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Preparation method of chitosan-based dyeing auxiliary for superfine fiber synthetic leather dyeing

A technology of ultrafine fiber and chitosan, which is applied in the direction of dyeing, textiles and papermaking, etc., can solve the problems of polyamide ultrafine fiber dyeing performance difference, inability to obtain dyeing effect, limited active groups, etc., to improve dyeing aid effect, enhance the effect of dyeing aid, improve the effect of hydrophilicity

Active Publication Date: 2018-09-28
山东众兴泽辉新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyamide microfibers contain limited active groups, and only contain carboxyl and amino groups at the end of the molecular chain. There are a large number of carbon chains and amide bonds on the molecular chain, but there are no side chains. Therefore, the dyeing of superfine fiber synthetic leather mainly depends on The deposition of the dye itself makes the fiber color, most of the dyes are difficult to dye, and the color fastness of the dyed product is poor
Moreover, microfiber synthetic leather is a composite material, and the dyeing properties of polyamide microfiber and polyurethane are significantly different. It is difficult to meet the dyeing requirements of the two components at the same time by using a single dye and a single dyeing method, so good dyeing cannot be obtained. Effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Low temperature and high pressure treatment of chitosan: add chitosan in the autoclave, and add water to make the water content reach 50wt%, utilize nitrogen to replace the air in the still, continue to feed nitrogen to make the pressure in the still reach 2MPa, and heat up Make the temperature in the kettle reach 45°C, keep stirring for 10 minutes, continue feeding nitrogen to make the pressure in the kettle reach 3 MPa, then raise the temperature to make the temperature inside the kettle reach 65°C, keep stirring for 5 minutes, stop feeding nitrogen, discharge the obtained paste, and then The paste is sent into a freeze dryer, and the dried solid is made into a micropowder through an ultrafine pulverizer to obtain hydrophilic chitosan;

[0026] (2) chemical modification of chitosan: the made 100g hydrophilic chitosan is added in water, the gel that forms water content 70wt% is formed through stirring dispersion, then adds pyroglutamic acid saturated aqueous solutio...

Embodiment 2

[0030] (1) Low temperature and high pressure treatment of chitosan: add chitosan in the autoclave, and add water to make the water content reach 50wt%, utilize nitrogen to replace the air in the still, continue to feed nitrogen to make the pressure in the still reach 2MPa, and heat up Make the temperature in the kettle reach 45°C, keep stirring for 10 minutes, continue feeding nitrogen to make the pressure in the kettle reach 3 MPa, then raise the temperature to make the temperature inside the kettle reach 65°C, keep stirring for 5 minutes, stop feeding nitrogen, discharge the obtained paste, and then The paste is sent into a freeze dryer, and the dried solid is made into a micropowder through an ultrafine pulverizer to obtain hydrophilic chitosan;

[0031] (2) chemical modification of chitosan: the made 100g hydrophilic chitosan is added in water, the gel that forms water content 70wt% is formed through stirring dispersion, then adds pyroglutamic acid saturated aqueous solutio...

Embodiment 3

[0035] (1) Low temperature and high pressure treatment of chitosan: add chitosan in the autoclave, and add water to make the water content reach 50wt%, utilize nitrogen to replace the air in the still, continue to feed nitrogen to make the pressure in the still reach 2MPa, and heat up Make the temperature in the kettle reach 45°C, keep stirring for 10 minutes, continue feeding nitrogen to make the pressure in the kettle reach 3 MPa, then raise the temperature to make the temperature inside the kettle reach 65°C, keep stirring for 5 minutes, stop feeding nitrogen, discharge the obtained paste, and then The paste is sent into a freeze dryer, and the dried solid is made into a micropowder through an ultrafine pulverizer to obtain hydrophilic chitosan;

[0036] (2) chemical modification of chitosan: the made 100g hydrophilic chitosan is added in water, the gel that forms water content 70wt% is formed through stirring dispersion, then adds pyroglutamic acid saturated aqueous solutio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a preparation method of a chitosan-based dyeing auxiliary for superfine fiber synthetic leather dyeing, and relates to the technical field of dyeing auxiliary processing. The method comprises the following steps of (1) chitosan low-temperature high-pressure treatment; (2) chitosan chemical modification; (3) auxiliary material preparation; (4) dyeing auxiliary preparation. Through the matched use of auxiliary materials, the assisted dyeing effect of the prepared dyeing auxiliary on the superfine fiber synthetic leather is enhanced; particularly through the addition of unconventional substances of sodium gluconate and self-made nanometer glue powder in the field, further, the prepared dyeing auxiliary can obviously improve the dye uptake of the superfine fiber synthetic leather and enhance the color fastness of the dyed superfine fiber synthetic leather.

Description

Technical field: [0001] The invention relates to the technical field of dyeing auxiliaries, in particular to a preparation method of chitosan-based dyeing auxiliaries for dyeing superfine fiber synthetic leather. Background technique: [0002] Superfine fiber synthetic leather is a high-grade synthetic leather similar to natural leather made of polyamide superfine fiber as the matrix layer and polyurethane as the elastomer. The structure of the polyamide superfine fiber is similar to that of natural leather protein collagen fibers. PU moisture-permeable polyurethane resin has strong durability and has a good development prospect. [0003] Polyamide microfibers contain limited active groups, and only contain carboxyl and amino groups at the end of the molecular chain. There are a large number of carbon chains and amide bonds on the molecular chain, but there are no side chains. Therefore, the dyeing of superfine fiber synthetic leather mainly depends on The deposition of the...

Claims

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Application Information

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IPC IPC(8): D06P1/48D06P1/613D06P1/649D06P1/651D06P1/653D06P1/673C08B37/08
CPCC08B37/003D06P1/48D06P1/6136D06P1/6496D06P1/65125D06P1/6533D06P1/673
Inventor 汪涛
Owner 山东众兴泽辉新材料股份有限公司