会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Ethylene-vinyl alcohol copolymer hollow fiber membranes and method of
producing same
    • 乙烯 - 乙烯醇共聚物中空纤维膜及其制备方法
    • US4317729A
    • 1982-03-02
    • US142227
    • 1980-04-21
    • Shuzo YamashitaTaku TanakaHirokuni TaniiAkira KubotsuSyuji Kawai
    • Shuzo YamashitaTaku TanakaHirokuni TaniiAkira KubotsuSyuji Kawai
    • D01F6/04B01D69/08B01D71/38D01D5/24D01F6/30D01F6/34B29D27/04D02G3/00
    • D01F6/30B01D69/08B01D71/38D01D5/24D01F6/34Y10T428/2935Y10T428/2975
    • A hollow fiber membrane made of an ethylene-vinyl alcohol copolymer is provided, which is characterized in that, when observed in a dry state with an electron microscope, the hollow fiber membrane has at least one dense, active layer (or skin layer) on the inside and/or outside surface thereof and further a three-layered structure comprising two layers respectively contacting the inside and outside surfaces and each consisting of a plurality of particles bonded together and having particle sizes of 0.01 to 2 microns and a substantially particle-free homogeneous layer lying between the two layers.A method of producing such hollow fiber membranes is also provided comprising spinning a spinning solution prepared by dissolving an ethylene-vinyl alcohol copolymer in a solvent mainly consisting of dimethyl sulfoxide, dimethylacetamide, pyrrolidone, N-methylpyrrolidone or a mixture of these through a spinneret for hollow fiber production while simultaneously introducing a coagulating liquid through the central aperture of said spinneret, passing the spun fiber through a gaseous atmosphere such that the fiber is drawn to 3 to 30 times its extrusion rate, and coagulating the fiber in a coagulation bath at a temperature within the range specified below:When 15.ltoreq.C.ltoreq.40, -15.ltoreq.T.ltoreq.1/4C+10where C is polymer concentration (weight %) and T is coagulation temperature (.degree.C.).
    • 提供一种由乙烯 - 乙烯醇共聚物制成的中空纤维膜,其特征在于,当用电子显微镜在干燥状态下观察时,中空纤维膜具有至少一个致密的有源层(或表层) 其内部和/或外部表面,并且还包括三层结构,其包括分别接触内表面和外表面的两层,并且各自由粘合在一起并具有0.01至2微米的颗粒尺寸和基本上无颗粒的多个颗粒组成 均匀层位于两层之间。 还提供了制造这种中空纤维膜的方法,包括将通过将乙烯 - 乙烯醇共聚物溶解在主要由二甲基亚砜,二甲基乙酰胺,吡咯烷酮,N-甲基吡咯烷酮或它们的混合物的溶剂中制备的纺丝溶液通过喷丝头纺丝, 中空纤维生产,同时通过所述喷丝头的中心孔引入凝固液,使纺丝纤维通过气态气氛,使得纤维被拉伸至其挤出速率的3至30倍,并将纤维在凝固浴中凝固 温度在下面规定的范围内:当15℃/ 40℃时,-15℃= 1 / 4C + 10其中C是聚合物浓度(重量%),T是凝固温度(℃) )。
    • 6. 发明授权
    • Method of producing ethylene-vinyl alcohol copolymer hollow fiber
membranes
    • 制备乙烯 - 乙烯醇共聚物中空纤维膜的方法
    • US4362677A
    • 1982-12-07
    • US270503
    • 1981-06-04
    • Shuzo YamashitaTaku TanakaHirokuni TaniiAkira KubotsuSyuji Kawai
    • Shuzo YamashitaTaku TanakaHirokuni TaniiAkira KubotsuSyuji Kawai
    • D01F6/04B01D69/08B01D71/38D01D5/24D01F6/30D01F6/34B29D27/00
    • D01F6/30B01D69/08B01D71/38D01D5/24D01F6/34Y10T428/2935Y10T428/2975
    • A hollow fiber membrane made of an ethylene-vinyl alcohol copolymer is provided, which is characterized in that, when observed in a dry state with an electron microscope, the hollow fiber membrane has at least one dense, active layer (or skin layer) on the inside and/or outside surface thereof and further a three-layered structure comprising two layers respectively contacting the inside and outside surfaces and each consisting of a plurality of particles bonded together and having particle sizes of 0.01 to 2 microns and a substantially particle-free homogeneous layer lying between the two layers.A method of producing such hollow fiber membranes is also provided comprising spinning a spinning solution prepared by dissolving an ethylene-vinyl alcohol copolymer in a solvent mainly consisting of dimethyl sulfoxide, dimethylacetamide, pyrrolidone, N-methylpyrrolidone or a mixture of these through a spinneret for hollow fiber production while simultaneously introducing a coagulating liquid through the central aperture of said spinneret, passing the spun fiber through a gaseous atmosphere such that the fiber is drawn to 3 to 30 times its original length, and coagulating the fiber in a coagulation bath at a temperature within the range specified below:When 15.ltoreq.C.ltoreq.40, -15.ltoreq.T.ltoreq.1/4C+10where C is polymer concentration (weight %) and T is coagulation temperature (.degree.C.).
