| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a positive charge type toner contg. no electrostatic charge controlling agent and excellent in heat resistance, electrostatic chargeabiliyt, low-temp. fixability and image characteristics. SOLUTION: This toner contains a resin binder having 115-125 deg.C softening point and 0-10 KOHmg/g acid value, a high amine value electric charge controlling resin having 50-200 KOHmg/g amine value, 40-55 deg.C glass transition temp. and 90-110 deg.C softening point and a low amine value electric charge controlling resin having 1-20 KOHmg/g amine value, 55-65 deg.C glass transition temp. and 105-115 deg.C softening point. The electric charge controlling resins are contained so that the product of the amt. (pts.wt.) of the high amine value electric charge controlling resin based on 100 pts.wt. of the resin binder and the amine value of the controlling resin is regulated to 100-250 and the product of the amt. (pts.wt.) of the low amine value electric charge controlling resin based on 100 pts.wt. of the resin binder and the amine value of the controlling resin is regulated to 20-70.</p> |
