Dry manufacturing method for bagasse fiber board

A technology of bagasse fiber and hard fiberboard, which is applied in the direction of manufacturing tools, flat products, and pretreatment of molding materials. Performance and physical and mechanical properties, and the effect of preventing sewage pollution

Inactive Publication Date: 2010-06-23
王永
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Particleboard production avoids the pollution of wet fiberboard production, and can process man-made panels of various thicknesses. However, due to the large amount of glue applied to the particleboard, the appearance quality and physical and mechanical properties are poor, so it is subject to some restrictions in application. limit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] Examples of bagasse hardboard preparation:

[0013] The bagasse is hot ground, and the filterability is 18s. According to the cost of applying the same resin raw material, add phenolic formaldehyde, phenol-modified urea-formaldehyde, urea-formaldehyde and melamine-modified urea-formaldehyde resin in proportion (see Table 1). The amount of waterproofing agent (paraffin) applied is 1.5% of the dry fiber. The sizing fiber contains 5% moisture after drying. The hot pressing process is as follows:

[0014] High-pressure plate surface pressure 80kg / cm, high-pressure hot-pressing time 30s, medium-pressure plate surface pressure 25kg / cm, medium-pressure hot-pressing time 120s

[0015] The surface temperature of the hot-pressed board is 170°C under normal pressure, and 12 pieces of each resin are molded to test the physical and mechanical properties of the fiberboard, and the test results are averaged.

example 2

[0017] Examples of bagasse medium density fiberboard preparation:

[0018] The bagasse is hot ground, and the filterability is 18s. The amount of phenol-modified urea-formaldehyde resin applied is 10% of the dry fiber. The amount of paraffin applied was 2% of the dry fiber. The sizing fiber contains 10% moisture after drying. When thermoforming, the hot plate is equipped with thickness specifications. The heat press plate is 10mm thick. The pressure on the high-pressure plate surface is 45kg / cmz, and the time is 60S. The surface pressure of the medium pressure plate is 25kg / cm2, and the time is 10min. The hot pressing cycle is 5min.

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PUM

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Abstract

The invention discloses a dry manufacturing method for a bagasse fiber board. The method comprises the following steps: thermally grinding bagasse to meet the fiber freeness requirement of between 15 and 24s; adding phenol modified urea resin and paraffin into the bagasse, and mixing the materials to form a board blank, wherein adding amount of the phenol modified urea resin is 3.5 to 5.5 weight percent in the production of a hard fiber board and is 3 to 9 weight percent in the production of a medium-density fiber board, and the adding amount of the paraffin accounts for 1 to 2 percent of the weight of absolute dry fiber; drying the board blank, wherein the water content of the board blank is controlled to be 4 to 8 weight percent in the production of the hard fiber board and 5 to 11 weight percent in the production of the medium-density fiber board; and thermally pressing the board blank to form the bagasse fiber board. The method has the advantages of improving the surface property and physical and mechanical properties of the fiber board, and has no pollution.

Description

technical field [0001] The invention belongs to a method for processing high-quality dry-process hard and medium-density fiberboards by using bagasse. Background technique [0002] At present, wood seals are mainly used to process dry-laid fiberboard at home and abroad. This method utilizes a large amount of forest resources, and the raw material cost of timber is also higher, is 3-4 times of bagasse. [0003] Bagasse is generally used for fiber making, wet-laid fiberboard, particle board production, fuel, wine making, etc. Using bagasse to produce wet-laid fiberboard, the thickness of the product is relatively simple, generally 3.4, 5mm, and bagasse is used in wet-laid fiberboard production or papermaking industry to cause serious sewage pollution. Although sewage treatment can improve sewage pollution, the investment in sewage treatment is relatively large. In recent years, bagasse particle board has been developed at home and abroad. Bagasse particle board, that is, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/02B27N1/00B27N1/02B27N3/08B27N3/10
Inventor 王永
Owner 王永
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