WO2012117659A1 - 導電性ローラ、現像装置及び画像形成装置 - Google Patents
導電性ローラ、現像装置及び画像形成装置 Download PDFInfo
- Publication number
- WO2012117659A1 WO2012117659A1 PCT/JP2012/000304 JP2012000304W WO2012117659A1 WO 2012117659 A1 WO2012117659 A1 WO 2012117659A1 JP 2012000304 W JP2012000304 W JP 2012000304W WO 2012117659 A1 WO2012117659 A1 WO 2012117659A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- conductive roller
- urethane
- developer
- roller
- Prior art date
Links
Images
Classifications
-
- 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
- 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
-
- 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
-
- 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
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
- G03G2215/0103—Plural electrographic recording members
- G03G2215/0119—Linear arrangement adjacent plural transfer points
- G03G2215/0138—Linear arrangement adjacent plural transfer points primary transfer to a recording medium carried by a transport belt
- G03G2215/0141—Linear arrangement adjacent plural transfer points primary transfer to a recording medium carried by a transport belt the linear arrangement being horizontal
Definitions
- the present invention relates to a conductive roller, a developing device, and an image forming apparatus, and more specifically, a conductive roller capable of preventing filming from occurring for a long time and charging a developer to a desired charge amount, and long time And an image forming apparatus capable of forming a high quality image over the
- An image forming apparatus using an electrophotographic method includes various rollers.
- various rollers for example, a conductive roller having conductivity or semiconductivity, an elastic roller having a relatively low hardness, and the like can be mentioned.
- the conductive roller includes a charging roller for uniformly charging an image carrier such as a photosensitive member, a developing roller for carrying and transporting a developer and supplying the developer to the image carrier, and a developer for the developing roller.
- Examples include a developer supply roller that supplies while charging, a fixing roller that fixes a developer image transferred to a recording medium such as recording paper, and a cleaning roller that removes developer and the like attached to an image carrier and the like.
- These various rollers usually include an elastic layer formed of various rubbers such as silicone rubber and urethane rubber, and a surface layer formed on the outer periphery thereof.
- the electrostatic latent image is formed by supplying the toner carried on the latent image carrier to the latent image carrier on which the electrostatic latent image is formed in contact or in proximity thereto.
- the developing roller to be visualized is characterized in that the outer periphery of the developing roller is coated with a surface layer containing a guanamine skeleton containing 20% by weight or more of at least one selected from guanamine or a derivative thereof, and a guanamine condensate. Development roller is described.
- the developing roll includes a shaft, a base rubber layer formed on the outer periphery thereof, and a surface layer formed on the outer periphery of the base rubber layer directly or through another layer.
- the surface layer contains the following components (A) to (D), and the weight proportions of the components (A) to (C) are set in the ranges shown in the following formulas ( ⁇ ) and ( ⁇ ) And a developing roller formed of a resin composition.
- Amino resin B
- Diisocyanate C
- Resin having a glass transition temperature (Tg) of 0 ° C. or less
- Tg glass transition temperature
- Conductive agent 0.5> (A) / [(A) + (C)] ⁇ 0.3 ... ( ⁇ ) 0.6> [(A) + (B)] / [(A) + (B) + (C)] ⁇ 0.3 ( ⁇ ) "Is described.
- the conductive member is made of a polymer material containing a conductive powder, and silica fine particles are further dispersed in the polymer material. Conductive members are described.
- a roller in contact with a developer contributes to high quality image formation when mounted on a developing device or an image forming apparatus.
- a developer for example, a developing roller, a developer supply roller, etc.
- the developer is required to have a characteristic capable of providing a high charge amount to the developer.
- particles such as silica fine particles contained in a large amount to secure the surface roughness of the roller surface may be easily aggregated to adversely affect the charging characteristics, while containing particles having a relatively large particle diameter It tends to drop off from the roller surface with the passage of time, and the charging characteristics may deteriorate and filming may occur with the passage of time.
- the conductive resin layer, the surface layer and the surface layer (these may be collectively referred to as a surface layer) contain a cured product of an amino resin. Since the surface layer is inherently hard when it is used, when it is used as a developing roller, filming tends to occur by giving stress more than necessary to the developer, and charging characteristics are deteriorated by filming that increases with time. However, it became clear by the research of the present inventors.
- An object of the present invention is to provide a conductive roller capable of preventing the occurrence of filming and charging the developer to a desired charge amount over a long period of time.
- Another object of the present invention is to provide a developing device and an image forming apparatus capable of forming high quality images over a long period of time.
- a conductive roller according to the present invention which is a first means for solving the above problems, comprises a urethane coat layer formed on the outer peripheral surface of an elastic layer and containing a urethane resin and a particulate amino resin. It is characterized by
- the amino resin comprises at least one selected from the group consisting of guanamine resin, urea resin, melamine resin and aniline resin,
- the amino resin comprises guanamine resin, and
- the guanamine resin is a benzoguanamine resin.
- the amino resin is contained in a proportion of 10 to 70 parts by mass with respect to 100 parts by mass of the urethane resin.
- a developing device which is a second means for solving the above problems, is characterized by comprising the conductive roller according to the present invention.
- an image forming apparatus which is a third means for solving the above-mentioned problems, is characterized by comprising the conductive roller according to the present invention.
- the conductive roller according to the present invention has the urethane coat layer containing the urethane resin and the particulate amino resin on the outer peripheral surface of the elastic layer, so the developer is a surface even if it is used for a long time as a developing roller, for example.
- the developer can be charged to a desired charge amount. Therefore, according to the present invention, it is possible to provide a conductive roller capable of preventing the occurrence of filming and charging the developer to a desired charge amount over a long period of time.
- both the developing device and the image forming apparatus according to the present invention are provided with the conductive roller according to the present invention, it is preferable that the developer does not easily adhere to the conductive roller even if used for a long period as a developing roller, for example.
- FIG. 1 is a perspective view showing a conductive roller of an embodiment of the conductive roller according to the present invention.
- FIG. 2 is an enlarged schematic view showing a cross section of the conductive roller of an embodiment of the conductive roller according to the present invention taken along a plane perpendicular to the axis.
- FIG. 3 is a schematic view showing an example of the image forming apparatus according to the present invention provided with the developing device according to the present invention.
- the conductive roller according to the present invention optionally includes, for example, a shaft and an elastic layer formed on the outer peripheral surface of the shaft, and a urethane coat layer formed on the outer peripheral surface of the elastic layer.
- the urethane coat layer in the conductive roller according to the present invention contains a urethane resin and a particulate amino resin.
- the amino resin is in the form of particles, in other words, particles. Therefore, in the present invention, the particulate amino resin can also be referred to as particles of amino resin. Examples of this amino resin include guanamine resin, urea resin, melamine resin and aniline resin, and contain at least one of these.
- the conductive roller according to the present invention when the conductive roller according to the present invention includes the urethane coating layer containing the particulate amino resin, the conductive roller has a very small increase in the hardness of the urethane coating layer due to the particles of the amine resin. Since the urethane coating layer formed of the urethane resin can be maintained without significantly increasing the low hardness, the stress given to the developer is small, and the occurrence of filming can be prevented for a long time. In addition, the particulate amino resin is less likely to come off from the urethane coating layer as compared with particles such as silica fine particles, and the occurrence of filming due to the detachment of the amino resin can be prevented for a long time.
- the occurrence of filming can be prevented as described above, it is possible to prevent the change in the charging characteristics due to filming and the change in the charging characteristics due to the falling off of the particulate amino resin.
- the charge characteristics of the developer can be maintained for a long time to charge the developer to a desired charge amount for a long time.
- the conductive roller according to the present invention is thus low in hardness, specifically, preferably having a JIS A hardness of less than 45, and having a JIS A hardness of 43 or less. Particularly preferred.
- the lower limit value of the JIS A hardness in the conductive roller according to the present invention is not particularly limited, but may be, for example, 20, and in some cases, may be 30 or 40.
- JIS A hardness can be measured in accordance with JIS K6253.
- the conductive roller according to the present invention can contribute to forming a high density image by transporting the developer by a desired transport amount, so that the ten-point average roughness Rz on the surface, that is, the surface of the urethane coating layer is It is preferably 2 to 15 ⁇ m, particularly preferably 5 to 13 ⁇ m.
- a ten-point average roughness Rz ( ⁇ m) is a surface roughness meter (trade name “590A”, manufactured by Tokyo Seimitsu Co., Ltd.) equipped with a measuring probe with a tip radius of 2 ⁇ m.
- the conductive roller is set, and the surface of the conductive roller according to the present invention is at least three points along the circumferential direction or the axial direction according to a measuring length of 2.4 mm, a cutoff wavelength of 0.8 mm, and a cutoff type Gaussian.
- the roughness is measured and taken as their arithmetic mean value.
- the ten-point average roughness Rz ( ⁇ m) can be adjusted by the content and the average particle diameter of the particulate amino resin, the thickness of the urethane coating layer, and the like.
- the conductive roller according to the present invention is conductive.
- the conductive roller according to the present invention has conductivity, in addition to physical transportability of the developer due to the ten-point average roughness Rz, etc., it exhibits the characteristic of electrostatically supporting and transporting the developer. Can contribute to the formation of high density images.
- Examples of the conductivity of the conductive roller include an electrical resistance (temperature 20 ° C., relative humidity 50%).
- the electrical resistance (temperature 20 ° C., relative humidity 50%) is preferably 1 ⁇ 10 4 to 1 ⁇ 10 9 ⁇ .
- the electric resistance of the conductive roller according to the present invention is, for example, an electric resistance meter (trade name: ULTRA HIGH RESISTANCE METER R8340A, manufactured by ADVANTEST CO., LTD.), And the conductive roller according to the present invention is horizontally placed to a thickness of 5 mm.
