JPS5683841A - Base film for magnetic recording - Google Patents

Base film for magnetic recording

Info

Publication number
JPS5683841A
JPS5683841A JP16052879A JP16052879A JPS5683841A JP S5683841 A JPS5683841 A JP S5683841A JP 16052879 A JP16052879 A JP 16052879A JP 16052879 A JP16052879 A JP 16052879A JP S5683841 A JPS5683841 A JP S5683841A
Authority
JP
Japan
Prior art keywords
mixed
magnetic
light shield
polyester film
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
JP16052879A
Other languages
Japanese (ja)
Other versions
JPH0226286B2 (en
Inventor
Masahiko Mogi
Hideo Inada
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 JP16052879A priority Critical patent/JPS5683841A/en
Publication of JPS5683841A publication Critical patent/JPS5683841A/en
Publication of JPH0226286B2 publication Critical patent/JPH0226286B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To make it possible to apply the magnetic material uniformly and thinly and prevent the occurrence of erroneous optical signals, by laminating the polyester film, where no light shield material is mixed, on one face or both faces of the polyester film where the light shield material is mixed.
CONSTITUTION: Polyester film A where no light shield material is mixed and TiO2 is mixed or not mixed is laminated on one face or both faces of polyester film B where the light shield material such as carbon black is mixed. The magnetic material is applied to this laminated base film for magnetic recording to form a magnetic recording tape or card. The magnetic signal is recorded on this magnetic layer, and the optical signal is recorded on the tape or card by punching small holes. Thus, even if exfoliation and scratches are generated in the magnetic layer due to repeated use, erroneous signals can be prevented from being given to the optical signal detecting part. Since it is possible that the magnetic layer is thin and the magnetic material is minute, high-output and high-density magnetic recording can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP16052879A 1979-12-11 1979-12-11 Base film for magnetic recording Granted JPS5683841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16052879A JPS5683841A (en) 1979-12-11 1979-12-11 Base film for magnetic recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16052879A JPS5683841A (en) 1979-12-11 1979-12-11 Base film for magnetic recording

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP20861887A Division JPS63220421A (en) 1987-08-21 1987-08-21 Base film for magnetic card

Publications (2)

Publication Number Publication Date
JPS5683841A true JPS5683841A (en) 1981-07-08
JPH0226286B2 JPH0226286B2 (en) 1990-06-08

Family

ID=15716906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16052879A Granted JPS5683841A (en) 1979-12-11 1979-12-11 Base film for magnetic recording

Country Status (1)

Country Link
JP (1) JPS5683841A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57205824A (en) * 1981-06-11 1982-12-17 Teijin Ltd Magnetic recording medium
US4546036A (en) * 1983-12-22 1985-10-08 Minnesota Mining And Manufacturing Company Magnetic recording medium having opaque polyester film base
JPS60254415A (en) * 1984-04-16 1985-12-16 ヘキスト　アクチエンゲゼルシヤフト Multilayer biaxially stretched support sheet for informationsupport by magnetism and manufacture thereof
US4603073A (en) * 1983-12-22 1986-07-29 Minnesota Mining And Manufacturing Company Opaque polyester film containing fine carbon black particles
JPS62143938A (en) * 1985-12-17 1987-06-27 Diafoil Co Ltd Polyethylene-2,6-naphthalate film for high-density magnetic recording medium
JPS638937U (en) * 1986-07-04 1988-01-21
JPS63149830A (en) * 1986-12-12 1988-06-22 Dainippon Printing Co Ltd Multi-layered film for information memory card
JPH01105740A (en) * 1987-10-19 1989-04-24 Diafoil Co Ltd Polyester multilayer film for prepaid card
JPH0382537A (en) * 1989-08-28 1991-04-08 Toray Ind Inc Composite polyester film
JPH0382536A (en) * 1989-08-28 1991-04-08 Toray Ind Inc Composite polyester film
JPH0382535A (en) * 1989-08-28 1991-04-08 Toray Ind Inc Composite polyester film
JPH0382534A (en) * 1989-08-28 1991-04-08 Toray Ind Inc Composite polyester film
JP2009061780A (en) * 1996-08-14 2009-03-26 Dupont Teijin Films Us Lp Polyester film

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5093103A (en) * 1973-12-19 1975-07-25
JPS51147408U (en) * 1975-05-20 1976-11-26
JPS52206U (en) * 1975-06-20 1977-01-05
JPS5256902A (en) * 1975-11-06 1977-05-10 Sony Corp Production of magnetic recording medium
JPS5331112A (en) * 1976-09-03 1978-03-24 Matsushita Electric Ind Co Ltd Magnetic tape
JPS5356804U (en) * 1976-10-18 1978-05-15

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52206B2 (en) * 1972-08-30 1977-01-06

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5093103A (en) * 1973-12-19 1975-07-25
JPS51147408U (en) * 1975-05-20 1976-11-26
JPS52206U (en) * 1975-06-20 1977-01-05
JPS5256902A (en) * 1975-11-06 1977-05-10 Sony Corp Production of magnetic recording medium
JPS5331112A (en) * 1976-09-03 1978-03-24 Matsushita Electric Ind Co Ltd Magnetic tape
JPS5356804U (en) * 1976-10-18 1978-05-15

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6223367B2 (en) * 1981-06-11 1987-05-22 Teijin Ltd
JPS57205824A (en) * 1981-06-11 1982-12-17 Teijin Ltd Magnetic recording medium
US4546036A (en) * 1983-12-22 1985-10-08 Minnesota Mining And Manufacturing Company Magnetic recording medium having opaque polyester film base
US4603073A (en) * 1983-12-22 1986-07-29 Minnesota Mining And Manufacturing Company Opaque polyester film containing fine carbon black particles
JPS60254415A (en) * 1984-04-16 1985-12-16 ヘキスト　アクチエンゲゼルシヤフト Multilayer biaxially stretched support sheet for informationsupport by magnetism and manufacture thereof
JPH0625267B2 (en) * 1985-12-17 1994-04-06 ダイアホイルヘキスト株式会社 Polyethylene-2,6-naphthalate film for high density magnetic recording media
JPS62143938A (en) * 1985-12-17 1987-06-27 Diafoil Co Ltd Polyethylene-2,6-naphthalate film for high-density magnetic recording medium
JPS638937U (en) * 1986-07-04 1988-01-21
JPS63149830A (en) * 1986-12-12 1988-06-22 Dainippon Printing Co Ltd Multi-layered film for information memory card
JPH01105740A (en) * 1987-10-19 1989-04-24 Diafoil Co Ltd Polyester multilayer film for prepaid card
JPH07112730B2 (en) * 1987-10-19 1995-12-06 ダイアホイルヘキスト株式会社 Polyester multilayer film for prepaid cards
JPH0382536A (en) * 1989-08-28 1991-04-08 Toray Ind Inc Composite polyester film
JPH0382535A (en) * 1989-08-28 1991-04-08 Toray Ind Inc Composite polyester film
JPH0382534A (en) * 1989-08-28 1991-04-08 Toray Ind Inc Composite polyester film
JPH0382537A (en) * 1989-08-28 1991-04-08 Toray Ind Inc Composite polyester film
JP2009061780A (en) * 1996-08-14 2009-03-26 Dupont Teijin Films Us Lp Polyester film

Also Published As

Publication number Publication date
JPH0226286B2 (en) 1990-06-08

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