Vinylidene fluoride based resin porous hollow yarn and method for production thereof
    1.
    发明申请
    Vinylidene fluoride based resin porous hollow yarn and method for production thereof 有权
    偏二氟乙烯系树脂多孔中空丝及其制造方法

    公开(公告)号:US20070039872A1

    公开(公告)日:2007-02-22

    申请号:US10574111

    申请日:2004-09-24

    IPC分类号: B01D69/00

    摘要: There is provided a porous hollow fiber of vinylidene fluoride resin which has a water permeation rate that is large per fiber and little dependent on the length, has a large treatment capacity per volume of a filtering module, and is therefore suitable as a microfilter element. That is, a porous hollow fiber, comprising a vinylidene fluoride resin having a weight-average molecular weight of at least 3×105, having a water permeation rate F (m3/m2·day) measured at a pressure difference of 100 kPa and at a water temperature of 25° C. in a range of test length L=0.2-0.8(m) and expressed in a linear relationship with the test length L of: F=C·L+F0 (formula 1) and satisfying requirements (a)-(d) shown below: (a) a average slope C (/day) of: −20≦C≦0, (b) an intercept (basic permeability) F0 (m3/m2·day) of: F0≧30, (c) a relation between F0 (m3/m2·day) and an average pore diameter P (μm) according to half-dry method of F0/P≧300, and (d) an outer diameter of at most 3 mm.

    摘要翻译: 提供了一种偏氟乙烯树脂的多孔中空纤维,其具有每个纤维的水渗透速率大,并且几乎不依赖于长度,每个体积的过滤组件具有大的处理能力,因此适合作为微过滤器元件。 也就是说,一种多孔中空纤维,其包含重均分子量为至少3×10 5的偏二氟乙烯树脂,其具有水渗透速率F(m 3 / 在测试长度L = 0.2-0.8(m)的范围内,在100kPa的压力差和25℃的水温下测量,并以线性关系表示, 测试长度L为:F = C.L + F 0(式1),满足以下所示的要求(a) - (d):(a)平均斜率C(/天) 的范围:-20 <= C <= 0,(b)截距(基本磁导率)F 0(m 3)/ m 2。 天)为:F <0 = 30,(c)F 0 3 / m 2之间的关系, SUP> .day),根据F0.00 / P> 300的半干法的平均孔径P(母体),(d)外径至多3mm。