Thermoplastic Arc-Resistant Composite for Circuit Breaker Insulation
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Solution Overview
Problem
Existing thermoset materials used for circuit protection in electrical applications have high carbon footprints and health hazards, and thermoplastic materials lack the ability to withstand high-energy arcing and tracking, necessitating the development of sustainable, recyclable, and effective thermoplastic composites for insulation.
Innovation Solution
A thermoplastic composite comprising 30-70% thermoplastic polymer matrix, 10-40% non-halogenated flame retardant filler, 0.1-2% processing aid, 5-40% reinforcing filler, and 5-15% functional filler, which enhances arc resistance, tracking resistance, and dielectric strength, while being environmentally friendly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermoset materials are used for circuit protection, then arc resistance and tracking resistance are improved, but carbon footprint and health hazards increase
Solution Approach 1:
The patent creates a composite material system combining thermoplastic polymer matrix with multiple types of fillers (flame retardant, reinforcing, and functional fillers). This composite approach allows achieving arc resistance and tracking resistance comparable to thermoset materials while maintaining the environmental benefits of thermoplastics, including recyclability and lower carbon footprint.
2Ease of manufacture
If thermoplastic materials are used for insulation, then recyclability and manufacturing efficiency are improved, but arc resistance and tracking resistance deteriorate
Solution Approach 1:
The patent develops a composite formulation that combines thermoplastic polymer with specific ratios of flame retardant fillers (10-40 wt%), reinforcing fillers (5-40 wt%), and functional fillers (5-15 wt%). This composite structure provides the necessary arc resistance and tracking resistance while preserving the manufacturing efficiency and recyclability of thermoplastic materials.
Solution Approach 2:
The patent modifies the chemical and physical parameters of the thermoplastic material by incorporating specific filler types and concentrations. The flame retardant fillers provide arc quenching capability, while the functional fillers enhance tracking resistance, thereby changing the material properties to meet electrical safety requirements without sacrificing manufacturing advantages.
3Reliability
If flame retardant fillers are added to thermoplastic, then arc quenching capability is improved, but material homogeneity deteriorates
Solution Approach 1:
The patent creates a multi-phase composite where flame retardant fillers are distributed within the thermoplastic matrix along with reinforcing and functional fillers. The specific formulation ratios and processing methods ensure adequate dispersion of fillers to achieve homogeneous properties while maintaining arc quenching capability through the presence of flame retardant components.
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 composite effectively quenches high-energy arcs, meets regulatory compliance, and reduces carbon footprint, providing improved insulation and circuit protection in electrical components.
Implementation Method 1
The composite effectively quenches high-energy arcs, meets regulatory compliance, and reduces carbon footprint
Data Source
AI summary
The disclosed concept pertains to thermoplastic based materials, e.g., thermoplastic based composites, that are suitable replacements for known thermoset based materials, e.g., unsaturated polyesters, as insulators for circuit protection in electrical contact / non-contact applications, such as, but not limited to, housings, casings, enclosures, encapsulated or over-molded parts. In certain embodiments, the thermoplastic based materials house miniature circuit breakers, and arc and ground fault circuit breakers.