JPS57147134A - Manufacture for magnetic recording medium - Google Patents

Manufacture for magnetic recording medium

Info

Publication number
JPS57147134A
JPS57147134A JP3056981A JP3056981A JPS57147134A JP S57147134 A JPS57147134 A JP S57147134A JP 3056981 A JP3056981 A JP 3056981A JP 3056981 A JP3056981 A JP 3056981A JP S57147134 A JPS57147134 A JP S57147134A
Authority
JP
Japan
Prior art keywords
kneading
coupling agent
magnetic powder
aggregated
balls
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
JP3056981A
Other languages
Japanese (ja)
Inventor
Shoji Ishida
Mitsuru Hamada
Miyozou Maeda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3056981A priority Critical patent/JPS57147134A/en
Publication of JPS57147134A publication Critical patent/JPS57147134A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/842—Coating a support with a liquid magnetic dispersion

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To remove insoluble substance surely and to reduce a mixing time, by eliminating insoluble substance such as aggregated lump of magnetic powder and cracks of kneading balls with centrifugal separation from a paint obtained from kneading, after kneading the magnetic powder and a solution of coupling agent. CONSTITUTION:The solution of coupling agent consisting of magnetic powder such as gamma-Fe2O3 powder of about 0.5mum in particle diameter where aggregated lumps of >=10mum, coupling agent and solvent is kneaded by using aluminum balls, or polyethylene coated aluminum balls, and foregin materials such as aggregated lumps and ball cracked tips are removed by using a sharpless centrifugal separator, and the resultant is filtered by using a membrane filter to obtained a refinned magnetic paint.
JP3056981A 1981-03-05 1981-03-05 Manufacture for magnetic recording medium Pending JPS57147134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3056981A JPS57147134A (en) 1981-03-05 1981-03-05 Manufacture for magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3056981A JPS57147134A (en) 1981-03-05 1981-03-05 Manufacture for magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57147134A true JPS57147134A (en) 1982-09-10

Family

ID=12307463

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3056981A Pending JPS57147134A (en) 1981-03-05 1981-03-05 Manufacture for magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57147134A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5510140A (en) * 1993-12-01 1996-04-23 Tdk Corporation Method for preparing magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5510140A (en) * 1993-12-01 1996-04-23 Tdk Corporation Method for preparing magnetic recording medium

Similar Documents

Publication Publication Date Title
US2798838A (en) Method of preparing acetophenetidin tablets
DE3382510D1 (en) POLYMER GRANULES, METHOD FOR THE PRODUCTION AND USE THEREOF.
BE816577A (en) PROCESS FOR THE PREPARATION OF PIGMENTARY PARTICLES COATED WITH AN ORGANIC POLYMER AND COMPOSITIONS RESULTING FROM THEM
JPS5658135A (en) Magnetic recording medium
ES8101109A1 (en) Aqueous dispersions
CN115368122A (en) Modified diatomite porous ceramic slurry and ceramic powder
JPS57147134A (en) Manufacture for magnetic recording medium
JPS5525406A (en) Preparation of coating composition for magnetic recording disc
EP0807669A3 (en) Carbon black granulate
JPS54113641A (en) Rubber composition with high carbon black content and its preparation
GB1432383A (en) Method of producing a drying filter
JPS57159801A (en) Production of cellulose gel particle
JPS57130521A (en) Preparation of filter for use in metal casting
EP0122112A3 (en) Improvements in or relating to a process and apparatus for spraying a powder with liquid
JPS5755948A (en) Production of particulate vinyl chloride resin composition
JPS5522382A (en) Separator
JPS62230607A (en) Apatite hydroxide particle aggregate, production and use thereof as chromatographic filler
GB1451001A (en) Sink-float method of contacting liquids and solids
JPS54149758A (en) Heat-resistant resin paste composition
JPS62220590A (en) Production of granular fuel
JPS5781823A (en) Production of porous powder
JPS57159803A (en) Production of hydroxyethylcellulose particle
SU598949A1 (en) Method of preparing charge for pelletizing ore materials
JPS59169969A (en) Ceramic powder pretreatment
JPS56111129A (en) Magnetic recording medium