CN1218920A - Intercept member of developing agent - Google Patents
Intercept member of developing agent Download PDFInfo
- Publication number
- CN1218920A CN1218920A CN 98115601 CN98115601A CN1218920A CN 1218920 A CN1218920 A CN 1218920A CN 98115601 CN98115601 CN 98115601 CN 98115601 A CN98115601 A CN 98115601A CN 1218920 A CN1218920 A CN 1218920A
- Authority
- CN
- China
- Prior art keywords
- rubber
- developing agent
- developer
- rubber elastomer
- intercept member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
The present invention provides a developer-isolating member, the developer supplied to static latent image holder from the developing sleeve by contacting with the surface of the developing sleeve. The developer-isolating member is combined with a rubber elastic body and a hard substrate and the compound is joined together with vulcanized binder. The developer-isolating member has satisfactory stable developer-isolating performance and excellent durability such as wear resistance.
Description
The present invention relates to the intercept member of developing agent that a kind of electrostatic latent image to display keeps body to supply with or use during the blocking developer.
Duplicating machine or laser printer (below, said duplicating machine comprises laser printer) basic video picture function be on the video picture sleeve, to form magnetic brush, developer as painted charged powder is attached on the electrostatic latent image of electrostatic latent image maintenance body, makes it become visible image.As its means, be divided into 2 kinds of dry method and wet type visualization methods haply.Dry method can also be divided into single component video picture mode and bi-component video picture mode.Wherein, the bi-component video picture mode of dry method is considered to favourable to duplicating machine, often is used.
Under the occasion of bi-component video picture mode, the developer that is made of the carrier and the toner of frictional electrification is subjected to magnetic attraction, is sent on the video picture sleeve, makes electrostatic latent image keep electrostatic latent image video picture on the body.In this process, because toner is consumed, the carrier on the video picture sleeve is in the few state of toner.Therefore on must the assigned address in display,, make it mix absorption once more with toner, therefore be used to make intercept member of developing agent of its recovery separation just to become very important from the last carrier that reclaims the toner deficiency of video picture sleeve.
On the other hand, have in the color copy machine of double-colored above primary colors, become visible image in order to make the electrostatic latent image that forms on the electrostatic latent image maintenance body as recording medium, the toner that the display of equipment is formed coloring pigment is attached on the above-mentioned electrostatic latent image., the display of accommodating each colour toners that is used for colorize is contained in a plurality of duplicating machine herein, uses these displaies selectively.For example, form under the occasion of full-color image, the various displaies of equipment contain blueness, redness and yellow, also can accommodate the toner of black as required.Color image is broken down into versicolor electrostatic latent image, makes these shades of colour electrostatic latent images keep forming on the body at electrostatic latent image, with above-mentioned toner imaging of all kinds, each colour toners is overlapped together, forms color image.Therefore, have the display of double-colored above developer, must be from the last developer that reclaims of above-mentioned video picture sleeve, in addition, when not supplying with video picture, must control on the sub-image that developer is not attached to electrostatic latent image maintenance body.For this reason, set video picture state or non-video picture state by for example controlling to imaging division supply or blocking developer.Specifically, reclaiming developer that video picture finishes, developer supplied with once more on the position of imaging division by mixer means, member is used in configuration movably blocking, carries out the supply or the blocking of developer, and display is switched between video picture state or non-video picture state.Compare with the cleaning balde that uses on the past display, in order to prevent double-colored above colour mixture, the function that developer is interdicted in this intercept member of developing agent requirement more completely.
In the intercept member of developing agent in past, use the felt be attached on the metal shaft etc. or rubber rollers etc.
But, use under the occasion of felt, exist developer and be full of felt, can not make problems such as blocking stable performance thereby shortage permanance.Use under the occasion of rubber rollers, it is bad to exist the blocking performance, problems such as residual toner or carrier on the video picture sleeve, but also exist endurance issues such as abrasion.
The present invention is in order to solve above-mentioned this problem, and purpose is to provide a kind of and has stable developer blocking performance, and the also good intercept member of developing agent of permanance such as abrasion performance.
Intercept member of developing agent of the present invention, by contacting with the video picture sleeve surface, to keep the developer blocking of body supply by the video picture sleeve to the electrostatic latent image of display, it is characterized in that, this intercept member of developing agent is composited by rubber elastomer and hard support, and this complex cures by jointing material and is bonded.
Another is characterised in that rubber elastomer contains fluoropolymer.Also have one and be characterised in that, the bonding agent that uses in the sulfuration adhesion is to be reacted with the high molecular at least a functional group that constitutes rubber elastomer by the vulcanizing agent that cooperates in the rubber elastomer to form.Another is characterised in that, it is that rubber, fluorine are that rubber, acrylonitrile butadiene are that rubber, polyurethane series rubber and ethylene, propylene are at least a in the rubber that rubber elastomer is selected from silicon.
Another is characterised in that the hard support is a metallic object.
Intercept member of developing agent of the present invention is characterized in that, with the contacted rubber elastomer of developer being supplied with on the electrostatic latent image maintenance body of video picture sleeve, its edge shape is radius-of-curvature 0.5 ± 0.2mm or is the right angle.
It is characterized in that, use duplicating machine or the laser printer of display for using double-colored above developer of intercept member of developing agent of the present invention.
Among the present invention, sulfuration adhesion is to instigate hard supports such as rubber elastomer and metallic object to make it that sulfuration or cross-linking reaction take place by jointing material, and hard supports such as rubber elastomer and metallic object are bonded into one securely.Said sulfuration adhesion is meant vulcanizing agent and bonding agent generation chemical bond that cooperates in the rubber elastomer for example or high molecular functional group and the bonding agent generation chemical bond that constitutes rubber elastomer, perhaps, these combinations takes place simultaneously.
