WO2019150763A1 - Rouleau électroconducteur et dispositif de formation d'image - Google Patents

Rouleau électroconducteur et dispositif de formation d'image Download PDF

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Publication number
WO2019150763A1
WO2019150763A1 PCT/JP2018/045106 JP2018045106W WO2019150763A1 WO 2019150763 A1 WO2019150763 A1 WO 2019150763A1 JP 2018045106 W JP2018045106 W JP 2018045106W WO 2019150763 A1 WO2019150763 A1 WO 2019150763A1
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Prior art keywords
base layer
mass
coating film
roller
parts
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PCT/JP2018/045106
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English (en)
Japanese (ja)
Inventor
章英 大迫
真哉 礒永
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株式会社ブリヂストン
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Publication of WO2019150763A1 publication Critical patent/WO2019150763A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • 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
    • 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

Definitions

  • the present invention relates to a conductive roller and an image forming apparatus.
  • an electrophotographic image forming apparatus such as a copying machine, a facsimile, or a laser beam printer (LBP)
  • a developing roller a charging roller, a toner supply roller, a transfer roller, a paper feeding roller, a cleaning roller, and a pressure for fixing.
  • a roller or the like a roll-shaped conductive elastic member, that is, a conductive roller is frequently used, and the conductive roller is usually mounted with a shaft member supported by both ends in the length direction, and the shaft member.
  • an elastic base layer disposed on the outside in the radial direction.
  • various rubbers and elastomers such as polyurethane are used for the base layer, and the elastic layer can be manufactured by injecting an elastomer raw material into a mold having a desired cavity shape and heat-curing it. .
  • the conductive roller further forms a coating layer on the surface of the base layer for the purpose of improving the hardness of the roller, controlling chargeability and adhesion to toner, preventing contamination of the photosensitive drum by the elastic layer, and the like.
  • a technique of providing a coating layer made of an ultraviolet curable resin on a base layer is known.
  • an ultraviolet curable resin is used as the coating layer, although the contamination property is improved, curing shrinkage tends to occur in the surface layer when cured by ultraviolet irradiation, distortion occurs between the base layer and the surface layer, and the interlayer adhesion There was a problem that the property and adhesiveness deteriorated.
  • the surface layer contains a urethane acrylate oligomer having a large molecular weight (specifically, 6000 or more) and acryloylmorpholine, thereby improving the quality of the coating layer and improving interlayer adhesion.
  • a urethane acrylate oligomer having a large molecular weight specifically, 6000 or more
  • acryloylmorpholine thereby improving the quality of the coating layer and improving interlayer adhesion.
  • the conductive roller of the present invention is a conductive roller comprising a shaft, a base layer formed on the outer peripheral side of the shaft, and a coating film formed on the outer peripheral side of the base layer.
  • the coating film comprises at least an ultraviolet curable resin and at least one selected from the group consisting of N-vinyl amide and N-vinyl imide in an amount of 1 to 20 parts by mass with respect to 100 parts by mass of the ultraviolet curable resin. It is characterized by including.
  • the coating film is a surface layer formed on the base layer or an intermediate layer formed between the base layer and the surface layer. This is because the adhesion between the surface layer or intermediate layer of the conductive roller and the base layer can be enhanced.
  • the N-vinylamide is preferably at least one selected from the group consisting of N-vinylacetamide, N-vinylpyrrolidone and N-vinyl- ⁇ -caprolactam. This is because better adhesion of the coating film can be obtained.
  • the N-vinylimide is preferably N-vinylphthalimide. This is because better adhesion of the coating film can be obtained.
  • the coating film preferably contains at least one selected from the group consisting of silica and carbon black, and the total content of the silica and the carbon black is the ultraviolet curing.
  • the amount is more preferably 3 to 15 parts by mass with respect to 100 parts by mass of the conductive resin. This is because the occurrence of image defects can be more reliably suppressed while having excellent coating film adhesion.
  • the image forming apparatus of the present invention includes the above-described conductive roller of the present invention. With the above configuration, the occurrence of image defects due to the state of the conductive roller can be greatly reduced.
