CN116300351A - Positive-charging double-layer organic photoconductor drum and preparation method thereof - Google Patents
Positive-charging double-layer organic photoconductor drum and preparation method thereof Download PDFInfo
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 25
- 239000012860 organic pigment Substances 0.000 claims abstract description 25
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- 229920000515 polycarbonate Polymers 0.000 claims description 16
- 239000004417 polycarbonate Substances 0.000 claims description 16
- 229920002545 silicone oil Polymers 0.000 claims description 16
- 239000003963 antioxidant agent Substances 0.000 claims description 15
- 230000003078 antioxidant effect Effects 0.000 claims description 15
- 230000005525 hole transport Effects 0.000 claims description 13
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 12
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 12
- 239000003960 organic solvent Substances 0.000 claims description 12
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
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- SJHHDDDGXWOYOE-UHFFFAOYSA-N oxytitamium phthalocyanine Chemical compound [Ti+2]=O.C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 SJHHDDDGXWOYOE-UHFFFAOYSA-N 0.000 claims description 10
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- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical group N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims description 6
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical group C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- XKZQKPRCPNGNFR-UHFFFAOYSA-N 2-(3-hydroxyphenyl)phenol Chemical compound OC1=CC=CC(C=2C(=CC=CC=2)O)=C1 XKZQKPRCPNGNFR-UHFFFAOYSA-N 0.000 claims description 3
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- SSSJRLUYNHCGEB-UHFFFAOYSA-N 1-n',1-n'-bis(3-methylphenyl)-4-phenylcyclohexa-2,4-diene-1,1-diamine Chemical compound CC1=CC=CC(N(C=2C=C(C)C=CC=2)C2(N)C=CC(=CC2)C=2C=CC=CC=2)=C1 SSSJRLUYNHCGEB-UHFFFAOYSA-N 0.000 claims description 2
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- QJQMLCUZRRVCPJ-UHFFFAOYSA-N 4-(3,5-ditert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)-2,6-dimethylcyclohexa-2,5-dien-1-one Chemical compound C1=C(C)C(=O)C(C)=CC1=C1C=C(C(C)(C)C)C(=O)C(C(C)(C)C)=C1 QJQMLCUZRRVCPJ-UHFFFAOYSA-N 0.000 description 4
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/043—Photoconductive layers characterised by having two or more layers or characterised by their composite structure
- G03G5/047—Photoconductive layers characterised by having two or more layers or characterised by their composite structure characterised by the charge-generation layers or charge transport layers
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/05—Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
- G03G5/0525—Coating methods
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/06—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being organic
- G03G5/0664—Dyes
- G03G5/0696—Phthalocyanines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
The invention relates to a positive-charging double-layer organic photoconductor drum and a preparation method thereof, and belongs to the technical field of organic photoconductor drums. The organic photoconductor drum consists of an aluminum base pipe, a charge generation transmission layer uniformly coated on the outer surface of the aluminum base pipe and a charge carrier layer uniformly coated on the outer surface of the charge generation transmission layer; the organic photoconductor drum is of a positive charging double-layer structure, organic pigment is added in the charge generation transmission layer, and the charge carrier layer does not need to be added with the organic pigment, so that the charge carrier layer can be added with high-content resin, and the wear resistance and the printing service life of the organic photoconductor drum are obviously improved; the sensitivity and the residue of the organic photoconductor drum can be controlled by regulating and controlling the thicknesses of the charge generation transmission layer and the charge carrier layer, so that the switching of different types can be tested on the same production platform, and the printing quality requirement can be met; the positive-charging double-layer organic photoconductor drum is suitable for various types of positive-charging laser printers, and has the advantages of wide application range, simple preparation process and low cost.
Description
Technical Field
The invention relates to a positive-charging double-layer organic photoconductor drum and a preparation method thereof, and belongs to the technical field of organic photoconductor drums.
