Apparatus for calendering magnetic recording medium
US6319624A · kind A · utility
3Cited by
15References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1998 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Feb 17, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2933
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In the resin roll 5 for calendering a magnetic recording medium, a surface portion 3a of a thermosetting resin outer layer 3 has high storage elastic modulus (E') of 5.times.10.sup.10 to 5.times.10.sup.11 dyn/cm.sup.2 at a temperature of 50.degree. to 150.degree. C. at a frequency of 10 hertz (Hz). At the surface portion of the thermosetting resin outer layer, the expression representing the relation between storage elastic modulus (E') and the Poisson's ratio (.nu.) is within the following range, under the same conditions: EQU 2.times.10.sup.-12 cm.sup.2 /dyn<(1-.nu..sup.2)/E'<2.times.10.sup.-11 cm.sup.2 /dyn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.