Composite-rubber formaldehyde-free mildew-proof medium-density fiberboard and manufacturing process thereof

A manufacturing process and medium-density technology, applied in fiberboard, papermaking, textiles and papermaking, etc., can solve problems such as air pollution and mildew, and achieve the effects of improving production efficiency, promoting colloidal foaming, and increasing colloidal specific surface area

Inactive Publication Date: 2018-06-05
NANNING KETIAN SHUIXING TECH LTD CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on the current state of the prior art above, the object of the present invention is to provide a formaldehyde-free and mildew-resistant composite glue medium density fiberboard and its manufacturing process that can solve the problems of air pollution caused by indoor formaldehyde release of fiberboards and the problems of moisture and mildew

Method used

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  • Composite-rubber formaldehyde-free mildew-proof medium-density fiberboard and manufacturing process thereof

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Embodiment 1

[0024] A kind of manufacturing technology of formaldehyde-free mildew-proof medium-density fiberboard with 9mm composite glue, the steps are as follows:

[0025] 1. Chipping: the wood is made into qualified wood chips with a length of 15-60 mm, a width of 15-30 mm, and a thickness of 3-6 mm through a chipping machine;

[0026] 2. Cooking and hot grinding: the wood chips are softened by cooking for 3 minutes, the temperature is about 170 ° C, and the pressure is 0.86 MPa; the softened wood chips are defibrated by a hot mill, and molten paraffin is added to the mill at the same time. The hot grinding temperature is 175 ° C. The pressure is 0.83MPa, and the amount of paraffin applied is 0.2% of the dry weight of the fiber;

[0027] 3. Sizing and drying: Mix aromatic water-based polyurethane with modified vegetable protein glue and cross-linking agent evenly through a static mixer, and then transport them to the spray pipe to mix with fibers evenly, among which aromatic water-base...

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Abstract

The invention discloses a composite-rubber formaldehyde-free mildew-proof medium-density fiberboard and a manufacturing process thereof. The manufacturing process of the fiberboard is characterized inthat a mixed solution of waterborne polyurethane, modified vegetable protein glue, mildew preventive and a cross-linking agent is evenly sprayed into wood fibers to form sizing fibers, the sizing fibers are laid into a board blank, pre-pressing moulding is conducted at the pressure of 60-100 N / cm<2>, heat solidification is conducted under the hot-pressing conditions that the temperature is 175-230 DEG C and the pressure is 100-350 N / cm<2>, and the composite-rubber formaldehyde-free mildew-proof medium-density fiberboard is prepared; by weight, 2-5 parts of waterborne polyurethane, 2-4 parts of modified vegetable protein glue, 0.1-0.5 part of mildew preventive and 0.2-0.6 part of cross-linking agent are added into every 100 parts of wood fibers. The wood fiberboard prepared by means of themethod does not release formaldehyde and can suppress dampness and mildew.

Description

technical field [0001] The invention relates to the field of wood processing, in particular to a formaldehyde-free and mildew-proof medium-density fiberboard with composite glue and a manufacturing process thereof. Background technique [0002] Fiberboard is one of the important varieties of wood-based panels. According to statistics, the total output of fiberboard in my country in 2015 was 55,544,632m 3 . Medium-density fiberboard is widely used as interior decoration and decoration materials, and it is mainly produced by using three-aldehyde adhesives containing formaldehyde. The release of formaldehyde and phenol toxic substances from trialdehyde glue board can last up to 15 years. Formaldehyde is a highly irritating toxic chemical, which has been listed as a Class I carcinogen by the World Health Organization. In addition, fiberboard is easily corroded by microorganisms in a humid environment, mildew occurs, mildew spots occur, affect the neat appearance of the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J1/04D21J1/06D21J1/10D21J1/02
Inventor 戴家兵马丁息曾玲钱昱亨
Owner NANNING KETIAN SHUIXING TECH LTD CO
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