JPS62170570A - Method and apparatus for producing nonwoven web - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method and apparatus for producing a nonwoven web, typically made of synthetic fiber filaments.

More specifically, the present invention relates to a method and apparatus for forming a uniform nonwoven web by allowing a plurality of fiber groups ejected from a fiber supply device to overlap in the width direction of the garment without substantially interfering with each other. The method and apparatus for producing a nonwoven web of the present invention are those that are most suitable for producing a nonwoven web from long fiber filaments or short fiber staples.

[Prior Art] Conventionally, when a nonwoven web is formed by sucking, for example, filament I-vinegar and collecting it on a net conveyor using an air flow such as an ejector, a uniform nonwoven web is removed. Various techniques tj1 have been proposed.

In other words, there is a method of applying static electricity to a group of filaments and utilizing electrostatic aging to open the group of filaments.
As for the application of static electricity, methods such as those using corona discharge and those using frictional charging are considered. In addition, mechanical opening using collision force or a combination with frictional charging have also been proposed.

Alternatively, a method using a rectangular ejector has also been proposed.

However, according to studies conducted by the present inventors, no matter how many filaments are opened using electrostatic force or collision force, when forming a nonwoven web using multiple ejectors, adjacent ejectors etc. Groups of filaments ejected from (hereinafter referred to as adjacent plows) interfere with each other and become entangled, reducing the uniformity of the nonwoven web and causing uneven wear spots in the width direction of the nonwoven web. That is, so-called vertical stripe-like web irregularities occur in the length direction of the nonwoven web.

In order to solve these problems, there are methods of increasing the distance between adjacent spindles, alternately changing the positions of adjacent spindles and arranging them in a so-called zigzag pattern, or placing groups of filaments from adjacent spindles in contact between adjacent spindles. Methods of providing partition plates to prevent this from occurring, as well as techniques that combine these methods, have been considered or proposed.

However, even if the method of increasing the spacing between the blades causes the ejected filament group to swing in the width direction of the nonwoven web, the width that a single spindle can handle in the width direction becomes wider, and if there is a difference in spreadability between each filament group. On the contrary, hostile web irregularities are more likely to appear, and the number of spinning spindles (number of ejectors, etc.) per unit width is reduced, resulting in poor productivity. If the number of filaments per thread is increased in an attempt to compensate for this, the opening properties of the filament group will deteriorate, and on the contrary, the uniformity of the nonwoven web will deteriorate.

Further, when the spinning blocks (ejectors, etc.) are arranged in a staggered manner, they must be arranged in a staggered manner from the spinneret portion, which inevitably complicates the structure of the spinning block. Also, it may be possible to arrange only the fiber supply devices in a staggered manner, or it would be necessary to make the filament travel direction from the spinneret to the fiber supply device oblique to the vertical direction, or use a guide, which would result in poor spinnability. It has the disadvantage of being unstable. However, according to studies by the present inventors, this method generally improves the uniformity of the nonwoven web because filament groups from adjacent spindles overlap.

In addition, regarding the method of inserting a partition plate to block the influence of adjacent weights, in order to restrict the spread of the ejected filaments, the free spread of the ejected filaments is compressed, reducing the uniformity of the nonwoven web, and at the same time, the ejected air flow In order to control the spread in the width direction, the ejected airflow flows in the line direction (vertical direction) of the nonwoven web formation, so the ejected filaments are easily arranged in the line direction, and the non-woven web is formed vertically/'yo]. There will inevitably be problems such as the 1h sex ratio ('+='f sex difference) becoming large.

On the other hand, it has also been proposed to use a rectangular ejector to separate a group of filaments ejected in a sag-like manner in the exit direction (with two or more 1's in the width direction).

However, this method focuses only on increasing the freedom in the width direction, and the separated filament groups form a single layer nonwoven web without joining each other on the collecting surface. . It has also been proposed to separate filament groups ejected from one ejector, but this technical idea is the same as when using a rectangular ejector, and as in the present invention, adjacent filament groups are overlapped and overlapped. There is no technical idea to obtain a uniform nonwoven web due to the effect of .

1. Problems to be Solved by the Invention] The uniformity of nonwoven fabrics is generally inferior to that of woven fabrics, knitted fabrics, paper, etc., and as mentioned above, various proposals have been made regarding techniques for improving the uniformity. However, what is being done is inadequate/poor and has become an issue for the industry. In addition, the balance of characteristics (vertical/horizontal) is generally poor, and improvements are desired.

