Short-flow pre-treatment process for pure cotton woven fabric

Abstract

The invention provides a short-flow pre-treatment process for a pure cotton woven fabric, which belongs to the technology of printing and dyeing pre-treatment of textiles. The short-flow pre-treatment process provided in the invention simplifies the conventional three-step method of desizing, scouring and bleaching into a two-step method, wherein the first step is cold pad batching and the second step is high temperature steaming; the procedures of scouring and bleaching in a conventional processing method for a pure cotton woven fabric are integrated in the short-flow pre-treatment process, no caustic soda is used in the process, and flow of the process comprises singeing, desizing (rolling a gray fabric and stacking the fabric at room temperature), open washing (with 7 open-washing boxes), scouring and bleaching (100 DEG C, 40 to 60 min), open washing (with 5 open-washing boxes) and drying. The invention provides a formula for desizing slurry and a formula for scouring and bleaching liquid to cooperate with the flow; the formula for the desizing slurry comprises 15 to 30 g/l of caustic soda (100%), 3 to 6 g/l of a penetrating agent and 2 to 5 g/l of a scouring agent; the formula for the scouring and bleaching liquid comprises 4 to 10 g/l of hydrogen peroxide (35%), 20 to 30 g/l of solid scouring enzyme, 5 to 8 g/l of water glass 40 degrees Be, 2 to 3 g/l of a scouring agent and 2 to 4 g/l of a complexing agent, and the pH value of the scouring and bleaching liquid is 10.5.

Description

technical field [0001] The invention belongs to the field of textile printing and dyeing pretreatment processing. Background technique [0002] The traditional pretreatment process of woven fabrics: seven major processes of turning, seaming, singeing, desizing, scouring, bleaching, and mercerizing, among which unwinding, boiling, and bleaching play a very important role in post-processing. The traditional pre-treatment of pure cotton woven fabrics usually goes through three high-temperature steaming processes. In the past ten years, one cold pile and two high-temperature steaming processes have been adopted. The energy consumption of the entire printing and dyeing enterprise production process is the largest. In these traditional processes, caustic soda is the main agent, caustic soda can make the pulp puff and wash away when desizing; it can saponify the grease and wax in cotton fiber to form soluble substances and remove it when scouring; Hydrogen peroxide is used to adj...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the traditional process is long, requires a lot of investment equipment, consumes a lot of energy, and needs to use a large amount of caustic soda, which will generate a large amount of alkaline wastewater. Considering the current situation of domestic textile mills with complex sizing components and high sizing rates , the present invention provides a short process for the pretreatment of pure cotton woven fabrics, which shortens the traditional three-step high-temperature steaming process of retreating, boiling and bleaching to a two-step process: the first step of cold rolling Heaping, the second step is high-temperature steaming, which combines the scouring and bleaching of traditional pure cotton woven fabrics into one. This process does not require caustic soda. At the same time, in order to cooperate with the short flow process of the present invention, we scouring several commercially available liquids Enzymes, solid scouring enzymes and amylases were screened and small sample application comparative tests were carried out to screen out enzyme products that can act on most of the impurities to be removed in the pretreatment of pure cotton woven fabrics-slurry and various pectates. Coupled with pretreatment additives with strong emulsification, dispersion, extraction and other capabilities

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