Title:
MULTI-LAYER ORIENTED POLYPROPYLENE FILMS WITH MODIFIED CORE
Document Type and Number:
WIPO Patent Application WO2004094141
Kind Code:
A3
Abstract:
A multilayer, oriented, polymeric film and the method for its manufacture are provided by the present invention. The film comprises a first and second skin layers, and a core layer comprising isotactic polypropylene, a polymeric modifier, and a hydrocarbon resin. A method for making the film of the present invention includes the steps of coextruding skin layers comprising heat sealable polymers and a core layer comprising isotactic polypropylene, a polymeric modifier, and a hydrocarbon resin; stretching the film in the machine direction, e.g., from about 4 to 7 times at low MDO temperatures; and stretching the film in the transverse direction, e.g., from about 6 to 11 times. Multi-layer clear biaxially shrinkable films with outstanding shrink properties and processability are provided. Additionally, white opaque-cavitated, coated, metallized, colored/tinted, reflective, and phosphorescent biaxially shrinkable films are provided. Furthermore, multilayer non-shrinkable films with very low melting point sealant resins are provided, and are advantaged by the novel combination of film composition of matter and method of manufacture.
Inventors:
MIGLIORINI ROBERT A (US)
LIESTMAN DAVID A (US)
LIESTMAN DAVID A (US)
Application Number:
PCT/US2004/010336
Publication Date:
March 10, 2005
Filing Date:
April 02, 2004
Export Citation:
Assignee:
EXXONMOBIL OIL CORP (US)
MIGLIORINI ROBERT A (US)
LIESTMAN DAVID A (US)
MIGLIORINI ROBERT A (US)
LIESTMAN DAVID A (US)
International Classes:
B32B27/18; B32B27/32; C08L23/10; C08L23/08; C08L23/16; C08L23/20; (IPC1-7): B32B27/32
Domestic Patent References:
| WO2002081205A1 | 2002-10-17 |
Foreign References:
| US5691043A | 1997-11-25 | |||
| US5443895A | 1995-08-22 | |||
| US5019447A | 1991-05-28 | |||
| US4681803A | 1987-07-21 |
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