WO2004060998A1 - 導電性樹脂組成物、及びこれを用いた感光ドラム用基体並びに感光ドラム - Google Patents
導電性樹脂組成物、及びこれを用いた感光ドラム用基体並びに感光ドラム Download PDFInfo
- Publication number
- WO2004060998A1 WO2004060998A1 PCT/JP2002/013646 JP0213646W WO2004060998A1 WO 2004060998 A1 WO2004060998 A1 WO 2004060998A1 JP 0213646 W JP0213646 W JP 0213646W WO 2004060998 A1 WO2004060998 A1 WO 2004060998A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin composition
- photosensitive drum
- conductive
- conductive resin
- substrate
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K11/00—Use of ingredients of unknown constitution, e.g. undefined reaction products
Definitions
- the present invention relates to a conductive resin composition, a substrate for a photosensitive drum using the same, and a photosensitive drum. More specifically, the present invention relates to a conductive resin composition which is easy to mold and has excellent dimensional stability, a photosensitive drum substrate using the same, and a photosensitive drum using the substrate. You.
- an electrophotographic process such as an electrophotographic device such as a copier, a facsimile, a printer, or an electrostatic recording device
- a photoconductive substance for example, ZnO, CdS, Se, OPC (organic Semiconductor), amorphous silicon (a-Si), etc.
- the surface of the photosensitive drum having a layer is uniformly charged, and an image is projected from the optical system onto the surface of the photosensitive drum to eliminate the charge of the portion irradiated with light.
- To form an electrostatic latent image and then supply toner to the electrostatic latent image to form a toner image by electrostatic adhesion of the toner.
- the toner image is formed on a recording medium such as paper, OHP paper, or photographic paper.
- a recording medium such as paper, OHP paper, or photographic paper.
- an aluminum alloy is made of a cylindrical or columnar material because it is relatively lightweight, has excellent machinability, and has good conductivity. What had been processed to be used.
- aluminum A resin base made by injection molding a conductive resin composition in which a thermoplastic resin such as polyamide resin is mixed and dispersed with a conductive agent such as carbon black is used. I have.
- This resin base can be molded integrally with the base body, such as flanges and gears, has low vibration and low noise, has low charge leakage, has moderate potential attenuation characteristics, and has recyclability. It has the advantages of being improved.
- the photosensitive drum requires high dimensional accuracy such as inner and outer diameter accuracy, straightness, and roundness due to its function, and the performance is maintained under all use conditions in a wide temperature range or a wide humidity range. Although it is necessary, at present, the dimensional accuracy tends to decrease particularly in a high-temperature, high-humidity use environment, and it is difficult to obtain a sufficiently satisfactory product. Disclosure of the invention
- the present inventors have conducted intensive studies on the development of a photosensitive drum substrate having excellent functions and a resin composition applied to the photosensitive drum, and as a result, by using a polyester resin as the base resin, Was found to be able to achieve.
- the present invention has been completed based on such findings.
- the present invention provides a thermoplastic conductive resin composition to which a conductive agent is added, wherein the base resin comprises a polyester resin.
- the present invention provides an electrically conductive resin composition.
- the present invention provides a resin substrate for a photosensitive drum used in an electrostatic recording process such as an electrophotographic process, wherein the substrate comprises the conductive resin composition described above. To provide.
- the present invention also provides a photosensitive drum having a photosensitive layer on the photosensitive drum substrate.
- the base resin contains a polyester resin.
- the photosensitive drum substrate of the present invention can be produced by forming a conductive resin composition into a predetermined cylindrical or cylindrical shape by a known method, for example, an injection molding method or an extrusion molding method. Injection molding is particularly preferred.
- polyester resin those obtained by reacting an aromatic dicarboxylic acid with an aliphatic amine are preferred.
- PBT polyethylene terephthalate
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PPT Polypropylene terephthalate
- polybutylene terephthalate, polyethylene terephthalate or polyethylene naphthalate is preferred.
