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Dyeing process for superfine fiber synthetic leather

A technology of ultra-fine fiber and synthetic leather, applied in the field of chemical fiber textile, can solve the problems of uneven color, affect the dyeing effect, white frost, etc., and achieve the effect of good diffusion performance, simple dyeing method and good coverage.

Inactive Publication Date: 2015-01-21
刘自忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the color of the two phases of ultra-fine nylon and polyurethane tends to be different, resulting in "white frost" on the surface
Influence of PU resin: If the distribution of PU resin in microfiber leather is uneven, it will also affect the dyeing effect, and at the same time, the coloring performance of different resins will also affect the dyeing effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0014] Example 1, a kind of disperse dye characteristics of superfine fiber synthetic leather dyeing process:

[0015] The dyeing mechanism of superfine fiber is: nylon fiber is an amphoteric fiber, which can not only absorb hydrogen ions in the dye solution to be positively charged, but also absorb hydroxide ions in the dye solution to be negatively charged, so ionic dyes can be used To stain. For example: acid dyes, neutral dyes, reactive dyes, direct dyes, basic dyes can be used. The macromolecules in polyurethane contain amide groups, which can be combined with acid and neutral dyes to meet the dyeing requirements. The dyes and dyeing process for dyeing superfine fiber synthetic leather are that there are many kinds of dyes used alone for PA6 and polyurethane dyeing, including acid dyes, neutral dyes, disperse dyes, reactive dyes, etc. When PA6 and polyurethane are dyed separately, the above single dye may have a good effect, but for sea-island microfiber synthetic leath...

example 2

[0019] Example 2, a kind of neutral dye dyeing of superfine fiber synthetic leather dyeing process

[0020] Neutral dyes are 1:2 type acid mordant dyes, metal atoms and dye molecules are complexed at a ratio of 1:2. There are no water-soluble groups such as sulfonic acid groups in the dye molecule, but only hydrophilic groups with low water solubility, such as sulfonylamino (-SO NHR), methylsulfone (-SO CH ), etc., they Generally, it is dyed in neutral or weakly acidic medium, which is the origin of the name. There are a large number of amino carboxyl end groups in the molecule of nylon, which can be dyed with neutral dyes to obtain a darker color, and has better wet fastness and light fastness; the color matching performance between dyes is good, and it is relatively Less competing dyeing phenomenon, high dye utilization rate; dyeing process is relatively simple. However, neutral dyes have incomplete chromatograms, and because the dye molecules contain metal ions, the color...

example 3

[0023] Example 3, two kinds of dyestuffs same-bath dyeing characteristics of a superfine fiber synthetic leather dyeing process

[0024] Direct dyes have a large molecular weight and are difficult to dye inside the fiber, and are prone to ring dyeing and white cores. At the same time, the color fastness is poor. Such dyes are not suitable for base fabric dyeing.

[0025] Reactive dyes are a class of dyes that can chemically react with the macromolecules of fibers to form covalent bonds. For polyamide fiber dyeing, the crust leather has bright color, high color fastness and easy dyeing. However, due to the small number of amino groups in the polyamide fiber molecule, the color yield is low and the leveling property is poor.

[0026] The color fastness of cationic dyes is difficult to meet the requirements, so it is not suitable to use such dyes in base fabric dyeing. It can be seen that in the dyeing process of sea-island superfine fiber synthetic leather, a single variety ...

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Abstract

The invention discloses a dyeing process for superfine fiber synthetic leather. By means of a dispersed dye dyeing process, the color tone is adjusted and the level dyeing degree is enhanced. By means of a neutral dye dyeing process, a deep color, wet treatment fastness and light fastness can be obtained. According to a two-dye one-bath dyeing process, the proportions of different components in the mixed dye are adjusted to investigate the dyeing effect and different-index dyeing curves, dyes with similar dyeing properties are selected for compatibility, and at the same time a proper dyeing assistant is employed to strengthen similar compatible performance between dyes. The dispersed dye has the advantages of small molecular weight, good diffusion performance, simple dyeing method, good level dyeing property, excellent light fastness and good coverage, and can avoid uneven dyeing phenomenon caused by molecular size differences during chinlon polymerization or different stretching degrees during spinning. Dyeing with a neutral dye can achieve deep color, good wet treatment fastness and light fastness. Dyes have good color matching performance, few competitive phenomena exist, and the dye utilization rate is high. The dyeing process is relatively simple.

Description

technical field [0001] The invention relates to the technical field of chemical fiber textiles, in particular to a superfine fiber synthetic leather dyeing process. Background technique [0002] Dyeing of chemical fiber fibers Since the fineness of nylon fibers in microfiber leather is only 0.0001-0.001 denier, the adsorption speed of dyes is very fast, and the level dyeing property is very poor, and the finer the fibers, the worse the level dyeing properties; Fine, the larger the specific area, the worse the color rendering; the finer the fiber, the easier the dye in the fiber migrates to the fiber surface, the worse the color fastness, at the same time, the finer the fiber, the more dye used, the water fastness The worse the degree and rubbing fastness. Therefore, the dyeing of microfiber artificial leather becomes a worldwide difficult problem. If the thickness of the non-woven fabric in the microfiber leather is uneven and the fiber distribution is uneven, it will also...

Claims

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Application Information

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IPC IPC(8): D06P3/32D06P3/26D06P1/16D06P1/39D06P1/44
Inventor 刘自忠
Owner 刘自忠
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