The present invention solves these conventional problems and produces a nonwoven web with improved uniformity and improved vertical/horizontal property ratio. The method and manufacturing apparatus 8 are intended to be provided.

Generally, when a nonwoven web is formed using a large number of fiber supply devices that use airflow, such as ejectors,
The fiber feeding devices are arranged in a row or in multiple rows in a direction perpendicular to the nonwoven web forming line (horizontal direction). In such an arrangement method, a nonwoven web forming method that uses a collision member at the exit portion of the fiber supply device is common in order to improve the defibration properties of the filaments etc. from the fiber supply device. In this method, the spread of the ejected filament group is generally larger than the spacing between adjacent filaments, interference occurs between adjacent filaments l-n, entanglement of the filament group occurs, and the uniformity of the nonwoven web deteriorates. - It is significantly lower than that of a nonwoven web obtained by jetting with a weight (reduction in uniformity due to multi-spindle interference). In addition, the spread of the ejected air flow to the left and right is also restricted and flows in the direction of the nonwoven web forming line, so that the vertical/horizontal characteristic ratio of the nonwoven web generally tends to become large.

The present invention solves the problems in the method of manufacturing a nonwoven web using such a collision member, and provides a method for manufacturing a uniform nonwoven web with a small difference in properties between vertical and horizontal directions, and a method for manufacturing a nonwoven web using a collision member. What you are trying to provide is required.

[Means for Solving the Problems] The method for manufacturing a nonwoven web of the present invention that achieves the above-mentioned object includes a fiber feeding device 1F using air flow arranged substantially in a line in the width direction of the nonwoven web. The fiber bundle ejected from the collides with a first-stage collision part (A) to change the jetting direction, and further collides with a second-stage collision part to open the fiber bundle,
[To Net 1] The fiber bundles are collected on a conveyor to form a nonwoven web, and the central axis direction of the fiber bundle jet from the first stage collision member is swung in the width direction of the nonwoven web. Further, the jetting angle of the fiber bundles from the second-stage collision member is made different for each adjacent fiber supply device, and the adjacent jetting fiber groups are overlapped with each other in the width direction of the nonwoven web to be supplemented on the net conveyor. A nonwoven web manufacturing method is characterized in that a nonwoven web is assembled to form a non-starved web, and the nonwoven web manufacturing apparatus of the present invention is characterized in that a plurality of fibers are supplied using an air flow that sucks and blows out fiber bundles. a first-stage member provided corresponding to the plurality of fiber supply devices and configured to change the jetting direction of the area'tL group jetted from the fiber supply devices;
Furthermore, why is it that the ejection angle of the fiber group ejected from the first stage collision member is different from the ejection angle of the fiber group ejected from the second stage collision member and the adjacent fiber supply device?
A device for making a non-woven fabric is characterized by comprising a net conveyor that collects the fiber bundles that are discharged.

[Effect 1 The present invention will be explained in more detail below.

In the present invention, a fiber bundle sucked and ejected by a fiber supply device using an air flow such as an ejector is caused to collide with a first-stage collision member to change the ejection direction, and then the fiber bundle is transferred to a second-stage collision member. When colliding with a collision member to spread the fibers and collecting them on a net conveyor to form a nonwoven web, the first
The central axis direction of the fiber bundle jet from the stage collision member is swung in the width direction of the nonwoven web, and the collision angle of the fiber bundle jet 9 to the second stage collision member is changed for each adjacent fiber supply device.
By changing the jetting direction of the A fiber group, the intended purpose is achieved.

That is, by swinging the direction of the central axis of fiber bundle jetting from the first-stage collision member, the spread of the fiber bundles in the width direction is increased, and the jetting direction of the fiber bundles from the second-stage collision member is changed between adjacent fiber bundles. By changing the structure, it is possible to eliminate collisions between adjacent fiber groups, greatly reduce the spread in the width direction of the nonwoven web obtained from one fiber feeding device without causing interference, and collect fiber groups from adjacent spindles. A nonwoven web is formed by spraying the particles so as to overlap each other in the width direction of the nonwoven web on the surface to produce an overlapping effect.

