Teflon® FEP CJ 95

For inventory control purposes product name may be followed by an X.

Products labeled FEP CJ 95 and FEP CJ 95 X are equivalent and all information in this document is applicable to both.

Typical Application
Insulation and jacket for Wire and Cable, in applications demanding a high degree of stress crack resistance. Tubes and piping for general and chemical process industry.

DuPont Teflon ® FEP CJ 95 is a melt-processible copolymer of tetrafluoroethylene and hexafluoropropylene without additives that meets the requirements of ASTM D 2116 type I.

It offers the excellent combination of properties characteristic of Teflon ® fluoropolymer resins: non-ageing characteristics, chemical inertness, exceptional dielectric properties, low flammability, heat resistance, toughness and flexibility, low coefficient of friction, non-stick characteristics, negligible moisture absorption and excellent weather resistance. As an intermediate molecular weight resin Teflon ® FEP CJ 95 offers higher processing speeds than many FEP grades with similar high level of stress crack resistance.

Stress crack resistance is an important element in establishing end-use performance. Extensive testing of wire and cable constructions is required for definitive performance evaluation. Experience shows that the MIT folding endurance or flex life test, performed on a thin film of resin, has established a good correlation with extensive cable testing. The higher the MIT
flex life, the higher the stress-crack resistance of the resin. MIT test results should be viewed as a guide to comparative performance of the various grades of resin. We recommend that for applications involving repeated thermal and flex cycling, specific tests on the final cable always should be undertaken. See also DuPont's bulletin "Grade selector for Wire and Cable applications".