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Compostte artificial board and its preparation method

A wood-based panel and non-wood technology, applied in the field of straw non-wood plant fiber composite wood-based panels and their preparation, can solve the problems of less industrialization promotion, low fiber yield, "more laboratory research, etc., so as to reduce the release of formaldehyde. The amount, the preparation process is simple, and the effect of improving the comprehensive performance

Inactive Publication Date: 2005-06-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Since the structural characteristics and chemical components of straw cells are different from those of wood, traditional methods are used for material crushing or fiber separation, resulting in low fiber yield and poor shape, which affects the physical and mechanical properties of the product
[0007] 2. Since the surface of the straw contains many substances that are not conducive to gluing, it is difficult to obtain satisfactory gluing strength (especially the internal bonding strength) by using traditional urea-formaldehyde resin or phenolic resin glue.
The price of isocyanate is 8-10 times that of urea-formaldehyde resin. Although the sizing amount of the former is much lower than that of the latter, the absolute cost is still higher than the latter;
[0010] (2) sticky board problem
[0011] Because of the above-mentioned difficulties, the current domestic straw wood-based panels have "more laboratory research, less industrialization promotion; more feasibility reports, less actual investment in building factories; more public opinion support for products.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] A straw-like non-wood plant fiber composite wood-based panel, comprising urea-formaldehyde resin binder, straw-like non-wood plant fiber and bentonite, the straw-like non-wood plant fiber is 12-75 mesh straw-like non-wood plant fiber scraps, urea-formaldehyde resin The weight percentage ratio of binding agent, straw non-wood plant fiber and bentonite is: 12~60%: 35~85%: 3~50%, as desirable 20%: 70%: 10%; 30%: 40% : 30%; 40%: 20%: 40%, the present invention can also comprise attapulgite, the weight percentage distribution ratio of urea-formaldehyde resin binder and attapulgite is: 12~60%: 3~50%, as desirable 1:0.5; 1:5; 1:15. In this embodiment, while adding the binder, a curing agent can be added, such as ammonium chloride curing agent accounting for 1-1.5% of the urea-formaldehyde resin amount; Melamine; adding waterproofing agent to improve the water resistance of the board, such as adding emulsified paraffin wax accounting for 1% of the total, the above-mentioned st...

Embodiment 2

[0024] A straw-like non-wood plant fiber composite wood-based panel, which is composed of urea-formaldehyde resin binder, straw-like non-wood plant fiber, attapulgite and bentonite, 12-60%: 35-85%: 3-50%: 3- 50%, such as 20%: 60%: 10%: 10%; 30%: 40%: 20%: 10%; 40%: 20%: 20%: 20%.

Embodiment 3

[0026] A straw-like non-wood plant fiber composite wood-based panel is composed of urea-formaldehyde resin binder, straw-like non-wood plant fiber and bentonite, and the weight percentage ratio of urea-formaldehyde resin binder, straw-like non-wood plant fiber and bentonite is as follows: 12-60%: 35-85%: 3-50%, for example, 20%: 70%: 10%; 30%: 40%: 30%; 40%: 20%: 40%. In this embodiment, while adding the binder, a curing agent can be added, such as ammonium chloride curing agent accounting for 1-1.5% of the urea-formaldehyde resin amount; Melamine; adding a waterproofing agent to improve the water resistance of the board, such as adding emulsified paraffin wax accounting for 1% of the total amount.

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PUM

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Abstract

A composite artificial board is prepared from the strew and stalk fibres other than wood fibres, urea-formaldehyde resin and benton through breaking said straw and stalk fibres, making its water content to be 3-25%, proportionally mixing it with benton, ball grinding, proportionally adding urea-formaldehyde resin, stirring, spreading in die, and hot pressing.

Description

technical field [0001] The invention relates to a wood-based panel and a preparation method thereof, in particular to a straw non-wood plant fiber composite wood-based panel and a preparation method thereof. Background technique [0002] Due to its good physical and mechanical properties and easy machining, surface processing and finishing properties, wood-based panels are widely used in furniture, interior decoration and other fields, and have been gradually expanded. With the shortage of forest resources worldwide, the supply of wood is becoming increasingly tight, and the production of wood-based panels has been affected to a certain extent. [0003] my country is a country with poor forest resources. The national forest coverage rate is only 16.55%, which is much lower than the world average of 25%, ranking 120th in the world. The per capita forest stock volume is 8.6m 3 , far lower than the per capita 71.8m 3 world average level. The long-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/02
Inventor 董寅生王红星张凯军林萍华蔡玉珍
Owner SOUTHEAST UNIV
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