Magnetic Resin Shielding Material for 3D Formability
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Solution Overview
Problem
Existing electromagnetic wave shielding materials lack both high shielding ability and excellent formability, which are essential for effectively reducing electromagnetic wave interference in electronic components and apparatuses without causing shape defects or breakage during three-dimensional forming.
Innovation Solution
An electromagnetic wave shielding material comprising one or more magnetic layers with magnetic particles and a resin, where the peak top temperature of the loss tangent Tan δ is between 0°C and 60°C, and optionally including pressure-sensitive adhesive layers, metal layers, and a resin layer, ensuring high magnetic permeability and suitable for cold forming without breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a soft magnetic film is used as electromagnetic wave shielding material, then shielding ability is improved, but formability deteriorates due to breakage in three-dimensional forming
Solution Approach 1:
The patent uses a composite material consisting of magnetic particles (providing shielding ability) dispersed in a rubber-based resin matrix (providing formability). This composite structure allows the material to exhibit both high magnetic permeability for electromagnetic wave shielding and excellent elasticity for three-dimensional forming without breakage.
Solution Approach 2:
The patent specifies that the peak top temperature of the loss tangent Tan δ must be 0°C or higher and lower than 60°C. This parameter control ensures the resin maintains appropriate viscoelastic properties at room temperature for formability while providing sufficient damping. Additionally, the storage elastic modulus is controlled to be 0.010 GPa or more and less than 10.000 GPa at 60°C, optimizing both shielding and formability.
2Reliability
If magnetic particles and resin are combined in magnetic layers, then shielding ability is improved, but formability deteriorates due to shape defects and breakage
Solution Approach 1:
The patent controls the peak top temperature of the loss tangent Tan δ to be between 0°C and 60°C, and the storage elastic modulus at 60°C to be between 0.010 GPa and 10.000 GPa. These parameter specifications ensure the magnetic layer maintains optimal viscoelastic properties for three-dimensional forming without shape defects or breakage while preserving shielding ability.
Solution Approach 2:
The magnetic layers are formed as composites of magnetic particles dispersed in a rubber-based resin, providing both magnetic shielding properties and mechanical flexibility for precise forming operations.
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 material achieves a high shielding ability against electromagnetic waves while maintaining excellent formability, allowing for successful three-dimensional forming without breakage and providing a suitable elongation rate for cold forming processes.
Implementation Method 1
one or more magnetic layers containing magnetic particles and a resin
Implementation Method 2
a peak top temperature (hereinafter, also described as a 'peak top temperature of Tan δ') of a loss tangent Tan δ in a dynamic viscoelasticity measurement at 1 Hz is 0° C. or higher and lower than 60° C.
Data Source
AI summary
There are provided an electromagnetic wave shielding material including one or more magnetic layers containing magnetic particles and a resin, in which a peak top temperature of a loss tangent Tan δ in a dynamic viscoelasticity measurement at 1 Hz is 0° C. or higher and lower than 60° C., as well as an electronic component and an electronic apparatus which include the electromagnetic wave shielding material.