JPS55113056A - Magnetic toner for developing electrostatic image - Google Patents

Magnetic toner for developing electrostatic image

Info

Publication number
JPS55113056A
JPS55113056A JP2032179A JP2032179A JPS55113056A JP S55113056 A JPS55113056 A JP S55113056A JP 2032179 A JP2032179 A JP 2032179A JP 2032179 A JP2032179 A JP 2032179A JP S55113056 A JPS55113056 A JP S55113056A
Authority
JP
Japan
Prior art keywords
toner
magnetic material
electrostatic image
magnetic toner
resin
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.)
Granted
Application number
JP2032179A
Other languages
Japanese (ja)
Other versions
JPS6144309B2 (en
Inventor
Kenji Tsujita
Fumio Koizumi
Masahiko Matsunawa
Makoto Tomono
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP2032179A priority Critical patent/JPS55113056A/en
Publication of JPS55113056A publication Critical patent/JPS55113056A/en
Publication of JPS6144309B2 publication Critical patent/JPS6144309B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE: To obtain a toner for developing an electrostatic image superior in charge retentivity characteristics even under a high humidity atmosphere, by incorporating a specified magnetic material with a resin.
CONSTITUTION: A magnetic material, such as ferrite or magnetite having a moisture content of 0.15wt% at a temperature of 20°C and a relative humidity of 60% and a mean particle diamether of 0.1W1.5μ is incorporated with a thermoplastic resin (preferably a vinyl type resin having a weight average molecular weight of about 1000W500 thousand and a glass transition temperature of about 20°C or higher) to form a toner. It is desirable that the content of magnetic material in the above toner is 20W70wt% and the particle diameter of the toner is 1W50μ.
COPYRIGHT: (C)1980,JPO&Japio
JP2032179A 1979-02-23 1979-02-23 Magnetic toner for developing electrostatic image Granted JPS55113056A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2032179A JPS55113056A (en) 1979-02-23 1979-02-23 Magnetic toner for developing electrostatic image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2032179A JPS55113056A (en) 1979-02-23 1979-02-23 Magnetic toner for developing electrostatic image

Publications (2)

Publication Number Publication Date
JPS55113056A true JPS55113056A (en) 1980-09-01
JPS6144309B2 JPS6144309B2 (en) 1986-10-02

Family

ID=12023856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2032179A Granted JPS55113056A (en) 1979-02-23 1979-02-23 Magnetic toner for developing electrostatic image

Country Status (1)

Country Link
JP (1) JPS55113056A (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045639A (en) * 1973-08-27 1975-04-23
JPS5092137A (en) * 1973-12-14 1975-07-23
JPS50117432A (en) * 1974-02-16 1975-09-13
JPS533237A (en) * 1976-06-29 1978-01-12 Ricoh Co Ltd One component type developing toner
US4097620A (en) * 1977-05-02 1978-06-27 Xerox Corporation Magnetic toner particle coating process
JPS5381125A (en) * 1976-12-27 1978-07-18 Ricoh Co Ltd Electrophotographic magnetic toner
JPS53118057A (en) * 1977-03-25 1978-10-16 Hitachi Metals Ltd Magnetic toner
DE2832583A1 (en) * 1977-07-27 1979-02-08 Minolta Camera Kk DRY DEVELOPMENT PROCESS FOR ELECTROPHOTOGRAPHY AND DEVELOPMENT MATERIAL FOR IT
JPS5445135A (en) * 1977-09-16 1979-04-10 Minolta Camera Co Ltd Dry type developer for electrography
JPS55105253A (en) * 1979-02-07 1980-08-12 Mita Ind Co Ltd Magnetic developer and its preparation

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045639A (en) * 1973-08-27 1975-04-23
JPS5092137A (en) * 1973-12-14 1975-07-23
JPS50117432A (en) * 1974-02-16 1975-09-13
JPS533237A (en) * 1976-06-29 1978-01-12 Ricoh Co Ltd One component type developing toner
JPS5381125A (en) * 1976-12-27 1978-07-18 Ricoh Co Ltd Electrophotographic magnetic toner
JPS53118057A (en) * 1977-03-25 1978-10-16 Hitachi Metals Ltd Magnetic toner
US4097620A (en) * 1977-05-02 1978-06-27 Xerox Corporation Magnetic toner particle coating process
DE2832583A1 (en) * 1977-07-27 1979-02-08 Minolta Camera Kk DRY DEVELOPMENT PROCESS FOR ELECTROPHOTOGRAPHY AND DEVELOPMENT MATERIAL FOR IT
JPS5424632A (en) * 1977-07-27 1979-02-24 Minolta Camera Co Ltd Dry developing method in electrophotography
US4254203A (en) * 1977-07-27 1981-03-03 Minolta Camera Kabushiki Kaisha Dry process developing method employing magnetic toner
JPS5445135A (en) * 1977-09-16 1979-04-10 Minolta Camera Co Ltd Dry type developer for electrography
JPS55105253A (en) * 1979-02-07 1980-08-12 Mita Ind Co Ltd Magnetic developer and its preparation

Also Published As

Publication number Publication date
JPS6144309B2 (en) 1986-10-02

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