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Method for producing thick-core plywood using formaldehyde-free biomass soybean protein adhesive

A technology of soybean protein and biomass, which is applied in the field of wood processing, can solve the problems of poor static bending strength of thick core boards, no obvious breakthrough of veneers, and large cracks on the back of veneers, so as to achieve high bonding strength and improve raw material utilization The effect of high-efficiency and high-efficiency linear sizing

Active Publication Date: 2018-01-09
SHANDONG XINGANG ENTERPRISE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The development of thick core plywood is accompanied by the development of rotary cutting technology. In the traditional sense of thick core structure, the thickness of the core veneer is usually much greater than the thickness of the surface veneer, and the thickness of the veneer itself is not There is no obvious breakthrough (usually less than 2mm). At present, the thickness of poplar veneer is generally less than 3mm. Although thick veneer rotary cutting equipment has been developed that can peel veneer above 6mm, the back of the veneer has large cracks. , Serious wire gnawing, large thickness deviation, veneer is prone to cracking during rotary cutting and drying, and the product is prone to warping and deformation after hot pressing, and the static bending strength and elastic modulus of traditional thick core boards are poor. In addition, due to Most of the traditional thick-core plywood uses aldehyde-based adhesives, resulting in a large amount of formaldehyde release, so the application of traditional thick-core plywood is greatly limited
[0003] In order to utilize wood resources more efficiently and solve the environmental problem of free formaldehyde release caused by the use of aldehyde-based adhesives in plywood, the present invention proposes a plywood manufacturing unit by rotary-cutting thick (3-10mm) veneers, using Method for producing thick-core plywood with modified soybean protein as adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The method for producing thick-core plywood using the formaldehyde-free biomass soybean protein adhesive comprises the following steps:

[0034] (1) rotary cutting: put the wood section into the rotary cutting machine and rotary cut it into a veneer with a thickness of 3mm;

[0035] (2) Drying: Put the rotary-cut veneer into a dryer, laminate and dry, the drying temperature is 80°C, and the drying time is 10 minutes;

[0036] (3) Plasma treatment: put the dried veneer into the plasma treatment machine, and set the feeding speed to 5m / min for plasma treatment;

[0037] (4) Scratch treatment on the surface of the veneer: scratch the surface of the veneer along the length direction on the side without cracks on the back, the angle between the scratch and the length direction of the veneer is 15°, two scratches The interval between them is 10cm;

[0038] (5) Sizing: use formaldehyde-free biomass soybean protein adhesive, and use a frosted roller glue machine to sizing the...

Embodiment 2

[0042] The method for producing thick-core plywood using the formaldehyde-free biomass soybean protein adhesive comprises the following steps:

[0043] (1) wood segment pretreatment: put the wood segment into a sodium silicate solution with a mass concentration of 10.5% and soak for 72 hours;

[0044] (2) rotary cutting: put the soaked wood section into a rotary cutting machine and rotary cut it into a veneer with a thickness of 10mm;

[0045] (3) Drying: put the rotary-cut veneer into a dryer, laminate and dry, the drying temperature is 150°C, and the drying time is 20 minutes;

[0046] (4) Plasma treatment: put the dried veneer into the plasma treatment machine, set the feeding speed to 15m / min for plasma treatment;

[0047] (5) Scratch treatment on the surface of the veneer: scratch the surface of the veneer along the length direction on the side without cracks on the back, the angle between the scratch and the length direction of the veneer is 60°, two scratches The inte...

Embodiment 3

[0052] The method for producing thick-core plywood using the formaldehyde-free biomass soybean protein adhesive comprises the following steps:

[0053] (1) wood segment pretreatment: put the wood segment into a sodium silicate solution with a mass concentration of 5% and soak for 40 hours;

[0054] (2) Rotary cutting: put the soaked wood section into a rotary cutting machine and rotary cut it into a veneer with a thickness of 8mm;

[0055] (3) Drying: put the rotary-cut veneer into a dryer, laminate and dry, the drying temperature is 100°C, and the drying time is 15 minutes;

[0056] (4) Plasma treatment: put the dried veneer into the plasma treatment machine, set the feeding speed to 10m / min for plasma treatment;

[0057] (5) Scratch treatment on the surface of the veneer: scratch the surface of the veneer along the length direction on the side without cracks on the back. The angle between the scratch and the length direction of the veneer is 45°, and two scratches The inte...

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Abstract

The invention discloses a method for producing thick-core plywood by using aldehyde-free biomass soy protein adhesive, belongs to the technical field of wood processing, and solves such problems as large back surface cracks, moreburrs, high thickness deviation and easiness in deformation and bending. The production method comprises wood block pretreatment, rotary cutting, drying, plasma treatment, veneer surface scratch treatment, gluing, prepressing, hot pressing and after-treatment. The method is suitable for producing the aldehyde-free thick-core plywood, largely reduces the production cost, and improves the production efficiency.

Description

technical field [0001] The invention relates to a method for producing thick-core plywood by using an formaldehyde-free biomass soybean protein adhesive, which belongs to the technical field of wood processing. Background technique [0002] The development of thick core plywood is accompanied by the development of rotary cutting technology. In the traditional sense of thick core structure, the thickness of the core veneer is usually much greater than the thickness of the surface veneer, and the thickness of the veneer itself is not There is no obvious breakthrough (usually less than 2mm). At present, the thickness of poplar veneer is generally less than 3mm. Although thick veneer rotary cutting equipment has been developed that can peel veneer above 6mm, the back of the veneer has large cracks. , Serious wire gnawing, large thickness deviation, veneer is prone to cracking during rotary cutting and drying, and the product is prone to warping and deformation after hot pressing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/08B32B37/06B32B37/10B32B37/12
CPCB27D1/08B32B37/06B32B37/10B32B37/12
Inventor 魏孝新崔效倍赵芸萱杨春闵德秀
Owner SHANDONG XINGANG ENTERPRISE GRP CO LTD
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