发明名称 |
Magnetic recording elements, process for making the same and their use in recording. |
摘要 |
Magnetic recording elements having at least one magnetic recording layer containing acicular magnetic particles that have magnetocrystalline anisotropy, shape anisotropy which provides a preferred axis of magnetization and coercivities of at least 450 Oersteds. These particles are dispersed in a binder and form a distribution that imparts an isotropic magnetic response to the magnetic recording layer. A process for preparing the above magnetic recording elements is also disclosed. According to this process, the aforementioned magnetic particles are dispersed in a liquid medium. The dispersion is formed into a magnetic recording layer while establishing a distribution of particles that has spherically symmetrical magnetic properties (symmetry that is three-dimensional). The layer is then solidified while maintaining this distribution. A magnetic recording method is also disclosed. This method involves (1) providing a signal modulated magnetic field by means of a gapped magnetic ring head, (2) subjecting to that field a magnetic recording layer of the type previously described and (3) causing relative motion between the head and the layer.
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申请公布号 |
EP0044258(A2) |
申请公布日期 |
1982.01.20 |
申请号 |
EP19810401126 |
申请日期 |
1981.07.15 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
PINGAUD, BERNARD JEAN;PONCET, CLAUDE |
分类号 |
C09D5/23;G11B5/70;G11B5/706;G11B5/714;G11B5/84;G11B5/842;H01F1/06;(IPC1-7):G11B5/70;H01F1/11 |
主分类号 |
C09D5/23 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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