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    • 3. 发明申请
    • Magnetic disk cartridge
    • 磁盘盒
    • US20060098342A1
    • 2006-05-11
    • US11221731
    • 2005-09-09
    • Ayako MatsumotoShinji SaitoHitoshi Noguchi
    • Ayako MatsumotoShinji SaitoHitoshi Noguchi
    • G11B23/03
    • G11B23/0321G11B23/0308G11B23/0316
    • A magnetic disk cartridge, which holds therein a magnetic disk with recording density and has a liner composed of polyethylene terephthalate fibers, is provided which achieves a good dust-removal effect by the liner without flawing the magnetic disk and without increasing the rotary torque of the magnetic disk. A magnetic layer of the magnetic disk is formed such that the magnetic layer contains diamond particles which have an average particle size satisfying a relationship “b−0.05≦a≦b+0.1” at 1% to 10% by weight with respect to the ferromagnetic material, where “a” represents the average particle size of the diamond particles in units of μm and “b” represents a thickness of the magnetic layer in units of μm. The fibers of the liner are selected from the fibers whose fiber diameter varies in its length direction.
    • 一种磁盘盒,其具有记录密度的磁盘并具有由聚对苯二甲酸乙二醇酯纤维组成的衬垫,其实现了衬垫的良好的除尘效果,而不会使磁盘发生瑕疵而不会增加旋转扭矩 磁盘。 形成磁盘的磁性层,使得磁性层含有平均粒径满足关系式“b-0.05 <= a <= b + 0.1”的金刚石颗粒,相对于 铁磁材料,其中“a”表示以单位为单位的金刚石颗粒的平均粒度,“b”表示磁性层以母体为单位的厚度。 衬垫的纤维选自其纤维直径在其长度方向上变化的纤维。
    • 6. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US06780503B2
    • 2004-08-24
    • US10281947
    • 2002-10-29
    • Hitoshi NoguchiNobuo YamazakiShinji Saito
    • Hitoshi NoguchiNobuo YamazakiShinji Saito
    • G11B5702
    • G11B5/7021G11B5/7023G11B5/70678G11B5/7085G11B5/714Y10T428/256Y10T428/31609
    • A magnetic recording medium comprising: a nonmagnetic support; and at least one magnetic layer comprising a ferromagnetic hexagonal ferrite powder and a binder, wherein the magnetic layer comprises diamond particles having an average particle size of 0.03 to 0.5 &mgr;m in a ratio of 0.1 to 5% by weight to the ferromagnetic hexagonal ferrite powder, the ferrite hexagonal ferrite powder has an average tabular diameter of 5 to 40 nm, and the binder is at least one of: (i) a binder comprising from 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM, wherein M represents a hydrogen atom, an alkali metal or ammonium, and (ii) a binder comprising from 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group.
    • 一种磁记录介质,包括:非磁性载体; 以及包含铁磁性六角铁氧体粉末和粘合剂的至少一个磁性层,其中所述磁性层包含平均粒度为0.03-0.5μm,相对于铁磁性六角铁氧体粉末为0.1-5wt%的金刚石颗粒, 所述铁氧体六角铁氧体粉末的平均片状直径为5〜40nm,所述粘合剂为以下中的至少一种:(i)包含0.2〜0.7meq / g的至少一种选自-SO 3 M, OSO3M,-PO(OM)2,-OPO(OM)2和-COOM,其中M表示氢原子,碱金属或铵,和(ii)包含0.5-5meq / g至少一种 选自-CONR1R2,-NR1R2和-N + R1R2R3的极性基团,其中R1,R2和R3各自独立地表示氢原子或烷基。
    • 7. 发明授权
    • Method for producing magnetic recording medium and magnetic recording medium
    • 磁记录介质和磁记录介质的制造方法
    • US06677036B2
    • 2004-01-13
    • US10281996
    • 2002-10-29
    • Hitoshi NoguchiNobuo YamazakiShinji Saito
    • Hitoshi NoguchiNobuo YamazakiShinji Saito
    • B05D512
    • G11B5/70678G11B5/7021G11B5/7023Y10S428/90
    • A method for producing a magnetic recording medium comprising: dispersing at least a binder and a ferromagnetic hexagonal ferrite powder to prepare a magnetic coating; and applying the magnetic coating to provide at least one magnetic layer, wherein the binder is at least one of: (a) a binder comprising 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM wherein M represents a hydrogen atom, an alkali metal or ammonium; and (b) a binder comprising 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group, and the ferromagnetic hexagonal ferrite powder has an average tabular diameter of from 10 to 40 nm and a water content of from 0.3 to 3% by weight.
    • 一种制造磁记录介质的方法,包括:分散至少一种粘结剂和一种铁磁性六角铁氧体粉末以制备磁性涂层; 以及施加所述磁性涂层以提供至少一个磁性层,其中所述粘合剂是以下至少一种:(a)包含0.2至0.7meq / g的至少一种选自-SO 3 M,-OSO 3 M,-PO (OM)2,-OPO(OM)2和-COOM,其中M表示氢原子,碱金属或铵; 和(b)包含0.5-5meq / g至少一种选自-CONR1R2,-NR1R2和-N + R1R2R3的极性基团的粘合剂,其中R1,R2和R3各自独立地表示氢原子或烷基, 铁磁六方铁氧体粉末的平均片状直径为10〜40nm,水含量为0.3〜3重量%。