| 主权项 |
1. A nonporous dry toner particle consisting essentially of a polymeric binder phase and non-conductive metal oxide particles dispersed within the polymeric binder phase,
wherein: (a) the nonporous dry toner particle has a mean volume weighted diameter (Dvol) before fixing of at least 15 μm and up to and including 40 μm, (b) at least 50 weight % of the total non-conductive metal oxide particles within nonporous dry toner particles have an aspect ratio of at least 5 and an ECD of at least 2 μm and up to and including 50 μm, (c) the non-conductive metal oxide particles are present in an amount of at least 15 weight % and up to and including 50 weight %, based on total nonporous dry toner particle weight, (d) the ratio of the nonporous dry toner particle Dvol to the average equivalent circular diameter (ECD) of the non-conductive metal oxide particles in the nonporous dry toner particles, before fixing, is greater than 0.1 and up to and including 10, (e) the non-conductive metal oxide particles consist essentially of: (i) a silica, alumina, or mica substrate having an outer surface, and (ii) disposed on at least part of the substrate outer surface, one or more layers of an oxide of iron, chromium, silicon, titanium, or aluminum, each of the one or more layers having an average dry layer thickness of at least 30 nm and up to and including 700 nm so that the total average dry thickness of all oxide layers is at least 30 nm and up to and including 1400 nm, and (f) at least one of the layers of an oxide of iron, chromium, silicon, titanium, or aluminum, forms the outermost layer of the non-conductive metal oxide particles. |
