JP2009086010A - Method of manufacturing conductive roller, and conductive roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a conductive roller capable of preventing paint from flowing into a cylindrical base body end part when application-forming an elastic layer, and the conductive roller capable of preventing an uneven film thickness from being generated in an elastic layer end part, and capable of preventing a foreign matter from being deposited onto a roller end part. <P>SOLUTION: The method of manufacturing the conductive roller can provide the conductive roller with one layer of the elastic layer 1 on an outer circumferential face of a cylindrical base body having shaft parts 11 in both ends. The method uses, as the cylindrical base body 10, one having cutting margin 4 of outside diameter equal to the outer circumferential face at least in one end part, when forming the elastic layer 1 on the outer circumferential face of the cylindrical base body 10, and the cutting margin 4 and the elastic layer 1 on the cutting margin 4 are cut off to be removed, after the elastic layer 1 is application-formed up to the cutting margin 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a conductive roller and a conductive roller (hereinafter, also simply referred to as “manufacturing method” and “roller”), and more specifically, a method for manufacturing a conductive roller with an improved manufacturing process and a method obtained thereby. The present invention relates to a conductive 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. A roller member imparted with conductivity, such as a driving roller, is used.

  Such a conductive roller generally has a configuration in which an elastic layer is provided on the outer periphery of a cylindrical base body. Depending on the application, a flange formed with a shaft portion on both ends of a metal pipe is fitted. A structure in which an elastic layer is formed on the outer periphery, a structure in which a cylindrical base body is provided on the outer periphery of a shaft such as a metal core, and an elastic layer is formed on the outer periphery are known.

When the conductive roller having such a structure is manufactured, the elastic layer is coated and formed on the outer periphery of the cylindrical base body. As shown in FIG. 3, masking of the roller shaft portion 31 and the elastic layer forming portion at the end portion are performed. For the purpose of preventing uneven coating, coating is performed on both ends of the cylindrical base body 20 using a coating cap 30 that covers the shaft portion 31 (see, for example, Patent Documents 1 to 3). By using the coating cap 30, the elastic layer 21 can be applied evenly to the end portion, and adhesion of the coating liquid to the shaft portion 31 can be prevented. Then, a desired roller is obtained by cutting the elastic layer 21 at the boundary between the elastic layer forming portion end and the coating cap 30. The cylindrical base body 20 in the figure has a structure in which a flange 23 having shaft portions 31 formed on both ends of a metal pipe 22 is fitted, and an elastic layer 21 is formed on the outer periphery thereof.
JP-A-7-225525 (Claims etc.) JP 2002-82523 A (Claims etc.) JP 2001-3928 A (Claims etc.)

  However, when the elastic layer is applied and formed using the coating cap as described above, the end of the cylindrical base body 20 (flange 23) and the coating are shown by an arrow in the enlarged view of FIG. When the elastic layer forming coating material flows into the gap between the contact portion with the cap 30 and the cutting residue 40 adheres to the end of the cylindrical substrate 20 after coating and cutting, as shown in FIG. was there. When such foreign matter such as cutting waste adheres, for example, in a developing roller, it may cause image defects when mounted on an actual machine, but the cutting waste is completely removed. Therefore, it has been required to establish a roller manufacturing technique that does not cause such a problem.

  Then, the objective of this invention is providing the manufacturing method of the electroconductive roller which can eliminate the adhesion of the coating material to the cylindrical base-material edge part at the time of application formation of an elastic layer, eliminating the said problem, An object of the present invention is to provide a conductive roller in which there is no film thickness unevenness at the end of the elastic layer and adhesion of foreign matter to the end of the roller.

  As a result of intensive studies, the present inventor has found that the above problem can be solved by providing a cutting margin that can be cut and removed at the end of the cylindrical substrate in advance when forming the elastic layer on the outer periphery of the cylindrical substrate. Thus, the present invention has been completed.

That is, the method for producing a conductive roller according to the present invention is a method for producing a conductive roller comprising at least one elastic layer on the outer peripheral surface of a cylindrical base body having shaft portions at both ends.
When forming the elastic layer on the outer peripheral surface of the cylindrical substrate, the cylindrical substrate having at least one end having a cutting margin having the same outer diameter as the outer peripheral surface is used to cut the elastic layer. After coating and forming to the margin, the cutting margin and the elastic layer on the cutting margin are cut and removed.

  In the present invention, the cutting margin is preferably provided in a hollow ring shape along the outer periphery of the end portion in the longitudinal direction of the cylindrical substrate. The length of the cutting margin is preferably 0.3 mm or more, and it is also preferable that the length of the cutting margin is 8 mm or more and that no coating cap is used when the elastic layer is formed. Furthermore, in the present invention, it is preferable that the cylindrical base body includes a metal pipe and a flange fitted to both ends of the metal pipe, and the cutting margin is provided on the flange. Furthermore, the flange is preferably made of a resin material.

  The conductive roller of the present invention is manufactured by the above-described method for manufacturing a conductive roller of the present invention.

  According to the present invention, the above configuration makes it possible to reliably prevent the coating material from adhering to the end portion of the cylindrical substrate during the coating formation of the elastic layer. It has become possible to realize a conductive roller manufacturing method and a conductive roller that can obtain a conductive roller that prevents uneven thickness and prevents foreign matter from adhering to the end of the roller.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The method for producing a conductive roller according to the present invention is a technique related to an improvement in producing a conductive roller having at least one elastic layer on the outer peripheral surface of a cylindrical base body having shaft portions at both ends.

  In the manufacturing method of the present invention, when the elastic layer is formed on the outer peripheral surface of the cylindrical base body, the cylindrical base body has a cutting edge 4 having the same outer diameter as the outer peripheral surface as shown in FIG. Use what has. This cutting margin 4 is a portion provided to protrude outward in the longitudinal direction from the end portion of the original elastic layer forming portion indicated by symbol A in the drawing, and the outer diameter thereof is the main body portion of the cylindrical base body 10, that is, The outer diameter of the elastic layer forming portion is the same. Such a cutting margin 4 is provided in advance on the cylindrical base 10, and the elastic layer is formed by coating up to the cutting margin 4, so that a cylinder as in the case of using a conventional coating cap is used. It is possible to prevent the cutting residue from adhering to the end of the substrate 10. Further, by providing the cutting margin 4, it is possible to prevent the occurrence of film thickness unevenness at the end of the elastic layer. Therefore, after that, as shown in FIG. 2, by cutting and removing the cutting margin 4 and the elastic layer 1 on the cutting margin 4 at a position indicated by the symbol A using the cutting member 50, elasticity without film thickness unevenness. It becomes possible to easily obtain a conductive roller having the layer 1 and having no cutting residue attached to the end of the cylindrical substrate 10.

  In the present invention, if the cutting margin 4 is provided at at least one of the roller end portions, the effect of the present invention can be obtained. Further, the shape of the cutting margin 4 is not particularly limited as long as the outer diameter is formed to be the same outer diameter as the outer peripheral surface of the cylindrical substrate 10, and may be provided in a solid shape. As shown in the drawing, it is preferable to provide a hollow annular shape along the outer periphery of the longitudinal end portion of the cylindrical substrate 10. This facilitates cutting and removal of the cutting margin. In addition, it is preferable that the thickness of the cutting margin 4 in the case of providing in this hollow annular shape shall be 0.1 mm or more. If the thickness of the cutting margin 4 is less than 0.1 mm, insufficient rigidity of the cutting margin or a poor shape formation may occur.

  The length of the cutting margin 4 is preferably 0.3 mm or more, and particularly preferably 0.3 mm or more and 2 mm or less. If the cutting margin 4 is not 0.3 mm or more, when the cutting margin 4 is cut and removed after the elastic layer is formed, the cutting instrument 50 interferes with the end of the cylindrical substrate 10 to damage the end. May cause defects. On the other hand, even if the cutting margin 4 is made too long, no further effect is obtained, and problems such as high costs arise.

  Here, the minimum dimension of the coating film thickness unevenness (coating of the coating) at the end of the elastic layer forming portion is about 8 mm. Therefore, when the cutting margin 4 is less than 8 mm, the influence of the film thickness unevenness at the elastic layer forming end portion is caused to be longer than the cutting margin 4 in the longitudinal direction, that is, the original elastic layer forming portion (from the end portion A). It may affect the inner part). Therefore, in the present invention, when the cutting margin 4 having a length in the range of 0.3 mm or more and less than 8 mm is provided, it is necessary to use the coating cap 30 as in the conventional case when forming the elastic layer coating ( (See FIG. 2). As shown in the figure, the coating cap 30 in this case has an outer diameter that is the same as the outer diameter of the cylindrical substrate 10 and an inner diameter that can be fitted onto the shaft portion 11. For example, a conventionally known one can be used and is not particularly limited. In this case, there is a possibility that the same paint soaking may occur between the cylindrical substrate 10 and the coating cap 30. In the present invention, however, the soaking part of the paint is removed by cutting. Since it is on the outer side in the longitudinal direction of the roller from the cutting part A, there is no problem due to this penetration.

  On the other hand, if the length of the cutting margin 4 is 8 mm or more, particularly 8 mm or more and 10 mm or less, the film thickness at the elastic layer forming end is not required even when the coating cap 30 is not used when forming the elastic layer. The effect of unevenness is not exerted on the elastic layer forming portion. Therefore, in this case, it is possible to manufacture a capless roller.

  In the production method of the present invention, it is only important to provide the above-mentioned cutting margin at the end of the cylindrical substrate 10, and other points can be appropriately carried out according to a conventional method and are particularly limited. is not. For example, in the present invention, as the cutting instrument 50, specifically, a blade, a laser, a polishing machine, or the like can be used. In addition, regarding the formation method of the elastic layer, in particular, even when using a die coating method in which an elastic layer is formed by discharging an elastic layer forming paint from between a pair of die heads, there is no problem due to cutting residue In this respect, the present invention has a great merit.

  In addition, the conductive roller of the present invention only needs to be manufactured by the above-described manufacturing method of the present invention, thereby preventing the occurrence of film thickness unevenness at the elastic layer end and adhesion of foreign matter to the roller end. It is something that can be done. About the concrete structure of the roller of this invention, it can comprise suitably according to a conventional method, and it does not restrict | limit in particular.

  The cylindrical base body in the roller of the present invention may be provided with a cylindrical base body portion and shaft portions protruding from both ends in the longitudinal direction as shown in the figure, and on the outer periphery of the cylindrical base body portion. A roller is formed by providing an elastic layer. Therefore, in the present invention, in addition to the cylindrical base 10 composed of the metal pipe 2 and the flanges 3 fitted to both ends as shown in the drawing, although not shown, it is attached to the outer periphery of a shaft such as a cored bar. A cylindrical substrate provided with a cylindrical substrate main body may be used. In the case of the former cylindrical base body 10, the end of the flange 3, that is, the outer peripheral portion in the illustrated example, can be extended to provide a cutting margin 4 having the same outer diameter as the outer peripheral surface. In the latter case, the end of the cylindrical base body may be extended to provide a cutting margin having the same outer diameter as the outer peripheral surface thereof.

