CN1867872A - Conductive rubber roller and process for producing the same - Google Patents
Conductive rubber roller and process for producing the same Download PDFInfo
- Publication number
- CN1867872A CN1867872A CNA2004800305983A CN200480030598A CN1867872A CN 1867872 A CN1867872 A CN 1867872A CN A2004800305983 A CNA2004800305983 A CN A2004800305983A CN 200480030598 A CN200480030598 A CN 200480030598A CN 1867872 A CN1867872 A CN 1867872A
- Authority
- CN
- China
- Prior art keywords
- layer
- resistance value
- rubber
- ionic conductivity
- electron conduction
- 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
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- 229910019142 PO4 Inorganic materials 0.000 description 1
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- BKGXZJOLCXNURM-UHFFFAOYSA-N S(=O)=N.C1(CCCCC1)SN Chemical class S(=O)=N.C1(CCCCC1)SN BKGXZJOLCXNURM-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
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- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
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- KBLZDCFTQSIIOH-UHFFFAOYSA-M tetrabutylazanium;perchlorate Chemical compound [O-]Cl(=O)(=O)=O.CCCC[N+](CCCC)(CCCC)CCCC KBLZDCFTQSIIOH-UHFFFAOYSA-M 0.000 description 1
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical compound CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/1665—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
- G03G15/167—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer
- G03G15/1685—Structure, details of the transfer member, e.g. chemical composition
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
- G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers
- G03G15/0233—Structure, details of the charging member, e.g. chemical composition, surface properties
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
A conductive rubber roller exhibiting an excellent stability in charging and transferring and being remarkably low in dependence of resistance on the environment and voltage, and a process for producing the same. The conductive rubber roller comprises a rubber layer formed on a supporting shaft (13), and including a base layer (11) of an ion conductive rubber layer and a surface layer (12) of an electron conductive polymer layer having a surface resistance lower than that of the ion conductive rubber layer, characterized in that the ratio (A)/(B) between the surface resistance (A) of the ion conductive rubber layer and the surface resistance (B) of the electron conductive polymer layer is set in the range of 1<(A)/(B)<=100. A process for producing the conductive rubber roller is also provided. Preferably, the surface layer (12) has a thickness of 5-40 mum.
Description
Technical field
The present invention relates to be suitable for electrophotographic copier or image forming apparatus such as printer, fax, have good charged, conducting rubber roller and manufacture method thereof that transfer printing is stable.
Background technology
In the past, in the conducting rubber roller that uses in the image forming apparatus such as electrophotographic copier or printer, fax, usually use by contain carbon, metal oxide waits the electron conduction rubber of giving electric conductivity, perhaps waits the ionic conductivity rubber of giving electric conductivity by containing ionic substance.
For electron conduction rubber, because the general difficulty of the dispersion of conductive materials such as carbon or metal oxide, therefore, and the resistance value when resistance value during low impressed voltage and high impressed voltage poor, that is, voltage-dependent has the tendency of raising.
On the other hand, for ionic conductivity rubber, because the dispersion ratio of ionic substance is easier to, so the voltage-dependent of resistance value can be little than electron conduction rubber.But, have ehter bond or ester bond in the ionic conductivity rubber, the whole water wettability that shows of rubber.Like this, particularly under hot and humid environment, because suction, resistance value has the tendency of rising, on the contrary under the low temperature and low humidity environment, because rubber is by dry, and the dissociated ion density loss of charge carrier, so ionic conductivity descends, resistance value rises.That is, for ionic conductivity rubber, the environmental factor dependence of resistance value easily increases.During situation that resistance value in the low temperature and low humidity environment rises, produce problems such as image color is thin out.
Method as the environmental factor dependence of the resistance value of improving rubber rollers, in patent documentation 1, disclose the superficial layer that makes the ionic conductivity elastomer layer and be dispersed with the electron conduction material and stacked gradually on the electric conductivity support, and this superficial layer is the charged roller of filming that forms by electrostatic coating.
The target that above-mentioned charged roller will reach is, by having on the absorptive ionic conductivity elastomer layer by the no absorptive superficial layer of electrostatic coating formation, like this, the environmental factor dependence of resistance value is suppressed at ± 1 figure place in, thereby no matter how environment changes, and all can keep stable charged current potential for a long time.But environmental factor dependence still changes greatly with interior in ± 1 figure place, and the problem that image is thin out or thicken can take place when environmental change is big.
