JPS58153232A - 磁気記録媒体 - Google Patents

磁気記録媒体

Info

Publication number
JPS58153232A
JPS58153232A JP57033801A JP3380182A JPS58153232A JP S58153232 A JPS58153232 A JP S58153232A JP 57033801 A JP57033801 A JP 57033801A JP 3380182 A JP3380182 A JP 3380182A JP S58153232 A JPS58153232 A JP S58153232A
Authority
JP
Japan
Prior art keywords
film
magnetic recording
magnetic
recording medium
value
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
JP57033801A
Other languages
English (en)
Japanese (ja)
Other versions
JPH024060B2 (enFirst
Inventor
Tomoyuki Minami
智幸 南
Kazuhiro Tanaka
一博 田中
Takeshi Nishioka
健 西岡
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 JP57033801A priority Critical patent/JPS58153232A/ja
Priority to US06/425,960 priority patent/US4497865A/en
Priority to EP19820306263 priority patent/EP0086302B1/en
Priority to DE8282306263T priority patent/DE3277416D1/de
Publication of JPS58153232A publication Critical patent/JPS58153232A/ja
Priority to US06/654,599 priority patent/US4546030A/en
Priority to US06/748,295 priority patent/US4587071A/en
Publication of JPH024060B2 publication Critical patent/JPH024060B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • B29C55/16—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/005—Shaping by stretching, e.g. drawing through a die; Apparatus therefor characterised by the choice of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B29C55/065—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed in several stretching steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
    • B29C55/143—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively firstly parallel to the direction of feed and then transversely thereto
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Record Carriers (AREA)
  • Laminated Bodies (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
JP57033801A 1982-02-17 1982-03-05 磁気記録媒体 Granted JPS58153232A (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP57033801A JPS58153232A (ja) 1982-03-05 1982-03-05 磁気記録媒体
US06/425,960 US4497865A (en) 1982-02-17 1982-09-28 Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom
EP19820306263 EP0086302B1 (en) 1982-02-17 1982-11-24 Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom
DE8282306263T DE3277416D1 (en) 1982-02-17 1982-11-24 Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom
US06/654,599 US4546030A (en) 1982-02-17 1984-09-26 Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom
US06/748,295 US4587071A (en) 1982-02-17 1985-06-24 Production of polyethylene terephthalate film for magnetic recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57033801A JPS58153232A (ja) 1982-03-05 1982-03-05 磁気記録媒体

Publications (2)

Publication Number Publication Date
JPS58153232A true JPS58153232A (ja) 1983-09-12
JPH024060B2 JPH024060B2 (enFirst) 1990-01-25

Family

ID=12396572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57033801A Granted JPS58153232A (ja) 1982-02-17 1982-03-05 磁気記録媒体

Country Status (1)

Country Link
JP (1) JPS58153232A (enFirst)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60187928A (ja) * 1984-03-07 1985-09-25 Mitsubishi Chem Ind Ltd 磁気記録材料及びその製造方法
JPS6168727A (ja) * 1984-09-12 1986-04-09 Teijin Ltd 二軸延伸ポリエステルフイルム
JP2022529435A (ja) * 2019-11-19 2022-06-22 青島藍科途膜材料有限公司 高強度・高弾性ポリオレフィンフィルムを製造する設備及び方法並びに高強度・高弾性ポリオレフィンフィルム

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944083A (enFirst) * 1972-07-19 1974-04-25
JPS50139872A (enFirst) * 1974-04-26 1975-11-08
JPS548672A (en) * 1977-06-21 1979-01-23 Toray Ind Inc Production of polyester film
JPS5522915A (en) * 1978-08-07 1980-02-19 Toray Ind Inc Manufacture of polyester film
JPS5527211A (en) * 1978-08-15 1980-02-27 Toray Ind Inc Producing process of polyester film
US4497865A (en) * 1982-02-17 1985-02-05 Toray Industries, Inc. Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944083A (enFirst) * 1972-07-19 1974-04-25
JPS50139872A (enFirst) * 1974-04-26 1975-11-08
JPS548672A (en) * 1977-06-21 1979-01-23 Toray Ind Inc Production of polyester film
JPS5522915A (en) * 1978-08-07 1980-02-19 Toray Ind Inc Manufacture of polyester film
JPS5527211A (en) * 1978-08-15 1980-02-27 Toray Ind Inc Producing process of polyester film
US4497865A (en) * 1982-02-17 1985-02-05 Toray Industries, Inc. Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom
US4546030A (en) * 1982-02-17 1985-10-08 Toray Industries, Inc. Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60187928A (ja) * 1984-03-07 1985-09-25 Mitsubishi Chem Ind Ltd 磁気記録材料及びその製造方法
JPS6168727A (ja) * 1984-09-12 1986-04-09 Teijin Ltd 二軸延伸ポリエステルフイルム
JP2022529435A (ja) * 2019-11-19 2022-06-22 青島藍科途膜材料有限公司 高強度・高弾性ポリオレフィンフィルムを製造する設備及び方法並びに高強度・高弾性ポリオレフィンフィルム

Also Published As

Publication number Publication date
JPH024060B2 (enFirst) 1990-01-25

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