| 摘要 |
PURPOSE:To obtain a toner capable of providing a fixed picture image having high quality with superior resistance to offsetting and superior fixing characteristics by using a mixture comprising a resin, colorant and a parting agent and using a specified polyester resin, styrene/acrylic copolymer, and xylene/formaldehyde resin for the resin. CONSTITUTION:The toner comprises a resin mixture, colorant, and a releasing agent wherein the resin mixture consists of polyester resin comprising diol component and di- or polyvalent carboxylic acid or a deriv. thereof, styrene/acrylic copolymer contg. alpha,beta-unsatd. ethylenic monomer as constituting unit, and xylene/ formaldehyde resin. Since the toner for heat fixing contains polyester resin and styrene/acrylic resin, the resistance to offsetting and the developing characteristic are superior. Further, the melt viscosity is lowered because xylene/formaldehyde resin is incorporated. Therefore, the offsetting resistance and blocking resistance are improved, and the fixing characteristics are improved as well, and fixed picture image of high quality is obtd. |
