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公开(公告)号：US5300314A
公开(公告)日：1994-04-05
申请号：US993616
申请日：1992-12-21
CPC分类号： G11B5/848
摘要： The present invention relates to a magnetic recording medium comprising, in the following order:(a) a nonmagnetic support;(b) a nonmagnetic layer comprising nonmagnetic particles and a binder resin; and(c) a magnetic layer comprising ferromagnetic particles and a binder resin;wherein said magnetic layer has a thickness of 0.8 .mu.m or less and said nonmagnetic layer and said magnetic layer are formed by a process which comprises the steps of coating a nonmagnetic layer coating solution on said nonmagnetic support, and then subsequently coating a magnetic layer coating solution on said nonmagnetic layer coating solution wile said nonmagnetic layer is wet and, further, wherein the solvent used in said nonmagnetic layer coating solution has a higher boiling point than the solvent used in said magnetic layer coating solution.Further, the present invention relates to a process for preparing a magnetic recording medium, which comprises the steps of:(a) coating a nonmagnetic layer coating solution comprising nonmagnetic particles dispersed in a binder resin solution on a nonmagnetic support to form a nonmagnetic coating layer,(b) coating a magnetic layer coating solution comprising ferromagnetic particles dispersed in a binder resin solution on said nonmagnetic coating layer while said nonmagnetic coating layer is wet, and(c) drying to form a nonmagnetic layer and a magnetic layer on said nonmagnetic support;wherein the boiling point of the solvent used for said nonmagnetic layer coating solution is higher than the boiling point of the solvent used in said magnetic layer coating solution.
摘要翻译： 磁记录介质技术领域本发明涉及一种磁记录介质，其特征在于，包括以下顺序：（a）非磁性载体; （b）包含非磁性颗粒和粘合剂树脂的非磁性层; 和（c）包含铁磁颗粒和粘合剂树脂的磁性层; 其中所述磁性层的厚度为0.8（my）m以下，所述非磁性层和所述磁性层通过以下步骤形成，所述方法包括以下步骤：在所述非磁性载体上涂覆非磁性层涂布溶液，然后涂覆磁性层 在所述非磁性层涂布溶液上的所述非磁性层涂布溶液的层状涂层溶液是湿的，此外，其中所述非磁性层涂布溶液中使用的溶剂的沸点高于所述磁性层涂布溶液中使用的溶剂。 此外，本发明涉及一种制备磁记录介质的方法，其包括以下步骤：（a）将包含分散在粘合剂树脂溶液中的非磁性颗粒的非磁性层涂布溶液涂布在非磁性载体上以形成非磁性涂层 ，（b）在所述非磁性涂层为湿的同时，将包含分散在所述非磁性涂层上的粘结剂树脂溶液中的铁磁性粒子的磁性层涂布溶液涂布在所述非磁性载体上，并且（c）在所述非磁性载体上形成非磁性层和磁性层 ; 其中用于所述非磁性层涂布溶液的溶剂的沸点高于所述磁性层涂布溶液中使用的溶剂的沸点。
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公开(公告)号：US5179487A
公开(公告)日：1993-01-12
申请号：US831058
申请日：1992-02-04
申请人： Kazuhiro Niitsuma , Satoru Hayakawa
发明人： Kazuhiro Niitsuma , Satoru Hayakawa
CPC分类号： B32B5/08 , G11B23/0332 , G11B23/505 , Y10S428/90
摘要： A magnetic recording disk is disclosed which comprises a flexible magnetic disk comprising a nonmagnetic support having thereon a magnetic layer comprising ferromagnetic powders and binders which is rotatably loaded in a cartridge having a liner formed with a nonwoven fabric on the inside of the cartridge, wherein said liner comprises (A) two layers of a layer of the magnetic layer side comprising a nonwoven fabric of a mixed yarn of rayon fibers and polyester fibers formed on the side which contacts with the magnetic layer, and a layer of the cartridge side comprising a nonwoven fabric of acrylic fibers formed on the side which contacts with the cartridge; or (B) three layers of two layers comprising a nonwoven fabric of a mixed yarn of rayon fibers and polyester fibers, and an inter layer comprising acrylic fibers formed between the two layers.
摘要翻译： 公开了一种磁记录盘，其包括柔性磁盘，其包括非磁性载体，其上具有包含铁磁粉末和粘合剂的磁性层，所述磁性层可旋转地装载在具有在所述盒的内部上形成有无纺布的衬垫的盒中，其中所述 衬垫包括（A）两层一层磁性层一侧，其包含在与磁性层接触的侧面上形成的人造丝纤维和聚酯纤维的混合纱线的无纺织物，以及包含无纺布 形成在与盒接触的一侧上的丙烯酸纤维织物; 或（B）包含人造丝纤维和聚酯纤维的混合纱的非织造织物的两层两层，以及在两层之间形成的包含丙烯酸纤维的层。
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3.发明授权
公开(公告)号：US5384175A
公开(公告)日：1995-01-24
申请号：US959795
申请日：1992-10-13
CPC分类号： G11B5/70605 , G11B5/738 , Y10S428/90 , Y10T428/25 , Y10T428/265 , Y10T428/30
摘要： A novel magnetic recording disc is provided comprising, a nonmagnetic support having thereon a nonmagnetic layer comprising nonmagnetic particles and a binder resin, and a magnetic layer comprising ferromagnetic particles and a binder resin, in this order. The nonmagnetic particles in the nonmagnetic layer are partially or entirely electrically conductive particles, the thickness of the magnetic layer is in the range of 0.5 .mu.m or less, and the orientation ratio of the ferromagnetic particles in the magnetic layer is 0.85 or more.A novel process for preparing the magnetic recording disc is provided. Further, a novel process for recording and reproduction of a signal having a shortest recordable wavelength of 1.5 .mu.m or less is provided, which utilizes the magnetic recording disc in conjunction with a magnetic head having a gap length (.delta.) of 0.50 .mu.m or less.
摘要翻译： 提供了一种新颖的磁记录盘，其包括：非磁性载体，其上具有包含非磁性颗粒和粘合剂树脂的非磁性层，以及包含铁磁颗粒和粘合剂树脂的磁性层。 非磁性层中的非磁性颗粒是部分或全部是导电颗粒，磁性层的厚度在0.5μm或更小的范围内，并且磁性层中铁磁性颗粒的取向比为0.85以上。 提供了一种制备磁记录盘的新颖方法。 另外，提供了一种用于记录和再现具有最小可记录波长为1.5μm或更小的信号的新颖方法，其利用磁记录盘与间隙长度（delta）为0.50μm的磁头或 减。
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4.发明授权Magnetic recording disc comprising magnetic powder and a binder in a container which includes a nonwoven fabric liner comprising polypropylene and rayon fibers 失效磁性记录盘包括磁性粉末和粘合剂在容器中，该容器包括包含聚丙烯和人造纤维的非织造织物衬里
公开(公告)号：US5370917A
公开(公告)日：1994-12-06
申请号：US74668
申请日：1993-06-10
IPC分类号： G11B5/82 , G11B23/033 , G11B23/50 , G11B5/00
CPC分类号： G11B23/0332 , G11B23/505 , G11B5/825 , Y10S428/90
摘要： A magnetic recording disc is disclosed which comprises a disc container with a liner comprising nonwoven fabric in which a flexible magnetic disc comprising a flexible non-magnetic support having on at least one side thereof a magnetic layer mainly comprising a ferromagnetic powder and a binder resin is rotably set, wherein said liner comprises (1) a nonwoven fabric layer mainly comprising rayon fiber on at least the side in contact with the magnetic layer, and (2) a nonwoven fabric layer mainly comprising polypropylene fiber, and said liner comprises from 70 to 80% by weight based on the liner of rayon fiber and from 20 to 30% by weight based on the liner of polypropylene fiber.
摘要翻译： 公开了一种磁记录盘，其包括具有包括无纺织物的衬垫的盘容器，其中包括柔性非磁性支撑件的柔性磁盘在其至少一侧上具有主要包含铁磁粉末和粘合剂树脂的磁性层， 其特征在于，所述衬垫包括：（1）至少在与所述磁性层接触的一侧的主要包含人造丝纤维的非织造织物层，以及（2）主要包含聚丙烯纤维的非织造织物层，所述衬垫包括70〜 基于人造丝纤维的衬里为80重量％，基于聚丙烯纤维的衬里为20〜30重量％。
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公开(公告)号：US20050214595A1
公开(公告)日：2005-09-29
申请号：US11091401
申请日：2005-03-29
申请人： Satoru Hayakawa
发明人： Satoru Hayakawa
IPC分类号： G11B5/627 , B32B1/00 , G11B5/70 , G11B23/02 , G11B23/037 , G11B23/107 , G11B23/26
CPC分类号： G11B23/037 , G11B23/107 , G11B23/26 , Y10T428/31
摘要： A leader tape comprising a support and a coating layer containing powder and a binder, wherein at least one surface of the leader tape has a center line average surface roughness (Ra) of from 10 to 60 nm, and depression hardness (DH) defined by the following equation (1) of from 60 to 140 kg/mm2 (0.588 to 1.372 GPa): DH=3.7926×10−2[Pmax/(Hmax)2](kg/mm2) (1) wherein Pmax is a maximum load and Hmax is a maximum displacement amount of an indenter.
摘要翻译： 一种引导带，其包括载体和包含粉末和粘合剂的涂层，其中引带的至少一个表面具有10至60nm的中心线平均表面粗糙度（Ra），以及由10至60nm定义的凹陷硬度（DH） 下列公式（1）为60至140kg / mm 2（0.588至1.372GPa）：<？在线公式描述=“在线公式”end =“lead”？ > DH = 3.7926×10 -2 [Pmax /（Hmax）2]（kg / mm 2）（1）<？ -formulae description =“In-line Formulas”end =“tail”？>其中Pmax是最大载荷，Hmax是压头的最大位移量。
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公开(公告)号：US5958565A
公开(公告)日：1999-09-28
申请号：US848596
申请日：1997-04-28
CPC分类号： G11B5/7305 , G11B5/70 , G11B5/733 , G11B5/735 , Y10S428/90 , Y10T428/24975 , Y10T428/25 , Y10T428/258 , Y10T428/265
摘要： A magnetic recording tape favorably employable for computer data storage has a flexible polymer web, a magnetic recording layer arranged on one surface side of the web, and a backing layer arranged on another surface side of the web, characterized in that the recording tape has a thickness of 2 to 8 .mu.m and shows a Young's modulus of not less than 1,200 kg/mm.sup.2 in its longitudinal direction; and the backing layer has a thickness of 0.2 to 1 .mu.m and is composed of a binder, a carbon black, a non-magnetic powder I having Mohs' scale of hardness of 3 to 4.5 and another non-magnetic powder II having Mohs' scale of hardness of 5 to 9. Between the magnetic layer and the flexible polymer web, a non-magnetic undercoating layer composed of a binder and a non-magnetic powder can be provided.
摘要翻译： 有利地用于计算机数据存储的磁记录带具有柔性聚合物网，布置在网的一个表面侧的磁记录层和布置在网的另一表面侧上的背衬层，其特征在于记录带具有 厚度为2〜8μm，纵向杨氏模量为1200kg / mm2以上。 背衬层的厚度为0.2〜1μm，由粘合剂，炭黑，莫氏硬度为3〜4.5的非磁性粉末I和具有Mohs' 在硬磁性层和柔性聚合物网之间，可以提供由粘合剂和非磁性粉末组成的非磁性底涂层。
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7.发明授权
公开(公告)号：US5888637A
公开(公告)日：1999-03-30
申请号：US869314
申请日：1997-06-05
申请人： Yutaka Kakuishi , Satoru Hayakawa , Toru Nakao
发明人： Yutaka Kakuishi , Satoru Hayakawa , Toru Nakao
CPC分类号： G11B5/738 , G11B5/70 , G11B5/7305 , G11B5/735 , Y10S428/90 , Y10T428/24975 , Y10T428/25 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording tape favorably employable for computer data storage has a flexible polymer web, a magnetic recording layer arranged on one surface side of the web via a non-magnetic undercoating layer, and a back-coating layer arranged on another surface side of the web, wherein the magnetic recording tape has a thickness of not more than 8 .mu.m; the non-magnetic undercoating layer has a thickness of 0.5 to 2.0 .mu.m; the magnetic recording layer has a thickness of 0.5 to 1.0 .mu.m; the polymer web has a Young's modules of not lower than 700 kg/mm.sup.2 in its width direction; and the back-coating layer is made of a binder polymer, a carbon black and an inorganic material powder.
摘要翻译： 适用于计算机数据存储的磁记录带具有柔性聚合物网，通过非磁性底涂层布置在网的一个表面侧的磁记录层，以及布置在网的另一表面侧上的背涂层 ，其中所述磁记录带的厚度不大于8μm; 非磁性底涂层的厚度为0.5〜2.0μm; 磁记录层的厚度为0.5〜1.0μm; 聚合物纤维网在其宽度方向上具有不低于700kg / mm2的杨氏模块; 背涂层由粘合剂聚合物，炭黑和无机材料粉末制成。
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公开(公告)号：US5827600A
公开(公告)日：1998-10-27
申请号：US760199
申请日：1996-12-04
申请人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
发明人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
CPC分类号： G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , G11B5/848 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/265
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been coated on said lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has an average dry thickness (d) of not more than 1.0 .mu.m and an average thickness variation (.sup..DELTA. d) at the interface between the upper magnetic layer and lower non-magnetic layer is not more than d/2. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.
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公开(公告)号：US5795646A
公开(公告)日：1998-08-18
申请号：US763620
申请日：1996-12-04
申请人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
发明人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
CPC分类号： G11B5/848 , G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , Y10S428/90 , Y10T428/12472 , Y10T428/24355 , Y10T428/24942 , Y10T428/25 , Y10T428/253 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/265 , Y10T428/269 , Y10T428/31551 , Y10T428/31721 , Y10T428/31855
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been coated on said lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has an average dry thickness (d) of not more than 1.0 .mu.m and an average thickness variation (.sup..DELTA. d) at the interface between the upper magnetic layer and lower non-magnetic layer is not more than d/2. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.
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公开(公告)号：US4851027A
公开(公告)日：1989-07-25
申请号：US157712
申请日：1988-02-19
IPC分类号： C05G3/00
CPC分类号： C05G3/0029
摘要： By coating a solid fertilizer with a coating material comprising an aqueous emulsion of resin as the main component to form a resin film having a glass transition temperature of 60.degree. C. or higher; or by coating a solid fertilizer with a coating material comprising an aqueous emulsion of a thermoplastic resin and a melamine resin, and heating the coated fertilizer at 70.degree. C. or higher; a gradually-effective, coated fertilizer having a distinguished gradual releasability and strong resistance to caking, which have been so far regarded as difficult to be obtained in an aqueous emulsion system, can be prepared.
摘要翻译： 通过用包含树脂的水性乳液作为主要成分的涂料涂覆固体肥料，以形成玻璃化转变温度为60℃或更高的树脂膜; 或通过用包含热塑性树脂和三聚氰胺树脂的水性乳液的涂料涂覆固体肥料，并在70℃或更高温度下加热涂覆的肥料; 可以制备在水性乳液体系中被认为是难以获得的具有显着的逐渐脱模性和耐结块性的逐渐有效的包覆肥料。
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