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    • 5. 发明公开
    • Polysulfone porous hollow fiber
    • PoröseHohlfaser aus聚砜。
    • EP0543355A2
    • 1993-05-26
    • EP92119650.7
    • 1992-11-19
    • KANEGAFUCHI KAGAKU KOGYO KABUSHIKI KAISHA
    • Eguchi, Tamiyuki
    • D01D5/24D01D5/247D01F6/76
    • D01F6/76B01D67/0011B01D69/02B01D69/08B01D69/085B01D71/68B01D2323/08B01D2323/12B01D2325/20D01D5/247Y10S264/08
    • A porous hollow fiber of polysulfone suitable for use in filtration such as microfiltration and having a prolonged life, the hollow fiber having an inner surface of a network structure such that approximately circular openings having a minor axial length of 0.1 to 10 µm are present in proximity to each other at intervals of not more than the average minor axial length of the openings, thus providing a surface fraction of openings of 50 to 90 %, and/or an outer surface of a structure such that the outer surface region has undergone fibrillation to a high degree to form fibrils oriented in the fiber axial direction at intervals of 0.2 to 3 µm, thus providing a surface fraction of openings of at least 50 %. The hollow fiber is prepared by a process characterized in that a polymer substance having an extremely high molecular weight such as polyethylene glycol and polyvinyl pyrrolidone is added to the spinning solution of polysulfone, thereby improving the spinnability.
    • 一种多孔中空纤维,适用于微滤等过滤并具有延长使用寿命的中空纤维,该中空纤维具有网状结构的内表面,使得具有小于0.1至10μm的小轴向长度的近似圆形开口存在于 以不大于开口的平均次轴向长度的间隔彼此接近,从而提供50至90%的开口的表面分数和/或结构的外表面,使得外表面区域经历原纤维化 高度地形成纤维轴向的原纤维,间隔为0.2〜3μm,从而提供至少50%的开口的表面部分。 中空纤维是通过一种方法制备的,其特征在于将具有极高分子量的聚合物物质如聚乙二醇和聚乙烯吡咯烷酮加入到聚砜的纺丝溶液中,从而提高可纺性。
    • 6. 发明公开
    • Uniform discoid particles and process for preparing the same
    • ScheibenförmigeTeilchen gleicherGrösseund ihr Herstellungsprozess。
    • EP0268866A2
    • 1988-06-01
    • EP87115979.4
    • 1987-10-30
    • KANEGAFUCHI KAGAKU KOGYO KABUSHIKI KAISHA
    • Eguchi, TamiyukiTsunomori, Michito
    • B01J2/06B01J2/08B01J2/26C08J3/12B01J20/28
    • B01J2/04Y10T428/2982
    • Uniform discoid particles made of at least one member selected from the group consisting of a natural high molecular substance, a synthetic high molecular substance and an inorganic compound, wherein each particle has a diameter of 20 to 2,000 µm and a thickness/diameter ratio of 1/2 to 1/50, and not less than 80 % of the whole particles have a diameter within the range of 0.5 to 2 times the number average diameter, and a process for preparing the particles. The discoid particle of the present invention has a larger surface area and therefore has a high efficiency when employed in various uses such as a parent material for an ion exchange resin, a packing material for a chromatography, a catalyst and an culture medium for cell culture in comparison with conventional spherical particle.
    • 由选自天然高分子物质,合成高分子物质和无机化合物的至少一种成分构成的均匀的盘状粒子,其中,各粒子的直径为20〜2000μm,厚度/直径比为 1/2至1/50,并且不小于80%的整个颗粒的直径在数均直径的0.5至2倍的范围内,以及制备颗粒的方法。 本发明的盘状颗粒具有较大的表面积,因此在用于离子交换树脂的母体材料,色谱用包装材料,催化剂和细胞培养用培养基等各种用途中具有高效率 与传统的球形颗粒相比。