WO2011108548A1 - Rouleau conducteur et procédé de fabrication pour celui-ci - Google Patents

Rouleau conducteur et procédé de fabrication pour celui-ci Download PDF

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Publication number
WO2011108548A1
WO2011108548A1 PCT/JP2011/054650 JP2011054650W WO2011108548A1 WO 2011108548 A1 WO2011108548 A1 WO 2011108548A1 JP 2011054650 W JP2011054650 W JP 2011054650W WO 2011108548 A1 WO2011108548 A1 WO 2011108548A1
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WIPO (PCT)
Prior art keywords
elastic layer
roller
conductive roller
layer
shaft
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PCT/JP2011/054650
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English (en)
Japanese (ja)
Inventor
純一 高野
いづみ 吉村
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株式会社ブリヂストン
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Publication of WO2011108548A1 publication Critical patent/WO2011108548A1/fr

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0058—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a roller or a polygonal rotating cleaning member; Details thereof, e.g. surface structure
    • 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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
    • G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers
    • G03G15/0233—Structure, details of the charging member, e.g. chemical composition, surface properties
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1665—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
    • G03G15/167—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer
    • G03G15/1685—Structure, details of the transfer member, e.g. chemical composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2483/10—Block- or graft-copolymers containing polysiloxane sequences
    • C08J2483/12—Block- or graft-copolymers containing polysiloxane sequences containing polyether sequences

Definitions

  • the present invention relates to a conductive roller and a manufacturing method thereof (hereinafter also simply referred to as “roller” and “manufacturing method”), and more specifically, a conductive roller used in an image forming apparatus using an electrophotographic method and a manufacturing method thereof. Regarding the method.
  • a transfer roller In general, in an image forming apparatus using an electrophotographic system such as a copying machine, a printer, and a facsimile machine, a transfer roller, a developing roller, a toner supply roller, a charging roller, a cleaning roller, an intermediate transfer roller, and a belt are used in each image forming process.
  • roller member As such a roller member, a conventional structure in which an elastic layer made of rubber, a polymer elastomer, a polymer foam or the like provided with conductivity by blending a conductive agent on the outer periphery of a shaft is used as a basic structure. In order to obtain surface roughness, conductivity, hardness, and the like, those having a single-layer or multiple-layer coating on the outer periphery thereof are used.
  • Patent Document 1 discloses that a layered silica is coated at a predetermined ratio on a water-based electrophotographic apparatus coating material mainly containing an aqueous polyurethane resin and containing a fluororesin dispersion.
  • a technique for containing an acid salt is disclosed, and it is also described that a wetting agent such as a silicone compound can be contained in the coating agent for an electrophotographic apparatus member.
  • a solid (non-foamed) layer is usually provided on the outer periphery of the elastic layer made of a foam body for the purpose of adjusting resistance and ensuring elasticity. It is important that the pore diameter is small. This is because if the pore diameter on the surface of the elastic layer is large, the solid layer paint may permeate into the pores and cause undulation on the surface of the solid layer. Therefore, in a conductive roller having an elastic layer made of a foam body, in addition to low variation in the specific gravity of the elastic layer-forming coating material, it is important to increase the image accuracy that the bubbles in the foam are fine. Become. However, in the method by free foaming using a mixer or the like, it is difficult to adjust the specific gravity of the elastic layer forming coating material made of foam and the pore diameter of the elastic layer surface as desired. .
  • an object of the present invention is to provide a conductive roller that solves the above-described problems, has a small variation in specific gravity of the elastic layer-forming coating material, and has fine pores on the elastic layer surface, and a method for manufacturing the same. .
  • the present inventor has found that the above problem can be solved by blending a wetting agent in the composition of the foam body constituting the elastic layer, and has completed the present invention.
  • the conductive roller of the present invention is a conductive roller comprising a shaft and an elastic layer formed on the outer periphery of the shaft.
  • the elastic layer is made of a polyurethane foam containing a polyurethane resin and a wetting agent.
  • a silicone surfactant can be suitably used as the wetting agent.
  • the polyurethane foam preferably contains the wetting agent in an amount of 0.1 to 4 parts by mass with respect to 100 parts by mass of the polyurethane resin.
  • a surface layer is formed on the outer periphery of the elastic layer.
  • the conductive roller of the present invention can be suitably used as a charging roller.
