JPH0772388B2 - Rotating dispersion plate for non-woven web - Google Patents

Description

TECHNICAL FIELD The present invention relates to a nonwoven web manufacturing apparatus. More specifically, a diffusing / swinging / rotating dispersion plate of reticulated filaments for a non-woven feb which has a mechanism for expanding a bundle of flash-spun reticulated filaments with a constant width to produce a uniform non-woven web.

[Conventional technology]

It is known as a flash spinning technique that a solution of a polymer kept at high temperature and high pressure can be discharged to a reduced pressure region to evaporate all the solvent to produce a continuous three-dimensional network structure fiber. Then, as a device for making a non-woven web from the reticulated structural fibers, as shown in Japanese Patent Publication No. Sho 42-19520, the bundle-shaped reticulated filaments coming out of the spinning nozzle are made to collide with a swinging trough or a locomotive device. Discloses a device for forming a widened and open reticulated filament and then depositing it on a moving collection surface to form a nonwoven web.

Further, as shown in USP 3,497,918, a disc part, a cylindrical part installed at the center of the disc as a device for widening and spreading the reticulated fiber, and a multi-lobed shape that extends from the side face of the cylindrical part to the disc surface with an inclination Rotary impingement plates with skirts are also known. And the technique which gives an electric charge to a fiber by corona discharge before depositing these fibers on a collection surface is also disclosed.

[Problems to be solved by the invention]

The inventors of the present invention have conducted various studies on the filament opening and dispersing technique for forming the flash-spun filament into a nonwoven web, and a method of colliding the filaments with a rotating dispersion plate rotating at a high speed to open and disperse the filament is a high-speed production of the nonwoven web. Focused on being suitable for. However, no satisfactory web could be obtained no matter how well these known devices were used. These dispersion-deposited webs contain a large number of converged bundles of reticulated filaments, and there are places with a low fiber density, which results in a large basis weight, and in fields such as filters where sheet uniformity is required and 40g / It could not be used to produce low basis weight webs of m ² or less. This is because it is difficult to obtain a uniform dispersed web because the flash spun filament is a three-dimensional reticulated fiber. That is, unlike the ordinary spunbonding method in which spun filaments are deposited individually, the filaments connected in a net shape must be uniformly spread and dispersed.

Therefore, there is a need for a new technique for making flash-spun reticulated fibers into a uniform web, but no technique has yet emerged to satisfy it.

It is an object of the present invention to provide a uniform flash-spun nonwoven web that can be fully used in the field of filters and the like. More specifically, it is an object of the present invention to provide a novel apparatus for pursuing and removing the nonuniformity of the basis weight and providing a flash-spun nonwoven web having a uniform basis weight.

[Means for solving problems]

The inventors of the present invention used a high-speed imaging device (Strobe Vision Analyzer SVA.1 manufactured by Sugawara Laboratories) to clarify the cause of the non-uniformity existing in the non-woven web. The falling state of the reticulated filament was traced by a 1 / 300,000 second instantaneous photograph.

As a result of the observation, it was found that the largest cause of the non-uniformity of the nonwoven web was the shape of the leaflet-like skirt portion of the rotary dispersion plate.

That is, the leaflet skirt part of the rotary dispersion plate disclosed in USP 3,497,918 consists of a swing part and a buffer part, and the opening width of the reticulated filament collided with the rotary dispersion plate was observed by observing the filament with an instantaneous photograph. Is greatly different between the oscillating surface that oscillates the filament and the buffer surface that alleviates abrupt changes in the oscillating direction. It was confirmed that tension generated in the running filament due to resistance and deteriorated the opened state of the reticulated filament opened by collision (convergence of reticulated filament, non-uniform opening, etc.). And this significantly impairs the uniformity of the resulting nonwoven web.

Therefore, the present inventors arrived at the present invention as a result of earnest research to achieve the object of the present invention based on the above-mentioned findings.