  • the present invention it is possible to provide a conductive roller that can suppress image defects and is excellent in adhesion of a coating film formed on the outer peripheral side of the base layer.
  • FIG. 1 is a partial cross-sectional view schematically illustrating an example of an image forming apparatus.
  • FIG. 1 (a) schematically shows one embodiment of the conductive roller of the present invention
  • FIG. 1 (b) shows another embodiment of the conductive roller of the present invention. This is schematically shown.
  • FIG. 2 is a cross-sectional view schematically showing one embodiment of the conductive roller of the present invention.
  • the conductive roller 1 of the present embodiment includes at least a base layer 3 and a coating film (FIG. 1 (a)) on the outer peripheral side of the shaft 2.
  • the conductive roller of the present invention specifically, a charging roller that uniformly charges an image carrier such as a photoconductor, a developing roller that carries and conveys a developer and supplies the developer to the image carrier, Developer supply roller for supplying developer while charging the developer roller, fixing roller for fixing the developer image transferred to a recording medium such as recording paper, cleaning roller for removing the developer adhering to the image carrier, etc. Etc.
  • the conductive roller of the present invention is preferably used as a developing roller. This is because the developing roller is a member that is particularly required to be able to suppress a decrease in print density due to a deterioration in toner conveyance performance, and thus can effectively benefit from the solution of the problem of the present invention.
  • the base layer 3 constituting the conductive roller 1 of the present embodiment is a layer positioned at the lowermost part of the conductive roller 1 (adjacent to the shaft 2).
  • the material constituting the base layer is not particularly limited and may be appropriately selected depending on the intended purpose.
  • Examples thereof include polyurethane resin, rubber elastic body, polyamide resin, polyester resin, polyimide resin, silicone resin, acrylic resin, and polyfluoride.
  • These may be used individually by 1 type and may use 2 or more types together.
  • a polyurethane resin is preferable in that good flexibility can be realized.
  • polyurethane resin As a polyurethane resin, According to the objective, it can select suitably.
  • a polyester-type urethane resin, a polyether-type urethane resin, a polycarbonate-type urethane resin, etc. are mentioned. These may be used individually by 1 type and may use 2 or more types together.
  • polyether-based urethane resins are preferable in that the resistance value of the resin is low and hydrolysis hardly occurs.
  • it when it is a polyurethane resin having a (meth) acrylate group, it can be cured by ultraviolet irradiation.
  • a polyurethane in which a (meth) acrylate group is introduced at the end of the polyurethane is preferable from the viewpoint of excellent ultraviolet curing efficiency.
  • the said base layer is formed from the composition for base layers.
  • the composition for the base layer is not particularly limited as long as it is a composition capable of forming the base layer, and can be appropriately selected according to the purpose.
  • the base layer composition preferably includes components such as a polyol, an isocyanate, a urethane bond catalyst, a solvent, and a filler.
  • a foam stabilizer is further included.
  • the composition for the base layer may include an ionic conductive agent, a plasticizer, a softening agent, a tackifier, an anti-tacking agent, a separating agent, a release agent, an extender, a colorant, and a crosslinking agent as necessary.
  • An agent, a vulcanizing agent, a polymerization inhibitor, and the like may be included.
  • polyether polyol polyester polyol, polytetramethylene glycol, polybutadiene polyol, alkylene oxide modified polybutadiene polyol, polyisoprene polyol, and the like can be mentioned. These may be used individually by 1 type and may use 2 or more types together. Among these, polyether polyol is preferable in terms of reducing the flexibility and permanent compression strain of the resin.
  • tolylene diisocyanate (TDI), prepolymerized tolylene diisocyanate (prepolymerized TDI), diphenylmethane diisocyanate (MDI), crude diphenylmethane diisocyanate (crude MDI), isophorone diisocyanate (IPDI), hydrogenated diphenylmethane diisocyanate, hydrogenated triphenyl
  • TDI tolylene diisocyanate
  • prepolymerized tolylene diisocyanate prepolymerized tolylene diisocyanate
  • MDI diphenylmethane diisocyanate
  • crude diphenylmethane diisocyanate crude diphenylmethane diisocyanate (crude MDI)
  • isophorone diisocyanate IPDI
  • hydrogenated diphenylmethane diisocyanate hydrogenated triphenyl
  • HDI hexamethylene diisocyanate
  • prepolymerized tolylene diisocyanate (prepolymerized TDI) is preferable in that it has a high urethane reaction activity and can easily improve the elasticity of the base layer and thus the conductive roller.
