CN100535786C - Developer roll and method of producing the same - Google Patents
Developer roll and method of producing the same Download PDFInfo
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- CN100535786C CN100535786C CNB2007100714730A CN200710071473A CN100535786C CN 100535786 C CN100535786 C CN 100535786C CN B2007100714730 A CNB2007100714730 A CN B2007100714730A CN 200710071473 A CN200710071473 A CN 200710071473A CN 100535786 C CN100535786 C CN 100535786C
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Abstract
The invention relate to a developing roller and a preparation method thereof. The developing roller comprises a metallic axle. The metallic axle is adhered with a polyurethane elastomer. The surface of the polyurethane elastomer is coated with a developing surface layer the thickness of which is 10 to 40Mum. The polyurethane elastomer is made of prepolymer-R solution or prepolymer-P solution. The prepolymer-R solution comprises conductive substances the weight percentage of which is 2 to 8 percent. The prepolymer-P solution comprises TDI the weight percentage of which is 50 to 70 percent. The developing roller is made of prepolymer materials. Therefore, the invention has the advantages of proper elasticity, good wear resistance, good heat resistance, good chemical stability, and low compression deformation rate and is not likely to pollute the OPC drum.
Description
Technical field
The present invention relates to a kind of developer roll and preparation method thereof, this developer roll is applied in the non magnetic developing apparatus, as printer, and duplicating machine, facsimile recorder etc.
Background technology
Duplicating machine, printer, facsimile recorder is by charging roller photosensitive drum charging, exposure to be formed electrostatic latent image, transmits the electrostatic latent image part of carbon dust on the photosensitive drums by developer roll then, and this carbon dust video is sent to and adds thermal finalization on the paper and form final printing character image.
Duplicating machine, printer, charging roller and developer roll are arranged in the facsimile recorder toner cartridge, charging roller of the prior art, developer roll have the conducting rubber of use to do conductive elastomer, in rubber elastomer, be fixed with metal shaft then, it must homogenization also be difficult that the synthetic rubber elastomer production method keeps the distribution of each composition, comes off easily between rubber elastomer and the metal shaft; And rubber elastomer developer roll resistance height; The vulcanizing agent composition oozes out and can cause photoreceptor to pollute.
The developer roll that adopts polyurethane to make in addition in the prior art relates to charging roller, the developer roll that the conductive polyurethane composition is made as Chinese patent application (03152266.1); The conductive polyurethane that this developer roll is made up of polyether polyol and polyisocyanate is made cylindrical body and is formed with the metal shaft that is installed on the cylindrical body.This developer roll can make on the photoreceptor of toner attached to toner cartridge, resistance is low, but the electric conductivity of this developer roll is too big, when resistance reduces, electric current too much causes toner cartridge or mechanical hook-up infringement, on the toner cartridge surface during defectiveness, consent, scratch, dust, electric current too much during by this part runs off, secret note appears in charged inhomogeneous causing on the toner cartridge on the portrait, and the not enough portrait of supply what is said or talked about powder dies down on the developer roll; And the cylindrical body surfaceness is bigger.
In order to solve above too much current problems, U.S. Patent application (US5126913) relates at charging roller, developer roll and forms resistive formation on the surface, the restriction current's intensity.
When improving the surface resistance on conductive rollers, the developer roll, strength of current reduces, and defectiveness the electric current problems of too can not occur yet on the toner cartridge surface, though can solve the secret note problem, reverse phenomenon appears in charge efficiency reduction on the contrary.
Generally, the developing roller surface layer resistivity is for suitable development requirement is provided, and general resistivity is 10
5-10
10In the scope of Ω CM, in order to keep charge efficiency and the equilibrium of superficial layer resistivity, usually be to have mixed into a small amount of conductive particle state in formed elastic body, the part (conductive particle) that part that resistance is high (resin) and resistance are low exists simultaneously, and the distribution of conductive particle is unbalanced in elastic body.Thereby cause the interior electroconductive powder of elastomer resin position resistance value intensive or that disperse too high or too low, occur too high in resistance and low excessively phenomenon on the part.
Summary of the invention
The present invention is directed to the existing in prior technology problem a kind of developer roll is provided, it is raw material that this developer roll elastic body is selected two component polyurethane for use, compares with elastomeric material, and its chemical stability is good, be not easy to pollute photosensitive drums, and thermal stability is very good; Elastomeric resistivity is by adding special conductive material-CNT, and this material is a liquid nano level conductive material, so the resistance homogeneity of product is very good, and surfaceness and compression deformation rate are low.
Above-mentioned technical matters of the present invention is implemented by the following technical programs: a kind of developer roll, comprise a metal shaft, be bonded with polyurethane elastomer on the described metal shaft, it is 10～40 μ m development superficial layers that described polyurethane elastomer surface is coated with thickness, described polyurethane elastomer is made by prepolymer-R liquid and prepolymer-P liquid, and described prepolymer-R liquid comprises that its percentage by weight is 2～8% conductive materials; Described prepolymer-P liquid comprises that its percentage by weight is 50～70% different hydrogen acid ether (hydrogen acid ester).
Developer roll of the present invention adopts two kinds of liquid prepolymers to make polyurethane elastomer, wherein prepolymer-R liquid comprises that its percentage by weight is 2～8% conductive materials, it is thereby that 50～70% different hydrogen acid ether (hydrogen acid ester) has solved developer roll in low temperature that prepolymer-P liquid comprises its percentage by weight, and electric conductivity is not enough and ooze out pollution problem; It is 10～40 μ m development superficial layers that this external polyurethane elastomer surface is coated with thickness, thereby makes the developer roll surfaceness reduce the component distributing homogeneous.
In above-mentioned developer roll, described development superficial layer is made by the composition of following weight parts:
Conductive carbon black: 3～8 parts; Spreading agent: 20～40 parts; Hybrid resin: 200～350 parts;
Silicon dioxide: 3～7 parts; PEF: 0.1～0.5 part; Defoamer: 1～5 part;
Organic solvent: 300～600 parts.
As preferably, described spreading agent is made up of following component in percentage by weight: acrylic acid multipolymer: 30%～50%; 1-Methoxy-2-propyl acetate: 20%～40%; Butyl glycol ether: 20%～40%.Described hybrid resin is made up of following component in percentage by weight: acrylic acid resin: 60%～80%; Isobutyl alcohol: 5%～10%; Methylisobutylketone: 5%～10%; All the other are aromatic hydrocarbon.Described defoamer is made up of following component in percentage by weight: silicon resin copolymer: 10%～30%; Hydroxyl ethyl acetate: 5%～10%; Butyl glycol ether: 0.5%～2%; All the other are solvent; Described organic solvent is an organic solvent of ketone.The conductive carbon black that adopts among the present invention is conductive carbon black 600J, and its pH value is 7.0-10.0; Proportion is 1.25-1.45g/cm
3Described spreading agent is spreading agent-D2000, and the acrylic acid multipolymer of forming spreading agent is the modified acroleic acid segmented copolymer; The proportion of spreading agent is 1.02g/cm
3(20 ℃).Wherein hybrid resin is hybrid resin-DNA700, and the aromatic hydrocarbon of forming hybrid resin has dimethylbenzene, toluene and heavy aromatics etc., and the viscosity of described hybrid resin is 65～75cps, and proportion is for being 0.98～1.3g/cm
3Described defoamer is defoamer-BYK052, and the solvent of forming defoamer has gasoline, diesel oil etc.; Wherein the proportion of defoamer is 0.82g/cm under 20 ℃ condition
3Viscosity is 90～120cps; Described organic solvent of ketone has butanone, acetone etc.
In addition, in above-mentioned developer roll, described development superficial layer can also be made by the composition of following weight parts:
Nylon: 20～50 parts; Silicon dioxide: 2.0～5.0 parts; PEF: 0.1～0.5 part
Organic solvent: 600～1000 parts.
As preferably, described nylon is pure molten nylon; The molten nylon of described alcohol is a kind of extraordinary nylon that forms through the multi-component copolymer condensation, and the maximum feature of pure molten nylon is to dissolve in methyl alcohol, ethanol, propyl alcohol and other lower aliphatic alcohols.This specific character that the molten nylon of alcohol possesses makes it can be fit to coating, impregnating technology, give final articles for use wearing quality, anti-scratch, oil resistance, chemical proofing, alkali resistance, ozone resistance, improve toughness, obdurability, elastic recovery, soft pliability and thermotolerance etc.The pure molten nylon that the present invention adopts mainly contains nylon 8 061, nylon 8 062, nylon 8 063 etc.; Described organic solvent is an alcohol organic solvent.Described alcohol organic solvent mainly is a lower aliphatic alcohols, as ethanol, methyl alcohol etc.The distribution homogeneous of the developer roll superficial layer composition of making by mentioned component and content thereof forms balanced resistance value; Roughness is low; Has good development effect.
In above-mentioned developer roll, described prepolymer-R liquid mainly is grouped into by the one-tenth of following weight portion: polyether glycol: 50～80 parts, and polyethylene glycol: 10～20 parts; Electroconductive stuffing: 3～10 parts; Catalyzer: 0.1～0.5 part; Crosslinking chemical: 2～7 parts.Described prepolymer-P liquid mainly is grouped into by the one-tenth of following weight portion: isocyanate: 92～98 parts; Polyether glycol: 2～8 parts.As preferably, described electroconductive stuffing is a CNT liquid, and described CNT liquid is made by nano level phosphoric acid hydrocarbon salt and sodium chloride.Wherein the existing known method of the DMC catalysts of the catalyzer of prepolymer-R use is made, and the crosslinking chemical that the present invention adopts is known crosslinking chemical of prior art such as crosslinking chemical PG etc.; The present invention adopts isocyanate that diphenylmethane diisocyanate (MDI), triclene diisocyanate (TDI), hexamethylene diethyl cyanate (HDI) etc. are arranged.It is CNT liquid that the present invention adopts electroconductive stuffing, and this material is a liquid nano level conductive material, so the developer roll resistance homogeneity of making is very good, and surfaceness and compression deformation rate are low.Because polyurethane is the high polymer chemistry thing by multiple propylhomoserin second fat be combined into, chemicals generation-OH base (the alcohol that has isocyanate and reactive hydrogen, amine, water) additional neutralization reaction such as, along with the composition that uses raw material or the composition of intramolecular composition, along with ratio and ordered state etc. because the modification epistasis, thermotolerance, the variation of resistance to chemical reagents etc.; The polyurethane elastomer of developer roll of the present invention adopts prepolymer-R liquid and prepolymer-P liquid to make, these compositions must have water-based, can cast, wherein polyurethane is the high polymer chemistry thing by multiple propylhomoserin second fat be combined into, the chemicals that have isocyanate and reactive hydrogen generate hydroxyl and carry out neutralization reaction, along with the composition that uses raw material and the composition of content or its intramolecular structure thereof, the elasticity of polyurethane elastomer, thermotolerance, resistance to chemical reagents are all different, and the present invention is according to the character of making the polyurethane composition and the intrinsic characteristic of raw material; Develop prepolymer-R liquid and prepolymer-P liquid; The polyurethane elastomer of making by above-mentioned two kinds of liquid has suitable electrical specification, has suitable elasticity, heat resistance is good, environmental stability good, suitable wearing quality, leaching or obstruction etc. are no abnormal in the use, the Workable of moulding.
