Process for the production of polyester fibers for automotive interior carpets by drawing

By forming a chemical cross-linking network in polyester fibers, the problems of static electricity, flammability, and mechanical strength of polyester fibers in automotive interior carpets are solved, achieving improved high-efficiency flame retardancy, antistatic properties, and long-term compression performance, while maintaining good stability of functional components.

CN122279790APending Publication Date: 2026-06-26SHAANXI DINGCHUAN TEXTILE NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI DINGCHUAN TEXTILE NEW MATERIAL TECH CO LTD
Filing Date
2026-05-27
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Traditional polyethylene terephthalate (PET) fibers have several drawbacks in automotive interior carpet applications, including static electricity generation, flammability, safety hazards, reduced mechanical strength, and poor long-term compression performance. Furthermore, the physically added small-molecule additives are prone to volatilization and loss, resulting in short-lasting functionality.

Method used

A hydroxyl-terminated hyperbranched multifunctional polysiloxane crosslinking modifier is melt-blended with polyester chips at high temperature. Through low-temperature orientation stretching and high-temperature reactive stretching, a chemical crosslinking network is formed, anchoring flame-retardant and antistatic components in the polyester macromolecular network.

Benefits of technology

The limiting oxygen index is increased to over 32%, the surface resistivity is reduced to 107-108Ξ©, the carpet compression resilience is increased to over 92%, the fiber breaking strength is increased by 12-15%, the functional components are chemically bonded, the volatility is low, and the performance is stable.

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Abstract

This invention relates to the field of textile manufacturing technology, specifically to a method for preparing polyester fibers for automotive interior carpets by stretching. The method includes steps such as crosslinking modifier preparation, modified spinning melt formulation, low-temperature orientation stretching, high-temperature reactive stretching, and relaxation heat setting. The method combines polyester chips with a terminal hydroxyl hyperbranched multifunctional polysiloxane crosslinking modifier to covalently anchor flame-retardant and antistatic segments within the polyester macromolecular network. The key technology of this invention lies in the activation of titanium acetylacetonate during the high-temperature stretching stage, which promotes an ester exchange crosslinking reaction between the terminal hydroxyl groups of the modifier and the ester bonds of the polyester molecular chains, constructing chemical crosslinking points in situ under the stretched orientation state. This invention overcomes the defects of traditional physical blending agents, such as stress concentration, high breakage rate, and easy loss of function. By utilizing the orientation-crosslinking structure, it effectively prevents molecular chain slippage under pressure, effectively improving the irreversible deformation problem of carpets under long-term cyclic compression loads, and ensuring the fiber's durable high compression resilience, flame retardant, and antistatic properties.
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