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CN203054453U - Conductive elastomer, developing box and image forming device - Google Patents

Conductive elastomer, developing box and image forming device Download PDF

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Publication number
CN203054453U
CN203054453U CN 201220591875 CN201220591875U CN203054453U CN 203054453 U CN203054453 U CN 203054453U CN 201220591875 CN201220591875 CN 201220591875 CN 201220591875 U CN201220591875 U CN 201220591875U CN 203054453 U CN203054453 U CN 203054453U
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China
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roller
barrier layer
chemical barrier
conductive
conductive elastomer
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CN 201220591875
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Chinese (zh)
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杨正文
林路
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Ninestar Corp
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Zhuhai Seine Technology Co Ltd
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Abstract

本实用新型提供一种导电弹性体辊、显影盒以及图像形成装置,其特征在于,具有导电金属轴芯,在该导电金属轴芯外依次设置有化学阻隔层、弹性层和表面层,所述化学阻隔层为阻隔弹性层中产生或透过弹性层迁移或渗出的低分子物质的至少一层涂层,且为成膜材料在导电性金属轴芯的外表面成膜固化而成。该导电弹性体辊作为显影辊和充电辊,有效的防止导电性金属轴芯腐蚀,达到提高导电弹性体辊的特性,延长其使用寿命,也可以作为转印辊等应用于图像形成装置,改善了图像品质。

Figure 201220591875

The utility model provides a conductive elastic body roller, a developing cartridge and an image forming device, which is characterized in that it has a conductive metal shaft core, and a chemical barrier layer, an elastic layer and a surface layer are sequentially arranged outside the conductive metal shaft core. The chemical barrier layer is at least one layer of coating that blocks low-molecular substances generated in the elastic layer or migrates or seeps through the elastic layer, and is formed by forming a film and curing the film-forming material on the outer surface of the conductive metal core. The conductive elastomer roller is used as a developing roller and a charging roller, which can effectively prevent the corrosion of the conductive metal shaft core, improve the characteristics of the conductive elastomer roller, and prolong its service life. It can also be used as a transfer roller for image forming devices to improve image quality.

Figure 201220591875

Description

A kind of conductive elastomer roller, Delevoping cartridge and image processing system
Technical field
The utility model relates to a kind of conductive elastomer roller, Delevoping cartridge and image processing system, relate in particular to a kind of have the conductive elastomer roller of chemical barrier layer, the Delevoping cartridge that uses this conductive elastomer roller and image processing system, belong to the definition technique field.
Background technology
At present, various image processing systems such as duplicating machine, laser printer are widely used in people's the live and work, have become equipment indispensable in people's live and work.The image-forming principle of image forming apparatus such as duplicating machine and laser printer mainly contains the contact development and great-jump-forward develops.Using many is equipment or the device that adopts contact to develop.Comprise handle box (also claiming Delevoping cartridge) in the image processing system that adopts contact to develop, described handle box includes powder storehouse, powder feeding roller, developer roll, photosensitive drums, charging roller and powder delivery cutter etc.Principle and process that contact is developed are given photosensitive drum charging for utilizing charging roller, make photosensitive drum surface form uniform charged layer; The laser beam that laser instrument will be loaded with desire printing or copy image information shines photosensitive drum surface, makes photosensitive drum surface form the electrostatic latent image of respective image information.On the other hand, powder feeding roller provides developer to developer roll, and makes developing roller surface form the developer layer of uniform charged under the effect of powder delivery cutter; The developer roll of bearing developer is delivered to photosensitive drums with developer, makes the electrostatic latent image of photosensitive drum surface be converted into visual image.
For the image processing system that develops, described conductive elastomer roller can be used for developer roll, charging roller and/or the transfer roll of image processing system.
The conductive elastomer roller of prior art generally has following structure: is positioned at the conductive metal axle core at center, is coated on the elastic layer of conductive metal axle core periphery, and the superficial layer that is coated on the elastic layer periphery.Wherein, conductive metal axle core not only will apply voltage to elastic layer, also will be for elastic layer provide mechanical support, thereby adopt conductive metallic materials such as iron, aluminium to make bar-shaped or the tubular shafts core more.Elastic layer and superficial layer also shield to the conductive metal axle core at center simultaneously.But, in use, still have the lower-molecular substance (material that can cause metal erosion as moisture, salt, alkali compounds, acid compound and ion thereof etc., but be not limited to these) can be in elastic layer produce or see through the elastic layer migration or ooze out, contact with conductive metal axle core, conductive metal axle core is caused corrosion, thereby influence the serviceable life of conductive elastomer roller.The mission life of conductive elastomer roller is shortened, and must increase use and the maintenance cost of facilities such as laser printer.
Particularly; along with laser printer develops to miniaturization, light-weighted direction; and for cost-effective consideration; ever-reduced trend also appears in the thickness of the elastic layer of conductive elastomer roller; cause elastic layer that the protective effect of metal shaft core is significantly weakened, the possibility that the metal shaft core is corroded increases greatly.
At present, conductive elastomer roller manufacturing technology has mainly showed taking precautions against the problem that the metal shaft core is subjected to existing aspect the corrosion:
1) technician finds in test, even the metal shaft core is through surface treatment, as plating, sandblast etc., when it directly contacts with the elastic layer that adopts epichlorohydrin rubber or epichlorohydrin rubber and the composition of other rubber to form, under hot and humid environment, deposit a period of time, still can't avoid the generation of corroding.
2) add an amount of acid-acceptor in the rubber composition, can prevent that the hydrogen chloride that generates is to the influence of goods.Yet the technician finds in test, and the corrosion situation of the metal shaft core of handling through acid-acceptor is not avoided, and after the epichlorohydrin rubber conductive elastomer roller that contains acid-acceptor was deposited a period of time, the metal shaft core still can produce corrosion.And even increase the consumption of acid-acceptor, the situation of metal shaft core corrosion still can't be avoided, and the increase of acid-acceptor consumption can cause the product processing characteristics to become bad, and the hardness of elastic layer increases, and causes occurring image defects.
