JP2001207368A - Apparatus and method for producing nonwoven fabric of filament - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus capable of producing both regular filament nonwoven fabrics and composite filament nonwoven fabrics, in particular for producing continuous fiber nonwoven fabrics with good formation, slight distribution unevenness, and small difference in mechanical strength between longitudinal and transverse directions, thus excellent in so-called uniformity, and to provide a method for producing such a continuous fiber nonwoven fabric using the above apparatus. SOLUTION: This apparatus for producing filament nonwoven fabrics has a melt spinning machine, a spinneret for conjugate fivers or the like, an air stream draft device for drafting melt-spun filaments by the aid of air stream, an air stream-diverting device with a number of slant grooves on the inner surface, a collector for collecting filaments issued from air stream-diverting device, a heat treatment device, etc. The other objective method for producing a filament nonwoven fabric using the above apparatus comprises the following process: conjugate filaments or the like are melt- spun, then opened into single filaments through the air stream-diverting device, the single filaments are then diverted slantly, and a uniform filament web is collected; subsequently, the web is heated to a temperature higher than the thermofusing temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for producing a long-fiber nonwoven fabric. More specifically, the present invention relates to an apparatus and a method for producing a thermoplastic long-fiber nonwoven fabric having a good formation, a small number of spots, and a small difference in strength between the nonwoven fabric in the longitudinal direction and the transverse direction.

[0002]

2. Description of the Related Art A long-fiber nonwoven fabric is obtained by melt-spinning a thermoplastic resin from a spinneret, collecting the long-fiber group on a net conveyor while pulling the long-fiber group by an airflow traction device to form a web, and subjecting the web to a heat fusion treatment. This is a nonwoven fabric produced by Such a nonwoven fabric is generally referred to as a spunbonded nonwoven fabric because it is manufactured by an integrated facility from the spinning process of long fibers, and is advantageous in terms of high productivity and cost competitiveness of the nonwoven fabric.

However, in this production method, the web is formed using a high-speed airflow as a medium, and the dispersion of long fiber groups is often left to the dispersion of this airflow. Therefore, it is extremely difficult to uniformly disperse and distribute the long fiber group over the entire surface of the nonwoven fabric. In other words, there is a problem that the formation of the nonwoven fabric is poor, and that the nonwoven fabric tends to have a noticeable unevenness. or,
There is also a problem that the long fiber group constituting the nonwoven fabric tends to be arranged in the moving direction of the net conveyor, that is, the longitudinal direction of the nonwoven fabric, and the difference in strength between the longitudinal direction and the lateral direction tends to increase.

[0004] In particular, in the nonwoven fabric having many spots, the strength in the lateral direction is remarkably reduced in the thin portion. Further, these phenomena become more pronounced in low-weight nonwoven fabrics produced at a high conveyor speed. For example, the basis weight of the nonwoven fabric is about 4
To 30 g / m ² If you around more nonwoven basis weight unevenness in thin of using an article such as a direct contact with human skin as such as a disposable diaper, broken or nonwoven from a thin portion thereof basis weight,
Other functional agents, such as pulp and polymer liquid absorbent, used together may leak inside. Further, when a similar nonwoven fabric is used for an agricultural sheet or the like for shading or keeping heat, spots may be formed on the light-shielding properties and heat insulating properties, and the growing state of the crop may be uneven.

Various techniques have been proposed as a method for improving the formation of a long-fiber nonwoven fabric, improving the uniformity of a so-called nonwoven fabric having less spots and a small difference in strength between the vertical and horizontal directions. For example, Japanese Patent Application Laid-Open No. 48-18576 discloses a suction device having a linear slit-type structure, and a guide device for a group of long fibers arranged immediately before an airflow traction device according to the present invention. A method for producing a nonwoven fabric web, which is characterized by equally dividing a group and vibrating a guide device in a width direction, and a production device thereof are disclosed.

However, this guide device requires a guide for separating the long fiber group, and the long fiber group is always spun in a state of being in contact with the guide. It is difficult to cope with high-speed spinning of fine fibers. Further, the raw material resin peeled from the fiber is liable to be deposited, and there is a problem that the deposited material is mixed with the nonwoven fabric in a lump. And when you start spinning,
Since it is necessary to equally divide the long fiber group into guides, the workability is poor, and a large number of long fiber groups cannot be passed through one guide, which causes a problem in productivity.

Japanese Patent Application Laid-Open No. 8-109565 discloses that
A technique is disclosed in which a long fiber group is pulled by a high-speed airflow pulling device and collided with a reflector for spreading, and then passed between high-speed airflow rectification devices to collect a web. This high-speed airflow rectifier suppresses the diffusion of the airflow generated by the reflector for spreading and the fluctuation of the long fiber group, so that it is possible to manufacture a nonwoven fabric with less spotting. However, despite the fact that the dispersion state of the long fiber group is extremely important to obtain a nonwoven fabric having a good formation, even if the long fiber group is spread with the opening reflector, the fiber is still sufficiently spread. In a non-existent state, the diffusion of the airflow which promotes the fiber opening is suppressed by the high-speed airflow rectifier, so that it is not possible to obtain a satisfactory nonwoven fabric having a satisfactory formation. In addition, since the diffusion of the long fiber group in the horizontal direction can be suppressed, it is insufficient to reduce the difference between the strength in the vertical direction and the strength in the horizontal direction of the nonwoven fabric. Furthermore, since the long fiber group always collides with the opening reflector, the resin component is separated from the fibers by the impact and the resin is deposited on the reflector, so that it is difficult to obtain a uniform nonwoven fabric over time. It is.

Japanese Patent Application Laid-Open No. 1-260060 discloses that
After the long fiber group is pulled by air soccer, at least a part of the long fiber group is caused to collide with a collision plate installed on the opposite side of the web traveling direction, and the collided long fiber group forms an angle with the web traveling direction. There is disclosed a technique in which a high-speed airflow is blown obliquely downward from the lower part of a collision plate so that the airflow is collected. According to this, it is possible to arbitrarily adjust the so-called strength difference between the so-called longitudinal direction and the transverse direction of the strength of the nonwoven fabric along with the arrangement direction of the long fiber group, and to obtain a web having excellent dispersion uniformity of the long fiber group. It is said that it can be obtained.

However, between the lower part of the impingement plate and the upper part of the conveyor surface, there exists a high-speed airflow of a bipolar flow perpendicular and oblique to the conveyor surface, and turbulence and flow near the interface of each flow are generated. There is a drawback in that a vortex phenomenon occurs, and a phenomenon in which some long fibers existing there lie close to each other, so-called twisting occurs. This phenomenon appears remarkably when trying to emphasize the degree of isotropicity, and tends to be a nonwoven fabric in which fiber bundles are mixed. In addition, because the collision plate is used,
The same harmful effects as those described in JP-A-8-109565 are caused by the collision plate. Furthermore, although it is possible to produce at low energy cost, energy for generating an oblique high-speed airflow is a necessary condition, and that cost must be added.