An object of the present invention is to provide a rotatable disc portion, a cylindrical portion having a circular outer surface extending vertically from the center of the disc portion and having a diameter smaller than that of the disc portion, one surface of the disc portion and an outer portion of the cylindrical portion. A plurality of oscillating surfaces, each of which is composed of a skirt portion inclinedly arranged in a space between the surface and the skirt portion, and which oscillates a reticulated filament coming in a direction substantially parallel to an axis of the cylindrical portion; A reticulated filament arranged alternately with the oscillating surface and configured as a buffer surface for guiding the reticulated filaments flying in the above-mentioned direction substantially downward and in the vertical direction to alleviate a sudden change in the oscillating direction. The diffusing / swinging / rotating dispersion plate, wherein the swinging surface is formed of a substantially flat skirt portion, the swinging surface is a convex curved surface, and the center of the swinging surface is With respect to the inclination angle α formed by the disk portion, The angle of inclination β between the center of the contact surface and the upper surface of the disk is in the range of α ± 5 °. The reticulated filament formed by the fan-shaped skirt is wider near the disk than near the cylinder. This is achieved by a diffusing / oscillating dispersion plate.

In the present invention, a rotation dispersion plate is used in which the relationship between the angle α formed by the center of the oscillating surface of the skirt and the disk surface and the angle β formed by the buffer surface and the disk surface is within the range of β = α ± 5. With this, the spread width of the filament can be made uniform over the entire circumference of the rotary dispersion plate, and the spread filament after the collision of the rotary dispersion plate is dropped on the collecting surface while maintaining a predetermined reticulated filament spread width, A woven fabric-free non-woven fabric having a uniform basis weight distribution, which consists of converging portions of reticulated filaments, is obtained.

Originally, since the flash-spun filament has a continuous three-dimensional network structure, even a filament that has been opened for a while has the property of being easily converged into a bundle filament with a width of several millimeters with a slight tension acting on the filament.

When the reticulated filament colliding with and widened by the rotary dispersion plate travels in the space region between the rotary dispersion plate and the web collecting surface, tension is generated by viscous resistance with the atmosphere. This tension causes the width of the widened reticulated filament to be reduced.

For this reason, the skirt portion of the rotary dispersion plate has a buffering portion between the colliding filament rocking portions to prevent a sudden change in the swing direction of the filament, which is a characteristic of the rotary dispersion plate. It is preferable.

However, as disclosed in USP 3,497,918, when the buffer surface of the rotary dispersion plate has a wedge shape in which the width near the cylindrical portion is wider than the width near the disk portion, the inclination of the buffer surface is larger than the inclination angle α of the filament oscillating surface. The angle β is inevitably small, and the filament collision angle θ in the explanatory view of the action of the rotary dispersion plate on the filaments shown in FIG. 3 is different between the oscillating surface and the buffer surface. This impingement angle induces web non-uniformity. That is, in the skirt portion of the rotary dispersion plate, when the angles α and β formed by the rocking surface and the cushioning surface with respect to the disc are different, the widening ratio of the reticulated filament is greatly different between the swinging portion and the cushioning portion, and the filaments are trapped. The amount of momentum to run on the collecting surface is also different. When dispersion is performed using such a rotary dispersion plate, the tension generated in the filament changes pulsatingly, and the filament falling on the collecting surface partially converges to a width of several millimeters. Also, since the falling speed is different in the continuous filament, the filament is also buckled.
Nonwoven webs obtained from such filaments have poor basis weight uniformity and the disadvantage is the presence of mulches of bundling yarns in the web. From the viewpoint that it is required from the uniformity of the deposited web to disperse and drop the running filament with a uniform spread width, the present inventors have manufactured various shapes of the rotary dispersion plate to collect the filament. The falling state on the surface was traced and observed at the instantaneous state of 1 / 300,000 seconds.

The rotary dispersion plate according to the present invention is configured to guide the filament to the collecting surface while keeping the shape of the filament which has been sufficiently widened and spread.

The high-speed fluid and filament ejected from the nozzle are expanded and spread into a fan shape with the same width regardless of whether they collide with the rocking part or the buffer part in the skirt, and the falling velocity in the direction of gravity is almost constant. The filamentous filaments are guided onto the collecting surface without generating tension to converge them. Of course, the fluid ejected from the nozzle is partially scattered into the atmosphere when colliding with the rotary dispersion plate, but most of the fluid functions to guide the filament to the collecting surface.

With such a rotating dispersion plate, the resulting nonwoven web is surprisingly free of multi-parts of convergent filaments that can be detected by the laser light transmission method, and the reticulated filament width in the web is almost constant over the entire area. The unit weight distribution was extremely uniform. Being able to produce such a uniform nonwoven web can expand the range of application of flash-spun filaments having excellent characteristics as a special fiber as a nonwoven sheet, and its usefulness is immeasurable.

The "uniform non-woven web" referred to in the present invention has a basis weight of 20 to 50.
Basis weight variation per 25 cm ² in the width direction in the 0 g / m ² which means that it contains within 20% of the average basis weight.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings showing an embodiment of a rotary dispersion plate of the present invention.

In FIGS. 1, 2a and 2b, reference numeral 2 denotes a cylindrical projection, which serves to prevent the filament hitting the skirt 3 and the high-speed air stream from being blown upward. Reference numeral 1 denotes a disk portion which controls the traveling direction of the filament deflected by the skirt portion 3. The skirt portion 3 swings the widened filament for widening the filament and widening the web.

The skirt portion 3 is formed as a continuous surface in which rocking surfaces 4 and buffer surfaces 5 are alternately arranged, and usually 2 to 5 rocking surfaces 4 are arranged.

Preferably, the oscillating surface 4 is formed in a substantially planar shape, and the buffer surface 5 is formed in a substantially convex curved surface shape. Swing surface 4
"Is substantially flat" means that the intersecting line 15 between the oscillating surface 4 and the disk surface is substantially straight as shown in FIG. 2a. The intersecting line 15 may be a curved surface having an extremely gentle curvature, that is, a concave surface or a convex surface as long as the filament can be smoothly swung. The connecting end shape between the rocking surface 4 and the buffer surface 5 is formed so that the shape of the adjacent buffer surface 5 is a fan shape in which the width near the disk portion is wider than the width near the cylindrical portion. Must be

The fact that the buffer surface 5 is a substantially convex curved surface means a conical curved surface in which the height Y ₂ of the line of intersection with the cylindrical portion 2 shown in FIG. 2 (b) is constant. However, a flat surface or a polyhedral curved surface composed of several flat surfaces may be used as long as it retains the role of a buffer surface.

Further, both the swinging surface 4 and the cushioning surface 5 may be connected to the side surface of the cylindrical portion 2 and the upper surface of the disc portion 1 smoothly with a curvature.

The relationship between the inclination angle α formed by the rocking surface 4 of the skirt portion 3 and the surface of the disk 1 shown in FIG. 2 (b) and the angle β formed by the buffer surface 5 and the front circle of the disk 1 is α = β ± 5 ° Preferably,
It is important that α = β to achieve the object of the present invention. When this relationship is satisfied, the buffer surface 5 has a fan shape in which the width near the disk portion 1 is wider than the width near the cylindrical portion 2. As disclosed in USP 3,497,918, when the width of the buffer surface 5 near the disk portion 1 has a narrower wedge shape than the width near the cylindrical portion 2, the inclination angle α of the rocking portion 4 is The inclination angle β of the oscillating portion 5 does not satisfy the above relationship, and the inclination angle β of the buffer portion 5 is necessarily smaller than the inclination angle α of the oscillating portion 4. The action of the rotary dispersion plate on the filament is shown in FIG.

The inclination angle α is preferably in the range of 30 ° to 60 ° and is selected depending on the discharge flow rate and the desired web width. When the inclination angle α is large, both the filament and the high-speed fluid lose a small amount of momentum due to collision, so that the filament has a large amount of momentum to lead to the collecting surface, resulting in a wide web.

The shapes of the swing surface 4 and the buffer surface 5 of the rotation dispersion plate are the second
If the lengths of X ₁ , Y ₁ , X ₂ , and Y ₂ shown in FIG. 2B and the distribution center angles γ and η of the swing surface 4 shown in FIG. 2A are determined, they are automatically determined. . The relationship between X ₁ and Y ₁ and X ₂ and Y ₂ is determined by the relationship between the inclination angles α and β.

As shown in FIG. 3, the reticulated filament bundle 11 ejected from the nozzle 8 together with the high-speed fluid collides with the skirt portion 3 of the rotary dispersion plate provided near the tip of the nozzle 8 to widen and spread the fiber. Change the traveling direction of the filament. The filament oscillating surface 4 and the cushioning surface 5 forming the skirt portion 3 are arranged with an inclination of θ with respect to the nozzle axis 9.

As shown in FIG. 3, the reticulated filaments are expanded by the corona discharge device 12 or the like placed downstream of the rotary dispersion plate immediately after being discharged from the rotary dispersion plate to give the reticulated fibers to the reticulated fibers. It is preferable because the fibers can be uniformly opened to obtain a more uniform nonwoven web. In this case, in the device according to the present invention, since the degree of widening and opening of the reticulated filaments discharged from the rotary dispersion plate is uniform over time, the dispersion state due to static electricity obtained by the corona discharge device can be made extremely uniform. .

As a result, the filaments opened can be stably collected on the collecting surface.
Since it can be deposited on the collection surface 13, the disturbance of the web due to the air flow on the collection surface can be suppressed, and the uniformity of the nonwoven web can be further improved.

FIGS. 4 (a) and 4 (b) are schematic views of the state of action of the rotating dispersion plate of the present invention, which is rotating at high speed, on the filaments, observed with the above-described high-speed imaging apparatus.

The rotation dispersion plate uses a 200W servo motor and is shown in Fig. 3.
Rotation was carried out at 100 to 3000 rpm with 14 as the rotation axis, and the actual number of oscillations of the filament was 300 to 9000 rpm.

FIG. 4 (a) shows a state in which the filament colliding with the central portion of the oscillating surface 4 is broadening on the rotary dispersion plate and falling in a substantially vertical direction. FIG. 4 (b) shows that the filament rotated about 50 ° from FIG. 4 (a) and the filament colliding with the right end of the oscillating surface 4 of the rotary dispersion plate is widened on the rotary dispersion plate, and is inclined diagonally to the left in the drawing. It shows the state of falling. In Fig. 4 (c), the filament is rotated about 10 ° more than in Fig. 4 (b), and the filament colliding with the central portion of the buffer surface 5 of the rotary dispersion plate spreads on the rotary dispersion plate and drops in a substantially vertical direction. It shows the state. FIG. 4 (d) rotates about 10 ° more than FIG. 4 (c),
It shows a state in which the filament colliding with the left end portion of the oscillating surface 4 of the rotary dispersion plate is widening on the rotary dispersion plate and falling in the diagonally right direction on the drawing. As shown in FIGS. 4 (a) to 4 (d), the filaments colliding with the rotary dispersion plate are expanded and spread in a fan shape, and the line of intersection (oscillation) between the skirt portion 3 and the upper surface of the disc portion 1 is swung. From the line of intersection 15 between the surface 4 and the upper surface of the disk 1 or the line of intersection 16 between the buffer surface 5 and the upper surface of the disk 1 16) in the direction perpendicular to the filament collision point 17, maintaining the widening filament shape. Then, it is guided to the collecting surface 13 together with the fluid.