3) in rubber, add inorganic filler commonly used, as precipitated calcium carbonate, activated Calcium carbonate, calcium oxide, powder silicon dioxide etc., preventing that in the hope of motion or the absorption lower-molecular substance that hinders lower-molecular substance by them in elastic layer the metal shaft core is corroded, also is present more common safeguard procedures.Yet these inorganic fillers still can not avoid the metal shaft core to corrode under the different amounts level.This may be because the easy adsorption moisture of filler itself causes moisture accumulation in the elastic layer, easily causes corrosion.And the amount that adds inorganic filler can reduce resistance homogeneity and the incompressible permanent strain of elastic layer when higher, can increase its hardness simultaneously, and defective appears in the image that causes forming.
4) at the arranged outside superficial layer of elastic layer, in the hope of preventing that elastic layer from absorbing moisture and producing sour environment, also be the means that are used at present.Yet present employed surface layer material itself is not specially at this problem, just can not play this effect fully yet.After product was deposited a period of time, corrosion phenomenon still appearred in the metal shaft core.
5) adopt foaming elastomer material to prepare elastic layer, but only be to reach the physical property protection, after product was deposited a period of time, corrosion phenomenon still appearred in the metal shaft core.
In sum, can't prevent effectively that the reason that the metal shaft core is corroded from being that the metal shaft core outside is relatively poor to the chemical barrier of lower-molecular substance in the conductive elastomer roller, can't effectively stop moving into to the corrosion of metal shaft core because of lower-molecular substance.
The utility model content
The technical problem underlying that the utility model solves is to provide a kind of conductive elastomer roller, it has the formation of chemical barrier layer, when being used for device for image forming as developer roll and charging roller, owing to outside conductive metal axle core, one deck chemical barrier layer is set, can effectively stop the infiltration of lower-molecular substance to the corrosion of metal shaft core, not only promoted image quality, and can improve the conductive elastomer roller and have better serviceability and permanent serviceable life.
The utility model provides a kind of conductive elastomer roller, has conducting metal axle core, outside this conducting metal axle core, be disposed with chemical barrier layer, elastic layer and superficial layer, described chemical barrier layer is one deck at least, and forms for filmogen solidifies in the outside surface film forming of conductive metal axle core.
Further, the thickness of described chemical barrier layer is the 6-35 micron, is preferably the 7-30 micron, 8-25 micron more preferably, the thickness of chemical barrier layer can be the thickness of individual layer, also can be the gross thickness after the stack of multilayer barrier layer, wherein, each barrier layer thickness can be the same or different.
Further, described elastic layer is to be the elastic layer that basic material forms with the polar rubber.
Because polar rubber has resistance value and the better resistance homogeneity lower than non-polar rubber, can give the conductive elastomer roller better electrical property.Therefore, in utility model, polar rubber can be epichlorohydrin rubber or epichlorohydrin rubber etc., also can be the composition of they and other polar rubber.
Further, also be provided with one or more layers bonding coat between described chemical barrier layer and the elastic layer.
Being provided with of bonding coat is beneficial to the adhesion that strengthens chemical barrier layer and elastic layer.This bonding coat can be formed by known adhesive product, and wherein, bonding agent can be selected, for example chemlok CH202, TYPLY-BN, TS701-73 etc., but be not limited only to the scope of above-mentioned selection.
The utility model also provides a kind of Delevoping cartridge, and its structure is formed and comprised powder storehouse, powder feeding roller, developer roll, photosensitive drums waste powder hopper, cleaning doctor and charging roller at least, and wherein, described developer roll and/or charging roller are described conductive elastomer roller.
The utility model also provides a kind of image processing system, it removably is equipped with Delevoping cartridge, wherein, the structure of described Delevoping cartridge is formed and is comprised that at least powder storehouse, powder feeding roller, developer roll, photosensitive drums waste powder hopper, cleaning doctor and charging roller, described developer roll and/or charging roller are described conductive elastomer roller.
The manufacture method of conductive elastomer roller of the present utility model, by the conductive metal axle core to this conductive elastomer roller chemical barrier layer is set outward, thereby effectively prevent the corrosion of conductive metal axle core, reach the characteristic that improves the conductive elastomer roller, prolong its serviceable life.It also can be used as transfer roll etc. and is applied to image processing system as charging roller, developer roll, has improved image quality.
The manufacture method of conductive elastomer roller of the present utility model is included in conductive metal axle core chemical barrier layer is set outward, outside this chemical barrier layer, elastic layer is set, and the process that superficial layer is set outside this elastic layer, the described process that chemical barrier layer is set outside conductive metal axle core comprises:
Described filmogen (having comprised material of main part and conductive agent at least) is scattered in makes coating resin liquid in the solvent;
This coating resin liquid is coated on the outside surface of described conductive metal axle core, solvent evaporates and resin material are solidified, form the described chemical barrier layer of one deck at least at the outside surface of conductive metal axle core;
Wherein, described material of main part is selected from one or two or more kinds the combination with barrier resin.
Further, before elastic layer is set, also be included in the process that one or more layers bonding coat is set on the described chemical barrier layer.This bonding coat can be formed by known adhesive product, and wherein, bonding agent can be selected, for example chemlok CH202, TYPLY-BN, TS701-73 etc., but be not limited only to the scope of above-mentioned selection.
Further, before conductive metal axle core outer surface arranges chemical barrier layer, comprise that also the outside surface to conductive metal axle core carries out the degreasing pre-service, the ethyl acetate through processed carries out ungrease treatment to conducting metal axle core outer surface usually.
Further, described material of main part is the resin that has barrier and self have the good solidification performance, as chlorosulfonated polyethylene resin (CSM), ethylene-vinyl alcohol copolymer resin (EVOH), metachloroethylene copolymer, acrylonitrile copolymer, polyamide, PEN, polyethylene terephthalate; This material of main part also can be the combined material with barrier various kinds of resin.Preferred chlorosulfonated polyethylene resin (CSM) or the ethylene-vinyl alcohol copolymer resin (EVOH) of using separately is as material of main part, its main cause has good barrier and impermeability for these two kinds of resins itself, and implementation method easy, be easy to processing and forming.
