CN1293433C - Rubber roller - Google Patents
Rubber roller Download PDFInfo
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- CN1293433C CN1293433C CNB031104878A CN03110487A CN1293433C CN 1293433 C CN1293433 C CN 1293433C CN B031104878 A CNB031104878 A CN B031104878A CN 03110487 A CN03110487 A CN 03110487A CN 1293433 C CN1293433 C CN 1293433C
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- rubber
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
- G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers
- G03G15/0233—Structure, details of the charging member, e.g. chemical composition, surface properties
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- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Electrophotography Configuration And Component (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
The invention provides a rubber roller in which the coefficient of friction on roller surface is reduced, a resistance change is suppressed when the roller is used and the high durability is secured. The rubber roller has an arbor, layers of one layer or more on the outer peripheral side of the arbor and a rubber layer as the outermost layer. Therein, the surface roughness Rmax of the surface of the rubber layer as the outermost layer is made to be 2.0 mum-15.0 mum, an oxide film is formed on the surface of the rubber layer and, when the roller resistance at applied voltage 50 V before forming the oxide film is made to be R50 and the roller resistance at applied voltage 50 V after forming the oxide film is made to be R50a, the following relation can be obtained: logR50a-logR50=0.2-1.5.
Description
Technical field
The present invention relates to a kind of rubber coated pressure bowl, particularly, relate to and a kind ofly have good charged characteristic, be applicable to that the image of printer etc. forms the employed conductive roller of mechanism.
Background technology
In recent years, the high speed of laser printer, high-qualityization of image are popularized rapidly.In laser printer, in the initial stage that image forms, require directly with visual relevant photoreceptor and nearby parts etc. have high precision, high-durability, high speed (good response).Therefore, for the image that is used in this type of laser printer form mechanism, especially equably receive charged toner (toner), the toner that receives is waited to " developer roll " that the latent image of describing on photoreceptor is supplied with equably, the high precision of surface accuracy of roller surface (surfaceness) and roll form (out of roundness, vibration resistance) change must be indispensable.
In addition, in the competition of the printer market that intensifies, extensively carry out the cost cutting of parts etc., so people require compacter design.For this reason, above-mentioned developer roll is shifted to the elastic type of using rubber etc. gradually by the magnet mode of main flow mode in the past.This type of elasticity roller is set to and makes the toner that is applied with bias voltage can be attached to it equably.Therefore, this type of elasticity roller when adding 500V voltage, must have 10
4～10
8The resistance value of Ω degree.
Also have, the requirement by above-mentioned high precision int, high-durability etc. also requires to have the surface accuracy suitable with the metallic roller to the elasticity roller.Therefore, for surface accuracy that greatly improves roller surface or the tack that improves toner, existing people proposes the painting method and the surface treatment method of all height.
For example, the patent disclosure spy of Japan opens in the clear 54-57576 communique, and motion has a kind of ultraviolet ray to vulcanising rubber surface irradiation 200～430nm, the vulcanising rubber surface modification method of rubber surface being carried out modification.
Again, the patent disclosure spy of Japan opens in the flat 8-292640 communique, and motion has a kind of rubber coated pressure bowl, and described rubber coated pressure bowl has the rubber layer that the potpourri by ECO and unsaturated rubber forms, and this rubber layer is through the surface treatment of ultraviolet ray irradiation etc.
Also have, the patent disclosure spy of Japan opens flat 4-246427 communique and has proposed a kind of rubber coated pressure bowl, described rubber coated pressure bowl surface has the rubber layer that contacts with transported material, and in this rubber coated pressure bowl, surface treatment is carried out by hydrochloric acid series solvent or ultraviolet ray irradiation in the surface of this rubber layer.
Yet, the patent disclosure spy of Japan opens the problem that the method for clear 54-57576 communique motion exists: it only is modified as feature with the ultraviolet ray irradiation to vulcanising rubber surface, can't obtain high precision and good charged characteristic and only handle with the modification of ultraviolet ray irradiation when forming rubber coated pressure bowl.Again, the rubber epidermis is the occasion of type pressure surface, can not form above-mentioned high precision roller, and has the problem that outermost sulfided state is also inhomogeneous, can not make high-precision rubber coated pressure bowl.