On the other hand, live part is disclosed in patent documentation 2, wherein be laminated with conductive elastic layer and coating at least, this conductive elastic layer is that main body constitutes by the resilient material of the medium resistance with ionic conduction mechanism, this coating is on this elastic layer, and contacted by electrified body with this, and it is surface treated, the conductive agent that contains, and adjusted the resistance of this elastic layer and this coating by following requirement, promptly, add-50V～-during the DC voltage of 1000V, this elastic layer and the resistance value between this coating when measuring voltage for-50V are designated as R1, this elastic layer and the resistance value between this coating when measuring voltage for-1000V are designated as R2, and when R1 〉=R2, the rate of change A of the resistance value between this elastic layer and this coating is R1/R2, satisfy A less than 100, and make this elastic layer when measuring voltage satisfied with 8 * 10 with the resistance value R1 between this coating for-50V
7Ω.But in the above-mentioned charged part, the resistance value R1 between elastic layer and the coating for example is 8 * 10
7During Ω, because the resistance value between elastic layer and the coating is big, if even the thickness heterogeneity of coating has only slightly, then the resistance value of roller integral body becomes big, therefore lacks and makes stability.
[patent documentation 1] Jap.P. spy opens the 2000-352857 communique
[patent documentation 2] Jap.P. spy opens the 2002-229300 communique
The announcement of invention
The problem that invention will solve
The purpose of this invention is to provide and solve above-mentioned problem, environmental factor dependence, the voltage-dependent of resistance value are all significantly little, have good charged, conducting rubber roller and manufacture method thereof that transfer printing is stable.
Solve the method for problem
The present invention relates to conducting rubber roller, this conducting rubber roller is the conducting rubber roller that is formed with rubber layer at supporting axis, the superficial layer that this rubber layer contains the basic unit that formed by the ionic conductivity rubber layer, formed by the electron conduction polymeric layer with sheet resistance value low than this ionic conductivity rubber layer, it is characterized in that the ratio (A)/(B) of the sheet resistance value (B) of the sheet resistance value of ionic conductivity rubber layer (A) and electron conduction polymeric layer is set in 1＜(A)/(B)≤100 the scope.
In addition, the thickness of superficial layer is preferably 5 μ m～40 μ m.
Electron conduction polymeric layer used among the present invention is better formed by the fluororesin that contains carbon or metal oxide.
The invention still further relates to the manufacture method of conducting rubber roller, this manufacture method is to make the method for following conducting rubber roller, promptly, be formed with the conducting rubber roller of rubber layer at supporting axis, this rubber layer contains the basic unit that is formed by the ionic conductivity rubber layer, the superficial layer that forms by electron conduction polymeric layer with sheet resistance value low than this ionic conductivity rubber layer, it is characterized in that, comprise following operation: the operation that forms basic unit by the ionic conductivity rubber layer, operation in the scope that the surface temperature and/or the atmosphere temperature of this ionic conductivity rubber layer is set in 130 ℃～150 ℃ forms the operation on the surface that is formed by the electron conduction polymeric layer in the periphery of this ionic conductivity rubber layer; This electron conduction polymeric layer has the sheet resistance value low than this ionic conductivity rubber layer, the ratio (A)/(B) of the sheet resistance value (A) of this ionic conductivity rubber layer and the sheet resistance value (B) of this electron conduction polymeric layer is arranged in 1＜(A)/(B)≤100 the scope.
The effect of invention
Among the present invention, the rubber layer that has basic unit and superficial layer by formation, wherein, basic unit is formed by the ionic conductivity rubber layer, superficial layer is formed by the electron conduction polymeric layer, and the relation of the sheet resistance value of ionic conductivity rubber layer and electron conduction polymeric layer set within the limits prescribed, can reduce environmental factor dependence, and the voltage-dependent of resistance value is significantly risen, can be provided at and all have good charged, conducting rubber roller that transfer printing is stable in the environment for use widely.
The simple declaration of accompanying drawing
[Fig. 1] is the sectional view that shows typical way of the present invention.
[Fig. 2] is the key diagram of the method for the sheet resistance value of mensuration rubber layer among the present invention.
