Gas barrier heat-shrinkable film
OwnerMarina Riccio, Roberto Forloni +1inventors
InventorsMarina Riccio, Roberto Forloni, Felice Ursino
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Abstract
A coextruded annealed gas-barrier heat-shrinkable packaging film suitable for flowpack or tray-lidding applications comprises a core EVOH layer (A), first and second outer polyolefin layers (B) and (C), and at least one inner layer (D) of a copolymer of propylene with butene and optionally also with ethylene, and is characterized by a maximum shrink force in the transverse direction £ 0.35 N/cm and by a residual shrink force in the range 0.11 to 0.22 N/cm. The film is obtained by coextrusion, optional irradiation, orientation and annealing at a temperature of from 70 to 90° C.
Claims16
-15. (canceled)
A coextruded annealed heat-shrinkable packaging film comprising a core layer (A) comprising an ethylene/vinyl alcohol copolymer, a first outer polyolefin layer (B), a second outer polyolefin layer (C), and at least one inner layer (D) of a copolymer of propylene with butene and optionally ethylene, said film comprising a maximum shrink force in the transverse direction of ≦0.35 N/cm.
Dependencies are inferred from the claim text.