	US 12,460,057 B2
	Fluororesin film
Kouji Yokotani, Osaka (JP); Nobuyuki Komatsu, Osaka (JP); Takeshi Hazama, Osaka (JP); Mayuko Tatemichi, Osaka (JP); Akio Higaki, Osaka (JP); Tatsuya Higuchi, Osaka (JP); and Keiko Yamazaki, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on May 2, 2022, as Appl. No. 17/734,213.
Application 17/734,213 is a continuation of application No. 16/480,132, granted, now 11,352,469, previously published as PCT/JP2018/001180, filed on Jan. 17, 2018.
Claims priority of application No. 2017-016033 (JP), filed on Jan. 31, 2017.
Prior Publication US 2022/0267540 A1, Aug. 25, 2022
Int. Cl. C08J 5/18 (2006.01); C08L 27/18 (2006.01); H01G 4/18 (2006.01)

CPC C08J 5/18 (2013.01) [C08L 27/18 (2013.01); H01G 4/18 (2013.01); C08J 2327/18 (2013.01); C08J 2427/18 (2013.01); Y10T 428/24355 (2015.01)]

12 Claims

1. 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.