EP0655658A2 - Reibungsladung entwickelndes Element für positivaufladbare Toner - Google Patents

Reibungsladung entwickelndes Element für positivaufladbare Toner Download PDF

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Publication number
EP0655658A2
EP0655658A2 EP94105509A EP94105509A EP0655658A2 EP 0655658 A2 EP0655658 A2 EP 0655658A2 EP 94105509 A EP94105509 A EP 94105509A EP 94105509 A EP94105509 A EP 94105509A EP 0655658 A2 EP0655658 A2 EP 0655658A2
Authority
EP
European Patent Office
Prior art keywords
group
charge
toner
substituent
positively
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.)
Withdrawn
Application number
EP94105509A
Other languages
English (en)
French (fr)
Other versions
EP0655658A3 (de
Inventor
Osamu C/O Hodogaya Chem. Co. Ltd. Mukudai
C/O Hodogaya Chem. Co. Ltd. Matsuura Yuuji
Isao C/O Hodogaya Chem. Co. Ltd. Niimura
Kayoko C/O Hodogaya Chem. Co. Ltd. Watanabe
Keiko C/O Hodogaya Chem. Co. Ltd. Iwasa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hodogaya Chemical Co Ltd
Original Assignee
Hodogaya Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hodogaya Chemical Co Ltd filed Critical Hodogaya Chemical Co Ltd
Publication of EP0655658A2 publication Critical patent/EP0655658A2/de
Publication of EP0655658A3 publication Critical patent/EP0655658A3/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/10—Developers with toner particles characterised by carrier particles
    • G03G9/113—Developers with toner particles characterised by carrier particles having coatings applied thereto
    • G03G9/1138—Non-macromolecular organic components of coatings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0812—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer regulating means, e.g. structure of doctor blade
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0818—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the structure of the donor member, e.g. surface properties
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration
    • G03G15/0928—Details concerning the magnetic brush roller structure, e.g. magnet configuration relating to the shell, e.g. structure, composition

Definitions

  • the present invention relates to a carrier, conveyor member such as development sleeve and doctor blade and other friction charge-providing members for providing friction charge to a dry toner for use in the development of an electrostatic latent image in electrophotography, electrostatic recording, etc.
  • an electrostatic latent image is formed on an inorganic photoreceptor such as selenium, selenium alloy, cadmium sulfide and amorphous silicon or an organic photoreceptor comprising a charge-generating agent and a charge-transporting agent.
  • the electrostatic latent image thus formed is developed with a toner, transferred to a paper or plastic film, and then fixed to obtain a visible image.
  • Photoreceptors can be charged positively or negatively depending on their configuration. Photoreceptors which allow a printed area to be left as an electrostatic latent image are developed with an oppositely-chargeable toner while those which allow a printed area to be destaticized to effect reversal development are developed with a toner chargeable to the same sign as the printed area. In other words, if a negatively- chargeable photoreceptor is developed with an oppositely-chargeable toner and a positively-chargeable photoreceptor is subjected to reverse development, a positively-chargeable toner is used.
  • a toner comprises a binder resin, a colorant, and other additives.
  • the toner In order to have desirable friction chargeability (charging rate, charging level, charging stability, etc.), age stability and environmental stability, the toner normally comprises a charge-controlling agent incorporated therein.
  • Examples of the charge-controlling agent to be incorporated in the positively-chargeable toner include azinic dyes such as nigrosine, basic dyes such as triphenylmethane dyes, laked colors of basic dyes, metal complex dyes comprising quaternary ammonium residues incorporated in its skeletone, quaternary ammonium salts, laked compounds of quaternary ammonium salt, imidazole compounds, vinyl polymers containing an amino group(s), and condensed polymers containing an amino group(s).
  • azinic dyes such as nigrosine
  • basic dyes such as triphenylmethane dyes
  • laked colors of basic dyes include metal complex dyes comprising quaternary ammonium residues incorporated in its skeletone, quaternary ammonium salts, laked compounds of quaternary ammonium salt, imidazole compounds, vinyl polymers containing an amino group(s), and condensed polymers containing an amino group(s).
  • dry toners have varieties such as unitary, binary, magnetic and nonmagnetic toners depending on the development process.
  • Charge-controlling agents capable of providing satisfactory chargeability to these toners have been rarely found and put into practical use. Even charge-controlling agents which are possibly fit for practical use preferably appear somewhat on the surface of toner grains to fully exert its effects. This causes the charge-controlling agent to leave from the surface of the toner when the toner grains collide with each other or rub against the carrier or other members, contaminating the carrier or other members.
  • the toner be provided with chargeability by means of a carrier, conveyor members such as development sleeve and doctor blade or other friction charge-providing members rather than by means of a charge-controlling agent or other additives.
  • a carrier such as development sleeve and doctor blade or other friction charge-providing members
  • a charge-controlling agent or other additives there is no need to incorporate a charge-controlling agent or other additives in the toner.
  • a friction charge-providing member for positively-chargeable toner which can comprise a carrier, conveyor members such as development sleeve and doctor blade or other friction charge-providing members, exhibits a mechanically sufficient strength, can render these conveyor members or friction charge-providing members capable of providing friction charge, exhibits no deterioration of properties even after prolonged use, and can provide a toner with an excellent positive-chargeability.
  • the present invention concerns a friction charge-providing member for positively-chargeable toner comprising a parent material and a charge-controlling agent on the surface of the parent material, at least one selected from the group consisting of compounds represented by formula (I) or (II) being used as the charge-controlling agent: wherein A and B each independently represent a hydrogen atom, a halogen atom, an alkoxyl group, a carboxyl group, a hydroxyl group, an ester group, a nitro group, an amino group, an alkylamino group, an alkyl group which may contain a substituent(s), or a phenyl group which may contain a substituent(s); R represents a hydrogen atom, an alkyl group which may contain a substituent(s), a phenyl group which may contain a substituent(s), or a naphthyl group which may contain a substituent(s); m represents an integer 2 to 16; and n represents an integer 4 to 8.
  • Compounds represented by the general formula (I) or (II) may be used singly or in combination. These compounds may be used in combination with other charge-controlling agents or other additives. These compounds may be directly used in the form of solution or dispersion in a solvent or may be used in the form of dispersion in a resin.
  • a solvent include methanol, ethanol, buthanol, acetone, methylethylketone, tetrahydrofuran, toluene, xylene, and dimethylformamide.
  • Such a resin examples include silicone resin, fluorine resin, polyacrylic ester, polymethacrylic ester, polystyrene, polybutadiene, polyester, polyurethane, polyamide, epoxy resin, chlorinated paraffin, phenolic resin, polycarbonate, and copolymers thereof. These resins may be used singly or in admixture.
  • the coating solution obtained by dissolving or dispersing a charge-controlling agent represented by the foregoing general formula (I) or (II) may be coated on the parent material of a friction charge-providing member (e.g., a carrier, and conveyor members such as development sleeve and doctor blade) by dip coating process, spray coating process, brush coating process or the like, and then dried to obtain a friction charge-providing member for positively-chargeable toner according to the present invention.
  • a resin comprising a compound represented by the foregoing general formula (I) or (II) dispersed therein may be formed into a friction charge-providing member such as doctor blade for positively-chargeable toner according to the present invention.
  • the coated amount of the charge-controlling agent is preferably from 0.1 to 100 mg per square meter of the parent material of a friction charge-providing member.
  • the amount of the charge-controlling agent contained in the resin to be formed into a friction charge-providing member is preferably from 0.1 to 60 % by weight.
  • parent material of carrier there can be used a particulate metal such as iron and aluminum, particulate alloy, particulate metallic compound such as particulate metal oxide, particulate glass, particulate ceramic or the like. Any known carriers may be used.
  • parent material of sleeve or doctor blade there can be used a metal, alloy or a nonmetallic substance such as plastic and rubber. Any sleeves or doctor blades which have heretofore been used can be used.
  • the carrier coated with the charge-controlling agent according to the present invention can be preferably used by being mixed with a toner so that the mixing ratio by weight of the carrier to the toner is from 2/98 to 10/90.
  • the positively-chargeable toner to be used in combination with the charge-providing member according to the present invention there can be used one which has heretofore been used as an electrophotographic toner.
  • a positively-chargeable toner is a fine powder comprising carbon black or a colorant such as dye and pigment in a binder resin.
  • the toner may contain a magnetic powder.
  • the toner may comprise an additive for improving the properties thereof, an external processing agent or the like incorporated therein.
  • the toner may contain a small amount (0.01 to 5 % by weight) of a positively-chargeable charge-controlling agent.
  • the alkoxyl group of A or B is preferably an alkoxyl group having 1 to 12 carbon atoms
  • the ester group of A or B is preferably an ester group represented by -COOX wherein X is an alkyl group having 1 to 12 carbon atoms or a phenyl group which may contain a substituent(s) (such as an alkyl group having 1 to 12 carbon atoms, an acetyl group, an amino group, a nitro group, a hydroxyl group, a halogen atom, an alkoxyl group having 1 to 8 carbon atoms, an acethylamino group, or an alkylamino group), the alkylamino group of A or B is preferably an alkylamino group having 1 to 8 carbon atoms, and the alkyl group which may contain a substituent(s) of A or B is preferably an alkyl group having 1 to 12 carbon atoms which may contain a substituent(s).
  • Examples of the substituent for the alkyl group of A or B include a phenyl group, an acetyl group, an amino group, a nitro group, a hydroxyl group, a halogen atom, and an alkoxyl group having 1 to 8 carbon atoms.
  • Examples of the substituent for the phenyl group of A or B include an alkyl group having 1 to 12 carbon atoms, an acetyl group, an amino group, a nitro group, a hydroxyl group, a halogen atom, an alkoxyl group having 1 to 8 carbon atoms, and an acethylamino group.
  • the alkyl group which may contain a substituent(s) of R is preferably an alkyl group having 1 to 16 carbon atoms which may contain a substituent(s).
  • Examples of the substituent for the alkyl group of R include an alkoxyl group having 1 to 8 carbon atoms, a hydroxyl group, a residue of a heterocyclic group having a nitogen atom or an oxygen atom, and a halogen atom.
  • Examples of the substituent for the phenyl group of R include an alkoxyl group having 1 to 8 carbon atoms, an alkyl group having 1 to 8 carbon atoms, an acetyl group, a hydroxyl group, a carboxyl group, a nitro group, an alkylamino group having having 1 to 8 carbon atoms, an amino group, and a halogen atom.
  • Examples of the substituent for the naphthyl group of R include a hydroxyl group, a carboxyl group, a nitro group, an alkyl group having 1 to 8 carbon atoms, a carbamoyl group, and a halogen atom.
  • Examples of the compound represented by the foregoing general formula (I) or (II) according to the present invention include the following compounds:
  • Example 2 To 97 parts of the carrier thus obtained were added 3 parts of the same toner as used in Example 1. The mixture was then stirred in a ball mill to obtain a developer. The toner was measured for charge by means of a blow-off powder charge meter. The result was 19 uc/g. With this developer charged in a remodelled commercial duplicating machine, an image was duplicated. As a result, a sharp image was obtained at the initial stage as well as after duplicating 10,000 sheets.
  • a developer was prepared in the same manner as in Example 1 except that Spilon Blue 2BNH (available from Hodogaya Chemical Co., Ltd.) as a copper phthalocyanine oil-soluble dye was used instead of carbon black.
  • the toner was measured for charge by means of a blow-off powder charge meter. The result was 24 ⁇ c/g. With this toner charged in a remodelled commercial duplicating machine, an image was duplicated. As a result, a sharp image could be obtained at the initial stage as well as after duplicating 10,000 sheets.
  • Example 2 With the same toner as prepared in Example 1 charged in the development zone shown in Fig. 1, an image was duplicated. As a result, a sharp image was obtained at the initial stage as well as after duplicating 10,000 sheets. The toner was measured for charge. The result was 17 ⁇ c/g.
  • the solution was then spray-coated on an elastic blade 2 (made of stainless steel) shown in Fig. 1.
  • the coated amount of Compound No.(8) was 4 mg/m 2.
  • the elastic blade 2 thus treated was then mounted on the development zone.
  • Example 7 With the same toner as prepared in Example 7 charged in the development zone shown in Fig. 1, an image was duplicated. As a result, a sharp image was obtained at the initial stage as well as after duplicating 10,000 sheets. The toner was measured for charge. The result was 15 ac/g.
  • Example 7 With the same toner as prepared in Example 7 charged in the development zone shown in Fig. 1, an image was duplicated. As a result, a sharp image was obtained at the initial stage as well as after duplicating 10,000 sheets. The toner was measured for charge. The result was 17 ⁇ c/g.
  • the friction charge-providing member according to the present invention can provide an image with the same quality as obtained at the initial stage even after continuous duplicating.
  • the friction charge-providing member according to the present invention causes no change in positive-chargeability and shows little environmental fluctuations, making it possible to obtain a sharp image even after continuous duplicating.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
EP94105509A 1993-11-01 1994-04-08 Reibungsladung entwickelndes Element für positivaufladbare Toner. Withdrawn EP0655658A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP293798/93 1993-11-01
JP5293798A JPH07128916A (ja) 1993-11-01 1993-11-01 正帯電性トナー用摩擦帯電付与部材

Publications (2)

Publication Number Publication Date
EP0655658A2 true EP0655658A2 (de) 1995-05-31
EP0655658A3 EP0655658A3 (de) 1996-07-03

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ID=17799298

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EP94105509A Withdrawn EP0655658A3 (de) 1993-11-01 1994-04-08 Reibungsladung entwickelndes Element für positivaufladbare Toner.

Country Status (3)

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EP (1) EP0655658A3 (de)
JP (1) JPH07128916A (de)
KR (1) KR950014999A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0747782A2 (de) * 1995-05-31 1996-12-11 Canon Kabushiki Kaisha Elastische Schneide um Entwicklerzufuhr zu Steuern, und diese benutzendes Entwicklungsgerät

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3563916B2 (ja) * 1996-04-26 2004-09-08 キヤノン株式会社 電子写真感光体、この電子写真感光体を用いた電子写真装置及びプロセスカートリッジ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61138260A (ja) * 1984-12-11 1986-06-25 Canon Inc 静電荷像現像用帯電付与部材
EP0385580A1 (de) * 1989-01-30 1990-09-05 Orient Chemical Industries, Ltd. Toner für die Entwicklung elektrostatischer latenter Bilder
EP0514867A1 (de) * 1991-05-23 1992-11-25 Orient Chemical Industries, Ltd. Ladungskontrollmittel und Toner zur Entwicklung elektrostatischer Bilder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05119534A (ja) * 1991-10-24 1993-05-18 Minolta Camera Co Ltd 電荷付与材

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61138260A (ja) * 1984-12-11 1986-06-25 Canon Inc 静電荷像現像用帯電付与部材
EP0385580A1 (de) * 1989-01-30 1990-09-05 Orient Chemical Industries, Ltd. Toner für die Entwicklung elektrostatischer latenter Bilder
EP0514867A1 (de) * 1991-05-23 1992-11-25 Orient Chemical Industries, Ltd. Ladungskontrollmittel und Toner zur Entwicklung elektrostatischer Bilder

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch, Week 9324 Derwent Publications Ltd., London, GB; Class A89, AN 93-192374 XP002001718 & JP-A-05 119 534 (MINOLTA CAMERA KK) , 18 May 1993 *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 334 (P-515), 13 November 1986 & JP-A-61 138260 (CANON INC), 25 June 1986, *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0747782A2 (de) * 1995-05-31 1996-12-11 Canon Kabushiki Kaisha Elastische Schneide um Entwicklerzufuhr zu Steuern, und diese benutzendes Entwicklungsgerät
EP0747782A3 (de) * 1995-05-31 2000-11-15 Canon Kabushiki Kaisha Elastische Schneide um Entwicklerzufuhr zu Steuern, und diese benutzendes Entwicklungsgerät

Also Published As

Publication number Publication date
JPH07128916A (ja) 1995-05-19
EP0655658A3 (de) 1996-07-03
KR950014999A (ko) 1995-06-16

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