Therefore, since the interference between adjacent jet air flows is reduced, the jet fiber groups are more likely to be arranged in the horizontal direction, and the vertical/horizontal characteristic ratio is improved.

The fiber supply device in the present invention refers to a device that advances a fiber group using an air flow and jets the fiber group from a tip nozzle portion. Generally, what is called an ejector or aspirator is used to supply the fiber group, and the spun filaments from the spinneret are directly fed to the ejector.
It may be sucked and ejected, or it may be taken up by a high-speed take-up roller and then supplied to an ejector. These generally apply to the formation of nonwoven webs composed of filaments, but the same applies to the case where short fiber slivers are fed to an ejector or the like to form short fiber wear.

That is, the fiber bundle or fiber group in the present invention may be either a long fiber filament or a short fiber staple, or may be a mixture thereof. The nonwoven web may be a nonwoven web formed from filaments, so-called spunpond, or a staple fiber nonwoven web formed from staple fibers. In addition, the material of the fiber material is not particularly limited as long as it is made of fibers, such as polyester, polyamide,
Synthetic fibers such as polypropylene, polyethylene, or copolymers thereof, recycled rayon, cotton, wool, etc., natural fibers, and inorganic fibers such as glass fibers are used. Further, composite fibers or a combination thereof may be used.

Hereinafter, the functions and effects of the present invention will be explained in more detail with reference to the drawings, etc., but for convenience, the explanation will be centered on the case of the spunbond method in which filaments are formed.

FIG. 1 is a perspective view illustrating one embodiment of the method for producing a nonwoven web of the present invention, in which 1 is a group of filaments discharged from a spinneret or the like (not shown); The ferrules are arranged substantially in a line perpendicular to the direction of the nonwoven web forming line (indicated by the arrow). Note that the placement method does not necessarily have to be strictly in a straight line. If it is possible to arrange them somewhat forward and backward, it is possible to set a small difference in the ejection angle between the second-stage collision member and the adjacent spinneret, which will be described in detail, and this can be said to be preferable. 2 is a fiber supply device, and the figure shows an example of an ejector. 3
is a member constituting the ejector, and is a zone in which the filament is advanced. Usually, a pipe with a round cross section is used, but its cross-sectional shape is not particularly limited. In addition, before feeding the filament group 1 to the ejector 2, within the ejector, or after ejection, a fiber opening technique that utilizes electrostatic repulsion due to corona discharge or frictional charging, which is commonly employed in the production of filament nonwoven webs, is used. A4 is a first stage collision member, which is provided corresponding to each weight of the fiber supply device as described above. 5 is a flexible wire for swinging the first stage collision member 4, and 6 is a drive motor, which swings the first stage collision member 4 in a predetermined width by a stepping motor. In such a configuration, the first stage collision member 4 causes the filament groups ejected from the pipe 3 to collide and spread the filament groups by the collision force, and also opens the filament groups by frictional electrification caused by the collision. It attempts to break apart the filaments one by one as much as possible, and spreads the ejected filament group in the width direction, that is, from side to side, by swinging.

Although the opening effect differs depending on the material of the collision member 4 and the collision force, these conditions may be set appropriately according to the desired nonwoven web. The force of the collision becomes larger as the collision surface of the first stage collision part 4 and the axial direction of the pipe 3 (filament jetting direction) are closer to a right angle. There is no directionality in the ejecting direction of the filament group, making it difficult to collect it on the net 1 conveyor, and when the first stage collision member is oscillated, the ejected filament group does not follow the direction of the oscillation. There is a problem, usually at a certain angle (illustrated by θ in Figure 2)
As a result of various studies, the value of θ is 10' to 30.
It is preferably within the range of 0.

Further, the contact distance of the ejected filament group on the collision surface of the first stage collision member 4 is preferably 2Q mm or less. If this distance H becomes longer, the forward speed of the filament group will stall, the filament group will become more entangled, the uniformity of the nonwoven web will decrease, and the impact force on the second stage impact member will decrease, which is not preferable.

In addition, the first stage collision member is provided independently on each spindle, and is swung from side to side around the collision point of ficimen 1 to group 1, and has the effect of spreading the ejected filament group in the width direction. Eggplant. The first-stage collision member may have a curved collision surface or may be provided with a wall blocking the flow of air at the rear in order to stabilize the direction of ejection toward the second-stage collision member. Further, the swinging method is not limited to the method shown in the drawings, and a first stage collision member may be attached to the tip of the pipe 3 to cause the pipe 3 to rotate and reciprocate.

