JPH07150456A - Method for piling yarn and piling device therefor - Google Patents

Abstract

PURPOSE:To provide a method for piling yarn capable of surely piling two or more yarn layers at a given position without being influenced by elongation and contraction of an absorbable yarn layers caused by variability of rate of a processing machine and without phase difference and to provide a piling device for carrying out the piling method. CONSTITUTION:This method for piling yarn conducts a first and a second yarn feeding processes for supplying yarns, respectively, a first yarn suction process 31 for sucking the yarn supplied to the first yarn feeding process in a first yarn aggregate forming part to form a first yarn aggregate 2, a second yarn sucking process 33 for sucking the yarn supplied to the second yarn feeding process in a second yarn aggregate forming part to form a second yarn aggregate 3 and a yarn aggregate transfer process for transferring the second yarn aggregate to a given position of the first yarn aggregate by suction. A piling device for carrying out the piling method is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber stacking method and apparatus, and more particularly to a fiber stacking method and apparatus for manufacturing absorbent articles such as disposable diapers and sanitary napkins. .

[0002]

2. Description of the Related Art Generally, disposable diapers or sanitary napkins are provided with an absorbent fiber layer for absorbing excrement. As a method for producing the absorbent fiber layer, the absorbent fiber mixed and dispersed in an air stream is used as a raw material, and the absorbent fiber is separated from the air stream on a mesh (screen) having air permeability, The method of making fiber fine is common.

Further, recently, in order to improve its water absorption characteristics, a plurality of elements such as an absorptive gelling material are blended with the hydrophilic fiber material (fiber) in order to improve its water absorption characteristics. As such an absorbent fiber layer, it is particularly effective to laminate a fiber layer composed of only hydrophilic fibers and a fiber layer in which hydrophilic fibers and absorbent gelling material are substantially uniformly mixed. It is also known that it is better in terms of manufacturing cost to disperse the absorbent gelling material in a specific area where it is needed, instead of dispersing it in the entire absorbent fiber layer. Has been.

Therefore, in the production of an absorbent fiber layer containing a plurality of the above-mentioned elements, in addition to the above-described method, the following methods are used for laminating different fiber layers, and the absorbent gelling material. It has been proposed to perform the following and the like as a method of dispersing the above in a specific area of the absorbent fiber layer.

A stacking device for stacking two or more absorbent fiber layers each having a different composition is disposed on a conveyor or the like, and two or more absorbent fiber layers obtained are stacked. How to match.

The fiber stacking device on the side where the absorbent gelling material is mixed is a rotating drum or the like, and the fiber fiber stacking part and the non-fiber stacking part that does not allow air flow in the drum rotating direction are provided on the circumference of the rotating drum. A method of intermittently arranging at a pitch and intermittently superposing a fiber layer obtained by stacking fibers on the rotary drum on a hydrophilic fiber layer conveyed by a conveyor or the like (JP-A-63-5).
9465).

A method of intermittently spraying an absorbent gelling material on a hydrophilic fiber layer conveyed by a conveyor or the like by an intermittent operation of air such as a spray gun.

[0008]

However, in the above method and method, since the hydrophilic fiber layer is an elastic body having expansion and contraction properties, expansion and contraction occur during conveyance by the conveyor to maintain the dimension formed by the fiber stacking device. However, it is impossible to improve the overlay position accuracy. Further, there is a problem that the hydrophilic fiber layer expands and contracts due to fluctuations in the processing machine speed. For example, it is said that it is impossible to stack the same shape in the next stage on the fiber layer formed in the predetermined shape by the stacking device in the first stage without phase shift, or to accurately stack it in a specific area intermittently. There is inconvenience.

Further, in the above method, the accuracy of spraying to a specific area decreases as the speed of the apparatus increases due to the limitation of the intermittent operation range of air.

Therefore, an object of the present invention is to reliably superpose two or more fiber layers at a predetermined position without being affected by the expansion and contraction of the absorbent fiber layer due to the fluctuation of the processing machine speed and without any phase shift. It is an object of the present invention to provide a fiber stacking method and a fiber stacking apparatus for carrying out the fiber stacking method.

