CN101649063A - Foaming rubber part - Google Patents
Foaming rubber part Download PDFInfo
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- CN101649063A CN101649063A CN200910166087A CN200910166087A CN101649063A CN 101649063 A CN101649063 A CN 101649063A CN 200910166087 A CN200910166087 A CN 200910166087A CN 200910166087 A CN200910166087 A CN 200910166087A CN 101649063 A CN101649063 A CN 101649063A
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Abstract
The invention provides a foaming rubber part with excellent abrasion resistance and resistance to pollution. The foaming rubber part is obtained in the way that the foaming elastomer can be in the impregnation treatment by a treatment liquid containing isocyanate compound and organic solvent, and at least the density of the isocyanate compound is decreased periodically from the surface of the foaming elastomer to the inner.
Description
Technical field
Foamed rubber member in roller of the charged roller that the present invention relates to be particularly suitable for to use in the various OA apparatuses such as duplicating machine, facsimile recorder, various printers, transfer roll, developer roll, conductive roll, paper feeding, transmission usefulness etc.
Background technology
For charged, transfer printing, the development of various OA apparatuses, or the roller of paper feeding, transmission usefulness, require to reduce hardness not damage the parts of contact, for example photoreceptor etc.In the past, this roller used EPDM rubber (with reference to patent documentation 1,2).But, as described in these documents, when using solid rubber to seek to reduce hardness, being necessary to add a large amount of tenderizers, the result is owing to ooze out existing problems aspect the pollution that caused or the weather resistance.
On the other hand, using sponge sometimes is that foam makes roller be soft.The soft ratio of sponge roller is easier to, and in addition, can alleviate quality, and anti-paper mealiness is also excellent.But the sponge roller might produce following problem: if life-time service then produces the bad problem of image (charged, transfer roll), or conveying capacity reduces the problem of (roller of paper feeding, transmission usefulness).
In addition, the toner supplying roller (with reference to patent documentation 3) that coating infiltration isocyanate compound forms on the polyurethane foam laminar surface has been proposed.This roller hardness is low, can not ooze out unreacted polyhydroxy reactant on the roller surface, but is crimped under the situation of long-time use on the antithesis parts, requires weather resistance further to improve.
In addition, need stain resistance than more excellent in the past foamed rubber member.
[patent documentation 1] Japanese kokai publication hei 5-77508 communique
[patent documentation 2] Japanese kokai publication hei 7-242779 communique
[patent documentation 3] TOHKEMY 2008-15008 communique
Summary of the invention
The present invention in view of the above problems, its purpose is, the foamed rubber member of stain resistance and excellent in te pins of durability is provided.
The 1st embodiment of the present invention that addresses the above problem is a foamed rubber member, it is characterized in that, be to use the treatment solution that contains isocyanate compound (イ ソ シ ア ネ one ト compound) and organic solvent that foaming elastomer is infiltrated to handle and obtain, the density of isocyanate compound becomes thin from the surface of above-mentioned foaming elastomer interimly towards inside at least.
The 2nd embodiment of the present invention is the foamed rubber member of putting down in writing in above-mentioned the 1st embodiment, it is characterized in that, above-mentioned treatment solution contains at least a kind that is selected from fluorine based polymer, siloxane-based polymers and the polyethers based polymer.
The 3rd embodiment of the present invention is a foamed rubber member, it is characterized in that, the foamed rubber member of putting down in writing in the above-mentioned the 1st or the 2nd embodiment is the roller shape.
The density of the present invention by making isocyanate compound etc. becomes thin from the surface of foaming elastomer interimly towards inside, can dispersive stress, and for the following excellence of distortion.In addition, by making infiltration such as isocyanate compound to inner, stain resistance is also excellent in excellent in te pins of durability.
Description of drawings
[Fig. 1] is the result's of expression test example 1 of the present invention figure.
[Fig. 2] is the result's of expression test example 1 of the present invention figure.
[Fig. 3] is the result's of expression test example 1 of the present invention figure.
[Fig. 4] is the result's of expression test example 1 of the present invention figure.
[Fig. 5] is the result's of expression test example 2 of the present invention figure.
[Fig. 6] is the result's of expression test example 2 of the present invention figure.
