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公开(公告)号：US4837083A
公开(公告)日：1989-06-06
申请号：US95298
申请日：1987-09-10
Applicant: Kazuhiro Kuroda , Kazushi Tanaka , Hitoshi Azegami
Inventor： Kazuhiro Kuroda , Kazushi Tanaka , Hitoshi Azegami
IPC: G11B5/70 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/708
CPC classification number: G11B5/708 , Y10S428/90 , Y10T428/257
Abstract: A magnetic recording medium comprising a plastic base and a magnetic layer formed thereon by applying a dispersion of a ferromagnetic powder in a resin binder, the magnetic layer containing the ferromagnetic powder which has a BET specific surface area of at least 35 m.sup.2 /g and .alpha.-Al2O3 particles having a particle size not exceeding one half the mean particle diameter of the ferromagnetic powder and less than 0.1 .mu.m in diameter, the .alpha.-Al2O3 particles being added in an amount greater than 5% but less than 15% by weight on the basis of the weight of the ferromagnetic powder. The magnetic powder is a metallic magnetic powder containing iron as the major constituent. The .alpha.-Al2O3 particles are cube-shaped.
Abstract translation: 一种磁记录介质，包括通过将铁磁粉末的分散体施加在树脂粘合剂中而形成在其上的磁性层，所述磁性层含有BET比表面积至少为35m 2 / g的铁磁性粉末和α -Al2O3颗粒的粒径不超过铁磁粉末的平均粒径的一半，直径小于0.1μm，α-Al 2 O 3颗粒以大于5％但小于15％重量的量加入 铁粉的重量的基础。 磁粉是以铁为主要成分的金属磁性粉末。 α-Al2O3颗粒是立方体。
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公开(公告)号：US4460653A
公开(公告)日：1984-07-17
申请号：US544804
申请日：1983-10-24
Applicant: Hitoshi Azegami , Hiroshi Kawahara , Fujio Shibata
Inventor： Hitoshi Azegami , Hiroshi Kawahara , Fujio Shibata
CPC classification number: G11B5/7023 , G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
Abstract: A magnetic recording medium, comprising a magnetic layer and a non-magnetic substrate therefor, which magnetic layer is formed by dispersing magnetic powder in a vehicle formed of a copolymer containing vinyl chloride, another monomer copolymerizable with said vinyl chloride, a vinyl ester of an alkanoic acid and a saponification product thereof and having an OH/CH absorption ratio of 0.2 to 0.7 in the infrared absorption spectrum, and a rubbery binder.
Abstract translation: 一种磁记录介质，包括磁性层和非磁性基底，该磁性层通过将磁性粉末分散在由含有氯乙烯的共聚物形成的载体中形成，另一种可与所述氯乙烯共聚的单体， 链烷酸和皂化产物，并且在红外吸收光谱中OH / CH吸收比为0.2至0.7，和橡胶粘合剂。
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公开(公告)号：US4423453A
公开(公告)日：1983-12-27
申请号：US283099
申请日：1981-07-13
Applicant: Hiroshi Kawahara , Hitoshi Azegami , Eiji Horigome
Inventor： Hiroshi Kawahara , Hitoshi Azegami , Eiji Horigome
CPC classification number: G11B5/716 , Y10S428/90 , Y10T428/24942
Abstract: A magnetic recording medium having two coated magnetic layers of a first magnetic layer and a second magnetic layer on a non-magnetic substrate. The first magnetic layer has a coercive force of 400 to 590 Oe and a thickness of 2.1 to 2.8.mu. and said second magnetic layer has a coercive force of 590 to 800 Oe and a thickness of at least 2.1.mu..
Abstract translation: 一种在非磁性基板上具有第一磁性层和第二磁性层的两个涂覆磁性层的磁记录介质。 第一磁性层的矫顽力为400〜590Oe，厚度为2.1〜2.8μm，第二磁性层的矫顽力为590〜800Oe，厚度为2.1μm以上。
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公开(公告)号：US4400435A
公开(公告)日：1983-08-23
申请号：US283549
申请日：1981-07-15
Applicant: Kuniichi Yoda , Takehisa Ohkawa , Hitoshi Azegami
Inventor： Kuniichi Yoda , Takehisa Ohkawa , Hitoshi Azegami
CPC classification number: G11B5/7022 , Y10S428/90 , Y10T428/31609
Abstract: A magnetic recording medium comprises a substrate coated with a magnetic layer comprising a magnetic powder and a binder comprising an urethane resin and a vinyl chloride-vinyl acetate-maleic acid copolymer having a content of maleic acid component of at least 1.5%.
Abstract translation: 磁记录介质包括涂覆有包含磁性粉末的磁性层的基材和包含聚氨酯树脂和含有至少1.5％马来酸成分的氯乙烯 - 乙酸乙烯酯 - 马来酸共聚物的粘合剂。
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公开(公告)号：US4380035A
公开(公告)日：1983-04-12
申请号：US184063
申请日：1980-09-04
Applicant: Hiroshi Ota , Eiji Horigome , Hitoshi Azegami
Inventor： Hiroshi Ota , Eiji Horigome , Hitoshi Azegami
IPC: G11B23/087 , G11B23/04
CPC classification number: G11B23/08771
Abstract: A magnetic tape cassette comprises a pad support membrane made of a metal alloy such as bronze and nickel silver. The pad support membrane is coated with a synthetic resin layer containing a rust inhibitor.
Abstract translation: 磁带盒包括由诸如青铜和镍银之类的金属合金制成的衬垫支撑膜。 衬垫支撑膜涂有含防锈剂的合成树脂层。
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Patent Agency Ranking
公开(公告)号：US4289828A
公开(公告)日：1981-09-15
申请号：US98242
申请日：1979-11-28
Applicant: Hiroshi Ota , Eiji Horigome , Hitoshi Azegami
Inventor： Hiroshi Ota , Eiji Horigome , Hitoshi Azegami
CPC classification number: G11B5/7013 , Y10S428/90 , Y10T428/31565 , Y10T428/31609 , Y10T428/31794 , Y10T428/31935
Abstract: A magnetic recording medium made by coating a base with a magnetic coating material which is a dispersion of magnetic particles in a binder of synthetic resins using a polyfunctional aromatic isocyanate as a curing agent, characterized by the addition of a sorbitan stearate type surface active agent which has a sorbitol derivative in the hydrophilic group. The present magnetic recording medium has superior mechanical properties, especially a superior running quality as well as superior electromagnetic properties.
Abstract translation: 使用多官能芳族异氰酸酯作为固化剂的磁性涂料将磁性粒子分散在合成树脂的粘合剂中的磁性涂料进行涂布而成的磁记录介质，其特征在于添加脱水山梨糖醇硬脂酸酯型表面活性剂，其中， 在亲水基团中具有山梨糖醇衍生物。 本磁记录介质具有优异的机械性能，特别是优越的运行质量以及优异的电磁特性。
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公开(公告)号：USD682927S1
公开(公告)日：2013-05-21
申请号：US29410715
申请日：2012-01-11
Applicant: Hitoshi Azegami
Designer： Hitoshi Azegami
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公开(公告)号：USD404653S
公开(公告)日：1999-01-26
申请号：US78439
申请日：1997-10-23
Applicant: Hitoshi Azegami , Toshiaki Kume
Designer： Hitoshi Azegami , Toshiaki Kume
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公开(公告)号：US4615949A
公开(公告)日：1986-10-07
申请号：US755630
申请日：1985-07-12
Applicant: Kuniichi Yoda , Yuji Ishihara , Hitoshi Azegami
Inventor： Kuniichi Yoda , Yuji Ishihara , Hitoshi Azegami
IPC: G11B5/84 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/70
CPC classification number: G11B5/7022 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31609 , Y10T428/31935
Abstract: A magnetic recording medium comprises a magnetic coating material, or a dispersion of magnetic particles in a resinous binder, and a base to which the coating material is solidly applied, the resinous binder comprising as its ingredients a copolymer composed of vinyl chloride, vinylidene 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 at least 0.2, a polyurethane resin having in its molecule a --SO.sub.3 M group wherein M represents an alkali metal atom, and a polyisocyanate.
Abstract translation: 磁记录介质包括磁性涂层材料，或者在树脂粘合剂中的磁性颗粒的分散体和固体涂覆材料的基底，该树脂粘合剂包括由氯乙烯，偏二氯乙烯， 乙烯基烷基羧酸酯，可与氯乙烯共聚的另一种单体，以及皂化的乙烯基烷基羧酸酯，并且具有至少0.2的红外吸收光谱的OH / CH吸收比，在其分子中具有-SO 3 M基团的聚氨酯树脂，其中M表示 碱金属原子和多异氰酸酯。
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公开(公告)号：US4608315A
公开(公告)日：1986-08-26
申请号：US723788
申请日：1985-04-16
Applicant: Kuniichi Yoda , Yuji Ishihara , Hitoshi Azegami
Inventor： Kuniichi Yoda , Yuji Ishihara , Hitoshi Azegami
IPC: C09D5/23 , C09D109/02 , C09D121/00 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/70 , G11B5/702
CPC classification number: G11B5/7023 , G11B5/7013 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31609 , Y10T428/31786 , Y10T428/3183 , Y10T428/31931 , Y10T428/31935
Abstract: A magnetic recording medium comprising a resinous component in which magnetic particles are dispersed and a base to which the dispersion is solidly applied, the resinous component consisting of a copolymer having an OH/CH absorption ratio according to the infrared absorption spectrum of 0.2 or more and made from (A) vinyl chloride, (B) vinylidene chloride, (C) a vinyl alkylcarboxylate, (D) an other monomer copolymerizable with vinyl chloride, and (E) a saponified vinyl alkylcarboxylate, and a rubbery binder. Alternatively, a polyisocyanate is added to the above copolymer.
Abstract translation: 一种磁性记录介质，包括其中分散有磁性颗粒的树脂组分和固体分散体所固体的基体，所述树脂组分由根据红外吸收光谱为0.2或更高的OH / CH吸收比的共聚物组成， 由（A）氯乙烯，（B）偏二氯乙烯，（C）乙烯基烷基羧酸酯，（D）可与氯乙烯共聚的其它单体，和（E）皂化的乙烯基烷基羧酸酯和橡胶粘合剂。 或者，将多异氰酸酯加入到上述共聚物中。
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