Integrally blow-moulded bag-in-container comprising an inner layer and an outer layer comprising energy absorbing additives, preform for making it and process for producing it
AssigneeAnheuser-Busch InBev S.A.
InventorsSarah Van Hove, Daniel Peirsman, Rudi Verpoorten
Life of this patent
Estimating the term…
Abstract
A preform for an integrally blow-moulded bag-in-container uses an inner layer and an outer layer, wherein the preform forms a two-layer container upon blow-moulding, and wherein the obtained inner layer of the container releases from the thus obtained outer layer upon introduction of a gas at a point of interface between the two layers. At least one of the inner and outer layers includes at least one additive allowing both inner and outer layers to reach their respective blow-moulding temperatures substantially simultaneously.
Claims8
A process for producing a bag-in-container comprising the following steps:
- providing a polymer preform having:
- an inner layer and an outer layer, wherein each of said inner layer and said outer layer consists of a single layer comprising PET, said preform forms a two layer bag-in-container having a body and neck region upon blow-moulding, said bag-in container comprising a vent connecting the interface to the atmosphere and
- wherein the obtained inner layer of said bag-in-container releases from the obtained outer layer upon introduction of a pressurized gas at a point of interface between said two layers in the neck region of the bag-in-container, and
- at least one of said inner and outer layers includes an additive, the additive is selected from the group consisting of energy absorbing additives and colorants;
- heating said preform to blow-moulding temperature in a single oven;
- and
- blow-moulding the heated preform to form the bag-in-container;
- wherein a type and an amount of the additive in the at least one of the inner and outer layers of said preform are such that said two layers reach their respective blow-moulding temperatures simultaneously.
Dependencies are inferred from the claim text.