Arrangement for arranging plurality of filaments in bundle and method thereof

Abstract

An arrangement (100) for arranging a plurality of filaments (103) conveyed by a conveying device (101) into at least two separate subsets of the filaments, the arrangement comprising at least one fluid flow providing device (108) for providing a fluid flow (109) towards at least a portion of the filaments (103) conveyed by the conveying device (101), thus, the path of the part of the filament is deflected in a second direction (110) different from the first direction (107) of the filament conveyed by the conveying device (101). Thus, the filament is separated into at least two filament subsets (103A, 103B) of the filament. The subset of filaments may then be arranged in at least two separate and advantageously individually reopenable bundles (113).

Description

Technical Field

[0001] The present invention relates to an arrangement structure and method for arranging a plurality of filaments, and in particular to an arrangement structure and method for arranging a plurality of filaments into bundles. Background Art

[0002] A system for providing filaments from a wet suspension is known, in which the suspension is fed through a plurality of nozzles to provide the filaments onto a surface in an input area of ​​a conveyor (such as a belt conveyor or a rotating drum). Typically, large systems include more than 3500 nozzles and therefore substantially as many filament strands on the surface of the conveyor. The conveyor serves both to transport the filaments from the input area to the output area and to heat and dry the filaments during transport, since the filaments received on the input area of ​​the conveyor are wet due to the wet suspension extruded through the nozzles.

[0003] When the filaments are heated, they are dried through an output area and then directed to further processes, such as to a winding device that winds the filaments into a continuous filament bundle, which is a precursor to yarn or string. The yarn or string is again used to make textiles.

[0004] The filament bundle of the output from the conveyor has some problems relevant to the further process, that is, when it is wound, the continuous filament bundle of winding can no longer be opened into the bundle of smaller size, because the filaments are entangled with each other in the bundle. In addition, depending on the number of nozzles, the continuous filament bundle of winding comprises approximately 3500 filaments or even more, which is too large for many any additional further processes (such as for making yarn). As an example, the yarn for the finest textiles has less than 100 filaments in the yarn, and the yarn count is less than 5g / 10km or even less than 2g / 10km or even less. Therefore, the bundle must have been broken smaller, and again needs many intermediate stages to realize the bundle of desired size. This naturally increases the time and energy consumption of obtaining the bundle of desired size, and makes the whole system complicated. Summary of the Invention

[0005] The object of the present invention is to alleviate and eliminate the problems associated with the known prior art. In particular, the object of the present invention is to provide an arrangement and method for arranging a plurality of filaments such that the bundle obtained from the arranged filaments will be of a desired size (e.g. in terms of yarn count) and such that manipulation of the bundle to achieve the desired yarn count for the bundle will no longer be necessary.

[0006] The objects of the invention are achieved by the features of the independent claims.

[0007] The present invention relates to an arrangement structure for arranging a plurality of filaments according to claim 1. Furthermore, the present invention relates to a method for arranging a plurality of filaments according to claim 16.

[0008] According to one embodiment of the present invention, a layout structure for arranging multiple filaments includes a conveyor for receiving the filaments from multiple outputs (such as nozzles) to the surface of the conveyor in the input area. The system typically includes more than 3000, advantageously more than 3500 material outputs or nozzles to provide substantially the same number of filaments on the surface of the conveyor, and therefore substantially the same number of filament lines. It should be noted that the number of nozzles is not limited to these numbers, but can also advantageously include a larger number of nozzles and therefore include a larger number of filament lines. The filament line is the path that the filament is traveling from the input area at least at the beginning or only in the first direction.

[0009] Conveyor is transferred filament from input area to output area in a first direction, and is transferred to further process again, such as folding or the winding process that described filament is carried out by winding device.According to one embodiment of the present invention, this arrangement structure comprises at least one fluid stream providing device, and it is used for providing fluid stream towards at least a portion of the filament transmitted by conveyor.Then, fluid stream makes the path of this part of filament deflect (or at least have a vertical component) in the second direction that is different from or perpendicular to the first direction, thereby this part is separated into subset from the rest of the filament of transmission.In this way, this arrangement structure is configured to provide at least two subsets.Then, these two subsets can be manipulated or be arranged into two independent continuous filament bundles, for the further process of filament.