Further, described filmogen also comprises inorganic filler, this inorganic filler can be the filler with various geometric configuratioies, the filler that preferably has schistose texture or strippable lamellar structure, for example, graphite, monox, mica, talcum, porcelain earth, polynite etc. and metal packing with flaky texture.Diameter of particle to inorganic filler does not have specific (special) requirements, is generally nano_scale particle.Because nano level inorganic filler has higher specific surface energy, can strengthen with the resin-bonded power of material of main part, and nano-sized filler especially flake nano level filler can form complicated labyrinth-like structure in the resin of material of main part, prolong the evolving path of lower-molecular substance in resin, be conducive to further strengthen chemical barrier.
Further, inorganic filler can be used a kind of, also can be that multiple common mixing is used.The preferred modified montmorillonoid with nanometer laminated structure that uses usually can be by commercially available.Material of main part with 100 weight portions is benchmark, and the consumption of inorganic filler is about the 1-10 mass parts, preferred 2-6 mass parts.
Further, described conductive agent comprises graphite, conductive black, ATO, ITO, polyaniline, polypyrrole, polythiophene, carbon nano-tube, conductive mica powder or metal oxide etc., the preferred use with on a small quantity but control the carbon black of electric conductivity easily, material of main part with 100 weight portions is benchmark, the consumption of conductive agent is about the 2-20 mass parts, preferred 4-10 mass parts.
Further, under the situation that does not hinder the utility model purpose, auxiliary agent such as also can be in chemical barrier layer an amount of interpolation spreading agent, defoamer, thickening agent.
Further, described solvent is not made particular determination, can satisfy single solvent or double solvents that the material of main part resin is disperseed therein and all can use, described double solvents refers to the combination of solvents different more than two kinds.This solvent can be water, alcohols, ester class, ketone, hydro carbons, benzene class, halogenated hydrocarbon, ethers, amide-type etc., for example methyl alcohol, ethanol, n-propanol, isopropyl alcohol, normal butyl alcohol, 2-butanols, 2-methyl-2-propyl alcohol, phenmethylol, phenixin, methyl acetate, ethyl acetate, acetone, normal hexane, ethylene dichloride, cyclohexane, butanone, tetrahydrofuran, normal heptane, butyl acetate, dimethylbenzene, cyclohexanone, dimethyl formamide or pentyl acetate.
Further, the outside surface that coating resin liquid is coated on described conductive metal axle core can adopt conventional methods such as comprising spraying, roller coating or dip-coating coating resin liquid to be coated on the outside surface of pretreated conductive metal axle core, so that described coating resin forms film at conductive metal axle core outer surface, drying is handled, in the outside surface formation chemical barrier layer of conductive metal axle core.The drying and forming-film process of this chemical barrier layer can be carried out conventional heated baking processing by the conductive metal axle core that will be coated with coating resin liquid, makes the solvent evaporates film-forming.In film forming procedure, by the process to applying, the number of times of spraying or roller coating for example, the time of coating, and the suitable adjustment of the solid content of resin liquid, thus obtain setting the chemical barrier layer of thickness.
The conductive elastomer roller that the utility model provides can be used for developer roll, charging roller and/or the transfer roll of image processing system.
In sum, the utility model is compared with the conductive elastomer roller of prior art, has the following advantages:
1, conductive elastomer roller of the present utility model arranges chemical barrier layer outward by the conductive metal axle core to this conductive elastomer roller, thereby effectively prevents the corrosion of conductive metal axle core, reaches the characteristic that improves the conductive elastomer roller, prolongs its serviceable life.
2, conductive elastomer roller of the present utility model, conductive elastomer roller compared to existing technology, it also can be used as transfer roll etc. and is applied to image processing system as charging roller, developer roll, has improved image quality.
Description of drawings
Fig. 1 is the structural representation of the utility model image processing system.
Fig. 2 is the structural representation of the Delevoping cartridge in the image processing system of the present utility model.
Fig. 3, the 4th, solid and the schematic cross-section of the conductive elastomer roller of the specific embodiment in the utility model.
Fig. 5, the 6th, solid and the schematic cross-section of the conductive elastomer roller in another specific embodiment in the utility model.
Embodiment
Further elaborate below in conjunction with specific embodiments and the utility model of embodiment, be intended to help the reader to understand flesh and blood of the present utility model better, can not be interpreted as any restriction to the utility model practical range.
As shown in Figure 1, image processing system 1 comprises laser scanner (LSU) 2, paper tray 3, donor rollers 4, transfer roller 5, transfer roll 6, fixation unit 7, distributing roller 8, discharge dish 9, Delevoping cartridge 10 and shell 11.Wherein, Delevoping cartridge 10 dismountable being installed in the image processing system.
As shown in Figure 2, Delevoping cartridge 10 comprises: powder storehouse 20, powder feeding roller 30, developer roll 40, photosensitive drums 50, waste powder hopper 60, cleaning doctor 70 and charging roller 80.Identical with Delevoping cartridge structure of the prior art, developer roll 40 contacts setting with charging roller 80 with photosensitive drums.
Image forming course is as follows: the carbon dust (not shown) in the powder storehouse 20 passes to developer roll 40 by powder feeding roller 30, forms the carbon dust layer of one deck uniform charged on the surface of developer roll 40; Simultaneously, described charging roller 80 gives photosensitive drums 50 chargings, makes the surface of photosensitive drums 50 form uniform charged layer; Laser instrument will be loaded with laser beam irradiation photosensitive drums 50 surfaces of image information, make photosensitive drums 50 surfaces form the electrostatic latent image of respective image information; The developer roll 40 of carrying carbon dust passes to carbon dust the photosensitive drums 50 of carrying electrostatic latent image, form visual carbon dust image on the surface of photosensitive drums 50, through transfer roll (not shown) transfer printing operation the carbon dust image on the photosensitive drums is transferred on the print media again, form corresponding visual carbon dust image at print media, namely finish imaging process (print or duplicate); Carbon dust residual on the photosensitive drums 50 enters waste powder hopper 60 under the effect of cleaning doctor 70.