Background
An organic photoconductor drum (OPC) is a core component of an imaging system of a laser printer and an electrostatic copier, and the working principle of the OPC drum is that an OPC surface can be charged with a layer of uniform positive charge through electrode wire charging or charging roller contact charging; when 780nm wavelength irradiates the surface of the OPC drum, the charge generating material is stimulated to generate positive and negative charge pairs, the positive and negative charge pairs are separated under the action of an electric field, negative charges are transmitted to the surface of the OPC drum under the efficient transmission action of the charge transmitting material, and partial charges are neutralized to form an electrostatic latent image on the surface of the OPC drum; and finally obtaining the printed image or text through development, transfer printing and fixation.
The positive organic photoconductor drum can be further divided into a single-layer functional composite type and a multi-layer functional separation type according to a coating structure when in use. The existing market of positive charging is more single-layer drums, although the coating process is simple, the existence of organic pigment in the coating liquid can lead to unstable solution state, the storage is difficult, the service life of a drum core is short, the types are numerous, the photoelectric characteristic requirement on the drum is complex, the existing two-layer positive-charge drum in the prior art is produced by using the same production coating liquid, the product types are single, the production process is complex because the two-layer positive-charge drums with different types are required to be switched between different production platforms, and when the various coating liquids are switched, partial solution is lost due to liquid discharge, and a large amount of solvent is consumed for cleaning the coating cylinder, so that resources are wasted; in addition, the positive charging drum market is smaller than the negative charging drum, and the production platform is relatively single.
Disclosure of Invention
Aiming at the defects existing in the prior art, one of the purposes of the invention is to provide a positive charging double-layer organic photoconductor drum;
the second purpose of the invention is to provide a preparation method of the positive-charging double-layer organic photoconductor drum.
The aim of the invention is achieved by the following technical scheme.
A positively charged bilayer organic photoconductor drum comprised of an aluminum substrate, a charge generation transport layer, and a charge carrier layer; the charge generation and transmission layer is uniformly coated on the outer surface of the aluminum base pipe, and the charge carrier layer is uniformly coated on the outer surface of the charge generation and transmission layer;
the charge generation and transport layer is composed of an organic pigment, an electron transport material A and a resin, wherein the resin: electron transport layer material a: the mass ratio of the organic pigment is 100 (1-50): (50-200); preferably, the resin: electron transport layer material a: the mass ratio of the organic pigment is 100 (15-37.5): (50-150);
the resin is polyvinyl butyral resin or acetal resin, and the molecular weight is 30000-150000; preferably, the resin is a polyvinyl butyral resin having a molecular weight of 30000 to 80000;
the organic pigment is phthalocyanine pigment; preferably, the organic pigment is Y-type titanyl phthalocyanine;
the electron transport material A is 3, 5-dimethyl-3 ',5' -di-tert-butyl-4, 4' -diphenoquinone, and has the structural formula:
the charge carrier layer is composed of Polycarbonate (PC), an electron transport layer material B, a hole transport material, silicone oil and an antioxidant; wherein, polycarbonate: electron-transporting material B: hole transport material: silicone oil: the mass ratio of the antioxidant is 100 (1-50): (50-100): (0.1-2): (0.1-2); preferably, the polycarbonate: electron-transporting material B: hole transport material: silicone oil: the mass ratio of the antioxidant is 100 (20-50): (60-90): (0.8-1): (1-2);
the molecular weight of the Polycarbonate (PC) is 20000-150000; preferably, the molecular weight of the Polycarbonate (PC) is 30000 to 100000;
the electron transport material B is 3,3', 5' -tetra-tert-butyl diphenol quinone, and has the structural formula:
the hole transport material is a conventional hole transport material in the technical field of organic photoconductor drums; preferably, the hole transport material is N, N-bis (3-methylphenyl) -1, 1-biphenyl-4, 4-diamine (m-TPD);
the antioxidant is a hole transport material which is conventional in the technical field of organic photoconductor drums; preferably, the antioxidant is 1076;
preferably, the charge generation transport layer has a thickness of 0.5 to 5 μm; the thickness of the charge carrier layer is 10-40 mu m;
further preferably, the thickness of the charge generation transport layer is 0.2 to 2 μm; the thickness of the charge carrier layer is 25-32 mu m;
more preferably, the charge generation transport layer has a thickness of 1 to 1.5 μm; the thickness of the charge carrier layer is 25-30 mu m.
