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Rotary drum dyeing method for fractionally dyeing superfine fiber synthetic leathers with multi-component dyes

A microfiber, drum dyeing technology, applied in dyeing method, textile material processing, liquid/gas/steam textile material processing, etc., can solve the problems of restricting product development, difficult to meet market requirements, and single product variety.

Inactive Publication Date: 2010-08-11
浙江温州轻工研究院
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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; This method combines the technical advantages of (4) and (5), but also reflects the technical defects of (4) and (5)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: 1) According to the size of the production batch, select drums with different loads, put the microfiber synthetic leather to be processed into the drum, and add 100% superfine fiber synthetic leather to the drum. Hot water at 60°C and 1% low-temperature disperse black L / BT, rotate for 30-60 minutes;

[0024] 2) Mix industrial formic acid and water at a volume ratio of 1:10 to obtain a formic acid solution, and then pour the formic acid solution into the drum to adjust the pH value of the dyeing bath to 5.5, and rotate for 30 to 60 minutes;

[0025] 3) Then add weak acid black 2GB with 3% superfine fiber synthetic leather mass to the drum and rotate for 30-60 minutes;

[0026] 4) Add the above-mentioned formic acid solution to the drum to adjust the pH value of the dyeing bath to 4.0, and rotate for 30-60 minutes;

[0027] 5) Add color-fixing agent R4BN of 2% of the mass of superfine fiber synthetic leather to the drum, and drain the liquid after rotating for...

Embodiment 2

[0032] Example 2: 1) According to the size of the production batch, select drums with different loads, put the microfiber synthetic leather to be processed into the drum, and add 200% superfine fiber synthetic leather to the drum. 70°C hot water and 3% low-temperature disperse yellow E-GL, rotate for 30-60 minutes;

[0033] 2) Mix industrial formic acid and water at a volume ratio of 1:10 to obtain a formic acid solution, and then pour the formic acid solution into the drum to adjust the pH value of the dyeing bath to 5.5, and rotate for 30 to 60 minutes;

[0034] 3) Then add weak acid orange GSN with 1% of the mass of superfine fiber synthetic leather to the drum and rotate for 30-60 minutes;

[0035] 4) Add the above-mentioned formic acid solution to the drum to adjust the pH value of the dyeing bath to 4.0, and rotate for 30-60 minutes;

[0036]5) Add color-fixing agent BE-S with 1% of the mass of superfine fiber synthetic leather to the drum, rotate for 30-60 minutes and ...

Embodiment 3

[0041] Example 3: 1) According to the size of the production batch, select drums with different loads, put the microfiber synthetic leather to be processed into the drum, and add 300% superfine fiber synthetic leather to the drum. Hot water at 55°C and 2% low-temperature disperse red FB, rotate for 30-60 minutes;

[0042] 2) Mix industrial formic acid and water at a volume ratio of 1:10 to obtain a formic acid solution, and then pour the formic acid solution into the drum to adjust the pH value of the dyeing bath to 5.5, and rotate for 30 to 60 minutes;

[0043] 3) Then add 2% of the weight of superfine fiber synthetic leather to the drum and rotate it for 30-60 minutes;

[0044] 4) Add the above-mentioned formic acid solution to the drum to adjust the pH value of the dyeing bath to 4.0, and rotate for 30-60 minutes;

[0045] 5) Add color-fixing agent CS-1 of 1.3% superfine fiber synthetic leather mass to the drum, and drain the liquid after rotating for 30-60 minutes;

[00...

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Abstract

The invention discloses a rotary drum dyeing method for fractionally dyeing superfine fiber synthetic leathers with multi-component dyes. The most common rotary drum equipment used in the natural leather processing process is adopted in the method. The method comprises the following steps of: adding a low temperature disperse dye to color polyurethane component in the superfine fiber synthetic leathers; lowering the pH value of dyeing solution to 5.5; adding a weak acid dye in the solution to color superfine fiber nonwoven fabric component in the superfine fiber synthetic leathers; lowering the pH value of the dyeing solution to 4.0; adding polycationic color fixing agent to fix the color; washing the leathers with water once after the completion; replacing the original dyeing solution with new dyeing solution; adding a neutral dye for dyeing; and washing the leathers with water once after dyeing. The disperse dye and the weak acid dye selected in the invention color the polyurethane component and the superfine fiber nonwoven fabric component in the superfine fiber synthetic leathers desirably; the neutral dye added in the final step enables evener and thicker color on the surface of the superfine fiber synthetic leathers; and thus the problem of dyeing difference between the two components in the superfine fiber synthetic leathers is solved.

Description

technical field [0001] The invention relates to a production process of superfine fiber synthetic leather, in particular to a drum dyeing method of stepwise dyeing with multi-component dyes for superfine fiber synthetic leather. Background technique [0002] Natural leather resources are limited, and the production process will produce relatively large pollution. The development of artificial synthetic leather with excellent performance has become the pursuit of human beings. Among them, the superfine fiber non-woven fabric with three-dimensional network structure is used as the reinforcing material, and the superfine fiber synthetic leather obtained by impregnating polyurethane is close to the microfiber in terms of internal microstructure, appearance texture, physical properties and people's wearing comfort. Made of natural leather. According to statistics, as of 2008, the production capacity of China's superfine fiber synthetic leather is about 75 million square meters, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06B5/22D06B5/26D06P1/16D06P1/39D06P5/08
Inventor 马兴元
Owner 浙江温州轻工研究院
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