- base polyester resin In addition to the base polyester resin, other resins, additives, lubricants, etc. may be used as appropriate for the purpose of improving impact strength, fluidity, processability, etc. Can be blended.
- the other resin is not particularly limited, but it is preferable to mix a polyamide resin such as nylon 6 or nylon 66 from the viewpoint of improving moldability and low cost.
- a polyamide resin such as nylon 6 or nylon 66 from the viewpoint of improving moldability and low cost.
- the low hygroscopic resin for example, polypropylene, polyphenylene ether, polyphenylene phenol, etc. can be blended.
- the additives include various types of elastomers such as polyester-based elastomers (eg, polyester-polyether copolymer) and polyolefin-based elastomers (eg, ethylene-propylene terpolymer), sodium stearate, and the like.
- elastomers such as polyester-based elastomers (eg, polyester-polyether copolymer) and polyolefin-based elastomers (eg, ethylene-propylene terpolymer), sodium stearate, and the like.
- Metallic stones such as sodium montanate, and amide-based lubricants such as stearic acid amide and alkyl-based bisamide can be used.
- the above various elastomers have an effect as an impact modifier, and the above metal lithography, amide-based lubricant, etc. have an effect as a fluidity / workability improver.
- the resulting conductive resin composition tends to have reduced mechanical properties such as water absorption, chemical resistance, flexural modulus, and impact strength.
- 100 parts by weight or less preferably 100 parts by weight or less, especially 30 parts by weight or less in the case of other resins, and 50 parts by weight in the case of a flowability improver.
- the compounding ratio is particularly preferably 20 parts by weight or less.
- the conductive agent used in the conductive resin composition of the present invention is not particularly limited as long as it can be uniformly dispersed in the resin component.
- Examples thereof include carbon black, graphite, and aluminum, copper, and nickel. And the like, and conductive glass powder and the like. Among them, carbon black is preferable.
- the amount of the conductive agent is based on 100 parts by weight of the resin. Preferably, it is selected in the range of 5 to 40 parts by weight, more preferably 20 to 35 parts by weight. When the amount of the conductive agent increases, mechanical properties such as impact strength tend to decrease. When the amount of the conductive agent decreases, sufficient development of desired conductivity may become difficult.
- the conductive resin composition of the present invention may contain a filler such as various fibers and whiskers, if desired.
- a filler such as various fibers and whiskers, if desired.
- the filler include conductive fillers such as carbon fibers, conductive whiskers, and conductive glass fibers, and non-conductive fillers such as glass fibers.
- fibrous silicates such as calcium and potassium titanates, silicon carbide, silicon nitride, magnesium oxide, potassium titanate, aluminum hydroxide, etc.
- Ordinary whisker fiber can be used.
- the fibrous filler of calcium silicate is particularly preferred for its wisdom.
- calcium silicate as a fibrous filler can be obtained, for example, as “Walathtonite”. This wallastonite is a fine fibrous white powder with an average diameter of 6 to 25 ⁇ m, which is obtained by crushing and refining a natural mineral, Cyanite.
- a silane-based coupling agent such as aminosilane, epoxysilane, ureidosilane, or butylsilane, or a titanate-based coupling agent may be blended or the inorganic filler may be used in advance.
- a force-applying material By treating the surface with such a force-applying material, the affinity with the resin can be increased and used.
- the amount of the filler is not particularly limited, and is appropriately selected according to the type of the filler, the length and the diameter of the fiber, and the like. It is selected in the range of 10 to 50 parts by weight, more preferably 25 to 45 parts by weight.
- Mechanical properties such as impact strength with more filler
- the mechanical properties such as flexural strength and flexural modulus tend to decrease.
- the conductive resin composition according to the present invention has a water absorption rate measured according to ASTM D-570 as the water absorption rate when left standing for 24 hours in an environment at a temperature of 50 ° C. and a relative humidity of 90%. Is preferably less than 1.0%, more preferably 0.5% or less, particularly preferably 0.2% or less.
- the shape of the photosensitive drum substrate of the present invention is preferably a cylindrical shape or a columnar shape in that an image can be easily formed on a recording medium by rotation.
- the method for molding the substrate is not particularly limited, and includes, as described above, an injection molding method, an extrusion molding method, and the like, with the injection molding method being particularly preferred. Molding conditions, such as molding temperature and injection pressure, are appropriately selected according to the type of resin component constituting the base.
- the physical properties of the outer peripheral surface of the resin substrate for a photosensitive drum of the present invention are not particularly limited, but the surface roughness is not more than 0.8 ⁇ m in center line average roughness Ra, particularly 0.2 ⁇ m. m, maximum height Rm a X: 1.6 m or less, especially 0.8 ⁇ or less, 10 point average roughness 12: 1.6 ⁇ or less, especially 0.8 ⁇ m or less Is preferred.
- R a, R max, and R z increase, irregularities on the surface of the resin substrate appear on the photosensitive layer of the photosensitive drum, which may cause image defects.
- the photosensitive drum of the present invention is mounted on a high-speed image forming apparatus, and comprises a photosensitive layer and other layers as necessary, such as an undercoat layer and a protective layer, on the resin substrate for a photosensitive drum of the present invention. It has a layer and the like.
- the photosensitive layer It is preferable to use a layer having at least a charge generation layer and a charge transport layer.
- the charge generation layer can be composed of, for example, a charge generation compound and a binder resin.
- the charge generating compound is not particularly limited and may be appropriately selected from known compounds used in a charge generating layer of a photoreceptor, and examples thereof include various inorganic conductive compounds and organic conductive compounds. Can be Among them, compounds having high charge generating ability are preferable.
- the binder resin is not particularly limited, and may be appropriately selected from known resins conventionally used for a charge generation layer of a photoreceptor. This charge generation layer can be formed by a known method such as coating or vapor deposition.
- the charge transport layer preferably has a non-uniform charge transport layer and a uniform charge transport layer.
- the heterogeneous charge transport layer is not particularly limited, but may be a particle-dispersed non-uniform charge transport layer or a phase separation layer. A non-uniform charge transport layer is preferred.
- the heterogeneous charge transporting layer can be formed by dispersing a material to be contained in the heterogeneous charge transporting layer, such as a polymer material, in a solvent, and by a known method such as coating.
- the uniform charge transport layer is not particularly limited, but is preferably a layer containing a polymer compound having high charge transport ability and excellent film formability.
- the uniform charge transport layer can be formed by dispersing a material to be contained in the uniform charge transport layer, such as the polymer material, in a solvent, and by a known method such as coating.
- the water absorption of the resin composition and the outer shape change of the photosensitive drum substrate were determined according to the following methods.
- the sample was left for 24 hours in an environment at a temperature of 50 ° C and a relative humidity of 90%, and The water absorption at this time was measured according to ASTM D-570.
- the outer diameter (A) of the end of each drum substrate manufactured as described below was measured, and the outer diameter (B) after standing for 24 hours in an environment of 50 ° C and a relative humidity of 90% was measured again.
- the measured value was calculated by dividing the amount of change in outer diameter before and after standing [(B)-(A)] by (A) and expressed as a percentage.
- the conductive resin composition was prepared using a twin screw extruder according to the composition shown in Table 1 Then, the water absorption (%) was measured by the above method. The results are shown in Table 1.
