JP3453566B2 - Method of manufacturing fluff yarn - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for producing a fluff yarn which is fluffed by using a plurality of lower twist multifilament yarns obtained by adding real twist to a large number of constituent filament single yarns. > Relate.

[0002]

2. Description of the Related Art A fluff yarn used as a spun-like yarn or the like is obtained by compounding a plurality of undertwisted multifilament yarns (generally two or three) which are actually twisted. The actual twist (twist at this stage is referred to as "upward twist") is added, and each of the undertwisted multifilament yarns is a thread obtained by cutting a part of the filament single yarn. It is a fluffy state that protrudes to the surface. Here, "each ply-twisted multifilament yarn" is obtained by adding real twist (twist at this stage is called "bottom twist" or "first twist") to a large number of constituent filament single yarns. In addition, "added yarn and actual twist (twist at this stage is called" upward twist ") means that the number of upper twists is about 60 to 100 of the lower twists.
%, And this is the thread with the usual number of twists.

Conventionally, there have been the following two methods for producing such fluff yarn. In the first fluff yarn manufacturing method, the twisted multifilament yarn is wound around a guide to make a reciprocating state, and the forward side and the backward side are made to intersect with each other, and one side is strongly pulled out, whereby the above-mentioned intersecting portion. Twist and handle at the same time to generate fluff, and then combine multiple fluffed lower-twisted multifilament yarns and add upper twist (actual twist) to all of them. That is.

In the second fluff yarn manufacturing method, for example, three rotating tools provided with a false false twisting disk and a rough surface (abrasive) disk in a skewered manner on the rotating shaft are parallel to each other in their axial directions. The adjacent discs are arranged in a meshed manner in the axial direction so that they are gathered together, and one twisted multifilament yarn is passed through the gathering center of these rotating tools to contact the outer peripheral end of each disc. In this state, all the rotating tools are rotated and the lower twisted multifilament yarn is fed to add fluffing and false twist at the same time.

The first fluff yarn manufacturing method is, for example, Japanese Patent No. 2973828, Japanese Patent Laid-Open No. 2-216233, Japanese Patent Publication No. 7-103501, and Japanese Patent Laid-Open No. 8-33.
7937, JP-A-10-102341, JP-A-10-110343, and Japanese Patent No. 2621973.
It is described in the official gazette. The second fluff yarn manufacturing method is disclosed in JP-A-4-240237 and JP-A-5-518.
34, JP-A-8-158187 (above,
Specified mainly to reverse the direction of the false twist and the direction of the false twist), JP-B-58-46129, JP-B-6
No. 2-6010 (the above mainly defines the arrangement and shape of the friction false twisting disc and the rough surface disc).

[0006]

In the first fluff yarn manufacturing method described above, since it is necessary to rub the undertwisted multifilament yarns strongly with each other, a strong tension must be applied to the undertwisted multifilament yarns. However, it has been sometimes said that the yarn breakage of the twisted multifilament yarn itself tends to occur due to this. Due to this strong tension, the constituent filament single yarns of each ply-twisted multifilament yarn were also subjected to strong stress and damage at the same time, and the strength of the ply-twisted multifilament yarn after fluffing was often greatly reduced. . That is, the yield is inferior, which increases the manufacturing cost of the fluff yarn,
This led to a large decrease in the strength of the fluff yarn.

On the other hand, in the second fluff yarn manufacturing method described above, since the roughened disk is strongly pressed against the lower twist multifilament yarn, strong tension must also be applied to the lower twist multifilament yarn. Therefore, there is a problem that the twisted multifilament yarn itself is liable to be broken, the constituent multifilaments that do not cause fluff are often damaged, and the strength after fluffing is greatly reduced.

In other words, this second fluff yarn manufacturing method also has a poor yield, which increases the fluff yarn manufacturing cost and leads to a significant decrease in the fluff yarn strength. In addition, it may not be possible to increase the feed rate of the undertwisted multifilament yarn in order to surely polish the undertwisted multifilament yarn and to cause sufficient fluffing. Therefore, the productivity of the fluff yarn is increased accordingly. There was a problem of low. Further, in the second fluff yarn manufacturing method, there is also a problem that variations (polishing unevenness) easily occur in the quality of the manufactured fluff yarn. Further, there is a problem that it is difficult to obtain a fluff yarn that is stable in quality over time because the wear of the disc is constantly deteriorated.

The object of the present invention has been made in view of the above circumstances, and it is possible to reduce the manufacturing cost and improve the productivity while causing sufficient fluffing and reducing the strength after fluffing. It is an object of the present invention to provide a method for producing a fluff yarn that enables the production of a fluff yarn with less loss.

[0010]

In order to solve the above-mentioned problems and achieve the above-mentioned objects, the fluff yarn manufacturing method of the present invention comprises:
A plurality of ply-twisted multi-filament yarns obtained by adding real twist to a large number of constituent filament single yarns are used, and these plural ply-twisted multi-filament yarns are aligned.
Then, the friction false-twisted body causes a rotational motion to the whole of these plural twisted multifilament yarns to add false twist, and at the same time as this false twist, the individual twisted multifilament yarns themselves are also rotated. Causes a circular motion.

The case where two lower twist multifilament yarns are fed will be described (see FIGS. 5, 6 and 8 described later). Each twisted multifilament yarn X, Y
While rotating in a rotational manner by the frictional force caused by contact with the false false-twisted body 21, the two as a whole also rotate. Therefore, when the lower twist multifilament yarns X and Y that rotate in a rotating manner rub against each other, a part of the constituent filament single yarn is cut to form fluff. In this case, each ply-twisted multifilament yarn X, Y behaves as two due to the constraint that the ply-twisted true twist is added. That is, if the undertwisted multifilament yarns X and Y are not added with the actual twisted undertwist, only the rotational movement as a single mixture of the constituent filament single yarns occurs. Will not occur.

The friction false-twist body 26 shown in FIG. 6 shows a case where a plurality of pretwisted multifilament yarns X and Y are brought into contact with the rotary disk 26 arranged on two rotary shafts. But,
The friction false-twist body of the present invention is not limited to this, and for example, an inner circumferential friction false-twist method in which a plurality of lower twist multifilament yarns X and Y are brought into contact with a cylindrical inner circumferential surface as shown in FIG. , A uniaxial outer peripheral friction method in which at least one rotating disk of one rotating shaft is arranged, or at least one rotating disk is provided on each of two or more parallel rotating shafts. It is also possible to adopt a multi-axis outer peripheral friction method in which the outer peripheral surfaces are arranged in a state of overlapping and juxtaposed in the axial direction. Further, as the friction false-twisted body of the present invention, a belt false-twisting method of giving a false twist by sandwiching a plurality of pretwisted multifilament yarns between belts rotating in the reverse direction, or reversely rotating with a rotating disc. It is also possible to adopt a system in which the lower twist multifilament yarn is sandwiched between the rotating belts.

Next, the case where three twisted multifilament yarns are aligned and brought into contact with a rotating disk disposed on three rotating shafts (see FIG. 1) will be described as an example. The twisted multifilament yarns X, Y, and Z are arranged in triangular points in a cross-sectional view, but if this positioning is, for example, clockwise, position 1, position 2, position 3, The false twist applied to the entire multifilament yarns X, Y, Z is such that the lower twisted multifilament yarn X at position 1 is at position 2 and the lower twisted multifilament yarn Y at position 2 is at position 3 1 for the twisted multifilament yarn Z at the 3rd position
It is a twist that is repeated by rotating each of them to turn position.

At the same time, the rotation of the individual ply-twisted multifilament yarns X, Y, Z themselves is caused to rotate, that is, the ply-twisted multifilament yarn X at the 1st position is the above-mentioned. In addition to the rotation movement, the yarn itself rotates, and the second twisted multifilament yarn Y also rotates independently of the rotation movement, and the third twisted multifilament yarn Z also moves as described above. In addition to rotating movement, it also rotates itself,
Say that. Such double twist (rotational movement)
When simultaneously added, each twisted multifilament yarn X,
During the rubbing of Y and Z, the constituent filament single yarns rub against each other at a speed twice as fast as the rotation speed (because it becomes a relative speed between the filament and the twisted multifilament yarn of the other party), and thereby, each other. Appropriate cutting will occur in the constituent filament single yarn of (the fluff occurs).

In this manner, a fluff yarn is produced in which fluff is formed at the cut portion of the constituent filament single yarn. Here, the friction false-twisted body can be formed by a rotating disk having an outer peripheral surface at a portion in contact with the lower twist multifilament yarn. When the friction false-twisted body is provided with rotating discs, these rotating discs should have at least 1 on one axis.
Only one sheet is required, but in order to enhance the false twist effect (rotation effect), a plurality of skewered pieces may be arranged.