  • dibutyltin dilaurate dioctyltin acetate, dioctyltin bis (ethylmalate), dibutyltin bis (oleylmalate), dibutyltin diacetate, dibutyltin thiocarboxylate, dibutyltin dimaleate, dioctyltin thiocarboxylate, tin octenoate , Monobutyltin oxide, and the like. These may be used individually by 1 type and may use 2 or more types together. Among these, dibutyltin dilaurate is preferable in terms of high catalytic activity.
  • a silicone type foam stabilizer an ionic surfactant, a nonionic surfactant, etc. are mentioned. These may be used individually by 1 type and may use 2 or more types together. Among these, a silicone type foam stabilizer is preferable in that the foam uniformity of the foam is good. Moreover, it is preferable that the said silicone type foam stabilizer has a functional group.
  • the functional group of the silicone foam stabilizer is not particularly limited and may be appropriately selected depending on the intended purpose.
  • OH (hydroxy acid) group hydroxy acid group, thiol group, amino group, imino group, nitro group, nitroso Group, carboxyl group, acryloyl group, alkyl group, alkenyl group, alkoxy group, and the like. These may be used individually by 1 type and may use 2 or more types together.
  • the OH (hydric acid) group has an urethane bond with an OH (hydric acid) group derived from the silicone foam stabilizer of the base layer. Since it forms, it is preferable at the point which can improve the adhesiveness between a base layer and an adhesive layer more.
  • the moisture-curing adhesive described below contains MDI having two or more isocyanate groups, MDI has high electron withdrawing properties and is easy to chemically react with the foam stabilizer OH, resulting in high reaction efficiency and adhesion. Can be particularly improved.
  • the solvent is not particularly limited and may be appropriately selected depending on the purpose.
  • alcohols such as methanol, ethanol, isopropyl alcohol; butyl acetate; dimethyl sulfone; dimethyl sulfoxide; tetrahydrofuran; dioxane; toluene; xylene; These may be used individually by 1 type and may use 2 or more types together.
  • butyl acetate is preferred because of its high volatilization rate.
  • the electroconductive roller of this invention when forming a base layer with the said composition for base layers, can form a base layer by apply
  • Examples of the light source used for ultraviolet irradiation include a mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a metal halide lamp, and a xenon lamp.
  • the conditions for ultraviolet irradiation are appropriately selected according to the components, composition, coating amount, and the like contained in the layer forming raw material, and the irradiation intensity and the integrated light amount may be adjusted as appropriate.
  • a base layer can be formed by carry
  • the electroconductive roller 1 of this embodiment is provided with the coating film formed in the outer peripheral side of the base layer mentioned above, as shown to Fig.1 (a) and (b).
  • the coating film in the present invention refers to a layer formed directly on the base layer 3.
  • FIG. 1A when the surface layer 4 is directly formed on the base layer 3 in the conductive roller 1, the surface layer 4 corresponds to the coating film, and as shown in FIG.
  • the intermediate layer 5 is formed between the base layer 3 and the surface layer 4, the intermediate layer 5 corresponds to the coating film.
  • the intervening layer corresponds to the coating film.
  • the coating film is selected from the group consisting of at least an ultraviolet curable resin and 1 to 20 parts by mass of N-vinylamide and N-vinylimide with respect to 100 parts by mass of the ultraviolet curable resin. And at least one kind.
  • the adhesion to the surface layer of the coating film containing an ultraviolet curable resin can be greatly improved.
  • the coating film is cured, damages the toner, and image defects such as streaks may occur.
  • the coating film may be a layer formed directly on the base layer 3, but the adhesiveness with the base layer 3 can be improved, and the image performance can be further improved.
  • 1 is a surface layer 4 formed on the base layer 3 as shown in FIG. 1A, or an intermediate layer formed between the base layer 3 and the surface layer 4 as shown in FIG. 5 is preferable.