Next, 7 is a second stage collision member, and FIG. 1 shows a state in which it is provided independently for each spindle. Reference numeral 8 indicates a group of filaments ejected from the second-stage collision member 7, and reference numeral 9 schematically shows the deposition position of the group of filaments on the net conveyor. 10 is on the net conveyor.

Now, since the filament group ejected from the first stage collision member 4 has a small angle 1 angle θ, it is ejected in a state close to parallel to the surface of the net conveyor 10. It is difficult to collect the filaments, and even if it were possible, the ejected filaments would be collected in a state close to free fall, so they would be susceptible to disturbances (disturbances caused by air flows other than those ejected from the ejector). (A uniform nonwoven web is obtained.
stomach.

In addition, as a method to eliminate interference between adjacent weights, it is possible to change the angle θ between adjacent weights, but this is not preferable for the reasons mentioned above, and the ejected filaments tend to be aligned in the line direction, so the length of the nonwoven web is /Horizontal characteristic ratio increases. Therefore, by causing the filament group ejected from the first stage collision member 4 to collide with the second stage collision part 7, the jetting direction of the jetting linemen 1 to M is changed to the direction of the net conveyor 10.
Collected as a nonwoven web on 0. It goes without saying that the second-stage collision also has the same filament snoring and opening effect as in the first-stage collision. The spread of the ejected filament group in the width direction increases with each repetition of collision.

Here, if the set angle of the collision surface of the second stage collision member 7 and the filament ejection angle are set to be the same for each spindle, then
The spread of the filament 11"f- ejected from the pipe 3 increases as it moves away from the outlet, and since the first stage collision member 4 is swung from side to side, the ejected filament 11"f- spreads out in the width direction of the ejected line member]. The spread further increases, and the adjacent filament groups engage each other at the collision surface of the second stage collision section 147 or at a place where they leave the collision member.
This prevents the filaments 1 to 1 from interfering with each other and from spreading in the lateral direction, thereby causing the filaments 1 to M of adjacent spindles to become entangled with each other, thereby reducing the enclosing property of the filaments 11. In addition, if there is a difference in the degree of spread of the filament group between spindles, collision will occur at the center between the spindles, and the spindles with narrow spread will be biased, which will promote non-uniformity in the wear width direction. In addition, the ejected airflow interferes with adjacent weights and does not flow in the horizontal direction (width direction of the nonwoven web), but instead flows in the line direction (vertical direction), so the ejected filament is also accompanied by the line. As a result, there is a problem that the vertical/horizontal characteristic ratio becomes large.

Therefore, in the present invention, by changing the collision angle of the second stage collision member 7 between adjacent spindles, as schematically shown in FIG. The ejected filament group is collected at a position different from the trapping head of the spindle.

Next, regarding the size of the swing angle of the first stage collision member, in order to increase the overlap between the adjacent weights on the net conveyor surface, it is preferable that the swing angle is large. Followability and same phase (same position in line direction)
In order to avoid interference with the filament collecting position of the spindle, one is usually set so that it comes into contact with the filament collection position of the adjacent spindle.

The oscillating force direction may be independent for each spindle or may be in the same direction for all spindles. In general, the latter method is easier to control.

In the above description, the first stage collision member is oscillated in the width direction of the nonwoven web as a means for moving the central axis direction of the fiber bundle jet from the first stage face member in the width direction of the nonwoven web. Although the present invention has been explained by taking as an example a case where a method is adopted, the present invention is not necessarily limited to this method, and as another method, the first stage collision member white body may be of a fixed type with sufficient width. A method of swinging the fiber bundle injection center axis by a method of swinging the pipe 3, or a method of alternately applying jet air or suction air from the left and right to the fiber bundle near the first stage collision member, etc. May be adopted.

FIG. 2 is a schematic diagram seen from the side of FIG. 1, and necessarily shows the angular difference ψ between adjacent weights in the ejection angle from the second collision member. According to the knowledge of the present inventors, this angular difference is usually preferably within the range of 10' to 400. If this angular difference is increased, the interference with adjacent spindles can be reduced, but since the collision state greatly differs depending on the collision angle, a difference between the spinning spindles tends to occur in the spread of the filament group, which is not preferable. On the other hand, if the angle difference is made small, interference with adjacent weights tends to occur, which is undesirable.

FIG. 3 shows an embodiment of the song according to the present invention.
This figure corresponds to a view seen from above, and is necessary because the angle of ejection from the second stage collision member is alternately changed between adjacent weights. In adopting such an aspect, the filaments 1 to 9 on the net conveyor 10 are arranged in a so-called zigzag pattern in the width direction.

Figures 4 and 5 show an actual IN mode in which a second-stage collision part made of one member is used to make all the spindles have the same collision angle, and the jetting angles are close to each other in adjacent spindles. It is something. As shown in FIG. 5, the ejected filament collision angle 1 attenuation of the second-stage collision member 11 is the same for all spindles, and then the second-stage collision member 11, which is bent m in the middle, is The ejection angle is alternately changed between adjacent spindles from the middle of the member 11. In this method, since the collision angle in the second stage is necessarily the same for all spindles, it is possible to eliminate the difference between the spinning spindles due to the collision force. In this case, it is important to adjust the collision angle and the distance from the first stage collision member so that interference does not occur within the second stage collision surface. Although FIG. 4 shows a case in which one second-stage collision member 11 is used, an independent second-stage collision member may be used for each spindle.

Figure 6 shows a case where spindles are arranged in multiple rows in the line direction, and adjacent spindles in the same row have jetting angles that are close to each other, and the rows are also close to each other, so that the spindles are not woven. In the web body, an example of an embodiment is shown in which the difference in the ejection state of the filament groups is canceled out.

[Example] Hereinafter, the physical structure and effects of the present invention will be explained using Examples and Comparative Examples.

Example 1 Gold diameter φ100mm, cap spacing 200mm, number of cap holes 5
0 hole/Polyethylene deretarate from the 8-piece spinning block to the right of the nozzle at 1.5C per nozzle hole]/
It was discharged at a discharge amount of 10 minutes. The discharged filament was sucked into each of the spinning fibers by an ordinary ejector installed at a distance of 800 mm directly below the gold. As shown in FIG. 1, the ejectors are arranged in a horizontal line corresponding to the spinnerets. The suction filament is φ]○X1000
It is moved forward by a pipe of 1.0 mm and collides with the first stage collision member shown in 4 in Fig. 1, and the collision angle is θ=15°, I! f'
The contact distance between the ffi-emitting filaments 1 and 1 was set to 1 Qmm.

The first stage collision member 4 is powered by a stepping motor 6 at 3 cps.
The swing angle is 2 on one side with respect to the line direction.
00, and the rocking direction was the same for all spindles.

On the other hand, a second-stage collision member is installed at a distance of 1 Qmm from the end of the first-stage collision member, and the second-stage collision member is integrated with the piston shown in FIG. 5, and the ejection angle is alternately changed. The angle of the second stage was 3300 with respect to the pipe axis.

Then, the ejection angle was changed and set so that adjacent weights were placed 5mm forward (downstream) from the second stage impact point and alternated, one at 20° with respect to the impact surface and the others at Oo (impact angle Stray 1~), that is, the llp exit angle difference was 20°. The length of the second stage collision surface was approximately 10 cm at the contact distance of the 11r1 filament.

Using such an ejection method, the ejected filament group is collected on a net conveyor with a suction surface of 5 Qcm below the first stage protrusion, and is injected using the same method as ordinary spunbond iron. Oriweb is 1■.

The nonwoven web thus obtained had a weight of 60 g/m2, and its uniformity d3 and strength characteristic ratio (vertical/horizontal) were evaluated and found to be d3 in Table 1 below.

Table 1 shows that a sheet of CV value t, width of the nonwoven web x length of 100 cm is cut into small pieces of 5 x 5 cm, their weights are measured, and two-way variance analysis is performed to determine the width direction, length direction,
It is calculated separately into error terms.

The vertical/horizontal strength ratio is determined by sampling a 5x20cm test piece from the sheet, first measuring its ff1f4, determining the date (g/Tr12) of the sample piece, and then measuring the strength (kq15Cm) using a tensile tester. , intensity (kC
J15cn+/g7 m2) was determined and measured vertically and horizontally, and then the ratio of Polygonum/Yo] was determined.

Comparative Example 1.2 First Stage Collision Section Is it necessary that the second stage collision member 11 is the same as in the embodiment? ), the second stage collision part (5 mm below the collision point of the filament group of 49) is used.
Nonwoven webs were manufactured at two levels, including a case where a jetting angle of 20° was taken for 81 protrusions (Comparative Example 2).

(17) Characteristics of the nonwoven web obtained (as shown in Table 2 below, in Examples) I was considered inferior because I was a small person.

2 Table 1 Effects of the Invention] According to the present invention as described above, a nonwoven web with a simple structure that is uniform and excellent in terms of vertical and horizontal property ratios can be produced. I can do it - Shinoderu.

The effect of the present invention is that the fibers produced by interfering with the adjacent spinning hoops are produced by interfering with the fiber groups outputted from the fiber supply device arranged linearly in the direction (width direction) perpendicular to the direction of the non-woven fabric fabrication line. This method eliminates the entanglement of the fibers to obtain a uniform nonwoven web, and also reduces the vertical/horizontal characteristic ratio of the nonwoven web by spreading the airflow ejected from the fiber supply device in the width direction as much as possible.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an actual IM aspect of the present invention. FIG. 2 is a schematic view of FIG. 1 viewed from the side, and shows how the two collision members are arranged. 3 to 6 are for explaining other embodiments of the present invention. FIG. 3 is a view from above and schematically represents the wear collection position, and FIG. 4 is a view from the top. FIG. 5 is a perspective view showing an aspect other than that shown in the figure, and FIG. 5 is a schematic view of the one shown in FIG. 4, viewed from the side. FIG. 6 schematically shows an example of an embodiment in which spinning blocks are arranged in multiple rows, showing the deposition positions of filament groups from each spindle. 1: Filament group 2: Ejector 3: Pipe 4: First stage collision member 5: Flexible wire 6: Stepping motor 7: Second stage collision member 8: Ejection filament group 9: Filament group deposition position 10: Net conveyor 11: 2nd stage collision member

Claims (6)

[Claims] (1) The fiber bundles ejected from the air flow-based fiber supply devices arranged substantially in a line in the width direction of the nonwoven web are caused to collide with a first stage collision member to change the ejection direction, and further,
When colliding the fiber bundle with a second-stage collision member to spread the fiber bundle and collecting the fiber bundle on a net conveyor to form a nonwoven web, the fiber bundle is ejected from the first-stage collision member in the direction of the central axis. is swung in the width direction of the nonwoven web, and the jetting angles of the fiber bundles from the second stage collision member are made different for each adjacent fiber supply device, and the adjacent jetting fiber groups are oscillated in the width direction of the nonwoven web. A method for producing a nonwoven web, which comprises forming a nonwoven web by overlapping the net conveyor and collecting it on the net conveyor. (2) A patent characterized in that by swinging the first stage collision member in the width direction of the nonwoven web, the central axis direction of the fiber bundle jet from the first stage collision member is made to swing in the width direction of the nonwoven web. A method for producing a nonwoven web according to claim (1). (3) A method for manufacturing a nonwoven web according to claim (1) or (2), characterized in that the angles at which fiber bundles are ejected from adjacent second-stage collision members are alternated. . (4) Change the collision member angle from the middle of the second stage collision member,
Claims (1) and (2) characterized in that the ejection angle of the fiber bundle from the second stage collision member is changed.
A method for producing a nonwoven web according to item or item (3). (5) Fiber feeder rows in which the ejection angles of adjacent ejected fiber bundles are varied close to each other are arranged in multiple rows on a nonwoven web production line, and are also arranged so that the ejection angles are staggered in the line direction. A method for producing a nonwoven web according to claim 1, 2, 3, or 4. (6) A plurality of fiber supply devices that use airflow to suck and eject fiber bundles, and a device that is provided corresponding to the plurality of fiber supply devices and that changes the ejection direction of the fiber group ejected from the fiber supply devices. a first-stage collision member, further a second-stage collision member that jets the fiber groups jetted from the first-stage collision member at different jetting angles between the adjacent fiber supply devices; and the second-stage collision member. A nonwoven web manufacturing device comprising a net conveyor that collects fiber bundles ejected from a member.