MAGNETIC TAPE AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING DEVICE
First Claim
1. A magnetic tape comprising a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, whereinthe ferromagnetic powder is a hexagonal ferrite powder,squareness in a vertical direction without demagnetizing field correction of the magnetic layer ranges from 0.6 to 1.0, andthe magnetic layer further comprises a compound in which a substituent selected from the group consisting of a carboxyl group and a hydroxyl group is directly substituted into a ring structure comprising a double bond and having a ClogP falling within a range of 2.3 to 5.5.
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Accused Products
Abstract
An aspect of the present invention relates to a magnetic tape comprising a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein
- the ferromagnetic powder is a hexagonal ferrite powder,
- squareness in a vertical direction without demagnetizing field correction of the magnetic layer ranges from 0.6 to 1.0, and
- the magnetic layer further comprises a compound in which a substituent selected from the group consisting of a carboxyl group and a hydroxyl group is directly substituted into a ring structure comprising a double bond and having a ClogP falling within a range of 2.3 to 5.5.
112 Citations
11 Claims
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1. A magnetic tape comprising a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein
the ferromagnetic powder is a hexagonal ferrite powder, squareness in a vertical direction without demagnetizing field correction of the magnetic layer ranges from 0.6 to 1.0, and the magnetic layer further comprises a compound in which a substituent selected from the group consisting of a carboxyl group and a hydroxyl group is directly substituted into a ring structure comprising a double bond and having a ClogP falling within a range of 2.3 to 5.5.
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9. A method of manufacturing a magnetic tape, which comprises:
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preparing a coating liquid by dispersing a magnetic liquid containing a hexagonal ferrite powder, a binder, and a compound in which a substituent selected from the group consisting of a carboxyl group and a hydroxyl group is directly substituted into a ring structure comprising a double bond and having a ClogP falling within a range of 2.3 to 5.5, forming a magnetic layer by coating the coating liquid that has been prepared on a nonmagnetic support, and adjusting squareness in a vertical direction without demagnetizing field correction of the magnetic layer to within a range of 0.6 to 1.0 by implementing vertical orientation processing, to manufacture a magnetic tape comprising a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein the ferromagnetic powder is a hexagonal ferrite powder, squareness in a vertical direction without demagnetizing field correction of the magnetic layer ranges from 0.6 to 1.0, and the magnetic layer further comprises a compound in which a substituent selected from the group consisting of a carboxyl group and a hydroxyl group is directly substituted into a ring structure comprising a double bond and having a ClogP falling within a range of 2.3 to 5.5. - View Dependent Claims (10)
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Specification