KR970059210A - 2 축 배향 적층 폴리에스테르 필름 - Google Patents

2 축 배향 적층 폴리에스테르 필름 Download PDF

Info

Publication number
KR970059210A
KR970059210A KR1019970001982A KR19970001982A KR970059210A KR 970059210 A KR970059210 A KR 970059210A KR 1019970001982 A KR1019970001982 A KR 1019970001982A KR 19970001982 A KR19970001982 A KR 19970001982A KR 970059210 A KR970059210 A KR 970059210A
Authority
KR
South Korea
Prior art keywords
lubricant
film
particles
particle
weight
Prior art date
Application number
KR1019970001982A
Other languages
English (en)
Other versions
KR100219890B1 (ko
Inventor
마사후미 고세끼
도시후미 오오사와
이에야스 고바야시
Original Assignee
이따가끼 히로시
데이진 가부시끼가이샤
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11784402&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=KR970059210(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 이따가끼 히로시, 데이진 가부시끼가이샤 filed Critical 이따가끼 히로시
Publication of KR970059210A publication Critical patent/KR970059210A/ko
Application granted granted Critical
Publication of KR100219890B1 publication Critical patent/KR100219890B1/ko

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • G11B5/73935—Polyester substrates, e.g. polyethylene terephthalate characterised by roughness or surface features, e.g. by added particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • 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
    • G11B5/73931—Two or more layers, at least one layer being polyester
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/518—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/538—Roughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2429/00—Carriers for sound or information
    • B32B2429/02—Records or discs
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/91—Product with molecular orientation
    • 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
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254—Polymeric or resinous material
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/258—Alkali metal or alkaline earth metal or compound thereof
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/259—Silicic material
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]

Landscapes

  • Laminated Bodies (AREA)
  • Magnetic Record Carriers (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

윤활제 입자 Ⅰ및 Ⅱ를 함유하는 폴리에스테르 충 A 및 폴리에스페르 충 A의 다른 쪽에 적층된 폴리에스테르 충 B로 구성된 2축 배향 적층 폴리에스테르 필름으로서, 윤활제 입자 Ⅰ및 Ⅱ가 80내지 100%이 비율로 비응집된 입자를 함유하고, 윤활제 입자 Ⅰ의 평균 입자 직경이 0.3 내지 1.0㎛이고, 이의 함유량이 0.05중량% 이상, 0.1중량% 미만이고, 윤활제 입자 Ⅱ의 평균 입자 직경이 하기 수학식(1)을 만족시키고: 1〈dⅠ/dⅡ≤10 (1)
(상기 식에서, dⅠ는 윤활제 입자 Ⅰ의 평균입자 직경이고 dⅡ는 윤활제 입자 Ⅱ의 평균입자 직경이다.)이의 함유량이 0.1중량% 미만임을 특징으로 하는 2축 배향 적층 폴리에스테르 필름. 이 2축 배향 적층 폴리에스테르 필름은 탁월한 평활성, 조각 분쇄 내성 및 권치성을 가지며, 자기 기록 매체용 기재 필름으로서 유용하다.

Description

2축 배향 적층 폴리에스테르 필름
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (17)

