Stretchable Wiring Sheet With Segmented Electrode Fixing
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Solution Overview
Problem
The existing wiring sheets with a pseudo sheet structure have high resistance values and lack stretchability in the axial direction due to firmly fixed electrodes, which hinders their functionality as heat-generating bodies or protection films.
Innovation Solution
A wiring sheet design featuring a pseudo sheet structure with conductive linear bodies and electrodes connected via contact fixing members, such as metal, adhesive agents, or crimping, which are independently arranged to stabilize resistance values and allow for axial stretchability, supported by a stretchable resin layer and base material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrodes are firmly fixed to the linear bodies by a resin layer, then electrical connection is improved, but stretchability in axial direction deteriorates
Solution Approach 1:
The contact fixing members are arranged independently at discrete intervals along the linear bodies rather than forming a continuous resin layer. This segmentation allows the structure to be electrically connected at specific points while maintaining flexibility and stretchability in the regions between the contact fixing members.
Solution Approach 2:
The resin layer is applied locally only at the contact portions where electrodes meet linear bodies, rather than forming a continuous layer across the entire structure. This localized application provides sufficient electrical connection at critical points while preserving the overall stretchability of the wiring sheet.
2Reliability
If contact fixing members are firmly bonded, then electrical connection stability is improved, but resistance value increases
Solution Approach 1:
The resin material is applied locally only at the contact portions between electrodes and linear bodies, minimizing the amount of resistive material in the current path while ensuring stable electrical connection at the interface points.
Solution Approach 2:
The contact fixing members utilize composite material properties combining resin's adhesive capability for stable bonding with conductive fillers or metallic particles that maintain low electrical resistance at the contact interface.
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 effectively stabilizes resistance values and enhances stretchability in the axial direction, preventing electrode separation and improving the sheet's performance as a heat-generating body or protection film.
Implementation Method 1
the conductive linear bodies and the electrodes are fixed with contact fixing members
Implementation Method 2
the contact fixing members are preferably at least one selected from the group consisting of a metal, an adhesive agent, and crimping
Implementation Method 3
the contact fixing members are preferably at least in a form of a solidified product of a molten resin of the base material
Implementation Method 4
the contact fixing members are formed by at least one method selected from the group consisting of hot press, high-frequency welding, hot-air welding, hot-plate welding, and ultrasonic welding
Data Source
AI summary
A wiring sheet includes a pair of electrodes and a pseudo sheet structure including a plurality of conductive linear bodies arranged at intervals, in which the pseudo sheet structure is electrically connected to the electrodes, and the conductive linear bodies and the electrodes are fixed with contact fixing members.