Title:
延伸フイルム用の改良されたプロピレンポリマー
Document Type and Number:
Japanese Patent JP4195095
Kind Code:
B2
Abstract:
This invention relates generally to films made from crystalline polypropylene polymers. Specifically, this invention relates to films comprising crystalline polypropylene polymer compositions containing both propylene homopolymers and propylene copolymers. The compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymers and copolymers using propylene with a small amount of comonomer, preferably ethylene. The resulting polymers are excellent for use in the production of biaxially oriented films. Films prepared with these propylene polymers have a significantly broader processability range and can be evenly stretched at lower temperature compared to films prepared from traditional polypropylene polymers.
Inventors:
Meter, Aspy Kay
Chen, Michael Cheer-Ciao
Rin, Jeong-e
Macalpin, James Jay
Anthony N, Spica
Chen, Michael Cheer-Ciao
Rin, Jeong-e
Macalpin, James Jay
Anthony N, Spica
Application Number:
JP51268698A
Publication Date:
December 10, 2008
Filing Date:
August 25, 1997
Export Citation:
Assignee:
ExxonMobil Chemical Patents, Inc.
International Classes:
C08L23/12; C08F4/642; C08F10/00; C08F10/06; C08F210/06; C08F210/16; C08F297/08; C08J5/18; C08L23/14
Domestic Patent References:
| JP9278909A |
Attorney, Agent or Firm:
Yuzo Yamazaki
Kiko Okada
Kiko Okada