[0010] Here, a continuous filament is understood to mean a filament that is at least the length of the conveyor between the input and output areas, but can naturally also be much longer. In theory, the length of the continuous filament can depend on whether there is sufficient material from the material output to the input area of ​​the conveyor, how long the conveyor is conveying the filament, and what the further course of the filament is.

[0011] Naturally, the arrangement may comprise a plurality of fluid flow providing means for providing a plurality of fluid flows and therefore a plurality of subsets of filaments. According to an advantageous embodiment, the fluid flow providing means are arranged sequentially in a first direction so that they do not interfere with each other's fluid flows and therefore do not interfere with the separation of the filaments into subsets. The fluid flow providing means are configured to arrange the plurality of parts of the filaments into a plurality of subsets so that a subset has at most a certain number of filaments, thereby achieving a bundle having at most a certain number of filaments. According to an advantageous embodiment of the invention, even if there are more than 3000+ material outputs or nozzles providing 3000+ filaments, subsets and bundles having less than 300 filaments, more advantageously less than 200 filaments and most advantageously at most 150 or 100 filaments can be achieved.

[0012] It is very advantageous to use fluid flow to arrange filaments into a separate subset, i.e., do not need any mechanical deflectors or separators, which typically cause interference, such as making thin and light filaments entangled on a mechanical structure. Fluid flow does not have this shortcoming. In addition, the fluid flow can be accurately controlled, such as the angle of attack or the speed of the fluid flow, so that the separation efficiency of the filaments is controlled to be separated into a separate subset. In addition, the fluid flow can also very accurately and in a desired manner control the path of the filaments, such as compared with a mechanical deflector, so that the fluid flow impacts the filaments so that the filaments tend to continue their path in the direction induced by the fluid flow. It has been noted that, in the absence of fluid flow control according to the present invention, tiny and very light filaments can easily float to the air flow around the device and float in this air flow, i.e., for example, due to the moving conveyor and the temperature difference, there is almost always a certain air flow.

[0013] In addition, the present invention provides the obvious advantage that bundles can be realized from continuous filaments and the yarn count of the bundle is at a desired fine level (e.g., 5g / 10km, 2g / 10km, etc.), so that the bundle itself can be used directly for example to make yarn and does not require many intermediate measures (such as sewing the fibers or filaments of the bundle). In addition, it should be noted that the individual bundles can be different sizes and the fluid flow providing device can be arranged so that the number of filaments in different subsets is different, and therefore the yarn counts of different bundles also deviate from each other. According to the present invention, this can be accomplished, for example, by controlling the output of the fluid flow providing device, such as closing a part of the output of a specific fluid flow providing device. Advantageously, the fluid flow providing device can include, for example, a suitable valve or the like for opening and closing a certain part of its output, or opening and closing can also be achieved manually.

[0014] However, it should be understood that the material output can output filaments having different characteristics (such as thickness, absorption or chemical composition or post-treatment agent) to the input area of ​​the conveyor device, and the fluid flow providing device 108 can then be used to separate those filaments having different characteristics to separate the filament subsets accordingly. Similarly, the separate filament subsets of filaments having different characteristics can then be collected and guided to provide them again to separate bundles, so that each bundle can include a filament subset having a specific characteristic.

[0015] In addition, the arrangement can also include a collecting device for collecting each filament subset in the filament subset and guiding it to a separate bundle. The bundle is again guided from the collecting device to further processing, such as to a winding device. The number of filament subsets, collecting devices and the number of bundles at the same time depends on the needs, so for example, a finer quality or a smaller number of filaments or a smaller yarn count is desired in a yarn, and a larger number of filament subsets, collecting devices and bundles are needed. The collecting device can additionally include a pressure-operating device, which is used to reduce the pressure in the collecting device and thereby cause a suction effect to each individual filament subset in the individual filament subset from the output area after the fluid flow providing device. The pressure-operating device is advantageously an ejector. Thus, the filament subsets separated by the fluid flow providing device can be effectively collected from the surface of the conveying device to the input of the collecting device, and in addition accelerate the transmission speed of the filaments or bundles through the collecting device.

