	US 11,890,840 B2
	Laminate structures and flexible packaging materials incorporating same
Peter Hermann Roland Sandkuehler, Zurich (CH); Thomas Galatik, Richterswil (CH); Luis Gerardo Zalamea Bustillo, Richterswil (CH); Jingyi Xu, Shanghai (CN); and Guihong Liao, Shanghai (CN)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/418,059
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Dec. 28, 2018, PCT No. PCT/CN2018/124682 § 371(c)(1), (2) Date Jun. 24, 2021, PCT Pub. No. WO2020/133156, PCT Pub. Date Jul. 2, 2020.
Prior Publication US 2022/0072832 A1, Mar. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 27/08 (2006.01); B32B 7/12 (2006.01); B32B 27/32 (2006.01)

CPC B32B 27/08 (2013.01) [B32B 7/12 (2013.01); B32B 27/32 (2013.01); B32B 2250/03 (2013.01); B32B 2250/242 (2013.01); B32B 2260/046 (2013.01); B32B 2307/306 (2013.01); B32B 2307/31 (2013.01); B32B 2307/516 (2013.01); B32B 2307/518 (2013.01); B32B 2307/72 (2013.01); B32B 2307/732 (2013.01); B32B 2439/02 (2013.01)]

14 Claims

1. A laminate comprising:

a uniaxially oriented first multilayer film comprising ethylene-based polymer having a density from 0.930 to 0.970 g/cm³and a melt index (I₂) from 0.1 to 10 g/10 minutes, wherein the uniaxially oriented first multilayer film is oriented in the machine direction at a draw ratio greater than 3:1 and less than 8:1, and wherein the uniaxially oriented first multilayer film has a ratio of percent elongation at break in the cross direction to percent elongation at break in the machine direction of at least 2 to 1;

a biaxially oriented second multilayer film adhered to the uniaxially oriented first multilayer film and comprising an ethylene-based polymer having a density from 0.900 to 0.962 g/cm³, wherein the biaxially oriented second multilayer film has a cross directional draw ratio larger than its machine direction draw ratio, and wherein the biaxially oriented second multilayer film has a ratio of percent elongation at break in the machine direction to percent elongation at break in the cross direction of at least 2 to 1; and

a third multilayer film adhered to the biaxially oriented second multilayer film such that the biaxially oriented second multilayer film is disposed between the uniaxially oriented first multilayer film and the third film, wherein the third film comprising an ethylene-based polymer having a density from 0.865 g/cm³to 0.935 g/cm³and a melt index (I₂) from 0.5 to 5 g/10 minutes.