The edge shape of rubber elastomer is that the right angle is meant that radius-of-curvature is lower than 0.01mm, preferably is lower than 0.001mm.
The hard support is meant to have the rigidity that can keep rubber elastomer edge part precision, even thermal deformation, parts that corrosion stability is good do not take place under the heat treatment temperature when being exposed to sulfuration adhesion in other words yet.
This rubber elastomer and hard support pass through the jointing material chemical adhesion together, thereby can obtain the good complex of bond strength, can obtain developer blocking stable performance, the also good intercept member of developing agent of while permanance.
Have, the radius-of-curvature of intercept member of developing agent and video picture sleeve contact portion is 0.5 ± 0.2mm or for the right angle, and is corresponding with developer of all kinds thus, and keeps the blocking performance that has good stability for a long time again.And, by in rubber elastomer, adding fluoropolymer, the sliding resistance when reducing blocking between video picture sleeve and the rubber elastomer.In addition, improve the partially rigid of rubber elastomer by making hard supports such as rubber elastomer and metallic object form complex, and significantly improve the throughput rate of intercept member of developing agent.
The shape of intercept member of developing agent of the present invention is described with Fig. 1.Fig. 1 is the sectional view of this intercept member of developing agent.Among Fig. 1,1 is rubber elastomer, and 2 is hard supports such as metallic object.And intercept member of developing agent and video picture sleeve are contacted that part of, are meant in rubber elastomer 1 not compound with hard support 2 that part of position, top.The radius-of-curvature at this position, top either party's angle is all 0.5 ± 0.2mm or is the right angle, makes the blocking stable performance of developer thus.Especially, radius-of-curvature is set at 0.5 ± 0.2mm, can be corresponding with versicolor developer, make the blocking stable performance.
Hard support of the present invention is considered the adverse effect of getting rusty to toner or carrier etc., if the material that is difficult to get rusty then can use.For example, can use resin or fiber-reinforced resin, pottery, aluminium alloy, stainless steel or iron such as mild steel etc. are implemented the electroplating part etc. of antirust processing.Herein, if selection can be saved machining period, inefficient antirust processing in manufacturing process, and have hard and a rigidity that the edge definition that do not make rubber elastomer reduces, even be exposed under the following heat of vulcanization treatment temperature and also do not have very big change in size such as bending, warpage, nor cause the material of metal erosion by getting rusty etc., the hard rigid support body of non-ferrous metal systems such as then preferred corrosion resistant plate, aluminium alloy plate.
Rubber elastomer of the present invention for example can be that the glass transition temperature of 2 grades of tr pts is lower than normal temperature (20～25 ℃), is positioned at-100～0 ℃ rubber-like elastic body particularly.As this material, preference such as silicon are that rubber, fluorine are that rubber, polyurethane series rubber, acrylonitrile butadiene are that rubber, ethylene, propylene are rubber etc., and they can use separately, also can be used as potpourri and use.Wherein, silicon is that ozone resistance, the rebound characteristics of rubber is good, is particularly suitable for the present invention.And, needing under the occasion of high rubbery intensity, acrylonitrile butadiene is that rubber, ethylene, propylene are that rubber is very suitable.Especially, ethylene, propylene is that rubber is suitable for being used at an easy rate industrial use.
The rubber hardness of these rubber elastomers if 60～80 ° of Hs (JIS-A) for example, then can form and has suitable flexible intercept member of developing agent, and be difficult to make object sliding material damaged, thereby be preferred.But, because this elastic body soft must determine more accurately that also toner and carrier are interdicted in the fixed position.Therefore, it is necessary having the decision that do not make the suitable stiff that this elastomeric edge definition reduces and the means of fixed position, becomes more important with compoundization of above-mentioned hard support.
At first, illustrate one of rubber elastomer of the present invention, be rubber as the silicon of silicon-type elastic body one example.
Silicon is that rubber is the organopolysiloxane class with high polymerization degree of siloxane bond (Si-O key), preferably has the material of rubber-like elasticity under the room temperature.Silicon is the molecular weight of rubber, and its number-average molecular weight preferably is about more than 50,000, because high as far as possible molecular weight can obtain good result, and more preferably more than 70,000, most preferably about 100,000～200,000.
As the silicon that meets above condition is the example of rubber, (for example can enumerate the poly dimethyl silicone elastomer, SHIN-ETSU HANTOTAI chemistry society system trade name: XE76), the methyl ethylene silicone elastomer (for example, east レ シ リ コ-system trade name: SH433 of Application society or chemistry society of SHIN-ETSU HANTOTAI system trade name: TSE201), the Methylphenylsilanone elastic body (for example, east レ シ リ コ-Application society system trade name: SE955U), fluorosilicone elastic body (for example, ダ ウ コ-ニ Application グ society system trade name: シ ラ ス テ
ィ ッNetwork LS).As silicone rubber compound, can enumerate ワ
ッカ-ケ ミ カ Le ズ イ-ス ト ア ジ ア society system trade name: エ ラ ス ト ジ Le EL5409.
Fluorine of the present invention is that rubber is polymkeric substance or the multipolymer that on average contains the unit cell of 1 above fluorine atom, glass transformation temperature is lower than room temperature, the material that preferably has rubber-like elasticity under the room temperature can adopt acquisitions such as for example bulk polymerization, suspension polymerization, emulsion polymerization, solution polymerization, catalyzed polymerization, ionizing radiation polymerization, redox polymerization.Fluorine is the molecular weight of rubber, and preferred number average molecular weight is about more than 50,000, because high as far as possible molecular weight can obtain good result, and more preferably more than 70,000, most preferably about 100,000～200,000.
