WO2010021403A1 - 帯電ローラ - Google Patents
帯電ローラ Download PDFInfo
- Publication number
- WO2010021403A1 WO2010021403A1 PCT/JP2009/064742 JP2009064742W WO2010021403A1 WO 2010021403 A1 WO2010021403 A1 WO 2010021403A1 JP 2009064742 W JP2009064742 W JP 2009064742W WO 2010021403 A1 WO2010021403 A1 WO 2010021403A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- elastic layer
- roller
- resin
- charging roller
- layer
- Prior art date
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Classifications
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
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- 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
Definitions
- the present invention relates to a charging roller (hereinafter, also simply referred to as “roller”), and more particularly to a charging roller that can be used in a contact-type charging method, can be more easily manufactured, and can prevent problems caused by a conductive agent.
- a charging roller hereinafter, also simply referred to as “roller”
- 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.
- Patent Document 1 discloses a charging roller having a resistance adjustment layer and a skin layer made of urethane resin or the like on the surface of an elastic layer made of a foam layer.
- Patent Document 2 discloses a foam roller obtained by applying an ultraviolet curable resin to the surface of a foam layer or an elastic layer composed of a foam layer and a skin layer.
- Patent Document 3 discloses a conductive roller having a non-foamed rubber elastic layer and a surface layer made of polysiloxane.
- Patent Document 4 discloses a conductive roller having an elastic layer made of an elastomer and a resin coating layer containing an ultraviolet curable resin.
- Patent Document 5 discloses a developing roller in which a resin layer made of an ultraviolet curable resin is provided on a conductive shaft made of resin.
- Patent Document 6 discloses a method of applying an ultraviolet curable resin with a die coater.
- Patent Documents 1 to 4 since the elastic layer is formed of foamed rubber or non-foamed rubber, the process includes a mold assembling process, a preheating process, a casting process, a heating curing process, A cooling process and a solid layer (resistance adjustment layer etc.) production process are required.
- paragraph [0015] of Patent Document 2 discloses an in-mold foaming method using two-component rubber as a method for forming an elastic layer using foamed rubber
- paragraphs [0012] to [0014] of Patent Document 3 disclose the method.
- Patent Documents 1 to 4 Discloses a method of forming an elastic layer of non-foamed rubber by injection molding a rubber tube and inserting a cored bar, and a method of forming a rubber layer on the cored bar by extrusion and polishing with a rotating grindstone. For this reason, the methods described in Patent Documents 1 to 4 require dedicated equipment and a long curing time in order to form the elastic layer, and improvement thereof is desired.
- Patent Document 5 forms an elastic layer by a method in which an ultraviolet curable resin is provided as a resin layer on a hollow cylindrical body, but has a problem in that the diameter becomes too large because it is hollow.
- an object of the present invention is to provide a charging roller that can solve the above-described problems and can be used in a contact charging method, can be more easily manufactured, and can prevent problems caused by a conductive agent.
- the present inventors use an ultraviolet curable resin as an elastic layer, and further laminate a compound not containing an ultraviolet curable resin on the elastic layer, It has been found that a charging roller that can be used in a contact charging method, can be produced more easily, and can further prevent problems caused by a conductive agent, and the present invention has been completed.
- the charging roller of the present invention is a charging roller comprising a shaft, an elastic layer formed on the outer periphery of the shaft, and a surface layer formed on the outer peripheral surface of the elastic layer.
- the elastic layer is formed of an ultraviolet curable resin;
- the surface layer is formed of a thermosetting resin.
- the elastic layer preferably has a thickness of 0.9 to 1.3 mm, and the shaft is preferably a metal hollow cylinder or solid cylinder.
- a charging roller that can be used in a contact-type charging method, can be manufactured more easily, and can prevent problems caused by a conductive agent.
- FIG. 1 is a diagram illustrating an example of a charging roller according to a preferred embodiment of the present invention.
- the charging roller 10 of the present invention includes a shaft 1, an elastic layer 2 formed on the outer periphery of the shaft 1, and a surface layer 3 formed on the outer peripheral surface of the elastic layer 2.
- the elastic layer 2 is formed of an ultraviolet curable resin and the surface layer 3 is formed of a thermosetting resin.
- the ultraviolet curable resin By providing the ultraviolet curable resin with the elasticity required for the charging roller, the charging roller can be formed without providing an elastic layer of conventional rubber.
- an ultraviolet curable resin when carbon black is blended as a conductive agent, the carbon black is black and thus absorbs ultraviolet rays, which may cause insufficient curing.
- a thermosetting resin for the surface layer curing can be sufficiently performed regardless of the type of the conductive agent.
- the ultraviolet curable resin is not limited as long as the desired effect of the present invention is obtained, but the following (1) to (4), (1) Good adhesion to the shaft 1 (2) Volume resistivity of 10 6 to 10 8 ⁇ ⁇ cm (3) It is preferably an ultraviolet curable resin having flexibility and high breaking strength, and (4) no low molecular conductive agent bleeding out. Thereby, it is possible to have both characteristics of the foam elastic layer and the solid skin layer in the conventional charging roller.
- the ultraviolet curable resin examples include polyester resin, polyether resin, fluororesin, epoxy resin, amino resin, polyamide resin, acrylic resin, acrylic urethane resin, urethane resin, alkyd resin, phenol resin, melamine resin, urea resin, silicone Resins, polyvinyl butyral resins, vinyl ether resins, vinyl ester resins, and modified resins in which specific functional groups are introduced into these resins can be used. These resins can be used alone or in combination of two or more. Also good.
- the compound can contain a reactive diluent as necessary.
- the compound preferably contains a photopolymerization initiator and a photopolymerization accelerator. In addition, you may contain a well-known additive as needed.
- Such an ultraviolet curable resin is particularly preferably a urethane acrylate ultraviolet curable resin composition containing an oligomer having a urethane skeleton and an ultraviolet polymerization initiator.
- any suitable conductive agent that can be added to the ultraviolet curable resin of the elastic layer 2 can be used.
- the carbon-based conductive agent ketjen black or acetylene black is used as rubber carbon black.
- carbon black for ink such as oxidized carbon black, pyrolytic carbon black, graphite and the like can also be used.
- a polymer ionic conductive agent can be added as a conductive agent.
- a polymer ionic conductive agent examples are described in JP-A-9-227717, JP-A-10-120924 and JP-A-2000-327922. However, it is not particularly limited.
- component (A) comprises: Polyacrylic acid ester, polymethacrylic acid ester, polyacrylonitrile, polyvinyl alcohol, polyvinyl acetate, polyamide, polyurethane or polyester, component (B) is oligoethoxylated acrylate or methacrylate, oligoethoxylated styrene for aromatic ring , Polyether urethane, polyether urea, polyether amide, polyether ester amide or polyether ester, and component (C) is an inorganic or low molecular weight organic protonic acid alkali metal, alkaline earth metal, zinc or An ammonium salt, preferably, LiClo 4, LiCF 3 SO 3 , NaClo 4, LiBF 4, NaBF 4, KBF 4, NaCF 4 SO 3,
- the method for forming the elastic layer 2 is not particularly limited.
- a coating solution in which the ultraviolet curable resin component and the conductive agent are dispersed or dissolved is prepared.
- a method of coating on the shaft 1 by drying, solidifying by the dipping method, spray method, roll coater method, die coating method or the like is adopted, and the dipping method is particularly preferably used.
- the elastic layer 2 preferably has a thickness of 0.9 to 1.3 mm.
- the thickness of the elastic layer 2 is less than 0.9 mm, spark discharge may occur from the cored bar (shaft) to the photoreceptor, particularly in a high temperature and low humidity region represented by Central America and the like, which is not preferable.
- the thickness of the elastic layer 2 exceeds 1.3 mm, it is not preferable because it is extremely difficult to control the outer diameter at the time of dipping coating, and a left-right difference is likely to occur.
- the shaft 1 is made of metal or plastic, and can be a hollow cylinder or a solid cylinder, and is preferably a metal hollow cylinder or a solid cylinder. More preferably, it is a metal hollow cylinder. As a result, the cost can be further reduced.
- thermosetting resin for forming the surface layer 3 known rubbers and resins used for forming the surface layer of the charging member can be used, and are not particularly limited.
- An acrylic resin, a polyurethane resin, an acrylic resin, a polyamide resin, a fluororesin and the like are exemplified, and one or two or more of these can be used in combination.
- a fluororesin is preferably used from the viewpoint that toner adhesion resistance on the surface of the charging roller can be imparted.
- fluororesin examples include polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-ethylene copolymer, polychlorotrifluoroethylene, chlorotrifluoroethylene-ethylene copolymer. And tetrafluoroethylene-vinylidene fluoride copolymer, polyvinylidene fluoride, polyvinyl fluoride and the like.
