Preparation method of superfine denier electromagnetic shielding functional polyamide fiber and product thereof

By optimizing the preparation process of ultrafine denier electromagnetic shielding nylon, the problems of fiber breakage and masterbatch dispersion have been solved, achieving efficient production and excellent electromagnetic shielding performance, making it suitable for high-end application scenarios.

CN122105662APending Publication Date: 2026-05-29福建恒捷实业有限公司
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Patent Information

Application Number
CN202610206661.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-12
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Ultrafine denier nylon fiber is prone to breakage during spinning, and the masterbatch has poor dispersion, leading to unstable production. Furthermore, the amount of electromagnetic shielding added affects the spinnability and mechanical properties of the fiber, making it difficult to balance production costs and shielding effectiveness.

Method used

By employing stepwise mixing, gradient heating, precise filter filtration, and multi-stage drawing processes, combined with a specific composition of electromagnetic shielding masterbatch, and optimizing process parameters to ensure the spinnability and electromagnetic shielding performance of the fiber, electromagnetic shielding nylon with a single filament fineness of 0.2-0.5 dtex is prepared by controlling factors such as moisture, temperature, and wind speed.

Benefits of technology

It achieves uniform fiber dispersion and good spinnability with high masterbatch content, low breakage rate, electromagnetic shielding effectiveness of 40dB in the 2000MHz range, and thermal stability superior to pure nylon, making it suitable for high-end clothing, home textiles and electronic protection fields.

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Abstract

The application discloses a preparation method of superfine denier electromagnetic shielding functional chinlon and a product thereof. The chinlon is prepared by mixing 2-7% electromagnetic shielding functional chinlon master batch containing Fe3O4 nanoparticles and 93-98% pure chinlon chips, and then performing drying, melt extrusion, spinning cooling, oiling treatment, drafting setting and winding silk collection. In the preparation process, key parameters such as spinning temperature, filter mesh size, cooling parameter and drafting multiple are optimized, so that the problems of superfine denier fiber spinning breakage, product adhesion and uneven dispersion under high master batch content are solved. The chinlon monofilament fineness obtained by the application is 0.2-0.5 dtex, the breaking strength is greater than or equal to 3.0 cN / dtex, the electromagnetic shielding effectiveness reaches 40 dB in a frequency range of 2000 MHz, the thermal stability is better than that of pure chinlon, and the application is suitable for high-end application scenes such as high-grade clothes, home textiles, electronic protection and filtering materials.
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