| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner capable of preventing low-temperature offset, and achieving both low-temperature fixability and heat-resistant storage property.SOLUTION: A toner includes toner particles in a core-shell structure in which a shell phase containing a resin B is formed on the surface of a core containing a binder resin A, colorant, and wax. In flow property measurement of the binder resin A and the resin B by a constant load extrusion type capillary rheometer having the area of a pressure surface of a piston pressing a sample relative to the sample of 1.0 cm, and a diameter of a die hole of 1.0 mm from which the sample is extruded, when the binder resin A is pressed by the piston at a pressure of 5.0 MPa, a temperature at which a time required for the piston to be displaced by 2.0 mm is 10 seconds after the start of application of pressure is denoted by TA, and when the resin B heated to TA is pressed by the piston at a pressure of 5.0 MPa, a time from the start of application of pressure to when the piston is displaced by 2.0 mm is denoted by tB, then TA and tB satisfy a specific relationship. |