Again, the patent disclosure spy of Japan drives the disclosed rubber coated pressure bowl of flat 8-292640 communique and has such problem: though the ultraviolet ray of rubber surface irradiation 200～450nm has been reduced friction factor, but when forming developer roll, can't form uniform surface, resistance variations in the time of can not fully suppressing the roller use, in addition, Japan's patent disclosure spy rubber coated pressure bowl of opening flat 4-246427 communique also has resistance variations in the time of can not suppressing roller fully use when making developer roll, can not realize the problem of high-durability.
Have, also the someone has considered to use specific coatings material etc. improving the method for surface accuracy again, but also existing problems: because coating material exerts an influence to matrix material character, even therefore rubber coated pressure bowl carried out coating can not obtain needed roller performance.In addition, coating unit etc. need equipment investment, cause cost to increase.
Summary of the invention
The present invention does in view of the above problems, and its problem is: a kind of rubber coated pressure bowl that reduces friction factor, the resistance variations when suppressing to use of roller surface and then realize high-durability is provided.
In order to solve above-mentioned problem, the invention provides a kind of rubber coated pressure bowl, described rubber coated pressure bowl have mandrel and its outer circumferential side more than 1 layer the layer, its outermost layer is a rubber layer, it is characterized in that,
The surfaceness Rmax on above-mentioned outermost rubber layer surface is 2.0 μ m～15.0 μ m, simultaneously
Be formed with oxide film on above-mentioned rubber layer top layer, the roller resistance when establishing the impressed voltage 50V of oxide film before forming is R50, when the roller resistance during impressed voltage 50V after oxide film forms is R50a, and logR50a-logR50=0.2～1.5.
The result of present inventor through studying with keen determination, find: become in the rubber coated pressure bowl of mirror-like in outermost rubber layer surface working, by forming oxide film on the rubber layer surface, obtain its with respect to do not form roller resistance value under the oxide film state fixed resistance rise, thus, can reduce friction factor, the resistance variations when suppressing to use and the realization high-durability of roller surface.Thus, because the slippage of roller surface is little and evenly, so can obtain particularly to be applicable to make the one-component toner carry out the rubber coated pressure bowl of the developer roll of photoreceptor latent image, the toner separation property of described rubber coated pressure bowl is good, and has excellent charged characteristic for a long time.
Because outermost rubber layer surface working is become mirror-like, its surfaceness Rmax is 2.0 μ m～15.0 μ m, therefore, can be when keeping the caoutchouc elasticity of rubber coated pressure bowl, obtain the surface of good precision, evenly passing of toner powder is connected into is possible, and can form uniform oxide film.Again, desirable range of surface roughness is 4.0 μ m～10.0 μ m.
If the roller resistance the when impressed voltage before oxide film forms is 50V is R50, when the roller resistance the when impressed voltage after oxide film forms is 50V is R50a, make logR50a-logR50=0.2～1.5, this be because, numerical value is little than 0.2 as described, then be difficult to realize low-friction coefficient, be difficult to improve permanance.On the other hand, numerical value is big than 1.5 as described, and the resistance variations when then roller uses increases, and is difficult to obtain the favorable conductive characteristic.In addition, because the roller resistance during with this low-voltage of 50V that can stablize impressed voltage is desired value, form the small resistance rising that causes so can catch by oxide film with good precision.Again, desirable above-mentioned numerical range is 0.6～1.2.
Above-mentioned oxide film is formed by ultraviolet ray irradiation or ozone irradiation ideally.Especially in the occasion of carrying out the ultraviolet ray irradiation, should use wavelength to shine 3～30 minutes according to rubber layer surface and the distance of UV-lamp and the factors such as kind of rubber ideally as the ultraviolet ray of 100nm～400nm.
Above-mentioned outermost layer rubber layer is formed by the rubber composition that contains rubber constituent, described rubber constituent is that epichlorohydrin rubber ratio with 20 weight %～100 weight % in whole rubber constituent is cooperated, simultaneously, in described rubber composition, the weight of acid acceptor (agent) with respect to this epichlorohydrin rubber is cooperated with the ratio more than the 0.5 weight %, below the 5.0 weight %.
