Sublimation transfer toner, method for producing the same, and sublimation transfer dyeing method

摘要

Provided are a toner containing a sublimation dye having good heat-resistant storage stability, a method for producing the toner, and a sublimation transfer dyeing method using the toner. A toner for sublimation transfer comprising toner base particles containing at least a binder resin and a sublimable dye, and an external additive attached to the toner base particles, wherein the toner base particles are fluidized. Surface-modified with inorganic fine particles as an agent, and the external additive adheres to the surface of the surface-modified toner base particles, and the volume-based median diameter D50 of the toner is 4 μm to 10 μm. The glass transition temperature of the toner is 53 ° C. to 70 ° C., the specific surface area of the true sphere at the volume-based median diameter D50 of the toner is A0, and 2 g of the toner sample is added to the surfactant polyoxyethylene (9). An aqueous solution containing 0.5% by mass of lauryl ether and poured into 40 mL of an aqueous solution using an ultrasonic cleaner for 10 minutes at a high-frequency output of 180 W was used for filter paper No. 3 having an opening of 3.0 μm. No. 6 is used, and the residue on the filter paper left for 12 hours is used as a cleaning toner, and when the BET specific surface area of the cleaning toner is A1, the following formula (1) is satisfied. 1.2 A1 / A0 2.6 (1) [Selection] None