WO2010103896A1 - 中間転写体 - Google Patents
中間転写体 Download PDFInfo
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- WO2010103896A1 WO2010103896A1 PCT/JP2010/052330 JP2010052330W WO2010103896A1 WO 2010103896 A1 WO2010103896 A1 WO 2010103896A1 JP 2010052330 W JP2010052330 W JP 2010052330W WO 2010103896 A1 WO2010103896 A1 WO 2010103896A1
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- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000005365 phosphate glass Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- SITVSCPRJNYAGV-UHFFFAOYSA-L tellurite Chemical compound [O-][Te]([O-])=O SITVSCPRJNYAGV-UHFFFAOYSA-L 0.000 description 1
- UQMOLLPKNHFRAC-UHFFFAOYSA-N tetrabutyl silicate Chemical compound CCCCO[Si](OCCCC)(OCCCC)OCCCC UQMOLLPKNHFRAC-UHFFFAOYSA-N 0.000 description 1
- UVVUGWBBCDFNSD-UHFFFAOYSA-N tetraisocyanatosilane Chemical compound O=C=N[Si](N=C=O)(N=C=O)N=C=O UVVUGWBBCDFNSD-UHFFFAOYSA-N 0.000 description 1
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 1
- CZDYPVPMEAXLPK-UHFFFAOYSA-N tetramethylsilane Chemical compound C[Si](C)(C)C CZDYPVPMEAXLPK-UHFFFAOYSA-N 0.000 description 1
- ZUEKXCXHTXJYAR-UHFFFAOYSA-N tetrapropan-2-yl silicate Chemical compound CC(C)O[Si](OC(C)C)(OC(C)C)OC(C)C ZUEKXCXHTXJYAR-UHFFFAOYSA-N 0.000 description 1
- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical compound CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- ZWYDDDAMNQQZHD-UHFFFAOYSA-L titanium(ii) chloride Chemical compound [Cl-].[Cl-].[Ti+2] ZWYDDDAMNQQZHD-UHFFFAOYSA-L 0.000 description 1
- YONPGGFAJWQGJC-UHFFFAOYSA-K titanium(iii) chloride Chemical compound Cl[Ti](Cl)Cl YONPGGFAJWQGJC-UHFFFAOYSA-K 0.000 description 1
- WOZZOSDBXABUFO-UHFFFAOYSA-N tri(butan-2-yloxy)alumane Chemical compound [Al+3].CCC(C)[O-].CCC(C)[O-].CCC(C)[O-] WOZZOSDBXABUFO-UHFFFAOYSA-N 0.000 description 1
- MYWQGROTKMBNKN-UHFFFAOYSA-N tributoxyalumane Chemical compound [Al+3].CCCC[O-].CCCC[O-].CCCC[O-] MYWQGROTKMBNKN-UHFFFAOYSA-N 0.000 description 1
- XVYIJOWQJOQFBG-UHFFFAOYSA-N triethoxy(fluoro)silane Chemical compound CCO[Si](F)(OCC)OCC XVYIJOWQJOQFBG-UHFFFAOYSA-N 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- JLGNHOJUQFHYEZ-UHFFFAOYSA-N trimethoxy(3,3,3-trifluoropropyl)silane Chemical compound CO[Si](OC)(OC)CCC(F)(F)F JLGNHOJUQFHYEZ-UHFFFAOYSA-N 0.000 description 1
- LBNVCJHJRYJVPK-UHFFFAOYSA-N trimethyl(4-trimethylsilylbuta-1,3-diynyl)silane Chemical compound C[Si](C)(C)C#CC#C[Si](C)(C)C LBNVCJHJRYJVPK-UHFFFAOYSA-N 0.000 description 1
- KXFSUVJPEQYUGN-UHFFFAOYSA-N trimethyl(phenyl)silane Chemical compound C[Si](C)(C)C1=CC=CC=C1 KXFSUVJPEQYUGN-UHFFFAOYSA-N 0.000 description 1
- DCGLONGLPGISNX-UHFFFAOYSA-N trimethyl(prop-1-ynyl)silane Chemical compound CC#C[Si](C)(C)C DCGLONGLPGISNX-UHFFFAOYSA-N 0.000 description 1
- HYWCXWRMUZYRPH-UHFFFAOYSA-N trimethyl(prop-2-enyl)silane Chemical compound C[Si](C)(C)CC=C HYWCXWRMUZYRPH-UHFFFAOYSA-N 0.000 description 1
- ULYLMHUHFUQKOE-UHFFFAOYSA-N trimethyl(prop-2-ynyl)silane Chemical compound C[Si](C)(C)CC#C ULYLMHUHFUQKOE-UHFFFAOYSA-N 0.000 description 1
- GYIODRUWWNNGPI-UHFFFAOYSA-N trimethyl(trimethylsilylmethyl)silane Chemical compound C[Si](C)(C)C[Si](C)(C)C GYIODRUWWNNGPI-UHFFFAOYSA-N 0.000 description 1
- SIOVKLKJSOKLIF-HJWRWDBZSA-N trimethylsilyl (1z)-n-trimethylsilylethanimidate Chemical compound C[Si](C)(C)OC(/C)=N\[Si](C)(C)C SIOVKLKJSOKLIF-HJWRWDBZSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- CWMFRHBXRUITQE-UHFFFAOYSA-N trimethylsilylacetylene Chemical group C[Si](C)(C)C#C CWMFRHBXRUITQE-UHFFFAOYSA-N 0.000 description 1
- GIRKRMUMWJFNRI-UHFFFAOYSA-N tris(dimethylamino)silicon Chemical compound CN(C)[Si](N(C)C)N(C)C GIRKRMUMWJFNRI-UHFFFAOYSA-N 0.000 description 1
- SCHZCUMIENIQMY-UHFFFAOYSA-N tris(trimethylsilyl)silicon Chemical compound C[Si](C)(C)[Si]([Si](C)(C)C)[Si](C)(C)C SCHZCUMIENIQMY-UHFFFAOYSA-N 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
- G03G15/162—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support details of the the intermediate support, e.g. chemical composition
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0105—Details of unit
- G03G15/0131—Details of unit for transferring a pattern to a second base
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
- G03G2215/0103—Plural electrographic recording members
- G03G2215/0119—Linear arrangement adjacent plural transfer points
- G03G2215/0122—Linear arrangement adjacent plural transfer points primary transfer to an intermediate transfer belt
- G03G2215/0135—Linear arrangement adjacent plural transfer points primary transfer to an intermediate transfer belt the linear arrangement being vertical
Definitions
- the present invention relates to an intermediate transfer member. More specifically, the present invention relates to an intermediate transfer member used for electrophotographic image formation, in which at least a surface layer is provided on an elastic layer.
- the intermediate transfer method is used for so-called full-color image formation in which an image is formed using a plurality of types of toner such as black, cyan, magenta, and yellow. That is, each color toner image formed on a single or a plurality of photoconductors is sequentially primary transferred onto an intermediate transfer body to superimpose color images, and the full color image thus formed is transferred onto a transfer material. Thus, a full-color printed matter is produced.
- the intermediate transfer member is required to have high durability because the transfer of the toner image on the surface and the removal of the toner remaining after the transfer are repeatedly performed. Therefore, highly durable resin members typified by polyimide resin have been widely used. However, members made of such materials are generally hard and have poor adhesion to the surface of the photoconductor. However, it was difficult to transfer the toner image uniformly on the intermediate transfer member.
- an inorganic coating layer having a thickness of 0.1 to 70 ⁇ m is provided on an elastic layer so as not to cause transfer failure or image flow even after 60,000 full-color images are formed. ing.
- Patent Document 2 a surface layer made of a diamond-like carbon film having a high hardness and smoothness is provided to suppress damage and wear due to external force.
- Patent Document 3 discloses a technique for producing an intermediate transfer member having a structure in which a surface of a semiconductive endless belt made of an elastic material is subjected to an atmospheric pressure plasma treatment and a fluorine compound is chemically bonded to the surface of the elastic material. Yes.
- an intermediate transfer member having a surface layer for carrying a toner image and an adjacent layer having a smaller elastic modulus than the surface layer is disclosed (for example, see Patent Document 4).
- the intermediate transfer member is provided with an elastic layer, and another layer such as a surface layer is provided on the elastic layer, so that studies on intermediate transfer members that ensure transferability to transfer materials and improve durability are proceeding. Has been.
- JP 2000-206801 A JP 2006-259581 A JP 2003-165857 A JP 2008-122847 A
- Patent Document 1 reports an example in which an inorganic coating layer containing colloidal silica is provided on an elastic body to improve cleaning properties and prevent contamination of the surface of the intermediate transfer member with toner.
- an inorganic coating layer containing colloidal silica is provided on an elastic body to improve cleaning properties and prevent contamination of the surface of the intermediate transfer member with toner.
- Patent Document 3 it is estimated from Patent Document 3 that the wear resistance is improved.
- the organic layer that binds the colloidal silica, which may be scraped off and scratched, which may cause toner filming. Further, if the amount of colloidal silica added is increased to improve the wear resistance, cracks may occur.