As the example that meets above condition, (for example for example can enumerate the tetrafluoroethene propylene copolymer, Asahi Glass society system trade name: ア Off ラ ス), the vinylidene hexafluoropropylene copolymer (for example, clear and the electrician society of DuPont system trade name: バ イ ト Application), vinylidene hexafluoropropylene TFE copolymer (for example, テ Network ノ Off ロ Application), fluorosilicone based elastomers (for example, ダ ウ コ-ニ Application グ society system trade name: シ ラ ス テ モ Application テ Off Le オ ス society system trade name:
ィ ッNetwork LS), phosphocreatine based elastomers (for example, Off ァ イ ア ス ト-Application society system trade name: PNF), perfluor based elastomers (for example, ダ イ キ Application industry society system trade name: ダ イ エ Le パ-Off ロ) etc.
To be rubber (being designated hereinafter simply as NBR) be the multipolymer of butadiene and vinyl cyanide to acrylonitrile butadiene of the present invention, if it is just passable to have the material of rubber-like elasticity under the room temperature.Can use for example by the low content nitrile NBR of the acrylonitrile content less than 24% of copolymerization, 24～30% middle nitrile content NBR, 30～36% middle high-nitrile NBR, 36～42% high-nitrile NBR, high nitrile content NBR etc. above 42%.The preferred acrylonitrile content of the present invention does not destroy in the scope of caoutchouc elasticity, low temperature resistance, low-temperature characteristics when being in the abrasion performance that increases rubber, resistance to ag(e)ing, tensile strength, especially preferably contains the NBR of 24～42% nitrile content of having an appointment.
And, the molecular weight of NBR, its number-average molecular weight preferably is about more than 50,000, because high as far as possible molecular weight can obtain good result, more preferably more than 70,000, most preferably about 100,000～500,000.
As the example that meets above condition, for example can enumerate the synthetic go system society of Japan system trade name: JSR-220S, JSR-N, Japanese ゼ オ Application society system trade name: NIPOL, Goodyear corporate system trade name: CHEMIGUM etc.
Polyurethane series rubber of the present invention is meant the rubber-like elastic body that polyester polyol, polyether polyol, other many alcohols and polyisocyanates reaction obtain.As polyester polyol, the polyester polyol that polyprotonic acid (for example hexane diacid, succinic acid, decanedioic acid, phthalic acid, other aliphatics or aromatic binary carboxylic acid etc.) and polyhydric alcohol polymer (for example polyglycol, poly-diethylene glycol, polypropylene glycol, poly-dipropylene glycol, polytetramethylene glycol, other diol polymer, three alkoxide polymers etc.) reaction generates or the ring-opening polymerization polymer of cyclic ester etc. are arranged.There is no particular limitation for the molecular weight of polyhydric alcohol polymer herein, becomes suitable rubber-like elastic body in order to make it, and molecular weight is more suitable about 1000～3000.And because polyether polyol obtains epoxide or tetrahydrofuran ring opening polymerization, therefore, preferred polyether polyol is epoxide to be added on the compound with hydrogen atom that at least 2 these cyclic ethers can addition obtain.This epoxide is for example oxirane, epoxypropane, epoxy butane etc., has the compound that can add to the hydrogen atom on the cyclic ethers, for example above-mentioned polyhydric alcohol polymer, polyphenol, polyamide, polyamines etc., polyhydric alcohol polymer wherein, there is no particular limitation for its molecular weight, preferred polyglycol (about molecular weight 1000～6000), polypropylene glycol (about molecular weight 1000～2000), polytetramethylene glycol etc.And, other many alcohol can be for example butadiene homopolymer or with polybutadiene that the multipolymer of vinyl cyanide or styrene etc. constitutes be glycol, polyester polyol, the many alcohol of polycarbonate etc.In addition, polyisocyanates is aliphatics or aromatic isocyanate, must be the polyisocyanates that has functional groups such as isocyanate group more than at least 2 or protected isocyanate group.But, owing to the many more easy more crosslinked caoutchouc elasticities of losing of functional group, therefore, preference such as hexa-methylene-1,6-diisocyanate, Toluene-2,4-diisocyanate, 4 diisocyanate, metaphenylene diisocyanate, naphthalene-1,5-diisocyanate, diphenyl methane-4,4 '-diisocyanates such as diisocyanate.
This polyurethane series rubber can be for example to add 1 in the prepolymer that is made of various many alcohol and polyisocyanates, crosslinking chemicals such as 4-butylene glycol, di-2-ethylhexylphosphine oxide dichloroaniline, trimethylolpropane, triisopropanolamine make its crosslinked product, perhaps also can use by the many alcohol of two functional groups that constitute soft segment, constitute the short-chain diol of rigid chain segment and the polyurethane series thermoplastic elastomer that diisocyanate three combination of components form segmented copolymer.
As the example that meets above condition, can enumerate for example TSE society system trade name: ミ ラ Network ト ラ Application E270PEND etc.
Ethylene, propylene of the present invention be rubber can enumerate make ethene and the propylene EP rubbers that polymerization is made in varsol (below, abbreviate EPM as) or in ethene and propylene, add a spot of the 3rd component for example ethylidene norbornene, dicyclopentadiene, 1, the propylene diene rubber (being designated hereinafter simply as EPDM) that polymerizations such as 4-hexadiene are made etc.
As the example that meets above condition, can enumerate for example system trade name: the JSREP33 etc. of the synthetic go system society of Japan.
Total use level of various filling agents in the above-mentioned rubber elastomer with respect to rubber elastomer 100 weight portions, can cooperate 0.1～200 weight portion, preferred 10～100 weight portions, more preferably 30～60 weight portions.For intercept member of developing agent being made the formed body of caoutchouc elasticity appropriateness, total use level of filling agent is lower than 50 weight %, is preferably 10～40 weight %.As filling agent, can enumerate reinforcing agents such as inorganic silicon compounds such as fluoropolymer or silica powder, carbon black, graphite, paraffin or lubricant, processing aid, antioxidant, antiaging agent, vulcanizing agent, vulcanization accelerator etc.Powdered filling agent is for example mean grain size 0.1～50 μ m, preferred 1～25 μ m.
Especially, should select to use such vulcanizing agent and vulcanization accelerator, can be when cross-linking reaction form rubber elastomer, the jointing material reaction with selecting according to rubber elastomer makes hard supports such as rubber elastomer and metal be bonded together securely thus.
And graphite such as carbon black are filling agent, and abrasion performance is improved, and are being effective filling agents aspect the rubber hardness of setting appropriateness (for example Hs65～75 °).As this filling agent, for example can enumerate the MT カ-ボ Application N990 that can buy from white stone カ Le シ ウ system society etc.Filling agents such as carbon black with respect to rubber elastomer 100 weight portions, can cooperate 1～20 weight portion, preferred 3～15 weight portions.
Jointing material of the present invention is to make the high molecular at least a functional group of above-mentioned vulcanizing agent or vulcanization accelerator and formation rubber elastomer that chemical reaction take place, while and the material that the hard support is bonded together securely, can select according to the kind of rubber elastomer.And vulcanizing agent or vulcanization accelerator preferably cooperate at least more than one, and its cooperation ratio with respect to rubber elastomer 100 weight portions, can cooperate 0.1～20 weight portion, preferred 0.1～10 weight portion.When vulcanizing agent was very few, sulfuration was carried out slow and insufficient, can not get cohesive, crossed and destroyed elastomeric character at most sometimes.The below combination of explanation vulcanizing agent and jointing material.
As silicon is the vulcanizing agent of rubber, can enumerate benzoyl peroxide, 2,4-dichlorobenzoperoxide, cumyl peroxide, tert-butyl hydroperoxide cumene, 2,4-dimethyl-2, organic peroxide sulfuration agent such as 5-di-t-butyl hexane peroxide, di-tert-butyl peroxide.For example can enumerate 2 particularly, 4-dimethyl-2, the vulcanizing agent (ワ that 5-di-t-butyl hexane peroxide dimethyl such as (50%)-hexane system constitutes
ッカ-ケ ミ カ Le ズ イ-ス ト ア ジ ア society system trade name: DS-8).This vulcanizing agent is rubber 100 weight portions for silicon, can cooperate for example 0.1～5 weight portion, and preferred 0.1～3 weight portion more specifically is about 0.8 weight portion.
As silicon is the jointing material of rubber, and can enumerate reactive organo-silicon compound, organopolysiloxane or the organic hydride diene polysiloxane etc. that organoalkoxysilane or organic alkoxy polyorganosiloxane resin and organic titanate are host is reactive organo-silicon compound of host etc. with platinum group catalyst.And, can enumerate reactive organo-silicon compound that contain the reactive silicon hydride compounds etc.Herein, organoalkoxysilane or organic alkoxy polyorganosiloxane resin, preferably have the alkoxy that combines with at least one silicon atom, also contain addition reactivity, condensation reaction functional groups such as methacryloxy, vinyl, allyl, amino, sulfydryl, epoxy radicals.Can enumerate the reactive organo-silicon compound that for example contain the reactive silicon hydride compounds (the シ リ コ of SHIN-ETSU HANTOTAI-Application society system trade name: プ ラ イ マ-24T) particularly.
Reactive organo-silicon compound are dissolved in the organic solvent, are applied on the surface of sheet metal etc. and make its drying, form bonding material layer thus.Then, by making the bonding sulfuration of silicon rubber, obtain the complex of silicon rubber and sheet metal.Silicon rubber and reactive organo-silicon compound are respectively organo-silicon compound, owing to be homologous series, favourable to cohesive.
In addition, utilize the jointing material of reactive organo-silicon compound, also can be used for other crosslinked rubber elastomers of vulcanizing agent well.Have again, can improve bounding force with sheet metal by reacting with the high molecular functional group that constitutes rubber elastomer.Reactive organo-silicon compound are because excellent heat resistance can tolerate following heat treated temperature fully.
As fluorine is the vulcanizing agent of rubber, can enumerate magnesium oxide (MgO), calcium hydroxide (Ca (OH)
2) wait metal oxide or metal hydroxides.With respect to fluorine is rubber 100 weight portions, can cooperate for example about magnesium oxide 3 weight portions, calcium hydroxide 6 weight portions.
As fluorine is the jointing material of rubber, can enumerate reactive organo-silicon compound etc.Can enumerate for example ケ system ロ particularly
ッNetwork 607 (ロ-De Off ア-イ-ス ト イ Application コ-Port レ イ テ
ッDe society system trade name).Reactive organo-silicon compound also are when vulcanizing with vulcanizing agent and fluorine is rubber reaction itself.
As NBR and ethylene, propylene is the vulcanizing agent of rubber, can enumerate the sulphur powder.And under the occasion of NBR, preferred vulcanizing agent uses with vulcanization accelerator, as preferred vulcanization accelerator, can enumerate tetramethyl thiuram disulfide, 2-mercaptobenzothiazole etc.Use level is under the occasion of NBR, with respect to the NBR100 weight portion, can cooperate 0.1～5 weight portion vulcanizing agent, about preferred particularly sulphur powder 0.5 weight portion, tetramethyl thiuram disulfide 2 weight portions, 2-mercaptobenzothiazole 2 weight portions.Ethylene, propylene is under the occasion of rubber, for the EPDM100 weight portion, can cooperate 0.1～5 weight portion vulcanizing agent, preferably cooperates sulphur powder 1.5 weight portions particularly.
