Polyimide filament

Polyimide (PI, P84) properties

• Polyimide fiber has good spinnability.
• Polyimide combines warmth retention, antibacterial, far-infrared and other functions.
• Polyimide has excellent thermal stability, and its decomposition temperature is generally around 500°C.
• Polyimide can withstand extremely low temperatures, such as not brittle in liquid helium at -269°C, and has extremely high heat resistance above 450°C.
• Polyimide varieties are insoluble in organic solvents and stable to dilute acids.
• Polyimide has good dielectric properties, with a dielectric constant of about 3.4. Polyimide is a self-extinguishing polymer with low smoke generation rate.
• Due to the low thermal expansion coefficient, the thermal expansion is small and the dimensional stability is high. 

Mechanical properties Comparison of mechanical indexes between polyimide fiber, Vectran and PPTA

Aging resistance Comparison of aging resistance between polyimide fiber and other high performance fiber:

Thermal stability Polyimide heat resistance test:

Glass transition temperature 330℃，5%thermal weight loss 550℃

Applications of polyimide (PI, P84)

1. High-performance aerostats.
2. Optical cable reinforcement and special cables.
3. Marine non-metallic pipelines.
4. High-performance cable sheaths, functional and structurally integrated composite materials.