By being that the epichlorohydrin rubber of the rubber ratio with 20 weight %～100 weight % in whole rubber constituent cooperates, can form good oxide film as halogenation.With epichlorohydrin rubber and other rubber mix the time, ideally, particularly mix with neoprene (CR), the fine butadiene rubber of propylene (NBR).
With respect to the weight of above-mentioned epichlorohydrin rubber, acid acceptor is cooperated with the ratio more than the 0.5 weight %, below the 5.0 weight %.This be because, be less than 0.5 weight % as the acid acceptor ratio, then can not produce the effect that sulfuration obstruction that the hydrochloric acid that takes place when preventing to add reaction of Salmon-Saxl by chlorine ether causes and photoreceptor pollute.On the other hand, more than 5.0 weight %, the problem of hardness rising is arranged then as acid acceptor.Desirable acid acceptor proportional range is more than the 1.0 weight %, below the 4.5 weight %.
As acid acceptor, because excellent dispersion, desirable is hydrotalcite.Other can use all materials as sour absorber effect as acid acceptor.
As above-mentioned epichlorohydrin rubber, can enumerate all chlorine ether based polymers.For example, can enumerate chlorine ether (EP) polyrubber, chlorine ether-oxirane (EO) multipolymer, chlorine ether-propylene oxide (PO) multipolymer, chlorine ether-allyl glycidyl ether (AGE) multipolymer, chlorine ether-oxirane-allyl glycidyl ether multipolymer, chlorine ether-propylene oxide-allyl glycidyl ether multipolymer, chlorine ether-oxirane-propylene oxide-allyl glycidyl ether (AGE) multipolymer etc. separately.
As the rubber constituent of above-mentioned rubber layer, desirable is polar rubber.Except above-mentioned epichlorohydrin rubber, neoprene (CR), acrylonitrile-butadiene rubber (NBR), also can use rubber monomer of epoxyhalopropane rubber, polybutadiene rubber (BR), styrene-butadiene rubber, butyl rubber (IIR), fluororubber, isoprene rubber (IR), urethane rubber (U), silicon rubber (Si), ACM, ethylene-propylene-diene rubber (EPDM) etc. and composition thereof.Other can use all elastomeric materials of various rubber, unsaturated rubber, thermoplastic elastomer etc.
Roller resistance during impressed voltage 500V after oxide film forms is 10
4Ω～10
8Ω, desirable is 10
4Ω～10
7Ω.
Why being set at above-mentioned scope, is that it is bad that image takes place easily because excessive as the little then electric current of the more above-mentioned scope of resistance.On the other hand, big as the more above-mentioned scope of resistance, then the efficient of toner supply etc. reduces and is difficult to be applicable to practicality.
In addition, to rubber constituent 100 weight portions of above-mentioned rubber layer, should cooperate the following plastifier of 5 weight portions ideally.Can form good oxide film thus.If plastifier is greater than 5 weight portions, then easy frosting or be installed on printer and the operation back is polluted photoreceptor easily when forming oxide film.Can enumerate the ionic conductive agent of the various plastifier, quaternary ammonium salt etc. of fatty acid, dibutyl phthalate (DBP) and phthalein dioctyl phthalate (DOP), the tricresyl phosphate etc. of the stearic acid that uses as processing aid etc. as above-mentioned plastifier.
As vulcanizing agent, particularly because can realize low resistance, so be ideal with the Cosan.In addition, except that sulphur, sulfur-containing organic compound, also can use superoxide etc.As sulfur-containing organic compound, for example, can enumerate tetramethylthiuram disulfide, N, the N-morpholine double dithio.Can enumerate benzoyl peroxide as superoxide.The addition of vulcanizing agent is, more than 0.5 weight portion, below 5 weight portions, desirable is 1 weight portion is above, below 3 weight portions to the rubber constituent of 100 weight portions.
In addition, should cooperate Thiourea with sulphur ideally.Especially, if epichlorohydrin rubber is vulcanized with sulphur and Thiourea, then compression set is reduced to below 15%, and permanance is good, and the precision can easily guarantee attrition process the time, and the oxide film that further improves under action of ultraviolet radiation forms effect.Other also can use pyrrolotriazine derivatives etc.
