Easily peelable film and medical packaging container
AssigneeNipro Corporation
InventorsShin-ichi Kawamura, Hiroshi Fukushima
Life of this patent
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Abstract
An easily peelable film comprising a mixture of a propylene/α-olefin copolymer (A), a propylene/α-olefin copolymer (B) having an α-olefin content different from that of the copolymer (A), and/or a propylene homopolymer (C) and a medical packaging container produced using the same. The easily peelable film has excellent heat resistance, flexibility, and transparency and further a broad temperature range for low temperature welding at which peelable partition walls can be formed.
Claims6
A medical packaging container comprising a peelable film comprising 90% or more by weight of a mixture of a propylene/α-olefin copolymer (A) and at least one of a propylene/α-olefin copolymer (B) having an α-olefin content different from that of the copolymer (A) and a propylene homopolymer (C), wherein the propylene/α-olefin copolymer (A) has an α-olefin content of 5-20 mol % and a melting point of 110-130° C.;
- the propylene/α-olefin copolymer (B) has an α-olefin content of 8 mol % or less;
- the propylene/α-olefin copolymer (B) and the propylene homopolymer (C) each have a melting point of 130-170° C.;
- a difference between the melting point of (A) and the melting point of (B) and a difference between the melting point of (A) and the melting point of (C) are each at least 5° C.;
- and the mixing ratio by weight of the propylene/α-olefin copolymer (A) to the propylene/α-olefin copolymer (B) and/or the propylene homopolymer (C) is 15-85:85-15.
A medical packaging container comprising a peelable laminated film, wherein said peelable laminated film comprises, as a surface layer, a film comprising 90% or more by weight of a mixture of a propylene/α-olefin copolymer (A) and at least one of a propylene/α-olefin copolymer (B) having an α-olefin content different from that of the copolymer (A) and a propylene homopolymer (C), wherein the propylene/α-olefin copolymer (A) has an α-olefin content of 5-20 mol % and a melting point of 110-130° C.;
- the propylene/α-olefin copolymer (B) has an α-olefin content of 8 mol % or less;
- the propylene/α-olefin copolymer (B) and the propylene homopolymer (C) each have a melting point of 130-170° C.;
- a difference between the melting point of (A) and the melting point of (B) and a difference between the melting point of (A) and the melting point of (C) are each at least 5° C.;
- and the mixing ratio by weight of the propylene/α-olefin copolymer (A) to the propylene/α-olefin copolymer (B) and/or the propylene homopolymer (C) is 15-85:85-15.
Dependencies are inferred from the claim text.