Novel polyester-cotton disperse dye and reactive dye two-bath dyeing process

Abstract

The invention discloses a novel polyester-cotton disperse dye and reactive dye two-bath dyeing process. The method comprises the following steps: S1, dyeing and washing: immersing the polyester cottonfabric into a disperse dye microcapsule dyeing solution, heating the material to 120-130 DEG C, performing insulation for 45 to 55 minutes, cooling the material to 70 to 80 DEG C, performing insulation for 5 to 15 minutes, washing the material with water, and drying the material; and S2, cotton dyeing: immersing the polyester cotton fabric into a finishing solution containing 2,3-epoxypropyltrimethyl ammonium chloride, heating the material to 70-80 DEG C, performing insulation for 50-60 min, and then immersing the material in a reactive dye solution, heating the material to 70-80 DEG C, performing insulation for 10-20min, then adding 5-20g / L of soda ash, performing insulation for 25-35min, and after cooling to room temperature, performing steps of washing, soaping and drying. The noveltwo-bath dyeing process not only has high production efficiency, short process flow, but also uniform coloring and high color fastness.

Description

technical field [0001] The invention relates to the technical field of dyeing, in particular to a novel two-bath dyeing process of polyester-cotton disperse dyes and reactive dyes. Background technique [0002] The traditional printing and dyeing industry has always adopted the two-bath two-step dyeing method of disperse / reactive dyes for dyeing polyester-cotton blended or interwoven fabrics, that is, dyeing polyester with disperse dyes-reduction cleaning-reactive dyes for over-dyeing cotton. The entire dyeing process takes 10 For many hours, the production efficiency is low, the consumption of water, electricity and steam is large, and the amount of sewage discharge is large. Moreover, due to the long wet processing time, it is easy to make the cloth surface fuzzy and affect the fabric feel, which reduces the product quality and economic benefits of the enterprise. [0003] The existing disperse / reactive dye one-bath dyeing method replaces the disperse / reactive dye two-bath...

AI Technical Summary

Problems solved by technology

[0002] The traditional printing and dyeing industry has always adopted the two-bath two-step dyeing method of disperse / reactive dyes for dyeing polyester-cotton blended or interwoven fabrics, that is, dyeing polyester with disperse dyes-reduction cleaning-reactive dyes for over-dyeing cotton. The entire dyeing process takes 10 For several hours, the production efficiency is low, the consumption of water, electricity and steam is large, and the discharge of sewage is large. Moreover, due to the long wet processing time, it is easy to make the cloth surface fluffy and affect the fabric feel, which reduces the product quality and economic benefits of the enterprise.

[0003] The existing disperse / reactive dye one-bath dyeing method replaces the disperse / reactive dye two-bath two-step dyeing method. Although the problems of the two-bath dyeing method can be avoided to a certain extent, there are still many problems in the disperse / reactive dye one-bath dyeing method. Problems, such as the limitations of reactive dyes and disperse dyes used are very large, both reactive dyes and disperse dyes require certain specific dyeing performance requirements, do not have a wide range of use values, and usually cause dye hydrolysis and uneven coloring , resulting in defects such as color flower, color difference, low color fixation rate, etc.

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