JPS57150138A - Manufacture for magnetic disc - Google Patents

Manufacture for magnetic disc

Info

Publication number
JPS57150138A
JPS57150138A JP3389481A JP3389481A JPS57150138A JP S57150138 A JPS57150138 A JP S57150138A JP 3389481 A JP3389481 A JP 3389481A JP 3389481 A JP3389481 A JP 3389481A JP S57150138 A JPS57150138 A JP S57150138A
Authority
JP
Japan
Prior art keywords
shaping
drying
manufacture
cyclohexanone
magnetic disc
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.)
Granted
Application number
JP3389481A
Other languages
Japanese (ja)
Other versions
JPH0245245B2 (en
Inventor
Heigo Ishihara
Yoshiki Kato
Masaaki Imamura
Yoichi Kawakubo
Yosuke Seo
Kazuo Yamada
Makoto Oishi
Hajime Fukuya
Fujio Maeda
Yuichi Otani
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.)
Hitachi Ltd
Original Assignee
Hitachi 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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3389481A priority Critical patent/JPH0245245B2/en
Publication of JPS57150138A publication Critical patent/JPS57150138A/en
Publication of JPH0245245B2 publication Critical patent/JPH0245245B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/842—Coating a support with a liquid magnetic dispersion

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To increase sliding strength, by painting a magnetic paint on a disc, making the surface flat by shaping after drying and curing, and further heat- treating the surface. CONSTITUTION:For example, 100pts.wt. gamma-Fe2O3 is dispersed in a solution where 45pts.wt. epoxy resin is dissolved into 230pts.wt. cyclohexanone, and 2.5% vinyl resin and 350pts.wt. cyclohexanone solution are added. This magnetic paint is coated on an Al substrate and cured for >=1hr at 180-220 deg.C after drying. After the surface is made flat by shaping, heat treatment at >=160 deg.C is made again. Thus, the sliding atrength can be increased.
JP3389481A 1981-03-11 1981-03-11 JIKIKIROKUBAITAINOSEIZOHOHO Expired - Lifetime JPH0245245B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3389481A JPH0245245B2 (en) 1981-03-11 1981-03-11 JIKIKIROKUBAITAINOSEIZOHOHO

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3389481A JPH0245245B2 (en) 1981-03-11 1981-03-11 JIKIKIROKUBAITAINOSEIZOHOHO

Publications (2)

Publication Number Publication Date
JPS57150138A true JPS57150138A (en) 1982-09-16
JPH0245245B2 JPH0245245B2 (en) 1990-10-08

Family

ID=12399230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3389481A Expired - Lifetime JPH0245245B2 (en) 1981-03-11 1981-03-11 JIKIKIROKUBAITAINOSEIZOHOHO

Country Status (1)

Country Link
JP (1) JPH0245245B2 (en)

Also Published As

Publication number Publication date
JPH0245245B2 (en) 1990-10-08

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