专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US06352776B1 Magnetic recording medium, non-magnetic acicular black iron-based composite particles and process for producing the particles 有权
标题翻译：磁记录介质，非磁性针状黑铁基复合颗粒及其制备方法
公开(公告)号：US06352776B1
公开(公告)日：2002-03-05
申请号：US09632096
申请日：2000-08-02
申请人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Hiroko Morii
发明人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Hiroko Morii
IPC分类号： G11B5733
CPC分类号： B82Y30/00 , C01P2004/03 , C01P2004/04 , C01P2004/10 , C01P2004/20 , C01P2004/32 , C01P2004/38 , C01P2004/50 , C01P2004/51 , C01P2004/54 , C01P2004/62 , C01P2004/64 , C01P2004/80 , C01P2004/82 , C01P2004/84 , C01P2004/86 , C01P2006/12 , C01P2006/19 , C01P2006/22 , C01P2006/40 , C01P2006/42 , C01P2006/60 , C01P2006/62 , C01P2006/80 , C01P2006/90 , C09C1/24 , C09C3/006 , C09C3/12 , G11B5/738 , Y10S428/90 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995 , Y10T428/2998
摘要： A magnetic recording medium of the present invention comprises: a non-magnetic base film; a non-magnetic undercoat layer formed on the non-magnetic base film, comprising a binder resin and non-magnetic acicular black iron-based composite particles; and a magnetic coating film comprising a binder resin and magnetic particles, the non-magnetic acicular black iron-based composite particles comprising: acicular hematite particles or acicular iron oxide hydroxide particles (core particles) having an average major axis diameter of 0.01 to 0.3 &mgr;m; a coating layer formed on the surface of the particles, comprising a specific organosilicon compound; and a carbon black coat composed of at least two carbon black layers integrally formed on the coating layer, adhered with each other through an adhesive on the coating layer.
摘要翻译：本发明的磁记录介质包括：非磁性基膜;在非磁性基膜上形成的非磁性底涂层，包含粘合剂树脂和非磁性针状黑铁基复合颗粒; 和包含粘合剂树脂和磁性颗粒的磁性涂膜，所述非磁性针状黑色铁基复合颗粒包括：平均长径为0.01至0.3μm的针状赤铁矿颗粒或针状铁氧化物氢氧化物颗粒（核心颗粒）; 形成在颗粒表面上的涂层，其包含特定的有机硅化合物; 以及由涂覆层一体形成的至少两个碳黑层构成的炭黑涂层，通过涂层上的粘合剂彼此粘合。

22. 发明授权

US06287668B1 Magnetic recording medium and substrate therefor 有权
标题翻译：磁记录介质及其基板
公开(公告)号：US06287668B1
公开(公告)日：2001-09-11
申请号：US09523646
申请日：2000-03-10
申请人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Hiroko Morii
发明人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Hiroko Morii
IPC分类号： G11B5733
CPC分类号： B82Y30/00 , C01P2004/03 , C01P2004/04 , C01P2004/10 , C01P2004/20 , C01P2004/32 , C01P2004/38 , C01P2004/50 , C01P2004/51 , C01P2004/54 , C01P2004/62 , C01P2004/64 , C01P2004/80 , C01P2004/82 , C01P2004/84 , C01P2004/86 , C01P2006/12 , C01P2006/19 , C01P2006/22 , C01P2006/40 , C01P2006/42 , C01P2006/60 , C01P2006/62 , C01P2006/80 , C09C1/24 , C09C3/006 , C09C3/12 , G11B5/738 , Y10S428/90 , Y10T428/24355 , Y10T428/257 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995
摘要： A magnetic recording medium of the present invention comprises: a non-magnetic base film; a non-magnetic undercoat layer formed on said non-magnetic base film, comprising a binder resin and non-magnetic acicular black iron-based composite particles; and a magnetic coating film comprising a binder resin and magnetic particles, said non-magnetic acicular black iron-based composite particles comprising: acicular hematite particles or acicular iron oxide hydroxide particles having an average major axis diameter of 0.02 to 0.30 &mgr;m; a coating layer formed on the surface of said acicular hematite particle or acicular iron oxide hydroxide particle, comprising a specific organosilicon compound; and a carbon black coat formed on said coating layer. Such a magnetic recording medium has a more smooth surface, a high strength and a lower light transmittance and a low electric resistance even at a small carbon black content.
摘要翻译：本发明的磁记录介质包括：非磁性基膜;在所述非磁性基膜上形成的非磁性底涂层，包括粘合剂树脂和非磁性针状黑铁基复合颗粒; 以及包含粘合剂树脂和磁性颗粒的磁性涂膜，所述非磁性针状黑铁基复合颗粒包括：平均长轴直径为0.02至0.30μm的针状赤铁矿颗粒或针状铁氧化物氢氧化物颗粒; 形成在所述针状赤铁矿颗粒或针状铁氧化物氢氧化物颗粒的表面上的涂层，其包含特定的有机硅化合物; 以及形成在所述涂层上的炭黑涂层。即使在小的炭黑含量下，这种磁记录介质具有更光滑的表面，高强度和更低的透光率和低的电阻。

23. 发明授权

US6124022A Acicular hematite particles for non-magnetic undercoat layer of magnetic recording medium, and magnetic recording medium using the same 失效
标题翻译：用于磁记录介质的非磁性底涂层的针状赤铁矿颗粒和使用其的磁记录介质
公开(公告)号：US6124022A
公开(公告)日：2000-09-26
申请号：US199817
申请日：1998-11-25
申请人： Kazuyuki Hayashi , Yasuyuki Tanaka , Keisuke Iwasaki , Hiroko Morii
发明人： Kazuyuki Hayashi , Yasuyuki Tanaka , Keisuke Iwasaki , Hiroko Morii
IPC分类号： C01G49/06 , G11B5/733
CPC分类号： C01G49/06 , B82Y30/00 , G11B5/738 , C01P2002/52 , C01P2004/10 , C01P2004/51 , C01P2004/54 , C01P2004/62 , C01P2004/64 , C01P2006/12 , C01P2006/22 , C01P2006/42 , Y10S428/90 , Y10T428/24355 , Y10T428/257 , Y10T428/2982 , Y10T428/2991
摘要： Acicular hematite particles of the present invention comprise a geometrical standard deviation of major axis diameter of not more than 1.50, a geometrical standard deviation of minor axis diameter of not more than 1.35, a BET specific surface area of 35.9 to 150 m.sup.2 /g and an average major axis diameter of 0.004 to 0.295 .mu.m. Such acicular hematite particles are suitable as non-magnetic particles for a non-magnetic undercoat layer of a magnetic recording medium having a low light transmittance, an excellent smooth surface, a high mechanical strength and an excellent durability.
摘要翻译：本发明的针状赤铁矿颗粒包括长轴直径的几何标准偏差不大于1.50，短轴直径的几何标准偏差不大于1.35，BET比表面积为35.9至150m 2 / g，平均长轴直径为0.004〜0.295亩。这种针状赤铁矿颗粒适用于具有低透光率，优异的光滑表面，高机械强度和优异的耐久性的磁记录介质的非磁性底涂层的非磁性颗粒。

24. 发明授权

US5750250A Hematite particles and magnetic recording medium having a non-magnetic under-coat layer containing hematite (Fe.sub.2 O.sub.3) particles. 失效
标题翻译：赤铁矿颗粒和含有赤铁矿（Fe2O3）颗粒的非磁性底涂层的磁记录介质。
公开(公告)号：US5750250A
公开(公告)日：1998-05-12
申请号：US733790
申请日：1996-10-18
申请人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Hiroko Morii
发明人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Hiroko Morii
IPC分类号： G11B5/738 , G11B5/708
CPC分类号： G11B5/738 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/265 , Y10T428/2982 , Y10T428/2991
摘要： Hematite particles for a non-magnetic undercoat layer for a magnetic recording medium, comprise: high-density acicular hematite particles having an average major axial diameter of not more than 0.3 .mu.m, a major axial diameter distribution in geometrical standard of not more than 1.50 and a BET specific surface area of not less than 35 m.sup.2 /g, showing a pH of not less than 8, and containing not more than 300 ppm of soluble sodium salt, calculated as Na, and not more than 150 ppm of soluble sulfate, calculated as SO.sub.4.
摘要翻译：用于磁记录介质的非磁性底涂层的赤铁矿颗粒包括：平均主轴径不大于0.3μm的高密度针状赤铁矿颗粒，几何标准的主轴径分布不大于1.50 BET比表面积为35m 2 / g以上，pH值为8以上，含有不超过300ppm的可溶性钠盐，以Na计，不超过150ppm的可溶性硫酸盐，以SO4计算。

25. 发明授权

US5604015A Non-magnetic undercoat layer for magnetic recording medium, magnetic recording medium and non-magnetic particles 失效
标题翻译：用于磁记录介质的非磁性底涂层，磁记录介质和非磁性颗粒
公开(公告)号：US5604015A
公开(公告)日：1997-02-18
申请号：US240512
申请日：1994-05-10
申请人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Minoru Ohsugi , Hiroko Morii , Mineko Sakoda , Norio Sugita , Masaaki Maekawa
发明人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Minoru Ohsugi , Hiroko Morii , Mineko Sakoda , Norio Sugita , Masaaki Maekawa
IPC分类号： G11B5/733 , G11B5/738 , B32B33/00 , G11B5/66 , G11B5/70
CPC分类号： G11B5/738 , G11B5/733 , Y10S428/90 , Y10T428/24372 , Y10T428/2438 , Y10T428/24388 , Y10T428/265 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995
摘要： The disclosure describes a non-magnetic undercoating layer for a magnetic recording medium, coated on the surface of a non-magnetic substrate comprising:non-magnetic particles selected from the group consisting of particles (1) and (2):(1) coated acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles which are produced by adhering not less than 0.01 to 20 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2, and based on acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material) of an oxide or a hydroxide containing Al, Si or both Al and Si to the surfaces of acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material, and have a molecular weight-dependent parameter .alpha. represented by the following formula of not less than 0.5:As=K.sub.1 .multidot.M.sup..alpha.wherein M represents the number-average molecular weight of a binder resin, As represents the saturation adsorption of said binder resin, and K.sub.1 represents a constant used for measuring As and dependent on the binder resin and a solvent,(2) BaO.4.5Fe.sub.2 O.sub.3 particles having an average particle diameter of not more than 0.1 .mu.m; anda binder resin.
摘要翻译：本发明描述了一种涂覆在非磁性基材表面上的用于磁记录介质的非磁性底涂层，包括：选自颗粒（1）和（2）的非磁性颗粒：（1）涂覆通过粘附不小于0.01至20重量％（以Al，SiO 2或Al和SiO 2计算，并以针状或纺锤形α-Fe2O3颗粒为核心材料）制备的针状或纺锤状α-Fe2O3颗粒，含有Al，Si或Al和Si的氧化物或氢氧化物作为核心材料的针状或纺锤形α-Fe2O3颗粒的表面，并且具有不低于下列公式的分子量依赖参数α 比0.5：As =K1xMα其中M表示粘合剂树脂的数均分子量，As表示所述粘合剂树脂的饱和吸附，K1表示用于测量As的常数，并且取决于粘合剂树脂和溶剂，（ 2）平均粒径不大于0.1μm的BaO.4.5Fe2O3颗粒; 和粘合剂树脂。

