Toner and developer
AssigneeRicoh Company, Ltd.
InventorsTsuyoshi Sugimoto, Hiroshi Yamashita, Daisuke Asahina, Rintaro Takahashi, Masahide Yamada, Shinya Nakayama, Atsushi Yamamoto, Shingo Sakashita
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Abstract
To provide a toner, including at least: a non-crystalline polyester resin; and a crystalline polyester resin, wherein the toner has a glass transition temperature in a first heating Tg1st and a glass transition temperature in a second heating Tg2nd, and a difference between Tg1st and Tg2nd (Tg1st-Tg2nd) is 10° C. or greater, and wherein the crystalline polyester resin is a modified crystalline polyester resin having a urethane skeleton or a urea skeleton, or both thereof.
Claims10
A toner, comprising:
- a non-crystalline polyester resin;
- and
- a crystalline polyester resin,
- wherein the toner has a glass transition temperature in a first heating Tg1st and a glass transition temperature in a second heating Tg2nd, and a difference between Tg1st and Tg2nd (Tg1st-Tg2nd) is 10° C. or greater, and
- wherein the crystalline polyester resin is a modified crystalline polyester resin having a urethane skeleton or a urea skeleton, or both thereof.
A developer, comprising:
- a toner comprising a non-crystalline polyester resin and a crystalline polyester resin,
- wherein the toner has a glass transition temperature in a first heating Tg1st and a glass transition temperature in a second heating Tg2nd, and a difference between Tg1st and Tg2nd (Tg1st-Tg2nd) is 10° C. or greater, and
- wherein the crystalline polyester resin is a modified crystalline polyester resin having a urethane skeleton or a urea skeleton, or both thereof.
An image forming method, comprising:
- forming an electrostatic latent image, wherein an electrostatic latent image is formed on an electrostatic latent image bearing member;
- developing, wherein the electrostatic latent image is developed with a toner to form a visible image;
- transferring, wherein the visible image is transferred on a recording medium;
- and
- fixing, wherein a transfer image transferred on the recording medium is fixed,
- wherein the toner contains a non-crystalline polyester resin, and a crystalline polyester resin,
- wherein the toner has a glass transition temperature in a first heating Tg1st and a glass transition temperature in a second heating Tg2nd, and a difference between Tg1st and Tg2nd (Tg1st-Tg2nd) is 10° C. or greater, and
- wherein the crystalline polyester resin is a modified crystalline polyester resin having a urethane skeleton or a urea skeleton, or both thereof.
Dependencies are inferred from the claim text.