WO2012090418A1 - 現像ローラ、プロセスカートリッジおよび電子写真装置 - Google Patents
現像ローラ、プロセスカートリッジおよび電子写真装置 Download PDFInfo
- Publication number
- WO2012090418A1 WO2012090418A1 PCT/JP2011/007035 JP2011007035W WO2012090418A1 WO 2012090418 A1 WO2012090418 A1 WO 2012090418A1 JP 2011007035 W JP2011007035 W JP 2011007035W WO 2012090418 A1 WO2012090418 A1 WO 2012090418A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- developing roller
- surface layer
- structural formula
- elastic layer
- toner
- Prior art date
Links
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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
- G03G15/0818—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the structure of the donor member, e.g. surface properties
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
-
- 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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49544—Roller making
Definitions
- the present invention relates to a developing roller used in an electrophotographic apparatus, a process cartridge having the developing roller, and an electrophotographic apparatus.
- an electrophotographic photosensitive member (hereinafter also referred to as “photosensitive member”) is charged by charging means and exposed by a laser or the like.
- An electrostatic latent image is formed on the photoreceptor.
- the toner in the developing container is applied onto the developing roller by the toner supply roller and the toner regulating member.
- the electrostatic latent image on the photosensitive member is developed by the toner conveyed to the developing region by the developing roller at the contact portion or the proximity portion between the photosensitive member and the developing roller.
- the toner on the photoconductor is transferred onto a recording sheet by a transfer unit and fixed by heat and pressure, and the toner remaining on the photoconductor is removed by a cleaning blade.
- an elastic roller having an electric resistance of 10 3 to 10 10 ⁇ ⁇ cm is generally used. Further, in view of the demand for higher durability of the developing roller and higher image quality of the electrophotographic image, a developing roller having a surface layer on the surface of the elastic layer has been used. ing.
- the elastic layer of the developing roller silicone rubber excellent in deformation recovery and flexibility is preferably used.
- the surface layer polyurethane having excellent abrasion resistance and charge imparting property to the toner is used.
- Patent Document 1 discloses a method in which a polytetramethylene glycol-based polyurethane surface layer having a specific composition is provided on a silicone rubber elastic layer to suppress adverse effects in various temperature and humidity environments.
- Patent Document 2 discloses that the fusion of the low melting point toner can be suppressed by the composition of the polyether-based polyurethane surface layer.
- Patent Document 3 discloses a developing roller using a polyurethane surface layer having a low water absorption rate in order to maintain charging characteristics in a high temperature and high humidity environment.
- the developing rollers according to Patent Documents 1 to 3 having an elastic layer containing silicone rubber are long in a high temperature and high humidity environment at a temperature of 40 ° C. and a relative humidity of 95%. When left for a period, the surface layer sometimes peeled off from the silicone rubber elastic layer. Further, in the developing rollers according to Patent Documents 1 to 3, the toner is firmly fixed on the surface thereof, and density unevenness due to the fixed matter of the toner may occur in the electrophotographic image.
- the object of the present invention is to form a high-quality electrophotographic image in which peeling of the surface layer from the elastic layer is suppressed even when stored and used in a high-temperature and high-humidity environment, and the toner hardly adheres to the surface. It is to provide a developing roller that contributes.
- Another object of the present invention is to provide an electrophotographic image forming apparatus capable of stably outputting high-quality electrophotographic images and a process cartridge used therefor.
- the present inventors have intensively studied to achieve the above object.
- the surface layer containing a polyurethane resin having a specific structure was found to be excellent in adhesiveness with the silicone rubber elastic layer, and the toner was hardly fixed on the surface, and the present invention was achieved.
- the shaft core body, the elastic layer, and the surface layer covering the surface of the elastic layer are included, and the elastic layer includes a cured product of addition-curable dimethyl silicone rubber.
- the surface layer contains a urethane resin, and the urethane resin has a structure represented by the following structural formula (1), a structure represented by the following structural formula (2), and the following structure between two adjacent urethane bonds.
- a developing roller having at least one structure selected from the group consisting of structures represented by formula (3).
- a process cartridge having at least a developing roller attached thereto and detachable from an electrophotographic apparatus, wherein the developing roller is the above-described developing roller.
- an electrophotographic apparatus comprising a developing roller and an electrophotographic photosensitive member disposed in contact with the developing roller.
- a surface layer containing a urethane resin having a specific structural unit when stored in a high temperature and high humidity environment for a long time, both the peeling of the surface layer and the fixing of the toner can be suppressed at a high level, and a developing roller that contributes to the formation of a high-quality electrophotographic image can be obtained.
- a process cartridge and an electrophotographic apparatus that can stably form a high-quality electrophotographic image can be obtained.
- FIG. 1 shows an embodiment of the developing roller 1 according to the present invention.
- the developing roller 1 shown in FIG. 1 has an elastic layer 3 formed on the outer peripheral surface of a cylindrical or hollow cylindrical conductive shaft core 2.
- the surface layer 4 covers the outer peripheral surface of the elastic layer 3.
- the shaft core body 2 functions as an electrode and a support member of the developing roller 1, and is a metal or alloy such as aluminum, copper alloy, or stainless steel; iron plated with chromium or nickel; It is made of a conductive material such as resin.
- the elastic layer 3 gives the developing roller elasticity necessary for forming a nip having a predetermined width at the contact portion between the developing roller and the photosensitive member.
- the elastic layer 3 includes a cured product of addition-curable dimethyl silicone rubber that gives the elastic layer high recovery from deformation and high flexibility.
- the elastic layer 3 preferably has a water absorption rate of 0.10% or less, more preferably 0.02% or more and 0.10% or less based on the Japanese Industrial Standard (JIS) K7209 A method. .
- JIS Japanese Industrial Standard
- addition-curable dimethyl silicone rubber examples include the following. Polydimethylsiloxane, polymethylvinylsiloxane, polyphenylvinylsiloxane, polymethoxymethylsiloxane, polyethoxymethylsiloxane, and copolymers of these polysiloxanes.
- the elastic layer 3 can contain conductive fine particles.
- conductive fine particles carbon black or conductive metal such as aluminum or copper; fine particles of conductive metal oxide such as zinc oxide, tin oxide, or titanium oxide can be used. Carbon black is particularly preferred because good conductivity can be obtained with a relatively low addition amount.
- the conductive particles In order to reduce the water absorption rate of the elastic layer 3, it is preferable to use those having a low affinity for water among the conductive fine particles as described above.
- carbon black when carbon black is used as the conductive particles, it is preferable to select carbon black having a relatively large primary particle size and a nonpolarized surface.
- the primary particle diameter is in the range of 30 nm or more and 60 nm or less, and the surface characteristics are neutral or hydrophobized, that is, pH value.
- a carbon black having an A of 5.0 or more and 8.0 or less is preferably used.
- the content is about 5 to 20 parts by mass with respect to 100 parts by mass of the silicone rubber in the elastic layer.
- various additives such as a nonconductive filler, a crosslinking agent, and a catalyst may be appropriately contained in addition to the conductive fine particles.
- the urethane resin contained in the surface layer 4 has a structure represented by the following structural formula (1), a structure represented by the following structural formula (2), and the following structural formula (3) between adjacent urethane bonds.
- FIG. 5 and 6 show a part of the characteristic structure of the urethane resin according to the present invention.
- the structure represented by the structural formula (1) and the structure represented by the structural formula (2) are sandwiched between adjacent urethane bonds A1 and A2.
- the structure represented by the structural formula (1) and the structural formula (1) are defined by the adjacent urethane bonds B1 and B2 and the adjacent urethane bonds C1 and C2.
- the structure shown in 2) is sandwiched.
