FIELD: packing and storage.
SUBSTANCE: invention relates to a method of making a container consisting of a rigid outer container and a deformable inner bag by feeding a first thermoplastic to form an outer container with a first screw conveyor and at least second and third thermoplastics to form an inner stack with at least second and third screw conveyors into the extruder, which co-extrudes a workpiece consisting of at least first, second and third layers, located between open halves of the blow mould, which is closed when the workpiece has the length required for making the container. Excess material is squeezed in the bottom part of the manufactured container to form a protrusion from the material of the outer container, in which the bottom weld of the inner bag is clamped. Then, billet is blown by feeding pressurized medium until it abuts on blow mould wall. Second thermoplastic, which forms the outer layer of the inner bag adjacent to the outer container, is a thermoplastic material, which in the hardened state has a rough surface with microscopically small elevations and depressions, as a result of which adhesion forces between the outer container and the inner pack are minimized.
EFFECT: enabling the inner bag to adhere to the outer container without attachment to it, that is mainly without adhesion to it, in the absence of holes made in its wall for pressure equalization.
12 cl, 2 dwg
