Integrally blow-moulded bag-in-container comprising an inner layer and an outer layer comprising energy absorbing additives, and preform for making it
AssigneeInbev S.A.
InventorsSarah Van Hove, Daniel Peirsman, Rudi Verpoorten
Life of this patent
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Abstract
The present invention relates to an integrally blow-moulded bag-in-container and preform for blow-moulding the bag-in-container. An inner layer and an outer layer are used, wherein the preform forms a two-layer container upon blow-moulding, and wherein the obtained inner layer of said 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.
Claims17
A preform for blow-moulding a bag-in-container, comprising:
- an inner layer and an outer layer, wherein said preform forms a two layer container upon blow-moulding, and wherein the obtained inner layer of said container releases from the obtained outer layer upon introduction of a gas at a point of interface between said two layers;
- and
- at least one of said inner and outer layers includes at least one additive allowing both inner and outer layers to reach their respective blow-moulding temperatures substantially simultaneously upon heating them together in a single oven.
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 said preform forms a two layer container upon blow-moulding, and wherein the obtained inner layer of said container releases from the obtained outer layer upon introduction of a gas at a point of interface between said two layers;
- and
- at least one of said inner and outer layers includes at least one additive allowing both inner and outer layers to reach their respective blow-moulding temperatures substantially simultaneously upon heating them together in a single oven
- heating said preform to blow-moulding temperature in a single oven;
- and
- blow-moulding the thus heated preform to form a bag-in-container;
- wherein the type and amount of additives in at least one of the inner and outer layers of said preform are such that said two layers reach their respective blow-moulding temperatures substantially simultaneously.
A bag-in-container made by the process comprising:
- providing a polymer preform having
- an inner layer and an outer layer, wherein said preform forms a two layer container upon blow-moulding, and wherein the obtained inner layer of said container releases from the obtained outer layer upon introduction of a gas at a point of interface between said two layers;
- and
- at least one of said inner and outer layers includes at least one additive allowing both inner and outer layers to reach their respective blow-moulding temperatures substantially simultaneously upon heating them together in a single oven
- heating said preform to blow-moulding temperature in a single oven;
- and
- blow-moulding the thus heated preform to form a bag-in-container;
- wherein the type and amount of additives in at least one of the inner and outer layers of said preform are such that said two layers reach their respective blow-moulding temperatures substantially simultaneously.
A process comprising using energy absorbing additives or colorants for the substantially simultaneous heating to the respective blow-moulding temperatures of the inner and outer layers of a preform for blow-moulding a bag-in-container.
Dependencies are inferred from the claim text.