Polyamide industrial yarn with improved thermo-mechanical properties

EP4750832A1Pending Publication Date: 2026-06-03INVISTA TEXTILES (U K) LTD
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
INVISTA TEXTILES (U K) LTD
Filing Date
2024-07-02
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Current polyamide 6,6 (PA66) yarns lack improved thermo-mechanical properties, making them unsuitable for harsh industrial applications where stress and elevated temperatures are involved.

Method used

A polyamide yarn with a formic acid relative viscosity (RV) of about 90 to 200 and a molecular weight distribution (Mz/Mw) characterized by a ratio of 1.40 to 1.50 ±0.03, which enhances the yarn's elongation at maximum force and melt-through resistance.

Benefits of technology

The improved thermo-mechanical properties of the yarn result in increased mechanical strength, enhanced resistance to heat, and improved processing efficiency, making it suitable for more demanding industrial applications.

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Abstract

A high tenacity drawn polyamide (preferably PA66) yarn finding utility as an industrial thread and having a formic acid relative viscosity (RV) of about 90 to about 200, a molecular weight distribution characterized by Mz / Mw in the range of 1.40 to 1.50 ±0.03 and an elongation at maximum force is greater than 15.0% of its original dimension.
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