Above-mentioned developer roll 40/ charging roller 80 and/or transfer roll (not shown) can use conductive elastomer roller provided by the utility model, also are one of vitals of image processing system.
To describe conductive elastomer roller in the utility model and forming method thereof below in detail, and the Delevoping cartridge and the image forming apparatus that utilize the conductive elastomer roller to form.
Shown in Fig. 3,4, the structure of conductive elastomer roller 100 is made of following four parts in the specific embodiment of the present utility model: conductive metal axle core 110, chemical barrier layer 120, elastic layer 130 and superficial layer 140.Conductive elastomer roller 100 among this embodiment has conducting metal axle core 110, outside this conducting metal axle core 110, be disposed with chemical barrier layer 120, elastic layer 130 and superficial layer 140, described chemical barrier layer 120 is one deck at least, and forms for filmogen solidifies in the outside surface film forming of conductive metal axle core 110.
Shown in Fig. 5,6, the conductive elastomer roller 200 of another specific embodiment of the present utility model (its manufacture method is referring to preparation embodiment 4), its structure is made of following five parts: conductive metal axle core 210, chemical barrier layer 220, elastic layer 230, superficial layer 240 and one or more layers bonding coat 250 between described chemical barrier layer 220 and elastic layer 230.Conductive elastomer roller 200 among this embodiment has conducting metal axle core 210, outside this conducting metal axle core 210, be disposed with chemical barrier layer 220, bonding coat 250, elastic layer 230 and superficial layer 240, described chemical barrier layer 220 is one deck at least, and forms for filmogen solidifies in the outside surface film forming of conductive metal axle core 210.
Bonding coat 250 can strengthen the adhesion of chemical barrier layer 220 and elastic layer 230.Do not have specific (special) requirements for the adhesive material that forms this bonding coat 250, can select any adhesive product that can play bonding effect to chemical barrier layer 220 and elastic layer 230.Between chemical barrier layer 220 and elastic layer 230, bonding coat 250 is set, can in wideer scope, implements for selection and the formation technology of chemical barrier layer 220 and/or elastic layer 230 materials.
In the above any embodiment, chemical barrier layer is one deck at least, for barrier property better is provided, can be set to multilayer, its gross thickness can be the 6-35 micron, be preferably the 7-30 micron, 8-25 micron more preferably, the thickness of chemical barrier layer can be the thickness of individual layer, also can be the gross thickness after the stack of multilayer barrier layer, wherein, each barrier layer thickness can be the same or different.
<conductive metal axle core 〉
Conductive metal axle core 110 can be used as electrode and supporting member, can be identical with known technology, and its shape can be bar-shaped or tubular shafts.Conductor material wherein is generally by for example, and conductive metallic materials such as iron, aluminium are made, and the utility model is not all done special restriction.Surface treatments such as the surface of conductive metal axle core can be electroplated, sandblast all belong to known technology.
<chemical barrier layer 〉
Chemical barrier layer 120 is that a kind of can effectively the obstruct produces in elastic layer or see through the elastic layer migration or ooze out lower-molecular substance (as moisture, salt, alkali compounds, acid compound and ion etc. thereof can cause the material of metal erosion, but be not limited to these) coating that contacts with conductive metal axle core, be formed at the outside surface of metal shaft core 110, its material of main part can be the resin with barrier, as chlorosulfonated polyethylene resin (CSM), ethylene-vinyl alcohol copolymer resin (EVOH), metachloroethylene copolymer, acrylonitrile copolymer, polyamide, PEN, polyethylene terephthalate; It also can be one or two or more kinds the combination with barrier resin.Preferred chlorosulfonated polyethylene resin (CSM) or the ethylene-vinyl alcohol copolymer resin (EVOH) of using separately is as material of main part, its main cause not only itself all has good barrier and impermeability for these two kinds of resins, and implementation method easy, be easy to processing and forming.
Also should contain the structure that strengthens chemical barrier in the chemical barrier layer, this structure can realize by disperse filler in above-mentioned resin.This filler can be the inorganic filler that its particulate has various geometric configuratioies, wherein, preferably has the filler of schistose texture or strippable lamellar structure, for example, and graphite, monox; Mica, talcum, porcelain earth, polynite stratified materials such as (or modified montmorillonoids) and the metal material such as aluminium, copper, zinc, iron with flaky texture.The inorganic filler diameter of particle is not had specific (special) requirements, be generally nano_scale particle.Because nano level inorganic filler has higher specific surface energy, can strengthen and adhesion as the resin of material of main part, and nano-sized filler especially flake nano level filler can form complicated labyrinth-like structure in the resin of material of main part, prolong the evolving path of lower-molecular substance in resin, be conducive to further strengthen chemical barrier.
Inorganic filler can be used a kind of, also can be that multiple common mixing is used.The preferred modified montmorillonoid with nanometer laminated structure that uses, described modified montmorillonoid is the polynite of handling through intercalator, can be by commercially available.Material of main part with 100 weight portions is benchmark, and the consumption of inorganic filler is about the 1-10 mass parts, preferred 2-6 mass parts.
In the formation raw material of described chemical barrier layer, also need to add conductive agent, as graphite, conductive black, ATO, ITO, polyaniline, polypyrrole, polythiophene, carbon nano-tube, conductive mica powder or metal oxide etc., material of main part with 100 weight portions is benchmark, the consumption of conductive agent is about the 2-20 mass parts, preferred 4-10 mass parts.When being beneficial to control electric conductivity, the least possible material of use amount is more preferred, for example conductive black.
Under the scope that does not hinder the utility model purpose, also can in chemical barrier layer, add auxiliary agents such as spreading agent, defoamer, thickening agent in right amount.