[0016] The present invention provides significant advantages, such as accurate, effective and non-contact way to arrange filaments, so that for example entanglement of filaments with structures or mechanical deflectors or filaments floating in an uncontrolled manner can be avoided or at least reduced to a minimum. In addition, the present invention allows the filaments to be arranged into subsets of filaments of desired size and again arranged into bundles of desired size, which has the advantages already disclosed elsewhere in this document. Advantageously, the bundle is a separate and individually openable bundle that can be used directly in further processes (such as winding or folding processes) or even directly in the manufacture of yarn with suitable and desired yarn count, without the need for any additional intermediate measures (such as, for example, stabilization). In addition, the adjustment of the arrangement structure of the present invention is easy when the fluid flow providing device and its output can be easily adjusted or controlled, as described herein.

[0017] The exemplary embodiments presented herein should not be interpreted as limiting the applicability of the appended claims. The verb "to comprise" is used herein as an open limitation that does not exclude the presence of features that have not yet been enumerated. Unless explicitly stated otherwise, the features described in the dependent claims may be freely combined with each other.

[0018] The novel features which are believed to be characteristic of the invention are set forth with particularity in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with further objects and advantages thereof, will be best understood from the following description of specific illustrative embodiments when read in connection with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the following, the invention will be described in more detail with reference to exemplary embodiments according to the accompanying drawings, in which:

[0020] Figure 1 shows a side view of an exemplary arrangement for arranging a plurality of filaments into subsets and individually re-openable bundles according to an advantageous embodiment of the present invention,

[0021] Figure 2 shows a top view of an exemplary arrangement for arranging a plurality of filaments into subsets and individually reopenable bundles according to an advantageous embodiment of the present invention,

[0022] Figure 3 An example of a fluid flow providing device according to an advantageous embodiment of the present invention is shown, and

[0023] Figure 4 A top view of an exemplary arrangement having a plurality of fluid flow providing devices for arranging a plurality of filaments into subsets and individually reopenable bundles according to an advantageous embodiment of the present invention is shown. DETAILED DESCRIPTION

[0024] Figure 1 shows a side view of an exemplary arrangement 100 for arranging a plurality of filaments 103 into subsets 103A, 103B and again into individual bundles 113 according to an advantageous embodiment of the present invention, and Figure 2 A top view of this exemplary arrangement is shown. The bundles are advantageously individually (independently of each other) re-openable, and the bundles can be re-opened to substantially the size at which they were wound. Thus, for example, the re-openable and re-opened bundle also comprises the same number of continuous filaments as the bundle provided by the guide device, and thus the wound bundle. The arrangement comprises a conveyor 101 for receiving filaments 103 from a plurality of outputs 105 (such as nozzles) to a surface of the conveyor 101 in an input area 104. The conveyor 101 shown in the figures is a belt conveyor type device, but other types of conveyors, such as, for example, rotating cylinders, may also be used.

[0025] The conveying device 101 conveys the filaments from the input region 104 to the output region 106 in a first direction 107. The arrangement 100 further comprises one or more fluid flow providing devices 108 for providing a fluid flow 109 towards at least a portion of the filaments 103 on the surface of the conveying device 101. The fluid flow providing devices 108 are advantageously arranged between the input region 104 and the output region 106.

[0026] The angle of attack of the fluid stream 109 towards the filament 103 may be adjustable, but is advantageously arranged such that the fluid stream 109 deflects the path of the filament in a second direction 110 perpendicular to the first direction 107. In this way, this portion of the filament 103 is separated into a subset 103B and the remainder of the filament 103 is left to another subset 103A, thereby providing at least two subsets and again providing two separate bundles 113 of continuous filaments for further processing of the filament. Figure 2 An example with one fluid flow providing device 108 is shown, but for example Figure 4 , an example with six fluid flow providing devices 108 is shown, wherein the arrangement also provides six subsets 103A to 103F. Figure 4 As shown, the fluid flow providing devices 108 are arranged sequentially in a first direction 107 .

[0027] The arrangement can also include a collecting device 111 for collecting and guiding each filament subset in filament subsets 103A to 103F to a separate bundle 113. Bundle 113 is again guided to the winding device 102 from the collecting device 111. It should be noted that the winding device 102 is optional and winding is only an example of the further process of the bundle, and the winding device 102 can, for example, be replaced by a folding machine (not shown in the accompanying drawings). The collecting device 111 can also include a pressure-operating device 112, which is used to reduce the pressure in the collecting device 111, and thus after the fluid flow providing device 108, each separate filament subset in the separate filament subset 103A to 103F is caused to have a suction effect respectively from the output area 106. According to an example, the pressure-operating device 112 can be controllable independently of each other, thereby providing different and unequal suction effects separately for each separate filament subset in the separate filament subset.

[0028] The arrangement may also comprise one winding device 102 common to all collecting devices 111 and bundles 113 or separate winding devices 102 for at least one collecting device 111 and bundle 113. If separate winding devices 102 are used, the winding devices 102 may be controlled independently, such that, for example, the separate bundles 113 are wound at different rotational speeds of the winding device 102, so that, if desired, for example, different tensions for different bundles 113 may be achieved.

[0029] Figure 3 An example of a fluid flow providing device 108 is shown in FIG. The fluid flow providing device may include a pipe having an input 118 for receiving a fluid flow 117, one or more outputs 115, and an internal fluid conduit from the input 118 to the output 114. The output 114 can be provided, for example, by a capillary extending from the pipe and / or by a capillary hole extending from the pipe and through the pipe wall to the outer surface of the pipe. As an example, the outputs can be arranged along the pipe, for example, every 1 cm to 5 cm, advantageously every approximately 2 cm. The pipe can have, for example, relatively thick walls (compared to the diameter of the hole), so that the holes can be manufactured so that they have, for example, a precise focusing effect. In addition, the hole or capillary (or its longitudinal axis 119) can be arranged at a certain angle 115 relative to the longitudinal axis 120 of the pipe, such as 15° to 45°. However, it should be noted that the angle of attack is independent of the angle of the capillary or hole relative to the longitudinal axis of the pipe and is determined by the position of the fluid flow providing device relative to the conveying device and the conveyed filament.

[0030] The output 114 of the fluid flow providing device 108 can have an inner diameter of 0.5 mm to 5 mm, advantageously 0.8 mm to 2 mm, and most advantageously 0.8 mm to 1.0 mm. This provides a significant advantage in that when the inner diameter is within the above range, the focus of the high-speed fluid flow is very accurate, and the speed of the high-speed fluid flow can be maintained very high. Furthermore, when the inner diameter is within the above range, the diameter of the high-speed fluid flow is also small compared to the operating scale, and therefore very accurate and specific path control can be performed. Furthermore, when the diameter of the high-speed fluid flow is small, the volume flow rate of the fluid used for the high-speed fluid flow, and therefore the consumption, can be kept at a very low level, and the rapid high-speed fluid flow will not disturb the environment of the material, and the path of the material will be under control. Therefore, the entire system is very efficient, yet energy-saving.

[0031] However, when the volume flow rate is relatively low, the momentum of the high-speed fluid flow is also relatively low, so the speed of the high-speed fluid flow decreases rapidly, and the speed of the high-speed fluid flow is again less than the speed of the filament at a distance of 10 cm, more preferably 20 cm, and most preferably 50 cm from the output of the fluid flow providing device. Here, the speed of the filament is the speed caused by the moving conveying device, which also conveys the filament.

[0032] It should be noted that according to the present invention, the volume flow rate and therefore also the momentum of the high-speed fluid flow can be controlled, for example, by controlling the velocity or density of the high-speed fluid flow.

[0033] Output can be realized only by uniform capillaries or holes with substantially constant diameter, or output can have variable internal diameter. Output can also be realized, for example, by the structure of nozzle type (such as compressed air nozzle). Nozzle can comprise, for example, a tapered internal structure so that the internal diameter of nozzle narrows towards the flow direction. Therefore, nozzle can, for example, be used to more accurately control the direction and / or speed of fluid flow. In addition, the direction of output can be controllable (for example, manually), or output can be provided by a microcontroller so as to change direction.

[0034] Furthermore, the arrangement can include outputs with different diameters. According to one example, the output with the smaller diameter is arranged downstream in the direction of travel of the conveyor, and the output with the larger diameter is arranged upstream in the direction of travel of the conveyor. This provides greater variability in the path of the filament, especially upstream, and more accurate control downstream, but the system can naturally be arranged in the opposite manner if desired. Furthermore, if desired, the smaller diameter in the downstream section can lead to an increased velocity gradient in the direction of travel and, therefore, for example, a stretching effect on the filament.

[0035] Furthermore, according to one embodiment, the high-speed fluid stream can also be used as a carrier fluid for additives, such as ions, plasma, additives, dyes, and / or functional additives or other additives. This provides the additional advantage that the material can be manipulated in a controlled manner by the additive, but at the same time the additive can be directed in a controlled manner to the same location as the material (such as a filament) being delivered.

