Electrostatic charge image developing toner and method of producing the same, electrostatic charge image developer, toner cartridge, process cartridge, and image forming device
View Patent ↗A toner for developing an electrostatic charge image includes: an amorphous polyester resin; a crystalline polyester resin; and a releasing agent, an amount of the releasing agent in the toner being from 5 to 15% by weight; an amount of the releasing agent present at a surface of the toner being from 10 to 35% by weight; and the toner showing at least one endothermic peak in each of a temperature range from 45 to 60° C., a temperature range from 65 to 80° C., and a temperature range from 85 to 100° C. in a temperature-rise process of differential scanning calorimetry of the toner.
1. A toner for developing an electrostatic charge image, comprising:
an amorphous polyester resin;
a crystalline polyester resin; and
a releasing agent,
an amount of the releasing agent in the toner being from about 5 to about 15% by weight;
an amount of the releasing agent present at a surface of the toner being from about 10 to about 35% by weight; and
the toner showing at least one endothermic peak in each of a temperature range from about 45 to about 60° C., a temperature range from about 65 to 80° C. being derived from the crystalline polyester resin, and a temperature
range from about 85 to about 100° C. in a temperature-rise process of differential scanning calorimetry of the toner,
the toner having a shape factor SFI of from 138 to 155.
2. The toner for developing an electrostatic charge image of claim 1 , wherein the amorphous polyester resin comprises at least a polyvalent carboxylic acid component and a polyvalent alcohol component, and the polyvalent carboxylic acid component comprises an alkenyl succinate component.
3. The toner for developing an electrostatic charge image of claim 2 , wherein an amount of the alkenyl succinate component in the amorphous polyester resin is from about 1 to about 35% by weight.
4. The toner for developing an electrostatic charge image of claim 1 , wherein the amorphous polyester resin has a weight average molecular weight from about 15,000 to about 100,000.
5. The toner for developing an electrostatic charge image of claim 1 , wherein an amount of the crystalline polyester resin in the toner is from about 1 to about 40% by weight.
6. The toner for developing an electrostatic charge image of claim 1 , wherein the crystalline polyester resin has a weight average molecular weight of about 10,000 to about 30,000.
7. The toner for developing an electrostatic charge image of claim 1 , wherein the toner has a shape factor of from 142 to 150.
8. A developer for electrostatic charge image development, comprising at least:
the toner for developing an electrostatic charge image of claim 1 .