Form the used solvent of chemical barrier coating and do not make particular determination, as long as single solvent or double solvents that the material of main part resin is disperseed therein, described double solvents is the combination of solvent different more than two kinds.This solvent can be water, alcohols, ester class, ketone, hydro carbons, benzene class, halogenated hydrocarbon, ethers, amide-type etc., for example methyl alcohol, ethanol, n-propanol, isopropyl alcohol, normal butyl alcohol, 2-butanols, 2-methyl-2-propyl alcohol, phenmethylol, phenixin, methyl acetate, ethyl acetate, acetone, normal hexane, ethylene dichloride, cyclohexane, butanone, tetrahydrofuran, normal heptane, butyl acetate, dimethylbenzene, cyclohexanone, dimethyl formamide or pentyl acetate.
Take all factors into consideration barrier layer to protective action and the electric conductivity influence of conductive elastomer roller, the thickness of described chemical barrier layer can be the 6-35 micron, be preferably the 7-30 micron, 8-25 micron more preferably, the thickness of chemical barrier layer can be the thickness of individual layer, also can be the gross thickness after the stack of multilayer barrier layer, wherein, each barrier layer thickness can be the same or different.
In the concrete operations, the outside surface that coating resin liquid is coated on described conductive metal axle core can adopt conventional methods such as comprising spraying, roller coating or dip-coating coating resin liquid to be coated on the outside surface of pretreated conductive metal axle core, so that described coating resin forms film at conductive metal axle core outer surface, drying is handled, in the outside surface formation chemical barrier layer of conductive metal axle core.The drying and forming-film process of this chemical barrier layer can be carried out heated baking processing or other heat treatment mode by the conductive metal axle core that will be coated with coating resin liquid, makes the solvent evaporates film-forming.In film forming procedure, by the process to applying, the number of times of spraying or roller coating for example, the time of coating, and the suitable adjustment of the solid content of resin liquid, thus obtain setting the chemical barrier layer of thickness.
<elastic layer 〉
Elastic layer 130 is made of conductive rubber, can select one or more basic materials as elastic layer of polar rubber or non-polar rubber, preferably uses polar rubber.Employed basic material is for example: epichlorohydrin rubber, natural rubber, ethylene-propylene-diene rubber, cis-butadiene rubber, butyl rubber, styrene-butadiene rubber, nitrile rubber, neoprene, silicon rubber, fluororubber, ACM, thiokol etc.Can contain compounding ingredient in the conductive rubber, as: activator, anti aging dope, softening agent, processing aid, promoter, vulcanizing agent etc.Compounding ingredient can be product well known in the art.Can contain conductive agent in the conductive rubber, as: graphite, conductive black, conductive mica powder etc.Conductive rubber also can contain filler, as: calcium carbonate, white carbon, porcelain earth, zeyssatite, polynite, halloysite etc.Rubber mixes formation conductive rubber potpourri with compounding ingredient, conductive agent, filler, form conductive elastomer through over cure then.This conductive elastomer is overlying on the outside of chemical barrier layer, forms the roller with elastic layer.Whether this roller is carried out surface treatment is not restricted.For example, if this roller is carried out surface treatment, can grind or other mechanical treatment this roller surface, also can carry out chemical treatment to this roller surface, as: carry out photochemical modification or electrochemical modification, or resin bed etc. is set.
<superficial layer 〉
The technology of laying of superficial layer 140 does not limit, and can be the superficial layer that forms after the elastic layer oxidation, also can be by with resin-coated in the outer known technologies such as resinous coat that form of elastic layer.
Can be used for developer roll and charging roller in the Delevoping cartridge according to conductive elastomer roller of the present utility model; Also can be used for using image forming apparatus such as duplicating machine, facsimile recorder and the printer of this Delevoping cartridge.Be used for laser printer (trade name: PANTUM P2000 with conductive elastomer roller of the present utility model below; The specific embodiment of charging roller Zhuhai Seine Printing Technology Co., Ltd.) further describes.
Embodiment 1
The pre-service of conductive metal axle core:
With the ethyl acetate after processed the outside surface of the conductive metal axle core (SUM22) of 6 millimeters of external diameters is carried out ungrease treatment.
The formation of chemical barrier layer:
Chlorosulfonated polyethylene resin (trade name: CSM40 with 100 mass parts; Jilin Chemical Industrial Co. Ltd.'s production), the modified montmorillonoid (trade name: DK4 of 6 mass parts; Zhejiang Feng Hong new material incorporated company produces) and the conductive black (trade name: VULCANXC72 of 5 mass parts; Cabot Co.,Ltd produces), add in the organic solvent dimethylbenzene, be uniformly dispersed with dispersion machine, make coating resin liquid.Utilize flush coater to be coated on conductive metal axle core outer surface repeatedly this coating resin liquid, place then in the baking box with 80 ℃ of temperature bakings 30 minutes, make solvent evaporates, after the taking-up cooling, coating material forms described chemical barrier layer at the outside surface of conducting metal axle core.The thickness that records chemical barrier layer is 15 microns, obtains having the conductive metal axle core of chemical barrier layer.
The formation of elastic layer:
With 100 mass parts epichlorohydrin rubbers (trade name: Hydrin T3106; Zeon Corp's production) with 6.5 mass parts zinc paste, 1 mass parts stearic acid, 35 mass parts activated Calcium carbonates (granularity: 1250 orders; The production of Omya Fine Chemical Co., Ltd), 10 mass parts conductive blacks (trade name: VULCAN XC-72; Cabot Co.,Ltd produces) in mixing apparatus, mix, add 0.5 mass parts sulphur, 2 mass parts cumyl peroxide (trade names: DCP-40C then; Shanghai Gaoqiao petrochemical corporation (complex) of China Petrochemical Industry produces) mix, obtain unvulcanized conductive rubber potpourri;
Described unvulcanized conductive rubber potpourri is coated on the above-mentioned conductive metal axle core outside with chemical barrier layer, then conductive metal axle core is arranged in the cylindric mould of internal diameter 15mm, and makes the two concentric.Mould is put in the firing equipment, in 150 ℃ of hot briquettings 20 minutes, after the demoulding, this roller with conductive elastomer placed in 145 ℃ the baking oven post-cure 2 hours, after the cooling, with milling apparatus the electrically conductive elastic external surface is ground, obtain elastic layer thickness and be 2 millimeters roller, it rotates resistance is 106 ohm, and the Shore A hardness of this conductive elastomer is 58 degree.