The present invention also provides the preparation method of above-mentioned developer roll in addition, and this method may further comprise the steps:
A, metal shaft surface treatment: metal shaft cleaning, dry back are evenly scribbled cementing agent on its surface, then by stand-by after the preheating in the mould of packing into after the heat treated;
B, make polyurethane elastomer: after the composition that will form prepolymer-R liquid mixes, stir by homo-mixer and electroconductive stuffing to be uniformly dispersed afterwards and prepolymer-P liquid stirs respectively under vacuum condition; Stirring the back is 1: 0.8～1.0 to mix according to prepolymer-R liquid and prepolymer-P liquid weight ratio, and it is poured in the above-mentioned mould that metal shaft is housed is cured, be fixed with the polyurethane elastomer of metal shaft in obtaining after curing and demolding, grinding, the cutting;
C, sprayed surface layer: the polyurethane elastomer surface that is fixed with metal shaft in above-mentioned evenly sprays the development superficial layer, obtains developer roll after being heating and curing then 20～60 minutes.
In the preparation method of above-mentioned developer roll, the thickness that the metal shaft surface described in the steps A evenly scribbles cementing agent is 0.2～0.4 μ m, and the one-tenth that described cementing agent mainly contains following weight portion is grouped into:
Alcohols material: 30～60 parts; Arene material: 20～50 parts; Phenol: 3～8 parts
Aldehyde material: 0.01～1.0 part.
Wherein the cementing agent that uses of the present invention is cementing agent KAD1146, and the alcohols material of forming cementing agent mainly contains alcohols potpourris such as methyl alcohol, ethanol, isopropyl alcohol; The arene material mainly contains toluene, ethylbenzene etc., and aldehyde material mainly contains aldehyde materials such as formaldehyde, acetaldehyde; The viscosity of described cementing agent is 140～170cps, and solidfied material content is 12%～15%; Proportion is 0.80～0.90g/cm
3
In the preparation method of above-mentioned developer roll, the preheat temperature described in the steps A is 40～90 ℃, and be 8～30 minutes preheating time.
In the preparation method of above-mentioned developer roll, the vacuum tightness among the step B during vacuum stirring is 0.1～0.2Mpa, and the time of vacuum stirring is 30～90 minutes.It mainly is in order to remove moisture and bubble that the present invention adopts vacuum stirring.
In the preparation method of above-mentioned developer roll, the prepolymer described in the step B-R liquid and prepolymer-P liquid is to be poured into from bottom to top in the above-mentioned mould that metal shaft is housed by sealed tube.Adopting this method to pour into a mould mainly is in order to prevent the generation of bubble.
In the preparation method of above-mentioned developer roll, the solidification process described in the step B is the regelate process, and each time of solidifying is 10 minutes～30 minutes, and solidification temperature is 80～180 ℃.
In the preparation method of above-mentioned developer roll, the process of the spraying development superficial layer described in the step C is: the composition that will make the development superficial layer mixes by its parts by weight, the mixing back stirs with stirring machine and forms surperficial spray coating liquor, be sprayed on the polyurethane elastomer surface then, after solidifying 20～60 minutes under the condition of 50～180 ℃ of temperature, be formed on the polyurethane elastomer surface then and form the development superficial layer.
In the preparation method of above-mentioned developer roll, the thickness of the development superficial layer described in the step C is 10～40 μ m, and surfaceness is less than 3 μ m.
Metal shaft of the present invention adopts stainless steel or hard chromium-plated steel to make, for the adhesion between reinforced metal axle and the polyurethane elastomer, essential coated with adhesive on metal shaft, adopt the direct contact type coating method, the thickness that applies is 0.2-0.4 μ m, will be through being heat treated under 70～120 ℃ the condition in temperature after the coating, in the process of making polyurethane elastomer of the present invention, prepolymer-R liquid and prepolymer-P liquid becomes along with temperature in the reaction velocity that pours into polyurethane elastomer, the present invention adopts twice curing, temperature during curing is controlled at 80～180 ℃, each time of solidifying was controlled at 10 minutes～30 minutes, then polyurethane elastomer can be along with shrinkage and the expansion of temperature and set time, its size changes, prepolymer among the present invention-R liquid and prepolymer-P liquid be controlled at 1: 0.8～1.0 by weight; According to this weight ratio compounding substances homogeneous, pour into behind the polyurethane elastomer by grinding, cleaning; The polyurethane elastomer surface resistance of making by said method is 10
5～10
10Ω cm, surfaceness is less than 5 microns, and shore hardness is 40～80 degree.
