesive is 500g / m 2 ; The adhesive is made up of the following raw materials in parts by mass: 70 parts of phenolic glue, 35 parts of soybean protein glue, 40 parts of polyvinyl alcohol, 8 parts of starch, 5 parts of borax, 10 parts of sodium hydroxide and 35 parts of talcum powder .

[0031] (7) In the tissue culture process, the angle between the fibers of the two planks is 60 degrees, and the number of layers of the...

Embodiment 2

[0045] A method for making an environment-friendly plywood, comprising the steps of:

[0046] (1) placing the wood in hot steam for 4 hours;

[0047] (2) peel off the bark;

[0048] (3) timber is rotary-cut into planks;

[0049] (4) placing the wood in a drier with a relative air humidity of 10%, drying the wood to a moisture content of 15% at a temperature of 50°C and a wind speed of 5m / s;

[0050] (5) Repair and arrange the badly shaped planks;

[0051] (6) Apply the adhesive to the surface of the wood to form a glue layer, and the coating amount of the adhesive is 500g / m 2 ; The adhesive is made up of the following raw materials in parts by mass: 40 parts of phenolic glue, 10 parts of soybean protein glue, 15 parts of polyvinyl alcohol, 2 parts of starch, 2 parts of borax, 4 parts of sodium hydroxide and 15 parts of talcum powder .

[0052] (7) In the tissue culture process, the angle between the fibers of the two planks is 60 degrees, and the number of layers of the b...

Embodiment 3

[0066] A method for making an environment-friendly plywood, comprising the steps of:

[0067] (1) placing the wood in hot steam for 5 hours;

[0068] (2) peel off the bark;

[0069] (3) timber is rotary-cut into planks;

[0070] (4) placing the wood in a drier with a relative air humidity of 10%, drying the wood to a moisture content of 10% at a temperature of 55° C. and a wind speed of 10 m / s;

[0071] (5) Repair and arrange the badly shaped planks;

[0072] (6) Apply the adhesive to the surface of the wood to form a glue layer, and the coating amount of the adhesive is 500g / m 2 ; The adhesive is made up of the following raw materials in parts by mass: 50 parts of phenolic glue, 20 parts of soybean protein glue, 30 parts of polyvinyl alcohol, 5 parts of starch, 4 parts of borax, 8 parts of sodium hydroxide and 25 parts of talcum powder .

[0073] (7) In the tissue culture process, the angle between the fibers of the two planks is 60 degrees, and the number of layers of t...

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Abstract

The invention relates to a preparation method of an environment-friendly three-ply board, and belongs to the technical field of wood processing. According to the preparation method of the environment-friendly three-ply board, the use amount of phenolic glue is reduced, so that the release amount of formaldehyde is reduced, and a plurality of kinds of glue cooperate with one another, so that the environmental friendliness, the gluing property, the water resistance, the impact resistance and the like of special glue are improved. The phenolic glue has the advantages of good adhesion to wood, high bonding strength, high heat resistance, good creep resistance, ablation resistance, good dimensional stability and the like, but also has the disadvantages of high formaldehyde content, large brittleness, low peel strength and low impact resistance; soybean protein glue is a kind of novel green environment-friendly glue and does not contain formaldehyde; and the soybean protein glue is a renewable resource, the residue of soybean processing is effectively utilized, resources are comprehensively utilized, and the production cost is saved.

Description

technical field [0001] The invention relates to the technical field of wood processing, in particular to a manufacturing method of an environment-friendly plywood. Background technique [0002] Plywood is made of three layers of veneer made of different materials. Since the adhesive containing formaldehyde is used in the production, the use of plywood to make furniture will release formaldehyde. In addition to causing respiratory and nervous system diseases, such as cough, sore throat, chest tightness, dizziness, nausea, limb weakness, dyspnea, lethargy and other symptoms, formaldehyde can also induce the development of cancers such as nose cancer, throat cancer, skin cancer and leukemia. occur. [0003] Most of the adhesives used in the prior art contain formaldehyde, and the adhesives without formaldehyde can be natural polymers, mainly soybean protein adhesives, etc., but this adhesive has low bonding strength and poor water resistance. shortcoming. Therefore, it is v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08C09J161/06C09J189/00C09J129/04C09J103/02C09J11/04
CPCB27D1/08C08K2003/387C08L2205/035C09J11/04C09J161/06C08L89/00C08L29/04C08L3/02C08K3/38C08K3/22C08K3/34
Inventor 汤灿
Owner SUINING PENGXIANG WOOD
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