The formation of superficial layer:
With fluororesin (trade name: ZB-F100; The Dalian fluorine coating company limited of nation of shaking produces) with MQ resin (trade name: HL-MQ100; Shin-Etsu Chemial Co., Ltd produces) be dissolved in jointly in butyl acetate and the double solvents of dimethylbenzene with volume ratio 1:1 composition, form coating resin solution, and the solid component concentration of above-mentioned two kinds of resins is followed successively by: 15%, 6%.With respect to the fluororesin solid state component of 100 mass parts, add 5 mass parts conductive blacks (trade name: Ketjenblack EC-300J; Akzo Nobel N.V.'s production), 10 mass parts conductive nano titanium dioxide (trade names: DZC-03; The clear chemical industry of Guangzhou moral company limited produces), after the dispersion machine dispersion, with respect to the fluororesin solid state component of 100 mass parts, being added with effective substance is 40 mass parts polyurethane curing agents (trade names: Desmodur N75; Beyer Co., Ltd produces), after 30 minutes, solidified 2 hours in 130 ℃ baking oven at 80 ℃ baking oven inner dryings by on the roller of immersion coating moulding formerly the back that stirs, and obtains charging roller, and its surface layer thickness is 12 microns.
Embodiment 2
Except with ethylene-vinyl alcohol copolymer resin (trade name: F171; Japan Kuraray company produces) replace chlorosulfonated polyethylene resin be used for the chemical barrier layer material of main part, with normal butyl alcohol substituted dimethyl benzene as beyond the solvent, all the other obtain charging roller according to method similarly to Example 1, its chemical barrier layer thickness is 15 microns.
Embodiment 3
At first at pretreated conductive metal axle wicking surface one deck being set is the chemical barrier layer of material of main part with the chlorosulfonated polyethylene resin, and method to set up is with embodiment 1, and the chemical barrier layer thickness that obtains is 15 microns; In the outside of this chemical barrier layer one deck being set again then is the chemical barrier layer of material of main part with the ethylene-vinyl alcohol copolymer resin, and method to set up is with embodiment 2, and THICKNESS CONTROL is 10 microns; The method to set up of elastic layer and superficial layer is with embodiment 1.
Embodiment 4
Except the pretreatment mode of conductive metal axle core changes into: at first with through the ethyl acetate of processed conductive metal axle core (SUM 22) outside surface of 6 millimeters of external diameters being carried out ungrease treatment, with sand-blasting machine conductive metal axle core outer surface is carried out blasting treatment then, purge the dust of sand blasted surface again with the pressurized air of dry oil free.All the other obtain charging roller according to method similarly to Example 1, and its chemical barrier layer thickness is 15 microns.
Embodiment 5
Except arranging outside one deck bonding coat having the conductive metal axle core of chemical barrier layer, all the other obtain charging roller according to method similarly to Example 1, and the thickness of its chemical barrier layer is 15 microns.
The method to set up of bonding coat: with bonding agent (trade name: Chemlok233; The production of Dehua, Lip river, Shanghai company limited) technology of recommending according to this adhesive product is arranged at the conductive metal axle core skin with chemical barrier layer.
Embodiment 6
Except with 100 parts of nitrile rubbers (trade name: JSR N230S; JSR Corp. produces) replace outside 100 parts of epichlorohydrin rubbers formation elastic layers, all the other obtain charging roller according to method similarly to Example 1, and its chemical barrier layer thickness is 15 microns.
Embodiment 7
Do not add in the chemical barrier layer formation process the modified montmorillonoid, all the other obtain charging roller according to method similarly to Example 1, and its chemical barrier layer thickness is 15 microns.
Embodiment 8
Except the control coat operations makes the chemical barrier layer thickness that solidify to form is 30 microns, all the other obtain charging roller according to method similarly to Example 1.
Embodiment 9
Except the control coat operations makes the chemical barrier layer thickness that solidify to form is 40 microns, all the other obtain charging roller according to method similarly to Example 1.
Embodiment 10
Except the control coat operations makes the chemical barrier layer thickness that solidify to form is 4 microns, all the other obtain charging roller according to method similarly to Example 1.
Comparative example 1
Except chemical barrier layer was not set, all the other obtained charging roller according to method similarly to Example 1.
Comparative example 2
Except chemical barrier layer was not set, all the other obtained charging roller according to method similarly to Example 4.
Comparative example 3
Except chemical barrier layer was not set, all the other obtained charging roller according to method similarly to Example 6.
Comparative example 4
Do not arrange outside the bonding coat except chemical barrier layer is not set conductive metal axle core, all the other obtain charging roller according to method similarly to Example 1.
Bonding coat method to set up: with primary coat bonding agent (trade name: Chemlok 205; Dehua, Lip river, Shanghai is learned company limited and is produced) and face coating adhesive (trade name: Chemlok233; Dehua, Lip river, Shanghai is learned company limited and is produced) be set in turn in outside the conductive metal axle core, the processing technology of recommending according to this bonding agent is arranged at conductive metal axle core skin, and its bondline thickness is 16 microns.
Comparative example 5
Do not arrange outside the bonding coat except chemical barrier layer is not set conductive metal axle core, all the other obtain charging roller according to method similarly to Example 1.
Bonding coat method to set up: with primary coat bonding agent (trade name: THIXON P-11EF; U.S. Rhom and Hass produces) and face coating adhesive (trade name: THIXON 511EF; U.S. Rhom and Hass produces) be set in turn in outside the conductive metal axle core, the processing technology of recommending according to this bonding agent is arranged at conducting metal axle core skin, and its bondline thickness is 16 microns.
Comparative example 6
Except arranging outside the chemical barrier layer conductive metal axle core in such a way, all the other are according to obtaining charging roller with embodiment 1 same method:
Acryl resin (trade name: TCA-837B-1 with 100 mass parts; The production of the prosperous resin of platform company limited), the modified montmorillonoid (trade name: DK4 of 6 mass parts; Zhejiang Feng Hong new material incorporated company produces) and 5 mass parts conductive blacks (trade name: VULCAN XC72; Cabot Co.,Ltd produces), add in organic solvent acetic acid butyl ester, be uniformly dispersed with dispersion machine, form coating resin liquid.This coating resin liquid is coated conductive metal axle core outer surface with flush coater, places then in the baking box with 80 ℃ of temperature bakings 30 minutes, take out cooling after, form described chemical barrier layer at the outside surface of conducting metal axle core.The thickness that records chemical barrier layer is 15 microns, obtains having the conductive metal axle core of chemical barrier layer thus.
Comparative example 7
Except arranging outside the chemical barrier layer conductive metal axle core in such a way, all the other are according to obtaining charging roller with embodiment 1 same method.
Fluororesin (trade name: ZB-F100 with 100 mass parts; The Dalian fluorine coating company limited of nation of shaking produces), the modified montmorillonoid (trade name: DK4 of 6 mass parts; Zhejiang Feng Hong new material incorporated company produces) and 5 mass parts conductive blacks (trade name: VULCAN XC72; Cabot Co.,Ltd produces) and active principle be the curable urethane resin agent (trade name: Desmodur N75 of 40 mass parts; Beyer Co., Ltd produces), add in organic solvent acetic acid butyl ester, be uniformly dispersed with dispersion machine, form coating resin liquid.This coating resin liquid is coated conductive metal axle core outer surface with flush coater, place in the baking box with 80 ℃ of temperature bakings after 30 minutes then, in 130 ℃ baking oven, solidified 2 hours, take out cooling after, form described chemical barrier layer at the outside surface of conducting metal axle core.The thickness that records chemical barrier layer is 15 microns, obtains having the conductive metal axle core of chemical barrier layer thus.
The metal shaft wicking surface corrosion evaluation of charging roller
The surperficial evaluation method of charging roller can be selected laser diameter measurement method or sciagraphy, use laser diameter measuring instrument (trade name: LDM-50, the bright and sharp Science and Technology Ltd. in Zhengzhou City) to measure, filter out because the corrosion of metal shaft core causes the conductive elastomer roller of concave-convex surface for guaranteeing meticulous no omission.
Usually, in high-temperature and high humidity environment, cause the chemical reaction of metal shaft core corrosion to be accelerated.The charging roller that above-described embodiment is made is (50 ℃ of hot and humid environments, 90%RH) store in the chamber, take out 50 charging rollers respectively at random when placing 1,2,3,6,9 month, use laser diameter measuring instrument to measure the cylindricity of every charging roller, measuring method is as follows:
At first, certain is a bit located on the charging roller turning axle, with a column direction fix and length greater than the position of radially inswept above-mentioned this point of parallel light belt of charging roller diameter, utilize the geometrical principle of optics, parallel light belt vertically projects to the laser receiver on opposite, is recharged the projected length that roller blocks and is the corresponding charging roller diameter of this point on the turning axle.Simultaneously, charging roller is done in laser diameter measuring instrument and is rotated in a circumferential direction, under certain speed conditions, the fluctuation size of adjacent moment diameter instantaneous value can reflect the concavo-convex situation on certain charging roller surface, some place on the turning axle, therefore, rotate a circle and just can totally measure the concave-convex surface situation of certain circumference in some place on the turning axle.Further, charging roller is axially moved, just can collect the concave-convex surface situation of whole roller length direction.
The judgement of the concavo-convex situation on the charging roller surface that corrosion causes for the metal shaft core, need and move axially under the speed at certain rotating speed, the given scope of fluctuation size to adjacent rotation moment diameter instantaneous value is screened, that is: the rotating speed of charging roller is at 60 ~ 150rpm, the speed that moves axially is at 2 ~ 5mm/s, more than the selected 0.01mm of the fluctuation size criteria scope of adjacent moment diameter instantaneous value reaches, namely can be judged to be the surface bigger concavo-convex defective has taken place, the concavo-convex defective that the corrosion of metal shaft core causes did not appear in 6 months in placement under the hot and humid environment, can guarantee that it image defects do not occur in the time limit in serviceable life of electrophotographic process cartridge.
Evaluation criterion is as follows:
Do not find diameter in zero: 50 charging roller in 0.01mm and above undulate quantity, namely do not find bigger concave-convex surface situation;
*: 50 charging rollers find that in measuring process at least one diameter is in 0.01mm and above undulate quantity.
Picture appraisal
The metal shaft core of above-mentioned charging roller is after estimating through corrosion surface, diameter occurs and be divided into " surface imperfection " and " surface is intact " two classes at 0.01mm and above undulate quantity by placing under the hot and humid environment to have or not in 6 months, respectively it is installed on the electrophotographic process cartridge then, uses monochromatic laser printer (trade name: PANTUM P2000; Zhuhai Seine Printing Technology Co., Ltd. produces) at ambient temperature and moisture environment (N/N; 25 ℃, 55%RH) export 30% blackness full-colour image down, carry out picture appraisal.
Find that wherein the charging roller (embodiment 1 ~ embodiment 8) that is no more than 35 microns when barrier layer thickness is " surface is intact ", and print image is all evenly good, zero defect; When barrier layer thickness surpasses 35 microns (embodiment 9), though charging roller all is " surface is intact ", print image can produce the bad phenomenon of the inhomogeneous or black splotch of image, influences print quality; (comparative example 1 ~ comparative example 7, embodiment 10) do not occur " surface imperfection " when barrier layer and barrier layer thickness deficiency was set, and all produced periodically cloud form spot with the image that the charging roller of " surface imperfection " is printed.
The definition of experimental situation:
Low temperature and low humidity environment (L/L): 10 ℃, 20%RH
Ambient temperature and moisture environment (N/N): 25 ℃, 55%RH
Hot and humid environment (H/H): 35 ℃, 80%RH
The corrosion phenomenon checking
Above-mentioned all charging rollers after corrosion surface evaluation and picture appraisal are peeled off elastic layer with the cutting cutlery, conductive metal axle core is exposed, observe conductive metal axle core and whether produce rust corrosion.Corrosion phenomenon does not take place in the charging roller metal shaft core of finding " surface is intact "; The charging roller metal shaft core of " surface imperfection " all has and corrodes, and finds that some corrosion position is corresponding to obvious macroscopic concave-convex surface zone.
More than, the verification method of embodiment and comparative example is not limited to the checking to charging roller, and to conductive elastomer rollers such as developer roll and transfer rolls, though the image deflects kind that causes difference to some extent, principle is suitable equally.
Charging roller metal shaft wicking surface corrosion evaluation result, see the following form shown in 1:
Table 1
? 1 month 2 months 3 months 6 months 9 months
Embodiment
1
Embodiment 2
Embodiment 3
Embodiment 4
Embodiment 5
Embodiment 6
Embodiment 7 ×
Embodiment 8
Embodiment 9
Embodiment 10 × × × ×
Comparative example 1 × × × × ×
Comparative example 2 × × × × ×
Comparative example 3 × × ×
Comparative example 4 × × × ×
Comparative example 5 × × × × ×
Comparative example 6 × × ×
Comparative example 7 × × ×
By metal shaft core corrosion evaluation and picture appraisal as can be known:
The conductive elastomer roller that certain thickness chemical barrier layer is set is difficult for producing the corrosion of metal shaft core, and the picture quality that the conductive elastomer roller for preparing by this method forms in actual use is good;
And the conductive elastomer roller that material of main part that chemical barrier layer, chemical barrier layer thickness arrange deficiency, chemical barrier layer uses no barrier resin material and bonding coat only is set is not set, can't avoid the problem of metal shaft core corrosion, after corrosion appears in the metal shaft core, defective appears in the image that forms, when the chemical barrier layer thickness surpasses 35 microns, also image defects can appear.
It should be noted that at last: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although with reference to previous embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.

Claims (8)

1. conductive elastomer roller, it is characterized in that, has conducting metal axle core, outside this conducting metal axle core, be disposed with chemical barrier layer, elastic layer and superficial layer, described chemical barrier layer produces in the elastic layer or sees through the elastic layer migration or the coating of one deck at least of the lower-molecular substance that oozes out for intercepting, and forms for filmogen solidifies in the outside surface film forming of conductive metal axle core.
2. conductive elastomer roller according to claim 1 is characterized in that, the thickness of described chemical barrier layer is the 6-35 micron.
3. conductive elastomer roller according to claim 2 is characterized in that, the thickness of described chemical barrier layer is the 7-30 micron.
4. conductive elastomer roller according to claim 3 is characterized in that, the thickness of described chemical barrier layer is the 8-25 micron.
5. conductive elastomer roller according to claim 1 is characterized in that, described elastic layer is to be the elastic layer that basic material forms with the polar rubber.
6. according to each described conductive elastomer roller of claim 1-5, it is characterized in that, also be provided with one or more layers bonding coat between described chemical barrier layer and the elastic layer.
7. Delevoping cartridge, its structure is formed and is comprised powder storehouse, powder feeding roller, developer roll, photosensitive drums waste powder hopper, cleaning doctor and charging roller at least, it is characterized in that described developer roll and/or charging roller are each described conductive elastomer roller of claim 1-6.
8. image processing system, it removably is equipped with Delevoping cartridge, it is characterized in that, the structure of described Delevoping cartridge is formed and is comprised that at least powder storehouse, powder feeding roller, developer roll, photosensitive drums waste powder hopper, cleaning doctor and charging roller, described developer roll and/or charging roller are each described conductive elastomer roller of claim 1-6.
CN 201220591875 2012-11-09 2012-11-09 Conductive elastomer, developing box and image forming device Expired - Fee Related CN203054453U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103809412A (en) * 2012-11-09 2014-05-21 珠海赛纳打印科技股份有限公司 Conductive elastomer roll, manufacturing method of conductive elastomer roll, and image forming device of conductive elastomer roll
CN104745060A (en) * 2013-12-27 2015-07-01 珠海赛纳打印科技股份有限公司 Coating composition, conductive elastomer roller, manufacturing method of conductive elastomer roller, processing box with conductive elastomer roller and image formation device with processing box
TWI558620B (en) * 2014-08-29 2016-11-21 佐藤控股股份有限公司 Elastic body roller
CN103809412B (en) * 2012-11-09 2016-11-30 珠海艾派克科技股份有限公司 Conductive elastomer roller, manufacture method and image processing system thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103809412A (en) * 2012-11-09 2014-05-21 珠海赛纳打印科技股份有限公司 Conductive elastomer roll, manufacturing method of conductive elastomer roll, and image forming device of conductive elastomer roll
CN103809412B (en) * 2012-11-09 2016-11-30 珠海艾派克科技股份有限公司 Conductive elastomer roller, manufacture method and image processing system thereof
CN104745060A (en) * 2013-12-27 2015-07-01 珠海赛纳打印科技股份有限公司 Coating composition, conductive elastomer roller, manufacturing method of conductive elastomer roller, processing box with conductive elastomer roller and image formation device with processing box
CN104745060B (en) * 2013-12-27 2017-10-03 纳思达股份有限公司 Coating composition, conductive elastomer roller and its manufacture method, handle box and image processing system using it
TWI558620B (en) * 2014-08-29 2016-11-21 佐藤控股股份有限公司 Elastic body roller

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