Toner for developing electrostatic image, and image forming method
US5955234A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1997 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Oct 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing an electrostatic image is comprised of a binder resin, a colorant and a wax. The toner has the following rheological characteristics: (a) a temperature at which the ratio of a loss elastic modulus to a storage elastic modulus (G"/G'=tan .delta.) comes to be 1.0 is present in a temperature range of from 55.degree. C. to 70.degree. C., with an elastic modulus being 1.5.times.10.sup.8 Pa or below; (b) the ratio of the storage elastic modulus at a temperature of 40.degree. C. (G'.sub.40) to the storage elastic modulus at a temperature of 50.degree. C. (G'.sub.50), G'.sub.40 /G'.sub.50, is from 1.5 to 5.0; (c) the ratio of the storage elastic modulus at a temperature of 50.degree. C. (G'.sub.50) to the storage elastic modulus at a temperature of 60.degree. C. (G'.sub.60), G'.sub.50 /G'.sub.60, is from 3 to 20; (d) the ratio of the storage elastic modulus at a temperature of 70.degree. C. (G'.sub.70) to the storage elastic modulus at a temperature of 100.degree. C. (G'.sub.100), G'.sub.70 /G'.sub.100, is from 50 to 250; and (e) the ratio of the storage elastic modulus at a temperature of 110.degree. C. (G'.sub.110) to the storage elastic modulus at a temperature of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.