The invention discloses a preparation method of a positive-charging double-layer organic photoconductor drum, which comprises the following steps:
(1) Mechanically crushing the resin, the electron transport material A and the organic pigment and uniformly dispersing the crushed resin, the electron transport material A and the organic pigment in the organic solvent A to obtain a coating liquid A; uniformly coating the coating liquid A on the outer surface of an aluminum base pipe, and drying to form a charge generation transmission layer;
the solid content in the coating liquid A is 1-20% by weight percent; preferably, the organic solvent A is used in an amount such that the solid content in the coating liquid A is 4 to 5% by weight;
preferably, the organic solvent A is at least one of cyclohexanone and butanone;
preferably, adding a dispersion medium into the organic solvent A, and performing wet dispersion by adopting a ball mill, a sand mill, a grinding machine or an oscillator until the particle size of the organic pigment in the dispersion liquid is below 800 nm; the dispersion medium comprises glass beads or zirconia beads;
preferably, the coating speed in the step (1) is 60-500 mm/min, the drying temperature is 70-100 ℃, and the drying time is 15-40 min;
further preferably, the coating speed in the step (1) is 120-160 mm/min, the drying temperature is 75 ℃, and the drying time is 20min;
(2) Uniformly dispersing polycarbonate, an electron transport material B, a hole transport material, silicone oil and an antioxidant in an organic solvent B to obtain a coating liquid B; uniformly coating the coating liquid B on the outer surface of the charge generation and transmission layer prepared in the step (1), and drying to form a charge carrier layer;
the solid content in the coating liquid B is 10-50% by weight percent; preferably, the solid content in the coating liquid B is 20% by weight;
preferably, the organic solvent B is dichloromethane or tetrahydrofuran;
preferably, the coating speed in the step (2) is 60-500 mm/min, the drying temperature is 80-150 ℃, and the drying time is 1-2 h;
further preferably, the coating speed in the step (2) is 180-260 mm/min, the drying temperature is 130 ℃, and the drying time is 1.5h.
Advantageous effects
(1) The invention provides a positive charging double-layer organic photoconductor drum, which has a positive charging double-layer structure, wherein the outer surface of an aluminum base pipe is uniformly distributed with a charge generation transmission layer, and the outer surface of the charge generation transmission layer is uniformly distributed with a charge carrier layer; because the organic pigment is added in the charge generation and transmission layer, the charge carrier layer does not need to be added with the organic pigment, thereby adding higher-content resin in the charge carrier layer, obviously improving the wear resistance of the organic photoconductor drum and prolonging the printing service life.
(2) The invention provides a preparation method of a positive-charging double-layer organic photoconductor drum, wherein a charge generation transmission layer is prepared by coating a coating liquid A, and a charge carrier layer is prepared by coating a coating liquid B; the coating liquid A has low solid content and good stability, and organic pigment is uniformly dispersed in the solvent without sedimentation by adjusting the solid content and the mass ratio of each component in the coating liquid A; the coating liquid B contains no organic pigment, so the state is more stable than the coating liquid a; therefore, the coating liquid A and the coating liquid B are not easy to settle, convenient to store, simple in production and processing technology and low in manufacturing cost.
(3) The invention provides a preparation method of a positive-charging double-layer organic photoconductor drum, which is characterized in that different types of coating liquid are required to be replaced when different types of organic photoconductor drums are produced on the same production platform due to different sensitivities and residual potentials of different types of organic photoconductor drums, so that resources are wasted; the method can control the sensitivity and the residual potential of the organic photoconductor drum by regulating and controlling the thicknesses of the charge generation transmission layer and the charge carrier layer on the premise of ensuring the printing quality, thereby effectively solving the defect of complex process switching between production and manufacturing of various positive electricity models and reducing the resource waste.
(4) The invention provides a preparation method of a positive-charging double-layer organic photoconductor drum, which comprises the steps of adding a dispersion medium into an organic solvent, adopting a ball mill, a sand mill, a grinding machine or an oscillator to carry out wet dispersion, and dispersing the particle size of an organic pigment below 800nm, so that the organic pigment is uniformly and stably dispersed, the carrier generation efficiency of a charge generation transmission layer is improved, and the photoelectric property of the organic photoconductor drum is effectively improved.
