专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明授权

US4728563A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4728563A
公开(公告)日：1988-03-01
申请号：US898421
申请日：1986-08-20
申请人： Shinji Saito , Hiroshi Ogawa , Chiaki Mizuno , Yasuo Tamai
发明人： Shinji Saito , Hiroshi Ogawa , Chiaki Mizuno , Yasuo Tamai
IPC分类号： G11B5/70 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/704
CPC分类号： G11B5/7305 , Y10S428/90 , Y10T428/24942 , Y10T428/2978
摘要： A magnetic recording medium in the form of tape such as an audio-tape or a video-tape comprising a flexible support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, which is characterized in that said magnetic recording medium has dynamic modulus of not lower than 4.5.times.10.sup.10 dyne/cm.sup.2 in the longitudinal direction at 110.degree. C.
摘要翻译：磁带式磁记录介质，例如音频带或录像带，其中包括柔性支撑件和设置在所述支架上的磁记录层，所述磁记录层包括分散在粘合剂中的铁磁性粉末，其特征在于因为所述磁记录介质在110℃下的纵向的动态模量不低于4.5×10 10达因/ cm 2。

32. 发明授权

US4722862A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4722862A
公开(公告)日：1988-02-02
申请号：US850614
申请日：1986-04-11
申请人： Hiroshi Ogawa , Nobuo Yamazaki , Yasuo Tamai
发明人： Hiroshi Ogawa , Nobuo Yamazaki , Yasuo Tamai
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , C09D183/04 , G11B5/70 , G11B5/706 , G11B5/73
CPC分类号： G11B5/70642 , G11B5/70 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, in whichH.sub.1 in terms of oersted which is a value of external magnetic field determined when a magnetic flux density of a magnetic hysteresis curve determined in the direction of orientation of the ferromagnetic powder in the magnetic recording layer in the fourth quadrant is equivalent to one-third of the maximum magnetic flux density of said magnetic hysteresis curve in the third quadrant;H.sub.2 in terms of oersted which is a value of external magnetic field determined when a magnetic flux density of said magnetic hysteresis curve in the first quadrant is equivalent to one-third of the maximum magnetic flux density of said magnetic hysteresis curve in the first quadrant;Hc in terms of oersted which is a coercive force of the magnetic recording layer; andBr in terms of gauss which is a residual magnetic flux density of the magnetic recording layer,have the relationship defined by the following inequality:10.times.(H.sub.2 -H.sub.1)/Hc.ltoreq.0.0004.times.Br+1.
摘要翻译：一种包含非磁性载体和设置在所述载体上的磁记录层的磁记录介质，所述磁记录层包括分散在粘结剂中的铁磁性粉末，其中以奥斯特为基础的H1，其为当磁性在第四象限中的磁记录层中的铁磁性粉末的取向方向确定的磁滞曲线的磁通密度相当于第三象限中所述磁滞曲线的最大磁通密度的三分之一; H2，其是当第一象限中的所述磁滞曲线的磁通密度等于第一象限中的所述磁滞曲线的最大磁通密度的三分之一时确定的外部磁场的值; Hc是磁记录层的矫顽力的奥斯特; 以及作为磁记录层的残留磁通密度的高斯计，具有以下不等式定义的关系：10x（H2-H1）/ Hc <0.0004×Br + 1。

33. 发明授权

US4664981A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4664981A
公开(公告)日：1987-05-12
申请号：US692807
申请日：1985-01-18
申请人： Hiroshi Ogawa , Yasuo Tamai
发明人： Hiroshi Ogawa , Yasuo Tamai
IPC分类号： G11B5/70 , C08L27/06 , C08L75/00 , C08L75/04 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , C09D175/06 , G11B5/702 , G11B5/73
CPC分类号： G11B5/7023 , G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31931 , Y10T428/31935 , Y10T428/31938
摘要： A magnetic recording medium having excellent electromagnetic properties and satisfactory running durability prepared by mixing a highly concentrated solution of copolymers for vinyl chloride, vinyl acetate and maleic anhydride with ferromagnetic particles and kneading them, and then adding a solution of rubber type resins and additives thereto and dispersing them, and if desired, by adding and mixing polyisocyanate compounds therewith.
摘要翻译：通过将氯乙烯，乙酸乙烯酯和马来酸酐的共聚物的高浓度溶液与铁磁性颗粒混合并捏合而制备的具有优异的电磁特性和令人满意的运行耐久性的磁记录介质，然后向其中加入橡胶类树脂和添加剂溶液，分散它们，如果需要，通过加入和混合多异氰酸酯化合物。

34. 发明授权

US4500599A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4500599A
公开(公告)日：1985-02-19
申请号：US613748
申请日：1984-05-23
申请人： Hiroshi Ogawa , Chiaki Mizuno , Kouichi Masaki , Masaaki Suzuki , Yasuo Tamai
发明人： Hiroshi Ogawa , Chiaki Mizuno , Kouichi Masaki , Masaaki Suzuki , Yasuo Tamai
IPC分类号： C09D5/23 , C09D7/12 , G11B5/706 , G11B5/714 , G11B5/70 , B32B5/16
CPC分类号： G11B5/70652 , Y10S428/90 , Y10T428/265
摘要： A magnetic recording medium comprising a nonmagnetic base having formed thereon a magnetic layer containing a fine particulate ferromagnetic material dispersed in a binder is disclosed. The ferromagnetic material is a mixture of two fine ferromagnetic powders (a) and (b) in a weight ratio of from 90/10 to 30/70. The powder (a) comprises .gamma.-Fe.sub.2 O.sub.3 particles having a coercivity (Hc) of 330 to 390 Oe and a saturation magnetization (.sigma.s) of 68 to 80 emu/g at a maximum magnetizing force (Hm) of 5 KOe, and a specific surface area of 18 to 25 m.sup.2 /g, and powder (b) comprises .gamma.-Fe.sub.2 O.sub.3 particles having a coercivity (Hc) of 400 to 450 Oe and a saturation magnetization (.sigma.s) of 65 to 78 emu/g at a maximum magnetizing force (Hm) of 5 KOe, and a specific surface area of 22 to 30 m.sup.2 /g. The tape has the ability to clearly and faithfully reproduce high fidelity sound.
摘要翻译：公开了一种磁记录介质，其包括在其上形成有包含分散在粘合剂中的细颗粒铁磁材料的磁性层的非磁性基底。铁磁材料是两种细铁磁粉末（a）和（b）的重量比为90/10至30/70的混合物。粉末（a）包括在5KOe的最大磁化力（Hm）下矫顽力（Hc）为330至390Oe，饱和磁化强度（sigma s）为68至80emu / g的γ-Fe 2 O 3颗粒，以及比表面积为18〜25m2 / g，粉末（b）包含矫顽力（Hc）为400〜450Oe，饱和磁化强度（sigma）为65〜78emu / g的γ-Fe 2 O 3粒子磁化力（Hm）为5KOe，比表面积为22〜30m2 / g。磁带具有清晰忠实地再现高保真度的声音的能力。

35. 发明授权

US4265931A Process for the production of a magnetic recording member 失效
标题翻译：用于制造磁记录部件的方法
公开(公告)号：US4265931A
公开(公告)日：1981-05-05
申请号：US74029
申请日：1979-09-10
申请人： Yasuo Tamai , Hiroshi Ogawa
发明人： Yasuo Tamai , Hiroshi Ogawa
IPC分类号： C09D5/23 , G11B5/716 , G11B5/842 , B05D3/14
CPC分类号： G11B5/716 , G11B5/842
摘要： A process for producing a magnetic recording member comprising a non-magnetic support and a magnetic layer comprising at least two layers on the non-magnetic support which comprises the steps of:(A) providing the lower magnetic layer on the non-magnetic support;(B) bringing the lower magnetic layer into contact with an organic solvent incapable of dissolving the lower magnetic layer; and(C) providing the upper magnetic layer on the lower magnetic layer by coating thereon a magnetic coating composition, preferably containing the above organic solvent or a binder soluble in the above organic solvent.
摘要翻译：一种制造包括非磁性载体和在非磁性载体上至少包含两层的磁性层的磁性记录部件的方法，该方法包括以下步骤：（A）在非磁性载体上提供下部磁性层; （B）使下磁性层与不能溶解下磁性层的有机溶剂接触; 和（C）通过在其上涂覆优选含有上述有机溶剂或可溶于上述有机溶剂的粘合剂的磁性涂料组合物在上述下磁性层上提供上层磁性层。

36. 发明授权

US4803120A Magnetic tape having a leader tape 失效
标题翻译：带磁带的磁带
公开(公告)号：US4803120A
公开(公告)日：1989-02-07
申请号：US80153
申请日：1987-07-29
申请人： Hiroshi Ogawa , Chiaki Mizuno , Yasuo Tamai
发明人： Hiroshi Ogawa , Chiaki Mizuno , Yasuo Tamai
IPC分类号： G11B5/627
CPC分类号： G11B5/627 , Y10S428/90 , Y10T428/257 , Y10T428/265
摘要： A magnetic tape having a leader tape excellent in cleaning effect and free from change of the apppearance and decrease of the cleaning effect even after storage at high temperatures is provided. This magnetic tape has a leader tape at at least one end of the tape, the leader tape comprising a coating layer provided on the one or both sides of a support, and is characterized in that the coating layers contains an inorganic pigment powder with a grain size of 0.01 to 10 .mu.m or a mixture of an inorganic pigment powder with a grain size of 0.01 to 5 .mu.m and a resin powder with a grain size of 0.1 to 10 .mu.m, and a binder, the support has a haze of 20 to 80% and the leader tape has a percent photo-transmission of at least 20%.
摘要翻译：提供了具有清洁效果优异并且即使在高温储存后也不会改变外观和降低清洁效果的导带的磁带。该磁带在带的至少一端具有引导带，引导带包括设置在载体的一侧或两侧上的涂层，其特征在于，所述涂层含有具有颗粒的无机颜料粉末尺寸为0.01〜10μm，或粒径为0.01〜5μm的无机颜料粉末和粒径为0.1〜10μm的树脂粉末和粘合剂的混合物，所述载体的雾度为 20％至80％，导线胶带的透光率至少为20％。

37. 发明授权

US4743487A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4743487A
公开(公告)日：1988-05-10
申请号：US816872
申请日：1986-01-07
申请人： Shinji Saito , Chiaki Mizuno , Hiroshi Ogawa , Noburo Hibino , Yasuo Tamai
发明人： Shinji Saito , Chiaki Mizuno , Hiroshi Ogawa , Noburo Hibino , Yasuo Tamai
IPC分类号： G11B5/708 , C09D5/23 , C09D7/12 , C09D167/00 , C09D169/00 , C09D177/00 , G11B5/70 , G11B5/73 , G11B5/704
CPC分类号： G11B5/7305 , Y10S428/90 , Y10T428/24355
摘要： A magnetic recording medium such as an audio cassette tape or a video cassette tape comprising a flexible nonmagnetic support and a magnetic recording layer which contains a ferromagnetic cobalt-containing iron oxide, in which the nonmagnetic support has a surface of a center line average height in the range of 0.01 to 0.1 .mu.m on both sides and the magnetic recording medium has a heat shrinkage ratio of not higher than 1%, the heat shrinkage ratio being determined after allowing to stand at 110.degree. C. for 4 hours.
摘要翻译：一种诸如音频盒式磁带或盒式磁带的磁记录介质，包括柔性非磁性载体和含有铁磁性钴的氧化铁的磁记录层，其中非磁性载体具有中心线平均高度的表面两侧的0.01〜0.1μm的范围和磁记录介质的热收缩率不高于1％，热收缩率是在110℃下放置4小时后测定的。

38. 发明授权

US4710421A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4710421A
公开(公告)日：1987-12-01
申请号：US29557
申请日：1987-03-24
申请人： Toshio Ono , Yasuo Tamai , Chiaki Mizuno , Hiroshi Ogawa , Shinji Saito
发明人： Toshio Ono , Yasuo Tamai , Chiaki Mizuno , Hiroshi Ogawa , Shinji Saito
IPC分类号： G11B5/70 , C09D5/23 , C09D7/12 , G11B5/73
CPC分类号： G11B5/7305 , Y10S428/90 , Y10T428/2495 , Y10T428/24975 , Y10T428/31786
摘要： A magnetic recording medium having a heat shrinkage ratio of not higher than 1% and comprising a nonmagnetic support in the form of a tape which has a heat shrinkage ratio of not higher than 1.8%, a Young's modulus of 450 to 650 kg/mm.sup.2 in the longitudinal direction and a Young's modulus of 450 to 550 kg/mm.sup.2 in the width direction, and a magnetic recording layer provided on the support which comprises a binder and a ferromagnetic powder dispersed therein and has a squareness ratio of not less than 0.89. All the heat shrinkage ratios are values determined after being allowed to stand at 110.degree. C. for 4 hours.
摘要翻译：具有不高于1％的热收缩率的磁记录介质，其包含热收缩率不高于1.8％的带状非磁性载体，杨氏模量为450至650kg / mm2，长度方向和宽度方向的杨氏模量为450〜550kg / mm2，以及设置在载体上的磁记录层，其包含粘合剂和分散在其中的铁磁性粉末，并且具有不小于0.89的矩形比。所有的热收缩率都是在110℃下放置4小时后确定的值。

39. 发明授权

US4605597A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4605597A
公开(公告)日：1986-08-12
申请号：US642283
申请日：1984-08-20
申请人： Hiroshi Ogawa , Yasuo Tamai
发明人： Hiroshi Ogawa , Yasuo Tamai
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7023 , Y10S428/90 , Y10T428/31935
摘要： A magnetic recording medium comprising a support having coated thereon a magnetic recording layer containing a ferromagnetic powder dispersed in a binder and a vinyl chloride-vinyl acetate copolymer having a degree of polymerization from about 10 to 100 and at least one terminal carboxyl group. The magnetic recording medium contains the above copolymer in an amount of from about 0.1 to 10 wt % based on the amount of ferromagnetic powder, and preferably also contains a conventional binder. This magnetic recording medium provides both video and audio magnetic tapes having superior running properties, durability and electromagnetic properties.
摘要翻译：一种磁记录介质，包括其上涂覆有分散在粘合剂中的铁磁粉末的磁记录层和聚合度为约10至100和至少一个末端羧基的氯乙烯 - 乙酸乙烯酯共聚物的载体。磁记录介质含有上述共聚物，其含量相对于铁磁性粉末的量为约0.1〜10重量％，优选为含有常规的粘合剂。该磁记录介质提供具有优异的运行特性，耐久性和电磁特性的视频和音频磁带。

40. 发明授权

US4511484A Process for preparing magnetic coating composition 失效
标题翻译：制备磁性涂料组合物的方法
公开(公告)号：US4511484A
公开(公告)日：1985-04-16
申请号：US495869
申请日：1983-05-18
申请人： Masashi Anonuma , Yasuo Tamai , Tsunehiko Sato , Shinichi Funabashi , Hiroshi Ogawa
发明人： Masashi Anonuma , Yasuo Tamai , Tsunehiko Sato , Shinichi Funabashi , Hiroshi Ogawa
IPC分类号： G11B5/70 , C09D5/23 , G11B5/708 , G11B5/84 , G11B5/842 , H01F1/00 , H01F1/26
CPC分类号： G11B5/84 , G11B5/7085 , Y10S428/90
摘要： A process for preparing a magnetic coating composition using a dried magnetic metal powder, or a magnetic metal powder containing 50% by weight or less of a solvent is described. The process comprises adding from 0.1 to 10 parts by weight of an abrasive, from 5 to 20 parts by weight of a main binder, and from 0 to 60 parts by weight of a solvent to 100 parts by weight (calculated as a dry powder) of the magnetic metal powder and, thereafter, kneading the resulting mixture while applying a shearing stress of from about 20 to about 300 kg/cm.sup.2.
摘要翻译：描述了使用干燥的磁性金属粉末或含有50重量％以下的溶剂的磁性金属粉末制备磁性涂料组合物的方法。该方法包括将0.1至10重量份的研磨剂，5至20重量份的主粘合剂和0至60重量份的溶剂添加至100重量份（以干粉计算）的磁性金属粉末，然后在施加约20至约300kg / cm 2的剪切应力的同时捏合所得混合物。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式