- a gold-plated plate having a width of 30 mm and a length capable of mounting the entire elastic layer of this conductive roller is used as an electrode, and a load of 500 g is applied to each end of the shaft in the conductive roller according to the present invention.
- total load 1000 g In a supported state (total load 1000 g), apply DC 100 V between the shaft and the electrode, read the value of the electrical resistance meter after 1 second, and use this value as the electrical resistance value. , Can be measured.
- the conductive roller according to the present invention can charge the developer to a desired charge amount.
- the charge amount for charging the developer is preferably about 10 to 60 ⁇ C / g or about -60 to -10 ⁇ C / g, preferably about 15 to 50 ⁇ C / g or about -50. Even more preferred is a charge of ⁇ 15 ⁇ C / g, and particularly preferred is a charge of about 35 to 50 ⁇ C / g or a charge of about ⁇ 50 to ⁇ 35 ⁇ C / g.
- the conductive roller according to the present invention can charge the developer with the charge amount in the above range, when the conductive roller according to the present invention is used as a developing roller, it is charged to a desired charge amount.
- the developer can be supplied to the image carrier, and a high quality image can be formed.
- the conductive roller according to the present invention can be used as an image forming apparatus (trade name “MICROLINE 1032 PS” manufactured by Oki Data Co., Ltd., resolution 1200 dpi ), And after performing five sheets of black solid printing, the sixth sheet of black solid printing was forcibly stopped, and this conductive roller was removed from the image forming apparatus and adhered to the surface of the conductive roller.
- the developer can be measured by a suction type small-sized charge amount measuring device having a suction port with a cross-sectional area of 0.25 cm 2 , for example, trade name “210HS q / M METER” (manufactured by Trek Japan Co., Ltd.).
- the conductive roller 1 according to one embodiment of the conductive roller according to the present invention, as shown in FIGS. 1 and 2, includes a shaft 2, an elastic layer 3 formed on the outer peripheral surface of the shaft 2, and elasticity. And a urethane coat layer 4 formed on the outer peripheral surface of the layer 3.
- an elastic layer 3 is formed on the outer peripheral surface of the shaft 2 via an adhesive layer (also referred to as a primer layer) (not shown in FIGS. 1 and 2).
- the urethane coat layer 4 is formed on the outer peripheral surface of the elastic layer 3 via an adhesive layer (also referred to as a primer layer) (not shown in FIGS. 1 and 2) as desired.
- the conductive roller 1 has the JIS A hardness, the ten-point average roughness Rz, the electrical resistance and the charge amount in the above range.
- the shaft 2 only needs to have good conductive properties, and is usually a shaft called a so-called “metal core” made of iron, aluminum, stainless steel, brass or the like. Be considered a body.
- the shaft 2 may be a shaft obtained by plating an electrically conductive core such as a thermoplastic resin or a thermosetting resin to make it conductive, and further, a thermoplastic resin or a thermosetting resin or the like may be used. It may be a shaft formed of a conductive resin containing carbon black or metal powder as a conductivity imparting agent.
- the shaft 2 is adjusted to an appropriate diameter and axial length in accordance with the attached image forming apparatus. For example, the diameter of the shaft 2 may be 4 to 10 mm.
- the elastic layer 3 has elasticity.
- the elastic layer 3 has elasticity, when it is mounted in a contact type image forming apparatus, a large uniform contact width with the image carrier can be secured for a long period of time, while non-contact type image formation
- the regulating blade When mounted on the device, the regulating blade can function fully.
- the elastic layer 3 is formed by curing a rubber composition described later on the outer peripheral surface of the shaft 2.
- the elastic layer 3 only needs to have a hardness such that the conductive roller 1 has a JIS A hardness in the above range, and preferably has a JIS A hardness of 20 to 45.
- the elastic layer 3 has a JIS A hardness of 20 to 45, for example, when the conductive roller 1 is mounted on an image forming apparatus, the conductive roller 1 and an abutted body such as an image carrier etc. A large nip width can be secured.
- the conductive roller 1 when the conductive roller 1 is mounted as a developer carrier, for example, a developing roller, a large nip width between the conductive roller 1 and the image carrier is secured, the developer is efficiently charged and transported, and the development efficiency is improved. It can be done.
- the JIS A hardness of the elastic layer 3 can be measured in the same manner as the conductive roller according to the present invention.
- the thickness of the elastic layer 3 is preferably 1 mm or more, and more preferably 5 mm or more.
- the upper limit of the thickness of the elastic layer 3 is not particularly limited as long as the outer diameter accuracy of the elastic layer 3 is not impaired, but generally, if the thickness of the elastic layer 3 is too thick, the manufacturing cost of the elastic layer 3 increases. Therefore, in consideration of practical production cost, the thickness of the elastic layer 3 is preferably 30 mm or less, and more preferably 20 mm or less. For example, the thickness of the elastic layer 3 may be 3 to 7 mm.
- the elastic layer 3 has conductivity.
- Examples of the conductivity include an electrical resistance (temperature 20 ° C., relative humidity 50%).
- the electric resistance (temperature 20 ° C., relative humidity 50%) is preferably 1 ⁇ 10 2 to 1 ⁇ 10 6 ⁇ .
- the electric resistance of the elastic layer 3 can be measured basically in the same manner as the electric resistance of the conductive roller 1 in a state where the urethane coating layer 4 is removed from the conductive roller 1.
- the elastic layer 3 is formed of a rubber composition or a flexible resin composition containing various rubbers and / or flexible resins so that the conductive roller 1 has a low hardness in the above range.
- gum or flexible resin contained in these compositions silicone rubber, urethane rubber, EPDM etc. are mentioned, for example. Among these, silicone rubber is preferable in terms of environmental stability, durability, and the like.
- the silicone rubber includes silicone modified rubber and the like in addition to the usual silicone rubber. As described later, when the urethane coat layer 4 is provided, bleeding of the silicone oligomer on the surface of the urethane coat layer 4 can be prevented even when the elastic layer 3 is a silicone elastic layer.
- the rubber composition or the flexible resin composition forming the elastic layer 3 contains a rubber and / or a flexible resin, and optionally contains a conductivity imparting agent, various additives, and the like. Accordingly, the elastic layer 3 also contains the conductivity imparting agent and various additives which are usually contained in the rubber composition or the flexible resin composition.
- the rubber composition or the flexible resin composition will be described later.
- the urethane coat layer 4 is formed on the outer peripheral surface of the elastic layer 3 as a layer having a single layer structure or a multilayer structure, and in this example, is formed to have a single layer structure There is.
- the urethane coat layer 4 is formed by curing a urethane resin composition containing the particulate amino resin 5 described later on the outer peripheral surface of the elastic layer 3.
- the urethane coating layer 4 is generally formed in a thin layer, and specifically, preferably has a layer thickness of 2 to 50 ⁇ m, and more preferably 10 to 30 ⁇ m.
- the elastic layer 3 when the elastic layer 3 is formed of silicone rubber, it is preferable to have a certain layer thickness to prevent the silicone oligomer from bleeding out on the surface of the urethane coating layer 4, for example, urethane coating
- the layer 4 preferably has a layer thickness of 2 to 50 ⁇ m, more preferably 5 to 30 ⁇ m.
- the silicone oligomer that leaks from the silicone elastic layer 3 is the conductive roller 1. It is difficult to bleed out on the surface, and it becomes difficult to contaminate the contact body of the conductive roller 1, and it can contribute to forming a high quality image.
- the urethane coat layer 4 contains a urethane resin, a particulate amino resin 5, and, if desired, various additives which are usually used in various urethane resin compositions.
- the urethane resin may be any known urethane resin and is usually obtained from a polyol and a polyisocyanate.
- the urethane resin is preferably a polyester polyol and a polyether polyol in that the object of the present invention can be well achieved.
- Examples of the polyisocyanate include aliphatic polyisocyanates and aromatic polyisocyanates. The polyol and the isocyanate will be described later.
- the particulate amino resin 5 is a particle formed of an amino resin.
- the amino resin is a resin obtained by condensation reaction of a compound having a functional group having an active hydrogen atom bonded to a nitrogen atom, for example, an amino group or an imino group, with formaldehyde, for example, guanamine resin, urea resin, Examples thereof include melamine resin and aniline resin.
- the amino resin preferably contains at least one of guanamine resin, urea resin, melamine resin and aniline resin, and among these, guanamine resin is more preferably contained in that the object of the present invention can be well achieved, guanamine Particularly preferred is a resin.
- This guanamine resin is a condensation reaction product of guanamine or its derivative and formaldehyde, and as a guanamine derivative, 2,4-diamino-6-alkyl-1,3,5-triazine, 2,4-diamino-6-aryl And -1,3,5-triazine, or compounds in which the hydrogen atom of the amino group of these and guanamine is substituted with an alkyl group, an aryl group or the like, and the like.
- the alkyl group is an alkyl group having 1 to 8 carbon atoms, for example, methyl group, ethyl group, propyl group (for example, n-propyl group, i-propyl group), butyl group (for example, n-butyl group, i-Butyl group, s-butyl group, t-butyl group), pentyl group (eg, n-pentyl group, i-pentyl group, s-pentyl group), hexyl group (eg, n-hexyl group, i-hexyl group) Group, s-hexyl group), octyl group and the like.
- guanamine resins As an aryl group, a phenyl group, a tolyl group, a dimethylphenyl group etc. are mentioned, for example.
- guanamine resins guanamine resin which is a condensation reaction product of guanamine and formaldehyde, and aryl group-substituted guanamine resin which is a condensation reaction product of 2,4-diamino-6-aryl-1,3,5-triazine and formaldehyde
- benzoguanamine resin which is a condensation reaction product of benzoguanamine and formaldehyde is preferable.
