Integrally blow-moulded bag-in-container comprising an inner layer and an outer layer comprising energyabsorbing additives, preform for making it and process for producing it

摘要

The present invention relates to an integrally blow-moulded bag-in-container (2) and preform(1, 1′) for blow-moulding the bag-in-container. An inner layer (11) and an outer layer (12) 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 (14) 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.

主权项

1. A preform for blow-molding a dispensing bag-in-container, said preform comprising:
a neck region, a body portion, wherein each of the neck region and the body portion consists of an inner layer and an outer layer, a mouth with a lip defining a perimeter, a vent disposed at the neck region, and said outer layer adjacent to said inner layer forming an interface in the body portion and the neck region, wherein each of said inner layer and said outer layer consists of a single layer comprising PET and one of said inner layer and said outer layer includes an additive allowing both the inner layer and the outer layer to reach their respective blow-molding temperatures substantially simultaneously upon heating said layers together in a single IR oven, said preform, upon blow-molding, forms a two-layer bag-in-container comprising a collapsible inner bag contained in an outer container and an interface therebetween for receiving pressurized gas through said vent to dispense a liquid contained therein.