In the preparation method of above-mentioned developer roll, the method of sprayed surface layer has two kinds of methods among the step C: one: hybrid resin and spreading agent material are joined in the organic solvent of ketone after mixing according to its weight portion, add conductive carbon black, silicon dioxide, PEF and the defoamer of pressing its weight portion at mixing material then, evenly form surperficial spray coating liquor with the stirring machine high-speed stirred again; Be cured after then it being sprayed on the polyurethane elastomer surface, the solidification temperature of this surface liquid is 100～180 degree, 20～60 minutes set times; Two: nylon is dissolved in the alcohol organic solvent, in mixing material, adds silicon dioxide and PEF then, evenly form surperficial spray coating liquor with the stirring machine high-speed stirred; Be cured after then it being sprayed on the polyurethane elastomer surface, the solidification temperature of this surface liquid is 50～100 degree, 20～60 minutes set times.
In sum, developer roll of the present invention and preparation method thereof has the following advantages:
1, developer roll of the present invention is selected polyurethane material for use, and it has, and suitable elasticity, anti-wear performance are good, good heat resistance, chemical stability are good, are not easy to produce photosensitive drums and pollute, and compression deformation rate is low.
2, the elastic body resistance of developer roll of the present invention is regulated by liquid nano carbon tube material, so it is evenly distributed the product uniform resistivity; Better by the regulating effect of surface coating again, print bad phenomenon such as secret note can not occur.
3, preparation method's cost of manufacture of developer roll of the present invention is low, production efficiency height, the developer roll stay in grade of making; Can realize large-scale industrial production.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail; Be not limited to these embodiment but do not invent.
Table 1: the component (weight portion) of the prepolymer of the preparation polyurethane elastomer in the developer roll of the present invention-P liquid
Wherein the isocyanate described in the embodiment 1 is diphenylmethane diisocyanate (MDI); Isocyanate described in the embodiment 2 is triclene diisocyanate (TDI); Isocyanate described in the embodiment 3 is diphenylmethane diisocyanate (MDI); Isocyanate described in the embodiment 4 is triclene diisocyanate (TDI); Hexamethylene diethyl cyanate (HDI) described in the embodiment 5.
Table 2: the component (weight portion) of the prepolymer of the preparation polyurethane elastomer in the developer roll of the present invention-R liquid
Wherein embodiment 1～5 described electroconductive stuffing is a CNT liquid, and it is made by nano level phosphoric acid hydrocarbon salt and sodium chloride, and both weight ratios are 1: 1; The DMC catalysts that described catalyzer is made for existing known method; Described crosslinking chemical is the known crosslinking chemical PG of prior art.
Table 3: the component (weight portion) of the preparation superficial layer in the developer roll of the present invention
Wherein the spreading agent described in the embodiment 1 is by being the acrylic acid multipolymer by weight percentage: 30%; 1-Methoxy-2-propyl acetate: 40%; Butyl glycol ether: 30% makes; Described hybrid resin is by being the acrylic acid resin by weight percentage: 60%; Isobutyl alcohol: 5%; Methylisobutylketone: 10%; All the other are made for toluene; Described defoamer is by being silicon resin copolymer by weight percentage: 10%; Hydroxyl ethyl acetate: 10%; Butyl glycol ether: 2%; All the other are made for industrial naptha; Described organic solvent is a butanone;
Spreading agent described in the embodiment 2 is by being the acrylic acid multipolymer by weight percentage: 35%; 1-Methoxy-2-propyl acetate: 40%; Butyl glycol ether: 25% makes; Described hybrid resin is by by being the acrylic acid resin by weight percentage: 65%; Isobutyl alcohol: 8%; Methylisobutylketone: 7%; All the other are made for dimethylbenzene; Described defoamer is by being silicon resin copolymer by weight percentage: 15%; Hydroxyl ethyl acetate: 8%; Butyl glycol ether: 1.5%; All the other are made for industrial naptha; Described organic solvent is an acetone;
Spreading agent described in the embodiment 3 is by being the acrylic acid multipolymer by weight percentage: 40%; 1-Methoxy-2-propyl acetate: 25%; Butyl glycol ether: 35% makes; Described hybrid resin is by by being the acrylic acid resin by weight percentage: 70%; Isobutyl alcohol: 7%; Methylisobutylketone: 8%; All the other are made for heavy aromatics; Described defoamer is by being silicon resin copolymer by weight percentage: 20%; Hydroxyl ethyl acetate: 7%; Butyl glycol ether: 1%; All the other are made for industrial naptha; Described organic solvent is a butanone;
Spreading agent described in the embodiment 4 is by being the acrylic acid multipolymer by weight percentage: 45%; 1-Methoxy-2-propyl acetate: 30%; Butyl glycol ether: 25% makes; Described hybrid resin is by by being the acrylic acid resin by weight percentage: 75%; Isobutyl alcohol: 10%; Methylisobutylketone: 5%; All the other are mixed and made into for toluene and dimethylbenzene; Described defoamer is by being silicon resin copolymer by weight percentage: 25%; Hydroxyl ethyl acetate: 6%; Butyl glycol ether: 1%; All the other are made for industrial naptha; Described organic solvent is an acetone;
Spreading agent described in the embodiment 5 is by being the acrylic acid multipolymer by weight percentage: 50%; 1-Methoxy-2-propyl acetate: 20%; Butyl glycol ether: 30% makes; Described hybrid resin is by by being the acrylic acid resin by weight percentage: 80%; Isobutyl alcohol: 5%; Methylisobutylketone: 5%; All the other are being mixed and made into of toluene, dimethylbenzene and heavy aromatics; Described defoamer is by being silicon resin copolymer by weight percentage: 30%; Hydroxyl ethyl acetate: 5%; Butyl glycol ether: 0.5%; All the other are made for industrial naptha; Described organic solvent is a butanone.
Table 4: the another kind of component (weight portion) of the preparation superficial layer in the developer roll of the present invention
Wherein the nylon described in the embodiment 6～10 is pure molten nylon-8 063; Described organic solvent is a methyl alcohol.
Embodiment 1
Choose the hard chromium-plated steel as metal shaft, adopt cleaning machine that metal shaft was cleaned 1～2 minute; At room temperature dry then; Dry back at metal shaft surface-coated cementing agent, the isopropyl alcohol that described cementing agent by weight portion is: 30 parts; Toluene: 30 parts; Ethanol: 10 parts; Phenol: 5 parts; Methyl alcohol: 1 part; Formaldehyde: make for 0.05 part; The thickness that applies is 0.2～0.4 micron, through being heat treated under 70 ℃ the condition in temperature, the above-mentioned metal shaft of handling well is put into the mould preheating 30 minutes, 40 ℃ of preheat temperatures then;
After the composition of forming prepolymer-R liquid in the table 2 mixed by its weight portion, by homo-mixer stir electroconductive stuffing is uniformly dispersed after; Prepare according to the composition and the content thereof of prepolymer in the table 1-P liquid then; Preparation back prepolymer-R liquid and prepolymer-P liquid will be respectively stir 30 minutes under vacuum tightness is the vacuum condition of 0.1Mpa; Stirring the back is to mix at 1: 0.8 according to prepolymer-R liquid and prepolymer-P liquid by weight, and it is poured in the above-mentioned mould that metal shaft is housed from top to bottom by sealed tube; Be to carry out twice curing under 80 ℃ the condition in temperature, each time of solidifying is 30 minutes; Solidify the back and carry out the demoulding, be fixed with the polyurethane elastomer of metal shaft in obtaining after grinding after the demoulding, cutting at mould inside coating release agent-KRA1; The surface resistance of the elastic layer that forms is 10
5～10
10Ω .cm.Surfaceness is less than 5 microns.Shore hardness 40～80 degree;
The composition of making the development superficial layer in the table 3 is mixed by its parts by weight, the mixing back stirs with stirring machine and forms surperficial spray coating liquor, be sprayed on the polyurethane elastomer surface then, after solidifying 30 minutes under the condition of 100 ℃ of temperature, be formed on the polyurethane elastomer surface then and form the development superficial layer; Its surface resistance and polyurethane elastomer are approaching, and thickness is 10～40 microns, and surfaceness is less than 3 microns.
The developer roll of making by said method comprises a metal shaft, and described metal shaft is coated with 0.2～0.4 micron bonding coat; Be bonded with polyurethane elastomer on the metal shaft, it is 10～40 μ m development superficial layers that described polyurethane elastomer surface is coated with thickness.
Embodiment 2
Choose stainless steel as metal shaft, adopt cleaning machine that metal shaft was cleaned 1～2 minute; At room temperature dry then; Dry back at metal shaft surface-coated cementing agent, the isopropyl alcohol that described cementing agent by weight portion is: 35 parts; Toluene: 35 parts; Ethanol: 10 parts; Phenol: 3 parts; Methyl alcohol: 1 part; Formaldehyde: make for 0.01 part; The thickness that applies is 0.2～0.4 micron, through being heat treated under 90 ℃ the condition in temperature, the above-mentioned metal shaft of handling well is put into the mould preheating 20 minutes, 60 ℃ of preheat temperatures then;
After the composition of forming prepolymer-R liquid in the table 2 mixed by its weight portion, by homo-mixer stir electroconductive stuffing is uniformly dispersed after; Prepare according to the composition and the content thereof of prepolymer in the table 1-P liquid then; Preparation back prepolymer-R liquid and prepolymer-P liquid will be respectively stir 60 minutes under vacuum tightness is the vacuum condition of 0.15Mpa; Stirring the back is to mix at 1: 0.9 according to prepolymer-R liquid and prepolymer-P liquid by weight, and it is poured in the above-mentioned mould that metal shaft is housed from top to bottom by sealed tube; Be to carry out twice curing under 120 ℃ the condition in temperature, each time of solidifying is 20 minutes; Solidify the back and carry out the demoulding, be fixed with the polyurethane elastomer of metal shaft in obtaining after grinding after the demoulding, cutting at mould inside coating release agent-KRA1; The surface resistance of the elastic layer that forms is 10
5～10
10Ω .cm.Surfaceness is less than 5 microns.Shore hardness 40～80 degree;
The composition of making the development superficial layer in the table 3 is mixed by its parts by weight, the mixing back stirs with stirring machine and forms surperficial spray coating liquor, be sprayed on the polyurethane elastomer surface then, after solidifying 20 minutes under the condition of 120 ℃ of temperature, be formed on the polyurethane elastomer surface then and form the development superficial layer; Its surface resistance and polyurethane elastomer are approaching, and thickness is 10～40 microns, and surfaceness is less than 3 microns.