- the shape of the particulate amino resin 5 is not particularly limited as long as it is in the form of an independent solid such as particles and powder, and examples thereof include spheres, oval spheres, and plates, with spheres being preferred.
- the average particle diameter of the particulate amino resin 5 is preferably determined appropriately in consideration of the layer thickness of the urethane coating layer 4, for example, is stably contained in the urethane coating layer 4, and the urethane coating layer 4
- the average particle diameter of the particulate amino resin 5 is such that the surface roughness of the conductive roller 1, that is, the urethane coating layer 4 is in the above range and the physical transport characteristics of the developer are excellent.
- the thickness is preferably smaller than twice the layer thickness of the urethane coating layer 4.
- the average particle diameter of the particulate amino resin 5 is preferably 2 ⁇ m or more, preferably 5 ⁇ m or more, in that the content thereof can be reduced without impairing the effects of the particulate amino resin 5.
- the upper limit value of the average particle diameter is not particularly limited, but is preferably smaller than twice the layer thickness of the urethane coating layer 4 and can be, for example, 50 ⁇ m.
- the particulate amino resin 5 has an appropriate size in that the silicone oligomer can be prevented from bleeding out to the surface of the urethane coating layer 4.
- the urethane coating layer 4 having a layer thickness in the above range for example, it is preferable to have an average particle diameter of 2 to 30 ⁇ m, and have an average particle diameter of 5 to 20 ⁇ m. Is particularly preferred.
- the urethane coating layer 4 containing the particulate amino resin 5 having an average particle diameter in the above-mentioned range is provided, in addition to the prevention of the occurrence of filming over a long period and the long-term retention of the excellent charging characteristics, Even if the conductive roller 1 is provided with the silicone elastic layer 3, the silicone oligomer which leaks from the silicone elastic layer 3 is more difficult to bleed out due to the surface of the conductive roller 1, and the contact body of the conductive roller 1 is less likely to be contaminated.
- the average particle diameter of the particulate amino resin 5 is determined by measuring the maximum outside diameter of a plurality of particulate amino resins 5 observed at a magnification of 2000 times using a scanning electron microscope JSM-5200 (manufactured by Nippon Denshi Datum Co., Ltd.) And the arithmetic mean of the measured maximum outside diameters.
- the particulate amino resin 5 can be produced by pulverizing an amino resin, a suspension polymerization method or the like, and can also purchase a commercially available product.
- the content of the particulate amino resin 5 in the urethane coat layer 4 is preferably 10 to 70 parts by mass, and is 20 to 60 parts by mass with respect to 100 parts by mass of the urethane resin forming the urethane coat layer 4. Is particularly preferred.
- the content of the particulate amino resin 5 is within the above range, the charging characteristics can be improved without significantly increasing the surface hardness of the urethane coating layer 4, and the average particle diameter is within the above range.
- the content of the amino resin 5 is within the above range, physical transport properties of the developer, bleeding out of the silicone oligomer, etc. are prevented in addition to long-term prevention of filming and long-term retention of excellent charging properties. Can also be improved effectively.
- the particulate amino resin 5 is present in the urethane coating layer 4 alone or as a complex with a urethane resin. At this time, even if the amino resin forms a complex with the urethane resin, the form is maintained. For example, the presence of the particulate amino resin 5 can be confirmed by observing the cross section of the urethane coating layer 4 .
- the various additives may be any additives that are usually used in various urethane resin compositions as desired.
- chain extenders For example, chain extenders, conductivity imparting agents, catalysts, surfactants, flame retardants, colorants, fillers, plastic Agents, stabilizers, mold release agents and the like.
- the conductive roller 1 provided with the urethane coating layer 4 containing such particulate amino resin 5 is particulate since the particulate amino resin 5 is present in the form of particles in the urethane coating layer 4.
- Amino resin 5 is hard to come off from the urethane coat layer 4 and the hardness of the urethane coat layer 4 can be kept low. For example, even when used as a developing roller for a long time, filming can be prevented from occurring for a long time and The agent can be charged to the desired charge level.
- the conductive roller 1 Since the conductive roller 1 has the above characteristics, it is suitably used as a conductive roller for an image forming apparatus, for example, a charging roller, a developing roller, a developer supply roller, a transfer roller, a cleaning roller, etc. It is suitably used as a developing roller.
- the conductive roller according to the present invention for example, the conductive roller 1 is manufactured by forming the elastic layer 3 on the outer peripheral surface of the shaft 2 and then forming the urethane coat layer 4 on the outer peripheral surface of the elastic layer 3 .
- the shaft 2 is prepared.
- the shaft 2 is prepared in a desired shape by a known method.
- the shaft 2 may be coated with a primer before the elastic layer 3 is formed.
- the primer applied to the shaft 2 is not particularly limited.
- the primer is, if desired, dissolved in a solvent or the like and applied to the outer peripheral surface of the shaft according to a standard method, for example, a dip method, a spray method or the like.
- the rubber composition is heated and cured on the outer peripheral surface of the shaft 2 by a known molding method to form the elastic layer 3.
- the molding method is not particularly limited, for example, continuous vulcanization by extrusion molding, molding by press, injection and the like.
- the heating temperature and heating time for curing the silicone rubber composition are appropriately selected according to the rubber composition.
- the surface of the elastic layer 3 formed in this manner is optionally ground and ground to adjust the outer diameter, the surface condition, and the like. If desired, a primer or the like is applied to the outer peripheral surface of the elastic layer 3.
- the rubber composition or the flexible resin composition forming the elastic layer 3 may be a composition containing a rubber and / or a flexible resin, and optionally contains a conductivity imparting agent, various additives, etc.
- a conductivity imparting agent may be liquid or solid, and examples thereof include conductive powder and ion conductive material.
- Specific examples of the conductive powder include, in addition to conductive carbon such as ketjen black and acetylene black, rubber carbons such as SAF, ISAF, HAF, FEF, GPF, SRF, FT, MT, etc.
- metals such as titanium oxide, zinc oxide, nickel, copper, silver, germanium and the like, and further, metal oxides, conductive polymers such as polyaniline, polypyrrole and polyacetylene, etc.
- the ion conductive substance is more specifically
- inorganic ionic conductive substances such as sodium perchlorate, lithium perchlorate, calcium perchlorate, lithium chloride and the like can be mentioned.
- the conductivity imparting agent is added at an appropriate content so as to obtain a desired electric resistance when the conductive roller 1 is used singly or in combination of two or more.
- the content of the conductivity imparting agent can be 2 to 80 parts by mass with respect to 100 parts by mass of the rubber or flexible resin.
- additives examples include various additives contained in rubber compositions or flexible resin compositions, for example, auxiliary agents such as chain extenders and crosslinking agents, catalysts, dispersants, foaming agents, antiaging agents, Antioxidants, fillers, pigments, colorants, processing aids, softeners, plasticizers, emulsifiers, heat resistance improvers, flame retardancy improvers, acid acceptors, heat conductivity improvers, mold release agents, solvents Etc.
- auxiliary agents such as chain extenders and crosslinking agents, catalysts, dispersants, foaming agents, antiaging agents, Antioxidants, fillers, pigments, colorants, processing aids, softeners, plasticizers, emulsifiers, heat resistance improvers, flame retardancy improvers, acid acceptors, heat conductivity improvers, mold release agents, solvents Etc.
- auxiliary agents such as chain extenders and crosslinking agents, catalysts, dispersants, foaming agents, antiaging agents, Antioxidants, fillers, pigments,
- the silicone rubber composition containing a silicone rubber contains a silicone rubber, optionally a conductivity imparting agent, and optionally various additives.
- the silicone rubber is as described above, and may be a liquid type or a millable type, and can be appropriately selected according to the method of forming the elastic layer 3, the characteristics required of the elastic layer 3 and the like.
- the addition-curable millable conductive silicone rubber composition may have (A) an average composition formula: R n SiO (4-n) / 2 (R may be the same or different, substituted or unsubstituted monovalent carbonization
- R may be the same or different, substituted or unsubstituted monovalent carbonization
- a hydrogen group preferably a monovalent hydrocarbon group having 1 to 12 carbon atoms, more preferably 1 to 8 carbon atoms, and n is a positive number of 1.95 to 2.05. It contains a conductive material other than those belonging to polysiloxane, (B) filler, and (C) the above-mentioned (B) component.
- the addition-curable liquid conductive silicone rubber composition comprises (D) an organopolysiloxane containing at least two alkenyl groups bonded to a silicon atom in one molecule, and (E) a silicon atom bonded in one molecule.
- addition-curable liquid conductive silicone rubber compositions containing a property imparting agent and (H) addition reaction catalyst may be mentioned.
- These components (D) to (H) are basically the same as the components in the “addition-curable liquid conductive silicone rubber composition” described in, for example, JP-A-2008-058622.
- the rubber composition or the flexible resin composition can be selected from rubber and / or flexible resin, using a rubber kneader such as a double roller, a triple roller, a roll mill, a Banbury mixer, a dough mixer (kneader), etc.
- the mixture is obtained, for example, by kneading under normal temperature or heating for several minutes to several hours, preferably 5 minutes to 1 hour, until the conductivity imparting agent and the various additives are uniformly mixed.
- the surface of the elastic layer 3 formed around the shaft body 2 is polished and ground, if necessary, to adjust the outer diameter, the surface condition, and the like.
- the said primer layer may be formed in the outer peripheral surface before elastic layer 3 formed in this way is formed.
