초록 ▼

A recording medium comprising a magnetic material inside, and having a Taber abrasion amount of 10 mg or less. Also provided is a recording medium comprising a magnetic material inside, and having, in an environment of 23° C. and 50% RH, a surface electroresistivity of 1×109 Ω/sq to 2×1011 Ω/sq and

A recording medium comprising a magnetic material inside, and having a Taber abrasion amount of 10 mg or less. Also provided is a recording medium comprising a magnetic material inside, and having, in an environment of 23° C. and 50% RH, a surface electroresistivity of 1×109 Ω/sq to 2×1011 Ω/sq and a volume electroresistivity of 1×1010 Ωcm to 2×1012 Ωcm.

대표청구항 ▼

1. A recording medium comprising a substrate, a magnetic material inside the substrate, and a surface layer on the substrate, and having wherein the Taber abrasion amount of the recording medium is about 10 mg or less;wherein the magnetic material has a Fe—Co—Si-based amorphous magnetic material as

1. A recording medium comprising a substrate, a magnetic material inside the substrate, and a surface layer on the substrate, and having wherein the Taber abrasion amount of the recording medium is about 10 mg or less;wherein the magnetic material has a Fe—Co—Si-based amorphous magnetic material as its basic component, and the substrate comprises a fiber obtained byi) impregnating a pulp fiber with a synthetic resin, orii) thermally fusing a synthetic resin into a pulp fiber, wherein the synthetic resin is selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride and polyester; and the surface layer has a dry mass of about 0.8 to 3.0 g/m2 containing a material selected from the group consisting of a polyvinyl alcohol having a saponification degree of about 90 mol % or more, a modified polyvinyl alcohol, a styrene-anhydrous maleic acid copolymer, a vinyl chloride-vinyl acetate copolymer, a styrene-butadiene copolymer, and a polyacrylic acid ester. 2. The recording medium of claim 1, wherein the internal bond strength of the recording medium is about 0.1 N·m or more. 3. The recording medium of claim 1, wherein the magnetic material exhibits a large Barkhausen effect. 4. The recording medium of claim 3, wherein the magnetic material is in the shape of a wire having a diameter of about 10 μm or more. 5. The recording medium of claim 4, wherein the length of the magnetic material is from about 5 mm to about 430 mm. 6. The recording medium of claim 4, wherein the diameter of the magnetic material is from about 10 μm to about 40 μm. 7. The recording medium of claim 1, wherein an amount of a filler relative to a solid content of the substrate of the recording medium is about 10% by mass or less. 8. A recording medium comprising a magnetic material, a substrate and a surface layer on the substrate, wherein the Taber abrasion amount of the recording medium is about 10 mg or less, and, in an environment of 23° C. and 50% RH, the surface electroresistivity of the recording medium is about 1×109 Ω/sq to 2×1011 Ω/sq and the volume electroresistivity of the recording medium is about 1×1010 Ωcm to 2×1012 Ωcm; wherein the magnetic material has a Fe—Co—Si-based amorphous magnetic material as its basic component, and the substrate comprises a fiber obtained byi) impregnating a pulp fiber with a synthetic resin, orii) thermally fusing a synthetic resin into a pulp fiber, wherein the synthetic resin is selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride and polyester; and the surface layer is a surface layer with a dry mass of about 0.8 to 3.0 g/m2 containing a material selected from the group consisting of a polyvinyl alcohol having a saponification degree of about 90 mol % or more, a modified polyvinyl alcohol, a styrene-anhydrous maleic acid copolymer, a vinyl chloride-vinyl acetate copolymer, a styrene-butadiene copolymer, and a polyacrylic acid ester. 9. The recording medium of claim 8, wherein an average value RAVE of the surface electroresistivity over the entire surface region of a body of the recording medium, and a surface electroresistivity R1 of a surface of a region of the body of the recording medium that contains the magnetic material have a relationship expressed by the following formula (1): |Log(R1)−Log(RAVE)|≦1. 10. The recording medium of claim 8, wherein a conditioning moisture content in an environment of 23° C. and 50% RH is from about 5.5% to about 7.5%. 11. The recording medium of claim 8, wherein the magnetic material exhibits a large Barkhausen effect. 12. The recording medium of claim 11, wherein the magnetic material is in the shape of a wire having a diameter of about 10 μm or more. 13. The recording medium of claim 12, wherein the length of the magnetic material is from about 5 mm to about 430 mm. 14. The recording medium of claim 12, wherein the diameter of the magnetic material is from about 10 μm to about 60 μm. 15. The recording medium of claim 8, wherein the substrate comprises a pair of substrate sheets and the magnetic material is sandwiched between the pair of substrate sheets. 16. The recording medium of claim 8, wherein the recording medium is produced by papermaking from paper stock and the magnetic material.