Transfer belt and image-forming apparatus having the same
View Patent ↗A transfer belt on which a developed toner image is transferred in an electrophotographic process, comprising: a matrix resin; and a chain silicone, contained in the range from 0.5 to 10% by weight to the matrix resin, and an image-forming apparatus provided therewith.
1. A transfer belt on which a developed toner image is transferred in an electrophotographic process, comprising:
a matrix resin; and
a chain silicone, contained in the range from 0.5 to 10% by weight to the matrix resin,
wherein the chain silicone has an weight-average molecular weight of not less than 100,000.
2. The transfer belt of claim 1 , wherein the matrix resin is a thermoplastic resin.
3. The transfer belt of claim 1 , wherein the chain silicone is a chain organopolysiloxane represented by the following formula and a mixture thereof:
in which R 1 to R 10 independently represent a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an aryl group having 6 to 10 carbon atoms; m and n show a ratio of respective monomer unit having n/m of 0 to 100.
4. The transfer belt of claim 3 ,
wherein R 1 to R 3 and R 5 to R 10 are methyl groups, and R 4 is a hydrogen atom, a methyl group or a phenyl group.
5. The transfer belt of claim 1 , wherein a weight-average molecular weight of the chain silicone is in the range from 100,000 to 5,000,000.
6. A transfer belt on which a developed toner image is transferred in an electrophotographic process, comprising:
a matrix resin;
a chain silicone, contained in the range from 0.5 to 10% by weight to the matrix resin;
a surface resistance value of 1×10 8 –1×10 12 Ω/□;
a volume resistance value of 1×10 6 –1×10 11 Ω·cm; and
a ratio r of surface resistance value/volume resistance value of r≧0.1.
7. The transfer belt of claim 1 ,
having a surface roughness of 0.2 μm–0.5 μm.
8. The transfer belt of claim 1 , in which the chain silicone exists at the surface and inside of the transfer belt.
9. A transfer belt on which a developed toner image is transferred in an electrophotographic process, comprising:
a matrix resin; and
a chain silicone, contained in the range from 0.5 to 10% by weight to the matrix resin,
wherein the transfer belt is prepared by extruding a mixture containing the matrix resin and the chain silicone.
10. An image-forming apparatus, comprising:
an image-supporting member on the surface of which electrostatic latent images are to be formed;
a developing device for developing the electrostatic latent images with a toner; and
a transfer belt on which the developed toner images are to be transferred,
the transfer belt comprising:
a matrix resin; and
a chain silicone, contained in the range from 0.5 to 10% by weight to the matrix resin,
wherein the chain silicone has an weight-average molecular weight of not less than 100,000.
11. The image-forming apparatus of claim 10 , wherein the matrix resin is a thermoplastic resin.
12. The image-forming apparatus of claim 10 , wherein the chain silicone is a chain organopolysiloxane represented by the following formula and a mixture thereof:
in which R 1 to R 10 independently represent a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an aryl group having 6 to 10 carbon atoms; m and n show a ratio of respective monomer unit having n/m of 0 to 100.
13. The image-forming apparatus of claim 12 ,
wherein R 1 to R 3 and R 5 to R 10 are methyl groups, and R 4 is a hydrogen atom, a methyl group or a phenyl group.
14. The image-forming apparatus of claim 10 , wherein a weight-average molecular weight of the chain silicone is in the range from 100,000 to 5,000,000.
15. An image-forming apparatus, comprising:
an image-supporting member on the surface of which electrostatic latent images are to be formed;
a developing device for developing the electrostatic latent images with a toner; and
a transfer belt on which the developed toner images are to be transferred,
the transfer belt comprising:
a matrix resin; and
a chain silicone, contained in the range from 0.5 to 10% by weight to the matrix resin, and
wherein the transfer belt has:
a surface resistance value of 1×10 8 –1×10 12 Ω/□;
a volume resistance value of 1×10 6 –1×10 11 Ω·cm; and
a ratio r of surface resistance value/volume resistance value of r≧0.1.
16. The image-forming apparatus of claim 10 ,
wherein the transfer belt has a surface roughness of 0.2 μm–0.5 μm.
17. The image-forming apparatus of claim 10 , wherein the chain silicone exists at the surface and inside of the transfer belt.
18. An image-forming apparatus, comprising:
an image-supporting member on the surface of which electrostatic latent images are to be formed;
a developing device for developing the electrostatic latent images with a toner; and
a transfer belt on which the developed toner images are to be transferred,
the transfer belt comprising:
a matrix resin; and
a chain silicone, contained in the range from 0.5 to 10% by weight to the matrix resin, and
wherein the transfer belt is prepared by extruding a mixture containing the matrix resin and the chain silicone.