	US 12,404,379 B2
	Biaxially oriented polypropylene film
Mahiro Nakano, Inuyama (JP); and Toru Imai, Inuyama (JP)
Assigned to TOYOBO CO., LTD., Osaka (JP)
Appl. No. 18/000,744
Filed by TOYOBO CO., LTD., Osaka (JP)
PCT Filed Jun. 9, 2021, PCT No. PCT/JP2021/021951 § 371(c)(1), (2) Date Dec. 5, 2022, PCT Pub. No. WO2021/256350, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 2020-104871 (JP), filed on Jun. 17, 2020.
Prior Publication US 2023/0212362 A1, Jul. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 5/18 (2006.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 48/21 (2019.01); B29C 55/14 (2006.01); B32B 27/08 (2006.01); B32B 27/32 (2006.01); B29K 23/00 (2006.01)

CPC C08J 5/18 (2013.01) [B32B 27/08 (2013.01); B32B 27/32 (2013.01); B29C 48/0018 (2019.02); B29C 48/08 (2019.02); B29C 48/21 (2019.02); B29C 55/143 (2013.01); B29K 2023/12 (2013.01); B29K 2995/0053 (2013.01); B32B 2250/03 (2013.01); B32B 2250/242 (2013.01); B32B 2307/30 (2013.01); B32B 2307/412 (2013.01); B32B 2307/418 (2013.01); B32B 2307/54 (2013.01); C08J 2323/12 (2013.01)]

16 Claims

1. A biaxially oriented polypropylene film, wherein a stress at 5% elongation (F5) at 23° C. of the biaxially oriented polypropylene film is not lower than 40 MPa in a longitudinal direction and not lower than 160 MPa in a width direction, and a heat shrinkage rate at 150° C. of the biaxially oriented polypropylene film is not higher than 7% in the longitudinal direction and not higher than 16% in the width direction.