[0036] According to an example, the speed of high-speed fluid flow is configured to be higher than the speed of conveying material on the first direction 107 by conveying device.In this example, the velocity gradient of high-speed fluid flow is configured to cause the force that filament is dragged towards the maximum value of described velocity gradient, and changes the path of filament in a desired manner thus.Therefore, can realize very accurate control to the path of filament, and therefore realize the arrangement of filament.In addition, the velocity gradient of high-speed fluid flow can also cause material (such as filament) to be closer to each other or to compress towards the maximum value of the velocity gradient of high-speed fluid flow, and this may be a desired phenomenon in some applications.

[0037] As disclosed elsewhere in this document, this arrangement can include a plurality of fluid streams providing devices, and in addition, the fluid stream providing device can also include one or more outputs, to provide and focus on a plurality of high-speed fluid streams towards a part for filament or filament. In addition, according to an example, the initial velocity of the high-speed fluid stream at the output of the fluid stream providing device or the impact velocity of the high-speed fluid impact filament are advantageously at least twice, advantageously 3 to 5 times, even most advantageously more than 5 times of the filament delivery speed. According to an example, the flow velocity of the fluid stream provided by the fluid stream providing device is controllable, and the speed of the high-speed fluid stream is in the range of 50m / s to 330m / s, more advantageously 50m / s to 200m / s or 100m / s to 150m / s, so the speed of transmitting filament on the first direction 107 by conveyor is typically 10m / s to 20m / s. However, these are merely examples and the invention is not limited thereto, and in some instances the density of the high-speed fluid flow and the density of the material whose path is to be controlled may have the effect of selecting an appropriate velocity difference for the velocity of the high-speed fluid (and / or the velocity of the conveying velocity of the material).

[0038] The arrangement may further comprise an air compression device 116 for providing compressed air 117 to an input 118 of the fluid flow providing device 108 .

[0039] Furthermore, the fluid flow providing device 108 may include at least one valve 121 or the like for opening and closing a portion of the output 114 of the fluid flow providing device 108. Furthermore, according to one embodiment, the arrangement may further include a manipulator 122 for rotating the fluid flow providing device 108 about its axis or moving the fluid flow providing device 108 in the first direction and / or the second direction and thereby regulating the fluid flow in a desired manner relative to the delivery device and / or the delivered filament.

[0040] Furthermore, the flow of material (such as a conveying filament) is advantageously continuous, so that when a portion of the material is deflected, the remaining portion will readily follow the previously deflected portion of the material.

[0041] The present invention has been explained above with reference to the aforementioned embodiments, and several advantages thereof have been demonstrated. Obviously, even though pressurized air has been mentioned as an example of a high-speed fluid flow, other types of fluids, such as nitrogen, for example, can also be used. Furthermore, even though the filaments are conveyed by a belt conveyor, other types of conveying devices, such as a rotating drum, can also be used.

[0042] Unless explicitly stated otherwise, the features recited in the dependent claims are mutually freely combinable.

Claims

1. An arrangement (100) for arranging a plurality of filaments (103) conveyed by a conveyor device (101) into at least two separate subsets of the filaments, wherein the conveyor device (101) is configured to receive the filaments (103) from a plurality of outputs (105) to a surface of the conveyor device in an input area (104) of the conveyor device (101), and to convey the filaments in a first direction (107) from the input area (104) to an output area (106) of the conveyor device and again to a further process, wherein the arrangement (100) comprises - at least one fluid flow providing device (108) for providing a fluid flow (109) towards at least a portion of the filaments (103) conveyed by the conveying device (101), thereby deflecting the path of the portion of the filaments in a second direction (110) different from the first direction (107) and separating the portion from the rest (103A) of the filaments (103) into subsets (103B) and again providing at least two separate subsets (103A, 103B) of the filaments.

2. An arrangement according to claim 1, wherein the subsets of filaments (103A, 103B) are again arranged into at least two separate bundles (113) for the further processing of the filaments, wherein the bundles are advantageously individually reopenable bundles that substantially reach the size at which the bundles are wound.

3. Arrangement according to claim 2, wherein the arrangement comprises at least one winding device (102) for winding the bundle of the filaments.

