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    • 4. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US06468628B2
    • 2002-10-22
    • US09759332
    • 2001-01-16
    • Masanori SueokaAkimitsu TsukudaNobuaki Ito
    • Masanori SueokaAkimitsu TsukudaNobuaki Ito
    • G11B5733
    • G11B5/7315G11B5/64G11B5/70G11B5/7325G11B5/733G11B5/735Y10T428/24355Y10T428/24975Y10T428/31725
    • Disclosed is a magnetic recording medium having a magnetic layer directly formed on at least one surface of a base film that comprises, as the essential ingredient, an aromatic polyamide, in which the number of protrusions having a height of at least 10 nm on the surface of the magnetic layer, Na(10) (/mm2), the number of protrusions having a height of at least 50 nm thereon, Na(50) (/mm2), and the number of protrusions having a height of at least 10 nm on the surface of the base film coated with the magnetic layer, Na(10)′ (/mm2), all satisfy the following formulae: 2×104≦Na(10)≦2×107, 0≦Na(50)≦5×104, −0.9≦(Na(10)−Na(10)′)/Na(10)′≦0. The medium has, as the non-magnetic substrate (base film), a highly-tough, aromatic polyamide film, and the surface profile of its magnetic layer and that of its base film are specifically controlled.
    • 公开了一种磁记录介质,其具有直接形成在基膜的至少一个表面上的磁性层,所述磁性层包含作为必要成分的芳族聚酰胺,其中表面上具有至少10nm的高度的突起的数量 的磁性层的Na(10)(/ mm 2),其上具有至少50nm的高度的突起的数量为Na(50)(/ mm 2),并且具有至少10nm的高度的突起的数量 在涂覆有磁性层的基膜的表面上,Na(10)'(/ mm2)都满足下列公式:介质作为非磁性基材(基膜)具有高韧性,芳香性 聚酰胺薄膜及其磁性层的表面轮廓及其底膜的表面轮廓是特别受控制的。
    • 6. 发明申请
    • Retardation film and polyester resin for optical use
    • 用于光学用途的延迟膜和聚酯树脂
    • US20090207490A1
    • 2009-08-20
    • US11920777
    • 2006-05-23
    • Hideki MoriyamaShigetoshi MaekawaJun SakamotoAkimitsu TsukudaMasahiro KimuraRisa Taniguchi
    • Hideki MoriyamaShigetoshi MaekawaJun SakamotoAkimitsu TsukudaMasahiro KimuraRisa Taniguchi
    • G02B1/08G02B5/30C08K5/5317
    • C08J5/18C08G63/199C08G63/553C08G63/672C08J2367/00G02B5/3025
    • The present invention relates to a retardation film using polyester having a photoelastic coefficient of −40×10−12 Pa−1 to 40×10−12 Pa−1. The present invention also relates to a polyester resin for optical use which contains a phosphorus compound, and an alicyclic component and a fluorene derivative component as constituents, and satisfies the following equations (6) and (7): 100° C.≦glass transition temperature≦150° C.  (6) and 1.0≦(Ma/2+Mb+Mc)/P≦5.0  (7), wherein Ma is the number of moles of an alkali metal element contained in 1 ton of the polyester resin, Mb is the number of moles of an alkaline earth metal element contained in 1 ton of the polyester resin, Mc is the sum of the number of moles of a zinc element (Zn), a cobalt element (Co) and a manganese element (Mn) contained in 1 ton of the polyester resin, and P is the number of moles of a phosphorus element contained in 1 ton of the polyester resin.
    • 本发明涉及使用光弹性系数为-40×10-12Pa-1〜40×10-12Pa-1的聚酯的延迟膜。 本发明还涉及含有磷化合物,脂环族成分和芴衍生物成分作为成分的光学用聚酯树脂,并且满足下列等式(6)和(7):<?在线式 描述=“在线公式”end =“lead”?> 100°C <=玻璃化转变温度<= 150°C(6)<?in-line-formula description =“In-line Formulas”end = “tail”?> <?in-line-formula description =“In-line Formulas”end =“lead”?>和<?in-line-formula description =“In-line Formulas”end =“tail”?> <?in-line-formula description =“In-line Formulas”end =“lead”?> 1.0 <=(Ma / 2 + Mb + Mc)/ P <= 5.0(7) description =“In-line Formulas”end =“tail”?>其中Ma是1吨聚酯树脂中含有的碱金属元素的摩尔数,Mb是包含在碱性金属元素中的碱金属元素的摩尔数 1吨聚酯树脂,Mc是锌元素(Zn),钴元素(Co)和人的摩尔数之和 1吨聚酯树脂中含有的甘油元素(Mn),P是1吨聚酯树脂中含有的磷元素的摩尔数。