Embodiment 3
Choose stainless steel as metal shaft, adopt cleaning machine that metal shaft was cleaned 1～2 minute; At room temperature dry then; Dry back at metal shaft surface-coated cementing agent, the isopropyl alcohol that described cementing agent by weight portion is: 35 parts; Toluene: 35 parts; Ethanol: 15 parts; Phenol: 7 parts; Methyl alcohol: 2 parts; Formaldehyde: make for 0.1 part; The thickness that applies is 0.2～0.4 micron, through being heat treated under 100 ℃ the condition in temperature, the above-mentioned metal shaft of handling well is put into the mould preheating 15 minutes, 70 ℃ of preheat temperatures then;
After the composition of forming prepolymer-R liquid in the table 2 mixed by its weight portion, by homo-mixer stir electroconductive stuffing is uniformly dispersed after; Prepare according to the composition and the content thereof of prepolymer in the table 1-P liquid then; Preparation back prepolymer-R liquid and prepolymer-P liquid will be respectively stir 60 minutes under vacuum tightness is the vacuum condition of 0.15Mpa; Stirring the back is to mix at 1: 1 according to prepolymer-R liquid and prepolymer-P liquid by weight, and it is poured in the above-mentioned mould that metal shaft is housed from top to bottom by sealed tube; Be to carry out twice curing under 150 ℃ the condition in temperature, each time of solidifying is 15 minutes; Solidify the back and carry out the demoulding, be fixed with the polyurethane elastomer of metal shaft in obtaining after grinding after the demoulding, cutting at mould inside coating release agent-KRA1; The surface resistance of the elastic layer that forms is 10
5～10
10Ω .cm.Surfaceness is less than 5 microns.Shore hardness 40～80 degree;
The composition of making the development superficial layer in the table 3 is mixed by its parts by weight, the mixing back stirs with stirring machine and forms surperficial spray coating liquor, be sprayed on the polyurethane elastomer surface then, after solidifying 20 minutes under the condition of 150 ℃ of temperature, be formed on the polyurethane elastomer surface then and form the development superficial layer; Its surface resistance and polyurethane elastomer are approaching, and thickness is 10～40 microns, and surfaceness is less than 3 microns.
Embodiment 4
Choose the hard chromium-plated steel as metal shaft, adopt cleaning machine that metal shaft was cleaned 1～2 minute; At room temperature dry then; Dry back at metal shaft surface-coated cementing agent, the isopropyl alcohol that described cementing agent by weight portion is: 40 parts; Toluene: 40 parts; Ethanol: 10 parts; Phenol: 8 parts; Methyl alcohol: 1 part; Formaldehyde: make for 0.05 part; The thickness that applies is 0.2～0.4 micron, through being heat treated under 120 ℃ the condition in temperature, the above-mentioned metal shaft of handling well is put into the mould preheating 10 minutes, 90 ℃ of preheat temperatures then;
After the composition of forming prepolymer-R liquid in the table 2 mixed by its weight portion, by homo-mixer stir electroconductive stuffing is uniformly dispersed after; Prepare according to the composition and the content thereof of prepolymer in the table 1-P liquid then; Preparation back prepolymer-R liquid and prepolymer-P liquid will be respectively stir 90 minutes under vacuum tightness is the vacuum condition of 0.2Mpa; Stirring the back is to mix at 1: 1 according to prepolymer-R liquid and prepolymer-P liquid by weight, and it is poured in the above-mentioned mould that metal shaft is housed from top to bottom by sealed tube; Be to carry out twice curing under 180 ℃ the condition in temperature, each time of solidifying is 10 minutes; Solidify the back and carry out the demoulding, be fixed with the polyurethane elastomer of metal shaft in obtaining after grinding after the demoulding, cutting at mould inside coating release agent-KRA1; The surface resistance of the elastic layer that forms is 10
5～10
10Ω .cm.Surfaceness is less than 5 microns.Shore hardness 40～80 degree;
The composition of making the development superficial layer in the table 3 is mixed by its parts by weight, the mixing back stirs with stirring machine and forms surperficial spray coating liquor, be sprayed on the polyurethane elastomer surface then, after solidifying 10 minutes under the condition of 180 ℃ of temperature, be formed on the polyurethane elastomer surface then and form the development superficial layer; Its surface resistance and polyurethane elastomer are approaching, and thickness is 10～40 microns, and surfaceness is less than 3 microns.
