US 12,233,636 B2
Peelable film for packaging
Eric Johnson, Brazil, IN (US); and Paul Z. Wolak, Indianapolis, IN (US)
Assigned to Berry Plastics Corporation, Evansville, IN (US)
Filed by Berry Plastics Corporation, Evansville, IN (US)
Filed on Jan. 9, 2019, as Appl. No. 16/243,189.
Application 16/243,189 is a division of application No. 13/892,147, filed on May 10, 2013, granted, now 10,464,289.
Claims priority of provisional application 61/645,410, filed on May 10, 2012.
Prior Publication US 2019/0143642 A1, May 16, 2019
Int. Cl. B32B 7/06 (2019.01); A61B 50/00 (2016.01); A61B 50/30 (2016.01); A61M 5/00 (2006.01); B32B 27/10 (2006.01); B32B 27/18 (2006.01); B32B 27/32 (2006.01); A61B 17/00 (2006.01); A61B 17/3201 (2006.01)
CPC B32B 7/06 (2013.01) [A61B 50/00 (2016.02); A61B 50/30 (2016.02); A61M 5/002 (2013.01); B32B 27/10 (2013.01); B32B 27/18 (2013.01); B32B 27/32 (2013.01); A61B 2017/00526 (2013.01); A61B 17/3201 (2013.01); A61B 2050/314 (2016.02); B32B 2270/00 (2013.01); B32B 2307/31 (2013.01); B32B 2307/748 (2013.01); B32B 2439/80 (2013.01); B32B 2553/00 (2013.01); Y10T 428/269 (2015.01)] 14 Claims
OG exemplary drawing
 
1. A package comprising
a substrate comprising a paper having an uncoated sealant side and including paper fibers and
a multilayer film coupled to the substrate to form an article-receiving space located therebetween to receive an article therein, the multilayer film including an exterior layer and a skin layer interposed between the exterior layer and the uncoated sealant side of the paper included in the substrate, wherein the skin layer heat seals directly to the uncoated sealant side of the paper included in the substrate during exposure of the skin layer to heat to trap an article that is present in the article-receiving space between the skin layer and the uncoated sealant side of the paper to cause the uncoated sealant side of the paper to bond to the skin layer to establish a hermetic seal therebetween that surrounds the article-receiving space to retain the article present in the article-receiving space in a hermetically sealed chamber and for unbonding from the uncoated sealant side of the paper included in the substrate in response to application of an external paper-peeling force to the paper to break bonds between the uncoated sealant side of the paper and the skin layer as the uncoated sealant side of the paper is peeled away from the skin layer without separating paper fibers from the uncoated sealant side of the paper and discharging those paper fibers into the article-receiving space so that the article-receiving space and any article in the article-receiving space are uncontaminated by paper fibers associated with the uncoated sealant side of the paper when a consumer separates at least a portion of the uncoated sealant side of the paper from the skin layer of the multilayer film to gain access to an article in the article-receiving space,
wherein the skin layer comprises low density polyethylene (LDPE) and 35% to 45% by weight of polybutene-1 and the skin layer does not contain ethylene vinyl acetate, wherein the multilayer film has a peel seal strength of about 0.5 to about 3.0pounds per inch.