TONER

摘要

A toner includes toner particles each including a core and a shell layer disposed over a surface thereof. The shell layers contain a unit derived from a thermoplastic resin and a unit derived from a monomer or prepolymer of a thermosetting resin. Young's moduli of the shell layers and the cores, as measured using an SPM while raising cantilever temperature thereof, satisfy conditions: X2/X1 is at least 2.0 and no greater than 5.0; and Y2/Y1 is at least 4.0 and no greater than 7.0. X1 denotes a proportion of change of the Young's modulus of the shell layers and X2 denotes a proportion of change of the Young's modulus of the cores from 30° C. to 50° C. Y1 denotes a proportion of change of the Young's modulus of the shell layers and Y2 denotes a proportion of change of the Young's modulus of the cores from 50° C. to 70° C.

主权项

1. A toner comprising
a plurality of toner particles each including:
a core; anda shell layer disposed over a surface of the core, wherein the shell layer contains a unit derived from a thermoplastic resin and a unit derived from a monomer or prepolymer of a thermosetting resin, and a Young's modulus of the core and a Young's modulus of the shell layer, as measured using a scanning probe microscope while raising a cantilever temperature thereof, satisfy conditions:
X2/X1 is at least 2.0 and no greater than 5.0; andY2/Y1 is at least 4.0 and no greater than 7.0, where X1 denotes a proportion of change of the Young's modulus of the shell layer upon raising the cantilever temperature from 30° C. to 50° C., X2 denotes a proportion of change of the Young's modulus of the core upon raising the cantilever temperature from 30° C. to 50° C., Y1 denotes a proportion of change of the Young's modulus of the shell layer upon raising the cantilever temperature from 50° C. to 70° C., and Y2 denotes a proportion of change of the Young's modulus of the core upon raising the cantilever temperature from 50° C. to 70° C.