  • the said ultraviolet curable resin it is resin used as the base material of the said coating film.
  • a well-known ultraviolet curable resin such as a polyurethane resin, an acrylic resin, a vinyl ester resin, an epoxy resin, can be used.
  • polyurethane resins are used because they can increase the adhesion and flexibility of the coating film, can be cured quickly and can shorten the working time, and can be cured at low temperatures. Is preferably used.
  • polyurethane resin As a polyurethane resin, According to the objective, it can select suitably.
  • a polyester-type urethane resin, a polyether-type urethane resin, a polycarbonate-type urethane resin, etc. are mentioned. These may be used individually by 1 type and may use 2 or more types together.
  • polyether-based urethane resins are preferable in that the resistance value of the resin is low and hydrolysis hardly occurs.
  • it when it is a polyurethane resin having a (meth) acrylate group, it can be cured by ultraviolet irradiation.
  • a polyurethane in which a (meth) acrylate group is introduced at the end of the polyurethane is preferable from the viewpoint of excellent ultraviolet curing efficiency.
  • the coating film is formed from a coating film composition.
  • the coating film composition includes, in addition to at least one selected from the group consisting of N-vinylamide and N-vinylimide, and an ultraviolet curable resin, a (meth) acrylate monomer, a silicone additive, a fluorine additive, a polyol, Isocyanate, a solvent, a photoinitiator, etc. can be included.
  • At least one selected from the group consisting of N-vinylamide and N-vinylimide contained in the coating film is not particularly limited except the content thereof, and known N-vinylamide and N-vinylimide are used. be able to. With respect to at least one content selected from the group consisting of N-vinylamide and N-vinylimide contained in the coating film, image defects can be suppressed and adhesion to the base layer can be improved. From 1 to 20 parts by mass with respect to 100 parts by mass of the ultraviolet curable resin. When the content is less than 1 part by mass with respect to 100 parts by mass of the ultraviolet curable resin, sufficient adhesion with the base layer 3 cannot be obtained, while the content is 100 masses of the ultraviolet curable resin.
  • the content of at least one selected from the group consisting of the N-vinylamide and the N-vinylimide is preferably 1 to 15 parts by mass, and preferably 2 to 8 parts by mass. Is more preferable.
  • at least one content selected from the group consisting of N-vinylamide and N-vinylimide contained in the coating film was blended in the coating composition, not in the cured coating film.
  • the type of the N-vinylamide is not particularly limited, and a known N-vinylamide can be used.
  • Examples include vinyl barrel amide.
  • the N-vinylamide is selected from the group consisting of N-vinylacetamide, N-vinylpyrrolidone and N-vinyl- ⁇ -caprolactam from the standpoint that better adhesion to the base layer can be obtained. At least one kind is preferred.
  • the type of the N-vinylimide is not particularly limited, and a known N-vinylimide can be used. Examples thereof include N-vinylphthalimide, N-vinylmaleimide, N-vinylsuccinimide, N-vinylcyclopentanecarboximide, N-vinylnaphthalimide and the like.
  • the N-vinyl imide is preferably N-vinyl phthalimide from the viewpoint of obtaining better adhesiveness with the base layer.
  • the polyol is not particularly limited as long as it can form the above-described ultraviolet curable resin, and can be appropriately selected according to the purpose.
  • examples of the polyol include polyether polyol, polyester polyol, polytetramethylene glycol, polybutadiene polyol, alkylene oxide-modified polybutadiene polyol, and polyisoprene polyol. These may be used individually by 1 type and may use 2 or more types together.
  • the (meth) acrylate monomer is not particularly limited and can be appropriately selected depending on the purpose.
  • acryloylmorpholine, N, N-diethylaminoethyl methacrylate, isobornyl acrylate, phenoxyethyl acrylate, and the like can be given from the viewpoint that better adhesion to the base layer can be obtained.
  • These may be used individually by 1 type and may use 2 or more types together.
  • the (meth) acrylate monomer for example, at least one selected from the group consisting of (meth) acrylate monomers containing silicon and fluorine can be used in order to control the friction coefficient and chemical resistance.
