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Formaldehyde-free artificial board and manufacturing method thereof

A production method and technology for wood-based panels, which are used in flat products, other household appliances, wood processing appliances, etc., can solve the problems of belt scrapping, pre-pressed belt scrapping speed, increasing factory operating costs and downtime, etc.

Active Publication Date: 2021-07-13
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term accumulation of fine wood and / or straw materials cured by isocyanate on the pavement belt and pre-pressed belt will cause the belt to be scrapped
Especially in the production line where the pre-pressed belt uses a mesh belt, the adhered fine wood and / or straw materials are in the fine mesh holes, which is difficult to clean up, and the scrapped pre-pressed belt is faster, which increases the operating cost and downtime of the factory
In the actual production process, it is found that the effect of spraying external release agent or internal release agent is not obvious.

Method used

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  • Formaldehyde-free artificial board and manufacturing method thereof
  • Formaldehyde-free artificial board and manufacturing method thereof
  • Formaldehyde-free artificial board and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Poplar shavings with a moisture content of 8wt% were selected as the board-making material for the press-board test.

[0049] 1) Weigh 27g amino-terminated polyether D-4000 (U.S. Huntsman company, component II, functionality 2, total amine value 0.48mmol / g, structural formula such as formula (I), wherein R 1 =CH 3 , R 2 = H, R 5 =CH 3 CHCH 2 , R 3 and R 4 Both are general formula (II), wherein x=0, y=31) in a 200ml clean beaker, then take by weighing 2.7g high-purity oleic acid UFA-1890 (Woda Xipu Chemical (Sichuan) Co., Ltd., component I ) into a beaker, and stirred for 2 minutes at a speed of 500 rpm with a stirring paddle to make it uniform, and obtain material A;

[0050] Add 60g polymethylene polyphenylisocyanate PM-200 (Wanhua Chemical Group Co., Ltd., material B) in the beaker again, utilize stirring paddle to stir 2 minutes under the rotating speed of 500 rpm, make it even, obtain Mixture C.

[0051] 2) Weigh 2000g of poplar wood shavings on the surface...

Embodiment 2

[0058] A mixture of poplar wood shavings and wheat straw shavings with a moisture content of 4wt% was selected as the board-making material for the press test. The weight ratio of poplar wood shavings and wheat straw shavings was 3:1, and it was set aside.

[0059] 1) Weigh 0.6g amino-terminated polyether D-400 (U.S. Huntsman company, component II, functionality 2, total amine value 4.4mmol / g, structural formula such as formula (I), wherein R 1 =CH 3 , R 2 = H, R 5 =CH 3 CHCH 2 , R 3 and R 4 Both are general formula (II), wherein x=0, y=3) in a 100ml clean beaker, then weigh 0.6g zinc stearate (Jiangxi Hongyuan Chemical Co., Ltd., component I) into the beaker, use stirring The paddle was stirred at a rotating speed of 500 rpm for 2 minutes to make it uniform, and to obtain material A;

[0060] Add 60g polymethylene polyphenylisocyanate PM-400 (Wanhua Chemical Group Co., Ltd., material B) in the beaker again, utilize stirring paddle to stir 2 minutes under the rotating s...

Embodiment 3

[0067] Poplar shavings with a moisture content of 10wt% were selected as the board-making material for the press-board test.

[0068] 1) Weigh 6g of amino-terminated polyether ED-600 (Herma Group, component II, functionality 2, total amine value 3.19mmol / g, structural formula as formula (I), where R 1 =CH 3 , R 2 = H, R 5 =CH 3 CHCH 2 , R 3 and R 4 Both are general formula (II), wherein x=1.8, y=4.5) in a 100ml clean beaker, then weigh 3g of magnesium oleate (Shanghai Lisen Chemical Co., Ltd., component I) into the beaker, and use the stirring paddle to Stir for 2 minutes at a speed of 500 rpm to make it uniform and obtain material A;

[0069] Add 60g polymethylene polyphenylisocyanate PM-700 (Wanhua Chemical Group Co., Ltd., material B) in the beaker again, utilize stirring paddle to stir 2 minutes under the rotating speed of 500 rpm, make it even, obtain Mixture C.

[0070] 2) Weigh 2000g of poplar wood shavings on the surface and add them to the mixer. Connect a s...

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PUM

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Abstract

The invention provides a formaldehyde-free artificial board and a manufacturing method thereof. According to the method, accumulation of fine board manufacturing materials on a paving belt and a pre-pressing belt in the board manufacturing process can be greatly reduced, and the probability of shutdown and belt scrapping when a factory adopts an isocyanate adhesive for production is reduced. The manufacturing method comprises the following steps of (1) stirring and mixing a material A and a material B to obtain a mixture C; (2) uniformly mixing the mixture C with a board manufacturing material, and manufacturing the uniformly mixed material into a board blank, wherein the board manufacturing material comprises one or more of a wood material and a straw material; then paving the uniformly mixed material into a board blank with a preset shape, wherein the uniform mixing means that the mixture C uniformly covers the board manufacturing material; and (3) compressing the board blank and then carrying out hot press molding to obtain the formaldehyde-free artificial board, wherein timing is started when stirring in the step (1) is stopped, and the obtained mixture C is put into the step (2) within 10 minutes.

Description

technical field [0001] The invention relates to a method for manufacturing a aldehyde-free wood-based panel; further, the invention relates to a method for manufacturing a aldehyde-free wood-based panel using an isocyanate adhesive. Background technique [0002] At present, the commonly used synthetic adhesives for wood-based panels are formaldehyde-based adhesives, including "trialdehyde glue" represented by urea-formaldehyde resin (UF), phenolic resin (PF), melamine-formaldehyde resin and other adhesives. These three types of adhesives all use formaldehyde as a synthetic raw material. Formaldehyde escapes from adhesive products during production and use. It is regarded as one of the main sources of indoor air pollution. The pollution cycle is long and difficult to remove. It has always plagued man-made development of the board industry. [0003] Due to environmental considerations, aldehyde-free isocyanate adhesives have been used more and more in recent years. In additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/08B27N3/10B27N3/02B27N3/04C08G18/76C08G18/50C08G18/67C08G18/28
CPCB27N3/08B27N3/10B27N3/02B27N3/04C08G18/7664C08G18/5021C08G18/6755C08G18/281
Inventor 涂松李厚义孙卫华范丽颖王向硕张梓军孙鹏
Owner WANHUA CHEM GRP CO LTD