US20030207771A1 - Cleaning blade lubricant - Google Patents
Cleaning blade lubricant Download PDFInfo
- Publication number
- US20030207771A1 US20030207771A1 US10/389,609 US38960903A US2003207771A1 US 20030207771 A1 US20030207771 A1 US 20030207771A1 US 38960903 A US38960903 A US 38960903A US 2003207771 A1 US2003207771 A1 US 2003207771A1
- Authority
- US
- United States
- Prior art keywords
- lubricant
- fluoropolymer
- photoconductor
- binder resin
- accordance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/041—Mixtures of base-materials and additives the additives being macromolecular compounds only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/06—Perfluoro polymers
- C10M2213/062—Polytetrafluoroethylene [PTFE]
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/028—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/015—Dispersions of solid lubricants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/015—Dispersions of solid lubricants
- C10N2050/02—Dispersions of solid lubricants dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
Definitions
- Copiers and printers using the electrophotographic process contain photoconductors to create a latent image which is developed with toner.
- the toner on the photoconductor then transfers to paper which then travels through a fuser which fixes the toner on the paper.
- the transfer of toner from the photoconductor to the paper is not 100% efficient.
- the residual toner on the photoconductor must be removed.
- the toner is removed by an elastomeric blade, such as urethane rubber, which scrapes the surface of the photoconductor.
- Liquid dispersions of zinc stearates or graphite fluoride also have been applied to cleaning blades, which provide longer lasting lubrication, as described in U.S. Pat. No. 5,646,718.
- the solvent may be any solvent that is compatible with the polyvinylpyrollidinone and water. Its purpose is to improve the wetting of the coating. Ethanol, where used, also serves to prevent bacterial growth in the solution. This function can also be served by using surfactants and biocides that are compatible with the photoconductor. It is preferable to use a solvent that will evaporate and not present potential photoconductor compatibility problems. A flow and slip, or anti-blocking compound can be added to further reduce the friction between the optical photoconductor and the wiper blade. The following examples are illustrative. Percentages are by weight.
- the ingredients are mixed in a high shear mixer to obtain full dispersion.
- the ingredients are mixed in a high shear mixer for complete dispersion.
- the coatings are applied to the wiper blades by any liquid coating application technique, such as dipping, spraying, flow coating, or brushing.
- the coating material tends to run away from the scraping edge of the blade which forms a right angle corner. It coats the flat surface of both sides of the scraping edge. Most of the optical photoconductor surface wear takes place 1.5 mm-3 mm past the scraping edge, and this is the area where the coating is most useful.
- the coating may be air dried, or dried using heat to accelerate the evaporation of the water and/or solvent.
- a suitable liquid carrier such as a solvent, water, or combinations of solvent and water.
- the anti-blocking compound, or flow and slip compound is added to further reduce the friction between the optical photoconductor surface and that of the wiper blade.
Abstract
A lubricant for wiper blades used to remove residual toner particles from a photoconductive surface comprising a finely divided fluoropolymer and a binder resin typically polyvinylpyrollidinone, applied as a coating using an evaporable vehicle.
Description
- Reference is made to my copending provisional application serial No. 60/376,937 filed May 2, 2002, to which a claim of priority is made.
- Copiers and printers using the electrophotographic process contain photoconductors to create a latent image which is developed with toner. The toner on the photoconductor then transfers to paper which then travels through a fuser which fixes the toner on the paper. The transfer of toner from the photoconductor to the paper is not 100% efficient. The residual toner on the photoconductor must be removed. The toner is removed by an elastomeric blade, such as urethane rubber, which scrapes the surface of the photoconductor.
- The friction between the cleaning blade and the photoconductor wears the surface of the photoconductor. Various lubricating powders have been used to reduce the friction between the photoconductor and the cleaning blade, such as zinc stearate and graphite fluoride applied to the photoconductor surface or to the blade. These powders are also removed by the cleaning blade and thus have little effect on reducing the wear on the photoconductor surface. Powders can also migrate to other components in the electrophotographic system, such as contact charging rollers, and this can result in print defects.
- Liquid dispersions of zinc stearates or graphite fluoride also have been applied to cleaning blades, which provide longer lasting lubrication, as described in U.S. Pat. No. 5,646,718.
- Briefly stated, it is the purpose of the present invention to create a liquid lubricant which will dry to a film that provides long lasting lubrication. This coating contains a fluoropolymer in a binder resin which also lubricates the photoconductor surface.
- The solvent may be any solvent that is compatible with the polyvinylpyrollidinone and water. Its purpose is to improve the wetting of the coating. Ethanol, where used, also serves to prevent bacterial growth in the solution. This function can also be served by using surfactants and biocides that are compatible with the photoconductor. It is preferable to use a solvent that will evaporate and not present potential photoconductor compatibility problems. A flow and slip, or anti-blocking compound can be added to further reduce the friction between the optical photoconductor and the wiper blade. The following examples are illustrative. Percentages are by weight.
- 20% denatured ethanol
- 2.1% polyvinylpyrollidinone (Luviskol K90, BASF)
- 38.2% polytetrafluoroethylene dispersion (Fluoro AQ 50 dispersion, Shamrock Technologies, Inc. Newark N.J. or Dupont 307 A fluoropolymer dispersion)
- 0.50% BYK 341 (Byk Chemie, Wallingford, Conn.) (Flow and Slip composition)
- 39.2% deionized water
- The ingredients are mixed in a high shear mixer to obtain full dispersion.
- 10% denatured ethanol
- 2.1% polyvinylpyrollidinone (Luviskol K90)
- 22.9% polytetrafluorethylene powder (MP 1100, Dupont)
- 0.25% BYK 341 (Byk Chemie, Wallingford Conn.)
- 64.75% deionized water
- The ingredients are mixed in a high shear mixer until completely dispersed.
- 13.75% polytetrafluoroethylene (MP 1100) Dupont
- 1.2% polyvinylpyrollidinone (Luviskol K 90, BASF)
- 0.3% BYK 341 (Byk Chemie, Wallingford, Conn.)
- 84.75% denatured isopropanol
- The ingredients are mixed in a high shear mixer for complete dispersion.
- The coatings are applied to the wiper blades by any liquid coating application technique, such as dipping, spraying, flow coating, or brushing. The coating material tends to run away from the scraping edge of the blade which forms a right angle corner. It coats the flat surface of both sides of the scraping edge. Most of the optical photoconductor surface wear takes place 1.5 mm-3 mm past the scraping edge, and this is the area where the coating is most useful. The coating may be air dried, or dried using heat to accelerate the evaporation of the water and/or solvent.
- There is thus provided a highly dispersed fluoropolymer resin with a binder resin that lubricates in a suitable liquid carrier such as a solvent, water, or combinations of solvent and water. In all of the above examples, the anti-blocking compound, or flow and slip compound is added to further reduce the friction between the optical photoconductor surface and that of the wiper blade. By placing the fluoropolymer resin in a binder resin, the life of the coating is significantly enhanced. Initial observations indicate that wear reduction of the optical photoconductor surface is as much as 60%, as compared with prior art lubricants.
- I wish it to be understood that I do not consider the invention to be limited to the precise details described in the disclosure, for obvious modifications will occur to those skilled in the art to which the invention pertains.
Claims (4)
1. A wear reducing lubricant for a wiper blade used to remove residual toner particles from a photoconductive surface of an electrophotographic device, said lubricant comprising: finely divided
a) a fluoropolymer
b) a binder resin forming a permanent coating carrying said fluoropolymer and
c) an evaporable liquid carrier forming means for applying said lubricant to said photoconductive surface
2. A lubricant in accordance with claim 1 , said fluoropolymer consisting of polytetrafluorethylene.
3. A lubricant in accordance with claim 1 , said binder resin comprising polyvinylpyrollidinone.
4. A lubricant in accordance with claim 1 , said liquid carrier being selected from the group consisting of alcohol, water, and mixtures of alcohol and water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/389,609 US20030207771A1 (en) | 2002-05-02 | 2003-03-17 | Cleaning blade lubricant |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US37693702P | 2002-05-02 | 2002-05-02 | |
US10/389,609 US20030207771A1 (en) | 2002-05-02 | 2003-03-17 | Cleaning blade lubricant |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030207771A1 true US20030207771A1 (en) | 2003-11-06 |
Family
ID=29273079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/389,609 Abandoned US20030207771A1 (en) | 2002-05-02 | 2003-03-17 | Cleaning blade lubricant |
Country Status (1)
Country | Link |
---|---|
US (1) | US20030207771A1 (en) |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4012551A (en) * | 1974-02-05 | 1977-03-15 | Warner-Lambert Company | Coated razor blade |
US4279500A (en) * | 1978-04-27 | 1981-07-21 | Canon Kabushiki Kaisha | Electrophotographic apparatus and an abrading means |
US4658756A (en) * | 1979-08-07 | 1987-04-21 | Canon Kabushiki Kaisha | Imaging holding member |
US4757349A (en) * | 1985-04-17 | 1988-07-12 | Kabushiki Kaisha Toshiba | Cleaning device and process for use in image forming apparatus |
US4970560A (en) * | 1988-12-22 | 1990-11-13 | Xerox Corporation | Lubricated metal cleaning blade for use in dry electrophotographic processes |
US5138395A (en) * | 1990-12-17 | 1992-08-11 | Xerox Corporation | Internally lubricated cleaning blade |
US5160790A (en) * | 1990-11-01 | 1992-11-03 | C. R. Bard, Inc. | Lubricious hydrogel coatings |
US5609082A (en) * | 1993-03-25 | 1997-03-11 | Gerber Garment Technology, Inc. | Lubrication aid for treating cutting blade and sharpener |
US5997772A (en) * | 1997-04-22 | 1999-12-07 | Lester Cornelius | Conductive coating for charging blade in electrostatic printing processes |
US6077592A (en) * | 1996-09-20 | 2000-06-20 | Ntn Corporation | Wiper blade |
US6455476B1 (en) * | 1998-06-09 | 2002-09-24 | Henkel Corporation | Composition and process for lubricated plastic working of metals |
US6521386B1 (en) * | 1999-02-16 | 2003-02-18 | Ricoh Company Ltd. | Electrophotographic photoreceptor and electrophotographic image forming method and apparatus using the photoreceptor |
-
2003
- 2003-03-17 US US10/389,609 patent/US20030207771A1/en not_active Abandoned
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4012551A (en) * | 1974-02-05 | 1977-03-15 | Warner-Lambert Company | Coated razor blade |
US4279500A (en) * | 1978-04-27 | 1981-07-21 | Canon Kabushiki Kaisha | Electrophotographic apparatus and an abrading means |
US4658756A (en) * | 1979-08-07 | 1987-04-21 | Canon Kabushiki Kaisha | Imaging holding member |
US4757349A (en) * | 1985-04-17 | 1988-07-12 | Kabushiki Kaisha Toshiba | Cleaning device and process for use in image forming apparatus |
US4970560A (en) * | 1988-12-22 | 1990-11-13 | Xerox Corporation | Lubricated metal cleaning blade for use in dry electrophotographic processes |
US5160790A (en) * | 1990-11-01 | 1992-11-03 | C. R. Bard, Inc. | Lubricious hydrogel coatings |
US5138395A (en) * | 1990-12-17 | 1992-08-11 | Xerox Corporation | Internally lubricated cleaning blade |
US5609082A (en) * | 1993-03-25 | 1997-03-11 | Gerber Garment Technology, Inc. | Lubrication aid for treating cutting blade and sharpener |
US6077592A (en) * | 1996-09-20 | 2000-06-20 | Ntn Corporation | Wiper blade |
US5997772A (en) * | 1997-04-22 | 1999-12-07 | Lester Cornelius | Conductive coating for charging blade in electrostatic printing processes |
US6253052B1 (en) * | 1997-04-22 | 2001-06-26 | Lester Cornelius | Conductive coating for charging blade in electrostatic printing processes |
US6455476B1 (en) * | 1998-06-09 | 2002-09-24 | Henkel Corporation | Composition and process for lubricated plastic working of metals |
US6521386B1 (en) * | 1999-02-16 | 2003-02-18 | Ricoh Company Ltd. | Electrophotographic photoreceptor and electrophotographic image forming method and apparatus using the photoreceptor |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |