KR910005019B1 - Long fiber nonwoven fabric manufacturing equipment - Google Patents

Abstract

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Description

Long fiber nonwoven fabric manufacturing equipment

1 is a perspective view of the device of the present invention.

2 is a sectional view taken along the line A-A of FIG.

* Explanation of symbols for main parts of the drawings

2: pressurized air jet filament traction device 4: body

6 reflecting portion 7 flat electrode

8: insulator block 9: outside air inlet

11: conductive metal plate 12: conical precipitation electrode

13: DC high voltage generator 15, 15 ': pressurized air jet

16: capture network

The present invention relates to a long-fiber nonwoven fabric manufacturing apparatus, and more particularly, by applying a high charge to the filament group pulled by the jet stream injected from the pressurized air jet filament traction device each of these filaments mutually by the repulsive force of the charge charged Long filament non-woven fabric with good dispersion of each filament and uniform density distribution of the formed web by controlling the scattering behavior from the left and right sides of the filament running direction alternately to pressurized air until it is formed into a web. It is intended to manufacture. The following are known as conventional methods for dissolving and dispersing a towed group of filaments.

First: using static electricity generated in the filament group.

Second: the method by mechanical rocking.

Third: Method for dispersing the filament group by shaking the left and right by spraying the separate pressurized air in a substantially perpendicular direction to the jet stream of the pressurized air dispersed in the pressurized air jet filament traction device.

Fourth: using an adapter having a collision surface curved at a constant angle with respect to the jet stream, and colliding the filament group to resolve, then swing the adapter to the left and right to disperse.

Fifth: Method of discharging by applying electric field to the filament group to be sprayed in the traction device of pressurized air injection type filament group.

Among the above methods, the method of dissolving, dispersing by pressurized air, or dissolving and dispersing by mechanical fluctuation is not sufficient for individual filaments of dispersing dissipation. There is a drawback in that it is impossible to produce high quality nonwoven fabrics by damaging the quality of the web with low density distribution and low unit weight of the whole, and the method of using the tribostatic static electricity on the filament is insufficient in the amount of charge due to the tribostatic static electricity. However, the method of applying static voltage to the filament group by forcibly applying a high voltage to the filament group is excellent in dissolving and dispersing individual filaments, but the density distribution of the entire web can be reduced if the scattering behavior of the filament is not controlled when sprayed with the pressurized air jet stream. There is a flaw that cannot be controlled.

The present invention imparts a high charge to a plurality of groups of dielectric organic polymers passing through a pressurized air jet filament traction device to a web forming zone so that each of these filaments are mutually dispersed by the repulsive force of charged charge, By controlling the scattering behavior until the formation of the web by spraying the pressurized air alternately from the left and right in the direction, it is possible to produce a high quality long fiber nonwoven fabric having a good dispersion of each filament and a uniform density distribution of the formed web. The bar will be described below with reference to the accompanying drawings.

The present invention is connected to the induction pipe (3) of the pressurized air injection type traction device (2) with a pressurized air inlet (1), the upper portion of the body (4) has the same diameter as the inner diameter of the induction pipe (3) The inlet part 5 which has is provided, and the inclined reflecting part 6 which has the filament advancing direction and the inclination angle (alpha) of about 10-30 degrees is formed directly under the inlet part 5. The front surface of the body 4 is provided with a plate-shaped electrode 11, and the back surface of the body 4 is provided with an insulator block 8 so as to face the plate-shaped electrode 7. An outer air inlet hole 9 is formed in the upper part of the insulator block 8, a recessed part 10 is formed in the inner wall of the insulator block 8, and the conductive metal plate 11 is fixed. The conductive metal plate 11 protrudes in a plurality of rows of conical precipitation electrodes 12 at regular intervals, and the conductive metal plate 11 is connected by a DC high voltage generator 13 and a high voltage cable 14. One side of the DC high-voltage generator 13 is connected to the plate-shaped electrode 7 with ground, so that a high electric field is formed between the precipitation electrode 12 and the plate-shaped electrode 7, and pressurized on both sides of the lower part of the body 4. The air injection ports 15 and 15 'are formed, and the collecting net 16 which is moved under the predetermined distance H is provided directly under the body 4, and is installed.

Referring to the operation and effects of the present invention configured as described above is as follows.

The filament flowing through the pressurized air jet filament traction device 2 into the induction pipe 3 collides with the reflector 6 having the traveling direction and the inclination angle α of the filament and reaches the flat electrode 7. , The high-pressure jet stream and the filament group impinged on the plate-shaped electrode (7) proceeds downward in the state of high speed, low pressure, wherein the outside air from the external air inlet (9) formed inclined on the upper portion of the body (4) Since the aspirator effect by the jet stream is sucked into the body 4, the flow of the jet stream is stabilized on the surface of the flat electrode 7, and the air in the body 4 is discharged from the flat plate 7. Since the film flows in a thin film or layer along the surface, the filament group is allowed to proceed in a stable state. Also, the filament group is dispersed by the air film, and the voltage is increased while supplying power to the DC high voltage generator 13. When the corona discharge is generated at the tip of the precipitation electrode 12 and a high electric field is formed between the plate electrode 7 and the precipitation electrode 12, the filament group passes between the plate electrode 7 and the precipitation electrode 12. Has a high charge, and thus, each filament is to increase the dispersing force by the repulsive force of the charged charge to promote mutual dispersion. Subsequently, the group of charged filaments passing through the electric field is perpendicular to the filament traveling direction in left and right alternating directions at the pressurized air injection holes 15 and 15 'formed at both ends of the lower end of the body 4 immediately before leaving the body 4. It is stacked by scattering to the mesh collecting net 16 running at a constant speed out of the body (4) while swinging left and right by the pressurized air injected in the direction. At this time, the filaments scattered from the body 4 decrease in speed, and due to the charges charged in the filament group, each filament is gradually attracted by the repulsive force of the charges charged on the surface, and each filament is sufficiently separated from each other Stacked on the net (16).

The filament's scattering distance ＂H＂ is the optimum distance for the charging repulsive force to be fully applied. Therefore, in order to maintain this, the body 4 and the trapping network (16) can be observed while dispersing and opening the individual filaments accumulated in the collecting network 16. It is desirable to install so that the distance between them can be adjusted. If the scattering distance ＂H＂ is short, the filaments accumulate in the collecting network 16 before they are fully opened, and if the distance is far, the scattering speed of the filament becomes too low, which causes the Tracking distribution control becomes impossible.

By using the apparatus of the present invention as described above, it is possible to produce a high quality long fiber nonwoven fabric having a very good dispersibility of individual filaments and a uniform density distribution.

Example 1-6

Table 1 shows the results when the large voltage between the plate-shaped electrode 7 and the precipitation electrode 12 and the distance H between the body 4 and the collecting network 16 were changed under the following conditions. .

Polymer used: polyester

Discharge amount: 1.17 g / min.Hole

Filament Number: 36

Supply air pressure of air jet filament traction device: 5.0 Kg / cm ²

Tilt angle α of the reflector 6: 25 °

The number of columns of the precipitation electrode 12: 5 bones / row × 2 rows

Distance between the plate-shaped electrode 7 and the precipitation electrode 12: 30 mm

TABLE 1

Claims (1)

In the lower part of the pressurized air jet filament traction apparatus 2, a body 4 is provided so that the plate-shaped electrode 7 and the insulator block 8 face each other, but the reflecting portion 6 inclined on the upper part of the body 4. And an inlet hole (9), fixing the conductive metal plate (11) having a plurality of conical precipitation electrodes (12) protruding from the inner surface of the insulator block (8), and the direct current high voltage generator (13) to the conductive metal plate (11). ) Is connected to the high voltage cable 14 and the DC high voltage generator 13 is grounded and the plate electrode 7 is grounded so that a high electric field can be formed between the precipitation electrode 12 and the plate electrode 7. The lower side of the body 4 forms pressurized air injection holes 15 and 15 'in a direction orthogonal to the direction of travel of the filament, and the collecting net 16 which runs in the horizontal direction directly below the body 4. Long fiber nonwoven fabric manufacturing equipment

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