Stamping foil
US5077118A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Sep 7, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2839
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A stamping foil comprising: PA1 (a) a biaxially oriented polyester film containing as a first component from 0.01 to 0.5% by weight of spherical silica particles having an average particle diameter of from 0.03 .mu.m and smaller 0.3 .mu.m and a particle diameter ratio defined as a ratio of long diameter/short diameter of from 1.0 to 1.2, and as a second component from 0.002 to 0.2% by weight of spherical silica particles having an average particle diameter of from 0.6 to 3 .mu.m and a particle diameter ratio defined as a ratio of long diameter/short diameter of from 1.0 to 1.2, provided that the content of said second component is the same as or less than the content of said first component, PA1 (b) a release layer provided on one surface of said biaxially oriented polyester film (a), and PA1 (c) a cover layer provided on siad release layer (b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.