CN102033459B - Charged roller - Google Patents
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- CN102033459B CN102033459B CN201010501499.6A CN201010501499A CN102033459B CN 102033459 B CN102033459 B CN 102033459B CN 201010501499 A CN201010501499 A CN 201010501499A CN 102033459 B CN102033459 B CN 102033459B
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Abstract
The invention relates to a charged roller. The invention provides the charged roller capable of maintaining the charge characteristic for a long time. The outer periphery of a spindle of the charged roller is provided with at least one conductive rubber elastic layer. The average roughness of ten points of the charged roller in the axial direction is Rz1, the average roughness of ten points of the charged roller in the circumferential direction is Rz2, the average distance between concave and convex parts of the charged roller in the axial direction is Sm1, and the average distance between concave and convex parts of the charged roller in the circumferential direction is Sm2. The surface state of the charged roller satisfies the following formula, and the microhardness of the charged roller is 48-60 DEG. In the formula [1], 1.00<Rz1/Rz2<=2.00, 0<Sm1/Sm2<=1.00, and 11Mum<Rz1.
Description
Technical field
Photoreceptor that the present invention relates to the image processing system in order to make electro photography duplicating machine and printer or ink jet type (ト Na one ジ ェ ッ ト formula) duplicating machine and printer etc. etc. has uniform static and the charged roller that uses.
Background technology
The charged roller using in the image processing system of electro photography duplicating machine and printer etc. etc. also requires the electric conductivity of regulation except requiring not pollute the character of photoreceptor etc.
But, the problem that charged roller in the past has the easy residual toner of photoreceptor (toner) or adheres to external additive.If easily adhere to external additive etc., long-term use causes external additive etc. to adhere in a large number, and resistance change or its deviation occur, and charged characteristic reduces.Charged characteristic reduction causes the image of image processing system bad.
Therefore, people have proposed the charged roller (with reference to patent documentation 1) that can reduce surfaceness (Rz:10 point mean roughness), make surface smoothing.Also propose to form on the surface of electric conductivity coating member in order to prevent toner and adhering to of external additive thereof the charged roller (with reference to patent documentation 2) of organic or inorganic particulate sublayer below 0.3 μ m.
Even if also further the long-term use of requirement still can retainer belt electrical characteristics for charged roller.
Patent documentation in advance
Patent documentation
Patent documentation 1: TOHKEMY 2000-137369 communique
Patent documentation 2: TOHKEMY 2006-091495 communique
Summary of the invention
The present invention is directed to above-mentioned situation, its problem is to provide the charged roller of retainer belt electrical characteristics for a long time.
The charged roller that solves the solution of the present invention 1 of above-mentioned problem is characterised in that: have in the charged roller of one deck conducting rubber elastic layer at least in the periphery of mandrel (core gold), axial 10 mean roughness of this charged roller are Rz
1, this charged roller 10 mean roughness of circumferencial direction be Rz
2, this charged roller axial concavo-convex equispaced be Sm
1, this charged roller the concavo-convex equispaced of circumferencial direction be Sm
2time, the surface state of above-mentioned charged roller meets following formula, and the microhardness (マ ィ Network ロ hardness) of above-mentioned charged roller is 48～60 °.
[several 1]
1.00＜Rz
1/Rz
2≤2.00
0＜Sm
1/Sm
2≤1.00
Rz
1＞11μm
The solution of the present invention 2 is the charged roller described in scheme 1, it is characterized in that, this charged roller meets following formula:
[several 2]
Rz
1＜34μm
50μm＜Sm
1＜130μm
The charged roller of the solution of the present invention 3 is charged roller of scheme 1 or 2, it is characterized in that, the skin section of above-mentioned conducting rubber elastic layer arranges uses the surface treatment liquid that contains isocyanate compound to carry out surface-treated surface-treated layer.
The solution of the present invention 4 is charged roller of any one in scheme 1-3, it is characterized in that, the wet lapping formation that the surface of above-mentioned conducting rubber elastic layer is undertaken by utilizing water-fast pouncing paper.
Charged roller of the present invention, make axial surfaceness larger than the surfaceness of circumferencial direction, and the value than regulation is large, make below the axial concavo-convex concavo-convex equispaced that is on average spaced apart circumferencial direction, hardness for specifying simultaneously, thus, toner, external additive are difficult to be caught by recess, and performance is the effect of retainer belt electrical characteristics for a long time.