  • tolylene diisocyanate (TDI), prepolymerized tolylene diisocyanate (prepolymerized TDI), diphenylmethane diisocyanate (MDI), crude diphenylmethane diisocyanate (crude MDI), isophorone diisocyanate (IPDI), hydrogenated diphenylmethane diisocyanate, hydrogenated triphenyl
  • TDI tolylene diisocyanate
  • prepolymerized tolylene diisocyanate prepolymerized tolylene diisocyanate
  • MDI diphenylmethane diisocyanate
  • CAde MDI crude diphenylmethane diisocyanate
  • IPDI isophorone diisocyanate
  • hydrogenated diphenylmethane diisocyanate hydrogenated triphenyl
  • isophorone diisocyanate is advantageous in that the viscosity can be easily adjusted in the production process, the flexibility of the base layer can be
  • Examples of the photopolymerization initiator contained in the coating film composition include 4-dimethylaminobenzoic acid, 4-dimethylaminobenzoic acid ester, 2,2-dimethoxy-2-phenylacetophenone, acetophenone diethyl ketal, and alkoxyacetophenone.
  • Benzyl derivatives such as benzyl and benzylmethyl ketal
  • benzoin derivatives such as benzoin and benzoin isobutyl ether
  • the coating film composition preferably contains at least one selected from the group consisting of silica and carbon black in addition to the above-described components.
  • the coating film composition preferably contains at least one selected from the group consisting of silica and carbon black as a filler in the coating film.
  • the total content of the silica and the carbon black is 100% by mass of the ultraviolet curable resin from the viewpoint that a more excellent image defect suppressing effect can be obtained while maintaining the adhesion of the coating film at a high level.
  • the amount is preferably 3 to 15 parts by mass with respect to parts. By making the total content 3 parts by mass or more with respect to 100 parts by mass of the ultraviolet curable resin, it is possible to realize a more excellent image defect suppression effect, while the total content is determined to be the ultraviolet curable resin 100. By making the amount 15 parts by mass or less with respect to the part by mass, the adhesiveness of the coating film is not adversely affected.
  • the total content of the silica and the carbon black is preferably 3 to 10 parts by mass, more preferably 3 to 8 parts by mass with respect to 100 parts by mass of the ultraviolet curable resin. .
  • content of the said silica and the said carbon black it is content with respect to 100 mass parts of ultraviolet curable resin components of the silica and carbon black mix
  • the said composition for coating films can also contain another component as needed in addition to each component mentioned above.
  • another component there is no restriction
  • Other components include, for example, conductive agents, elastomers other than ultraviolet curable resins, catalysts, foam stabilizers, fillers, fine particles, peptizers, foaming agents, plasticizers, softeners, tackifiers, and anti-tacking agents. , Separating agents, mold release agents, extenders, colorants, vulcanizing agents, polymerization inhibitors, and the like. These may be used individually by 1 type and may use 2 or more types together.
  • the conductive agent has an effect of imparting conductivity to the coating film.
  • a conductive agent is preferably one that can transmit ultraviolet rays, preferably an ionic conductive agent or a transparent electronic conductive agent, and particularly preferably an ionic conductive agent. Since the ionic conductive agent dissolves in the urethane acrylate oligomer and has transparency, when the ionic conductive agent is used as the conductive agent, even if the layer forming raw material is applied thickly on the shaft, the ultraviolet ray is sufficiently applied. It reaches the inside of the film, and the layer forming raw material can be sufficiently cured.
  • ionic conductive agent tetraethylammonium, tetrabutylammonium, dodecyltrimethylammonium, hexadecyltrimethylammonium, benzyltrimethylammonium, modified fatty acid dimethylethylammonium and the like perchlorate, chlorate, hydrochloride, bromate Ammonium salts such as salts, iodates, borofluorides, sulfates, ethyl sulfates, carboxylates, sulfonates; alkaline metals such as lithium, sodium, potassium, calcium, magnesium, alkaline earth metals Examples include perchlorate, chlorate, hydrochloride, bromate, iodate, borofluoride, sulfate, trifluoromethyl sulfate, and sulfonate.