  Of the above, the material of the metal pipe 2 used for the former cylindrical base 10 is not particularly limited as long as it is made of a metal material having good conductivity. For example, iron, stainless steel, Aluminum, an alloy containing these, or the like can be used. As long as the thickness of the metal pipe 2 is sufficient in strength, it is preferably thinner in terms of weight reduction, for example, 0.3 to 2 mm.

  As a material of the flange 3 constituting the cutting margin in this case, any material such as various metal materials or resin materials may be used depending on the use of the roller, but from the viewpoint of easy cutting. It is preferable to be made of a resin material. In particular, in the case of a flange, it is preferable to use a material having excellent strength in terms of the function of the driving force transmission unit, and specific examples include polyacetal (POM) and polyamide.

  Moreover, as a shaft in the latter case, for example, a material obtained by applying nickel, zinc plating or the like to sulfur free cutting steel, aluminum, stainless steel or the like can be used.

  As the material of the cylindrical base body constituting the cutting margin in this case, a material in which a conductive agent is dispersed in a resin is used. The resin material is not particularly limited as long as it has an appropriate strength and can be appropriately selected from general-purpose resins and engineering plastics. Specifically, as an engineering plastic, for example, polyacetal, polyamide resin (for example, polyamide 6, polyamide 6 · 6, polyamide 12, polyamide 4 · 6, polyamide 6 · 10, polyamide 6 · 12, polyamide 11, polyamide MXD6) (Polyxylene diamine and adipic acid)), polybutylene terephthalate, polyphenylene oxide, polyphenylene ether, polyphenylene sulfide, polyethersulfone, polycarbonate, polyimide, polyamideimide, polyetherimide, polysulfone, polyetheretherketone , Polyethylene terephthalate, polyarylate, liquid crystal polymer, polytetrafluoroethylene, and the like. Examples of the general-purpose resin include polypropylene, acrylonitrile-butadiene-styrene (ABS) resin, polystyrene, and polyethylene. In addition, a melamine resin, a phenol resin, a silicone resin, etc. can also be used. These may be used individually by 1 type and may be used in combination of 2 or more type.

  Among these, engineering plastics are particularly preferable, and polyacetal, polyamide resin, polybutylene terephthalate, polyphenylene ether, polyphenylene sulfide, polycarbonate, and the like are more preferable. This is because these materials are thermoplastic and have excellent moldability and excellent mechanical strength. More preferably, polyamide 6 · 6, polyamide MXD6, polyamide 6 · 12, polybutylene terephthalate, or a mixed resin thereof is used. It is possible to use a thermosetting resin, but considering recyclability, it is preferable to use a thermoplastic resin.

  As the conductive agent, various materials can be used as long as they can be uniformly dispersed in the resin material. Carbon black powder, graphite powder, carbon fiber, metal such as aluminum, copper, nickel, etc. Powdered conductive agents such as powder, metal oxide powders such as tin oxide, titanium oxide, and zinc oxide, and conductive glass powder are preferably used. These may be used individually by 1 type and may be used in combination of 2 or more type. What is necessary is just to select suitably the compounding quantity of this electrically conductive agent so that an appropriate resistance value may be obtained according to the use etc. of a roller, and it does not restrict | limit in particular. Usually, it is 5 to 40% by weight, preferably 5 to 20% by weight, based on the entire blended material.

  In addition, in the material of the cylindrical base body, various conductive or non-conductive fibrous materials, whiskers, ferrites, and the like can be blended as desired for the purpose of reinforcement or increase in weight. Examples of the fibrous material include fibers such as carbon fiber and glass fiber, and examples of the whisker include inorganic whiskers such as potassium titanate. These may be used individually by 1 type and may be used in combination of 2 or more type. These blending amounts can be appropriately selected according to the length and diameter of the fibrous materials and whiskers to be used, the type of the main resin material, the intended roller strength, etc. 70% by weight, preferably 10-20% by weight.

  As a material of the elastic layer 1 formed on the outer peripheral surface of the cylindrical substrate, an ultraviolet curable resin or an electron beam curable resin can be suitably used. Specific examples of such ultraviolet curable resins or electron beam curable resins include polyester resins, polyether resins, fluorine resins, epoxy resins, amino resins, polyamide resins, acrylic resins, acrylic urethane resins, urethane resins, and alkyds. Resins, phenol resins, melamine resins, urea resins, silicone resins, polyvinyl butyral resins, and the like can be used, and one or more of these can be used in combination. Moreover, you may use the modified resin which introduce | transduced specific functional group into these resin.

  Among the above, a (meth) acrylate-based resin composition containing a (meth) acrylate oligomer is particularly preferable. Examples of such (meth) acrylate oligomers include urethane (meth) acrylate oligomers, epoxy (meth) acrylate oligomers, ether (meth) acrylate oligomers, ester (meth) acrylate oligomers, and polycarbonate (meth). Examples include acrylate oligomers, and fluorine-based and silicone-based acrylic oligomers.

  The (meth) acrylate oligomer is composed of a compound such as polyethylene glycol, polyoxypropylene glycol, polytetramethylene ether glycol, bisphenol A type epoxy resin, phenol novolac type epoxy resin, adduct of polyhydric alcohol and ε-caprolactone, It can be synthesized by reaction with (meth) acrylic acid or by urethanizing a polyisocyanate compound and a (meth) acrylate compound having a hydroxyl group.

The urethane-based (meth) acrylate oligomer can be obtained by urethanizing a polyol, an isocyanate compound and a (meth) acrylate compound having a hydroxyl group.

  Examples of the epoxy-based (meth) acrylate oligomer may be any reaction product of a compound having a glycidyl group and (meth) acrylic acid. Among them, a benzene ring, a naphthalene ring, a spiro ring, a dicyclopentadiene, A reaction product of a compound having a cyclic structure such as tricyclodecane and having a glycidyl group and (meth) acrylic acid is preferred.

