A kind of preparation method of absorbent cotton

Abstract

The invention discloses a method for preparing degreased cotton. The method includes the following steps of 1, cotton opening; 2, immunity removing; 3, cotton carding; 4, degreasing, wherein linter obtained after cotton carding is placed into a boiling-off pot, a NaOH solution with the concentration of 22-28 g / L and the temperature of 70 DEG C is added to permeate into the linter obtained after cotton carding, then the temperature is increased to 95 DEG C or above for convection, the mixture is boiled off for 7-8 h from the convection time, the boiling-off temperature is kept being 95-100 DEG C in the boiling-off process, the alkaline solution is recycled after the boiling-off process is completed, and the obtained product is washed with hot water and cold water and dried; 5, bleaching; 6, pickling; 7, washing; 8, drying. The indexes including the pH value, readily-oxidizable substances and biocompatibility of the prepared degreased cotton meet the medical requirements, the whiteness can be 85 degrees or above, the size of surface active substances is not larger than 2 mm, and the amount of water absorbed by 10 g of degreased cotton in 20 s can be 23 g or above.

Description

technical field [0001] The invention belongs to the technical field of absorbent cotton production, and in particular relates to a preparation method of absorbent cotton. Background technique [0002] The main component of cotton fiber is α-cellulose, which is generally called cotton with high maturity and long fiber, that is, about 40% of the outer part of the cotton boll is cotton; The relatively short and relatively poor quality is called cotton linters, that is, the remaining 60% are cottonseeds, which are covered with a layer of short-staple cotton, and the cottonseeds are mechanically stripped to obtain cotton seeds and short-staple cotton. About 20% of the total. They are collectively referred to as cotton fibers, the former is mostly used in the textile industry, and the latter is often used in the chemical industry. However, short-staple cotton contains more broken cottonseed husks, broken cotton leaves, broken cotton peach shells, dust, etc., and cannot be direct...

AI Technical Summary

Problems solved by technology

[0003] The absorbent cotton prepared by the traditional method has a long time of water absorption and a small amount of water absorption, which no longer meets the needs of modern people. In addition, the biocompatibility is not good, especially the needs of medical procedures.