  • transparent electronic conductive agents include fine particles of metal oxides such as ITO, tin oxide, titanium oxide, and zinc oxide; fine particles of metals such as nickel, copper, silver, and germanium: conductive titanium oxide whiskers, conductive titanium Examples include conductive whiskers such as barium acid whiskers.
  • conductive carbon such as ketjen black and acetylene black, carbon black for rubber such as SAF, ISAF, HAF, FEF, GPF, SRF, FT and MT, color carbon subjected to oxidation treatment, etc. Black, pyrolytic carbon black, natural graphite, artificial graphite or the like may be used.
  • These electrically conductive agents may be used individually by 1 type, and may use 2 or more types together.
  • An elastomer other than the ultraviolet curable resin can be appropriately contained according to the purpose.
  • the elastomer include silicone, ethylene-propylene-diene rubber (EPDM), acrylonitrile-butadiene rubber (NBR), natural rubber (NR), styrene-butadiene rubber (SBR), butadiene rubber (BR), and isoprene rubber (IR). ), Polynorbornene rubber, butyl rubber (IIR), chloroprene rubber (CR), acrylic rubber, epichlorohydrin rubber (ECO), ethylene-vinyl acetate copolymer (EVA); and mixtures thereof. These may be used individually by 1 type and may use 2 or more types together.
  • the catalyst examples include organic tin compounds such as dibutyltin dilaurate, dibutyltin diacetate, dibutyltin thiocarboxylate, dibutyltin dimaleate, dioctyltin thiocarboxylate, tin octenoate, and monobutyltin oxide; inorganic such as stannous chloride Tin compounds; organic lead compounds such as lead octenoate; monoamines such as triethylamine and dimethylcyclohexylamine; diamines such as tetramethylethylenediamine, tetramethylpropanediamine and tetramethylhexanediamine; pentamethyldiethylenetriamine, pentamethyldipropylenetriamine; Triamines such as tetramethylguanidine; triethylenediamine, dimethylpiperazine, methylethylpiperazine, methylmorpholine, dimethylamine Cyclic amines such as noeth
  • organotin compounds are preferred. These catalysts may be used individually by 1 type, and may be used in combination of 2 or more type. The amount of the catalyst used is preferably in the range of 0.001 to 2.0 parts by mass with respect to 100 parts by mass of the polyol.
  • foam stabilizer there is no restriction
  • a silicone type foam stabilizer, an ionic surfactant, a nonionic surfactant, etc. are mentioned. These foam stabilizers may be used individually by 1 type, and may use 2 or more types together. Of the above-mentioned foam stabilizers, silicone foam stabilizers are preferable in that the foam uniformity of the foam is good.
  • the conductive roller of the present invention includes a shaft 2 as shown in FIGS.
  • the material constituting the shaft 2 is not particularly limited as long as it has good conductivity.
  • it can be a shaft made of metal, a shaft made of a highly rigid resin base material, or a combination thereof. Further, it may be a metal or hollow cylinder made of a highly rigid resin hollowed inside.
  • the conductive agent dispersed in the high-rigidity resin carbon black powder, graphite powder, carbon fiber, metal powder such as aluminum, copper and nickel, metal oxide powder such as tin oxide, titanium oxide and zinc oxide, conductive A powdery conductive agent such as conductive glass powder is preferred.
  • electrically conductive agents may be used individually by 1 type, and may be used in combination of 2 or more type.
  • the blending amount of the conductive agent is not particularly limited, but is preferably in the range of 5 to 40% by mass, and more preferably in the range of 5 to 20% by mass with respect to the entire highly rigid resin.
  • the material of the metal shaft or metal cylinder includes iron, stainless steel, aluminum, etc., and these may be plated with zinc or nickel.
  • the material of the high-rigidity resin base material 1B includes polyacetal, polyamide 6, polyamide 6 and 6, polyamide 12, polyamide 4 and 6, polyamide 6 and 10, polyamide 6 and 12, polyamide 11, polyamide MXD6, poly Butylene terephthalate, polyphenylene oxide, polyphenylene sulfide, polyethersulfone, polycarbonate, polyimide, polyamideimide, polyetherimide, polysulfone, polyetheretherketone, polyethylene terephthalate, polyarylate, liquid crystal polymer, polytetrafluoroethylene, polypropylene, ABS resin, Examples include polystyrene, polyethylene, melamine resin, phenol resin, and silicone resin.