  1. 윤활제 입자 Ⅰ 및 Ⅱ를 함유하는 폴리에스테르 층 A 및 폴리에스테르 층 A의 다른 쪽에 적층된 폴리에스테르 층 B로 구성된 2축 배향 적층 폴리에스테르 필름으로서, 윤활제 입자 Ⅰ 및 Ⅱ가 80내지 100%의 비율로 비응집된 입자를 함유하고, 윤활제 입자 Ⅰ의 평균 입자 직경이 0.3 내지 1.0㎛이고, 이의 함유량이 0.005중량% 이상, 0.1중량% 미만이고, 윤활제 입자 Ⅱ의 평균 입자 직경이 하기 수학식(1)을 만족시키고 :
    1〈dⅠ/dⅡ≤10 (1)
    (상기 식에서, dⅠ는 윤활제 입자 Ⅰ의 평균 입자 직경이고, dⅡ는 윤활제 입자 Ⅱ의 평균 입자 직경이다.)이의 함유량이 0.1중량% 이상, 1.0중량% 미만임을 특징으로 하는 2축 배향 적층 폴리에스테르 필름.
  2. 제1항에 있어서, 비응집된 입자의 비율이 윤활제 입자 Ⅰ의 85 내지 97%인 필름.
  3. 제1항에 있어서, 비응집된 입자의 비율이 윤활제 입자 Ⅱ의 85 내지 97%인 필름.
  4. 제1항에 있어서, 윤활제 입자 Ⅰ의 평균 입자 직경이 0.4내지 0.8㎛인 필름.
  5. 제1항에 있어서, 윤활제 입자 Ⅱ가 하기 수학식 (2)를 만족시키는 평균 입자 직경을 갖는 필름 : 2≤dⅠ/dⅡ≤8 (2)
    (상기 식에서, dⅠ및 dⅡ는 청구 범위 제1항의 수학식(1)에서 정의된 바와 같다.)
  6. 제1항에 있어서, 윤활제 입자 Ⅰ의 함량이 0.008 내지 0.08중량%인 필름.
  7. 제1항에 있어서, 윤활제 입자 Ⅱ의 함량이 0.2 내지 0.5중량%인 필름.
  8. 제1항에 있어서, 윤활제 입자 Ⅰ및 윤활제 입자 Ⅱ가 다른 종류인 필름.
  9. 제1항에 있어서, 윤활제 입자 Ⅰ및 윤활제 입자 Ⅱ 가 동일한 종류이고, 윤활제 입자 Ⅰ의 입자 크기 분포 및 윤활제 입자 Ⅱ의 입자 크기 분포를 합한 입자 크기 분포가 입자 크기면에서 2개 이상의 피이크를 갖는 필름.
  10. 제1항에 있어서, 폴리에스테르 층 A의 외부 표면의 중심면 평균 표면 조도AWRa가 2 내지 15nm인 필름.
  11. 제1항에 있어서, 폴리에스테르 층 B의 외부 표면의 중심면 평균 표면 조도BWRa가 0.1 내지 8nm인 필름.
  12. 제1항에 있어서, 폴리에스테르 층 A의 두께가 0.5 내지 2㎛인 필름.
  13. 제1항에 있어서, 두께가 2내지 10㎛인 필름.
  14. 제1항에 있어서, 서로 수직한 두 방향의 영의 모듈이 400 내지 2000㎏/㎟인 필름.
  15. 청구 범위 제1항의 필름으로 된 기재층 및 상기 필름이 폴리에스테르 층 A상에 형성된 자기 기록층을 포함하는 자기 기록 매체.
  16. 제15항에 있어서, 디지탈 기록용 자기 테이프인 자기 기록 매체.
  17. 자기 기록 매체용 기재 필름으로 사용함을 특징으로 하는 청구 범위 제1항의 필름.
    ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019970001982A 1996-01-26 1997-01-24 2 축 배향 적층 폴리에스테르 필름 KR100219890B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP01166996A JP3345247B2 (ja) 1996-01-26 1996-01-26 積層二軸配向ポリエステルフイルム
JP011,669/1996 1996-01-26

Publications (2)

Publication Number Publication Date
KR970059210A true KR970059210A (ko) 1997-08-12
KR100219890B1 KR100219890B1 (ko) 1999-09-01

Family

ID=11784402

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970001982A KR100219890B1 (ko) 1996-01-26 1997-01-24 2 축 배향 적층 폴리에스테르 필름

Country Status (6)

Country Link
US (1) US5919550A (ko)
EP (1) EP0786765B1 (ko)
JP (1) JP3345247B2 (ko)
KR (1) KR100219890B1 (ko)
DE (1) DE69721856T2 (ko)
TW (1) TW339311B (ko)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1134262A (ja) * 1997-07-22 1999-02-09 Teijin Ltd 積層二軸配向ポリエステルフィルム
US6465075B2 (en) 1999-03-04 2002-10-15 Teijin Limited Biaxially oriented laminate polyester film
EP1033244B1 (en) * 1999-03-04 2004-02-11 Teijin Limited Biaxially oriented laminate polyester film
US8485460B2 (en) * 1999-12-28 2013-07-16 Teijin Limited Polyester film roll
DE10013263A1 (de) * 2000-03-17 2001-09-20 Mitsubishi Polyester Film Gmbh Biaxial orientierte Trägerfolie für magnetische Aufzeichnungen
WO2007095176A2 (en) * 2006-02-14 2007-08-23 Toray Plastics (America), Inc. Biaxially oriented polyester film for molding process
US8563122B1 (en) * 2006-12-01 2013-10-22 Design Imaging, Llc Thermoplastic architectural composite laminate materials and associated methods of manufacture
TWI400188B (zh) * 2008-12-15 2013-07-01 Benq Materials Corp 自動對位系統及其控制方法

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818581A (en) * 1986-08-27 1989-04-04 Teijin Limited Biaxially oriented polyester film
JPH0659679B2 (ja) * 1989-09-01 1994-08-10 東レ株式会社 二軸配向熱可塑性樹脂フイルム
KR960005446B1 (ko) * 1990-04-18 1996-04-25 데이진 가부시끼가이샤 자기기록매체용 2축배향 폴리에스테르 필림
EP0460640A1 (en) * 1990-06-07 1991-12-11 Diafoil Hoechst Co., Ltd Polyester film for magnetic recording media
JP2581287B2 (ja) * 1990-09-10 1997-02-12 東レ株式会社 二軸配向熱可塑性樹脂フィルム
DE69227354T2 (de) * 1991-11-18 1999-05-06 Toray Industries, Inc., Tokio/Tokyo 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
DE69321291T3 (de) * 1992-05-27 2004-11-18 Teijin Ltd. Biaxial orientiertes Polyesterfilmlaminat
EP0590570B1 (en) * 1992-09-29 2001-06-13 Diafoil Hoechst Co., Ltd Biaxially oriented polyester film for magnetic recording medium
JP2897554B2 (ja) * 1992-10-27 1999-05-31 東レ株式会社 二軸配向フィルム
EP0609060B1 (en) * 1993-01-27 1997-05-07 Teijin Limited Biaxially oriented laminated polyester film and magnetic recording medium having the same as base film
DE69424703D1 (de) * 1993-03-16 2000-07-06 Teijin Ltd Magnetband zur Verwendung in Kassetten für digitale Tonbandgeräte und biaxial orientierte Polyesterfilme dafür
JP2954807B2 (ja) * 1993-05-13 1999-09-27 帝人株式会社 二軸配向積層ポリエステルフイルム
JP2925057B2 (ja) * 1993-08-30 1999-07-26 東レ株式会社 二軸配向積層ポリエステルフイルム
JPH07114726A (ja) * 1993-10-19 1995-05-02 Toray Ind Inc 磁気記録媒体用ポリエステルフィルム
JPH07113014A (ja) * 1993-10-19 1995-05-02 Toray Ind Inc 磁気記録媒体用ポリエステルフィルム
JP3254915B2 (ja) * 1994-07-22 2002-02-12 東レ株式会社 ポリエステルフイルム
JP3275546B2 (ja) * 1994-07-22 2002-04-15 東レ株式会社 積層ポリエステルフィルム

Also Published As

Publication number Publication date
EP0786765A3 (en) 1999-04-28
DE69721856T2 (de) 2004-02-26
KR100219890B1 (ko) 1999-09-01
US5919550A (en) 1999-07-06
DE69721856D1 (de) 2003-06-18
JP3345247B2 (ja) 2002-11-18
EP0786765A2 (en) 1997-07-30
TW339311B (en) 1998-09-01
EP0786765B1 (en) 2003-05-14
JPH09201926A (ja) 1997-08-05

Similar Documents

Publication Publication Date Title
KR940005724A (ko) 자기 기록 매체용 2축 배향 적층 폴리에스테르 필름
KR940005397A (ko) 2축 배향 적층 폴리에스테르 필름
KR920017811A (ko) 2축배향적층필름
KR860008872A (ko) 금속박막 자기기록 매체용 폴리에스테르 필름
KR940005723A (ko) 적층 필름
KR970059210A (ko) 2 축 배향 적층 폴리에스테르 필름
KR920001447A (ko) 자기기록매체
KR970076525A (ko) 이축 배향 적층 필름 및 자기 기록 매체
KR900010651A (ko) 자기 기록 매체
KR950005544A (ko) 2축배향적층 폴리에스테르필름
KR930005777A (ko) 자기기록 매체용 적층 폴리에스테르 필름
KR930001157A (ko) 광학 테이프
KR850004836A (ko) 자성기록매체
KR900013468A (ko) 자기 기록 매체
KR920016501A (ko) 자기 기록 매체용 폴리에틸렌 테레프탈레이트 필름
KR940006084A (ko) 폴리에스테르 필름
KR950001631A (ko) 자기 기록 매체
KR950009554A (ko) 자기기록 매체용 이축배향 폴리에스테르 필름의 제조
KR930019737A (ko) 폴리에스테르 적층필름
KR960021531A (ko) 고밀도 자기기록매체용 이축배향 폴리에스테르 필름
KR940009257A (ko) 폴리에스테르 필름
KR920015280A (ko) 자기 기록 매체
KR960701435A (ko) 하부 피복층을 갖는 기록 밀도가 큰 자기 기록 매체(high recording density magnetic recording medium having an undercoat layer)
EP0950681A4 (en) BIAXIAL ORIENTED POLYESTER FILM AND MAGNETIC RECORDING MEDIUM THAT CONTAINS THIS BASE FILM
KR970005626A (ko) 금속박막 자기기록매체용 이축배향 폴리에틸렌테레프탈레이트 필름

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20120601

Year of fee payment: 14

FPAY Annual fee payment

Payment date: 20130603

Year of fee payment: 15

LAPS Lapse due to unpaid annual fee