Detailed description of the invention
OA roller of the present invention, it is characterized in that, its coating be provided with Coating agent on metallic roller main body outer peripheral face after, resin glue being solidified to form, described coating agent contains the amino resin of resin glue, pigment and the resin cross-linking agent as described adhesive agent with curability, relative to resin glue described in 100 mass parts, described pigment is below more than 25 mass parts, 120 mass parts, and described amino resin is below more than 15 mass parts, 55 mass parts.
And, coating agent for the formation of described coating of the present invention, it is characterized in that, it contains the amino resin of resin glue, pigment and the resin cross-linking agent as described adhesive agent with curability, relative to resin glue described in 100 mass parts, described pigment is the pigment of below more than 25 mass parts, 120 mass parts, and described amino resin is below more than 15 mass parts, 55 mass parts.
Described resin glue can use to be had curability and can improve the various resins of crosslink density by reacting with the amino resin as crosslinking agent, particularly preferably is waterborne polyurethane resin.Coating agent containing described waterborne polyurethane resin, is formed owing to using water as solvent, therefore, it is possible to reduce the burden to environment.
Described waterborne polyurethane resin, the Sanyo that such as can enumerate as polycarbonate polyurethane resin water-based emulsion changes into PERMARIN (registered trade mark (RTM)) UA-300, UA-310, UA-368 that industry (strain) is produced; For the PERMARINUA-50 being all the said firm's production of EU resin aqueous solution; For PERMARINUA-150, UC-20 of being all the said firm's production of EU resin emulsion; SUPERFLEX (registered trade mark (RTM)) E-4000's that the first industrial pharmaceutical (strain) being similarly EU resin emulsion is produced etc. is one kind or two or more, but not limited.
As amino resin, such as, can enumerate melamine resin, urea formaldehyde resin, guanamine resin etc., the various amino resins of the function as described waterborne polyurethane resin crosslinking agent can be played.
Described amino resin, such as, can enumerate the CYMEL (registered trade mark (RTM)) 323,325,327,328,385 that the Cytec company for the high imino group melamine resin solution that methylates produces; For the CYMEL370,373,3749 being all the said firm's production of partial methylation melamine resin solution; For the U-VAN (registered trade mark (RTM)) 120 that the Mitsui Chemicals (strain) of normal-butyl melamine resin solution is produced; Or change into the one kind or two or more of the MELAN (registered trade mark (RTM)) 552 that (strain) produce etc. for the Hitachi of MEE melamine resin solution, but not limited.
The content of described amino resin must be below more than 15 mass parts, 55 mass parts relative to 100 mass parts resin glues.
When content is less than described scope, cannot obtain because of bring containing amino resin, the crosslink density that improves resin glue, prevent coating particularly in high temperature, the distortion of high humidity environment lower part or bond on band etc. or effect that bonding coating is peeled off from roller main body outer peripheral face.
In addition, when content exceedes described scope, make the crosslink density of resin glue become too high, coating be become really up to the mark simultaneously on the contrary, reduce the friction coefficient on surface thus, easily slide with band etc.
In addition, even if in any one situation described, coating also has for the adhesiveness of roller main body outer peripheral face the tendency slightly reduced.
And, while considering to form a kind of appearance more effectively suppressing the problems referred to above, for the coating that the adhesiveness of described metallic roller main body outer peripheral face is also excellent, then the content of amino resin is also preferred in described scope is below more than 25 mass parts, 45 mass parts relative to 100 mass parts resin glues.
And, while resin glue uses previously described emulsion or the aqueous system, when amino resin uses previously described solution, the content of described amino resin refer to relative to the solid constituent (resin glue) in emulsion described in 100 mass parts or the aqueous system, the mass parts of solid constituent (amino resin) in solution.
Pigment is preferably the previously described filler pigment with excellent film contractive effect when preventing resin glue from solidifying.
Described filler pigment, such as, can enumerate the one kind or two or more of the clays such as kaolin or blanc fixe, calcium carbonate, aluminium hydroxide, magnesium carbonate, talcum, mica etc.
The content of described pigment must be below more than 25 mass parts, 120 mass parts relative to 100 mass parts resin glues.
When content is less than described scope, cannot obtain because of bring containing pigment, relax resin glue solidification time film contraction, improve solidification after coating the adhesiveness of metallic roller main body outer peripheral face prevented to the effect peeled off.
In addition, when content exceedes described scope, coating becomes fragile, and easily on the contrary peels off from roller main body outer peripheral face.