Embodiment
Foamed rubber member of the present invention is to use the treatment solution that contains isocyanate compound and organic solvent that foaming elastomer is infiltrated to handle and obtains, and the density of isocyanate compound becomes thin from the surface of above-mentioned foaming elastomer interimly towards inside at least.Thus, obtain the foamed rubber member of wearability, stain resistance excellence.
Wherein, become the state that the density that contains composition (mainly being isocyanate compound) refer to treatment solution reduces towards the inside of foaming elastomer interimly of dredging interimly.Usually, if the treatment solution that contains isocyanate compound is infiltrated up in the foaming elastomer, form then that isocyanate compound infiltrates to the inside of foaming elastomer, the density of isocyanate compound from the surface of foaming elastomer up to inside foamed rubber members uniformly all, and foamed rubber member of the present invention is by the method for regulation, and the density that makes isocyanate compound becomes thin from the surface of foaming elastomer interimly towards inside.The foamed rubber member treatment solution infiltrates and obtains to the inside of foaming elastomer, until inner, the gradient of the density of isocyanate compound can not disappear, and it is thin that isocyanate compound etc. become interimly.Above-mentioned foamed rubber member is owing to become thin mode with isocyanate compound etc. from the surface of foaming elastomer and form interimly towards inside, can be under the nip load of regulation dispersive stress, the following excellence.Can be as foamed rubber member in the past, isocyanate compound all evenly exists in the foaming elastomer, and following reduces or infringement elasticity.In addition, can be as foamed rubber member in the past (patent documentation 3), only the near surface at foaming elastomer is provided with surface-treated layer, has big difference at the nip load lower surface of regulation and inner deflection.
Foamed rubber member preferably forms to the inside of the thickness direction of foaming elastomer by treatment solution is infiltrated.Specifically, treatment solution can infiltrate, and time distortion forms angle (ニ to using foamed rubber member
StarMore than zone プ), for example under the situation that the amount of being absorbed in such as transfer roll is lower, preferably infiltrate to more than 5% of thickness of foaming elastomer, the clearer roller bigger situations of the amount of being absorbed in such as (Network リ one ニ Application グ ロ one Le) is preferably infiltrated to more than 30% of thickness of foaming elastomer.Certainly, as long as the density of isocyanate compound etc. becomes thin from the surface of foaming elastomer towards inside interimly, also can be infiltrated up in the whole foaming elastomer.
Foamed rubber member of the present invention is owing to infiltrate to the inside of the thickness direction of foaming elastomer treatment solution, when being out of shape because of the nip load of regulation, the unreacted component of foaming elastomer inside or electroconductibility give material etc. can stripping to the surface.In addition, compare weather resistance, excellent in wear resistance with the foaming elastomer of infiltration before the treatment solution.In addition, the density by making isocyanate compound at least becomes thin from the surface of foaming elastomer interimly towards inside, can significantly not improve hardness and the characteristic that can keep foaming elastomer is a soft.
Wherein, foaming elastomer forms the rubber substrate foaming.Rubber substrate is not limited especially, for example can enumerate epichloro hydrin rubber, acrylonitrile butadiene rubber (NBR), natural rubber, synthetic polyisoprene, styrene butadiene ribber, divinyl rubber, neoprene, contain viton, chlorinatedpolyethylene, acrylic rubber (ア Network リ Le go system), silicone rubber, ethylene propylene rubber, urethanes, acroleic acid polyurethane rubber etc.These rubber substrates are usefulness also, suitably selects kind, combination according to purposes, purpose.
In addition, can give electroconductibility with the electroconductibility imparting agent to foaming elastomer.As the electroconductibility imparting agent, can use electron conductions such as carbon black, metal-powder give material, ionic conduction give material or mix use them both.Carbon black has the carbon black of various character, but the preferred micropowder end of using.And, when the interpolation carbon black comes the moulding foaming elastomer, preferred fully disperse black carbon.This is because if the compression set of the foaming elastomer of the bad then moulding of dispersity of carbon black easily increases.In addition, when adding a large amount of carbon black, be difficult to compression set is impacted, for example preferably use the little carbon black of oil number, carbon black that particle diameter is big, be difficult for forming structure (ス ト ラ Network チ
ヤOne) carbon black etc.Give material as ionic conductivity, can enumerate organic salt, inorganic salts, metal complex, ionic liquid etc.As organic salt, inorganic salts, can enumerate lithium perchlorate, quaternary ammonium salt, three is fluoridized sodium acetate etc.In addition,, iron halide-ethylene glycol etc. can be enumerated, specifically, the metal complex of putting down in writing in No. 3655364 communique of Japanese Patent can be enumerated as metal complex.On the other hand, ionic liquid is to be under the room temperature to be called as the normal temperature melting salt by the melting salt of liquid, particularly refers to fusing point and be below 70 ℃, preferred normal temperature melting salt below 30 ℃.Specifically, can enumerate the normal temperature melting salt of putting down in writing in the TOHKEMY 2003-202722 communique.
