| 摘要 |
<p>PURPOSE:To obtain an excellent image small in fogging by containing a magnetic powder specified in specific surface area by BET method and a specific ratio of a polyolefin wax containing polyethylene wax. CONSTITUTION:In 100 pts.wt. toner as a whale, 30-75 pts.wt. magnetic powder containing triferric tetraoxide 7.0-30m<2> in specific surface area by BET method and 1.0-6 pts.wt. polyolefin wax containing polyethylene wax or polypropylene wax are contained. A ferroelectric metallic powder such as Ni, Zn, Cu, Co, Fe, Mg, or ferrite Fe, Co or Ni or a metallic compound such as magnetite, gamma-hematite is exemplified as the magnetic powder. The low molecular weight polyethylene wax or polypropylene wax is preferable as the polyolefin wax.</p> |