As NBR and ethylene, propylene is the jointing material of rubber, can enumerate for example ケ system ロ
ッNetwork 205, ケ system ロ
ッNetwork 220 (is all ロ-De Off ア-イ-ス ト イ Application コ-Port レ イ テ
ッDe society system trade name).These ケ system ロ
ッNetwork 205, Network system ロ
ッNetwork 220 is considered to and can reacts with vulcanizing agent and vulcanization accelerator.
As the vulcanizing agent of polyurethane series rubber, can use the organic peroxide sulfuration agent.For example can enumerate パ-ヘ キ サ 3M (Japanese grease society system trade name) particularly.And, preferably use vulcanization accelerators such as tetramethyl thiuram disulfide simultaneously.Use level is with respect to polyurethane series rubber 100 weight portions, can cooperate for example 0.1～3 weight portion, about preferred particularly パ-ヘ キ サ 3M 0.5 weight portion, tetramethyl thiuram disulfide 1 weight portion.
As the jointing material of polyurethane series rubber, can enumerate for example ケ system ロ
ッNetwork 205, ケ system ロ
ッNetwork 218 (is all ロ-De Off ア-イ-ス ト イ Application コ-Port レ イ テ
ッDe society system trade name).Under this occasion, with ケ system ロ
ッNetwork 205 is applied to and makes its drying on the metal surface, is coated with ケ system ロ then thereon
ッNetwork 218 forms bonding material layer thus.
In addition, the coating process of jointing material can use for example brushing, infusion process, spraying rubbing method etc., brushes goodly aspect the raw material setup of jointing material, is preferable methods.And if the viscosity of jointing material is 0.1～500cp (20～25 ℃), stream of liquid droplets etc. then can not take place in preferred 50～300cp (20 ℃～25 ℃), can not cross sticking during coating yet and be difficult to coating, because coating viscosity appropriateness, thereby be preferred.And, after the coating, air-dry dry 1～60 minute, perhaps at 60～150 ℃, preferred 100～150 ℃ of following dryings 1～30 minute.Particularly, as the metallic object of one of hard support and the complex method of rubber elastomer is to select bonding agent according to elastomeric kind in advance, it is applied on the metallic object and makes the rubber elastomer sulfidization molding, at this moment, in moulding, carry out bonding and compound change.The curing temperature condition is, for example under certain pressure, in 120～280 ℃ of scopes, do not make the rubber elastomer thermal deformation, can keep under the temperature of edge dimensional accuracy and implement thermal treatment.In addition, under this occasion, rubber elastomer not only, and be used for the hard support that is combined into one with rubber elastomer, even be subjected to certain pressure and heating, can not bend, the warpage equidimension changes, and has good flatness etc. yet, can keep dimensional accuracy, this equally also is necessary.Therefore, sulfidization molding can only once vulcanize, and also can once carry out post-cure again after the sulfuration, and this is a preferable methods for the characteristic that improves intercept member of developing agent.For example, once sulfuration was descended 1～100 minute at 140～190 ℃, and preferred 5～60 minutes, pressurized conditions was for example 0.1～10MPa (1～102kgf/cm
2), preferred 0.1～5MPa (1～51kgf/cm
2), more preferably 0.5～3MPa (5.1～30.6kgf/cm
2) condition, post-cure, 150～280 ℃ 0.1～24 hour down, preferred 1～16 hour, preferably according to rubber elastomer 1～10 hour, do not have under the condition of pressurization and carry out.Under this occasion, the bond strength of rubber elastomer and metallic object, when with the bond strength of post-cure as 100% the time, once Liu Hua state demonstrates about cohesive of about 70～80%.In addition, think that above-mentioned jointing material has under the very sufficient occasion of bond strength, cohesive, omit the post-cure operation, only adopt a vulcanization process to keep cohesive.And the thickness of jointing materials such as bonding agent is 0.3～300 μ m, and when being preferably 1～100 μ m left and right sides, it is bonding to obtain good whole.
Among the present invention, the fluoropolymer that cooperates in the rubber elastomer can use tetrafluoroethylene resin (being designated hereinafter simply as PTFE) maybe can carry out injection molding various fluororesin.
The friction factor of PTFE is low, Abherent is good, it can be high molecular or low-molecular-weight any, can enumerate for example Mitsui DuPont Off ロ ロ ケ ミ カ Le society system trade name: テ Off ロ Application 7J, ダ イ キ Application industry society system trade name: Port リ Off ロ Application M-15, Le Block ロ Application L-2, Asahi Glass society system trade name: Off Le オ Application G163, L169, like many village communities trade name: KTL610, KT400H, KT8N, DuPont corporate system trade name: バ イ ダ
ッNetwork ス AR etc.
And, can carry out injection molding fluororesin, be preferably from tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (being designated hereinafter simply as PFA), hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-perfluoroalkyl vinyl ether multipolymer (being designated hereinafter simply as EPE), tetrafluoraoethylene-hexafluoropropylene copolymer (being designated hereinafter simply as FEP), tetrafluoroethylene-ethylene copolymer (being designated hereinafter simply as ETFE), trifluorochloroethylene multipolymer (being designated hereinafter simply as CTFE), trifluorochloroethylene-ethylene copolymer (being designated hereinafter simply as ECTFE), more than one polymkeric substance of selecting in polyvinyl fluoride (being designated hereinafter simply as PVF) and the Kynoar (being designated hereinafter simply as PVDF).
