Polyurethane elastic fibers and their production methods

By using a spinning method with polyurethane A and additive B, the problem of unstable properties of polyurethane elastic fibers was solved, resulting in fibers with high recovery stress and low permanent deformation, suitable for fabric processing with stable fabric properties.

CN116635578BActive Publication Date: 2026-05-26东丽奥培隆特士股份有限公司
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Patent Information

Application Number
CN202180085995.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-10-23
Filing Date
2021-10-22
Publication Date
2026-05-26
Estimated Expiration
2041-10-22

AI Technical Summary

Technical Problem

When using common raw materials, existing polyurethane elastic fibers suffer from unstable fiber properties that change significantly over time, making it difficult to control inventory and processing, and making it difficult to obtain fabrics with stable properties and quality.

Method used

A spinning method comprising polyurethane A and additive B is adopted. Polyurethane A is composed of polymeric diol, diisocyanate and chain extender, and additive B is polyurethane or polyurea ionically bonded with diol and/or diamine and sulfonic acid compound. Stable polyurethane elastic fibers are formed by mixing the spinning solution.

Benefits of technology

It achieves high recovery stress and low permanent deformation of polyurethane elastic fibers, is easy to process and use, and has stable fiber properties over time, making it suitable for advanced weaving and braiding.

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Abstract

[Problem] The object of the present invention is to provide polyurethane elastic fibers with excellent fabric properties and stability of fabric properties over time, achieved by including a specific polyurethane in the polyurethane elastic fibers, the specific polyurethane having a salt structure in its molecular structure in which specific functional groups are ionicly bonded to each other; and to provide a method for producing such polyurethane elastic fibers. Another object of the present invention is to provide a polyurethane elastic fiber that allows for easier fiber inventory control and processing condition management during use, and can be used to obtain fabrics with stable fabric properties and fabric quality; and to provide a method for producing such polyurethane elastic fibers. [Solution] A polyurethane elastic fiber comprising polyurethane A and additive B. Polyurethane A: A polyurethane using a polymeric diol, diisocyanate, and chain extender as starting materials and not containing a tertiary amine in the backbone. Additive B: A polyurethane or polyurea using a diol and / or diamine and diisocyanate as starting materials and having a tertiary amine nitrogen bonded only to non-aromatic carbons in the backbone, the tertiary amine nitrogen being ionicly bonded to a sulfonic acid compound to form a sulfonic acid amine.
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