Green and pollution-free cold batch method for pure cotton spunlace non-woven fabric

Abstract

The invention discloses a green and pollution-free cold batch method for pure cotton spunlace non-woven fabric, and belongs to the technical field of bleaching. The method comprises the following steps of (1) pretreatment: exposing a cotton web subjected to impurity removal and carding in plasma, wherein the treatment time is 1-4 minutes; (2) cold batch treatment: immediately performing cold batch treatment on the cotton web treated in the step (1) in a supercritical carbon dioxide fluid under the conditions that the temperature is 40-80 DEG C, the time is 0.5-1.5 hours and the fluid pressure is 10-15 Mpa, wherein the supercritical carbon dioxide fluid contains a composite biological enzyme agent, and the composite biological enzyme agent comprises cellulase, pectinase, proteinase, lipase, laccase and glucose oxidase; (3) spunlace: performing spunlace treatment on the cotton web treated in the step (2). According to the method, the cotton web is pretreated through the plasma, the treatment time of the subsequent cold batch process can be shortened, the treatment effect can be improved, and the whole treatment time can be shortened to one hour. No wastewater is discharged, and the method is green and environment-friendly.

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. Raw cotton degreasing, degreasing cotton (purchased or off-line degreasing)-opening-combing into a web-drawing spunlace-drying Drying--coiling--finishing; 2. Raw cotton--opening and removing impurities--carding into a net--drawing spunlace--wet winding, entering the de-bleaching equipment for bleaching, unwinding--drying--rolling Take - organize. For example, the patent application number CN201710618198.3 discloses a spunlace non-woven fabric production process for cold stack degreasing of raw cotton, which adopts bleaching first and then stabbing, high alkali oxygen concentration, and long cold stacking time (16-22 hours). For examp...

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