Particularly,, cooperate that 0.2 weight portion is above, the Thiourea of the following ratio of 3 weight portions to the above-mentioned rubber constituent of 100 weight portions, be desirably 1 weight portion above, below 2 weight portions.
As above-mentioned Thiourea, can use from tetramethyl thiourea, trimethyl thiourea, ethylene thiourea and (C
nH
2n+1NH)
2One or several thiocarbamides of selecting among the group who forms by Thiourea shown in the C=S (integers of n=1～10).
In addition, in not influencing the film formed scope of oxidation,, can cooperate various anti aging dopes in order to prevent the deterioration of rubber layer.Further, in order to improve physical strength, can cooperate the filling agent of silica, carbon black, potter's clay, talcum powder, barium sulphate, lime carbonate etc. as required.Ideally, filling agent should account in rubber composition below the 30 weight %.This is that then the flexibility of rubber might reduce because if the ratio of filling agent is crossed above-mentioned scope.
Rubber coated pressure bowl is being configured as under the state cylindraceous, and the bed thickness of its rubber layer is 0.5mm～10mm ideally, more desirably is 2mm～6mm.
This be because, less than 2mm, then be difficult to obtain suitable roll spacing as bed thickness, as greater than 10mm, then parts are difficult to realize miniaturization and too greatly.Again, the vibration resistance of the outside dimension precision of roller is below the 100 μ m, and further desirable is below the 50 μ m.
Rubber coated pressure bowl can be made only 1 layer; also can make except outermost rubber layer; consider factors such as the resistance adjustment of roller and surface protection, have a sandwich construction of 2 layers, 3 layers etc., performance is suitably set the cooperation, the lamination order beyond the outermost layer, lamination thickness of each layer etc. as requested.Rubber coated pressure bowl of the present invention, except developer roll, the conductive roller that also can be used as the charged roller that is used in printer, duplicating machine etc., transfer printing roller etc. uses.
Description of drawings
Fig. 1 is the synoptic diagram of rubber coated pressure bowl of the present invention.
Fig. 2 is the figure of the assay method of expression rubber coated pressure bowl resistance.
Among the figure, 1 is rubber coated pressure bowl, and 2 is mandrel, and 3 is aluminum barrel, and 4 is power supply.
Embodiment
Below, with reference to drawing example of the present invention is described.
As shown in Figure 1, rubber coated pressure bowl 1 is a drum, and empty therein portion is pressed into the mandrel (axle) 2 of drum, and both are bondd, install with cementing agent.Rubber coated pressure bowl 1 is configured in the mandrel outer circumferential side, becomes only by constituting that 1 layer of rubber layer forms.
As the rubber constituent of rubber layer, use the epichlorohydrin rubber (the copolymerization ratio of oxirane (EO)/epichlorokydrin (EP)/allyl glycidyl ether (AGE) is 56% (mole)/40% (mole)/4% (mole)) of 75 weight portions, the NBR of 25 weight portions.In addition, to epichlorohydrin rubber, cooperate the hydrotalcite of 3 weight portion acid acceptors by weight.
Also have, cooperate sulphur powder, vulcanization accelerator (ethylene thiourea), carbon black, lime carbonate to obtain rubber composition as vulcanizing agent.Behind mixing this rubber composition, extrude with the single shaft extruder and to be pre-formed into cylindricly, be cut to desired size and obtain preformed articles.This preformed articles is dropped into sulfurator, take place to vulcanize under the crosslinked temperature in rubber constituent.After the sulfuration, mandrel inserted obtain roller in the cylinder.
Grind roller surface by the cylinder muller, carry out mirror finish.Make surfaceness Rmax reach 7.1 μ m, after the washing, form oxide film by ultraviolet irradiating machine irradiation ultraviolet radiation (184.9nm).Per 90 degree irradiations ultraviolet ray in 5 minutes is turned round 4 times, forms oxide film in full week of roller.
