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 of the existing glue-free particleboard, a preparation method of high-strength glue-free particleboard is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 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 the deionized water, and stir at 140 r / min for 10 minutes at normal temperature to obtain a sodium hydroxide solution , add bamboo fiber to sodium hydroxide solution, stir at 200r / min in a water bath at 70°C for 1h to obtain a bamboo fiber suspension, place the bamboo fiber suspension in an ultrasonic disperser, and dissolve it at 50°C 400W ultrasonic treatment for 30min, filter, take the filter cake, wash with deionized water until neutral, place in an oven at 60°C and dry for 3h to obtain alkali-treated bamboo fiber, place the alkali-treated bamboo fiber in a shearing machine, and cut 4min to get short bamboo fibers with an average length of 4mm; then weigh 30 parts of maltodextrin, 15 parts of sucrose, 15 parts of glucose, 18 parts of citric acid, 18 parts of lactic acid, and 12 parts of carboxymethyl fiber in parts by weight ele...

Embodiment 2

[0036] In parts by weight, weigh 25 parts of bamboo fiber, 25 parts of sodium hydroxide, and 125 parts of deionized water, add sodium hydroxide to the deionized water, and stir for 12 minutes at a speed of 160 r / min at normal temperature to obtain a sodium hydroxide solution , add bamboo fiber to sodium hydroxide solution, stir at 225r / min in a water bath at 75°C for 1h to obtain a bamboo fiber suspension, place the bamboo fiber suspension in an ultrasonic disperser, and dissolve it at 55°C Ultrasonic treatment at 450W for 35 minutes, filtering, taking the filter cake, washing with deionized water until neutral, drying in an oven at 70°C for 3 hours to obtain alkali-treated bamboo fiber, placing the alkali-treated bamboo fiber in a shearing machine, and cutting 5min to obtain short bamboo fibers with an average length of 5mm; then weigh 35 parts of maltodextrin, 18 parts of sucrose, 18 parts of glucose, 21 parts of citric acid, 21 parts of lactic acid, and 14 parts of carboxyme...

Embodiment 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 the deionized water, and stir for 15 minutes at a speed of 180 r / min at normal temperature to obtain a sodium hydroxide solution , add bamboo fiber to sodium hydroxide solution, stir at 250r / min in a water bath at 80°C for 2h to obtain a bamboo fiber suspension, place the bamboo fiber suspension in an ultrasonic disperser, and dissolve the bamboo fiber suspension at 60°C Ultrasonic treatment at 500W for 40 minutes, filtering, taking the filter cake, washing with deionized water until neutral, drying in an oven at 80°C for 4 hours to obtain alkali-treated bamboo fiber, placing the alkali-treated bamboo fiber in a shearing machine, and cutting 6min to get short bamboo fibers with an average length of 6mm; then weigh 40 parts of maltodextrin, 20 parts of sucrose, 20 parts of glucose, 24 parts of citric acid, 24 parts of lactic acid, and...

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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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