In addition, foaming elastomer can be continuous air bubbles or separated foam, but is preferably continuous air bubbles.By foaming elastomer is continuous air bubbles, and treatment solution easily is infiltrated up in the foaming elastomer, can be shaped to the more excellent foamed rubber member of shape stability.
Foaming elastomer is with above-mentioned rubber substrate and the electroconductibility of adding is as required given material mixing, foaming and moulding, and further mixed foaming agent, frothing aid, vulcanizing agent, vulcanization accelerator, weighting agent wait and carry out moulding.
Treatment solution contains isocyanate compound and organic solvent at least, in other words, dissolves isocyanate compound at least and form in organic solvent.
As the isocyanate compound that contains in the treatment solution, can enumerate 2,6-tolylene diisocyanate (TDI), 4,4 '-diphenylmethanediisocyanate (MDI), to phenylene vulcabond (PPDI), 1,5-naphthalene diisocyanate (NDI) and 3,3-dimethyl diphenyl-4, the polymer of 4 '-vulcabond isocyanate compounds such as (TODI) and above-claimed cpd and modifier etc.Further can enumerate the prepolymer that contains polyvalent alcohol and isocyanic ester.
In addition, treatment solution can contain at least a kind that is selected from fluorine based polymer and the siloxane-based polymers.By these polymkeric substance are engaged in the treatment solution, when for example foamed rubber member being used for feed roll etc., can suppress adhering to of toning agent, paper powder etc.Thus, suppress the obstruction of bubble (cell) on the surface of foamed rubber member, characteristic that can the long term maintenance foamed rubber member.
Fluorine based polymer and siloxane-based polymers are preferably in the organic solvent that dissolves in regulation and can react and chemically combined polymkeric substance with isocyanate compound, as the fluorine based polymer, can enumerate vinylformic acid fluorine based polymer, as siloxane-based polymers, can enumerate vinylformic acid silica methane series polymkeric substance.Vinylformic acid fluorine based polymer for example is the fluorine based polymer with solvent soluble of hydroxyl, alkyl or carboxyl, can enumerate segmented copolymer or derivatives thereof of for example acrylate and vinylformic acid fluorinated alkyl esters etc.In addition, vinylformic acid silica methane series polymkeric substance is the siloxane-based polymers of solvent soluble, can enumerate segmented copolymer or derivatives thereof of for example acrylate and silicon Acrylote oxyalkyl ester etc.
In addition, treatment solution can contain the polyethers based polymer.Wherein, the polyethers based polymer preferably dissolves in the organic solvent, be preferably in addition have active hydrogen, can with isocyanate compound reaction and chemically combined polyethers based polymer.
As preferred polyethers based polymer, for example can enumerate epichloro hydrin rubber with active hydrogen.Wherein so-called epichloro hydrin rubber refers to the not rubber of sulfided state.Epichloro hydrin rubber is owing to can give electroconductibility and elasticity simultaneously and preferred to foamed rubber member.The epichloro hydrin rubber end has active hydrogen (hydroxyl), but preferably has the active hydrogen of hydroxyl, allyl group etc. in the unit.As epichloro hydrin rubber, can enumerate Epicholorohydrin homopolymer, Epicholorohydrin-ethylene oxide copolymer, Epicholorohydrin-allyl glycidyl ether multipolymer, Epicholorohydrin-oxyethane-allyl glycidyl ether terpolymer or derivatives thereof etc.