Roller resistance R 50 when oxide film forms preceding impressed voltage 50V is 10
6.4Roller resistance R 50a when Ω, impressed voltage 50V after oxide film forms is 10
7.2Ω, logR50a-logR50=0.8.Roller resistance during impressed voltage 500V after in addition, oxide film forms is 10
6.3Ω.
Like this, be processed as in the rubber coated pressure bowl of smooth surface that surfaceness Rmax is 7.1 μ m having, by form oxide film on its surface, make obtain fixed resistance rise, realized the inhibition and the high-durability of resistance variations when the reduction of friction factor and roller use.Thus, because the slippage of roller surface is little and evenly, so the toner separation property is good, the charged characteristic of excellence particularly is applicable to make the one-component toner carry out the rubber coated pressure bowl of the developer roll of photoreceptor latent image when having long-term the use.
Below, embodiment, the comparative example of just relevant rubber coated pressure bowl of the present invention elaborate.
Relevant embodiment and comparative example, respectively by following table 1,2 and the material that forms of the cooperation of following record in, add the plastifier of stearic acid, quaternary amine etc. as required in right amount, by closed mixing machine mixing after, extrude the hollow tubular that is processed into external diameter Φ 22mm, internal diameter Φ 9.5mm with extruder, be installed on the mandrel of sulfuration usefulness, in sulfurator, under 160 ℃, carry out sulfuration in 1 hour.Adorning in the mandrel of the Φ 10mm that is coated with conductive adhesive, in 160 ℃ stove, boning., with end moulding, with cylinder muller carry out horizontal advance to grind, as polishing grind impose mirror ultrafinish, locate finishing respectively at Φ 20mm (tolerance 0.05) and be fixed surfaceness thereafter.Behind the washing roller surface, apply 50V voltage, measured roller resistance R 50 by method described later.
Further, shown in table 1,2, (SEN special light sources Co., Ltd. system PL21-200) is shone ultraviolet ray (184.9nm) to be fixed time respectively, and polishing processing has been carried out on top layer to use ultraviolet radiation device as required.The ultraviolet ray that per 90 degree irradiations are fixed time with roller revolution 4 times, forms oxide film in full week of roller (360 degree).Irradiation time in the table refers to the time of each face (90 degree scope).After oxide film forms, by method described later, the roller resistance when having measured the roller resistance R 50a when adding 50V voltage and having added 500V voltage.
Table 1
| Embodiment 1 | | | | Embodiment 5 | Embodiment 6 | Embodiment 7 | ||
| Rubber | Epichlorohydrin rubber | 75 | 100 | 100 | 20 | 100 | 70 | 100 |
| CR | 30 | |||||||
| NBR | 25 | 80 | ||||||
| Roller surface roughness (Rmax: μ m) | 7.1 | 6.5 | 6.8 | 6.7 | 6.3 | 9.8 | 14.8 | |
| After roller impedance (500V:log value) oxidation | 6.3 | 6.4 | 6.0 | 6.4 | 6.0 | 6.4 | 6.0 | |
| Before roller impedance 50 (50V:log value) oxidation | 6.4 | 6.2 | 6.0 | 6.4 | 6.0 | 6.4 | 6.0 | |
| After roller impedance 50a (50V:log value) oxidation | 7.2 | 7.2 | 6.8 | 6.8 | 7.1 | 7.0 | 6.6 | |
| R50a-R50 | 0.8 | 1 | 0.8 | 0.2 | 1.1 | 0.6 | 0.6 | |
| Oxide film formation method | Ultraviolet ray 5 minutes | Ultraviolet ray 5 minutes | Ultraviolet ray 5 minutes | Ultraviolet ray 5 minutes | Ultraviolet ray 5 minutes | Ultraviolet ray 5 minutes | Ultraviolet ray 5 minutes | |
| Print test | The initial stage image | ○ | ○ | ○ | ◎ | ◎ | ○ | △ |
| Print 3000 | ○ | ◎ | ○ | △ | ◎ | ○ | △ | |
| Comprehensively | ○ | ◎～○ | ○ | ○ | ◎ | ○ | △ | |
Table 2
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | ||||
| Rubber | Epichlorohydrin rubber | 75 | 75 | 75 | 75 | ||
| CR | |||||||
| NBR | 25 | 25 | 25 | 25 | |||
| Roller surface roughness (Rmax: μ m) | 7.1 | 7.1 | 10.1 | 15.8 | |||
| After roller impedance (500V:log value) oxidation | 6.3 | 6.4 | 6.4 | 6.4 | |||
| Before roller impedance 50 (50V:log value) oxidation | 6.4 | 6.4 | 6.4 | 6.4 | |||
| After roller impedance 50a (50V:log value) oxidation | 6.5 | 6.4 | 8.0 | 7.0 | |||
| R50a-R50 | 0.1 | 0 | 1.6 foreign odor rubber deterioration | Take place 0.6 resistance is uneven | |||
| Oxide film formation | Ultraviolet ray | 2 minutes | Irradiation ultraviolet radiation not | Ultraviolet ray 40 | Ultraviolet ray | 2 minutes | |
| Print test | The initial stage image | △～× | × | × | * visual degree of irregularity is big | ||
| Print 3000 | × | × | × | △ | |||
| Comprehensively | × | × | × | × | |||
Rubber layer (each weight portion uses in the table)
Daiso Co., Ltd. system: epichlorohydrin rubber (GECO) CG 102 (the copolymerization ratio of oxirane (EO)/epichlorokydrin (EP)/allyl glycidyl ether (AGE) is 56% (mole)/40% (mole)/4% (mole))
Japan Zeon Co., Ltd. system: CR neoprene WRT
Japan Zeon Co., Ltd. system: NBR Ni Po and (ニ Star Port one Le) 401LL
Vulcanizing agent
Cosan: sulphur is 1.0 weight portions to rubber constituent
Vulcanization accelerator: Kawaguchi's chemistry system, promoter 22-S ethylene thiourea becomes 0.5 weight portion to rubber
Other
Acid acceptor: hydrotalcite (DHT-4A-2), (ratio of epichlorohydrin rubber (GECO) with 3 weight % cooperated)
Carbon: to rubber constituent is 2 weight portions
Lime carbonate: to rubber constituent is 20 weight portions
(embodiment 1 to embodiment 7)
Embodiment 1 to embodiment 7, uses epichlorohydrin rubber as rubber constituent in the scope of 20 weight portions～100 weight portions.Among the embodiment 1,4,6, CR and NBR have been mixed as other rubber constituents.The hydrotalcite that epichlorohydrin rubber has been cooperated 3 weight %.Form oxide film under the condition of table 1, the value with logR50a-logR50 is adjusted into 0.2～1.5 scope respectively.Again, the surfaceness of roller is set at the scope of 2.0 μ m～15.0 μ m.
(comparative example 1 is to comparative example 4)
As shown in table 2, adjust the value of logR50a-logR50 respectively, also set the surfaceness of roller.
To each embodiment of above-mentioned making and the rubber coated pressure bowl of each comparative example, carried out following characteristic measurement.Its result is shown in above-mentioned table 1,2 hurdle, below.
(mensuration of roller electrical resistance)
As shown in Figure 2, conductive roller 1 butt that will run through by mandrel 2 is arranged is equipped on the aluminum barrel 3, will with power supply 4+the lead front end of the internal resistance r (100 Ω) that extremely links to each other is connected with an end face of aluminum barrel 3, simultaneously will with power supply 4-front end of the lead that extremely links to each other is connected with the other end of conductive roller 1, made mensuration.
Detection puts on the voltage of the internal resistance r of said wires, for detecting voltage V.
In this device, if be E with the impressed voltage, then the roller resistance R is, R=r * E/ (V-r), but that the item of current-r is considered as is minimum, so can be considered R=r * E/V.
Load the load of 500g at mandrel 2 two ends one by one, under the rotating state of the speed that makes it with 30rpm, detect voltage V during by above-mentioned fixed voltage (50V, 500V) when impressed voltage having measured 100 between 4 seconds, calculate R according to following formula.Again, said determination is to carry out under the constant temperature and humidity condition of 23 ℃ of temperature, relative humidity 55%.
(printing test)
In order to investigate toner separation property, charged homogeneity, the ageing stability (permanance) of toner, in commercially available laser printer (brother's industry system: HL1440) go up each rubber coated pressure bowl that embodiment and comparative example are installed, carried out performance evaluation by confirming image.