[explanation of symbol]
11 basic units, 12 superficial layers, 13 supporting axis, 21 metallic roll, 22 insulators, 23 sheet metals, 24 conducting rubber rollers.
The best mode that carries out an invention
Fig. 1 is the sectional view that shows typical way of the present invention.Conducting rubber roller of the present invention is to be formed by rubber layer that contains basic unit 11 and superficial layer 12 and supporting axis 13, above-mentioned basic unit 11 is formed by the ionic conductivity rubber layer, and above-mentioned superficial layer 12 is formed by the electron conduction polymeric layer with sheet resistance value low than this ionic conductivity rubber layer.
Rubber layer can be only to be made of above-mentioned basic unit and superficial layer, the formation that also can also have other layer in interior week of above-mentioned basic unit or periphery particularly can form by ionic conductivity rubber layer and 2 layers of structure constituting at the electron conduction polymeric layer of its periphery.During this situation, can be without complicated step low-cost the manufacturing, but also can obtain having good charged, conducting rubber roller that transfer printing is stable.
In general, ionic-conductive polymer has advantage at the little this respect of voltage-dependent of resistance value, but owing to show water wettability as polyalcohol integral, therefore the trend of the environmental factor dependence increase of resistance value is arranged.On the other hand, though the electron conduction polymkeric substance has advantage at the little this respect of environmental factor dependence of resistance value, difficulty is dispersed in the polymkeric substance conductive material equably, and the voltage-dependent of resistance value has the trend of easy increase.Like this, in conducting rubber roller, use separately when no matter which kind of shows the polymkeric substance of electric conductivity, all be difficult to make the voltage-dependent and environmental factor dependence two Fang Junxiao of resistance value.
Among the present invention, by in not exposing extraneous basic unit's part, using ionic conductivity rubber, in the superficial layer that is subjected to the external environment influence easily, use the electron conduction polymkeric substance, of the influence of extraneous moisture can be got rid of, the low environment dependence and the low-voltage dependence of resistance value can be reached simultaneously ionic conductivity.In addition, the sheet resistance value by making superficial layer is less than the sheet resistance value of basic unit, can give like this conducting rubber roller good charged, transfer printing is stable.
Among the present invention, the ratio (A)/(B) of the sheet resistance value (B) of the sheet resistance value of ionic conductivity rubber layer (A) and electron conduction polymeric layer is set in 1＜(A)/(B)≤100 the scope.Among the present invention,, for the electron conduction polymeric layer lower than the resistance of ionic conductivity rubber layer is set, need make above-mentioned (A)/(B) for 1.On the other hand, above-mentioned (A)/(B) then can effectively prevent the decline charged, that transfer printing is stable as below 100.
The ionic conductivity rubber layer among the present invention and the sheet resistance value of electron conduction polymeric layer can be measured by for example following method.Fig. 2 is the key diagram of the method for the sheet resistance value of mensuration rubber layer among the present invention.Insulator 22 is set on the surface of metallic roll 21, and thereon with the interval of 100mm, it is that 0.5mm, size are the sheet metal 23 of 20mm that 2 thickness are set.Again on them, the periphery that is arranged on supporting axis is formed with the conducting rubber roller 24 of rubber layer, each end of direction of principal axis at this conducting rubber roller 24, on the arrow A direction, to apply 1.0kg, add up to the state of the load of 2.0kg, mensuration is the sheet resistance value after 5 seconds to 2 blocks of sheet metal conducting steady currents and constant voltage, and the measured value of 3 positions is averaged as sheet resistance value.
Among the present invention, the thickness of superficial layer is preferably 5 μ m～40 μ m.The thickness of superficial layer is as more than 5 μ m, then, the environmental factor dependence that the resistance value that the electron conduction polymeric layer has is set to obtain extend of hope because of reducing effect, as below 40 μ m, then can not destroy the low-voltage dependence of the resistance value that the ionic conductivity rubber layer had.Wherein, particularly preferably with the thickness setting of superficial layer more than the 10 μ m, below the 30 μ m.
