Process for the preparation of crosslinked cellulose fibers

Through the step-by-step curing process and gradient acid-base solution washing on Lyocell fibers, the problems of pilling and uneven dyeing of Lyocell fiber fabrics are solved, the cross-linking uniformity and stability are improved, and the energy consumption is reduced. It is suitable for the preparation of cross-linked cellulose fibers.

CN119433974BActive Publication Date: 2025-10-17CHINESE TEXTILE ACAD
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Patent Information

Application Number
CN202310948986.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-31
Publication Date
2025-10-17
Estimated Expiration
2043-07-31

AI Technical Summary

Technical Problem

Existing Lyocell fiber fabrics are prone to problems such as pilling, uneven dyeing, inconsistent frosted appearance of the fabric, yarn hairiness and breakage during use, and the cross-linking bonds are unstable under certain environments.

Method used

A step-by-step curing process is adopted to perform preliminary curing and deep curing by adding crosslinker and catalyst solution to Lyocell fiber. Gradient acid-base solution is used to change the electron cloud density distribution, and the temperature and pH value are controlled to ensure uniform distribution and complete reaction of the crosslinker.

Benefits of technology

It improves the uniformity of cross-linking limit and product quality, reduces energy consumption, prolongs the stability of fiber, solves the durability problem of fabric, achieves significant improvement in resistance to fibrillation, has the advantages of low production energy consumption, small footprint, high production efficiency and cross-linking effect, low production energy consumption and small footprint.

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Abstract

The application discloses a preparation method of cross-linked cellulose fiber and belongs to the technical field of cellulose preparation. The method comprises the following steps: adding a cross-linking agent solution and a catalyst solution to Lyocell fiber, and preliminarily solidifying at a first set temperature to obtain preliminarily solidified Lyocell fiber, wherein the mass percentage of the cross-linking agent solute in the cross-linking agent solution is 0.1% to 10%, defined as a; the mass percentage of the catalyst solute in the catalyst solution is (0-5%)x a; the solidified Lyocell fiber is washed at a second set temperature to change the electron cloud density distribution of the solidified Lyocell fiber, deep solidification is completed, and deep solidified Lyocell fiber is obtained; and the deep solidified Lyocell fiber is subjected to post-treatment to obtain cross-linked cellulose fiber. The method can improve the uniformity of cross-linking and the product quality.
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