Polyester alkali decrement and one-bath-dyeing one-step low-temperature processing method

Abstract

The invention discloses a polyester alkali decrement and one-bath-dyeing one-step low-temperature processing method. The method comprises the steps: carrying out alkali decrement and one-bath-dyeing one-step processing on polyester by using a dipping process, and dissolving sodium hydroxide, a cation accelerant, a carrier, a dispersing agent and a disperse dye into a dye liquid, wherein the dye liquid is prepared from water, the concentration of the carrier is 4-15g/L, the concentration of the sodium hydroxide is 2-4g/L, and the concentration of the cation accelerant is 1*10<-5> to 10*10<-5>mol/L; placing a polyester fabric into the dye liquid according to the bath ratio of 1: (10-100); then, heating to 90-100 DEG C at the speed of 0.5-2 DEG C/min, preserving the heat for 20-100min; taking out the polyester fabric after the heat preservation is ended, washing the polyester fabric 2-5 times by using tap water, and then, carrying out reduction clearing at the temperature of 70-80 DEG C and the bath ratio of 1:50 for 10min by using 2g/L sodium hydroxide and 2g/L sodium hydrosulfite; next, taking out the fabric, and washing 2-6 times by using water; and finally, drying the fabric at the temperature of 70-80 DEG C. By using the method, the polyester alkali decrement and dyeing processing flow is shortened, the alkali decrement processing temperature is reduced, the consumptions of the sodium hydroxide and the cation accelerant are reduced, the production efficiency is increased, the energy sources are saved, the process is simple, no special requirement for the polyester fabric and equipment are needed, and the large-scale production can be realized by using conventional equipment, so that the method has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of dyeing and finishing, and relates to a one-bath, one-step low-temperature processing for alkali weight reduction and dyeing of polyester by adding a carrier for dyeing polyester disperse dyes into a treatment solution. Background technique [0002] Polyester is the synthetic fiber with the largest output in the world. It has good dyeing performance, high strength, quick drying, and is not easy to wrinkle. It is suitable for manufacturing various clothing fabrics. In order to increase the added value of polyester fabrics, people have developed an alkali weight reduction process to produce imitation silk polyester. At present, the alkali weight reduction and dyeing of polyester usually adopt a two-step process, and the products produced have excellent performance; however, the disadvantages of the two-step process are that the process is relatively long and consumes a lot of energy. In 2012, Wang Chao publ...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the polyester alkali weight reduction and dyeing process need to be carried out in two steps, and it needs to be carried out under the conditions of higher temperature and higher chemical consumption, and there are complex processes, large energy and chemical consumption, and Disadvantages that are not conducive to energy saving, emissi...

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