发明名称 |
POLYOLEFIN/FILLER FILMS HAVING INCREASED WVTR AND METHOD FOR MAKING |
摘要 |
Films, made of polyethylenes and fillers, and articles made therefrom greater WVTR than previously available films based on conventional Zeigler-Natta based polyethylenes. The polyethylenes are produced in a metallocene-catalyzed production process. The films may be made by a cast film process, and may be made in widely varying filler content, generally polyethylene to filler ratios of 30/70 to 70/30. The metallocene based polyethylenes when combined with filler also permit the extrusion of thinner films leading to lighter weight and softer films. The m-polyethylenes utilized for making such films typically have a Composition Distribution Breadth Index above 50 %, a Mw/Mn below 3, and a Mz/Mw below 2.
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申请公布号 |
CA2262364(A1) |
申请公布日期 |
1998.02.12 |
申请号 |
CA19972262364 |
申请日期 |
1997.07.31 |
申请人 |
EXXON CHEMICAL PATENTS INC. |
发明人 |
BRADY, KEVIN A.;MIDDLESWORTH, JEFFREY A. |
分类号 |
B29C55/00;B32B27/20;(IPC1-7):B32B5/02;B32B27/12;A61F13/15 |
主分类号 |
B29C55/00 |
代理机构 |
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