- the adhesion between synthetic resins depends mainly on the interaction of polar functional groups such as hydrogen bonds and acid-base interactions in addition to chemical bonds.
- silicone rubber is very low in polarity and its surface is inert.
- the elastic layer and the surface layer according to the present invention exhibit good adhesion even when left for a long time in a severe high temperature and high humidity environment.
- the urethane resin having a structure has a very low polarity as a polyurethane by introducing a methyl group into the side chain as compared with a conventional polyether polyurethane.
- the cured product of addition-curing dimethyl silicone rubber has a “spiral” molecular structure in which there are six siloxane (Si—O) bonds and one rotation, and the methyl group is oriented outward. It is known that That is, the surface of the silicone rubber polymer chain is substantially covered with a hydrophobic methyl group.
- hydrophobicity is present between the methyl group on the surface of the silicone rubber in the elastic layer according to the present invention and the methyl group as a side chain introduced between two adjacent urethane bonds in the urethane resin in the surface layer.
- the attractive force acting between the molecules is acting.
- the polyurethane according to the present invention contains a polyether component represented by the structural formula (1) and is excellent in flexibility.
- the crystallinity in the low temperature range is remarkably lowered. Yes. Therefore, the developing roller having a surface layer containing polyurethane according to the present invention is flexible even in a low-temperature environment and hard to increase hardness, and even under a low-temperature environment, the stress applied to the toner is low and filming occurs. It will be difficult.
- the polyurethane according to the present invention has a structure represented by the structural formula (2) or (3) having a higher hydrophobicity than the structure represented by the structural formula (1) in the molecule, so that the water of the urethane resin itself can be obtained.
- the urethane resin can have a relatively low water absorption.
- the molecular mobility in the high temperature range is suppressed by the presence of the methyl group as a side chain in the structure represented by the structural formula (2) or (3). For this reason, the surface of the developing roller according to the present invention is less likely to increase the adhesiveness even in a high temperature and high humidity environment, and the sticking of toner to the developing roller surface in a high temperature and high humidity environment can be effectively suppressed.
- the structure represented by the structural formula (1) and at least one selected from the group consisting of the structures represented by the structural formula (2) and the structural formula (3) are randomly copolymerized. Is preferred. The reason is that the crystallinity reducing effect in the low temperature region and the molecular mobility suppressing effect in the high temperature region are higher.
- the molar ratio of the structure of the structural formula (1) “the molar ratio with at least one structure selected from the structural formula (2) or (3)” is 80:20 or more and 50:50 or less. Preferably there is.
- the molar ratio of the structure of each chemical formula is within this range, a more excellent suppression effect can be obtained in terms of both toner adhesion on the surface and peeling of the surface layer.
- flexibility in a low temperature range durability also becomes favorable.
- the polyurethane contained in the surface layer is obtained by reacting the structure of the structural formula (1) with the polyether diol having at least one structure selected from the structural formulas (2) and (3) or the polyether diol and an aromatic diisocyanate. It is preferable that the polymer be obtained by thermosetting the hydroxyl group-terminated prepolymer and the isocyanate group-terminated prepolymer obtained by reacting the polyether diol and aromatic isocyanate.
- polyurethane Usually, the following methods are used for the synthesis of polyurethane. ⁇ One shot method in which polyol component and polyisocyanate component are mixed and reacted, A method of reacting an isocyanate group-terminated prepolymer obtained by reacting a part of polyol with isocyanate and a chain extender such as low molecular diol or low molecular triol.
- polyether diol having the structure of the structural formula (1) and at least one structure selected from the structural formulas (2) and (3) is a low-polarity material. Therefore, the compatibility with a highly polar isocyanate is low, and the phase is easily microscopically separated into a part having a high polyol ratio and a part having a high isocyanate ratio in the system. Unreacted components are likely to remain in the portion where the ratio of polyol is high, and the remaining unreacted polyol may ooze out and cause surface toner fixation.
- a structure of structural formula (1), a polyether diol having at least one structure selected from structural formulas (2) and (3), or a hydroxyl group-terminated prepolymer obtained by reacting the polyether diol with an aromatic diisocyanate By thermally curing an isocyanate group-terminated prepolymer obtained by reacting a polyether diol and an aromatic isocyanate, the polarity difference between the polyol and the isocyanate can be reduced. Therefore, the compatibility between the polyol and the isocyanate is improved, and a polyurethane having a lower polarity can be obtained with a smaller isocyanate ratio than the conventional example. Furthermore, since it is possible to keep the unreacted polyol remaining very low, it is possible to suppress surface toner adhesion due to seepage of the unreacted polyol.
- the number average molecular weight of the prepolymer is: 10,000 or more and 15000 or less are preferable.
- the isocyanate content of the prepolymer is preferably in the range of 3.0% by mass to 4.0% by mass.
- the molecular weight of the hydroxyl group-terminated prepolymer and the isocyanate content of the isocyanate group-terminated prepolymer are within this range, the resulting polyurethane has a good balance of water absorption and residual reaction suppression of unreacted components, and toner adhesion and surface layer peeling. It is possible to achieve both at a higher level in the effect of suppressing the above.
- the polyurethane according to the present invention is more preferably one obtained by thermally curing the hydroxyl group-terminated prepolymer (a) below and the isocyanate group-terminated prepolymer (b) below.
- A Number of reaction between a polyether diol having a number average molecular weight of 2000 or more and 3000 or less and an aromatic diisocyanate comprising the structure of the structural formula (1) and at least one structure selected from the structural formulas (2) and (3) Hydroxyl-terminated prepolymer having an average molecular weight of 10000 to 15000
- a polymer having a number average molecular weight of 2,000 to 3,000 comprising at least one structure selected from the structure of the structural formula (1) and the structural formulas (2) and (3) Isocyanate group-terminated prepolymer obtained by reacting ether diol with aromatic isocyanate
- the polyether diol having a number average molecular weight of 2000 or more and 3000 or less is used as a raw material for the hydroxyl group-terminated prepolymer and the isocyanate group-terminated prepolymer, the water absorption of the finally obtained polyurethane can be reduced, and unreacted Residual components can be suppressed. Furthermore, since the strength and adhesiveness of the surface layer are excellent, the durability can be improved.
- Aliphatic polyesters include 1,4-butanediol, 3-methyl-1.5-pentanediol, diol components such as neopentyl glycol, triol components such as trimethylolpropane, adipic acid, glutaric acid, sebacic acid, etc. Aliphatic polyester polyols obtained by condensation reaction with dicarboxylic acids.
- polyol components may be prepolymers that are chain-extended with an isocyanate such as 2,4-tolylene diisocyanate (TDI), 1,4 diphenylmethane diisocyanate (MDI), or isophorone diisocyanate (IPDI) as required.
- isocyanate such as 2,4-tolylene diisocyanate (TDI), 1,4 diphenylmethane diisocyanate (MDI), or isophorone diisocyanate (IPDI) as required.
- TDI 2,4-tolylene diisocyanate
- MDI 1,4 diphenylmethane diisocyanate
- IPDI isophorone diisocyanate
- Components other than the structure of the structural formula (1) and at least one structure selected from the structural formulas (2) and (3) have a content of 20% by mass or less in the polyurethane from the viewpoint of the effect of the present invention. It is preferable to do.
- Isocyanate compounds to be reacted with these polyol components are not particularly limited, but aliphatic polyisocyanates such as ethylene diisocyanate, 1,6-hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), cyclohexane 1, 3-diisocyanates, cycloaliphatic polyisocyanates such as cyclohexane 1,4-diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate (TDI), 4,4'-diphenylmethane diisocyanate (MDI), polymeric diphenylmethane Aromatic isocyanates such as diisocyanate, xylylene diisocyanate, naphthalene diisocyanate, copolymers thereof, isocyanurates, and TMP adducts It can be used biuret, the block body.
