JPS57189359A - Conductive disc type recording carrier - Google Patents
Conductive disc type recording carrierInfo
- 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
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.
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)
| 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 |
-
1981
- 1981-05-15 JP JP7371981A patent/JPS57189359A/en active Pending
Cited By (2)
| 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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