Composite cloth with electromagnetic shielding effect and preparation and application thereof

By introducing a similar composite material as an intermediate layer into the bulletproof composite fabric and employing ultrasonic reinforcement technology, the problem of balancing electromagnetic shielding function and bulletproof performance was solved, achieving a combination of efficient electromagnetic shielding and bulletproof performance, and ensuring the long-term mechanical stability and lightweight of the material.

CN122275336APending Publication Date: 2026-06-26SHANGHAI RES INST OF CHEM IND CO LTD
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Patent Information

Application Number
CN202610401965.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-30
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

When existing bulletproof composite fabrics are given electromagnetic shielding functions, they usually lead to a decrease in bulletproof performance. Furthermore, the interfacial bonding force in existing technologies is weak, resulting in insufficient mechanical stability over long-term use.

Method used

Using composite materials of the same type as the intermediate layer matrix material, the composite matrix material is made by mixing ultra-high molecular weight polyethylene fiber with multi-walled carbon nanotubes to form a uniformly dispersed mixture. This mixture is sandwiched between high-performance UHMWPE unidirectional fabrics to form a 'sandwich' structure. Combined with ultrasonic reinforcement technology, the interfacial bonding force and the stability of the conductive network are ensured.

Benefits of technology

It achieves excellent electromagnetic shielding performance while minimizing mechanical performance loss, and maintains ballistic protection performance. The overall structure is lightweight and easy to mass-produce.

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Abstract

The invention relates to composite cloth with an electromagnetic shielding effect and preparation and application of the composite cloth. The composite cloth is a composite base material prepared by taking ultra-high molecular weight polyethylene fibers and multi-walled carbon nanotubes as main raw materials, and then the base material is clamped between two layers of single-layer cloth. The preparation method comprises the following steps: a) after chopping the ultra-high molecular weight polyethylene fiber, mixing the chopped ultra-high molecular weight polyethylene fiber with the multi-walled carbon nanotube, the waterborne polyurethane and the dichloromethane; b) ultrasonically stirring the mixture obtained in the step a), and uniformly mixing; c) pouring the mixture uniformly mixed in the step b) into a mold, and performing drying, degassing and hot-pressing shaping to obtain a composite matrix material; d, the obtained composite base material is laid between the first layer of single-layer cloth and the second layer of single-layer cloth, and the composite cloth with the electromagnetic shielding effect is obtained.Compared with the prior art, the bulletproof composite cloth has the excellent electromagnetic shielding effectiveness on the premise that the mechanical property loss is minimized.
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