[0011]

The present invention comprises first and second fiber supplying steps for supplying fibers, respectively, and the above first method.
Is supplied in the first fiber assembling step of sucking the fibers supplied in the fiber supplying step into the first fiber assembly forming part to form the first fiber assembly, and the second fiber supplying step. A fiber suction step comprising a second fiber suction step of sucking the formed fibers into the second fiber assembly forming portion to form a second fiber assembly; and the second fiber assembly as described above. The above object is solved by providing a fiber stacking method, which comprises performing a fiber assembly transfer step of transferring and stacking the fiber assembly to a predetermined position by suction.

In addition, the present invention is, as a preferable fiber stacking apparatus for carrying out the fiber stacking method, a first rotating body and a first rotating body which is provided adjacent to the first rotating body. A second rotating body that rotates in synchronism with the first rotating body, a first fiber supplying section and a second fiber supplying section that respectively supply fibers to predetermined positions of the first rotating body and the second rotating body, A first suction section arranged inside the first rotating body, a second suction section arranged inside the second rotating body, and a second suction section arranged inside the first rotating body. A transfer suction section, and the first rotating body has a first fiber assembly forming section forming a first fiber assembly on a surface thereof, and the first suction section is provided. Is adapted to suck the fibers supplied from the first fiber supply section to the first fiber assembly forming section, and the second rotating body is The second fiber assembly forming portion that forms the second fiber assembly is formed on the surface, and the second suction portion has the second fiber assembly forming portion and the second fiber. The fibers supplied from the supply unit are sucked, and the transfer suction unit transfers the second fiber aggregate to a predetermined position of the first fiber aggregate and stacks the second fiber aggregate. The present invention provides a fiber stacking device characterized by the following.

[0013]

According to the fiber stacking method of the present invention, the fibers supplied in the first fiber supplying step are sucked into the first fiber assembly forming section and are placed at a predetermined position of the first fiber assembly. The fibers supplied in the second fiber supplying step are sucked into the second fiber assembly forming portion to transfer and stack the second fiber assemblies formed. Therefore, the second fiber assembly can be transferred to the first fiber assembly without carrying the first and second fiber assemblies through the carrying step. It is possible to stack the fiber aggregates without being affected by the change in dimension and shape due to expansion and contraction. further,
The phase at the time of transferring / stacking can be mechanically determined, and the transferring / stacking can be reliably performed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the fiber stacking method and the fiber stacking apparatus according to the present invention will be described below in detail with reference to the drawings. First, the fiber stacking apparatus of the present invention, which is a preferred apparatus for carrying out the fiber stacking method of the present invention, will be described.

FIG. 1 is a perspective view of a part of a fiber laying device for an absorbent article of a diaper as one embodiment of the fiber laying device of the present invention, and FIG. 2 is a perspective view of the first rotating body shown in FIG. FIG. 3 is an enlarged cutaway view of part 1 and FIG. 3 is an enlarged cutaway view of part of the second rotating body shown in FIG. 1.

A fiber stacking apparatus 1 of this embodiment shown in FIG.
Includes a first rotating body 10, a second rotating body 20 provided adjacent to the first rotating body 10 and rotating in synchronization with the first rotating body 10, and a first rotating body 20. A first fiber supply unit 31 and a second fiber supply unit 31 as a first fiber supply unit for supplying fibers to predetermined positions of the body 10 and the second rotating body 20, respectively.
A second fiber supply unit 33 as a fiber supply unit of
A first suction unit 40 as a first suction unit arranged inside the first rotating body 10 and a second suction unit as a second suction unit arranged inside the second rotating body 20. Unit 5
0, and a first transfer suction unit 70 as a transfer suction unit disposed inside the first rotating body 10. Then, the first rotating body 10 is the first fiber assembly 2
Has a first pocket 11 as a first fiber aggregate forming portion that forms the first fiber assembly forming portion, and the first suction unit 40 described above supplies the first fiber 11 to the first pocket 11 described above. The second rotary body 20 is configured to suck the fibers supplied from the unit 31, and the second rotary body 20 forms the second fiber aggregate 3 and the second pocket as the second fiber aggregate forming portion. 21 on the surface, the second suction unit 50 is configured to suck the fibers supplied from the second fiber supply unit 33 into the second pocket 21. First transfer suction unit 70
Is adapted to transfer the second fiber assembly 3 to a predetermined position of the first fiber assembly 2 and stack them.

