Integrally blow-moulded bag-in-container having an inner layer and the outer layer made of the same material and preform for making it

Abstract

The present invention relates to an integrally blow-moulded bag-in-container having an integrally blow-moulded bag-in-container wherein the same polymer is in contact on either side of the interface between the inner and outer layers. It also concerns a preform for blow-moulding a bag-in-container, having an inner layer and an outer layer, wherein the preform forms a two-layer container upon blow-moulding, and wherein the thus 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. The inner and outer layers are the same material.

Dependencies are inferred from the claim text.