And, consider that forming one more effectively prevents the problems referred to above, have the good adhering coating to described metallic roller main body outer peripheral face, then the content of pigment is preferred in described scope is below more than 45 mass parts, 100 mass parts relative to 100 mass parts resin glues.
In addition, also preferably there is as pigment the pigment of nadel.Wherein, the pigment of the three-dimensional shape that the nadel preferably with more than 2 is radially given prominence to from center, such as, be preferably 4 nadels from center mutually with the pigment etc. of equal angles so-called four pins (tetrapick) shape outstanding to 4 directions.
Described pigment such as can enumerate the one kind or two or more of zinc oxide, magnesium oxide, aluminium borate, carborundum, silicon nitride, potassium titanate, basic magnesium sulfate, calcium sulphate, Sodium calcium phosphate, antifungin, calcium carbonate, titanium diboride, gypsum, aluminium oxide, asbestos, sepiolite or xonolite etc.In addition, can also be husky etc. the compound of the star that produced from Okinawa Prefecture.
Wherein, the preferred described ZnOw in four needle-likes.
Described pigment to be imbedded in coating with at least 1 in upper process and has been given play to anchor effect due to 2, therefore, it is possible to prevent because of the stimulation of band, the coming off of pigment caused of wearing and tearing, and, residue projection is given prominence to from coating surface as microspike, by improving the friction coefficient of OA roller with the scratch effect be with, play the effect of great friction coefficient described in long term maintenance simultaneously.Therefore, it is possible to the longer time maintains the superperformance of OA roller.
But, described pigment can also to be entirety the be needle-like of one.
And, when resin glue uses previously described emulsion or the aqueous system, the content of described filler pigment or the pigment with nadel etc. refers to the mass parts of the pigment relative to the solid constituent (resin glue) in emulsion described in 100 mass parts or the aqueous system.
In addition, as pigment, pigment different for the several functions such as described filler pigment, the pigment with nadel can also be used.At this moment, due to the synergism of the function of described each pigment, the superperformance of OA roller can be maintained for more time.And the used time, the content of pigment refer to and pigment of more than two kinds summation, mass parts in the middle of solid constituent described in every 100 mass parts, it need in the scope that the present patent application specifies.
In coating agent, except described each composition, the existing known various additives such as defoamer, dispersion stabilizer, surface tension modifier can also be contained with arbitrary proportion.
From reduction to the burden of environment, coating agent preferably makes the water-based system of solvent as previously explained of water.
Such as, when adopting as resin glue the material provided with the state of previously described water-based emulsion or the aqueous system, in described emulsion or the aqueous system, add the content that pigment and amino resin reach described regulation, add other additive as required simultaneously, just can obtain described aqueous coating agent.
Further, the component solvent of water or water and water-miscible organic solvent can also be added as required, thus regulate the viscosity of coating agent.
By described coating agent, be applied to such as by the metal cylindrical shapes such as aluminium, copper, brass, corrosion-resistant steel and even columned roller main body outer peripheral face with arbitrary coating processs such as spray paintinges, then the dry solvent except to anhydrate etc., heating makes resin glue generation curing reaction again, carry out cross-linking reaction by the effect of the amino resin as crosslinking agent simultaneously, thus formation coating, obtain OA roller.
The surface of described OA roller relative to the coefficientoffrictionμ of the band combined with it preferably more than 0.3, particularly preferably in more than 0.6.When coefficientoffrictionμ is less than described scope, and easily occur sliding between band, the described band of driving that likely cannot be good.
Further, in the present invention, adopt the device shown in Fig. 1, carry out measuring with the measuring method of band formula according to Euler and the value that obtains represents coefficientoffrictionμ.
By the OA roller 3 forming coating 2 on the outer peripheral face of metallic roller main body 1 as previously described, remained and can be rotated according to the direction in figure shown in dash-double-dot arrow with the state of the center shaft 4 of described roller main body 1 towards horizontal direction.Further, keep constant state that force indicator 5 is set on the side of OA roller 3 with the distance of the center shaft 4 with described OA roller 3.
Then, other end one end having been installed the band 7 of the hammer 6 of quality W (g) is connected on described force indicator 5, simultaneously fall to the state than OA roller 3 more below with the one end of hammer 6 side making described band 7, described band 7 is contacted with the coating 2 of described OA roller 3 in the scope of the angle θ (°) centered by center shaft 4.
Then, with force indicator 5 measure by OA roller 3 by direction shown in described dash-double-dot arrow, rotate with certain speed time produce load F (g), with quality W (g) and the angle θ (°) of described load F (g), hammer 6, through type (1) tries to achieve coefficientoffrictionμ.
μ＝(1/θ)ln(F/W)(1)
The coating thickness forming the coating agent of coating is preferably more than 20 μm, less than 100 μm.
When coating thickness is less than described scope, possibly cannot form the uniform coating of thickness.
In addition, when coating thickness exceedes described scope, may occur that stream pendant waits and the degraded appearance of coating, and the operability of drying property etc. may be reduced.
Described OA roller of the present invention can be suitable in the OA machine of such as electrostatic duplicator, laser printer, plain paper facsimile and their all-in-one etc., as the driven roller for rotary actuation tapes, transfer belt, intermediate transfer belt etc.
The preparation of the coating agent in following examples, comparative example, the making of OA roller and test, except special record, be 23 ± 5 DEG C, carry out under the environment of relative humidity 55 ± 5%.
Embodiment 1
PERMARINUA-300 (the water-based emulsion of polycarbonate polyurethane resin that industry (strain) produces is changed in aforesaid Sanyo, solid content 38 quality %) in, coordinate the CYMEL327 (isobutanol solution of the high imino group melamine resin that methylates that previously described Cytec company produces, solid content 88 ~ 92 quality %) and clay (hydrous kaolin type, the ASP-170 that BASF AG produces), modulate coating agent.
In described coating agent, the content of the described clay in the middle of the polycarbonate polyurethane resin as resin glue (solid constituent of PERMARINUA-300) of every 100 mass parts is 65 mass parts, the content of the high imino group melamine resin (solid constituent of CYMEL327) that methylates is 36 mass parts.
Described coating agent is applied on aluminium (A6063) the matter roller main body outer peripheral face that external diameter is 24 φ, length is 22.6mm with spray painting, at room temperature leave standstill about 30 minutes and make it dry, then at 90 DEG C after predrying 10 minutes, heat 15 minutes at 140 DEG C, resin glue is made to occur solidify and carry out cross-linking reaction and form coating, obtained OA roller.
Embodiment 2 ~ 5, comparative example 1 ~ 3
Except the content as the described clay in the middle of the polycarbonate polyurethane resin of resin glue of every 100 mass parts being changed into except 10 mass parts (comparative example 1), 20 mass parts (comparative example 2), 25 mass parts (embodiment 2), 45 mass parts (embodiment 3), 100 mass parts (embodiment 4), 120 mass parts (embodiment 5), 150 mass parts (comparative example 3), identical with embodiment 1, thus preparation coating agent, obtained OA roller.
Embodiment 6 ~ 9, comparative example 4,5
Except the content as the high imino group melamine resin that methylates in the middle of the polycarbonate polyurethane resin of resin glue of every 100 mass parts is changed into except 10 mass parts (comparative example 4), 15 mass parts (embodiment 6), 25 mass parts (embodiment 7), 45 mass parts (embodiment 8), 55 mass parts (embodiment 9), 60 mass parts (comparative example 5), identical with embodiment 1, thus preparation coating agent, obtained OA roller.
Embodiment 10
Except the CYMEL370 (isobutanol solution of partial methylation melamine resin, solid content 86 ~ 90 quality %) produced with Cytec company replaces beyond CYMEL327, identical with embodiment 1, thus preparation coating agent, obtained OA roller.
Every 100 mass parts in described coating agent are 36 mass parts as the content of the partial methylation melamine resin (solid constituent of CYMEL370) in the middle of the polycarbonate polyurethane resin (solid constituent of PERMARINUA-300) of resin glue.
Comparative example 6
Except CARBODILITE (registered trade mark (RTM)) E-02 (water-based emulsion of polycarbodiimide produced with the Nisshinbo chemistry (strain) belonging to different types of crosslinking agent with amino resin, solid content 40 quality %) replace beyond CYMEL327, identical with embodiment 1, thus preparation coating agent, obtained OA roller.
Every 100 mass parts in described coating agent are 36 mass parts as the content of the polycarbodiimide (solid constituent of CARBODILITEE-02) in the middle of the polycarbonate polyurethane resin (solid constituent of PERMARINUA-300) of resin glue.
Comparative example 7
Except ELASTRON (registered trade mark (RTM)) BN69 (solution of blocked isocyanate compound produced with the first industrial pharmaceutical (strain) belonging to different types of crosslinking agent with amino resin, solid content 40 quality %) replace beyond CYMEL327, identical with executing example 1, thus preparation coating agent, obtained OA roller.
Every 100 mass parts in described coating agent are 36 mass parts as the content of the blocked isocyanate compound (solid constituent of ELASTRONBN69) in the middle of the polycarbonate polyurethane resin (solid constituent of PERMARINUA-300) of resin glue.
High temperature, high wet test
Forming described each embodiment, the outer peripheral face of OA roller obtained in comparative example, on coating surface, under the state of the band of direct contact polyimide, by described tape wrapping on the outer peripheral face of OA roller, leave standstill after 7 days under the high temperature, high humidity environment of temperature 60 C, relative humidity 80%, observe its state, and by following standard, coating is evaluated.
Zero: coating do not occur portion deforms or with band etc. bonding.
×: there is portion deforms or bonded on band etc. in coating.
Adhesiveness test
To the adhesiveness of the coating in OA roller obtained in described each embodiment, comparative example, test according to test method disclosed in JES Japan Engineering Standards JISK5600-5-6:1999 " coating ordinary test method-5: engineering properties-Section 6 of film: tack (cross patterning method (crosscut) method) ", and test results is evaluated.That is, test results is divided into 6 grades according to the table 1 in JISK5600-5-6,0 ~ 2 grade be judged to be good adhesion, 3 ~ 5 grades be judged to be that adhesiveness is bad.
Measuring friction coefficient
By described formula (1) from the friction coefficient of coating surface relative to the band of described polyimide measuring the result obtained with previously described Fig. 1 device and to try to achieve described each embodiment, comparative example obtained OA roller.
Above result as shown in Table 1 to Table 3.
Table 1
Table 2
Table 3
From the result of the embodiment 1 ~ 10 of table 1 ~ 3 and the comparative example 6,7 of table 3, during with amino resin as crosslinking agent, good cross-linked structure can be imported in the coating, can prevent coating under high temperature, high humidity environment from occurring portion deforms or bond on band etc. or situation that bonding coating is peeled off from roller main body outer peripheral face.
In addition, from the embodiment 1 ~ 5 of table 1 and the result of comparative example 1 ~ 3, content as the clay of pigment is being must more than 25 mass parts, below 120 mass parts, particularly preferably be below more than 45 mass parts, 100 mass parts relative to 100 mass parts resin glues.
And, from the result of the embodiment 1,6 ~ 9 of table 2, content as the amino resin of crosslinking agent is being must more than 15 mass parts, below 55 mass parts, particularly preferably be below more than 25 mass parts, 45 mass parts relative to 100 mass parts resin glues.
Embodiment 11 ~ 13
Except replacing the clay (aforementioned ASP-170) as filler pigment with the ZnOw (Pana-Tetra (registered trade mark (RTM)) that Panasonic's (strain) produces) in four needle-likes, make its in relative to 100 mass parts as the polycarbonate polyurethane resin of resin glue be 25 mass parts (embodiment 11), beyond the ratio of 65 mass parts (embodiment 12), 100 mass parts (embodiment 13) contains, identical with embodiment 1, thus preparation coating agent, obtained OA roller.
Embodiment 14
Except using as filler pigment clay (aforementioned ASP-170) with in four needle-likes ZnOw (aforementioned Pana-Tetra) and with except, identical with embodiment 1, thus preparation coating agent, obtain OA roller.Relative to 100 mass parts as the content of two kinds of pigment of the polycarbonate polyurethane resin of resin glue be: clay 30 mass parts, ZnOw 35 mass parts, add up to 65 mass parts.
Embodiment 15
Except changing into relative to the content of 100 mass parts as two kinds of pigment of the polycarbonate polyurethane resin of resin glue: clay 65 mass parts, ZnOw 30 mass parts, add up to except 95 mass parts, identical with embodiment 14, thus preparation coating agent, obtained OA roller.
Comparative example 8
Except changing into relative to the content of 100 mass parts as two kinds of pigment of the polycarbonate polyurethane resin of resin glue: clay 65 mass parts, ZnOw 65 mass parts, add up to except 130 mass parts, identical with embodiment 14, thus preparation coating agent, obtained OA roller.
About OA roller obtained in described each embodiment, comparative example, previously described each characteristic is evaluated.Result is as shown in table 4.
Table 4
From the result of the embodiment 11 ~ 15 of table 4, by containing the pigment with nadel, the friction coefficient of OA roller significantly can be improved.In addition, from the result of described embodiment 11 ~ 15 and comparative example 8, as pigment, no matter be used alone the pigment with nadel or with filler pigments such as clays and use, the content (total amount) of described pigment need be all below more than 25 mass parts, 120 mass parts relative to 100 mass parts resin glues.