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Method for manufacturing soybean protein modified adhesive formaldehyde-free medium-density fiberboard

A technology of soybean protein and production method, applied in the preparation of animal glue or gelatin, protein adhesive, adhesive and other directions, can solve problems such as formaldehyde pollution, and achieve the effects of high bonding strength, solving formaldehyde pollution and low viscosity

Active Publication Date: 2014-09-24
DONGYING ARTIFICIAL BOARD FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This new type of glue is expected to solve the problem of formaldehyde pollution in the wood-based panel industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The manufacturing method of the soybean protein modified glue formaldehyde-free medium density fiberboard of the present invention is that the raw material soybean meal, denaturant, crosslinking agent, defoamer, preservative and water are heated, stirred and mixed for reaction, and then passed through a colloid mill Make soybean protein formaldehyde-free adhesive with homogenizer, add waterproofing agent, curing agent and buffering agent to the soybean protein formaldehyde-free adhesive, stir and mix at room temperature, mix with wood fiber evenly, dry, pave, hot press and Formaldehyde-free medium density fiberboard made of soybean protein modified glue.

[0042]Specifically, the method uses soybean meal as a raw material, NaOH as a denaturant, tannic acid as a crosslinking agent, polyoxypropylene glyceryl ether as an antifoaming agent, and BIT 1,2-benzisothiazolin-3-one As a preservative, and water, heat, stir and mix according to the formula, and then pass through a c...

Embodiment 2

[0073] A. the making of soybean protein formaldehyde-free adhesive is the same as embodiment one;

[0074] B. adjusting glue is the same as embodiment one;

[0075] c. dry with embodiment one;

[0076] d. Hot pressing

[0077] Undertake the wood fibers obtained in step c to be paved, pre-pressed, and hot-pressed to make fiberboards, and make 22mm fiberboards with a density of 720g / m 3 , Hot-pressing process parameters: hot-pressing 170 ℃ ~ 180 ℃, hot-pressing pressure 7MPa, hot-pressing time 7.5min.

[0078] The density produced by this method is 750g / m 3 , 18mm medium density fiberboard was tested: internal bonding strength IB=0.82MPa, tensile strength TS=12.26 MPa, static bending strength MOR=26.55 MPa, elastic modulus MOE=2748.39 MPa, formaldehyde emission: not measured (using perforation Extraction method), the water swelling rate of the plate is 6.0% in 24h.

[0079] The performance indicators of each item of the medium density fiberboard produced by the method all m...

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Abstract

The invention provides a method for manufacturing a soybean protein modified adhesive formaldehyde-free medium-density fiberboard, and belongs to the technical field of density fiberboard manufacture. The method comprises the following steps: heating, stirring and mixing raw materials (soybean pulp, a denaturing agent, a crosslinking agent, a defoaming agent, a preservative and water) to react; preparing the soybean protein formaldehyde-free adhesive by virtue of a colloid mill and a homogenizer; adding a water-proofing agent, a curing agent and a buffering agent into the soybean protein formaldehyde-free adhesive, stirring and mixing at room temperature, and uniformly mixing with wood fibers; performing drying, paving and hot-pressing to prepare the soybean protein modified adhesive formaldehyde-free medium-density fiberboard. The method is environment-friendly and non-pollution; the soybean protein modified adhesive formaldehyde-free medium-density fiberboard is high in adhesion strength, good in water proofing, low in price, low in viscosity and easy to treat and process, can be subjected to hot-pressing and cold-pressing in application, and is not easy to crack. The soybean protein modified adhesive formaldehyde-free medium-density fiberboard can be adhered to fibers and the like, and the processing process can be controlled, and an environment-friendly fiberboard can be manufactured.

Description

technical field [0001] The invention relates to the technical field of producing chemical product density fiberboards, in particular to a method for producing soybean protein modified glue formaldehyde-free medium density fiberboards. Background technique [0002] At present, the adhesives widely used in the production of MDF mainly include phenolic resin adhesive (PF), urea-formaldehyde resin adhesive (UF), melamine-modified urea-formaldehyde resin adhesive (MuF) and isocyanate resin adhesive (MDI), etc. Most of the raw materials are from from non-renewable fossil resources. During the production and use of these adhesives, formaldehyde, which is harmful to the environment and human body, will be released for a long time. With the rising price of crude oil and people's continuous concern about their own and environmental safety, this problem has become more serious. [0003] In recent years, the research on environmentally friendly adhesives and composite materials based ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J11/06C09J11/08C09J11/04B27N1/02B27N3/04
Inventor 桑明光毛广杰高长征王光涛吴西华张利民
Owner DONGYING ARTIFICIAL BOARD FACTORY
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