CZ2012950A3 - Applying means of polymer solution to string spinning electrode - Google Patents

Abstract

The coating means comprises a channel (3) for a string electrode that passes through the polymer solution channel (4). At least two perpendicular pairs of guide elements (1, 2) are arranged in the channel (3) for the string electrode. The gap between the guide elements (1) or (2) of the respective pair is less than the smallest dimension of the string electrode channel (3).

Description

Polymer solution applicator on a string spinning electrode

Field of technology

The present invention relates to a polymer solution coating composition for a string spinning electrode of an apparatus for producing nanofibers by electrostatic spinning of a polymer solution in a high intensity electrostatic field comprising a string electrode channel passing through the polymer solution channel.

State of the art

In current devices for the production of nanofibers by electrostatic spinning of polymers in a high-intensity electrostatic field, spinning electrodes are used, formed by a string stretched between conductors placed on the machine frame in a spinning chamber. The polymer solution is applied to the 15-string applicator, which contains an applicator for each string, in which a supply chamber is formed filled for polymer solution application and connected to the external environment by two applicator holes through which the string and the gap between the strand and the applicator wall pass. the polymer solution escapes through the holes.

The problem is the precise setting of the position of the application holes with respect to the string and the long-term maintenance of the set position. In the case of deflection of the application openings relative to the string, either the string breaks or the application means is cut in the area of the openings, and thus the entire application means is degraded.

The aim of the invention is to reduce the accuracy of the positioning of the applicator relative to the string while maintaining a high-quality application of the polymer to the string and to achieve the highest possible service life of both the applicator and the string.

The essence of the invention

The object of the invention is achieved by an application means, the essence of which consists in that at least two

PS3867EN / pairs of guide elements perpendicular to each other, the gap between the guide elements of the respective pair being smaller than the smallest dimension of the channel for the string electrode. Although the cross-section of the string electrode channel is reduced in place of the guide elements, the string is guided more precisely and since the 5 guide elements are made of abrasion-resistant material, they do not cut and, as a result of more precise string guidance, the string electrode channel does not cut .

In a simpler embodiment, one pair of guide elements perpendicular to each other is accommodated in a holder housed in the applicator body, the gap between the guide elements of the respective pair lying in the polymer solution channel at the passage of the string electrode channel.

Another embodiment comprises two pairs of guide elements perpendicular to each other located at both ends of the applicator and extending into the channel for the string electrode. This design provides more accurate guidance and the largest possible string electrode position deviation.

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Explanation of drawings- /

An exemplary embodiment is schematically illustrated in the drawing, where FIG. 1 application means with a central guide for the string electrode and 2d. Giant. 2 application means with edge guides for the string electrode.

Examples The invention

The application means is shown very schematically in the drawings, only the parts necessary to explain the invention being shown, and also those only schematically. The application means is part of the application device.

In the body of the coating means, a channel 4 is formed, which is filled with the polymer solution during the application, and a channel 3 perpendicular thereto for the passage of a string electrode (not shown) passes through the polymer solution channel 4. In the embodiment according to FIG. 1, a holder 6, 30 is accommodated in the body of the coating means, which extends into the channel 4 of the polymer solution. A pair of first guide elements 1 and a pair of second guide elements 2 perpendicular to it are accommodated in the holder 6.

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PS3867CZ /

Both pairs of guide elements 7, 2 are positioned so that the gap between the guide elements 1 or 2 of the respective pair lies in the polymer solution channel 4 at the passage of the string electrode channel 3 and the distance between them is less than the diameter of the string electrode channel 3. The guide elements are made of an abrasion-resistant material, preferably ceramic, and in the illustrated embodiment have the shape of cylindrical rods, which can be changed to another shape suitable for guiding the string electrode. Curves 5 in FIG. 1 show the area through which the string electrode can pass.

The channel 3 for the string electrode can also have a cross-section other than cylindrical, for example square or rectangular. In this case, the gap between the guide elements 1 or 2 of the respective pair is smaller than the smallest dimension of the string electrode channel 3.

The placement of the guide elements 1, 2 in the channel 4 of the polymer solution impairs the flow properties of this channel 4, and therefore the embodiment 15 shown in FIG. 2, in which two pairs of guide elements 1, 2, which are perpendicular to each other, are located at both ends of the application means and extend into the channel 3 for the string electrode. In this embodiment, the larger possible deviation y of the string electrode position shown in FIG. 2 curves 5.

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List of reference marks horizontal guide elements vertical guide elements application holes / string electrode channel polymer solution channel definition of maximum string electrode position deviation

A center part for fixing the guide elements

Claims (4)

PATENT CLAIMS Application of a polymer solution to a string spinning electrode of a device for the production of nanofibers by electrostatic spinning 5 of a polymer solution in a high-intensity electrostatic field comprising a string electrode channel (3) passing through a polymer solution channel (4), characterized in that in the channel (3) at least two pairs of guide elements (1, 2) perpendicular to each other are arranged for the string electrode, the gap between the guide elements (1) or (2) of the respective pair being less than at least 10 dimensions of the string electrode channel (3). Application means according to claim 1, characterized in that one pair of guide elements (1, 2) perpendicular to each other is accommodated in a holder (6) accommodated in the application body, the gap between the guide elements (1) or (2) the respective pairs lie in the channel (4) of the polymer solution 15 at the point of passage of the channel (3) for the string electrode. Application means according to claim 1, characterized in that two pairs of guide elements (1, 2) perpendicular to each other are located at both ends of the application means and extend into the channel (3) for the string electrode. Application means according to any one of claims 1 to 3, characterized in that the guide elements (1, 2) are made of an abrasion-resistant material.