More specifically, the first rotating body 10 will be described.
The second rotating body 20 and the second rotating body 20 are both hollow drums having the same size. The first rotating body 10 and the second rotating body 20
Although not shown in particular here, both are connected to a drive mechanism so that they are synchronized in the opposite direction (along arrow A and B) and rotate at the same speed.

The first pocket 11 is provided by continuously forming an overflowing hourglass-shaped recess on the peripheral surface of the first rotating body 10, and the second pocket 21 is It has a square shape, and a plurality of them are intermittently arranged at equal intervals on the peripheral surface (surface) of the second rotating body 20. Since the shapes of the first and second fiber aggregates 2 and 3 are determined by the shapes of the first and second pockets 11 and 21, the shapes of the first and second pockets 11 and 21 are By operating, the above-mentioned first and second fiber aggregates 2 and 3 having an arbitrary shape can be obtained.

The second pocket 21 is formed by connecting the second fiber assembly 3 to the first fiber when the first rotating body 10 and the second rotating body 20 rotate in synchronization with each other. The same intervals and the same number as the first pockets 11 are provided so that the specific areas 15 to be transferred to the aggregate 2 are in phase.

The first pocket 11 and the second pocket 21 will be further described with reference to FIGS. 2 and 3. As shown in FIG.
It is formed by disposing a screen cover 13 cut into a predetermined shape on a screen 12 attached on the entire surface of the first rotating body 10. Examples of the screen 12 include a wire mesh, a plastic mesh, and a screen with small holes. Further, the inner surface of the first pocket 11 has a vacuum hole 1 for sucking the first suction unit 40 toward the center of the rotating body (direction C).
Many 4 are provided. In addition, the second pocket 2
As shown in FIG. 3, reference numeral 1 denotes a screen 2 similar to the above-mentioned screen 12 provided on the entire surface of the circumference of the second rotating body 20.
2 has a screen cover 23 cut into a predetermined shape
It is formed by arranging. In addition, a large number of vacuum holes 24 are provided on the inner surface of the second pocket 21 for sucking the second suction unit 50 toward the center of the rotating body (D direction).

The first fiber supply unit 31 has a first
The first fiber stacking chamber 32 is provided so as to supply the fibers to the upper surface of the rotating body 10, and the second fiber supply unit 33 supplies the fibers to the upper surface of the second rotating body 20. The second stacking chamber 34 thus provided and the supply pipe 35 connected to the second stacking chamber 34. In addition, the first and second fiber supply units 3
1 and 33 are connected above the branching portion 36 to form an integral fiber supply port 37. The fibers disentangled from above the fiber supply port 37 are indicated by the arrow E.
Direction is supplied by air conveyance, and the pocket 11 is passed through the first stacking chamber 32 and the second stacking chamber 34.
Also, the fibers are piled in the pocket 21. In the second fiber supply unit 33, the absorbent gelling material is supplied from the supply pipe 35 in the arrow F direction,
Since the fibers in the second fiber stack chamber 34 and the absorbent gelling material are uniformly mixed, the composition of the fibers is different from that of the fibers supplied from the first fiber supply unit 31.

The first suction unit 40 includes a suction chamber 42, a connecting pipe 43, and a vacuum source (not shown) such as a vacuum pump connected to the suction chamber 42 via the connecting pipe 43. , The suction chamber 42 is
It is provided at a position facing the first fiber stack chamber 32, and has a large number of suction ports (not shown) on its surface on the rotor side so as to suck the fibers supplied from the first fiber stack chamber 32 into the pocket 11. No) is provided. The second suction unit 50 includes the suction chamber 52, the connecting pipe 53, and the suction chamber 5 via the connecting pipe 53.
A vacuum source (not shown) such as a vacuum pump connected to the suction chamber 52 is provided at a position facing the second fiber stack chamber 34, and is supplied from the second fiber stack chamber 34. A large number of suction ports (not shown) are provided on the surface on the rotor side so as to suck the fibers into the pocket 21.

In the suction chambers 42 and 52, the length of the suction chamber in the rotation direction of the first rotating body 10 and the second rotating body 20 is the same as that of the first pocket 11 and the second pocket 21. 1 rotating body 10 and second
It is preferable to have such a length as to have a plurality of lengths of the rotating body 20 in the rotation direction, for example, an integral multiple of the lengths of La and Lb shown in FIGS. 2 and 3, respectively.

