CN103555175B - Laser imaging apparatus use development coating and laser imaging apparatus developer roll - Google Patents
Laser imaging apparatus use development coating and laser imaging apparatus developer roll Download PDFInfo
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- CN103555175B CN103555175B CN201310530428.2A CN201310530428A CN103555175B CN 103555175 B CN103555175 B CN 103555175B CN 201310530428 A CN201310530428 A CN 201310530428A CN 103555175 B CN103555175 B CN 103555175B
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- -1 polydimethylsiloxane Polymers 0.000 claims description 11
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- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 125000003368 amide group Chemical group 0.000 claims description 7
- 238000010306 acid treatment Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 claims description 4
- 125000000879 imine group Chemical group 0.000 claims description 4
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Abstract
The present invention provides a kind of laser imaging apparatus use development coating, comprises coating major ingredient and solidifying agent, and described solidifying agent accounts for the 1-5wt% of coating major ingredient total amount; Described coating major ingredient comprises water-based carbon nanotube conducting dielectric paste, film-forming resin and film coalescence aid, and wherein water-based carbon nanotube conducting dielectric paste accounts for the 5-30wt% of coating major ingredient; Film-forming resin accounts for the 50-70wt% of coating major ingredient total amount; Film coalescence aid accounts for the 3-5wt% of coating major ingredient; Add film coalescence aid after being mixed according to said ratio with film-forming resin by water-based carbon nanotube conducting dielectric paste, after adjustment PH value, it is prepared into coating major ingredient by shear agitation, then mixes with solidifying agent by proportioning. Present invention also offers a kind of laser imaging apparatus developer roll, its outer surface has above-mentioned coating, can obtain good laser printer and duplicator carbon dust carried charge, good physicals, it is possible to meet the durable requirement of laser imaging apparatus.
Description
[technical field]
The present invention relates to imaging equipment printer or copier technology field, particularly relate to one and can spray to printer or duplicating machine developing roller surface aqueous developer coating.
[background technology]
In the developing process of the imaging equipment such as printer, duplicating machine, suitable ink powder carried charge and upper powder amount are the essential condition obtaining high quality graphic. The surface property of developer roll, such as volume resistance, wear resistance and surfaceness etc., carried charge and upper powder amount on ink powder have important impact, and the volume specific resistance of strict control developer roll is 102-107�� cm. The volume specific resistance of developer roll is within above-mentioned scope, it is possible to makes developing roller surface control electric charge appropriately and sews. Proposing technical scheme in document CN200810003309.0 disclosed in Patent Office of the People's Republic of China is that the coating adding semiconductor property on the surface of developer roll is to improve the surface property of developer roll, make to print that carbon dust is charged evenly avoids development uneven phenomenon, thus obtain suitable ink powder carried charge and upper powder amount.
Whether electrically conducting coating conducts electricity by filmogen can be divided into blending type and conductor type two kinds. Filmogen itself can conduct electricity, it is not necessary to the coating adding other electro-conductive material again is this build electrically conducting coating, and this kind of coating synthesis difficulty, cost is higher. The coating making it to have electroconductibility by adding conductive filler material in nonconducting emulsion is called blending type electrically conducting coating, and it is simple that this kind of electrically conducting coating has synthesis, and the feature that cost is low, applies comparatively extensive. Water-borne coatings is as a kind of brand-new green environmental friendly coatings, and because it is not containing volatile organic components, environmentally safe, is widely used in industries such as automobile, building, electronics. Conductive filler material one class conventional at present is inorganic materials, and another class is conducting high polymers thing.
Document CN101108947A disclosed in Patent Office of the People's Republic of China, CN101508855A, CN1221768A, in ZL200510050812.8 and CN101935489A, inorganic materials is based on graphitized carbon black, graphite, metal-powder etc., there is compatibility problem in these inorganic conductive fillers and polymer emulsion, reduces the mechanical property of paint film.
