Multilayer film for packaging fluid products
AssigneeCryovac, Inc.
InventorsLaura Bellini, Matteo Colaone
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Abstract
Co-extruded multilayer packaging films suitable for packaging fluid products, showing a very good balance of mechanical, chemical and, optionally, barrier properties, good sealability, heat resistance and unexpectedly improved optical properties, a process for their manufacturing, pouches and packages obtained from them, are disclosed. These films comprise a core layer (D) comprising a polyamide; two tie layers (C), directly adhered to the opposite surfaces of the core layer; at least one intermediate layer (B), directly adhered to the opposite surface of a tie layer (C), comprising high density polyethylene; and two outer layers (A) comprising an ethylene/alpha olefin copolymer.
Claims15
-15. (canceled)
A co-extruded multilayer film for packaging fluid products comprising:
- a) a core layer (D) comprising a polyamide;
- b) two tie layers (C), directly adhered to the opposite surfaces of the core layer;
- c) at least one intermediate layer (B), directly adhered to the opposite surface of a tie layer (C), comprising high density polyethylene;
- and
- d) two outer layers (A) comprising an ethylene/alpha olefin copolymer.
The film of claim 1 in which one or more of the layers is cross-linked.
A process for manufacturing a film comprising the steps of:
- a) co-extruding a tubular film comprising a core layer (D) comprising a polyamide, two tie layers (C), directly adhered to the opposite surfaces of the core layer, at least one intermediate layer (B), directly adhered to the opposite surface of a tie layer (C), comprising high density polyethylene, and two outer layers (A) comprising an ethylene/alpha olefin copolymer, through a round die;
- and
- b) quenching said tubular film at a temperature from 5 to 40° C.
A pre-made open pouch made from the film of claim 1.
A package comprising a flowable product and a pouch containing the flowable product, the pouch being made from the film of claim 1.
Dependencies are inferred from the claim text.