Manufacturing method of remaking light-colored bamboo for outdoors

A technology for recombining bamboo materials and manufacturing methods, applied in the direction of manufacturing tools, pretreatment and application of molding materials, etc., can solve the problems of poor bonding ability between bamboo fiber bundles and adhesives, damage to the internal structure of bamboo fibers, and damage to the strength of bamboo fibers. Achieve the effect of reducing pigmentation, reducing the degree of damage, and quickly softening

Active Publication Date: 2020-02-04
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of existing bamboo recombined boards are that some composite boards formed by mutual bonding and injection molding of bamboo powder and viscose lose the original woody form of bamboo, and some other composite boards are obtained by extracting bamboo fiber bundles from bamboo chips. The recombined board formed by laying boards, sizing, and bonding will destroy the internal structure of the fiber bundles of bamboo fibers during the process of extracting bamboo fibers from bamboo chips, resulting in an overall decrease in strength. In addition, during the process of extracting fibers from bamboo chips Summary needs to be softened, and its existing technology will greatly deepen the color of bamboo fiber during the softening process, and further rinsing is required to prepare light-colored bamboo fiber bundles. On the one hand, the color produced during the softening process will be removed by rinsing, which will further damage The intensity of bamboo fiber, and increased working procedure, further pollutes the environment, and existing bamboo recombined board exists and the bonding ability of bamboo fiber bundle and glue is poor, needs a large amount of glue to coat bamboo fiber bundle to glue

Method used

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  • Manufacturing method of remaking light-colored bamboo for outdoors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of manufacture method of reconstituted bamboo for light-color outdoors, comprises the following steps,

[0039] (1) Unit preparation: with 100 parts by mass of bamboo slices as raw material, the bamboo slices are placed in 0.4mol / L glacial acetic acid and soaked in 0.4mol / L glacial acetic acid, soaked at 75°C for 5min to carry out primary acylation treatment, remove the glacial acetic acid solution, When the temperature drops to 50°C, add 5mol / L maleic anhydride and dicyclohexylcarbodiimide mixture, soak for 15min, and carry out secondary acylation treatment.

[0040] Put the above secondary acylation-treated bamboo slices into 0.7% second-step softening solution, add 0.5% vitamin C at the same time, and carry out enzymatic hydrolysis for 20 minutes.

[0041] Add vegetable oil to alkaline water for emulsification, put the bamboo slices after enzymatic treatment into the emulsified vegetable oil for 20 minutes,

[0042] After the softening treatment, the softened...

Embodiment 2

[0056] A kind of manufacture method of reconstituted bamboo for light-color outdoors, comprises the following steps,

[0057] (1) Unit preparation: with 100 parts by mass of bamboo slices as raw material, the bamboo slices are placed in 0.4mol / L glacial acetic acid and soaked in 0.4mol / L glacial acetic acid, soaked at 75°C for 15min to carry out primary acylation treatment, remove the glacial acetic acid solution, When the temperature drops to 50°C, add 5mol / L maleic anhydride and dicyclohexylcarbodiimide mixture, soak for 20min, and carry out secondary acylation treatment.

[0058] Put the above secondary acylation-treated bamboo slices into 0.7% second-step softening solution, add 0.5% vitamin C at the same time, and carry out enzymatic hydrolysis for 20 minutes.

[0059] Add vegetable oil to alkaline water for emulsification, put the bamboo slices after enzymatic treatment into the emulsified vegetable oil for 20 minutes,

[0060] After the softening treatment, the softene...

Embodiment 3

[0073] A kind of manufacture method of reconstituted bamboo for light-color outdoors, comprises the following steps,

[0074] (1) Unit preparation: with 100 parts by mass of bamboo slices as raw material, the bamboo slices are placed in 0.4mol / L glacial acetic acid and soaked in 0.4mol / L glacial acetic acid, soaked at 75°C for 5min to carry out primary acylation treatment, remove the glacial acetic acid solution, When the temperature drops to 50°C, add 5mol / L maleic anhydride and dicyclohexylcarbodiimide mixture, soak for 15min, and carry out secondary acylation treatment.

[0075] Put the above secondary acylation-treated bamboo slices into 0.7% second-step softening solution, add 0.5% vitamin C at the same time, and carry out enzymatic hydrolysis for 20 minutes.

[0076] Add vegetable oil to alkaline water for emulsification, put the bamboo slices after enzymatic treatment into the emulsified vegetable oil for 20 minutes,

[0077] After the softening treatment, the softened...

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PUM

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Abstract

The invention discloses a manufacturing method of remaking light-colored bamboo for outdoors. By softening, rolling and combing the bamboo, the bamboo is prepared into bamboo fiber bundles , impregnation gluing is carried out in a modified phenolic resin adhesive, after the sizing bamboo fiber bundles are uniformly paved into slabs, the bamboo fiber bundles are fed into a hot press for hot press molding. A bamboo chip softening solution is set to a multi-step implementation softening solution, the soaking softening time of a conventional acid solution or a conventional alkali liquor is reduced, by occurring an acylation reaction of glacial acetic acid, dicyclohexylcarbodiimide and maleic anhydride in a cooperating mode, saccharides, starch and protein can be rapidly decomposed by the acylation reaction on one hand, the damage to a cellulose microstructure is reduced and the breakage of a molecular bond of lignin is reduced, the reaction process of the acylation reaction is mild, the color of the fiber bundles is not deepened, the rinsing process is reduced, the bonding performance of the bamboo fiber bundles and the phenolic resin is increased by modifying the phenolic resin adhesive, and the overall mechanical property of a composite plate is increased by adding filler.

Description

technical field [0001] The invention relates to the technical field of production and application of agricultural by-products, in particular to a production method of light-colored outdoor recombined bamboo. Background technique [0002] my country is a country rich in bamboo resources. Applying bamboo to the field of composite panels improves the utilization rate of bamboo on the one hand, and provides a composite panel with excellent performance on the other hand. Bamboo wood fiberboard is a high-tech green environmental protection material mainly made of wood cellulose and plant cellulose as basic materials, thermoplastic polymer materials, plastics and processing aids, etc., mixed evenly and then heated and extruded by mold equipment. The new decorative material has both the performance and characteristics of wood and plastic, and is a new type of composite material that can replace wood and plastic. Not only has the characteristics of elegant appearance, but also has g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/12B27N3/04B27N1/02B27K9/00B27K5/06B27K3/52B27K3/00B27K3/02B27K3/34B27K3/50C09J161/06C09J11/04C09J11/06
CPCB27K3/002B27K3/0207B27K3/34B27K3/50B27K3/52B27K5/06B27K9/002B27N1/0209B27N3/04B27N3/12C08K2003/221C08K2003/2244C09J11/04C09J11/06C09J161/06C08K13/04C08K7/20C08K3/22C08K5/5435
Inventor 周喆喆张晓春宋剑刚张玉卉
Owner ZHEJIANG FORESTRY UNIVERSITY
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