  Furthermore, ether-based (meth) acrylate oligomers, ester-based (meth) acrylate oligomers, and polycarbonate-based (meth) acrylate oligomers correspond to polyols (polyether polyol, polyester polyol, and polycarbonate polyol) and (meth) acrylic acid, respectively. It can obtain by reaction of.

  In these resin compositions for forming an elastic layer, a reactive diluent having a polymerizable double bond is blended for viscosity adjustment as desired. As such a reactive diluent, for example, a monofunctional, bifunctional or polyfunctional polymerizable compound having a structure in which (meth) acrylic acid is bonded to a compound containing an amino acid or a hydroxyl group by an esterification reaction or an amidation reaction Etc. can be used. These diluents are usually preferably used in an amount of 10 to 200 parts by weight per 100 parts by weight of the (meth) acrylate oligomer.

  Moreover, various conductive agents, such as an electronic conductive agent and an ionic conductive agent, can be mix | blended with this resin composition. Examples of the electron conductive agent include conductive carbon such as ketjen black and acetylene black, rubber carbon such as SAF, ISAF, HAF, FEF, GPF, SRF, FT, and MT, and a color ( Ink) carbon, pyrolytic carbon, natural graphite, artificial graphite, antimony-doped tin oxide, titanium oxide, zinc oxide, nickel, copper, silver, germanium and other metals and metal oxides, polyaniline, polypyrrole, polyacetylene, etc. Conductive whiskers such as conductive polymer, carbon whisker, graphite whisker, titanium carbide whisker, conductive potassium titanate whisker, conductive barium titanate whisker, conductive titanium oxide whisker, and conductive zinc oxide whisker. The blending amount of these electronic conductive agents is preferably 100 parts by weight or less, for example, 1 to 100 parts by weight, particularly 1 to 80 parts by weight, especially 10 to 50 parts by weight, based on 100 parts by weight of the resin.

  However, when the carbon-based conductive agent is contained in the ultraviolet curable resin, the blending amount is preferably 20 parts by weight or less, particularly 10 parts by weight or less, especially 5 parts by weight or less with respect to 100 parts by weight of the resin. . Since the carbon-based conductive agent easily absorbs ultraviolet rays, if the blending amount exceeds 20 parts by weight, the larger the amount of the conductive agent, the more difficult it is for the ultraviolet rays to reach the back of the layer, and thus the progress of the ultraviolet curing reaction proceeds sufficiently. There is a risk of disappearing.

  Examples of the ionic conductive agent include perchlorate, chlorate, hydrochloride, bromine such as tetraethylammonium, tetrabutylammonium, dodecyltrimethylammonium, hexadecyltrimethylammonium, benzyltrimethylammonium, and modified fatty acid dimethylethylammonium. Ammonium salts such as acid salts, iodates, borofluoride salts, sulfates, ethyl sulfates, carboxylates, sulfonates; alkali metals such as lithium, sodium, potassium, calcium, magnesium, alkaline earths Examples include metal perchlorates, chlorates, hydrochlorides, bromates, iodates, borofluorides, sulfates, trifluoromethyl sulfates, sulfonates, and the like. These ionic conductive agents are preferably used in an amount of usually 0.01 to 10 parts by weight, particularly 0.05 to 5 parts by weight, based on 100 parts by weight of the resin.

  In addition, the said electrically conductive agent may be used individually by 1 type, or may be used in combination of 2 or more types, In this case, it is also possible to combine an electronic conductive agent and an ionic conductive agent.

  When the conductive agent is a transparent conductive agent such as a metal oxide or metal oxide such as tin oxide, titanium oxide, zinc oxide, potassium titanate, barium titanate, nickel, copper, etc., ultraviolet rays are easily transmitted, The effect of not hindering the polymerization of the curable resin is obtained. The blending amount of the transparent conductive agent is usually 100 parts by weight or less, particularly 1 to 80 parts by weight, and more preferably 10 to 50 parts by weight with respect to 100 parts by weight of the resin.

  When using an ultraviolet curable resin for the elastic layer, it is preferable to contain a polymerization initiator. As the ultraviolet polymerization initiator, known ones can be used. For example, 4-dimethylaminobenzoic acid, 4-dimethylaminobenzoic acid ester, 2,2-dimethoxy-2-phenylacetophenone, acetophenone diethyl ketal, alkoxy Benzophenone derivatives such as acetophenone, benzyldimethyl ketal, benzophenone and 3,3-dimethyl-4-methoxybenzophenone, 4,4-dimethoxybenzophenone, 4,4-diaminobenzophenone, alkyl benzoylbenzoate, bis (4-dialkylaminophenyl) Benzene derivatives such as ketones, benzyl and benzylmethyl ketal, benzoin derivatives such as benzoin and benzoin isobutyl ether, benzoin isopropyl ether, 2-hydroxy-2-methyl Lupropiophenone, 1-hydroxycyclohexyl phenyl ketone, xanthone, thioxanthone and thioxanthone derivatives, fluorene, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl Pentylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane-1,2-benzyl-2-dimethylamino -1- (morpholinophenyl) -butanone-1 and the like. These may be used individually by 1 type and may use 2 or more types together. The blending amount of the ultraviolet polymerization initiator is preferably 0.1 to 10 parts by weight per 100 parts by weight of the (meth) acrylate oligomer.

  In addition to the above essential components, the resin composition constituting the elastic layer includes, if necessary, a tertiary amine such as triethylamine or triethanolamine in order to promote the photopolymerization reaction by the photopolymerization initiator, Alkylphosphine photopolymerization accelerators such as triphenylphosphine and thioether photopolymerization accelerators such as p-thiodiglycol may be added. Usually, the amount of these compounds added is preferably in the range of 0.01 to 10 parts by weight per 100 parts by weight of the (meth) acrylate oligomer.

