Invention Grant
- Patent Title: Method of producing polypropylene tapes
- Patent Title (中): 生产聚丙烯带的方法
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Application No.: US10112141Application Date: 2002-03-28
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Publication No.: US06758994B2Publication Date: 2004-07-06
- Inventor: Mohan Gownder , George R. Rowland, Jr. , David Keith Young
- Applicant: Mohan Gownder , George R. Rowland, Jr. , David Keith Young
- Main IPC: B29B1110
- IPC: B29B1110

Abstract:
The present invention relates to a process for making polymer tapes utilizing metallocene catalysts. An isotactic propylene polymer is prepared by polymerizing propylene in the presence of an isospecific metallocene catalyst. The resulting polypropylene is heated, extruded and withdrawn as a sheet. The sheet is then slit longitudinally into tape segments and drawn in the longitudinal direction to a draw ratio of at least about 4.5:1 to produce an oriented tape. It has been found that these polypropylene tapes have different characteristics than those polypropylene tapes produced using Ziegler-Natta catalyst drawn at the same draw ratios.
Public/Granted literature
- US20030183975A1 Method of producing polypropylene tapes Public/Granted day:2003-10-02
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