Multicore Cable Layer Structure for Heat and Chemical Resistance
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Solution Overview
Problem
There is a demand for multicore cables with heat resistance and chemical resistance, particularly for use in automotive applications where high temperatures and exposure to chemicals like oil are common, and existing cables do not adequately meet these requirements.
Innovation Solution
A multicore cable design featuring a plurality of sheathed wires with a first cover layer made of crosslinked fluoroelastomer or fluororesin and a second cover layer made of crosslinked fluoroelastomer, providing enhanced heat and chemical resistance, along with adjustable adhesion and twist pitch to balance durability and ease of handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional insulator materials are used, then manufacturing cost is reduced, but heat resistance and chemical resistance are insufficient
Solution Approach 1:
The patent uses a composite material structure with an inner crosslinked fluoroelastomer layer providing chemical resistance and an outer fluororesin layer providing heat resistance. This combination of materials achieves both heat resistance (withstanding temperatures up to 200°C) and chemical resistance (resisting oil and other chemicals) while being applicable to existing cable manufacturing processes.
2Reliability
If thicker insulator layers are used, then heat resistance is improved, but cable flexibility and handling ease deteriorate
Solution Approach 1:
The patent applies different material properties to different layers: the inner crosslinked fluoroelastomer layer (0.05-0.2 mm thick) provides chemical resistance and flexibility, while the outer fluororesin layer (0.03-0.1 mm thick) provides heat resistance. This layered approach with optimized thickness for each layer achieves heat resistance without excessive overall thickness that would reduce flexibility.
3Reliability
If crosslinked fluoroelastomer and fluororesin are used, then heat resistance and chemical resistance are improved, but adhesion between layers may deteriorate
Solution Approach 1:
The patent specifies precise thickness ranges for each layer (inner layer: 0.05-0.2 mm, outer layer: 0.03-0.1 mm) to optimize both protection performance and adhesion. The crosslinking degree and material formulation are also controlled within specific parameters to ensure sufficient adhesion between layers while maintaining the heat and chemical resistance properties.
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 cable achieves excellent heat resistance and chemical resistance, with the crosslinked materials increasing decomposition temperature and fluorine-based resins providing chemical resilience, while the adjustable adhesion and twist pitch enhance workability and connectivity.
Implementation Method 1
the first cover layer is a crosslinked fluoroelastomer or a crosslinked fluororesin, and the second cover layer is a crosslinked fluoroelastomer
Implementation Method 2
by using the crosslinked material as a material used for the first cover layer and the second cover layer, a decomposition temperature increases, thereby making it is possible to obtain a multicore cable having an excellent heat resistance
Implementation Method 3
because both the crosslinked fluororesin and the crosslinked fluoroelastomer are fluorine-based resins or elastomers, these materials have an excellent chemical resistance
Data Source
AI summary
A multicore cable includes a plurality of sheathed wires, and a second cover layer covering an outer periphery of the plurality of sheathed wires, wherein the sheathed wire includes a conductor, and a first cover layer covering the conductor, the first cover layer is a crosslinked fluoroelastomer or a crosslinked fluororesin, and the second cover layer is a crosslinked fluoroelastomer.