- aliphatic polyisocyanates
- aromatic isocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, and polymeric diphenylmethane diisocyanate are more preferably used.
- a polyurethane obtained by reacting a structural component (1) with a polyether component having at least one structure selected from structural formulas (2) and (3) between an aromatic isocyanate and a urethane bond is flexible. In addition, it is excellent in strength and has low adhesiveness under high temperature and high humidity, which is preferable.
- the mixing ratio of the isocyanate compound to be reacted with the polyol component is preferably such that the ratio of isocyanate groups to 1.2 to 4.0 with respect to 1.0 hydroxyl groups of the polyol.
- the surface layer 4 preferably has conductivity.
- the conductivity imparting means include addition of an ionic conductive agent and conductive fine particles.
- conductive fine particles which are inexpensive and have little resistance fluctuation in the environment are preferably used, and carbon is used from the viewpoint of conductivity imparting and reinforcing properties. Black is particularly preferred.
- carbon black having a primary particle diameter of 18 nm to 50 nm and a DBP oil absorption of 50 ml / 100 g to 160 ml / 100 g has a balance of conductivity, hardness and dispersibility. Good and preferred.
- the content rate of electroconductive fine particles is 10 to 30 mass% with respect to 100 mass parts of resin components which form a surface layer.
- fine particles for controlling the roughness may be added to the surface layer 4.
- the fine particles for roughness control preferably have a volume average particle size of 3 to 20 ⁇ m.
- the amount of particles added to the surface layer is preferably 1 to 50 parts by mass with respect to 100 parts by mass of the resin solid content of the surface layer.
- fine particles for roughness control fine particles of polyurethane resin, polyester resin, polyether resin, polyamide resin, acrylic resin, and phenol resin can be used.
- the method for forming the surface layer 4 is not particularly limited, and examples thereof include spraying with paint, immersion, or roll coating.
- the method of overflowing the paint from the upper end of the dip tank as described in JP-A-57-5047 is simple and excellent in production stability as a method for forming the surface layer.
- FIG. 4 is a schematic view of a dip coating apparatus.
- a cylindrical immersion tank 25 has an inner diameter slightly larger than the outer diameter of the developing roller and a depth larger than the axial length of the developing roller.
- An annular liquid receiving portion is provided on the outer periphery of the upper edge of the immersion tank 25 and is connected to the stirring tank 27.
- the bottom of the immersion tank 25 is connected to the stirring tank 27.
- the paint in the stirring tank 27 is fed to the bottom of the immersion tank 25 by the liquid feed pump 26.
- the paint overflows from the upper end of the immersion tank and returns to the agitation tank 27 via the liquid receiving part on the outer periphery of the upper edge of the immersion tank 25.
- the core body 2 provided with the elastic layer 3 is fixed vertically to the elevating device 28, immersed in the immersion tank 25, and pulled up to form the surface layer 4.
- the developing roller of the present invention can be applied to any one of a non-contact developing device and a contact developing device using a magnetic one-component developer or a non-magnetic one-component developer, a developing device using a two-component developer, and the like. Can do.
- FIG. 2 is a sectional view of the process cartridge according to the present invention.
- the developing roller 1, the developing blade 21, the developing device 22, the electrophotographic photosensitive member 18, the cleaning blade 26, the waste toner container 25, and the charging roller 24 are integrated, and the electrophotographic process is performed.
- the main body of the image forming apparatus is detachable.
- the developing device 22 includes a toner container 20, and the toner container 20 is filled with toner 20a.
- the toner 20 a in the toner container 20 is supplied to the surface of the developing roller 1 by the toner supply roller 19, and a layer of toner 20 a having a predetermined thickness is formed on the surface of the developing roller 1 by the developing blade 21.
- FIG. 3 is a cross-sectional view of an electrophotographic apparatus using the developing roller according to the present invention.
- a developing device 22 including a developing roller 1, a toner supply roller 19, a toner container 20, and a developing blade 21 is detachably mounted.
- the photoconductor 18 rotates in the direction of the arrow, is uniformly charged by a charging roller 24 for charging the photoconductor 18, and the surface of the photoconductor 18 is exposed by laser light 23 that is an exposure means for writing an electrostatic latent image on the photoconductor 18.
- An electrostatic latent image is formed.
- the electrostatic latent image is developed by applying the toner 20a by the developing device 22 disposed in contact with the photoconductor 18, and visualized as a toner image.
- the visualized toner image on the photoconductor 18 is transferred to a paper 34 as a recording medium by a transfer roller 29 as a transfer member.
- the paper 34 is fed into the apparatus through a paper feed roller 35 and a suction roller 36, and is transported between the photoconductor 18 and the transfer roller 29 by an endless belt-shaped transfer transport belt 32.
- the transfer / conveying belt 32 is operated by a driven roller 33, a driving roller 28, and a tension roller 31.
- a voltage is applied to the transfer roller 29 and the suction roller 36 from a bias power source 30.
- the paper 34 to which the toner image has been transferred is subjected to fixing processing by the fixing device 27, discharged outside the device, and the printing operation is completed.
- the untransferred toner remaining on the photosensitive member 18 without being transferred is scraped off by a cleaning blade 26 which is a cleaning member for cleaning the surface of the photosensitive member, and is stored in a waste toner container 25 and cleaned.
- the body 18 repeats the above action.
- the developing device 22 is a toner container 20 that contains toner 20a as a one-component developer, and a developer carrier that is located in an opening extending in the longitudinal direction in the toner container 20 and is opposed to the photoconductor 18. And a developing roller 1.
- the developing device 22 develops and visualizes the electrostatic latent image on the photoreceptor 18.
- the shaft core 2 was prepared by applying a primer (trade name, DY35-051; manufactured by Toray Dow Corning Co.) to a 6 mm diameter core metal made of SUS304 and baking it.
- a primer trade name, DY35-051; manufactured by Toray Dow Corning Co.
- the mold was heated to cure and cure the silicone rubber at a temperature of 150 ° C. for 15 minutes.
- the core metal was further heated at a temperature of 180 ° C. for 1 hour to complete the curing reaction of the silicone rubber layer. .
- an elastic roller C-1 having a silicone rubber elastic layer having a diameter of 12 mm formed on the outer periphery of the shaft core body 2 was produced.
- Elastic roller C-2 was prepared in the same manner as elastic roller C-1, except that carbon black was changed to 10 parts by mass of Toka Black # 4400 (trade name; manufactured by Tokai Carbon Co., Ltd.).
- Elastic roller C-3 Elastic roller C-3 was prepared in the same manner as elastic roller C-1, except that the amount of carbon black was changed to 5 parts by mass.
- the elastic roller C-1 is the same as the elastic roller C-1, except that the amount of carbon black is changed to 10 parts by mass, and the heat resistance imparting agent and the addition amount thereof are changed to 5 parts by mass of the hydrophobized silica powder. -4 was created.
- Elastic roller C-5 was prepared in the same manner as elastic roller C-2 except that the amount of carbon black was changed to 12 parts by mass.
- Elastic roller C-6 was prepared in the same manner as elastic roller C-1, except that the types and amounts of carbon black and silica powder were changed as shown in Table 2 below.
- TSK standard polystyrenes A-1000, A-2500, A-5000, F-1, F-2, F-4, F-10, F-20, F-40, F- 80, F-128 (manufactured by Tosoh Corporation) was used to prepare a calibration curve.
- the weight average molecular weight was determined from the retention time of the measurement sample obtained based on this.
- Polyether diols A-2 to A-6 were obtained under the same conditions except that the molar mixing ratio of dry tetrahydrofuran and dry 3-methyltetrahydrofuran and the reaction time were changed as shown in Table 4 below.