- the urethane coating layer 4 applies the urethane resin composition mentioned later to the elastic layer 3 formed in this way, or the outer peripheral surface of the primer layer optionally formed on the outer peripheral surface of the elastic layer 3, and then The composition is formed by heat curing the coated urethane resin composition.
- the coating of the urethane resin composition can be performed, for example, by a coating method of coating a coating liquid of a urethane resin composition, a dipping method of immersing the elastic layer 3 or the like in the coating liquid, the elastic layer 3 etc. It carries out by well-known coating methods, such as the spray-coating method sprayed to.
- the urethane resin composition may be coated as it is, or the urethane resin composition may be, for example, an alcohol such as methanol and ethanol, an aromatic solvent such as xylene and toluene, or an ester solvent such as ethyl acetate and butyl acetate Or the like, or a coating solution to which water is added may be applied.
- the method of curing the urethane resin composition coated in this manner may be any method as long as the heat necessary for curing the urethane resin composition can be added, for example, the elasticity with which the urethane resin composition is applied The method etc. which heat layer 3 grade
- the heating temperature for heating and curing the urethane resin composition is, for example, preferably 60 to 200 ° C., particularly 120 to 160 ° C., and the heating time is preferably 10 to 120 minutes, particularly 30 to 60 minutes.
- the urethane resin composition was laminated on the outer peripheral surface of the elastic layer 3 or the primer layer by a known molding method such as extrusion molding, press molding, injection molding or the like, or The method etc. which harden
- the urethane resin composition for forming the urethane coat layer 4 contains a urethane adjusting component which is a precursor for forming a urethane resin, a particulate amino resin 5 and, if desired, various additives.
- the particulate amino resin 5 and various additives in the urethane resin composition are as described above.
- the urethane adjusting component may be any component capable of forming a polyurethane, and includes, for example, a polyurethane obtained by reacting a polyol and a polyisocyanate.
- the urethane preparation component is at least selected from the group consisting of, for example, polyurethane, a mixture of a polyol and a polyisocyanate or a blocked polyisocyanate, and a prepolymer obtained by reacting a polyol and a polyisocyanate or a blocked polyisocyanate.
- One component is mentioned.
- the polyol may be any of various polyols generally used for the preparation of polyurethane, and examples thereof include monomeric polyols, polyether polyols and polyester polyols. Among them, the abrasion resistance of the urethane coated layer 4, It is preferable that it is at least one selected from polyether polyols and polyester polyols from the viewpoint of being excellent in electric stability, water resistance, and the like.
- a monomer polyol for example, ethylene glycol, propylene glycol, butylene glycol, benzyl glycol, hexylene glycol, octylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, 1,2,4-butanetriol, 1,2,3-propanetriol, 1,2,6-hexanetriol and the like.
- polyether polyol examples include polyalkylene glycols such as polyethylene glycol, polypropylene glycol and polypropylene glycol-ethylene glycol, polytetramethylene ether glycol, copolymerized polyols of tetrahydrofuran and alkylene oxide, and various modified products thereof or the like These mixtures etc. are mentioned.
- polyester polyol examples include condensation type polyester polyols obtained by condensation of dicarboxylic acids such as adipic acid with polyols such as ethylene glycol and hexanediol, lactone type polyester polyols, polycarbonate polyols, and mixtures thereof It can be mentioned.
- the polyether polyol and the polyester polyol may be used singly or in combination of two or more, and may be used in combination of a polyether polyol and a polyester polyol.
- the polyol is preferably a polyester polyol in that it is excellent in thermal stability.
- the polyol preferably has a number average molecular weight of 1000 to 8000, and more preferably a number average molecular weight of 1000 to 5000, from the viewpoint of excellent compatibility with the later-described polyisocyanate and the like.
- the number average molecular weight is a molecular weight as converted to standard polystyrene by gel permeation chromatography (GPC).
- the said polyisocyanate should just be various polyisocyanate normally used for preparation of a polyurethane, for example, aliphatic polyisocyanate, aromatic polyisocyanate, these derivatives, etc. are mentioned.
- the polyisocyanate is preferably an aliphatic polyisocyanate in terms of excellent storage stability and easy control of the reaction rate.
- aromatic polyisocyanate for example, xylylene diisocyanate (XDI), diphenylmethane diisocyanate (MDI), toluene diisocyanate (also referred to as tolylene diisocyanate.
- TDI 3,3′-bitrylene-4,4′-diisocyanate, 3 , 3'-Dimethyldiphenylmethane-4,4'-diisocyanate, 2,4-tolylene diisocyanate uretidinedione (dimer of 2,4-TDI), xylene diisocyanate, naphthalene diisocyanate (NDI), paraphenylene diisocyanate (PDI) ), Tolidine diisocyanate (TODI), metaphenylene diisocyanate and the like.
- aliphatic polyisocyanates examples include hexamethylene diisocyanate (HDI), 4,4'-dicyclohexylmethane diisocyanate (hydrogenated MDI), ortho toluidine diisocyanate, lysine diisocyanate methyl ester, isophorone diisocyanate (IPDI), norbornane diisocyanate methyl, trans Examples thereof include cyclohexane-1,4-diisocyanate, triphenylmethane-4,4 ', 4' '-triisocyanate and the like.
- HDI hexamethylene diisocyanate
- MDI 4,4'-dicyclohexylmethane diisocyanate
- IPDI isophorone diisocyanate
- trans examples thereof include cyclohexane-1,4-diisocyanate, triphenylmethane-4,4 ', 4' '-triisocyanate and the like.
- the derivative examples include a polynuclear body of the polyisocyanate, a urethane modified product modified with a polyol or the like (including a urethane prepolymer), a dimer due to urethidione formation, an isocyanurate modified product, a carbodiimide modified product, a uretonimine modified product, an allophanate modified Products, urea-modified products, burette-modified products, and the like.
- the said polyisocyanate can be used individually by 1 type or 2 types or more.
- the polyisocyanate preferably has a molecular weight of 500 to 2000, more preferably 700 to 1500.
- blocked polyisocyanates in addition to these polyisocyanates, blocked polyisocyanates in which an isocyanate group is blocked with a blocking agent are suitably used.
- Blocked polyisocyanates have advantages such as high stability at normal temperature and ease of handling since the blocking agent is liberated by heating to regenerate isocyanate groups. In particular, it has the advantage that it reacts stably even in humid summer months, and can also be used in combination with a reagent having a highly reactive active group such as an amino group.
- the blocking agent include ⁇ -caprolactam, methylethyl ketoximes, 3,5-dimethylpyrazoles, alcohols and phenols.
- isocyanates are also mentioned as a blocking agent, In this case, the block polyisocyanate becomes a polyisocyanate dimer (polyuretdione).
- the blocking agent any of the above may be used, but ⁇ -caprolactams and methylethyl ketoximetics are preferable in terms of excellent compatibility with the solvent.
- the mixing ratio in the mixture of the polyol and the polyisocyanate is not particularly limited, but usually, the hydroxyl group (OH) contained in the polyol and the isocyanate group contained in the polyisocyanate (NCO, isocyanate group which can be released in the case of block polyisocyanate)
- the molar ratio (NCO / OH) with respect to () is 0.7 to 2.00.
- the molar ratio (NCO / OH) is more preferably 0.85 to 1.60 from the viewpoint of preventing hydrolysis of the polyurethane.
- an auxiliary agent generally used for the reaction of the polyol and the polyisocyanate for example, a chain extender, a crosslinking agent, etc. may be used in combination.
- chain extenders and crosslinking agents include glycols, hexanetriol, trimethylolpropane and amines.
- the prepolymer and the polyurethane may be a prepolymer and a polyurethane obtained by reacting the polyol and the polyisocyanate, and their molecular weight and the like are not particularly limited.
- the prepolymer and the polyurethane are obtained by reacting the polyol and the polyisocyanate by the one-shot method, the prepolymer method or the like, if necessary, in the presence of the auxiliaries and the like.
- the urethane preparation component is preferably a mixture of a polyol and a polyisocyanate, and particularly preferably a mixture of at least one polyol selected from polyether polyols and polyester polyols and polyisocyanates. That is, the urethane resin composition particularly preferably contains a mixture of at least one polyol selected from polyether polyols and polyester polyols, and polyisocyanate.
- the urethane resin composition is mixed at normal temperature or under heating, for example, for several minutes to several hours, preferably for 5 minutes to 1 hour, until the components are uniformly mixed using a mixer, a mixer such as planetary, etc. Can be obtained.
- the particulate amino resin 5 is dispersed in the state of retaining its form.
- the surface state can also be adjusted by subjecting the urethane coating layer 4 thus formed to a polishing treatment, a surface roughness treatment such as a blasting treatment, if desired.
- the developing device according to the present invention comprises the conductive roller according to the present invention, and is provided, for example, in the image forming apparatus shown in FIG.
- a developing device which is an embodiment of a developing device according to the present invention will be described together with an example of an image forming apparatus (hereinafter, may be referred to as an image forming apparatus according to the present invention).
- this image forming apparatus 10 serially connects a plurality of image carriers 11 B, 11 C, 11 M and 11 Y mounted on developing units B, C, M and Y of respective colors onto a transfer conveyance belt 6.
- the developing units B, C, M and Y are arranged in series on the transfer conveying belt 6.
- the developing unit B includes an image carrier 11B such as a photosensitive member (also referred to as a photosensitive drum), a charging unit 12B such as a charging roller, an exposure unit 13B, a developing device 20B, and an image carrying unit
- the transfer means 14B for example, a transfer roller, which is in contact with the body 11B, and a cleaning means 15B are provided.
- the developing device 20B is an example of the developing device according to the present invention, and as shown in FIG. 3, includes the conductive roller according to the present invention and the developer 22B. Therefore, in the image forming apparatus 10, the conductive roller 1 is mounted as the developer carrier 23B, 23C, 23M and 23Y.