  • the manufacturing method of the conductive roller of the present invention is a method of manufacturing the conductive roller of the present invention,
  • the compounding material containing the polyurethane resin and the wetting agent is foamed by mechanical stirring, and then the foamed compounding material is dipped on the shaft, and the elastic layer is formed on the outer periphery of the shaft. It is characterized by forming.
  • the inclusion of a wetting agent during the blending of the polyurethane foam constituting the elastic layer reduces the variation in specific gravity of the elastic layer-forming coating material, and the elastic layer surface has fine pores. It has become possible to realize a roller and its manufacturing method.
  • FIG. 3 is a photograph showing the state of pores in the cross section of the elastic layer of the conductive roller of Example 1.
  • FIG. 6 is a photographic diagram showing the state of pores in the cross section of the elastic layer of the conductive roller of Example 2.
  • FIG. 10 is a photographic diagram showing the state of pores in the cross section of the elastic layer of the conductive roller of Example 3.
  • FIG. 10 is a photographic diagram showing the state of pores in the cross section of the elastic layer of the conductive roller of Example 4.
  • 6 is a photographic view showing a state of pores in a cross section of an elastic layer of a conductive roller of Comparative Example 1.
  • FIG. 3 is a photograph showing the state of pores in the cross section of the elastic layer of the conductive roller of Example 1.
  • FIG. 6 is a photographic diagram showing the state of pores in the cross section of the elastic layer of the conductive roller of Example 2.
  • FIG. 1 is a longitudinal sectional view showing an example of the conductive roller of the present invention.
  • the conductive roller 10 of the present invention includes at least a shaft 1 and an elastic layer 2 sequentially formed on the outer periphery thereof.
  • a solid (non-foamed) surface layer 3 is further formed on the outer periphery of the elastic layer 2.
  • the present invention is characterized in that the elastic layer 2 is made of a polyurethane foam containing a polyurethane resin and a wetting agent.
  • a wetting agent to the polyurethane foam composing the elastic layer 2
  • the foaming specific gravity of the paint when freely foamed is controlled more precisely, and the variation in specific gravity is within 0.1 g / ml. It is possible to suppress the foam cell to become coarse, and the pores on the surface of the elastic layer can be reduced to an average pore diameter of about 130 ⁇ m or less, thereby improving the surface property of the roller. It became possible. Further, according to the present invention, a leveling effect can be obtained, that is, dripping of the surface during drying when the elastic layer is applied and formed by dipping can be suppressed.
  • a silicone-based surfactant such as polyether-modified silicone
  • the polyether-modified silicone has a structure in which a part of the alkyl group of poly (dialkylsiloxane) is replaced with a substituent having a polyoxyalkylene group.
  • examples of such polyether-modified silicones include dimethylpolysiloxane polyoxyalkylene copolymers.
  • the foamed cells that have become coarser tend to break As the wetting agent composed of such a silicone surfactant, for example, SN wet 125 manufactured by San Nopco Co., Ltd. can be suitably used.
  • the amount of the wetting agent is preferably 0.1 to 4 parts by mass, particularly 0.1 to 2 parts by mass with respect to 100 parts by mass of the polyurethane resin. If the blending amount of the wetting agent is too large, gelation of the paint tends to occur. On the other hand, if the blending amount is too small, the desired effect of the present invention may not be obtained sufficiently, which is not preferable.
  • the point that the wetting agent is contained in the polyurethane foam constituting the elastic layer 2 of the conductive roller is important, and other points can be appropriately configured according to a conventional method. It is not limited.
  • the polyurethane resin used for the polyurethane foam a conventionally known material can be appropriately selected and used, and is not particularly limited.
  • the foaming ratio of the polyurethane foam is not particularly limited, but is preferably 1.2 to 50 times, particularly preferably about 1.5 to 10 times, and the foam density is 0.1 to 0.7 g / About cm 3 is preferable.
  • a conductive agent can be added to the elastic layer 2, whereby conductivity can be imparted or adjusted to a predetermined resistance value.
  • the conductive agent is not particularly limited, and lauryltrimethylammonium, stearylmethylammonium, octadodecyltrimethylammonium, hexadecyltrimethylammonium, modified fatty acid / dimethylethylammonium perchlorate, chlorate, borofluoride , Cationic surfactants such as quaternary ammonium salts such as halogenated benzyl salts such as sulfates, etosulphate salts, benzyl bromide salts, benzyl chloride salts, aliphatic sulfonates, higher alcohol sulfates, Anionic surfactants such as higher alcohol ethylene oxide addition sulfate, higher alcohol phosphate, higher alcohol ethylene oxide addition phosphate, higher alcohol ethylene oxide, polyethylene glycol fatty
  • Electrolytes such as Group 1 metal salts or NH 4 + salts, conductive carbons such as ketjen black and acetylene black, rubber carbons such as SAF, ISAF, HAF, FEF, GPF, SRF, FT, and MT Oxidized carbon for color (ink), pyrolytic carbon, natural graphite, artificial graphite, antimony-doped tin oxide, titanium oxide, zinc oxide, nickel, copper, silver, germanium and other metals and metal oxides, Examples thereof include conductive polymers such as polyaniline, polypyrrole, and polyacetylene. These conductive agents may be used alone or in combination of two or more. The blending amount of these conductive agents is appropriately selected according to the type of the composition. Usually, the volume resistivity of the elastic layer 2 is 10 0 to 10 8 ⁇ ⁇ cm, preferably 10 2 to 10 6 ⁇ ⁇ cm. It is adjusted to become.
  • the elastic layer 2 may include a water resistance agent, a foaming agent, a foam stabilizer, a curing agent, a thickener, an antifoaming agent, a leveling agent, a dispersing agent, if necessary.
  • a known additive such as a thixotropic property-imparting agent, an anti-blocking agent, a crosslinking agent, or a film-forming auxiliary agent can be blended.
  • a water-resistant agent for example, ammonium zirconium carbonate can be suitably used.
  • the surface property of the roller can be improved by miniaturization.
  • the blending amount of the water-resistant agent is preferably 0.5 to 20 parts by mass, particularly 0.5 to 5 parts by mass with respect to 100 parts by mass of the polyurethane resin. If the amount of the water-resistant agent is too large, the viscosity tends to be too high and the pot life tends to decrease. On the other hand, if the amount of the water-resistant agent is too small, the desired effect may not be obtained sufficiently. However, neither is preferable.
  • the thickness of the elastic layer 2 is preferably 0.6 to 5.0 mm, and more preferably 1.0 to 3.0 mm. By setting the thickness of the elastic layer 2 in such a range, spark discharge can be prevented.
  • a metal or plastic hollow cylindrical body or solid cylindrical body can be used, and preferably a metal hollow cylindrical body or solid cylindrical body. More preferably, it is a metal hollow cylinder. Thereby, cost efficiency can be improved.
  • the surface layer 3 provided on the elastic layer 2 is preferably formed using a water-based paint.
  • a water-based paint used for the surface layer 3
  • a known rubber or resin can be used as a material for a roller or the like.
  • the resin include a urethane-modified acrylic resin, a polyurethane resin, an acrylic resin, an acrylic silicone resin, a polyamide resin, a fluororesin, and the like, and one or more of these can be used in combination.
  • a rubber-based water-based paint natural rubber (NR), chloroprene rubber (CR), nitrile rubber (NBR), latex such as styrene-butadiene rubber (SBR), etc.
  • a polyurethane resin-based water-based paint ether-based, Ester and other emulsions and dispersions
  • acrylic resin-based water-based paints, acrylic and acrylic styrene emulsions, and fluororesin-based water-based paints include polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer Polymer, tetrafluoroethylene-ethylene copolymer, polychlorotrifluoroethylene, chlorotrifluoroethylene-ethylene copolymer, tetrafluoroethylene-vinylidene fluoride copolymer, polyvinylidene fluoride, polyvinyl fluoride Etc.
  • NR natural rubber
  • CR chlor
  • a water-based acrylic resin can be suitably used as the water-based paint.
  • an aqueous acrylic resin those containing acrylonitrile and n-butyl acrylate as essential components and optionally containing other monomers are preferable.
  • examples of other monomers include ethyl acrylate, 2-ethylhexyl acrylate, acrylic acid, Examples include methacrylic acid.
  • acrylonitrile and n-butyl acrylate are essential components is that they contribute to the improvement of elasticity (setting property). From this viewpoint, the amount of n-butyl acrylate is increased as much as possible, and other components It is preferable to reduce the monomer ratio of other monomer components other than the essential components.
  • the monomer ratio of acrylonitrile, which is an essential component, and n-butyl acrylate is preferably in the range of 1 to 25:99 to 75, particularly 5 to 20:95 to 80 in terms of molar ratio.