- Example 1 Below, the manufacturing method of the developing roller of this invention is demonstrated.
- methyl ethyl ketone (hereinafter referred to as MEK) was added so that the total solid content ratio was 30% by mass, followed by mixing with a sand mill.
- the surface layer-forming coating material was prepared by adjusting the viscosity to 10 to 13 cps with MEK.
- the previously prepared elastic roller C-2 was dipped in the surface layer forming paint to form a coating film of the paint on the surface of the elastic layer of the elastic roller C-2 and dried. Further, a surface layer having a film thickness of about 20 ⁇ m was provided on the outer periphery of the elastic layer by heat treatment at a temperature of 150 ° C. for 1 hour, and a developing roller according to Example 1 was produced.
- the surface layer of the present invention has a structure represented by the structural formula (1) and one or both structures selected from the structure represented by the structural formula (2) and the structure represented by the structural formula (3). This can be confirmed by, for example, analysis by pyrolysis GC / MS, FT-IR or NMR.
- a pyrolysis apparatus (trade name: Pyrofoil Sampler JPS-700, manufactured by Nippon Analytical Industrial Co., Ltd.) and a GC / MS apparatus (trade name: Focus GC / ISQ, Thermo Fisher Scientific)
- the thermal decomposition temperature was 590 ° C.
- helium was used as the carrier gas for analysis.
- a structure represented by the structural formula (1) and one or both structures selected from the structure represented by the structural formula (2) and the structure represented by the structural formula (3) are obtained. It was confirmed to have.
- the peeled surface was observed. Except for the portion (cohesive failure) broken inside the elastic layer or surface layer, the evaluation of surface layer peeling was made according to the following criteria. A: No peeling at the interface between the surface layer and the elastic layer is observed at all B: Peeling at the interface between the surface layer and the elastic layer is observed within the range of 20% or less in the peeling surface, but C is at a level that does not cause any problem in use. Peeling at the interface between the surface layer and the elastic layer is observed on most or the front side of the peeling surface
- the surface hardness of the developing roller was measured with a micro rubber hardness meter (trade name: MD-1capa, manufactured by Kobunshi Keiki Co., Ltd.) using a 0.16 mm diameter pusher needle at a temperature of 25 ° C. and a relative humidity of 50% RH. The average value obtained by measuring three points at the center, the upper end, and the lower end of the developing roller after forming the conductive resin layer was used.
- MD-1capa manufactured by Kobunshi Keiki Co., Ltd.
- the filming was evaluated by loading the developing roller of this example into a laser printer (trade name: LBP5300; manufactured by Canon Inc.) having the configuration as shown in FIG. That is, in an environment (hereinafter referred to as L / L) having an air temperature of 15 ° C. and a relative humidity of 10% RH, the letter “E”, which is 4 points in size, is printed on A4 size paper using black toner and the printing rate is 1%.
- An electrophotographic image was printed continuously. The surface of the developing roller was visually observed each time 1000 sheets were printed, and the number of images printed at the time when it was confirmed that the black toner was fixed on the surface of the developing roller was defined as the number of filming occurrences.
- This developing roller is placed on a flat plate made of polytetrafluoroethylene, and the developing roller is pressed against the flat plate with a load of 300 gf (each 150 gf load at both ends of the shaft core), and the temperature is 40 ° C. and the relative humidity is 95% RH. It was left for 60 days in the environment.
- the developing roller was released from the pressure contact state with respect to the flat plate and allowed to stand in an environment of a temperature of 25 ° C. and a relative humidity of 45% for 3 hours, and then the surface of the developing roller was blown with air.
- the toner fixed on the developing roller was peeled off using an adhesive tape.
- the adhesive tape with the yellow toner adhered was placed on plain paper, and the reflection density was measured using a reflection densitometer (trade name: TC-6DS / A, manufactured by Tokyo Denshoku Co., Ltd.).
- a reflection densitometer (trade name: TC-6DS / A, manufactured by Tokyo Denshoku Co., Ltd.).
- TC-6DS / A manufactured by Tokyo Denshoku Co., Ltd.
- the amount of decrease in reflectance (%) was calculated based on the reflection density of the adhesive tape to which no toner adhered. This measurement was performed at a total of three points at the center and both ends of the developing roller, and the arithmetic average value was defined as the toner fixing density of the developing roller to be evaluated.
- JIS Japanese Industrial Standard
- Examples 2 to 19 A coating material for forming a surface layer was prepared in the same manner as in Example 1 except that the material shown in Table 8 below was used as a raw material for the surface layer 4. Then, each coating material was applied, dried and heated to the elastic roller shown in Table 8 in the same manner as in Example 1 to produce developing rollers according to Examples 2 to 19.
- the surface layer forming paint according to Comparative Example 1 was prepared in the same manner as the method for preparing the surface layer forming paint according to Example 1.
- this surface layer forming coating material was coated on the surface of the elastic rubber layer of the elastic roller C-1 and dried to form a surface layer, whereby a developing roller of Comparative Example 1 was prepared.
- the surface layer forming paint according to Comparative Example 2 was prepared in the same manner as the method for preparing the surface layer forming paint according to Example 1.
- this surface layer forming coating material was coated on the surface of the elastic layer of the silicone rubber elastic layer C-1 and dried to form a surface layer, whereby a developing roller of Comparative Example 2 was prepared.
- the surface layer forming paint according to Comparative Example 3 was prepared in the same manner as the method for preparing the surface layer forming paint according to Example 1.
- this surface layer forming coating material was applied to the surface of the elastic rubber layer of the elastic roller C-1 and dried to form a surface layer, whereby a developing roller of Comparative Example 3 was prepared.
Abstract
Description
軸芯体2は、現像ローラ1の電極および支持部材として機能するもので、アルミニウム、銅合金、ステンレス鋼の如き金属または合金;クロム、又はニッケルで鍍金処理を施した鉄;導電性を有する合成樹脂の如き導電性の材質で構成される。
弾性層3は、現像ローラと感光体との当接部において、所定の幅のニップを形成するために必要な弾性を現像ローラに与えるものである。弾性層3は、当該弾性層に高い変形からの回復性および高い柔軟性を与える、付加硬化型ジメチルシリコーンゴムの硬化物を含む。
表面層4に含有されているウレタン樹脂は、隣接するウレタン結合の間に、下記構造式(1)で示される構造と、下記構造式(2)で示される構造および下記構造式(3)で示される構造からなる群から選ばれる何れか一方または両方の構造とを有している。すなわち、本発明に係るウレタン樹脂は、下記構造式(1)で示される構造と、下記構造式(2)で示される構造および下記構造式(3)で示される構造からなる群から選ばれる何れか一方または両方の構造が、2つのウレタン結合によって挟まれている構造を分子内に有するものである。
・ポリオール成分とポリイソシアネート成分を混合、反応させるワンショット法、
・一部のポリオールとイソシアネートを反応させて得られるイソシアネート基末端プレポリマーと、低分子ジオール、低分子トリオールの如き鎖延長剤とを反応させる方法
(a)構造式(1)の構造、および構造式(2)及び(3)から選ばれる少なくとも一つの構造からなる数平均分子量2000以上3000以下のポリエーテルジオールと芳香族ジイソシアネートを反応させた数平均分子量10000以上15000以下の水酸基末端プレポリマー
(b)構造式(1)の構造、および構造式(2)及び(3)から選ばれる少なくとも一つの構造からなる数平均分子量2000以上3000以下のポリエーテルジオールと芳香族イソシアネートを反応させたイソシアネート基末端プレポリマー
軸芯体2として、SUS304製の直径6mmの芯金にプライマー(商品名、DY35-051;東レダウコーニング社製)を塗布、焼付けしたものを用意した。
(弾性ローラC-1)
上記で用意した軸芯体2を金型に配置し、下記表1に記載した材料を混合した付加型シリコーンゴム組成物を金型内に形成されたキャビティに注入した。
カーボンブラックを、トーカブラック#4400(商品名、;東海カーボン社製)10質量部に変更した以外は弾性ローラC-1と同様にして、弾性ローラC-2を作成した。
カーボンブラックの量を5質量部に変更した以外は弾性ローラC-1と同様にして弾性ローラC-3を作成した。
カーボンブラックの量を10質量部に変更し、また、耐熱性付与剤およびその添加量を、疎水処理シリカ粉体5質量部に変更した以外は、弾性ローラC-1と同様にして弾性ローラC-4を作成した。
カーボンブラックの量を12質量部に変更した以外は弾性ローラC-2と同様にして弾性ローラC-5を作成した。
カーボンブラックおよびシリカ粉体の種類及び量を下記表2に示したように変更した以外は弾性ローラC-1と同様にして弾性ローラC-6を作成した。
弾性層を構成する材料を下記表3に記載したものに変更した。それ以外は弾性ローラC-1と同様にして弾性ローラC-7を作成した。
以下に本発明のポリウレタン表面層を得るための合成例を示す。
本実施例中における数平均分子量(Mn)及び重量平均分子量(Mw)の測定に用いた装置、並びに条件は以下の通りである。
測定機器:HLC-8120GPC(東ソ-社製)
カラム:TSKgel SuperHZMM(東ソ-社製)×2本
溶媒:THF(20mmol/Lトリエチルアミン添加)
温度:40℃
THFの流速:0.6ml/min
なお測定サンプルは0.1質量%のTHF溶液とした。更に検出器としてRI(屈折率)検出器を用いて測定を行った。
反応容器中で、乾燥テトラヒドロフラン 144.2g(2モル)、乾燥3-メチルテトラヒドロフラン 172.2g(2モル)(モル混合比50/50)の混合物を、温度10℃に保持した。70%過塩素酸13.1g、及び無水酢酸120gを加え、3時間反応を行った。次に反応混合物を20%水酸化ナトリウム水溶液600g中に注ぎ、精製を行った。さらに減圧下残留する水及び溶媒成分を除去し、液状のポリエーテルジオールA-1 224gを得た。数平均分子量は1000であった。
窒素雰囲気下、反応容器中で、MDI(商品名:コスモネートMDI、三井化学社製)28.4質量部に対し、反応容器内の温度を65℃に保持しつつ、200.0gのポリエーテルジオールA-1を徐々に滴下した。滴下終了後、温度75℃にて3時間反応させた。得られた反応物を室温(25℃)まで冷却して、水酸基末端ウレタンプレポリマーA-7を226g得た。数平均分子量は15000であった。
反応に用いたポリエーテルジオールおよび反応時間を下記表5に記載したように変更した以外は同様の条件にして、水酸基末端ウレタンプレポリマーA-8、A-9を得た。各々のプレポリマーA-8及びA-9の数平均分子量を表5に併せて示す。
窒素雰囲気下、反応容器中でトリレンジイソシアネート(TDI)(商品名:コスモネート80;三井化学社製)69.6質量部に対し、ポリプロピレングリコール系ポリオール(商品名:エクセノール1030;三洋化成工業社製)200.0gを反応容器内の温度を65℃に保持しつつ、徐々に滴下した。滴下終了後、温度65℃で2時間反応させた。得られた反応混合物を室温まで冷却し、イソシアネート基含有量4.8%のイソシアネート基末端ウレタンプレポリマーB-1を244g得た。
窒素雰囲気下、反応容器中でポリメリックMDI(商品名:ミリオネートMT 日本ポリウレタン工業社製)76.7質量部に対し、ポリプロピレングリコール系ポリオール
(商品名:エクセノール1030 三洋化成工業社製)200.0gを反応容器内の温度を65℃に保持しつつ、徐々に滴下した。滴下終了後、温度65℃で2時間反応させた。得られた反応混合物を室温まで冷却し、イソシアネート基含有量4.7%のイソシアネート基末端ウレタンプレポリマーB-2を229g得た。
ポリエーテルジオールを前記表4のポリエーテルジオールA-6およびA-3に変更した以外はイソシアネート基末端プレポリマーB-2と同様にして、イソシアネート基末端ウレタンプレポリマーB-3およびB-4を得た。
窒素雰囲気下、反応容器中でコロネート2030(商品名、日本ポリウレタン工業社製)46.4質量部に対し、前記表4のポリエーテルジオールA-6を200.0g反応容器内の温度を65℃に保持しつつ、徐々に滴下した。滴下終了後、温度65℃で2時間反応させた。得られた反応混合物を室温まで冷却し、イソシアネート基含有量3.4%のイソシアネート基末端ウレタンプレポリマーB-5を229g得た。イソシアネート基末端プレポリマーB-1~B-5の合成に用いたポリエーテルジオール種と、イソシアネート種および各イソシアネートのNCO%を表6に示す。
以下に、本願発明の現像ローラの製造法について説明する。
高温苛酷環境下における表面層剥がれの評価は、以下の方法で行った。実施例1に係る現像ローラを、気温40℃、相対湿度95%RHの環境下、60日間放置した。その後3時間室温下に放置し、現像ローラの両端部に10mm×50mmの切り込みを入れた。現像ローラを水平に固定し、切り込みの角から表面層を垂直方向に、10mm/minの速度で引っ張り、強制的に剥離した際の荷重をロードセルで測定した。測定は現像ローラの両端部で各々計3回行い、n=6の平均値を剥離強度とした。
次に剥離面の観察を行った。弾性層または表面層の内部で破壊した部分(凝集破壊)は除き、以下の基準で表面層剥がれの評価とした。
A:表面層、弾性層界面での剥離が全く認められない
B:剥離面中、20%以下の範囲で表面層、弾性層界面での剥離が認められるが使用上問題ないレベルである
C:剥離面の大部分または前面で表面層、弾性層界面での剥離が認められる
現像ローラの表面硬度を、マイクロゴム硬度計(商品名:MD-1capa、高分子計器社製)にて、直径0.16mm押針を用い、気温25℃、相対湿度50%RH環境下、導電性樹脂層形成後の現像ローラの中央部、上端部、下端部3点を測定した平均値を用いた。
フィルミングの評価は、図3のような構成を有するレーザプリンタ(商品名:LBP5300;キヤノン社製)に本実施例の現像ローラを装填し、評価を行った。即ち、気温15℃、相対湿度10%RHの環境(以下L/L)下、ブラックトナーを用いて、A4サイズの紙上に、サイズが4ポイントのアルファベット「E」の文字を、印字率1%となるような電子写真画像を連続印刷した。1000枚印字する度に、現像ローラの表面を目視で観察し、現像ローラの表面にブラックトナーが固着していることが確認できた時点における画像の印字枚数をフィルミングが発生した枚数とした。
高温高湿環境下におけるトナー固着濃度の評価は、以下の方法で行った。図3のような構成を有するレーザプリンタ(商品名:LBP5300;キヤノン社製)用のイエロートナーカートリッジに実施例1に係る現像ローラを装着した。このイエロートナーカートリッジを上記レーザプリンタに装填した。そして、このレーザプリンタを用いて白ベタ画像の出力動作を行って、現像ローラの表面がイエロートナーでコートされた状態とした。このような状態にある現像ローラをイエロートナーカートリッジから取り出した。この現像ローラを、ポリテトラフルオロエチレン製の平板上に載せて、300gf荷重(軸芯体両端に各150gf荷重)で平板に対して現像ローラを圧接し、気温40℃、相対湿度95%RHの環境下で、60日間放置した。次いで、現像ローラを、平板に対する圧接状態から解放し、温度25℃、相対湿度45%の環境に3時間静置し、その後、現像ローラの表面をエアブローした。ついで、現像ローラ上に固着したトナーを、粘着テープを用いて剥離した。このイエロートナーが付着した粘着テープを普通紙上におき、反射濃度計(商品名:TC-6DS/A、東京電色社製)を用いて反射濃度を測定した。また、対照として、トナーの付着していない粘着テープを同様に普通紙上におき、同様にして反射濃度を測定した。そして、トナーの付着していない粘着テープの反射濃度を基準として、反射率の低下量(%)を算出した。この測定は、現像ローラの中央部、および両端部の計3点で行い、その算術平均値を、評価対象の現像ローラのトナーの固着濃度とした。
弾性層3の吸水率の測定は、試験片として弾性層を2mm×2mm×25mmに切り出した後、日本工業規格(JIS) K7209 A法に準じて行い、n=3の平均値を弾性層の吸水率とした。
表面層4の原材料として、下記表8の材料を用いた以外は実施例1と同様に表面層形成用塗料を作成した。そして、各塗料を、表8に示した弾性ローラに対して、実施例1と同様にして塗布、乾燥および加熱を行って実施例2~19に係る現像ローラを作成した。
表面層4の材料として、下記表9に記載の材料を反応容器に入れ、撹拌混合した。
表面層4の材料として、下記表10に記載の材料を反応容器に入れて、撹拌混合した。
表面層4の材料として、下記表11に記載の材料を反応容器に入れて、撹拌混合した。
Claims (4)
- 前記弾性層の日本工業規格(JIS)K7209 A法に基づく吸水率が0.02%以上、0.10%以下である請求項1に記載の現像ローラ。
