Insulated Data Cable Composition for Low Dielectric Loss and Heat Resistance
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Solution Overview
Problem
Conventional in-vehicle information electric wires face challenges with increased dielectric dissipation factors, leading to signal attenuation and reduced heat resistance, especially when using antioxidants in insulating layers.
Innovation Solution
An insulated electric wire with an insulating layer containing olefinic resin and a specific ratio of phenolic and sulfur-based antioxidants, along with a metal deactivator, to reduce dielectric dissipation factors and enhance heat resistance, while maintaining electric characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If antioxidants are added to the insulating layer to improve heat resistance, then heat resistance is improved, but dielectric dissipation factor increases
Solution Approach 1:
The patent changes the chemical composition parameters of the antioxidant system by specifying precise proportions of phenolic antioxidants (0.01-5 mass%) and sulfur-based antioxidants (0.01-5 mass%), while excluding sulfur-containing phenolic antioxidants. This parameter optimization resolves the contradiction by achieving heat resistance improvement with minimal impact on dielectric dissipation factor.
Solution Approach 2:
The patent uses a composite antioxidant system combining phenolic antioxidants and sulfur-based antioxidants in specific ratios within the olefinic resin insulating layer. This composite approach allows the synergistic effect of different antioxidant types to improve heat resistance while maintaining low dielectric dissipation factor, as each component contributes differently to thermal stability versus electrical properties.
2Speed
If signal transmission speed is increased by reducing dielectric dissipation factor, then transmission speed is improved, but heat resistance deteriorates
Solution Approach 1:
The patent optimizes the antioxidant concentration parameters within the insulating layer to achieve a balance where dielectric dissipation factor remains low (0.001 or less) for high-speed signal transmission, while heat resistance is maintained through the presence of antioxidants at 0.01-5 mass% of the olefinic resin.
Solution Approach 2:
The composite antioxidant system in the olefinic resin insulating layer provides dual functionality: phenolic antioxidants contribute to heat resistance while sulfur-based antioxidants help maintain low dielectric dissipation factor, enabling both high-speed transmission and adequate heat resistance.
Data Source
AI summary
An insulated electric wire according to one aspect includes at least one linear conductor, and at least one insulating layer layered on the outer peripheral surface of the conductor, wherein the insulating layer contains an olefinic resin and an antioxidant, the content of the antioxidant is more than 1.0 part by mass and 5.0 parts by mass or less per 100 parts by mass of the olefinic resin, and the antioxidant comprises a phenolic antioxidant and a sulfur-based antioxidant except for a sulfur-containing phenolic antioxidant.