  • the water-based acrylic resin contains a group having active hydrogen in the molecule.
  • the group having active hydrogen include a carboxyl group, a hydroxyl group, and an amino group, and a carboxyl group is preferable.
  • the ratio of the monomer containing the group having active hydrogen is preferably in the range of 3 to 6% of the total monomer amount.
  • a water-based acrylic resin having a surface acid value adjusted to 10 mg / g or more, for example, 10 to 20 mg / g is suitably obtained by setting the ratio of the monomer containing a group having active hydrogen within this range. Can be used.
  • the water-based paint forming the surface layer 3 is not particularly limited, but the conductivity (electric resistance) of the surface layer 3 can be imparted or adjusted by adding a conductive agent.
  • a conductive agent There is no restriction
  • the thing similar to being used for the elastic layer 2 can be used suitably by 1 type or in mixture of 2 or more types.
  • the blending amount of these conductive agents is appropriately selected according to the type of the composition.
  • the volume resistivity of the surface layer 2 is 1 ⁇ 10 4 to 1 ⁇ 10 12 ⁇ ⁇ cm, preferably 1 ⁇ 10 6 to It is adjusted to be 1 ⁇ 10 8 ⁇ ⁇ cm.
  • additives such as a cross-linking agent, a thickener, a thixotropy imparting agent, and a structural viscosity imparting agent can be added as necessary.
  • the thickness of the surface layer 3 is not particularly limited, but can usually be 1 to 30 ⁇ m, particularly 1 to 20 ⁇ m. When the thickness of the surface layer 3 is less than 1 ⁇ m, the durability of the roller may be inferior. On the other hand, when the thickness exceeds 30 ⁇ m, the charging property is adversely affected and the surface is wrinkled. May not be obtained.
  • the conductive roller 10 of the present invention includes at least an elastic layer 2 on the outer periphery of the shaft 1, and preferably further includes a surface layer 3. If necessary, between the elastic layer 2 and the surface layer 3, The resistance adjustment layer 5 can be provided as an intermediate layer, and the adhesive layer 4 can be further interposed between the elastic layer 2 and the resistance adjustment layer 5. Furthermore, prior to forming the elastic layer 2 on the outer periphery of the shaft 1, an adhesive layer 4 can be provided to improve the adhesion between the shaft 1 and the elastic layer 2.
  • FIG. 2 is a longitudinal sectional view showing another configuration example of the conductive roller of the present invention.
  • the illustrated conductive roller 20 includes a shaft 1 and an adhesive layer 4, an elastic layer 2, a resistance adjusting layer 5, and a surface layer 3 that are sequentially formed on the outer periphery thereof.
  • the resistance adjusting layer 5 can be formed of a resin composition obtained by adding a conductive agent to a resin.
  • the resin constituting the resin composition is not particularly limited, but specifically, for example, urethane resin, acrylic urethane resin, acrylic resin, ester resin, nylon resin, phenol resin, epoxy resin, fluororesin , Silicone resins, and the like, and one or a mixture of two or more of these can be used.
  • water-based paints such as urethane resins, acrylic urethane resins, and acrylic resins are preferably used.
  • the conductive agent added to the water-based paint the same conductive agent as that used for the elastic layer 2 can be used.
  • the resistance adjustment layer 5 is arbitrarily provided to adjust the electrical resistance value of the conductive roller.
  • the resistance value of the resistance adjustment layer 5 is the resistance value of the elastic layer 2 or the resistance required of the roller. Although it is set as appropriate depending on the value, it can usually be in the range of 1 ⁇ 10 3 to 1 ⁇ 10 8 ⁇ ⁇ cm, particularly 1 ⁇ 10 5 to 1 ⁇ 10 7 ⁇ ⁇ cm.
  • the blending amount of the conductive agent can be an appropriate amount that achieves this resistance value, but is usually 0.1 to 20 parts by mass with respect to 100 parts by mass of the base resin of the water-based paint. In particular, it is preferably 1 to 10 parts by mass.
  • various additives can be blended into the resistance adjusting layer 5 without departing from the object of the present invention.
