JPS55583A - Insulation type magnetic toner - Google Patents

Insulation type magnetic toner

Info

Publication number
JPS55583A
JPS55583A JP5314679A JP5314679A JPS55583A JP S55583 A JPS55583 A JP S55583A JP 5314679 A JP5314679 A JP 5314679A JP 5314679 A JP5314679 A JP 5314679A JP S55583 A JPS55583 A JP S55583A
Authority
JP
Japan
Prior art keywords
toner
type magnetic
charge control
insulation type
magnetic toner
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
JP5314679A
Other languages
Japanese (ja)
Inventor
Jun Kanbara
Yuzo Omuro
Jinichi Kamogawa
Masaru Nakamura
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 JP5314679A priority Critical patent/JPS55583A/en
Publication of JPS55583A publication Critical patent/JPS55583A/en
Pending legal-status Critical Current

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  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE: To obtain the insulation type magnetic toner of not requiring any carrier capable of forming the transfer images of high densities having good continuous gradiations by grinding and granulating the thermoplastic resins, ferromagnetic materials, charge control agents, etc. having been blended at the specific ratios without using any solvent.
CONSTITUTION: Thermoplastic resin (A) such as vinyl-base resin of glass transition point about 20°C or higher and weight-average molecular weight about 1000 to 500,000, fine particulate ferromagnetic material (ferrite, iron, cobalt, etc.) (b) of mean particle size about 0.1 to 1μ (preferably 0.3 to 0.8μ), charge control agent (c) such as fettschwarz HBN (color index No. 26150), phthalocyanine blue, etc. are premixed within about 24 hours, after which the mixture is heated and kneaded for about 20 to 60 minutes at about 60 to 120°C by using an extruder. After this is cooled and hardened, it is ground, whereby the toner is obtained. The abovementioned blending ratios are made about 20 to 70pts.wt. of the composition b and about 0.1 to 10pts.wt. of the component c based on 100 pts.wt. of the toner.
COPYRIGHT: (C)1980,JPO&Japio
JP5314679A 1979-04-28 1979-04-28 Insulation type magnetic toner Pending JPS55583A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5314679A JPS55583A (en) 1979-04-28 1979-04-28 Insulation type magnetic toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5314679A JPS55583A (en) 1979-04-28 1979-04-28 Insulation type magnetic toner

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP11099573A Division JPS5330493B2 (en) 1973-10-04 1973-10-04

Publications (1)

Publication Number Publication Date
JPS55583A true JPS55583A (en) 1980-01-05

Family

ID=12934680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5314679A Pending JPS55583A (en) 1979-04-28 1979-04-28 Insulation type magnetic toner

Country Status (1)

Country Link
JP (1) JPS55583A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5813138A (en) * 1981-07-18 1983-01-25 Mazda Motor Corp Engine air-fuel ratio control device
DE3237381A1 (en) * 1981-12-24 1983-07-14 Mitsubishi Paper Mills, Ltd., Tokyo INK JET RECORDING SHEET
JPS60193725A (en) * 1984-03-15 1985-10-02 Nippon Denso Co Ltd Constant speed travelling apparatus
JPS6276031U (en) * 1985-10-31 1987-05-15
US4758490A (en) * 1984-11-13 1988-07-19 Sharp Kabushiki Kaisha Magnetic color toner for electrophotographic copying machine
JPS63199174A (en) * 1987-02-12 1988-08-17 株式会社日立製作所 Method and device for controlling pendulum car

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5813138A (en) * 1981-07-18 1983-01-25 Mazda Motor Corp Engine air-fuel ratio control device
JPS6254989B2 (en) * 1981-07-18 1987-11-17 Matsuda Kk
DE3237381A1 (en) * 1981-12-24 1983-07-14 Mitsubishi Paper Mills, Ltd., Tokyo INK JET RECORDING SHEET
DE3237381C2 (en) * 1981-12-24 1988-09-08 Mitsubishi Paper Mills, Ltd., Tokio/Tokyo, Jp
JPS60193725A (en) * 1984-03-15 1985-10-02 Nippon Denso Co Ltd Constant speed travelling apparatus
JPH0533175B2 (en) * 1984-03-15 1993-05-18 Nippon Denso Co
US4758490A (en) * 1984-11-13 1988-07-19 Sharp Kabushiki Kaisha Magnetic color toner for electrophotographic copying machine
JPS6276031U (en) * 1985-10-31 1987-05-15
JPS63199174A (en) * 1987-02-12 1988-08-17 株式会社日立製作所 Method and device for controlling pendulum car

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