As other preferred polyethers based polymer with active hydrogen, can enumerate and have hydroxyl or allylic polymkeric substance, can enumerate for example polyvalent alcohol, dibasic alcohol etc.This polyethers based polymer is compared with the situation that has the group that contains active hydrogen at two ends, only is preferably to have the situation of the group that contains active hydrogen at an end.In addition, preferred number average molecular weight is 300～1000.This is owing to can give elasticity to foamed rubber member.As this polyethers based polymer, can enumerate for example polyalkylene glycol monomethyl ether, polyalkylene glycol dimethyl ether, allylation polyethers, polyalkylene glycol glycol, polyalkylene glycol triol etc.By add the polyethers based polymer in treatment solution, the flexibility of foamed rubber member or intensity improve, thereby can be with the surface abrasion of foamed rubber member or can not damage the antithesis parts.
When using silicone rubber as rubber substrate, preferably treatment liquid contains the reactive compounds that has intermiscibility with silicone rubber.The reactive compounds that has an intermiscibility with silicone rubber refer to intermiscibility with silicone rubber good, can with the compound of silicone rubber or isocyanate compound reaction.Compare with using only to contain, contain the treatment solution that this and silicone rubber have the reactive compounds of intermiscibility and easily be infiltrated up in the elastic layer with the situation of the treatment solution of the low isocyanate compound of the intermiscibility of silicone rubber.As reactive compounds, can enumerate siliceous compound, hydrocarbon compound etc., be preferably siliceous compound especially.As siliceous compound, be preferably the compound with siloxane bond, silane coupling agent, functional silane, silylating agent etc., be preferably the compound with siloxane bond, silane coupling agent with alkoxysilyl with chloromethane silylation or silazane with alkoxysilyl.As compound, can enumerate liquid polyorganosiloxane, silicate, the aforesaid propylene acid siloxane-based polymers of terminal-modified dimethyl siloxane, condensed type and add-on type etc. with siloxane bond.Certainly, the compound with siloxane bond can have alkoxysilyl endways.In addition, the reactive compounds that has intermiscibility with silicone rubber is preferably the compound that reacts with isocyanate compound, preferably has hydroxyl, amino, isocyanate group etc.This be since by with the isocyanate compound Chemical bond, can form the more excellent foamed rubber member of intensity.This is not ooze out owing to not producing so in addition.But, under the situation of silane coupling agent, then react and deficient in stability easily if having active hydrogen, so preferably have isocyanate group with isocyanate compound with alkoxysilyl.
In treatment solution, give material as electroconductibility, can further add electron conductions such as above-mentioned carbon black, metal-powder give material, ionic conductivity give material or mix add them both.
In addition, fluorine based polymer and siloxane-based polymers in the treatment solution preferably with respect to isocyanate compound 100 mass parts, cooperate fluorine based polymer and siloxane-based polymers 2～30 mass parts altogether.If be less than 2 mass parts, then the effect that carbon black etc. is remained in the foamed rubber member reduces.On the other hand, the problem that discharge characteristic reduces if amount of polymers more than 30 mass parts, then exists the resistivity of foamed rubber member to rise, or isocyanate compound relatively reduces and the problem of the processing of can not infiltrating effectively.
Organic solvent is so long as dissolving isocyanate compound and these fluorine based polymers, siloxane polymer and the polyethers based polymer that contain as required and not getting final product with the organic solvent of isocyanate compound reaction, for example can enumerate ethyl acetate, methyl ethyl ketone (MEK), methyl iso-butyl ketone (MIBK) (MIBK), toluene etc.Organic solvent is preferably the organic solvent that easily is infiltrated up in the foaming elastomer, preferably suitably selects according to the kind of the rubber substrate of foaming elastomer.
The concentration of isocyanate compound in the treatment solution does not then limit especially so long as can significantly not reduce the concentration of the mechanical characteristics of foaming elastomer.The concentration of isocyanate compound is different and different according to the combination of rubber substrate and organic solvent, coating process etc. in the treatment solution, for example is 0.1～20 quality %, more preferably about 0.1～10 quality %.And, low more then easy more being infiltrated up in the foaming elastomer of the concentration of isocyanate compound in the treatment solution, that is, and the trend that exists the infiltration degree of depth to deepen.If the concentration of isocyanate compound is too high, then excessively form crosslinking structure described later in the inside of foaming elastomer, compare with the foaming elastomer before the infiltration treatment solution, exist hardness significantly to increase or stress rises and possibility that caoutchouc elasticity reduces.
Manufacture method to foamed rubber member of the present invention describes.
With the rubber substrate foaming is foaming elastomer.Then,, use the processing of infiltrating of the treatment solution contain isocyanate compound and organic solvent at least, form foamed rubber member thus this foaming elastomer.At this moment, the density that makes isocyanate compound etc. becomes thin from the surface of foaming elastomer interimly towards inside.
Wherein, infiltration handle refer to make treatment solution be infiltrated up in the foaming elastomer after, remove organic solvent, make isocyanate compound etc. contain the composition solidified and handle.Be infiltrated up to the isocyanate compound in the foaming elastomer,, form their crosslinking structure in the inside of foaming elastomer with other isocyanate compound, other the reactions such as rubber substrate that contain composition (fluorine based polymer etc.), formation foaming elastomer.Thus, compare, form the foamed rubber member of excellent in wear resistance with the foaming elastomer before the infiltration treatment solution.
As making treatment solution be infiltrated up to method in the elastomerics, can enumerate the method for dipping (dipping) foaming elastomer in treatment solution, to the method for foaming elastomer spray treatment liquid etc.The infiltration degree of depth of treatment solution is suitably adjusted according to the concentration of treatment solution or the intermiscibility of temperature, treatment time, foaming elastomer and organic solvent etc.In addition, during dipping, can adjust by foaming elastomer being flooded in treatment solution to the required degree of depth.
Become thin infiltration as the density that makes isocyanate compound interimly and handle, for example can enumerate behind coating treatment solution on the foaming elastomer, make solidified methods such as isocyanate compound after the rotation specified time.By the rotation specified time, what be infiltrated up to treatment solution in the foaming elastomer contains composition (mainly being isocyanate compound etc.) diffusion, forms from elastomeric surface and to become thin state towards inside interimly.
As other method, can enumerate the infiltration processing of carrying out repeatedly treatment solution being infiltrated up to the operation in the foaming elastomer.At this moment, adjust so that the infiltration degree of depth of treatment solution shoals on thickness direction successively.For example, infiltrate 3 times the time, towards inside, form the position of position, treatment solution infiltration 1 time of position, the treatment solution infiltration 2 times of treatment solution infiltration 3 times from the surface of foaming elastomer.That is, the infiltration amount of treatment solution reduces towards inside gradually from elastomeric surface, and the density of formation isocyanate compound etc. becomes thin state interimly.Wherein, describe as an example with the situation of foaming elastomer 3 times that treatment solution is infiltrated, but the number of times that makes treatment solution infiltration foaming elastomer is not limited especially, can be for more than 2 times or 4 times.In addition, in the operation of the treatment solution that repeatedly infiltrates, all identical treatment solutions can be used, also different treatment solutions can be used.As different treatment solutions, for example can enumerate, the treatment solution that the concentration of isocyanate compound is different, isocyanate compound etc. contain at least a different treatment solution of composition and organic solvent.When using the different treatment solution of the concentration of isocyanate compound,, easily treatment solution is infiltrated to foaming elastomer inside, and the density that can more easily form isocyanate compound etc. becomes thin state interimly by the order infiltration that diminishes with concentration.
And the operation of this infiltration treatment solution can be carried out after the infiltration treatment solution make curing such as elastomeric isocyanate compound once more.That is, can make curing such as isocyanate compound after more than 2 times, or make solidified operation such as isocyanate compound behind the treatment solution that repeats to infiltrate at the infiltration treatment solution.When making treatment solution be infiltrated up in the elastomerics, preferred repeat behind the infiltration treatment solution, to make solidified such as elastomeric isocyanate compound to operate the processing of infiltrating by dipping.This is owing to the strippings in the treatment solution that uses subsequently such as isocyanate compound that can prevent to be infiltrated up to like this in the elastomerics.In addition, when the infiltration treatment solution makes after more than 2 times isocyanate compound etc. solidify, can place the specified time in the back more than 2 times, be cured after making the treatment solution diffusion at the infiltration treatment solution.By placing the specified time, the density that can form isocyanate compound etc. slowly becomes the state of dredging.
Solidified methods such as isocyanate compound are not limited especially, the method that is cured after the following temperature of the zero pour that is cooled to isocyanate compound etc. arranged, by the moisture in the environmental gas, the method that is cured by heat or moisture under reduced pressure behind the solvent flashing,, generally be behind Air drying, carry out heat treated as required.The Heating temperature of this moment for example is 40～150 ℃.
