Patent ID: 9718258
Date: 2017-08-01
CPC Classifications: B32B

Claim:
1. A multi-layered film having a thickness of about 250 micrometers or less, the film comprising: a first outer layer that contains about 50 wt. % or more of at least one polyolefin; a second outer layer that contains about 50 wt. % or more of at least one polyolefin, wherein the first outer layer, the second outer layer, or both contain a starch polymer and wherein the first outer layer and the second outer layer form outer surfaces of the film; and a core layer that is positioned between the first and second outer layers, wherein the core layer constitutes from about 20% to about 90% of the thickness of the film, wherein the core layer contains from about 10 wt. % to about 95 wt. % of at least one thermoplastic biopolymer and from about 5 wt. % to about 90 wt. % of at least one polyolefin, wherein the polyolefin of the core layer is not a functionalized or modified polyolefin, and wherein the multi-layered film has a modulus of elasticity in the machine direction of from about 50 Megapascals to about 600 Megapascals.