CIRLEX® Data Sheets


DuPontTM CIRLEX® 100% polyimide film has been used successfully in an array of applications due to its stability from temperatures as low as -269°C (-452°F) and as high as 400°C (752°F). CIRLEX® has excellent wear and friction properties,very good electrical and physical properties, and is impervious to most chemicals. Fralock manufactures CIRLEX® to rigorous standards using 100% DuPontTM KAPTON® polyimide composite materials to achieve these high performance characteristics. The glass transition temperature of 351°C provides for exceptional stability and reliability across a broad temperature spectrum.

CIRLEX® benefits designers and users in aerospace, electronics, electrical, semiconductor, and chemical industries, among others, because of its excellent mechanical and electrical properties, dimensional stability, ease of machining, low out gassing characteristics, creep resistance, wear resistance and chemical inertness.



* Stand-offs, Shims & Spacers * Flex Circuit Stiffeners * Flex-to-Board Connectors * Thrust Washers * Seal Rings * Thermal & Electrical Insulators * Strain Relief * Fiber Optics * Gaskets * Microfluidics *


Custom Processing:

Fralock’s custom manufacturing capabilities include foil lamination, machining, drilling, laser cutting, and chemical etching. If you can envision it, we can help you realize it. Contact your Fralock representative at 1-800-372-5625 or request a quote to learn more about Fralock’s advanced capabilities and why we say CIRLEX® is “KAPTON® without limitations.”