US 12,434,459 B2
Barrier laminate and implementations thereof
Hariharan Krishnan Nair, Mumbai (IN); and Gurunath Pozhal Vengu, Bangalore (IN)
Assigned to Hariharan Kirshnan NAIR, Mumbai (IN)
Filed by Hariharan Krishnan Nair, Mumbai (IN)
Filed on Jul. 27, 2022, as Appl. No. 17/875,213.
Application 17/875,213 is a continuation of application No. PCT/IN2021/050952, filed on Oct. 1, 2021.
Claims priority of application No. 202021042871 (IN), filed on Oct. 1, 2020.
Prior Publication US 2022/0363041 A1, Nov. 17, 2022
Int. Cl. B32B 27/08 (2006.01); B32B 1/08 (2006.01); B32B 7/12 (2006.01); B32B 27/32 (2006.01); B32B 37/12 (2006.01); B32B 37/24 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 1/08 (2013.01); B32B 7/12 (2013.01); B32B 27/32 (2013.01); B32B 37/12 (2013.01); B32B 37/24 (2013.01); B32B 2037/243 (2013.01); B32B 2250/242 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2255/28 (2013.01); B32B 2270/00 (2013.01); B32B 2307/72 (2013.01); B32B 2307/7244 (2013.01); B32B 2307/732 (2013.01); B32B 2323/043 (2013.01); B32B 2323/046 (2013.01); B32B 2329/04 (2013.01); B32B 2375/00 (2013.01); B32B 2439/40 (2013.01); B32B 2553/00 (2013.01)] 24 Claims
 
1. A barrier laminate consisting of:
at least one polyolefin core layer selected from the group consisting of high density polyethylene, medium density polyethylene, linear low density polyethylene, ethylene copolymers, polymethyl pentene, and combinations thereof;
a first barrier layer joined to a first side of the at least one polyolefin core layer; and
at least one polyolefin layer adjacent to the first barrier layer,
a second barrier layer joined to a second side of the at least one polyolefin core layer,
wherein the first barrier layer on the first side of the at least one polyolefin core layer is a polyvinyl alcohol (PVOH) coating layer, and has a coating thickness in the range of 0.1 gsm-1.5 gsm,
wherein the barrier laminate is prepared by a blown film process, and
wherein the barrier laminate reduces an oxygen transmission rate (OTR) by 2-15 times of 0.3 to 0.5 cc/m2/day.