MAGNETIC TAPE AND METHOD OF MANUFACTURING THE SAME
First Claim
1. A magnetic tape,which comprises a magnetic layer comprising ferromagnetic powder and binder on one surface of a nonmagnetic support, and comprises a backcoat layer comprising nonmagnetic powder and binder on the other surface of the nonmagnetic support,wherein the magnetic layer comprises one or more components selected from the group consisting of a fatty acid and a fatty acid amide;
- the backcoat layer has a thickness of less than or equal to 0.30 μ
m and comprises one or more components selected from the group consisting of a fatty acid and a fatty acid amide;
a C—
H derived carbon, C, concentration calculated from a C—
H peak area ratio in a C1s spectrum obtained by X-ray photoelectron spectroscopy conducted at a photoelectron take-off angle of 10 degrees on a surface on the magnetic layer side of the magnetic tape, referred to as a magnetic layer side C—
H derived C concentration, is greater than or equal to 45 atom %; and
a C—
H derived carbon, C, concentration calculated from a C—
H peak area ratio in a C1s spectrum obtained by X-ray photoelectron spectroscopy conducted at a photoelectron take-off angle of 10 degrees on a surface on the backcoat layer side of the magnetic tape, referred to as a backcoat layer side C—
H derived C concentration, is greater than or equal to 35 atom %.
1 Assignment
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Accused Products
Abstract
The magnetic tape has a magnetic layer containing ferromagnetic powder and binder on one surface of a nonmagnetic support, and has a backcoat layer containing nonmagnetic powder and binder on the other surface thereof, wherein the magnetic layer contains one or more components selected from the group consisting of a fatty acid and a fatty acid amide; the backcoat layer has a thickness of less than or equal to 0.30 μm and contains one or more components selected from the group consisting of a fatty acid and a fatty acid amide; a magnetic layer side C—H derived C concentration is greater than or equal to 45 atom %; and a backcoat layer side C—H derived C concentration is greater than or equal to 35 atom %.
119 Citations
16 Claims
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1. A magnetic tape,
which comprises a magnetic layer comprising ferromagnetic powder and binder on one surface of a nonmagnetic support, and comprises a backcoat layer comprising nonmagnetic powder and binder on the other surface of the nonmagnetic support, wherein the magnetic layer comprises one or more components selected from the group consisting of a fatty acid and a fatty acid amide; -
the backcoat layer has a thickness of less than or equal to 0.30 μ
m and comprises one or more components selected from the group consisting of a fatty acid and a fatty acid amide;a C—
H derived carbon, C, concentration calculated from a C—
H peak area ratio in a C1s spectrum obtained by X-ray photoelectron spectroscopy conducted at a photoelectron take-off angle of 10 degrees on a surface on the magnetic layer side of the magnetic tape, referred to as a magnetic layer side C—
H derived C concentration, is greater than or equal to 45 atom %; anda C—
H derived carbon, C, concentration calculated from a C—
H peak area ratio in a C1s spectrum obtained by X-ray photoelectron spectroscopy conducted at a photoelectron take-off angle of 10 degrees on a surface on the backcoat layer side of the magnetic tape, referred to as a backcoat layer side C—
H derived C concentration, is greater than or equal to 35 atom %. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of manufacturing a magnetic tape,
wherein the magnetic tape comprises a magnetic layer comprising ferromagnetic powder and binder on one surface of a nonmagnetic support, comprises a nonmagnetic layer comprising nonmagnetic powder and binder between the magnetic layer and the nonmagnetic support, and comprises a backcoat layer comprising nonmagnetic powder and binder on the other surface of the nonmagnetic support, wherein the magnetic layer comprises one or more components selected from the group consisting of a fatty acid and a fatty acid amide; -
the backcoat layer has a thickness of less than or equal to 0.30 μ
m and comprises one or more components selected from the group consisting of a fatty acid and a fatty acid amide;a C—
H derived carbon, C, concentration calculated from a C—
H peak area ratio in a C1s spectrum obtained by X-ray photoelectron spectroscopy conducted at a photoelectron take-off angle of 10 degrees on a surface on the magnetic layer side of the magnetic tape, referred to as a magnetic layer side C—
H derived C concentration, is greater than or equal to 45 atom %; anda C—
H derived carbon, C, concentration calculated from a C—
H peak area ratio in a C1s spectrum obtained by X-ray photoelectron spectroscopy conducted at a photoelectron take-off angle of 10 degrees on a surface on the backcoat layer side of the magnetic tape, referred to as a backcoat layer side C—
H derived C concentration, is greater than or equal to 35 atom %; andthe method comprises formation of a nonmagnetic layer, formation of a magnetic layer, and formation of a backcoat layer;
whereinthe formation of a nonmagnetic layer further comprises; coating a nonmagnetic layer-forming composition comprising one or more components selected from the group consisting of a fatty acid and a fatty acid amide, nonmagnetic powder, binder, and solvent on a surface of a nonmagnetic support to form a coating layer; heating and drying the coating layer by a heat treatment; and cooling the coating layer after the coating but prior to the heating and drying; and the formation of a backcoat layer further comprises; coating a backcoat layer-forming composition comprising one or more components selected from the group consisting of a fatty acid and a fatty acid amide, nonmagnetic powder, binder, and solvent on a surface of a nonmagnetic support to form a coating layer; heating and drying the coating layer by a heat treatment; and cooling the coating layer after the coating but prior to the heating and drying. - View Dependent Claims (13, 14, 15, 16)
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Specification