US 12,275,180 B2
Polymeric material for container
David Dezhou Sun, Evansville, IN (US); Philip A. Driskill, Newburgh, IN (US); and Rolland Strasser, Hamden, CT (US)
Assigned to Berry Plastics Corporation, Evansville, IN (US)
Filed by Berry Plastics Corporation, Evansville, IN (US)
Filed on Dec. 28, 2020, as Appl. No. 17/135,048.
Application 17/135,048 is a continuation of application No. 17/005,585, filed on Aug. 28, 2020, granted, now 10,906,228.
Application 17/005,585 is a continuation of application No. 15/713,799, filed on Sep. 25, 2017, granted, now 10,792,851, issued on Oct. 6, 2020.
Application 15/713,799 is a continuation of application No. 14/468,789, filed on Aug. 26, 2014, granted, now 9,931,781, issued on Apr. 3, 2018.
Claims priority of provisional application 61/869,928, filed on Aug. 26, 2013.
Prior Publication US 2021/0114281 A1, Apr. 22, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 49/22 (2006.01); B29C 44/22 (2006.01); B29C 49/00 (2006.01); B29C 49/04 (2006.01); B29K 23/00 (2006.01); B29K 105/00 (2006.01); B29K 105/04 (2006.01); B29L 9/00 (2006.01); B29L 31/00 (2006.01); B65D 81/38 (2006.01)
CPC B29C 49/22 (2013.01) [B29C 44/22 (2013.01); B29C 49/0005 (2013.01); B29C 49/04 (2013.01); B65D 81/3846 (2013.01); B29K 2023/12 (2013.01); B29K 2023/14 (2013.01); B29K 2105/043 (2013.01); B29K 2105/258 (2013.01); B29K 2995/0015 (2013.01); B29K 2995/0063 (2013.01); B29L 2009/00 (2013.01); B29L 2031/712 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A container comprising
a first layer formed from a first formulation comprising polypropylene, and
a core layer comprising an insulative cellular non-aromatic polymeric material formed from a second formulation comprising a first polypropylene resin, a second polypropylene resin, and at least one nucleating agent,
wherein the first layer has been extruded onto the core layer so that the core layer and the first layer are in direct contact,
wherein the first layer has a density of about 0.9 g/cm3,
wherein the first polypropylene resin and the second polypropylene resin together are at least 85 wt % of the insulative cellular non-aromatic polymeric material, and the at least one nucleating agent is up to about 15 wt % of the insulative cellular non-aromatic polymeric material, and
wherein the first formulation is different from the second formulation.