PI – Polyimide
Materials
PI material, (also known as Polyimides) is a type of polymer with repeating units of imide (-CO-N-CO-), which has the advantages of a wide range of applicable temperatures, chemical corrosion resistance, and high strength. Polyimide, as a special engineering material, is widely used today in fields such as aviation, aerospace, microelectronics, nanotechnology, liquid crystals, separation membranes, lasers, and more.
PI plastics exhibit excellent performance on the following aspects:
- Excellent thermal stability, with long-term usability within the temperature range of -269 to 260°C and short-term usage temperatures reaching 400 to 450°C. The onset decomposition temperature is typically around 500°C.
- Good mechanical properties, with the tensile strength of aromatic PI films reaching 250MPa and that of aromatic-aliphatic PI films reaching 530MPa. They have low thermal expansion coefficients, typically ranging from (2 to 3) × 10^(-5) /°C for aromatic types and as low as 10^(-6) /°C for aromatic-aliphatic types.
- Good dielectric properties, with a dielectric constant typically around 3.4, dielectric strength ranging from 100 to 300 kV/mm, volume resistivity of 10^17 Ω·cm, and dielectric loss of 10^(-3).
Yoda Rubber manufacture and supply PI plastic in the following forms:
- Polyimide sheet
- Polyimide rod
- Polyimide tube/sleeve
- Polyimide gaskets
- Bespoke PI parts
