Patent ID: 6967070
Filing Date: 2005-11-22
Classification: G03G

Abstract:
1. An electrophotographic toner comprising a binder resin and a colorant, which is used in electrophotographic process employing a flash fixing system for fixation of a transferred toner image, wherein the binder resin is a polyester resin which partially contains a chloroform-insoluble content; the toner contains a polypropylene resin and an ester component represented by the following formula (I): wherein p, q, m and n each represents a positive integer of 16 to 22 and R may be the same or different and each represents a hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms, and the ester component (I) contains, as a principal component, a component which has a molecular weight distribution within a range from 1,200 to 1,500 in a molecular weight distribution as determined by mass spectrometric analysis and also has one peak in the range, while an ionization efficiency of a component having a molecular weight within a range from 1,420 to 1,430 is 45% or more and an ionization efficiency of a component having a molecular weight of 1,350 or less is 10% or more.