Brief description of the drawings
Fig. 1 is the brief strabismus map that represents charged roller image of the present invention.
Fig. 2 is the wet lapping situation figure that represents the charged roller of an embodiment.
Fig. 3 is the surperficial enlarged photograph of the charged roller of sample 1 in test example 2.
Fig. 4 is the surperficial enlarged photograph of the charged roller of sample 7 in test example 2.
Fig. 5 is the surperficial enlarged photograph of the charged roller of sample 10 in test example 2.
Fig. 6 is the surperficial enlarged photograph of the charged roller of sample 13 in test example 2.
Fig. 7 is the surperficial enlarged photograph of the charged roller of sample 18 in test example 2.
Fig. 8 is the surperficial enlarged photograph of the charged roller of sample 27 in test example 2.
Fig. 9 is the surperficial enlarged photograph of the charged roller of sample 28 in test example 2.
Figure 10 is the surperficial enlarged photograph of the charged roller of sample 29 in test example 2.
Figure 11 is the surperficial enlarged photograph of the charged roller of sample 40 in test example 2.
Figure 12 is the surperficial enlarged photograph of the charged roller of sample 41 in test example 2.
Figure 13 is the surperficial enlarged photograph of the charged roller of sample 42 in test example 2.
Figure 14 is the surperficial enlarged photograph of the charged roller of sample 43 in test example 2.
Symbol description
1 charged roller
11 water-fast pouncing papers
12 extract roller
13 backing rolls
14 take up rolls
15 lapping liquids
Embodiment
Charged roller of the present invention does not resemble charged roller in the past the roughness of surface integral is reduced, but make axial surfaceness larger and larger than the value of regulation than the surfaceness of circumferencial direction, making axial concavo-convex equispaced is below the concavo-convex equispaced of circumferencial direction, hardness for specifying simultaneously, thus, toner, external additive are difficult to be caught by recess, for a long time retainer belt electrical characteristics.
As long as charged roller of the present invention comprises the rubber elastomer with regulation electric conductivity, be not particularly limited, it can be also more than 2 layers can forming by 1 layer.In addition, can coating be set in most surface, also can surface-treated layer be set in the superiors.In a word, the surface of roller is the state that the relation of concavo-convex equispaced of the relation that meets the roughness of axial surface roughness and circumferencial direction, axial concavo-convex equispaced and circumferencial direction and axial roughness meet defined terms, and the microhardness of roller is 48-60 °.Specifically, when axial 10 mean roughness of charged roller are Rz
1, charged roller 10 mean roughness of circumferencial direction be Rz
2, charged roller the axial concavo-convex Sm that is on average spaced apart
1, the concavo-convex equispaced of this charged roller circumferencial direction is Sm
2time, the surface of roller meets following formula.
[several 3]
1.00＜Rz
1/Rz2≤2.00
0＜Sm
1/Sm
2≤1.00
Rz
1＞11μm
By forming such surface state, can keep good friction factor and under the state of charged characteristic, suppress toner fully, external additive is captured to recess., can in the situation that not reducing charged characteristic, suppress adhering to of toner, external additive, for a long time retainer belt electrical characteristics.
The microhardness of charged roller of the present invention is 48-60 °.If the microhardness of charged roller, in this scope, can obtain good image in the time that image forms.The microhardness of charged roller is lower than 48 °, and protuberance breaks, be easily subject to dirty, occur image bad.If microhardness is larger than 60 °, the protuberance on surface is presented on image.
In addition, preferred axes to 10 mean roughness Rz
1, circumferencial direction 10 mean roughness Rz
2, axial concavo-convex equispaced Sm
1meet following formula.
[several 4]
Rz
1＜34μm
50μm＜Sm
1＜130μm
By making the surface state of charged roller in above-mentioned scope, retainer belt electrical characteristics well, can suppress adhering to of toner, external additive simultaneously.If Rz
1be more than 34 μ m, possibly cannot obtain enough charged characteristics.
Charged roller further preferably meets following formula.
[several 5]
13.7μm≤Rz
1≤27.6μm
53.0μm≤Sm
1≤123.5μm
Can keep thus excellent charged characteristic, and suppress adhering to of toner, external additive, for a long time retainer belt electrical characteristics.