Further, the first and second rotating bodies 10, 2
0 inside the first and second suction units 40,
A fiber assembly formed by the first pocket 11 and the second pocket 21 up to the inter-pocket transfer position 4 which is adjacent to 50 and is the contact point between the first rotary body 10 and the second rotary body 20. A first suction holding unit 61 and a second suction holding unit 64 for holding the body as it is
Are provided respectively. The first suction holding unit 61 includes a suction chamber 62, a connecting pipe 63, and a vacuum source (not shown) such as a vacuum pump connected to the suction chamber 62 via the connecting pipe 63. 62 designates the first fiber assembly 2 and the first pocket 1
A large number of suction ports (not shown) are provided on the surface of the rotor side so as to suck the sheet. The second suction holding unit 64 includes the suction chamber 65 and the connecting pipe 6.
6 and a vacuum source (not shown) such as a vacuum pump connected to the suction chamber 65 via the connection pipe 66,
The suction chamber 65 includes the second fiber assembly 3 and the second fiber assembly 3.
A large number of suction ports (not shown) are provided on the surface on the rotor side so as to suck into the pocket 21.

The first transfer suction unit 70 has the first suction holding unit 61 inside the first rotary member 10.
Is provided adjacent to, and from the inter-pocket transfer position 4 to a transfer conveyor transfer position 5 which is a contact point between the first rotating body 10 and a transfer conveyor described later. And the first
The transfer suction unit 70 includes a suction chamber 71, a connecting pipe 72, and the suction chamber 71 via the connecting pipe 72.
A vacuum source (not shown) such as a vacuum pump connected to the suction chamber 71, so that the suction chamber 71 sucks the second fiber assembly 3 into the specific area 15 of the first pocket 11.
A large number of suction ports (not shown) are provided on the surface of the rotor side.

Further, in the laminating apparatus 1 of the present embodiment, a conveyor 80 for conveying the laminated first and second fiber aggregates 2 and 3 to the next step is provided with the conveyer 80. Prepared below. The transfer conveyor 80 is the first
And a conveyor belt 81 that conveys the second fiber assemblies 2 and 3, and a conveyance suction unit 82 provided inside thereof.
And rolls 84, 85, 86 which drive the conveyor belt 81. Further, the transport / suction unit 82 includes a transport / suction chamber 87 provided from the transport conveyor transfer position 5 to immediately before the roll 84 in the flow direction of the transport conveyor 80, and a suction tube 88. The width of the transport / suction chamber 87 is the same as the width of the conveyor belt 81. The transport suction chamber 87 is provided with a large number of suction ports (not shown) on its surface on the side of the first rotating body 10 so as to suck the laminated web 6.

The first rotating body 10 and the transfer suction chamber 8
A mount for sequentially conveying the laminated web 6 obtained by laminating the first and second fiber aggregates 2 and 3 formed by the first and second pockets 11 and 21 between the sheet 7 and the sheet 7. 89
Is being supplied. The mount 89 is conveyed in the direction of the arrow G, supported by the conveyor belt 81, and interposed between the first rotating body 10 and the conveyance suction chamber 87 at the conveyance conveyor transfer position 5.

The first suction unit 40 and the second suction unit 5 vary depending on the quality and quantity of the fibers to be stacked.
0, the first suction holding unit 61, the second suction holding unit 64, and the first transfer suction unit 70, 100 to 10
It is preferable to apply a suction pressure of 00 mmAq and a suction pressure of 10 to 100 mmAq in the transport suction unit 82.

Next, an embodiment of the fiber laminating method of the present invention will be described with reference to an example using the apparatus shown in FIG. In the fiber stacking method of this embodiment, first and second fiber supplying steps for supplying fibers and the fibers supplied in the first fiber supplying step are sucked into the first pocket 11 described above. The fibers supplied in the first fiber suction step of forming the first fiber assembly 2 and the second fiber supply step are sucked into the second pockets 21 to obtain the second fiber assembly 3 A fiber suction step comprising a second fiber suction step for forming
The fiber assembly transfer step of transferring the fiber assembly 3 to a predetermined position of the first fiber assembly 2 by suction and stacking the fiber assembly 3 is stacked.