The technological process of embodiment 5 repeats no more with embodiment 1; Embodiment 6～10 adopts composition and the content thereof in table 1 and the table 2 to make polyurethane elastomer; Composition in the table 4 and content thereof are as the composition of preparation development superficial layer, 50～100 ℃ of the temperature that its superficial layer solidifies; 10～30 minutes set times; Other technological process repeats no more with embodiment 2.
Randomly draw 10 in the developer roll sample of the foregoing description 1～10 preparation; Its performance is tested, and the result of test is as shown in table 5:
Table 5: the performance of developer roll of the present invention
| Sequence number | Interventions Requested | Examination criteria | Testing tool | Detect frequency |
| 1 | Visual examination | Good | Magnifier | By national standard |
| 2 | The product diameter | Φ14.10 | External measuring instrument | By national standard |
| 3 | Moulding length | 227.8±0.2 | Vernier caliper | By national standard |
| 4 | Short end | 15.2±0.2 | Vernier caliper | By national standard |
| 5 | Long end | 23.8±0.2 | Vernier caliper | By national standard |
| 6 | The depth of parallelism | 0.05 below | The concentricity measuring instrument | By national standard |
| 7 | The product concentricity | 0.03 below | The concentricity measuring instrument | By national standard |
| 8 | Hardness | 55-70 | Sclerometer | By national standard |
| 9 | Roughness | 1.8 below the μ m | Roughness tester | By national standard |
| 10 | Resistivity | 10 8.0-10 10.0Ω·cm | The surface resistance tester | By national standard |
| 11 | Security | No abnormal | Drying oven | 100 ℃, 1 hour no abnormal |
| 12 | Contaminative | No abnormal | 30 no abnormal | |
| 13 | Printing test | 1.40 more than | 1.30 more than | |
| 14 | Elasticity test | No abnormal | No abnormal | |
| 15 | The Environmental security test | No abnormal | NN, HH, the LL user mode is no abnormal | |
| 16 | Compression deformation rate | No abnormal | Use and shut down back 30 days, test after the unusual standby |
As can be seen from Table 5: developer roll uniform component of the present invention, content reasonable mixture ratio; Form the superficial layer of balanced resistance value on the developer roll surface, have good developing performance; After the printing secret note and contamination phenomenon can not appear; Have suitable elasticity, heat resistance is good, environmental stability is good and anti-wear performance is strong; And surfaceness and deformation rate are low.
Specific embodiment described in the present invention only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although the present invention has been made detailed explanation and has quoted some instantiations as proof, to those skilled in the art, only otherwise leave that the spirit and scope of the present invention can be done various variations or correction is obvious.
Claims (18)
1. developer roll, comprise a metal shaft, be bonded with polyurethane elastomer on the described metal shaft, it is 10～40 μ m development superficial layers that described polyurethane elastomer surface is coated with thickness, described polyurethane elastomer is made by prepolymer-R liquid and prepolymer-P liquid, and wherein said prepolymer-R liquid mainly is grouped into by the one-tenth of following weight portion: 50～80 parts of polyether glycols, 10～20 parts of polyethylene glycols, 3～10 parts of electroconductive stuffings, 0.1～0.5 part of catalyzer, 2～7 parts of crosslinking chemicals; Prepolymer-P liquid mainly is grouped into by the one-tenth of following weight portion: 92～98 parts of isocyanate, 2～8 parts of polyether glycols.
2, developer roll according to claim 1 is characterized in that: described development superficial layer is made by the composition of following weight parts:
Conductive carbon black: 3～8 parts; Spreading agent: 20～40 parts; Hybrid resin: 200～350 parts;
Silicon dioxide: 3～7 parts; PEF: 0.1～0.5 part; Defoamer: 1～5 part;
Organic solvent: 300～600 parts.
3, developer roll according to claim 2 is characterized in that: described spreading agent is made up of following component in percentage by weight:
Acrylic acid multipolymer: 30%～50%; 1-Methoxy-2-propyl acetate: 20%～40%;
Butyl glycol ether: 20%～40%.
4, developer roll according to claim 2 is characterized in that: described hybrid resin is made up of following component in percentage by weight:
Acrylic acid resin: 60%～80%; Isobutyl alcohol: 5%～10%; Methylisobutylketone: 5%～10%; All the other are aromatic hydrocarbon.
5, developer roll according to claim 2 is characterized in that: described defoamer is made up of following component in percentage by weight:
Silicon resin copolymer: 10%～30%; Hydroxyl ethyl acetate: 5%～10%; Butyl glycol ether: 0.5%～2%; All the other are solvent.
6, developer roll according to claim 2 is characterized in that: described organic solvent is an organic solvent of ketone.
7, developer roll according to claim 1 is characterized in that: described development superficial layer is mainly made by the composition of following weight parts:
Nylon: 20～50 parts; Silicon dioxide: 2.0～5.0 parts; PEF: 0.1～0.5 part
Organic solvent: 600～1000 parts.
8, developer roll according to claim 7 is characterized in that: described nylon is pure molten nylon.
9, developer roll according to claim 7 is characterized in that: described organic solvent is an alcohol organic solvent.
10, developer roll according to claim 1 is characterized in that: described electroconductive stuffing is a CNT liquid, and described CNT liquid is made by nano level phosphoric acid hydrocarbon salt and sodium chloride.
