Potable liquid container
AssigneeDS-Chemie GmbH
InventorsTino Kuhn, Georg Schlenk
Life of this patent
Estimating the term…
Abstract
Potable liquid containers including a container, container closure and a closure liner, where the closure liner is formed from a polymeric heterogeneous blend of unvulcanized and uncrosslinked butyl rubber and a thermoplastic polymer are described. The closure liners are used for containers with closures such as a twist crown, a crown cork or a screw cap, for bottles, jars and the like, and more specifically for beer, juice and soft-drink bottles with closures made of metal or plastics.
Claims22
A potable liquid container comprising a container, a container closure and a closure liner formed by placing and in-shell or out-shell molding a molten piece of a poylymer liner compound in the closure, the molded closure liner consisting essentially of a heterogeneous blend of unvulcanized and uncross-linked butyl rubber and of at least one thermoplastic polymer, wherein the heterogeneous blend of the closure liner consists of areas or layers enriched in butyl rubber alternating with areas or layers enriched in thermoplastic polymer, and wherein the thermoplastic polymer is a high-density polyethylene (HDPE) or mixtures of a high-density polyethylene with another polymer selected from polypropylene (PP), polypropylene-copolymers and -terpolymers, poly(ethylene-vinylalcohol) (EVOH) and mixtures thereof.
A potable liquid container comprising a container, a container closure and a closure liner formed by placing and in-shell or out-shell molding a molten piece of a polymer liner compound in the closure, said closure liner consisting essentially of a heterogeneous polymer liner blend of unvulcanized and uncross-linked butyl rubber and high density polyethylene, said closure being capable of preventing ingress of oxygen and volatile off-flavor producing substances into the potable liquid, and being capable of venting gas and/or vapour from the container in the range between 5 and 12 bar.
A potable liquid container comprising a container, a container closure and a closure liner formed by in-shell or out-shell molding a molten piece of a polymer liner compound provided in the closure, said container being a bottle and said closure being a bottle crown, said closure liner consisting essentially of a heterogeneous polymer liner blend consisting of unvulcanized and uncross-linked butyl rubber and high-density polyethylene, wherein said closure liner is not damaged when said crown closure is placed under a headload of up to 60 kg at a temperature of up to 40.degree. C.
A potable liquid container comprising a container, a container closure and a closure liner formed by placing and in-shell molding a molten piece of a polymer liner compound in the closure, said liner compound consisting essentially of a minor amount of unvulcanized and uncross-linked butyl rubber and a major amount of thermoplastic polymer, said liner having a heterogeneous structure comprising areas or layers enriched in butyl rubber and areas or layers enriched in thermoplastic polymer, and a particulate filler material, said filler particles having a platelike flat shape.
Dependencies are inferred from the claim text.