GB1547241A - Polyester film for making magnetic tape - Google Patents

Polyester film for making magnetic tape

Info

Publication number
GB1547241A
GB1547241A GB29417/76A GB2941776A GB1547241A GB 1547241 A GB1547241 A GB 1547241A GB 29417/76 A GB29417/76 A GB 29417/76A GB 2941776 A GB2941776 A GB 2941776A GB 1547241 A GB1547241 A GB 1547241A
Authority
GB
United Kingdom
Prior art keywords
magnetic tape
polyester film
making magnetic
making
polyester
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.)
Expired
Application number
GB29417/76A
Other languages
English (en)
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.)
Mitsubishi Kasei Corp
Original Assignee
Mitsubishi Kasei 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
Priority claimed from JP8793675A external-priority patent/JPS5211908A/ja
Priority claimed from JP50088991A external-priority patent/JPS5212803A/ja
Application filed by Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Publication of GB1547241A publication Critical patent/GB1547241A/en
Expired 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/708—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by addition of non-magnetic particles to the layer
    • G11B5/7085—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by addition of non-magnetic particles to the layer non-magnetic abrasive particles
    • 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
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates
    • G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
GB29417/76A 1975-07-18 1976-07-15 Polyester film for making magnetic tape Expired GB1547241A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8793675A JPS5211908A (en) 1975-07-18 1975-07-18 Polyethylene telephutarate film
JP50088991A JPS5212803A (en) 1975-07-21 1975-07-21 Polyethylene terephthalate film for magnetic tape

Publications (1)

Publication Number Publication Date
GB1547241A true GB1547241A (en) 1979-06-06

Family

ID=26429167

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29417/76A Expired GB1547241A (en) 1975-07-18 1976-07-15 Polyester film for making magnetic tape

Country Status (3)

Country Link
DE (1) DE2632094A1 (de)
FR (1) FR2318192A1 (de)
GB (1) GB1547241A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375494A (en) 1980-03-12 1983-03-01 Imperial Chemical Industries Plc Polyester film composites

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548855A (en) * 1982-11-02 1985-10-22 Toray Industries, Inc. Polyester film for magnetic recording medium
GB2134442B (en) * 1983-01-18 1987-05-28 Diafoil Co Ltd Polyester film for magnetic recording media
FR2561982B1 (fr) * 1984-04-03 1987-05-29 Rhone Poulenc Films Films minces polyester etires charges a faible rugosite; procede d'obtention; utilisation de ces films pour la fabrication de bandes magnetiques

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657180A (en) * 1970-01-08 1972-04-18 Goodyear Tire & Rubber Slip agents for polyester film
LU63481A1 (de) * 1970-07-07 1972-04-04
US3821156A (en) * 1972-01-03 1974-06-28 Celanese Corp Polyethylene terephthalate film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375494A (en) 1980-03-12 1983-03-01 Imperial Chemical Industries Plc Polyester film composites

Also Published As

Publication number Publication date
DE2632094A1 (de) 1977-01-27
FR2318192A1 (fr) 1977-02-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee