| 发明名称 | Rigid film having high puncture resistance and tear propagation resistance | ||
| 摘要 | The present invention relates to a film and a method for the production thereof, wherein a starting film web comprising at least one layer having a polypropylene content of at least 45% by weight and a polyethylene content in the same layer or in a further layer is produced, the starting film web is heated to the molten state of the polyethylene, yet to below the molten state of the polypropylene and the heated starting film web is passed through a cooled roller nip. | ||
| 申请公布号 | US9238315(B2) | 申请公布日期 | 2016.01.19 |
| 申请号 | US201113575161 | 申请日期 | 2011.01.28 |
| 申请人 | RKW SE | 发明人 | Grefenstein Achim;Brandmaier Florian;Maier Leonhard |
| 分类号 | B32B27/32;B29C43/22;B29C59/04;B29K23/00;B32B37/15;B32B38/06 | 主分类号 | B32B27/32 |
| 代理机构 | Strain & Strain PLLC | 代理人 | Strain Paul D.;Strain & Strain PLLC |
| 主权项 | 1. A film having a secant-E-modulus at 5% elongation, as measured according to ISO 527, of 150-600 N/mm2, a tensile strength according to ISO 527 of 30-70 N/mm2 and a percent elongation at break according to ISO 527 of 400-1200%, comprising at least one layer having a polypropylene content of at least 45% by weight and a polyethylene content in the same layer or in a further layer that is obtained by producing a starting film web, heating the starting film web to the molten state of the polyethylene, but to below the molten state of the polypropylene and passing the heated starting film web through a cooled roller nip. | ||
| 地址 | Frankenthal DE | ||