Laminated film
AssigneeToppan Inc.
InventorHiroki Nakata
Life of this patent
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Abstract
A laminated film in which curl is suppressed when the film is heat-sealed with a material different from that of a substrate, the substrate is made of polyethylene terephthalate; and a sealant laminated on one side of the substrate and being to be sealed with a dissimilar material that is a material different from that of the substrate, wherein, when a laminate including a 100 mm×100 mm square of a portion of the laminated film and an 80 mm×80 mm square of the dissimilar material is placed on a flat surface so that the dissimilar material faces down, the portion of the laminated film including a portion of the substrate and a portion of the sealant, the dissimilar material being heat-sealed on a central portion of the portion of the sealant, each corner of the dissimilar material has a rise height of 20 mm or less.
Claims10
A laminated film, comprising:
- a substrate consisting of polyethylene terephthalate;
- an anchor coat layer on a first surface of the substrate, the anchor coat layer formed by drying a coating liquid comprising aliphatic ester and ethyl ester at a temperature from 50° C. to 80° C., and
- a sealant consisting of an ethylene-methacrylic acid copolymer or an ethylene-acrylic acid copolymer on the anchor coat layer, the sealant layer is configured to be sealed with a dissimilar material that is a material different from the polyethylene terephthalate of the substrate,
- wherein, for a laminate comprising a 100 mm×100 mm square of a portion of the laminated film and an 80 mm×80 mm square of the dissimilar material being placed on a flat surface so that the dissimilar material faces down, the portion of the laminated film including a portion of the substrate and a portion of the sealant, the dissimilar material being heat-sealed on a central portion of the portion of the sealant, each corner of the dissimilar material has a rise height of 20 mm or less, the rise height being a height from the flat surface.
Dependencies are inferred from the claim text.