	US 11,718,076 B1
	Biodegradable tensioning film and fabrication processes for making same
Boris Miksic, Longboat Key, FL (US); Tim Bliss, Mora, MN (US); and Caleb Pheneger, Roseville, MN (US)
Assigned to Cortec Corporation, White Bear Lake, MN (US)
Filed by Cortee Corporation, White Bear Lake, MN (US)
Filed on Jan. 20, 2022, as Appl. No. 17/579,679.
Claims priority of provisional application 63/142,164, filed on Jan. 27, 2021.
Int. Cl. B32B 27/18 (2006.01); B32B 27/08 (2006.01); B32B 27/36 (2006.01); B29C 48/08 (2019.01); B29C 48/18 (2019.01); C08K 5/00 (2006.01); C08K 3/26 (2006.01); C08K 3/013 (2018.01); C08L 67/02 (2006.01); C08K 3/36 (2006.01); C08K 5/17 (2006.01)

CPC B32B 27/18 (2013.01) [B29C 48/08 (2019.02); B29C 48/18 (2019.02); B32B 27/08 (2013.01); B32B 27/36 (2013.01); B32B 2250/03 (2013.01); B32B 2250/244 (2013.01); B32B 2307/7163 (2013.01); B32B 2307/744 (2013.01); B32B 2307/746 (2013.01); B32B 2307/752 (2013.01); B32B 2367/00 (2013.01); C08K 3/013 (2018.01); C08K 3/36 (2013.01); C08K 5/0008 (2013.01); C08K 5/17 (2013.01); C08K 2003/265 (2013.01); C08L 67/02 (2013.01); Y10T 428/31786 (2015.04)]

26 Claims

1. A multilayer co-extruded film, comprising:

an inner layer positioned at a first surface of the multi-layer film that is intended to be oriented toward an object being wrapped with the film;

an outer layer positioned opposite the inner layer at a second surface of the multi-layer film that is intended to be oriented away from the object being wrapped with the film; and

at least one core layer positioned between the inner layer and the outer layer;

wherein each of the layers is primarily composed of a polymeric material that is biodegradable and compostable;

wherein the inner layer further comprises a cling agent; and

wherein the cling agent comprises a propylene-based elastomer.