| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner for electrostatic latent image development, excellent in low-temperature fixability and heat-resistant storage property.SOLUTION: The toner for electrostatic latent image development comprises at least a first resin and a second resin. The first resin is a crystalline polyester resin, in which the number (1a) of carbon atoms in a dicarboxylic acid unit and the number (1b) of carbon atoms in a dialcohol unit in the first resin are in the ranges of 4≤1a≤12 and 2≤1b≤12, respectively; the second resin is a polyester resin comprising a crystalline segment and an amorphous segment, in which the number (2a) of carbon atoms in a dicarboxylic acid unit and the number (2b) of carbon atoms in a dialcohol unit are in the ranges of 4≤2a≤12 and 2≤2b≤12, respectively; and these numbers satisfy relationships of 0≤|1a-2a|≤2 and 0≤|1b-2b|≤2. The first resin has a weight average molecular weight of 5000 to 100000; the second resin has a weight average molecular weight of 5000 to 60000, and the crystalline segment of the second resin has a weight average molecular weight of 200 to 3000. |
