JPS57208635A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57208635A
JPS57208635A JP56094011A JP9401181A JPS57208635A JP S57208635 A JPS57208635 A JP S57208635A JP 56094011 A JP56094011 A JP 56094011A JP 9401181 A JP9401181 A JP 9401181A JP S57208635 A JPS57208635 A JP S57208635A
Authority
JP
Japan
Prior art keywords
back layer
magnetic recording
layer
recording medium
dispersing
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
JP56094011A
Other languages
Japanese (ja)
Inventor
Yoshio Kawakami
Norifumi Kajimoto
Masahiro Takizawa
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 JP56094011A priority Critical patent/JPS57208635A/en
Publication of JPS57208635A publication Critical patent/JPS57208635A/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
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/735—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer
    • G11B5/7356—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer comprising non-magnetic particles in the back layer, e.g. particles of TiO2, ZnO or SiO2

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To improve a cinching phenomenon, the wear of a back layer, the adhesion between a magnetic layer and the back layer, etc., by obtaining the back layer of a magnetic recording medium (tape) by dispersing the nonmagnetic powder into a specific binder. CONSTITUTION:A composition for a back layer is obtained by dispersing (D) nonmagnetic powder (such as CaCO3, carbon black, etc.) into a binder containing (A) 10-80wt% polyvinyl chloride-polyvinyl acetate copolymer, (B) about 90- 20wt% polyurethane and (C) 5-80wt% isocyanate compound per 100wt% total resin quantity. This composition is coated on the rear surface of a supporter (such as polyethylene terephthalate film) having a magnetic recording layer on the upper surface. Thus a back layer is obtained.
JP56094011A 1981-06-19 1981-06-19 Magnetic recording medium Pending JPS57208635A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56094011A JPS57208635A (en) 1981-06-19 1981-06-19 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56094011A JPS57208635A (en) 1981-06-19 1981-06-19 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57208635A true JPS57208635A (en) 1982-12-21

Family

ID=14098517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56094011A Pending JPS57208635A (en) 1981-06-19 1981-06-19 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57208635A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018816A (en) * 1983-07-11 1985-01-30 Sony Corp Magnetic recording medium
JPS6028024A (en) * 1983-07-26 1985-02-13 Tdk Corp Magnetic recording medium
JPS6032122A (en) * 1983-07-30 1985-02-19 Hitachi Maxell Ltd Magnetic recording medium
JPS6045937A (en) * 1983-08-22 1985-03-12 Tdk Corp Magnetic recording medium
JPS6045939A (en) * 1983-08-23 1985-03-12 Tdk Corp Magnetic recording medium
JPS6045938A (en) * 1983-08-23 1985-03-12 Tdk Corp Magnetic recording medium
JPS6080124A (en) * 1983-10-07 1985-05-08 Fuji Photo Film Co Ltd Magnetic recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4911305A (en) * 1972-05-31 1974-01-31

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4911305A (en) * 1972-05-31 1974-01-31

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018816A (en) * 1983-07-11 1985-01-30 Sony Corp Magnetic recording medium
JPS6028024A (en) * 1983-07-26 1985-02-13 Tdk Corp Magnetic recording medium
JPS6032122A (en) * 1983-07-30 1985-02-19 Hitachi Maxell Ltd Magnetic recording medium
JPH0568007B2 (en) * 1983-07-30 1993-09-28 Hitachi Maxell
JPS6045937A (en) * 1983-08-22 1985-03-12 Tdk Corp Magnetic recording medium
JPS6045939A (en) * 1983-08-23 1985-03-12 Tdk Corp Magnetic recording medium
JPS6045938A (en) * 1983-08-23 1985-03-12 Tdk Corp Magnetic recording medium
JPH0533447B2 (en) * 1983-08-23 1993-05-19 Tdk Electronics Co Ltd
JPS6080124A (en) * 1983-10-07 1985-05-08 Fuji Photo Film Co Ltd Magnetic recording medium

Similar Documents

Publication Publication Date Title
JPS57208637A (en) Magnetic recording medium
JPS5744223A (en) Magnetic recording medium
JPS5758227A (en) Magnetic recording medium
JPS54143608A (en) Magnetic recording medium
GB1490236A (en) Magnetic material
JPS57133521A (en) Magnetic recording medium
JPS5677927A (en) Magnetic recording medium
JPS567233A (en) Magnetic recording medium
JPS57208636A (en) Magnetic recording medium
JPS57208635A (en) Magnetic recording medium
JPS5377603A (en) Magnetic recording medium
JPS57176533A (en) Magnetic recording medium
JPS57183628A (en) Magnetic recording medium
JPS5629839A (en) Magnetic recording medium
JPS5724026A (en) Magnetic recording medium
JPS5750327A (en) Magnetic recording medium
JPS54119904A (en) Magnetic recording medium
JPS5528507A (en) Magnetic recording tape
JPS57111828A (en) Magnetic recording medium
JPS5613522A (en) Magnetic recording medium
JPS57158025A (en) Magnetic recording medium
JPS57152540A (en) Magnetic recording medium
JPS56101650A (en) Magnetic recording medium
JPS5634145A (en) Magnetic recording medium
JPS56119932A (en) Magnetic recording medium