And in patent documentation CN102070960A, CN102002314A, CN101418122A, conductive polymers is added into coating, consistency is good, but cost is relatively high. The conductive coating of inorganic conductive filler is due to mineral filler and polymer emulsion poor compatibility, and difficult formation homogeneous system, the conductivity of film is not good. Laser printer carries out printing the phenomenon that there will be and print carbon dust carried charge and raise continuously; Add the much smaller static inhibitor of molecular weight ratio superpolymer to obtain good printing carbon and divide carried charge. But adding antistatic coating prepared by low molecular weight substance may make the physical and mechanical properties of high polymer material worsen so that coating itself is soon aging, cannot ensure the needs of durable printing.
Since the Iijima of Japanese NEC company in 1991 finds carbon nanotube (CarbonNanotube is called for short CNT) at first, and cause the attention of scientific circles and industrial community very soon. Carbon nanotube has excellent machinery and photoelectric properties, and there is the performances such as antistatic and electromagnetic shielding, the length-to-diameter ratio that the high-ratio surface sum of carbon nanotube is high, excellent mechanics electric property is considered as the desirable weighting material of polymer materials, and carbon nano-tube/polymer composite material has become the focus of World Science research. But the molecular weight that carbon nanotube is huge (bad dispersibility, easily reunion), seriously hinder the application of carbon nano-tube/polymer composite material.
[summary of the invention]
Technical problem to be solved by this invention is the defect overcoming above-mentioned prior art, a kind of imaging equipment use development coating using carbon nanotube as conducting medium is provided, obtained coating can obtain good laser printer and duplicator carbon dust carried charge, good physicals, it is possible to meet the durable requirement of laser imaging apparatus.
For achieving the above object, the present invention provide firstly a kind of laser imaging apparatus use development coating, and it comprises coating major ingredient and solidifying agent, and described solidifying agent accounts for the 1-5wt% of described coating major ingredient total amount; Described coating major ingredient comprises water-based carbon nanotube conducting dielectric paste, film-forming resin and film coalescence aid, and wherein said water-based carbon nanotube conducting dielectric paste accounts for the 5-30wt% of described coating major ingredient; Described film-forming resin accounts for the 50-70wt% of described coating major ingredient total amount; Described film coalescence aid accounts for the 3-5wt% of described coating major ingredient; Add described film coalescence aid after being mixed according to said ratio with described film-forming resin by described water-based carbon nanotube conducting dielectric paste, after adjusted to ph, it is prepared into coating major ingredient by shear agitation, then mixes with described solidifying agent by proportioning; Described water-based carbon nanotube conducting dielectric paste take water-soluble carbon nanometer tube as conducting medium, then mixing dispersion agent, wetting agent, defoamer, Diethylene Glycol and deionized water to mix, wherein said water-soluble carbon nanometer tube is that amide group, the carbon nanotube of imine group or the hydrophilic carbon nanotube after silane coupler modified are contained in the surface after acid treatment; Described conducting medium accounts for the 0.5-5wt% of described water-based carbon nanotube conducting dielectric paste total amount, described dispersion agent accounts for the 6-10wt% of described water-based carbon nanotube conducting medium total amount, described wetting agent accounts for the 3-5wt% of described water-based carbon nanotube conducting medium total amount, described defoamer accounts for the 0.1-1.0wt% of described water-based carbon nanotube conducting medium total amount, described Diethylene Glycol accounts for the 5-10wt% of described water-based carbon nanotube conducting medium total amount, deionized water surplus.
Compared with prior art, in laser imaging apparatus use provided by the invention development coating, using carbon nanotube as conducting medium, it has following technique effect: (1) contains the hydrophilic radical such as amide group or imine group owing to carrying out acidification rear surface as the multi-walled carbon nano-tubes of conducting medium, it is possible to the water-based carbon nanotube conducting slurry that preparation consistency is good; (2) water-based carbon nano tube paste and the water-base resin system prepared have preferably consistency, carbon nanotube conducting medium can be able to even dispersion in coating system, overcome existing carbon nanotube dispersed shortcoming poor, that easily reunite, coating evenly disperses after spraying coating process film forming and is interconnected to form conductive network, for the raising of coatings conductive property provides sound assurance; (3) carbon nanotube has excellent conductivity as conducting medium, can obtain good printing carbon dust carried charge and upper powder amount; (4) preparation method's technique of aqueous developer coating is simple, the cost of material adopted is cheap, tooling cost is low, the developer roll coating of preparation has excellent anti-static function and ageing-resistant performance, when printing, there is good development effect and weather resistance, scale continuous prodution can be realized, there is good marketable value.
Present invention also offers a kind of laser imaging apparatus developer roll, by spraying above-mentioned aqueous developer coating on developer roll, can form thickness at developer roll outside surface is the coating of 2-10 ��m, and described Surface Resistivity of Coatings is 105-108��/m2��
It is coated with the developer roll of above-mentioned aqueous developer paint coatings, obtain good printing carbon dust carried charge on the one hand, improve the physicals of developer roll coating itself on the other hand, such as sticking power, weather resistance, wear resistance etc., thus well solve the defects such as antistatic coating Product Process is complicated, endurance quality is poor, cost is expensive, for applying of antistatic coating provides strong guarantee.
[accompanying drawing explanation]
Fig. 1 is that conductive carbon nanotube slurry and waterborne film-forming material blending ratio are to the interact relation figure of coatings conductive property;
Fig. 2 is preparation of the present invention and spraying coating process schema;
Fig. 3 is developing roller for laser printer schematic diagram.
[embodiment]
For realizing the object of the invention, below in conjunction with embodiment, the present invention is described in further detail. It is to be understood that specific embodiment described herein, only for explaining the present invention, it is not intended to limit the present invention.
See Fig. 2, the present invention provide firstly a kind of laser imaging apparatus use development coating, and for being coated on the developer roll outside surface of laser imaging apparatus, it comprises coating major ingredient and solidifying agent, and described solidifying agent accounts for the 1-5wt% of described coating major ingredient total amount; Described coating major ingredient comprises water-based carbon nanotube conducting dielectric paste, film-forming resin and film coalescence aid, and wherein said water-based carbon nanotube conducting dielectric paste accounts for the 5-30wt% of described coating major ingredient; Described film-forming resin accounts for the 50-70wt% of described coating major ingredient total amount; Described film coalescence aid accounts for the 3-5wt% of described coating major ingredient. In said ratio, the ratio of water-based carbon nanotube conducting slurry and film-forming resin consumption is when 5-30wt%, and coating has good electroconductibility, specifically can see Fig. 1. When water-based carbon nano tube paste consumption and film-forming resin are lower than 5wt%, the electroconductibility of coating own is not good, can not meet the requirement of the printing carbon dust carried charge of developer roll coating used. When the consumption of water-soluble carbon nanometer tube slurry and film-forming resin are higher than 20wt%, coating electroconductibility is good, but slurry addition is relatively big on the impact of coating electric conductivity, is also unfavorable for as development coating slurry. During preparation, add described film coalescence aid after described water-based carbon nanotube conducting dielectric paste can be mixed according to said ratio with described film-forming resin, after adjusted to ph, be prepared into coating major ingredient by shear agitation, then mix with described solidifying agent by proportioning.
Specifically, described water-based carbon nanotube conducting dielectric paste take water-soluble carbon nanometer tube as conducting medium, then dispersion agent is mixed, wetting agent, defoamer, Diethylene Glycol and deionized water mix, wherein said conducting medium accounts for the 0.5-5wt% of described water-based carbon nanotube conducting dielectric paste total amount, described dispersion agent accounts for the 6-10wt% of described water-based carbon nanotube conducting medium total amount, described wetting agent accounts for the 3-5wt% of described water-based carbon nanotube conducting medium total amount, described defoamer accounts for the 0.1-1.0wt% of described water-based carbon nanotube conducting medium total amount, described Diethylene Glycol accounts for the 5-10wt% of described water-based carbon nanotube conducting medium total amount, deionized water surplus. experiment proves, when carbon nanotube conducting medium accounts for water paste sum-rate lower than 0.5wt%, can not fully improve the conductivity of coating. when carbon nanotube conducting medium accounts for water paste sum-rate higher than 5wt%, the viscosity of slurry own is relatively big, and not easily deaeration, affects the dispersion of waterborne conductive slurry in resin.
