Novel dyeing process of polyester/cotton knitted fabric

Abstract

The invention relates to a novel dyeing process of a polyester / cotton knitted fabric. The process is characterized by comprising the following steps: pre-treatment / washing in a single bath; pickling and neutralizing; deoxygenating; cotton dyeing; water washing; acid passing; TCW cleaning; hot washing; water washing; and color fixing. Compared with a conventional process, a single bath agent Yakesai TCB-N is adopted to combine pre-treatment and dyeing, so that the oxygen bleaching and dyeing in the single bath can be realized technically; after washing, no cleaning is performed, and meanwhile, the hot washing numbers of time and two times of reductive cleaning are reduced, and cotton dyeing is directly performed, so that the process is shortened; after cotton dyeing, a TCW environmental cleaning process is adopted to replace a conventional two-time soaping step at 95 DEG C, and meanwhile, the hot washing numbers of time is reduced, so that the process is relatively environment-friendly, COD is low, the sewage treatment burden is alleviated, the benefit is increased, the pollution discharge is reduced, and an effect of saving energy and reducing emission is achieved.

Description

technical field [0001] The invention relates to a dyeing process, in particular to a new dyeing process of polyester-cotton knitted fabrics. Background technique [0002] Textile dyeing and finishing is a traditional industry in my country and an important part of the textile industry. The level of dyeing and finishing industry largely represents the level of a country's textile industry. Its development plays a very important role. As we all know, textile embryos The cloth is based on the cottonseed, ash, impurities, oil, etc. in its own fiber and the oil stains generated during the spinning process. Before the subsequent dyeing process, the oil, impurities, etc. must be removed. This is the pre-treatment process. After degradation, After treatment by physical and chemical methods such as emulsification or dissolution, the fabric surface is smooth, the dyeing rate is improved, the level dyeing property is enhanced, and the dyeing defective rate is reduced; Hair, floating colo...

AI Technical Summary

Problems solved by technology

[0003] The traditional processing method is generally pre-treatment with oxygen bleaching, and then disperse / active two-bath two-step dyeing, that is, dyeing polyester under weak acidic conditions; Disperse dyes on the components; then neutralize with acetic acid, and then dye the cotton components with reactive dyes; finally wash with water and use soaping agent for high-temperature soaping after treatment. This process is complicated, time-consuming, water-consuming, and energy-consuming. Production The cost is also high, and a large amount of waste water is discharged, and the energy consumption of water, steam, and electricity in the traditional pretreatment and post-dyeing treatment processes is the main part of energy and cost, especially water consumption and a large amount of discharge have always been The ways and problems that enterprises seek to solve

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