US 12,491,705 B2
Stand up pouch with recycled polyethylene
Robert Clare, Cochrane (CA); Ian Gibbons, Calgary (CA); Daniel Ward, Maineville, OH (US); and Allister Davey, Didsbury (CA)
Assigned to NOVA Chemicals (International) S.A., Fribourg (CH)
Appl. No. 17/761,155
Filed by NOVA CHEMICALS (INTERNATIONAL) S.A., Fribourg (CH)
PCT Filed Sep. 14, 2020, PCT No. PCT/IB2020/058520
§ 371(c)(1), (2) Date Mar. 16, 2022,
PCT Pub. No. WO2021/053492, PCT Pub. Date Mar. 25, 2021.
Claims priority of provisional application 62/903,109, filed on Sep. 20, 2019.
Prior Publication US 2023/0347629 A1, Nov. 2, 2023
Int. Cl. B32B 27/08 (2006.01); B32B 7/02 (2019.01); B32B 27/18 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B65D 75/00 (2006.01); B65D 75/26 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 7/02 (2013.01); B32B 27/18 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); B65D 75/008 (2013.01); B65D 75/26 (2013.01); B32B 2250/24 (2013.01); B32B 2270/00 (2013.01); B32B 2272/00 (2013.01); B32B 2307/31 (2013.01); B32B 2307/72 (2013.01); B32B 2307/7244 (2013.01); B32B 2307/7246 (2013.01); B32B 2307/748 (2013.01); B32B 2439/46 (2013.01); B32B 2439/70 (2013.01); Y02W 30/80 (2015.05)] 20 Claims
OG exemplary drawing
 
1. A laminated structure that is made from polymeric materials, said laminated structure comprising:
A) an outer web comprising:
A.1) a first-A layer comprising an HDPE composition, and
A.2) a second-A layer comprising polyethylene chosen from LLDPE, MDPE, and HDPE;
B) an inner web comprising:
B.1) a first-B layer that is in contact with said outer web, wherein said first-B layer comprises polyethylene chosen from LLDPE and MDPE,
B.2) a second-B layer comprising recycled polyethylene, and
B.3) a sealant structure comprising:
B.3.1) a sealant skin layer comprising a polyethylene sealant, and
B.3.2) a layer adjacent to said sealant skin layer comprising a polyethylene having a density that is a) higher than the density of said polyethylene sealant; and b) lower than the density of the second-B layer, wherein said layer adjacent to said sealant skin layer comprises recycled linear low density polyethylene and the second-B layer is in contact with said layer adjacent to said sealant skin layer; and
wherein
I) said outer web is laminated to said inner web, and
II) said HDPE, MDPE, LLDPE, recycled polyethylene and polyethylene sealant collectively form at least 95 weight % of said polymeric materials that are used to prepare said laminated structure.