- the developing device 20B is a housing 21B that contains a one-component nonmagnetic developer 22B, a developing roller that is a developer carrier 23B that supplies the developer 22B to the image carrier 11B, and a developer
- the developer amount adjusting means 24B for adjusting the thickness of the layer 22B, for example, a blade, is provided.
- the developing device 20B as shown in FIG.
- the developer amount adjusting means 24B is in contact with or in pressure contact with the outer peripheral surface of the developer carrier 23B. That is, the developing device 20B is a so-called "contact type developing device".
- the developing units C, M and Y are basically configured in the same manner as the developing unit B.
- the developer carrier 23B of the developing device 20B is disposed such that the surface thereof is in contact with or in pressure contact with the surface of the image carrier 11B.
- the developing devices 20C, 20M and 20Y are arranged such that the developer carriers 23C, 23M and 23Y contact or press the surfaces of the image carriers 11C, 11M and 11Y. That is, the image forming apparatus 10 is a so-called "contact image forming apparatus".
- the fixing unit 30 is disposed downstream of the developing unit Y.
- the fixing unit 30 includes a fixing roller 31, an endless belt supporting roller 33 disposed in the vicinity of the fixing roller 31, a fixing roller 31 and an endless belt supporting roller in a housing having an opening 35 through which the recording medium 16 passes.
- the pressure heat fixing device is rotatably supported by the At the bottom of the image forming apparatus 10, a cassette 41 for storing the recording material 16 is installed.
- the transfer conveyance belt 6 is wound around a plurality of support rollers 42.
- the developers 22B, 22C, 22M and 22Y used in the image forming apparatus 10 may be either dry developers or wet developers as long as they can be charged by friction, and magnetic development is possible even with non-magnetic developers. It may be an agent.
- the single-component nonmagnetic black developer 22B, cyan developer 22C, magenta developer 22M and yellow developer 22Y are accommodated in the housings 21B, 21C, 21M and 21Y of the respective developing units.
- the image forming apparatus 10 forms a color image on the recording material 16 as follows. First, in the developing unit B, an electrostatic latent image is formed by the exposure unit 13B on the surface of the image carrier 11B charged by the charging unit 12B, and a black electrostatic latent image is formed by the developer 22B supplied by the developer carrier 23B. The image is developed. Then, when the recording material 16 passes between the transfer means 14B and the image carrier 11B, a black electrostatic latent image is transferred onto the surface of the recording material 16B.
- the fixing device 30 fixes the color image to the recording medium 16 as a permanent image, as the recording medium 16 in which the color image is developed.
- a color image can be formed on the recording material 16.
- the conductive roller 1 when the conductive roller 1 is used as the developer carrier 23, the conductive roller 1 has a urethane coat layer 4 containing a urethane resin and a particulate amino resin as the outer periphery of the elastic layer 3. Since it is provided on the surface, even if the developer carrier 23 is used for a long time, the developer does not easily adhere to the surface of the urethane coating layer 4 in the form of a film and filming does not easily occur. It can be conveyed to the image carrier 11 while being charged to an amount.
- the developing device and the image forming apparatus 10 are provided with the conductive roller 1 as the developer carrier 23, it is difficult for the developer to adhere to the surface of the urethane coat layer 4 of the conductive roller 1 in the form of a film.
- the developer can be conveyed while being charged to a desired charge amount and supplied to the image carrier 11. Therefore, according to the present invention, a conductive roller capable of preventing the occurrence of filming over a long period of time and charging the developer to a desired charge amount, and a developing device capable of forming a high quality image over a long period of time An image forming apparatus can be provided.
- the image forming apparatus 10 is, for example, an image forming apparatus such as a copying machine, a facsimile, or a printer. Although the image forming apparatus 10 has been described with reference to an example in which the conductive roller 1 is used as a developing roller which is an example of the developer carrier 23, the conductive roller according to the present invention is used as the developer supply roller. Even in the same way, high quality images can be formed.
- the conductive roller, the developing device and the image forming apparatus according to the present invention are not limited to the above-described embodiment, and various modifications can be made as long as the object of the present invention can be achieved. .
- the conductive roller 1 has a so-called straight shape in which the outer diameter is substantially the same from one end to the other end in the axial direction, but in the present invention, the developing roller has a cylindrical shape.
- the shape is not particularly limited.
- the outer diameter at the central portion in the axial direction may be a so-called inverted crown shape smaller than the outer diameter at the both ends, and the outer at the central portion in the axial direction
- the diameter may be a so-called crown shape that is larger than the outer diameter at both ends.
- the conductive roller according to the present invention may have another layer between the elastic layer and the urethane coating layer.
- attach or adhere an elastic layer and a urethane coating layer are mentioned, for example.
- a material for forming the primer layer for example, alkyd resin, alkyd resin modified substance such as phenol modification / silicone modification, oil free alkyd resin, acrylic resin, silicone resin, epoxy resin, fluorocarbon resin, phenol resin, polyamide resin, urethane And resins and mixtures thereof.
- crosslinking agent which harden
- the primer layer is formed, for example, to a thickness of 0.1 to 10 ⁇ m.
- the image forming apparatus 10 is an electrophotographic image forming apparatus
- the image forming apparatus is not limited to the electrophotographic system, and may be, for example, an electrostatic image forming apparatus. Good.
- the image forming apparatus in which the conductive roller according to the present invention is disposed is not limited to a tandem type color image forming apparatus in which a plurality of image carriers having developing units of respective colors are arranged in series on a transfer conveyance belt.
- a monochrome image forming apparatus provided with a single developing unit, a four-cycle color image forming apparatus in which a developer image carried on an image carrier is sequentially transferred to an endless belt sequentially may be used.
- the developer 22 used in the image forming apparatus 10 is a one-component nonmagnetic developer, but in the present invention, it may be a one-component magnetic developer or a two-component nonmagnetic developer. Also, it may be a two-component magnetic developer.
- the image forming apparatus 10 is a so-called “contact image forming apparatus” in which the image carrier 11 and the development carrier 23 of the developing device 20 are in contact or in pressure contact with each other.
- the apparatus may be a so-called “non-contact image forming apparatus” which is disposed with a gap so that the surface of the developer carrier does not contact the surface of the image carrier.
- the developing device 20 in the image forming apparatus 10 is a so-called “contact type developing device” in which the developer regulating member 24 and the developer carrier 23 are disposed so as to abut or press against each other.
- the apparatus may be a so-called “non-contact developing apparatus” which is disposed with a gap so that the developer regulating member does not contact the outer peripheral surface of the developer carrier.
- Example 1 The shaft 2 (made by SUM22, diameter 7.5 mm, length 281.5 mm) to which electroless nickel plating treatment has been applied is washed with toluene, and a silicone primer (trade name "Primer No. 16", Shin-Etsu Co., Ltd.) Chemical industry Co., Ltd. make) was applied.
- the primer-treated shaft 2 was fired at a temperature of 150 ° C. for 10 minutes using a gear oven, and then cooled at normal temperature for 30 minutes or more to form a primer layer on the surface of the shaft 2.
- methyl hydrogen polysiloxane (E) having a Si-H group at both ends and in a side chain (polymerization degree 17, Si-H content 0.0060 mol / g) 2. 1 part by mass, 0.1 parts by mass of ethynyl cyclohexanol as a reaction control agent, and 0.1 parts by mass of platinum catalyst (H) (Pt concentration: 1%) are added, and the mixture is stirred for 15 minutes and kneaded.
- a curable liquid conductive silicone rubber composition was prepared.
- the prepared addition-curable liquid conductive silicone rubber composition was molded on the outer peripheral surface of the shaft 2 by liquid injection molding.
- the molded body was polished to form an elastic layer 3 having an outer diameter of 20 mm.
- the JIS A hardness of the elastic layer 3 was measured according to the method described above and found to be 40, and the electrical resistance measured according to the method described above was 1.0 ⁇ 10 5 ⁇ .
- a urethane resin composition for forming a urethane coat layer 4 having the following composition was prepared.
- Polyisocyanate manufactured by Nippon Polyurethane Co., Ltd., trade name: Coronate-LJ
- Polyol polyyester polyol, trade name "Nipporan NIPPOLLAN 139", manufactured by Nippon Polyurethane Co., Ltd.
- Conductivity imparting agent trade name “EC 600 JD”, manufactured by Lion Corporation, average particle diameter 34 nm
- Particles of benzoguanamine resin trade name “L15” manufactured by Nippon Shokubai Co., Ltd., substantially spherical according to the measurement method 10 parts by mass with an average particle diameter of 12 ⁇ m (the converted content when the total mass of the polyisocyanate and the polyol is 100 parts by mass is 25 parts by mass)
- the urethane resin composition was applied to the outer peripheral surface of the elastic layer 3 formed on the outer peripheral surface of the shaft 2 at one time by a spray coating method. Then, it heated at 160 degreeC for 30 minutes, and formed the urethane-coat layer 4 with a layer thickness of 12 micrometers. Thus, the conductive roller of Example 1 was manufactured.
- Example 2 to 4 The content of particles of the benzoguanamine resin is 4 parts by mass (the conversion content is 10 parts by mass), 20 parts by mass (the conversion content is 50 parts by mass) and 28 parts by mass (the conversion content is 70 parts by mass)
- the conductive rollers of Examples 2 to 4 were manufactured basically in the same manner as Example 1 except that they were changed to the above.
- Examples 5 and 6 The particles of the benzoguanamine resin are crushed by a urea resin (trade name "Fleamine M", manufactured by Taiwa Co., Ltd.) or a melamine resin (trade name "Preamine Z", manufactured by Taiwa Co., Ltd.) with a grinder (trade name: Counterjet mill AFG (trade name) Example 1 and Basic except that it was crushed by Hosokawa Micron Corporation) and then changed to particles of average particle diameter 12 ⁇ m classified by using particle classifier (trade name: Elbow Jet (manufactured by Nittetsu Mining Co., Ltd.))
- the conductive rollers of Examples 5 and 6 were respectively manufactured in the same manner.
- Examples 7 to 9 The conductive rollers of Examples 7 to 9 were manufactured basically in the same manner as Example 1 except that the layer thickness of the urethane coat layer 4 was changed to 7 ⁇ m, 17 ⁇ m and 22 ⁇ m respectively.
- Comparative example 1 It is carried out except that the particles of the above-mentioned benzoguanamine resin are changed to particles of inorganic filler "silicon dioxide" (trade name “Hypresica TS", spherical by Ube Nitto Kasei Co., Ltd., average particle diameter 12 ⁇ m according to the measurement method).
- a conductive roller of Comparative Example 1 was manufactured basically in the same manner as Example 1.
- Comparative example 2 Conductivity of Comparative Example 2 in the same manner as Example 1 except that the particles of the benzoguanamine resin were changed to particles of PMMA resin (trade name “FH-S015” manufactured by Toyobo Co., Ltd., average particle diameter 12 ⁇ m) Roller was manufactured.
- PMMA resin trade name “FH-S015” manufactured by Toyobo Co., Ltd., average particle diameter 12 ⁇ m
- Example 3 10 parts by mass of benzoguanamine resin (trade name "BL-60", manufactured by Sanwa Chemical Co., Ltd.) in addition to the above-mentioned polyisocyanate and the above-mentioned polyol as a resin component for forming the urethane coat layer 4 and particles of the above-mentioned benzoguanamine resin Basically the same as Example 1 except using 10 parts by mass (the above-mentioned content is 25 parts by mass) of silicon dioxide particles (trade name "Hipresica TS", manufactured by Ube Nitto Kasei Co., Ltd.) instead of Then, a conductive roller of Comparative Example 3 provided with a composite coating layer composed of a urethane resin containing particles of silicon dioxide and an amino resin was produced.
- benzoguanamine resin trade name "BL-60", manufactured by Sanwa Chemical Co., Ltd.
- Table 1 shows the results of measuring JIS A hardness, ten-point average roughness Rz and electrical resistance in each conductive roller produced in this manner according to the above-mentioned method.
- Each conductive roller manufactured is attached as a developing roller to a contact type image forming apparatus (trade name "MICROLINE 1032 PS, manufactured by Oki Data Co., Ltd.), and under an environment of temperature 23 ° C. and relative humidity 55%, A4 paper After printing 500 sheets of halftone images at a printing density of 2% according to (JIS), the surface of the conductive roller taken out from the image forming apparatus was visually observed to determine the presence or absence of filming.
- a contact type image forming apparatus trade name "MICROLINE 1032 PS, manufactured by Oki Data Co., Ltd.
- Comparative Examples 1 and 2 In the filming evaluation after a long period of time after printing 500 sheets, in Comparative Examples 1 and 2, it is assumed that particles of silicon dioxide or PMMA fall off from the urethane coating layer and filming occurs, and Comparative Example 3 is silicon dioxide It is inferred that filming occurred as a result of giving a large stress to the developer because the hardness of the coating layer containing the benzoguanamine resin is high in addition to the particles of the above falling off from the urethane coating layer.
- a conductive roller was attached to an image forming apparatus (made by Oki Data Co., Ltd., trade name “MICROLINE 1032PS, resolution equivalent to 1200 dpi) under an environment of 20 ° C. and a relative humidity of 50%, and five sheets of black solid printing were performed. After that, the sixth black solid print is forcibly stopped, the conductive roller is removed from the image forming apparatus, and the charge amount of the developer adhering to the surface of the conductive roller is a suction of a cross-sectional area of 0.25 cm 2 It measured with the suction type small-sized electrostatic charge measurement apparatus (brand name "210HS q / M METER", Trek Japan KK make) which has a mouth.
- the suction type small-sized electrostatic charge measurement apparatus brand name "210HS q / M METER", Trek Japan KK make
- Comparative Examples 1 and 2 have essentially no effect of improving the charging characteristics on the particles of silicon dioxide or PMMA, and these particles fall off from the urethane coating layer to cause the filming to deteriorate. It is inferred that in Comparative Example 3, although the silicon dioxide particles do not have the effect of improving the charging characteristics, the charging characteristics are considered to be excellent due to the benzoguanamine resin contained in the coating layer.
- the evaluation was made as “ ⁇ ” when the measured print density difference was 0.1 or less, and “O” when the measured print density difference was more than 0.1 and 0.2 or less.
- the case where the print density difference was more than 0.2 and 0.3 or less was regarded as “ ⁇ ⁇ ”, and the case where the measured print density difference was 0.3 or more was regarded as “ ⁇ ”.
- the print density difference becomes large, and when the evaluation of the print density difference is “ ⁇ ⁇ ” or more, the low molecular component bleeds out The amount is well within the acceptable range.
- Table 1 The results are shown in Table 1.
- the conductive roller according to the present invention is suitably used as a conductive roller for an image forming apparatus, for example, a charging roller, a developing roller, a developer supply roller, a transfer roller, a cleaning roller, etc. It is preferably used as a developing roller which can prevent the toner and can charge the developer to a desired charge amount.
- the developing device and the image forming apparatus according to the present invention are suitably used as a developing device and an image forming apparatus capable of forming high quality images over a long period of time.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Dry Development In Electrophotography (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
(A)アミノ樹脂
(B)ジイソシアネート
(C)ガラス転移温度(Tg)が0℃以下の樹脂
(D)導電剤
0.5>(A)/[(A)+(C)]≧0.3 ・・・ (α)
0.6>[(A)+(B)]/[(A)+(B)+(C)]≧0.3 ・・・ (β)
