Barrier film, layered body, packaging container, and packaging product
AssigneeToppan Holdings Inc.
InventorsMiki FUKUGAMI, Mikinori YAMADA, Masaki MAEDA
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Abstract
A barrier film includes a base layer containing a polypropylene resin, an anchor coat layer, and an inorganic oxide layer, in this order. The base layer has a contact layer in contact with the anchor coat layer. When softening temperatures of the anchor coat layer and the contact layer are measured by local thermal analysis, a softening temperature T1 of the contact layer is lower than a softening temperature T2 of the anchor coat layer.
Claims20
A barrier film comprising a base layer containing a polypropylene resin, an anchor coat layer, and an inorganic oxide layer, in this order, the base layer having a contact layer in contact with the anchor coat layer,
- wherein, when softening temperatures of the anchor coat layer and the contact layer are measured by local thermal analysis, a softening temperature T1 of the contact layer is lower than a softening temperature T2 of the anchor coat layer.
Dependencies are inferred from the claim text.