  • oxazoline-based, epoxy-based, melamine-based, guanamine-based, isocyanate-based, phenol-based cross-linking agents can be blended in appropriate amounts according to the base resin used. You may mix
  • the thickness of the resistance adjusting layer 5 is appropriately selected according to the thickness of the elastic layer 2 and the form of the conductive roller, and is not particularly limited, but is usually 10 to 500 ⁇ m, particularly 50 to 300 ⁇ m. Is preferred. When the thickness of the resistance adjusting layer 5 is less than 50 ⁇ m, it may be difficult to adjust the resistance value sufficiently. On the other hand, when the thickness exceeds 300 ⁇ m, the thickness of the elastic layer becomes relatively thin, and the roller In some cases, the hardness (member hardness) becomes high, or the cost becomes higher than necessary.
  • the adhesive layer 4 can be provided as desired in order to firmly adhere between the shaft 1 and the elastic layer 2 or between the elastic layer 2 and the resistance adjusting layer 5.
  • the thickness can be about 1 to 100 ⁇ m.
  • the adhesive layer 4 can be formed using, for example, a resin material such as an acrylic resin, a urethane resin, an acrylic urethane resin, a polyester resin, a polyamide resin, and a conductive agent and other additives are added as necessary. You can also.
  • FIG. 3 is a longitudinal sectional view showing still another example of the conductive roller of the present invention.
  • a conductive roller When a conductive roller is used as a charging roller or the like, it is important to form a uniform contact surface in the length direction when pressed by the photosensitive drum. It has a crown shape having a diameter larger than that of the end portion in the central portion in the longitudinal direction.
  • the crown amount representing the degree of protrusion at the center in the length direction in the cross section in the longitudinal direction of the roller is preferably 50 to 300 ⁇ m, thereby further improving the normal image. Can be made. If the crown amount is less than 50 ⁇ m, the contact pressure in the central portion in the roller length direction becomes low. On the other hand, if the crown amount exceeds 300 ⁇ m, the central portion in the roller length direction is too strongly contacted. There is a risk of causing problems such as uneven charge amount.
  • the crown amount of the conductive roller can be measured using a high precision laser measuring machine LSM-430v manufactured by Mitutoyo Corporation.
  • the outer diameter is measured at the center of the roller and at a position of 90 mm from the center to the end, and the difference between the outer diameter of the center and the average value of the outer diameter at the positions of 90 mm in both end directions is calculated.
  • the deflection (film thickness accuracy) is 70 ⁇ m or less in the entire region in the roller length direction.
  • the deflection film thickness accuracy
  • the deflection is 70 ⁇ m or less in the entire region in the roller length direction.
  • the deflection of the conductive roller can be measured using a high-precision laser measuring machine LSM-430v manufactured by Mitutoyo Corporation. With this measuring machine, the outer diameter is measured for each of the five points in the roller length direction, and the average value of the difference between the maximum value and the minimum value of the outer diameter measured for each point is taken as the shake.
  • the conductive roller of the present invention can be particularly suitably used as a charging roller.
  • the conductive roller of the present invention can be manufactured as follows. That is, first, a wetting agent and other optional additives are added to the polyurethane resin constituting the elastic layer 2, and the resulting blended material is mechanically stirred using a stirrer such as a hand mixer. To make it foam. Then, the elastic layer 2 can be formed on the outer periphery of the shaft 1 by dipping the foamed compounding material onto the shaft 1. By forming the elastic layer 2 by directly applying a paint to the shaft 1, the manufacturing process can be simplified and the cost can be reduced.
  • the adhesive layer 4 is applied and formed using a paint in which the above-described constituent materials are dispersed or dissolved.
  • a coating method a known method such as a dipping method, a spray method, a roll coater method, a die coating method, a ring coating method or the like can be used as appropriate, and the adhesive layer 4 is formed by drying and solidifying after applying the paint.
  • a dipping method as a coating method.
  • the same method as described above may be used when the adhesive layer 4 is provided between the shaft 1 and the elastic layer 2.
  • the resistance adjustment layer 5 can also be applied and formed in the same manner as the adhesive layer 4 if desired.
  • the conductive layer of the present invention is formed by coating the surface layer 3 on the elastic layer 2 or the resistance adjusting layer 5 formed on the elastic layer 2 in the same manner as the adhesive layer 4. Can be obtained.
  • the pore diameter on the surface of the elastic layer 2 is miniaturized, the paint does not enter the pores when the surface layer 3 or the like is applied and formed on the elastic layer 2, and the finally obtained conductivity is obtained. The effect of not impairing the surface property of the roller is obtained.
