Title:
ERASABLE OPTICAL RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPS595447
Kind Code:
A
Abstract:
Provided is an erasable recording medium and a method for recording and erasing same. The erasable recording medium comprises a thermally stable substrate and a polymeric layer deposited on the substrate comprised of a polymer exhibiting: (i) a Vicat softening point of from about 45 to 120 DEG C; (ii) a surface tension in dynes/cm and a melt viscosity in poise in the temperature range of from about 140 DEG to 200 DEG C such that the ratio of said surface tension to melt viscosity at some point within said temperature range is at least 2:1; and (iii) a temperature for the onset of thermal degradation of at least 250 DEG C. The recording medium has excellent dimensional and mechanical stability on storage, readily and easily records information and yet has an ability to be easily and completely erased when erasure is desired.
Inventors:
JIEEMUZU II KUUDAA
ANSONII JIEI IISUTO
ANSONII JIEI IISUTO
Application Number:
JP10947183A
Publication Date:
January 12, 1984
Filing Date:
June 20, 1983
Export Citation:
Assignee:
CELANESE CORP
International Classes:
B41M5/26; G03C1/73; G11B7/24; G11B7/244; G11B7/245; G11B7/246; G11B7/2531; (IPC1-7): B41M5/26; G03C1/72; G11B7/24; G11C13/04
Domestic Patent References:
| JPS55161690A | 1980-12-16 | |||
| JPS51126148A | 1976-11-04 | |||
| JPS4965725A | 1974-06-26 | |||
| JPS5848245A | 1983-03-22 | |||
| JPS5868252A | 1983-04-23 | |||
| JPS58109472A | 1983-06-29 |
Attorney, Agent or Firm:
Hirose Shoichi
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