  For at least the outermost elastic layer, it is preferable that the resin composition constituting the layer contains one or both of fluorine and silicon, and thereby the surface energy of the outermost elastic layer. As a result, the frictional resistance of the roller surface can be reduced, and the toner releasability can be improved, and wear in long-term use can be reduced and durability can be improved. .

  As a raw material of the ultraviolet curable resin containing fluorine, it is preferable to contain a fluorine-containing compound having a polymerizable carbon-carbon double bond, and only from such a fluorine-containing compound having a polymerizable carbon-carbon double bond. Or a composition comprising a blend of a fluorine-containing compound having a polymerizable double bond between carbon atoms and another compound having a polymerizable double bond between carbon atoms. Also good.

As the fluorine-containing compound having a polymerizable double bond between carbon atoms, fluoroolefins and fluoro (meth) acrylates are suitable.

As fluoroolefins, those having 2 to 12 carbon atoms in which 1 to all hydrogen atoms are substituted with fluorine are preferable. Specifically, hexafluoropropene [CF ₃ CF═CF ₂ , fluorine content 76 % By weight], (perfluorobutyl) ethylene [F (CF ₂ ) ₄ CH═CH ₂ , fluorine content 69 wt%], (perfluorohexyl) ethylene [F (CF ₂ ) ₆ CH═CH ₂ , fluorine containing 71% by weight], (perfluorooctyl) ethylene [F (CF ₂ ) ₈ CH═CH ₂ , fluorine content 72% by weight], (perfluorodecyl) ethylene [F (CF ₂ ) ₁₀ CH═CH ₂ , fluorine content 73% by weight], chlorotrifluoroethylene _[CF 2 = CFCl, fluorine content 49 wt%, 1-methoxy - (perfluoro-2 Chill-1-propene _{[(CF 3) 2 C =} CFOCH 3, the fluorine content 63 wt%, 1,4-vinyl octafluorobutane _{[(CF 2) 4 (CH} = CH 2) 2, fluorine content 60 % By weight], 1,6-divinyldodecafluorohexane [(CF ₂ ) ₆ (CH═CH ₂ ) ₂ , fluorine content 64% by weight], 1,8-divinylhexadecafluorooctane [(CF ₂ ) ₈ ( CH = CH ₂ ) ₂ , fluorine content 67 wt%].