Specifically, described conducting medium carbon nanotube is that amide group, the carbon nanotube of imine group or the hydrophilic carbon nanotube after silane coupler modified are contained in the surface after acid treatment. Being dispersed in water-base resin owing to carbon nanotube is more difficult, so needing it is carried out surface modification to improve its wetting ability, being convenient to be dispersed in system.
Specifically, described carbon nanotube is multi-walled carbon nano-tubes or Single Walled Carbon Nanotube, wherein said multi-walled carbon nano-tubes diameter 10-20nm, length 1-5 ��m, specific surface area 40-300m2/ g; Described diameter of single-wall carbon nano tube is less than 10nm, length 1-5 ��m, specific surface area 350-450m2/ g. The carbon nanotube with above-mentioned parameter, its conductivity is better, therefore preferred this type of conductive carbon nanotube.
Specifically, described dispersion agent can be conventional water-borne coatings dispersion agent, just not produce to pollute can, can select at least one in Xylo-Mucine, Triton X-100 or sodium laurylsulfonate; Described wetting agent is the polyether-modified compound of polydimethylsiloxane; Described defoamer is polysiloxane polyether copolymer.
Specifically, described film-forming resin adopts water soluble resin, one or more in optional use polyaminoester emulsion, water-and acrylate emulsion, water-base fluorocarbon emulsion, aqueous alkide resin, aqueous polyester resin, aqueous epoxy resins, water-compatible amino resin and above-mentioned modified resin.
Specifically, described film coalescence aid adopts one or both in alcohol class, ester class, alkane ketone class, alkoxide, alcohol ether class.
In preparation process, described film coalescence aid is added after being mixed according to said ratio with described film-forming resin by described water-based carbon nanotube conducting dielectric paste, pH value regulator adjusted to ph is adopted to be 8-10, described pH value regulator is one or more in trolamine, monoethanolamine, N, N-dimethylethanolamine.
Specifically, described solidifying agent adopts the one in aziridine crosslinker, epoxy silane compounds, carbodiimide compound, trimeric cyanamide and modified compound, silane coupling agent. Join solidifying agent aqueous developer coating major ingredient to stir spray to after evenly and can apply after film-forming under developing roller surface certain condition.
See Fig. 2 and Fig. 3, present invention also offers a kind of laser imaging apparatus developer roll, the conductive rubber elastomerics 2 comprising roller core 1, being sheathed on this roller core 1, by spraying above-mentioned aqueous developer coating on developer roll, can forming, at developer roll outside surface, the coating 3 that thickness is 2-10 ��m, described coating 3 surface resistivity is 105-108��/m2��
Aqueous developer coating of the present invention is by adopting carbon nanotube as conducting medium, the static resistance performance and ageing resistance that are coated on laser imaging apparatus developer roll external surface coating can be improved, and apply the coating to the antistatic effect that still can keep initial on rubber roll after the long period, solve in antistatic coating product the defects such as the complex process that exists, poor durability, cost are expensive.
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment 1
The multi-walled carbon nano-tubes containing hydrophilic radical using surface prepares laser printer aqueous developer coating as conducting medium:
Take 5 parts of multi-walled carbon nano-tubes, 1.5 parts of wetting agents, 2.5 parts of dispersion agents, 2.5 parts of Diethylene Glycols, the deionized water of 88 parts be added in sand mill sand milling 1-2 hour, and then proceed in high speed dispersor and add the defoamer of 0.5 part, under 800-1200rpm, disperse 20-30min, filter the obtained electrocondution slurry containing multi-walled carbon nano-tubes with 100 mesh filter screens.
Being joined in 75 parts of aqueous polyurethane emulsions by 20 parts of above-mentioned carbon nanotube conducting slurries and go, paddle agitator adds film coalescence aid diethylene glycol monomethyl ether 4.5 parts, trolamine 0.5 part under stirring with the speed of 200-400rpm successively, stirs 20-30min. Filtering through 200 mesh filter screens and obtain laser printer aqueous developer coating major ingredient, using aziridine as aqueous developer coating crosslinking agent, thus to be prepared into take carbon nanotube as the two-pack laser printer aqueous developer coating major ingredient of conducting medium.
