Patent ID: 7820352
Filing Date: 2010-10-26
Classification: G03G

Abstract:
1. An image forming method comprising the steps of: developing an electrostatic latent image formed on a photoreceptor with a developer comprising a toner to form a toner image and transferring the toner image onto a transfer material and fixing the toner image on the transfer material by a fixing device of a contact heat fixing system, wherein the toner comprises toner particles comprising a resin and a colorant and the resin which comprises a polyester resin and a styrene-acryl copolymer resin is formed by a process comprising (i) allowing a polyvalent carboxylic acid and a polyvalent alcohol to polymerize through polycondensation in the presence of a styrene monomer and an acrylic acid ester monomer in an aqueous medium to form the polyester resin and (ii) allowing the styrene monomer and the acrylic acid ester monomer to polymerize through radical polymerization to form the styrene-acryl copolymer resin to form resin particles comprising the polyester and the styrene-acryl copolymer resin;, wherein in step (i), the styrene monomer and the acrylic acid ester monomer are polycondensable monomers and a content of the poly-condensable monomers is from 10 to 90% by mass, based on the whole of a resin forming composition; the fixing device of a contact heating system comprises a heating roller and a belt-form pressure means.