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1. 发明授权

US11894032B2 Magnetic recording medium having characterized vertical SFD, magnetic tape cartridge, and magnetic recording reproducing device 有权
公开(公告)号：US11894032B2
公开(公告)日：2024-02-06
申请号：US18191983
申请日：2023-03-29
申请人： FUJIFILM Corporation
发明人： Eiki Ozawa , Takashi Fujimoto
IPC分类号： G11B5/706 , G11B5/702 , G11B5/712
CPC分类号： G11B5/70642 , G11B5/702 , G11B5/712
摘要： Provided are: a magnetic recording medium including a non-magnetic support and a magnetic layer containing a ferromagnetic powder, in which the ferromagnetic powder is an ε-iron oxide powder, a vertical switching field distribution SFD of the magnetic recording medium is 0.20 or more and 3.00 or less at a measurement temperature of 25° C., and an inclination of SFD obtained from SFD at a measurement temperature of 10° C., SFD at a measurement temperature of 25° C., and SFD at a measurement temperature of 40° C. is 0.003° C.−1 or more and 0.080° C.−1 or less; a magnetic tape cartridge including the magnetic recording medium which is a magnetic tape; and a magnetic recording and reproducing device including the magnetic recording medium.

2. 发明申请

US20160260448A1 DEVICES INCLUDING NEAR FIELD TRANSDUCER AND ADHESION LAYER 审中-公开
标题翻译：包括近场传感器和粘合层的设备
公开(公告)号：US20160260448A1
公开(公告)日：2016-09-08
申请号：US15062678
申请日：2016-03-07
申请人： SEAGATE TECHNOLOGY LLC
发明人： Tong Zhao , Meng Zhu , Xiaoyue Huang , Michael C. Kautzky
IPC分类号： G11B5/48 , G11B5/31
CPC分类号： G11B13/08 , G11B5/3133 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B5/702 , G11B7/1387 , G11B2005/0021
摘要： A device including a near field transducer (NFT); a write pole; at least one dielectric material positioned between the NFT and the write pole; and an adhesion layer positioned between the NFT and the at least one dielectric material.
摘要翻译：一种包括近场换能器（NFT）的装置; 写柱位于NFT和写极之间的至少一个电介质材料; 以及位于所述NFT和所述至少一种介电材料之间的粘合层。

3. 发明申请

US20050089724A1 Dual-layer data storage media having differing binder systems in each layer 审中-公开
标题翻译：在每层中具有不同粘合剂系统的双层数据存储介质
公开(公告)号：US20050089724A1
公开(公告)日：2005-04-28
申请号：US10691249
申请日：2003-10-22
申请人： Meng Hsieh , Gary Featherstone , Matthew Fraley , Stanley Busman
发明人： Meng Hsieh , Gary Featherstone , Matthew Fraley , Stanley Busman
IPC分类号： G11B5/702 , G11B5/708 , G11B5/714 , G11B5/738 , G11B5/735 , G11B5/71
CPC分类号： G11B5/708 , G11B5/702 , G11B5/7021 , G11B5/7023 , G11B5/714 , G11B5/73 , G11B5/735
摘要： A dual-layer magnetic recording medium comprising a non-magnetic substrate having a front side and a back side, the front side having at least one lower support layer formed over the substrate and at least one magnetic upper layer formed over the at least one support layer, wherein the magnetic upper layer includes magnetic pigment particles having an average particle length of less than about 75 nanometers, and a binder system for the magnetic particles, and the lower support layer includes at least one non-magnetic pigment and a binder system therefor, said binder system having a lower Tg from said binder system for said upper layer, said magnetic recording medium having two edges, said magnetic recording medium exhibiting substantially less cracking on said edges when compared to a dual-layer magnetic recording medium comprising a magnetic upper layer and a lower support layer having substantially identical binder systems.
摘要翻译：一种双层磁记录介质，包括具有前侧和后侧的非磁性基板，所述前侧具有形成在所述基板上的至少一个下支撑层，以及形成在所述至少一个支撑件上的至少一个磁上层层，其中所述磁性上层包括平均颗粒长度小于约75纳米的磁性颜料颗粒和用于磁性颗粒的粘合剂体系，并且所述下部支撑层包括至少一种非磁性颜料及其粘合剂体系所述粘合剂体系具有来自所述上层的所述粘合剂体系的较低的Tg，所述磁记录介质具有两个边缘，当与包含磁性上层的双层磁记录介质相比时，所述磁记录介质在所述边缘上表现出显着更小的裂纹层和具有基本相同的粘合剂体系的下支撑层。

4. 发明申请

US20050008875A1 Glass composite including dispersed rare earth iron garnet nanoparticles 失效
标题翻译：玻璃复合材料包括分散的稀土铁石榴石纳米粒子
公开(公告)号：US20050008875A1
公开(公告)日：2005-01-13
申请号：US10914288
申请日：2004-08-10
申请人： Susamu Taketomi , Christopher Sorensen , Kennth Klabunde
发明人： Susamu Taketomi , Christopher Sorensen , Kennth Klabunde
IPC分类号： C03C14/00 , G11B5/702 , G11B5/84 , G11B11/105 , B32B17/06
CPC分类号： G11B11/10582 , C03C14/006 , C03C2214/16 , C03C2214/30 , G11B5/702 , G11B5/70626 , G11B5/84
摘要： Glass/nanoparticle composites are provided which include a glass matrix with a high density of heterologous nanoparticles embedded therein adjacent the outer surfaces of the composite. Preferably, the glass matrix is formed of porous glass and the nanoparticles are yttrium-iron nanocrystals which exhibit the property of altering the polarization of incident electromagnetic radiation; the composites are thus suitable for use in electrooptical recording media. In practice, a glass matrix having suitable porosity is contacted with a colloidal dispersion containing amorphous yttrium-iron nanoparticles in order to embed the nanoparticles within the surface pores of the matrix. The treated glass matrix is then heated under time-temperature conditions to convert the amorphous nanoparticles into a crystalline state while also fusing the glass matrix pores. Nanoparticle loadings on the order of 109 nanoparticles/mm2 of glass surface area are possible, allowing construction of recording media having a recordable data density many times greater than conventional media.
摘要翻译：提供玻璃/纳米颗粒复合材料，其包括嵌入复合材料外表面的高密度异源纳米颗粒的玻璃基质。优选地，玻璃基体由多孔玻璃形成，并且纳米颗粒是表现出改变入射电磁辐射的极化性质的钇 - 铁纳米晶体; 因此该复合材料适用于电光记录介质。在实践中，具有合适孔隙率的玻璃基质与含有无定形钇 - 铁纳米颗粒的胶态分散体接触，以将纳米颗粒嵌入基质的表面孔内。然后将经处理的玻璃基质在时间温度条件下加热以将无定形纳米颗粒转化为结晶状态，同时还熔合玻璃基质孔。玻璃表面积为10 9纳米颗粒/ mm 2的纳米粒子载量是可能的，允许构建具有比常规介质多数倍的可记录数据密度的记录介质。

5. 发明授权

US6037037A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US6037037A
公开(公告)日：2000-03-14
申请号：US110794
申请日：1998-07-06
申请人： Kazunori Kubota , Fumio Echigo , Yukihiro Shimasaki , Takumi Haneda , Hirofumi Ito , Tetuo Fuchi , Kiyoshi Kobata
发明人： Kazunori Kubota , Fumio Echigo , Yukihiro Shimasaki , Takumi Haneda , Hirofumi Ito , Tetuo Fuchi , Kiyoshi Kobata
IPC分类号： G11B5/70 , G11B5/702 , G11B5/73 , G11B5/738 , G11B5/68
CPC分类号： G11B5/70 , G11B5/702 , G11B5/7021 , G11B5/7022 , G11B5/738 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/257
摘要： The present invention provides a thin multilayer magnetic recording medium having improved electromagnetic conversion property and durability, comprising coating layers of a lower non-magnetic layer and an upper magnetic layer. The non-magnetic layer of this magnetic recording medium comprises a non-magnetic needle body having an average major axis length of 0.25 to 1.0 .mu.m and an average minor axis length of 0.005 to 0.0151 .mu.m, a first binding resin having a glass transition temperature (Tg.sub.1) of 30 to 50.degree. C., and fatty acid ester. The content of the first binding resin is 15 to 30 wt % with respect to the non-magnetic needle body. The content of the fatty acid ester is 2 to 15 wt % with respect to the first binding resin. The magnetic layer having a dry thickness of 0.5 .mu.m or less comprises ferromagnetic powder and a second binding resin having a glass transition temperature (Tg.sub.2) of 40 to 70.degree. C. Tg.sub.1 is at least 5.degree. C. lower than Tg.sub.2, and the entire thickness comprising the layers and the film is 12 .mu.m or less.
摘要翻译：本发明提供具有改善的电磁转换性能和耐久性的薄多层磁记录介质，其包括下层非磁性层和上层磁性层的涂层。该磁记录介质的非磁性层包括平均长轴长度为0.25〜1.0μm，平均短轴长度为0.005〜0.0151μm的非磁性针体，具有玻璃化转变温度的第一粘合树脂温度（Tg1）为30〜50℃，脂肪酸酯。第一粘合树脂的含量相对于非磁针体为15〜30重量％。相对于第一粘合树脂，脂肪酸酯的含量为2〜15重量％。干燥厚度为0.5μm以下的磁性层包含铁磁粉末和玻璃化转变温度（Tg2）为40〜70℃的第二粘合树脂，Tg1比Tg2低至少5℃，包含层和膜的整个厚度为12μm或更小。

6. 发明授权

US5780167A Magnetic recording medium having a binder comprising a star block polymer with dispersing groups 失效
标题翻译：具有粘合剂的磁记录介质包含具有分散基团的星形嵌段聚合物
公开(公告)号：US5780167A
公开(公告)日：1998-07-14
申请号：US741753
申请日：1996-11-05
申请人： William E. Bottomley , Colin F. Norman
发明人： William E. Bottomley , Colin F. Norman
IPC分类号： C09D5/23 , C08F8/44 , C09D153/00 , G11B5/702
CPC分类号： G11B5/7023 , C08F8/44 , C09D153/00 , G11B5/702 , Y10S428/90 , Y10T428/31931 , Y10T428/31938
摘要： A magnetic recording medium comprising a substrate having a surface bearing a magnetizable coating wherein said magnetizable coating comprises a magnetic pigment dispersed in a polymeric binder, said polymer binder comprises a star block copolymer having a two phase morphology and comprising a pendant dispersing group.
摘要翻译：一种磁记录介质，包括具有可磁化涂层的表面的基底，其中所述可磁化涂层包含分散在聚合物粘合剂中的磁性颜料，所述聚合物粘合剂包含具有两相形态并包含侧分散基团的星形嵌段共聚物。

7. 发明授权

US5436070A Magnetic recording medium comprising a polyoxyalkylene oxide binder, a phosphoric ester dispersant and a cicular magnetic powder 失效
标题翻译：包含聚氧化烯粘合剂，磷酸酯分散剂和针状磁性粉末的磁记录介质
公开(公告)号：US5436070A
公开(公告)日：1995-07-25
申请号：US311031
申请日：1994-09-26
申请人： Wolf-Dieter Schroer , Attila Vass , Juergen Sauter , Juergen Schmidt , Guenther Kuntz
发明人： Wolf-Dieter Schroer , Attila Vass , Juergen Sauter , Juergen Schmidt , Guenther Kuntz
IPC分类号： G11B5/708 , C09D5/23 , G11B5/70 , G11B5/702 , G11B5/712 , G11B5/714 , G11B5/73 , G11B5/842 , G11B5/00
CPC分类号： G11B5/714 , G11B5/70 , G11B5/7013 , G11B5/702 , G11B5/7022 , G11B5/712 , G11B5/842 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/26 , Y10T428/2991 , Y10T428/2998
摘要： A magnetic dispersion comprising finely divided iron power or iron alloy powder having a BET value of more than 35 m.sup.2 /g dispersed in a polymeric binder and organic solvent, whose filterability is markedly improved, is obtained by using certain low molecular weight phosphoric esters of the general formula I or II ##STR1## combined with a dispersion-active compound which contains at least one polar group capable of adsorption on the magnetic pigment. The polar group of the dispersion-active compound can be an acid or alkaline or amphoteric group or a group capable of hydrogen bonding or polarization. The dispersion-active compound can be a polycondensate, a polyaddition product or a chain growth copolymer which can also be used in the magnetic dispersion combined with customary other polymeric binders.
摘要翻译：通过使用某些低分子量磷酸酯，可以获得包含分散在聚合物粘合剂中的BET值大于35m 2 / g的细分铁粉或铁合金粉末的磁性分散体，其过滤性明显改善，通式I或II与含有至少一个能够在磁性颜料上吸附的极性基团的分散体活性化合物组合。分散活性化合物的极性基团可以是酸或碱性或两性基团或能够键合或极化的基团。分散体活性化合物可以是缩聚物，加聚产物或链增长共聚物，其也可以用于与常规其它聚合物粘合剂组合的磁性分散体中。

8. 发明授权

US5082717A Styrene-based resin composite material 失效
标题翻译：基于苯乙烯的树脂复合材料
公开(公告)号：US5082717A
公开(公告)日：1992-01-21
申请号：US443937
申请日：1989-11-30
申请人： Atsunori Yaguchi , Keisuke Funaki
发明人： Atsunori Yaguchi , Keisuke Funaki
IPC分类号： C07F9/6581 , C08J7/04 , G11B5/702 , G11B5/725 , G11B5/73 , G11B5/735
CPC分类号： C08J7/047 , C07F9/65814 , G11B5/702 , G11B5/7023 , G11B5/7026 , G11B5/725 , G11B5/7305 , G11B5/735 , C08J2325/06 , C08J2485/00 , Y10S428/90 , Y10T428/24901 , Y10T428/31507 , Y10T428/31533 , Y10T428/3154 , Y10T428/31663 , Y10T428/31786 , Y10T428/31833 , Y10T428/31837 , Y10T428/31913 , Y10T428/3192 , Y10T428/31931
摘要： Disclosed are a styrene-based resin composite material in which a layer composed mainly of a curable phosphazene compound is formed on the surface of a molding material of a styrene-based polymer having a mainly syndiotactic configuration or a composition thereof, and also an ink ribbon in which an ink layer is provided on one side of a film of the above polymer of a composition thereof and a heat resistant lubricating layer composed mainly of the curable phosphazene compound provided on the side opposite thereto, and also a magnetic recording medium characterized in that a magnetic layer containing the curable phosphazene compound as a binder on a support composed of the above polymer or a composition thereof, a over coated layer of a magnetic recording medium which contains the curable phosphazene compound and a lubricating layer of a magnetic recording medium which contains the curable phosphazene compound.

