JPS6484432A - Magnetic disk - Google Patents

Magnetic disk

Info

Publication number
JPS6484432A
JPS6484432A JP24041387A JP24041387A JPS6484432A JP S6484432 A JPS6484432 A JP S6484432A JP 24041387 A JP24041387 A JP 24041387A JP 24041387 A JP24041387 A JP 24041387A JP S6484432 A JPS6484432 A JP S6484432A
Authority
JP
Japan
Prior art keywords
fatty acid
surface area
specific surface
magnetic
carbon black
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
JP24041387A
Other languages
Japanese (ja)
Inventor
Katsuyuki Takeda
Isamu Michihashi
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 JP24041387A priority Critical patent/JPS6484432A/en
Publication of JPS6484432A publication Critical patent/JPS6484432A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To improve electromagnetic conversion characteristics and traveling durability by dispersing magnetic powder having a specific surface area, carbon black having a specific surface area and oil absorption, polishing agent having specific hardness and particle size and lubricating agent contg. specific fatty acid and fatty acid ester into a magnetic layer. CONSTITUTION:The magnetic layer formed by dispersing the magnetic powder, the carbon black, the polishing agent and the lubricating agent into a resin binder is formed on the surface of a magnetic disk. Ferromagnetic metal powder having >=40m<2>/g specific surface area is used for this magnetic powder. The carbon black which has 15-80m<2>/g specific surface area and has the oil absorption in a 110-200ml/(100g) range in DBP value is used. Furthermore, the polishing agent having >= 6 Mohs' hardness and <=1mum average particle size is used. The lubricating agent contg. the fatty acid of >=12C and the fatty acid ester derived from said fatty acid and the branched alcohol of 3-18C is used. The magnetic disk having the high electromagnetic conversion characteristics and traveling durability is thus obtd.
JP24041387A 1987-09-25 1987-09-25 Magnetic disk Pending JPS6484432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24041387A JPS6484432A (en) 1987-09-25 1987-09-25 Magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24041387A JPS6484432A (en) 1987-09-25 1987-09-25 Magnetic disk

Publications (1)

Publication Number Publication Date
JPS6484432A true JPS6484432A (en) 1989-03-29

Family

ID=17059102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24041387A Pending JPS6484432A (en) 1987-09-25 1987-09-25 Magnetic disk

Country Status (1)

Country Link
JP (1) JPS6484432A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02189712A (en) * 1989-01-18 1990-07-25 Kao Corp Magnetic recording medium
WO2001001402A1 (en) * 1999-06-28 2001-01-04 Teijin Limited Magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02189712A (en) * 1989-01-18 1990-07-25 Kao Corp Magnetic recording medium
WO2001001402A1 (en) * 1999-06-28 2001-01-04 Teijin Limited Magnetic recording medium

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