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1. 发明授权

US06127030A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06127030A
公开(公告)日：2000-10-03
申请号：US50181
申请日：1998-03-30
申请人： Shuji Iida , Kiyoto Fukushima
发明人： Shuji Iida , Kiyoto Fukushima
IPC分类号： G11B5/735
CPC分类号： G11B5/735 , Y10T428/25
摘要： Disclosed is a magnetic recording medium good in production efficiency, paint stability and electromagnetic characteristics, and improved in running properties and durability, which has a magnetic layer formed on a surface side of a non-magnetic support and a backcoat layer formed on a back side thereof, in which said backcoat layer is formed by kneading a compounded composition comprising 50 parts to 120 parts by weight of carbon black (P) per 100 parts by weight of a resin binder (B) (P/B=0.5/1 to 1.2/1), said carbon black (P) having an average particle size of 18 nm to 25 nm and a DBP oil absorption of 90 cc/100 g to 125 cc/100 g, 0.3 part to 2.5 parts by weight of large-sized carbon black or carbon graphite having an average particle size of 150 nm to 500 nm per 100 parts by weight of said carbon black, and a vinyl chloride copolymer as the resin binder, said copolymer containing at least amine-modified vinyl units and acidic functional group-containing vinyl units at the same time, so as to satisfy that the concentration of nonvolatile components is 45 to 60%, and that the P/B is 1.5/1 to 3.5/1, and then, dispersing the kneaded compound by dilution.
摘要翻译：公开了一种磁性记录介质，其制造效率，涂料稳定性和电磁特性良好，运行性能和耐久性提高，其具有形成在非磁性载体的表面侧的磁性层和形成在背面的背涂层其中所述背涂层通过将每100重量份树脂粘合剂（B）（P / B = 0.5 / 1至1.2）包含50重量份至120重量份炭黑（P）的混合组合物 / 1），所述炭黑（P）的平均粒径为18nm〜25nm，DBP吸油量为90cc / 100g〜125cc / 100g，0.3〜2.5重量份的大尺寸每100重量份所述炭黑具有150nm至500nm的平均粒度的碳黑或碳石墨和作为树脂粘合剂的氯乙烯共聚物，所述共聚物至少含有胺改性的乙烯基单元和酸性官能团含乙烯基单元以满足不挥发成分的浓度为45〜60％，P / B为1.5 / 1〜3.5 / 1，然后通过稀释分散混炼的化合物。

2. 发明授权

US5721010A Method for production of magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US5721010A
公开(公告)日：1998-02-24
申请号：US798098
申请日：1997-02-12
申请人： Kiyonori Hinoki , Kiyoto Fukushima , Shigeo Kurose
发明人： Kiyonori Hinoki , Kiyoto Fukushima , Shigeo Kurose
IPC分类号： G11B5/70 , G11B5/73 , G11B5/735 , G11B5/84 , G11B5/842 , B05D5/12
CPC分类号： G11B5/842 , G11B5/84 , G11B5/8404
摘要： This invention produces a magnetic recording medium by applying a magnetic paint for the formation of the magnetic layer and a paint for the formation of the backcoat layer severally to the nonmagnetic support, drying the applied layers of the paints, optionally subjecting the layers to a calendering treatment, performing a curing treatment on the layers thereby adjusting the surface of the backcoat layer to a surface roughness (Ra).sub.B in the range of 10 nm to 30 nm, and thereafter subjecting the surface of the backcoat layer subsequent to the curing treatment to a polishing treatment by the use of a lapping tape the abrasive layer of which has a surface roughness (Ra).sub.L in the range of 150 nm to 550 nm. In a preferred embodiment of this invention, the Mohs hardness of the abrasive grains contained in the abrasive layer is set within a prescribed range and the conditions of the curing treatment are fixed within prescribed ranges. The magnetic recording medium produced by this invention, therefore, never suffers the surface of the backcoat layer to sustain a scratch, provides thorough protection against the occurrence of instantaneous clogging and DO, and exhibits a veritably excellent running property (evinced particularly by the realization of low torque against the POM guide).
摘要翻译：本发明通过施加用于形成磁性层的磁性涂料和用于与非磁性载体分别形成背涂层的涂料来生产磁记录介质，干燥涂料的涂层，任选地使层压延处理，对层进行固化处理，由此将背涂层的表面调整为10nm〜30nm范围内的表面粗糙度（Ra）B，然后对固化处理后的背涂层的表面进行通过使用其研磨层的表面粗糙度（Ra）L在150nm至550nm的范围内的研磨带的抛光处理。在本发明的一个优选实施例中，研磨层中包含的磨粒的莫氏硬度设定在规定范围内，固化处理条件固定在规定范围内。因此，本发明生产的磁记录介质从不会受到背涂层的表面的伤害，从而提供了防止瞬时堵塞和DO发生的全面保护，并且显示出优异的运行性能（特别是通过实现针对POM引导的低扭矩）。

3. 发明授权

US6126990A Method for producing magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US6126990A
公开(公告)日：2000-10-03
申请号：US40438
申请日：1998-03-18
申请人： Kiyonori Hinoki , Kiyoto Fukushima
发明人： Kiyonori Hinoki , Kiyoto Fukushima
IPC分类号： G11B5/706 , G11B5/842 , B05D5/12
CPC分类号： G11B5/70636 , G11B5/842
摘要： A method for producing a magnetic recording medium having low head abrasion loss and excellent mechanical strength characteristics, said medium having a magnetic layer mainly composed of a ferromagnetic powder and a binder on one surface of a non-magnetic support and a backcoat layer on the other surface of the support, wherein said ferromagnetic powder comprises chromium dioxide and cobalt-containing iron oxide within the weight ratio (wt %) range of 40:60 to 70:30, and said magnetic layer is formed of a paint prepared by a process comprising kneading cobalt-containing iron oxide and the binder at a solid concentration of 65% to 85% by weight, subsequently diluting the resulting product with the binder and a solvent, then, adding chromium dioxide thereto, followed by stirring to obtain a mixture, and subjecting the mixture to dispersion.
摘要翻译：一种具有低磁头磨耗损耗和优异的机械强度特性的磁记录介质的制造方法，所述介质具有主要由非磁性载体的一个表面上的铁磁性粉末和粘结剂构成的磁性层和另一面的背涂层其中所述铁磁粉末包含重量比（wt％）范围为40:60至70:30的二氧化铬和含钴氧化铁，并且所述磁性层由通过包括以下步骤的方法制备的涂料形成：以固体浓度为65〜85重量％的方式捏合含钴氧化铁和粘合剂，随后用粘合剂和溶剂稀释所得产物，然后向其中加入二氧化铬，然后搅拌以获得混合物，并且使混合物分散。

4. 发明授权

US06117484A Method for producing magnetic recording medium 有权
标题翻译：磁记录介质的制造方法
公开(公告)号：US06117484A
公开(公告)日：2000-09-12
申请号：US173542
申请日：1998-10-16
申请人： Kiyonori Hinoki , Kiyoto Fukushima
发明人： Kiyonori Hinoki , Kiyoto Fukushima
IPC分类号： G11B5/84 , G11B5/842 , B05D5/12
CPC分类号： G11B5/8404 , Y10S428/90
摘要： Disclosed is a method for producing a magnetic recording medium comprising coating both sides of a non-magnetic support with paints for formation of coating films, followed by simultaneous drying of the respective coating films, in which the following four requirements are fulfilled, taking the amount of the paint coated on one side (a magnetic layer side) of the non-magnetic support as "W MAG" and the amount of the paint coated on the other side (a backcoat layer side) thereof as "W BC":2.0 g/m.sup.2 .ltoreq.W MAG.ltoreq.40.0 g/m.sup.2 (1)2.5 g/m.sup.2 .ltoreq.W BC.ltoreq.25.0 g/m.sup.2 (2)3 W MAG.gtoreq.-16 W BC+70 (3)9 W MAG.ltoreq.-10 W BC+385 (4)thereby being able to produce the magnetic recording medium excellent in electromagnetic characteristics, magnetic characteristics and running durability without deteriorating the appearance of a coated sheet roll.
摘要翻译：公开了一种磁记录介质的制造方法，其特征在于，包括用形成涂膜的涂料涂覆非磁性载体的两面，然后同时干燥其中符合以下四个要求的各个涂膜，涂布在非磁性载体的一侧（磁性层侧）上的涂料为“W MAG”，涂布在另一侧（背涂层侧）上的涂料的量为“W BC”：2.0g / m2 / = - 16W BC + 70 ）9W MAG

5. 发明授权

US5510179A Magnetic recording medium having at least two layers wherein the uppermost layer contains alumina particles which contain specified oxides 失效
标题翻译：具有至少两层的磁记录介质，其中最上层含有含有特定氧化物的氧化铝颗粒
公开(公告)号：US5510179A
公开(公告)日：1996-04-23
申请号：US361578
申请日：1994-12-22
申请人： Kiyoto Fukushima , Sadafumi Iijima , Motoyuki Tsunoda
发明人： Kiyoto Fukushima , Sadafumi Iijima , Motoyuki Tsunoda
IPC分类号： C09D5/23 , G11B5/41 , G11B5/70 , G11B5/708 , G11B5/716 , G11B5/738 , G11B5/842 , G11B5/00
CPC分类号： G11B5/842 , G11B5/41 , G11B5/70 , G11B5/708 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/26 , Y10T428/265 , Y10T428/2982
摘要： A magnetic recording medium has at least two coating layers on a non-magnetic substrate. The uppermost layer of the coating layers is a magnetic layer having a thickness of 0.2-0.5 .mu.m thick and comprising a ferromagnetic powder, inorganic material-containing alumina particles having a mean particle size of 0.1-0.3 .mu.m, and a binder. The medium ensures effective head cleaning and has improved durability and still life.
摘要翻译：磁记录介质在非磁性基底上具有至少两个涂层。涂层的最上层是厚度为0.2-0.5μm的磁性层，其中含有铁磁性粉末，平均粒径为0.1-0.3μm的含无机材料的氧化铝颗粒和粘合剂。该介质确保有效的头部清洁，并提高耐用性和静物。

6. 发明授权

US5567502A Magnetic recording medium having a magnetic layer containing abrasive particles 失效
标题翻译：具有含有磨粒的磁性层的磁记录介质
公开(公告)号：US5567502A
公开(公告)日：1996-10-22
申请号：US405192
申请日：1995-03-16
申请人： Hiroyuki Miyabara , Shigeharu Watase , Yoshio Kawakami , Kiyoto Fukushima
发明人： Hiroyuki Miyabara , Shigeharu Watase , Yoshio Kawakami , Kiyoto Fukushima
IPC分类号： B32B27/18 , B32B33/00 , C09D5/23 , C09D7/12 , G11B5/708 , G11B5/716 , G11B5/73 , G11B5/733
CPC分类号： G11B5/716 , G11B5/7085 , G11B5/7305 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： Disclosed is a magnetic recording medium comprising a nonmagnetic support and a paint film layer which is provided on the support and has a lamination structure consisting of two or more layers, wherein the top surface magneticlayer of the layers constituting the paint film layer contains abrasive particles having a Mohs hardness of not less than 6 in an amount of 3 to 16 parts by weight based on 100 parts by weight of a ferromagnetic powder and has a thickness of not more than 0.5 .mu.m, a ratio of a mean particle diameter of the abrasive particles to the thickness of the top surface magnetic layer is in the range of 1.0 to 1.8, and a content of the abrasive particles each having a size larger than the thickness of the top surface magnetic layer in the particle size distribution of the abrasive particles is in the range of 50 to 90% by weight. The magnetic recording medium having such constitution is excellent in running endurance and running properties and shows high electromagnetic conversion characteristics.
摘要翻译：公开了一种包含非磁性载体和涂膜层的磁记录介质，其设置在载体上并具有由两层或多层组成的层压结构，其中构成涂膜层的层的顶表面层是含有具有相对于100重量份铁磁性粉末为3〜16重量份的莫氏硬度为6以上，厚度为0.5μm以下，磨料的平均粒径的比例与上表面磁性层的厚度相关的粒子在1.0〜1.8的范围内，磨粒的粒径分别大于上表面磁性层的厚度的磨粒的含量为在50至90重量％的范围内。具有这种结构的磁记录介质具有优异的运行耐久性和运行性能，并且显示出高的电磁转换特性。

7. 发明授权

US5110659A Lapping tape 失效
标题翻译：皮带
公开(公告)号：US5110659A
公开(公告)日：1992-05-05
申请号：US522079
申请日：1990-05-10
申请人： Yoshisuke Yamakawa , Kiyoto Fukushima , Koji Matsuno
发明人： Yoshisuke Yamakawa , Kiyoto Fukushima , Koji Matsuno
IPC分类号： B24B19/26 , B24D11/00 , C08J5/14 , G11B5/127 , G11B5/187 , G11B5/41 , G11B5/53
CPC分类号： B24D11/00 , B24B19/26 , G11B5/1871 , G11B5/41 , G11B5/53 , Y10S428/90 , Y10T428/256 , Y10T428/257
摘要： A lapping tape has an abrasive coat which comprises an acicular iron oxide powder having a surface area of at least 30 m.sup.2 /g as determined by the BET method and a granular inorganic powder having a Moh's hardness of more than 7 and contained in an amount of from 2.0 to 30 percent by weight on the basis of the weight of the oxide powder. The coat has a centerline mean roughness between 0.015 and 0.03 .mu.m. Preferably the acicular iron oxide is magnetic, and the inorganic powder ranges in particle diameter from 0.05 to 0.4 .mu.m.
摘要翻译：研磨带具有磨料涂层，其包含通过BET法测定的表面积至少为30m 2 / g的针状氧化铁粉末和莫氏硬度大于7的粒状无机粉末，其含量为基于氧化物粉末的重量，为2.0〜30重量％。该涂层的中心线平均粗糙度在0.015和0.03μm之间。针状氧化铁优选为磁性，无机粉末的粒径为0.05〜0.4μm。

8. 发明授权

US4659626A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4659626A
公开(公告)日：1987-04-21
申请号：US750446
申请日：1985-07-01
申请人： Kiyoto Fukushima , Shigeru Takamatsu , Eiji Kitaura
发明人： Kiyoto Fukushima , Shigeru Takamatsu , Eiji Kitaura
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D167/00 , C09D175/00 , C09D175/04 , G11B5/702
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31931 , Y10T428/31935 , Y10T428/31938
摘要： In a magnetic recording medium consisting of a base coated with a magnetic coating material, or a dispersion of magnetic particles in a resinous binder, the binder comprises a copolymer composed of vinyl chloride, a vinyl alkylcarboxylate, another monomer copolymerizable with vinyl chloride, and a saponified vinyl alkylcarboxylate and having an OH/CH absorption ratio according to the infrared absorption spectrum of 0.2 to 0.7, a polyurethane resin having in its molecule a --SO.sub.3 M group wherein M represents an alkali metal atom, and a polyurethane resin or polyester resin or both containing no --SO.sub.3 M group wherein M represents an alkali metal atom, and a polyisocyanate.
摘要翻译：在由涂覆有磁性涂层材料的基底或磁性颗粒在树脂粘合剂中的分散体组成的磁记录介质中，粘合剂包括由氯乙烯，烷基羧酸乙烯酯，可与氯乙烯共聚的其它单体组成的共聚物，和皂化乙烯基烷基羧酸酯，并且根据红外吸收光谱为0.2〜0.7，具有OH / CH吸收比，分子中具有M 3表示碱金属原子的-SO 3 M基团的聚氨酯树脂，以及聚氨酯树脂或聚酯树脂不含有-SO 3 M基团，其中M表示碱金属原子，和多异氰酸酯。

9. 发明授权

US4578314A Magnetic recording medium and method for manufacture thereof 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：US4578314A
公开(公告)日：1986-03-25
申请号：US651219
申请日：1984-09-17
申请人： Hiroshi Ohta , Shinji Abe , Kiyoto Fukushima
发明人： Hiroshi Ohta , Shinji Abe , Kiyoto Fukushima
IPC分类号： C09D5/23 , C09D7/12 , C09D9/04 , G11B5/708 , G11B5/842 , G11B5/70
CPC分类号： G11B5/7085 , Y10S428/90 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995 , Y10T428/2996
摘要： A magnetic recording medium having deposited on the surface of a non-magnetic substrate a magnetic layer formed by dispersing a powdered magnetic substance and a powdered abrasive in a binder, which magnetic recording medium is characterized by having abrasive particles activated on the surface thereof.
摘要翻译：一种磁记录介质，其在非磁性基板的表面上沉积有磁性层，该磁性层通过将粉末状磁性物质和粉末磨料分散在粘合剂中而形成，该磁性记录介质的特征在于在其表面上具有激活的磨料颗粒。

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