Lightweight RF Shielding Tape via Calendered Conductive Elastomer
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Solution Overview
Problem
Conventional conductive elastomeric tapes used for RF shielding are heavy, contributing significantly to the weight and fuel costs of aircraft, and there is a need for lighter alternatives that maintain or improve shielding effectiveness.
Innovation Solution
A lightweight RF shielding conductive elastomeric tape is developed, featuring a calendered conductive material layer encapsulated between protective polymer layers, which reduces material usage and weight while maintaining high shielding efficacy through the use of a calendering apparatus and specific polymer and conductive material combinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conductive elastomeric tapes are used for RF shielding, then good radio frequency electromagnetic interference shielding is achieved, but the weight increases significantly
Solution Approach 1:
The patent uses a composite structure consisting of a conductive material layer (such as metal powder, flake, or fiber) embedded within an elastomeric polymer matrix. This composite approach provides effective RF shielding through the conductive network while the polymer matrix reduces overall density and weight compared to solid metal shielding materials. The composite structure allows optimization of both shielding effectiveness and weight by adjusting the conductive filler content and distribution.
Solution Approach 2:
The patent employs thin film or sheet form factor for the conductive elastomeric tape, which reduces material usage and weight compared to bulk shielding materials. The thin film structure is applied as a coating or laminate on aircraft surfaces, providing RF shielding functionality with minimal thickness and weight addition. This approach transforms heavy bulk shielding into lightweight thin-film solutions while maintaining protective functionality.
2Use of energy by moving object
If the weight of conductive elastomeric tape is reduced, then fuel efficiency improves, but shielding effectiveness may be compromised
Solution Approach 1:
The patent optimizes parameters such as the concentration and distribution of conductive filler materials within the elastomeric matrix to achieve maximum shielding effectiveness at minimum weight. By controlling the weight percentage of conductive particles, their size distribution, and spatial arrangement, the formulation achieves effective RF shielding with reduced material content compared to conventional tapes. This parameter optimization allows weight reduction while maintaining or improving shielding performance.
Solution Approach 2:
The patent creates localized conductive networks within the elastomeric matrix where conductive particles are strategically distributed to form effective shielding paths. Rather than uniform distribution, the local quality approach concentrates conductive material in areas most critical for RF blocking while using lighter polymer material in less critical regions. This localized optimization reduces overall weight while maintaining shielding effectiveness at critical interfaces and surfaces.
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 solution achieves a significant weight reduction of up to 50% compared to conventional tapes, improved flexibility, and enhanced RF shielding performance, leading to increased fuel efficiency and reduced life cycle costs for aircraft.
Implementation Method 1
The tapes generally include a conductive layer including conductive material to block the interfering waves
Implementation Method 2
The conductive layer is calendered using a calender apparatus
Data Source
AI summary
A lightweight electromagnetic wave shielding tape is disclosed. The tape includes a first polymer protective layer, a calendered conductive material layer coupled to a bottom side of the first polymer protective layer, and a second polymer protective layer coupled to a bottom side of the conductive material layer so that the conductive material layer is encapsulated within the protective layers. An adhesive layer can also be applied to one of the protective layers.