DE69311017T2 - Nicht magnetische Teilchen - Google Patents

Nicht magnetische Teilchen

Info

Publication number
DE69311017T2
DE69311017T2 DE69311017T DE69311017T DE69311017T2 DE 69311017 T2 DE69311017 T2 DE 69311017T2 DE 69311017 T DE69311017 T DE 69311017T DE 69311017 T DE69311017 T DE 69311017T DE 69311017 T2 DE69311017 T2 DE 69311017T2
Authority
DE
Germany
Prior art keywords
magnetic particles
particles
magnetic
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 - Fee Related
Application number
DE69311017T
Other languages
English (en)
Other versions
DE69311017D1 (de
Inventor
Kazuyuki Hayashi
Keisuke Iwasaki
Yasuyuki Tanaka
Minoru Oshugi
Toshiharu Harada
Masaru Isoai
Kazushi Takama
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.)
Toda Kogyo Corp
Original Assignee
Toda Kogyo Corp
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 Toda Kogyo Corp filed Critical Toda Kogyo Corp
Publication of DE69311017D1 publication Critical patent/DE69311017D1/de
Application granted granted Critical
Publication of DE69311017T2 publication Critical patent/DE69311017T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B5/733—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
    • 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
    • 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
    • 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
    • Y10T428/257—Iron oxide or aluminum oxide
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less
DE69311017T 1992-08-07 1993-08-04 Nicht magnetische Teilchen Expired - Fee Related DE69311017T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4232959A JP2872227B2 (ja) 1992-08-07 1992-08-07 磁気記録媒体用下地層

Publications (2)

Publication Number Publication Date
DE69311017D1 DE69311017D1 (de) 1997-07-03
DE69311017T2 true DE69311017T2 (de) 1997-09-04

Family

ID=16947555

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69311017T Expired - Fee Related DE69311017T2 (de) 1992-08-07 1993-08-04 Nicht magnetische Teilchen

Country Status (4)

