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Preparation method of high-density fiberboard

A high-density fiberboard and fiber technology, applied in the field of fiberboard, can solve the problem of high dependence on pine wood, achieve the effects of easy industrial production, improve brittleness, and save energy

Pending Publication Date: 2021-12-07
广西上思华林林产工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now the most commonly used log is pine wood. When the pine wood material is not enough, it can be used with eucalyptus or other miscellaneous wood, but the content of pine wood is generally required to be greater than 50%, so the dependence on pine wood is too high

Method used

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  • Preparation method of high-density fiberboard

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method for high-density fiberboard, comprising the following steps:

[0029] S1. Slice the log material, and adjust the moisture content of the wood chips to 30-40%. The slicing process selects pine: eucalyptus = 1:1 as raw material for peeling and slicing.

[0030] S2. Preliminary softening of the wood chips, then cooking, and finally thermal grinding.

[0031] The preliminary softening is enzymatic hydrolysis with cellulase and xylanase for 3 hours. Based on the mass of wood chips, the enzyme dosage of cellulase is 20IU / g, and the dosage of xylanase is 10IU / g. Cellulase and xylanase are mixed, mixed with water at a mass ratio of 1:80-200 to form an enzymolysis solution, and evenly sprayed on wood chips for enzymolysis. The enzymolysis conditions are as follows: the temperature is 30°C.

[0032] During the cooking process, sodium carbonate and sodium bisulfite with 2% mass of wood chips are added to the cooking liquid as auxiliary agents. During the ...

Embodiment 2

[0040] A preparation method for high-density fiberboard, comprising the following steps:

[0041] S1. Slice the log material, and adjust the moisture content of the wood chips to 30-40%. The slicing process selects pine:eucalyptus=1:2 as raw material for peeling and slicing.

[0042] S2. Preliminary softening of the wood chips, then cooking, and finally thermal grinding.

[0043] The preliminary softening is enzymatic hydrolysis with cellulase and xylanase for 3 hours. Based on the mass of wood chips, the enzyme dosage of cellulase is 20IU / g, and the dosage of xylanase is 10IU / g. Cellulase and xylanase are mixed, mixed with water at a mass ratio of 1:80-200 to form an enzymolysis solution, and evenly sprayed on wood chips for enzymolysis. The enzymatic hydrolysis conditions are as follows: the temperature is 30°C.

[0044] During the cooking process, sodium carbonate and sodium bisulfite with 2% mass of wood chips are added to the cooking liquid as auxiliary agents. Durin...

Embodiment 3

[0052] A preparation method for high-density fiberboard, comprising the following steps:

[0053] S1. Slice the log material, and adjust the moisture content of the wood chips to 30-40%. The slicing process selects pine:eucalyptus=1:3 as raw material for peeling and slicing.

[0054] S2. Preliminary softening of the wood chips, then cooking, and finally thermal grinding.

[0055] The preliminary softening is enzymatic hydrolysis with cellulase and xylanase for 3 hours. Based on the mass of wood chips, the enzyme dosage of cellulase is 20IU / g, and the dosage of xylanase is 10IU / g. Cellulase and xylanase are mixed, mixed with water at a mass ratio of 1:80-200 to form an enzymolysis solution, and evenly sprayed on wood chips for enzymolysis. The enzymolysis conditions are as follows: the temperature is 30°C.

[0056] During the cooking process, sodium carbonate and sodium bisulfite with 2% mass of wood chips are added to the cooking liquid as auxiliary agents. During the coo...

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Abstract

The invention provides a preparation method of a high-density fiberboard, which comprises the following steps: S1, slicing a log material, and adjusting the moisture content of wood chips to 30-40%; S2, primarily softening the wood chips, then cooking and finally carrying out hot grinding, wherein in the primary softening, cellulase and xylanase are adopted for enzymolysis for 2-4 days; in the cooking process, sodium carbonate and sodium hydrogen sulfite accounting for 1-3% of the mass of the wood chips are added into cooking liquor to serve as auxiliaries; S3, carrying out glue mixing and applying procedures on the fibers subjected to hot grinding, and then drying; and S4, carrying out plate blank forming on the dried fibers, and then carrying out plate blank pre-pressing, hot pressing by a hot press and edge cutting to obtain the high-density fiberboard. According to the preparation method, the wood chips are primarily softened through enzymolysis, then the auxiliaries are added for cooking, then hot grinding is conducted, so that the fiber content can be increased, the fiber form and physical performance can be improved, and therefore, the performance of the fiberboard is improved.

Description

technical field [0001] The invention relates to the technical field of fiberboards, in particular to a method for preparing high-density fiberboards. Background technique [0002] High-density fiberboard is a board made of wood fiber or other plant fibers, applied with urea-formaldehyde resin, or other synthetic resins under heat and pressure. With its excellent physical properties, high-density fiberboard is compatible with all the advantages of MDF. It is widely used in indoor and outdoor decoration, office, high-end furniture, audio, and interior decoration of luxury cars. It can also be used as an antistatic floor for computer rooms. , Wall panels, anti-theft doors, wall panels, partitions and other production materials. It is also a good material for packaging. In recent years, instead of high-grade hardwood, it is directly processed into laminate flooring, laminate flooring, etc., and is widely used in interior decoration. Its smooth surface, solid texture, and long ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/12B27N3/20B27N3/18B27N1/02B27L11/08B27K5/06B27K5/00
CPCB27N3/12B27N3/203B27N3/18B27N3/183B27N1/0209B27L11/08B27K5/06B27K5/0085
Inventor 林桂成陈元坤潘光鹏韦华龙邓伟华黄城冯祖晓
Owner 广西上思华林林产工业有限公司
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