- the resin forming the surface layer 3 is not particularly limited, but the conductivity (electric resistance) of the surface layer can be imparted or adjusted by adding a conductive agent.
- the conductive agent is not particularly limited, and various electronic conductive agents and various ionic conductive agents can be used. In the present invention, it is particularly preferable to use carbon.
- the addition amount of the conductive agent can be appropriately adjusted so that a desired resistance is obtained.
- the volume resistivity of the surface layer 3 is preferably 1 ⁇ 10 4 to 1 ⁇ 10 12 ⁇ ⁇ cm, and more preferably 1 ⁇ 10 6 to 1 ⁇ 10 8 ⁇ ⁇ cm.
- the addition amount of the conductive agent can be adjusted so as to achieve, and the addition amount when carbon is used as the conductive agent is usually about 1 to 100 phr, particularly about 10 to 70 phr with respect to the base resin.
- additives such as a crosslinking agent, a thickener, a thixotropy imparting agent, and a structural viscosity imparting agent can be added to the resin composition forming the surface layer 3 as necessary.
- the method for forming the surface layer 3 is not particularly limited. Usually, a coating solution in which the resin component and the conductive agent are dispersed or dissolved is prepared, and the coating solution is dipped, sprayed, roll coater, etc. The method of heat-curing after applying by is common. In addition, what is necessary is just to select suitably as a solvent for preparing the said coating solution according to the kind etc. of base resin which comprises a resin composition, for example, when using a fluororesin as base resin, methyl ethyl ketone ( MEK), methyl isobutyl ketone (MIBK), toluene, xylene and the like are preferably used.
- MEK methyl ethyl ketone
- MIBK methyl isobutyl ketone
- the thickness of the surface layer 3 is set according to the form of the charging roller 10 and the like, and is not particularly limited, but is usually 1 to 30 ⁇ m, particularly 1 to 20 ⁇ m, and if it is less than 1 ⁇ m, In some cases, the durability of the roller is inferior. On the other hand, if it exceeds 20 ⁇ m, good surface properties may not be obtained, such as adversely affecting the charging characteristics or causing wrinkles on the surface.
- FIG. 2 is a view showing another example of the charging roller according to the preferred embodiment of the present invention. Since it is important to form a uniform contact surface in the length direction when pressed against the photosensitive drum, the charging roller 20 has a crown shape whose central portion in the length direction has a larger diameter than the end portion. .
- the crown amount representing the degree of the projection is preferably 50 to 300 ⁇ m. It can be made good. When the crown amount is less than 50 ⁇ m, the contact pressure at the central portion in the roller length direction is low. On the other hand, when the crown amount is greater than 300 ⁇ m, the central portion in the roller length direction is too strong. In either case, the charge amount may be non-uniform.
- the crown amount of the charging roller in the present invention was 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 the 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 each position of 90 mm in the direction of both ends is calculated.
- the charging rollers 10 and 20 preferably have a deflection (film thickness accuracy) of 70 ⁇ m or less in the entire region in the roller length direction.
- a deflection (film thickness accuracy) of 70 ⁇ m or less in the entire region in the roller length direction.
- the charging rollers 10 and 20 and the photoconductor are rotating while being in contact with each other, when the shake of the charging rollers 10 and 20 is large, a gap is generated between the charging rollers 10 and 20 and the photoconductor. Furthermore, the gap distance also varies. In this case, the toner particles and the external additive remaining on the photosensitive member are liable to enter the gap and adhere to the charging rollers 10 and 20 as unevenness. Therefore, the surface of the roller becomes mottled and causes image defects.
- the deflection of the charging rollers 10 and 20 was measured using a high precision laser measuring machine LSM-430v manufactured by Mitutoyo Corporation. With this measuring machine, the outer diameter was 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 was taken as the shake.
- the elastic layer 2 is formed by applying a paint containing an ultraviolet curable resin to the shaft 1 and irradiating with ultraviolet rays (UV). Next, a coating solution of the surface layer 3 is applied on the elastic layer 2 and then thermally cured.
- the curing temperature can be about 105 ° C. or higher as the temperature higher than the boiling point of the solvent.
- the ultraviolet ray (UV) irradiation amount and the integrated light amount for curing the ultraviolet curable resin are not limited as long as the ultraviolet curable resin can be sufficiently cured.
- the UV irradiation intensity is 100 to 700 W / cm. 2 is applied so that the integrated light quantity is 200 to 3000 mJ / cm 2 .
- Example 1 On the surface of a hollow cylindrical metal shaft member 1 (material: aluminum A6063, length: 230 mm, thickness 0.7 mm, outer diameter ⁇ 18 mm), a coating liquid having the formulation shown in Table 1 below was applied with a die coater. Then, irradiation was performed at a UV irradiation intensity of 1500 W / cm 2 for 5 seconds to obtain an elastic layer made of an ultraviolet curable resin having a thickness shown in Table 1 below. The film thickness (mm) and volume resistivity ( ⁇ ⁇ cm) of the elastic layer made of the obtained ultraviolet curable resin were measured.
- ⁇ Measurement of volume resistivity> At a temperature of 23 ° C. and a relative humidity of 50%, a volume resistivity ( ⁇ ⁇ cm) at a measurement voltage of 250 V was measured using a Hirester UP (manufactured by Mitsubishi Chemical Corporation) connected to a UR probe as a measuring device. .
- tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer as the base resin for surface layer 3
- carbon as the conductive agent
- PE powder trade name: SL3505, manufactured by Elementis
- the charging roller shown in FIG. 1 was obtained.
- the charging rollers of Examples 1 to 4 had a good volume resistivity, and there were no problems such as bleeding out of the conductive agent.
- the charging roller of Examples 1 to 4 has an elastic layer formed of an ultraviolet curable resin, it could be manufactured at a lower cost and more easily than a charging roller using a conventional rubber or the like as the elastic layer. .
- Example 5 a charging roller was produced in the same manner as in Example 1 except that the thickness of the elastic layer was changed as shown in Table 2 below.
- the outer diameter left-right difference measurement and image evaluation were performed according to the following. The results are also shown in Table 2 below.
- ⁇ Evaluation of image> The obtained charging roller was incorporated into a printer Laser jet CP1210 manufactured by HP, and an image was evaluated based on uniformity of toner density.
- the evaluation criteria for image evaluation are as follows. ⁇ Evaluation criteria> ⁇ : There is no density unevenness over the entire image, and it is uniform. (Triangle
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Abstract
Description
前記弾性層が、紫外線硬化型樹脂で形成され、
前記表層が、熱硬化型樹脂で形成されてなることを特徴とするものである。
図1は、本発明の好適実施形態に係る帯電ローラの一例を示す図である。本発明の帯電ローラ10は、シャフト1と、該シャフト1の外周に形成された弾性層2と、該弾性層2の外周面に形成された表層3と、を備えるものである。
(1)シャフト1に対する密着性がよい
(2)体積固有抵抗が106~108Ω・cm
(3)柔軟性があり、破断強度が大きい
(4)低分子導電剤のブリードアウトがない
の特性をもつ紫外線硬化型樹脂であることが好ましい。これにより、従来の帯電ローラにおける発泡体弾性層とソリッドスキン層の両方の特性を併せ持つことができる。
クラウン量(μm)={B-(A+C)/2}×1000 (1)
で求めることができる。
(実施例1~4)
中空円筒体状の金属シャフト部材1(材質:アルミA6063,長さ:230mm,厚み0.7mm,外径φ18mm)の表面に、下記表1に示す配合処方の塗工液をダイコータにて塗布し、UV照射強度1500W/cm2で5秒照射して、下記表1に示す厚さの紫外線硬化型樹脂からなる弾性層を得た。得られた紫外線硬化型樹脂からなる弾性層の膜厚(mm)および体積固有抵抗(Ω・cm)を測定した。
温度23℃、相対湿度50%にて、測定装置として、ハイレスターUP(三菱化学社製)にURプローブを接続したものを用いて、測定電圧250Vにおける体積固有抵抗(Ω・cm)を測定した。
※2)商品名:ウレタンオリゴマーB、第一工業製薬株式会社製
※3)商品名:ウレタンオリゴマーC、第一工業製薬株式会社製
※4)商品名:MTG-A、共栄社化学株式会社製
※5)商品名:14EG-A、新中村化学工業株式会社製
※6)商品名:ASA、新中村化学工業株式会社製
※7)商品名:DPM-A、共栄社化学株式会社製
※8)商品名:サンコノールMTG-A-50R、三光化学工業株式会社製
※9)商品名:IRGACURE184、チバ・スペシャルティ・ケミカルズ社製
