Method for dyeing superfine fibre synthetic leather by utilizing tannin extract

A technology of superfine fiber and synthetic leather, applied in dyeing, textile and papermaking, etc., can solve the problems of restricting product development, producing a single variety of products, and being difficult to meet market requirements, and achieving the effect of improving dyeing fastness.

Inactive Publication Date: 2013-05-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the components of microfiber nonwovens need to be dyed in the later stage, and the coloring in the early stage will limit the product development in the later stage, and the product variety is single, which is difficult to meet the market requirements; A method and a combination of the technical advantages of (4) and (5), also reflects the technical defects of (4) and (5)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Put superfine fiber synthetic leather into the drum and add 80°C hot water of 1200% of its mass and 8% wattle extract to rotate for 100 minutes;

[0020] 2) Add industrial formic acid to the drum to adjust the pH value of the dyeing bath to 4.5, and rotate for 100 minutes;

[0021] 3) Add 3% FeSO of superfine fiber synthetic leather quality in the rotating drum 4 , rotate for 100 minutes;

[0022] 4) Add the cross-linking agent glutaraldehyde of 2% of superfine fiber synthetic leather quality in the drum and rotate for 100 minutes to discharge the liquid;

[0023] 5) Add 80°C hot water with 1200% superfine fiber synthetic leather quality to the drum after draining, and drain the liquid again after rotating for 5 minutes;

[0024] 6) Add 80°C hot water with 1200% superfine fiber synthetic leather quality to the drained drum, rotate for 5 minutes and drain the liquid again to obtain dyed superfine fiber synthetic leather.

Embodiment 2

[0026] 1) put the microfiber synthetic leather into the drum and add 800% of its quality hot water at 65°C and 10% bayberry extract to rotate for 80 minutes;

[0027] 2) Add industrial formic acid to the drum to adjust the pH value of the dyeing bath to 4.8, and rotate for 80 minutes;

[0028] 3) Add 2% FeSO of superfine fiber synthetic leather quality in the rotating drum 4 , rotate for 80 minutes;

[0029] 4) Add 1% cross-linking agent modified glutaraldehyde of superfine fiber synthetic leather quality to the rotating drum and discharge the liquid after rotating for 80 minutes;

[0030] 5) Add 65°C hot water with 800% superfine fiber synthetic leather quality to the drained drum, and drain the liquid again after rotating for 8 minutes;

[0031] 6) Add hot water at 65°C with 800% superfine fiber synthetic leather quality to the drum after draining, rotate for 8 minutes and drain the liquid again to obtain superfine fiber synthetic leather after dyeing.

Embodiment 3

[0033] 1) Superfine fiber synthetic leather is packed into the rotating drum and add 95 ℃ hot water of 600% of its quality and 4% larch extract to rotate for 60 minutes;

[0034] 2) Add industrial formic acid to the drum to adjust the pH value of the dyeing bath to 5.0, and rotate for 60 minutes;

[0035]3) Add the CoCl of superfine fiber synthetic leather quality 1% in the rotating drum 2 , rotate for 60 minutes;

[0036] 4) Add the cross-linking agent oxazolidine tanning agent of 3% of superfine fiber synthetic leather quality to the rotating drum and discharge the liquid after rotating for 60 minutes;

[0037] 5) Add 95°C hot water with 600% superfine fiber synthetic leather quality to the drained drum, and drain the liquid again after rotating for 10 minutes;

[0038] 6) Add 95° C. hot water of 600% of the superfine fiber synthetic leather quality to the drained drum, rotate for 10 minutes and drain the liquid again to obtain the dyed superfine fiber synthetic leather. ...

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PUM

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Abstract

The invention discloses a method for dyeing superfine fibre synthetic leather by utilizing a tannin extract, comprising the following steps of: placing the superfine fibre synthetic leather into a revolving drum, adding hot water and the tannin extract to rotate; then, adding industrial formic acid to adjust the pH value of dyeing bath liquid, then, adding metal salt containing Fe<2+>, Fe<3+>, Co2 or Cu<2+> and a cross-linking agent, rotating and discharging the liquid; and repeatedly adding hot water into the revolving drum without the liquid to clean to obtain dyed superfine fibre syntheticleather. In the method, the natural tannin extract is selected to ensure that two components, i.e., a superfine fibre and polyurethane, of the superfine fibre synthetic leather are simultaneously colored, so that the problem of dyeing difference of the two components of the superfine fibre synthetic leather is solved; the metal salt containing Fe<2+>, Fe<3+>, Co2 or Cu<2+> and the tannin extract are added to generate compounds with different colors to dye the superfine fibre synthetic leather into different colors, and the metal salt can be used for fixing the tannin extract and improving thedyeing fastness; and the cross-linking agent can undergo a cross-linking reaction with the tannin extract to further fix the tannin extract and improve the dyeing fastness.

Description

technical field [0001] The invention relates to a production process of superfine fiber synthetic leather, in particular to a method for dyeing superfine fiber synthetic leather by using tannin extract. Background technique [0002] Tannin extract is a chemical product obtained by processing tannin-rich plant raw materials through water extraction and concentration. The main component is plant tannin. Plant tannins have a complex polyphenolic structure and mainly exist in the bark, root, leaf, and fruit of plants, and their content in plants is second only to cellulose, hemicellulose, and lignin. Tannin extract is usually brownish-yellow to tan, powdery or lumpy, and is mainly used for tanning natural leather. It is usually called vegetable tanning agent in the tanning industry. Because most of the tannin extract itself has a certain color, and the polyphenols in the tannin extract and the Fe 2+ , Fe 3+ 、Co 2 or Cu 2+ and other metal salts (such as FeSO 4 , CuCl 2 、Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/34D06P1/651D06P1/642D06P1/673D06P3/85
Inventor 马兴元蒋坤郭勇生
Owner SHAANXI UNIV OF SCI & TECH
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