JPS54147812A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS54147812A
JPS54147812A JP5551278A JP5551278A JPS54147812A JP S54147812 A JPS54147812 A JP S54147812A JP 5551278 A JP5551278 A JP 5551278A JP 5551278 A JP5551278 A JP 5551278A JP S54147812 A JPS54147812 A JP S54147812A
Authority
JP
Japan
Prior art keywords
ferromagnetic powder
binder
active agent
powder
surface active
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
JP5551278A
Other languages
Japanese (ja)
Inventor
Masaharu Nishimatsu
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP5551278A priority Critical patent/JPS54147812A/en
Publication of JPS54147812A publication Critical patent/JPS54147812A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve the half-life of the charge quantity charged without giving influence to the strength among binders, avert the problem of deposition of the peeled powder on head and further improve orientation characteristics by using respectively specific binder and ferromagnetic powder.
CONSTITUTION: An aqueous solution of alkyl ether type surface active agent and ferromagnetic powder are mixed to let the surface active agent be adsorbed on the surface of the ferromagnetic powder, after which the mixture is heated to dry. The ferromagnetic powder having undergone charging preventive treatment in this way is kneaded in the binder rsing the vinyl chloride-vinyl acetate copolymer plasticized by polyurethane resins of 40 wt% or under based on the total weight of the binder and a solvent. The resultant magnetic coating is coated on a suitable substrate.
COPYRIGHT: (C)1979,JPO&Japio
JP5551278A 1978-05-12 1978-05-12 Magnetic recording medium Pending JPS54147812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5551278A JPS54147812A (en) 1978-05-12 1978-05-12 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5551278A JPS54147812A (en) 1978-05-12 1978-05-12 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS54147812A true JPS54147812A (en) 1979-11-19

Family

ID=13000733

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5551278A Pending JPS54147812A (en) 1978-05-12 1978-05-12 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS54147812A (en)

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