Polypropylene-based wrap film

Details Polypropylene-based wrap film Polypropylene-based wrap film

2008-01-29

2008-01-29

Nakarani, D. S. (Department: 1773)

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

C428S516000, C428S517000, C428S520000, C428S521000, C428S522000, C428S910000

Reexamination Certificate

active

07323240

ABSTRACT:
An object of the invention is to provide a non-chlorine polypropylene wrap film excellent in adhesion, transparency, heat resistance, flexibility, gas barrier properties, touch and cutting properties, and disclosed is a polypropylene wrap film, a multilayer film having a tensile modulus of 200 to 1,000 MPa, containing at least a surface layer and an inner layer having a gas barrier resin, and being stretched into a twice or more length in a machine direction and/or a transverse direction, wherein in its multilayer constitution, the surface layer is constituted by a composition comprising, for example, a mixture of a polypropylene resin, a softening agent, an adhering agent and a liquid adhering assistant at a suitable mixing ratio, and the inner layer is constituted, for example, by an ethylene-vinyl alcohol copolymer resin.

REFERENCES:
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patent: 2002/0102423 (2002-08-01), Shibata et al.
patent: 2003/0099792 (2003-05-01), Andersson et al.
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patent: 7-285200 (1995-10-01), None
patent: 9-154479 (1997-06-01), None
patent: 2000-191803 (2000-07-01), None

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