Above-mentionedly carry out injection molding fluororesin, can in the fabrication phase, adopt various polymerization methodses such as catalytic emulsion polymerization, suspension polymerization, catalytic solution polymerization, vapour phase polymerization and ionizing radiation polymerization.Number-average molecular weight (Mn) preferably is lower than 5 * 10
4, preferred especially 5 * 10
3～2 * 10
4
Fluororesin example as the injection moldable that meets this condition, as PFA, can enumerate system trade name: the PFA of Mitsui DuPont Off ロ ロ ケ ミ カ Le society, MP10, as FEP, can enumerate Mitsui DuPont Off ロ ロ ケ ミ カ Le society system trade name: テ Off ロ Application FEP100J, as ETFE, can enumerate Asahi Glass society system trade name: ア Off ロ Application COP, as CTFE, can enumerate ダ イ キ Application industry society system trade name: ネ オ Off ロ Application CTFE, as PVDF, can enumerate Wu Yu chemistry society system trade name: KF Port リ マ-, as PVF, can enumerate Dupont corporate system trade name: Tedlar etc.
ETFE is preferred at sliding properties with aspect the mouldability two of rubber elastomer.Should illustrate that fluoropolymer is a main chain by-(CF at least
2-CF
2)
n-constitute, thisly partly account for main chain 30～100 weight % by tetrafluoroethene, the tetrafluoroethene that preferred 48～100 weight % constitute is a fluororesin, because Abherent, low frictional properties etc. are good, thereby preferred.This tetrafluoroethene is a fluororesin because the shared ratio height of fluorine around the carbon skeleton, and sliding properties such as low-friction coefficient are good, as this compound, can enumerate PTFE, PFA, FEP, EPE, ETFE etc.
The use level of fluoropolymer in rubber elastomer for rubber elastomer 100 weight portions, is 10～80 weight portions, is preferably 10～50 weight portions, more preferably 10～30 weight portions.During less than 10 weight portions, then can not give play to the effect that reduces sliding resistance, and when surpassing 80 weight portions, then elastic property is destroyed.
And the inorganic silicon compound that can use in the present invention is compounds such as silicon dioxide, silit, silicon nitride, and there is no particular limitation for its shape, can be spherical, granular, needle-like etc. any.Its mean grain size is 1～25 μ m, is preferably 5～20 μ m.During less than 1 μ m, then easily produce aggegation etc., dispersed variation has adverse effect to abrasion performance, lubricity, during greater than 25 μ m, then damages object video picture sleeve surface, is not preferred.Wherein, be Cab-O-sil to object video picture sleeve surface aggressive minimum as silicon dioxide, we can say that Cab-O-sil is most preferred.As this Cab-O-sil, can enumerate system trade name: the サ イ リ シ ア 470 etc. of the シ リ シ ア of Fuji chemistry society.
In addition, as the rubber elastomer that cooperates inorganic silicon compound, for the silicon of one of silicon-type elastic body is rubber, the conformability between the homologous series element is also good.And the use level of inorganic silicon compound in rubber elastomer for rubber elastomer 100 weight portions, is 1～50 weight portion, preferred 3～30 weight portions.During inorganic silicon compound less than 1 weight portion, then abrasion performance is poor, and when surpassing 50 weight portions, then the intensity of rubber elastomer reduces.General rubber mix method can be used with the mixed method of rubber elastomer, kneader, closed mixing machine, roller etc. can be enumerated.
Like this, the rubber elastomer that is combined with fluoropolymer or inorganic silicon compound demonstrates good sliding properties, Abherent, and, hard support and rubber elastomer bonding, even be combined with fluoropolymer or inorganic silicon compound, vulcanizing treatment that also can be by jointing material etc. suitably is bonded into one two kinds of materials.
Find out from above, intercept member of developing agent of the present invention, number of revolutions at the video picture sleeve is for example 1～500rpm, under the service condition of preferred 1～300rpm, perhaps the extruding force on cut-off component is for example 0.1～25N (10.2～2550gf), preferred 1～10N (uses under 102～1020gf) the service condition, also can keep good barrier property.
Embodiment 1～6 and comparative example 1～3
The material that illustrates below the use is formed, and cooperates after each component in the cooperation ratio shown in the table 1, and is mixing with the roller mixing roll, by sulfuration adhesion, obtains intercept member of developing agent.Should illustrate, each the set of dispense composition and division in a proportion example shown in the table 1 be weight portion,
1. rubber elastomer
1) silicon rubber: エ ラ ス ト ジ Le EL5409 (ワ
ッカ-ケ ミ カ Le ズ イ-ス ト ア ジ ア society system trade name)
2) fluororubber: テ Network ノ Off ロ Application FOR5351 (モ Application テ Off Le オ ス society system trade name)
3) urethane rubber: ミ ラ Network ト ラ Application E270PEND (TSE society system trade name)
4) NBR:JSR220S (the synthetic go system society of Japan system trade name)
5) EPDM:JSREP33 (the synthetic go system society of Japan system trade name)
2. jointing material
1) priming paint No.24T (the シ リ コ of SHIN-ETSU HANTOTAI-Application society system trade name), viscosity 135cp (25 ℃)
2) ケ system ロ
ッNetwork 205,218,220,607 (is all ロ-De Off ア-イ-ス ト イ Application コ-Port レ イ テ
ッDe society system trade name)
3. fluoropolymer
1) PTFE: Off Le オ Application L182J (Asahi Glass society system trade name)
2) ETFE: ア Off ロ Application COPZ8820 (Asahi Glass society system trade name)
4. other filling agents:
1) Cab-O-sil (SiO
2): サ イ リ シ ア 470 (the シ リ シ ア of Fuji chemistry society system trade name), mean grain size 12 μ m
2) carbon black: MT カ-ボ Application N990 (Bai Shi カ Le シ ウ system society system trade name)
3) vulcanizing agent: DS-8 (ワ
ッカ-ケ ミ カ Le ズ イ-ス ト ア ジ ア society system trade name)
パ-ヘ キ サ 3M (Japanese grease society system trade name)
Should illustrate that the adjuvant that processing aid, antiaging agent etc. are necessary adds according to each elastic body, adjust addition, so that composition hardness is 70 ° (JIS-A).