(5) The invention provides a positive-charging double-layer organic photoconductor drum which is suitable for various types of electric laser printers or electrostatic copying devices, long in service life, good in printing quality and wide in application range.
Detailed Description
The present invention will be further described with reference to the following detailed description, wherein the processes are conventional, and wherein the starting materials are commercially available from the open market, unless otherwise specified.
Example 1
A positively charged bilayer organic photoconductor drum comprised of an aluminum substrate, a charge generation transport layer, and a charge carrier layer; the charge generation and transmission layer is uniformly coated on the outer surface of the aluminum base pipe, and the charge carrier layer is uniformly coated on the outer surface of the charge generation and transmission layer;
the method for preparing the positive-charging double-layer organic photoconductor drum comprises the following steps:
(1) Using a ball mill, taking zirconia beads as a dispersion medium, crushing 40g of polyvinyl butyral resin with a molecular weight of 30000-80000, 6g of 3, 5-dimethyl-3 ',5' -di-tert-butyl-4, 4' -biphenyl quinone and 60g Y-type titanyl phthalocyanine, and performing wet dispersion in 2000g of cyclohexanone for 5 hours until the particle size of Y-type titanyl phthalocyanine particles in the dispersion is below 800nm to obtain a coating liquid A; uniformly coating the coating liquid A on the outer surface of an aluminum base pipe at a coating speed of 120mm/min, and drying at 75 ℃ for 20min to form a charge generation and transmission layer with a thickness of 1 mu m;
wherein, polyvinyl butyral resin: electron transport layer material a: the mass ratio of the Y-type oxytitanium phthalocyanine is 100:15:150;
the solid content in the coating liquid A is 5 weight percent;
(2) Dispersing 50g of polycarbonate resin PC300 with a molecular weight of 30000-100000, 25g of 3,3', 5' -tetra-tert-butyl diphenol quinone, 45g m-TPD, 0.4g of silicone oil and 0.5g of antioxidant 1076 in 480g of methylene dichloride to obtain a coating liquid B, uniformly coating the coating liquid B on the outer surface of the charge generation transmission layer prepared in the step (1) at a coating speed of 180mm/min, and drying at 130 ℃ for 1.5h to form a charge carrier layer with a thickness of 25+/-2 mu m;
wherein, polycarbonate PC300: electron-transporting material B: m-TPD: silicone oil: the mass ratio of the antioxidant is 100:50:90:0.8:1, a step of;
the solid content in the coating liquid B is 20% by weight.
Example 2
A positively charged bilayer organic photoconductor drum comprised of an aluminum substrate, a charge generation transport layer, and a charge carrier layer; the charge generation and transmission layer is uniformly coated on the outer surface of the aluminum base pipe, and the charge carrier layer is uniformly coated on the outer surface of the charge generation and transmission layer;
the method for preparing the positive-charging double-layer organic photoconductor drum comprises the following steps:
(1) Using a ball mill, taking zirconia beads as a dispersion medium, crushing 40g of polyvinyl butyral resin with a molecular weight of 30000-80000, 6g of 3, 5-dimethyl-3 ',5' -di-tert-butyl-4, 4' -biphenyl quinone and 60g Y-type titanyl phthalocyanine, and performing wet dispersion in 2000g of cyclohexanone for 5 hours until the particle size of Y-type titanyl phthalocyanine particles in the dispersion is below 800nm to obtain a coating liquid A; uniformly coating the coating liquid A on the outer surface of an aluminum base pipe at a coating speed of 160mm/min, and drying at 75 ℃ for 20min to form a charge generation and transmission layer with the thickness of 1.5 mu m;
wherein, polyvinyl butyral resin: electron transport layer material a: the mass ratio of the Y-type oxytitanium phthalocyanine is 100:15:150;
the solid content in the coating liquid A is 5 weight percent;
(2) 50g of polycarbonate resin PCZ300, 25g of 3,3', 5' -tetra-tert-butyldiphenol quinone, 45gm-TPD, 0.4g of silicone oil and 0.5g of antioxidant 1076 were dispersed in 480g of methylene chloride to obtain a coating liquid B, the coating liquid B was uniformly coated on the outer surface of the charge generation transport layer prepared in the step (1) at a coating speed of 200mm/min, and dried at 130 ℃ for 1.5 hours to form a charge carrier layer having a thickness of 27.+ -. 2 μm;
wherein, polycarbonate PC300: electron-transporting material B: m-TPD: silicone oil: the mass ratio of the antioxidant is 100:50:90:0.8:1, a step of;
the solid content in the coating liquid B is 20% by weight.
Example 3
A positively charged bilayer organic photoconductor drum comprised of an aluminum substrate, a charge generation transport layer, and a charge carrier layer; the charge generation and transmission layer is uniformly coated on the outer surface of the aluminum base pipe, and the charge carrier layer is uniformly coated on the outer surface of the charge generation and transmission layer;
the method for preparing the positive-charging double-layer organic photoconductor drum comprises the following steps:
(1) Using a ball mill, taking zirconia beads as a dispersion medium, crushing 40g of polyvinyl butyral resin with a molecular weight of 30000-80000, 6g of 3, 5-dimethyl-3 ',5' -di-tert-butyl-4, 4' -biphenyl quinone and 60g Y-type titanyl phthalocyanine, and performing wet dispersion in 2000g of cyclohexanone for 5 hours until the particle size of Y-type titanyl phthalocyanine particles in the dispersion is below 800nm to obtain a coating liquid A; uniformly coating the coating liquid A on the outer surface of an aluminum base pipe at a coating speed of 135mm/min, and drying at 75 ℃ for 20min to form a charge generation and transmission layer with the thickness of 1.2 mu m;
wherein, polyvinyl butyral resin: electron transport layer material a: the mass ratio of the Y-type oxytitanium phthalocyanine is 100:15:150;
the solid content in the coating liquid A is 4% by weight;
(2) 50g of polycarbonate resin PCZ500, 25g of 3,3', 5' -tetra-tert-butyldiphenol quinone, 45gm-TPD, 0.4g of silicone oil and 0.5g of antioxidant 1076 were dispersed in 480g of methylene chloride to obtain a coating liquid B; uniformly coating the coating liquid B on the outer surface of the charge generation transmission layer prepared in the step (1) at a coating speed of 260mm/min, and drying at 130 ℃ for 1.5h to form a charge carrier layer with a thickness of 30+/-2 mu m;
wherein, polycarbonate PC500: electron-transporting material B: m-TPD: silicone oil: the mass ratio of the antioxidant is 100:50:90:0.8:1, a step of;
the solid content in the coating liquid B is 20% by weight.
Example 4
A positively charged bilayer organic photoconductor drum comprised of an aluminum substrate, a charge generation transport layer, and a charge carrier layer; the charge generation and transmission layer is uniformly coated on the outer surface of the aluminum base pipe, and the charge carrier layer is uniformly coated on the outer surface of the charge generation and transmission layer;
the method for preparing the positive-charging double-layer organic photoconductor drum comprises the following steps:
(1) Using a ball mill, taking zirconia beads as a dispersion medium, crushing 40g of polyvinyl butyral resin with a molecular weight of 30000-80000, 15g of 3, 5-dimethyl-3 ',5' -di-tert-butyl-4, 4' -biphenyl quinone and 20g Y-type titanyl phthalocyanine, and performing wet dispersion in 1500g of cyclohexanone for 5 hours until the particle size of Y-type titanyl phthalocyanine particles in the dispersion is below 800nm to obtain a coating liquid A; uniformly coating the coating liquid A on the outer surface of an aluminum base pipe at a coating speed of 150/min, and drying at 75 ℃ for 20min to form a charge generation and transmission layer with the thickness of 1.2 mu m;
wherein, polyvinyl butyral resin: electron transport layer material a: the mass ratio of the Y-type oxytitanium phthalocyanine is 100:37.5:50;
the solid content in the coating liquid A is 5 weight percent;
(2) 80g of polycarbonate resin PCZ300, 16g of 3,3', 5' -tetra-tert-butyldiphenol quinone, 48gm-TPD, 0.8g of silicone oil and 1.5g of antioxidant 1076 were dispersed in 465g of methylene chloride to obtain a coating liquid B; uniformly coating the coating liquid B on the outer surface of the charge generation transmission layer prepared in the step (1) at a coating speed of 190mm/min, and drying at 130 ℃ for 1.5h to form a charge carrier layer with a thickness of 25.5+/-2 mu m;
wherein, polycarbonate PC300: electron-transporting material B: m-TPD: silicone oil: the mass ratio of the antioxidant is 100:20:60:1:2;
the solid content in the coating liquid B is 20% by weight.
Comparative example 1
Comparative example 1 a single-layer organic photoconductor drum was obtained by uniformly mixing the coating liquid a and the coating liquid B, coating the mixture on an aluminum base pipe, and drying the mixture.
Comparative example 2
Comparative example 2 the coating liquid a and the coating liquid B were uniformly mixed on the basis of example 2 only, and then coated on an aluminum base tube, and dried to obtain a positively charged single-layer organic photoconductor drum.
Comparative example 3
Comparative example 3 a positively charged single-layer organic photoconductor drum was obtained by uniformly mixing the coating liquid a and the coating liquid B, coating the mixture on an aluminum base pipe, and drying the mixture.
The positive-charge double-layer organic photoconductor drums prepared in examples 1 to 4 and the positive-charge single-layer organic photoconductor drums prepared in comparative examples 1 to 3 were subjected to photoelectric performance test using a PDT-2000LTM electric performance tester (manufactured by QEA Co., ltd.) at 20 to 30℃and a Relative Humidity (RH) of 30 to 70%, and the results are shown in Table 1:
table 1 results of photoelectrical property test of photoconductor drums prepared in examples 1 to 4 and comparative examples 1 to 3
As can be seen from the data in table 1, the positive-charge double-layer organic photoconductor drums prepared in examples 1 to 4 are adjustable in sensitivity, controllable in charge potential and residual potential, and slow in decrease in dark decay rate compared with the positive-charge single-layer organic photoconductor drums prepared in comparative examples 1 to 3, so that it is proved that the thicknesses of the coatings prepared by the coating liquid a and the coating liquid B can be controlled to control the sensitivity and the residual potential of the organic photoconductor drums.
The positive-charge double-layer organic photoconductor drums prepared in examples 1 to 4 and the positive-charge single-layer organic photoconductor drums prepared in comparative examples 1 to 3 are respectively applied to HL2240, HL-5240 and HL-6180 positive-electricity laser printers produced by Brother group for service life test, 20000 pages of manuscripts are continuously printed under the environmental conditions that the temperature is (23+/-3) DEG C and the Relative Humidity (RH) is 50-60%, the density of the manuscripts is tested by adopting a spectrodensitometer, the change of the film thickness of the outer layer film of the organic photoconductor drum aluminum tube is tested by adopting a film thickness tester for judging the abrasion condition, and the test results are shown in Table 2 in detail:
table 2 results of print life test of photoconductor drums prepared in examples 1 to 4 and comparative examples 1 to 3
As can be seen from the data in table 2, the print quality and abrasion resistance of the positively charged double-layer organic photoconductor drums prepared in examples 1 to 4 are better than those of the single-layer organic photoconductor drums prepared in comparative examples 1 to 3; the densities of the first manuscript printed and the second manuscript printed by the positive charging double-layer organic photoconductor drums prepared in the embodiments 1-4 are not obviously different, and the positive charging double-layer organic photoconductor drums can be proved to be suitable for various types of electric laser printers by observing the printing quality of the manuscripts, and have wide application range.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A positive charge double-deck organic photoconductor drum, its characterized in that: the organic photoconductor drum consists of an aluminum base tube, a charge generation and transmission layer and a charge carrier layer; the charge generation and transmission layer is uniformly coated on the outer surface of the aluminum base pipe, and the charge carrier layer is uniformly coated on the outer surface of the charge generation and transmission layer;
the charge generation and transport layer is composed of an organic pigment, an electron transport material A and a resin, wherein the resin: electron transport layer material a: the mass ratio of the organic pigment is 100 (1-50): (50-200);
the resin is polyvinyl butyral resin or acetal resin, and the molecular weight is 30000-150000;
the organic pigment is phthalocyanine pigment;
the electron transport material A is 3, 5-dimethyl-3 ',5' -di-tert-butyl-4, 4' -diphenoquinone;
the charge carrier layer is composed of polycarbonate, an electron transport layer material B, a hole transport material, silicone oil and an antioxidant; wherein, polycarbonate: electron-transporting material B: hole transport material: silicone oil: the mass ratio of the antioxidant is 100 (1-50): (50-100): (0.1-2): (0.1-2);
the molecular weight of the polycarbonate is 20000-150000;
the electron transport material B is 3,3', 5' -tetra-tert-butyl diphenol quinone.