- Patent Document 2 reports an example in which a high hardness and smooth coating layer is formed on an elastic body. However, when these are used as an intermediate transfer body, the transfer performance from the intermediate transfer body to the transfer material is suppressed because the coating layer formed on the elastic body is hard, and as a result, text images are lost and toner is scattered. Such a problem occurs.
- Patent Document 3 discloses an intermediate transfer member in which a layer made of a fluorine compound is provided on an elastic body.
- the fluorine compound formed on the surface is very soft, it is caused by wear on a cleaning blade as a cleaning member. Scratches occur, and when a large number of sheets are printed, there arises a problem that the image is deteriorated.
- Cited Document 4 an intermediate transfer member in which an adjacent layer (paste-like resin) is provided on a back layer (insulating resin film) and a surface layer (carbon black is dispersed in a resin such as polyester) is further provided thereon. Is being considered. However, there are problems that the wear resistance of the surface layer is low and toner filming occurs.
- An object of the present invention is that image defects and toner filming due to cracks do not occur even when a large number of sheets (for example, 160,000 sheets) are printed, and good cleaning characteristics can be maintained. It is an object of the present invention to provide an excellent intermediate transfer member that does not cause image smearing and can continuously obtain a high-quality print image.
- Intermediate transfer member used in an image forming apparatus having means for first transferring a toner image carried on the surface of an electrophotographic photosensitive member to an intermediate transfer member and then secondary transferring the toner image from the intermediate transfer member to a transfer material
- the intermediate transfer member is provided with an elastic layer on the outer periphery of a resin substrate and a surface layer thereon, and the surface layer is selected from an intermediate layer, a metal oxide, a carbon-containing oxide, and amorphous carbon.
- the layer thickness of the intermediate layer is 100 nm or more and 1000 nm or less, the hardness is 0.1 GPa or more and 2.0 GPa or less, and the elastic modulus is 0.5 GPa or more and 10.0 GPa or less,
- the elastic layer is a layer formed of at least one of chloroprene rubber, nitrile rubber, styrene-butadiene rubber, silicone rubber, urethane rubber, and ethylene-propylene copolymer.
- the intermediate transfer member according to any one of the above.
- the intermediate transfer member of the present invention does not cause image defects or toner filming due to cracks even when a large number of sheets (for example, 160,000 sheets) are printed, and can maintain good cleaning characteristics. There is no fog and it has the outstanding effect that a high-quality printed image is obtained continuously.
- FIG. 3 is a conceptual cross-sectional view showing a layer configuration of an intermediate transfer member. It is explanatory drawing of the 1st manufacturing apparatus which manufactures the hard layer of an intermediate transfer body. It is explanatory drawing of the 2nd manufacturing apparatus which manufactures the hard layer of an intermediate transfer body. It is explanatory drawing of the 1st plasma film-forming apparatus which manufactures the hard layer of an intermediate transfer body with plasma. It is the schematic which shows an example of a roll electrode. 1 is a cross-sectional configuration diagram illustrating an example of an image forming apparatus in which an intermediate transfer member of the present invention can be used.
- the present inventors do not generate image defects or toner filming due to cracks even when a large number of sheets (for example, 160,000 sheets) are printed, and maintain good cleaning characteristics.
- An intermediate transfer member having an excellent effect of continuously obtaining a high-quality print image without any problems was studied.
- an intermediate transfer body having a specific value for the thickness, hardness, and elastic modulus of the surface layer in the configuration in which an elastic layer is provided on the outer periphery of the resin substrate and the surface layer is provided thereon has cracks. It has been found that excellent characteristics such as prevention of occurrence of image defects and toner filming due to toner, maintenance of cleaning properties and durability can be exhibited.
- the conductivity can be ensured without adding a conductive agent to the surface layer, so that the toner image is transferred from the intermediate transfer member to the transfer material. In this case, it is possible to prevent occurrence of character dust due to toner scattering.
- a conductive agent since it is not necessary to add a conductive agent, it is presumed that the physical properties of the surface layer itself are not deteriorated, and that the sliding property and the wear resistance can be sufficiently exhibited.
- the intermediate layer acts as a cushion and prevents the hard layer from cracking or peeling. I guess it is possible.
- the combination of layer thickness, hardness, and elastic modulus of the hard layer and intermediate layer is related to the effect combination of characteristics such as prevention of image defects and toner filming caused by cracks, maintenance of cleaning properties, and durability. I found.
- the intermediate transfer member secondarily transfers the toner image on the intermediate transfer member to the transfer material, and then the transfer residual toner that is not transferred onto the intermediate transfer member is removed by a cleaning member (for example, a cleaning blade, a fur brush, It is cleaned by a foaming roller or a combination thereof.
- a cleaning member for example, a cleaning blade, a fur brush, It is cleaned by a foaming roller or a combination thereof.
- the layer thicknesses of the surface layer, the intermediate layer, and the hard layer are values obtained by measurement using “MXP21 (manufactured by Mac Science)”.
- the layer thickness can be measured by the following method.
- Copper is used as the target of the X-ray source, and it is operated at 42 kV and 500 mA.
- a multilayer parabolic mirror is used for the incident monochromator.
- the incident slit is 0.05 mm ⁇ 5 mm, and the light receiving slit is 0.03 mm ⁇ 20 mm.
- Measurement is performed by the FT method with a step width of 0.005 ° and a step of 10 seconds from 0 to 5 ° in the 2 ⁇ / ⁇ scan method.
- Reflectivity Analysis Program Ver. 1 is used to perform curve fitting, and each parameter is obtained so that the residual sum of squares of the actually measured value and the fitting curve is minimized.
- the layer thickness is obtained from each parameter.
- the thickness of the intermediate layer is determined by measuring the thickness of the surface layer (intermediate layer + hard layer), then removing the hard layer by polishing or the like, exposing the intermediate layer, and measuring by the above method. .
- the layer thickness of the hard layer is a layer thickness obtained by subtracting the layer thickness of the intermediate layer from the layer thickness of the surface layer.
- the hardness and elastic modulus of the surface layer, the intermediate layer, and the hard layer can be determined by a conventionally known hardness and elastic modulus measurement method.
- a method for measuring a constant strain by applying a constant frequency (Hz) using an orientec Vibron DDV-2, and using RSA-II (manufactured by Remetrics) as a measuring device on a transparent substrate.
- a method obtained from a measurement value obtained when the applied strain is changed at a constant frequency, or a nanoindenter to which a nanoindentation method is applied for example, a nanoindenter “NanoIdenter manufactured by MST Systems Co., Ltd.” It can be measured by “TMXP / DCM”.
- the surface layer of the intermediate transfer member and the elastic modulus of the intermediate layer and the hard layer are values obtained by measurement by a nanoindentation method.
- the hardness and elastic modulus of the hard layer are measured directly, and the hardness and elastic modulus of the intermediate layer are measured by removing the hard layer by polishing or the like to expose the intermediate layer and measuring by the nanoindentation method.
- the measurement method of hardness and elastic modulus by the nanoindentation method is to measure the relationship between load and indentation depth (displacement amount) while pushing a small diamond indenter into a thin layer, and calculate the plastic deformation hardness from the measured value. Is the method.
- FIG. 1 is a schematic view showing an example of a measuring apparatus for measuring hardness and elastic modulus by a nanoindentation method.
- 31 is a transducer
- 32 is an equilateral triangular diamond Berkovich indenter
- 170 is an intermediate transfer member
- 175 is a resin substrate
- 176 is an elastic layer
- 177 is a surface layer.
- This measuring device can measure the displacement with nanometer accuracy using a transducer 31 and a diamond Berkovich indenter 32 having a regular triangular tip while applying a load of ⁇ N order.
- a transducer 31 and a diamond Berkovich indenter 32 having a regular triangular tip while applying a load of ⁇ N order for example, commercially available “NANO IndenterXP / DCM” (MTS Systems / MST NANO Instruments) can be used.
- FIG. 2 shows a typical load-displacement curve obtained by hardness and elastic modulus measurement by the nanoindentation method.
- FIG. 3 is a schematic diagram showing a state where the indenter is in contact with the sample.
- the hardness H is obtained from the following formula (1).
- Formula (1) H Pmax / A
- P is the maximum load applied to the indenter
- A is the contact projection area between the indenter and the sample at that time.
- the contact projection area A can be expressed by the following formula (2) using hc in FIG.
- Formula (2) A 24.5hc 2
- hc becomes shallower than the entire indentation depth h due to the elastic dent on the peripheral surface of the contact point as shown in FIG. 3, and is expressed by the following formula (3).
- ⁇ is a constant related to the shape of the indenter, and is 0.75 for the Berkovich indenter.
- the hardness and elastic modulus of each layer of the intermediate transfer member can be measured.
- Measurement conditions Measuring instrument: NANO Indenter XP / DCM (manufactured by MTS Systems) Measuring indenter: Diamond Berkovich indenter with a regular triangular tip Measurement environment: 20 ° C., 60% RH Measurement sample: Cut the intermediate transfer member to a size of 5 cm ⁇ 5 cm to prepare a measurement sample Maximum load setting: 25 ⁇ N Indentation speed: A speed that reaches a maximum load of 25 ⁇ N in 5 seconds, and a load is applied in proportion to the time. In addition, each sample is randomly measured at 10 points, and the average value is measured by the nanoindentation method. Elastic modulus.
- the intermediate transfer member of the present invention is one in which an elastic layer is provided on the outer periphery of a resin substrate and a surface layer is provided thereon.
- the surface layer may be composed of one or more hard layers and one or more intermediate layers.
- a layer structure in which a resin layer is further provided on the elastic layer may be used.
- FIG. 4 is a conceptual cross-sectional view showing an example of the layer structure of the intermediate transfer member.
- 170 is an intermediate transfer member
- 175 is a resin substrate
- 176 is an elastic layer
- 177 is a surface layer
- 178 is an intermediate layer
- 178a is the first layer of the intermediate layer
- 178b is the second layer of the intermediate layer
- 178c is The third layer 179 of the intermediate layer indicates a hard layer.
- FIG. 4A shows an intermediate transfer body 170 having a layer structure in which an elastic layer 176 is provided on the outer periphery of a resin substrate 175 and a surface layer 177 is provided thereon.
- FIG. 4B shows an intermediate transfer body 170 having a layer structure in which an elastic layer 176 is provided on the outer periphery of a resin substrate 175 and an intermediate layer 178 and a hard layer 179 are provided thereon as a surface layer 177.
- an elastic layer 176 is provided on the outer periphery of the resin substrate 175, and three intermediate layers (178a, 178b, 178c) are provided thereon as a surface layer 177, and a hard layer 179 is provided thereon.
- the layer structure of the intermediate transfer member may be either (a) in FIG. 4 or (b) in FIG.
- the resin substrate has rigidity that prevents the intermediate transfer body from being deformed by a load applied to the intermediate transfer belt from the cleaning member, and reduces the influence on the transfer portion.
- the resin substrate is preferably a material having an elastic modulus measured by the nanoindentation method in the range of 1.5 to 15.0 GPa.
- the resin substrate according to the present invention has a thickness of 50 to 200 ⁇ m seamlessly prepared by adding a conductive substance to the resin material and adjusting the electric resistance value (volume resistivity) to 1 ⁇ 10 5 to 1 ⁇ 10 11 ⁇ ⁇ cm.
- a belt or a drum having mechanical strength is preferred.
- carbon black As the conductive substance added to the resin material, carbon black can be used. As carbon black, neutral or acidic carbon black can be used.
- the amount of the conductive material used varies depending on the type of the conductive material to be used, but it may be added so that the volume resistance value and the surface resistance value of the intermediate transfer member are within a predetermined range. Usually, 100 parts by mass of the resin material The amount is 10 to 20 parts by mass, preferably 10 to 16 parts by mass.
- the elastic layer is provided for the purpose of reducing the concentrated load on the toner image and preventing the occurrence of voids in the character image in the toner image.
- the elastic layer according to the present invention can be composed of rubber or elastomer.
- styrene-butadiene rubber high styrene rubber, butadiene rubber, isoprene rubber, ethylene-propylene copolymer, nitrile butadiene rubber, chloroprene rubber, butyl rubber, silicone rubber, fluorine rubber, nitrile rubber, urethane rubber, acrylic rubber, epi
- styrene-butadiene rubber high styrene rubber, butadiene rubber, isoprene rubber, ethylene-propylene copolymer, nitrile butadiene rubber, chloroprene rubber, butyl rubber, silicone rubber, fluorine rubber, nitrile rubber, urethane rubber, acrylic rubber, epi
- chlorohydrin rubber and a norbornene rubber may be used alone or as a mixture, and may be formed from one elastic material.
- the hardness of the elastic layer according to the present invention is preferably JIS A hardness of 40 ° to 80 °.
- the thickness of the elastic layer is preferably 100 to 500 ⁇ m.
- the elastic layer according to the present invention is preferably a layer in which a conductive substance is dispersed in an elastic material and an electric resistance value (volume resistivity) is adjusted to 10 5 to 10 11 ⁇ ⁇ cm.
- the conductive substance added to the elastic layer carbon black, zinc oxide, tin oxide, silicon carbide or the like can be used. As carbon black, neutral or acidic carbon black can be used.
- the amount of the conductive material used varies depending on the type of the conductive material to be used, but may be added so that the volume resistance value and the surface resistance value of the elastic layer are within a predetermined range. The amount is 10 to 20 parts by mass, preferably 10 to 16 parts by mass.
- the surface layer is preferably a layer containing a metal oxide, a carbon-containing metal oxide, and amorphous carbon.
- the layer thickness of the surface layer is 100 to 1000 nm, preferably 300 to 1000 nm, more preferably 500 to 1000 nm.
- middle layer and the hard layer is a layer thickness shown above.
- the hardness of the surface layer is 0.1 to 10.0 GPa, preferably 0.2 to 6.0 GPa.
- the elastic modulus of the surface layer is 0.5 to 50.0 GPa, preferably 0.5 to 30.0 GPa.
- the surface layer is configured to include an intermediate layer and a hard layer
- the surface layer is preferably formed of the following intermediate layer and a hard layer mainly composed of a metal oxide.
- the intermediate layer is provided for the purpose of preventing the hard layer from cracking or peeling from the elastic layer.
- the intermediate layer is formed of one or more layers.
- the intermediate layer is preferably a layer mainly composed of silicon oxide containing 1.0 to 20 atom% of carbon atoms, or an amorphous carbon layer. Moreover, the layer which consists of those mixtures is also preferable.
- the layer thickness of the intermediate layer is preferably 100 to 1000 nm, more preferably 300 to 1000 nm, and even more preferably 500 to 1000 nm.
- the hardness of the intermediate layer is preferably 0.1 to 2.0 GPa, more preferably 0.2 to 1.5 GPa.
- the elastic modulus of the intermediate layer is preferably 0.5 to 10.0 GPa, more preferably 0.5 to 5.0 GPa.
- the intermediate layer is a layer having a smaller hardness and elastic modulus than the hard layer, and may have a structure in which the hardness and the elastic modulus gradually increase from the surface of the elastic layer toward the hard layer. That the hardness and elastic modulus gradually increase may be a multi-layer structure or an inclined structure.
- the method for forming the intermediate layer is not particularly limited, but can be formed by an atmospheric pressure plasma method in which two or more electric fields having different frequencies to be described later are applied.
- the output of the power source to be applied is controlled, the concentration of supplying the raw material during the atmospheric pressure plasma treatment is controlled, and the carbon atom content and layer density of the intermediate layer are appropriately adjusted.
- the desired hardness and elastic modulus can be achieved.
- the hard layer is provided for the purpose of preventing the occurrence of toner filming, ensuring high transfer characteristics, and preventing the occurrence of scratches by a cleaning member.
- the layer thickness of the hard layer is preferably 0 to 50 nm, more preferably 10 to 30 nm.
- the hardness of the hard layer is preferably 2.0 to 10.0 GPa, more preferably 2.0 to 6.0 GPa, still more preferably 2.0 to 5.0 GPa.
- the elastic modulus of the hard layer is preferably 10.0 to 50.0 GPa, more preferably 11.0 to 30.0 GPa, still more preferably 11.0 to 20.0 GPa.
- the hard layer is a layer mainly composed of a metal oxide.
- metal oxides such as silicon oxide, silicon oxynitride, silicon nitride, titanium oxide, titanium oxynitride, titanium nitride, and aluminum oxide, and among these, a silicon oxide layer is preferable.
- the hard layer in the present invention has one or more layers.
- the layer of the hard layer may have a structure in which the hardness and elastic modulus gradually increase or the density gradually increases toward the surface of the hard layer farthest from the intermediate layer.
- resin substrate of the intermediate transfer member As the resin substrate of the intermediate transfer member, a seamless belt made of a resin material containing a conductive substance can be used.
- the resin substrate used in the present invention can be produced by a conventionally known general method. For example, it can be manufactured by melting a material obtained by mixing a conductive substance in a resin with an extruder, extruding it with an annular die or a T die, and rapidly cooling it.
- the resin substrate may be subjected to a surface treatment such as corona treatment, flame treatment, plasma treatment, glow discharge treatment, roughening treatment, chemical treatment, etc. before forming the elastic layer.
- a surface treatment such as corona treatment, flame treatment, plasma treatment, glow discharge treatment, roughening treatment, chemical treatment, etc.
- an anchor coat agent layer may be formed between the elastic layer and the resin substrate for the purpose of improving adhesion.
- the anchor coating agent used in this anchor coating agent layer include polyester resins, isocyanate resins, urethane resins, acrylic resins, ethylene vinyl alcohol resins, vinyl modified resins, epoxy resins, modified styrene resins, modified silicone resins, and alkyl titanates. Can be used alone or in combination. Conventionally known additives can be added to these anchor coating agents.
- the above-mentioned anchor coating agent is coated on a resin substrate by a known method such as roll coating, gravure coating, knife coating, dip coating, spray coating, etc., and the solvent, diluent, etc. are removed by drying or UV cured.
- Anchor coating can be applied.
- the application amount of the anchor coating agent is preferably about 0.1 to 5 g / m 2 (dry state).
- the elastic layer can be produced as follows.
- the surface layer can be formed by a plasma CVD method (hereinafter, also simply referred to as “atmospheric pressure plasma CVD”) performed at a pressure under atmospheric pressure or in the vicinity thereof.
- a plasma CVD method hereinafter, also simply referred to as “atmospheric pressure plasma CVD”
- FIG. 5 is an explanatory diagram of a first manufacturing apparatus for manufacturing the surface layer of the intermediate transfer member.
- the first production apparatus for the intermediate transfer member (direct method in which the discharge space and the thin layer deposition region are substantially the same) forms a surface layer on the elastic layer 176 formed on the resin substrate 175, and is a seamless belt-like intermediate. Consists of a roll electrode 20 and a driven roller 201 that are wound around a resin substrate 175 of a transfer body 170 and rotated in the direction of the arrow, and an atmospheric pressure plasma CVD apparatus 3 that is a film forming apparatus that forms a surface layer on the surface of the elastic layer 176 Has been.
- the atmospheric pressure plasma CVD apparatus 3 includes at least one set of fixed electrodes 21 arranged along the outer periphery of the roll electrode 20, a discharge space 23 in which discharge is performed in a region where the fixed electrode 21 and the roll electrode 20 face each other, A mixed gas supply device 24 that generates a mixed gas G of at least a raw material gas and a discharge gas and supplies the mixed gas G to the discharge space 23; a discharge vessel 29 that reduces the inflow of air into the discharge space 23 and the like; A first power source 25 connected to the roll electrode 20, a second power source 26 connected to the fixed electrode 21, and an exhaust unit 28 that exhausts the used exhaust gas G ′.
- the mixed gas supply device 24 supplies, to the discharge space 23, a mixed gas obtained by mixing a source gas forming at least one layer selected from an inorganic oxide layer and an inorganic nitride layer, and a rare gas such as nitrogen gas or argon gas. Supply. Moreover, it is more preferable to mix oxygen gas or hydrogen gas for promoting the reaction by the oxidation-reduction reaction.
- the driven roller 201 is pulled in the direction of the arrow by the tension applying means 202 and applies a predetermined tension to the resin base 175.
- the tension applying means 202 cancels the application of the tension when the resin base 175 is changed, so that the resin base 175 can be easily changed.
- the first power supply 25 outputs a voltage having a frequency ⁇ 1
- the second power supply 26 outputs a voltage having a frequency ⁇ 2
- the electric field V in which the frequencies ⁇ 1 and ⁇ 2 are superimposed is generated in the discharge space 23 by these voltages.
- the mixed gas G is turned into plasma by the electric field V, and a layer (intermediate layer, hard layer) corresponding to the source gas contained in the mixed gas G is deposited on the surface of the elastic layer 176.
- a plurality of fixed electrodes positioned on the downstream side in the rotation direction of the roll electrode and the mixed gas supply device are stacked so that the surface layer is stacked, and the thickness of the surface layer is adjusted. good.
- the surface layer is deposited with the fixed electrode located on the most downstream side in the rotation direction of the roll electrode and the mixed gas supply device, and with the other fixed electrode and mixed gas supply device located further upstream,
- other layers such as an adhesive layer for improving the adhesion between the surface layer and the elastic layer 176 may be formed.
- a gas supply device for supplying a gas such as argon or oxygen and a fixed electrode are provided upstream of the fixed electrode for forming the surface layer and the mixed gas supply device.
- the surface of the elastic layer 176 may be activated by providing a plasma treatment.
- the intermediate transfer member which is a seamless belt, is stretched around a pair of rollers, and one of the pair of rollers serves as one electrode of a pair of electrodes, and the outer peripheral surface of the roller as one electrode At least one fixed electrode which is the other electrode is provided along the outside of the electrode, and an electric field is generated between the pair of electrodes at atmospheric pressure or near atmospheric pressure to cause plasma discharge, and a thin layer is formed on the surface of the intermediate transfer member.
- FIG. 6 is an explanatory diagram of a second manufacturing apparatus for manufacturing the surface layer of the intermediate transfer member.
- the second production apparatus 2b for the intermediate transfer member forms a surface layer simultaneously on the elastic layer provided on the plurality of resin substrates, and includes a plurality of film forming apparatuses 2b1 that mainly form the surface layer on the elastic layer, and 2b2.
- the second manufacturing apparatus 2b (a method in which discharge and thin layer deposition are performed between opposed roll electrodes by a modification of the direct system) is arranged in a substantially mirror image relationship with the first film forming apparatus 2b1 with a predetermined gap therebetween.
- the mixed gas G of at least the raw material gas and the discharge gas disposed between the second film forming apparatus 2b2 and the first film forming apparatus 2b1 and the second film forming apparatus 2b2 is generated to generate the discharge space 23b.
- a mixed gas supply device 24b for supplying the mixed gas G to the above.
- the first film forming apparatus 2b1 is a seamless belt-shaped intermediate transfer member resin substrate 175 wound around a roll electrode 20a that rotates in an arrow direction, a driven roller 201, and a tension applying unit 202 that pulls the driven roller 201 in the arrow direction. And a first power supply 25 connected to the roll electrode 20a.
- the second film forming apparatus 2b2 winds the resin substrate 175 of a seamless belt-like intermediate transfer member and rotates in the direction of the arrow.
- the second manufacturing apparatus 2b has a discharge space 23b in which discharge is performed in a region where the roll electrode 20a and the roll electrode 20b are opposed to each other.
- the mixed gas supply device 24b supplies, to the discharge space 23b, a mixed gas obtained by mixing a source gas forming at least one layer selected from an inorganic oxide layer and an inorganic nitride layer and a rare gas such as nitrogen gas or argon gas. Supply. Moreover, it is more preferable to mix oxygen gas or hydrogen gas for promoting the reaction by the oxidation-reduction reaction.
- the first power supply 25 outputs a voltage having a frequency ⁇ 1
- the second power supply 26 outputs a voltage having a frequency ⁇ 2, and generates an electric field V in which the frequencies ⁇ 1 and ⁇ 2 are superimposed on the discharge space 23b.
- the mixed gas G is converted into plasma (excited) by the electric field V
- the plasma (excited) mixed gas is converted into the elastic layer 176 of the first film forming apparatus 2b1 and the surface of the elastic layer 176 of the second film forming apparatus 2b2.
- a layer (intermediate layer, hard layer) corresponding to the source gas contained in the mixed gas that has been exposed to plasma and turned into plasma (excited) is provided with the elastic layer 176 and the second layer provided on the resin substrate 175 of the first film forming apparatus 2b1. They are simultaneously deposited and formed on the surface of the elastic layer 176 provided on the resin substrate 175 of the film forming apparatus 2b2.
- the roll electrode 20a and the roll electrode 20b facing each other are arranged with a predetermined gap therebetween.
- FIG. 7 mainly extracts the broken line part of FIG.
- FIG. 7 is an explanatory view of a first plasma film forming apparatus for producing a surface layer of an intermediate transfer member by plasma.
- the atmospheric pressure plasma CVD apparatus 3 has at least one pair of rollers that detachably rolls and rotates a resin substrate, and at least one pair of electrodes that perform plasma discharge.
- One electrode is one of the pair of rollers, and the other electrode is a fixed electrode facing the one roller through the resin base, and the one roller and the fixed electrode are opposed to each other.
- An apparatus for manufacturing an intermediate transfer body in which the surface layer is exposed to plasma generated in a region to deposit and form the surface layer For example, when nitrogen is used as a discharge gas, a high voltage is applied by one power source to the other. It is preferably used in order to start discharge stably and continue discharge by applying a high frequency with the power source.
- the atmospheric pressure plasma CVD apparatus 3 includes the mixed gas supply device 24, the fixed electrode 21, the first power source 25, the first filter 25a, the roll electrode 20, and the driving means 20a for driving and rotating the roll electrode in the arrow direction.
- a second power source 26 and a second filter 26a are provided, and plasma discharge is performed in the discharge space 23 to excite the mixed gas G obtained by mixing the source gas and the discharge gas, and the excited mixed gas G1 is converted into the elastic layer. It is exposed to the surface 176a, and a surface layer 177 is deposited and formed on the surface.
- a first high frequency voltage having a frequency ⁇ 1 is applied to the fixed electrode 21 from the first power source 25, and a high frequency voltage having a frequency ⁇ 2 is applied to the roll electrode 20 from the second power source 26.
- an electric field is generated between the fixed electrode 21 and the roll electrode 20 in which the frequency ⁇ 1 is superimposed on the electric field strength V1 and the frequency ⁇ 2 is superimposed on the electric field strength V2, the current I1 flows through the fixed electrode 21, and the current flows through the roll electrode 20 I2 flows and plasma is generated between the electrodes.
- the relationship between the frequency ⁇ 1 and the frequency ⁇ 2, and the relationship between the electric field strength V1, the electric field strength V2, and the electric field strength IV at which discharge of the discharge gas is started is ⁇ 1 ⁇ 2, and V1 ⁇ IV> V2, or V1> IV ⁇ V2 is satisfied, and the output density of the second high-frequency electric field is 1 W / cm 2 or more.
- the electric field strength V1 applied from at least the first power source 25 is 3.7 kV / mm or more, and the second high-frequency power source 60 is used.
- the electric field strength V2 applied from is preferably 3.7 kV / mm or less.
- first power source 25 high frequency power source
- first atmospheric pressure plasma CVD apparatus 3 Applied power symbol Manufacturer Frequency Product name A1 Shinko Electric 3kHz SPG3-4500 A2 Shinko Electric Co., Ltd. 5kHz SPG5-4500 A3 Kasuga Electric 15kHz AGI-023 A4 Shinko Electric 50kHz SPG50-4500 A5 HEIDEN Laboratory 100kHz * PHF-6k A6 Pearl Industry 200kHz CF-2000-200k A7 Pearl Industry 400kHz CF-2000-400k A8 SEREN IPS 100 ⁇ 460kHz L3001 And the like, and any of them can be used.
- Second power source 26 (high frequency power source)
- Applied power symbol Manufacturer Frequency Product name B1 Pearl Industry 800kHz CF-2000-800k
- B2 Pearl Industry 2MHz CF-2000-2M B3 Pearl Industry 13.56MHz CF-5000-13M
- B5 Pearl Industry 150MHz CF-2000-150M B6 Pearl Industry 20-99.9MHz RP-2000-20 / 100M And the like, and any of them can be used.
- * indicates a HEIDEN Laboratory impulse high-frequency power source (100 kHz in continuous mode). Other than that, it is a high-frequency power source that can apply only a continuous sine wave.
- the power supplied between the opposing electrodes from the first and second power sources supplies power (power density) of 1 W / cm 2 or more to the fixed electrode 21 to generate plasma by exciting the discharge gas.
- the upper limit value of the power supplied to the fixed electrode 21 is preferably 50 W / cm 2 , more preferably 20 W / cm 2 .
- the lower limit is preferably 1.2 W / cm 2 .
- the discharge area (cm 2 ) refers to an area in a range where discharge occurs in the electrode.
- the power density can be improved while maintaining the uniformity of the high frequency electric field.
- the further uniform high-density plasma can be produced
- it is 5 W / cm 2 or more.
- the upper limit value of the power supplied to the roll electrode 20 is preferably 50 W / cm 2 .
- the waveform of the high-frequency electric field is not particularly limited.
- a continuous sine wave continuous oscillation mode called a continuous mode
- an intermittent oscillation mode called ON / OFF intermittently called a pulse mode. Either of them may be adopted, but at least the high frequency supplied to the roll electrode 20
- the continuous sine wave is preferable because a denser and higher quality layer can be obtained.
- a first filter 25 a is installed between the fixed electrode 21 and the first power supply 25 to facilitate passage of current from the first power supply 25 to the fixed electrode 21, and the second power supply 26.
- the current from the second power source 26 to the first power source 25 is less likely to pass through, and the second electrode 26 and the second power source 26 are connected between the second electrode 26 and the second power source 26.
- a filter 26a is provided to facilitate the passage of current from the second power source 26 to the roll electrode 20, ground the current from the first power source 21, and the first power source 25 to the second power source 26. It is designed to make it difficult for current to pass through.
- Electrode 21 and the roll electrode 20 have at least a resistance to discharge by a strong electric field.
- One electrode surface is coated with the following dielectric.
- the relationship between the electrode and the power source may be that the second power source 26 is connected to the fixed electrode 21 and the first power source 25 is connected to the roll electrode 20.
- FIG. 8 is a schematic view showing an example of a roll electrode.
- the roll electrode 20 is formed by spraying ceramic on a conductive base material 200a (hereinafter also referred to as “electrode base material”) such as metal, and then applying an inorganic material.
- a ceramic coating-treated dielectric 200b (hereinafter also simply referred to as “dielectric”) covered with a sealing material is used.
- alumina is more preferably used because it is easily processed.
- the roll electrode 20 ' may be configured by a combination of a conductive base material 200A such as metal covered with a lining dielectric 200B provided with an inorganic material by lining.
- a conductive base material 200A such as metal covered with a lining dielectric 200B provided with an inorganic material by lining.
- the lining material silicate glass, borate glass, phosphate glass, germanate glass, tellurite glass, aluminate glass, vanadate glass and the like are preferably used. Of these, borate glass is more preferred because it is easy to process.
- Examples of the conductive base materials 200a and 200A such as metal include metals such as silver, platinum, stainless steel, aluminum, titanium, titanium alloy, and iron. Stainless steel is preferable from the viewpoint of processing and cost.
- the base material 200a, 200A of the roll electrode uses a stainless steel jacket roll base material having a cooling means with cooling water (not shown).
- the mixed gas G is generated from the mixed gas supply device 24 and discharged into the discharge space 23.
- a voltage of frequency ⁇ 1 is output from the first power supply 25 and applied to the fixed electrode 21, and a voltage of frequency ⁇ 2 is output from the second power supply 26 and applied to the roll electrode 20, and these voltages enter the discharge space 23.
- An electric field V in which the frequencies ⁇ 1 and ⁇ 2 are superimposed is generated.
- the mixed gas G discharged into the discharge space 23 by the electric field V is excited to be in a plasma state. Then, the mixed gas G in a plasma state is exposed to the elastic layer surface, and at least one layer selected from the inorganic oxide layer and the inorganic nitride layer, that is, the surface layer 177 is formed on the elastic layer 176 by the raw material gas in the mixed gas G. To form.
- the discharge gas refers to a gas that is plasma-excited under the above-mentioned conditions, and examples thereof include nitrogen, argon, helium, neon, krypton, xenon, and mixtures thereof. Among these, nitrogen, helium, and argon are preferably used, and nitrogen is particularly preferable because of low cost.
- a gas or liquid organometallic compound As a source gas used for forming the surface layer, a gas or liquid organometallic compound, particularly an alkyl metal compound, a metal alkoxide compound, or an organometallic complex compound is used at room temperature.
- the phase state of these raw materials does not necessarily need to be a gas phase at normal temperature and normal pressure, and can be solid even in a liquid phase as long as it can be vaporized through heating, decompression, etc. by melting, evaporation, sublimation, etc. It can also be used in phases.
- the raw material gas contains a component that is in a plasma state in the discharge space and forms a thin layer, such as an organometallic compound, an organic compound, and an inorganic compound.
- Titanium compounds include organometallic compounds such as tetradimethylaminotitanium, metal hydrogen compounds such as monotitanium and dititanium, metal halogen compounds such as titanium dichloride, titanium trichloride, and titanium tetrachloride, tetraethoxy titanium, tetraisopropoxy titanium And metal alkoxides such as tetrabutoxytitanium, but are not limited thereto.
- Aluminum compounds include aluminum n-butoxide, aluminum s-butoxide, aluminum t-butoxide, aluminum diisopropoxide ethyl acetoacetate, aluminum ethoxide, aluminum hexafluoropentanedionate, aluminum isopropoxide, aluminum (III) 2 , 4-pentandionate, dimethylaluminum chloride and the like, but are not limited thereto.
- these raw materials may be used alone, or two or more kinds of components may be mixed and used.
- an additive gas is used for the purpose of controlling the composition, hardness, elastic modulus, and layer density during stratification.
- the additive gas examples include oxygen, hydrogen, and carbon dioxide gas.
- oxygen when hydrogen is used as the additive gas, a carbon-containing layer is easily formed, and when oxygen is used, a metal oxide layer is easily formed.
- the hardness and elastic modulus of the surface layer can be adjusted by the stratification speed, the raw material gas used, the type of additive gas, the amount ratio of each gas, and the like.
- the intermediate layer containing carbon atoms causes plasma excitation of a mixed gas (discharge gas) between a pair of electrodes (roll electrode 20 and fixed electrode 21).
- the source gas having carbon atoms present in the plasma is radicalized and exposed to the surface of the elastic layer 176.
- numerator and carbon containing radical which were exposed to the surface of this elastic layer 176 are contained in an intermediate
- an organic compound gas that is a gas or a liquid at room temperature, particularly a hydrocarbon gas, is used.
- the phase state of these raw materials does not necessarily need to be a gas phase at normal temperature and normal pressure, and can be solid even in a liquid phase as long as it can be vaporized through heating, decompression, etc. by melting, evaporation, sublimation, etc. It can also be used in phases.
- hydrocarbon gas for example, paraffinic hydrocarbons such as CH 4 , C 2 H 6 , C 3 H 8 , and C 4 H 10 , and acetylene carbonization such as C 2 H 2 and C 2 H 4 are used.
- Gases containing at least all hydrocarbons such as hydrogen, olefinic hydrocarbons, diolefinic hydrocarbons, and aromatic hydrocarbons can be used.
- Other than further hydrocarbons for example, alcohols, ketones, ethers, esters, CO, CO 2, etc. can be used as long as it is a compound containing at least carbon elements.
- these source gases may be used alone, or two or more kinds of components may be mixed and used.
- the intermediate transfer member of the present invention is suitably used for image forming methods and image forming apparatuses such as electrophotographic copying machines, printers, and facsimiles.
- An image forming apparatus that can use the intermediate transfer member of the present invention will be described using a color image forming apparatus as an example.
- FIG. 10 is a cross-sectional configuration diagram illustrating an example of a color image forming apparatus.
- This color image forming apparatus 1 is called a tandem type full-color copying machine, and includes an automatic document feeder 13, a document image reading device 14, a plurality of exposure means 13Y, 13M, 13C, and 13K, and a plurality of sets of images.
- the forming units 10 ⁇ / b> Y, 10 ⁇ / b> M, 10 ⁇ / b> C, 10 ⁇ / b> K, the intermediate transfer body unit 17, the paper feeding unit 15, and the fixing unit 124 are included.
- An automatic document feeder 13 and a document image reading device 14 are arranged on the upper part of the main body 12 of the image forming apparatus, and an image of the document d conveyed by the automatic document feeder 13 is an optical system of the document image reading device 14. The image is reflected and imaged by the line image sensor CCD.
- the analog signal obtained by photoelectrically converting the original image read by the line image sensor CCD is subjected to analog processing, A / D conversion, shading correction, image compression processing, and the like in an image processing unit (not shown), and then exposure means 13Y, 13M, 13C, and 13K are sent as digital image data for each color, and the exposure means 13Y, 13M, 13C, and 13K correspond to the corresponding drum-shaped photoconductors 11Y, 11M, 11C, and 11K as the corresponding first image carriers.
- a latent image of the image data is formed.
- the image forming units 10Y, 10M, 10C, and 10K are arranged in tandem in the vertical direction, and can be rotated by winding rollers 171, 172, 173, and 174 around the left side of the photoreceptors 11Y, 11M, 11C, and 11K in the drawing.
- An intermediate transfer member (hereinafter, also referred to as an intermediate transfer belt) 170 of the present invention which is a semiconductive and seamless belt-like second image carrier stretched on the belt, is disposed.
- the intermediate transfer belt 170 of the present invention is driven in the direction of the arrow through a roller 171 that is rotated by a driving device (not shown).
- the image forming unit 10Y that forms a yellow image includes a charging unit 12Y, an exposure unit 13Y, a developing unit 14Y, a primary transfer roller 15Y as a primary transfer unit, and a cleaning unit 16Y disposed around the photoreceptor 11Y. Have.
- the image forming unit 10M that forms a magenta image includes a photoreceptor 11M, a charging unit 12M, an exposure unit 13M, a developing unit 14M, a primary transfer roller 15M as a primary transfer unit, and a cleaning unit 16M.
- the image forming unit 10C that forms a cyan image includes a photoreceptor 11C, a charging unit 12C, an exposure unit 13C, a developing unit 14C, a primary transfer roller 15C as a primary transfer unit, and a cleaning unit 16C.
- the image forming unit 10K that forms a black image includes a photoreceptor 11K, a charging unit 12K, an exposure unit 13K, a developing unit 14K, a primary transfer roller 15K as a primary transfer unit, and a cleaning unit 16K.
- the toner replenishing means 141Y, 141M, 141C, and 141K replenish new toner to the developing devices 14Y, 14M, 14C, and 14K, respectively.
- the primary transfer rollers 15Y, 15M, 15C, and 15K are selectively operated according to the type of image by a control unit (not shown), and the intermediate transfer belt 170 is respectively applied to the corresponding photoreceptors 11Y, 11M, 11C, and 11K. To transfer the image on the photoreceptor.
- the images of the respective colors formed on the photoreceptors 11Y, 11M, 11C, and 11K by the image forming units 10Y, 10M, 10C, and 10K are rotated by the primary transfer rollers 15Y, 15M, 15C, and 15K.
- the image is sequentially transferred onto the intermediate transfer belt 170, and a combined color image is formed.
- the intermediate transfer belt primarily transfers the toner image carried on the surface of the photosensitive member to the surface, and holds the transferred toner image.
- the transfer material P as a recording medium accommodated in the paper feeding cassette 151 is fed by the paper feeding means 15 and then passed through a plurality of intermediate rollers 122A, 122B, 122C, 122D, and a registration roller 123, and the secondary material P.
- the toner image is conveyed to a secondary transfer roller 117 serving as a transfer unit, and the combined toner image on the intermediate transfer member is collectively transferred onto the transfer material P by the secondary transfer roller 117.
- the toner image held on the intermediate transfer member is secondarily transferred onto the surface of the transfer object.
- the transfer material P onto which the color image has been transferred is fixed by the fixing device 124, sandwiched between the discharge rollers 125, and placed on the discharge tray 126 outside the apparatus.
- Reference numeral 241 denotes a fixing roller.
- the residual toner is removed by the cleaning means 8 from the intermediate transfer belt 170 from which the transfer material P is separated by curvature.
- the intermediate transfer member may be replaced with a rotating drum-like member as described above.
- the primary transfer rollers 15Y, 15M, 15C, and 15K disperse a conductive material such as carbon in a rubber material such as polyurethane, EPDM, or silicone on a peripheral surface of a conductive core metal such as stainless steel having an outer diameter of 8 mm. Or a solid state or foamed sponge state with a volume resistance of about 1 ⁇ 10 5 to 1 ⁇ 10 9 ⁇ ⁇ cm, a thickness of 5 mm, and a rubber elastic modulus of 20 to It is formed by covering a semiconductive elastic rubber of about 70 ° (Asker elastic modulus C).
- a conductive material such as carbon in a rubber material such as polyurethane, EPDM, or silicone on a peripheral surface of a conductive core metal such as stainless steel having an outer diameter of 8 mm.
- the secondary transfer roller 117 disperses a conductive material such as carbon in a rubber material such as polyurethane, EPDM, or silicone on a peripheral surface of a conductive metal core such as stainless steel having an outer diameter of 8 mm, or an ionic conductive material.
- a conductive material such as carbon in a rubber material such as polyurethane, EPDM, or silicone
- a conductive metal core such as stainless steel having an outer diameter of 8 mm
- an ionic conductive material In a solid state or foamed sponge state with a volume resistance of about 1 ⁇ 10 5 to 1 ⁇ 10 9 ⁇ ⁇ cm by including materials, the thickness is 5 mm, and the rubber elastic modulus is about 20 to 70 ° (Asker elasticity It is formed by coating a semiconductive elastic rubber with a rate C).
- the transfer material used in the present invention is a support for holding a toner image, and is usually called an image support, a transfer material, or transfer paper.
- Preferred examples include various kinds of transfer materials such as plain paper from thin paper to thick paper, coated printing paper such as art paper and coated paper, commercially available Japanese paper and postcard paper, plastic film for OHP, and cloth. However, it is not limited to these.
- resin substrate 1 A seamless belt made of polyphenylene sulfide (PPS) containing a conductive material having a thickness of 100 ⁇ m was prepared and referred to as “resin substrate 1”.
- PPS polyphenylene sulfide
- the following intermediate layer mixed gas composition was used as a forming material of the intermediate layer 1.
- the intermediate layer 1 was formed under the following layer formation conditions.
- As the dielectric covering each electrode of the plasma discharge processing apparatus at this time both electrodes facing each other were coated with 1 mm thick alumina by ceramic spraying. The electrode gap after coating was set to 1 mm.
- the metal base material coated with a dielectric is a stainless steel jacket specification having a cooling function by cooling water. During discharge, the metal base material is controlled while controlling the electrode temperature by cooling water, and “intermediate layer 1” (Si x O y) is used. ) was produced.
- the following hard layer mixed gas composition was used as a hard layer forming material.
- the hard layer was formed under the following layer formation conditions.
- As the dielectric covering each electrode of the plasma discharge processing apparatus at this time both electrodes facing each other were coated with 1 mm thick alumina by ceramic spraying. The electrode gap after coating was set to 1 mm.
- the metal base material coated with a dielectric is a stainless steel jacket specification that has a cooling function by cooling water. During discharge, the electrode temperature is controlled by cooling water, and the “hard layer 1” (SiO 2 ) is formed. Produced.
- Discharge gas Nitrogen gas 94.99 volume% Layer formation (raw material) gas: tetraethoxysilane (TEOS) 0.01 vol%
- Additive gas Oxygen gas 5.00% by volume
- intermediate transfer member 16 An “intermediate transfer member 16” was prepared in the same manner except that the intermediate layer 1 was not formed and only the hard layer was formed.
- Intermediate transfer members 22 to 24, 27 were prepared in the same manner except that only the intermediate layer was formed and the hard layer was not formed.
- Table 1 shows the layer thickness, hardness and elastic modulus of the intermediate layer of the intermediate transfer member, and the layer thickness, hardness and elastic modulus of the hard layer.
- the measurement of the layer thickness and the elastic modulus is a value obtained by measurement by the above-described measurement method.
- a two-component developer comprising a toner having a median particle diameter (D 50 ) of 4.5 ⁇ m on a volume basis and a coat carrier of 60 ⁇ m was used.
- the printing environment was 160,000 printed at low temperature and low humidity (10 ° C., 20% RH) and high temperature and high humidity (33 ° C., 80% RH).
- high-quality paper 64 g / m 2 ) of A4 size was used.
