Packaging laminate for a retortable packaging container
AssigneeTetra Laval Holdings & Finance S.A.
InventorsThorbjorn Andersson, Ib Leth
Life of this patent
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Abstract
A packaging laminate for a retortable packaging container can include a core layer; outer, liquid-tight coatings; and an aluminium foil serving as gas barrier between the core layer and one of the two outer liquid-tight coatings. The packaging laminate can include at least one additional layer serving as gas barrier between the core layer and the aluminium foil. The additional gas barrier layer can be bonded to the core layer by an interjacent lamination or adhesive layer.
Claims19
A method of producing a packaging laminate for a retortable packaging container, comprising:
- forming at least one gas barrier layer over a first side of a core layer;
- forming at least one adhesive layer of polypropylene between the first side of the core layer and the at least one gas barrier layer so as to bond the core layer to the at least one gas barrier layer;
- and
- forming a first outer liquid-tight coating over the at least one gas barrier layer.
A method of producing a packaging laminate for a retortable packaging container, comprising:
- forming at least one gas barrier layer of ethylene vinyl alcohol copolymers (EVOH) over a first side of a core layer;
- forming at least one adhesive layer of polypropylene between the first side of the core layer and the at least one gas barrier layer so as to bond the at least one gas barrier layer to the core layer;
- forming an aluminum foil over the at least one gas barrier layer;
- forming a first outer liquid-tight coating over the aluminum foil layer;
- and
- forming a second liquid-tight coating over a second side of the core layer.
Dependencies are inferred from the claim text.