US 12,420,536 B2
Multilayer body, and package using same
Wakato Tomatsu, Inuyama (JP); Tadashi Nishi, Inuyama (JP); and Tomoya Nishiki, Osaka (JP)
Assigned to TOYOBO CO., LTD., Osaka (JP)
Appl. No. 18/260,877
Filed by TOYOBO CO., LTD., Osaka (JP)
PCT Filed Dec. 16, 2021, PCT No. PCT/JP2021/046571
§ 371(c)(1), (2) Date Jul. 10, 2023,
PCT Pub. No. WO2022/153782, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 2021-005135 (JP), filed on Jan. 15, 2021.
Prior Publication US 2024/0308187 A1, Sep. 19, 2024
Int. Cl. B32B 27/08 (2006.01); B32B 15/088 (2006.01); B32B 15/09 (2006.01); B32B 15/20 (2006.01); B32B 27/34 (2006.01); B32B 27/36 (2006.01); B65D 75/26 (2006.01); B65D 75/58 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 15/088 (2013.01); B32B 15/09 (2013.01); B32B 15/20 (2013.01); B32B 27/34 (2013.01); B32B 27/36 (2013.01); B65D 75/26 (2013.01); B65D 75/5805 (2013.01); B32B 2307/308 (2013.01); B32B 2307/31 (2013.01); B32B 2307/414 (2013.01); B32B 2307/516 (2013.01); B32B 2307/581 (2013.01); B32B 2307/5825 (2013.01); B32B 2439/46 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A multilayer body comprising:
one or more types of base material films; and
a polyolefin-based resin sealant film made from a polyolefin-based resin composition containing a propylene-α-olefin random copolymer, wherein
the following conditions 1) to 3) are satisfied,
1) The one or more types of base material films have orientation angles, a sum of absolute values of which is not smaller than 25 degrees and not larger than 85 degrees,
2) The polyolefin-based resin sealant film has a piercing strength of not lower than 5.0 N and not higher than 15.0 N, and
3) The polyolefin-based resin sealant film has an orientation coefficient ΔNx, in a longitudinal direction, of not smaller than 0.0150 and not larger than 0.0230.