」が記載されている。
前記アミノ樹脂はグアナミン樹脂、ユリア樹脂、メラミン樹脂及びアニリン樹脂からなる群より選択される少なくとも1種を含むことであり、
前記アミノ樹脂はグアナミン樹脂を含むことであり、
前記グアナミン樹脂はベンゾグアナミン樹脂を含むことであり、
前記アミノ樹脂は前記ウレタン樹脂100質量部に対して10~70質量部の割合で含有されていることである。
無電解ニッケルメッキ処理が施された軸体2(SUM22製、直径7.5mm、長さ281.5mm)をトルエンで洗浄し、その表面にシリコーン系プライマー(商品名「プライマーNo.16」、信越化学工業株式会社製)を塗布した。プライマー処理した軸体2を、ギヤオーブンを用いて、150℃の温度にて10分焼成処理した後、常温にて30分以上冷却し、軸体2の表面にプライマー層を形成した。
・ポリイソシアネート(日本ポリウレタン株式会社製、商品名:コロネート-LJ)10質量部
・ポリオール(ポリエステルポリオール、商品名「ニッポランNIPPOLLAN 139」、日本ポリウレタン株式会社製)30質量部(モル比(NCO/OH=1.05)
・導電性付与剤(商品名「EC600JD」、ライオン株式会社製、平均粒径34nm)5質量部
・ベンゾグアナミン樹脂の粒子(商品名「L15」、日本触媒株式会社製、略球状で前記測定方法による平均粒径12μm)10質量部(前記ポリイソシアネート及び前記ポリオールの合計質量を100質量部としたときの換算含有量は25質量部)
前記ベンゾグアナミン樹脂の粒子の含有量を、4質量部(前記換算含有量は10質量部)、20質量部(前記換算含有量は50質量部)及び28質量部(前記換算含有量は70質量部)にそれぞれ変更したこと以外は実施例1と基本的に同様にして実施例2~4の導電性ローラをそれぞれ製造した。
前記ベンゾグアナミン樹脂の粒子を、ユリア樹脂(商品名「フレアミンM」、株式会社台和製)又はメラミン樹脂(商品名「プレアミンZ」、株式会社台和製)を粉砕機(商品名:カウンタジェットミル AFG(ホソカワミクロン株式会社製))により粉砕し、次いで粒子分級機(商品名:エルボージェット(日鉄鉱業社製)を用いて分級した平均粒径12μmの粒子にそれぞれ変更したこと以外は実施例1と基本的に同様にして実施例5及び6の導電性ローラをそれぞれ製造した。
前記ウレタンコート層4の層厚を、7μm、17μm及び22μmにそれぞれ変更したこと以外は実施例1と基本的に同様にして実施例7~9の導電性ローラをそれぞれ製造した。
前記ベンゾグアナミン樹脂の粒子を、無機系充填剤「二酸化珪素」の粒子(商品名「ハイプレシカTS」、宇部日東化成株式会社製、球状で前記測定方法による平均粒径12μm)に変更したこと以外は実施例1と基本的に同様にして比較例1の導電性ローラを製造した。
前記ベンゾグアナミン樹脂の粒子を、PMMA樹脂の粒子(商品名「FH-S015」東洋紡株式会社製、平均粒径12μm)に変更したこと以外は実施例1と基本的に同様にして比較例2の導電性ローラを製造した。
ウレタンコート層4を形成する樹脂成分として前記ポリイソシアネート及び前記ポリオールに加えてベンゾグアナミン樹脂(商品名「BL-60」、三和ケミカル株式会社製)10質量部を添加し、かつ前記ベンゾグアナミン樹脂の粒子に代えて二酸化珪素の粒子(商品名「ハイプレシカTS」、宇部日東化成株式会社製)10質量部(前記換算含有量は25質量部)を用いたこと以外は実施例1と基本的に同様にして、二酸化珪素の粒子を含有するウレタン樹脂とアミノ樹脂とからなる複合コート層を備えた比較例3の導電性ローラを製造した。
各導電性ローラをその軸線に垂直な平面で切断したときのウレタンコート層の切断面を電子顕微鏡で観測して断面写真を撮影し、ウレタンコート層内に粒子が存在するか否かを確認した。すべての実施例においてウレタンコート層4内にベンゾグアナミン樹脂の粒子が確認され、比較例1~3においてウレタンコート層内に二酸化珪素又はPMMA樹脂が確認された。
製造した各導電性ローラを接触型の画像形成装置(商品名「MICROLINE 1032PS」、沖データ株式会社製)に現像ローラとして装着し、温度23℃、相対湿度55%の環境下にて、A4用紙(JIS)に印字濃度2%でハーフトーン画像を500枚印刷後に、画像形成装置から取り出した導電性ローラの表面を目視で観察して、フィルミング発生の有無を判断した。評価は、現像剤の固着がなくフィルミングが発生していなかった場合を「◎」、現像剤が僅かに固着していたが画像形成にはほとんど影響がない程度であった場合を「○」、現像剤が固着していたが画像形成に許容範囲内の影響がある程度であった場合を「○×」、現像剤が固着しており、画像形成に許容できない程のフィルミングが発生していた場合を「×」とした。その結果を第1表に示す。
20℃、相対湿度50%の環境下において、導電性ローラを画像形成装置(沖データ株式会社製、商品名「MICROLINE 1032PS」、解像度1200dpi相当)に装着して、黒ベタ印字を5枚行った後、6枚目の黒ベタ印字を強制的に停止させて、導電性ローラを画像形成装置から取り出し、導電性ローラの表面に付着した現像剤の帯電量を、断面積0.25cm2の吸引口を有する吸引式小型帯電量測定装(商品名「210HS q/M METER」、トレックジャパン株式会社製)で測定した。評価は、現像剤の帯電量が-42(μC/g)以下であった場合を「◎」、帯電量が-41~-35(μC/g)であった場合を「○」、帯電量が-34~-30(μC/g)であった場合を「○×」、帯電量が-29(μC/g)以上であった場合を「×」とした。その測定値及び評価結果を第1表に示す。
製造した各導電性ローラを接触型の画像形成装置(商品名「MICROLINE 1032PS」、沖データ株式会社製)に現像ローラとして装着し、温度23℃、相対湿度55%の環境下にてA4用紙(JIS)にべた画像を一枚印刷した。引き続いて同環境下において印字濃度2%でハーフトーン画像を10,000枚印刷後に再度べた画像を一枚印刷した。ハーフトーン画像を印刷する前と後とに印刷された2枚のべた画像の印字濃度差を測定した。評価は、測定された印字濃度差が0.1以下であった場合を「◎」、測定された印字濃度差が0.1を超え0.2以下であった場合を「○」、測定された印字濃度差が0.2を超え0.3以下であった場合を「○×」、測定された印字濃度差が0.3を超えていた場合を「×」とした。その結果を第1表に示す。
接触型の画像形成装置(商品名「MICROLINE 1032PS」、沖データ株式会社製)におけるカートリッジに、製造した各導電性ローラを装着して、温度50℃、相対湿度90%の環境下でべた印字画像を印字した。このべた印字画画像の印字濃度を初期印字濃度として測定した。次いで、この画像形成装置を温度50℃、相対湿度90%の環境下で7日間放置後にべた印字画像を印字して、べた印字画画像の印字濃度を放置後印字濃度として測定した。初期印字濃度と放置後印字濃度との印字濃度差(初期印字濃度-放置後印字濃度)を算出した。評価は、測定された印字濃度差が0.1以下であった場合を「◎」、測定された印字濃度差が0.1を超え0.2以下であった場合を「○」、測定された印字濃度差が0.2を超え0.3以下であった場合を「○×」、測定された印字濃度差が0.3以上であった場合を「×」とした。なお、導電性ローラから弾性層に由来するシリコーンオリゴマー等の低分子成分がブリードアウトすると印字濃度差が大きくなり、この印字濃度差の評価が「○×」以上であると低分子成分のブリードアウト量は十分に許容できる範囲となる。その結果を第1表に示す。
2 軸体
3 弾性層
4 ウレタンコート層
5 粒子状のアミノ樹脂
6 転写搬送ベルト
10 画像形成装置
11B、11C、11M、11Y 像担持体
12B、12C、12M、12Y 帯電手段
13B、13C、13M、13Y 露光手段
14B、14C、14M、14Y 転写手段
15B、15C、15M、15Y クリーニング手段
16 記録体
20 現像装置
21B、21C、21M、21Y、34 筐体
22B、22C、22M、22Y 現像剤
23B、23C、23M、23Y 現像剤担持体
24B、24C、24M、24Y 現像剤規制部材
30 定着手段
31 定着ローラ
32 加圧ローラ
33 無端ベルト支持ローラ
35 開口部
36 無端ベルト
41 カセット
42 支持ローラ
B、C、M、Y 現像ユニット
Claims (7)
- 弾性層の外周面に形成され、ウレタン樹脂と粒子状のアミノ樹脂とを含有するウレタンコート層を備えて成ることを特徴とする導電性ローラ。
- 前記アミノ樹脂は、グアナミン樹脂、ユリア樹脂、メラミン樹脂及びアニリン樹脂からなる群より選択される少なくとも1種を含むことを特徴とする請求項1に記載の導電性ローラ。
- 前記アミノ樹脂は、グアナミン樹脂を含むことを特徴とする請求項2に記載の導電性ローラ。
- 前記グアナミン樹脂は、ベンゾグアナミン樹脂を含むことを特徴とする請求項3に記載の導電性ローラ。
- 前記アミノ樹脂は、前記ウレタン樹脂100質量部に対して10~70質量部の割合で含有されていることを特徴とする請求項1~4のいずれか1項に記載の導電性ローラ。
- 請求項1~5のいずれか1項に記載の導電性ローラを備えた現像装置。
- 請求項1~5のいずれか1項に記載の導電性ローラを備えた画像形成装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020137024206A KR20140022810A (ko) | 2011-03-03 | 2012-01-19 | 도전성 롤러, 현상 장치 및 화상 형성 장치 |
CN201280010349.2A CN103392153B (zh) | 2011-03-03 | 2012-01-19 | 导电性辊、显影装置以及图像形成装置 |
US14/002,911 US20130343789A1 (en) | 2011-03-03 | 2012-01-19 | Electrically Conductive Roller, Development Apparatus, and Image-Forming Device |
JP2013502164A JP5931846B2 (ja) | 2011-03-03 | 2012-01-19 | 導電性ローラ、現像装置及び画像形成装置 |
EP12752554.1A EP2682821B1 (en) | 2011-03-03 | 2012-01-19 | Conductive roller, developing device, and image forming device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-046695 | 2011-03-03 | ||
JP2011046695 | 2011-03-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012117659A1 true WO2012117659A1 (ja) | 2012-09-07 |
Family
ID=46757606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/000304 WO2012117659A1 (ja) | 2011-03-03 | 2012-01-19 | 導電性ローラ、現像装置及び画像形成装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20130343789A1 (ja) |
EP (1) | EP2682821B1 (ja) |
JP (1) | JP5931846B2 (ja) |
KR (1) | KR20140022810A (ja) |
CN (1) | CN103392153B (ja) |
MY (1) | MY160011A (ja) |
WO (1) | WO2012117659A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016070996A (ja) * | 2014-09-26 | 2016-05-09 | 信越ポリマー株式会社 | 導電性ローラ、現像装置及び画像形成装置 |
JP2020086241A (ja) * | 2018-11-28 | 2020-06-04 | 株式会社ブリヂストン | 現像ローラ、および、画像形成装置 |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101795994B1 (ko) | 2014-06-20 | 2017-12-01 | 벨로3디, 인크. | 3차원 프린팅 장치, 시스템 및 방법 |
EP3370948A4 (en) | 2015-11-06 | 2019-07-24 | Velo3d Inc. | PROFESSIONAL THREE-DIMENSIONAL PRINTING |
US10183330B2 (en) | 2015-12-10 | 2019-01-22 | Vel03D, Inc. | Skillful three-dimensional printing |
EP3413137B1 (en) * | 2016-02-01 | 2021-07-14 | Bridgestone Corporation | Conductive roller, and production method therefor |
US9919360B2 (en) | 2016-02-18 | 2018-03-20 | Velo3D, Inc. | Accurate three-dimensional printing |
JP2017173732A (ja) * | 2016-03-25 | 2017-09-28 | 富士ゼロックス株式会社 | 導電性部材、帯電装置、プロセスカートリッジ、及び画像形成装置 |
EP3263316B1 (en) | 2016-06-29 | 2019-02-13 | VELO3D, Inc. | Three-dimensional printing and three-dimensional printers |
US11691343B2 (en) | 2016-06-29 | 2023-07-04 | Velo3D, Inc. | Three-dimensional printing and three-dimensional printers |
US10661341B2 (en) | 2016-11-07 | 2020-05-26 | Velo3D, Inc. | Gas flow in three-dimensional printing |
WO2018129089A1 (en) | 2017-01-05 | 2018-07-12 | Velo3D, Inc. | Optics in three-dimensional printing |
US20180250771A1 (en) | 2017-03-02 | 2018-09-06 | Velo3D, Inc. | Three-dimensional printing of three-dimensional objects |
US20180281283A1 (en) | 2017-03-28 | 2018-10-04 | Velo3D, Inc. | Material manipulation in three-dimensional printing |
