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Urea formaldehyde resin adhesive medium density fiber board utilizing castor bean stalk as raw material

The technology of urea-formaldehyde resin glue and castor stalk is applied in the field of urea-formaldehyde resin glue medium density fiberboard, which can solve the problem of not being able to produce straw-based wood-based panels that meet the requirements of national standards, and achieve the effects of increasing farmers' income, lowering manufacturing costs, and protecting the ecological environment.

Inactive Publication Date: 2010-02-10
苏州伍得人造板设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The medium density fiberboard is made of castor stalk, castor stalk / wood, castor stalk / rice straw or castor stalk / other crop straw mixture, and the surface of the fiber made of the above raw materials is evenly sprayed with 1% NH 4 Cl's urea-formaldehyde resin glue, and 1.0-1.6% paraffin wax is added based on the weight of the dry fiber to improve the water absorption thickness expansion performance of the board; it breaks through that only using urea-formaldehyde resin adhesive, without using special devices, cannot produce products that meet the national standard Technical problems of crop straw wood-based panels required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 A kind of urea-formaldehyde resin medium density fiberboard utilizing castor stalk as raw material

[0018] (1) Processing of raw materials, (1) Crushing of raw materials: Humidify the castor stalks to make the water content about 40%, so as to ensure the quality of the fiber form after thermal grinding, and then use a chipper to chip ; (2) Raw material screening: Screen the crushed castor stalks with a blower to remove the pith in the castor stalk scraps to ensure the performance of the board; (3) Fiber preparation: use a high-temperature and high-pressure cooker to grind the scraps Cooking and softening are carried out, and the softened castor stalk fragments are thermally ground with a disc mill, and the fibers are dehydrated.

[0019] (2) fiber mixing glue and drying, (1) glue mixing: applying solid content to the castor stalk fiber after dehydration is 50% urea-formaldehyde resin adhesive, and the sizing amount is 12% of the absolute dry weight of the ...

Embodiment 2

[0023] Embodiment 2 A kind of urea-formaldehyde resin medium density fiberboard utilizing castor stalk as raw material

[0024] (1) raw material processing, (1) raw material pulverization: castor stalk, timber (castor stalk: wood (mass ratio)=3: 1) are carried out humidification treatment, make its moisture content be about 40%, then Then use a chipper to chip to ensure the morphological quality of the fiber after thermal grinding; (2) raw material screening: use a blower to screen the scrap to remove the castor stalk pith in the raw material to ensure the quality of the board; (3) ) fiber preparation: using a high-temperature and high-pressure cooking pot to cook and soften the broken materials, and use a disc mill to heat-grind the softened castor stalk broken materials to dehydrate the fibers.

[0025] (2) fiber glue mixing and drying, (1) glue mixing: apply urea-formaldehyde resin adhesive with a solid content of 50% to the castor stalk fiber after dehydration, and the siz...

Embodiment 3

[0029] Example 3 A kind of urea-formaldehyde resin medium density fiberboard using castor stalk as raw material

[0030] (1) raw material processing, (1) raw material pulverization: get a certain amount of castor stalk and rice-wheat straw, castor-oil stalk: rice-wheat straw (mass ratio)=70: 30, castor-oil stalk is carried out humidification treatment, makes Its moisture content is about 40%, and then it is chipped with a chipper to ensure the quality of the fiber shape after heat grinding; at the same time, the rice and wheat straw are directly crushed; (2) Raw materials are screened, and the castor stalks are screened by a blower , to remove the pith in the castor stalk; (3) fiber preparation: mix the pulverized castor stalk scraps and rice-wheat straw scraps, then use a high-temperature and high-pressure cooker to cook the scraps to soften them, and use a disc mill to The machine heats the softened mixture and dehydrates the fibers.

[0031] (2) Fiber glue mixing and dryin...

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Abstract

The invention relates to a urea formaldehyde resin adhesive medium density fiber board utilizing a castor bean stalk as a raw material, which is characterized in that the weight proportion of the solid additive amount of castor bean stalk fiber or castor bean stalk with 8 percent of water content and urea formaldehyde resin adhesive is 86-90 to 14-10. The preparation process comprises the following steps: preparing raw materials; mixing the fiber with adhesive and drying; laying and prepressing; hot pressing; and post processing. The invention has the advantages of low manufacture cost, wood resources saving, ecological environment protection and industrialized production. After urea formaldehyde resin is used as the adhesive and 1.0-1.6 percent of paraffin is added on the basis of the mass of the absolutely dry fiber, all technical indexes of the produced medium density fiber board are as follows: density 0.55-0.85kg / cm3, static bending strength 25-37MPa, elastic modulus 2950-3210MPa,plane tensile strength 0.68-1.0MPa and absorbing water thickness expansion rate 7.32 percent-9.25 percent, and reach the standard of a Chinese fiber board.

Description

technical field [0001] The invention relates to a urea-formaldehyde resin medium-density fiberboard using castor stalks as raw materials, and belongs to the technical field of man-made board manufacturing and industrial utilization by using crop residues. Background technique [0002] Wooden material has its unique and incomparable advantages, making it very popular; in addition, woody material is also the only renewable material among the four major materials (wood, steel, cement and plastic) used today, from the perspective of protecting the environment and From an ecological point of view, people can be encouraged to use wood materials, but my country is a country with a relative shortage of forest resources. In order to meet our country's demand for wood materials and protect our country's existing forest resources, we can develop agricultural residues. Castor stalk is a kind of residue of crop straw with good lignification. my country is one of the three major castor pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/04B27N1/00B27N1/02B27N3/08B27N7/00
Inventor 周定国李晓平姜伟民徐咏兰梅长彤周晓燕张洋邵颐王欣黄润州冒海燕高魏
Owner 苏州伍得人造板设备有限公司
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