Oil-repellent microvoid-imaging material
US4374889A · kind A · utility
38Cited by
17References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1981 |
| Grant date | Feb 22, 1983 |
| Priority date | — |
| Expiry date | Dec 7, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249978
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Re-usable sheet material, having a dark colored base sheet provided on each side with a microvoid layer, temporarily imageable by application of volatile liquids, is treated on the face side with oleophobic (preferably also hydrophobic) fluorochemicals. Surface contamination of the face side with oil, which would cause permanent transparentization and prevent re-use, is readily removed by placing the face side of the sheet material in contact with the back side. One use for the product is as an order blank in the fast food industry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.