Method for environment-friendly low-temperature scouring and bleaching in spinning dyeing and finishing

Abstract

The invention relates to a method of environment-protective low-temperature scouring and bleaching used for textile dyeing and finishing, comprising the following steps: a dyeing and finishing solution which consists of low-temperature scouring and bleaching promoter composition, 25-30% of hydrogen peroxide and caustic soda, with the mass percentage of 2:8-12:2.5-3 is prepared; subsequently, the dyeing and finishing solution is used for processing cotton knitted fabric with the bath proportion of 1:8-15, the temperature of 75-80 DEG C and the time of 40-60s. The method carries out scouring and bleaching one bath processing at the temperature of 75-80 DEG C, with the scouring and bleaching effect achieving the whiteness and capillary effect standard of the traditional high-temperature alkali-oxygen one bath process at the temperature of 98-100 DEG C or even 130 DEG C; furthermore, the cost is low, the processing time is saved, and the possibility of wrinkle of cotton and cotton blended fabric (such as blended polyurethane and cotton) is reduced.

Description

technical field [0001] The invention belongs to the field of environment-friendly low-temperature scouring and bleaching, in particular to an environment-friendly low-temperature scouring and bleaching method for textile dyeing and finishing. Background technique [0002] Textile dyeing and finishing has always been a high-emission, high-pollution, high-energy-consuming industry. Its water and energy consumption is prominent, environmental pollution is high, and environmental governance costs are high. It has become a bottleneck restricting the sustainable development of the textile dyeing and finishing industry. The "Three E" system with efficiency, economy and environment as the core is the main theme of global industrial development in the 21st century. my country's "Eleventh Five-Year" development plan has clearly proposed three rigid assessment indicators for the development of textile industry technology: during the Eleventh Five-Year Plan period, reduce pollution emis...

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Problems solved by technology

[0011] Low-temperature bleaching and bleaching of cotton knitted fabrics by chemical method, mixed use of hydrogen peroxide activator, hydrogen peroxide, alkali, and surfactant, at 70-80°C for bleaching-bath pretreatment to achieve better whiteness and capillary effect , but did not specify the specific composition and ratio of the activator; sodium pyrophosphate, sodium hexametaphosphate, sodium silicate and hydrogen peroxide are also used for low-temperature bleaching, and then a high-temperature emulsification process with an emulsifier to remove grease and wax can achieve the desired effect , but this process has not realized one bath of boiling and bleaching; there are also low-temperature boiling and bleaching with perchlorethylene, pine oil, surfactant, caustic soda, hydrogen peroxide and sodium silicate, but because of the environmental protection problems of organic halogen (AOX) in perchlorethylene , and the dosage cost is too high to promote

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