Japanese Patent Application Laid-Open No. 50-138115 discloses a jet spinning take-off body comprising a guide cylinder in which grooves are formed on both inner wall surfaces of a jet body and a passage of a long fiber group in parallel with the spinning direction. A so-called air soccer is disclosed. According to this device, the high-speed gas fluid injected from the injector is rectified in the groove of the guide cylinder, so that the long fiber group is well separated in the width direction of the air sucker, and travels uniformly to be discharged. It is said that.

However, when the density of the long fiber group is viewed locally, it cannot be said that it is necessarily distributed uniformly.
That is, since the guide cylinder has a number of grooves in the width direction, a wide portion and a narrow portion of the inner wall surface are regularly repeated. In addition, since the long fiber group travels along the groove, it is obvious that the long fiber group gathers at a place where the interval between the inner wall surfaces is wide and decreases at a place where the interval is small.

Therefore, although the distribution of fibers looks uniform in the width direction as a whole, the density of the long fiber group varies from local to local, so that a nonwoven fabric of good formation cannot be obtained.
In addition, this phenomenon is conspicuous when the difference between the inner wall surfaces is large, and fiber bundles are likely to be generated at locations where the density of long fiber groups is high. Furthermore, since the long fiber group is discharged and collected perpendicularly to the conveyor surface, the long fiber group is easily arranged in the web transport direction, and the difference between the strength of the nonwoven fabric in the longitudinal direction and the strength in the horizontal direction increases. There is.

[0013]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a long-fiber nonwoven fabric which has a simple apparatus as a whole, has a good formation of the nonwoven fabric, has less spotting, and has a small difference in strength between the nonwoven fabric in the longitudinal and transverse directions. To provide a manufacturing apparatus. Another object of the present invention is to provide an apparatus which can be manufactured simply by replacing the airflow diverting plate having a simple linear groove formed on the inner surface of the nonwoven fabric or adjusting the gap of the fiber passage portion. It is to provide. Furthermore, it is applicable to wide non-woven fabric,
Moreover, an object of the present invention is to provide a long-fiber nonwoven fabric manufacturing apparatus which can be applied to any of a regular long-fiber nonwoven fabric and a composite long-fiber nonwoven fabric. Another object of the present invention is to provide a method for producing a long-fiber nonwoven fabric using the apparatus.

[0014]

Means for Solving the Problems The present inventors have intensively studied to solve the above-mentioned problems. As a result, the following solution has been reached.

(1) A spinneret, an airflow pulling device for pulling a group of long fibers spun from the spinneret by an airflow, changing the traveling direction of the group of long fibers ejected from the airflow drawing device, and dispersing the group of long fibers. An airflow diverting device for promoting the airflow diverting device, and a conveyor for collecting and transporting long fibers ejected from the airflow diverting device, the airflow diverting device having a widthwise length of the airflow traction device, and An apparatus for producing a long-fiber nonwoven fabric, comprising at least one airflow diverting plate having a large number of airflow diverting grooves cut in non-parallel to a fiber spinning direction on an inner surface.

(2) A pair of airflow diverting plates are provided with a gap (s) between the long fiber passage portions therebetween, and the airflow diverting grooves cut in each airflow diverting plate coincide with each other. 2. The long-fiber nonwoven fabric manufacturing apparatus according to the above item 1, wherein the long-fiber nonwoven fabric manufacturing apparatus is arranged so as to perform the following.

(3) The apparatus for producing a long-fiber nonwoven fabric according to the above (1) or (2), wherein the internal angle of the internal angle air flow diverting groove formed in the inner surface of the air flow diverting plate is 3 to 50 degrees.

(4) The width (w), depth (d), and pitch (p) of the airflow diverting groove formed on the inner surface of the airflow diverting plate are 0.5 to 20 mm, 0.5 to 20 mm, respectively. 4. The apparatus for producing a long-fiber nonwoven fabric according to any one of the above items 1 to 3, which has a length of 1.5 to 30 mm.

[0019] (5) long fiber according to any one of the air flow varying Kezu設volumetric airflow deflection groove in the inner surface of the counter plate is 1 to 20 cm ^3/10 cm ² of the first to fourth terms Nonwoven fabric manufacturing equipment.

(6) The airflow diverting grooves formed in the inner surface of the airflow diverting plate are different from each other in length but are formed in the same row. 2. The apparatus for producing a long-fiber nonwoven fabric according to claim 1.

(7) The apparatus for producing a long-fiber nonwoven fabric according to the above (1), wherein the airflow diverting device comprises a gap width adjusting device for a long-fiber passing portion.

(8) The method of producing a long-fiber nonwoven fabric according to claim 1, wherein the airflow diverting device has a gap width of the long-fiber passage portion of 3 to 30 mm. apparatus.

(9) The apparatus for producing a long-fiber nonwoven fabric according to the above (1) or (8), wherein the airflow diverting device has a length of 5 to 10 times the gap width of the long-fiber passing portion.

(10) A spinneret, an airflow traction device for pulling a group of long fibers spun from the spinneret by an air current, changing the traveling direction of the group of long fibers ejected from the airflow traction device, and dispersing the group of long fibers. A long-fiber nonwoven fabric manufacturing apparatus in which a plurality of long-fiber spinning devices provided with an airflow diverting device for promoting the operation are arranged in series on a single conveyor for collecting and transporting long fibers ejected from the airflow diverting device.

(11) The airflow diverting grooves of the airflow diverting plate are provided in each of the first long fiber spinning device of the plurality of long fiber spinning devices and the airflow diverting device provided in each of the other long fiber spinning devices. To
11. The long-fiber nonwoven fabric manufacturing apparatus according to the above item 10, wherein the airflow diverting grooves are cut in diagonally opposite directions to the spinning direction.

(12) The spinneret according to any one of the above (1) or (10), wherein the spinneret is at least one kind of multi-component spinneret selected from a sheath-core type, a parallel type, a multi-split type, and a mixed fiber type. 2. The apparatus for producing a long-fiber nonwoven fabric according to claim 1.

(13) The airflow traction device according to any one of the above items (1) and (10), wherein the airflow traction device is a slot type air sucker.
Item.

(14) A thermoplastic resin is spun from a spinneret using the long-fiber nonwoven fabric manufacturing apparatus according to any one of the above items (1) to (13), and the spun long fibers are drawn by an airflow traction device. Then, while changing the ejection direction of the long fibers in the width direction by the airflow diverting device, the long fiber web is collected by the collecting device, and the collected web is heated and fused by the heating device. A method for producing a fibrous nonwoven fabric.

