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Microfiber synthetic leather dyeing technology aimed at improving dye uptake and color fastness

A technology of superfine fiber and synthetic leather, applied in the field of synthetic leather dyeing, can solve the problems of polyamide superfine fiber dyeing performance difference, inability to obtain dyeing effect, poor color fastness of products, etc., to enhance color fastness to washing, improve Dyeing aid effect, effect of improving dye uptake rate

Active Publication Date: 2018-10-02
YANCHENG HONGGUI KNITTING CO LTD
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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 natto gum: 50g of water-treatment grade natto gum was added to the autoclave, and water was added to make the water content reach 45wt%, and nitrogen was used to replace the air in the autoclave and continue to feed nitrogen to make the pressure in the autoclave reach 45% by weight. 2MPa, and heat up to make the temperature in the kettle reach 50°C, keep stirring for 10 minutes, continue to feed nitrogen to make the pressure in the kettle reach 3MPa, heat up again to make the temperature in the kettle reach 65°C, keep stirring for 5 minutes, stop feeding nitrogen, and discharge the obtained paste body, and then the paste is sent to a freeze dryer, and the solid obtained by drying is made into micropowder by an ultrafine pulverizer;

[0026] (2) Preparation of auxiliary materials: fully mix 2g sodium lauroyl glutamate and 2.5g dodecyl glucoside to make granules by dry granulation, and then make micropowders through ultraf...

Embodiment 2

[0031] (1) Low temperature and high pressure treatment of natto gum: 50g of water-treatment grade natto gum was added to the autoclave, and water was added to make the water content reach 45wt%, and nitrogen was used to replace the air in the autoclave and continue to feed nitrogen to make the pressure in the autoclave reach 45% by weight. 2MPa, and heat up to make the temperature in the kettle reach 50°C, keep stirring for 10 minutes, continue to feed nitrogen to make the pressure in the kettle reach 3MPa, heat up again to make the temperature in the kettle reach 65°C, keep stirring for 5 minutes, stop feeding nitrogen, and discharge the obtained paste body, and then the paste is sent to a freeze dryer, and the solid obtained by drying is made into micropowder by an ultrafine pulverizer;

[0032] (2) Preparation of auxiliary materials: fully mix 2.5 g of sodium lauroyl glutamate and 2 g of dodecyl glucoside to make granules by dry granulation, and then use an ultrafine pulveri...

Embodiment 3

[0037] (1) Low temperature and high pressure treatment of natto gum: 50g of water-treatment grade natto gum was added to the autoclave, and water was added to make the water content reach 45wt%, and nitrogen was used to replace the air in the autoclave and continue to feed nitrogen to make the pressure in the autoclave reach 45% by weight. 2MPa, and heat up to make the temperature in the kettle reach 50°C, keep stirring for 10 minutes, continue to feed nitrogen to make the pressure in the kettle reach 3MPa, heat up again to make the temperature in the kettle reach 65°C, keep stirring for 5 minutes, stop feeding nitrogen, and discharge the obtained paste body, and then the paste is sent to a freeze dryer, and the solid obtained by drying is made into micropowder by an ultrafine pulverizer;

[0038] (2) Preparation of excipients: 2.5g sodium lauroyl glutamate, 2.5g nano-gel powder and 2g dodecyl glucoside are fully mixed, then dry granulated to make granules, and then ultrafine p...

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Abstract

The invention discloses a microfiber synthetic leather dyeing technology aimed at improving the dye uptake and the color fastness, and relates to the technical field of synthetic leather dyeing. The technology comprises the following steps: (1) low-temperature and high-pressure treatment of natto gum, (2) preparation of excipients, (3) preparation of a dyeing auxiliary, (4) pretreatment of microfiber synthetic leather, (5) dyeing of the microfiber synthetic leather. According to the invention, the pre-treatment of the microfiber synthetic leather is performed to expose a part of active groupson the surface thereof, and the active groups on the microfiber synthetic leather are further increased through the dyeing auxiliary, that is, a binding point of dye molecules is increased, thereby improving the dye uptake; at the same time, by the cooperation of the dyeing auxiliary, the color fastness of the microfiber synthetic leather after dyeing is enhanced, especially the color fastness towashing.

Description

Technical field: [0001] The invention relates to the technical field of synthetic leather dyeing, in particular to an efficient dyeing process for superfine fiber synthetic leather. Background technique: [0002] Microfiber synthetic leather is a high-grade synthetic leather similar to natural leather made of polyamide microfiber as the base layer and polyurethane as the elastomer. Its polyamide microfiber is similar in structure to natural leather protein collagen fibers. PU moisture-permeable polyurethane resin has strong durability and good development prospects. [0003] Polyamide microfibers contain limited active groups, only carboxyl and amino groups at the end of the molecular chain, and there are a large number of carbon chains and amide bonds on the molecular chain, but no side chains, so the dyeing of microfiber synthetic leather mainly relies on The deposition of the dye itself makes the fiber color, most of the dyes are difficult to dye, and the color fastness ...

Claims

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Application Information

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IPC IPC(8): D06P1/38D06P1/39D06P1/46D06P1/613D06P1/649D06P1/651D06P1/673
CPCD06P1/38D06P1/39D06P1/46D06P1/6136D06P1/6495D06P1/65118D06P1/65125D06P1/67391
Inventor 汪涛
Owner YANCHENG HONGGUI KNITTING CO LTD
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