Preparation method of melt-blown fabric flexible wave-absorbing material

By combining polypropylene meltblown fabric with Ni-Zn ferrite microwave absorbing agent and employing ultrasonic cleaning, plasma modification, and ultrasonic impregnation processes, a lightweight and flexible microwave absorbing material is prepared. This solves the problem of rigidity and heaviness of traditional microwave absorbing materials, achieving high-efficiency microwave absorption performance and wearability, making it suitable for wearable electronic and electromagnetic shielding.

CN122304177APending Publication Date: 2026-06-30SHENYANG UNIV
View PDF 5 Cites 0 Cited by

Patent Information

Application Number
CN202610669520.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-15
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional microwave absorbing materials suffer from rigidity, weight, and poor flexibility, making them unsuitable for wearable devices and flexible electronics applications. Furthermore, existing manufacturing processes are complex, costly, and difficult to scale up.

Method used

Using polypropylene meltblown fabric as the matrix, the surface adhesion is improved through ultrasonic cleaning and plasma modification treatment. Combined with the coupling modification of Ni-Zn ferrite microwave absorbing agent and dual dispersion process, the microwave absorbing slurry is uniformly loaded onto the meltblown fabric matrix using an ultrasonic-assisted impregnation process, and then cured to obtain a flexible microwave absorbing material.

Benefits of technology

The prepared absorbing material is lightweight, flexible, and has excellent absorption performance. It is suitable for wearable electronics and electromagnetic shielding applications, with low reflection loss, wide bandwidth, simple and controllable process, and is suitable for mass production.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122304177A_ABST
    Figure CN122304177A_ABST
Patent Text Reader

Abstract

This invention relates to the technical field of functional textile materials and electromagnetic shielding materials, specifically to a method for preparing a flexible meltblown fabric microwave absorbing material, overcoming the shortcomings of traditional microwave absorbing materials such as rigidity, heaviness, and poor flexibility. Using polypropylene meltblown fabric as a flexible matrix, surface adhesion is improved through dual pretreatment of ultrasonic cleaning and plasma modification. Ni-Zn ferrite is used as a single absorbing agent, and a uniform and stable absorbing slurry is prepared through coupling modification, ball milling, high-speed stirring, ultrasonic dispersion, and secondary high-speed stirring dispersion processes. This slurry is then subjected to ultrasonic-assisted impregnation and curing. The microwave absorbing material prepared by this invention exhibits excellent absorption performance in the Ka band (26.5~40GHz), with a minimum reflection loss of -18dB and an effective bandwidth of 6.5GHz, while maintaining the lightweight and flexible characteristics of meltblown fabric. The process is simple, controllable, and scalable, and can be widely applied in wearable electronics, electromagnetic shielding, and other fields.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Carbon and carbon nitride in-plane conjugated two-dimensional wave-absorbing material as well as preparation method and application thereof

    CN117143563A

  • Absorption loss type electromagnetic shielding material based on conductive nanofiber and preparation method thereof

    CN117364288A

  • Ultra-wideband wave-absorbing metamaterial covering wave band from P to Ku as well as preparation method and application of ultra-wideband wave-absorbing metamaterial

    CN118399092A

  • Gradient multi-layer composite wave-absorbing material with broadband absorption and preparation method of gradient multi-layer composite wave-absorbing material

    CN119283397A

  • Alumina ceramic-based wave-absorbing material and preparation method thereof

    CN120987637A