As the fluoro (meth) acrylate, a fluoroalkyl (meth) acrylate having 5 to 16 carbon atoms in which 1 to all hydrogen atoms are substituted with fluorine is preferable. Fluoroethyl acrylate (CF ₃ CH ₂ OCOCH═CH ₂ , fluorine content 34 wt%), 2,2,3,3,3-pentafluoropropyl acrylate (CF ₃ CF ₂ CH ₂ OCOCH═CH ₂ , fluorine content 44 _{wt%), F (CF 2)} 4CH 2 CH 2 OCOCH = CH 2 ( fluorine content 51 wt%), 2,2,2-trifluoroethyl acrylate _{[CF 3 CH 2 OCOCH = CH} 2, the fluorine content 37 wt%], 2,2,3,3,3-pentafluoropropyl acrylate [CF ₃ CF ₂ CH ₂ OCOCH = CH ₂ , fluorine content 47 wt%], 2- (perfluorobutyl) ethyl acrylate [F (CF ₂ ) ₄ CH ₂ CH ₂ OCOCH═CH ₂ , fluorine content 54 wt%], 3- (perfluorobutyl ) -2-hydroxypropyl acrylate [F (CF ₂ ) ₄ CH ₂ CH (OH) CH ₂ OCOCH═CH ₂ , fluorine content 49 wt%], 2- (perfluorohexyl) ethyl acrylate [F (CF ₂ ) ₆ CH ₂ CH ₂ OCOCH═CH ₂ , fluorine content 59 wt%], 3- (perfluorohexyl) -2-hydroxypropyl acrylate [F (CF ₂ ) ₆ CH ₂ CH (OH) CH ₂ OCOCH═CH ₂ , Fluorine content 55 wt%], 2- (perfluorooctyl) ethyl acrylate [F (CF ₂ ) ₈ CH ₂ CH ₂ OCOCH═CH ₂ , fluorine content 62 wt%], 3- (perfluorooctyl) -2-hydroxypropyl acrylate [F (CF ₂ ) ₈ CH ₂ CH (OH) CH ₂ OCOCH═CH ₂ , fluorine Content 59 wt%], 2- (perfluorodecyl) ethyl acrylate [F (CF ₂ ) ₁₀ CH ₂ CH ₂ OCOCH═CH ₂ , fluorine content 65 wt%], 2- (perfluoro-3-methylbutyl) Ethyl acrylate [(CF ₃ ) ₂ CF (CF ₂ ) ₂ CH ₂ CH ₂ OCOCH═CH ₂ , fluorine content 57 wt%], 3- (perfluoro-3-methylbutyl) -2-hydroxypropyl acrylate [(CF _{3) 2 CF (CF 2)} 2 CH 2 CH (OH) CH 2 OCOCH = CH 2, the fluorine content 5 Wt%], 2- (perfluoro-5-methylhexyl) ethyl acrylate _{[(CF 3) 2 CF (} CF 2) 4 CH 2 CH 2 OCOCH = CH 2, fluorine content 61 wt%], 3- (par Fluoro-5-methylhexyl) -2-hydroxypropyl acrylate [(CF ₃ ) ₂ CF (CF ₂ ) ₄ CH ₂ CH (OH) CH ₂ OCOCH═CH ₂ , fluorine content 57 wt%], 2- (par Fluoro-7-methyloctyl) ethyl acrylate [(CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH ₂ OCOCH═CH ₂ , fluorine content 64 wt], 3- (perfluoro-7-methyloctyl) -2 -Hydroxypropyl acrylate [(CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH (OH) CH ₂ OCOCH = CH ₂ , Nitrogen content 60 wt%], 1H, 1H, 3H-tetrafluoropropyl acrylate [H (CF ₂ ) ₂ CH ₂ OCOCH═CH ₂ , fluorine content 41 wt%], 1H, 1H, 5H-octafluoropentyl Acrylate [H (CF ₂ ) ₄ CH ₂ OCOCH═CH ₂ , fluorine content 53 wt%], 1H, 1H, 7H-dodecafluoroheptyl acrylate [H (CF ₂ ) ₆ CH ₂ OCOC (CH ₃ ) = CH ₂ , Fluorine content 59 wt%], 1H, 1H, 9H-hexadecafluorononyl acrylate [H (CF ₂ ) ₈ CH ₂ OCOCH═CH ₂ , fluorine content 63 wt%], 1H-1- (trifluoromethyl ) Trifluoroethyl acrylate [(CF ₃ ) ₂ CHOCOCH═CH ₂ , fluorine content 51 wt%], 1H, 1H, 3H-hexafluorobutyl acrylate [CF ₃ CHFCF ₂ CH ₂ OCOCH═CH ₂ , fluorine content 48 wt%], 2,2,2-trifluoroethyl methacrylate [CF ₃ CH ₂ OCOC (CH ₃ ) = CH _2, fluorine content 34 wt%], 2,2,3,3,3-pentafluoro-propyl methacrylate _{[CF 3 CF 2 CH 2 OCOC} (CH 3) = CH 2, fluorine content 44 wt%, 2- (perfluorobutyl) ethyl methacrylate [F (CF ₂ ) ₄ CH ₂ CH ₂ OCOC (CH ₃ ) = CH ₂ , fluorine content 51 wt%], 3- (perfluorobutyl) -2-hydroxypropyl methacrylate _{[F (CF 2) 4 CH} 2 CH (OH) CH 2 OCOC (CH 3) = CH 2, fluorine-containing Rate 47% by weight], 2- (perfluorohexyl) ethyl methacrylate _{[F (CF 2) 6 CH} 2 CH 2 OCOC (CH 3) = CH 2, fluorine content 57 wt%], 3- (perfluorohexyl) 2-hydroxypropyl methacrylate [F (CF ₂ ) ₆ CH ₂ CH (OH) CH ₂ OCOC (CH ₃ ) = CH ₂ , fluorine content 53 wt%], 2- (perfluorooctyl) ethyl methacrylate [F ( _{CF 2) 8 CH 2 CH 2} OCOC (CH 3) = CH 2, fluorine content 61 wt%, 3-perfluorooctyl-2-hydroxypropyl methacrylate _{[F (CF 2) 8 CH} 2 CH (OH) CH ₂ OCOC (CH ₃ ) = CH ₂ , fluorine content 57 wt%], 2- (perfluorodecyl) ethyl methacrylate [F (CF ₂ ) ₁₀ CH ₂ CH ₂ OCOC (CH ₃ ) = CH ₂ , fluorine content 63 wt%], 2- (perfluoro-3-methylbutyl) ethyl methacrylate [(CF ₃ ) ₂ CF ( _{CF 2) 2 CH 2 CH 2} OCOC (CH 3) = CH 2, fluorine content 55 wt%], 3- (perfluoro-3-methylbutyl) -2-hydroxypropyl methacrylate _{[(CF 3) 2 CF (} CF ₂ ) ₂ CH ₂ CH (OH) CH ₂ OCOC (CH ₃ ) = CH ₂ , fluorine content 51 wt%], 2- (perfluoro-5-methylhexyl) ethyl methacrylate [(CF ₃ ) ₂ CF (CF _{2) 4 CH 2 CH 2 OCOC} (CH 3) = CH 2, fluorine content 59 wt%], 3- (perfluoro-5-methylhexyl) -2 Hydroxypropyl methacrylate _{[(CF 3) 2 CF (} CF 2) 4 CH 2 CH (OH) CH 2 OCOC (CH 3) = CH 2, fluorine content 56 wt%], 2- (perfluoro-7-methyl-octyl ) Ethyl methacrylate [(CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH ₂ OCOC (CH ₃ ) = CH ₂ , fluorine content 62 wt%], 3- (perfluoro-7-methyloctyl) -2- Hydroxypropyl methacrylate [(CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH (OH) CH ₂ OCOC (CH ₃ ) = CH ₂ , fluorine content 59 wt%], 1H, 1H, 3H-tetrafluoropropyl methacrylate _{[H (CF 2) 2 CH} 2 OCOC (CH 3) = CH 2, fluorine content 51 wt%], 1H, 1H, 5 - octafluoropentyl methacrylate _{[H (CF 2) 4 CH} 2 OCOC (CH 3) = CH 2, fluorine content 51 wt%], 1H, 1H, 7H- dodecafluoroheptyl methacrylate _{[H (CF 2) 6 CH} 2 OCOC (CH ₃ ) = CH ₂ , fluorine content 57 wt%], 1H, 1H, 9H-hexadecafluorononyl methacrylate [H (CF ₂ ) ₈ CH ₂ OCOC (CH ₃ ) = CH ₂ , fluorine content 61 % By weight], 1H-1- (trifluoromethyl) trifluoroethyl methacrylate [(CF ₃ ) ₂ CHOCOC (CH ₃ ) = CH ₂ , fluorine content 48% by weight], 1H, 1H, 3H-hexafluorobutyl methacrylate _{[CF 3 CHFCF 2 CH 2 OCOC} (CH 3) = CH 2, the fluorine content 4 And the like can be exemplified by weight%.