- a printed document has a character image with a printing rate of 7% (3 point characters and 5 point characters are 50% each), a color human face image (dot image including a halftone), a solid white image, and a solid image each 1/4.
- the original image (A4 version) in equal parts was used.
- Level 1 No crack at 15 mm rod diameter
- Level 2 No crack at 15 mm rod diameter, no crack at 25 mm
- Level 3 No crack at 25 mm rod diameter, no crack at 45 mm
- Level 4 Rod Cracks occur at a diameter of 45 mm
- Level 5 Cracks occur on a flat surface.
- Evaluation Criteria A Up to 160,000 sheets, no cleaning residual toner is observed on the intermediate transfer member, and there is no image contamination due to poor cleaning in the printed image.
- ⁇ At 160,000 sheets, residual cleaning toner is present on the intermediate transfer member. Although it is recognized, there is no image contamination due to poor cleaning in the printed image
- ⁇ 100,000 remaining, toner remaining after cleaning is recognized on the intermediate transfer member, and there is image contamination due to poor cleaning in the printed image, which is a practical problem .
- Image defects caused by cracks Evaluation of image defects caused by cracks was obtained as follows: after printing 160,000 sheets in a low-temperature and low-humidity (10 ° C., 20% RH) environment, the surface of the intermediate transfer member was visually observed. Evaluation was made based on the degree of occurrence of image defects due to cracks in the printed image.
- Evaluation criteria A There is no occurrence of cracks on the surface of the intermediate transfer member, and there are no image defects caused by cracks.
- ⁇ Although minor cracks can be confirmed on the surface of the intermediate transfer member, no image defects caused by cracks are observed. : Cracks expand and grow on the surface of the intermediate transfer member, and image defects due to the cracks are seen, which is problematic in practical use.
- Toner filming The evaluation of toner filming was performed by printing 160,000 sheets in an environment of high temperature and high humidity (33 ° C., 90% RH), and then visually observing the surface of the intermediate transfer member to determine the state of toner filming and 160,000 sheets. The fog and white streaks generated in the printed image at the time of printing were evaluated.
- Evaluation criteria A No gloss unevenness on the surface of the intermediate transfer member due to toner filming was observed, and no fogging or white streaks due to toner filming occurred in the printed image. No fogging or white streaks were observed in a place corresponding to the fading, or no occurrence of fogging or white streaks was observed on the surface of the intermediate transfer member due to toner filming. Occurred.
- the durability was evaluated by the image density at the end of printing 160,000 sheets at high temperature and high humidity (33 ° C., 80% RH).
- the image density was evaluated by measuring the density of a solid black image portion at 12 points using a reflection densitometer “RD-918” (manufactured by Macbeth).
- ⁇ Practical value when image density is less than 1.20 The level at issue.
- Table 2 shows the layer thickness of the surface layer and the evaluation results.
- the intermediate transfer members of “Examples 1 to 15” of the present invention are any of crack generation, cleaning properties, image defects caused by crack scratches, toner filming, and durability. Although good results were obtained for the evaluation items, the intermediate transfer member of “Comparative Examples 1 to 12” had a problem in any of the evaluation items, and the results were clearly different from the intermediate transfer member of the present invention.
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Abstract
Description
該中間転写体は樹脂基体の外周に弾性層を設け、その上に表面層を設けたものであって、該表面層が中間層と金属酸化物、カーボン含有酸化物、アモルファスカーボンから選択される少なくとも1種を含有する硬質層からなり、該中間層の層厚が100nm以上1000nm以下、硬さが0.1GPa以上2.0GPa以下、弾性率が0.5GPa以上10.0GPa以下であり、該硬質層の層厚が0nm以上50nm以下、硬さが2.0GPa以上10.0GPa以下、弾性率が10.0GPa以上50.0GPa以下であることを特徴とする中間転写体。
本発明において、表面層及び中間層と硬質層の層厚は、「MXP21(マックサイエンス社製)」を用いて測定して得られる値である。層厚の測定は、以下の方法で行うことができる。
本発明において、表面層及び中間層と硬質層の硬さ及び弾性率は、従来公知の硬さ及び弾性率測定方法により求めることができる。好ましくは、オリエンテック社製バイブロンDDV-2を用いて一定の歪みを一定の周波数(Hz)をかけて測定する方法、測定装置としてRSA-II(レメトリックス社製)を用い、透明基体上にセラミック層を形成した後、一定周波数で印加歪を変化させたとき得られる測定値より求める方法、或いは、ナノインデンテーション法を適用したナノインデンター、例えば、MSTシステム社製のナノインデンター「NanoIdenter TMXP/DCM」により測定できる。
H=Pmax/A
ここで、Pは、圧子に加えられた最大荷重であり、Aはそのときの圧子と試料間の接触射影面積である。
A=24.5hc2
ここでhcは、図3に示すように接触点の周辺表面の弾性へこみにより、全体の押し込み深さhより浅くなり、下記式(3)で表される。
hc=h-hs
ここでhsは、弾性によるへこみの量であり、圧子の押し込み後の荷重曲線の勾配(図2の勾配S)と圧子形状から下記式(4)
式(4)
hs=ε×P/S
と表される。
測定機:NANO Indenter XP/DCM(MTS Systems社製)
測定圧子:先端形状が正三角形のダイヤモンドBerkovich圧子
測定環境:20℃、60%RH
測定試料:5cm×5cmの大きさに中間転写体を切断して測定試料を作製
最大荷重設定:25μN
押し込み速度:最大荷重25μNに5secで達する速度で、時間に比例して加重を印加する
尚、測定は各試料ともランダムに10点測定し、その平均値をナノインデンテーション法により測定した硬さ及び弾性率とする。
樹脂基体は、クリーニング部材から中間転写ベルトに加わる負荷で中間転写体が変形することを回避し、転写部への影響を低減させる剛性を有するものである。樹脂基体は、ナノインデンテーション法により測定した弾性率が1.5~15.0GPaの範囲内の材料が好ましい。
弾性層は、トナー像への集中荷重を低減し、トナー像中の文字画像の中抜けが発生するのを防止する目的で設けられる。
表面層は、金属酸化物、カーボン含有酸化金属、アモルファスカーボンを含有する層であることが好ましい。
中間層は、硬質層が割れたり弾性層から剥離したりすることを防止する目的で設けられる。
硬質層は、トナーフィルミングの発生防止、高い転写特性の確保、クリーニング部材により傷発生防止等の目的で設けられる。
中間転写体の樹脂基体としては、樹脂材料に導電性物質を含有させてなるシームレスベルトを用いることができる。
弾性層は、以下のようにして作製することができる。
表面層は、大気圧又はその近傍下の圧力で行われるプラズマCVD(以下、単に大気圧プラズマCVDともいう)法により形成することができる。
印加電源記号 メーカー 周波数 製品名
A1 神鋼電機 3kHz SPG3-4500
A2 神鋼電機 5kHz SPG5-4500
A3 春日電機 15kHz AGI-023
A4 神鋼電機 50kHz SPG50-4500
A5 ハイデン研究所 100kHz* PHF-6k
A6 パール工業 200kHz CF-2000-200k
A7 パール工業 400kHz CF-2000-400k
A8 SEREN IPS 100~460kHz L3001
等の市販のものを挙げることができ、何れも使用することができる。
印加電源記号 メーカー 周波数 製品名
B1 パール工業 800kHz CF-2000-800k
B2 パール工業 2MHz CF-2000-2M
B3 パール工業 13.56MHz CF-5000-13M
B4 パール工業 27MHz CF-2000-27M
B5 パール工業 150MHz CF-2000-150M
B6 パール工業 20~99.9MHz RP-2000-20/100M
等の市販のものを挙げることができ、何れも使用することができる。
表面層の形成に用いられる原料ガスとしては、常温で気体又は液体の有機金属化合物、特にアルキル金属化合物や金属アルコキシド化合物、有機金属錯体化合物が用いられる。これら原料における相状態は常温常圧において必ずしも気相である必要はなく、混合ガス供給装置24で加熱或いは減圧等により溶融、蒸発、昇華等を経て気化し得るものであれば、液相でも固相でも使用可能である。
本発明では、成層時の組成や硬さ及び弾性率、層密度を制御する目的で添加ガスを用いる。
本発明の中間転写体は、電子写真方式の複写機、プリンタ、ファクシミリ等の画像形成方法、画像形成装置に好適に用いられる。
本発明に用いられる転写材としては、トナー画像を保持する支持体で、通常画像支持体、転写材或いは転写紙といわれるものである。好ましくは薄紙から厚紙までの普通紙、アート紙やコート紙等の塗工された印刷用紙、市販されている和紙やはがき用紙、OHP用のプラスチックフィルム、布等の各種転写材を挙げることができるが、これらに限定されるものではない。
以下の手順で実施例及び比較例の中間転写体を作製した。
(樹脂基体1の準備)
厚さ100μmの導電性物質を含有するポリフェニレンサルファイド(PPS)からなるシームレスベルトを準備し「樹脂基体1」とした。
(弾性層1の作製)
上記で準備した「樹脂基体1」の外周に、クロロプレンゴムからなる厚さ150μmの「弾性層1」をディッピング塗布法により設けた。
次に、上記の「弾性層1」の上に、図5のプラズマ放電処理装置を用いて、「中間層1」を形成した。
放電ガス:窒素ガス 94.85体積%
層形成(原料)ガス:ヘキサメチルジシロキサン 0.15体積%
添加ガス:酸素ガス 5.00体積%
各原料ガスは、加熱することで蒸気を生成し、あらかじめ原料が凝集しないように余熱を行った放電ガス及び反応ガスと混合・希釈した後、放電空間への供給を行った。
第1電極側電源類
ハイデン研究所社製高周波電源100kHz(連続モード)PHF-6k
周波数 100kHz
出力密度 10W/cm2(このときの電圧Vpは7kVであった)
電極温度 70℃
第2電極側電源類
パール工業社製高周波電源13.56MHz CF-5000-13M
周波数 13.56MHz
出力密度 5W/cm2(このときの電圧Vpは1kVであった)
電極温度 70℃
(硬質層1の作製)
次に、上記の「中間層1」の上に、図5の大気圧プラズCVD装置を用いて、「硬質層1」を形成した。
放電ガス:窒素ガス 94.99体積%
層形成(原料)ガス:テトラエトキシシラン(TEOS)0.01体積%
添加ガス:酸素ガス 5.00体積%
各原料ガスは、加熱することで蒸気を生成し、あらかじめ原料が凝集しないように余熱を行った放電ガス及び原料ガスと混合・希釈した後、放電空間への供給を行った。
第1電極側電源類
ハイデン研究所社製高周波電源100kHz(連続モード)PHF-6k
周波数 100kHz
出力密度 10W/cm2(このときの電圧Vpは7kVであった)
電極温度 70℃
第2電極側電源類
パール工業社製高周波電源13.56MHz CF-5000-13M
周波数 13.56MHz
出力密度 10W/cm2(このときの電圧Vpは2kVであった)
電極温度 70℃
〈中間転写体2~15、17~21、25、26の作製〉
中間転写体1の作製において、中間層1の形成及び硬質層1の作製条件を、表1の層厚、硬さ及び弾性率になるように変更した以外は同様にして「中間転写体2~15、17~21、25、26」を作製した。
中間層1の作製で、中間層を形成せず、硬質層のみ形成した以外は同様にして「中間転写体16」を作製した。
中間層1の作製で、中間層の形成のみで、硬質層を形成しなかった以外は同様にして「中間転写体22~24、27」を作製した。
〈画像形成装置〉
上記で作製した中間転写体の評価は、画像形成装置「bizhub PRO C6500(コニカミノルタビジネステクノロジーズ社製)」に装着して行った。
(クラックの発生)
クラックの発生は、常温常湿(20℃、50%RH)環境で、中間転写体の裏側に径の異なる丸棒に中間転写体の樹脂基体側の裏面を沿わせ、中間転写体の表面層側の表面を顕微鏡で観察し、クラックの発生状況で評価した。尚、レベル1とレベル2を合格とする。
レベル2:棒の径15mmでクラック発生、25mmでクラック発生せず
レベル3:棒の径25mmでクラック発生、45mmでクラック発生せず
レベル4:棒の径45mmでクラック発生
レベル5:平面でクラック発生。
クリーニング性の評価は、低温低湿(10℃、20%RH)環境でプリントを行い、クリーニングした後の中間転写体の表面を目視観察し、その表面に残存するトナーの程度と、プリントして得られたプリント画像にクリーニング不良に起因する画像汚れの発生程度で評価した。
◎:16万枚まで、中間転写体上にクリーニング残トナーが認められず、プリント画像にもクリーニング不良に起因する画像汚れなし
○:16万枚で、中間転写体上にクリーニング残トナーが認められるが、プリント画像にクリーニング不良に起因する画像汚れなし
×:10万枚で、中間転写体上にクリーニング残トナーが認められ、プリント画像にもクリーニング不良に起因する画像汚れが有り実用上問題。
クラックに起因する画像欠陥の評価は、低温低湿(10℃、20%RH)環境で16万枚プリントを行った後、中間転写体の表面を目視観察してクラックの発生程度と、得られたプリント画像にクラック傷に起因する画像欠陥の発生程度で評価した。
◎:中間転写体表面にクラックの発生がなく、クラック傷に起因する画像欠陥も無い
○:中間転写体表面に軽微なクラックが確認できるが、クラックに起因する画像欠陥が見られず
×:中間転写体表面にクラックが拡大成長し、クラックに起因する画像欠陥が見られ、実用上問題有り。
トナーフィルミングの評価は、高温高湿(33℃、90%RH)の環境下で16万枚のプリントを行った後、中間転写体表面を目視観察しトナーフィルミングの状態と、16万枚プリント時のプリント画像に発生したかぶりと白すじで評価した。
◎:トナーフィルミングによる中間転写体表面の光沢むらが全く認められず、プリント画像にトナーフィルミングによるかぶりや白すじは発生しなかった
○:トナーフィルミングによる中間転写体表面の光沢むらがかすかに認められたか、それに対応した場所にかぶりや白すじの発生が認められなかった
×:トナーフィルミングによる中間転写体表面の光沢むらが認められ、それに対応した場所にかぶりや白すじが発生した。
耐久性の評価は、高温高湿(33℃、80%RH)で16万枚プリント終了時の画像濃度で評価した。
◎:画像濃度が、1.35以上で優れている
○:画像濃度が、1.20以上、1.35未満で実用上問題ないレベル
×:画像濃度が、1.20未満で実用上問題となるレベル。
175 樹脂基体
176 弾性層
177 表面層
178 中間層
178a 中間層の1層目
178b 中間層の2層目
178c 中間層の3層目
179 硬質層
Claims (6)
- 電子写真感光体の表面に担持されたトナー像を中間転写体に1次転写した後、該中間転写体から該トナー像を転写材に2次転写する手段を有する画像形成装置に用いる中間転写体において、
該中間転写体は樹脂基体の外周に弾性層を設け、その上に表面層を設けたものであって、該表面層が中間層と金属酸化物、カーボン含有酸化物、アモルファスカーボンから選択される少なくとも1種を含有する硬質層からなり、該中間層の層厚が100nm以上1000nm以下、硬さが0.1GPa以上2.0GPa以下、弾性率が0.5GPa以上10.0GPa以下であり、該硬質層の層厚が0nm以上50nm以下、硬さが2.0GPa以上10.0GPa以下、弾性率が10.0GPa以上50.0GPa以下であることを特徴とする中間転写体。 - 前記表面層が、金属酸化物を1種類以上含有する層を積層して形成されたものであることを特徴とする請求項1に記載の中間転写体。
- 前記表面層が、酸化ケイ素を主成分とする層であることを特徴とする請求項1又は2に記載の中間転写体。
- 前記表面層が、異なる周波数の電界を2つ以上印加した大気圧又はその近傍下の圧力で行われるプラズマCVDによって作製されたものであることを特徴とする請求項1~3の何れか1項に記載の中間転写体。
- 前記弾性層が、クロロプレンゴム、ニトリルゴム、スチレン-ブタジエンゴム、シリコーンゴム、ウレタンゴム、エチレン-プロピレン共重合体のうち少なくとも1つから形成された層であることを特徴とする請求項1~4の何れか1項に記載の中間転写体。
- 前記樹脂基体が、ポリイミド、ポリカーボネート、ポリフェニレンサルファイド、ポリエチレンテレフタレートのうち少なくとも1つから形成されたものであることを特徴とする請求項1~5の何れか1項に記載の中間転写体。
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- 2010-02-17 JP JP2011503753A patent/JPWO2010103896A1/ja active Pending
- 2010-02-17 CN CN201080011191.1A patent/CN102349029B/zh active Active
- 2010-02-17 WO PCT/JP2010/052330 patent/WO2010103896A1/ja active Application Filing
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Cited By (6)
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JP2018040862A (ja) * | 2016-09-06 | 2018-03-15 | コニカミノルタ株式会社 | 画像形成装置及びクリーニング装置 |
JP2019031041A (ja) * | 2017-08-09 | 2019-02-28 | 日東電工株式会社 | 転写用導電性フィルム |
JP6995527B2 (ja) | 2017-08-09 | 2022-01-14 | 日東電工株式会社 | 転写用導電性フィルム |
US10768557B2 (en) | 2018-12-20 | 2020-09-08 | Canon Kabushiki Kaisha | Intermediary transfer belt and image forming apparatus |
CN110965046A (zh) * | 2019-12-31 | 2020-04-07 | 威海中玻新材料技术研发有限公司 | 超薄液膜旋离式汽化装置 |
CN110965046B (zh) * | 2019-12-31 | 2024-05-28 | 威海中玻新材料技术研发有限公司 | 超薄液膜旋离式汽化装置 |
Also Published As
Publication number | Publication date |
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JPWO2010103896A1 (ja) | 2012-09-13 |
CN102349029B (zh) | 2014-10-29 |
CN102349029A (zh) | 2012-02-08 |
US20120027473A1 (en) | 2012-02-02 |
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