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Fiberboard adhesive-reduction manufacturing method

A technology of fiberboard and gelatinization, which is applied in the direction of pretreatment of flat products, manufacturing tools, and molding materials, etc. It can solve the problems that have not yet been achieved and the strength of fiberboard is low, so as to reduce the amount of sizing, reduce the amount of sizing, and reduce production costs. and environmental pollution

Inactive Publication Date: 2018-01-19
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also people who use white rot fungus and laccase to pretreat lignocellulosic raw materials to prepare glue-free fiberboards, which have achieved good results, but the strength of the prepared fiberboards is low and has not yet reached the relevant standards ("A kind of using lignocellulose raw materials Method for producing fiberboard" (CN201210117521.6))

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: versicolor versicolor pretreatment corn stalk

[0020] Put the variegated versicolor versicolor slant strains stored in the refrigerator on the potato medium slant for activation, cultivate until the mycelia cover the slant, take 3 pieces of mycelium slant and insert them into 100mL potato liquid medium for cultivation, at 28°C Cultivate at 150r / min for 5 days, and then gradually scale up to 5 tons of fermenters according to the inoculation volume percentage of 10%. The fermentation conditions are 150r / min, the ventilation rate is 1:0.5, and the temperature is 25°C. Cultivate for 4 days to obtain Versicolor versicolor Liquid strains: inoculate the variegated versicolor versicolor liquid strains into sterilized corn stalks at a mass fraction of 10% of the corn stalks, mix them evenly under sterile conditions, and place them statically in a constant temperature and humidity environment at a temperature of 28°C. The relative humidity is 92%, and it is ready t...

Embodiment 2

[0021] Embodiment 2: Pretreatment of sorghum stalks with milk white rake bacteria

[0022] Put the slant strain of Lactobacillus spp. preserved in the refrigerator on the potato medium slant for activation. After culturing until the mycelia cover the slant, take 3 pieces of mycelium slant and insert them into 100mL potato liquid medium for cultivation at 28°C for 150r Cultivate for 4 days per min, and then scale up to 5 tons of fermenters step by step according to the inoculation volume percentage of 10%. The fermentation conditions are 150r / min, the ventilation rate is 1:0.5, and the temperature is 25°C. Inoculate the sterilized sorghum stalks with 10% mass fraction of the liquid strain of Lactobacillus spp., mix them evenly under sterile conditions, and place them statically in a constant temperature and humidity environment at a temperature of 30°C and a relative humidity of 90%. 28d later for use.

Embodiment 3

[0023] Embodiment 3: laccase pretreatment wood shavings

[0024] Take laccase solid enzyme powder, dissolve it with pH4.5 sodium acetate buffer solution until the enzyme activity is 10000U / mL, take shavings, add laccase solution according to the enzyme activity ratio of 15U / g, at a solid-liquid ratio of 1:30, temperature Enzymolysis was carried out at 45°C and pH 4.5 for 2 hours, and the filter residue was obtained by filtration.

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PUM

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Abstract

The invention provides a fiberboard adhesive-reduction manufacturing method. The fiberboard adhesive-reduction manufacturing method comprises the following steps of: (1) performing biological pretreatment on a wood fiber raw material, and changing the physical and chemical structures of the wood fibers to generate adhesive substances; (2) uniformly drying the biological pretreated raw material obtained in the step (1) through a rotary barrel type drying method until moisture content is about 10%; (3) uniformly spraying a chemical adhesive into the dried material through a spraying mode; and (4) performing hot-pressing to prepare the fiberboard. According to the fiberboard adhesive-reduction manufacturing method provided by the invention, lignocellulose in the raw material is modified by biologically pre-treating the raw material, and certain adhesive substances are generated; and furthermore, hot-pressing is performed by applying a little chemical adhesive, so that manufacturing of thehigh-strength fiberboard is realized, and therefore, pollution and the production cost of the fiberboard are reduced.

Description

technical field [0001] The invention relates to a method for preparing fiberboards, in particular to a method for preparing fiberboards for reducing the amount of chemical adhesives through biological pretreatment. Background technique [0002] According to statistics, my country has become the world's largest producer and consumer of man-made fiberboard, with an output value exceeding 100 billion yuan. In the fiberboard manufacturing process, some aldehyde adhesives are usually added, such as urea-formaldehyde resin glue, phenolic resin glue, melamine formaldehyde resin glue, etc. The use of these aldehyde adhesives will lead to: 1) Release during the production and use of fiberboard Formaldehyde is facing environmental and health pressures; 2) Using non-renewable resources—petroleum to synthesize adhesives, competes with energy sources for oil. Therefore, how to reduce the amount of sizing in the process of fiberboard preparation has become the focus of research. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/00B27N3/08B27N3/00B27N3/04
Inventor 邬建国梁小华王新风纪丽莲张曈陈春燕夏林吴蕾蕾陆家锦
Owner HUAIYIN TEACHERS COLLEGE
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