Cool-feeling polyester composite filament with both cool feeling and cotton-like hand feeling and preparation method thereof

By using a core-sheath composite structure of polyester composite filaments, a high-shrinkage copolyester core layer and a sheet-like thermally conductive filler sheath layer are combined with a pore-forming agent to form a microporous rough layer, the problem of the cool feeling and cotton-like hand feel of polyester fabrics is solved, and stability and durability are achieved after multiple washes.

CN122235864APending Publication Date: 2026-06-19HANGZHOU XULONG CLOTH MFG CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU XULONG CLOTH MFG CO LTD
Filing Date
2026-03-27
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve a significant cooling sensation in polyester fabrics without substantially sacrificing softness and a cotton-like feel, and the cooling performance is difficult to maintain after multiple washes.

Method used

The polyester composite filament adopts a core-sheath composite structure. The core layer is a high-shrinkage copolyester, and the sheath layer is a functional copolyester containing sheet-like thermally conductive fillers and pore-forming aids. A microporous rough layer is formed by hot water washing or weak alkali treatment, which synergistically constructs thermal conductive pathways and tactile structure.

Benefits of technology

It achieves a significant cooling sensation and cotton-like feel with low filler content, and remains stable after multiple washes, reducing the risk of stiffness and itching, and improving the durability and comfort of the fabric.

โœฆ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a polyester composite filament that combines a cooling sensation with a cotton-like feel, and its preparation method. The composite filament has a core-sheath structure. The core layer is a high-shrinkage copolyester with a boiling water shrinkage rate โ‰ฅ18%; the sheath layer is a functional copolyester containing sheet-like thermally conductive fillers treated with aminosilane or epoxysilane and soluble pore-forming agents. After the fabric is washed in hot water at 60โ€“98โ„ƒ or treated with 1โ€“3 g / L of weak alkali to dissolve the pore-forming agents, a microporous rough layer with an average pore size of 0.2โ€“5 ฮผm, a porosity of 3โ€“12%, and an Ra of 0.4โ€“2.0 ฮผm is formed in the sheath layer, simultaneously achieving a cooling sensation and a cotton-like feel. This invention is suitable for cooling fabrics used in summer underwear, sports knitwear, and bedding.
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Citation Information

Patent Citations

  • Cool-feeling master batch as well as preparation method and application thereof

    CN119505486A