Method for producing bark mixed medium-density fiber plate

A production method and technology of bark fiber, applied in the field of bark mixed medium density fiberboard, can solve the problems of hydrolytic denaturation, inapplicability of separating bark fiber, and low utilization rate of bark, so as to reduce sewage discharge and improve comprehensive utilization rate , the effect of reducing the amount of glue used

Inactive Publication Date: 2012-08-22
饶显生
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Fibers are separated by thermal grinding, that is, wood chips are boiled at high temperature to soften and then polished to separate wood fibers from wood. However, since the "thermal grinding" process is carried out under high temperature and high humidity conditions, it is very easy to cause bark Hydrolytic denaturation of the main fiber components in bark such as bast fibers and hemi-fibers, the utilization rate of bark is extremely low, so it is not suitable for separating bark fibers

Method used

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  • Method for producing bark mixed medium-density fiber plate
  • Method for producing bark mixed medium-density fiber plate
  • Method for producing bark mixed medium-density fiber plate

Examples

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no. 1 example

[0027] see figure 1 , is the first embodiment of the production method of bark mixed medium density fiberboard of the present invention, the production method of this bark mixed medium density fiberboard comprises the following steps:

[0028] 1. First use 10% acetic acid solution to dissolve the natural cement in the bark. After the natural cement in the bark is removed, the bark fibers can be separated more easily.

[0029] 2. Since the fir bark fiber components have the characteristics of low lateral bonding strength, the bark fibers can be separated by mechanical high-speed rubbing and separation under normal temperature drying conditions with a temperature range of 5°C to 30°C.

[0030] 3. Drying the separated bark fibers subsequently, so that the moisture content of the dried bark fibers is controlled within the range of 12% to 15%.

[0031] 4. Add sawdust fibers to the dried bark fibers, stir and mix thoroughly, so that the mixed bark fiber content is ≥ 40%, and the sa...

no. 2 example

[0036] see figure 2 , is the second embodiment of the production method of bark mixed medium density fiberboard of the present invention, the production method of this bark mixed medium density fiberboard comprises the following steps:

[0037] 1'. First cut the bark into sheet bark of uniform specification, the natural thickness of the sheet bark is ≤ 1mm, the length is 0.5cm ~ 1cm, and the width is ≤ 3mm.

[0038] 2'. Use acetic acid solution with 10% acetic acid content to process and dissolve the natural cement in the flaky bark. After the natural cement in the flaky bark is removed, the bark fibers can be separated more easily.

[0039] 3'. Since the fir bark fiber components have the characteristics of low lateral bonding strength, the bark fibers can be separated by mechanical high-speed rubbing and separation under normal temperature drying conditions with a temperature range of 5°C to 30°C.

[0040] 4'. drying the bark fiber after separation subsequently, the moistu...

no. 3 example

[0046] see image 3 , is the third embodiment of the production method of bark mixed medium density fiberboard of the present invention, the production method of this bark mixed medium density fiberboard comprises the following steps:

[0047] 1". Firstly cut the bark into sheet-like bark with uniform specifications, the natural thickness of the sheet-like bark is ≤1mm, the length is 0.5cm-1cm, and the width is ≤3mm.

[0048] 2". Use an acetic acid solution with an acetic acid content of 10% to dissolve the natural cement in the flaky bark. After removing the natural cement in the flaky bark, the bark fibers can be separated more easily.

[0049] 3". Since the fir bark fiber components have the characteristics of low lateral bonding strength, the bark fibers are separated by mechanical high-speed rubbing and separation under normal temperature drying conditions with a temperature range of 5°C to 30°C.

[0050] 4". Then dry the separated bark fibers, so that the moisture conte...

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Abstract

The invention discloses a method for producing a bark mixed medium-density fiber plate, which comprises the following steps of: dissolving natural cement in barks with acid solution; separating bark fibers in a mechanical high-speed rubbing separation manner, namely a normal-temperature mechanical process, under a drying condition of the temperature range of 5 to 30 DEG C; oven-drying the separated bark fibers; adding a wood fiber material into the oven-dried bark fibers and fully mixing and blending, wherein the bark fiber content after mixing is more than or equal to 40 percent; preparing amixed raw material from the bark fibers, the wood fiber material and glue by adopting a blast air glue injecting process when the raw materials are stirred and blended; and spreading the mixed raw material into a plate shape, molding and hot pressing to form plates. When the method is used for manufacturing the medium-density fiber plate, the resources of the production raw materials of the medium-density fiber plate are widened, and wastes are changed into valuable materials, so that the comprehensive utilization rate of forest resources is greatly improved and the manufacturing cost of the medium-density fiber plate is reduced.

Description

technical field [0001] The invention relates to the technical field of medium-density fiberboard manufacturing, in particular to a production method of a bark-mixed medium-density fiberboard and a bark-mixed medium-density fiberboard manufactured by the production method. Background technique [0002] Medium density fiberboard is made of wood, which is the most effective method of wood fiber separation at present, after the wood chips are cooked and softened at high temperature by the "hot grinding method", so as to achieve the purpose of separating fibers from wood. A type of wood-based panel that is then bonded with an adhesive and pressed into shape. For example, the invention application with the application number CN99115071 mentioned a kind of technology of using salix salix as raw material dry method to produce medium density fiberboard. Medium density fiberboard is produced through a series of processes such as pipeline sizing method and hot pressing. [0003] Fibe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/08
Inventor 饶显生赖泽明
Owner 饶显生
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