KR850002138A - 자기기록매체(磁氣記綠媒體), 그리고 자기기록매체용 자성분말(磁性粉末) - Google Patents

자기기록매체(磁氣記綠媒體), 그리고 자기기록매체용 자성분말(磁性粉末) Download PDF

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Publication number
KR850002138A
KR850002138A KR1019840004910A KR840004910A KR850002138A KR 850002138 A KR850002138 A KR 850002138A KR 1019840004910 A KR1019840004910 A KR 1019840004910A KR 840004910 A KR840004910 A KR 840004910A KR 850002138 A KR850002138 A KR 850002138A
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KR
South Korea
Prior art keywords
magnetic recording
recording medium
acid
magnetic
plane
Prior art date
Application number
KR1019840004910A
Other languages
English (en)
Other versions
KR920003489B1 (ko
Inventor
하루오 안도우 (외 1)
Original Assignee
나가이 아쯔시 (외 1)
히다찌 마구세루 가부시기 가이샤
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.)
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Publication date
Application filed by 나가이 아쯔시 (외 1), 히다찌 마구세루 가부시기 가이샤 filed Critical 나가이 아쯔시 (외 1)
Publication of KR850002138A publication Critical patent/KR850002138A/ko
Application granted granted Critical
Publication of KR920003489B1 publication Critical patent/KR920003489B1/ko

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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
    • 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
    • G11B5/714—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 the dimension of the magnetic 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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • 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
    • G11B5/706—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 the composition of the magnetic material
    • G11B5/70626—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 the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—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 the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—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 the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • 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
    • G11B5/712—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 the surface treatment or coating of magnetic particles
    • 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
    • Y10S428/90—Magnetic feature
    • 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
    • Y10T428/256—Heavy metal or aluminum or compound thereof

Landscapes

  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

내용 없음

Description

자기기록매체(磁氣記綠媒體) 그리고 자기기록매체용 자성분말(磁性粉末)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (5)

  1. 비자성의 지지체 위에다가 자기 기록 소자, 결합제 성분, 그리고 기타의 첨가제 성분으로 된 자성체층을 형성하여서 되는 자기 기록 매에에 있어서, 상기 자기 기록소자로서 입자으니 공골율이 평균 5용량%이하이고, 입자의 비표면적이 24㎡/g~30㎡/g이며, X선 회절에 의한(210)면의 강도가(311)면의 강도에 대하여 5% 이하인 침상의 γ-Fe2O3분말을 주성분으로 포함하는 것을 특징으로 하는 자기 기록 매체.
  2. 결합제 성분으로서 수산기 내지 카르복실기를 함유하는 염화 비닐/식초산 비닐의 공중합체와 또 섬유소 계통의 수지로 된 것들 중에서 선택된 최소한 한가지를 포함하는 것을 특징으로 하는 특허청구 범위 제1항 기재의 자기 기록 매체.
  3. 상기 첨가제 성분으로서 다음과 같은 일반식(Ⅰ)과 (Ⅱ)
    (단 식 중에는 R는 탄소의 수가 8-30의 알킬기 또는 알킬 페닐기, n는 2-10의 자연수이다). 로 표시되는 인산 에스터 계통의 계면 활성제가 포함되어 있는 것을 특징으로 하는 특허청구범위 제1항과 제2항기재의 자기 기록 매체.
  4. 입자의 공공율이 평균 5용량% 이하이고, 또 입자의 비표면적이 24㎡/g~30㎡/g이며, X선 회절에 의한(210)면의 강도가(311)면의 강도에 대하여 5% 이하인 침상의 γ-Fe2O3분말로 된 것을 특징으로 하는 자기 기록 매체용 자성 분말.
  5. 결정화 제어제의 성분으로서 폴리카르본산, 히드록시카르본산, 아미노카르본산, 폴리아민, 유기포스폰산, 지오카르본산, β-다가알콜디카르보닐화합물, 방향족 설폰산 및 이들의 염과 에스터, 또는 기타의 인산염들 중에서 선택된 최소한 한가지를 포함해서 이루어지는 특허청구범위 제1항과 제2항 그리고 제3항 기재의 자기 기록 매체.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019840004910A 1983-08-18 1984-08-16 자기기록매체 및 자기기록매체용 자성분말 KR920003489B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58-151116 1983-08-18
JP58151116A JPS6042804A (ja) 1983-08-18 1983-08-18 磁気記録媒体及び磁気記録媒体用磁性粉末

