FIELD: process engineering.
SUBSTANCE: invention relates to composite "bag-in-container" package 2 made by blow moulding of preform 2, and to appropriate method. Said package 2 has inner layer 21 making the bag and outer layer 22 making the container, and neck communicated inner space with atmosphere. Container comprises, at least, one vent channel 3 in area of joint between inner and outer layers to communicate interlayer space with atmosphere. Note here that, at least, one vent channel 3 extends parallel with connection between aforesaid inner and outer layers to open at point 4 adjoining "bag-in-container" package and aligned with neck.
EFFECT: optimised separation of inner bag from outer container by feeding gas inino connection.
22 cl, 4 dwg
