Electrostatic latent image developing toner, developer, toner cartridge, process cartridge, image forming method, and image forming apparatus
View Patent ↗An electrostatic latent image developing toner includes: a release agent; a pigment; and a binder resin. The content of the pigment is from about 10% by weight to about 50% by weight, the glass transition temperature (Tg) of the toner is in the range of from about −60° C. to about 20° C., and the Young's modulus at 20° C. is in the range of from about 1×10 0 MPa to about 1×10 3 MPa.
1. An electrostatic latent image developing toner comprising:
a release agent;
a pigment; and
a binder resin,
wherein the content of the pigment is from 10% by weight to 50% by weight,
a glass transition temperature (Tg) of the toner is in the range of from −60° C. to 20° C., and
a Young's modulus of the toner at 20° C. is in the range of from 1×10 0 MPa to 1×10 3 MPa.
2. The electrostatic latent image developing toner according to claim 1 ,
wherein the binder resin contains a conjugated diene polymer from 40% by weight to 95% by weight with respect to the entire binder resin.
3. The electrostatic latent image developing toner according to claim 2 ,
wherein a glass transition temperature (Tg) of the conjugated diene polymer is in the range of from −65° C. to −10° C., and a Young's modulus of the conjugated diene polymer at 20° C. is in the range of from 10 −1 MPa to 10 3 MPa.
4. The electrostatic latent image developing toner according to claim 2 ,
wherein the conjugated diene polymer is a styrene-butadiene copolymer.
5. The electrostatic latent image developing toner according to claim 1 ,
wherein the binder resin contains a polyester resin from 5% by weight to 60% by weight of the entire binder resin.
6. The electrostatic latent image developing toner according to claim 5 ,
wherein a glass transition temperature (Tg) of the polyester resin is in the range of from 15° C. to 70° C., and Young's modulus of the polyester resin at 20° C. is in the range of from 10 0.4 MPa to 10 3.7 MPa.
7. The electrostatic latent image developing toner according to claim 1 ,
wherein the pigment is an aluminum powder.
8. The electrostatic latent image developing toner according to claim 1 ,
wherein the pigment content in the electrostatic latent image developing toner is in the range of from 20% by mass to 40% by mass with respect to the entire toner.
9. A developer for developing an electrostatic latent image, comprising:
the electrostatic latent image developing toner according to claim 1 .
10. The electrostatic latent image developing toner according to claim 1 , wherein the toner, when used, is able to form a peelable concealing layer.
11. The electrostatic latent image developing toner according to claim 1 , wherein the binder resin includes an elastomer having a glass transition temperature (Tg) from −65° C. to −10° C. and a Young's modulus at 20° C. from 10 −1 MPa to 10 3 MPa.
12. An image forming method comprising:
charging a surface of an image holding member;
forming an electrostatic latent image on the surface of the image holding member;
developing the electrostatic latent image formed on the surface of the image holding member by using a developer to form a toner image; and
transferring the developed toner image onto a transfer medium,
wherein the developer is the developer for developing the electrostatic latent image according to claim 9 .
13. The image forming method according to claim 12 ,
wherein the binder resin of the electrostatic latent image developing toner contains a conjugated diene polymer from 40% by weight to 95% by weight with respect to the entire binder resin.
14. The image forming method according to claim 13 ,
wherein a glass transition temperature (Tg) of the conjugated diene polymer of the electrostatic latent image developing toner is in the range of from −65° C. to −10° C., and a Young's modulus of the conjugated diene polymer at 20° C. is in the range of from 10 −1 MPa to 10 3 MPa.