Production method for adhesive-free straw density board

A production method and density board technology, applied in the field of board manufacturing, can solve the problems of reduced wood supply, low cost and price, and low strength, and achieve the effects of simple production process, no formaldehyde release, and high strength

Active Publication Date: 2017-05-31
王从容
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Density board, also known as fiberboard, is a board made of wood fiber or other plant fiber and applied with urea-formaldehyde resin or other adhesives. Such a board will release a large amount of formaldehyde that endangers human health, and it is difficult to recycle and reuse. Afterwards, it cannot be degraded naturally, which increases the social and environmental hazards. Now the fiberboards on the market are all made of tree branches, which are low in cost and price; but the wood growth cycle is long, and the supply of wood is decreasing year by year; It is cut into flakes, and then rubbed into fine fibers by a thread rolling machine. During the process of thread rolling, urea-formaldehyde glue is mixed, and then evenly spread into plates and formed by hot pressing.
Such fiberboard has poor toughness and low strength, and is used for one-time highway use

Method used

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  • Production method for adhesive-free straw density board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] See figure 1 , A production method of no-adhesive straw density board, the specific steps are as follows:

[0019] 1) The wheat straw is evenly cut into small sections with a length of 8cm through the grass cutter 1;

[0020] 2) The short sections of wheat straw stalks are pre-soaked in the alkaline extractant solution through the reaction chamber 2 and placed for 1 hour, so that the medicinal solution can fully penetrate into the straws, so that the cellulose, hemicellulose and lignin can be fully dissolved and separated;

[0021] 3) The wheat straw stalks are divided into filaments and broomed by the refining machine 3 which integrates, rubbing, pressing and dividing, and refined into complete fine fibers, and then the fibers are transported to the hanger 4;

[0022] 4) It is then flattened and formed by the rotary screen 5, and then formed by hot pressing and drying by the hot press 6 to form a plate, and finally finished and shaped by the sawing machine 7.

[0023] The basic...

Embodiment 2

[0025] See figure 1 , A production method of no-adhesive straw density board, the specific steps are as follows:

[0026] 1) The wheat straw is evenly cut into small sections with a length of 8.5cm through the grass cutter 1;

[0027] 2) The short sections of wheat straw stalks are pre-soaked in the alkaline extractant solution through the reaction chamber 2 and placed for 1.2h, so that the medicinal solution can fully penetrate into the straws, so that the cellulose, hemicellulose and lignin can be fully dissolved and separated;

[0028] 3) The wheat straw stalks are divided into filaments and broomed by the refining machine 3 which integrates, rubbing, pressing and dividing, and refined into complete fine fibers, and then the fibers are transported to the hanger 4;

[0029] 4) It is then flattened and formed by the rotary screen 5, and then formed by hot pressing and drying by the hot press 6 to form a plate, and finally finished and shaped by the sawing machine 7.

[0030] The basic...

Embodiment 3

[0032] See figure 1 , A production method of no-adhesive straw density board, the specific steps are as follows:

[0033] 1) The wheat straw is evenly cut into small pieces with a length of 9cm through the grass cutter 1;

[0034] 2) The short section of wheat straw straw is pre-soaked in the alkaline extractant solution through the reaction chamber 2 and placed for 1.5h, so that the drug solution can fully penetrate into the straw, so that the cellulose, hemicellulose and lignin can be fully dissolved and separated;

[0035] 3) The wheat straw stalks are divided into filaments and broomed by the refining machine 3 which integrates, rubbing, pressing and dividing, and refined into complete fine fibers, and then the fibers are transported to the hanger 4;

[0036] 4) It is then flattened and formed by the rotary screen 5, and then formed by hot pressing and drying by the hot press 6 to form a plate, and finally finished and shaped by the sawing machine 7.

[0037] The basic refining age...

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Abstract

The invention discloses a production method for an adhesive-free straw density board. The production method for the adhesive-free straw density board comprises the following steps: cutting wheat straw to be small pieces; pre-soaking in an alkaline extraction agent and placing for 1-2 h; executing separating brooming to the wheat straw by a twisting separating integrated extraction machine, sending to a pulp hanging machine after extracting to be complete fine fibers; flat-forming by a circular net, hot-press-forming by a hot press machine, and drying to form the board, finishing and shaping by an edge saw. Any adhesives are not added in the process, the straw fibers are interweaved by itself completely, and the straw contains one adhesive, the straw is adhered to form the board by the efficacy of the adhesive contained in the straw in the hot press process, and the board has the advantages of high strength, good toughness and non-formaldehyde release. The method has the characteristics of low cost, large production, and simple manufacturing process.

Description

Technical field [0001] The invention relates to the technical field of plate manufacturing, in particular to a production method of a binder-free straw density board. Background technique [0002] Density board, also known as fiberboard, is a board made of wood fiber or other plant fibers and applied with urea-formaldehyde resin glue or other adhesives. Such a board will release a large amount of formaldehyde and endanger human health. It is difficult to recycle and discard. Later, it cannot be degraded naturally, increasing the social and environmental hazards. Now the fiberboards on the market use tree branches as raw materials. This material has a low cost and low price. However, the wood growth cycle is long and the wood supply is decreasing year by year; the wood is directly passed through the chipper It is cut into flakes, and then twisted into small fibers by a thread rolling machine. During the thread rolling process, urea-formaldehyde glue is mixed and then evenly spread...

Claims

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Application Information

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IPC IPC(8): D21J1/00D21J1/04D21B1/02D21B1/30
CPCD21B1/021D21B1/30D21J1/00D21J1/04
Inventor 王从容
Owner 王从容
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