11, a kind of preparation method as the described developer roll of claim 1～10, this method may further comprise the steps:
A, metal shaft surface treatment: metal shaft cleaning, dry back are evenly scribbled cementing agent on its surface, then by stand-by after the preheating in the mould of packing into after the heat treated;
B, make polyurethane elastomer: after the composition that will form prepolymer-R liquid mixes, stir by homo-mixer and electroconductive stuffing to be uniformly dispersed afterwards and prepolymer-P liquid stirs respectively under vacuum condition; Stir back prepolymer-R liquid and prepolymer-P liquid and be by weight 1: 0.8～1.0 and mix, and it is poured in the above-mentioned mould that metal shaft is housed is cured, be fixed with the polyurethane elastomer of metal shaft in obtaining after curing and demolding, grinding, the cutting;
C, sprayed surface layer: the polyurethane elastomer surface that is fixed with metal shaft in above-mentioned evenly sprays the development superficial layer, obtains developer roll after being heating and curing then 20～60 minutes,
Wherein said prepolymer-R liquid mainly is grouped into by the one-tenth of following weight portion: 50～80 parts of polyether glycols, 10～20 parts of polyethylene glycols, 3～10 parts of electroconductive stuffings, 0.1～0.5 part of catalyzer, 2～7 parts of crosslinking chemicals; Prepolymer-P liquid mainly is grouped into by the one-tenth of following weight portion: 92～98 parts of isocyanate, 2～8 parts of polyether glycols.
12, the preparation method of developer roll according to claim 11 is characterized in that: the thickness that the metal shaft surface described in the steps A evenly scribbles cementing agent is 0.2～0.4 μ m, and the one-tenth that described cementing agent mainly contains following weight portion is grouped into:
Alcohols material: 30～60 parts; Arene material: 20～50 parts; Phenol: 3～8 parts
Aldehyde material: 0.01～1.0 part.
13, the preparation method of developer roll according to claim 11 is characterized in that: the temperature of preheating described in the steps A is 40～90 ℃, and be 8～30 minutes preheating time.
14, the preparation method of developer roll according to claim 11 is characterized in that: the vacuum tightness among the step B during vacuum stirring is 0.1～0.2Mpa, and the time of vacuum stirring is 5～10 minutes.
15, the preparation method of developer roll according to claim 11 is characterized in that: the prepolymer described in the step B-R liquid and prepolymer-P liquid is to be poured into from bottom to top in the above-mentioned mould that metal shaft is housed by sealed tube.
16, the preparation method of developer roll according to claim 11 is characterized in that: the solidification process described in the step B is the regelate process, and each time of solidifying is 10 minutes～30 minutes, and solidification temperature is 80～180 ℃.
17, the preparation method of developer roll according to claim 11, it is characterized in that: the process of the spraying development superficial layer described in the step C is: the composition that will make the development superficial layer mixes by its parts by weight, the mixing back stirs with stirring machine and forms surperficial spray coating liquor, be sprayed on the polyurethane elastomer surface then, after solidifying 20～60 minutes under the condition of 50～180 ℃ of temperature, form the development superficial layer then on the polyurethane elastomer surface.
18, the preparation method of developer roll according to claim 11 is characterized in that: the thickness of the development superficial layer described in the step C is 10～40 μ m, and surfaceness is less than 3 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100714730A CN100535786C (en) | 2007-09-28 | 2007-09-28 | Developer roll and method of producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100714730A CN100535786C (en) | 2007-09-28 | 2007-09-28 | Developer roll and method of producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101178560A CN101178560A (en) | 2008-05-14 |
| CN100535786C true CN100535786C (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100714730A Expired - Fee Related CN100535786C (en) | 2007-09-28 | 2007-09-28 | Developer roll and method of producing the same |
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| Country | Link |
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| CN (1) | CN100535786C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI414435B (en) * | 2011-01-28 | 2013-11-11 | Green Rich Technology Inc | Photosensitive drum of the conductive device |
| TWI417688B (en) * | 2011-01-28 | 2013-12-01 | Green Rich Technology Inc | Photosensitive drum of the conductive device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102725698B (en) * | 2010-02-05 | 2014-12-03 | 住友理工株式会社 | Developer roller for electrophotographic equipment |
| CN102436161B (en) * | 2011-12-26 | 2014-05-07 | 珠海赛纳打印科技股份有限公司 | Conductive elastomer roller and manufacturing method thereof as well as image forming device |
| CN103105761B (en) * | 2012-12-25 | 2015-10-28 | 深圳市乐普泰科技股份有限公司 | Conductive rubber roller and imaging device |
| CN108490750B (en) * | 2018-05-11 | 2021-04-23 | 湖北大学 | Developing roller and preparation method thereof |
| CN114670382A (en) * | 2022-03-28 | 2022-06-28 | 宏淳辊轴科技启东有限公司 | Preparation method of roller shaft for medical thermal imaging film printer |
-
2007
- 2007-09-28 CN CNB2007100714730A patent/CN100535786C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI414435B (en) * | 2011-01-28 | 2013-11-11 | Green Rich Technology Inc | Photosensitive drum of the conductive device |
| TWI417688B (en) * | 2011-01-28 | 2013-12-01 | Green Rich Technology Inc | Photosensitive drum of the conductive device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101178560A (en) | 2008-05-14 |
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