  • polyacetal, polyamide 6/6, polyamide MXD6, polyamide 6/12, polybutylene terephthalate, polyphenylene ether, polyphenylene sulfide, and polycarbonate are preferable.
  • These highly rigid resins may be used alone or in combination of two or more.
  • the image forming apparatus of the present invention includes the above-described conductive roller of the present invention.
  • FIG. 2 schematically shows an embodiment of the image forming apparatus of the present invention.
  • the conductive roller 1 of the present invention is used as the developing roller 16. Used.
  • the photosensitive member 11 holding the electrostatic latent image, the charging roller 12 positioned near the photosensitive member 11 (upward in the drawing) to charge the photosensitive member 11, and the toner storage The toner supply roller 13 for supplying the toner 15 in the section 14, the developing roller 16 disposed between the toner supply roller 13 and the photosensitive member 11, and the vicinity of the developing roller 16 (upward in the drawing) are provided.
  • the image forming apparatus of this embodiment can further include a known component (not shown) that is normally used in the image forming apparatus.
  • the charging roller 12 is brought into contact with the photosensitive member 11, and a voltage is applied between the photosensitive member 11 and the charging roller 12 to charge the photosensitive member 11 to a constant potential. Thereafter, an electrostatic latent image is formed on the photoconductor 11 by an exposure machine (not shown). Next, the photoreceptor 11, the toner supply roller 13, and the developing roller 16 rotate in the direction of the arrow in the drawing, so that the toner 15 on the toner supply roller 13 is sent to the photoreceptor 11 through the developing roller 16. It is done.
  • the toner 15 on the developing roller 16 is adjusted to a uniform thin layer by the cleaning blade 17 and rotates while the developing roller 16 and the photoconductor 11 are in contact with each other, so that the toner 15 is transferred from the developing roller 16 to the photoconductor 11.
  • the latent image is visualized by adhering to the electrostatic latent image.
  • the toner 15 attached to the latent image is transferred to a recording medium such as paper by the transfer roller 18, and the toner 15 remaining on the photoconductor 11 after the transfer is removed by the cleaning roller 19.
  • the composition for base layer was prepared.
  • the prepolymerized TDI as the isocyanate was used in the blending so that the INDEX ratio (number of moles of isocyanate group / number of moles of hydroxyl group) was 1.1.
  • the prepared base layer composition was stirred at 2000 rpm for 5 minutes using a disper mixer.
  • the above-mentioned mixture for preparing the base layer was poured into a 200 mm ⁇ 200 mm ⁇ 2 mm mold whose inner surface was coated with fluorine.
  • the cured urethane base layer was removed from the mold by heating at 120 ° C. for 30 minutes using an oven.
  • the peak intensity of the irradiated ultraviolet light (365 nm) was 1584 mW / cm, and the integrated light amount was 1086 mJ / cm 2 .
  • the ultraviolet curable resin 1 it prepared as follows.
  • the polyol Sannics PP-2000 (molecular weight 2000) of both-end hydroxyl group polypropylene diol (manufactured by Sanyo Chemical Industries, Ltd.) is blended, and as the isocyanate, isophorone diisocyanate (manufactured by Evonik Japan Co., Ltd.) is used.
  • Plaxel 220N molecular weight 2000 (made by Daicel Corporation) of both terminal hydroxyl group polycapracton diol is blended, and as a isocyanate, isophorone diisocyanate (manufactured by Evonik Japan Co., Ltd.) is added to 100 parts by mass of the polyol. 22 parts by mass, 0.05 parts by mass of tin catalyst U-810 as a urethane reaction catalyst, and 2-hydroxyethyl acrylate: light ester HOA (N) (Kyoeisha Chemical Co., Ltd.) 12 parts by mass with respect to 100 parts by mass of the polyol to prepare an ester urethane acrylate oligomer.
