Insulating Resin Composition for Low-Loss Heat-Resistant Wire
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Solution Overview
Problem
Conventional insulating layers in electric wires experience increased dissipation factors when containing antioxidants, leading to higher transmission losses and reduced durability in high-temperature environments, particularly failing to meet ISO 6722-1 heat-resistant aging standards.
Innovation Solution
A resin composition for insulating layers comprising an olefinic resin as the main component, with a metal deactivator content exceeding 0.05% by mass and a melting point of 200°C or higher, specifically using salicylic acid or phthalic acid derivatives, which reduces the dissipation factor and inhibits metal-induced deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulating layer contains an antioxidant, then durability in high-temperature environments is improved, but the dissipation factor increases leading to higher transmission losses
Solution Approach 1:
The patent changes the chemical parameters of the antioxidant by specifying particular chemical structures (aromatic secondary amine compounds with specific molecular formulas) and controlling the content ratio between metal deactivator and antioxidant (0.01-5 mass%) to achieve both low dissipation factor and high durability
Solution Approach 2:
The patent creates a composite insulating material system combining olefinic polymer base resin with specific additives (metal deactivator and antioxidant in controlled ratios) to achieve properties that neither component alone can provide, specifically low dissipation factor combined with high heat resistance
2Loss of energy
If the dissipation factor is reduced to minimize transmission losses, then energy efficiency is improved, but durability in high-temperature environments deteriorates
Solution Approach 1:
The patent optimizes the concentration and chemical structure parameters of additives to achieve the counterintuitive result that low dissipation factor and high durability can coexist by using aromatic secondary amine compounds with specific molecular formulas and controlling additive ratios
Solution Approach 2:
The patent introduces a metal deactivator as an intermediary substance that works synergistically with the antioxidant to protect the insulating layer from metal-induced deterioration while maintaining low dissipation factor, effectively mediating between the conflicting requirements
3Object-affected harmful factors
If conventional antioxidants are used in insulating layers, then metal-induced deterioration is inhibited, but the insulating layer fails to meet heat-resistant aging standards
Solution Approach 1:
The patent changes the chemical parameters by specifying aromatic secondary amine compounds with particular molecular formulas and controlling the content ratio of metal deactivator to antioxidant, enabling the insulating layer to pass heat-resistant aging tests while maintaining protection against metal-induced deterioration
Solution Approach 2:
The patent replicates and optimizes the protective function of antioxidants by using specific aromatic secondary amine compounds that effectively inhibit metal-induced deterioration while maintaining compatibility with heat-resistant aging requirements
Data Source
AI summary
A resin composition for an insulating layer includes: an olefinic resin as a main component; and a metal deactivator, wherein the olefinic resin consists of block polypropylene and polyethylene, and wherein a content of the polyethylene in the olefinic resin is greater than or equal to 1% by mass and less than or equal to 10% by mass.