Oriented films from improved propylene polymers

Details Oriented films from improved propylene polymers Oriented films from improved propylene polymers

2006-04-11

2006-04-11

Nutter, Nathan M. (Department: 1711)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

C525S240000

Reexamination Certificate

active

07026040

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.

REFERENCES:
patent: 3937762 (1976-02-01), Nahmias et al.
patent: 5118566 (1992-06-01), Wilhelm et al.
patent: 5145819 (1992-09-01), Winter et al.
patent: 5216095 (1993-06-01), Dolle et al.
patent: 5218052 (1993-06-01), Cohen et al.
patent: 5280074 (1994-01-01), Schreck et al.
patent: 5298561 (1994-03-01), Cecchin et al.
patent: 5322902 (1994-06-01), Schreck et al.
patent: 5331054 (1994-07-01), Fujita et al.
patent: 5346925 (1994-09-01), Sugano et al.
patent: 5350817 (1994-09-01), Winter et al.
patent: 5389448 (1995-02-01), Schirmer et al.
patent: 5539056 (1996-07-01), Yang et al.
patent: 5539066 (1996-07-01), Winter et al.
patent: 5548008 (1996-08-01), Asanuma et al.
patent: 5587501 (1996-12-01), Winter et al.
patent: 5700886 (1997-12-01), Winter et al.
patent: 5708090 (1998-01-01), Schreck et al.
patent: 5741563 (1998-04-01), Mehta et al.
patent: 5786291 (1998-07-01), Speca et al.
patent: 5891814 (1999-04-01), Richeson et al.
patent: 6143911 (2000-11-01), Fujita et al.
patent: 6207750 (2001-03-01), Lin et al.
patent: 6806316 (2004-10-01), Mehta et al.
patent: 2105914 (1994-03-01), None
patent: 2133181 (1995-03-01), None
patent: 2142521 (1995-08-01), None
patent: 0 516 019 (1992-12-01), None
patent: 0 310 734 (1994-11-01), None
patent: 0 643 0884 (1995-03-01), None
patent: 0 691 366 (1996-01-01), None
patent: 0 702 030 (1996-03-01), None
patent: 0 704 462 (1996-04-01), None
patent: 0 905 173 (1999-03-01), None
patent: 0 704 463 (1999-07-01), None
patent: WO 98/10016 (1998-03-01), None
patent: WO 98/59002 (1998-12-01), None
patent: WO 99/58587 (1999-11-01), None
patent: WO 01/58970 (2001-08-01), None
A.K. Mehta et al. in 2 Metallocene-Based Polyolefins 463-488 (J. Scheirs & W. Kaminsky eds., John Wiley & Sons 2000), New York.
Abstract for EP 0 516 019 A2—Dec. 2, 1992.
Abstract for EP 0 643 084 A2—Mar. 15, 1995.
Abstract for EP 0 702 030 A1—Mar. 20, 1996.
Olefin Polymers (Polypropylene);: R. B. Leiberman, Encyclopedia of Chem. Technology, 4th Ed., vol. 17, p. 787, (1995), New York.
“Film Applications for Metallocene-based Propylene Polymers,” Mehta, et al, Metallocene-based Polyolefins, vol. 2, p. 21 (2000).
“Physical Constants Of Poly(propylene)*,” R.P. Quirk, et al, Polymer Handbook, 3rd Ed., p. 27, 29, 30, 32 (1989), New York.
“Film, High Density Polyethylene,” M. Bakker, et al, The Wiley Encyclopedia of Packaging Technology, p. 314 (1986), Akron, Ohio.
“Isotactic PP,” E. Albizzati, et al, Polypropylene Handbook, p. 405 and 409, (1996), New York.
The Effect of Aluminum Compounds In The Copolymerization of Ethylene/α-Olefins, Katayama, et al, Macromol. Symp. P. 109-118 (1995), Chiba, Japan.

Affiliated with

Also associated with

Rating

Oriented films from improved propylene polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oriented films from improved propylene polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oriented films from improved propylene polymers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3533540