ENDLESS BELT, TRANSFER DEVICE, AND IMAGE FORMING APPARATUS

Abstract

An endless belt includes a resin, and particles having an average primary particle diameter of 8 nm or more and 20 nm or less. In a volume frequency distribution of the particles determined by small-angle X-ray scattering measurement, the ratio (area B/area A) of graph area B of a particle diameter region of over 35 nm to graph area A of a particle diameter region of 35 nm or less is 0.3 or less.

Description

Claims

1. An endless belt comprising: a resin; andparticles having an average primary particle diameter of 8 nm or more and 20 nm or less,wherein in a volume frequency distribution of the particles determined by small-angle X-ray scattering measurement, the ratio (area B/area A) of graph area B of a particle diameter region of over 35 nm to graph area A of a particle diameter region of 35 nm or less is 0.3 or less.

2. The endless belt according to claim 1, wherein the resin contains a polyimide resin.

3. The endless belt according to claim 1, wherein the ratio (area B/area A) is 0 or more and 0.05 or less.

4. The endless belt according to claim 2, wherein the ratio (area B/area A) is 0 or more and 0.05 or less.

5. The endless belt according to claim 1, wherein the particles are conductive particles.

6. The endless belt according to claim 2, wherein the particles are conductive particles.

7. The endless belt according to claim 3, wherein the particles are conductive particles.

8. The endless belt according to claim 4, wherein the particles are conductive particles.

9. The endless belt according to claim 5, wherein the conductive particles contain carbon black.

10. The endless belt according to claim 6, wherein the conductive particles contain carbon black.

11. The endless belt according to claim 7, wherein the conductive particles contain carbon black.

12. The endless belt according to claim 8, wherein the conductive particles contain carbon black.

13. The endless belt according to claim 9, wherein the carbon black is basic carbon black.

14. The endless belt according to claim 10, wherein the carbon black is basic carbon black.

15. The endless belt according to claim 11, wherein the carbon black is basic carbon black.

16. The endless belt according to claim 1, wherein among the particle diameters at peaks contained in the graph, the particle diameter at the maximum peak is smallest.

17. The endless belt according to claim 16, wherein the particle diameter at the maximum peak is 8 nm or more and 20 nm or less.

18. A single-layer type endless belt comprising: a resin; andparticles having an average primary particle diameter of 8 nm or more and 20 nm or less,wherein in a cumulative undersize volume distribution of the particles determined by small-angle X-ray scattering measurement, the ratio of the particles having a particle diameter of 35 nm or less is 70% by volume or more.

19. A transfer device comprising: an intermediate transfer body that is the endless belt according to claim 1;a first transfer unit that first transfers a toner image formed on the surface of an image holding member to the surface of the intermediate transfer body; anda second transfer unit that second transfers the toner image transferred to the surface of the intermediate transfer body to the surface of a recording medium.

20. An image forming apparatus comprising: an image holding member;a charging device that charges the surface of the image holding member;an electrostatic latent image forming device that forms an electrostatic latent image on the charged surface of the image holding member;a developing device that houses a developer containing a toner and develops the electrostatic latent image formed on the surface of the image holding member with the developer to form a toner image; andthe transfer device according to claim 19 that transfers the toner image to the surface of a recording medium.