JPS5683842A - Base film for magnetic recording - Google Patents

Base film for magnetic recording

Info

Publication number
JPS5683842A
JPS5683842A JP16086179A JP16086179A JPS5683842A JP S5683842 A JPS5683842 A JP S5683842A JP 16086179 A JP16086179 A JP 16086179A JP 16086179 A JP16086179 A JP 16086179A JP S5683842 A JPS5683842 A JP S5683842A
Authority
JP
Japan
Prior art keywords
film
average height
longitudinal
surface protrusion
magnetic recording
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
JP16086179A
Other languages
Japanese (ja)
Other versions
JPH0219525B2 (en
Inventor
Yasuki Miura
Masahiko Mogi
Kazuo Okabe
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP16086179A priority Critical patent/JPS5683842A/en
Publication of JPS5683842A publication Critical patent/JPS5683842A/en
Publication of JPH0219525B2 publication Critical patent/JPH0219525B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To improve running, resistance to wear, and planeness of the film, by secifying strength for elongation in longitudinal and transversal directions, average height of surface protrusion, and the ratio of average height of surface protrusion to the incorporated particle average diameter.
CONSTITUTION: This base film for magnetic recording is the biaxial oriented polyester film where F-5 value (strength for 5% elongation) in longitudinal and transversal direction, the average height of surface protrusion, and the ratio of average height of surface protrusion to the incorporated particle average diameter of the incorporated particle are 9W15kg/mm2, ≤0.040μ, and ≤5.1×10-5 respectively Polyester incorporating corpuscles is melted and pressed out from a slit-form mouth piece to generate an nonoriented film, and next, this film is oriented in longitudinal and transversal directions and is orientated biaxially, and a calendar process is provided in the orientation process or after this process to press in surface protrusions of the film, and the surface state is adjusted, thereby producing this film.
COPYRIGHT: (C)1981,JPO&Japio
JP16086179A 1979-12-13 1979-12-13 Base film for magnetic recording Granted JPS5683842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16086179A JPS5683842A (en) 1979-12-13 1979-12-13 Base film for magnetic recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16086179A JPS5683842A (en) 1979-12-13 1979-12-13 Base film for magnetic recording

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP58158107A Division JPS5982629A (en) 1983-08-31 1983-08-31 Base film for magnetic recording

Publications (2)

Publication Number Publication Date
JPS5683842A true JPS5683842A (en) 1981-07-08
JPH0219525B2 JPH0219525B2 (en) 1990-05-02

Family

ID=15723955

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16086179A Granted JPS5683842A (en) 1979-12-13 1979-12-13 Base film for magnetic recording

Country Status (1)

Country Link
JP (1) JPS5683842A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5919231A (en) * 1982-07-26 1984-01-31 Fuji Photo Film Co Ltd Magnetic recording body
JPS5975432A (en) * 1982-10-22 1984-04-28 Fuji Photo Film Co Ltd Magnetic recording body

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5919231A (en) * 1982-07-26 1984-01-31 Fuji Photo Film Co Ltd Magnetic recording body
JPH0479058B2 (en) * 1982-07-26 1992-12-14 Fuji Photo Film Co Ltd
JPS5975432A (en) * 1982-10-22 1984-04-28 Fuji Photo Film Co Ltd Magnetic recording body
JPH0479059B2 (en) * 1982-10-22 1992-12-14 Fuji Photo Film Co Ltd

Also Published As

Publication number Publication date
JPH0219525B2 (en) 1990-05-02

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