Toner, method of producing toner, and image forming method using toner
US6436599B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2001 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jul 12, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a toner comprising a binder resin, a colorant, and a releasing agent wherein the releasing agent has an endothermic starting temperature of 40° C. or more and a melting point of 120° C. or less which are measured using a differential scanning calorimeter, the binder resin contains a linear resin and a non-linear resin, the content of the releasing agent existing at the surface of toner particles is 0 to 30% by weight, and the shape factor MLS2 of the toner particles is from 100 to 130. Preferably a mixture of a linear Polyester and a non linear polyester is used as the binder resin. Preferably the weight average molecular weight of the linear polyester is 2.0×103 to 5.0×104. The toner of the present invention has excellent developing characteristics and transfer characteristics, and superior offset resistance even in an oil-less fixing system. When recording a color image using the toner of the present invention, the resulting image has high quality and the OHP transmittancy is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.