Cloth-like polymeric film with directional tear
US7138169B2 · kind B2 · utility
14Cited by
32References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2003 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Mar 5, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/28
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A polymeric film having a plurality of perforations, which are specially structured and arranged is described. The polymeric film provides a strong, high-tensile strength material that permits hand tearing of the film along a desired tear path, providing a controlled tear propagation line. The polymeric film may also be incorporated into a multi-layer film having cloth-like properties of strength and tear propagation, and is suitable for use various adhesive tape applications. Methods of making the polymeric film are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.