By above-mentioned aqueous developer coating major ingredient and aziridine crosslinker according to after the ratio Homogeneous phase mixing of 100:2-100:5; the coating method of spraying is adopted to be sprayed on development rubber roll surface; form one layer 5 ��m even protective membranes (coating); experiment proves, it may be achieved the requirement of good printing carbon dust carried charge and printing weather resistance.
Embodiment 2
The multi-walled carbon nano-tubes containing amide group using acid treatment rear surface prepares laser printer aqueous developer coating as conducting medium:
Take the 1.5 part multi-walled carbon nano-tubes of surface containing hydrophilic radical, add 0.5 part of wetting agent and 1 part of dispersion agent, with 4.5 parts of Diethylene Glycols, the deionized water of 92 parts is added in sand mill sand milling 1-2 hour, and then proceed to the defoamer adding 0.5 part in high speed dispersor, 30-60min is disperseed to filter with 100 mesh filter screens under 800-1000rpm, obtained with the multi-walled carbon nano-tubes electrocondution slurry containing amide group.
Being joined in 70 parts of water-based fluoro-silicone emulsions by 25 parts of above-mentioned carbon nanotube conducting slurries and go, the speed of paddle agitator 200-400rpm adds film coalescence aid diethylene glycol monomethyl ether 4.8 parts, diethanolamine 0.2 part under stirring successively, stirs 30-60min. Filter through 400 mesh filter screens and obtain laser printer aqueous developer coating major ingredient, using methyl-etherified terpolycyantoamino-formaldehyde resin as aqueous developer coating crosslinking agent, thus to be prepared into take carbon nanotube as the two-pack laser printer aqueous developer coating major ingredient of conducting medium.
By aqueous developer coating major ingredient and methyl-etherified terpolycyantoamino-formaldehyde resin according to after the ratio Homogeneous phase mixing of 100:3-100:5; the coating method of spraying is adopted to be sprayed on development rubber roll surface; form one layer 10 ��m even protective membranes (coating); experiment proves, it may be achieved good printing carbon dust carried charge and the requirement to printing weather resistance.
Embodiment 3
The multi-walled carbon nano-tubes containing amide group using acid treatment rear surface prepares laser printer aqueous developer coating as conducting medium.
Take the multi-walled carbon nano-tubes 3 part of surface containing hydrophilic radical, add 0.5 part of wetting agent (the polyether-modified compound of polydimethylsiloxane) and 1 part of dispersion agent (Xylo-Mucine, at least one in Triton X-100 or sodium laurylsulfonate), with 1.5 parts of Diethylene Glycols, the deionized water of 93 parts is added in sand mill sand milling 1-2 hour, and then proceed to the defoamer adding 0.5 part in high speed dispersor, 30-60min 100 mesh filter screens are disperseed to filter under 800-1000rpm obtained taking containing the multi-walled carbon nano-tubes electrocondution slurry of imines as hydrophilic group.
With 30 parts of above-mentioned carbon nanotube conducting slurries to, in 65 parts of water-and acrylate emulsions, adding film coalescence aid pyrrolidone 4.8 parts, N, N-dimethylethanolamine 0.2 part under 200-400rpm paddle agitator stirring action successively, stir 30-60min. Filter through 400 mesh filter screens and obtain laser printer aqueous developer coating major ingredient. Using resin as aqueous developer coating crosslinking agent. Thus to be prepared into take carbon nanotube as the two-pack laser printer aqueous developer coating of conducting medium.
By surperficial according to adopting the coating method of spraying to be sprayed on development rubber roll after the ratio Homogeneous phase mixing of 100:3-100:5 to aqueous developer coating major ingredient and KH-550 silane coupling agent; form one layer of 2 ��m of even protective membrane; experiment proves, it may be achieved good printing carbon dust carried charge and the requirement to printing weather resistance.
The above embodiment only have expressed the preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to patent scope of the present invention. , it is also possible to make some distortion and improvement, it should be appreciated that for the person of ordinary skill of the art, without departing from the inventive concept of the premise these all belong to protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. laser imaging apparatus use development coating, it is characterised in that, comprise coating major ingredient and solidifying agent, described solidifying agent accounts for the 1-5wt% of described coating major ingredient total amount; Described coating major ingredient comprises water-based carbon nanotube conducting dielectric paste, film-forming resin and film coalescence aid, and wherein said water-based carbon nanotube conducting dielectric paste accounts for the 5-30wt% of described coating major ingredient; Described film-forming resin accounts for the 50-70wt% of described coating major ingredient total amount; Described film coalescence aid accounts for the 3-5wt% of described coating major ingredient; Add described film coalescence aid after being mixed according to said ratio with described film-forming resin by described water-based carbon nanotube conducting dielectric paste, after adjusted to ph, it is prepared into coating major ingredient by shear agitation, then mixes with described solidifying agent by proportioning; Described water-based carbon nanotube conducting dielectric paste take water-soluble carbon nanometer tube as conducting medium, then mixing dispersion agent, wetting agent, defoamer, Diethylene Glycol and deionized water to mix, wherein said water-soluble carbon nanometer tube is that amide group, the carbon nanotube of imine group or the hydrophilic carbon nanotube after silane coupler modified are contained in the surface after acid treatment; Described conducting medium accounts for the 0.5-5wt% of described water-based carbon nanotube conducting dielectric paste total amount, described dispersion agent accounts for the 6-10wt% of described water-based carbon nanotube conducting medium total amount, described wetting agent accounts for the 3-5wt% of described water-based carbon nanotube conducting medium total amount, described defoamer accounts for the 0.1-1.0wt% of described water-based carbon nanotube conducting medium total amount, described Diethylene Glycol accounts for the 5-10wt% of described water-based carbon nanotube conducting medium total amount, deionized water surplus.
2. laser imaging apparatus use development coating as claimed in claim 1, it is characterized in that: described carbon nanotube is multi-walled carbon nano-tubes or Single Walled Carbon Nanotube, wherein said multi-walled carbon nano-tubes diameter 10-20nm, length 1-5 ��m, specific surface area 40-300m2/ g; Described diameter of single-wall carbon nano tube is less than 10nm, length 1-5 ��m, specific surface area 350-450m2/g��
3. laser imaging apparatus use development coating as claimed in claim 1, it is characterised in that: described dispersion agent is at least one in Xylo-Mucine, Triton X-100 or sodium laurylsulfonate; Described wetting agent is the polyether-modified compound of polydimethylsiloxane; Described defoamer is polysiloxane polyether copolymer.
4. laser imaging apparatus use development coating as claimed in claim 1, it is characterised in that: described film-forming resin adopts one or more in aqueous polyurethane emulsion, water-and acrylate emulsion, water-base fluorocarbon emulsion, aqueous alkide resin, aqueous polyester resin, aqueous epoxy resins or water-compatible amino resin.
5. laser imaging apparatus use development coating as claimed in claim 1, it is characterised in that: described film coalescence aid adopts one or both in alcohol class, ester class, alkane ketone class, alkoxide, alcohol ether class.
6. laser imaging apparatus use development coating as claimed in claim 1, it is characterized in that: after being mixed by proportioning with described film-forming resin by described water-based carbon nanotube conducting dielectric paste, add described film coalescence aid, pH value regulator adjusted to ph is adopted to be 8-10, described pH value regulator is one or more in trolamine, monoethanolamine, N, N-dimethylethanolamine.
7. laser imaging apparatus use according to claim 1 development coating, it is characterised in that: described solidifying agent adopts any one in aziridine crosslinker, epoxy silane compounds, carbodiimide compound, trimeric cyanamide and modified compound, silane coupling agent.
8. laser imaging apparatus developer roll, it is characterised in that: having coating prepared by the development coating of the laser imaging apparatus use described in the arbitrary item of claim 1-7, described Surface Resistivity of Coatings is 105-108��/m2��
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| CN107949487B (en) * | 2015-09-28 | 2020-12-11 | 大日本印刷株式会社 | transfer foil |
| CN106519769B (en) * | 2016-10-27 | 2019-06-21 | 深圳市乐普泰科技股份有限公司 | Conductive coating and laser printer rubber roller preparation method |
| CN108490750B (en) * | 2018-05-11 | 2021-04-23 | 湖北大学 | A developing roller and preparation method thereof |
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