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KR880004441A - Magnetic recording media - Google Patents

Magnetic recording media Download PDF

Info

Publication number
KR880004441A
KR880004441A KR870009725A KR870009725A KR880004441A KR 880004441 A KR880004441 A KR 880004441A KR 870009725 A KR870009725 A KR 870009725A KR 870009725 A KR870009725 A KR 870009725A KR 880004441 A KR880004441 A KR 880004441A
Authority
KR
South Korea
Prior art keywords
less
magnetic recording
recording media
thickness
film
Prior art date
Application number
KR870009725A
Other languages
Korean (ko)
Other versions
KR910008464B1 (en
Inventor
다까시 후지와라
시게미쓰 무라오까
Original Assignee
에리 마사요시
아사히가세이고오교 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
Application filed by 에리 마사요시, 아사히가세이고오교 가부시끼가이샤 filed Critical 에리 마사요시
Publication of KR880004441A publication Critical patent/KR880004441A/en
Application granted granted Critical
Publication of KR910008464B1 publication Critical patent/KR910008464B1/en

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
    • 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
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/667—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers including a soft magnetic layer
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • 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

Landscapes

  • Magnetic Record Carriers (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

내용 없음No content

Description

자기 기록매체Magnetic recording media

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (1)

필름면에 평행한 임의의 방향의 영율이 1000㎏/㎟ 이상, 연신도가 10% 이상, 흡습팽창계수가 3 X 10-5㎜/㎜/%RH 이하, 250℃의 가열수축율이 0.2% 이하이고, 적어도 1표면의 중심선 평균조도(Ra)가 0.5㎛이하이고, 그리고 8㎛ 이하의 두께의 폴리 -P-페닐렌텔레프탈아미드로써 실질적으로 되는 필름상에 자성층을 형성하여서 됨을 특징으로 하는 자기기록매체Young's modulus in any direction parallel to the film plane is 1000 kg / mm 2 or more, elongation is 10% or more, moisture absorption expansion coefficient is 3 × 10 -5 mm / mm /% RH or less, and heat shrinkage at 250 ° C. is 0.2% or less Magnetic field formed by forming a magnetic layer on a film which is substantially made of poly-P-phenylenetephthalamide having a thickness of at least one surface with a centerline average roughness Ra of 0.5 µm or less and a thickness of 8 µm or less. Record carrier ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is to be disclosed based on the initial application.
KR1019870009725A 1986-09-03 1987-09-02 Magnetic recording medium KR910008464B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP205887 1986-09-03
JP86-205887 1986-09-03
JP20588786 1986-09-03

Publications (2)

Publication Number Publication Date
KR880004441A true KR880004441A (en) 1988-06-04
KR910008464B1 KR910008464B1 (en) 1991-10-15

Family

ID=16514374

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870009725A KR910008464B1 (en) 1986-09-03 1987-09-02 Magnetic recording medium

Country Status (2)

Country Link
JP (1) JP2643171B2 (en)
KR (1) KR910008464B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0825221B2 (en) * 1991-03-27 1996-03-13 東レ株式会社 Base film for magnetic recording media
JP2616711B2 (en) 1994-09-14 1997-06-04 東レ株式会社 Magnetic recording media

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0668822B2 (en) * 1986-09-03 1994-08-31 旭化成工業株式会社 Perpendicular magnetic recording medium

Also Published As

Publication number Publication date
JP2643171B2 (en) 1997-08-20
JPS63183613A (en) 1988-07-29
KR910008464B1 (en) 1991-10-15

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E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
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FPAY Annual fee payment

Payment date: 20011010

Year of fee payment: 11

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