Method for producing regenerated cellulose fiber with high wet modulus from bamboo pulp

Abstract

A method for producing regenerated cellulose fibers with high wet modulus from bamboo pulp, comprising a rubber-making process and a spinning process, using bamboo pulp with a methyl fiber content ≥ 90% and a polymerization degree of 400-500DP as raw materials, and making the bamboo pulp The meal is impregnated with alkali, and Berol produced by AkzoNobel, Sweden is added in the alkali impregnation process. Visco? 388, the addition amount is 0.1-0.2% of the weight of the first fiber in the bamboo pulp to obtain the alkali cellulose; the alkali cellulose is crushed, pressed, aged, yellowed, dissolved, filtered, defoamed, matured, and made into a spinning The raw silk solution is used for spinning; the raw spinning solution reacts with the spinning bath to obtain primary filaments, and the primary filaments undergo negative drafting, cutting, post-processing, and drying processes to obtain finished fibers. The invention realizes the production of high wet modulus regenerated cellulose fiber from pulp with low polymerization degree and low methyl cellulose. The dry and wet strength and wet modulus of the regenerated cellulose fiber are greatly improved, meeting the definition requirements of the modal fiber in the BISFA standard.

Description

technical field [0001] The invention relates to a production process for producing regenerated cellulose fibers with high wet modulus from bamboo pulp, and belongs to the industrial field of production methods of textile raw materials. Background technique [0002] Ordinary bamboo pulp viscose staple fiber is a regenerated cellulose fiber made from pulp made from cellulose extracted from natural bamboo. Compared with ordinary cotton and wood pulp viscose staple fiber, it not only has the advantages of good wearing performance, good moisture absorption and air permeability, and bright dyeing, but also has a smoother hand feel and higher antibacterial property, so it is more suitable for use in underwear, Applications in towels, home textiles and other fields. However, bamboo pulp viscose staple fiber has some serious disadvantages, such as poor spinning formation, high defects, low dry and wet strength, especially the severe swelling of the fiber in wet state, low wet streng...

AI Technical Summary

Problems solved by technology

Due to the influence of raw material quality, bamboo pulp has low degree of polymerization (400-500DP) and low methyl fiber content (90%-93%), so theoretically it cannot be used to produce high wet modulus regenerated cellulose fiber