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公开(公告)号：US4444842A
公开(公告)日：1984-04-24
申请号：US358564
申请日：1982-03-16
CPC分类号： G11B5/73 , G11B5/725 , Y10S428/90 , Y10T428/27 , Y10T428/31663
摘要： A magnetic recording medium is disclosed which is comprised of a non-magnetic support base having a magnetic layer on one surface and a silicone oil layer formed on the opposite surface. The silicone oil layer does not produce dropouts and eliminates scraping and therefore eliminates dust particles that collect and build up in the area of the magnetic head. The silicone layer is formed from a silicone-containing compound having a viscosity of at least 6,000 centistokes at 25.degree. C.
摘要翻译： 公开了一种磁记录介质，其包括在一个表面上具有磁性层的非磁性支撑基底和在相对表面上形成的硅油层。 硅油层不会产生脱落并消除刮擦，因此消除了在磁头区域收集和积聚的灰尘颗粒。 硅氧烷层由25℃粘度至少为6,000厘沲的含硅酮化合物形成。
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公开(公告)号：US4391851A
公开(公告)日：1983-07-05
申请号：US353791
申请日：1982-03-02
申请人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida , Masaaki Fujiyama
发明人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida , Masaaki Fujiyama
CPC分类号： G11B5/84 , G11B5/7021
摘要： A process for producing a magnetic recording medium is disclosed. The process involves coating a non-magnetic base with magnetic coating solution containing fine ferromagnetic particles and a binder comprising nitrocellulose, polyol and an isocyanate having at least two isocyanato groups. In the process, the web having 0.3 to 3 wt % of the residual solvent in the magnetic layer is calendered, and the calendered web is then dried thoroughly.
摘要翻译： 公开了一种制造磁记录介质的方法。 该方法包括用含有细铁磁颗粒的磁性涂层溶液和包含硝化纤维素，多元醇和具有至少两个异氰酸酯基的异氰酸酯的粘合剂涂覆非磁性碱。 在该方法中，将磁性层中的残留溶剂的0.3〜3重量％的纤维网压延，然后将压延纤维网彻底干燥。
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公开(公告)号：US4135032A
公开(公告)日：1979-01-16
申请号：US835376
申请日：1977-09-21
申请人： Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
发明人： Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
CPC分类号： G11B5/70 , G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/258 , Y10T428/265
摘要： A magnetic recording medium comprising a non-magnetizable plastic film support having a magnetic recording layer on one side thereof and, on the other side thereof, a layer containing (1) at least one powder of carbon black or graphite, and (2) at least one powder of a white pigment or a light colored pigment, and (3) a binder, powders (1) and (2) forming divided color areas in the back surface layer, and the back surface layer having a surface electrical resistance below 1 .times. 10.sup.10 ohm/cm.sup.2.
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公开(公告)号：US4128673A
公开(公告)日：1978-12-05
申请号：US818706
申请日：1977-07-25
申请人： Kenzi Watanabe , Masaaki Fujiyama
发明人： Kenzi Watanabe , Masaaki Fujiyama
CPC分类号： G11B5/84
摘要： In a method for super calendering a magnetic recording element comprising a non-magnetic flexible support having provided thereon a magnetic layer mainly composed of ferromagnetic powders and a binder using a super calendering roll assembly having a metal roll in contact with the magnetic layer side and an elastic roll in contact with the support side opposite the metal roll, which comprises pressing the surface of the magnetic layer to thereby super calender the same, at least the surface area of the elastic roll comprises a polyamide resin having a Shore hardness D of at least about 70 and having a linear expansion coefficient of at least about 8 .times. 10.sup.-5 /.degree. C.An improved super calendering roll assembly for magnetic tape which comprises a metal roll axis having provided therearound an elastic roll and further having provided endplates around the metal roll axis at two positions which are longer than the length of the elastic roll in the direction of the axis thereof and are at a length corresponding to the thermal expansion point of the elastic roll, at least the surface area of the elastic roll thus provided comprising a polyamide resin as defined above.Magnetic tapes having excellent surface properties can thus be obtained, which are suitable for use as video tapes, memory tapes and audio tapes requiring decreased chromanoise and high sensitivity.
摘要翻译： 在一种用于超级压光的磁记录元件的方法中，所述磁记录元件包括非磁性柔性支撑件，其上设置有主要由铁磁粉末构成的磁性层和使用具有与磁性层侧接触的金属辊的超压光辊组件的粘结剂， 与金属辊相对的支撑面接触的弹性辊，其包括压制磁性层的表面，从而对其进行超级压光，至少弹性辊的表面积至少包括具有至少肖氏硬度D的聚酰胺树脂 约70，线性膨胀系数为至少约8×10-5 /℃。
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公开(公告)号：US4117190A
公开(公告)日：1978-09-26
申请号：US516315
申请日：1974-10-21
申请人： Goro Akashi , Osamu Suzuki , Masaaki Fujiyama
发明人： Goro Akashi , Osamu Suzuki , Masaaki Fujiyama
CPC分类号： G11B5/72 , G11B5/708 , Y10S428/90 , Y10T428/25 , Y10T428/252 , Y10T428/256 , Y10T428/257 , Y10T428/259
摘要： By incorporating 5 to 15 parts by weight of a finely divided powder having high hardness and a particle size of less than 10.mu. with 100 parts by weight of graphite powder with 20 to 50 parts by weight of a binder in a graphite layer of a magnetic recording medium which comprises a support, a magnetizable layer and a graphite layer provided on the opposite side of the support from the magnetizable layer, a reduction in the abrasion and the destruction of the graphite layer during running can be reduced.
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公开(公告)号：US4002804A
公开(公告)日：1977-01-11
申请号：US600689
申请日：1975-07-31
CPC分类号： G11B5/714 , G11B5/706 , G11B5/70694 , Y10S428/90 , Y10T428/24975
摘要： A magnetic recording material which comprises a support having thereon a magnetic recording layer comprising a ferromagnetic substance and a binder, wherein the ferromagnetic substance comprises a mixture of (1) a Berthollide iron oxide having a particle size of about 0.5 .mu. or larger and a degree of oxidation represented by the value of x in FeO.sub.x of 1.33
摘要翻译： 一种磁记录材料，包括其上具有包含铁磁性物质和粘合剂的磁记录层的载体，其中所述铁磁性物质包含（1）粒径为约0.5μm或更大的Berthollide氧化铁和 的FeOx中的x值为1.33
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公开(公告)号：US5632789A
公开(公告)日：1997-05-27
申请号：US575017
申请日：1995-12-19
申请人： Katsumi Ryoke , Kazuko Hanai , Masaaki Fujiyama
发明人： Katsumi Ryoke , Kazuko Hanai , Masaaki Fujiyama
摘要： An abrasive tape comprises a substrate and an abrasive layer, which is overlaid on the substrate and is constituted of fine abrasive grains and a binder, wherein the abrasive layer contains an alkyl sulfosuccinic acid salt ester. The abrasive tape gives little scratching and little chipping to materials to be abraded and has a sufficiently high abrasive powder.
摘要翻译： 研磨带包括基材和磨料层，其覆盖在基材上并由细磨料颗粒和粘合剂构成，其中磨料层含有烷基磺基琥珀酸盐酯。 研磨带几乎不会刮伤并且几乎没有被磨损的材料的碎屑并且具有足够高的磨料粉末。
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公开(公告)号：US5075180A
公开(公告)日：1991-12-24
申请号：US337780
申请日：1989-04-13
申请人： Tadashi Ishikuro , Shinobu Iida , Masaaki Fujiyama
发明人： Tadashi Ishikuro , Shinobu Iida , Masaaki Fujiyama
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/31609
摘要： A magnetic recording medium comprising a support having provided on one surface thereof a magnetic layer, and on the opposite surface thereof a backing layer comprising nonmagnetic particles dispersed in a binder, wherein the binder in the backing layer comprises a vinyl chloride-vinyl acetate copolymer of from 50 to 80 parts by weight, a polyester resin of from 1 to 40 parts by weight, and a polyisocyanate of from 10 to 49 parts by weight, per 100 parts by weight of the binder.
摘要翻译： 一种磁记录介质，包括在其一个表面上设置有磁性层的支撑体，在其相对表面上具有分散在粘合剂中的非磁性颗粒的背衬层，其中背衬层中的粘合剂包含氯乙烯 - 乙酸乙烯酯共聚物 50〜80重量份，1〜40重量份的聚酯树脂和10〜49重量份的多异氰酸酯。
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公开(公告)号：US5036629A
公开(公告)日：1991-08-06
申请号：US614945
申请日：1990-11-19
申请人： Tadashi Ishikuro , Shinobu Iida , Masaaki Fujiyama
发明人： Tadashi Ishikuro , Shinobu Iida , Masaaki Fujiyama
CPC分类号： G11B5/70678 , G11B5/84
摘要： A method for preparing a magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer comprised of ferromagnetic particles of hexagonal crystalline ferrite which comprises smoothing the surface of the magnetic layer and thereafter abrading the surface thereof by an abrasive tape.
摘要翻译： 一种制备磁记录介质的方法，该磁记录介质包括其上具有由六方晶结构铁氧体的铁磁性颗粒构成的磁性层的非磁性载体，该磁性层包括使磁性层的表面平滑，然后用砂带研磨其表面。
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公开(公告)号：US4922675A
公开(公告)日：1990-05-08
申请号：US337778
申请日：1989-04-13
申请人： Masami Sato , Masaaki Fujiyama , Takashi Iwasaki , Masami Suzuki , Takashi Yoneyama , Hideaki Kosha
发明人： Masami Sato , Masaaki Fujiyama , Takashi Iwasaki , Masami Suzuki , Takashi Yoneyama , Hideaki Kosha
CPC分类号： G11B5/1871 , B24B21/16 , B24D11/00 , B24D3/004 , B24D3/28 , B24D3/346 , Y10T428/24983 , Y10T428/259
摘要： An abrasive tape comprises a flexible substrate and an abrasive layer which is overlaid on the flexible substrate and which contains abrasive grains and a binder. The abrasive grains comprise first abrasive grains, which have a mean grain diameter within the range of 0.07 .mu.m to 0.40 .mu.m and a Mohs hardness within the range of 5 to 7, and second abrasive grains, which have a mean grain diameter within the range of 0.20 .mu.m to 0.60 .mu.m and a Mohs hardness not lower than 8.5.
摘要翻译： 研磨带包括柔性基底和覆盖在柔性基底上并含有磨料颗粒和粘合剂的磨料层。 磨粒包含第一磨粒，其平均粒径在0.07μm至0.40μm的范围内，莫氏硬度在5至7的范围内，第二磨粒的平均粒径在 范围为0.20〜0.60μm，莫氏硬度不低于8.5。
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