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    • 4. 发明申请
    • HOLLOW FIBER MEMBRANE, METHOD FOR MANUFACTURING THE SAME, AND BLOOD PURIFICATION MODULE
    • 中空纤维膜,其制造方法和血液净化模块
    • US20110290709A1
    • 2011-12-01
    • US13147721
    • 2010-02-02
    • Makoto OhnoIsamu YamamotoTakahito SagaraKimihiro MabuchiTohru UenishiShinya Koyama
    • Makoto OhnoIsamu YamamotoTakahito SagaraKimihiro MabuchiTohru UenishiShinya Koyama
    • B01D71/68B01D69/08D01D5/06B01D63/02
    • B01D69/087A61M1/1621B01D63/02B01D71/68B01D2313/04
    • The present invention provides a hollow fiber membrane where the membrane strength and pressure resistance to pressurization from the dialysate side is ensured, the retaining rate of water permeability after the repeated pressure load from outside is high, the resistance to the pressure from outside is excellent and the assembling property into module (low leakage rate at the adhered part) is satisfactory at the same time. The present invention also provides a method for manufacturing the same, and a blood purification module.An annealing spinning method was found where a spinning dope is discharged from a nozzle into a coagulation bath, an appropriate elongation is applied so as to enhance the membrane strength, an elongation is continued during a water-washing step so as not to relax the elongation, and no elongation is applied during drying whereby the strain is relaxed. By the annealing spinning, a hollow fiber membrane and a blood purification module can be obtained where although the water permeability is low, the efficiency is high, no risk of backfiltration is resulted, the pressure resistance and strength are enhanced due to elongation, the stability is enhanced due to annealing during drying, the safety and assembling property into module are excellent.
    • 本发明提供了一种中空纤维膜,其中确保了来自透析液一侧的膜强度和耐压性,在来自外部的反复压力负载之后的透水性保持率高,对外部的压力的耐受性优异, 模块的组装性(粘附部分的低泄漏率)同时是令人满意的。 本发明还提供了其制造方法和血液净化模块。 发现退火纺丝法,其中纺丝原液从喷嘴排出到凝固浴中,施加适当的伸长率以提高膜强度,在水洗步骤期间持续延伸以便不使伸长率松弛 ,并且在干燥期间不施加伸长率,从而使应变松弛。 通过退火纺丝,可以获得中空纤维膜和血液净化组件,其中透水性低,效率高,不会产生反渗透的风险,耐压性和强度由于伸长而提高,稳定性 由于干燥过程中的退火而增强,模块的安全性和组装性优异。