Preparation method of high-strength glue-free shaving board

A particleboard and high-strength technology, which is applied in the direction of flat products, manufacturing tools, and pretreatment of molding materials, can solve the problems of poor mechanical properties of non-adhesive particleboard, and achieve the goal of enhancing mechanical strength, improving cohesive force, and improving cohesive strength. Effect

Inactive Publication Date: 2020-10-27
深圳市智百灵建筑材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Technical problem to be solved by the present invention: Aiming at the problem of poor mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] In parts by weight, weigh 20 parts of bamboo fiber, 20 parts of sodium hydroxide, and 100 parts of deionized water, add sodium hydroxide to deionized water, and stir at 140r / min for 10 minutes at room temperature to obtain sodium hydroxide solution , The bamboo fiber was added to the sodium hydroxide solution and stirred at 200r / min for 1 hour in a water bath at 70°C to obtain a bamboo fiber suspension. The bamboo fiber suspension was placed in an ultrasonic disperser, and at 50°C 400W ultrasonic treatment for 30min, filter, take the filter cake, wash it with deionized water to neutrality, and dry it in an oven at 60℃ for 3 hours to obtain alkali-treated bamboo fiber. Put the alkali-treated bamboo fiber in a shearing machine and cut 4min, get short bamboo fiber with an average length of 4mm; then weigh 30 parts maltodextrin, 15 parts sucrose, 15 parts glucose, 18 parts citric acid, 18 parts lactic acid, 12 parts carboxymethyl fiber in parts by weight. 9...

Example Embodiment

[0035] Example 2

[0036] In parts by weight, weigh 25 parts of bamboo fiber, 25 parts of sodium hydroxide, 125 parts of deionized water, add sodium hydroxide to deionized water, and stir at 160r / min for 12 minutes at room temperature to obtain sodium hydroxide solution , The bamboo fiber was added to the sodium hydroxide solution and stirred at 225r / min for 1 hour in a water bath at 75°C to obtain a bamboo fiber suspension. The bamboo fiber suspension was placed in an ultrasonic disperser at 55°C. 450W ultrasonic treatment for 35min, filter, take the filter cake, wash with deionized water to neutrality, dry in an oven at 70℃ for 3h, get alkali-treated bamboo fiber, put the alkali-treated bamboo fiber in a shearing machine, and cut 5min, get short bamboo fiber with an average length of 5mm; then weigh 35 parts maltodextrin, 18 parts sucrose, 18 parts glucose, 21 parts citric acid, 21 parts lactic acid, 14 parts carboxymethyl fiber in parts by weight Sucrose, 105 parts of deioniz...

Example Embodiment

[0037] Example 3

[0038] In parts by weight, weigh 30 parts of bamboo fiber, 30 parts of sodium hydroxide, and 150 parts of deionized water, add sodium hydroxide to deionized water, and stir at 180r / min for 15 minutes at room temperature to obtain sodium hydroxide solution , The bamboo fiber was added to the sodium hydroxide solution and stirred at 250r / min for 2h in a water bath at 80°C to obtain a bamboo fiber suspension. The bamboo fiber suspension was placed in an ultrasonic disperser and heated at 60°C. 500W ultrasonic treatment for 40min, filter, take the filter cake, wash with deionized water to neutrality, dry in an oven at 80℃ for 4h to obtain alkali-treated bamboo fiber, put the alkali-treated bamboo fiber in a shearing machine, and cut 6min, get short bamboo fiber with an average length of 6mm; then weigh 40 parts maltodextrin, 20 parts sucrose, 20 parts glucose, 24 parts citric acid, 24 parts lactic acid, 16 parts carboxymethyl fiber in parts by weight. Vegetarian, ...

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Abstract

The invention relates to a preparation method of a high-strength glue-free shaving board, and belongs to the technical field of artificial boards. According to the preparation method of the high-strength glue-free shaving board, the high-strength glue-free shaving board is prepared by taking a poplar wood shaving sheet as a raw material and adding bamboo fibers, cellulose molecules of the poplar wood shaving sheet contain a plurality of active hydroxyl groups, the binding force in the shaving sheet is increased under the action of pressure, cellulose and hemicellulose are promoted to be degraded at high temperature in the hot pressing process to generate a series of monosaccharides, monosaccharides and monosaccharides in the raw material are dehydrated to form furfural substances, furfuralis resinified in the hot pressing process, the bonding strength between the poplar shaving sheet and the bamboo fibers can be effectively improved, and therefore, the mechanical strength of the glue-free shaving board is enhanced; and through hot-pressing treatment, bamboo fiber intercellular layers are separated from cell walls, lignin in the bamboo fiber intercellular layers is extracted again,meanwhile, degradation products of the hemicellulose are deposited on the surfaces of the fibers to achieve the adhesive effect, and the adhesive force between the poplar shaving piece and the bamboofibers is improved.

Description

technical field [0001] The invention relates to a preparation method of a high-strength glue-free particleboard, which belongs to the technical field of wood-based panels. Background technique [0002] At present, the vast majority of wood-based panel products at home and abroad are made of synthetic resin glue such as urea-formaldehyde resin or phenolic resin. Such synthetic resin adhesives will release free formaldehyde during the production, processing and use of wood-based panels, which will damage human health and pollute the environment. And the common methods to reduce formaldehyde emission (reducing the molarization of adhesives, adding formaldehyde scavenger, veneer sealing treatment, etc.) can only temporarily reduce the free formaldehyde emission of materials, but cannot control the amount of free formaldehyde released by materials during use. The slow and repeated release of free formaldehyde, so how to fundamentally control the formaldehyde pollution of materia...

Claims

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Application Information

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IPC IPC(8): B27N1/02B27N3/02B27L11/08
CPCB27L11/08B27N1/0209B27N3/02
Inventor 雷国庆
Owner 深圳市智百灵建筑材料科技有限公司
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