(15) The apparatus for producing a long-fiber nonwoven fabric according to any one of the above items (1) to (13), wherein the melting point difference is 10
The low-melting thermoplastic resin and high-melting thermoplastic resin having a temperature of at least ℃ are spun into filaments from at least one type of multi-component spinneret selected from a sheath-core type, a side-by-side type, a multi-split type, and a mixed fiber type. The drawn long fiber was pulled by an airflow pulling device, and while the jet direction of the long fiber was changed in the width direction by an airflow diverting device, the long fiber web was collected by a collecting device and collected by a heating device. A method for producing a multicomponent long-fiber nonwoven fabric by heating and fusing a web.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus for producing a long-fiber nonwoven fabric and a method for producing a long-fiber nonwoven fabric according to the present invention will be described with reference to the drawings. In addition, the arrangement state of each device and the like will be briefly described. 1 and 2, a long-fiber nonwoven fabric manufacturing apparatus (1) of the present invention comprises two melt extruders (not shown), a spinneret (2), The spinning device includes a traction device (3), an air flow diverting device (8), and the like. Further, a web collecting device (4) is provided below the spinning device, and a heat treatment device, in this example, a thermocompression device (5) is provided downstream in the traveling direction of the web (12).
Further, a winder for the nonwoven fabric (6) is provided in a subsequent step of the thermocompression bonding device (5). A cooling device (10) for cooling the spun yarn is provided at a position between the spinneret and the airflow traction device.

There are two melt extruders, which are arranged so that conjugate fibers can be spun. The spinneret (2) is rectangular and has a spinning hole on almost the entire surface. In addition, it has a configuration in which both regular fibers and composite fibers can be spun, and is provided in a mounting block (not shown). For conjugate fibers, for example, any of a sheath-core type spinneret, a parallel type spinneret, a multi-split type spinner, a mixed fiber type spinneret and the like can be used.

The cooling device (10) blows a low-temperature gas from one side thereof to cool the fiber (11). However, the cooling device may not be provided, and may be provided on both sides. The airflow traction device (3) has a width equal to or larger than the width of the spinneret, has a hole-shaped fiber passage which is narrow in the width direction and penetrates vertically, and is compressed from both sides in the longitudinal direction. The high-speed air that has passed through the air chamber is ejected downward. The long fiber group is pulled along the high-speed airflow as a blind, but there is no fluctuation in the running speed of the fiber,
The structure of the traction device has been scrutinized so that the fiber sway is minimized.

The air flow diverting device (8) is installed so as to sandwich the long fiber group injected like a cord in the front and rear direction, and the width thereof is substantially equal to or larger than the width of the traction device. There is an air flow diverting plate with an air flow diverting groove cut inside,
The direction of the high-speed airflow injected perpendicular to the conveyor surface from the traction device is changed, and at the same time, the long fibers existing in the airflow are dispersed.

The collecting device (4) is provided with a conveyor (9) for collecting the web (12) comprising a group of long fibers and conveying it to the next step. In addition, there is provided a suction device (7) for separating the high-speed gas and fluid ejected from the traction device and for reliably collecting the web on the conveyor. This suction device has a width substantially equal to the width of the collection device, and a blower for sucking an air current is connected to a side surface thereof. In addition, a net-like or lattice-like plate that can be finely adjusted to make the suction state of the conveyor surface uniform is provided on the upper part thereof.

The heat treatment device (5) is a device for melting and fixing the web (12) partially or entirely to the nonwoven fabric (6). The heat treatment device (5) includes a thermocompression bonding device including an embossing roll and a flat roll, a thermocompression bonding device including a flat roll and a flat roll, a device equipped with an ultrasonic oscillator, a heat through air type device, and the like. Can also be used. In this example, a thermocompression bonding device (5) including an embossing roll and a flat roll is provided. The nonwoven fabric winding device (not shown) is a device for winding the nonwoven fabric (6) by a predetermined length. Those in which the winding tension and the winding pressure can be adjusted and those in which the winding can be automatically changed are preferably used.

FIGS. 3 and 4 exemplify an apparatus in which two such spinning systems are arranged in series on one collection device. In this device, in the first spinning system and the second spinning system, the long fiber groups ejected from the airflow diverting device are arranged so as to be diverted in directions opposite to the spinning direction and ejected. . In the present invention, the types and fineness of the fibers spun in the first spinning series and the second spinning series may be the same or different. That is, when the first spinning series is any one of a regular fiber, a sheath-core composite fiber, a side-by-side composite fiber, a multi-split composite fiber, a mixed fiber composite fiber, and the like, the second spinning series is It may be the same as or different from the first spinning series. Further, the fineness of the first and second spinning series may be different, or a combination of fibers having different thermoplastic resin combinations may be used.

Next, the structure and operation of the air flow diverting device (8) provided in the device of the present invention will be described in more detail with reference to FIGS. Diagonally cut air flow diverting grooves (1
According to 4), the direction of the high-speed airflow injected perpendicularly to the conveyor surface from the airflow traction device is changed, and at the same time, the long fiber group existing in the airflow is dispersed, but the principle will be described below.

A group of long fibers (1) spun from the long spinneret (2) in the width direction and drawn and ejected by the airflow drawing device (3).
In 1), when viewed from the winder side, that is, from the front side, a substantially uniform fiber density is maintained from upstream to downstream while maintaining its width in a cord shape (FIGS. 2, 4). However, when viewed from the lateral direction, the long fiber group is forced to be focused along the narrow path of the airflow traction device (FIGS. 1, 3, 18,
19, 20), this convergence action deteriorates the formation of the nonwoven fabric and is a factor that causes spotting. That is, it is important how efficiently the fiber bundle is dispersed and collected as a web while maintaining the dispersion state.

The air flow diverting plate (16) used in the present invention has oblique air flow diverting grooves (1) as illustrated in FIGS.
4) are regularly cut in the width direction. further,
Such an airflow diverting plate (16) is installed in the airflow diverting device (8) immediately below the airflow traction device so as to sandwich the fiber group as viewed from the lateral direction (FIG. 18, FIG. 18). 19, 2
0). 18 and 19, the air flow diverting grooves (14) are arranged so as to be opposed to each other, and FIG. 20 has an air flow diverting groove (14) on one side and groove processing on the other side. It is an example of an airflow diverting device (8) having an airflow diverting plate that is not provided.
18 and 20 show an example in which the width of the gap (s) of the facing airflow diverting plate (16) is constant from upstream to downstream, and FIG. 19 shows an example in which the downstream is wide.

The flow of the high-speed airflow in the airflow diverting device (8) as viewed from the front side changes its direction from directly below to obliquely downward by the action of the airflow diverting groove (14). However, the air flow deflection angle is changed so that the portion close to the air flow deflection groove (14) changes its direction to an angle approximating the inclination angle (α) of the air flow deflection groove (1).
As the distance from 4) increases, it gradually approaches vertical. Further, the flow of the high-speed airflow in the airflow diverting device (8) viewed from the side surface is slower near the plate and faster at the center due to frictional resistance with the airflow diverting plate (16). The high-speed airflow that has exited the airflow diverting device (8) moves left and right in FIGS.
When viewed from the front, it diffuses to the near side and the far side. Therefore, the long fibers existing in the high-speed air flow also show the same flow, and are simultaneously dispersed in both the width direction and the flow direction with respect to the conveyor surface.