Rubber constituent as ionic conductivity rubber used among the present invention, except ECD, urethane rubber, nitrile rubber, acrylic rubber, neoprene, fluororubber, nitrile rubber, norbornene rubbers etc. have outside the rubber of ionic conductivity, also exemplify as natural rubber (NR), butadiene rubber, isoprene rubber, styrene butadiene rubbers (SBR), ethylene-propylene-diene copolymer rubber (EPDM), butyl rubber, rubber such as organic silicon rubber, can use these compounds separately, also can use as potpourri mixing more than 2 kinds.Wherein, owing to have good electrical conductivity and a rerum natura, therefore ECD particularly preferably.
In the ionic conductivity rubber, be preferably and mix the filling agent that shows ionic conductivity, for example except the lithium perchlorate, the sodium perchlorate, cross outside the inorganic salts such as calcium chlorate, also can exemplify as lauryl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, OTAC, hexadecyltrimethylammonium chloride, modified aliphatic dimethyl ethyl ammonium ethylsulfate (denatured aliphatic dimethylethylammoniumethosulfate), the tetraethyl ammonium perchlorate, tetrabutyl ammonium perchlorate, the boron tetrabutylammonium, boron is fluoridized tetraethyl ammonium, quaternary ammonium salts such as tetrabutylammonium chloride, perchlorate, alkyl sulfonate, phosphate ester salt etc.These filling agents can use separately, use more than 2 kinds also capable of being combined.
Component of polymer as the electron conduction polymkeric substance that uses among the present invention, so long as the ratio (A)/(B) of the sheet resistance value (A) of ionic conductivity rubber layer and the sheet resistance value (B) of electron conduction polymeric layer can be adjusted at polymkeric substance in 1＜(A)/(B)≤100 the scope, then have no particular limits, for example, can use fluororesin, polyamide, acryl resin, organic siliconresin etc.Can use a kind of these component of polymer, also can use the potpourri more than 2 kinds.In addition, as the filling agent of giving electron conduction, can use carbon, metal oxide etc.
In ionic conductivity rubber and electron conduction polymkeric substance, in addition can also suitably mix the following gradation composition of using always in the manufacturing of bright rubber of stating.
As vulcanizing agent, sulphur series organic compounds such as Sulfur, tetraalkylthiuram disulfide, morpholine disulfide, alkyl phenol disulfide are arranged; Metallic compounds such as magnesium oxide; P-benzoquinones oxime, p, p '-dibenzoyl-oximes such as benzoquinones dioxime; Superoxide such as dicumyl peroxide, benzoyl peroxide; Sulfur chloride; Selenium; Tellurium etc., owing to can cheaply obtain, and sulfuration is abundant, and the mar proof on rubber rollers surface is good in addition, therefore is preferably Sulfur.
As vulcanization accelerator, dibenzothiazyl disulfide (DM), 2-mercaptobenzothiazole (D), 2-mercaptobenzothiazole zinc salt thiazoless such as (MZ) are arranged; Diisopropyl sulfenamide (DIBS), cyclohexyl sulfenamide sulfinylamines such as (CZ); Tetramethylthiuram disulfide (TT), tetraethylthiuram disulfide (TET), blue female thiurams such as (TRA) of tetra-sulfurized pair pentamethylene autumn; PZ salt (PZ), zinc diethyl dithiocarbamate salt dithiocar-bamates such as (EZ); The guanidine class; Thiourea; The aldehyde ammonia class; Xanthogenic acid salt etc.From the reaction that can promote rubber constituent and vulcanizing agent, shorten cure time, reduce curing temperature, reduce the Sulfur amount, improve the collapse strength of rubber rollers, the aspect of mar proof is considered, is preferably thiazoles, particularly preferably DM.In addition, from comparing with thiazoles, the angle of slow incipient scorch and very fast initial sulfuration is preferably sulfinylamines, particularly preferably CZ.
As vulcanization accelerator additive, can exemplify as fatty acid such as metal oxides such as zinc paste, zinc stearate, oleic acid.
In addition, except anti aging dopes such as amine system, phenol systems; Outside the filling agents such as carbon, silicon dioxide, clay, cork, talcum, lime carbonate, two base phosphites (DLP), basic magnesium carbonate, aluminium oxide, also can suitably mix softening agent, reinforcing agent etc.
Used rubber layer can be used as solid solid gum and modulates among the present invention, also can be used as foamed rubber (sponge gums) and modulates, and can suitably select according to the desirable performance of the electronic photographing device that adopts conducting rubber roller of the present invention.
