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公开(公告)号：US4735844A
公开(公告)日：1988-04-05
申请号：US726974
申请日：1985-04-25
IPC分类号： C10M107/50 , C09D4/00 , C09D5/23 , C09D127/04 , C09D127/06 , C09D167/06 , C09D175/00 , C09D175/04 , C09D175/08 , C10N40/18 , G11B5/64 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/24355 , Y10T428/25
摘要： A magnetic recording medium comprising a non-magnetic substrate, a magnetic recording layer formed on one side of the substrate and a back coating layer formed on the other side of the substrate, characterized in that the back coating layer is a radiation-cured coating layer containing a fine particulate pigment having an average particle size of the primary particles of at most 50 m.mu.m and a specific surface area of at least 35 m.sup.2 /g as measured by BET method.
摘要翻译： 一种磁记录介质，包括非磁性基板，形成在所述基板的一侧上的磁记录层和形成在所述基板的另一侧上的背涂层，其特征在于，所述背涂层是辐射固化涂层 含有通过BET法测定的一次粒子的平均粒径为50μm以下，比表面积为35m 2 / g以上的细颗粒颜料。
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公开(公告)号：US4741954A
公开(公告)日：1988-05-03
申请号：US746317
申请日：1985-06-19
IPC分类号： G11B5/66 , C09D4/00 , C09D5/23 , C09D127/04 , C09D127/06 , C09D167/06 , C09D175/04 , C09D175/14 , C10M107/50 , C10N40/18 , G11B5/64 , G11B5/708 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/708 , Y10T428/25 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium comprising a non-magnetic substrate, a magnetic recording layer formed on one side of the substrate and a back coating layer formed on the other side of the substrate, wherein the back coating layer contains an inorganic pigment having a Mohs hardness of at least 5 and carbon black, and the inorganic pigment is in an amount of at most 1/9 by weight relative to the carbon black.
摘要翻译： 一种磁记录介质，包括非磁性基板，形成在所述基板的一侧的磁记录层和形成在所述基板的另一侧上的背涂层，其中所述背涂层含有莫氏硬度为 至少5和炭黑，并且无机颜料的量相对于炭黑为至多1/9。
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公开(公告)号：US4699819A
公开(公告)日：1987-10-13
申请号：US757295
申请日：1985-07-22
CPC分类号： G11B5/735 , G11B5/70 , Y10S428/90 , Y10T428/24355 , Y10T428/25
摘要： A magnetic recording medium comprising a non-magnetic substrate, a magnetic recording layer formed on one side of the substrate and a back coating layer formed on the other side of the substrate, wherein said back coating layer contains graphitized carbon black having an average particle size of from 10 to 50 m.mu.m as measured by an electron microscope.
摘要翻译： 一种磁记录介质，其特征在于，包括非磁性基板，形成在所述基板一侧的磁记录层和在所述基板的另一侧上形成的背涂层，其中所述背涂层含有平均粒径 通过电子显微镜测量为10至50μm。
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公开(公告)号：US4629646A
公开(公告)日：1986-12-16
申请号：US753779
申请日：1985-07-11
IPC分类号： C10M107/50 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , C10N40/18 , G11B5/64 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/24372 , Y10T428/24413 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/30
摘要： A magnetic recording medium comprising a non-magnetic substrate, a magnetic recording layer formed on one side of the substrate and a back coating layer formed on the other side of the substrate, characterized in that the back coating layer contains carbon black having an ash content of at most 0.05%, a specific surface area of from 20 to 350 m.sup.2 /g, an oil absorption of at most 200 ml/100 g and an average particle size of from 13 to 60 m.mu.m.
摘要翻译： 一种磁记录介质，包括非磁性基板，形成在基板的一侧的磁记录层和形成在该基板的另一侧上的背涂层，其特征在于，所述背涂层含有具有灰分含量的炭黑 至多0.05％，比表面积为20至350m 2 / g，吸油量至多为200ml / 100g，平均粒度为13至60μm。
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