The local long fiber bundle will be described in more detail. When viewed from the front, the long fiber passing away from the grooved air flow diverting plate (16) changes its direction at a gentle angle. , Gradually changes its direction at a large angle as it approaches the air flow diverting plate (16). If you look at this from the side,
The long fibers passing through the central part flow almost vertically, and gradually turn outward at a large angle as approaching the air flow diverting plate. When viewed from above, the air flow diverting device (8)
The long fiber bundles which are partially dense at the entrance of the air flow spread in a cutting direction of the airflow diverting groove (14) so as to draw a parabola and reach the conveyor surface. That is, the long fiber bundle is dispersed so as to expand the foot three-dimensionally by the action of the groove and the wall surface of the airflow diverting plate. Further, since the airflow diverting grooves (14) are regularly cut in the width direction, the local dispersion state of the long fiber bundles occurs simultaneously in the entire area in the width direction, so that good formation and less spotting are observed. Can be web.

FIG. 21 shows the state of accumulation of one long fiber.
In the description, the length of the long fiber (F) changes gradually from the minimum lamination width (X1) to the width direction in the conveyor flow direction (M), and the maximum lamination width (X2) is mixed. I do. That is, since this web is composed of the laminated filaments of (X1) and (X2) and the filaments having gradually different lamination widths at intermediate positions between the laminated filaments, the produced nonwoven fabric has a difference in strength between the longitudinal direction and the lateral direction. Can be smaller.

The air flow diverting plate (1) used in the apparatus of the present invention
In 6), a large number of airflow diverting grooves (14) are cut off in the inner surface in a direction non-parallel to the spinning direction. It means that there is. The air flow diverting groove is cut at an inner angle α of 3 to 50 degrees between the spinning direction and the groove cutting direction, and the cutting direction is an air flow diverting plate (FIG. 5) from upper right to lower left, and the cutting direction is Both the upper left to lower right air flow diverting plates (FIG. 9) can be used. Further, both an air flow diverting plate in which a narrow groove is cut and formed (FIG. 5) and an air flow diverting plate in which a thick groove is cut and formed (FIG. 6) can be used. The narrow-groove type as shown in FIG. 5 is preferably used for spinning relatively fine fine fibers and relatively high-speed spinning. Also, the large-groove type as shown in FIG. 6 is preferably used for spinning relatively large fine-fiber long fibers or relatively low-speed spinning.

The shape of the air flow diverting groove (14) in the longitudinal direction when the air flow diverting plate (16) is viewed from a plane is not always limited to a constant shape, and the following modified types can be used. For example, an airflow diverting plate (FIG. 7) in which a groove having a narrow portion (15) in the middle of the longitudinal direction and a groove of a fixed width are mixed, or an airflow diverting plate in which a number of short grooves are cut in the same row ( FIG. 8) can be exemplified.

An air flow diverting plate (FIG. 10) in which narrow grooves and thick grooves are alternately cut, and an air flow diversion plate in which long and short grooves are alternately cut. A plate (FIG. 11) can also be exemplified. Further, even if the end of the groove is an airflow diverting plate (not shown) opened to the upstream side, the downstream side or both sides, or an airflow diverting plate (not shown) in which a curved groove is cut out. It does not matter if the function is satisfied. Incidentally, the inclination angle when the groove is curved indicates the angle between the orthogonal tangent to the center line of the circle and the spinning direction when the center curve of the groove is a circle. These deformation types have the effect of promoting the opening of the long fiber group by slightly oscillating or disturbing the high-speed airflow. Care must be taken to refocus.

The sectional shape of the airflow diverting groove (14) is not particularly limited. ^A-A shown in FIG. ^5, illustrating the direction of the cross-sectional shape of the groove in Figure 13-17. FIG. 13 is substantially U-shaped, FIG.
4 is a substantially concave type, and FIG. 15 is an air flow diverting plate (16) having a substantially V-shaped air flow diverting groove (14). FIG. 16 shows an airflow diverting plate (16) having airflow diverting grooves (14) in which substantially U-shaped and substantially W-shaped are mixed. FIG. 17 shows an airflow diverting plate (16) having an airflow diverting groove (14) in which grooves having different depths and widths are mixed. Thus, the airflow diverting plate (16) in which the airflow diverting grooves (14) having various cross-sectional shapes are cut can be used.

The depth (d) of the air flow diverting groove is 0.5 to 20 m.
m, more preferably 0.5 to
10 mm. When the depth is less than 0.5 mm, the effect of deflecting the airflow is small. If it exceeds 20 mm, the ejection pressure will be sharply reduced at the groove portion, and the inconvenience may occur that fibers are easily collected in the portion and the bundle of long fibers is easily mixed. In addition, fiber dust, other dust and the like accumulate on the bottom of the groove, and frequent cleaning is required. When the grooves having different groove depths (d, d1, d2, and d3) are mixed as shown in FIGS. 16 and 17, the deepest groove depth (d) is 0.5 to 20 m.
It is preferably within the range of m. For example, FIG. 16 shows an airflow diverting plate (16) in which substantially U-shaped grooves and substantially W-shaped grooves are mixed.
In this example, both the substantially U-shaped and substantially W-shaped groove depths are (d).

In particular, in the case of the substantially W-shaped groove, when a peak formed between the grooves and having a low height is (T), the depth (d) up to (T) is obtained.
There is a depth (d1) from 2) and (T) to the groove bottom, and d1 plus d2 is (d). FIG.
Is an airflow diverting plate (16) in which a deep groove (d) and a shallow groove (d3) are mixed. Both cases necessarily involve (d). However, other shallow grooves (d1, d2, d3)
Is preferably 0.5 mm or more.

The width (w) of the air flow diverting groove is 0.5 to 20 mm
Is preferably in the range, more preferably 4 to 15
mm. When the width (w) is less than 0.5 mm, the effect of deflecting the airflow is small, and it is necessary to cut a large number of grooves in one plate, resulting in high cost. On the other hand, if it exceeds 20 mm, the effect of the air flow may be uneven in the width direction, and the formation of the nonwoven fabric may be poor. In the case where grooves having different groove widths (w, w1, w2) are mixed as shown in FIGS. 16 and 17, it is preferable that all the groove widths are in the range of 0.5 to 20 mm. However, as shown in FIG. 16, the substantially W-shaped groove has two grooves with (T) interposed therebetween, and each of them is regarded as a single groove.

The pitch (p) of the air flow diverting groove is 1.5 to 30.
mm, more preferably 4 to 2 mm.
0 mm. If this pitch (p) is less than 1.5 mm, it is necessary to cut many narrow grooves in one plate,
Increases cost. On the other hand, if the pitch exceeds 30 mm, the flat portion between the adjacent grooves becomes large, and the effect of deflecting the airflow decreases. In addition, unevenness is likely to appear in the air flow diverting effect in the width direction, and the formation of the nonwoven fabric may be deteriorated. In the case where grooves (p1, p2) having different groove pitches coexist as shown in FIG.
Preferably, all groove pitches are in the range of 1.5 to 30 mm. Moreover, it is preferable that the pitch is constant and continuous in the width direction.

In the present invention, the volume of the air flow diverting groove (14) is 1 to 10 cm ^{2 on} the plane of the air flow diverting plate (16).
It is preferable in the range of 20 cm ^3, more preferably 1~15cm ^3. That is, a wide groove is cut in the case of a relatively shallow groove, and a slightly narrow groove may be formed in the case of a relatively deep groove.
It is better to set the groove pitch so that the flat portions of adjacent grooves do not become too large.

The installation state and the like of the air flow diverting device will be described mainly with reference to FIGS. 18, 19 and 20. Air flow diverting device (8) used in long fiber nonwoven fabric manufacturing device (1) of the present invention
Is an air flow diverting plate (16) having an air flow diverting groove (14) cut out.
At least one. In this device (8), the gap (s) of the fiber passage portion is formed by the facing air flow diverting plates. The device (8) includes a gap width adjusting device (20), and the gap width adjusting device (20) is provided.
May be a bolt type, an adjustment plate type, a hydraulic cylinder type, or the like. The device (8) may be closed at both ends in the width direction or may be open. The gap (s) is adjusted to be larger than the gap between the outlet slits of the upstream airflow traction device (3). This device (8) forms a space (k) downstream of the airflow traction device (3).

As shown in FIGS. 18 and 19, in the case of an air flow diverting plate in which air flow diverting grooves (14) are cut on both sides of the gap (s) of the fiber passage portion, the air flow diverting of the left member (18) is performed. Muko Groove (1
4) and the airflow diverting groove (14) of the right member (19) are arranged such that both grooves coincide with each other.

The width of the gap (s) in the fiber passage section is 3 to 30 mm
Is preferably in the range, more preferably 5 to 20 mm
It is. The relationship between the width of the gap (s) and the length (L) of the air flow diverting device (8) is preferably such that (L) is 5 to 15 times (s), more preferably 5 to 10 times. It is twice.
When (s) is less than 3 mm, the smooth flow of the long fiber group is hindered, and the long fiber group may be easily clogged in the gap (s). The direction effect is reduced, and the long fiber group may be laminated on the conveyor surface in an insufficiently spread state.

In the air flow diverting device (8) shown in FIG. 18, the gap (s) of the fiber passage portion has the same width at the upper portion and the lower portion.
In the airflow diverting device (8) shown in FIG. 19, the width of the gap (s) is different between the upper part and the lower part, and the upper part is small and the lower part is large. When the gap widths of the upper portion and the lower portion are different, it is preferable that the gap width of the upper portion be within the range of the present proposal. The width of the gap (s) can be arbitrarily adjusted by the gap width adjusting device (20) during operation or stop. For example, referring to FIG. 18, when manufacturing the nonwoven fabric under a certain condition, if the width of the gap (s) is increased, the local filament group opened from a top view has a parabolic spread when viewed from above. As the width of the fiber becomes wider and the local dispersion state of the long fiber group as viewed from the front becomes smaller, the deflection angle in the oblique direction becomes smaller.

Conversely, when the width of the gap (s) is reduced,
In the state where the local long fiber group is opened from the upper surface, the parabolic spread becomes narrower, and in the case where the local long fiber group is dispersed when viewed from the front side, the deflection angle in the oblique direction increases. That is, it is possible to arbitrarily adjust the dispersion state in the longitudinal direction and the lateral direction and the difference in strength while maintaining the fiber opening properties of the long fiber group.

The apparatus (1) for producing a long-fiber nonwoven fabric according to the present invention comprises:
It is sufficient if one airflow diverting device (8) as described above is provided, but two airflow diverting devices may be provided. For example, as shown in FIG. 18, downstream of the airflow diverting device (8) in which the width of the gap (s) is constant, the arrangement of the grooves is further different, and the width of the gap (s) is different in FIG. An air flow diverting device (8) similar to the above can be provided.

The long-fiber nonwoven fabric manufacturing apparatus (1) of the present invention comprises:
A device for adjusting the distance between the air flow diverting device (8) and the upper surface of the conveyor (9) can be provided. The dispersion and the spread state of the long fiber group vary depending on the type of the fiber to be spun and the type of the air flow diverting device (8), but also affect the distance from the air flow diverting device (8) to the conveyor (9) surface. For example, if the distance is too short, it is collected as a web without obtaining a sufficient spread, and if the distance is too long, the fibers are spread sufficiently and then the long fibers come together again. Easy to cause phenomena. Therefore, it is better to set the position at which the spread state is the best.

The apparatus (1) for producing a long-fiber nonwoven fabric according to the present invention comprises:
The long fiber group can be provided with a charging device for promoting electrostatic charging and a static eliminator for removing static electricity. The installation location of the charging device is preferably, for example, near the entrance or exit of the airflow traction device, inside the airflow diversion device or near the exit. The installation location of the static eliminator is preferably, for example, on the conveyor surface of the collector, near the entrance or exit of the heating device.

Next, an example of the production of a polyolefin-based long-fiber non-woven fabric using an apparatus for producing a long-fiber non-woven fabric will be described. In this production example, the physical properties and the like of the nonwoven fabric were measured by the methods described below.

(1) Nonwoven fabric strength and elongation: 5 cm × 15 c each so that the longitudinal direction of the test piece to be taken is the longitudinal (MD) and transverse (CD) directions of the nonwoven fabric, respectively.
5 test pieces each of which were collected at intervals of 10 cm,
Breaking strength (N / 5c) at a tensile speed of 10 cm / min
m) and elongation at break (%) were determined.

(2) Spotting Index of Nonwoven Fabric: Fifty samples of 5 cm × 5 cm in size are randomly cut out from a nonwoven fabric sheet with scissors. Each sample was weighed, and the basis weight (g / m ² ) was calculated. Spot weight index = (maximum weight-minimum weight) / average weight

Production Example 1 of Long-Fiber Nonwoven Fabric by the Production Method of the Present Invention A single spinning apparatus as shown in FIGS. 1 and 2 was used. This apparatus is composed of two extruders, a sheath-core type spinneret (2) having a hole diameter of 0.4 mm, 200 holes in a width of about 1 m, and 15 rows in the direction of flow of the conveyor, and an airflow traction device ( 3) Slot type air soccer, air flow diverting device (8), collection device (4) provided with net-shaped conveyor (9), thermocompression bonding device (5) composed of embossing roll and flat roll, and non-woven fabric winding It was a device mainly equipped with a picker. The sheath-core type spinneret (2), the slot type air sucker, the air flow diverting device (8) and the like were all one.

The air flow diverting device (8) is provided with a pair of air flow diverting plates (16) as shown in FIG. The cut-out airflow diverting groove (14) has an inner angle of 25 degrees and a width (w).
Is 6 mm, the pitch (p) is 9 mm, and the depth (d) is 6
mm in a sectional shape as shown in FIG. 13 of the substantially U-shaped, the volume of the grooves Atsuta at 3.6cm ³ / 10cm ^2. The left member and the right member were provided so that their grooves coincided with each other. The width of the interval (s) was 10 mm, and the length (L) of the airflow diverting device (8) was 100 mm. The thermocompression bonding device (5) was a device composed of an emboss roll and a flat roll having a total convex area of 11%.

From the first extruder, linear low-density polyethylene having a melting point of 121 ° C. is extruded into a sheath component, and from the second extruder, a propylene homopolymer (hereinafter, referred to as polypropylene) having a melting point of 162 ° C. is extruded to form a core component. From the spinneret (2), a sheath-core composite continuous fiber having a composite ratio of 50/50% by weight was spun. The spun long fiber group was pulled by a slot type air sucker, jetted while diverting and dispersing the airflow and the long fiber group by the airflow diverting device (8), and the web was collected by the collection device (4). The long fiber group had a single fiber fineness of 2.2 dtex. The spinning speed was 2730 m / min. The blown air was sucked from a suction device (7) provided in a collection device (4) to adhere the web to a conveyor (9). The web was transferred to a thermocompression bonding apparatus, and subjected to thermocompression treatment under the conditions of an emboss roll temperature of 118 ° C., a flat roll temperature of 113 ° C., and a linear pressure of 52 N / mm to form a nonwoven fabric, which was wound around a winder. This nonwoven fabric has a basis weight of 22 g / m ² , a basis spot index of 0.21, a longitudinal strength of 41.6 N / 5 cm, a longitudinal elongation of 58%, and a lateral strength of 20.3.
N / 5 cm, lateral elongation 71%. This nonwoven fabric had few spots and almost no bundle-like long fibers.

Manufacturing example of long-fiber nonwoven fabric by a manufacturing method other than the present invention 1 A slot type air sucker or the like as a spinneret (2) or an airflow traction device (3) without the airflow diverting device (8) was used. Using the same long-fiber nonwoven fabric manufacturing equipment as
A non-woven fabric was manufactured. The thermoplastic resin used, the production conditions, and the like were the same as those in Production Example 1. This non-woven fabric has a basis weight of 2
2 g / m ² , non-woven spot index 0.67, longitudinal strength 4
5.6N / 5cm, longitudinal elongation 51%, transverse strength 10.0N /
It was 5 cm and the transverse elongation was 59%. In this nonwoven fabric, even when visually judged, there were remarkable portions where the fibers were densely gathered and portions where the fibers were roughly gathered, and there were many eye spots. Bundles of long fibers were found everywhere.

Production example 2 of long-fiber nonwoven fabric by the production method of the present invention
An apparatus in which a first spinning system and a second spinning system as shown in FIGS. 3 and 4 were arranged in series on one collection device was used. This apparatus was a compound spinning type apparatus equipped with two extruders, each of which is a first spinning system on the back side and a second spinning system on the front side in FIG. However, as the spinneret (2), a sheath-core type having a hole diameter of 0.4 mm was used for the first spinning series, and a parallel type having a hole diameter of 0.4 mm was used for the second spinning series. The arrangement of the spinning holes was the same as in the above-mentioned production example. Also, an air flow diverting device provided in the first spinning line (8)
Has a pair of air flow diverting plates (16) as shown in FIG. The cut airflow diverting groove (14) has an inner angle of 28 degrees, a width (w) of 8 mm, and a pitch (p) of 12 m.
m, the depth (d) is a cross-sectional shape as shown in FIG. 13 of the substantially U-shaped in 5 mm, the volume of the grooves is 3.3 cm ³ / 10c
Atsuta in m ^2. The left member and the right member were provided so that their grooves coincided with each other, the width of the interval (s) was 8 mm, and the length (L) of the airflow diverting device (8) was 100 mm.

The air flow diverting device (8) provided in the second spinning system was provided with a pair of air flow diverting plates (16) as shown in FIG. The cut airflow diverting groove (14) has an inner angle of 25 degrees, a width (w) of 6 mm, and a pitch (p).
Is 9 mm, the depth (d) is 6 mm, the cross section is substantially U-shaped as shown in FIG. 13, and the volume of the groove is 3.6 cm ³ /
It was 10 cm ² . The left member and the right member are provided so that their grooves coincide with each other, and the width of the interval (s) is 10 mm,
The length (L) of the air flow diverter (8) was 100 mm. Otherwise, the same apparatus as in the above-mentioned production example was used.

A high-density polyethylene having a melting point of 133 ° C. is extruded from the first extruder provided in the first spinning series to form a sheath component, and the high-density polyethylene having a melting point of 1 ° C. is extruded from the second extruder provided in the first spinning series.
Polypropylene at 62 ° C. was extruded to form a core component, and a sheath-core composite continuous fiber having a composite ratio of 50/50% by weight was spun from a spinneret. The spun long fiber group is pulled by a slot type air soccer which is an airflow traction device (3), and the airflow and the long fiber group are deflected to the right side shown in FIG. And the first web was collected by the collection device (4). The long fiber group had a single fiber fineness of 2.0 decitex. The blown air was sucked from the first suction device (7) provided in the collection device (4), and the web was brought into close contact with the conveyor (9) and transferred to the next step. This first web had a basis weight of 15 g / m ² .

A linear low-density polyethylene having a melting point of 121 ° C. was extruded from the first extruder provided in the second spinning series as the first component, and a melting point of 136 was obtained from the second extruder provided in the second spinning series. A propylene-ethylene-butene-1 tertiary random copolymer mainly composed of propylene was extruded as a second component and a parallel composite continuous fiber having a composite ratio of 50/50% by weight was spun from a spinneret. The spun long fiber group is drawn by a slot type air soccer as an airflow traction device (3), and the airflow diverting device (8) turns the airflow and the long fiber group to the left side shown in FIG. 4 at 2777 m / min. And the second web was collected and layered on the first web sent by the conveyor (9). The blown air was sucked from the second suction device (7) provided in the collection device (4), and the laminated web was brought into close contact with the conveyor (9). This second long fiber group had a single fiber fineness of 1.8 dtex. The second web had a basis weight of 12.5 g / m ² .

The laminated web is heated at an embossing roll temperature of 116.
C., a flat roll temperature of 129.degree. C., and a linear pressure of 75 N / mm under a thermocompression treatment to form a laminated nonwoven fabric, which was wound around a winding machine. This laminated nonwoven fabric has a basis weight of 27.5 g / m ² , a basis weight index of 0.28, a longitudinal strength of 67.0 N / 5 cm, and a longitudinal elongation of 7.
0%, lateral strength 36.3N / 5cm, lateral elongation 81%. This nonwoven fabric had few spots and almost no bundle-like long fibers.

Example 2 of nonwoven fabric production by a method other than the present invention Neither the first spinning machine nor the second spinning machine was equipped with the airflow diverting device (8), and the other spinneret or airflow traction device (3) was used. A slot type air soccer or the like uses the same long-fiber nonwoven fabric manufacturing apparatus as in the nonwoven fabric manufacturing example 2 of the present invention,
A long-fiber laminated nonwoven fabric was manufactured. The thermoplastic resin used, production conditions, and the like were based on Production Example 2. The first web has a single fiber fineness of 2.1 dtex and a basis weight of 15 g / m.
I got 2. The second web had a single fiber fineness of 1.9 dtex and a basis weight of 14 g / m ² . The laminated nonwoven fabric has a basis weight of 27.5 g / m ² , a spotting index of 0.51, a longitudinal strength of 66.2 N / 5 cm, a longitudinal elongation of 61%, and a lateral strength of 17.6 N.
/ 5 cm and a lateral elongation of 70%. In this nonwoven fabric, the portion where the fibers were densely gathered and the portion where the fibers were roughly gathered were remarkable by visual judgment, and there were many eye spots. Bundles of long fibers were found everywhere.

Production example 3 of long-fiber nonwoven fabric by the production method of the present invention
A composite long-fiber nonwoven fabric was manufactured by a similar method using the same apparatus as in the long-fiber nonwoven fabric manufacturing example 1 according to the present invention. As the long fiber nonwoven fabric manufacturing apparatus, an apparatus having a single spinning system as shown in FIGS. 1 and 2 was used. However, the spinneret (2) has a hole diameter of 0.4.
mm eccentric sheath-core type was used. The arrangement of the spinning holes was the same as in the above production example. The air flow diverting device (8) was provided with a pair of air flow diverting plates (16) as shown in FIG. The cut-out airflow diverting groove (14) has an inner angle of 45 degrees, a width (w) of 11 mm, a pitch (p) of 15 mm, and a depth (d) of 4 mm, and is substantially U-shaped as shown in FIG. It is a cross-sectional shape as the volume of the grooves Atsuta at 2.9cm ³ / 10cm ^2.
The left member and the right member are provided such that their grooves match,
The width of the gap (s) was 10 mm, and the length (L) of the air flow diverting device (8) was 100 mm.

High-density polyethylene having a melting point of 132 ° C. is extruded from the first extruder into a sheath component, polypropylene having a melting point of 162 ° C. is extruded from the second extruder as a core component, and a composite ratio of 50/50 by weight is obtained from a spinneret. % Eccentric sheath-core type composite continuous fiber was spun. The spun long fiber group was pulled by a slot type air soccer, jetted while deflecting the airflow and the long fiber group by the airflow diverting device (8), and the web was collected by the collecting device (4). The long fiber group had a single yarn fineness of 3.1 dtex. The spinning speed was 1935 m / min.
The heat treatment condition of the nonwoven fabric is emboss roll temperature 128.
° C, a flat roll temperature of 130 ° C, and a linear pressure of 81 N / mm. This nonwoven fabric has a basis weight of 41 g / m ² , a spot weight index of 0.19, a longitudinal strength of 95.0 N / 5 cm, a longitudinal elongation of 93%,
The transverse strength was 56.4 N / 5 cm and the transverse elongation was 92%. This nonwoven fabric had few spots and almost no bundle-like long fibers.

Production Example 4 of Long-fiber Nonwoven Fabric According to the Production Method of the Present Invention The spinneret (2) used was a regular type having a hole diameter of 0.3 mm. The arrangement of the spinning holes was the same as in the above production example.
Other than that, a regular long-fiber nonwoven fabric was manufactured by a similar manufacturing method using substantially the same apparatus as that of the long-fiber nonwoven fabric manufacturing example 1 according to the present invention.

[0076] Polypropylene having a melting point of 163 ° C was extruded from the first extruder to spin regular long fibers. The spun long fiber group is pulled by a slot type air soccer, which is an airflow traction device (3), and is jetted while changing the airflow and the long fiber group by an airflow diverting device (8), and a collecting device (4). Web was collected. The long fiber group had a single yarn fineness of 1.7 decitex. The spinning speed was 3529 m / min. The heat treatment conditions for the non-woven fabric were an emboss roll temperature of 158 ° C., a flat roll temperature of 152 ° C., and a linear pressure of 71 N / mm.
This nonwoven fabric has a basis weight of 23 g / m ² , a basis weight index of 0.21,
Vertical strength 78.5N / 5cm, vertical elongation 39%, horizontal strength 4
It was 0.3 N / 5 cm and the lateral elongation was 53%. This nonwoven fabric had few spots and almost no bundle-like long fibers.

[0077]

The apparatus for producing a long-fiber nonwoven fabric according to the present invention does not require complicated various members, the whole apparatus is simple, the formation is good, there are few spots, and the strength difference between the vertical direction and the horizontal direction is small. A long-fiber nonwoven fabric that can be easily manufactured by simply changing the airflow diverting plate with a simple straight groove cut in the inner surface of the small nonwoven fabric or adjusting the gap width of the fiber passage part Manufacturing equipment. Further, the present invention is an apparatus for producing a long-fiber nonwoven fabric, in which long fibers are not partially caught during spinning or a fiber bundle is not generated. Further, the present invention is a long-fiber nonwoven fabric manufacturing apparatus that can be applied to the manufacture of wide-width nonwoven fabrics, and can manufacture any of regular long-fiber nonwoven fabrics and composite long-fiber nonwoven fabrics. Further, the nonwoven fabric having high uniformity as described above can be easily manufactured by using the apparatus.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a long-fiber nonwoven fabric manufacturing apparatus provided with one spinning apparatus.

FIG. 2 is a schematic perspective view of a long-fiber nonwoven fabric manufacturing apparatus provided with one spinning device.

FIG. 3 is a schematic side view of a long-fiber nonwoven fabric manufacturing apparatus provided with two spinning devices in series.

FIG. 4 is a schematic perspective view of a long-fiber nonwoven fabric manufacturing apparatus provided with two spinning devices in series.

FIG. 5 is an air flow diverting plate (narrow groove type).

FIG. 6 is an airflow diverting plate (thick groove type).

FIG. 7 is an airflow diverting plate (mixed type groove).

FIG. 8 shows an airflow diverting plate (a type in which a large number of grooves having a short major axis are arranged).

FIG. 9 is an air flow diverting plate (narrow groove type).

FIG. 10 is an air flow diverting plate (thick and narrow groove mixed type).

FIG. 11 shows an air flow diverting plate (a type in which grooves having a long major axis and grooves having a short major axis are alternately arranged).

FIG. 12 is a partially cutaway schematic perspective view of an airflow diverting plate.

FIG. 13 is a cross-sectional view taken along the line AA ′ of the airflow diverting plate (the airflow diverting groove is substantially U-shaped).

FIG. 14 is a cross-sectional view taken along the line AA ′ of the airflow diverting plate (the airflow diverting groove is substantially concave).