Here adopt accompanying drawing to describe charged roller of the present invention.Fig. 1 is the brief strabismus map that represents charged roller image of the present invention.As shown in Figure 1, charged roller 1 is provided with conducting rubber elastic layer 3 on axle 2.The outer peripheral face of this conducting rubber elastic layer 3, by being arranged on intermittently the protuberance 4 of the long Rack of circumferencial direction, forms the recess of the Rack along the circumferential direction extending.That is, the recess that forms jog is made up of long groove, between the protuberance 4 that this long groove is grown at arranged spaced, circumferencial direction and protuberance 4, forms.Above-mentioned formula [several 3] represents the state of the groove that the Rack along the circumferential direction extending is as mentioned above set.Here above-mentioned Rz,
1/ Rz
2> 1.00 represents to arrange the groove of the Rack along the circumferential direction extending, 0 < Sm
1/ Sm
2≤ 1.00 represent that the groove of the Rack extending is vertically less than the groove of the Rack along the circumferential direction extending.Charged roller of the present invention is provided with along the circumferential direction the recess of the Rack extending, and there is a great difference the concavo-convex equispaced of circumferencial direction according to the difference of measuring part, and concavo-convex equispaced Sm vertically
1the different impact of not tested certain portions." along the circumferential direction " described here refers to respect to the angle that is axially for example 45 ° of-135 ° of left and right.Described groove, without forming across circumferencial direction, can disconnect with length to a certain degree, is preferably arranged to groove and intersects with groove.By the groove along the circumferential direction extending is set, toner etc. slip, and are difficult to be attached to the surface of charged roller.In addition, even if toner is attached to recess, with the contact portion of photoreceptor etc., the relative area of the attachment portion of toner etc. is little, therefore can make the uniform chargeds such as photoreceptor.In addition, if Rz
1/ Rz
2lower than 1, form the state of groove that the Rack extending is vertically set, use for a long time toner etc. to be attached in a large number recess, charged characteristic reduces, and in the time that image forms, on image, produces band.And if Rz
1/ Rz
2larger than 2, concavo-convex excessive when image forms, there is electric discharge inhomogeneous, there is image bad.In addition, if Rz
1be below 11 μ m, cannot obtain sufficient effect, easily adhere to toner etc.
In above-mentioned [several 3]-[several 5], by 10 mean roughness Rz to axial
1with axial concavo-convex equispaced Sm
1specify, specified the height of axial protuberance, width of axial protuberance etc.
In order to form above-mentioned surface state, for example, preferably in the time of mixing roll, implement the wet lapping that utilizes water-fast pouncing paper to carry out.Now, the surfaceness that can grind is axially larger than the surfaceness of circumferencial direction.
Here, wet lapping is the sand paper that uses for example water tolerance of water-fast pouncing paper, under the state of roller rotation, roller is in contact with it on one side on one side grinds its supply lapping liquid.Specifically as shown in Figure 2, by water-fast pouncing paper 11 by extracting roller (volume I go out ロ mono-Le) 12 volumes to backing roll (being subject to け ロ mono-Le) 13, be rolled onto on take up roll 14, on water-fast pouncing paper 11, supply with lapping liquid 15 simultaneously, make, under the state rotating relative to the charged roller 1 of configuration with backing roll 13, it to be contacted with water-fast pouncing paper 11.Under this state, make charged roller 1 mobile while grind vertically, obtain above-mentioned surface state.That is, regulation concavo-convex along the circumferential direction extending is set, makes axial surfaceness larger than the surfaceness of circumferencial direction, make below the axial concavo-convex concavo-convex equispaced that is on average spaced apart circumferencial direction.
Also can as required, implement to carry out dry grinding by grinding tool (grinding whetslate) before the wet lapping that utilizes wet-strong paper to carry out.For example and grindstone contact edge vertically mobile carry out following at the state that makes roller rotation of dry grinding specifically.
Here, conducting rubber elastic layer of the present invention is in rubber substrate, to add the material of giving electric conductivity, and being shaped and vulcanizing obtains.Rubber substrate can be polyurethane, epichlorohydrin rubber, nitrile rubber (NBR), styrene rubber (SBR), chloroprene rubber etc.Polyurethane particularly preferably ether system or ester is the polyurethane that polyvalent alcohol and isocyanate reaction obtain, and particularly preferably using ether is polyurethane.Ether is that to be preferably taking ether be polyvalent alcohol to polyurethane reacts that obtain, so-called casting type polyurethane with polyisocyanates as the polyvalent alcohol of main body.It is the cause that can reduce compression set due to this.
For example have with the isocyanates of polyol reaction: 2,4-toluene diisocyanate (TDI), 4,4 '-methyl diphenylene diisocyanate (MDI), PPDI (PPDI), 1,5-naphthalene diisocyanate (NDI), 3,3-dimethyl diphenyl-4,4 '-diisocyanate (TODI) and two ends have modification body, the condensate etc. of prepolymer of these isocyanates etc.
The material of giving electric conductivity can be the material of giving electron conduction of carbon black, metal powder etc., give the material of ionic conductivity or both mix use by them.The material of giving ionic conductivity has: organic salt, inorganic salts, metal complex, ionic liquid etc.Organic salt, inorganic salts have: lithium perchlorate, quaternary ammonium salt, sodium trifluoroacetate etc.Metal complex has: iron halide-ethylene glycol etc.Specifically, can be the material described in No. 3655364 communique of Japanese Patent.Ionic liquid can be under room temperature to be the fuse salt of liquid, also referred to as normal temperature fuse salt, refers in particular to fusing point and be 70 DEG C of following, preferred 30 DEG C of following fuse salts.Can be the material described in TOHKEMY 2003-202722 communique specifically.
Charged roller of the present invention can arrange surface-treated layer, coating after grinding, preferably implements surface treatment, the friction factor and the charged characteristic that make it keep surface state and have regulation.By carrying out surface treatment, the axial concavo-convex number of roller has the tendency of increasing, but final surface state still will keep above-mentioned state.
Surface-treated layer is that conducting rubber elastic layer is immersed in surface treatment liquid or by spraying and waits coating surface treating fluid, and its dry solidification is formed.Skin section by surface treatment liquid infiltration at conducting rubber elastic layer, forms surface-treated layer.
Here, surface treatment liquid is that isocyanate prepolymer composition is at least dissolved in organic solvent and is obtained.
Isocyanate prepolymer composition contained in surface treatment liquid has: 2,6-toluene diisocyanate (TDI), 4,4 '-methyl diphenylene diisocyanate (MDI), PPDI (PPDI), 1,5-naphthalene diisocyanate (NDI) and 3,3-dimethyl diphenyl-4, the isocyanate compound of 4 '-diisocyanate (TODI) etc., and above-mentioned condensate and modification body etc.It can also be the prepolymer being formed by polyvalent alcohol and isocyanates.
In surface treatment liquid, can contain polyethers based polymer.Here, polyethers based polymer is preferably dissolvable in water organic solvent, also preferably has reactive hydrogen, can react with isocyanate compound and carry out chemical bonding.
The preferred polyethers based polymer with reactive hydrogen for example has epichlorohydrin rubber.Epichlorohydrin rubber described here refers to the not epichlorohydrin rubber of sulfided state.Epichlorohydrin rubber can make surface-treated layer in having electric conductivity, have elasticity, therefore preferred.Epichlorohydrin rubber end has reactive hydrogen (hydroxyl), also preferably in unit, has hydroxyl, allyl isoreactivity hydrogen.Epichlorohydrin rubber can be chloropropylene oxide homopolymer, chloropropylene oxide-ethylene oxide copolymer, chloropropylene oxide-allyl glycidyl ether multipolymer, chloropropylene oxide-oxirane-allyl glycidyl ether terpolymer or derivatives thereof etc.
Other preferred polyethers based polymer with reactive hydrogen has: have hydroxyl or allylic polymkeric substance, for example, have polyvalent alcohol, glycol etc.As above-mentioned polyethers based polymer, compared with the group that possesses tool reactive hydrogen with two ends, preferably only possesses the group of tool reactive hydrogen at an end.In addition, preferred number average molecular weight is 300-1000.This can make surface-treated layer have elasticity.Above-mentioned polyethers based polymer for example has: polyalkylene glycol mono methyl ether, poly alkylene glycol dimethyl ether, allylation polyethers, polyalkylene glycol type dibasic alcohol (Port リ ァ Le キ レ Application グ リ コ mono-Le ジ ォ mono-Le), polyalkylene glycol type trihydroxy alcohol (Port リ ァ Le キ レ Application グ リ コ mono-Le ト リ ォ mono-Le) etc.
