Spinneret, device having a spinneret, method for producing a hollow fiber or hollow fiber membrane by means of a spinneret and filter
A spinning and nozzle technology, applied in the field of spinning nozzles, can solve the problems of not being able to provide spinning quality uniformly, not being able to obtain performance, etc.
Active Publication Date: 2019-12-27
FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
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Problems solved by technology
[0019] Although various spinning nozzles are known from the prior art, for example from WO 89 / 02938 A1 or CN 104775171 A, which are especially designed for as uniform a feeding of the spinning mass as possible, in the case of single-layer wall thicknesses of less than 100 nm In the case of ultrafine hollow fiber capillary membranes, good performance cannot usually be obtained because the spinning mass cannot be provided with sufficient uniformity
Method used
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[0153] figure 1 Shows a schematic cross-sectional view of the structure of a first exemplary embodiment of a spinning nozzle 10 according to the invention, which consists of a microstructured cover plate 15 and an underlying structure structured by means of microstructuring techniques. The four plates 17, 18, 19 and 20 are formed, each plate is made of a silicon wafer. In another configuration of the spinning nozzle according to the invention, a base plate can be arranged below the plate 20 . An additional support plate can also be arranged above the cover plate 15 .
[0154] Here, the spinning nozzle 10 of the present invention is designed to extrude hollow fiber capillary membranes from three spin-mass layers in a wet-to-wet spinning process, wherein the spinning nozzle comprises a total of four relative spinning nozzles The functional state of use of 10 is arranged at the inlet ports 11, 12, 13 and 14 on the upper side of the spinning nozzle 10 (see Figure 4 ).
[0155...
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Abstract
The invention relates to a spinneret (10) for extruding a hollow fiber from one or more spinning dopes, to a device having a spinneret (10), and to a method for extruding a hollow fiber by means of aspinneret (10), the spinneret (10) having, for each spinning dope to be extruded, an inlet opening (12, 13, 14) for introducing the spinning dope into the spinneret (14), an outlet opening for the discharge of the spinning dopes along an outlet axis (A), and at least one spinning-dope flow channel for conducting at least one spinning dope to be extruded from the inlet opening (12, 13, 14) to the outlet opening, at least one spinning-dope flow channel having a flow-influencing section having an inlet and having an outlet, which flow-influencing section has a flow-guiding structure (18, 19, 20)in order to influence a spinning dope flowing through the spinning-dope flow channel, the flow-guiding structure (18, 19, 20) being designed to influence the spinning-dope flow in such a way that thespinning dope flowing through the spinning-dope flow channel flows through spinning-dope flow channel at least partly along at least two different flow paths, the flow paths extending through the spinning-dope flow channel having a substantially equal path length between the inlet of the flow-influencing section and the outlet opening of the spinning-dope flow channel.
Description
technical field [0001] The present invention relates to a spinning nozzle for extruding hollow fibers from one or more spin-mass bodies, in particular for extruding hollow-fiber membranes from one or more spin-mass bodies, wherein the The spinning nozzle has: an inlet port for each spinning mass body to be extruded, for introducing the spinning mass body into the spinning nozzle; at least one outlet port, for making one or two The above spin-mass exits from the spinning nozzle along the outlet axis; and at least one spin-mass flow channel for directing at least one spin-mass to be extruded from a corresponding inlet port to a corresponding outlet ports, wherein at least one of the spin-mass flow channels comprises a flow manipulation section having an inlet and an outlet, wherein the flow manipulation section has a flow directing structure for At least one spin-mass flow channel that influences the flow through the spin-mass between them, wherein the flow-guiding structure of...
Claims
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IPC IPC(8): D01D4/06B01D69/08D01D5/24
CPCA61M1/14B01D61/243B01D69/02B01D69/085B01D2323/42B01D2325/04D01D4/06D01D5/24B01D69/088
Inventor T·凯勒J·H·施塔尔E·佐默
Owner FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH