Metal-resin composite electromagnetic shielding material

A metal-resin composite shielding material with controlled adhesive layer air bubbles addresses cracking issues, ensuring stable moldability and enhanced shielding performance.

JP7833481B2Active Publication Date: 2026-03-19JX NIPPON MINING & METALS CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-07-08
Publication Date
2026-03-19

AI Technical Summary

Technical Problem

Metal foils used in electromagnetic shielding materials are prone to cracking when laminated with resin films, leading to decreased shielding performance and moldability issues, especially during large-scale molding processes.

Method used

A metal-resin composite electromagnetic shielding material is developed with controlled air bubble ratios in the adhesive layer closest to the outer surface, limiting the bubble percentage to 4.5% or less, which enhances moldability and reduces cracking during molding.

Benefits of technology

The material achieves stable moldability and improved electromagnetic shielding performance by suppressing metal layer cracking, allowing for complex shape formation and weight reduction.

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Patent Text Reader

Abstract

The present invention provides a metal resin composite electromagnetic shielding material which is obtained by stacking N-number of metal layers (N represents an integer of 1 or more) and M-number of resin layers (M represents an integer of 1 or more), with adhesive layers being interposed therebetween, wherein an adhesive layer that is closest to the outer surface of the metal resin composite electromagnetic shielding material has an air bubble proportion of 4.5% or less when the adhesive layer is observed from the resin layer side.
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Citation Information

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