As mentioned above, by add polyethers based polymer in surface treatment liquid, can make the flexibility, intensity of surface-treated layer improve, result can not make the surface abrasion of needed roller or the surface tear such as the photoreceptor that contacts.
In surface treatment liquid, can also contain the polymkeric substance that is selected from acrylic acid fluorine based polymer (ァ Network リ Le Off ッ prime system Port リ マ mono-) and acrylic acid silicon-type polymkeric substance (ァ Network リ Le シ リ コ mono-Application is Port リ マ mono-).
The acrylic acid fluorine based polymer using in surface treatment liquid of the present invention and acrylic acid silicon-type polymkeric substance are to be dissolvable in water in the solvent of regulation, can to react and the material of chemical bonding with isocyanate compound.Acrylic acid fluorine based polymer is for example the fluorine based polymer with the solvent soluble of hydroxyl, alkyl or carboxyl, for example, have: the segmented copolymer or derivatives thereof of acrylate and fluoroalkyl acrylate etc.Acrylic acid silicon-type polymkeric substance is the silicon-type polymkeric substance of solvent soluble, for example, have: the segmented copolymer or derivatives thereof of acrylate and silicon Acrylote oxyalkyl ester etc.
In surface treatment liquid, can further add the carbon black of acetylene black, Ketjen black, TOKABLACK (ト mono-カ Block ラ ッ Network) etc. as the material of giving electric conductivity.
The carbon black using in surface treatment liquid is preferably 0～40 quality % with respect to isocyanate prepolymer composition.Cross at most come off, the problem such as physical property reduction, not preferred.
Acrylic acid fluorine based polymer in surface treatment liquid and acrylic acid silicon-type polymkeric substance are with respect to isocyanate prepolymer composition, and the total amount that preferably makes acrylic acid fluorine based polymer and acrylic acid silicon-type polymkeric substance is 10～70 quality %.If be less than 10 quality %, the effect carbon black etc. being remained in surface-treated layer reduces.And if the amount of polymkeric substance is more than 70 quality %, the resistance value of charged roller raises, and flash-over characteristic reduces, or isocyanate prepolymer composition reduces relatively, cannot form effective surface-treated layer.
Further, in surface treatment liquid, contain the organic solvent that dissolves isocyanate prepolymer composition and these polyethers based polymers that contain as required, acrylic acid fluorine based polymer and acrylic acid silicon-type polymkeric substance.Organic solvent is not particularly limited, and can use the organic solvents such as ethyl acetate, methyl ethyl ketone (MEK), toluene.
As mentioned above, by making surface treatment liquid infiltration in the skin section of conducting rubber elastic layer and it being solidified, surface-treated layer is set, surface-treated layer infiltrates and arranges integratedly in the skin section of conducting rubber elastic layer.Above-mentioned surface-treated layer is mainly that isocyanate prepolymer composition solidify to form, and is that the density of isocyanate prepolymer composition is sparsely integrally formed to inside successively from surface.
Here, as mentioned above, arrange on the surface of rubber elastic layer while having carried out surface-treated surface-treated layer with the surface treatment liquid that contains isocyanates, can obtain surface state and the friction factor of regulation by this surface treatment, resistance value deviation is little simultaneously, and performance can obtain the effect of the charged roller of the resistance value with regulation.
When the surface of conducting rubber elastic layer arranges coating, for example, can on conducting rubber elastic layer, be coated with paint, make its dry solidification, be configured as thus coating.Paint can use the known materials such as polyurethane, acroleic acid polyurethane, nylon, NBR.The method of coating paint preferably adopts dip coating, rolling method, spraying process etc.
According to embodiment, the present invention is described below, but the present invention being not limited by it.
(sample 1)
The preparation method > of < roller
At 100 mass parts epichlorohydrin rubbers (ェ ピ Network ロ マ mono-CG-102, ダ ィ ソ mono-society's system) in add respectively 0.5 mass parts sodium trifluoroacetate as electric conductivity imparting agent, 3 mass parts zinc white, 2 mass parts stearic acid, 1.5 mass parts vulcanizing agents, mixing with roll-type stirring machine, surface-pressure at the mandrel of diameter 6mm is shaped, and obtains having formed on mandrel surface the roller of elastic layer.
