Filler for ink jet recording paper
US5720806A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Sep 27, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a filler for ink jet recording paper which is composed of an amorphous silica containing 0.3-1.0% by weight of Al.sub.2 O.sub.3 and having a BET specific surface area of 250-400 m.sup.2 /g, a mean particle size of 3.6-10.0 .mu.m and a peak position of pore radius as measured by mercury injection method of 37.5-75 angstrom. A coat layer of ink jet recording paper formed of this filler excels not only in true circle property of dots and ink absorbing property when printed by ink jet recording system, but also in surface strength and writing quality. Furthermore, the coating liquid containing this filler has a low viscosity and hence exhibits good coating workability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.