  The fluorine-containing compound having a polymerizable double bond between carbon atoms is preferably a monomer, an oligomer, or a mixture of a monomer and an oligomer. As an oligomer, a 2-20 mer is preferable.

  The compound having another polymerizable double bond between carbon atoms that may be blended with the fluorine-containing compound having a double bond between carbon atoms is not particularly limited. ) Acrylate monomers or oligomers or mixtures of monomers and oligomers are preferred.

  Examples of the (meth) acrylate monomer or oligomer include urethane (meth) acrylate, epoxy (meth) acrylate, ether (meth) acrylate, ester (meth) acrylate, polycarbonate (meth) acrylate, and the like. Or an oligomer, the monomer of a silicone type (meth) acryl, an oligomer, etc. can be mentioned.

  The (meth) acrylate oligomer is composed of a compound such as polyethylene glycol, polyoxypropylene glycol, polytetramethylene ether glycol, bisphenol A type epoxy resin, phenol novolac type epoxy resin, adduct of polyhydric alcohol and ε-caprolactone, It can be synthesized by reaction with (meth) acrylic acid or by urethanizing a polyisocyanate compound and a (meth) acrylate compound having a hydroxyl group.

  A urethane type (meth) acrylate oligomer is obtained by urethanizing a polyol, an isocyanate compound, and a (meth) acrylate compound having a hydroxyl group.

  Examples of the epoxy-based (meth) acrylate oligomer may be any reaction product of a compound having a glycidyl group and (meth) acrylic acid, but among them, a benzene ring, a naphthalene ring, a spiro ring, a dicyclo ring. A reaction product of a compound having a cyclic structure such as pentadiene or tricyclodecane and having a glycidyl group and (meth) acrylic acid is preferred.

  Furthermore, ether-based (meth) acrylate oligomers, ester-based (meth) acrylate oligomers, and polycarbonate-based (meth) acrylate oligomers correspond to polyols (polyether polyol, polyester polyol, and polycarbonate polyol) and (meth) acrylic acid, respectively. It can obtain by reaction of.

  The raw material for forming the ultraviolet curable resin containing silicon preferably contains a silicon-containing compound having a polymerizable carbon-carbon double bond, and silicon having such a polymerizable carbon-carbon double bond. It may be composed of only a compound containing a compound, and also comprises a composition obtained by blending a silicon-containing compound having a polymerizable carbon-carbon double bond and another type of compound having a polymerizable carbon-carbon double bond. It may be a thing.

  As the silicon-containing compound having a polymerizable double bond between carbon atoms, both-end-reactive silicone oils, one-end-reactive silicone oils, and (meth) acryloxyalkylsilanes are suitable. As the reactive silicone oil, those having a (meth) acryl group introduced at the terminal are preferable.

Specific examples of the silicon-containing compound suitably used in the present invention are shown below.
It is the Shin-Etsu Chemical Co., Ltd. both-ends reactive silicone oil (it has a functional group shown by following formula (1)) shown in following Table 1.

（上記式（２）中、Ｒ^１はメチル基またはブチル基であり、Ｒ^２は前記式（１）で示される官能基である） It is the Shin-Etsu Chemical Co., Ltd. one terminal reactive silicone oil (it has a structure shown by following formula (2)) shown in following Table 2.

(In the above formula (2), R ¹ is a methyl group or a butyl group, and R ² is a functional group represented by the formula (1)).

This is a double-end methacrylate-modified silicone oil (having a structure represented by the following formula (3)) manufactured by Toray Dow Corning Silicone Co., Ltd. shown in Table 3 below.

It is a one-end methacrylate-modified silicone oil (having a structure represented by the following formula (4)) manufactured by Toray Dow Corning Silicone Co., Ltd. shown in Table 4 below.

These are (meth) acryloxyalkylsilanes (in order, having the structures represented by the following formulas (5) to (11)) manufactured by Shin-Etsu Chemical Co., Ltd. shown in Table 5 below.

  These silicon-containing compounds may be used alone or in combination of two or more, or may be used in combination with other compounds having no carbon-containing double bond.

  These silicon-containing compounds having a polymerizable carbon-carbon double bond and other compounds having no carbon-containing carbon-carbon double bond are preferably used as a monomer, an oligomer, or a mixture of a monomer and an oligomer.

  The other compound having a polymerizable double bond between carbon atoms that may be blended with the silicon-containing compound having a polymerizable double bond between carbon atoms is not particularly limited. ) Acrylate monomers or oligomers or mixtures of monomers and oligomers are preferred. As an oligomer, a 2-20 mer is preferable.

  Examples of the (meth) acrylate monomer or oligomer include urethane (meth) acrylate, epoxy (meth) acrylate, ether (meth) acrylate, ester (meth) acrylate, polycarbonate (meth) acrylate, and the like. And fluorine-based (meth) acrylic monomers or oligomers.

The (meth) acrylate oligomer is composed of a compound such as polyethylene glycol, polyoxypropylene glycol, polytetramethylene ether glycol, bisphenol A type epoxy resin, phenol novolac type epoxy resin, adduct of polyhydric alcohol and ε-caprolactone, It can be synthesized by reaction with (meth) acrylic acid or by urethanizing a polyisocyanate compound and a (meth) acrylate compound having a hydroxyl group.

The urethane-based (meth) acrylate oligomer can be obtained by urethanizing a polyol, an isocyanate compound and a (meth) acrylate compound having a hydroxyl group.