Image evaluation (initial stage image) is an evaluation object with the even degree of printing behind the half tone image (initial stage image) of gradation unequal.Be evaluated as: " ◎ ": very good, " zero ": good, " △ ": degree of irregularity is showy, " * ": degree of irregularity is big.
Durable evaluation (printing 3000) is 3000 that show half by printing, so that toner cartridge is not exclusively empty, comparison is poor with the initial stage image, estimates.Be evaluated as: " ◎ ": do not change " zero ": almost do not change " △ ": variation is big, " * ": change very big.
As shown in table 1, because the value of the logR50a-logR50 of the roller of embodiment 1～7 is in specialized range, and also in specialized range, the result who therefore prints test is no problem for the roller surface roughness, and each rubber coated pressure bowl can both confirm that use does not have problems as real machine.
On the other hand, as shown in table 2, very little because the value of the logR50a-logR50 of comparative example 1 is 0.1, the result who therefore prints test is bad.Especially permanance is bad.The value of the logR50a-logR50 of comparative example 2 is 0, and the result who therefore prints test is bad.
The value of the logR50a-logR50 of the rubber coated pressure bowl of comparative example 3 is 1.6, and is bigger, and the result who therefore prints test is bad.In addition, rubber coated pressure bowl generation foreign odor, rubber is deterioration also.In comparative example 4, the rubber coated pressure bowl surfaceness is 15.8 μ m, and is bigger, and the result who therefore prints test is bad.
By above explanation as can be known, according to the present invention, for the outermost rubber layer surface finish rubber coated pressure bowl that is mirror-like, by forming oxide film on the rubber layer surface, roller resistance value when not forming the oxide film state relatively, obtain the rising of fixed resistance, can realize the inhibition of resistance variations when the reduction of friction factor and roller use and then realize high-durability.Thus, because the slippage of roller surface is little and evenly, so the toner separation property is good, and use the charged characteristic with excellence for a long time, particularly be applicable to make the one-component toner carry out the rubber coated pressure bowl of the developer roll of photoreceptor latent image.
Like this, since little with the friction factor of toner, the good image that the toner separation property is good, do not have visual non-uniform phenomenon can be obtained.Again, the occasion at the polymerization toner that uses the little toner of particle diameter, uniform shapes also can obtain good image.Therefore, can realize high speed, the densification to printer, the response of high image quality requirement.
Claims (2)
1. rubber coated pressure bowl, it has mandrel, has layer more than 1 layer at described mandrel outer circumferential side, and outermost layer is rubber layer, it is characterized in that,
The surfaceness Rmax on above-mentioned outermost rubber layer surface is 2.0 μ m～15.0 μ m, simultaneously,
Be formed with oxide film on above-mentioned rubber layer top layer, the roller resistance when establishing the impressed voltage 50V of oxide film before forming is R50, when the roller resistance during impressed voltage 50V after oxide film forms is R50a, and logR50a-logR50=0.2～1.5,
Described oxide film is formed by ultraviolet ray irradiation or ozone irradiation, as described ultraviolet ray, uses wavelength to shine 3～30 minutes as the ultraviolet ray of 100nm～400nm.
2. rubber coated pressure bowl as claimed in claim 1, it is characterized in that, above-mentioned outermost layer rubber layer is formed by the rubber composition that contains rubber constituent, described rubber constituent is that epichlorohydrin rubber ratio with 20 weight %～100 weight % in whole rubber constituent is cooperated, simultaneously, in described rubber composition, the weight of acid acceptor with respect to this epichlorohydrin rubber is cooperated with the ratio more than the 0.5 weight %, below the 5.0 weight %.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002152505A JP4034595B2 (en) | 2002-05-27 | 2002-05-27 | Rubber roll |
| JP2002152505 | 2002-05-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1461979A CN1461979A (en) | 2003-12-17 |
| CN1293433C true CN1293433C (en) | 2007-01-03 |
Family
ID=29769824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031104878A Expired - Fee Related CN1293433C (en) | 2002-05-27 | 2003-04-15 | Rubber roller |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4034595B2 (en) |
| KR (1) | KR100508308B1 (en) |
| CN (1) | CN1293433C (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MY158492A (en) | 2000-11-17 | 2016-10-14 | Pure Depth Ltd | Improved display technology |
| NZ511255A (en) | 2001-04-20 | 2003-12-19 | Deep Video Imaging Ltd | Multi-focal plane display having an optical retarder and a diffuser interposed between its screens |
| NZ514500A (en) | 2001-10-11 | 2004-06-25 | Deep Video Imaging Ltd | A multiplane visual display unit with a transparent emissive layer disposed between two display planes |
| US7742239B2 (en) | 2002-03-17 | 2010-06-22 | Puredepth Limited | Method to control point spread function of an image |
| NZ521505A (en) | 2002-09-20 | 2005-05-27 | Deep Video Imaging Ltd | Multi-view display |
| JP5160728B2 (en) * | 2003-12-24 | 2013-03-13 | 住友ゴム工業株式会社 | Semiconductive rubber member for electrophotography |
| JP4955207B2 (en) * | 2004-02-12 | 2012-06-20 | 住友ゴム工業株式会社 | Conductive rubber member |
| JP2006145636A (en) * | 2004-11-16 | 2006-06-08 | Sumitomo Rubber Ind Ltd | Conductive roll |
| WO2009026457A1 (en) | 2007-08-22 | 2009-02-26 | Pure Depth Limited | Determining a position for an interstitial diffuser for a multi-component display |
| JP4499148B2 (en) * | 2007-11-27 | 2010-07-07 | 住友ゴム工業株式会社 | Flattening roller for ink coating |
| JP5410491B2 (en) | 2011-10-06 | 2014-02-05 | 住友ゴム工業株式会社 | Developing roller |
| JP5892894B2 (en) * | 2012-08-07 | 2016-03-23 | 株式会社神戸製鋼所 | Member that contacts rubber material |
| JP6555526B2 (en) * | 2015-10-13 | 2019-08-07 | 住友ゴム工業株式会社 | Semi-conductive roller |
| JP6835829B2 (en) | 2016-04-28 | 2021-02-24 | 株式会社秀峰 | How to make a blanket for printing |
| JP6872365B2 (en) * | 2016-12-26 | 2021-05-19 | シンジーテック株式会社 | Charging roll |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5457576A (en) * | 1977-10-17 | 1979-05-09 | Hayakawa Rubber | Property modifing method of vulcanized rubber product surface |
| JPH08292640A (en) * | 1994-11-22 | 1996-11-05 | Nippon Zeon Co Ltd | Rubber roll, rubber composition and image forming device |
| JPH11272043A (en) * | 1998-03-19 | 1999-10-08 | Nippon Zeon Co Ltd | Semiconducting rubber roll and image forming device |
| US6293895B1 (en) * | 1998-04-20 | 2001-09-25 | Oki Data Corporation | Transfer roller |
-
2002
- 2002-05-27 JP JP2002152505A patent/JP4034595B2/en not_active Expired - Fee Related
-
2003
- 2003-04-15 CN CNB031104878A patent/CN1293433C/en not_active Expired - Fee Related
- 2003-05-26 KR KR10-2003-0033385A patent/KR100508308B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5457576A (en) * | 1977-10-17 | 1979-05-09 | Hayakawa Rubber | Property modifing method of vulcanized rubber product surface |
| JPH08292640A (en) * | 1994-11-22 | 1996-11-05 | Nippon Zeon Co Ltd | Rubber roll, rubber composition and image forming device |
| JPH11272043A (en) * | 1998-03-19 | 1999-10-08 | Nippon Zeon Co Ltd | Semiconducting rubber roll and image forming device |
| US6293895B1 (en) * | 1998-04-20 | 2001-09-25 | Oki Data Corporation | Transfer roller |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100508308B1 (en) | 2005-08-17 |
| JP4034595B2 (en) | 2008-01-16 |
| KR20040021515A (en) | 2004-03-10 |
| CN1461979A (en) | 2003-12-17 |
| JP2003345088A (en) | 2003-12-03 |
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20070103 Termination date: 20200415 |