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公开(公告)号：US4591528A
公开(公告)日：1986-05-27
申请号：US636502
申请日：1984-08-01
CPC分类号： G11B5/714 , G11B5/735 , Y10S428/90 , Y10T428/24942 , Y10T428/25 , Y10T428/256 , Y10T428/30
摘要： A magnetic recording medium comprising a plastic base film, a magnetic layer formed on one side of the base film and composed of a ferromagnetic alloy powder dispersed in a resin binder, and a backing layer formed on the other side of the base film, characterized in that said ferromagnetic alloy powder has a surface area of at least 48 m.sup.2 /g as measured by BET method, said magnetic layer has a coercive force of at least 1,000 Oe and a surface roughness of at most 0.08 .mu.m, and said backing layer is composed essentially of a thermoset or radiation-cured resin and carbon black dispersed in the resin, and has a surface roughness of from 0.05 to 0.6 .mu.m, said carbon black having an average particle size of from 10 to 60 .mu.m as measured by an electron microscope.
摘要翻译： 一种磁记录介质，包括塑料基膜，形成在基膜的一侧上并由分散在树脂粘合剂中的铁磁性合金粉末构成的磁性层和形成在基膜另一侧的背衬层的磁性层，其特征在于， 所述铁磁合金粉末通过BET法测定的表面积为至少48m 2 / g，所述磁性层的矫顽力为至少1000Oe，表面粗糙度为0.08μm以下，所述背衬层为 基本上由分散在树脂中的热固性或辐射固化树脂和炭黑组成，并且具有0.05至0.6μm的表面粗糙度，所述炭黑的平均粒度为10至60μm，通过 电子显微镜。
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2.发明授权
公开(公告)号：US4946729A
公开(公告)日：1990-08-07
申请号：US654364
申请日：1984-09-26
IPC分类号： C08G18/62 , C08G18/67 , C09D4/00 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/64 , G11B5/73 , G11B5/735
CPC分类号： G11B5/735 , C08G18/6212 , C08G18/672 , C09D4/00 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/31609
摘要： A back coating resin composition for a magnetic recording medium comprising:(A) a plastic compound having a molecular weight of from 5,000 to 100,000 and containing at least two radiation-curable unsaturated double bonds;(B) a rubber-like compound having a molecular weight of from 3,000 to 100,000 and containing at least one radiation-curable unsaturated double bond or containing no such double bond; and(C) a compound having a molecular weight of from 200 to 3,000 and containing at least one radiation-curable unsaturated double bond.
摘要翻译： 一种用于磁记录介质的背涂树脂组合物，包括：（A）分子量为5,000至100,000并含有至少两个可辐射固化的不饱和双键的塑料化合物; （B）分子量为3,000〜100,000的橡胶状化合物，含有至少一个可辐射固化的不饱和双键或不含这样的双键; 和（C）分子量为200-3000并含有至少一个可辐射固化的不饱和双键的化合物。
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公开(公告)号：US4618535A
公开(公告)日：1986-10-21
申请号：US642208
申请日：1984-08-20
IPC分类号： C09D175/04 , C09D127/06 , G11B5/64 , G11B5/73 , G11B5/735 , G11B5/72
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/252 , Y10T428/257 , Y10T428/258 , Y10T428/30 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprising a plastic base film, a thin magnetic metal layer formed on one side of the base film and a backing layer formed on the other side of the base film, characterized in that the backing layer is composed essentially of a thermoset or radiation-cured resin and carbon black and inorganic compound powder uniformly dispersed in the resin, and has a surface roughness of from 0.05 to 0.4 .mu.m, said carbon black having an average particle size of from 10 to 150 m.mu.m as measured by an electron microscope, said inorganic compound powder having a Mohs hardness of at most 6 and a particle size of from 10 to 500 m.mu.m, and the ratio of the carbon black to the inorganic compound powder being from 1:9 to 9:1.
摘要翻译： 一种磁记录介质，包括塑料基膜，形成在基膜的一侧上的薄磁性金属层和形成在基膜另一侧上的背衬层，其特征在于背衬层基本上由热固性材料或 辐射固化树脂和炭黑和无机化合物粉末均匀分散在树脂中，表面粗糙度为0.05-0.4μm，所述炭黑的平均粒径为10-150μm，通过 电子显微镜，所述无机化合物粉末的莫氏硬度至多为6，粒径为10〜500μm，碳黑与无机化合物粉末的比例为1:9〜9:1。
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公开(公告)号：US4587150A
公开(公告)日：1986-05-06
申请号：US636497
申请日：1984-08-01
IPC分类号： C09D127/06 , C09D101/12 , C09D175/04 , G11B5/64 , G11B5/72 , G11B5/73 , G11B5/735
CPC分类号： G11B5/735 , G11B5/72 , Y10S428/90 , Y10T428/24355 , Y10T428/24372 , Y10T428/25 , Y10T428/30
摘要： A magnetic recording medium comprising a plastic base film, a thin magnetic metal layer formed on one side of the base film and a backing layer formed on the other side of the base film, characterized in that the backing layer is composed essentially of a thermoset or radiation-cured resin and carbon black dispersed in the resin, and has a surface roughness of from 0.05 to 0.4 .mu.m, said carbon black having an average particle size of from 10 to 60 m.mu.m as measured by an electron microscope.
摘要翻译： 一种磁记录介质，包括塑料基膜，形成在基膜的一侧上的薄磁性金属层和形成在基膜另一侧上的背衬层，其特征在于背衬层基本上由热固性材料或 辐射固化树脂和炭黑分散在树脂中，表面粗糙度为0.05-0.4μm，所述炭黑通过电子显微镜测得的平均粒度为10至60μm。
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公开(公告)号：US4592942A
公开(公告)日：1986-06-03
申请号：US652575
申请日：1984-09-20
IPC分类号： G11B5/66 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/04 , C09D175/14 , G11B5/64 , G11B5/725 , G11B5/73 , G11B5/735 , G11B5/72
CPC分类号： G11B5/725 , G11B5/735 , Y10S428/90 , Y10T428/24355 , 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 on the other side of the substrate, characterized in that the back coating layer is a coating composed essentially of carbon black, a resin binder and a lubricant, the weight ratio of the carbon black to the binder being from 1:1 to 1:4, and the carbon black having a particle size of from 10 to less than 100 m.mu.m.
摘要翻译： 一种磁记录介质，其特征在于，包括非磁性基板，形成在所述基板的一侧的磁记录层和所述基板的另一侧上的背涂层，其特征在于，所述背涂层是基本上由碳黑 ，树脂粘合剂和润滑剂，碳黑与粘合剂的重量比为1：1〜1：4，碳黑的粒径为10〜小于100μm。
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公开(公告)号：US4547419A
公开(公告)日：1985-10-15
申请号：US632115
申请日：1984-07-18
CPC分类号： G11B5/714 , G11B5/735 , Y10S428/90 , Y10T428/24942 , Y10T428/256
摘要： A magnetic recording medium which comprises a plastic base film and a magnetic layer formed on one side of the base film and composed of a ferromagnetic alloy powder dispersed in a resin binder, characterized in that said ferromagnetic alloy powder has a surface area of at least 48 m.sup.2 /g measured by BET method, said magnetic layer has a coercive force of at least 1,000 Oe and a surface roughness of at most 0.08 .mu.m, and a radiation-cured backing layer made of a radiation sensitive resin and having a surface roughness of from 0.05 to 0.6 .mu.m is formed on the other side of the base film.
摘要翻译： 一种磁记录介质，包括塑料基膜和形成在基膜的一侧上并由分散在树脂粘合剂中的铁磁性合金粉末构成的磁性层，其特征在于所述铁磁性合金粉末的表面积至少为48 m 2 / g，所述磁性层具有至少1000Oe的矫顽力和至多0.08μm的表面粗糙度，以及由辐射敏感树脂制成的具有表面粗糙度的辐射固化背衬层 在基膜的另一面上形成0.05〜0.6μm。
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公开(公告)号：US4639389A
公开(公告)日：1987-01-27
申请号：US680889
申请日：1984-12-12
CPC分类号： G11B5/735 , G11B5/7085 , Y10S428/90 , Y10T428/24355 , Y10T428/24372 , Y10T428/24405 , Y10T428/25 , Y10T428/31609 , Y10T428/31935 , Y10T428/31938
摘要： A magnetic recording medium comprising a plastic base film, a magnetic layer formed on one side of the base film and a backing layer formed on the other side of the base film, characterized in that said magnetic layer has a surface roughness of at most 0.08 .mu.m, and said backing layer is composed essentially of first particles of an inorganic pigment having an average particle size of from 0.04 to 0.5 .mu.m and a Mohs hardness of from 2 to 4 and second particles of an inorganic pigment having an average particles size of from 0.04 to 0.5 .mu.m and a Mohs hardness of from 5 to 7, dispersed in a thermoset or radiation-cured binder.
摘要翻译： 一种磁记录介质，包括塑料基膜，形成在基膜的一侧的磁性层和形成在基膜另一侧的背衬层，其特征在于，所述磁性层的表面粗糙度至多为0.08μm m，所述背衬层基本上由平均粒度为0.04〜0.5μm，莫氏硬度为2〜4的无机颜料的第1粒子和平均粒径为2〜4的无机颜料的第2粒子 分散在热固性或辐射固化粘合剂中的0.04-0.5μm和莫氏硬度为5至7。
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公开(公告)号：US4678708A
公开(公告)日：1987-07-07
申请号：US807825
申请日：1985-12-11
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/04 , C09D175/14 , G11B5/702
CPC分类号： G11B5/7023 , Y10S428/90 , Y10T428/265 , Y10T428/31786 , Y10T428/31797 , Y10T428/31935
摘要： A magnetic recording medium, obtained by preparing a radiation-sensitive curing resin by modification of a copolymer of (A) vinyl chloride, (B) a vinyl carboxylate, (C) an unsaturated carboxylic acid and (D) an unsaturated carboxylic anhydride, containing 50 to 80% by weight of (A) based on the total of (A) and (B), 10 to 30% by weight of (D) based on the total of (C) and (D) and a total of 1 to 5 parts by weight of (C) and (D) based on 100 parts by weight of (A) and (B) and having an average polymerization degree of 100 of 400, and a magnetic powder thereby producing a magnetic paint, applying said magnetic paint to a non-magnetic substrate, and solidifying the resultant coating of paint on said substrate by exposure to radiation.
摘要翻译： 通过改变（A）氯乙烯，（B）乙烯基羧酸酯，（C）不饱和羧酸和（D）不饱和羧酸酐的共聚物制备辐射敏感固化树脂得到的磁记录介质，其包含 基于（A）和（B）的总和（A）为50〜80重量％，（C）和（D）总计为10〜30重量％（D），总计1 相对于100重量份的（A）和（B），平均聚合度为100的400重量份的（C）和（D）的5重量份，和由此制成磁性涂料的磁性粉末， 将磁性涂料涂覆到非磁性基材上，并通过暴露于辐射使所得基材上的涂料固化。
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公开(公告)号：US4734326A
公开(公告)日：1988-03-29
申请号：US694281
申请日：1985-01-24
IPC分类号： C10M105/76 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , C10N40/18 , G11B5/64 , G11B5/706 , G11B5/714 , G11B5/73 , G11B5/735 , B32B5/16 , G11B5/78
CPC分类号： G11B5/70605 , G11B5/64 , G11B5/714 , G11B5/735 , Y10S428/90 , Y10T428/256
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 coating layer comprising zinc sulfide and a resin binder.
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，所述背涂层是包含硫化锌 和树脂粘合剂。
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公开(公告)号：US4828899A
公开(公告)日：1989-05-09
申请号：US127568
申请日：1987-12-02
CPC分类号： G11B5/725 , G11B5/722 , Y10S428/90 , Y10T428/24355 , Y10T428/24372 , Y10T428/25
摘要： A magnetic recording medium comprising a ferromagnetic metal thin film layer primarily based on cobalt and formed on the surface of a flexible substrate, and an organic topcoat layer containing a radiation curable compound having a molecular weight of less than 2,000, an anti-oxidant, and a lubricant on the surface of the metal thin film layer is provided with protrusions on its surface at an average density of at least 10.sup.5 /a.sup.2 per square millimeter of the surface, the protrusions having a height of 30 to 300 .ANG. where a is the distance of a gap in a magnetic head across which the medium is passed in recording/reproducing operation.
摘要翻译： 一种磁记录介质，包括主要基于钴并形成在柔性基板的表面上的强磁性金属薄膜层和包含分子量小于2,000的可辐射固化化合物的有机顶涂层，抗氧化剂和 在金属薄膜层的表面上的润滑剂在其表面上以平均密度为每平方毫米表面的至少105 / a2的平均密度设置有突起，突起具有30至300的高度ANGSTROM，其中a是距离 在记录/再现操作中介质通过的磁头中的间隙。
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