发明名称 |
Dialyzing membrane with adsorbent layer |
摘要 |
A dialyzing membrane, especially for hemodialysis, formed as a hollow fiber, tubular foil or flat sheet by regeneration of cellulose from a cuprammonium solution, the membrane comprising at least two firmly adhered cellulosic layers including at least one dialyzing layer consisting essentially of a semipermeable regenerated cellulose and at least one adsorbent layer consisting of said regenerated cellulose containing embedded therein fine particles of an adsorbent material in an amount of up to 95% by weight with reference to the dry weight of the adsorbent layer, preferably 1 to 90% and especially 20 to 70% by weight, when the adsorbent layer is part of a hollow fiber structure. The dialyzing membrane of the invention is produced by a method requiring at least two cuprammonium cellulose solutions, one of which is free of adsorbent particles and another of which contains a suspension of adsorbent particles, the different solutions being spun from adjacent spinning slots for immediate layer to layer contact and then introduced over a short air gap into a coagulating or precipitating bath to entrap the adsorbent particles in the spun layer in which the particles were originally suspended. Isopropyl myristate is particularly advantageous as a liquid filler for the axial duct or canal of a hollow membrane.
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申请公布号 |
US4267047(A) |
申请公布日期 |
1981.05.12 |
申请号 |
US19790030705 |
申请日期 |
1979.04.16 |
申请人 |
AKZO N.V. OF ARNHEM/NEDERLAND |
发明人 |
HENNE, WERNER;DUENWEG, GUSTAV;SCHMITZ, WERNER;POHLE, RAIMUND;LAWITZKI, FRIEDRICH |
分类号 |
A61M1/18;A61M1/16;B01D15/00;B01D39/18;B01D69/02;C08J5/18;C08J5/22;C08L1/00;(IPC1-7):B01D39/18 |
主分类号 |
A61M1/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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