Production technology for indigo cotton yarn

Abstract

The invention discloses a production technology for indigo cotton yarn. The production technology comprises the steps of blowing, carding, first drawing, second drawing, third drawing, roving, spinning and post processing, and specifically comprises the steps that firstly, indigo dye coating is molten to be prepared into a leuco body for use; secondly, preprocessed cotton is put into the indigo dye coating, the temperature is increased to 35 DEG C at a speed of 3 DEG C / min, temperature keeping is conducted for 30 min, the temperature is increased to 120 DEG C at a speed of 2 DEG C / min, dyeing continues to be conducted for 20 min, the temperature is decreased to 40 DEG C at a speed of 3 DEG C / min, and the cotton is taken out; thirdly, blowing, carding, first drawing, second drawing, third drawing, roving and spinning are conducted on the dyed cotton so that the cotton can be spun into cotton yarn for use; fourthly, post processing is conducted on the dyed cotton yarn, and post processing comprises drafty oxidation for 5 min, soaping and stoving, soap washing liquor is formed by adopting anhydrous sodium carbonate of 2 g / L and standard soap flakes of 5 g / L, the temperature is 60 DEG C, time is 20 min, and soap boiling, washing and stoving are conducted on the oxidized fabric.

Description

technical field [0001] The invention belongs to the field of textile printing and dyeing processing, in particular to a production process of indigo cotton yarn. Background technique [0002] The traditional printing and dyeing technology adopts the process of spinning first and then coloring. This process method is that the color of the yarn is uneven, there are white spots, and there are often problems such as fading, staining, and poor color fastness of neps, which increases the return of yarn. Many repeated processes make the layers of the cloth surface unclear and the color unnatural. Contents of the invention [0003] The invention provides a production process of indigo cotton yarn, which adopts the process of dyeing first and then spinning, so that the dyed yarn can be uniform in color, not white, and resistant to bleaching and washing. [0004] The detailed technical scheme that the present invention adopts is: [0005] A kind of production technology of indigo ...

AI Technical Summary

Problems solved by technology

[0002] The traditional printing and dyeing technology adopts the process of spinning first and then coloring. This process method is that the color of the yarn is uneven, there are white spots, and there are often problems such as fading, staining, and poor color fastness of neps, which increases the return of yarn. The shortcomings of multiple repeated processes, making the layers of the cloth surface unclear and the color unnatural