US 12,384,905 B2
Multi-layer containers
Guido Barion, Sorisole (IT)
Assigned to Greif International Holding B.V., Amstelveen (NL)
Filed by Greif International Holding B.V., Amstelveen (NL)
Filed on Jul. 25, 2017, as Appl. No. 15/659,052.
Claims priority of application No. 16181546 (EP), filed on Jul. 27, 2016.
Prior Publication US 2018/0030253 A1, Feb. 1, 2018
Int. Cl. B32B 1/02 (2006.01); B29C 49/22 (2006.01); B29C 49/42 (2006.01); B32B 7/10 (2006.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); B65D 1/02 (2006.01); C08L 23/04 (2006.01); C08L 23/06 (2006.01); B29C 49/04 (2006.01); B29K 23/00 (2006.01); B29L 31/00 (2006.01)
CPC C08L 23/06 (2013.01) [B29C 49/22 (2013.01); B29C 49/4278 (2013.01); B29C 49/4284 (2013.01); B32B 7/10 (2013.01); B32B 27/08 (2013.01); B32B 27/18 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B65D 1/0215 (2013.01); C08L 23/04 (2013.01); B29C 49/04 (2013.01); B29K 2023/08 (2013.01); B29L 2031/712 (2013.01); B32B 2250/03 (2013.01); B32B 2250/242 (2013.01); B32B 2250/40 (2013.01); B32B 2270/00 (2013.01); B32B 2272/00 (2013.01); B32B 2307/21 (2013.01); B32B 2307/558 (2013.01); B32B 2307/714 (2013.01); B32B 2307/7242 (2013.01); B32B 2439/40 (2013.01); C08L 2201/04 (2013.01); C08L 2203/16 (2013.01); C08L 2205/03 (2013.01); C08L 2205/035 (2013.01); C08L 2205/08 (2013.01); C08L 2207/062 (2013.01); C08L 2207/20 (2013.01); Y02P 70/10 (2015.11)] 19 Claims
 
1. An extruded blow-molded multi-layer container comprising:
an inner layer including a high density polyethylene polymer exhibiting:
a melt flow index ranging between 2-12 g/10 min at 190° C./21.6 Kg,
a yield strength ranging between 23-28 MPa when stretched at 50 mm/min, at 23° C.,
an elongation ranging between 500-700%,
an outer layer including 70%-90% by weight of a high density polyethylene polymer exhibiting:
a melt flow index ranging between 2-12 g/10 min at 190° C./21.6 Kg,
a yield strength ranging between 23-28 MPa when stretched at 50 mm/min, at 23° C.,
a barrier layer disposed between the inner layer and the outer layer, the barrier layer including:
78-92% by weight of a homopolymer or copolymer of ethylene,
3-10% by weight of a polyamide homopolymer,
5-10% by weight of maleic anhydride grafted polyethylene (MAgPE).