Further, FIGS. 4 (a), 4 (b) and 4 (d) showing the state of dropping of the filament after the collision of the filament oscillating surface 4 of the rotary dispersion plate and the filament after collision with the buffer surface 4. Comparing with FIG. 4 (c) showing the falling state, it is confirmed that the widened and spread state of the filament is almost the same until it is guided to the collecting surface 13. In addition, unevenness of opening, partial filament convergence, and buckling in air are not observed.
That is, even during the high speed rotation of the rotary dispersion plate, the widening and opening width of the filament does not change depending on the position of the collision point and swings to guide the traveling filament uniformly onto the collecting surface.

FIGS. 6 (a) to 6 (d) show the action on the filament of the rotary dispersion plate having a wedge-shaped buffer surface disclosed in FIGS. 3 and 4 of USP 3,497,918. 4 (a)
FIG. 5 is a schematic view observed by the same method as in FIGS. 4 (d).

The stationary state positions of the rotary dispersion plate in FIGS. 6 (a) to 6 (d) correspond to those in FIGS. 4 (a) to 4 (d), respectively.

Compared with the widening spread width H1 of the filament that collided with the swing surface 4 shown in FIGS. 6 (a), 6 (b) and 6 (d), the buffer surface 5 shown in FIG. 6 (c). It was confirmed that the widening spread width H2 of the filament collided with was about 1.5 to 2 times as large. Although the reason has not been clarified, the spreadability is not uniform.

As the filament widening and opening width changes as observed, the tension generated by the falling traveling filament is
Because it changes pulsationally during rotation of the rotating dispersion plate, 6 (a)
It is confirmed that the buckling part and the partially converging part of the widened filament as shown in FIGS. 6 (b) and 6 (d) are induced.

FIGS. 5 (a), 5 (b) and 5 (c) show that the buffer surface 5 constituting the skirt portion 3 is a polyhedral curved surface and the skirt portion is divided into two in the rotary dispersion plate of the present invention. This is an example. The tilt angle α of the swing surface 4 and the buffer surface 5
The inclination angle β of is constant.

The filament supplied and used in the dispersing device of the present invention is, for example, an organic fiber such as polypropylene, polyethylene, polyester, polyamide, etc., and is usually introduced in a net-like form. Good.

Further, as the spinneret assembly for obtaining the filaments to be supplied to the dispersing device, any conventionally known shape and size may be used.

There is no limitation on the advancing speed of the filament group used in the present invention, and a range of 3000 to 15000 m / min is usually used.

By using the rotating dispersion plate of the present invention, the filament has a constant tension generation state even in a high-cycle pendulum motion, and there is no change in the widening yarn width between the outlet of the rotating dispersion plate and the collecting surface, and no buckling. It is possible to obtain a uniform web with extremely good single-thread openability. The nonwoven web obtained by the rotary dispersion plate of the present invention can be developed for various applications such as a filter field by utilizing a high degree of uniformity.

〔Example〕

Hereinafter, the present invention will be specifically described with reference to examples, and the performance of the nonwoven fabric obtained by using the apparatus of the present invention will be shown.

Example 1 A high density polyethylene resin having a melt index (MI) of 5 was dissolved in a trichlorofluoromethane solvent to give a concentration of 13
A wt% solution passes through a decompression orifice with a diameter of 0.6 mm and a length of 5 mm, is decompressed in a decompression chamber with a diameter of 8 mm and a length of 40 mm, and then flash-spun through a nozzle with a nozzle diameter of 0.75 mm and a length of 0.75 mm. did.

Table 1 shows the spinning conditions and yarn physical properties.

The spun filaments and the gas stream were fed to a rotating dispersion plate of the present invention which was placed at a distance of 1 mm in the horizontal direction from the spinneret and perpendicular to the spinneret axis to produce a nonwoven web.