26. 发明授权

US6087004A Non-magnetic black particles, non-magnetic black pigment therefrom and non-magnetic black filler therefrom 失效
标题翻译：非磁性黑色颗粒，非磁性黑色颜料及其非磁性黑色填料
公开(公告)号：US6087004A
公开(公告)日：2000-07-11
申请号：US912720
申请日：1997-08-18
申请人： Yasuyuki Tanaka , Hiroko Morii , Kazuyuki Hayashi , Hiroshi Sumita
发明人： Yasuyuki Tanaka , Hiroko Morii , Kazuyuki Hayashi , Hiroshi Sumita
IPC分类号： C08K3/30 , C09C1/00 , C09C1/24 , C09D7/12 , G11B5/708 , G11B5/706
CPC分类号： C09D7/1275 , C08K3/30 , C09C1/0081 , C09C1/24 , C09D7/1225 , C09D7/1283 , G11B5/708 , C01P2002/70 , C01P2004/03 , C01P2004/32 , C01P2004/38 , C01P2004/41 , C01P2004/61 , C01P2004/62 , C01P2004/84 , C01P2006/12 , C01P2006/60 , C01P2006/62 , C01P2006/63 , C01P2006/64 , C01P2006/66 , C08K3/0033 , C08K9/02 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/2991
摘要： In accordance with the present invention, there are provided non-magnetic black particles composed primarily of Fe and having a hematite structure, which shows an excellent blackness, heat resistance, and dispersibility in a vehicle, and which particles contain manganese in an amount of 5 to 40% by weight based on the weight of the non-magnetic black particles, a soluble sodium salt in an amount of not more than 500 ppm (calculated as Na), and a soluble sulfate in an amount of not more than 200 ppm (calculated as SO.sub.4), and have an average particle size of 0.1 to 10.0 .mu.m and a pH of not less than 5.5.
摘要翻译：根据本发明，提供了主要由Fe组成并具有赤铁矿结构的非磁性黑色颗粒，其在车辆中表现出优异的黑色度，耐热性和分散性，并且该颗粒含有5个量的锰至40重量％，以不大于500ppm（以Na计算）的量的可溶性钠盐和不大于200ppm的可溶性硫酸盐（以SO4计算），平均粒径为0.1〜10.0μm，pH值不小于5.5。

27. 发明授权

US06420030B1 Black iron-based composite particles, process for producing the same, paint and rubber or resin composition containing the same 有权
标题翻译：黑色铁基复合颗粒，其制造方法，涂料和橡胶或含有它们的树脂组合物
公开(公告)号：US06420030B1
公开(公告)日：2002-07-16
申请号：US09521676
申请日：2000-03-08
申请人： Kazuyuki Hayashi , Yasuyuki Tanaka , Hiroko Morii
发明人： Kazuyuki Hayashi , Yasuyuki Tanaka , Hiroko Morii
IPC分类号： B32B516
CPC分类号： B82Y30/00 , C01P2004/03 , C01P2004/04 , C01P2004/10 , C01P2004/20 , C01P2004/30 , C01P2004/32 , C01P2004/41 , C01P2004/50 , C01P2004/51 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2004/64 , C01P2004/80 , C01P2004/82 , C01P2004/86 , C01P2006/12 , C01P2006/60 , C01P2006/62 , C01P2006/80 , C08K3/22 , C08K9/06 , C08K9/08 , C09C1/0081 , C09C1/24 , C09C3/12 , C09D7/62 , C09D7/67 , C09D7/68 , Y10T428/2998
摘要： Black iron-based composite particles of the present invention comprise: as a core particle black iron oxide particle or black iron oxide hydroxide particle having an average particle size of 0.08 to 1.0 &mgr;m; a coating layer formed on the surface of the black iron oxide particle or black iron oxide hydroxide particle, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtained from alkoxysilane compounds, (2) polysiloxanes, or modified polysiloxanes and (3) fluoroalkyl organosilane compounds obtained from fluoroalkylsilane compounds; and carbon black coat formed on said coating comprising said organosilicon compound, in an amount of 1 to 30 parts by weight based on 100 parts by weight of said black iron oxide particles or black iron oxide hydroxide particles. Such black iron-based composite particles have an excellent dispersibility in a vehicle, or a rubber or resin composition on the basis of a small amount of the carbon black which are desorbed from the surface of the black iron-based composite particles, and a high blackness substantially identical to a blackness of carbon black fine particles used solely, even when carbon black is contained therein only in a small amount.
摘要翻译：本发明的黑色铁系复合粒子包含平均粒径为0.08〜1.0μm的芯粒黑色氧化铁粒子或黑色铁氧化物氢氧化物粒子，形成在黑色氧化铁粒子的表面上的被覆层或黑铁氧化物氢氧化物颗粒，其包含至少一种选自以下的有机硅化合物：（1）由烷氧基硅烷化合物获得的有机硅烷化合物，（2）聚硅氧烷或改性聚硅氧烷，和（3）由氟烷基硅烷化合物得到的氟代烷基有机硅烷化合物; 并且在所述包含所述有机硅化合物的涂层上形成的炭黑涂层，其量为基于100重量份的所述黑色氧化铁颗粒或黑色铁氧化物氢氧化物颗粒为1至30重量份。这种黑色铁基复合颗粒在车辆中具有优异的分散性，或者基于从黑色铁基复合颗粒的表面解吸的少量炭黑，橡胶或树脂组合物，以及高黑色度与单独使用的炭黑细颗粒的黑度基本相同，即使仅含有少量的炭黑也是如此。

28. 发明授权

US06251555B1 Black magnetic composite particles for black magnetic toner and black magnetic toner using the same 失效
标题翻译：用于黑色磁性调色剂的黑色磁性复合颗粒和使用其的黑色磁性调色剂
公开(公告)号：US06251555B1
公开(公告)日：2001-06-26
申请号：US09291198
申请日：1999-04-14
申请人： Kazuyuki Hayashi , Seiji Ishitani , Yasuyuki Tanaka , Hiroko Morii
发明人： Kazuyuki Hayashi , Seiji Ishitani , Yasuyuki Tanaka , Hiroko Morii
IPC分类号： G90
CPC分类号： G03G9/0839 , G03G9/0833 , Y10T428/2991 , Y10T428/2995
摘要： Black magnetic composite particles for black magnetic toner according to the present invention comprise: magnetite particle as core particle; fine particles which are adhered or exist on at least a part of the surface of each magnetite particle, and comprise oxides, oxide hydroxides or oxides and oxide hydroxides composed of at least one element selected from the group consisting of Si, Zr, Ti, Al and Ce; and a methyl hydrogen polysiloxane coating layer formed on said fine particles or said fine particles and the exposed surface of the magnetite particle, the average particle size of said black magnetic composite particles being 0.08 to 1.0 &mgr;m. Such black magnetic composite particles are suitable for a black magnetic toner which can exhibit not only an excellent flowability but also a high volume resistivity.
摘要翻译：根据本发明的用于黑色磁性调色剂的黑色磁性复合颗粒包括：作为核心颗粒的磁铁矿颗粒;附着或存在于每个磁铁矿颗粒表面的至少一部分上的细颗粒，并且包含氧化物，氧化物氢氧化物或氧化物，以及由选自Si，Zr，Ti，Al和Ce中的至少一种元素组成的氧化物氢氧化物; 和在所述细颗粒或所述细颗粒和磁铁矿颗粒的暴露表面上形成的甲基氢聚硅氧烷涂层，所述黑色磁性复合颗粒的平均粒度为0.08至1.0μm。这种黑色磁性复合颗粒适合于黑色不仅具有优异的流动性，而且还具有高体积电阻率的磁性调色剂。

29. 发明授权

US6117540A Non-magnetic black particles, non-magnetic black pigment therefrom and non-magnetic black filler therefrom 失效
标题翻译：非磁性黑色颗粒，非磁性黑色颜料及其非磁性黑色填料
公开(公告)号：US6117540A
公开(公告)日：2000-09-12
申请号：US477707
申请日：2000-01-05
申请人： Yasuyuki Tanaka , Hiroko Morii , Kazuyuki Hayashi , Hiroshi Sumita
发明人： Yasuyuki Tanaka , Hiroko Morii , Kazuyuki Hayashi , Hiroshi Sumita
IPC分类号： C08K3/30 , C09C1/00 , C09C1/24 , C09D7/12 , G11B5/708
CPC分类号： C09D7/1275 , C08K3/30 , C09C1/0081 , C09C1/24 , C09D7/1225 , C09D7/1283 , G11B5/708 , C01P2002/70 , C01P2004/03 , C01P2004/32 , C01P2004/38 , C01P2004/41 , C01P2004/61 , C01P2004/62 , C01P2004/84 , C01P2006/12 , C01P2006/60 , C01P2006/62 , C01P2006/63 , C01P2006/64 , C01P2006/66 , C08K3/0033 , C08K9/02 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/2991
摘要： In accordance with the present invention, there are provided non-magnetic black particles composed primarily of Fe and having a hematite structure, which shows an excellent blackness, heat resistance, and dispersibility in a vehicle, and which particles contain manganese in an amount of 5 to 40% by weight based on the weight of the non-magnetic black particles, a soluble sodium salt in an amount of not more than 500 ppm (calculated as Na), and a soluble sulfate in an amount of not more than 200 ppm (calculated as SO.sub.4), and have an average particle size of 0.1 to 10.0 .mu.m and a pH of not less than 5.
摘要翻译：根据本发明，提供了主要由Fe组成并具有赤铁矿结构的非磁性黑色颗粒，其在车辆中表现出优异的黑色度，耐热性和分散性，并且该颗粒含有5个量的锰至40重量％，以不大于500ppm（以Na计算）的量的可溶性钠盐和不大于200ppm的可溶性硫酸盐（以SO4计算），平均粒径为0.1〜10.0μm，pH值不小于5。

30. 发明授权

US06638675B2 Black magnetic toner 失效
标题翻译：黑色磁性墨粉
公开(公告)号：US06638675B2
公开(公告)日：2003-10-28
申请号：US10141959
申请日：2002-05-10
申请人： Kazuyuki Hayashi , Hiroko Morii , Yasuyuki Tanaka , Seiji Ishitani
发明人： Kazuyuki Hayashi , Hiroko Morii , Yasuyuki Tanaka , Seiji Ishitani
IPC分类号： G03G9083
CPC分类号： G03G9/083 , G03G9/0833 , G03G9/0836 , G03G9/0839 , G03G9/08773 , G03G9/0902 , G03G9/0904 , Y10S428/90 , Y10T428/2991 , Y10T428/2995 , Y10T428/2998
摘要： Black magnetic toner comprising: a binder resin, and black magnetic composite particles comprising: magnetic iron oxide particles having an average particle diameter of 0.055 to 0.95 &mgr;m; a coating layer formed on the surface of said magnetic iron oxide particles, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtainable from alkoxysilane compounds, (2) polysiloxanes or modified polysiloxanes, and (3) fluoroalkyl organosilane compounds obtainable from fluoroalkylsilane compounds; and a carbon black coat formed on said coating layer comprising said organosilicon compound, in an amount of 1 to 25 parts by weight based on 100 parts by weight of said magnetic iron oxide particles. Such a black magnetic toner can be free from being deteriorated in electric resistance due to the existence of the carbon black coat, and as a result, is suitable as a high-resistance or insulated magnetic toner.
摘要翻译：黑色磁性调色剂，其包含：粘合剂树脂和黑色磁性复合颗粒，其包含平均粒径为0.055至0.95μm的磁性氧化铁颗粒;形成在所述磁性氧化铁颗粒的表面上的涂层，其包含至少一种有机硅化合物选自：（1）可从烷氧基硅烷化合物获得的有机硅烷化合物，（2）聚硅氧烷或改性聚硅氧烷，和（3）可从氟代烷基硅烷化合物获得的氟烷基有机硅烷化合物; 和在包含所述有机硅化合物的所述涂层上形成的炭黑涂层，其量为基于100重量份的所述磁性氧化铁颗粒为1至25重量份。这样的黑色磁性调色剂可以没有劣化的电由于存在炭黑涂层而导致的电阻，因此适合作为高电阻或绝缘磁性调色剂。

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