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Environment-friendly type shaving board and producing method thereof

A production method and particleboard technology, which can be applied to other household appliances, pretreatment of molding materials, household components, etc., can solve the problems of particleboard water resistance, poor heat resistance, high product cost and high raw material requirements, and achieve low cost , simple production method and excellent performance

Inactive Publication Date: 2008-09-03
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the recycled board made of these aldehyde resin binders has formaldehyde escape during production and use, which pollutes the air, and has high requirements for raw materials, requiring pre-drying of woody and other biomass raw materials, and the water content is strictly controlled at 2 Within %-3%
In addition, the particleboard made of adhesives such as UF has poor water resistance and heat resistance.
The polyurethane (PU) adhesives currently used can be applied to a wide range of raw materials and have high adhesion to the substrate, but the adhesives currently used in PU particleboards are mainly isocyanates (TDI, MDI or PAPI) Adhesive, too much of it will lead to high product cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A, the drying of bamboo powder, screening, make bamboo powder particle diameter in the scope of 20~60 purpose, get 900 parts by weight, feed bin;

[0019] B. Bamboo powder is liquefied and degraded in a polyethylene glycol solvent at 130°C with sulfuric acid as a catalyst for 60 minutes. After cooling, magnesium oxide is added to neutralize the pH value to neutral. After stirring evenly, bamboo powder polyether ester poly alcohol.

[0020] C, 60 parts by weight of bamboo powder polyether ester polyols and 25 parts by weight of polymethylene polyphenyl polyisocyanates (PAPI) are mixed into glue, directly sprayed onto the surface of bamboo powder and made to penetrate into the inside of bamboo powder;

[0021] D. Paving and hot pressing, the bamboo powder mixed with the adhesive is molded at a high temperature of 120°C for 20 minutes, reacted and solidified, molded and demoulded, and made into a particle board after sawing and sanding.

[0022] After measurement, the par...

Embodiment 2

[0024] A, the drying of bamboo powder, screening, make bamboo powder particle diameter in the scope of 40~80 purpose, get 1100 parts by weight, feed bin;

[0025] B. The bagasse is liquefied and degraded in an ethylene glycol solvent at 150°C with sulfuric acid as a catalyst for 90 minutes. After cooling, magnesium oxide is added to neutralize the pH value to neutral. After stirring evenly, bagasse polyether ester polyol is obtained .

[0026] C, 70 parts by weight bagasse polyether ester polyols and 30 parts by weight toluene diisocyanate (TDI) are mixed into glue, directly sprayed onto the bamboo powder surface and make it penetrate into the bamboo powder inside;

[0027] D. Paving and hot pressing, the bamboo powder mixed with the adhesive is molded at a high temperature of 130°C for 15 minutes, reacted and solidified, shaped and demoulded, and made into a particle board after sawing and sanding.

[0028] After measurement, the static bending strength of the particleboard ...

Embodiment 3

[0030] A, drying and screening of bagasse, so that bagasse particle size is in the scope of 40~80 meshes, get 1000 parts by weight, feed bin;

[0031] B. The bagasse is liquefied and degraded in a polyethylene glycol solvent at 150°C with sulfuric acid as a catalyst for 60 minutes. After cooling, magnesium oxide is added to neutralize the pH value to neutral. After stirring evenly, bagasse polyether ester poly alcohol.

[0032] C, 60 parts by weight of bagasse polyether ester polyol and 30 parts by weight of polymethylene polyphenyl polyisocyanate (PAPI) are mixed into glue, directly sprayed onto the surface of bagasse and made to penetrate into it;

[0033] D. Pavement and hot pressing, mold the bagasse mixed with the adhesive at a high temperature of 140°C for 10 minutes, react to solidify, form and demould, and make a particle board after sawing and sanding.

[0034] After measurement, the static bending strength of the particleboard of the present invention is 35.7MPa, an...

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Abstract

The invention discloses an environment-friendly shaving board and a manufacture method thereof. The environment-friendly shaving board comprises plant fiber materials 850 to 1,100 weight parts, plant fiber poly(ether-ester) polyol 60 to 80 weight parts and isocyanate 25 to 45 weight parts. The manufacture method comprises the following steps: mixing plant fiber poly(ether-ester) polyol with isocyanate to obtain an adhesive; directly spraying the adhesive on the surface of the plant fiber material, and permeating into the plant fiber material, spreading, hot-pressing, mold-pressing the plant fiber material mixed with the adhesive at high temperature, reacting, curing, molding, de-molding, sawing, and sanding to obtain the shaving board. The shaving board is free of toxic and harmful substances such as free formaldehyde, and is an environment-friendly green building material. The shaving board has low cost, simple manufacture method and excellent performance.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an environment-friendly particleboard and a production method thereof. Background technique [0002] Particleboard is an important board type in wood-based panels. Its raw materials can be broken wood, shavings, sawdust in wood processing, and scraps of agricultural and sideline products such as bamboo, straw, and wheat straw. The adhesives used in wood regeneration products such as early particle boards belong to the "three aldehyde" adhesives, namely urea-formaldehyde resin (UF), phenolic resin (PF), and melamine-formaldehyde resin (MF) adhesives. However, the recycled boards made of these aldehyde resin binders have formaldehyde escaping during production and use, which pollutes the air, and has high requirements for raw materials, requiring pre-drying of woody and other biomass raw materials, and the water content is strictly controlled at 2 %-3% ​​or less. In addition, th...

Claims

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Application Information

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IPC IPC(8): B27N3/04B27N1/00B27N1/02B27N3/08
Inventor 廖兵杨小旭庞浩颜永斌董翔
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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