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Method for improving soft wood chip machining performances

A technology of processing performance and wood chips, applied in wood processing equipment, wood treatment, impregnated wood, etc., can solve the problems of affecting the performance of soft wood chips, restricting the use of soft wood chips, and easy deformation of soft wood chips, so as to improve the softening performance , increase the scope of application, reduce the effect of elastic modulus

Inactive Publication Date: 2018-01-09
阜南县猛发工艺品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development of the wood industry and the emergence of new wood softening technologies, the research on the development of wood processing and comprehensive utilization of new technologies has developed rapidly in the world, especially the surface densification of soft wood in plantations has become more prominent. Soft wood chips are widely used in veneer furniture and woven fabrics. In the process of production and use, moldy spots will easily appear. At the same time, soft wood chips are easily deformed in a humid environment, which will also affect the performance of soft wood chips. Among them, poplar , cedar, and masson pine are soft, low in density, and poor in processing performance. Therefore, the use of soft wood chips is severely limited, and soft wood chips need to be processed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for improving the processing performance of soft wood chips, comprising the steps of:

[0014] (1) Process the collected wood into wood chips with a thickness of 4mm, treat them in hot water at a temperature of 55°C, and treat them with a microwave with an output power of 680W for 6 minutes, and wrap them with a multi-layer polyvinyl chloride film Wrapped with wood chips, keep warm at a temperature of 70°C for standby;

[0015] (2) Each component is calculated by volume, dilute and dissolve the phenolized modified lignin with water to a weight content of 50%, take 22 parts and 58 parts of epichlorohydrin, mix and stir, and heat to 70°C under a nitrogen atmosphere. Then dropwise add 24 parts of mass concentration of 20% sodium hydroxide solution and 10 parts of dodecyltrimethylammonium chloride, after reacting for 3 hours, remove solvent and unreacted epichlorohydrin, under nitrogen protection Add toluene to fully dissolve it, then add sodium hydroxide solution...

Embodiment 2

[0019] A method for improving the processing performance of soft wood chips, comprising the steps of:

[0020] (1) Process the collected wood into wood chips with a thickness of 4.5mm, treat them in hot water at a temperature of 60°C, and treat them with a microwave with an output power of 650W for 8 minutes, and cover them with multi-layer polyvinyl chloride film after completion Wrap the wood chips and keep them warm at a temperature of 60°C for later use;

[0021] (2) Each component is calculated by volume, dilute and dissolve the phenolized modified lignin with water to a weight content of 50%, take 25 parts and 55 parts of epichlorohydrin, mix and stir, and heat to 70°C under a nitrogen atmosphere. Then dropwise add 26 parts of mass concentration of 20% sodium hydroxide solution and 12 parts of dodecyltrimethylammonium chloride, after reacting for 2 hours, remove solvent and unreacted epichlorohydrin, under nitrogen protection Add toluene to fully dissolve it, then add s...

Embodiment 3

[0025] A method for improving the processing performance of soft wood chips, comprising the steps of:

[0026] (1) Process the collected wood into wood chips with a thickness of 2.5mm, treat them in hot water at a temperature of 50°C, and treat them with a microwave with an output power of 700W for 6 minutes, and cover them with multi-layer polyvinyl chloride film after completion Wrap the wood chips and keep them warm for later use at a temperature of 80°C;

[0027] (2) Each component is calculated by volume, dilute and dissolve the phenolized modified lignin with water to a weight content of 50%, take 20 parts and 60 parts of epichlorohydrin, mix and stir, and heat to 70°C under a nitrogen atmosphere. Then dropwise add 22 parts of mass concentration of 20% sodium hydroxide solution and 8 parts of dodecyltrimethylammonium chloride, after reacting for 4 hours, remove solvent and unreacted epichlorohydrin, under nitrogen protection Add toluene to fully dissolve it, then add so...

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Abstract

The invention belongs to the technical field of soft wood chip processing, and in particular, relates to a method for improving soft wood chip machining performances. The method comprises the steps ofpretreatment of wood chips, preparation of modified resins, dipping of the resins and hot pressing. Compared with the prior art, the method has the following advantages: the modified resins are prepared through phenolization modified lignin, so that phenolic hydroxyl groups of the resins are increased, the activity is improved, and the stability is better; through combination between microwaves and heat treatment, the activity of cellulose microfibers in amorphous areas of the wood chips is improved; hydroxyl groups are generated therebetween, so that the microfibers in the amorphous areas are ordered; the hydroxyl of the microfibers on the surfaces of crystalline areas can be exposed, so that the generation number of hydrogen bonds in the crystalline areas of celluloses is increased, andthe softening performance is improved; and after the modified resins are dipped, the compression rate of the wood chips can be increased, the surface-compact wood chips are obtained, meanwhile, the dry bending resistance is improved, the surface wear resistance is improved, and the application range of the wood chips is widened.

Description

technical field [0001] The invention belongs to the technical field of soft wood chips processing, and in particular relates to a method for improving the processing performance of soft wood chips. Background technique [0002] In recent years, with the development of the wood industry and the emergence of new wood softening technologies, the research on the development of wood processing and comprehensive utilization of new technologies has developed rapidly in the world, especially the surface densification of soft wood in plantations has become more prominent. Soft wood chips are widely used in veneer furniture and woven fabrics. In the process of production and use, moldy spots will easily appear. At the same time, soft wood chips are easily deformed in a humid environment, which will also affect the performance of soft wood chips. Among them, poplar , cedar, and masson pine are soft, low in density, and poor in processing performance. Therefore, the use of soft wood chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/50B27K5/00B27K5/06C08H7/00
Inventor 李明李东猛
Owner 阜南县猛发工艺品有限公司