The friction false-twisted body has a plurality of rotating shafts in parallel with each other, and at least one rotating disk is provided for each rotating shaft, and the rotating disk is The outer peripheries thereof may be arranged in a state where they are meshed with each other in the axial direction in a staggered manner (a state in which they are stacked in parallel). As the friction false-twisted body, it is preferable to use one that can generate a dynamic friction coefficient of 0.25 or more when contacting the lower twist multifilament yarn.

This point is remarkably different from the one in which the thread shape is strongly pressed against the roughened disk used in the second fluff thread manufacturing method in the related art. That is,
In the conventional second fluff yarn manufacturing method, since the rough-twisted multifilament yarn is directly ground by the roughened disc, the surface roughness is a structural condition required for the roughened disc. However, although the rubbing between the filament and the rough surface disc was emphasized, in the present invention, since fluff is generated by rubbing between the lower twist multifilament yarns, the false false twist body is As described above, the coefficient of kinetic friction with the twisted multifilament yarn is more important than the surface roughness.

The yarn speed ratio can be obtained by dividing the peripheral speed at the portion where the friction false twisted body comes into contact with the lower twisted multifilament yarn by the feed speed of the lower twisted multifilament yarn. In the above, the yarn speed ratio is preferably 1.5 or more. If the yarn speed ratio is less than 1.5, the amount of fluff generated becomes insufficient, and the tension of the twisted multifilament yarn tends to fluctuate, which may lead to yarn breakage. Further, it is preferable that the feeding speed of the twisted multifilament yarn is 100 m / min or more. If the feeding speed is slower than 100 m / min, each twisted multifilament yarn will be unwound from the bobbin, and snarl during the fluffing process (due to the twisting of each twisted multifilament yarn due to loose tension) As a result, a twist loop is formed to the side), and the number of defective yarns including yarn breakage and snarl is increased.

The rotary disc of the false false twist body is preferably made of urethane. When urethane disc is used for the rotating disk, fluff yarn that is much stronger than ceramic and ceramic spray specifications can be produced.

If each of the plurality of ply-twisted multifilament yarns is false twisted yarn, the false twisted yarn has many fluffs even when the filament single yarn is thicker and the number of filaments is smaller than the drawn yarn. Since it occurs and the fluff processing draw ratio range is wide, stable fluff processing with less yarn breakage than the drawn yarn can be performed. When the plurality of ply-twisted multifilament yarns are drawn yarns and false-twisted yarns, the number of fluffs between the false-twisted yarns and the drawn yarns is generated, and when dyed, there is unevenness of the carded tone. It is possible to make fluff yarn (wool-like synthetic fiber fluff yarn).

On the other hand, the fluff processing apparatus according to the present invention is used in the above-described fluff yarn manufacturing method of the present invention, and is in contact with a plurality of ply-twisted multifilament yarns aligned with each other. It is provided with a friction false-twisted body that is rotated and simultaneously causes false twisting and individual self-rotating twisting. Specifically, in a fluffing device equipped with a friction false-twisting body that causes fluffs by abutting the yarns traveling at a predetermined speed on the outer peripheral portion of a rotating disc, a plurality of individual twisted multifilaments Arrange bobbins for winding each yarn, and sandwich a plurality of ply-twisted multifilament yarns from each of these bobbins by sandwiching means (for example, between the feeding roller and the apron belt driving device),
It is supplied in the state of being aligned in one friction false-twisted body.
This fluffing device requires as many bobbins as the number of twisted multifilament yarns to be used, and a holding portion for the bobbins. When a plurality of ply-twisted multifilament yarns drawn from a plurality of bobbins are clamped by a clamping means and fed in a state in which they are aligned in one friction false-twisted body, fluctuations in the unwinding tension in the bobbin and between the bobbins It is possible to reduce variations in tension and make it difficult (less) to propagate fluctuations in unwinding tension to the friction false twist body. For each twisted multifilament yarn wound on each bobbin, for each twisted multifilament yarn unwound from each bin, a yarn for individually detecting breakage before they are aligned with each other By providing the detector, it is possible to prevent the occurrence of defective products due to the insufficient number of twisted multifilament yarns.

When a yarn break is detected by this yarn detector, the remaining twisted multifilament yarn is
It suffices to cut the yarns by the yarn cutting means on the upstream side of the position where the driving force is applied to them. Further, instead of the yarn cutting means, it is possible to stop the device for applying the delivery drive to the twisted multifilament yarn, or to provide a device for notifying the worker of the yarn breakage.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

First, in order to make the understanding of the present invention accurate, the terms used in the present specification will be explained first. Since chemical fibers are spun as filaments,
A filament yarn can be obtained by bundling these and twisting them if necessary. A yarn composed of two or more filaments is called a multifilament yarn. When the filament is thick to some extent and has strength and elongation that can be practically used, one filament is called a monofilament yarn. The twisting method depends on the twisting direction (the direction in which the fiber bundle or the yarn bundle is twisted around the bundle axis) and the number of twists (degree of twisting). The twist direction is indicated as Z twist and S twist depending on the direction of inclination of the fibers on the yarn surface with respect to the yarn axis. In Japan, left twist means Z twist, and right twist means S twist. The false twisting method is one of the twisting methods in the method for producing textured yarn, and is a method of continuously performing three operations of twisting, heat setting and untwisting while running the yarn, and Obtained by grasping the part and twisting it around the thread axis. At this time, the same number of threads are applied to the upper and lower threads of the grip, but the twists in opposite directions are applied.However, this twist is only an apparent twist, and when the grip is released, the thread is twisted. Return to the state. The true twist means that the twist is not added to the untwisted state but the twist is actually added, and the lower twist and the upper twist mean the above true twist.

(Fuzzing Device) FIGS. 1 to 4 show a first example of the fluffing device 1 used in the fluff yarn manufacturing method of the present invention. As shown in FIG. 2, a plurality of ply-twisted multifilament yarns X, Y, and Z are supplied to one friction false-twisted body 21 in a aligned state. That is, the lower twisted multifilament yarns X, Y and Z wound around a plurality of bobbins 2, 3 and 4 (three in the illustrated example) are upstream delivery rollers (also referred to as “first feed rollers”) 5 and After passing through the guide 6 and passing through the friction false twist body 21, the fluff yarn W
Then, after passing through the guide 7 and the downstream side delivery roller 8, it is wound by the winding cheese 10 while being driven by the winding roller 9.

The upstream side delivery roller 5 and the downstream side delivery roller 8 sandwich and deliver a plurality of ply-twisted multifilament yarns X, Y and Z aligned by apron belt drive devices 12 and 13, respectively. . For example, in these apron belt drive devices 12, 13, the friction false twist body 21 is passed by performing balance control of the upstream side delivery roller 5 and the downstream side delivery roller 8 (also referred to as “second feed roller”). The tension of a plurality of ply-twisted multifilament yarns X, Y, Z can be adjusted, and the amount of fluff can be adjusted accordingly. Of course, the feed rate can be set to a predetermined value by controlling them synchronously. In addition, a plurality of ply-twisted multifilament yarns X, Y,
When Z is sandwiched between the delivery roller 5 which is the sandwiching means and the apron belt drive device 12 and is fed to one friction false twist body 21 in a aligned state, the unwinding in the bobbins 2, 3 and 4 is performed. Variations in tension and variations in tension between the bobbins 2, 3, 4 can be reduced, and variations in unwinding tension are less likely to propagate to the false false-twist body 26 (reduced). Then, if the sandwiching between the delivery roller 5 and the apron belt drive device 12 is continued (the sandwiching by the sandwiching means is at least 2).
When it is made continuous, the fluctuation in tension between the delivery roller 5 and the false false-twist body 26 becomes small, and the yarn breakage decreases.
Further, when the bobbins 2, 3 and 4 constitute one weight and a plurality of weights are continuously arranged, variations in the quality of the fluff yarn between the weights are reduced. As a sandwiching means for the plurality of ply-twisted multifilament yarns X, Y, Z, the delivery roller 5 is used.
It is not limited to the apron belt drive device 12 and may be sandwiched between a rubber roller and a rubber roller, for example.

