JPS57189359A - Conductive disc type recording carrier - Google Patents

Conductive disc type recording carrier

Info

Publication number
JPS57189359A
JPS57189359A JP7371981A JP7371981A JPS57189359A JP S57189359 A JPS57189359 A JP S57189359A JP 7371981 A JP7371981 A JP 7371981A JP 7371981 A JP7371981 A JP 7371981A JP S57189359 A JPS57189359 A JP S57189359A
Authority
JP
Japan
Prior art keywords
type recording
recording carrier
disc type
conductive
pvc
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.)
Pending
Application number
JP7371981A
Other languages
Japanese (ja)
Inventor
Hideo Hatanaka
Akihiro Okuma
Kazuhisa Morimoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7371981A priority Critical patent/JPS57189359A/en
Publication of JPS57189359A publication Critical patent/JPS57189359A/en
Pending 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 increase thermal deformation temps. and to improve workability in the production of a conductive disc type recording carrier by using a copolymer resin consisting of 99.5-96wt.% PVC and 0.5-4wt.% ethylene as a constituting resin. CONSTITUTION:A PVC-ethylene copolymer contg. 0.5-4wt.% ethylene is used as a disc constituting resin, whereby the production of a conductive disc type recording carrier of superior workability and high thermal deformation temps. is made possible. Carbon black particles are preferable as conductive fine particles to be mixed with the PVC-ethylene copolymer resin, in terms of conductivity, workability and cost. For the amt. of addition of the carbon black as the conductive particles, it is necessary that said carbon is contained at 10-30 pts. wt. in 100 pts.wt. the disc compsn.
JP7371981A 1981-05-15 1981-05-15 Conductive disc type recording carrier Pending JPS57189359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7371981A JPS57189359A (en) 1981-05-15 1981-05-15 Conductive disc type recording carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7371981A JPS57189359A (en) 1981-05-15 1981-05-15 Conductive disc type recording carrier

Publications (1)

Publication Number Publication Date
JPS57189359A true JPS57189359A (en) 1982-11-20

Family

ID=13526308

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7371981A Pending JPS57189359A (en) 1981-05-15 1981-05-15 Conductive disc type recording carrier

Country Status (1)

Country Link
JP (1) JPS57189359A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63146910A (en) * 1986-12-10 1988-06-18 Mitsubishi Plastics Ind Ltd Heat-shrinkable tube
US4830777A (en) * 1983-08-31 1989-05-16 Taiho Kogyo Co., Ltd. Electric conductive and sliding resin material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830777A (en) * 1983-08-31 1989-05-16 Taiho Kogyo Co., Ltd. Electric conductive and sliding resin material
JPS63146910A (en) * 1986-12-10 1988-06-18 Mitsubishi Plastics Ind Ltd Heat-shrinkable tube

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