Transparent gas barrier biaxially oriented polypropylene film, a

Details Transparent gas barrier biaxially oriented polypropylene film, a Transparent gas barrier biaxially oriented polypropylene film, a

1998-04-01

2000-08-22

Thibodeau, Paul

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428461, 428516, 428702, 428409, 42725531, B32B 1508, B32B 2732

Patent

active

061069337

ABSTRACT:
A transparent gas barrier biaxially oriented polypropylene film, comprising a base layer mainly composed of a polypropylene polymer, a polyolefin resin layer of 30 to 85 J/g in the heat of fusion formed at least on one side of the base layer, and an imperfectly oxidized alumina layer formed on the polyolefin resin layer, wherein the aluminum metal concentration in the internal portion of the imperfectly oxidized alumina layer is higher than that in the surface of the layer and that in the interface with the polyolefin resin layer, and the aluminum metal content of the imperfectly oxidized alumina layer is kept in a range of 10 to 200% nm. It is a transparent metallized gas barrier biaxially oriented polypropylene film excellent in moisture and oxygen barrier properties and also excellent in the gas barrier properties after elongation.

REFERENCES:
patent: 4345005 (1982-08-01), All et al.
patent: 4364995 (1982-12-01), Crawford et al.
patent: 4430366 (1984-02-01), Crawford et al.
patent: 5399842 (1995-03-01), Watanabe et al.

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