By aforesaid method, the density of formation isocyanate compound etc. becomes thin foamed rubber member from the surface of foaming elastomer interimly towards inside.This foamed rubber member when keeping the mechanical characteristics of foaming elastomer (for example, soft, low-gravity, caoutchouc elasticity), wearability, stain resistance excellence.In addition, for the following excellence of being out of shape.
In addition, the stress rate of rise of the foaming elastomer before foamed rubber member is handled with respect to infiltration is preferably below 50%, more preferably below 20%.If bigger than this value, then the caoutchouc elasticity that had originally of foaming elastomer significantly reduces.
In addition, the foamed rubber member preferred hardness is measured as scope below 40 ° with Asker C.
Foamed rubber member of the present invention is particularly suitable for various paper feedings that carry out paper feeding, transmission in the various OA apparatuses such as duplicating machine, facsimile recorder, various printers etc. and transmits in the charged roller used in the roller of usefulness or the image processing system, transfer roll, developer roll, the conductive roll etc.
Below the present invention will be described based on embodiment.But, the invention is not restricted to this.
(foaming elastomer 1)
To 3 functional polyethers is to add water, suds-stabilizing agent (whole bubble drug) in polyvalent alcohol MN-3050 (Mitsui Chemicals Port リ ウ レ タ Application society system) 100 mass parts and mix, in this mixture, add コ ス モ ネ one ト T-80 (Mitsui Chemicals Port リ ウ レ タ Application society system) 50 mass parts, be injected into the axle (shaft) that is provided with φ 6mm in advance and be preheated in 60 ℃ the mould, heated 60 minutes, and obtained roller thus.With the polishing of the roller that obtains, cut off, obtaining expansion ratio with external diameter φ 18mm * internal diameter φ 6mm * width 320mm is 30.0 times foaming elastomer 1.
(foaming elastomer 2)
In epichloro hydrin rubber (ECO) 100 mass parts, add sulphur 1.0 mass parts as vulcanizing agent, as Cellmic C 121 (ADCA) 6.8 mass parts of whipping agent, as carbamide compound 5.4 mass parts of frothing aid, and carry out mixing, mixing with roll mixer, be extruded into type, be assemblied on the axle (shaft) of φ 6mm, under 160 ℃ * 1 hour condition, vulcanize, foam, obtain roller thus.Roller polishing, cut-out with obtaining obtain the foaming elastomer 2 of 3.0 times of expansion ratios with external diameter φ 18mm * internal diameter φ 6mm * width 6mm.
(embodiment 1)
In the 2-methyl-2-pyrrolidone, add isocyanate compound (MDI) and mix, prepare the treatment solution of 10 quality % concentration.Remain on after treatment solution 25 ℃ under makes its infiltration for 2 times to foaming elastomer 1 spraying of side direction rotation with atomizer, placement is 5 minutes in the time of rotation foaming elastomer 1.Then, further, remove unnecessary treatment solution thus with foaming elastomer 1 high speed rotating.With this foaming elastomer 1 seasoning 1 hour, further heating made it solidify in 1 hour in remaining on 120 ℃ baking oven, obtained the bipeltate roller of embodiment 1.
(embodiment 2)
ユ ニ ロ イ ヤ Le ケ ミ カ Le society system) and mix in toluene, add isocyanate prepolymer (VIBRATHANE8585:, the treatment solution of preparation 1% and 5% concentration, on the other hand, in the 2-methyl-2-pyrrolidone, add isocyanate compound (MDI) and mix, prepare the treatment solution of 10 quality % concentration.Then with atomizer after the treatment solution that foaming elastomer 1 spraying of side direction rotation remains on 25 ℃ 1 quality % concentration makes its infiltration for 2 times, placed 5 minutes in the time of rotation foaming elastomer 1.Then, further, remove unnecessary treatment solution thus with foaming elastomer 1 high speed rotating.After repeating this operation with the treatment solution of 5 quality %, 10 quality % concentration, with foaming elastomer 1 seasoning 1 hour, further heating made it solidify in 1 hour in remaining on 120 ℃ baking oven, obtained the bipeltate roller of embodiment 2.
(embodiment 3)
In ethyl acetate, add isocyanate compound (MDI) and mix, prepare the treatment solution of 1 quality %, 5 quality %, 10 quality % concentration.Then the foaming elastomer 2 of side direction rotation dipping in remaining on 25 ℃ the treatment solution of 1 quality % concentration after 10 seconds, is mentioned foaming elastomer 2 from liquid level to the position of the surperficial 4.5mm of distance, further high speed rotating is removed unnecessary treatment solution thus.After repeating this operation with the treatment solution of 5%, 10% concentration, with foaming elastomer 2 seasoninies 1 hour, further heating made it solidify in 1 hour in remaining on 120 ℃ baking oven, obtained the bipeltate roller of embodiment 3.And when utilizing the treatment solution of 5 quality % concentration, infiltration is to the position apart from the surperficial 3mm of foaming elastomer 2, and when utilizing the treatment solution of 10 quality % concentration, infiltration is to the position apart from the surperficial 1.5mm of foaming elastomer 2.
(embodiment 4)
In ethyl acetate, add isocyanate compound (MDI) and mix, prepare the treatment solution of 10 quality % concentration.Then,, after making its infiltration for 2 times, placed 5 minutes in the time of rotation foaming elastomer 2 treatment solution of the foaming elastomer 2 sprayings 10 quality % concentration of side direction rotation with atomizer.Then, further high speed rotating is removed unnecessary treatment solution.With foaming elastomer 2 seasoninies 1 hour, further heating made it solidify in 1 hour in remaining on 120 ℃ baking oven, obtained the bipeltate roller of embodiment 4 thus.
(comparative example 1)
In ethyl acetate, add isocyanate compound (MDI) and mix, the treatment solution for preparing 20 quality % concentration, whole foaming elastomer 1 is immersed in 30 seconds next substituting with this treatment solution of atomizer spray in the treatment solution, in addition operate similarly to Example 1, obtain the bipeltate roller of comparative example 1.
(comparative example 2)
Except the concentration that makes treatment solution is 1%, similarly operate with comparative example 1, obtain the foaming roller of comparative example 2.
(comparative example 3)
Except using atomizer spray polyurethane coating (ネ オ レ
StarStar R-940, nanmu originally change into society's system) form outside the coating for 2 times, operate similarly to Example 3, obtain the bipeltate roller of comparative example 3.
The evaluation of (test example 1) mechanical characteristics
The bipeltate roller of foaming elastomer 1～2, each embodiment and each comparative example is compressed 25% on thickness direction, measure the stress that apply this moment.
In addition, the variation in thickness at each position on the diametric(al) of affirmation roller at this moment.Specifically, with the part of the surface 0～2mm of bipeltate roller as top, with the part of the surface 2～4mm of roller as central part, with the part of the surface 4～6mm of roller as the bottom, be determined at the thickness at 25% o'clock each position of compression on the thickness direction.The result is shown in table 1～2 and Fig. 1～4.
(test example 2) long duration test
The foaming roller that makes foaming elastomer 1～2, each embodiment and each comparative example under NN environment (25 ℃, 50%RH) with the amount of being absorbed in and photoreceptor butt of 3mm, rotate 100,000 change after, measure the external diameter of roller, obtain the external diameter variable quantity of roller.In addition, observe the state of roller at this moment and the state of photoreceptor.The result is shown in table 1～2 and Fig. 5～6.
(test example 3) test for contamination
The foaming roller that makes foaming elastomer 1～2, each embodiment and each comparative example with the amount of being absorbed in and photoreceptor butt of 3mm, keeps after 14 days under HH environment (50 ℃, 90%RH), and the affirmation photosensitive surface has pollution-free.With the unpolluted situation of photosensitive surface as zero, will be almost untainted situation as △, with situation about polluting as *.The result is shown in table 1～2.
[table 1]
[table 2]
(test-results summary)
The stress of the bipeltate roller of embodiment 1 is about 1.1 times of foaming elastomer 1.In addition, for because of the variation of the thickness of the distortion that caused of the compression order with top, central part, bottom slowly reduces, confirm that stress obtains disperseing, roller is whole to keep soft.External diameter variable quantity in the long duration test is 0.22mm, confirms to compare with foaming elastomer 1, and weather resistance improves more than 2 times.