    • 提供一种由乙烯 - 乙烯醇共聚物制成的中空纤维膜,其特征在于,当用电子显微镜在干燥状态下观察时,中空纤维膜具有至少一个致密的有源层(或表层) 其内部和/或外部表面,并且还包括三层结构,其包括分别接触内表面和外表面的两层,并且各自由粘合在一起并具有0.01至2微米的颗粒尺寸和基本上无颗粒的多个颗粒组成 均匀层位于两层之间。 还提供了制造这种中空纤维膜的方法,包括将通过将乙烯 - 乙烯醇共聚物溶解在主要由二甲基亚砜,二甲基乙酰胺,吡咯烷酮,N-甲基吡咯烷酮或它们的混合物的溶剂中制备的纺丝溶液通过喷丝头纺丝 中空纤维生产,同时通过所述喷丝头的中心孔引入凝固液,使纺丝纤维通过气态气氛,使得纤维被拉伸至其原始长度的3至30倍,并将纤维在凝固浴中凝固 温度在下面规定的范围内:当15℃/ 40℃时,-15℃= 1 / 4C + 10其中C是聚合物浓度(重量%),T是凝固温度(℃) )。
    • 8. 发明授权
    • Ethylene-vinyl alcohol hollow fiber membrane and method for the
production thereof
    • 乙烯 - 乙烯醇中空纤维膜及其制备方法
    • US4385094A
    • 1983-05-24
    • US142228
    • 1980-04-21
    • Taku TanakaShuzo YamashitaHirokuni TaniiAkira KubotsuSyuji Kawai
    • Taku TanakaShuzo YamashitaHirokuni TaniiAkira KubotsuSyuji Kawai
    • B01D69/08B01D71/38D01D5/24D01F6/30D01F6/34B29D27/04
    • B01D69/08B01D71/38D01D5/24D01F6/30D01F6/34Y10T428/2975
    • There is provided a hollow fiber membrane of ethylene-vinyl alcohol copolymer which is produced by a process comprising extruding a spinning solution of an ethylene-vinyl alcohol copolymer in a solvent selected from the group consisting of dimethylsulfoxide, dimethylacetamide, pyrrolidone, N-methylpyrrolidone and mixtures thereof through a hollow fiber spinneret while a liquid coagulant is introduced into a central aperture of said spinneret, passing the spun fiber through a gaseous atmosphere in a manner such that the fiber is drawn 0.5 to 20 times its extrusion rate and then coagulating said fiber in a coagulating bath at a temperature within the range satisfying the following relationship:when 15.ltoreq.C.ltoreq.40, 1/4C+20.ltoreq.T.ltoreq.1/4C+57wherein C denotes the copolymer concentration of the spinning solution (wt. %) and T denotes the coagulation temperature (.degree.C.).The coagulating liquid can be water or a mixture of the same solvent as that of said spinning solution with no less than 20 weight % of water.
    • 提供了一种乙烯 - 乙烯醇共聚物的中空纤维膜,其通过以下方法制备,该方法包括将乙烯 - 乙烯醇共聚物的纺丝溶液在选自二甲基亚砜,二甲基乙酰胺,吡咯烷酮,N-甲基吡咯烷酮和 其混合物通过中空纤维喷丝头,同时将液体凝结剂引入所述​​喷丝头的中心孔中,使纺丝纤维以气态气氛使纤维以0.5至20倍的挤出速率拉伸,然后使纤维凝结 在满足以下关系的范围内的温度下的凝固浴中:当15℃= 40,1 / 4C + 20℃/ 1 / 4C + 57,其中C表示共聚物浓度 纺丝溶液(wt。%)和T表示凝固温度(℃)。 凝结液可以是水或与所述纺丝溶液相同溶剂的混合物,其含量不得少于20重量%。