| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide toner that suppresses occurrence of melt-sticking on a sleeve, suppresses generation of high-temperature offset even in double-sided printing and gives high-quality images on both of top and back faces of a sheet. <P>SOLUTION: The toner contains a binder resin, which contains resin prepared by the reaction of (i) resin (A) having a softening point TA (°C) of 70 to 105°C and having an endothermic peak top temperature of 55 to 120°C and (ii) resin (B) having a softening point TB (°C) of 120 to 160°C and an endothermic peak top temperature of 55 to 120°C. The toner shows, in its viscoelastic characteristics, a storage modulus (G'180) of 3.0×10<SP POS="POST">3</SP>to 3.0×10<SP POS="POST">4</SP>Pa at a temperature of 180°C, at least one peak of a loss tangent tanδ in the range from 50°C to 70°C, a loss tangent [tanδ(T+10)] of 1.0 to 1.5 at a temperature of T+10 (°C), when the peak top temperature of the peak is denoted by T (°C), and a ratio (tanδ(T+10)/tanδ(110)) of 0.8 to 1.5. <P>COPYRIGHT: (C)2012,JPO&INPIT |
