# US 9,753,411 B2 · Conductive belt and electrophotographic apparatus

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- Number: US 9,753,411 B2
- Document ID: US9753411B2
- Status: Granted
- Kind: B2
- Application number: 14/676,685
- Filed: 2015-04-01
- Published: 2015-07-23
- Granted: 2017-09-05
- Earliest claimed: 2010-02-26
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Kouichi Uchida; Hiroomi Kojima
- Web page: https://patentgrep.com/patent/US9753411B2

## CPC

- G03G 15/1605: {using at least one intermediate support (G03G15/1625 takes precedence)}
- C21D 1/22: Martempering
- C21D 8/02: during manufacturing of plates or strips (C21D8/12 takes precedence)
- C21D 8/0247: characterised by the heat treatment
- C21D 9/46: for sheet metals
- C22C 38/001: {containing N}
- C22C 38/02: containing silicon
- C22C 38/04: containing manganese
- C22C 38/06: containing aluminium
- G03G 15/162: {details of the the intermediate support, e.g. chemical composition}
- B32B 1/08: Tubular products
- B32B 7/00: Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers
- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08L 67/03: the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
- C08L 71/00: Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers
- C08L 71/02: Polyalkylene oxides
- C08L 77/12: Polyester-amides
- C21D 2211/001: Austenite
- C21D 2211/002: Bainite
- C21D 2211/008: Martensite
- G03G 7/00: Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
- G03G 7/0053: {Intermediate layers for image-receiving members}
- G03G 13/14: Transferring a pattern to a second base
- G03G 13/20: Fixing, e.g. by using heat
- G03G 15/14: for transferring a pattern to a second base
- G03G 15/16: of a toner pattern, e.g. a powder pattern {, e.g. magnetic transfer}
- G03G 15/18: of a charge pattern
- G03G 15/20: for fixing, e.g. by using heat
- H01B 1/12: organic substances {(organic macromolecular compounds or compositions C08)}
- H01B 1/20: Conductive material dispersed in non-conductive organic material {(organic macromolecular compounds or compositions C08)}
- Y10T 428/2982: Particulate matter [e.g., sphere, flake, etc.]
- Y10T 428/31504: Composite [nonstructural laminate]
- Y10T 428/31786: Of polyester [e.g., alkyd, etc.]
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B)
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## 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.

## Claims

### Claim 1

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.

### Claim 2 (depends on 1)

The cylindrical conductive belt for electrophotography according to claim 1, wherein the cylindrical conductive belt is an intermediate transfer belt.

### Claim 3 (depends on 1)

The conductive belt according to claim 1, wherein the average aspect ratio of the discontinuous phases in the peripheral direction of the cylindrical conductive belt ranges from 15 to 18.

### Claim 4

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.

### Claim 5 (depends on 4)

The electrophotographic apparatus according to claim 4, wherein the average aspect ratio of the discontinuous phases in the peripheral direction of the cylindrical conductive belt ranges from 15 to 18.