| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a toner improved in low-temperature fixability, heat-resistant storage property, and anti-adhesion property of a discharged sheet.SOLUTION: The toner comprises a binder resin and wax, in which the binder resin comprises a crystalline polyester resin and a non-crystalline polyester resin, and the binder resin contains the non-crystalline polyester resin by 50 mass% or more. The toner satisfies the following expressions (1) to (4): (1) TgA-TgB≥10.0 (°C), (2) TgC-TgB≥5.0 (°C), (3) TgA≥45.0 (°C), and (4) TgC≥40.0 (°C). In the expressions, TgA represents Tg (°C) of the toner; TgB represents Tg (°C) of the toner measured under the conditions that the toner is heated at 150°C, then within 5 seconds after heating is finished, cooled by use of liquid nitrogen, and within one minute after the toner is taken out from the liquid nitrogen, subjected to differential scanning calorimetry; and TgC represents Tg (°C) of the toner measured under the conditions that the toner is heated at 150°C, then within 5 seconds after heating is finished, cooled by use of liquid nitrogen, then maintained at 50°C for 20 minutes, and subjected to differential scanning calorimetry.</p> |
