发明授权
US5069963A Magnetic recording medium with a back coat layer of nitrocellulose and
polyurethane binder resins and which contains carbon black and titanium
dioxide particles
失效
具有尼龙纤维素和聚氨酯粘合剂树脂的背面层的磁性记录介质，其含有炭黑和二氧化钛颗粒
- 专利标题： Magnetic recording medium with a back coat layer of nitrocellulose and polyurethane binder resins and which contains carbon black and titanium dioxide particles
- 专利标题（中）： 具有尼龙纤维素和聚氨酯粘合剂树脂的背面层的磁性记录介质，其含有炭黑和二氧化钛颗粒
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申请号： US575014申请日： 1990-08-30
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公开(公告)号： US5069963A公开(公告)日： 1991-12-03
- 发明人: Hidetoshi Yanai , Akira Ishikawa
- 申请人： Hidetoshi Yanai , Akira Ishikawa
- 申请人地址： JPX Tokyo
- 专利权人： KAO Corporation
- 当前专利权人： KAO Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX1-229077 19890904
- 主分类号： C09D5/23
- IPC分类号： C09D5/23 ; C09C1/48 ; C09D7/12 ; C09D101/18 ; C09D175/00 ; C09D175/04 ; G11B5/73 ; G11B5/735
摘要：
A magnetic recording medium for use in a belt-driven cartridge is disclosed, which comprises a non-magnetic support provided a magnetic layer on the principal surface thereof and a back coat layer on the opposite surface thereof, wherein a back coat layer containing (a) a carbon black having a mean grain diameter of 20 to 100 nm; (b) a titanium oxide having a mean grain diameter of 100 to 600 nm; and (c) a binder consisting essentially of a pyroxylin and a polyurethane resin, provided that the weight proportion of component (a) to component (b) is in the range of 99:1 to 60:40, the weight proportion of the sum of component (a) and component (b) to component (c) is in the range of 70:30 to 20:80, and the weight proportion of the pyroxylin to the polyurethane resin in said component (c) is in the range of 10:90 to 90:10.
公开/授权文献
- US5610119A Thermal transfer image receiving sheet 公开/授权日：1997-03-11
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