| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve storage stability while maintaining a low fixing temp. and offset resistance by adding a magnetic powder as a dispersant to increase the dispensability of a low melting point wax. SOLUTION: This toner consists of a binder resin, coloring agent and wax and contains a specified amt. of a magnetic powder as a dispersant of the wax. The wax is added to decrease the initiating temp. of melting the toner and to improve the low temp. fixing property. The wax is preferably a low melting point wax. and the melting point of the low melting point wax is preferably 80 to 110 deg.C so as to obtain both of the low temp. fixing property and storage stability. The magnetic powder is added to uniformly disperse the low melting point wax in the binder resin, and is preferably a magnetite or the like. The optimum conditions of the magnetic powder added are that the average particle size is 0.1 to 0.8μm and its amt. is 1 to 10 wt.%. The softening point of the binder resin is preferably 120 to 150 deg.C.</p> |