Examples of the epoxy-based (meth) acrylate oligomer may be any reaction product of a compound having a glycidyl group and (meth) acrylic acid, and among them, a benzene ring,
A reaction product of a compound having a cyclic structure such as naphthalene ring, spiro ring, dicyclopentadiene, tricyclodecane, etc. and having a glycidyl group and (meth) acrylic acid is preferred.

Furthermore, ether-based (meth) acrylate oligomers, ester-based (meth) acrylate oligomers, and polycarbonate-based (meth) acrylate oligomers correspond to polyols (polyether polyol, polyester polyol, and polycarbonate polyol) and (meth) acrylic acid, respectively. It can obtain by reaction of.

  An appropriate amount of various additives can be added to the resin composition constituting the elastic layer as required. Further, the thickness of the elastic layer is not particularly limited, but it is usually preferably 1 to 500 μm, particularly 3 to 200 μm, and particularly preferably about 5 to 100 μm. If the thickness is less than 1 μm, the surface charging performance may not be sufficiently secured due to friction during long-term use. On the other hand, if the thickness exceeds 500 μm, the roller surface becomes hard and damages the toner. In some cases, toner adheres to a latent image holding member such as a photosensitive member or a stratified blade, resulting in an image defect.

Hereinafter, the present invention will be described in more detail with reference to examples.
As shown in FIG. 1, a flange 3 (material: POM (polyplastics) having shaft portions 11 at both ends of a metal pipe 2 (material: aluminum A6063, length: 230 mm, thickness 0.7 mm, outer diameter φ18 mm). The elastic layer 1 is formed with a film thickness of 1 mm by applying a coating material for forming an elastic layer to the outer peripheral surface of the cylindrical substrate 10 formed by EB-10)). went.

As the elastic layer-forming coating material, urethane (meth) acrylate oligomer UV3000B (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., functional group number: 2, molecular weight: 18000) 65 parts by weight, (meth) acrylate monomer LA (lauryl acrylate, Kyoeisha Chemical Co., Ltd., functional group number: 1, Tg: −3 ° C. 25 parts by weight and A-SA (β-acryloyloxyethyl hydrogen succinate, Shin-Nakamura Chemical Co., Ltd., functional group number: 1, Tg : -10 ° C) 10 parts by weight, photopolymerization initiator IRGACURE 184 (manufactured by Ciba Specialty Chemicals Co., Ltd.) 0.5 part by weight, and conductive agent MP-100 (manufactured by Akishima Chemical Industry Co., Ltd.) A UV curable resin raw material obtained by stirring and mixing with a stirrer at a liquid temperature of 70 ° C. at 60 rpm for 1 hour and filtration was used. The coating material for forming the elastic layer is cured to the extent that the shape can be maintained by applying spot UV irradiation while being applied, and then UV is applied for 5 seconds at a UV irradiation intensity of 700 mW / cm ² while rotating in a nitrogen atmosphere. The elastic layer 1 was formed by curing by irradiation.

  As shown in the figure, the flange 3 was provided with a hollow annular cutting margin 4 having a length of 2 mm and a wall thickness of 0.2 mm on the outer periphery in such a manner as to extend its end. Therefore, the outer diameter of the cutting margin 4 is the same as that of the metal pipe 2 and the flange 2. Further, at the time of coating, as shown in the figure, a coating cap 30 (material: polypropylene, length: 8 mm, outer diameter φ18 mm) is used, and the elastic layer 1 is formed about 7 mm outside the elastic layer forming end A. Went up. After the elastic layer 1 was formed, the portion of the cutting margin 4 was cut and removed using a blade to obtain a conductive roller as a developing roller.

  When the obtained roller was visually observed, it was confirmed that there was no film thickness unevenness at the end of the elastic layer 1 and no adhesion of cut residue to the end of the roller.

It is a width direction sectional view showing an example of a cylindrical base concerning the present invention. It is a schematic explanatory drawing which concerns on the manufacturing method of the electroconductive roller of this invention. It is a schematic explanatory drawing which concerns on the manufacturing method of the conventional electroconductive roller. (A) is an expanded sectional view of the roller edge part which concerns on the manufacturing method of the conventional electroconductive roller, (b) is a schematic explanatory drawing which shows the cutting residue adhering to the electroconductive roller edge part obtained.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,21 Elastic layer 2,22 Metal pipe 3,23 Flange 4 Cutting margin 10,20 Cylindrical base | substrate 11,31 Shaft part 30 Cap for coating 40 Cutting residue 50 Cutting member

Claims (7)

In a method for producing a conductive roller comprising at least one elastic layer on the outer peripheral surface of a cylindrical base body having shaft portions at both ends,
When forming the elastic layer on the outer peripheral surface of the cylindrical substrate, the cylindrical substrate having at least one end having a cutting margin having the same outer diameter as the outer peripheral surface is used to cut the elastic layer. A method for producing a conductive roller, comprising: coating and forming to a margin, and cutting and removing the cutting margin and the elastic layer on the cutting margin.   The method for producing a conductive roller according to claim 1, wherein the cutting margin is provided in a hollow ring shape along the outer periphery of the longitudinal end portion of the cylindrical base body.   The method for producing a conductive roller according to claim 1 or 2, wherein a length of the cutting margin is 0.3 mm or more.   The method for producing a conductive roller according to claim 3, wherein the length of the cutting margin is 8 mm or more, and a coating cap is not used during coating formation of the elastic layer.   The said cylindrical base | substrate consists of a metal pipe and the flange fitted by the both ends of this metal pipe, The said cutting margin is provided in this flange as described in any one of Claims 1-4. Manufacturing method of the conductive roller.   The method for manufacturing a conductive roller according to claim 5, wherein the flange is made of a resin material.   A conductive roller manufactured by the method for manufacturing a conductive roller according to claim 1.

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