A thin film flame-retardant PET material and a preparation method thereof

By constructing a grafting reaction between the core-shell structured flame retardant PDA@ADP and conjugated microporous polymer hollow nanospheres and PET, combined with a three-layer co-extrusion biaxial stretching process, the problems of poor compatibility and migration of flame retardants in PET materials were solved, achieving high-efficiency flame retardancy and improved stability.

CN121697307BActive Publication Date: 2026-07-24GUANGZHOU YINYUAN NEM MATENIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGZHOU YINYUAN NEM MATENIAL TECH CO LTD
Filing Date
2025-11-28
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing flame-retardant modification methods for PET materials suffer from poor compatibility between flame retardants and the matrix, decreased mechanical properties, and flame retardant migration, making it difficult to achieve efficient flame retardancy and stability while maintaining process simplicity.

Method used

By constructing a core-shell structured flame retardant PDA@ADP and a grafting reaction of conjugated microporous polymer hollow nanospheres with PET, combined with a three-layer co-extrusion biaxial stretching process, the interfacial bonding between the flame retardant components and the PET matrix is ​​optimized, forming a dense carbon layer and a synergistic effect of gas-phase flame retardancy.

Benefits of technology

It significantly improves flame retardant and mechanical properties, reduces flame retardant migration, and achieves improved flame retardant efficiency and material stability.

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Abstract

The application belongs to the technical field of high polymer materials, and particularly relates to a thin film flame-retardant PET material and a preparation method thereof; aiming at the problems of poor compatibility, mechanical property reduction and flame retardant migration possibly existing in current physical blending; the application adopts a three-layer co-extrusion structure, including two surface layers with high PET content and a core layer containing flame-retardant components; the core layer is added with core-shell structure flame-retardant PDA@ADP and modified hollow nanospheres of conjugated microporous polymer, so as to realize firm combination of the flame-retardant components and the PET matrix on a molecular scale, and the flame-retardant PET thin film is prepared through a three-layer co-extrusion-biaxial stretching process, and has excellent flame-retardant performance, thermal stability and anti-migration performance.
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Citation Information

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