A method for preparing non-woven fabrics through multi-effect composite bleaching

Abstract

The invention discloses a method for preparing non-woven fabrics through multi-effect composite bleaching, which belongs to the technical field of bleaching. The method includes: (1) opening and carding to form a web: the cotton fibers are opened, carded and formed into a web to obtain a cotton web; (2) debleaching before spunlace: the cotton web treated in step (1) is placed in an ultra-thin Cold stacking is carried out in the critical carbon dioxide fluid, and the supercritical carbon dioxide fluid contains a composite biological enzyme agent, which includes cellulase, pectinase, protease and lipase; (3) spunlace: process step (2) After the cotton web is hydroentangled; (4) debleaching after the hydroentanglement: the cotton web after the step (1) is dissolved in the chemical cold stacking agent dissolved in ozone to carry out normal temperature cold stacking, and the processing time is 20-45 minutes; The chemical cold pile agent includes hydrogen peroxide and sodium hydroxide, and the concentration of ozone in water is 1-8mg / L; (5) washing and drying: the cotton net treated in step (4) is washed and dried to obtain the product.

Description

technical field [0001] The invention belongs to the technical field of bleaching, in particular to a method for preparing non-woven fabrics through multi-effect composite bleaching. Background technique [0002] At present, the combination of cold pile technology and spunlace can not only degrease and bleach cotton to achieve the purpose of energy saving and emission reduction, but also further reduce the energy consumption of the entire cotton spunlace production line. Therefore, the cold pile technology is very suitable for the spunlace process. 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 example, the patent application number CN201710046631.0 discloses a production process of pure cotton spunlace non-woven fabrics by cold stacking m...

AI Technical Summary

Problems solved by technology

However, supercritical carbon dioxide fluid is mainly used in the desizing or dyeing process of textiles, and has not been reported in the debleaching process.