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US 12,409,420 B2Granted
Polymeric membrane and methods for the production of same
AssigneeFresenius Medical Care Holdings, Inc.
InventorsBrodie Schwinn, Jiunn Teo
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Abstract
The present invention relates to a method to make polymeric membranes that are preferably useful in dialysis, wherein the method conducts at least one membrane-forming step and/or post-forming processing step with the use of sonication. Polymeric membrane, such as polymeric hollow fiber membrane, having improved one or properties are further described.
Claims21
A method of making a polymeric membrane, said method comprising:
- a) providing a solution comprising at least one polymer and at least one solvent;
- b) forming the polymeric membrane by either passing said solution through a spinning block to form a polymeric hollow fiber membrane, wherein said forming occurs in said spinning block, or casting said solution on a surface to form a polymeric sheet membrane;
- c) passing said polymeric membrane from step (b) through at least one precipitation bath comprising an aqueous solution;
- d) passing said polymeric membrane from step (c) through at least one washing bath comprising a further aqueous solution;
- e) passing said polymeric membrane from step (d) through at least one drying chamber;
- and
- f) collecting said polymeric membrane from step (e), wherein
- sonication of said solution occurs in said spinning block prior to polymeric membrane formation and/or sonication of said polymeric membrane occurs in said drying chamber.
5 more elements
Dependencies are inferred from the claim text.