9. 发明授权

US5041336A Magnetic recording medium using a binder resin containing a polar group, and a lubricant system comprising two types of fatty acid esters and one fatty acid 失效
标题翻译：使用含有极性基团的粘合剂树脂的磁记录介质和包含两种脂肪酸酯和一种脂肪酸的润滑剂体系
公开(公告)号：US5041336A
公开(公告)日：1991-08-20
申请号：US251437
申请日：1988-09-30
申请人： Takao Ohya , Yasuo Nishikawa , Akihiro Matsufuji , Akira Kasuga , Kiyomi Ejiri
发明人： Takao Ohya , Yasuo Nishikawa , Akihiro Matsufuji , Akira Kasuga , Kiyomi Ejiri
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C10M105/34 , C10M105/38 , C10N40/18 , G11B5/702 , G11B5/708 , G11B5/71
CPC分类号： G11B5/71 , G11B5/702 , G11B5/7021 , G11B5/7023 , Y10S428/90 , Y10T428/31551 , Y10T428/3158 , Y10T428/31786
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder,wherein said binder comprises a polymer containing a polar group selected from --SO.sub.3 M, --OSO.sub.3 M, --COOM, ##STR1## where M represents a hydrogen atom, Li, Na, K or NR.sub.4 where R represents a hydrogen atom or an alkyl group, and M' represents a hydrogen atom, Li, Na, K, an alkyl group or NR.sub.4 where R represents a hydrogen atom or an alkyl group, andsaid magnetic layer contains at least one fatty acid ester compound represented by formula (I), at least one fatty acid ester compound represented by formula (II), and at least one fatty acid having from 11 to 35 carbon atoms: ##STR2## wherein R.sup.1 represents a linear or branched chain hydrocarbon group having from 11 to 35 carbon atoms, R.sup.2 represents a linear or branched chain hydrocarbon group having from 1 to 8 carbon atoms or a phenyl group, X represents a hydrogen atom or a methyl group, and n represents an integer of from 2 to 200; ##STR3## wherein R.sup.3 represents a linear or branched chain hydrocarbon group having from 11 to 35 carbon atoms and R.sup.4 represents a linear or branched chain hydrocarbon group having from 1 to 8 carbon atoms.
摘要翻译：一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁粉末的磁性层，其中所述粘合剂包含含有选自-SO 3 M，-OSO 3 M，-COOM，中的极性基团的聚合物，其中 M表示氢原子，Li，Na，K或NR4，其中R表示氢原子或烷基，M'表示氢原子，Li，Na，K，烷基或NR4，其中R表示氢原子或烷基，所述磁性层含有至少一种由式（I）表示的脂肪酸酯化合物，至少一种由式（II）表示的脂肪酸酯化合物和至少一种具有11至35个碳原子的脂肪酸（Ⅰ）其中R1表示碳原子数为11〜35的直链或支链烃基，R2表示碳原子数为1〜8的直链或支链烃基或苯基，X表示氢原子原子或甲基， n表示2〜200的整数，（II）其中R 3表示具有11至35个碳原子的直链或支链烃基，R 4表示具有1至8个碳原子的直链或支链烃基。

10. 发明授权

US5006406A Magnetic recording media 失效
标题翻译：磁记录媒体
公开(公告)号：US5006406A
公开(公告)日：1991-04-09
申请号：US243094
申请日：1988-09-12
申请人： Jenoe Kovacs , Milena Melzer , Werner Balz , Werner Lenz , Werner Loch , Helmut Jakusch
发明人： Jenoe Kovacs , Milena Melzer , Werner Balz , Werner Lenz , Werner Loch , Helmut Jakusch
IPC分类号： G11B5/706 , C09D5/23 , C09D7/12 , C09D167/00 , C09D177/00 , C09D183/04 , G11B5/70 , G11B5/702 , G11B5/708 , G11B5/71
CPC分类号： G11B5/71 , G11B5/70 , G11B5/702 , G11B5/7085 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： In magnetic recording media which have at least one magnetizable layer firmly applied to a nonmagnetic base, the magnetizable layer essentially consists of a magnetic material finely dispersed in an organic polymer binder, a dispersant, a lubricant and other conventional additives.
摘要翻译：在具有牢固地施加到非磁性基底上的至少一个可磁化层的磁记录介质中，可磁化层基本上由细分散在有机聚合物粘合剂，分散剂，润滑剂和其它常规添加剂中的磁性材料组成。

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