DE345644T1 - Polyesterfilm fuer magnetische aufzeichnungstraeger. - Google Patents

Polyesterfilm fuer magnetische aufzeichnungstraeger.

Info

Publication number
DE345644T1
DE345644T1 DE198989109937T DE89109937T DE345644T1 DE 345644 T1 DE345644 T1 DE 345644T1 DE 198989109937 T DE198989109937 T DE 198989109937T DE 89109937 T DE89109937 T DE 89109937T DE 345644 T1 DE345644 T1 DE 345644T1
Authority
DE
Germany
Prior art keywords
polyester film
particles
film according
inactive
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.)
Pending
Application number
DE198989109937T
Other languages
English (en)
Inventor
Takashi Yokohama-Shi Kanagawa-Ken Harada
Chikakazu Atsugi-Shi Tokyo Kawaguchi
Yoshio Machida-Shi Tokyo Meguro
Seiji Machida-Shi Tokyo Sakamoto
Toshifumi Setagaya-Ku Tokyo Takisawa
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.)
Diafoil Co Ltd
Original Assignee
Diafoil Co 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
Priority claimed from JP63138051A external-priority patent/JPH0755533B2/ja
Priority claimed from JP63142419A external-priority patent/JPH0781020B2/ja
Priority claimed from JP63175452A external-priority patent/JPH0224823A/ja
Priority claimed from JP63182362A external-priority patent/JPH0231322A/ja
Priority claimed from JP63182360A external-priority patent/JPH0231321A/ja
Priority claimed from JP63281977A external-priority patent/JPH02129230A/ja
Application filed by Diafoil Co Ltd filed Critical Diafoil Co Ltd
Publication of DE345644T1 publication Critical patent/DE345644T1/de
Pending 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
    • G11B5/73937—Substrates having an organic polymer comprising a ring structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • 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
    • G11B5/733—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 characterised by the addition of non-magnetic particles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/005—Additives being defined by their particle size in general
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/009—Additives being defined by their hardness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (7)

Übersetzung der Patentansprüche Europäische Patentanmeldung Nr. 89 109 937.6 (Veröffentlichungs-Nr. 0 345 644 DIAFOIL COMPANY LDVHTED Case: MCIL-203-2 tM/cb 19. Juli 1991 Patentansprüche .
1. Polyesterfolie für magnetische Aufzeichnungsmedien, enthaltend 0,05 bis 5 Gew.-% inaktive anorganische Teilchen (A) mit einem Mohs'schen Härte von 6 oder darüber und einer durchschnittlichen Teilchengröße von 0,005 bis 1,0 &mgr;&idiagr;&eegr; und 0,01 bis 2,0 Gew.-% inaktive Teilchen (B) mit einer durchschnittlichen Teilchengröße, die größer ist als die der Teilchen (A) und im Bereich von 0.1 bis 3,0 &mgr;&idiagr;&eegr; liegt, welche Polyesterfolie eine Grenzviskositätszahl im Bereich von 0.52 bis 0,65 aufweist.
2. Polyesterfolie nach Anspruch 1, worin die inaktiven anorganischen Teil chen (A) Teilchen aus &dgr;-Aluminiumoxid oder &ggr;-Aluminiumoxid sind.
3. Polyesterfolie nach Anspruch 2, worin die inaktiven Teilchen (B) Teilchen aus einem hitzebeständigen Polymer sind.
4. Polyesterfolie nach Anspruch 2, worin die inaktiven Teilchen (B) abgeschiedene Teilchen sind, die sich im Verlaufe des Verfahrens zur Herstellung des Polyesters ausscheiden.
5. Polyesterfolie nach einem der Ansprüche 1 bis 4, worin der Brechungsindex der Folie in der Dickenrichtung 1,492 oder darüber beträgt.
6. Polyesterfolie nach einem der Ansprüche 1 bis 4, worin die Dicke der Folie 12,0 &mgr;&idiagr;&eegr; oder weniger und der F-5-Wert der Folie in der Maschinenrichtung 12,0 kg/mm^ oder mehr betragen.
7. Polyesterfolie nach einem der Ansprüche 1 bis 4, worin der durch die folgende Formel (1)
&Dgr;&eegr; = &eeacgr;&khgr;&ogr; - nMD (1)
definierte Doppelbrechungsindex &Dgr;&eegr;, worin &eegr;^&tgr; für den Brechungsindex der Folie in der Querrichtung und n^D der Brechungsindex der Folie in der Maschinenrichtung bedeuten, 0,010 oder mehr beträgt.
DE198989109937T 1988-06-04 1989-06-01 Polyesterfilm fuer magnetische aufzeichnungstraeger. Pending DE345644T1 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP63138051A JPH0755533B2 (ja) 1988-06-04 1988-06-04 磁気記録媒体用ポリエステルフィルム
JP63142419A JPH0781020B2 (ja) 1988-06-09 1988-06-09 磁気記録媒体用ポリエステルフィルム
JP63175452A JPH0224823A (ja) 1988-07-14 1988-07-14 磁気記録媒体用二軸配向ポリエステルフィルム
JP63182362A JPH0231322A (ja) 1988-07-21 1988-07-21 磁気記録媒体用二軸配向ポリエステルフィルム
JP63182360A JPH0231321A (ja) 1988-07-21 1988-07-21 磁気記録媒体用二軸配向ポリエステルフィルム
JP63281977A JPH02129230A (ja) 1988-11-08 1988-11-08 配向ポリエステルフィルム

Publications (1)

Publication Number Publication Date
DE345644T1 true DE345644T1 (de) 1991-10-17

Family

ID=27552889

Family Applications (2)

Application Number Title Priority Date Filing Date
DE68919130T Expired - Fee Related DE68919130T2 (de) 1988-06-04 1989-06-01 Polyesterfilm für magnetische Aufzeichnungsträger.
DE198989109937T Pending DE345644T1 (de) 1988-06-04 1989-06-01 Polyesterfilm fuer magnetische aufzeichnungstraeger.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE68919130T Expired - Fee Related DE68919130T2 (de) 1988-06-04 1989-06-01 Polyesterfilm für magnetische Aufzeichnungsträger.

Country Status (4)

Country Link
US (1) US5006589A (de)
EP (1) EP0345644B1 (de)
KR (1) KR960008598B1 (de)
DE (2) DE68919130T2 (de)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69023351T2 (de) * 1989-01-11 1996-04-04 Toray Industries Biaxial orientierter Polyesterfilm.
US5284699A (en) * 1989-01-11 1994-02-08 Toray Industries, Inc. Biaxially oriented polyester film
JP2856283B2 (ja) * 1989-06-02 1999-02-10 三菱化学ポリエステルフィルム株式会社 二軸配向ポリエステルフィルム
JPH0778133B2 (ja) * 1989-12-14 1995-08-23 ダイアホイルヘキスト株式会社 二軸配向ポリエステルフィルム
EP0460640A1 (de) * 1990-06-07 1991-12-11 Diafoil Hoechst Co., Ltd Polyesterfilm für magnetische Aufzeichnungsmedien
JP2963949B2 (ja) * 1990-10-08 1999-10-18 東洋紡績株式会社 配向ポリエステルフィルム
US5368932A (en) * 1990-12-13 1994-11-29 Teijin Limited Biaxially oriented polyester film for magnetic recording media containing theta or mixed alpha plus gamma aluminum oxide and inert organic particles
JP2528215B2 (ja) * 1990-12-13 1996-08-28 帝人株式会社 磁気記録媒体用二軸配向ポリエステルフイルム
JPH07119297B2 (ja) * 1991-02-22 1995-12-20 ダイアホイルヘキスト株式会社 磁気記録媒体用ポリエチレンテレフタレートフィルム
US5431983A (en) * 1991-04-25 1995-07-11 Teijin Limited Magnetic recording tape comprising a polyethylene-2,6-napthalate substrate, magnetic metal thin film, and a backcoat layer
JP2698229B2 (ja) * 1991-04-25 1998-01-19 帝人株式会社 磁気記録テープ
JP2729189B2 (ja) * 1991-09-03 1998-03-18 ダイアホイルヘキスト株式会社 磁気記録媒体用積層ポリエステルフィルム
JPH05128490A (ja) * 1991-11-07 1993-05-25 Diafoil Co Ltd 磁気記録媒体用積層ポリエステルフイルム
EP0543600B1 (de) * 1991-11-18 1998-10-21 Toray Industries, Inc. Biaxial orientierter Film aus thermoplastischem Harz
CA2094434A1 (en) * 1992-04-30 1993-10-31 Tomoyuki Kotani Biaxially oriented laminated polyester film for magnetic recording media
EP0572224B2 (de) * 1992-05-27 2004-03-10 Teijin Limited Biaxial orientiertes Polyesterfilmlaminat
DE69330327T2 (de) * 1992-09-29 2002-05-02 Mitsubishi Polyester Film Corp Biaxial ausgerichteter Polyesterfilm für magnetisches Aufzeichnungsmedium
US5362571A (en) * 1994-03-16 1994-11-08 Teijin Limited Magnetic tape for use in cassette for digital audio tape recorder and biaxially oriented polyester base film therefor
JP3307716B2 (ja) * 1993-04-28 2002-07-24 三菱化学ポリエステルフィルム株式会社 高感度感熱孔版印刷原紙用フィルム
KR100188038B1 (ko) * 1993-09-14 1999-06-01 장용균 이축배향 폴리에스테르 필름의 제조방법
KR970002665B1 (ko) * 1993-12-31 1997-03-07 제일합섬 주식회사 자기기록매체용 이축배향 폴리에스테르 필름의 제조방법
EP0765912B1 (de) * 1995-04-13 2008-11-05 Toray Industries, Inc. Polyesterzusammensetzung und daraus hergestellte folien
US5858527A (en) * 1995-10-30 1999-01-12 Skc Limited Biaxially oriented polyester film
JP3464333B2 (ja) * 1996-03-07 2003-11-10 帝人株式会社 磁気記録媒体用ポリエステルフイルム
US6190753B1 (en) * 1997-12-11 2001-02-20 Teijin Limited Biaxially oriented polyester film for magnetic recording media
JP4026795B2 (ja) * 1998-10-02 2007-12-26 三菱化学ポリエステルフィルム株式会社 二軸配向ポリエステルフィルム
KR100381261B1 (ko) * 1999-12-20 2003-04-23 주식회사 코오롱 필름 제조용 폴리에스테르 조성물
JP4875823B2 (ja) * 2002-12-04 2012-02-15 日清紡ホールディングス株式会社 非石綿系摩擦材
KR20050109447A (ko) * 2003-03-25 2005-11-21 데이진 듀폰 필름 가부시키가이샤 대전 방지성 적층 폴리에스테르 필름
US8093315B2 (en) 2003-10-10 2012-01-10 Commonwealth Scientific And Industrial Research Organisation Wear resistant polymers
JP2009015962A (ja) * 2007-07-04 2009-01-22 Fujifilm Corp 磁気記録媒体及び磁気記録媒体の製造方法
FR3017072B1 (fr) * 2014-01-31 2016-02-19 Toray Films Europ Film de polyester transparent multicouche, son procede de fabrication et son utilisation notamment dans les faces arrieres de panneaux photovoltaiques

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US3821156A (en) * 1972-01-03 1974-06-28 Celanese Corp Polyethylene terephthalate film
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JPS5278954A (en) * 1975-12-26 1977-07-02 Teijin Ltd Polyester films
JPS5341355A (en) * 1976-09-29 1978-04-14 Toray Ind Inc Biaxilialy streched polyester film
JPS5515860A (en) * 1978-07-24 1980-02-04 Teijin Ltd Orientation polyester film
JPS55101136A (en) * 1979-01-26 1980-08-01 Teijin Ltd Oriented polyester film for magnetic tape
US4497865A (en) * 1982-02-17 1985-02-05 Toray Industries, Inc. Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom
DE3610167A1 (de) * 1986-03-26 1987-10-01 Hoechst Ag Mehrschichtige polyesterfolie fuer magnetische informationstraeger
DE3856541T2 (de) * 1987-04-07 2003-09-25 Toray Industries Polyesterfolie

Also Published As

Publication number Publication date
EP0345644A3 (en) 1990-12-27
US5006589A (en) 1991-04-09
DE68919130T2 (de) 1995-06-01
KR960008598B1 (ko) 1996-06-28
DE68919130D1 (de) 1994-12-08
EP0345644B1 (de) 1994-11-02
EP0345644A2 (de) 1989-12-13
KR910000871A (ko) 1991-01-30

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