FIG. 15 is a cross-sectional view taken along the line AA ′ of the airflow diverting plate (the airflow diverting groove is substantially V-shaped).

FIG. 16 is a cross-sectional view taken along the line AA ′ of the airflow diverting plate (the airflow diverting grooves are substantially U-shaped and substantially W-shaped mixedly).

FIG. 17 is a cross-sectional view taken along line AA ′ of the airflow diverting plate (airflow diverting grooves having different depths and widths are mixed).

FIG. 18 is a schematic side view for explaining an arrangement state of the airflow diverting device (the gap width of the fiber passage portion is the same in the vertical direction).

FIG. 19 is a schematic side view for explaining an arrangement state of an airflow diverting device (a gap width of a fiber passage portion is different between upper and lower portions).

FIG. 20 is a schematic side view for explaining an arrangement state of the airflow diverting device (the airflow diverting groove is provided only on one side).

FIG. 21 is a schematic diagram for explaining a spread state of one long fiber on a collecting device.

[Explanation of symbols]

1: Nonwoven fabric manufacturing device. 2: Spinneret. 3: Airflow traction device. 4: Collection device. 5: Thermocompression bonding device. 6: Nonwoven fabric. 7:
Suction device. 8: Air flow diverting device. 9: Conveyor. 10: Cooling device. 11: fiber. 12: Web. 13: Valley of the air flow diversion groove. 14: Airflow diverting groove. 15: Narrow part. 16: Air flow diverting plate. 17: Mountain part of airflow diversion groove. 18: Left member. 1
9: Right member. 20: Gap adjusting device. AA ': sectional direction. d: groove depth. d1: Distance between valley and mountain T. d2:
Distance between mountain 17 and mountain T. d3: shallow groove depth. T:
A mountain with a low height. p: pitch of groove. p1: groove pitch.
p2: groove pitch. w: groove width. w1: width of groove. w2:
Groove width. k: Space between the airflow traction device and the airflow diversion device.
s: gap between fiber passages. L: Length of the air flow diverting device. α:
Inner angle of airflow diverting groove. X1: Minimum spread width of single yarn. X2:
Maximum spread of single yarn. M: moving direction of the web. F: Single yarn.

Claims (15)

[Claims] 1. A spinneret, an airflow traction device for pulling a group of long fibers spun from the spinneret by an air current, changing the traveling direction of the group of long fibers ejected from the airflow traction device, and dispersing the group of long fibers. An airflow diverting device for promoting the airflow diverting device, and a conveyor for collecting and transporting long fibers ejected from the airflow diverting device, the airflow diverting device having a widthwise length of the airflow traction device, and An apparatus for producing a long-fiber nonwoven fabric, comprising at least one airflow diverting plate having a large number of airflow diverting grooves cut in non-parallel to a fiber spinning direction on an inner surface. 2. The air flow diverting plate is provided with a gap (s) between the long fiber passage portions.
The long-fiber nonwoven fabric manufacturing apparatus according to claim 1, wherein a pair of airflow diverting grooves formed in each of the airflow diverting plates are provided so as to face each other. 3. An apparatus for producing a long-fiber nonwoven fabric according to claim 1, wherein the internal angle of the airflow diverting groove cut into the inner surface of the airflow diverting plate is 3 to 50 degrees. 4. The airflow diverting groove cut into the inner surface of the airflow diverting plate has a width (w) of 0.5 to 20 mm and a depth (d) of 0.5 to 20 mm.
The long-fiber nonwoven fabric manufacturing apparatus according to any one of claims 1 to 3, wherein the length is 20 mm and the pitch (p) is 1.5 to 30 mm. 5. A method according to claim 1 to 4 volumes of the inner surface to Kezu設by airflow deflection groove airflow deflection plate is 1 to 20 cm ^3/10 cm ²
The apparatus for producing a long-fiber nonwoven fabric according to any one of the above items. 6. The airflow diverting groove formed on the inner surface of the airflow diverting plate, wherein the airflow diverting grooves having different lengths are formed in the same row. Long-fiber nonwoven fabric manufacturing equipment. 7. An apparatus for producing a long-fiber nonwoven fabric according to claim 1, wherein the airflow diverting device comprises a gap width adjusting device for a long-fiber passing portion. 8. The air flow diverting device according to claim 7, wherein the gap width of the long fiber passage portion is 3 mm.
The apparatus for producing a long-fiber nonwoven fabric according to any one of claims 1 and 7, wherein the long-fiber nonwoven fabric manufacturing apparatus has a length of about 30 mm. 9. The long-fiber nonwoven fabric manufacturing apparatus according to claim 1, wherein the airflow diverting device has a length of 5 to 10 times the gap width of the long-fiber passage portion. 10. A spinneret, an airflow traction device for pulling a group of long fibers spun from the spinneret by an air current, a traveling direction of the group of long fibers ejected from the airflow traction device, and dispersion of the group of long fibers. A long-fiber spinning device with an airflow diverting device that promotes
A long-fiber nonwoven fabric manufacturing apparatus in which a plurality of long-fiber nonwoven fabrics are arranged in series on a single conveyor that collects and conveys long fibers ejected from the airflow diverting device. 11. The airflow diverting groove of the airflow diverting plate is provided for each of the airflow diverting devices provided in the first long fiber spinning device and the other long fiber spinning devices of the plurality of long fiber spinning devices. The apparatus for producing a long-fiber nonwoven fabric according to claim 10, wherein the airflow diverting groove is cut in a direction diagonally opposite to the spinning direction. 12. The spinneret according to claim 1, wherein the spinneret is at least one multi-component spinneret selected from a sheath-core type, a side-by-side type, a multi-segment type, and a mixed fiber type. Item. 13. The airflow traction device according to claim 13, wherein said airflow traction device is a slot type air sucker.
The long-fiber nonwoven fabric manufacturing apparatus according to any one of claims 1 and 10, wherein 14. A long-fiber nonwoven fabric manufacturing apparatus according to any one of claims 1 to 13, wherein a thermoplastic resin is spun from a spinneret, and the spun long fibers are drawn by an airflow traction device.
A long-fiber nonwoven fabric obtained by collecting a long-fiber web in a collecting device while heating and fusing the collected web with a heating device while changing a jet direction of the long fiber in a width direction by an airflow diverting device. Manufacturing method. 15. A long-fiber nonwoven fabric manufacturing apparatus according to any one of claims 1 to 13, wherein a low-melting thermoplastic resin having a melting point difference of 10 ° C. or more and a high-melting thermoplastic resin are sheath-core type,
Spin at least one type of multi-component spinneret selected from parallel type, multi-split type and mixed fiber type into long fiber, pull the spun long fiber by airflow traction device, and eject long fiber by airflow deflection device A method for producing a multicomponent long-fiber nonwoven fabric by collecting a long fiber web in a collection device while changing its direction in the width direction and heating and fusing the collected web with a heating device.