For the lower twist multifilament yarns X, Y and Z sent from the bobbins 2, 3 and 4, yarn detection for individually detecting yarn breakage before they are aligned with each other is performed. Devices 15, 16 and 17 are provided. These yarn detectors 15, 16 and 17 are, for example, photoelectric tubes, and are connected so as to output a signal indicating the presence or absence of the twisted multifilament yarns X, Y and Z to the signal control unit 18. In addition, immediately upstream of the upstream delivery roller 5 (not particularly limited as long as it is from the bobbins 2, 3, 4 to the upstream delivery roller 5), the lower twist multifilament yarn X,
A thread cutting means 19 is provided which can cut Y and Z at a stretch. The thread cutting means 19 is operable based on the operation signal from the signal control section 18 described above.
That is, when at least one of the twisted multifilament yarns X, Y, Z of the yarn detectors 15, 16 and 17 detects the yarn breakage, the yarn cutting means 19 remains the undertwisted multifilament yarn X, The Y and Z are cut off, and thereafter, the delivery drive by the upstream delivery roller 5 is stopped. This is to prevent generation of defective products due to insufficient number of the twisted multifilament yarns X, Y, Z.

As shown in FIGS. 3 and 4, in the fluff processing apparatus 1, three friction false twisted bodies 21 are gathered together on the upper portion of the apparatus main body 20 so that the vertical positions of the twisted twisted bodies 21 are meshed with each other alternately. The twisted body 21 is rotated by the rotation driving means 22 provided on the lower side of the apparatus body 20. Each friction false-twisted body 21 has a plurality of (three in the illustrated example) rotating discs (also referred to as disks) 2 with respect to the rotating shaft 25.
6 is skewered, and the rotating discs 26 are uniaxially arranged so that a gap 27 exceeding the thickness of two rotating discs 26 is formed between them. Has become. As for the arrangement relationship in each friction false-twisted body 21, the respective rotary shafts 25 are parallel to each other with the adjacent friction false-twisted bodies 21, and the respective rotary discs 26 and the respective gaps 27 are opposed to each other. The rotating discs 26 are axially superposed with each other.

As shown in FIG. 1, the friction false-twisted bodies 21 are gathered together in this manner, and as shown in FIG. 1, a triangular prism-shaped space penetrating in the longitudinal direction (enclosed by the outer peripheral end of the rotary disc 26). 30) will be formed, and this space 3
0 serves as a yarn passage 30 for inserting the twisted multifilament yarns X, Y, Z. As shown in FIGS. 3 and 4, the rotary shafts 25 are made closer to each other in the axial distance to increase the contact pressure between the rotary disk 26 and the lower twist multifilament yarns X, Y, Z, and the frictional force is increased. Is set so that the false twist effect (rotational effect) is enhanced. In this case, the above-mentioned triangular prism-shaped space is apparently not formed, but the twisted multifilament yarns X, Y, and Z are bent and come into contact with the rotary disk 26 of each rotary shaft 25. Thus, the yarn passage 30 is formed in a meandering shape, and the yarn passage 30 is substantially formed. The apparatus main body 20 is provided with an upper thread guide 32 above the thread passage 30 and a lower thread guide 33 below the thread passage 30. Further, the rotation driving means 22 is composed of one friction false twist body 21.
Wobble 3 provided at the lower end of the rotary shaft 25 of the
5 is rotated by the tangential belt 36, and the rotational force is transmitted from this rotary shaft 25 to the rotary shafts 25 of the other two friction false twist bodies 21 via the toothed belt means 37. For this reason, all the friction false-twisted bodies 21 are rotated in the same direction at the same number of rotations.

Therefore, the lower twist multifilament yarns X, Y and Z are gathered together so that the vertical positions thereof are staggered, and a plurality of lower twist multifilament yarns (X , Y, Z) are brought into contact with each other in a aligned state, and a state in which the rotation movement is performed as a whole while the individual rotation movements are performed is obtained.

The dynamic friction coefficient (μ) can be obtained from the following relational expression.

[0032]

[Equation 1]

In this equation 1, θ is a contact angle (radian), T is an inlet tension, T2 is an outlet tension, and e is a constant (about 2.7).

In order to obtain such a dynamic friction coefficient, it is difficult to satisfy the above-mentioned predetermined value even if the rotary disc (also referred to as a disk) 26 is made of chrome-plated satin finish, and it is difficult to satisfy the above-mentioned predetermined value. ) Or made of urethane (see the second example described later with reference to FIG. 7). In the rotary disc 26 of the friction false-twist body 21, the surface roughness of the outer peripheral edge is sufficient if it is 10 S or less, but 10 S is sufficient.
It does not matter even if it exceeds.

Further, the lower twist multifilament yarn X,
The Y and Z feed rates are set to 100 m / min or more. On the other hand, the number of rotations of each friction false twist body 21 by the rotation driving means 22 is determined by determining the peripheral speed on the outer peripheral surface of the rotating disk 26 as the lower twist multifilament yarn X,
It is set as a standard that the yarn speed ratio obtained by dividing by the Y and Z feed speeds is 1.5 or more.

FIG. 7 shows another example of the fluffing apparatus 1 used in the fluff yarn manufacturing method of the present invention. In the fluffing device 1 of the second example, the rotary discs 26 including the respective false false-twisted bodies 21 are made of urethane, and in order to suppress wear of the rotary discs 26, the yarn passage 30 A guide disk 37 having excellent wear resistance is provided so as to correspond to the inlet portion (upper end opening portion) and the outlet portion (lower end opening portion).

FIGS. 8 and 9 show still another example of the fluffing device 1 used in the fluffing method for the pretwisted multifilament yarns X, Y, Z of the present invention. The fluff processing device 1 of this example employs an inner circumferential friction false twist method. That is, the friction false twist body 21 has a short cylindrical shape, and
Only one is provided. Although not shown, the friction false twist body 21 is rotated by the rotation driving means 22 in this third example as well. In the third example, the cylindrical hole formed in the central portion of the friction false twist body 21 serves as the thread passage 30.
Zero twisted multifilament yarns X, Y, Z
Is brought into contact with the inner surface of the cylindrical hole of the friction false twisted body 21 to cause rotation-like rotational movement and overall rotation.

(Production Method of Fluff Yarn) Next, a method of the present invention for producing the fluff yarn W using the fluff processing apparatus 1 having such a configuration will be described.

With the lower-twisted multifilament yarns X, Y, Z inserted in the yarn passage 30, the full friction false-twisted body 21 is rotated in the same direction (counterclockwise direction in FIG. 1) by the rotation driving means 22. ) To the lower twisted multifilament yarns, and the lower twisted multifilament yarns X, Y, Z are driven to feed (from top to bottom in FIGS. 3 and 4). The yarns X, Y, Z are given a rotational force from the rotating disc 26 of the friction false twist body 21 with which they are in contact. Therefore, the twisted multifilament yarns X, Y, and Z are repeatedly twisted so that the entire twisted multifilament yarns X, Y, and Z move in a clockwise direction in FIG. That is, by this, false twisting is performed.

At the same time, the individual twisted multifilament yarns X, Y, and Z are subject to self-rotational twisting. Therefore, during rubbing between the twisted multifilament yarns X and Y, Between the rubbing between the lower twist multifilament yarns Y and Z, and between the lower twist multifilament yarns Z and X,
Each of the twisted multifilament yarns X, Y, Z has a proper filament breakage in the constituent filament single yarns, which causes fluffing due to this yarn breakage portion. In this way, the fluff yarn W is manufactured.

The obtained fluff yarn W becomes a fluff compound yarn when wound as it is, and can be used as a fluff single yarn when loosened one by one and wound. Further, the fluff yarn W has a long distance of 1 m or more in which a region in which each of the twisted multifilament yarns X, Y, and Z rubs against each other (a region in which a fluff generation action occurs: a symbol M in FIG. 2) can be made longer. There is little variation in the number of fluffs generated, and it is of high quality. When the lower twist multifilament yarns X, Y, Z are driven to be fed, the feeding speed can be set to a high speed of 400 m / min or more. This is because the effect of yarn breakage due to rubbing of the constituent filament single yarns of each of the twisted multifilament yarns X, Y, and Z (fluffing action) has low dependency on the yarn speed. Therefore, the production efficiency of the fluff yarn can be dramatically improved, and each bobbin 2,
It is possible to prevent the generation of snarl when unwinding (pulling out) each of the twisted multifilament yarns X, Y, Z from 3, 4 and thereby eliminating the need for a device for preventing snaral generation, and There is an advantage that fluctuations can be reduced.

Further, the lower twist multifilament yarn X,
Since the tension to be applied to Y and Z does not have to be set so high, yarn breakage is less likely to occur, and the yield can be improved, and the fluff yarn strength after fluffing is not significantly reduced.