And, all under a conditions of vulcanization shown in the table 1, post-cure condition, carry out moulding at embodiment and comparative example, the metal position of shape shown in Figure 1 is the semicircle shape of diameter 6mm, long 200mm, rubber elastomer is thick 1mm * long 8mm * wide 200mm, and making blocking portion is the intercept member of developing agent shown in the table 1.The hard support of this moment uses stainless steel SUS304, carries out sulfuration adhesion when caoutchouc elasticity is body formed.And it is bonding that comparative example 1 usefulness felt replaces rubber elastomer to carry out, and makes test film.Should illustrate that the pressurized conditions when bonding is once to vulcanize extruding force 1Mpa (10.2kgf/cm 10 minutes
2), post-cure is 16 hours in embodiment 3, other are 4 hours, carry out preheating.
The intercept member of developing agent that adopts following method evaluation to obtain.
Prepare the video picture sleeve of the diameter 20mm that makes with stainless steel SUS304 on a surface, in the container of filling the developer that contains toner and carrier, make developer and video picture sleeve that the video picture sleeve is rotated.Make intercept member of developing agent contact to interdict and remove developer with the video picture upper cartridge surface that is rotating.At first, the initial stage condition is, uses original intercept member of developing agent, measures the blocking of developer and removes degree.Then, the video picture sleeve is heated to 60 ℃ with the axle type of heating,, removes test, made cut-off component contact 1.25 seconds with sleeve in per 10 seconds Yi Bian carry out continuous 10 hours developer blocking on one side it is rotated.After 10 hours, under the condition identical, measure the degree that the developer blocking is removed with the initial stage condition.Degree by following 4 grade evaluation developers blocking is removed the results are shown in table 1.In addition, the friction torque of the abrasion value of measuring the intercept member of developing agent after 10 hours when contacting is shown in Table 1.
A: toner, carrier is neither remains on the video picture sleeve,
B: the toner small amount of residual, but carrier does not remain on the video picture sleeve.
C: toner, carrier all small amount of residual on the video picture sleeve.
D: toner, carrier remain on the video picture sleeve all quite a lot ofly.
Should illustrate, squeeze pressure during blocking from the cut-off component both sides with the extruding of the power of each 2.5N (255gf), integral body is applied squeeze pressure about about 5N (510gf), the number of revolutions of video picture sleeve is 100rpm, and used developer is the system カ ラ-レ of キ ャ ノ Application society-ザ-yellow developer of コ ピ-300.
Table 1
| The example project | Embodiment | Comparative example *1 | ||||||||
| ?1 | ?2 | ?3 | ?4 | ?5 | ?6 | ?1 | ?2 | ?3 | ||
| Proportioning (weight portion) silicon is rubber | ?100 | ?100 | ?- | ?- | ?- | ?- | ?- | ?100 | ?- | |
| Fluorine is a rubber | ?- | ?- | ?100 | ?- | ?- | ?- | ?- | ?- | ?100 | |
| Polyurethane series rubber | ?- | ?- | ?- | ?100 | ?- | ?- | ?- | ?- | ?- | |
| ????NBR | ?- | ?- | ?- | ?- | ?100 | ?- | ?- | ?- | ?- | |
| ????EPDM | ?- | ?- | ?- | ?- | ?- | ?100 | ?- | ?- | ?- | |
| ????PTFE | ?15 | ?15 | ?10 | ?15 | ?15 | ?15 | ?- | ?- | ?- | |
| ????ETFE | ?- | ?- | ?10 | ?10 | ?10 | ?10 | ?- | ?- | ?- | |
| Cab-O-sil | ?20 | ?20 | ?- | ?5 | ?5 | ?5 | ?- | ?- | ?- | |
| Carbon black | ?10 | ?10 | ?10 | ?5 | ?5 | ?5 | ?- | ?- | ?- | |
| The vulcanizing agent vulcanization accelerator | *3 | *3 | *4 | *5 | *6 | *7 | ?- | *3 | *4 | |
| Jointing material | *8 | *8 | *9 | *10 | *11 | *11 | ?- | *8 | *9 | |
| Condition of molding once vulcanize (℃) | ?170 | ?170 | ?165 | ?160 | ?160 | ?160 | ?- | ?170 | ?165 | |
| Post-cure (℃) | ?200 | ?200 | ?250 | ?170 | ?- | ?- | ?- | ?200 | ?250 | |
| Edge shape | The right angle | ?0.5 *2 | The right angle | The right angle | The right angle | The right angle | ?- | The right angle | The right angle | |
| Characteristic blocking performance | Initial stage | ?A | ?B | ?A | ?B | ?B | ?B | ?B | ?B | ?B |
| After 10 hours | ?A | ?B | ?A | ?B | ?B | ?B | ?D | ?D | ?C | |
| Abrasion value (mg) | ?4.5 | ?3.8 | ?4.0 | ?7.4 | ?7.7 | ?8.2 | ?- | ?16.7 | ?14.6 | |
| Friction torque (Ncm) | ?0.35 | ?0.38 | ?0.30 | ?0.42 | ?0.43 | ?0.45 | ?0.57 | ?1.24 | ?1.06 | |
Annotate:
*1: comparative example 1 usefulness felt replaces rubber elastomer.
*2: radius-of-curvature, mm
*3:DS-8,0.8 weight portion
*4: magnesium oxide 3 weight portions+calcium hydroxide 6 weight portions
*5: パ-ヘ キ サ 3M 0.5 weight portion+tetramethyl thiuram disulfide 1 weight portion
*6: sulphur powder 0.5 weight portion+tetramethyl thiuram disulfide 2 weight portions+2-mercaptobenzothiazole 2 weight portions
*7: sulphur powder 1.5 weight portions
*8: priming paint-24T
*9：ケムロ
ック607
*10：ケムロ
ック205+ケムロ
ック218
*11：ケムロ
ック205+ケムロ
ック220
As seen from Table 1, compare the developer of embodiment 1～6 blocking performance, all good with the frictional behaviour of video picture sleeve etc. with comparative example 1～3.