2. A positively charged double layer organic photoconductor drum according to claim 1, wherein: resin: electron transport layer material a: the mass ratio of the organic pigment is 100 (15-37.5): (50-150); the resin is polyvinyl butyral resin with the molecular weight of 30000-80000; the organic pigment is Y-type titanyl phthalocyanine;
polycarbonate: electron-transporting material B: hole transport material: silicone oil: the mass ratio of the antioxidant is 100 (20-50): (60-90): (0.8-1): (1-2); the molecular weight of the polycarbonate is 30000-100000; the hole transport material is N, N-di (3-methylphenyl) -1, 1-biphenyl-4, 4-diamine; the antioxidant is 1076.
3. A positively charged double layer organic photoconductor drum according to claim 1 or 2, characterized in that: the thickness of the charge generation and transport layer is 0.5-5 mu m; the thickness of the charge carrier layer is 10-40 mu m.
4. A positively charged double layer organic photoconductor drum according to claim 3, wherein: the thickness of the charge generation and transport layer is 0.2-2 mu m; the thickness of the charge carrier layer is 25-32 mu m.
5. A positively charged double layer organic photoconductor drum according to claim 4, wherein: the thickness of the charge generation and transport layer is 1-1.5 mu m; the thickness of the charge carrier layer is 25-30 mu m.
6. A method for producing the positively charged double-layer organic photoconductor drum according to any one of claims 1 to 5, characterized by: the method comprises the following steps:
(1) Mechanically crushing the resin, the electron transport material A and the organic pigment and uniformly dispersing the crushed resin, the electron transport material A and the organic pigment in the organic solvent A to obtain a coating liquid A; uniformly coating the coating liquid A on the outer surface of an aluminum base pipe, and drying to form a charge generation transmission layer;
the solid content in the coating liquid A is 1-20% by weight percent;
(2) Uniformly dispersing polycarbonate, an electron transport material B, a hole transport material, silicone oil and an antioxidant in an organic solvent B to obtain a coating liquid B; uniformly coating the coating liquid B on the outer surface of the charge generation and transmission layer, and drying to form a charge carrier layer;
the solid content of the coating liquid B is 10-50% by weight percent concentration.
7. The method for manufacturing a positively charged double-layer organic photoconductor drum according to claim 6, wherein: the solid content in the coating liquid A is 4-5% by weight percent concentration; the organic solvent A is at least one of cyclohexanone and butanone; adding a dispersing medium into the organic solvent A, and performing wet dispersion by adopting a ball mill, a sand mill, a grinding machine or an oscillator until the particle size of the organic pigment in the dispersion liquid is below 800 nm; the dispersion medium comprises glass beads or zirconia beads; the coating speed in the step (1) is 60-500 mm/min, the drying temperature is 70-100 ℃, and the drying time is 15-40 min.
8. The method for manufacturing a positively charged double-layer organic photoconductor drum according to claim 6, wherein: the solid content in the coating liquid B is 20 weight percent; the organic solvent B is dichloromethane or tetrahydrofuran; the coating speed in the step (2) is 60-500 mm/min, the drying temperature is 80-150 ℃ and the drying time is 1-2 h.
9. The method for manufacturing a positively charged double-layer organic photoconductor drum according to claim 6, wherein: the coating speed in the step (1) is 120-160 mm/min, the drying temperature is 75 ℃, and the drying time is 20min; the coating speed in the step (2) is 180-260 mm/min, the drying temperature is 130 ℃, and the drying time is 1.5h.
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