Foamed rubber can be by the blowing promotor that adds gas-development agent and add as required in the gradation composition of rubber composition, is preferably in confined conditions to make by vulcanization forming.
As gas-development agent, better use chemical foaming agent, it is divided into organic system and inorganic system.As the gas-development agent of organic system, can use azobisformamide (ADCA), azoisobutyronitrile (AIBN), azoformic acid barium azo-compounds such as (Ba/AC); N, N '-dinitrosopentamethylene tetramine nitroso compounds such as (DPT), benzene sulfonyl hydrazide (BSH), 4,4 oxos two (benzene sulfonyl hydrazide) (OBSH), toluene sulfonyl hydrazide (TSH), biruea hydrazide derivatives such as (HDCA) etc.As the gas-development agent of inorganic system, can use sodium bicarbonate (sodium bicarbonate), ammonium bicarbonate, hartshorn salt, sodium bicarbonate etc.Both can use these compounds separately, also can will be used in combination more than 2 kinds.
In addition, as blowing promotor, except organic acids such as salicylic acid are the auxiliary agent, also can use urea is auxiliary agent etc.Wherein, for the gas-development agent of the suitable ECD that uses among the present invention, N particularly preferably, N '-dinitrosopentamethylene tetramine nitroso compounds such as (DPT).
Conducting rubber roller of the present invention can be made in accordance with the following methods.Promptly, form rubber layer having on the supporting axis of electric conductivity, this rubber layer contains basic unit and superficial layer, and this basic unit is formed by the ionic conductivity rubber layer, and this superficial layer is made of the electron conduction polymeric layer with sheet resistance value lower than this ionic conductivity rubber layer.
Basic unit and superficial layer for example can be made according to following method.That is, at first use the gradation composition of kneading machine mastication rubber composition after, extrusion molding is a cylindrical shape.With it at for example 4kgf/cm
2(3.92266 * 10
5Pa) under the load, 150 ℃ of vapour cures 50 minutes, insert stainless steel metal-cored after, grind rubber surface, obtain columnar basic unit.Then, the periphery in basic unit by electron conduction polymkeric substance such as method fluorine resin coating such as spraying, coatings, and is the dry thickness of regulation, and for example under 150 ℃ atmosphere temperature dry 1 hour, thus form superficial layer.
Can make conducting rubber roller of the present invention by above method.
In addition, in the said method, in the surface temperature of the ionic conductivity rubber layer during coating electron conduction polymkeric substance and/or the scope that atmosphere temperature better is set in 130～150 ℃.Be preferably by the following method and in basic unit, form the electron conduction polymeric layer, that is, in the basic unit under the heated condition by method application electron conduction polymeric layers such as spraying with compounding ingredient after, cool off again and make this material contracts.At this moment,, then the convergent force of electron conduction polymeric layer can be controlled in certain scope, obtain special good electron electric conductivity if atmosphere temperature is set in 130～150 ℃ the scope.Its reason is also indeterminate, but thinks the convergent force by control electron conduction polymeric layer, with the disperse state realization optimization of the electron conduction material in this electron conduction polymeric layer, thereby has improved electron conduction.Too high as atmosphere temperature, then be difficult to the accurate convergent force of controlling the electron conduction polymeric layer, the danger that the result exists dimensional stability to descend.On the other hand, if atmosphere temperature is low excessively, the convergent force of the electron conduction polymeric layer when then cooling off reduces, and the raising effect of electron conduction descends.
Embodiment
Below, embodiments of the invention are described.
(1) manufacturing of rubber rollers
(embodiment 1～4)
With kneading machine mastication ECD 80 mass parts, NBR20 mass parts, drop into stearic acid 1 mass parts, zinc paste 5 mass parts, carbon 20 mass parts, vulcanization accelerator 3 mass parts, Sulfur 1 mass parts more in turn in kneading machine, mixing obtains rubber composition.Being extruded into shape is cylindrical shape, at 4kgf/cm
2(3.92266 * 10
5Pa) under the load, 150 ℃ of vapour cures 50 minutes, insert stainless steel metal-cored after, grind rubber surface and form basic unit.In addition, ECD is the interpolymer of oxirane, allyl glycidyl ether and epichlorokydrin 3 kinds, and NBR is low nitrile NBR, and carbon is thermal black, vulcanization accelerator is tetramethylthiuram disulfide (TT) and dibenzothiazyl disulfide (DM), and vulcanizing agent is a Sulfur.