US10272525B1 (en) | 2017-12-27 | 2019-04-30 | Velo3D, Inc. | Three-dimensional printing systems and methods of their use |
US10144176B1 (en) | 2018-01-15 | 2018-12-04 | Velo3D, Inc. | Three-dimensional printing systems and methods of their use |
CN110137701A (zh) * | 2018-02-09 | 2019-08-16 | 矢崎总业株式会社 | 装接有端子的电线、装接有端子的电线的制造方法和线束 |
CN114340876A (zh) | 2019-07-26 | 2022-04-12 | 维勒3D股份有限公司 | 三维物体形成的质量保证 |
US11298768B2 (en) * | 2019-11-15 | 2022-04-12 | Rolls-Royce Corporation | Method of preparing a surface for diffusion bonding and method of diffusion bonding |
US11420279B2 (en) | 2019-11-15 | 2022-08-23 | Rolls-Royce Corporation | Method of selectively bonding braze powders to a surface |
US11571762B2 (en) | 2019-11-15 | 2023-02-07 | Rolls-Royce North American Technologies Inc. | Printing method to selectively deposit braze powders at one or more predetermined locations on a surface |
US11565336B2 (en) | 2019-11-15 | 2023-01-31 | Rolls-Royce North American Technologies Inc. | Method of selectively bonding braze powders to a surface |
CN111487851A (zh) * | 2020-06-12 | 2020-08-04 | 珠海市春谷科技有限公司 | 适用于单组分非磁性碳粉跳动式显影的显影辊及其制造方法 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08286470A (ja) | 1995-04-18 | 1996-11-01 | Bridgestone Corp | 導電部材及びこれを用いた電子写真装置 |
JP2002023479A (ja) * | 2000-07-05 | 2002-01-23 | Canon Inc | 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 |
JP2004191561A (ja) * | 2002-12-10 | 2004-07-08 | Bridgestone Corp | 現像ローラ及び画像形成装置 |
JP2006088015A (ja) * | 2004-09-22 | 2006-04-06 | Bridgestone Corp | 導電性ローラの製造方法およびこの方法により製造された導電性ローラ |
JP2006163042A (ja) | 2004-12-08 | 2006-06-22 | Canon Inc | 半導電性ローラ、プロセスカートリッジおよび電子写真装置 |
JP3805563B2 (ja) | 1998-08-21 | 2006-08-02 | 株式会社リコー | 現像ローラ、その製造方法、それを用いた画像形成装置及びそれに用いる現像ユニット、プロセスユニット |
JP2008058622A (ja) | 2006-08-31 | 2008-03-13 | Shin Etsu Polymer Co Ltd | 導電性ローラ及び画像形成装置 |
JP4240119B2 (ja) | 2006-12-22 | 2009-03-18 | 東海ゴム工業株式会社 | 現像ロール |
JP2009237463A (ja) * | 2008-03-28 | 2009-10-15 | Konica Minolta Business Technologies Inc | 現像ローラ |
JP2010113177A (ja) * | 2008-11-07 | 2010-05-20 | Fuji Xerox Co Ltd | 導電性ロール、帯電装置、導電性ロールを備えたプロセスカートリッジ及び画像形成装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001132730A (ja) * | 1999-11-01 | 2001-05-18 | Shin Etsu Polymer Co Ltd | 半導電性ロール及び画像形成装置 |
JP2001140854A (ja) * | 1999-11-18 | 2001-05-22 | Shin Etsu Polymer Co Ltd | 半導電性ロール及び画像形成装置 |
US20070197362A1 (en) * | 2006-02-02 | 2007-08-23 | Bridgestone Corporation | Conductive elastic roller and image forming apparatus comprising the same |
JP5030605B2 (ja) * | 2006-02-02 | 2012-09-19 | 株式会社ブリヂストン | 導電性弾性ローラ及びそれを備えた画像形成装置 |
JP4666051B2 (ja) * | 2008-10-24 | 2011-04-06 | 富士ゼロックス株式会社 | 帯電部材、帯電装置、プロセスカートリッジおよび画像形成装置 |
-
2012
- 2012-01-19 KR KR1020137024206A patent/KR20140022810A/ko not_active Application Discontinuation
- 2012-01-19 EP EP12752554.1A patent/EP2682821B1/en active Active
- 2012-01-19 US US14/002,911 patent/US20130343789A1/en not_active Abandoned
- 2012-01-19 JP JP2013502164A patent/JP5931846B2/ja active Active
- 2012-01-19 MY MYPI2013701544A patent/MY160011A/en unknown
- 2012-01-19 WO PCT/JP2012/000304 patent/WO2012117659A1/ja active Application Filing
- 2012-01-19 CN CN201280010349.2A patent/CN103392153B/zh active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08286470A (ja) | 1995-04-18 | 1996-11-01 | Bridgestone Corp | 導電部材及びこれを用いた電子写真装置 |
JP3805563B2 (ja) | 1998-08-21 | 2006-08-02 | 株式会社リコー | 現像ローラ、その製造方法、それを用いた画像形成装置及びそれに用いる現像ユニット、プロセスユニット |
JP2002023479A (ja) * | 2000-07-05 | 2002-01-23 | Canon Inc | 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 |
JP2004191561A (ja) * | 2002-12-10 | 2004-07-08 | Bridgestone Corp | 現像ローラ及び画像形成装置 |
JP2006088015A (ja) * | 2004-09-22 | 2006-04-06 | Bridgestone Corp | 導電性ローラの製造方法およびこの方法により製造された導電性ローラ |
JP2006163042A (ja) | 2004-12-08 | 2006-06-22 | Canon Inc | 半導電性ローラ、プロセスカートリッジおよび電子写真装置 |
JP2008058622A (ja) | 2006-08-31 | 2008-03-13 | Shin Etsu Polymer Co Ltd | 導電性ローラ及び画像形成装置 |
JP4240119B2 (ja) | 2006-12-22 | 2009-03-18 | 東海ゴム工業株式会社 | 現像ロール |
JP2009237463A (ja) * | 2008-03-28 | 2009-10-15 | Konica Minolta Business Technologies Inc | 現像ローラ |
JP2010113177A (ja) * | 2008-11-07 | 2010-05-20 | Fuji Xerox Co Ltd | 導電性ロール、帯電装置、導電性ロールを備えたプロセスカートリッジ及び画像形成装置 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016070996A (ja) * | 2014-09-26 | 2016-05-09 | 信越ポリマー株式会社 | 導電性ローラ、現像装置及び画像形成装置 |
JP2020086241A (ja) * | 2018-11-28 | 2020-06-04 | 株式会社ブリヂストン | 現像ローラ、および、画像形成装置 |
WO2020110460A1 (ja) * | 2018-11-28 | 2020-06-04 | 株式会社ブリヂストン | 現像ローラ、および、画像形成装置 |
JP7188993B2 (ja) | 2018-11-28 | 2022-12-13 | 株式会社アーケム | 現像ローラ、および、画像形成装置 |
Also Published As
Publication number | Publication date |
---|---|
EP2682821B1 (en) | 2016-06-29 |
CN103392153B (zh) | 2016-12-14 |
CN103392153A (zh) | 2013-11-13 |
MY160011A (en) | 2017-02-15 |
KR20140022810A (ko) | 2014-02-25 |
EP2682821A4 (en) | 2014-08-27 |
JPWO2012117659A1 (ja) | 2014-07-07 |
EP2682821A1 (en) | 2014-01-08 |
US20130343789A1 (en) | 2013-12-26 |
JP5931846B2 (ja) | 2016-06-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2012117659A1 (ja) | 導電性ローラ、現像装置及び画像形成装置 | |
US7797833B2 (en) | Developing roller and method of producing the roller, process cartridge, and electrophotographic image-forming apparatus | |
JP5548544B2 (ja) | 導電性ローラ、現像装置及び画像形成装置 | |
US9031478B2 (en) | Developing roller including a roughened outermost surface, and developing device and image forming apparatus including the same | |
JP5593161B2 (ja) | 現像ローラ、現像装置及び画像形成装置 | |
US10831127B2 (en) | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus | |
JP5326002B2 (ja) | 電子写真機器用現像ロール | |
JP5435711B2 (ja) | 現像ローラ及び画像形成装置 | |
JP5464712B2 (ja) | 導電性ローラ、現像装置及び画像形成装置 | |
JP2011137914A (ja) | 導電性ローラ及び現像装置 | |
WO1999034123A1 (fr) | Rouleau eponge et procede de fabrication | |
JP2016070996A (ja) | 導電性ローラ、現像装置及び画像形成装置 | |
JP5729866B2 (ja) | 導電性ローラ、現像装置及び画像形成装置 | |
JP4250568B2 (ja) | 現像ローラ、プロセスカートリッジ及び電子写真画像形成装置 | |
JP2019095656A (ja) | 現像ローラ、該現像ローラの製造方法、現像装置及び画像形成装置 | |
JP5577207B2 (ja) | 導電性ローラ、その製造方法、現像装置及び画像形成装置 | |
JP2007108320A (ja) | 現像ローラ及びその製造方法、プロセスカートリッジおよび画像形成装置 | |
JP2007163860A (ja) | 現像ローラ、その製造方法、プロセスカートリッジ及び電子写真装置 | |
JP6484483B2 (ja) | 現像ローラ、現像装置及び画像形成装置 | |
JP2021189235A (ja) | 現像ローラ及び画像形成装置 | |
JP5989581B2 (ja) | 弾性ローラ、現像装置及び画像形成装置 | |
JP5768401B2 (ja) | 導電性部材、帯電装置、プロセスカートリッジおよび画像形成装置 | |
JP5409054B2 (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 |
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: 12752554 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2013502164 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14002911 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20137024206 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012752554 Country of ref document: EP |