Polymeric Insulating Films Using Polymer Blends
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Solution Overview
Problem
Conventional high-performance thermoplastic insulating films are expensive and do not offer sufficient cost-effective alternatives for improved insulation performance in applications such as magnet wire and electric devices.
Innovation Solution
The development of polymeric insulating films formed from blends of two or more polymeric materials, such as PEEK, PEKK, PPSU, and PEI, which provide similar performance to high-cost single polymers at a lower material cost, incorporating electrically conductive layers for enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional high-performance thermoplastic materials (e.g., PEEK, aramid polymers) are used to form insulating films, then insulation performance and reliability are improved, but material cost increases significantly
Solution Approach 1:
The patent applies composite materials by blending multiple thermoplastic polymers (e.g., polyimide, polyamide, polyester) in specific ratios to create an insulating film that achieves performance comparable to expensive single-material options like PEEK. The composite blend optimizes properties such as dielectric strength, thermal stability, and mechanical strength while reducing material cost through the use of more economical polymer components.
2Ease of manufacture
If conventional single-polymer insulating films are used, then manufacturing process is simple, but insulation performance and functional properties are limited
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the insulating film through polymer blending. By adjusting the types and proportions of thermoplastic polymers in the blend, the film's properties (dielectric breakdown strength, temperature rating, mechanical strength) are optimized to exceed those of conventional single-polymer films, while still maintaining manufacturability through standard extrusion and lamination processes.
3Adaptability or versatility
If electrically conductive layers are added to polymeric insulating films, then electromagnetic shielding and functional properties are improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by integrating electrically conductive layers within the multi-layer polymeric film structure. These conductive layers provide electromagnetic shielding, static dissipation, or EMI filtering capabilities, allowing the insulating film to simultaneously perform electrical insulation and electromagnetic protection functions. This eliminates the need for separate shielding components, thereby reducing overall device complexity despite the enhanced functionality.
Data Source
AI summary
Insulating films suitable for use in magnet wire, electrical machines, and other applications may include at least one layer formed from extruded material. The extruded material may include a blend of a first polymeric material and a second polymeric material different than the first polymeric material. The first polymeric material may include one of polyetheretherketone, polyaryletherketone, polyetherketoneketone, polyphenylsulfone, polyphenylene sulfide, or polybenzimidazole, and the second polymeric material may include one of polyphenylsulfone, polyetherimide, polyethersulfone, polyphenylene sulfide, polycarbonate, or polyester.