- 請求項1または2に記載の現像ローラと、該現像ローラと当接して配置されている電子写真感光体とを具備していることを特徴とする電子写真装置。
- 請求項1または2に記載の現像ローラと、該現像ローラと当接して配置されている電子写真感光体とを具備し、電子写真装置の本体に着脱可能に構成されていることを特徴とするプロセスカートリッジ。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020137019035A KR101471318B1 (ko) | 2010-12-28 | 2011-12-16 | 현상 롤러, 프로세스 카트리지 및 전자 사진 장치 |
CN201180063023.1A CN103282838B (zh) | 2010-12-28 | 2011-12-16 | 显影辊、处理盒和电子照相设备 |
RU2013135011/05A RU2540565C1 (ru) | 2010-12-28 | 2011-12-16 | Ролик проявления, технологический картридж и электрофотографическое устройство |
BR112013014842-0A BR112013014842A2 (pt) | 2010-12-28 | 2011-12-16 | rolo desenvolvedor, cartucho desenvolvedor e mecanismo eletrofotográfico |
EP11852903.1A EP2660657B1 (en) | 2010-12-28 | 2011-12-16 | Developing roller, process cartridge, and electrophotographic apparatus |
US13/438,580 US8600273B2 (en) | 2010-12-28 | 2012-04-03 | Developing roller, process cartridge, and electrophotographic apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-292765 | 2010-12-28 | ||
JP2010292765 | 2010-12-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/438,580 Continuation US8600273B2 (en) | 2010-12-28 | 2012-04-03 | Developing roller, process cartridge, and electrophotographic apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012090418A1 true WO2012090418A1 (ja) | 2012-07-05 |
Family
ID=46382560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/007035 WO2012090418A1 (ja) | 2010-12-28 | 2011-12-16 | 現像ローラ、プロセスカートリッジおよび電子写真装置 |
Country Status (8)
Country | Link |
---|---|
US (1) | US8600273B2 (ja) |
EP (1) | EP2660657B1 (ja) |
JP (1) | JP5079134B2 (ja) |
KR (1) | KR101471318B1 (ja) |
CN (1) | CN103282838B (ja) |
BR (1) | BR112013014842A2 (ja) |
RU (1) | RU2540565C1 (ja) |
WO (1) | WO2012090418A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014044411A (ja) * | 2012-07-31 | 2014-03-13 | Canon Inc | 電子写真用部材および電子写真装置 |
WO2019005037A1 (en) * | 2017-06-28 | 2019-01-03 | Hp Indigo B.V. | LIQUID ELECTROSTATIC INK DEVELOPER ASSEMBLY |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8913930B2 (en) | 2011-06-29 | 2014-12-16 | Canon Kabushiki Kaisha | Developing roller, electrophotographic process cartridge, and electrophotographic image forming apparatus |
EP2733549B1 (en) | 2011-07-15 | 2016-04-20 | Canon Kabushiki Kaisha | Developer carrier, process cartridge for electrophotography, and electrophotographic image-forming device |
JP5693441B2 (ja) * | 2011-12-26 | 2015-04-01 | キヤノン株式会社 | 電子写真用導電性部材、プロセスカートリッジおよび電子写真装置 |
JP5723354B2 (ja) * | 2011-12-28 | 2015-05-27 | キヤノン株式会社 | 現像部材、プロセスカートリッジおよび電子写真用画像形成装置 |
JP6023604B2 (ja) | 2012-02-17 | 2016-11-09 | キヤノン株式会社 | 現像部材、プロセスカートリッジおよび電子写真装置 |
JP5600719B2 (ja) * | 2012-06-27 | 2014-10-01 | キヤノン株式会社 | 現像部材、プロセスカートリッジおよび電子写真装置 |
JP6104068B2 (ja) | 2012-06-27 | 2017-03-29 | キヤノン株式会社 | 現像部材、プロセスカートリッジおよび電子写真装置 |
JP6179512B2 (ja) | 2012-07-04 | 2017-08-16 | 日本電気株式会社 | 充電システム制御装置、充電システム、プログラム、及び制御方法 |
JP2014040850A (ja) * | 2012-08-21 | 2014-03-06 | Osaka Gas Co Ltd | ローラー及び/又は金型の最表面用組成物 |
US20150064399A1 (en) * | 2013-08-27 | 2015-03-05 | Lexmark International, Inc. | Elastomeric Roll for an Electrophotographic Image Forming Device having a Coating that includes Compressible Hollow Microparticles |
JP6587418B2 (ja) * | 2014-05-15 | 2019-10-09 | キヤノン株式会社 | 電子写真用部材、プロセスカートリッジ及び電子写真装置 |
US9811009B2 (en) * | 2014-05-16 | 2017-11-07 | Canon Kabushiki Kaisha | Electrophotographic member, process cartridge and electrophotographic apparatus |
US9482986B2 (en) | 2015-02-27 | 2016-11-01 | Canon Kabushiki Kaisha | Member for electrophotography, process cartridge, and electrophotographic image forming apparatus |
US10197930B2 (en) | 2015-08-31 | 2019-02-05 | Canon Kabushiki Kaisha | Electrophotographic member, process cartridge, and electrophotographic apparatus |
US10082741B2 (en) | 2015-10-06 | 2018-09-25 | Canon Kabushiki Kaisha | Member for electrophotography, developing apparatus, and electrophotographic apparatus |
EP3176639B1 (en) * | 2015-12-04 | 2020-10-28 | Canon Kabushiki Kaisha | Member for electrophotography, process cartridge, and electrophotographic apparatus |
JP6806579B2 (ja) | 2016-02-05 | 2021-01-06 | キヤノン株式会社 | 電子写真用部材、その製造方法、プロセスカートリッジおよび電子写真装置 |
WO2017138449A1 (ja) * | 2016-02-08 | 2017-08-17 | 住友化学株式会社 | 積層光学フィルムの製造方法 |
JP6815889B2 (ja) | 2016-02-26 | 2021-01-20 | キヤノン株式会社 | 現像ローラ、プロセスカートリッジおよび電子写真画像形成装置 |
JP6878084B2 (ja) | 2016-04-12 | 2021-05-26 | キヤノン株式会社 | 現像部材、電子写真プロセスカートリッジ及び電子写真画像形成装置 |
US9952531B2 (en) | 2016-04-28 | 2018-04-24 | Canon Kabushiki Kaisha | Developing member having alumina particles exposed within protrusions |
US10331054B2 (en) | 2016-05-11 | 2019-06-25 | Canon Kabushiki Kaisha | Electrophotographic member, process cartridge and electrophotographic image forming apparatus |
JP6862276B2 (ja) | 2016-07-08 | 2021-04-21 | キヤノン株式会社 | 電子写真用部材、プロセスカートリッジおよび電子写真装置 |
JP6891065B2 (ja) | 2016-07-29 | 2021-06-18 | キヤノン株式会社 | 現像装置、電子写真プロセスカートリッジ及び電子写真画像形成装置 |