- PA 66 Nylon 66 [Ube Industries, Ltd., trademark “UBE Nylon”]
- P BT Polybutylene terephthalate [Wintech Polymer Co., Ltd. Made, trademark "Tijin PBT”]
- PET Polyethylene terephthalate [Mitsubishi Rayon Co., Ltd., trademark "Dianite”]
- PEN Polyethylene naphthalate [Tijin Co., Ltd., trademark "PEN resin”]
- Carbon black Furnace carbon black [Asahi Carbon Co., Ltd., trademark "Asahi A X-015"]
- a conductive resin composition having excellent dimensional stability can be obtained, and therefore, weight reduction can be easily achieved without lowering mechanical strength, workability, dimensional accuracy, and the like.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photoreceptors In Electrophotography (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN02830117.XA CN1720292A (zh) | 2002-12-26 | 2002-12-26 | 导电性树脂组合物、使用该组合物的感光鼓用基体及感光鼓 |
US10/540,559 US20060151751A1 (en) | 2002-12-26 | 2002-12-26 | Conductive resin composition, base for photosensitive drum using the composition, and photosensitive drum |
PCT/JP2002/013646 WO2004060998A1 (ja) | 2002-12-26 | 2002-12-26 | 導電性樹脂組成物、及びこれを用いた感光ドラム用基体並びに感光ドラム |
AU2002361104A AU2002361104A1 (en) | 2002-12-26 | 2002-12-26 | Conductive resin composition, base for photosensitive drum using the composition, and photosensitive drum |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/013646 WO2004060998A1 (ja) | 2002-12-26 | 2002-12-26 | 導電性樹脂組成物、及びこれを用いた感光ドラム用基体並びに感光ドラム |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004060998A1 true WO2004060998A1 (ja) | 2004-07-22 |
Family
ID=32697307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/013646 WO2004060998A1 (ja) | 2002-12-26 | 2002-12-26 | 導電性樹脂組成物、及びこれを用いた感光ドラム用基体並びに感光ドラム |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060151751A1 (ja) |
CN (1) | CN1720292A (ja) |
AU (1) | AU2002361104A1 (ja) |
WO (1) | WO2004060998A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8729164B2 (en) * | 2011-10-11 | 2014-05-20 | Basf Se | Thermoplastic molding composition and moldings produced therefrom with improved wear resistance |
JP5358732B1 (ja) * | 2012-11-16 | 2013-12-04 | 太陽インキ製造株式会社 | 導電回路形成用導電性樹脂組成物及び導電回路 |
CN107078200B (zh) * | 2014-10-23 | 2018-12-07 | 株式会社钟化 | Led灯散热器 |
WO2018146223A1 (en) * | 2017-02-13 | 2018-08-16 | Dsm Ip Assets B.V. | Method for preparing composition suitable for electrostatic painting |
JP2019199003A (ja) * | 2018-05-15 | 2019-11-21 | 東芝機械株式会社 | 導電性複合材料の製造方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06340799A (ja) * | 1993-06-02 | 1994-12-13 | Teijin Ltd | 導電性樹脂組成物 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6221547B1 (en) * | 1998-08-31 | 2001-04-24 | Bridgestone Corporation | Electrically conductive resin composition and photosensitive drum made therewith |
EP1112837B1 (en) * | 1999-12-28 | 2005-07-27 | Yukadenshi Co., Ltd. | Endless belt and its use for an image forming apparatus |
KR100428647B1 (ko) * | 2002-02-04 | 2004-04-28 | 삼성전자주식회사 | 감광체 및 그것을 이용한 화상형성 장치 |
-
2002
- 2002-12-26 WO PCT/JP2002/013646 patent/WO2004060998A1/ja active Application Filing
- 2002-12-26 AU AU2002361104A patent/AU2002361104A1/en not_active Abandoned
- 2002-12-26 CN CN02830117.XA patent/CN1720292A/zh active Pending
- 2002-12-26 US US10/540,559 patent/US20060151751A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06340799A (ja) * | 1993-06-02 | 1994-12-13 | Teijin Ltd | 導電性樹脂組成物 |
Also Published As
Publication number | Publication date |
---|---|
AU2002361104A1 (en) | 2004-07-29 |
CN1720292A (zh) | 2006-01-11 |
US20060151751A1 (en) | 2006-07-13 |
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