For basic unit, measure sheet resistance value according to method shown in Figure 2.Insulator 22 is set on the surface of metallic roll 21, and with the interval of 100mm 2 thickness being set thereon is that 0.5mm, width are the sheet metal 23 of 20mm.Again on them, be provided as the above-mentioned roller that is formed with basic unit that is formed with the conducting rubber roller 24 of basic unit in the periphery of supporting axis, each end of direction of principal axis at this roller, on the arrow A direction, to apply 1.0kg, add up to the state of the load of 2.0kg, mensuration is the sheet resistance value after 5 seconds to 2 sheet metals, 23 conducting steady currents and constant voltage, and the measured value of 3 positions is averaged as sheet resistance value.The sheet resistance value of basic unit is 1.1E+07 Ω.
After the periphery of the basic unit that forms was sprayed the fluororesin of application electron conduction, drying was 1 hour under 150 ℃ atmosphere, formed the superficial layer of the dry film thickness shown in table 1 and the table 2, obtained conducting rubber roller.In addition, do not spray application at the both ends of basic unit.
For resulting conducting rubber roller, according to measuring sheet resistance value with the same method of the roller that is formed with basic unit.The sheet resistance value of conducting rubber roller is 9.8E+05 Ω.
(2) environmental factor dependence
The conducting rubber roller of gained was placed on respectively in the various environment of L/L (10 ℃ of temperature, humidity 15%), N/N (22 ℃ of temperature, humidity 55%), H/H (28 ℃ of temperature, humidity 85%) 24 hours, and measured the resistance value of rubber rollers integral body afterwards.
Measure resistance value in accordance with the following methods.Promptly, the rubber rollers that is formed at metal shaft with 2.0kg is close on the rotating metallic roller of diameter 30mm, to the steady current of the metal shaft conducting 50 μ A that are formed with rubber rollers, read energising voltage afterwards in 5 seconds by ohmer (ト レ Star Network corporate system), calculate resistance value.
Pass through following formula:
Environmental factor dependence index (log Ω)=[resistance value under the L/L environment (log Ω)]-[resistance value under the H/H environment (log Ω)] by the gained resistance value, calculates the environmental factor dependence index.The results are shown in table 1.
[table 1]
| Thickness | The number of occurrence (n time) | Resistance value (log Ω) | The environmental factor dependence index | |||
| L/L | N/N | H/H | ||||
| Embodiment 1 | 10 | 1 | 5.60 | 5.45 | 5.26 | 0.35 |
| 2 | 5.72 | 5.70 | 5.64 | 0.07 | ||
| 3 | 5.73 | 5.64 | 5.60 | 0.13 | ||
| 4 | 5.56 | 5.48 | 5.30 | 0.26 | ||
| 5 | 5.56 | 5.34 | 5.26 | 0.30 | ||
| Embodiment 2 | 20 | 1 | 5.53 | 5.41 | 5.26 | 0.28 |
| 2 | 5.56 | 5.41 | 5.41 | 0.14 | ||
| 3 | 5.51 | 5.30 | 5.34 | 0.16 | ||
| 4 | 5.51 | 5.38 | 5.30 | 0.20 | ||
| 5 | 5.48 | 5.30 | 5.20 | 0.27 | ||
| Embodiment 3 | 30 | 1 | 5.51 | 5.34 | 5.30 | 0.20 |
| 2 | 5.51 | 5.34 | 5.30 | 0.20 | ||
| 3 | 5.51 | 5.34 | 5.26 | 0.25 | ||
| 4 | 5.53 | 5.34 | 5.26 | 0.28 | ||
| 5 | 5.48 | 5.30 | 5.30 | 0.18 | ||
| Comparative example | 0 | 1 | 6.53 | 5.87 | 5.56 | 0.97 |
| 2 | 6.55 | 5.89 | 5.58 | 0.97 | ||
| 3 | 6.54 | 5.89 | 5.58 | 0.96 | ||
| 4 | 6.53 | 5.88 | 5.58 | 0.95 | ||
| 5 | 6.51 | 5.85 | 5.56 | 0.95 | ||
(3) voltage-dependent
The conducting rubber roller of the gained load with 2.0kg is close on the rotating metallic roller of diameter 30mm, add the DC voltage of 100V and 500V with ohmer (ア De バ Application テ ス ト corporate system " R8340A "), obtain mean value by the maximal value and the minimum value of the resistance value after 30 seconds.
