JPS5778630A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5778630A
JPS5778630A JP55152614A JP15261480A JPS5778630A JP S5778630 A JPS5778630 A JP S5778630A JP 55152614 A JP55152614 A JP 55152614A JP 15261480 A JP15261480 A JP 15261480A JP S5778630 A JPS5778630 A JP S5778630A
Authority
JP
Japan
Prior art keywords
magnetic
elasticity
modulus
width direction
recording medium
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
JP55152614A
Other languages
Japanese (ja)
Inventor
Takeshi Matsuura
Seiji Wataya
Akira Morioka
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP55152614A priority Critical patent/JPS5778630A/en
Publication of JPS5778630A publication Critical patent/JPS5778630A/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
    • G11B5/845—Coating a support with a liquid magnetic dispersion in a magnetic field

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To improve mechanical strength, by constituting a magnetic layer of magnetic powder, of two layers, and also setting the relation between a modulus of elasticity in the tape length direction of each layer and a modulus of elasticity in the width direction, to a spacific tatio. CONSTITUTION:A magnetic painting material containing 60-90wt% magnetic powder in a binding material is applied and dried on a base film while providing an oriented magnetic field in the tape width direction, and a lower magnetic layer whose modulus of elasticity in the length direction is >=2.5 times the modulus of elasticity in the width direction is formed. Subsequently, the same magnetic painting material is applied and dried on the lower magnetic layer while providing the oriented magnetic field, an upper magnetic layer whose modulus of elasticity in the length direction is >=2.5 times the modulus of elasticity in the width direction is formed, and a magnetic recording medium whose full thickness is <=17mu is obtained. After that, it is placed on a flat plate 1, the height (h) of a tape 2 from the surface of the flat plate is measured, the extent of curling and the video sensitivity of the magnetic recording medium is measured, and consequently, the mechanical strength is improved without lowering the magnetic characteristic.
JP55152614A 1980-10-29 1980-10-29 Magnetic recording medium Pending JPS5778630A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55152614A JPS5778630A (en) 1980-10-29 1980-10-29 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55152614A JPS5778630A (en) 1980-10-29 1980-10-29 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5778630A true JPS5778630A (en) 1982-05-17

Family

ID=15544229

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55152614A Pending JPS5778630A (en) 1980-10-29 1980-10-29 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5778630A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04119518A (en) * 1990-09-10 1992-04-21 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPH0562151A (en) * 1991-09-02 1993-03-12 Matsushita Electric Ind Co Ltd Tape-shaped magnetic recording medium
US6284361B1 (en) 1997-11-14 2001-09-04 Fuji Photo Film Co., Ltd. Magnetic recording medium and process for producing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04119518A (en) * 1990-09-10 1992-04-21 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPH0562151A (en) * 1991-09-02 1993-03-12 Matsushita Electric Ind Co Ltd Tape-shaped magnetic recording medium
US6284361B1 (en) 1997-11-14 2001-09-04 Fuji Photo Film Co., Ltd. Magnetic recording medium and process for producing the same

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