	US 11,795,282 B2
	Polypropylene film, metal film laminated film using same, and film capacitor
Yasuyuki Imanishi, Otsu (JP); Masatoshi Ohkura, Otsu (JP); and Yuta Nakanishi, Otsu (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 17/268,650
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Aug. 20, 2019, PCT No. PCT/JP2019/032413 § 371(c)(1), (2) Date Feb. 16, 2021, PCT Pub. No. WO2020/040127, PCT Pub. Date Feb. 27, 2020.
Claims priority of application No. 2018-155934 (JP), filed on Aug. 23, 2018; and application No. 2018-155935 (JP), filed on Aug. 23, 2018.
Prior Publication US 2021/0380769 A1, Dec. 9, 2021
Int. Cl. C08J 5/18 (2006.01); B29C 48/88 (2019.01); B29C 48/08 (2019.01); B29C 48/00 (2019.01); B29C 71/02 (2006.01); B29C 71/04 (2006.01); C23C 14/20 (2006.01); H01G 4/32 (2006.01); H01G 4/33 (2006.01)

CPC C08J 5/18 (2013.01) [B29C 48/0018 (2019.02); B29C 48/08 (2019.02); B29C 48/914 (2019.02); B29C 71/02 (2013.01); B29C 71/04 (2013.01); B32B 2457/16 (2013.01); C08J 2323/12 (2013.01); C23C 14/20 (2013.01); H01G 4/32 (2013.01); H01G 4/33 (2013.01)]

15 Claims

1. A polypropylene film, wherein a relationship between a sum (E′135 (MD+TD)) of a storage modulus in a machine direction and a transverse direction of said polypropylene film, as determined by solid viscoelasticity measurement at 135° C., and a sum (E′125 (MD+TD)) of said storage modulus, as determined by solid viscoelasticity measurement at 125° C., satisfies formula (1):

E′135(MD+TD)/E′125(MD+TD)>0.7 (1).