Each step will be described over time. First,
In the first and second fiber supply steps, the fiber supply port 3 is used.
7 to the first and second fiber supply units 31 and 33
In other words, the fibrillated fibers dispersed in the air are introduced in the direction of arrow E, and the fibers are supplied toward the peripheral surfaces of the rotating first rotating body 10 and second rotating body 20. To do.

At this time, a predetermined amount of the absorbent gelling material is supplied to the second rotary body 20 from the supply pipe 35 attached to the second fiber stack chamber 34, and the second fiber stack chamber 34 is supplied with the absorbent gelling material. It is uniformly mixed with the supplied fibers.

Next, the fiber suction process including the first and second fiber suction processes is performed. In the first suction step,
The fiber supplied toward the first rotating body 10 is sucked into the first pocket 11 by the first suction unit 40 from the inside of the first rotating body 10 to form the first fiber assembly 2. . In addition, in the second suction step, the mixture of the fiber supplied from the fiber supply port 37 and the absorbent gelling material is added to the second suction step.
Second suction unit 50 for sucking from inside the rotating body 20
Is sucked into the second pocket 21 to form a second fiber assembly 3 having a composition different from that of the first fiber assembly 2 (containing an absorbent gelling material).

Here, the first rotating body 10 and the second rotating body 20 rotate in the directions of arrows A and B, respectively.
Fibers in the pocket 11 of the second and second pocket 2
In 1, a mixture of fibers and absorbent gelling material is deposited. Further, the rotational peripheral velocities of the first rotary body 10 and the second rotary body 20 are the same, and at the positions where the first rotary body 10 and the second rotary body 20 are adjacent to each other (inter-pocket transfer position 4), The second pocket 21 is synchronized so as to be located in the specific area 15 in the first pocket 11.

The first and second fiber aggregates 2 and 3 are held in the pockets by the first suction holding unit 61 and the second suction holding unit 64 up to the inter-pocket transfer position 4, respectively.

Next, a fiber aggregate transfer step is performed. In the fiber aggregate transfer step, at the inter-pocket transfer position 4,
The second fiber assembly 3 formed in the second pocket 21 on the second rotating body 20 is released from the suction by the second suction holding unit 64, and at the same time by the suction of the first transfer suction unit 70. It is performed by transferring and stacking to the specific area 15. At this time, since only the fibers are stacked in the first pocket 11 in the first pocket 11 in the first pocket 11, the mixture of the fibers in the pocket 21 and the absorbent gelling material is the first rotary body. 10 will be placed on top of the fiber layer of the fibers only.

In the fiber aggregate transferring step, the second fiber aggregate 3 is transferred from the second pocket 21 directly to the specific area 15 of the first pocket 11, so that the shape of the second pocket 21 is impaired. And the arrangement in the specific area 15 can be ensured without any positional deviation such as phase deviation. Also,
Since such a fiber aggregate transfer step is performed, an additional device such as a spray gun for intermittent spraying of the absorbent gelling material is not required, and the spraying position accuracy by intermittent spraying and the intermittent operation tracking by increasing the speed of the fiber stacking device are not required. The consideration of becomes unnecessary.

Then, in this embodiment, the first pocket 11 sucking the second fiber assembly 3 reaches the transfer conveyor transfer position 5 below by the rotation of the first rotating body 10, and here, Then, the transfer and transfer step of transferring the laminated web 6 obtained by laminating the first and second fiber assemblies 2 and 3 onto the mount 89 is performed. That is, when the first pocket 11 reaches the transfer position 5 of the conveyor, the first transfer suction unit 7
The suction of 0 is cut off, and at the same time, the conveyance suction unit 82 sucks from the back side of the mount 89, and the laminated web 6 is transferred onto the mount 89.

By repeating the above operation,
It is possible to obtain, as the laminated web 6, an absorbent body in which a desired shape, weight and absorbent gelling material are distributed in predetermined areas on the mount 89.

Subsequently, the laminated web 6 is sent to the next step (not shown), cut into a predetermined length, and then sandwiched between the top sheet and the back sheet of the disposable diaper to manufacture the disposable diaper. .

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention. For example, the first pocket 1 on the first rotating body 10
The arrangement of 1 may be an intermittent arrangement like the pocket 21. In addition, the conveyance route of the mount 89 is changed from the roll 90 to the second.
It may be wound along the rotating direction of the rotating body 20, and may be passed between the first rotating body 10 and the second rotating body 20 and passed over the conveyor belt 81. The drum diameters of the first rotating body 10 and the second rotating body 20 may be different, and in this case, the drum peripheral speeds of both rotating bodies need to be equal. Furthermore, it is possible to arrange three or more rotary drums having pockets to achieve a desired absorber layer structure.

Further, although the example of the absorbent body of the diaper has been described in the present embodiment, the present invention can be applied to other articles such as sanitary napkins, absorbent pads for breast milk pads and industrial products. Is.

[0042]

EFFECTS OF THE INVENTION According to the fiber laminating method of the present invention, two or more fiber layers are placed at predetermined positions without being affected by the expansion and contraction of the absorbent fiber layer due to the fluctuation of the processing machine speed and without phase shift. You can surely overlap. Further, the fiber laminating apparatus of the present invention can easily and surely perform the above fiber laminating method.

[Brief description of drawings]

FIG. 1 is a perspective view showing a fiber stacking device for an absorbent core of a diaper as an embodiment of the fiber stacking device of the present invention.

FIG. 2 is a partially enlarged cutaway view of the first rotating body shown in FIG.

3 is a partially enlarged cutaway view of the second rotating body shown in FIG. 1. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fiber stacking apparatus 2 1st fiber assembly 3 2nd fiber assembly 10 1st rotary body 11 1st pocket 20 2nd rotary body 21 2nd pocket 31 1st fiber supply unit 33 2nd Fiber supply unit 40 first suction unit 50 second suction unit 61 first suction holding unit 64 second suction holding unit 70 first transfer suction unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location D04H 1/46 C 7199-3B

Claims (7)

[Claims] 1. A first and a second fiber supplying step for respectively supplying fibers, and a fiber supplied in the first fiber supplying step is sucked into a first fiber aggregate forming section to obtain a first fiber aggregate forming section. A first fiber suction step of forming a fiber assembly, and a second fiber assembly forming section by suctioning the fibers supplied in the second fiber supply step to a second fiber assembly forming portion. And a fiber assembly transfer step of transferring the second fiber assembly to a predetermined position of the first fiber assembly by suction and stacking the fiber assembly to the predetermined position of the first fiber assembly. A method for stacking fibers, which is characterized in that 2. A stacking device for carrying out the stacking method according to claim 1, wherein the stacking device is provided adjacent to the first rotating body,
A second rotating body that rotates in synchronization with the first rotating body, a first fiber supplying unit that supplies fibers to predetermined positions of the first rotating body and the second rotating body, and a second A fiber supply part, and a first suction part arranged inside the first rotating body,
A second suction part arranged inside the second rotating body and a transfer suction part arranged inside the first rotating body, wherein the first rotating body is The first fiber aggregate forming portion forming the fiber aggregate of No. 1 is provided on the surface, and the first suction portion is the first fiber aggregate forming portion. The fiber supplied from the supply unit is sucked, and the second rotating body has a second fiber aggregate forming unit that forms a second fiber aggregate on the surface, The second suction unit is configured to suck the fibers supplied from the second fiber supply unit to the second fiber assembly forming unit, and the transfer suction unit is configured to suck the fibers. 2 fiber aggregates to the above 1st
The fiber stacking device, wherein the fiber assembly is transferred to a predetermined position and laminated. 3. The fiber laminating apparatus according to claim 1, wherein the first rotating body and the second rotating body are drums. 4. The fiber stacking device according to claim 1, wherein the first rotating body and the second rotating body rotate in opposite directions, respectively. 5. The product of fibers according to claim 1, wherein the shape of the first fiber aggregate forming portion is different from the shape of the second fiber aggregate forming portion. Fiber device. 6. The at least one of the first fiber aggregate forming portion and the second fiber aggregate forming portion is arranged intermittently. Fiber stacking device. 7. The product of fibers according to claim 1, wherein the first fiber supply part and the second fiber supply part are adapted to supply fibers having different compositions. Fiber device.