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公开(公告)号：US4803121A
公开(公告)日：1989-02-07
申请号：US109013
申请日：1987-10-16
CPC分类号： G11B5/7085 , Y10S428/90 , Y10T428/257
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic fine particles, a binder, and .alpha.-alumina particles having an average size of from about 0.1 to 0.3 .mu.m, provided that the number of .alpha.-alumina particles having a particle size of larger than 0.05 .mu.m is at least equal to the number of .alpha.-alumina particles having a particle size of up to 0.05 .mu.m.
摘要翻译： 公开了一种磁记录介质，其包括非磁性载体，其上具有包含铁磁细颗粒的磁性层，粘合剂和平均尺寸为约0.1至0.3μm的α-氧化铝颗粒，条件是α 粒径大于0.05μm的氧化铝粒子至少等于粒径达0.05μm的α-氧化铝粒子的数量。
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公开(公告)号：US4868060A
公开(公告)日：1989-09-19
申请号：US38172
申请日：1987-04-14
IPC分类号： C08G18/79 , C09D5/23 , C09D175/00 , C09D175/04 , G11B5/702
CPC分类号： G11B5/7021 , C08G18/791 , Y10S428/90 , Y10T428/31547
摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic particles and a binder, said binder of the magnetic layer containing polyisocyanato-isocyanurate as a hardening component.
摘要翻译： 描述了一种磁记录介质，包括其上设置有含有铁磁颗粒和粘合剂的磁性层的非磁性载体，所述磁性层的粘合剂含有聚异氰酸酯基异氰脲酸酯作为硬化组分。
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公开(公告)号：US4734325A
公开(公告)日：1988-03-29
申请号：US784076
申请日：1985-10-04
申请人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
发明人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
IPC分类号： C09D5/23 , C09D127/04 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer being provided on one surface of the support and a backing layer being provided on the surface of the support opposite to said magnetic layer, the backing layer contains binder and non-magnetic particles comprised of (i) corbon black having an average particle size of 0.1 to 1.0 .mu.m and (ii) particles of abrasives having a Mohs' hardness of at least 6 and an average particle size of 1 .mu.m or less, with the non-magnetic particles in said backing layer being used in an amount of 40 to 300 parts by weight per 100 parts by weight of binder.
摘要翻译： 一种磁记录介质，包括在其上设置有磁性层的非磁性载体，所述磁性层设置在所述载体的一个表面上，背衬层设置在所述载体的与所述磁性层相对的表面上，所述背衬层包含粘合剂和非磁性层， 磁性粒子由（i）平均粒径为0.1〜1.0μm的cor黑，（ⅱ）莫氏硬度至少为6，平均粒径为1μm以下的磨料颗粒组成， 所述背衬层中的非磁性颗粒的使用量为每100重量份粘合剂为40至300重量份。
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公开(公告)号：US4686139A
公开(公告)日：1987-08-11
申请号：US778468
申请日：1985-09-20
申请人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
发明人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D163/00 , G11B5/73 , G11B5/735 , G11B5/68 , G11B5/708
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/265 , Y10T428/30
摘要： A magnetic recording medium is described, comprising a non-magnetic support having a magnetic layer and a backing layer which is provided on the surface of the support opposite to the magnetic layer, the backing layer containing (a) non-magnetic particles comprising carbon black having an average particle diameter of 0.1 to 1.0 .mu.m, (b) a binder comprising (i) a resin having 150 kg/cm.sup.2 or less of 100% modulus in an amount of at least 50 wt % based on the total amount of binder, and (ii) a diphenyl methane diisocyanate type hardening agent, with the amount of non-magnetic particles to total contained in the backing layer being 40 to 300 parts by weight of non-magnetic particles per 100 parts by weight of binder.
摘要翻译： 描述了一种磁记录介质，其包括具有磁性层的非磁性载体和设置在与磁性层相对的支撑体的表面上的背衬层，背衬层包含（a）包含炭黑的非磁性颗粒 平均粒径为0.1〜1.0μm，（b）粘合剂，其包含（i）相对于粘合剂的总量为150kg / cm 2以下的100质量％以上的模量为50重量％以上的树脂 ，和（ii）二苯基甲烷二异氰酸酯型硬化剂，相对于每100重量份粘合剂，背衬层中总含有的非磁性颗粒的量为40〜300重量份的非磁性颗粒。
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公开(公告)号：US4728569A
公开(公告)日：1988-03-01
申请号：US799759
申请日：1985-11-19
申请人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
发明人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25
摘要： A magnetic recording medium is described, comprising a magnetic layer coated on one side of a non-magnetic support and a backing layer coated on the opposite side of the non-magnetic support, wherein the backing layer is provided after the magnetic layer has been subjected to calendering treatment and the backing layer comprises (i) non-magnetic particles including carbon black particles having an average particle diameter of from 0.1 to 1 .mu.m and (ii) a binder composition comprising from 50 to 95 wt % of a resin having a 100% modulus at 150 kg/cm.sup.2 or less based on the total weight of the binder composition, and the weight ratio of non-magnetic particles to binder composition contained in the backing layer is from 300/100 to 40/100.
摘要翻译： 描述了一种磁记录介质，其包括涂覆在非磁性载体的一侧的磁性层和涂覆在非磁性载体的相反侧上的背衬层，其中背衬层在磁性层已经经受之后提供 对于压延处理，背衬层包括（i）包括平均粒径为0.1至1μm的碳黑颗粒的非磁性颗粒和（ii）包含50至95重量％的具有 基于粘合剂组合物的总重量为150kg / cm 2或更小的100％模量，背衬层中所含的非磁性颗粒与粘合剂组合物的重量比为300/100至40/100。
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公开(公告)号：US4649072A
公开(公告)日：1987-03-10
申请号：US779348
申请日：1985-09-23
申请人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
发明人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/24942 , Y10T428/25 , Y10T428/30 , Y10T428/31551
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer on one side and a backing layer on the other side, wherein the backing layer contains (1) non-magnetic powders containing carbon black having an average particle diameter of from 0.1 to 1 .mu.m; (2) two or more binders wherein (a) at least one of the binders is a resin having a 100% modulus of from 15 to 150 kg/cm.sup.2 in an amount of from 50 to 95 wt % based on the total amount of the binders in the backing layer, and (b) the rest binder(s) is/are a resin other than the resin having a 100% modulus of from 15 to 150 kg/cm.sup.2, and the weight ratio of all the non-magnetic powders to all the binders in the backing layer is from 300:100 to 40:100; and (3) a polyisocyanate in an amount of from 15 to 40 wt % based on the total amount of the binders in the backing layer.
摘要翻译： 一种磁记录介质，包括在一侧上设置有磁性层的磁性载体和另一侧上的背衬层，其中所述背衬层包含（1）含有平均粒径为 0.1〜1μm; （2）两种或更多种粘合剂，其中（a）至少一种粘合剂是基于总量的50至95重量％的100至100重量％的模量为15至150kg / cm 2的树脂 背衬层中的粘合剂，和（b）剩余的粘合剂是具有100％模量为15至150kg / cm 2的树脂之外的树脂，并且所有非磁性粉末的重量比 对于背衬层中的所有粘合剂为300:100至40:100; 和（3）基于背衬层中的粘合剂的总量的15至40重量％的量的多异氰酸酯。
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公开(公告)号：US4696858A
公开(公告)日：1987-09-29
申请号：US789221
申请日：1985-10-18
申请人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
发明人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25
摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer being provided on one surface of the support and a backing layer being provided on the surface of the support opposite to said magnetic layer, the backing layer containing (A) a binder comprised of resin having a 100% modulus of 150 kg/cm.sup.2 or less present in an amount of 50 to 95 wt % based on the total weight amount of binder and (B) non-magnetic particles comprised of (i) carbon black having an average particle size of more than 0.1 .mu.m to 1.0 .mu.m, and (ii) carbon black having an average particle size of 0.01 .mu.m to 0.1 .mu.m in a weight ratio of carbon black (i)/carbon black (ii) of 95/5 to 5/95, with the non-magnetic particles in the backing layer being present in an amount of 40 to 300 parts by weight per 100 parts by weight of the total binder.
摘要翻译： 描述了一种磁记录介质，包括其上设置有磁性层的非磁性载体，其设置在支撑体的一个表面上，背衬层设置在与所述磁性层相对的支撑体的表面上，背衬层包含 A）由基于粘合剂总重量的50至95重量％的量的100％模量为150kg / cm 2或更低的树脂组成的粘合剂和（B）由（i）组成的非磁性颗粒， 平均粒径大于0.1μm〜1.0μm的炭黑，（ii）碳黑（i）/炭黑（i）的重量比的平均粒径为0.01μm〜0.1μm的炭黑 （ii）为95/5至5/95，背衬层中的非磁性颗粒以每100重量份总粘合剂为40至300重量份的量存在。
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公开(公告)号：US5008147A
公开(公告)日：1991-04-16
申请号：US216566
申请日：1988-07-08
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/265 , Y10T428/30 , Y10T428/31609
摘要： A magnetic recording medium comprising a nonmagnetic support having on one surface thereof a magnetic layer and on the opposite surface thereof a backing layer comprising nonmagnetic particles dispersed in a binder, wherein said binder of said backing layer comprises from about 20 to 90 wt % of polycarbonate polyurethane, and said backing layer comprises from about 40 to 200 parts by weight of said binder per 100 parts by weight of said nonmagnetic particles.
摘要翻译： 一种磁记录介质，其包括在其一个表面上具有磁性层的非磁性载体，并且在其相对表面上具有包含分散在粘合剂中的非磁性颗粒的背衬层，其中所述背衬层的所述粘合剂包含约20至90重量％的聚碳酸酯 聚氨酯和所述背衬层每100重量份所述非磁性颗粒包含约40至200重量份的所述粘合剂。
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公开(公告)号：US4731278A
公开(公告)日：1988-03-15
申请号：US862724
申请日：1986-05-13
IPC分类号： C01G49/00 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/70 , G11B5/702 , G11B5/706 , G11B5/708 , G11B5/714 , G11B5/73 , G11B5/735 , H01F1/11
CPC分类号： G11B5/7085 , G11B5/7023 , G11B5/714 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium is described, comprising a magnetic layer containing ferromagnetic fine particles and a binder coated on one side of a non-magnetic support and a backing layer coated on the opposite side of the non-magnetic support, wherein said ferromagnetic fine particles have a cobalt content of from 2 to 10 wt % with respect to the iron oxide content thereof, the content of divalent iron (Fe.sup.2+) of from 1 to 10 wt % with respect to the trivalent iron (Fe.sup.3+) content thereof, and the specific surface area of from 30 to 50 m.sup.2 /g, said binder comprises a copolymer of vinyl chloride-vinyl acetate-maleic acid contained in an amount of 40 wt % or more with respect to the total binder content of the magnetic layer, an abrasive agent having a Mohs hardness of 6 or more is contained in said magnetic layer, and the resulting magnetic tape has a coercive force of from 750 to 900 Oe at 25.degree. C.
摘要翻译： 描述了一种磁记录介质，其包括含有铁磁细颗粒的磁性层和涂覆在非磁性载体的一侧上的粘合剂和涂覆在非磁性载体的相对侧上的背衬层，其中所述铁磁细颗粒具有 相对于其氧化铁含量为2〜10重量％的钴含量，相对于三价铁（Fe3 +）含量，二价铁（Fe 2+）的含量为1〜10重量％，比表面积 面积为30〜50m2 / g，所述粘合剂包含相对于磁性层的总粘合剂含量为40重量％以上的氯乙烯 - 乙酸乙烯酯 - 马来酸的共聚物，具有 所述磁性层中含有6以上的莫氏硬度，所得磁带在25℃下的矫顽力为750〜900Oe。
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公开(公告)号：US5094908A
公开(公告)日：1992-03-10
申请号：US558539
申请日：1990-07-27
IPC分类号： G11B5/706 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/708 , G11B5/71 , G11B5/712 , G11B5/714 , G11B5/73 , G11B5/735
CPC分类号： G11B5/735 , G11B5/7085 , G11B5/71 , G11B5/712 , G11B5/714 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium is disclosed, which comprises a non-magnetic support having on one surface of the support a backing layer containing carbon black and a binder and on the opposite surface of the support a magnetic recording layer containing a ferromagnetic power and a binder, the ferromagnetic powder being oriented in the magnetic recording layer such that the ratio of the number of diffraction points N(220)/N(113) measured at the surface region of the magnetic layer by high energy electron diffraction is at most 1.65; and the squareness ratio Br/Bm of the magnetic layer is from 0.830 to 0.860 at 25.degree. C. The medium has excellent running durability, S/N ratio, and dropout properties.
摘要翻译： 公开了一种磁记录介质，其包括非磁性支撑体，其在支撑体的一个表面上具有包含炭黑和粘合剂的背衬层，并且在支撑体的相对表面上包含含有铁磁性力和粘合剂的磁记录层， 铁磁性粉末在磁记录层中取向，使得通过高能电子衍射在磁性层的表面区域测得的衍射点数N（220）/ N（113）的比例为1.65以下; 磁性层的矩形比Br / Bm在25℃为0.830〜0.860。介质具有优异的运行耐久性，S / N比和脱落性能。
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