Method for producing high-wet-modulus regenerated cellulose fibers from bamboo pulp

Abstract

The invention discloses a method for producing high-wet-modulus regenerated cellulose fibers from bamboo pulp. The method comprises a gum making step and a spinning step, and specifically comprises the following steps: with the bamboo pulp having the alpha cellulose content of greater than or equal to 90% and a degree of polymerization in the range from 400 to 500DP as a raw material, subjecting the bamboo pulp to alkali steeping, and adding BerolVisco388 which is produced by Akzo Nobel Company of Sweden and accounts for 0.1-0.2% of the weight of the alpha cellulose in the bamboo pulp in the alkali steeping step to obtain an alkali cellulose; subjecting the alkali cellulose to crushing, squeezing, aging, yellowing, dissolving, filtering, defoaming and ripening to form a spinning solution for spinning; reacting the spinning solution with a spinning bath to obtain primary filaments; and then subjecting the primary filaments to negative drafting, cutting, after treatment and drying processes to obtain finished product fibers. The method provided by the invention realizes the production of the high-wet-modulus regenerated cellulose fibers from the bamboo pulp with low polymerization degree and low alpha cellulose. Besides, the high-wet-modulus regenerated cellulose fibers are greatly improved in wet-and-dry strength and wet modulus, and meets the definition requirements of modal fibers in BISFA (Bureau International pour la Standardisation des Fibres Artificielles) standards.

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