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Method for improving dyeing property of superfine fiber synthetic leather base cloth

A technology of synthetic leather base fabric and ultra-fine fiber, which is applied in the directions of dyeing, fiber processing, textile and paper making, etc., to achieve the effects of resource utilization, low cost and simple extraction method

Active Publication Date: 2014-02-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, researchers have mainly conducted research on dyeing dyes, dyeing conditions, chemical modification and additives. Although many achievements have been made, there is still a big gap from industrial production, so continue to study and improve ultrafine The method of dyeing performance of fiber synthetic leather is very necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Preparation of collagen:

[0032] Add water to the gelatin, stir to swell the gelatin to obtain a gelatin solution with a mass concentration of 20%, use 1mol / L sodium hydroxide solution to adjust the pH of the gelatin solution to 8.5, and then add alkaline to the gelatin solution at 50°C Protease was stirred and hydrolyzed for 5 hours to obtain collagen; wherein, the amount of alkaline protease accounted for 1.0% of the gelatin mass;

[0033] 2) Pretreatment of microfiber synthetic leather base cloth:

[0034] Add microfiber synthetic leather base cloth into the drum, and use concentrated sulfuric acid with a mass fraction of 98% to treat the microfiber synthetic leather base cloth for 4.5 hours under the condition of liquid ratio of 3000% and temperature of 45°C to obtain Surface-modified superfine fiber synthetic leather base cloth; wherein, the consumption of concentrated sulfuric acid is 15% of the quality of superfine fiber synthetic leather base cloth;

[003...

Embodiment 2

[0041] 1) Preparation of collagen:

[0042] Add water to the gelatin, stir to swell the gelatin to obtain a gelatin solution with a mass concentration of 40%, use 1mol / L sodium hydroxide solution to adjust the pH of the gelatin solution to 9.5, and then add alkaline to the gelatin solution at 60°C Protease was stirred and hydrolyzed for 4 hours to obtain collagen; wherein, the amount of alkaline protease accounted for 1.5% of the gelatin mass;

[0043] 2) Pretreatment of microfiber synthetic leather base cloth:

[0044] Add microfiber synthetic leather base cloth into the drum, and use analytically pure formic acid to treat microfiber synthetic leather base cloth for 3.5 hours under the conditions of liquid ratio of 6000% and temperature of 55°C to obtain surface-modified Microfiber synthetic leather base cloth; wherein, the amount of formic acid is 12% of the mass of microfiber synthetic leather base cloth;

[0045] 3) Collagen modification of superfine fiber synthetic leat...

Embodiment 3

[0051] 1) Preparation of collagen:

[0052] Add water to the gelatin, stir to swell the gelatin to obtain a gelatin solution with a mass concentration of 30%, use 1mol / L sodium hydroxide solution to adjust the pH of the gelatin solution to 9, and then add alkaline to the gelatin solution at 55°C Protease was stirred and hydrolyzed for 3 hours to obtain collagen; wherein, the amount of alkaline protease accounted for 2% of the gelatin mass;

[0053] 2) Pretreatment of microfiber synthetic leather base cloth:

[0054] Add microfiber synthetic leather base cloth into the drum, and use analytically pure formic acid to treat microfiber synthetic leather base cloth for 2.5 hours under the conditions of liquid ratio of 4000% and temperature of 50°C to obtain surface-modified Microfiber synthetic leather base cloth; wherein, the amount of formic acid is 18% of the mass of microfiber synthetic leather base cloth;

[0055] 3) Collagen modification of superfine fiber synthetic leather ...

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Abstract

The invention relates to a method for improving the dyeing property of superfine fiber synthetic leather base cloth. The method comprises the following steps: adding water into gelatin, stirring to enable the gelatin to expand to obtain a gelatin solution, and adding alkaline protease into the gelatin solution for hydrolysis; adding the superfine fiber synthetic leather base cloth into a rotating drum, and treating the superfine fiber synthetic leather base cloth by acid to obtain surface modified superfine fiber synthetic leather base cloth; adding collagen into the rotating drum, performing graft modification on the collagen with the surface modified superfine fiber synthetic leather base cloth, and reacting to obtain collagen modified superfine fiber synthetic leather base cloth; and adding a dye into the rotating drum to dye the collagen modified superfine fiber synthetic leather base cloth. According to the invention, the superfine fiber synthetic leather base cloth is modified by the collagen, so that the superfine fiber synthetic leather base cloth is covalently modified by the collagen, furthermore, the dyeing performance of the superfine fiber synthetic leather is effectively improved, the dye uptake is up to about 94.21%, and the superfine fiber synthetic leather industry can be favorably developed.

Description

technical field [0001] The invention belongs to the technical field of application of superfine fiber synthetic leather, and in particular relates to a method for improving the dyeing performance of superfine fiber synthetic leather base cloth. Background technique [0002] Superfine fiber synthetic leather is a high-grade synthetic leather similar to natural leather made of polyamide superfine fiber as the matrix layer and polyurethane as the elastomer. The structure of the polyamide superfine fiber is similar to that of natural leather protein collagen fibers. PU moisture-permeable polyurethane resin has high durability and is a new field with great potential and good development prospects. [0003] Polyamide microfibers contain very few 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, when dyeing superfine f...

Claims

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Application Information

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IPC IPC(8): D06M15/15D06M11/55D06M13/188D06P1/39D06P1/38C12P21/06
Inventor 王学川王晓芹强涛涛
Owner SHAANXI UNIV OF SCI & TECH
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