As the rotary dispersion plate of the present invention, one having three oscillating surfaces similar to the rotary dispersion plate illustrated in FIGS. 2a and 2b was used. The dimensions of the rotary dispersion plate are as follows: disk diameter D ₁ 100 mm, cylinder diameter D ₂ 40 mm, and the swaying surface that makes up the skirt has an inclination angle α.
= 45 ° (X ₁ = 10 mm, Y ₁ = 10 mm), center angle γ = centered on the disc rotation axis at the intersection line where the oscillating surface and the cylindrical side surface contact
106.2, a plane defined by a central angle η = 75.7 ° centered on the disc rotation axis of the intersection line where the oscillating surface and the disc surface contact. The buffer surface has an inclination angle β = 45 ° (X ₂ = 18 mm, Y ₂ =
18 mm) and both ends were continuous with the flat surface.

This rotating dispersion plate has a rotation speed of 1000 rpm, 2000 rpm, 3000 rpm.
I rotated it.

The filament discharged from the rotary dispersion plate was subjected to corona discharge and electrically charged. This corona discharge was performed by applying a negative DC high voltage of about 20 kv to electrode needles arranged in a semicircular shape around a rotating disk with 16 needles and 16 needles.

By setting the distance between the lowermost part of the rotary dispersion plate and the net conveyor to 200 mm and rotating the rotary dispersion plate, the filament was provided at the bottom of the net conveyor while being pendulum-moved in a rocking cycle three times the number of revolutions. With the aid of the suction duct, a uniform nonwoven web with an effective width of about 35 cm above and below the net conveyor was formed.

The moving speed of the net conveyor was 20 to 40 m / min corresponding to the rotation speed of the rotary dispersion plate. The non-woven web thus formed was subjected to hot pressing with a full pressure roll (temperature of 128 ° C.) to obtain a non-woven fabric.

The unit weight uniformity and microdispersibility of the non-woven fabric thus prepared are shown in Table 2.

* Width-wise basis weight fluctuation rate A value obtained by dividing the R value of the basis weight distribution measured every 5 cm in the width direction by the average basis weight.

* Laser beam spreadability evaluation He-Ne laser beam with a beam diameter of 2.5 mmφ is applied to the nonwoven fabric, the amount of transmitted light that passes through the nonwoven fabric is measured with a laser power meter, and fluctuations in the transmitted light amount in the width direction are continuously measured. Judgment of micro dispersibility for each small area.

Evaluation criteria ○: In the transmitted light amount distribution continuously measured in the width direction of the nonwoven fabric every 3 mm in the length direction of the nonwoven fabric, there is no mulch or hole whose light amount difference from the average transmitted light amount exceeds 25% of the average transmitted light amount. .

Δ: There are a few mulches and holes exceeding 25% of the average transmitted light amount.

X: There are many mulches and holes exceeding 25% of the average transmitted light amount.

From Table 2, the variation of basis weight is within 20%, and the openability is ○.
It was evaluated that it was proved that a uniform nonwoven fabric was obtained by the rotating dispersion plate of the present invention.

Comparative Example The non-woven fabric obtained was carried out under the same conditions as in Example 1 except that the rotary dispersion plate was changed to the one having the skirt shape shown in Table 3, and Table 3 shows the basis weight uniformity and spreadability of the obtained nonwoven fabric. The rotation speed of the rotary dispersion plate was 3000 rpm, and the net moving speed was 20 m / min.

As is clear from Table 3, a uniform nonwoven fabric could not be obtained with the rotary dispersion plate having a shape other than the shape of the skirt specified in the present invention.

Example 2 Table 4 shows the basis weight uniformity and spreadability of a nonwoven fabric obtained by performing the same conditions as in Example 1 except that the rotary dispersion plate was changed to the skirt portion shape shown in Table 4. The rotation speed of the rotary dispersion plate was 3000 rpm, and the net moving speed was 20 m / min.

The non-woven fabric obtained as shown in Table 4 satisfied the uniformity sufficiently.

Example 3 When a non-woven web having a width of 100 cm and made of high-density polyethylene reticulated filament was obtained by the flash-spinning method by the spunbond method, the same spinneret as in Example 1 was arranged with a spacing of 280 mm in the width direction of the web and a length direction of the web. Were arranged at intervals of 280 mm, and spinning was performed under the same spinning conditions as in Example 1. The filaments ejected from the respective spinnerets were arranged at a distance of 1 mm in the horizontal direction from the spinneret Example 1
A non-woven web was prepared by feeding the same rotary dispersion plate of the present invention as described above.