Country Link
US (1) US5587232A (de)
EP (1) EP0582472B1 (de)
JP (1) JP2872227B2 (de)
DE (1) DE69311017T2 (de)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3486793B2 (ja) * 1995-02-20 2004-01-13 コニカミノルタホールディングス株式会社 磁気記録媒体
CA2215259A1 (en) * 1995-03-27 1996-10-03 August Lehner Magnetic recording media
JPH0935245A (ja) * 1995-07-19 1997-02-07 Sony Corp 磁気記録媒体
JPH09106533A (ja) * 1995-10-06 1997-04-22 Sony Corp 磁気記録媒体
KR970023005A (ko) * 1995-10-20 1997-05-30 토다 토시유끼 자기기록매체용 비자성 하도층용 헤마타이트 입자, 그의 제조방법, 비자성 하도층 및 자기기록매체
JP3666688B2 (ja) * 1996-02-23 2005-06-29 富士写真フイルム株式会社 磁気記録媒体
US6040043A (en) * 1996-03-21 2000-03-21 Dowa Mining Co., Ltd. Particles for lower layer of coating type magnetic recording medium
EP0823399B1 (de) * 1996-08-09 2000-11-15 Toda Kogyo Corporation Rechteckige, parallelopipedale Lepidokrokitteilchen und Verfahren zu ihrer Herstellung
EP0825235B1 (de) * 1996-08-19 2002-12-11 Toda Kogyo Corporation Nicht-magnetische schwarze Teilchen und deren Verwendung als Pigmente oder Füllstoffe
JPH1069629A (ja) * 1996-08-27 1998-03-10 Dowa Mining Co Ltd 重層構造の塗布型磁気記録媒体
JPH10124851A (ja) * 1996-10-15 1998-05-15 Sony Corp 磁気記録媒体
JPH10157024A (ja) * 1996-11-29 1998-06-16 Teijin Ltd 積層フイルム
JPH10241148A (ja) * 1997-02-28 1998-09-11 Toda Kogyo Corp 磁気記録媒体
US6063490A (en) * 1997-08-19 2000-05-16 Toda Kogyo Corporation Magnetic recording medium comprising non-magnetic acicular particles containing mainly iron and having titanium dispersed therein
US6420030B1 (en) 1997-10-31 2002-07-16 Toda Kogyo Corporation Black iron-based composite particles, process for producing the same, paint and rubber or resin composition containing the same
US6124022A (en) * 1997-11-26 2000-09-26 Toda Kogyo Corporation Acicular hematite particles for non-magnetic undercoat layer of magnetic recording medium, and magnetic recording medium using the same
US6287668B1 (en) 1997-12-12 2001-09-11 Toda Kogyo Corporation Magnetic recording medium and substrate therefor
EP0924690B1 (de) * 1997-12-12 2003-05-07 Toda Kogyo Corporation Magnetisches Aufzeichnungsmedium und Substrat dafür
US6352776B1 (en) 1997-12-12 2002-03-05 Toda Kogyo Corporation Magnetic recording medium, non-magnetic acicular black iron-based composite particles and process for producing the particles
DE69907795T2 (de) * 1998-03-26 2004-04-01 Toda Kogyo Corp. Schwarze nicht-magnetische zusammengesetzte Teilchen für schwarze Toner und schwarze Toner, worin sie eingesetzt werden
JP2001117283A (ja) * 1999-08-11 2001-04-27 Toda Kogyo Corp 高抵抗黒色トナー用黒色非磁性粒子粉末及び該黒色非磁性粒子粉末を用いた高抵抗黒色トナー
CN1182517C (zh) 1998-12-18 2004-12-29 同和矿业株式会社 用于涂敷型磁记录介质底层的粉末及其生产方法
EP1492089B1 (de) 2002-04-03 2007-06-06 Dowa Mining Co., Ltd. Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps und magnetisches aufzeichnungsmedium damit
WO2003088218A1 (fr) * 2002-04-03 2003-10-23 Dowa Mining Co., Ltd. Poudre pour sous-couche de support d'enregistrement magnetique de type enrobage
JP5095909B2 (ja) * 2003-06-24 2012-12-12 ローム・アンド・ハース・エレクトロニック・マテリアルズ，エル．エル．シー． 触媒組成物および析出方法
ATE408219T1 (de) * 2003-07-04 2008-09-15 Dowa Electronics Materials Co Pulver für die untere schicht des anwendungstyps eines geschichteten magnetischen aufzeichnungsmediums und magnetisches aufzeichnungsmedium damit
US7641990B2 (en) 2005-06-27 2010-01-05 Dowa Electronics Materials Co., Ltd. Iron compound particles and magnetic recording medium using same
JP5057042B2 (ja) * 2007-05-23 2012-10-24 戸田工業株式会社 磁気記録媒体の非磁性下地層用非磁性粒子粉末、及び磁気記録媒体
CN117772172B (zh) * 2024-02-23 2024-05-03 山西安仑化工有限公司 一种氧化钛/磁性炭黑催化材料的制备方法和制备装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240847B2 (de) * 1972-10-05 1977-10-14
JPS62295217A (ja) * 1986-06-13 1987-12-22 Hitachi Maxell Ltd 磁気記録媒体
JPS6348612A (ja) * 1986-08-15 1988-03-01 Hitachi Ltd 磁気記録媒体
JPH0693297B2 (ja) * 1987-01-30 1994-11-16 富士写真フイルム株式会社 磁気記録媒体
JP2641051B2 (ja) * 1987-10-19 1997-08-13 富士写真フイルム株式会社 磁気テープ
US5089317A (en) * 1989-01-20 1992-02-18 Fuji Photo Film Co, Ltd. Magnetic recording medium
JP2621565B2 (ja) * 1990-04-11 1997-06-18 松下電器産業株式会社 磁気記録媒体
JPH04167225A (ja) * 1990-10-31 1992-06-15 Victor Co Of Japan Ltd 磁気記録媒体
JP2623178B2 (ja) * 1991-04-25 1997-06-25 富士写真フイルム株式会社 磁気記録媒体

Also Published As

Publication number Publication date
DE69311017D1 (de) 1997-07-03
EP0582472A1 (de) 1994-02-09
US5587232A (en) 1996-12-24
JPH0660362A (ja) 1994-03-04
EP0582472B1 (de) 1997-05-28
JP2872227B2 (ja) 1999-03-17

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee