JPS57167151A - Recording medium - Google Patents

Recording medium

Info

Publication number
JPS57167151A
JPS57167151A JP4940481A JP4940481A JPS57167151A JP S57167151 A JPS57167151 A JP S57167151A JP 4940481 A JP4940481 A JP 4940481A JP 4940481 A JP4940481 A JP 4940481A JP S57167151 A JPS57167151 A JP S57167151A
Authority
JP
Japan
Prior art keywords
recording medium
charged
carbon black
resin containing
inorganic salt
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
JP4940481A
Other languages
Japanese (ja)
Other versions
JPH0127495B2 (en
Inventor
Akira Nishizawa
Toshiichi Goshima
Yoshiki Nishihara
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP4940481A priority Critical patent/JPS57167151A/en
Publication of JPS57167151A publication Critical patent/JPS57167151A/en
Publication of JPH0127495B2 publication Critical patent/JPH0127495B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
    • G11B9/061—Record carriers characterised by their structure or form or by the selection of the material; Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B9/063—Record carriers characterised by their structure or form or by the selection of the material; Apparatus or processes specially adapted for the manufacture of record carriers characterised by the selection of the material
    • G11B9/068—Moulding resin compositions

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To prevent picture defects or the like for reproducing even if a recording medium is placed in the atmosphere of a high humidity, by allowing the recording medium, which is formed with a resin containing a conductive sub- stance, not to include practically the inorganic salt of an alkali metal or the like. CONSTITUTION:A recordong medium formed with a resin containing a conductive substance does not include practically the inorganic salt of an alkali metal and an alkaline earth metal. For example, carbon black and ion exchange water are charged into a tank 1 and are agitated sufficiently, and moisture is eliminat- ed in a certain degree by a cake press machine and vacuum drier 2, and this material is dried up to about <=2% moisture contents by a driver 3 to obtain carbon black which does not include the alkali metallic salt or the like. A prescribed quantity of this cargon black is charged into a high-speed atitater 5 through a measuring equipment 4 and is mixed sufficiently with recording medium materials such as vinyl chloride resin, and an electrostatic capacity type video disc is produced through a prescribed process.
JP4940481A 1981-04-03 1981-04-03 Recording medium Granted JPS57167151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4940481A JPS57167151A (en) 1981-04-03 1981-04-03 Recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4940481A JPS57167151A (en) 1981-04-03 1981-04-03 Recording medium

Publications (2)

Publication Number Publication Date
JPS57167151A true JPS57167151A (en) 1982-10-14
JPH0127495B2 JPH0127495B2 (en) 1989-05-29

Family

ID=12830102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4940481A Granted JPS57167151A (en) 1981-04-03 1981-04-03 Recording medium

Country Status (1)

Country Link
JP (1) JPS57167151A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57172555A (en) * 1981-04-17 1982-10-23 Matsushita Electric Ind Co Ltd Disk type recording medium and its manufacture
US4906499A (en) * 1984-11-02 1990-03-06 Victor Company Of Japan, Ltd. High density information record medium comprising a polymer material having a lubricant uniformly dispersed therein

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5742087B2 (en) 2008-08-29 2015-07-01 オイレス工業株式会社 MULTILAYER SLIDING MEMBER AND RACK GUIDE IN AUTOMOTIVE RACK AND PINION STEADING DEVICE USING THE SAME
JP6649695B2 (en) 2015-04-24 2020-02-19 オイレス工業株式会社 Multilayer sliding member and rack-and-pinion steering apparatus for automobile using the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5683854A (en) * 1979-11-07 1981-07-08 Rca Corp Production of video disk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5683854A (en) * 1979-11-07 1981-07-08 Rca Corp Production of video disk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57172555A (en) * 1981-04-17 1982-10-23 Matsushita Electric Ind Co Ltd Disk type recording medium and its manufacture
US4906499A (en) * 1984-11-02 1990-03-06 Victor Company Of Japan, Ltd. High density information record medium comprising a polymer material having a lubricant uniformly dispersed therein

Also Published As

Publication number Publication date
JPH0127495B2 (en) 1989-05-29

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