Deep-drawable film
AssigneeAmcor Flexibles Rorschach AG
InventorsPatrik Benz, Tony Malfait
Life of this patent
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Abstract
Deep-drawable packaging film (60, 80, 93, 95) having an aluminum foil (10) as a core layer and comprising on an outer side of the aluminum foil (10) a semi-crystalline PET film (21, 25, 50) that is laminated to the aluminum foil (10) using an adhesive layer (40) and comprising on the other side of the aluminum foil (10) opposite to the PET film (21, 25, 50) a sealing layer (30, 35). The PET film (21, 25, 50) has a degree of crystallization between 20 and 70% and has a Young's modulus of 2000 MPa to 2700 MPa. The PET film (21, 25, 50) is a non-stretched film and the inner side of the PET film (21, 25, 50) directed to the aluminum foil (10) comprises a reverse printing (23).
Claims12
Deep-drawable packaging film suitable for brewing hot drinks and in full compliance with regulations for food packaging, having an aluminum foil as core layer and comprising on an outer side of the aluminum foil a coextruded multilayered film having a first layer of a transparent or semi-transparent, semi-crystalline PET film having a degree of crystallization between 20 and 70% and having a Young's modulus of 2000 MPa to 2700 MPa, a second layer of a pigmented semi-crystalline PET film, the coextruded multilayer film being unstreteched;
- and, a third layer of ink is applied to the coextruded multilayered film on the second layer, wherein the ink is not suitable for direct food contact, the coextruded multilayered film providing a barrier to the migration of ink therethrough and is laminated to the aluminum foil using an adhesive layer, and the deep-drawable packaging film further having a sealing layer on the other side of the aluminum foil opposite to the coextruded multilayered film.
Dependencies are inferred from the claim text.