A green and pollution-free cold stacking method for pure cotton spunlace nonwovens

Abstract

The invention discloses a green and pollution-free cold stacking method for pure cotton spunlace non-woven fabrics, belonging to the technical field of bleaching. The method includes: (1) pretreatment: exposing the impurity-removed and carded cotton web to plasma for 1-4 minutes; (2) cold stacking: immediately placing the cotton web treated in step (1) in supercritical The cold stack is carried out in the carbon dioxide fluid. The conditions of the cold stack are: temperature 40-80°C, time 0.5-1.5 hours, fluid pressure 10-15 Mpa; supercritical carbon dioxide fluid contains compound biological enzyme agent, compound biological enzyme agent includes fiber Sulfase, pectinase, protease, lipase, laccase and glucose oxidase; (3) Spunlace: the cotton web treated in step (2) is subjected to spunlace treatment. In this method, plasma is firstly used to pretreat the cotton web, which can reduce the processing time and improve the processing effect of the subsequent cold pile process, and the entire processing time can be reduced to 1 hour. No waste water discharge, green and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of bleaching, and in particular relates to a green and pollution-free cold stacking method for pure cotton spunlace non-woven fabrics. Background technique [0002] At present, the existing production of pure cotton spunlace non-woven fabrics generally adopts two processes: 1. Degreasing raw cotton, absorbent cotton (purchased or off-line degreasing)--opening--carding into web--drawing spunlace--drying Drying--coiling--finishing; 2. Raw cotton--opening and impurity removal--carding into a web--drawing spunlace--wet winding, entering the bleaching equipment for bleaching, unwinding--drying--rolling take -- organize. For example, the patent with the application number CN201710618198.3 discloses a production process of spunlace non-woven fabric for raw cotton cold heap degreasing, which adopts first bleaching and then thorn, high alkali oxygen concentration, and long cold heap time (16-22 hours). For example,...

AI Technical Summary

Problems solved by technology

[0005] In summary, the debleaching treatment of non-woven fabrics or other fabrics, especially non-woven fabrics, usually uses NaOH and H 2 o 2 After the treatment is completed, the fabric is cleaned and dried; the pH of the cold stack liquid is usually greater than 10, and the treatment volume is large and difficult

In addition, the cooling time is longer