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Method for producing multi-layer board using poplar board, enzyme treated lumber and stalk fibre

A technology of straw fiber and wood fiber, which is applied in the bonding of wooden veneers, chemical instruments and methods, and manufacturing tools, etc., to achieve the effects of improved wetting performance, improved gluing performance, and improved gluing performance.

Inactive Publication Date: 2009-05-27
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, enzymatic treatment of wood and straw fiber to produce high-density fiberboard is blank. At present, all multi-layer boards are composed of poplar veneer, and there is no poplar veneer and high-density fiberboard preforms glued into multi-layer boards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1, concrete processing steps are as follows:

[0008] 1. Wood Fiber Manufacturing

[0009] The raw material is wood harvesting and processing residues. Using conventional technology, the raw material is first processed into wood chips, softened by cooking (softening temperature 160°C, softening time 4 minutes), and then heated and ground into fibers.

[0010] 2. Manufacture of straw fiber

[0011] The raw material is wheat straw and other crop straws. First, the straw is processed into 20mm straw units by a grass cutter, and then softened by cooking (softening temperature 105°C, softening time 10 minutes), and then heated and ground into fibers.

[0012] 3. Enzyme treatment of wood and straw fibers

[0013] Step 3 of the enzyme treatment of wood and straw fiber process, the weight ratio of wood and straw fiber (50:50 or 55:45 or 60:40), placed in the enzyme treatment reactor, 1kg of wood and straw fiber plus pH5. 0 citric acid-sodium dihydrogen phosphate b...

Embodiment 2

[0018] Embodiment 2, concrete processing steps are as follows:

[0019] 1. Wood Fiber Manufacturing

[0020] The raw material is wood harvesting and processing residues. Using conventional technology, the raw material is first processed into wood chips, softened by cooking (softening temperature 180°C, softening time 8 minutes), and then heated and ground into fibers.

[0021] 2. Manufacture of straw fiber

[0022] The raw material is wheat straw and other crop straws. First, the straw is processed into a 25mm straw unit by a grass cutter, and then softened by cooking (softening temperature 130°C, softening time 20 minutes), and then heated and ground into fibers.

[0023] 3. Enzyme treatment of wood and straw fibers

[0024] The weight ratio of wood and straw fiber is 50-60:40-50, (50:50 or 55:45 or 60:40) is placed in the enzyme treatment reactor, and 1 kg of wood and straw fiber is added with pH5.0 citric acid-phosphoric acid di Sodium hydrogen buffer solution 20kg, temp...

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Abstract

The invention relates to a method for manufacturing a multilayer board by a poplar veneer, enzyme treated wood and straw fiber. The method is characterized by comprising the following steps: (1) manufacturing wood fiber; (2) manufacturing the straw fiber; (3) processing the wood and the straw fiber by enzyme; (4) manufacturing a high-density fiber board; and (5) assembling and compregnating the poplar veneer and the fiber board into the multilayer board. The method has the advantages of improving the bonding performance by the enzyme treated wood and straw fiber, manufacturing the high-density fiber board by the enzyme treated wood and straw fiber, being capable of enlarging material sources of the multilayer board by manufacturing the multilayer board by replacing part of the veneers, and using the wood felling and processing remainders and crop straw materials. The enzyme treated wood and straw fiber improve the wetting property of the multilayer board (a surface contact angle is reduced by 10-20%), improve the bonding performance and reduces the application amount of urea formaldehyde resin adhesive by 6-8%. Generally, the application amount of urea formaldehyde resin adhesive is 10-14%.

Description

Technical field: [0001] The invention relates to a method for manufacturing multi-layer boards by using poplar veneer and enzyme-treated wood and straw fibers, and belongs to the technical field of wood-based board manufacturing. Background technique: [0002] At present in the technical field of wood-based panels, the method of manufacturing multi-layer panels is to process logs into veneers, and then form them through a certain process of forming blanks and gluing them. This product requires the use of logs with a certain diameter, and it is impossible to use wood harvesting and processing residues, as well as crop straw, so that the source of raw materials is limited to a certain extent. The invention uses enzymes to treat wood and straw fibers to produce high-density fiberboards, and replaces part of veneers to manufacture multilayer boards. The raw materials of wood and straw fiber include wood harvesting and processing residues, and crop straw. At present, there is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B32B21/13D21B1/14B27J1/00C12S3/08B27N1/00B27N1/02B27N3/04B27N3/08B27N3/10B27N3/18
Inventor 张洋周定国吴羽飞江华周兆兵贾翀黄润州刘艳萍沈竹
Owner NANJING FORESTRY UNIV
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