次に、弾性層の厚みを下記表2中に示すように変えた以外は実施例1と同様にして、帯電ローラを作製した。得られた各帯電ローラについて、以下に従い外径左右差の測定および画像評価を行った。その結果を、下記の表2中に併せて示す。
ミツトヨ(株)製高精度レーザ測定機LSM-430vを用いて、ローラ中央部から端部へ向かう90mmの位置において外径を測定し、両端部方向へ各90mmの位置における外径の差を求めて、外径左右差(μm)とした。
得られた帯電ローラをHP社製プリンター Laser jet CP1210に組み込み、トナー濃度の均一性により、画像を評価した。画像評価の評価基準は、以下に示すとおりである。
<評価基準>
○:画像全面にわたって濃度のムラがなく、均一である。
△:画像の一部に黒抜けがあり、濃度ムラが一部認められる。
×:画像の大部分に黒抜けがあり、濃度ムラが多く認められる。
2 弾性層
3 表層
10,20 帯電ローラ
Claims (3)
- シャフトと、該シャフトの外周に形成された弾性層と、該弾性層の外周面に形成された表層と、を備える帯電ローラにおいて、
前記弾性層が、紫外線硬化型樹脂で形成され、
前記表層が、熱硬化型樹脂で形成されてなることを特徴とする帯電ローラ。 - 前記弾性層の厚みが、0.9~1.3mmである請求項1記載の帯電ローラ。
- 前記シャフトが、金属製の中空円筒体または中実円柱体である請求項1記載の帯電ローラ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801328608A CN102132222A (zh) | 2008-08-22 | 2009-08-24 | 带电辊 |
JP2010525729A JP5209055B2 (ja) | 2008-08-22 | 2009-08-24 | 帯電ローラ |
US13/059,853 US8711543B2 (en) | 2008-08-22 | 2009-08-24 | Electrifying roller |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008214683 | 2008-08-22 | ||
JP2008-214683 | 2008-08-22 |
Publications (1)
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WO2010021403A1 true WO2010021403A1 (ja) | 2010-02-25 |
Family
ID=41707276
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PCT/JP2009/064742 WO2010021403A1 (ja) | 2008-08-22 | 2009-08-24 | 帯電ローラ |
Country Status (5)
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US (1) | US8711543B2 (ja) |
JP (1) | JP5209055B2 (ja) |
KR (1) | KR20110050687A (ja) |
CN (1) | CN102132222A (ja) |
WO (1) | WO2010021403A1 (ja) |
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KR101070330B1 (ko) * | 2010-05-06 | 2011-10-06 | 자화전자 주식회사 | 화상형성장치용 현상기의 롤러 |
WO2016031145A1 (ja) * | 2014-08-29 | 2016-03-03 | 株式会社ブリヂストン | 導電性部材、導電性ローラ、及び画像形成装置 |
JP2020002291A (ja) * | 2018-06-29 | 2020-01-09 | オーウエル株式会社 | 光硬化性組成物 |
Families Citing this family (1)
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US11644761B2 (en) | 2021-06-02 | 2023-05-09 | Canon Kabushiki Kaisha | Electrophotographic roller, process cartridge and electrophotographic image forming apparatus |
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- 2009-08-24 KR KR1020117006403A patent/KR20110050687A/ko not_active Application Discontinuation
- 2009-08-24 US US13/059,853 patent/US8711543B2/en not_active Expired - Fee Related
- 2009-08-24 CN CN2009801328608A patent/CN102132222A/zh active Pending
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KR101070330B1 (ko) * | 2010-05-06 | 2011-10-06 | 자화전자 주식회사 | 화상형성장치용 현상기의 롤러 |
WO2016031145A1 (ja) * | 2014-08-29 | 2016-03-03 | 株式会社ブリヂストン | 導電性部材、導電性ローラ、及び画像形成装置 |
JP2016051054A (ja) * | 2014-08-29 | 2016-04-11 | 株式会社ブリヂストン | 導電性部材、導電性ローラ、及び画像形成装置 |
US10466610B2 (en) | 2014-08-29 | 2019-11-05 | Bridgestone Corporation | Conductive member, conductive roller and image forming device |
JP2020002291A (ja) * | 2018-06-29 | 2020-01-09 | オーウエル株式会社 | 光硬化性組成物 |
JP7072452B2 (ja) | 2018-06-29 | 2022-05-20 | オーウエル株式会社 | 光硬化性組成物 |
Also Published As
Publication number | Publication date |
---|---|
CN102132222A (zh) | 2011-07-20 |
JPWO2010021403A1 (ja) | 2012-01-26 |
US20110249372A1 (en) | 2011-10-13 |
JP5209055B2 (ja) | 2013-06-12 |
US8711543B2 (en) | 2014-04-29 |
KR20110050687A (ko) | 2011-05-16 |
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