JP2018022074A (ja) | 2016-08-04 | 2018-02-08 | キヤノン株式会社 | 電子写真用部材、プロセスカートリッジ及び電子写真装置 |
US10310447B2 (en) | 2017-07-12 | 2019-06-04 | Canon Kabushiki Kaisha | Electrophotographic member, process cartridge, and electrophotographic image forming apparatus |
JP7166854B2 (ja) | 2017-09-27 | 2022-11-08 | キヤノン株式会社 | 電子写真用部材、プロセスカートリッジ及び電子写真装置 |
JP7057154B2 (ja) | 2018-02-26 | 2022-04-19 | キヤノン株式会社 | 現像部材、電子写真プロセスカートリッジおよび電子写真画像形成装置 |
US10884352B2 (en) | 2018-03-30 | 2021-01-05 | Canon Kabushiki Kaisha | Electrophotographic member, process cartridge and electrophotographic apparatus |
WO2019203238A1 (ja) | 2018-04-18 | 2019-10-24 | キヤノン株式会社 | 導電性部材及びその製造方法、プロセスカートリッジ並びに電子写真画像形成装置 |
CN111989622B (zh) | 2018-04-18 | 2022-11-11 | 佳能株式会社 | 显影构件、处理盒和电子照相设备 |
US10935903B2 (en) | 2018-04-19 | 2021-03-02 | Canon Kabushiki Kaisha | Developing roller, process cartridge and image forming apparatus |
US10969709B2 (en) * | 2018-04-20 | 2021-04-06 | Canon Kabushiki Kaisha | Member for electrophotography, process cartridge and electrophotographic apparatus |
US10539891B1 (en) | 2018-06-28 | 2020-01-21 | Canon Kabushiki Kaisha | Electrophotographic member, process cartridge and electrophotographic image forming apparatus |
US11169464B2 (en) | 2018-07-30 | 2021-11-09 | Canon Kabushiki Kaisha | Electrophotographic member, process cartridge, and electrophotographic image-forming apparatus |
JP7158943B2 (ja) | 2018-07-31 | 2022-10-24 | キヤノン株式会社 | 電子写真用部材、電子写真プロセスカートリッジおよび電子写真画像形成装置 |
US11022904B2 (en) | 2018-07-31 | 2021-06-01 | Canon Kabushiki Kaisha | Electrophotographic member, process cartridge and electrophotographic image forming apparatus |
JP7199881B2 (ja) | 2018-08-31 | 2023-01-06 | キヤノン株式会社 | 現像ローラ、電子写真プロセスカートリッジおよび電子写真用画像形成装置 |
US10732538B2 (en) | 2018-11-26 | 2020-08-04 | Canon Kabushiki Kaisha | Developing member, process cartridge, and electrophotographic image forming apparatus |
JP7414469B2 (ja) | 2018-11-26 | 2024-01-16 | キヤノン株式会社 | 現像部材、プロセスカートリッジおよび電子写真画像形成装置 |
US10942471B2 (en) | 2019-03-29 | 2021-03-09 | Canon Kabushiki Kaisha | Electrophotographic member having a surface layer with a cross-linked urethane resin-containing matrix, process cartridge, and apparatus |
CN114585975B (zh) | 2019-10-18 | 2023-12-22 | 佳能株式会社 | 电子照相导电性构件、处理盒和电子照相图像形成设备 |
WO2021075371A1 (ja) | 2019-10-18 | 2021-04-22 | キヤノン株式会社 | 導電性部材、その製造方法、プロセスカートリッジ及び電子写真画像形成装置 |
EP4050042A4 (en) | 2019-10-23 | 2023-11-15 | Canon Kabushiki Kaisha | DEVELOPER APPARATUS, ELECTROPHOTOGRAPHIC PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE PRODUCING APPARATUS |
JP2021076654A (ja) * | 2019-11-06 | 2021-05-20 | 株式会社ブリヂストン | 現像ローラ |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS575047A (en) | 1980-06-13 | 1982-01-11 | Ricoh Co Ltd | Coating method by dipping |
JPH07199645A (ja) | 1993-12-28 | 1995-08-04 | Bridgestone Corp | 現像ロ−ラ及び現像装置 |
JP2005141192A (ja) | 2003-10-15 | 2005-06-02 | Canon Inc | 現像ローラ |
JP2006251342A (ja) | 2005-03-10 | 2006-09-21 | Tokai Rubber Ind Ltd | 現像ロール |
JP2007133113A (ja) * | 2005-11-10 | 2007-05-31 | Canon Inc | 画像形成方法 |
JP2007156435A (ja) * | 2005-11-10 | 2007-06-21 | Canon Inc | 現像ローラ及びその製造方法、現像装置及び画像形成装置 |
JP2008164915A (ja) * | 2006-12-28 | 2008-07-17 | Canon Inc | 画像形成方法 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3422857B2 (ja) * | 1994-04-04 | 2003-06-30 | 保土谷化学工業株式会社 | 広いゴム領域を有する熱可塑性ポリウレタン樹脂及びその製造法 |
EP1134619A3 (en) | 2000-03-16 | 2003-04-02 | Canon Kabushiki Kaisha | Light-receiving member, image-forming apparatus, and image-forming method |
US6636715B2 (en) | 2000-05-22 | 2003-10-21 | Canon Kabushiki Kaisha | Photosensitive member and image forming apparatus having the same |
US6600893B2 (en) | 2000-09-19 | 2003-07-29 | Canon Kabushiki Kaisha | Transfer member, process for producing transfer member, and image forming apparatus having transfer member |
US7208211B2 (en) | 2000-09-19 | 2007-04-24 | Canon Kabushiki Kaisha | Electrophotographic belt member, process for producing electrophotographic belt member, and electrophotographic apparatus |
US6737133B2 (en) | 2000-09-19 | 2004-05-18 | Canon Kabushiki Kaisha | Electrophotographic seamless belt, and electrophotographic apparatus having the electrophotographic seamless belt |
US6725002B2 (en) | 2001-08-31 | 2004-04-20 | Canon Kabushiki Kaisha | Process cartridge, electrophotographic apparatus and image forming method |
US7201967B2 (en) | 2003-11-28 | 2007-04-10 | Canon Kabushiki Kaisha | Electrophotographic endless belt, process for producing electrophotographic endless belt, and electrophotographic apparatus |
WO2006033471A1 (ja) | 2004-09-24 | 2006-03-30 | Canon Kabushiki Kaisha | 電子写真ベルト、電子写真ベルトの製造方法および電子写真装置 |
EP1803757A4 (en) * | 2004-10-21 | 2009-05-06 | Asahi Glass Co Ltd | POLYURETHANE RESIN AND METHOD FOR MANUFACTURING POLYURETHANE RESIN SOLUTION |
JP4612830B2 (ja) * | 2004-11-11 | 2011-01-12 | キヤノン株式会社 | 現像ローラおよびこれを用いた電子写真装置用現像装置 |
JP4859186B2 (ja) * | 2005-11-10 | 2012-01-25 | オリンパスイメージング株式会社 | ズームレンズ及びそれを備えた撮像装置 |
