| 摘要 |
<p>PURPOSE:To provide a toner capable of obtaining a high quality image in a continuous copying for a long period and preventing the generation of soiling and blurring by containing a binding resin and a coloring agent and incorporat ing a specific quantity of a low molecular weight fluororesin having the molecu lar weight of below a specific value. CONSTITUTION:A polymer containing fluorine in the main chain such as a homopolymer of tetrafluoroethylene, trifluoroethylene, vinylidene fluoride, monochloroethylene, hexafluoropropylene or a copolymer of these monomers and a copolymerizable unsaturated bond containing monomer such as ethylene, propylene, butylene, vinyl chloride, vinylidene chloride or the like is used as the low molecular weight fluororesin. The low molecular weight fluororesin having <=20000 molecular weight is used. If the molecular weight is >=20000, the adding effect is decreased. And the adding quantity of fluororesin is 0.1-2.0 pts.wt. per 100 pts.wt. binding resin.</p> |
