B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 69/10 (2006.01) B01D 39/16 (2006.01) B01D 67/00 (2006.01) B01D 69/02 (2006.01) B01D 71/68 (2006.01) G01N 1/18 (2006.01)
Patent
CA 2274783
The present invention relates to the field of synthetic polymeric microfiltration membrane materials that are fabricated to separate liquids from solids contained therein. One aspect of the invention relates to a highly asymmetric, hydrophilic microfiltration membrane with high surface porosity. The membrane is rendered hydrophilic through co- casting the sulfone polymer with a hydrophilic polymer, such as polyvinylpyrrolidone. The membranes of the invention are highly useful in testing devices for the quick detection of properties or components contained in liquid samples, such as diagnostic applications, as well as for other filtration applications that demand relatively large pore sizes, thick membranes, high asymmetry, and/or high lateral wicking speeds.
La présente invention concerne le domaine des matières de membranes de microfiltration synthétiques polymères fabriquées pour séparer des solides contenus dans des liquides. Un aspect de l'invention concerne une membrane de microfiltration hautement asymétique hydrophile présentant une grande porosité de surface. La membrane est rendue hydrophile par co-coulée du polymère sulfoné avec un polymère hydrophile, tel que la polyvinylpyrrolidone. Les membranes de l'invention sont hautement utiles dans des dispositifs d'essai permettant de détecter rapidement les propriétés ou les constituants d'échantillons de liquide tels que dans des applications diagnostiques, et également pour d'autres applications de filtration requérant des tailles de pores relativement grandes, des membranes épaisses, une asymétrie élevée et/ou un effet de mèche latéral à vitesses élevées.
Morris Richard A.
Wang I-Fan
Zepf Robert
Bull Housser & Tupper Llp
Memtec America Corporation
Pall Corporation
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