Barrier laminate, heat sealing laminate including barrier laminate, and packaging container with heat sealing laminate
AssigneeDai Nippon Printing Co., Ltd.
InventorsTsuyoshi Suzuki, Shohei Okumura, Shunsuke Furuya, Hideaki Takahashi
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Abstract
[Object] To provide a barrier laminate that includes a multilayer substrate with high interlayer adhesiveness to an evaporated film and that has high gas barrier properties. [Solution] A barrier laminate according to the present invention includes a multilayer substrate and an evaporated film, wherein the multilayer substrate includes at least a polypropylene resin layer and a surface coating layer, the polypropylene resin layer is subjected to a stretching process, the surface coating layer contains a resin material with a polar group, and the evaporated film is composed of an inorganic oxide.
Claims9
A barrier laminate comprising:
- a multilayer substrate;
- an evaporated film;
- and a barrier coating layer on the evaporated film,
- wherein the multilayer substrate includes at least a polypropylene resin layer and a surface coating layer,
- the polypropylene resin layer is subjected to a stretching process,
- the surface coating layer contains a resin material with a polar group,
- the resin material with the polar group is a (meth)acrylic resin with a hydroxy group,
- the evaporated film comprises an inorganic oxide,
- the barrier coating layer is a gas barrier coating film comprising at least one selected from the group consisting of:
- (a) tetraethoxysilane and poly(vinyl alcohol);
- and
- poly (vinyl alcohol) and a hydrolytic condensate of tetraethoxysilane, and
- a ratio of silicon atoms to carbon atoms (Si/C) on a surface of the gas barrier coating film measured by X-ray photoelectron spectroscopy (XPS) is 0.90 or more and 1.60 or less.
Dependencies are inferred from the claim text.