Polyimide – the super engineering plastic from COMCO EPP
16.06.2026
Material
Polyimide (PI) is referred to as a super engineering plastic because its performance characteristics go beyond the range of conventional high-performance thermoplastics. The operating temperature range extends from -269 °C to +400 °C, covering cryogenic environments through to extreme high-temperature processes. For comparison: PEEK operates up to 250 °C, PEI up to 170 °C. Added to this are high wear resistance, a stable friction level, very good electrical insulation and inherently flame-retardant behaviour without additives.
Grades
Polyimide is available in five grades: Polyimide N (natural, unfilled base grade, highest purity), Polyimide G15 (15 percent graphite, self-lubricating), Polyimide G40 (40 percent graphite, maximum dimensional stability and very low thermal expansion), Polyimide MoS (molybdenum disulphide, for dry running in vacuum and oxygen-free environments) and Polyimide ESD (electrostatically dissipative, controlled surface resistance).
Product forms
COMCO EPP supplies polyimide in the precision sheet format 360 x 320 mm and as rods from 2 mm diameter, also suitable for miniature precision components. Cut-to-size blanks and CNC-machined finished parts to drawing are produced in-house.
Applications
Electronics and electrical engineering, aerospace, semiconductor manufacturing, automotive, medical devices, and precision bearing and sliding elements in mechanical engineering and heavy industry.
Technical contact
For material selection, grade choice, cutting or finished-part manufacturing from polyimide, the COMCO EPP engineering team is at your disposal.
More contributions
COMCO EPP manufactures and supplies PPSU, the tough amorphous high-performance plastic with high thermal stability, impact strength and resistance to repeated steam sterilisation. Available in an industrial grade and a medical grade.
COMCO EPP manufactures and supplies PSU, the translucent high-performance plastic with a characteristic amber tint. It combines heat resistance, creep resistance, radiation and sterilisation resistance and is approved for direct food contact.
COMCO EPP manufactures and supplies PEI, the semi-transparent amorphous high-performance plastic with a continuous service temperature of 170 °C, high dielectric strength and steam resistance. From stock, cut-to-size and as a CNC part.