4. An arrangement according to any preceding claim, wherein the arrangement comprises at least two fluid flow providing devices (108) for providing a fluid flow (109) towards at least two portions of the filaments (103) conveyed by the conveying device (101), and thereby providing at least three separate subsets (103A, 103B, 103C) of the filaments and again providing three separate bundles (113) for the further processing of the bundles, wherein the at least two fluid flow providing devices (108) are arranged sequentially in the first direction (107).

5. An arrangement structure according to any preceding claim, wherein the arrangement structure comprises at least two, advantageously as many, collecting devices (111) as the number of the filament subsets (103A, 103B), for collecting and guiding the filament subsets (103A, 103B) after the fluid flow providing device (108) to separate the filament subsets (103A, 103B) into separate bundles (113) for use in the further process, such as a winding or folding process.

6. An arrangement according to claim 5, wherein the collecting device (111) comprises a pressure operating device (112) for reducing the pressure in the collecting device (111), thereby causing a suction effect individually on each individual subset of the individual filaments (103A, 103B) after the fluid flow providing device (108).

7. The arrangement of claim 6, wherein the pressure-manipulating device (112) comprises an ejector.

8. An arrangement according to any preceding claim, wherein the arrangement comprises at least 300, advantageously more than 500, more advantageously more than 1000 and most advantageously more than 3000 or 3500 outputs (105), such as nozzles, to provide substantially the same number of filaments (103), and wherein the fluid flow providing means (108) is configured to arrange portions of the filaments (103) into a plurality of filament subsets (103A, 103B, 103C, 103D, 103F) such that at least one filament subset and therefore at least one bundle (113) has fewer than 300 filaments, more advantageously fewer than 200 filaments and most advantageously at most 150 or 100 filaments.

9. An arrangement according to any preceding claim, wherein the fluid flow providing device (108) comprises an input (113) for receiving a fluid flow and a plurality of outputs (114) for providing and focusing a plurality of high-speed fluid flows toward the conveying filament (103), wherein the velocity of the high-speed fluid flow is configured to be higher than the conveying velocity of the material, whereby the velocity gradient of the high-speed fluid flow is configured to cause a drag force that drags the filament toward a maximum value of the velocity gradient and thereby changes the path of the filament (103).

10. An arrangement according to any preceding claim, wherein at least one fluid flow providing device (108) is arranged between the input region (104) and the output region (106).

11. An arrangement according to any preceding claim, wherein the fluid flow providing means (108) is a fluid conduit, such as a pipe, having a plurality of outputs (114) along the fluid conduit.

12. An arrangement according to any one of claims 9 to 11, wherein the output (114) of the fluid flow providing means (108) comprises a nozzle such as a compressed air nozzle.

13. An arrangement structure according to any one of claims 9 to 12, comprising outputs (114) having different diameters, wherein the smaller diameter output is arranged downstream of the travel direction (107) of the conveying device (101) and the larger diameter output is arranged upstream of the travel direction (107) of the conveying device (101).

14. An arrangement according to any preceding claim, wherein the arrangement comprises air compression means (116) for providing compressed air (117) to the input (113) of the fluid flow providing means (108).

15. A method for arranging a plurality of filaments (103) conveyed by a conveying device (101) into at least two separate subsets of said filaments, The method (100) comprises the following steps: - receiving filaments (103) from a plurality of outputs (105) to a surface of the conveyor (101) in an input region (104) of the conveyor and conveying the filaments in a first direction (107) from the input region (104) to an output region (106) of the conveyor and again to a further process, and - providing a fluid flow (109) towards at least a portion of the filament (103) conveyed by the conveying device (101), thereby deflecting the path of the portion of the filament in a second direction (110) different from the first direction (107) and separating the portion from the rest (103A) of the filament (103) into a subset of filaments (103B) and again providing at least two separate subsets of filaments (103A, 103B) of the filament.

16. Method according to claim 15, wherein the subset of filaments (103A, 103B) is separated again into at least two separate bundles (113) for the further processing of the filaments, wherein the bundles are advantageously individually reopenable bundles.

17. The method according to claim 15 or 16, wherein the flow rate of the fluid flow provided by the fluid flow providing device is controlled, and wherein the speed of the fluid flow is 50m / s to 330m / s, advantageously 50m / s to 200m / s and most advantageously 50m / s to 150m / s.

18. Method according to any one of claims 15 to 17, wherein the subset of filaments (103A, 103B) and, again according to claim 16, the bundle (113) are made of continuous filaments.

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