Nonoriented stiff packaging film with superior tear properties
US6825276B2 · kind B2 · utility
13Cited by
28References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2002 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Nov 20, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A nonoriented film containing highly crystalline polypropylene, standard polypropylene and nucleating agents. The film has physical properties that are desirable for applications such as food wrappers and tampon overwrap, including good tearability, stiffness and memory. In addition, the nonoriented film is cost effective because the film achieves these physical properties without the step of stretching or orienting the film, as required for conventional polypropylene films used in food wrappers and tampon overwrap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.