An environmentally friendly electromagnetic shielding fiber material and its preparation method

By adding nano-copper oxide, nano-silver oxide, or graphene to PET and COPET fiber composite materials, a dual electromagnetic shielding mechanism is formed, which solves the problem of high TVOC release in existing electromagnetic shielding materials and achieves a balance between high-efficiency electromagnetic shielding and environmental protection performance.

CN122082154APending Publication Date: 2026-05-26SICHUAN YINITE NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN YINITE NEW MATERIAL CO LTD
Filing Date
2026-04-03
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

While existing fiber-based electromagnetic shielding materials improve electromagnetic shielding effectiveness, they struggle to control the release of low-volatile organic compounds (TVOCs), affecting user experience and air quality, and failing to meet environmental standards.

Method used

The fiber composite material made of PET and COPET forms a dual electromagnetic shielding mechanism that synergizes dielectric and conductive losses by adding nano-metal shielding materials such as nano-copper oxide, nano-silver oxide or graphene to the sheath layer. The preparation methods include coaxial electrospinning and steam forming.

Benefits of technology

It significantly improved electromagnetic shielding effectiveness from 12dB to 58dB, while reducing TVOC content from 5125μg/m3 to 293μg/m3, achieving a balance between high-efficiency electromagnetic shielding and environmental performance.

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Abstract

This invention belongs to the field of fiber composite material technology, specifically relating to an environmentally friendly electromagnetic shielding fiber material and its preparation method. This invention enhances the electromagnetic shielding performance of a fiber composite material composed of PET (core layer) and COPET (sheath layer) by adding a nano-metal shielding material to the sheath layer, thereby reducing the TVOC content. The electromagnetic shielding effectiveness of the fiber composite material with the added nano-metal shielding material increases from 12dB to 58dB, and the TVOC content decreases from 5125μg / m³. 3 Reduced to 293 μg / m 3 .
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Citation Information

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