	US 11,685,144 B2
	Multilayer films and sealed packages made from these films
Robert Clare, Cochrane (CA)
Assigned to NOVA Chemicals (International) S.A., Fribourg (CH)
Filed by NOVA Chemicals (International) S.A., Fribourg (CH)
Filed on Sep. 20, 2022, as Appl. No. 17/949,119.
Application 17/949,119 is a division of application No. 17/407,078, filed on Aug. 19, 2021, granted, now 11,485,122.
Application 17/407,078 is a division of application No. 16/976,816, granted, now 11,148,406, issued on Oct. 19, 2021, previously published as PCT/IB2019/051241, filed on Feb. 15, 2019.
Claims priority of provisional application 62/640,330, filed on Mar. 8, 2018.
Prior Publication US 2023/0022099 A1, Jan. 26, 2023
Int. Cl. B29C 65/18 (2006.01); B32B 27/32 (2006.01); B32B 7/08 (2019.01); B32B 27/08 (2006.01); B29C 65/00 (2006.01); C08F 2/01 (2006.01)

CPC B32B 27/327 (2013.01) [B29C 65/18 (2013.01); B29C 66/1122 (2013.01); B29C 66/71 (2013.01); B29C 66/723 (2013.01); B29C 66/7313 (2013.01); B29C 66/73921 (2013.01); B32B 7/08 (2013.01); B32B 27/08 (2013.01); B32B 2250/05 (2013.01); B32B 2250/246 (2013.01); B32B 2307/72 (2013.01); B32B 2439/40 (2013.01); B32B 2439/70 (2013.01); C08F 2/01 (2013.01)]

17 Claims

1. A stand up pouch comprising:

a first layer and a second layer of a multilayer film wherein the first layer is heat bonded to the second layer, and the multilayer film comprises:

a first skin layer consisting of from 85 to 100 weight % of a high density polyethylene having a density of from 0.95 to 0.97 g/cc and a melt index, I₂, of from 0.5 to 10 g/10 minutes;

a second skin layer consisting of from 85 to 100 weight % of a first linear low density interpolymer having a molecular weight distribution Mw/Mn of from 2.5 to 4.0, a density of from 0.90 to 0.92 g/cc, a melt index, I₂, of from 0.3 to 3 g/10 minutes and a Dilution Index, Yd, of greater than 0°; and

a core comprising medium density polyethylene having a density of from 0.930 to 0.95 g/cc;

with the proviso that the stand-up pouch comprises at least 90% by weight polyethylene; and

wherein, the first layer of multilayer film is heat bonded to the second layer of multilayer film such that the second skin layer of the first layer is in contact with the second skin layer of the second layer.