JPS57212624A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57212624A
JPS57212624A JP56097879A JP9787981A JPS57212624A JP S57212624 A JPS57212624 A JP S57212624A JP 56097879 A JP56097879 A JP 56097879A JP 9787981 A JP9787981 A JP 9787981A JP S57212624 A JPS57212624 A JP S57212624A
Authority
JP
Japan
Prior art keywords
magnetic
rate
silicone oil
magnetic layer
squareness
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
JP56097879A
Other languages
Japanese (ja)
Inventor
Shizuo Furuyama
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56097879A priority Critical patent/JPS57212624A/en
Publication of JPS57212624A publication Critical patent/JPS57212624A/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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/71—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the lubricant

Abstract

PURPOSE:To improve the dispersibility of magnetic flux in a magnetic layer, and to improve a squareness rate and an orientation rate, by coating a nonmagnetic base with a magnetic paint which contains silicone oil which having an oleic acid in a molecule, and thus forming a magnetic layer. CONSTITUTION:On the basis of 100pts.wt. ferromagnetic metallic powder, 0.05- 1wt% silicone oil having an oleic acid in a molecule is added as a dispersant. This is dispersed uniformly in a polyurethane resin solution to obtain a magnetic paint, with which a polyester film is coated to obtain a magnetic recording film. Using this dispersant improves the squareness rate and orientation rate of the magnetic layer and the magnetic tape has superior surface smoothness to a magnetic tape which uses no silicone oil.
JP56097879A 1981-06-24 1981-06-24 Magnetic recording medium Pending JPS57212624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56097879A JPS57212624A (en) 1981-06-24 1981-06-24 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56097879A JPS57212624A (en) 1981-06-24 1981-06-24 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57212624A true JPS57212624A (en) 1982-12-27

Family

ID=14204029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56097879A Pending JPS57212624A (en) 1981-06-24 1981-06-24 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57212624A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5853931A (en) * 1996-05-22 1998-12-29 Nec Corporation Photoreceptor for electrophotography

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5853931A (en) * 1996-05-22 1998-12-29 Nec Corporation Photoreceptor for electrophotography

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