Comparison of Key Parameters for Top-Tier High-Temperature Resistant Plastics
Polybenzimidazole (PBI)
- Key Temperature Resistance: Withstands temperatures exceeding 380°C for long periods and up to 760°C briefly; currently the engineering plastic with the highest known heat resistance.
- Additional Characteristics: Combines high strength, resistance to extreme chemical corrosion, and excellent flame retardancy; exhibits no significant performance degradation at high temperatures.
- Application Scenarios: Reserved for extreme environments such as aerospace engine components and specialized high-end fire-resistant parts; extremely high cost and difficult to process; a niche, high-end specialty material.
Polyimide (PI)
- Key Temperature Resistance: Long-term operating temperature of 260–300°C; withstands 400–480°C briefly.
- Additional Characteristics: Exceptional insulation, radiation resistance, and ability to withstand thermal cycling; offers balanced overall performance.
- Application Scenarios: Spacecraft thermal insulation layers, high-temperature sensors, flexible circuit boards, etc.; the most widely used ultra-high heat-resistant plastic in industry.
Polyether Ether Ketone (PEEK)
- Key Temperature Resistance: Long-term resistance to 250°C; short-term peak of 300°C.
- Additional Characteristics: High mechanical strength, wear and hydrolysis resistance, and biocompatibility; offers better cost-performance than PBI and PI.
- Application Scenarios: Automotive engine peripherals, medical implants, precision gears, etc.; a mainstream high-temperature resistant material in high-end industrial sectors.