In addition, use the intercept member of developing agent of embodiment 1～6, measure the developer blocking performance to yellow developer, the intercept member of developing agent of embodiment 2 demonstrates optimum performance.
Intercept member of developing agent of the present invention is composited by rubber elastomer and hard support, and this complex cures by jointing material and is bonded together, therefore, the bond strength height, complex forms one, demonstrates stable developer blocking performance.
In addition, rubber elastomer contains fluoropolymer, can obtain thus to wear away less, permanance is good, the little intercept member of developing agent of frictional resistance during blocking.
In addition, it is that rubber, fluorine are that rubber, acrylonitrile butadiene are that rubber, polyurethane series rubber and ethylene, propylene are at least a in the rubber that rubber elastomer is selected from silicon, the vulcanizing agent that cooperates in these rubber elastomers and constitute the high molecular at least a functional group and jointing material reaction of rubber elastomer can obtain above-mentioned developer thus and interdict performance, intercept member of developing agent that permanance is better.
Intercept member of developing agent, with the edge shape of the contacted rubber elastomer of video picture sleeve, its radius-of-curvature is 0.5 ± 0.2mm or is the right angle, can obtain thus and the corresponding intercept member of developing agent of each color.Therefore, the intercept member of developing agent of acquisition is specially adapted to duplicating machine or the laser printer that display uses double-colored above developer.
Fig. 1 is the sectional view of intercept member of developing agent.
Symbol description
1: rubber elastomer
2: the hard support
Claims (7)
1. one kind by contacting with the video picture sleeve surface, the intercept member of developing agent that will interdict by the developer that the video picture sleeve is supplied with on the electrostatic latent image maintenance body of display, it is characterized in that, this intercept member of developing agent is composited by rubber elastomer and hard support, and this complex cures by jointing material and is bonded.
2. the intercept member of developing agent described in the claim 1 is characterized in that, above-mentioned rubber elastomer contains fluoropolymer.
3. the intercept member of developing agent described in the claim 1 or 2 is characterized in that, above-mentioned bonding agent is to be reacted with the high molecular at least a functional group that constitutes above-mentioned rubber elastomer by the vulcanizing agent that cooperates in the above-mentioned rubber elastomer to form.
4. the intercept member of developing agent of claim 1～3 described in each is characterized in that, it is that rubber, fluorine are that rubber, acrylonitrile butadiene are that rubber, polyurethane series rubber and ethylene, propylene are at least a in the rubber that rubber elastomer is selected from silicon.
5. the intercept member of developing agent of claim 1～4 described in each is characterized in that above-mentioned hard support is a metallic object.
6. the intercept member of developing agent of claim 1～5 described in each is characterized in that, with the contacted above-mentioned rubber elastomer of above-mentioned video picture sleeve, its edge shape is radius-of-curvature 0.5 ± 0.2mm or is the right angle.
7. the intercept member of developing agent described in the claim 6 is characterized in that, above-mentioned display is for using the duplicating machine or the laser printer of double-colored above developer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP343881/97 | 1997-11-28 | ||
| JP9343881A JPH10213971A (en) | 1996-11-28 | 1997-11-28 | Developer-isolating member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1218920A true CN1218920A (en) | 1999-06-09 |
Family
ID=18364965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98115601 Pending CN1218920A (en) | 1997-11-28 | 1998-06-29 | Intercept member of developing agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1218920A (en) |
-
1998
- 1998-06-29 CN CN 98115601 patent/CN1218920A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1081142C (en) | Wiper blade and method for production thereof | |
| JP3494039B2 (en) | Silicone rubber composition for heat fixing roll and heat fixing roll | |
| US7658387B2 (en) | Reinforced elastomeric seal | |
| JP4873120B2 (en) | Oil seal | |
| CN1295278C (en) | Concuctive polyurethane compound and conductive roller, charged roller, developing roller and transfer roller using said compound | |
| JP4820161B2 (en) | Manufacturing method of blade for electrophotographic apparatus and blade for electrophotographic apparatus | |
| CN101055454A (en) | Rubber roller for image-forming apparatus | |
| JP2022071172A (en) | Developing roller and manufacturing method therefor | |
| JP2971923B2 (en) | Lubricating rubber composition | |
| JP2006023725A (en) | Conductive roller and image forming device equipped therewith | |
| CN1218920A (en) | Intercept member of developing agent | |
| JP2005352181A (en) | Conductive roller and image forming apparatus equipped therewith | |
| JP2006023728A (en) | Conductive roller and image forming device equipped therewith | |
| JPH08231165A (en) | Guide shoe | |
| JP3017257B2 (en) | Lubricating rubber composition | |
| JP2006023727A (en) | Conductive roller and image forming device equipped therewith | |
| JP2005134840A (en) | Conductive belt and manufacturing method of conductive belt | |
| JP4606068B2 (en) | Charging roller and image forming apparatus having the same | |
| JPH08190270A (en) | Fitting structure of roller axis in developing device | |
| CN1786842A (en) | Toner transport roller | |
| JP4571442B2 (en) | Charging roller and image forming apparatus having the same | |
| US11774875B2 (en) | Development roll for electrophotographic apparatuses | |
| JPH10213971A (en) | Developer-isolating member | |
| JP2005352175A (en) | Conductive roller and image forming apparatus equipped therewith | |
| JP2006023726A (en) | Conductive roller and image forming device equipped therewith |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |