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Spinning nozzle

A spinneret, nozzle technology, used in spinneret assemblies, rayon manufacturing, filament/wire forming, etc.

Pending Publication Date: 2022-08-05
GAMBRO LUNDIA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increased spinning capacity requires duplication of these machines, resulting in duplication of investment

Method used

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  • Spinning nozzle
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Examples

Experimental program
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Effect test

Embodiment Construction

[0018] Provides a spinneret that produces two hollow fibers per spinneret (dual spinneret) instead of only one hollow fiber as in the known spinnerets (single spinneret) . Twin spinnerets have the same installation dimensions as single spinnerets and can be used to retrofit existing spinning machines.

[0019] The spinneret of the present disclosure is characterized by having two nozzles, each nozzle having two concentric orifices, an outer annular slot and a central orifice. The outer annular seam of each nozzle is connected to a compartment for the polymer solution in the spinneret, and the central orifice of each nozzle is connected via a capillary to a reservoir for the central fluid.

[0020] The compartment for the polymer solution is connected to a supply port for the polymer solution located in the side wall of the spinneret.

[0021] These capillaries are each connected to a reservoir for the center fluid within the spinneret, which in turn is connected to a feed po...

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PUM

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Abstract

The present disclosure relates to a spinneret for producing a hollow fiber membrane in a phase inversion process.

Description

technical field [0001] The present disclosure relates to a spinneret for producing hollow fiber membranes in a phase inversion process. Background technique [0002] Semi-permeable hollow fiber membranes used in medical devices such as capillary dialyzers and capillary filters are mainly manufactured using a phase inversion process. Typically a nozzle with two concentric orifices, an outer annular slot and a central orifice is used. The polymer solution is extruded into the precipitation bath through the outer annular slit of the nozzle, while the central fluid is extruded through the inner hole of the nozzle. [0003] A spinning train comprises a plurality of spinnerets implemented in a spinning machine for producing a plurality of hollow fiber membranes, which are bundled into fiber strands. Hundreds of spinnerets are arranged within the spinneret, each of which separately supplies the polymer solution and the central fluid. [0004] A spin pack is a specially designed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08D01D4/02D01D5/24D01D5/06
CPCB01D69/085B01D2323/42D01D5/24D01D5/06B29C48/345B29C48/022B29C48/09B29C48/32B29C48/05B01D71/441B01D71/68B29K2081/06B29L2031/755D01F6/76D10B2331/30D10B2331/301
Inventor 莱因霍尔德·巴克E·格罗斯曼马库斯·奥尔农M·勒夫勒H·贝尔阿尔德·沃切纳尔C-P·朔伊尔曼
Owner GAMBRO LUNDIA AB