The grinding > on < roller surface
Roller is ground with grinding tool, carry out wet lapping with the device shown in Fig. 2 having met after size, form along the circumferential direction extend concavo-convex, make axial surfaceness larger than the surfaceness of circumferencial direction.
The preparation > of < surface treatment liquid
100 mass parts ethyl acetate, 20 mass parts isocyanate compounds (MDI) are disperseed to mix 3 hours with bowl mill.
The surface treatment > of < roller
Under the state that surface treatment liquid is kept to 20 DEG C, above-mentioned roller is flooded 30 seconds, then heat 10 hours with the baking oven that remains 100 DEG C, obtain charged roller.
(sample 2-39)
Change the roughness of water-fast pouncing paper, concentration, the microhardness of rubber substrate etc. of surface treatment liquid, obtain the charged roller shown in table 1 and 2.
(sample 40-43)
Do not carry out wet lapping, change concentration, the microhardness of rubber substrate etc. of surface treatment liquid, obtain the charged roller shown in table 2.
(test example 1)
For each charged roller, with surfaceness meter (little slope institute system, SE-3300), measure axial surface roughness Rz according to JISB0601-1994
1(μ m), axial concavo-convex equispaced Sm
1(μ m), the surfaceness Rz of circumferencial direction
2(μ m).The surfaceness of each charged roller and concavo-convex equispaced are two ends and central portion is measured at three places totally, obtain mean value.Result as shown in Tables 1 and 2.
(test example 2)
Observe the surface of the charged roller of sample 1, sample 7, sample 10, sample 13, sample 18, sample 27, sample 28, sample 29, sample 40-43 by laser microscope (VK-9500, Keyence society system).Result is as shown in Fig. 3-14.
(test example 3) resistance to soiling
Each charged roller is assembled in commercially available laser printer (LP-8900, EPSON society system) to the dirty state in surface of the each charged roller of visualization after printing 20000.Resistance to soiling is with zero: do not have dirty, △: slightly dirty, ×: have dirty judgement.Result as shown in Tables 1 and 2.
(test example 4) picture appraisal
Each charged roller is assembled in commercially available laser printer (LP-8900, EPSON society system), carries out solid printing test, the image of visual valuation printing.The unit of surfaceness is μ m.Picture appraisal is with zero: there is no inequality, draw a portrait uniformly, △: image is slightly uneven, ×: observing shows money or valuables one carries unintentionally judges.Result as shown in Table 1 and Table 2.
(test example 5) microhardness
Measure the microhardness of each charged roller with microhardness testers (MD-1, macromolecule gauge society system).Result as shown in Table 1 and Table 2.
[table 1]
[table 2]
(result gathers)
1.00 < Rz
1/ Rz
2≤ 2.00,0 < Sm
1/ Sm
2≤ 1.00,11 μ m < Rz
1, microhardness is that the charged roller of the sample 1-26 of 48-60 ° does not all have dirty in resistance to soiling test, or slightly dirty, it is no problem in actual applications degree, and in picture appraisal test, there is no inequality, form uniform image or image inequality very little, be no problem in actual use degree.Specifically, 11 μ m < Rz
1the sample 1-4 of < 13.7 μ m and 24 charged roller are dirty a little as seen on roller surface, but are almost no problem degree, do not observe image inequality in picture appraisal.And Rz
1the sample 18-23 of > 27.6 μ m and the roller of 25-26 can be observed image inequality a little, but are degree out of question, and roller surface has no dirty.13.7 μ m≤Rz
1≤ 27.6 μ m and 53.0 μ m≤Sm
1the charged roller of the sample 5-17 of≤123.5 μ m is not all observed dirty on roller surface, do not observe image inequality yet.
On the other hand, Rz
1/ Rz
2sample 27 lower than 1 and the charged roller of 40-43 show money or valuables one carries unintentionally as seen in picture appraisal.And Rz
1/ Rz
2than 2, the charged roller of large sample 37-39 shows money or valuables one carries unintentionally as seen too in picture appraisal.
Rz
1the charged roller that is the sample 27-32 below 11 μ m shows money or valuables one carries unintentionally as seen too in picture appraisal, also observes roller dirty.Even if the charged roller that microhardness is 45.4-47.3 ° meets 1.00 < Rz
1/ Rz
2≤ 2.00,0 < Sm
1/ Sm
2≤ 1.00, Rz
1> 11 μ m still show money or valuables one carries unintentionally as seen in picture appraisal, observe roller dirty (sample 33-36).
As known from the above, meet 1.00 < Rz
1/ Rz
2≤ 2.00,0 < Sm
1/ Sm
2≤ 1.00, Rz
1> 11 μ m and microhardness are that the charged roller of the present invention of 48-60 ° can not make charged characteristic reduce, and can suppress toner, external additive adheres to, retainer belt electrical characteristics for a long time.Particularly 13.7 μ m≤Rz
1≤ 27.6 μ m and 53.0 μ m≤Sm
1the charged roller of≤123.5 μ m keeps excellent charged characteristic, and the while can be suppressed toner, external additive adheres to, retainer belt electrical characteristics for a long time.
As shown in Fig. 3-7, the charged roller surface of visible sample 1, sample 7, sample 10, sample 13 and sample 18 is provided with the long recess of circumferencial direction.And long recess is not observed on the surface of the charged roller of sample 40-43 in any direction.
Claims (3)
1. charged roller, this charged roller is to have at least charged roller of one deck conducting rubber elastic layer in the periphery of mandrel, it is characterized in that, 10 mean roughness axial in this charged roller are Rz
1, this charged roller circumferencial direction 10 mean roughness be Rz
2, this charged roller axial concavo-convex equispaced be Sm
1, this charged roller circumferencial direction concavo-convex equispaced be Sm
2time, the surface state of charged roller meets following formula, and the microhardness of above-mentioned charged roller is 48-60 °,
[several 1]
1.00＜Rz
1/Rz
2≤2.00
0＜Sm
1/Sm
2≤1.00
11μm＜Rz
1，
Rz
1＜34μm
50μm＜Sm
1＜130μm。
2. the charged roller of claim 1, is characterized in that, the skin section of above-mentioned conducting rubber elastic layer arranges uses the surface treatment liquid that contains isocyanate compound to carry out surface-treated surface-treated layer.
3. the charged roller of claim 1 or 2, is characterized in that, the wet lapping formation that the surface of above-mentioned rubber elastic layer is undertaken by utilizing water-fast pouncing paper.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009228694 | 2009-09-30 | ||
| JP2009-228694 | 2009-09-30 | ||
| JP2010200349A JP5477745B2 (en) | 2009-09-30 | 2010-09-07 | Charging roll |
| JP2010-200349 | 2010-09-07 |
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| Publication Number | Publication Date |
|---|---|
| CN102033459A CN102033459A (en) | 2011-04-27 |
| CN102033459B true CN102033459B (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010501499.6A Active CN102033459B (en) | 2009-09-30 | 2010-09-30 | Charged roller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2602667B1 (en) * | 2011-12-08 | 2019-07-24 | HP Printing Korea Co., Ltd. | Electrophotographic image forming apparatus |
| WO2018025870A1 (en) * | 2016-08-04 | 2018-02-08 | Nok株式会社 | Conductive roll |
| EP3848759B1 (en) * | 2018-09-05 | 2022-12-28 | NOK Corporation | Charging roll |
| EP4023896B1 (en) * | 2019-08-26 | 2023-10-18 | NOK Corporation | Charging roll |
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| CN1609726A (en) * | 2003-04-07 | 2005-04-27 | 佳能化成株式会社 | Charging roller, process cartridge and electrophotographic apparatus |
| CN101063852A (en) * | 2006-04-28 | 2007-10-31 | 夏普株式会社 | Image forming apparatus, process cartridge used therein, and production method of charging roller |
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| JP2004309910A (en) * | 2003-04-09 | 2004-11-04 | Canon Inc | Electrifying member |
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|---|---|---|---|---|
| CN1609726A (en) * | 2003-04-07 | 2005-04-27 | 佳能化成株式会社 | Charging roller, process cartridge and electrophotographic apparatus |
| CN101063852A (en) * | 2006-04-28 | 2007-10-31 | 夏普株式会社 | Image forming apparatus, process cartridge used therein, and production method of charging roller |
Non-Patent Citations (1)
| Title |
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| JP特开2004-309910A 2004.11.04 |
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| CN102033459A (en) | 2011-04-27 |
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