According to following formula:
Voltage-dependent index (log Ω)=[resistance value (log Ω) of outer added-time of 100V]-[resistance value (log Ω) of outer added-time of 500V] goes out the voltage-dependent index by the mean value calculation of gained.The results are shown in table 2.
[table 2]
| Thickness | The number of occurrence (n time) | Resistance value (log Ω) | The voltage-dependent index | ||
| 100V | 500V | ||||
| Embodiment 1 | 10 | 1 | 5.04 | 4.98 | 0.06 |
| 2 | 5.33 | 5.19 | 0.14 | ||
| 3 | 5.32 | 5.19 | 0.13 | ||
| 4 | 5.08 | 4.99 | 0.09 | ||
| 5 | 5.03 | 4.96 | 0.07 | ||
| Embodiment 2 | 20 | 1 | 4.94 | 4.85 | 0.08 |
| 2 | 4.99 | 4.92 | 0.07 | ||
| 3 | 4.89 | 4.83 | 0.07 | ||
| 4 | 4.91 | 4.85 | 0.07 | ||
| 5 | 4.89 | 4.83 | 0.06 | ||
| Embodiment 3 | 30 | 1 | 4.91 | 4.84 | 0.06 |
| 2 | 4.93 | 4.86 | 0.07 | ||
| 3 | 4.88 | 4.80 | 0.08 | ||
| 4 | 4.89 | 4.84 | 0.05 | ||
| 5 | 4.89 | 4.82 | 0.07 | ||
| Comparative example | 0 | 1 | 5.86 | 5.81 | 0.05 |
| 2 | 5.87 | 5.82 | 0.05 | ||
| 3 | 5.79 | 5.74 | 0.05 | ||
| 4 | 5.79 | 5.74 | 0.05 | ||
| 5 | 5.83 | 5.77 | 0.06 | ||
By the result shown in the table 1 as can be known, in the conducting rubber roller of the present invention, the environmental factor dependence index all below 0.5log Ω, has reached the level that satisfies as conducting rubber roller on practical face.The environmental factor dependence index of comparative example is compared with this comparative example less than the superficial layer that is formed by the electron conduction polymkeric substance in the scope of 0.95log Ω～0.97log Ω, and the environmental factor dependence of conducting rubber roller of the present invention significantly reduces.
In addition, by the result shown in the table 2 as can be known, in the conducting rubber roller of the present invention, the voltage-dependent index is all below 0.2log Ω, and the voltage-dependent of comparative example is 0.05log Ω～0.06log Ω, though compare slightly height with this comparative example less than the superficial layer that forms by the electron conduction polymkeric substance, do not enlarge markedly, on practical face, can satisfy level as conducting rubber roller.Even formed the superficial layer that forms by the electron conduction polymkeric substance, do not damage the low-voltage dependence that is had by the formed basic unit of ionic conductivity rubber yet.
By these results as can be known, the voltage-dependent and the environmental factor dependence of the resistance value of conducting rubber roller of the present invention significantly reduce, shown good charged, transfer printing is stable.
This disclosed embodiment and embodiment all are examples, are not the scopes of restriction.Scope of the present invention is not by above-mentioned explanation but shows by claim, comprises the meaning that is equal to claim and all changes in scope.
The possibility of utilizing on the industry
By the present invention, can provide the voltage-dependent of resistance value and environmental factor dependence all significantly low, all have good charged, conducting rubber roller that transfer printing is stable in environment for use widely.
Claims (5)
1. conducting rubber roller, it is the conducting rubber roller that is formed with the rubber layer that comprises basic unit (11) and superficial layer (12) on supporting axis (13), this basic unit (11) is formed by the ionic conductivity rubber layer, this superficial layer (12) is formed by the electron conduction polymeric layer with sheet resistance value lower than above-mentioned ionic conductivity rubber layer, it is characterized in that, the ratio (A)/(B) of the sheet resistance value (A) of above-mentioned ionic conductivity rubber layer and the sheet resistance value (B) of above-mentioned electron conduction polymeric layer is set in 1＜(A)/(B)≤100 the scope.
