COMPOSITE TWO-LAYER PREFORM, METHOD AND DEVICE OF ITS FABRICATION, METHOD OF MAKING BAD-IN-CONTAINER PACKAGE BY BLOW MOULDING AND BAG-IN-CONTAINER PACKAGE THUS MADE Russian patent published in 2012 - IPC B29B11/14 B29C49/22 

FIELD: process engineering.

SUBSTANCE: this invention relates, mainly, to composite two-layer performs suitable for making bag-in-container packages by blow moulding, to method of producing said performs and to bag-in-container package. Proposed preform comprises inner and outer layers. Note here that preform makes two-layer container by blow moulding. Inner layer thus made is separated from outer layer made in a similar way by feeding gas at joint between said layers. Note here that inner layer melting point exceeds or equals that of outer layer.

EFFECT: expanded performances, better quality of containers.

19 cl, 2 dwg, 1 ex