Multilayer material with wave-absorbing and anti-impact functions and preparation method thereof

By employing a multi-layered structural design, combining a PMI foam absorbing layer, an ultra-high molecular weight polyethylene absorbing layer, a carbon fiber reflective layer, and a ceramic layer, the problem of integrating wave absorption and shock protection functions was solved, achieving compatibility between broadband wave absorption and shock protection performance, while reducing structural weight and thickness.

CN122232277APending Publication Date: 2026-06-19BEIJING INST OF ENVIRONMENTAL FEATURES
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Patent Information

Application Number
CN202610341359.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-19
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing materials are difficult to integrate with wave absorption and shock protection, resulting in increased structural thickness and weight, which affects the scope of engineering applications.

Method used

It adopts a multi-layer structure design, including a PMI foam absorbing layer, an ultra-high molecular weight polyethylene absorbing layer, a carbon fiber reflective layer, a ceramic layer, and an ultra-high molecular weight polyethylene consumable layer. By designing the thickness of the dielectric layer and the concentration of the absorbing functional paper, impedance matching and electromagnetic loss of electromagnetic waves are achieved. Combined with the toughness and hardness characteristics of the materials, broadband wave absorption and shock resistance are achieved.

Benefits of technology

It achieves an integrated design of wideband absorption performance and shock resistance, reducing the overall structural weight and thickness of the compatible absorption and shock resistance functions. It has excellent absorption performance in the range of 2-18GHz and 26.5-40GHz, while also having a certain degree of shock resistance.

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Abstract

The invention relates to the technical field of composite materials, in particular to a multi-layer material with wave-absorbing and anti-impact functions and a preparation method thereof.The multi-layer material sequentially comprises a PMI foam wave-absorbing layer, an ultra-high molecular weight polyethylene wave-absorbing layer, a carbon fiber reflecting layer, a ceramic layer and an ultra-high molecular weight polyethylene consuming layer from outside to inside; structural design is carried out through characteristics of various materials, a multi-layer structure compatible with wave-absorbing and anti-impact functions is designed and prepared, and the wave-absorbing and anti-impact wave-absorbing material has excellent wave-absorbing performance in wave bands of 2-18 GHz and 26.5-40 GHz and has certain anti-impact performance at the same time. The multilayer structure can be designed and adjusted according to different wave-absorbing requirements and anti-impact requirements, and has the characteristic of remarkable practicability.
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