2. conducting rubber roller as claimed in claim 1, its feature are that also the thickness of above-mentioned superficial layer (12) is in the scope of 5 μ m～40 μ m.
3. conducting rubber roller as claimed in claim 1, its feature are that also the thickness of above-mentioned superficial layer (12) is in the scope of 10 μ m～30 μ m.
4. conducting rubber roller as claimed in claim 1, its feature are that also above-mentioned electron conduction polymeric layer is formed by the fluororesin that contains carbon or metal oxide.
5. the manufacture method of conducting rubber roller, it is the manufacture method that is formed with the conducting rubber roller of the rubber layer that comprises basic unit (11) and superficial layer (12) on supporting axis (13), this basic unit (11) is formed by the ionic conductivity rubber layer, this superficial layer (12) is formed by the electron conduction polymeric layer with sheet resistance value lower than above-mentioned ionic conductivity rubber layer, it is characterized in that, comprise the operation that forms basic unit (11) by the ionic conductivity rubber layer, operation in the scope that the surface temperature and/or the atmosphere temperature of above-mentioned ionic conductivity rubber layer is set in 130 ℃～150 ℃ is in the periphery of above-mentioned ionic conductivity rubber layer, form the operation of superficial layer (12) by electron conduction polymeric layer with sheet resistance value lower than above-mentioned ionic conductivity rubber layer; The ratio (A)/(B) of the sheet resistance value (B) of the sheet resistance value of above-mentioned ionic conductivity rubber layer (A) and above-mentioned electron conduction polymeric layer is set in 1＜(A)/(B)≤100 the scope.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003430175A JP2005188615A (en) | 2003-12-25 | 2003-12-25 | Conductive rubber roller, and its manufacturing method |
| JP430175/2003 | 2003-12-25 |
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|---|---|
| CN1867872A true CN1867872A (en) | 2006-11-22 |
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| CNA2004800305983A Pending CN1867872A (en) | 2003-12-25 | 2004-10-08 | Conductive rubber roller and process for producing the same |
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| JP (1) | JP2005188615A (en) |
| CN (1) | CN1867872A (en) |
| WO (1) | WO2005064418A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243459A (en) * | 2010-05-12 | 2011-11-16 | 住友橡胶工业株式会社 | Semiconductive roller and charging roller using the same |
| CN102580905A (en) * | 2012-02-15 | 2012-07-18 | 德州华源生态科技有限公司 | Method for processing conductive coatings of drawing and roving rubber rollers |
| CN106842865A (en) * | 2015-11-18 | 2017-06-13 | 新智德株式会社 | Fixing member |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6300413B2 (en) * | 2014-11-17 | 2018-03-28 | 住友ゴム工業株式会社 | Developing roller and image forming apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0749602A (en) * | 1993-05-31 | 1995-02-21 | Ricoh Co Ltd | Roller electrostatic charging device |
| JPH10282813A (en) * | 1997-04-01 | 1998-10-23 | Fuji Xerox Co Ltd | Voltage applying roll and image forming device |
| JP2001109231A (en) * | 1999-10-01 | 2001-04-20 | Bridgestone Corp | Conductive member and image forming device |
-
2003
- 2003-12-25 JP JP2003430175A patent/JP2005188615A/en active Pending
-
2004
- 2004-10-08 CN CNA2004800305983A patent/CN1867872A/en active Pending
- 2004-10-08 WO PCT/JP2004/014928 patent/WO2005064418A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243459A (en) * | 2010-05-12 | 2011-11-16 | 住友橡胶工业株式会社 | Semiconductive roller and charging roller using the same |
| CN102243459B (en) * | 2010-05-12 | 2015-10-14 | 住友橡胶工业株式会社 | Charged roller |
| CN102580905A (en) * | 2012-02-15 | 2012-07-18 | 德州华源生态科技有限公司 | Method for processing conductive coatings of drawing and roving rubber rollers |
| CN106842865A (en) * | 2015-11-18 | 2017-06-13 | 新智德株式会社 | Fixing member |
| CN106842865B (en) * | 2015-11-18 | 2021-01-29 | 新智德株式会社 | Fixing member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005188615A (en) | 2005-07-14 |
| WO2005064418A1 (en) | 2005-07-14 |
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