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US 11,479,647 B2Granted
Film including a fluoropolymer
AssigneeDaikin Industries, Ltd.
InventorsTakeshi Hazama, Nobuyuki Komatsu, Kouji Yokotani, Mayuko Tatemichi, Tatsuya Higuchi, Keiko Koga
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Abstract
The invention provides a film having a high relative permittivity, a high volume resistivity, and a high breakdown strength. The film has a relative permittivity of 9 or higher at a frequency of 1 kHz and 30° C., a volume resistivity of 5E+15 Ω·cm or higher at 30° C., and a breakdown strength of 500 V/μm or higher.
Claims7
A film having:
- a relative permittivity of 9 or higher at a frequency of 1 kHz and 30° C.;
- a volume resistivity of 5E+15 Ω·cm or higher at 30° C.;
- and
- a breakdown strength of 500 V/μm or higher,
- wherein the film comprises a fluoropolymer including vinylidene fluoride (VDF) units and tetrafluoroethylene (TFE) units in a VDF/TFE mole ratio of 10/90 to 49/51, and
- wherein the film is obtained by stretching.
3 more elements
Dependencies are inferred from the claim text.