  • a conductive roller having a configuration in which an elastic layer 2 and a surface layer 3 are sequentially formed on the outer periphery of the shaft 1 as shown in FIG. 1 was produced as follows according to the formulation shown in the table below.
  • Epocros emulsion of oxazoline group-containing styrene-acrylic copolymer
  • water-based paint aqueous emulsion of acrylonitrile-alkyl acrylate-methacrylic acid-glycidyl methacrylate copolymer
  • dispersed carbon 7.5 parts by weight of fine seal X-12 (hydrophilic silica)
  • SN deformer 777 antifoaming agent
  • 1 part by weight of SN wet 970 wetting agent
  • UH420 thickening agent
  • the water-based paint containing each component was filtered through a mesh to remove aggregates.
  • the shaft 1 was dipped on this water-based paint and thermally dried to form an adhesive layer 4 having a thickness of 100 ⁇ m on the outer periphery of the shaft 1.
  • the elastic layer compounding materials shown in the table below were put into a container and stirred for 30 minutes using a wing. Thereafter, the mixture was stirred for 6 minutes using a commercially available hand mixer and foamed to obtain a foamed urethane water dispersion.
  • CS-12 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate (CS-12, Chisso Corporation) with respect to 100 parts by mass of water-based paint (acrylic silicone resin, EX102SI, manufactured by Nippon Shokubai Co., Ltd.) )) 70 parts by mass, water-based silicone graft acrylic polymer (Cymac US-450, manufactured by Toagosei Co., Ltd.), polyether modified polydimethylsiloxane (BYK-333, manufactured by BYK Japan Japan) 27 parts by mass Parts, 2 parts by mass of fluorine-containing nonionic surfactant (Furgent 215M, manufactured by Neos Co., Ltd.), 10 parts by mass of silica (Fine Seal X-12, manufactured by Tokuyama Co., Ltd.), nylon particles (Gantz Pearl GPA-550) , Manufactured by Ganz Kasei Co., Ltd.) 15 parts by mass, an aqueous dispersion of
  • Urethane resin Adekabon titer HUX-950 (manufactured by ADEKA) * 2) Foaming agent: Nopco DC-100-A (manufactured by San Nopco) * 3) Wetting agent: SN wet 125 (manufactured by San Nopco) * 4) Conductive agent: BSYD14971 (manufactured by Gokoku Color Co., Ltd.) * 5) Foam stabilizer: Neogen S-20D (Daiichi Kogyo Seiyaku Co., Ltd.) * 6) Curing agent: Adekabon titer HUX-SW (manufactured by ADEKA Corporation) * 7) Water-resistant agent: AZ coat 5800MT (manufactured by San Nopco)

Abstract

L'invention porte sur un rouleau conducteur et sur un procédé de fabrication pour celui-ci. La surface d'une couche élastique dans ledit rouleau a de minuscules pores d'air, et des variations de la densité d'un revêtement utilisé pour former la couche élastique sont minimisées. Le rouleau conducteur selon l'invention comprend un arbre (1) et une couche élastique (2) formée sur la surface externe de l'arbre. La couche élastique (2) comprend une mousse polyuréthane contenant une résine polyuréthane et un agent humidifiant. Pour fabriquer le rouleau conducteur selon l'invention, un matériau mélangé contenant une résine polyuréthane et un agent humidifiant est expansé par agitation mécanique, et un arbre (1) est trempé dans le matériau mélangé expansé, de façon à former ainsi une couche élastique (2) sur la surface externe de l'arbre (1).
PCT/JP2011/054650 2010-03-01 2011-03-01 Rouleau conducteur et procédé de fabrication pour celui-ci WO2011108548A1 (fr)

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JP2010-044655 2010-03-01
JP2010044655A JP2011180387A (ja) 2010-03-01 2010-03-01 導電性ローラおよびその製造方法

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002363237A (ja) * 2001-06-07 2002-12-18 Bridgestone Corp 導電性ポリウレタンフォーム部材
JP2009025418A (ja) * 2007-07-17 2009-02-05 Bridgestone Corp 導電性ローラ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002363237A (ja) * 2001-06-07 2002-12-18 Bridgestone Corp 導電性ポリウレタンフォーム部材
JP2009025418A (ja) * 2007-07-17 2009-02-05 Bridgestone Corp 導電性ローラ

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