JPS5778549A - Developer for electrophotography - Google Patents

Developer for electrophotography

Info

Publication number
JPS5778549A
JPS5778549A JP55154938A JP15493880A JPS5778549A JP S5778549 A JPS5778549 A JP S5778549A JP 55154938 A JP55154938 A JP 55154938A JP 15493880 A JP15493880 A JP 15493880A JP S5778549 A JPS5778549 A JP S5778549A
Authority
JP
Japan
Prior art keywords
developer
silicic acid
5pts
powder
grain sizes
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.)
Pending
Application number
JP55154938A
Other languages
Japanese (ja)
Inventor
Masanori Takenouchi
Toru Matsumoto
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP55154938A priority Critical patent/JPS5778549A/en
Priority to DE19813142974 priority patent/DE3142974A1/en
Publication of JPS5778549A publication Critical patent/JPS5778549A/en
Priority to US06/518,317 priority patent/US4430409A/en
Pending legal-status Critical Current

Links

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To obtain a developer which is stable and uniform in the quantity of frictional electrostatic charging, is free from photographic fogs, and scattering and cohesion of the toner, increases the number of enduring copies and has a high transfer effect at high humidity by permitting fine silicic acid powder synthesized by a wet method to be contained. CONSTITUTION:The fine powder of the silicic acid which is synthesized by a wet method, and is of 6-11 pH dispersed at 4wt% in distilled water is contained in a developer. The fine powder of the silicic acid of 0.01-2mum average primary grain sizes is used, and the amt. of its application is preferably 0.01-20% base on the weight of the developer. For example, 100pts. polystyrene resin, 5pts. carbon black, and 5pts. methylene blue chloride are kneaded with hot rolls, after which the mixture is pulverized to 10-20mum average grain sizes. 1.0pt.wt. said fine silicic acid powder is added to this and is mixed with a Henschel mixer. 100pts. iron powder carrier of 50-80mum average grain sizes is added to 5pts. the mixture prepd. by this, and these are mixed, whereby the developer is obtained.
JP55154938A 1980-10-31 1980-11-04 Developer for electrophotography Pending JPS5778549A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP55154938A JPS5778549A (en) 1980-11-04 1980-11-04 Developer for electrophotography
DE19813142974 DE3142974A1 (en) 1980-10-31 1981-10-29 DEVELOPER FOR ELECTROPHOTOGRAPHIC PURPOSES AND DEVELOPMENT METHOD
US06/518,317 US4430409A (en) 1980-10-31 1983-07-29 Developer for electrophotography with wet process silicic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55154938A JPS5778549A (en) 1980-11-04 1980-11-04 Developer for electrophotography

Publications (1)

Publication Number Publication Date
JPS5778549A true JPS5778549A (en) 1982-05-17

Family

ID=15595210

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55154938A Pending JPS5778549A (en) 1980-10-31 1980-11-04 Developer for electrophotography

Country Status (1)

Country Link
JP (1) JPS5778549A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63266461A (en) * 1987-04-24 1988-11-02 Mita Ind Co Ltd Positive chargeable toner
JPH026985A (en) * 1988-06-24 1990-01-11 Konica Corp Electrophotographic image forming method
JPH0247672A (en) * 1988-08-09 1990-02-16 Konica Corp Electrophotographic image forming method
US7811540B2 (en) 2004-10-20 2010-10-12 Cabot Corporation Method of preparing hydrophobic silica directly from an aqueous colloidal silica dispersion
WO2015147208A1 (en) * 2014-03-27 2015-10-01 日本ゼオン株式会社 Toner for developing electrostatic charge image

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63266461A (en) * 1987-04-24 1988-11-02 Mita Ind Co Ltd Positive chargeable toner
JPH026985A (en) * 1988-06-24 1990-01-11 Konica Corp Electrophotographic image forming method
JPH0247672A (en) * 1988-08-09 1990-02-16 Konica Corp Electrophotographic image forming method
US7811540B2 (en) 2004-10-20 2010-10-12 Cabot Corporation Method of preparing hydrophobic silica directly from an aqueous colloidal silica dispersion
WO2015147208A1 (en) * 2014-03-27 2015-10-01 日本ゼオン株式会社 Toner for developing electrostatic charge image
CN106133612A (en) * 2014-03-27 2016-11-16 日本瑞翁株式会社 Electrostatic image developing toner
JPWO2015147208A1 (en) * 2014-03-27 2017-04-13 日本ゼオン株式会社 Toner for electrostatic image development
US10495993B2 (en) 2014-03-27 2019-12-03 Zeon Corporation Toner for developing electrostatic images

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