Nylon four-way stretch fabric and its preparation process

By using modified nylon multifilament and spandex filament structure in nylon four-way stretch fabric, combined with two-bath two-roll penetration finishing and step-by-step heat treatment, a gradient functional film layer is formed, which solves the contradiction between high-efficiency UV protection and durability in lightweight elastic fabric, and achieves excellent sun protection performance, breathability and hand feel.

CN122406445APending Publication Date: 2026-07-17PATHFINDER (ZHEJIANG) SPORTS TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PATHFINDER (ZHEJIANG) SPORTS TECHNOLOGY CO LTD
Filing Date
2026-04-16
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve efficient UV protection without increasing fabric thickness when preparing lightweight elastic fabrics. Furthermore, the bonding strength of UV shielding agents is limited, which makes functional substances easy to fall off, affecting the breathability and feel of the fabric, and reducing its elasticity recovery ability after long-term use.

Method used

An elastic base fabric with modified nylon multifilament as sheath and spandex filament as core is used. Through a two-bath two-roll penetration finishing process, nano-titanium dioxide precursor and polyurethane prepolymer are penetrated into the fiber interior. A gradient functional film layer is formed through stepwise heat treatment. Combined with sheet-like nano-zinc oxide and organic ultraviolet absorber, deep anchoring and chemical cross-linking are achieved.

Benefits of technology

Without increasing fabric thickness, it provides excellent UV protection and washability, maintains good breathability and a lightweight, highly elastic feel, while improving fabric durability and sun protection.

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Abstract

The application discloses a nylon four-way stretch fabric and a preparation process thereof, and relates to the technical field of textiles.The technical scheme points of the application are as follows: first, an elastic base fabric is provided, which is composed of a modified nylon multifilament as a sheath and spandex as a core, and a compound master batch containing flaky nano zinc oxide is melt-blended in the sheath; then, two-bath two-rolling penetration finishing is adopted, physical channels are formed in the amorphous region of the fiber by using a nylon fiber swelling agent to activate the fiber, and then a reactive finishing liquid containing polyurethane prepolymer and nano titanium dioxide precursor is immersed and rolled; finally, step-by-step heat treatment is performed, nano particles are generated by in-situ hydrolysis of the precursor at low temperature, and cross-linking and solidification are induced at high temperature.The application realizes deep anchoring and nanoscale uniform dispersion of functional components through the synergistic effect of endogenous physical shielding and in-situ generation of gradient film layers, solves the contradiction between high sun protection index and light and thin high-elasticity hand feeling, and endows the fabric with excellent ultraviolet protection performance, washing resistance, air permeability, cool feeling and antistatic performance.
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