ZERO OXYGEN PERMEATION PLASTIC BOTTLE FOR BEER AND OTHER APPLICATIONS

摘要

PURPOSE: A zero oxygen permeation plastic bottle is provided which has oxygen scavenging capacity sufficient to maintain substantially zero or near zero presence of oxygen in the bottle cavity for the planned shelf life of the bottled product under specified storage conditions. CONSTITUTION: A zero oxygen permeation plastic bottle comprises a base which defines the bottom of the bottle cavity and a multilayered, generally cylindrical side wall attached to the base and extending away from the base forming the wall of the bottle cavity and providing necessary volume to the bottle cavity, the side wall terminating so as to define an opening at the top of the bottle cavity suitable for attachment of a bottle cap wherein an inner layer of the side wall is comprised of a copolyester oxygen scavenger formulation comprising predominantly polyester segments and an oxygen scavenging amount of polyolefin oligomer segments. The copolyester comprises from about 2 to about 12 wt % polybutadiene oligomer segments of molecular weight in the range of about 1000 to about 3000 and from about 88 to about 98 wt % polyester segments.