Gives the requirements for copolymers of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP), conventionally described as fluoroethylene-propylene (FEP), as films, with or without surface treatment to render the surface cementable and heat sealable, for type 1: General purpose; for type 2A: One side treated; for type 2B: Two sides treated.
IEC 60674-3-7 Ed. 1.0 b:1992
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Specification for plastic films for electrical purposes – Part 3: Specifications for individual materials – Sheet 7: Requirements for fluoroethylene-propylene (FEP) films used for electrical insulation