Flexible EMI Shielding Laminate With Incisions for 3D Stretchability
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Solution Overview
Problem
Existing laminates for shielding electromagnetic radiation lack high stretchability and tend to tear uncontrollably when applied to complex three-dimensional structures, leading to impaired shielding effectiveness.
Innovation Solution
A flexible laminate comprising a metal foil and a flat substrate with specific geometric incisions that allow for complete cutting through both materials, enhancing extensibility and maintaining electromagnetic shielding properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional laminates without incisions are used, then electromagnetic shielding effectiveness is maintained, but stretchability is limited and uncontrollable tearing occurs when applied to complex three-dimensional structures
Solution Approach 1:
The laminate is segmented through incisions that divide the continuous metal foil and substrate into sections. These incisions create controlled separation points that allow the laminate to stretch and conform to three-dimensional structures without causing uncontrolled tearing, thereby improving adaptability while maintaining shielding effectiveness through the remaining continuous conductive paths.
2Ease of operation
If the laminate is made more flexible through traditional methods, then it can be applied to complex structures, but shielding effectiveness deteriorates due to material damage
Solution Approach 1:
The incisions are strategically positioned in specific local regions of the laminate where flexibility is needed, rather than uniformly throughout. This localized modification allows the laminate to bend and stretch in specific areas to conform to complex structures while maintaining continuous conductive paths in other areas, thus preserving electromagnetic shielding effectiveness.
3Shape
If preforming is used to prepare the laminate for complex structures, then fit is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The incisions are created during the laminate manufacturing process as a preliminary action, before the laminate is applied to the final structure. This pre-preparation of the laminate with strategic cut patterns enables it to be directly formed and conform to complex three-dimensional structures without requiring additional preforming steps, thereby improving fit while simplifying the overall manufacturing process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The laminate achieves high extensibility in multiple directions with improved mechanical properties, allowing for effective electromagnetic shielding of complex structures without preforming, suitable for use in electric vehicles and aerospace applications.
Implementation Method 1
a flexible laminate for shielding electromagnetic radiation, comprising a) at least one metal foil, and b) a flat substrate as carrier material
Implementation Method 2
the laminate comprises a plurality of objects formed from cuts in the base surface of the laminate, each object consisting of two or more cuts having a common starting point
Data Source
Figure 1a~1e
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AI summary
The present invention relates to a flexible laminate for shielding electromagnetic radiation, comprising a) at least one metal film and b) a planar substrate, comprising or consisting of a fiber material, film material or foam material, wherein the laminate has a multiplicity of objects formed by incisions into the base of the laminate, to a method for producing a component shielded from electromagnetic radiation, in which such a laminate is used, and to the use of the laminate for shielding electromagnetic rays.