Sheet or web carrying an antistatic layer
US5008178A · kind A · utility
16Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Feb 2, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31993
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A sheet or web material being a subbed or unsubbed hydrophobic resin support or paper support coated with at least one hydrophobic resin layer having at least on one side an outermost antistatic layer containing colloidal silica, characterized in that the antistatic layer is free from any cationic surfactant and consists of at least 70% of weight of colloidal silica having an average particle size smaller thatn 7 nm and a surface area of at least 500 m2 per gram, the colloidal silica being present at a coverage of at least 50 mg per m2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.