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A green and environment-friendly dyeing process of superfine fiber synthetic leather

An ultra-fine fiber, green and environmentally friendly technology, applied in the field of synthetic leather dyeing, can solve the problems of high chromaticity value and COD value of dyeing wastewater, difficult wastewater treatment, uneven dyeing, etc., to improve the dyeing rate and uniformity. The effect of dyeability, good mechanical strength and thermal stability, strong structure

Active Publication Date: 2020-09-08
义乌市赛恩斯高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the conventional microfiber synthetic leather dyeing process, uneven dyeing, not deep, and poor color fastness are the most common and most difficult problems, and the addition of a large number of dyeing auxiliaries makes the chroma value and COD value of dyeing wastewater remain high , the wastewater treatment is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dyeing of microfiber synthetic leather:

[0029] (1) Dye liquor preparation: uniformly disperse the disperse dye microcapsules in water, the bath ratio is 1:30, and the pH value is 6-7 to obtain the dye liquor;

[0030] (2) Microfiber synthetic leather pretreatment: Add sodium hexametaphosphate and citric acid to the water, stir and dissolve completely to obtain a pretreatment solution, then immerse 25kg of superfine fiber synthetic leather in the pretreatment solution, and heat at 1°C Raise the temperature to 50-60°C and keep it warm for 30 minutes at a heating rate of / min, continue to heat up to 75-85°C and keep it warm for 10 minutes, wash the microfiber synthetic leather 3 times with water, and complete the pretreatment of the superfine fiber synthetic leather;

[0031] (3) Dyeing: immerse the pretreated superfine fiber synthetic leather in the dyeing solution, and raise the temperature to 75-85°C at a heating rate of 1°C / min and keep it for 30 minutes, then raise ...

Embodiment 2

[0034] Dyeing of microfiber synthetic leather:

[0035] (1) Dye liquor preparation: uniformly disperse the disperse dye microcapsules in water, the bath ratio is 1:30, and the pH value is 6-7 to obtain the dye liquor;

[0036] (2) Microfiber synthetic leather pretreatment: Add sodium hexametaphosphate and citric acid to the water, stir and dissolve completely to obtain a pretreatment solution, then immerse 25kg of superfine fiber synthetic leather in the pretreatment solution, and heat at 1°C Raise the temperature to 50-60°C and keep it warm for 30 minutes at a heating rate of / min, continue to heat up to 75-85°C and keep it warm for 10 minutes, wash the microfiber synthetic leather 3 times with water, and complete the pretreatment of the superfine fiber synthetic leather;

[0037] (3) Dyeing: immerse the pretreated superfine fiber synthetic leather in the dyeing solution, and raise the temperature to 75-85°C at a heating rate of 1°C / min and keep it for 30 minutes, then raise ...

Embodiment 3

[0044] Dyeing of microfiber synthetic leather:

[0045] (1) Dye liquor preparation: uniformly disperse the disperse dye microcapsules in water, the bath ratio is 1:30, and the pH value is 6-7 to obtain the dye liquor;

[0046] (2) Microfiber synthetic leather pretreatment: Add sodium hexametaphosphate and citric acid to the water, stir and dissolve completely to obtain a pretreatment solution, then immerse 25kg of superfine fiber synthetic leather in the pretreatment solution, and heat at 1°C Raise the temperature to 50-60°C and keep it warm for 30 minutes at a heating rate of / min, continue to heat up to 75-85°C and keep it warm for 10 minutes, wash the microfiber synthetic leather 3 times with water, and complete the pretreatment of the superfine fiber synthetic leather;

[0047] (3) Dyeing: immerse the pretreated superfine fiber synthetic leather in the dyeing solution, and raise the temperature to 75-85°C at a heating rate of 1°C / min and keep it for 30 minutes, then raise th...

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Abstract

The invention discloses an environment-friendly dyeing process of ultrafine fiber synthetic leather and relates to the technical field of dyeing of synthetic leather. The environment-friendly dyeing process of the ultrafine fiber synthetic leather comprises the following steps: (1) preparing dye liquid; (2) pretreating ultrafine fiber synthetic leather; (3) dyeing. The prepared microcapsule structure is firm, and high in mechanical strength and heat-resistant stability, no dyeing aid needs to be added additionally when the ultrafine fiber synthetic leather is applied to dyeing of the ultrafinefiber synthetic leather, and water washing is not needed after dyeing; the treatment difficulty of waste water generated by dyeing is low; the ultrafine fiber synthetic leather is softened through pretreatment on the ultrafine fiber synthetic leather, the dye can be attached to the fiber rapidly and firmly in the subsequent dyeing process, and the dye-uptake and the level dyeing property are improved, so that the utilization rate of the dye is increased and the residual quantity of the dye in the waste water is reduced.

Description

Technical field: [0001] The invention relates to the technical field of synthetic leather dyeing, in particular to a green and environment-friendly dyeing process of superfine fiber synthetic leather. Background technique: [0002] Microfiber synthetic leather is a new type of high-grade artificial leather made of extremely fine fibers. It can be used in various fields such as shoes, bags, furniture, and automotive interiors. It has the characteristics of genuine leather and has superior indicators than genuine leather. Polyurethane synthetic leather based on three-dimensional network structure superfine fiber nonwoven fabric is a new generation of synthetic leather developed in recent years. Some people call it the fourth generation of artificial leather. It is comparable to high-grade natural leather and has the inherent characteristics of natural leather. Excellent moisture absorption and breathability, and surpasses natural leather in terms of chemical resistance, waterp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P3/26D06P1/00D06P1/16D06P1/653D06P1/673
CPCD06P1/0016D06P1/0032D06P1/16D06P1/6533D06P1/67366D06P3/26
Inventor 江兵
Owner 义乌市赛恩斯高分子材料有限公司
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