| 摘要 |
PURPOSE: Provided are a toner used for developing electrostatic images in image forming methods, such as electrophotography and electrostatic printing, a heat-fixing method thereof. CONSTITUTION: The toner comprises (i) a binder resin, (ii) a colorant, (iii) a hydrocarbon wax, (iv) a resin composition comprising at least a copolymer unit synthesized by reaction of a styrenic monomer with at least one monomer selected from the group consisting of nitrogen-containing vinyl monomers, carboxyl group-containing monomers, hydroxyl group-containing monomers, acrylate ester monomers and methacrylate ester monomers, and a hydrocarbon unit; and (v) an organometallic compound. The binder resin (i) comprises a polyester component in a proportion of at least 60 wt. % of the binder resin(i). The toner has a molecular weight distribution as measured by gel permeation chromatography (GPC) including a weight-average molecular weight (Mw) of at least 4.0x10 and a ratio Mw/Mn of at least 50 between the weight-average molecular weight (Mw) and a number-average molecular weight (Mn). The heat-fixing method of the toner includes: causing a fixing member to contact a toner image formed on a recording material, and imparting heat and pressure onto the toner image, thereby fixing the toner image onto the recording material.
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