JPS54155011A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS54155011A
JPS54155011A JP6367778A JP6367778A JPS54155011A JP S54155011 A JPS54155011 A JP S54155011A JP 6367778 A JP6367778 A JP 6367778A JP 6367778 A JP6367778 A JP 6367778A JP S54155011 A JPS54155011 A JP S54155011A
Authority
JP
Japan
Prior art keywords
magnetic recording
thermal contraction
recording medium
contraction ratio
showing
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
JP6367778A
Other languages
Japanese (ja)
Inventor
Hisao Matsuura
Toshiaki Kunieda
Koichi Shinohara
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 JP6367778A priority Critical patent/JPS54155011A/en
Publication of JPS54155011A publication Critical patent/JPS54155011A/en
Pending legal-status Critical Current

Links

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)
  • Magnetic Record Carriers (AREA)
  • Thin Magnetic Films (AREA)

Abstract

PURPOSE: To keep the magnetic recording property of a magnetic recording medium good and prevent the medium from curling, by making a thin magnetic metal film on a plastic film whose thermal contraction ratio is prescribed both in the longitudinal direction and in the cross direction.
CONSTITUTION: The thin magnetic metal film is produced on the plastic film, whose thermal contraction ratio in the longitudinal direction is 2.0 to 7.5% under the treatment at a temperature of 150°C for 30 minutes as standardized in JIS C-2318 and is limited within the hatched area defined by the line A showing the five times of the thermal contraction ratio in the cross direction and the line B showing the one and a half times of the ratio in Fig.
COPYRIGHT: (C)1979,JPO&Japio
JP6367778A 1978-05-27 1978-05-27 Magnetic recording medium Pending JPS54155011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6367778A JPS54155011A (en) 1978-05-27 1978-05-27 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6367778A JPS54155011A (en) 1978-05-27 1978-05-27 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS54155011A true JPS54155011A (en) 1979-12-06

Family

ID=13236221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6367778A Pending JPS54155011A (en) 1978-05-27 1978-05-27 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS54155011A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945327A (en) * 1982-09-09 1984-03-14 Teijin Ltd Polyethylene terephthalate film for metallic thin film magnetic recording medium
JPS63107088A (en) * 1986-06-30 1988-05-12 東洋メタライジング株式会社 Manufacture of copper-plated film
JPH08132523A (en) * 1994-11-09 1996-05-28 Toray Ind Inc Low heat-shrinkable polyester film
JPH08164558A (en) * 1994-12-15 1996-06-25 Toray Ind Inc Polyester film

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4865256A (en) * 1971-12-13 1973-09-08
JPS4952254A (en) * 1972-09-19 1974-05-21
JPS5340506A (en) * 1976-09-24 1978-04-13 Matsushita Electric Ind Co Ltd Magnetic recording medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4865256A (en) * 1971-12-13 1973-09-08
JPS4952254A (en) * 1972-09-19 1974-05-21
JPS5340506A (en) * 1976-09-24 1978-04-13 Matsushita Electric Ind Co Ltd Magnetic recording medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945327A (en) * 1982-09-09 1984-03-14 Teijin Ltd Polyethylene terephthalate film for metallic thin film magnetic recording medium
JPH0218220B2 (en) * 1982-09-09 1990-04-24 Teijin Ltd
JPS63107088A (en) * 1986-06-30 1988-05-12 東洋メタライジング株式会社 Manufacture of copper-plated film
JPH08132523A (en) * 1994-11-09 1996-05-28 Toray Ind Inc Low heat-shrinkable polyester film
JPH08164558A (en) * 1994-12-15 1996-06-25 Toray Ind Inc Polyester film

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