Invention Grant
- Patent Title: Magnetic recording medium and method of manufacturing the same
- Patent Title (中): 磁记录介质及其制造方法
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Application No.: US13051765Application Date: 2011-03-18
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Publication No.: US08795858B2Publication Date: 2014-08-05
- Inventor: Masahide Sato , Katsumi Araki , Kazufumi Omura , Tomohiro Ichikawa , Shinji Tsujimoto , Tadahiro Ooishi
- Applicant: Masahide Sato , Katsumi Araki , Kazufumi Omura , Tomohiro Ichikawa , Shinji Tsujimoto , Tadahiro Ooishi
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2010-063524 20100319; JP2011-059997 20110318
- Main IPC: G11B5/716
- IPC: G11B5/716

Abstract:
An aspect of the present invention relates to a magnetic recording medium comprising a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the binder of the magnetic layer is a mixture of a vinyl chloride copolymer, polyurethane resin, and polyisocyanate, the polyurethane resin having a glass transition temperature ranging from 90 to 130° C. and a storage elastic modulus at 80° C. ranging from 2.5 to 5.0 GPa, the nonmagnetic layer is a radiation-cured layer formed by curing with radiation a radiation-curable composition comprising a nonmagnetic powder and a binder component, the binder component comprising a radiation-curable vinyl chloride copolymer and a radiation-curable polyurethane resin, and the radiation-curable vinyl chloride copolymer and radiation-curable polyurethane resin both have glass transition temperatures ranging from 30 to 100° C.
Public/Granted literature
- US20110229741A1 MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME Public/Granted day:2011-09-22
Information query
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