The distance between the bottom of the rotary dispersion plate and the net conveyor was set to 150 mm.

By synchronously operating the rotary dispersion plate of each weight at 3000 rpm, the filaments are deposited on the moving net conveyor with the aid of the suction duct provided at the bottom of the net conveyor while performing a pendulum motion at a swing cycle of 9000 c / min. And then accumulated sequentially.

The formed nonwoven web has an effective width of 100 cm and a basis weight of 40 g / m ^2.
The variation in unit weight in the width direction was 18%, and the laser openability was evaluated to be very uniform.

〔The invention's effect〕

Since the rotational dispersion plate of the non-woven web according to the present invention is configured as described above, it is possible to obtain a web having a uniform basis weight and an excellent spreadability by using this rotational dispersion plate over the entire required width. You can Therefore, by using the rotary dispersion plate according to the present invention, it is possible to easily deal with a nonwoven fabric having a high degree of uniformity and a low basis weight of 30 g / m ² or less, which is desired for the final use of the nonwoven fabric.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an example of the shape of the rotary dispersion plate of the present invention. FIG. 2 is a diagram showing the details of the shape of the rotary dispersion plate of FIG. 1. FIG. 2 (a) is a plan view and FIG. 2 (b) is a line AA 'in FIG. 2 (a). FIG. FIG. 3 is a schematic front view for explaining the action of the rotary dispersion plate of the present invention on the filament. FIGS. 4 (a) to 4 (d) are schematic diagrams of observation by a high-speed imaging apparatus, which sequentially explain the action of the rotary dispersion plate of the present invention on the filament in detail. FIG. 5 is a diagram showing another embodiment of the present invention.
FIG. 5 (a) is a plan view and FIG. 5 (b) is a line A in FIG. 5 (a).
FIG. 5 (c) is a sectional view taken along line BB 'in FIG. 5 (a). FIGS. 6 (a) to 6 (d) are schematic diagrams of observation by a high-speed imaging apparatus for explaining in detail the action of a conventionally known rotary dispersion plate on a filament in order. 1 ... Disk part, 2 ... Cylindrical part, 3 ... Skirt part, 4 ... Filament oscillating surface, 5 ... Buffer surface, 6 ... Flat surface inclination angle, 7 ... Convex curved surface inclination angle, 8 ... Spinneret, 9 ... Spinneret shaft, 10 ... Filament reflection angle, 11 ... Filament, 12 ... Corona discharge electrode, 13 ... Net conveyor, 14 ... Suction duct, 15 ... Oscillating surface And the disc surface, 16 …… The intersection line between the buffer surface and the disc surface.

Claims (1)

[Claims] 1. A rotatable disc portion, a cylindrical portion having a circular outer surface extending vertically from the center of the disc portion and having a diameter smaller than that of the disc portion, one surface of the disc portion and an outer surface of the cylindrical portion. A plurality of oscillating surfaces, each of which comprises an inclined skirt portion disposed in a space between the skirt portion and the skirt portion, and which oscillates the reticulated filaments flying in a direction substantially parallel to the axis of the cylindrical portion; Diffusion of reticulated filaments, which is arranged alternately with the oscillating surface, and which is configured by a buffer surface that guides the reticulated filaments flying in the above-mentioned direction substantially downward to the vertical direction and alleviates sudden changes in the reciprocating direction. A rocking and rotating dispersion plate, wherein the rocking surface is formed of a substantially flat skirt portion, the rocking surface is a convex curved surface, and the center of the rocking surface and the disk With respect to the inclination angle α formed by the The angle of inclination β between the center and the upper surface of the disk is in the range of α ± 5 °. Diffusion of the reticulated filament formed by a fan-shaped skirt near the disk is wider than near the disk. Swing dispersion plate.