| 主权项 |
1. A toner comprising a toner particle having a core-shell structure that contains a core and a shell on the core, wherein
the core comprises an amorphous resin A and a crystalline resin, the shell comprises an amorphous resin B, the amorphous resin A comprises a styrene-acrylic resin, a content of the styrene-acrylic resin is at least 50% by mass based on the total mass of the amorphous resin A, a degree of compatibility A between the amorphous resin A and the crystalline resin, calculated with the following formula (X), is at least 50% and not more than 100%
degree of compatibility A (%)=100−(100×ΔH(A))/(ΔH(C)×C/100) (X), and a degree of compatibility B between the amorphous resin B and the crystalline resin, calculated with the following formula (Y), is at least 0% and not more than 40%
degree of compatibility B (%)=100−(100×ΔH(B))/(ΔH(C)×D/100) (Y),wherein, in formulae (X) and (Y),
ΔH(A) represents an exothermic quantity (J/g) of an exothermic peak of a resin mixture A in differential scanning calorimetric analysis, the resin mixture A consisting of the amorphous resin A and the crystalline resin, ΔH(C) represents an exothermic quantity (J/g) of an exothermic peak of the crystalline resin in differential scanning calorimetric analysis, C represents a mass ratio (%) of the crystalline resin in the resin mixture A, ΔH(B) represents an exothermic quantity (J/g) of an exothermic peak of a resin mixture B in differential scanning calorimetric analysis, the resin mixture B consisting of the amorphous resin B and the crystalline resin, and D represents a mass ratio (%) of the crystalline resin in the resin mixture B. |
