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US 12,460,057 B2Granted
Fluororesin film
AssigneeDaikin Industries, Ltd.
InventorsKouji Yokotani, Nobuyuki Komatsu, Takeshi Hazama, Mayuko Tatemichi, Akio Higaki, Tatsuya Higuchi, Keiko Yamazaki
Life of this patent
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Abstract
A fluororesin film contains a fluororesin. The fluororesin contains two fluororesin species having different composition ratios of polymerized units. The fluororesin film has on at least one surface thereof a ten-point average roughness of 0.100 to 1.200 μm and an arithmetic average roughness of 0.010 to 0.050 μm, and the fluororesin film has a breakdown strength of 400 V/μm or higher.
Claims12
A single layer fluororesin film comprising a fluororesin,
- the single layer fluororesin film having on at least one surface thereof a ten-point average roughness of 0.100 to 1.200 μm and an arithmetic average roughness of 0.010 to 0.050 μm, and the single layer fluororesin film having a breakdown strength of 400 V/μm or higher,
- wherein the fluororesin contains two polymers each containing a polymerized unit based on vinylidene fluoride and having different proportions of a polymerized unit based on vinylidene fluoride, of the two polymers a polymer having a smaller proportion of a polymerized unit based on vinylidene fluoride is present in an amount of 0.1 to 10% by mass relative to the whole fluororesin.
Dependencies are inferred from the claim text.