Opaque oriented polypropylene film
US6048608A · kind A · utility
9Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1997 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Dec 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/254
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to an opaque, biaxially oriented polymeric film having a thermoplastic polymer matrix material within which is located a stratum of voids. The voids are formed during orientation by a cavitating agent which is a particle of a cyclic olefinic copolymer. The solid particle is phase-distinct and incompatible with the matrix material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.