Publications (2)

Publication Number Publication Date
KR850002138A true KR850002138A (ko) 1985-05-06
KR920003489B1 KR920003489B1 (ko) 1992-05-01

Family

ID=15511706

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019840004910A KR920003489B1 (ko) 1983-08-18 1984-08-16 자기기록매체 및 자기기록매체용 자성분말

Country Status (5)

Country Link
US (1) US4693931A (ko)
EP (1) EP0135774B1 (ko)
JP (1) JPS6042804A (ko)
KR (1) KR920003489B1 (ko)
DE (1) DE3480970D1 (ko)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5028483A (en) * 1990-06-01 1991-07-02 Minnesota Mining And Manufacturing Company Magnetic recording medium comprising acicular dendrite free iron oxide magnetic pigment particles
JP2883229B2 (ja) * 1990-09-14 1999-04-19 富士写真フイルム株式会社 磁気記録媒体
US5397826A (en) * 1993-12-22 1995-03-14 Eastman Kodak Company Coating compositions for a transparent magnetic recording layer
JPH08102034A (ja) * 1994-09-19 1996-04-16 Minnesota Mining & Mfg Co <3M> 磁気記録媒体
KR20020031823A (ko) * 2000-10-24 2002-05-03 김동수 파우더 고착 방지 수단을 구비한 배기가스 이송 파이프
AU2003274417A1 (en) * 2002-10-30 2004-05-25 Council Of Scientific And Industrial Research Process for preparing nanosized acicular magnetic maghemite phase iron oxide particles
KR101268335B1 (ko) * 2003-11-10 2013-05-28 파나소닉 주식회사 기록매체, 재생장치, 재생방법
DE102014206349A1 (de) * 2014-04-02 2015-10-08 Tesa Se Klebeband

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003965A (en) * 1953-09-29 1961-10-10 Philips Corp Method of preparing a magnetic sound carrier
JPS52142756A (en) * 1976-05-24 1977-11-28 Tdk Corp Nitrocellulose and magnetic recording media
US4202871A (en) * 1977-11-14 1980-05-13 Sakai Chemical Industry Co., Ltd. Production of acicular ferric oxide
JPS54107709A (en) * 1978-02-10 1979-08-23 Victor Co Of Japan Ltd Magnetic recording material
JPS554694A (en) * 1979-05-10 1980-01-14 Canon Inc Electronic apparatus
JPS5661035A (en) * 1979-10-24 1981-05-26 Hitachi Maxell Ltd Magnetic recording medium
JPS5677926A (en) * 1979-11-28 1981-06-26 Tdk Corp Magnetic recording medium using cobalt adhesion type iron oxide
EP0043882A1 (en) * 1980-07-16 1982-01-20 Kodak-Pathe Magnetic recording element, process for making the same and its use in recording
JPH0721854B2 (ja) * 1981-05-29 1995-03-08 富士写真フイルム株式会社 磁気記録体
JPS5819735A (ja) * 1981-07-25 1983-02-04 Tdk Corp 磁気記録媒体
JPS6057527A (ja) * 1983-09-08 1985-04-03 Fuji Photo Film Co Ltd 磁気記録媒体
KR900000429B1 (ko) * 1984-05-31 1990-01-30 도다 교오교오 가부시끼가이샤 자기 기록용 판상 아철산 바륨입자와 그 제조방법

Also Published As

Publication number Publication date
JPS6042804A (ja) 1985-03-07
EP0135774A3 (en) 1987-04-08
US4693931A (en) 1987-09-15
EP0135774A2 (en) 1985-04-03
DE3480970D1 (de) 1990-02-08
KR920003489B1 (ko) 1992-05-01
JPH0544163B2 (ko) 1993-07-05
EP0135774B1 (en) 1990-01-03

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