| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a composite magnetic sheet that is obtained by molding a mixture prepared by dispersing a powder of a soft magnetic material in a matrix composed of rubber or plastics, is useful as an electromagnetic wave absorber, and has high permeability and superior performance. <P>SOLUTION: This composite magnetic sheet having high permeability is manufactured by forming a thin film on the internal surface of a rotating cylinder by putting mixture of flat powder of the soft magnetic material having high permeability and rubber or plastics in the cylinder in a fluidal state like a suspension in an organic solvent. After a coating film is obtained by drying the thin film, the coating film is removed from the cylinder. In the course of manufacturing this magnetic sheet, the stress applied to the soft magnetic material is suppressed to the minimum and, at the same time, the flat powder of the soft magnetic material is oriented by utilizing the centrifugal force generated when the cylinder is rotated. <P>COPYRIGHT: (C)2003,JPO |
