Biaxially oriented polypropylene film to be metallized a metallized biaxially oriented polypropylene film and a laminate formed by using it
AssigneeToray Industries, Inc.
InventorsItsuo Nagai, Shigeru Tanaka
Life of this patent
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Abstract
A biaxially oriented polypropylene film to be metallized, including a surface layer made of a polypropylene resin with the endothermic main peak by crystal fusion in a range of 155 to 163° C. and with a heat of crystal fusion of 20 to 90 J/g, being laminated layer at least on one side of the base layer made of isotactic polypropylene; and the wetting tension of the surface layer, being 33 to 55 mN/m. A metallized biaxially oriented polypropylene film, including a thin metallic film, being laminated on the surface layer of said biaxially oriented polypropylene film to be metallized. A laminate obtained by using said metallized biaxially oriented polypropylene film.
Claims23
A biaxially oriented polypropylene film to be metallized, comprising a surface layer made of a polypropylene resin with the endothermic main peak by crystal fusion in a range of 155 to 163° C. and with a heat of crystal fusion of 20 to 90 J/g, being laminated at least on one side of a base layer made of isotactic polypropylene;
- and the wetting tension of the surface layer, being 33 to 55 mN/m.
A metallized biaxially oriented polypropylene film, comprising a surface layer made of a polypropylene resin with the endothermic main peak by crystal fusion in a range of 155 to 163° C. and with a heat of crystal fusion of 20 to 90 J/g, being laminated at least on one side of a base layer made of isotactic polypropylene;
- a thin metallic film with an optical density of 1.6 or more, being laminated on the surface layer;
- and the adhesive strength between the surface layer and the thin metallic film, being 40 g/cm or more.
A metallized biaxially oriented polypropylene film, comprising a surface layer made of a polypropylene resin with the endothermic main peak by crystal fusion in a range of 155 to 163° C. and with a heat of crystal fusion of 20 to 90 J/g, being laminated at least on one side of a base layer made of isotactic polypropylene;
- a thin metallic film with an optical density of 1.6 or more, being laminated on the surface layer;
- and the wetting tension of the side opposite to the side with the thin metallic film laminated, being 37 mN/m or more.
A metallized biaxially oriented polypropylene film, comprising a surface layer made of a polypropylene resin with the endothermic main peak by crystal fusion in a range of 155 to 163° C. and with a heat of crystal fusion of 20 to 90 J/g, being laminated at least on one side of a base layer made of isotactic polypropylene;
- a thin metallic film with an optical density of 1.6 or more, being laminated on the surface layer;
- and a polyolefin resin with a crystalline melting temperature of 140° C. or lower, being laminated on the side opposite to the side with the thin metallic film laminated.
Dependencies are inferred from the claim text.