JPS5555432A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5555432A
JPS5555432A JP12814978A JP12814978A JPS5555432A JP S5555432 A JPS5555432 A JP S5555432A JP 12814978 A JP12814978 A JP 12814978A JP 12814978 A JP12814978 A JP 12814978A JP S5555432 A JPS5555432 A JP S5555432A
Authority
JP
Japan
Prior art keywords
magnetic layer
support material
carbon black
layer
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.)
Granted
Application number
JP12814978A
Other languages
Japanese (ja)
Other versions
JPH0115930B2 (en
Inventor
Hiroshi Zaitsu
Takezo Shimizu
Osamu Saito
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 JP12814978A priority Critical patent/JPS5555432A/en
Priority to US06/085,585 priority patent/US4275113A/en
Publication of JPS5555432A publication Critical patent/JPS5555432A/en
Publication of JPH0115930B2 publication Critical patent/JPH0115930B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To lower the surface electric resistance of a magnetic layer without damaging an electromagnetic conversion characteristic by providing a nonmagnetic layer, which includes a specific carbon of 5W30wt%, between a support material and the magnetic layer.
CONSTITUTION: On a support material such as a polyester film, a carbon black of a surface area over 700m2/g and an oil absorption quantity over 300ml(DBP)/ 100g is mixed and dispersed in cyclohexane, etc., together with thermoplastic urethane, which becomes a binder, so that the content of the carbon black in a non-magnetic layer may be 5W30wt%, thereby producing a paint. This paint is applied to the film above and is dried to form the non-magnetic layer. Next, a magnetic layer is formed on this layer. Since this carbon black has good conductivity and the used quantity is small, it has a small surface resistance as a magnetic recording medium, and consequently, it is difficult to charge, and output fluctuation is prevented, and further, a strong adhesion between the support material and the magnetic layer can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP12814978A 1978-10-17 1978-10-17 Magnetic recording medium Granted JPS5555432A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP12814978A JPS5555432A (en) 1978-10-17 1978-10-17 Magnetic recording medium
US06/085,585 US4275113A (en) 1978-10-17 1979-10-17 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12814978A JPS5555432A (en) 1978-10-17 1978-10-17 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS5555432A true JPS5555432A (en) 1980-04-23
JPH0115930B2 JPH0115930B2 (en) 1989-03-22

Family

ID=14977590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12814978A Granted JPS5555432A (en) 1978-10-17 1978-10-17 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5555432A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928227A (en) * 1982-08-09 1984-02-14 Victor Co Of Japan Ltd Magnetic recording medium
JPS60125926A (en) * 1983-12-13 1985-07-05 Toshiba Corp Magnetic recording medium
JPS60125927A (en) * 1983-12-13 1985-07-05 Toshiba Corp Magnetic recording medium
JPS62108053A (en) * 1985-11-07 1987-05-19 帝人株式会社 Laminated polyester film

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5604013A (en) * 1994-06-10 1997-02-18 Mitsubishi Chemical Corporation Magnetic recording medium and recording/reproducing method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928227A (en) * 1982-08-09 1984-02-14 Victor Co Of Japan Ltd Magnetic recording medium
JPH0332127B2 (en) * 1982-08-09 1991-05-10 Victor Company Of Japan
JPS60125926A (en) * 1983-12-13 1985-07-05 Toshiba Corp Magnetic recording medium
JPS60125927A (en) * 1983-12-13 1985-07-05 Toshiba Corp Magnetic recording medium
JPS62108053A (en) * 1985-11-07 1987-05-19 帝人株式会社 Laminated polyester film
JPH0367621B2 (en) * 1985-11-07 1991-10-23 Teijin Ltd

Also Published As

Publication number Publication date
JPH0115930B2 (en) 1989-03-22

Similar Documents

Publication Publication Date Title
JPS5675659A (en) Carrier material
JPS5555438A (en) Magnetic recording medium
JPS5711349A (en) Electrostatic recorder
JPS5555432A (en) Magnetic recording medium
JPS5555431A (en) Magnetic recording medium
JPS5538671A (en) Magnetic recording medium
JPS5553592A (en) Recording material
JPS5315802A (en) High density magnetic recording material
JPS5555434A (en) Magnetic recording medium
JPS5613519A (en) Magnetic recording medium
JPS5555433A (en) Magnetic recording medium
JPS55125538A (en) Magnetic recording medium
JPS5555436A (en) Magnetic recording medium
JPS5496034A (en) Electrophotographic toner
JPS5483896A (en) Humidity detecting element using thin film
JPS5315803A (en) Magnetic recording material
JPS5555437A (en) Magnetic recording medium
JPS5613522A (en) Magnetic recording medium
JPS5517853A (en) Magnetresistance effect head
JPS5528506A (en) Magnetic recording medium
JPS5619526A (en) Magnetic disc
JPS5595594A (en) Conductive recording material
JPS5621135A (en) Magnetic powder toner
JPS5274355A (en) Electrosensitive recorder
JPS57212620A (en) Magnetic recording medium