	US 12,233,629 B2
	Flexible multilayer film
Kleber Brunelli, Jundiai (BR); and Nicolas Cardoso Mazzola, Jundiai (BR)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/765,069
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Sep. 24, 2020, PCT No. PCT/US2020/052472 § 371(c)(1), (2) Date Mar. 30, 2022, PCT Pub. No. WO2021/067114, PCT Pub. Date Apr. 8, 2021.
Claims priority of provisional application 62/907,853, filed on Sep. 30, 2019.
Prior Publication US 2022/0347984 A1, Nov. 3, 2022
Int. Cl. B32B 27/08 (2006.01); B32B 1/00 (2024.01); B32B 7/12 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); B32B 27/36 (2006.01); B65D 65/40 (2006.01); B65D 81/34 (2006.01)

CPC B32B 27/08 (2013.01) [B32B 1/00 (2013.01); B32B 7/12 (2013.01); B32B 27/306 (2013.01); B32B 27/308 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B32B 27/36 (2013.01); B65D 65/40 (2013.01); B65D 81/3415 (2013.01); B32B 2250/05 (2013.01); B32B 2250/24 (2013.01); B32B 2270/00 (2013.01); B32B 2307/31 (2013.01); B32B 2307/732 (2013.01); B32B 2439/46 (2013.01); B32B 2439/70 (2013.01)]

15 Claims

1. A flexible multilayer film comprising:

at least three layers

a seal layer comprising an ionomer, the seal layer is a surface layer;

a backing layer in direct contact with the seal layer, the backing layer comprising an ethylene/α-olefin multi-block copolymer consisting of (i) ethylene and (ii) a C₄-C₈α-olefin comonomer.