US7727134B2 (en) * | 2005-11-10 | 2010-06-01 | Canon Kabushiki Tokyo | Developing roller, process for its production, developing assembly and image forming apparatus |
JP5207682B2 (ja) | 2006-09-29 | 2013-06-12 | キヤノン株式会社 | 現像部材及び電子写真画像形成装置 |
JP4144899B1 (ja) | 2007-01-22 | 2008-09-03 | キヤノン株式会社 | 再生弾性ローラの製造方法 |
KR101188052B1 (ko) | 2008-02-07 | 2012-10-04 | 캐논 가부시끼가이샤 | 전자 사진용 현상 부재, 그 제조 방법, 전자 사진용 프로세스 카트리지 및 전자 사진용 화상 형성 장치 |
JP4328831B1 (ja) * | 2008-02-19 | 2009-09-09 | キヤノン株式会社 | 現像装置、電子写真画像形成装置 |
CN102037414B (zh) * | 2008-05-30 | 2013-01-02 | 佳能株式会社 | 显影辊和生产该辊的方法、处理盒以及电子照相图像形成设备 |
JP2011002802A (ja) * | 2009-05-18 | 2011-01-06 | Ricoh Co Ltd | トナー及び現像剤、それを用いた画像形成方法及びプロセスカートリッジ |
KR101507666B1 (ko) | 2010-09-30 | 2015-03-31 | 캐논 가부시끼가이샤 | 재생 탄성 롤러의 제조 방법 |
-
2011
- 2011-12-15 JP JP2011274581A patent/JP5079134B2/ja active Active
- 2011-12-16 RU RU2013135011/05A patent/RU2540565C1/ru not_active IP Right Cessation
- 2011-12-16 CN CN201180063023.1A patent/CN103282838B/zh active Active
- 2011-12-16 EP EP11852903.1A patent/EP2660657B1/en active Active
- 2011-12-16 WO PCT/JP2011/007035 patent/WO2012090418A1/ja active Application Filing
- 2011-12-16 BR BR112013014842-0A patent/BR112013014842A2/pt not_active Application Discontinuation
- 2011-12-16 KR KR1020137019035A patent/KR101471318B1/ko active IP Right Grant
-
2012
- 2012-04-03 US US13/438,580 patent/US8600273B2/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS575047A (en) | 1980-06-13 | 1982-01-11 | Ricoh Co Ltd | Coating method by dipping |
JPH07199645A (ja) | 1993-12-28 | 1995-08-04 | Bridgestone Corp | 現像ロ−ラ及び現像装置 |
JP2005141192A (ja) | 2003-10-15 | 2005-06-02 | Canon Inc | 現像ローラ |
JP2006251342A (ja) | 2005-03-10 | 2006-09-21 | Tokai Rubber Ind Ltd | 現像ロール |
JP2007133113A (ja) * | 2005-11-10 | 2007-05-31 | Canon Inc | 画像形成方法 |
JP2007156435A (ja) * | 2005-11-10 | 2007-06-21 | Canon Inc | 現像ローラ及びその製造方法、現像装置及び画像形成装置 |
JP2008164915A (ja) * | 2006-12-28 | 2008-07-17 | Canon Inc | 画像形成方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2660657A4 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014044411A (ja) * | 2012-07-31 | 2014-03-13 | Canon Inc | 電子写真用部材および電子写真装置 |
KR20150038151A (ko) * | 2012-07-31 | 2015-04-08 | 캐논 가부시끼가이샤 | 전자 사진용 부재 및 전자 사진 장치 |
CN104508569A (zh) * | 2012-07-31 | 2015-04-08 | 佳能株式会社 | 电子照相用构件和电子照相设备 |
EP2881797A4 (en) * | 2012-07-31 | 2016-06-22 | Canon Kk | ELECTROPHOTOGRAPHIC ELEMENT AND ELECTROPHOTOGRAPHIC DEVICE |
KR101686358B1 (ko) * | 2012-07-31 | 2016-12-13 | 캐논 가부시끼가이샤 | 전자 사진용 부재 및 전자 사진 장치 |
CN104508569B (zh) * | 2012-07-31 | 2018-12-25 | 佳能株式会社 | 电子照相用构件和电子照相设备 |
WO2019005037A1 (en) * | 2017-06-28 | 2019-01-03 | Hp Indigo B.V. | LIQUID ELECTROSTATIC INK DEVELOPER ASSEMBLY |
CN110651230A (zh) * | 2017-06-28 | 2020-01-03 | 惠普印迪戈股份公司 | 液体静电墨水显影器组装件 |
US11181849B2 (en) | 2017-06-28 | 2021-11-23 | Hp Indigo B.V. | Liquid electrostatic ink developer assembly |
Also Published As
Publication number | Publication date |
---|---|
EP2660657A1 (en) | 2013-11-06 |
US8600273B2 (en) | 2013-12-03 |
BR112013014842A2 (pt) | 2020-11-03 |
EP2660657B1 (en) | 2017-02-22 |
JP5079134B2 (ja) | 2012-11-21 |
EP2660657A4 (en) | 2016-07-06 |
CN103282838B (zh) | 2016-01-20 |
JP2012150453A (ja) | 2012-08-09 |
KR101471318B1 (ko) | 2014-12-09 |
CN103282838A (zh) | 2013-09-04 |
RU2013135011A (ru) | 2015-02-10 |
RU2540565C1 (ru) | 2015-02-10 |
KR20130106426A (ko) | 2013-09-27 |
US20120195631A1 (en) | 2012-08-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5079134B2 (ja) | 現像ローラ、プロセスカートリッジおよび電子写真装置 | |
JP6104068B2 (ja) | 現像部材、プロセスカートリッジおよび電子写真装置 | |
JP5631447B2 (ja) | 電子写真用部材、プロセスカートリッジおよび電子写真装置 | |
JP5600719B2 (ja) | 現像部材、プロセスカートリッジおよび電子写真装置 | |
JP5893776B2 (ja) | 現像剤担持体、電子写真プロセスカートリッジ及び電子写真画像形成装置 | |
JP5723354B2 (ja) | 現像部材、プロセスカートリッジおよび電子写真用画像形成装置 | |
JP5196956B2 (ja) | 現像ローラ、現像ローラの製造方法、プロセスカートリッジおよび電子写真装置 | |
JP5022686B2 (ja) | 現像ローラの製造方法 | |
JP2017187721A (ja) | 現像部材、電子写真プロセスカートリッジおよび電子写真画像形成装置 | |
JP4865318B2 (ja) | 現像ローラ、その製造方法、プロセスカートリッジ及び画像形成装置 | |
JP5734084B2 (ja) | 現像ローラ、電子写真プロセスカートリッジ、及び電子写真画像形成装置 | |
JP2018041045A (ja) | 現像装置、電子写真プロセスカートリッジおよび電子写真画像形成装置 | |
JP2008107819A (ja) | 現像ローラー、電子写真装置用プロセスカートリッジ、電子写真画像形成装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11852903 Country of ref document: EP Kind code of ref document: A1 |
|
REEP | Request for entry into the european phase |
Ref document number: 2011852903 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011852903 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12013501384 Country of ref document: PH |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20137019035 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2013135011 Country of ref document: RU Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112013014842 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112013014842 Country of ref document: BR Kind code of ref document: A2 Effective date: 20130613 |