Confirm by spray treatment liquid, make isocyanate compound etc. slowly become the bipeltate roller of the embodiment 2 that dredges in infiltration back rotation specified time repeatedly, compare with the bipeltate roller of embodiment 1, the rising of stress is further suppressed, the external diameter variable quantity further reduces, and weather resistance further improves.
In addition, embodiment 1 and 2 bipeltate roller are all unconfirmed in test for contamination a pollution.
Therewith relatively, make treatment solution be infiltrated up to the bipeltate roller of the comparative example 1 in the whole foaming elastomer, can not keep whole roller softness, stress significantly rises as a result, confirms to have photosensitive surface to produce damage in endurance test.
For the damage of the rising that prevents stress or photosensitive surface and to make the concentration of treatment solution be in the comparative example 2 of 1 quality %, stress and foaming elastomer 1 equal extent, in long duration test, photosensitive surface unconfirmed produces damage, but the external diameter variable quantity only improves 1.2 times with respect to foaming elastomer 1, and, in test for contamination, comparative example 1,2 is not all found the pollution of photosensitive surface.
On the other hand, foaming elastomer is immersed in the treatment solution bipeltate roller of the embodiment 3 that repeatedly forms, confirms that stress is about 1.1 times of foaming elastomer 2, weather resistance is brought up to more than 3 times of foaming elastomer 2.In addition, in test for contamination, do not see the pollution of photosensitive surface.
In addition, only near surface has been carried out the embodiment 4 that handles, owing to can keep whole rubber rollers softness, stress is low, and in long duration test, the external diameter variable quantity is also little.But because the amount of being absorbed in is bigger than the elastomeric thickness of handling, in test for contamination, unprocessed portion contacts with photoreceptor, found that photoreceptor is polluted a little.
In addition, have the bipeltate roller of the comparative example 3 of coating, because roller is whole soft, stress is low, and the external diameter variable quantity in the long duration test is also few, in test for contamination, does not see pollution at photosensitive surface.But, because coating is significantly different with the hardness of foaming elastomer,, can not fully follow each other for distortion (rotation), the result finds to have be full of cracks at the near interface of foaming elastomer and coating.
Claims (3)
1. foamed rubber member, it is characterized in that, be to use the treatment solution that contains isocyanate compound and organic solvent that foaming elastomer is infiltrated to handle and obtain, the density of isocyanate compound becomes thin from the surface of described foaming elastomer interimly towards inside at least.
2. foamed rubber member as claimed in claim 1 is characterized in that, described treatment solution contains at least a kind that is selected from fluorine based polymer, siloxane-based polymers and the polyethers based polymer.
3. foamed rubber member is characterized in that, foamed rubber member as claimed in claim 1 is the roller shape.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008207409A JP5354567B2 (en) | 2008-08-11 | 2008-08-11 | Foam rubber material |
| JP2008207409 | 2008-08-11 | ||
| JP2008-207409 | 2008-08-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101649063A true CN101649063A (en) | 2010-02-17 |
| CN101649063B CN101649063B (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910166087 Active CN101649063B (en) | 2008-08-11 | 2009-08-11 | Foaming rubber part |
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| JP (1) | JP5354567B2 (en) |
| CN (1) | CN101649063B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023114907A1 (en) * | 2021-12-15 | 2023-06-22 | Bridgestone Americas Tire Operations, Llc | Cellular natural rubber articles |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1967400A (en) * | 2005-11-16 | 2007-05-23 | 北辰工业株式会社 | Conductive rubber member |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4193193B2 (en) * | 2001-10-16 | 2008-12-10 | シンジーテック株式会社 | Conductive roll |
| JP2004191961A (en) * | 2002-11-29 | 2004-07-08 | Hokushin Ind Inc | Conductive roll |
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- 2008-08-11 JP JP2008207409A patent/JP5354567B2/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1967400A (en) * | 2005-11-16 | 2007-05-23 | 北辰工业株式会社 | Conductive rubber member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5354567B2 (en) | 2013-11-27 |
| CN101649063B (en) | 2013-08-21 |
| JP2010042896A (en) | 2010-02-25 |
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Effective date of registration: 20160707 Address after: Tokyo, Japan, the port district, Zhi Zhi, Ding Ding, No. 12, No. 15 Patentee after: Nitto Kogyo KK Address before: Tokyo, Japan Patentee before: Nitto Kogyo KK |