A noise-reducing foamed material and a process for its production

By synergistically designing a gradient porous framework, amphiphilic microcapsules, and nano-damping networks, the problems of insufficient low-frequency performance and poor multi-frequency dissipation capability of existing noise-reducing foam materials at thin thicknesses are solved, achieving a balance between wideband noise reduction and mechanical properties, making it suitable for high-end NVH control applications.

CN122103873APending Publication Date: 2026-05-29HUNAN SANXIE TECH DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN SANXIE TECH DEV CO LTD
Filing Date
2026-04-02
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing noise-reducing foam materials have insufficient low-frequency performance at thin thicknesses, poor multi-band synergistic dissipation capability, and difficulty in achieving both mechanical and acoustic properties, thus limiting their application in high-end NVH control and other fields.

Method used

Employing a porous framework design with gradient variations in pore size and density along the thickness direction, combined with amphiphilic microcapsules and a three-dimensional nano-damping network, a macroscopic gradient framework, a mesoscopic interface damping layer, and a microscopic permeation network are formed. Through foaming kinetics, interface self-assembly, and the confined space concentration effect, a three-level synergistic structure is simultaneously constructed in a single-step foaming process.

Benefits of technology

It significantly improves the broadband noise reduction performance under thin thickness, especially the low-frequency sound absorption capability, takes into account both mechanical and acoustic properties, reduces production difficulty and cost, and has good industrialization prospects.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The application discloses a noise reduction foaming material and a preparation process thereof, and relates to the technical field of high polymer functional materials. The noise reduction foaming material comprises a porous framework, amphiphilic microcapsules and a three-dimensional nano damping network. The pore diameter and / or density of the porous framework change in a gradient along the thickness direction. The amphiphilic microcapsules are anchored to the pore wall interface of the porous framework to form an interface damping layer. The three-dimensional nano damping network is formed inside the pore edges of the porous framework and has a mutual lap seepage network structure in the pore edges. The noise reduction foaming material provided by the application can significantly improve the wide-frequency noise reduction performance under a thin thickness, and can realize good compromise between mechanical performance and acoustic performance, and has good industrialization prospect.
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