  • the isocyanate index is 2.0. * 3: The ultraviolet curable resin 3 was prepared as follows. As a polyol, Duranol T5652 (molecular weight 2000) (both Asahi Kasei Chemicals Co., Ltd.) of a hydroxyl group polycarbonate diol at both ends is blended, and isophorone diisocyanate (Evonik Japan Co., Ltd.) is added as an isocyanate to 100 parts by mass of the polyol.
  • the ultraviolet curable resin 4 was prepared as follows.
  • GI-2000 molecular weight 2100 (both Nippon Soda Co., Ltd.) of hydroxyl-terminated hydroxylated polybutadiene is blended as the polyol, and isophorone diisocyanate (Evonik Japan Co., Ltd.) is used as the isocyanate.
  • the present invention it is possible to provide a conductive roller that can suppress image defects and is excellent in adhesion of a coating film formed on the outer peripheral side of the base layer.

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  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

Le but de la présente invention est de fournir un rouleau électroconducteur avec lequel il est possible de supprimer des défauts d'image et qui possède une adhésivité exceptionnelle dans un film de revêtement formé sur le côté périphérique externe d'une couche de base. Pour atteindre ce but, le rouleau électroconducteur (1) comprend un arbre (2), une couche de base (3) formée sur le côté périphérique externe de l'arbre, et un film de revêtement formé sur le côté périphérique externe de la couche de base (3), le rouleau électroconducteur (1) se caractérisant en ce que le film de revêtement comprend au moins une résine durcissable aux UV et de 1 à 20 parties en masse, par rapport à 100 parties en masse de la résine durcissable aux UV, d'au moins un élément choisi dans le groupe constitué d'amides de N-vinyle et d'imides de N-vinyle.
PCT/JP2018/045106 2018-01-30 2018-12-07 Rouleau électroconducteur et dispositif de formation d'image WO2019150763A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0996944A (ja) * 1995-09-29 1997-04-08 Kanegafuchi Chem Ind Co Ltd 導電性ローラー
JP2000136287A (ja) * 1998-08-20 2000-05-16 Kanegafuchi Chem Ind Co Ltd ロ―ラ用組成物およびそれからのロ―ラ
JP2010248480A (ja) * 2009-03-27 2010-11-04 Tokai Rubber Ind Ltd 導電性組成物およびそれを用いた導電性部材
JP2010266512A (ja) * 2009-05-12 2010-11-25 Ricoh Co Ltd 現像ローラ、並びにこれを用いた現像装置、プロセスカートリッジ及び画像形成装置
JP2015114392A (ja) * 2013-12-09 2015-06-22 キヤノン株式会社 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及び電子写真装置
JP2016186546A (ja) * 2015-03-27 2016-10-27 富士ゼロックス株式会社 導電性ロール、帯電装置、プロセスカートリッジ、画像形成装置、及び導電性ロールの製造方法
JP2017058642A (ja) * 2015-09-18 2017-03-23 富士ゼロックス株式会社 帯電部材、帯電装置、画像形成装置及びプロセスカートリッジ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0996944A (ja) * 1995-09-29 1997-04-08 Kanegafuchi Chem Ind Co Ltd 導電性ローラー
JP2000136287A (ja) * 1998-08-20 2000-05-16 Kanegafuchi Chem Ind Co Ltd ロ―ラ用組成物およびそれからのロ―ラ
JP2010248480A (ja) * 2009-03-27 2010-11-04 Tokai Rubber Ind Ltd 導電性組成物およびそれを用いた導電性部材
JP2010266512A (ja) * 2009-05-12 2010-11-25 Ricoh Co Ltd 現像ローラ、並びにこれを用いた現像装置、プロセスカートリッジ及び画像形成装置
JP2015114392A (ja) * 2013-12-09 2015-06-22 キヤノン株式会社 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及び電子写真装置
JP2016186546A (ja) * 2015-03-27 2016-10-27 富士ゼロックス株式会社 導電性ロール、帯電装置、プロセスカートリッジ、画像形成装置、及び導電性ロールの製造方法
JP2017058642A (ja) * 2015-09-18 2017-03-23 富士ゼロックス株式会社 帯電部材、帯電装置、画像形成装置及びプロセスカートリッジ

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