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GB836202A - Improvements in or relating to magnetic recording tapes - Google Patents

Improvements in or relating to magnetic recording tapes

Info

Publication number
GB836202A
GB836202A GB28606/56A GB2860656A GB836202A GB 836202 A GB836202 A GB 836202A GB 28606/56 A GB28606/56 A GB 28606/56A GB 2860656 A GB2860656 A GB 2860656A GB 836202 A GB836202 A GB 836202A
Authority
GB
United Kingdom
Prior art keywords
substratum
magnetic
layer
rubber
magnetic layer
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
GB28606/56A
Inventor
Anthony Bernard Cobb
Witold Titow
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.)
YARSLEY RES LAB Ltd
Original Assignee
YARSLEY RES LAB 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 YARSLEY RES LAB Ltd filed Critical YARSLEY RES LAB Ltd
Priority to GB28606/56A priority Critical patent/GB836202A/en
Publication of GB836202A publication Critical patent/GB836202A/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
    • G11B5/73—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

Landscapes

  • Paints Or Removers (AREA)

Abstract

836,202. Coated polyethylene terephthalate tapes. YARSLEY RESEARCH LABORATORIES Ltd., [formerly YARSLEY (RESEARCH LABORATORIES) Ltd., V. E.]. Sept. 18, 1957 [Sept. 19, 1956], No. 28606/56. Class 140. [Also in Group XXXV] A magnetic recording tape comprises a polyethylene terephthalate base material, to which is applied a substratum layer of an elastomeric composition or a polyisocyanate, to provide adhesion between said base material and a magnetic layer containing magnetic iron oxide. The substratum layer which may be applied by film casting methods, casting, spraying, or roller coating, may comprise a butadiene/acrylonitrile rubber-phenolic resin composition or 4,4<SP>1</SP>,4<SP>11</SP>-triisocyanato triphenyl methane, preferably compounded with an elastomer, such as natural rubber, or butadiene/acrylonitrile rubber. The substratum coating is substantially dried prior to the application of the magnetic layer, and is then substantially cured at room temperature or at an elevated temperature, e.g. not exceeding 165‹ C. The magnetic layer may comprise finely divided magnetic iron oxide together with an elastomeric bonding medium, e.g. cellulose acetate, crepe rubber, coumarone resins.
GB28606/56A 1956-09-19 1956-09-19 Improvements in or relating to magnetic recording tapes Expired GB836202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB28606/56A GB836202A (en) 1956-09-19 1956-09-19 Improvements in or relating to magnetic recording tapes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28606/56A GB836202A (en) 1956-09-19 1956-09-19 Improvements in or relating to magnetic recording tapes

Publications (1)

Publication Number Publication Date
GB836202A true GB836202A (en) 1960-06-01

Family

ID=10278277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28606/56A Expired GB836202A (en) 1956-09-19 1956-09-19 Improvements in or relating to magnetic recording tapes

Country Status (1)

Country Link
GB (1) GB836202A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487802A (en) * 1982-01-19 1984-12-11 Fuji Photo Film Co., Ltd. Magnetic recording medium
US4671995A (en) * 1984-02-13 1987-06-09 Victor Company Of Japan, Ltd. Magnetic recording medium comprising an undercoating made of a mixture of thermosetting polyurethane and polyester resins

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487802A (en) * 1982-01-19 1984-12-11 Fuji Photo Film Co., Ltd. Magnetic recording medium
US4671995A (en) * 1984-02-13 1987-06-09 Victor Company Of Japan, Ltd. Magnetic recording medium comprising an undercoating made of a mixture of thermosetting polyurethane and polyester resins

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