发明授权
US06759150B2 Magnetic recording medium comprising urethane binder of specific Tg
有权
包含特定Tg的聚氨酯粘合剂的磁记录介质
- 专利标题: Magnetic recording medium comprising urethane binder of specific Tg
- 专利标题(中): 包含特定Tg的聚氨酯粘合剂的磁记录介质
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申请号: US10024993申请日: 2001-12-18
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公开(公告)号: US06759150B2公开(公告)日: 2004-07-06
- 发明人: Masaki Suzuki , Hiroaki Takano , Masanosuke Kunikata
- 申请人: Masaki Suzuki , Hiroaki Takano , Masanosuke Kunikata
- 优先权: JPP.2000-383798 20001218
- 主分类号: G11B568
- IPC分类号: G11B568
摘要:
A magnetic recording medium includes: a non-magnetic support; a lower non-magnetic layer; and a magnetic layer containing a ferromagnetic powder and a binder, in this order, wherein the magnetic layer has a coercive force of 2,500 to 3,500 oersted (197.5 to 276.5 kA/m), and a squareness ratio of 0.70 to 0.85 in a length direction thereof, and the binder in the magnetic layer is a urethane resin having a glass transition temperature Tg of 70° C. or higher.
公开/授权文献
- US20020146593A1 Magnetic recording medium 公开/授权日:2002-10-10
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