| 发明名称 |
MULTILAYER BLOWN FILMS |
| 摘要 |
Coextruded multilayer blown films are produced comprising: a core layer comprising at least one random polypropylene copolymer; at least one skin or intermediate layer adjacent to said core layer; wherein the coextruded multilayer film has at least about 30% higher machine direction tear, at least about 30% improved tear ratio (machine direction tear divided by transverse direction tear) and at least about 10% lower film haze, relative to a similar multilayer film comprising at least one impact polypropylene copolymer in the core layer. |
| 申请公布号 |
US2014205847(A1) |
申请公布日期 |
2014.07.24 |
| 申请号 |
US201314134288 |
申请日期 |
2013.12.19 |
| 申请人 |
NOVA Chemicals (International) S.A. |
发明人 |
Falla Daniel J. |
| 分类号 |
B32B27/32;B32B37/16;B29C67/00;B32B37/15;B32B27/08;B29C47/06 |
主分类号 |
B32B27/32 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A coextruded multilayer film comprising: a core layer comprising at least one random polypropylene copolymer; at least one skin or intermediate layer adjacent to said core layer; wherein said coextruded multilayer film has improved machine direction tear, as determined by ASTM D-1922, that is at least about 30% higher compared with a core layer comprising at least one impact polypropylene copolymer. |
| 地址 |
Fribourg CH |
