| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a nonmagnetic toner fit to attain high-speed image formation, to impart high image quality and to make an image full-color and capable of preventing its deterioration and the contamination of an electrifying member over a long period of time without deteriorating fixability. SOLUTION: This nonmagnetic toner contains at least a bonding resin and a colorant. The bonding resin contains satd. and unsatd. polyester resins. The satd. polyester resin has 5-30 mgKOH/g acid value and a wt. average mol.wt. of 5,000-30,000. The unsatd. polyester resin has a wt. average mol.wt. of 3,000-20,000. When the contents (wt.%) of the satd. and unsatd. polyester resins to a polymerizable monomer for synthesizing the bonding resin except the satd. and unsatd. polyester resins are represented by A and B, respectively, the conditions of 0.5<=A<=15, 0.05<=B<=5 and 1.2<=A/B<=100 are satisfied.</p> |
