Conductive belt and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsKouichi Uchida, Hiroomi Kojima
Life of this patent
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Abstract
Concerned with a cylindrical conductive belt for electrophotography which has made permanent curl less occur. The conductive belt has a continuous phase containing a thermoplastic polyester resin and discontinuous phases each containing any one or both selected from a polyether-ester amide and a polyether amide, and the discontinuous phases are present in such way as to extend in the peripheral direction of the belt; the belt having a crystallinity that is lower on the outer-peripheral surface side than on the inner-peripheral surface side.
Claims5
A cylindrical conductive belt for electrophotography comprising:
- a continuous phase which comprises a thermoplastic polyester resin;
- and
- discontinuous phases each of which comprises any one or both selected from a polyether-ester amide and a polyether amide,
- the discontinuous phases being present in such a way as to extend in the peripheral direction of the cylindrical conductive belt,
- the extension of the discontinuous phase in the peripheral direction of the cylindrical conductive belt being greater than that in the perpendicular direction of the cylindrical conductive belt,
- a crystallinity of an outer-peripheral surface side of the cylindrical conductive belt being lower than that of an inner-peripheral surface side of the cylindrical conductive belt, and
- the thermoplastic polyester resin being polyethylene naphthalate or polyethylene terephthalate.
An electrophotographic apparatus comprising a cylindrical conductive belt for electrophotography as an intermediate transfer belt, wherein the cylindrical conductive belt is stretched over a drive roller and a tension roller with a stretch-over stress, wherein the cylindrical conductive belt comprises:
- a continuous phase which comprises a thermoplastic polyester resin;
- and
- discontinuous phases each of which comprises any one or both selected from a polyether-ester amide and a polyether amide,
- the discontinuous phases being present in the peripheral direction of the cylindrical conductive belt,
- a crystallinity of an outer-peripheral surface side of the cylindrical conductive belt being lower than that of an inner-peripheral surface side of the cylindrical conductive belt,
- the extension of the discontinuous phase in the peripheral direction of the cylindrical conductive belt being greater than that in the perpendicular direction of the cylindrical conductive belt, and
- the thermoplastic polyester resin being polyethylene naphthalate or polyethylene terephthalate.
Dependencies are inferred from the claim text.