By the way, as shown in FIGS. 5 and 6, the fluff yarn can be manufactured by inserting only the two twisted multifilament yarns X and Y into the yarn passage 30. However, in this case, the outer peripheral surface of the rotary disk 26 in the false false twist body 21 and the lower twist multifilament yarn X, Y
It is preferable to take a measure such as setting a high coefficient of dynamic friction between and, or increasing the number of rotating false disks 21 provided with the rotating disk 26. On the other hand, if the number of yarn passages 30 is increased to 3 or more, the above measures are not taken and
A large number of fluffs are generated when a plurality of fibers rub against each other.

The present invention is not limited to the above-described embodiments, but can be modified appropriately according to the embodiments. For example, in FIG. 1, FIG. 5, FIG. 6 and FIG. 8, the fineness and the number of filamentary filament single yarns of each twisted multifilament yarn X, Y, Z are shown to be the same, but different from each other. Good. Further, in FIGS. 3 and 4, three rotating discs 26 are provided for each rotating shaft 25, but depending on the implementation conditions, at least one rotating disc 26 may be provided for each rotating shaft 25. It is enough if more than one is arranged,
Also, it is not necessary to make the numbers the same.

[0045]

Example 1 Using the fluffing machine 1 of the first example (see FIGS. 1 to 4), a test was conducted to examine the relationship between the number of lower twisted multifilament yarns used, the draw ratio and the number of fluffs. . The rotary disc 26 of the friction false-twist body 21 is made by ceramic spraying, and the total of the three friction false-twist bodies 21 is 7 in total.
A single rotating disk 26 is used. The yarn speed was set to 200 m / min, and the yarn speed ratio was unified to 1.83. The test results are shown in Table 1.

[0046]

[Table 1]

The number of fluffs is obtained by magnifying a sample having a length of 10 cm by 20 times with a microscope and visually counting, and multiplying the counted value by 10. As is clear from Table 1, the samples 1 to 6 according to the present invention can obtain a sufficient number of fluffs even if the draw ratio (tension) is not set so high. On the other hand, specimens 7 to 10 as comparative examples
Then, draw ratio (tension) until just before the yarn breaks
It can be seen that the number of fluffs is very bad despite the fact that it is applied. In addition, there are variations in the number of fluffs generated,
Thread breaks also occur with a high probability.

[0048]

[Embodiment 2] In the false false twisted body 21, the material of the rotating disk 26 is made different, that is, the fluff of the first example (see FIGS. 1 to 4) and the second example (see FIG. 7). Processing device 1,
For other materials (comparative examples), a test was conducted to examine the relationship between the dynamic friction coefficient and the number of fluffs. Two twisted multifilament yarns were used (Fig. 5).
And FIG. 6). The yarn speed was set to 300 m / min and the yarn speed ratio was unified to 1.067. The test results are shown in Table 2.

[0049]

[Table 2]

The number of fluffs is obtained by magnifying a sample having a length of 10 cm by 20 times with a microscope and visually counting, and multiplying the counted value by 10. Further, an F meter manufactured by Roshshield Co. was used for measuring the dynamic friction coefficient. In Table 2, the number of urethane rotary disks 26 used is five because two guide disks 37 are provided. As is clear from Table 2, when the rotary disk 26 is made of ceramic, ceramic sprayed specifications, or urethane, a high dynamic friction coefficient is obtained, and thus it is found that a sufficient number of fluffs are obtained. . Especially in the case of urethane, since the surface friction is small and the dynamic friction coefficient is large, the occurrence of fluff is the highest. On the other hand, in the case of the chrome-plated satin finish specification, the dynamic friction coefficient cannot be increased to a predetermined value (0.25), so that fluff cannot be generated. On the other hand, as is clear from the fact that the surface roughness (S) is also shown for reference, it should be said that there is no correlation between this surface roughness and the number of fluffs generated (pieces / m). That is, according to the present invention, a rough surface disk is not necessary and fluff is generated.

[0051]

Example 3 Using the fluffing machine 1 of the first example (see FIGS. 1 to 4), the lower twist multifilament yarns X, Y,
A test for examining the relationship between the yarn speed ratio of Z and the number of fluffs (pieces / m) was conducted. Two twisted multifilament yarns were used (see FIGS. 5 and 6). In addition, the yarn speed is 300
m / min, and the stretching ratio was unified to 1.067. The rotary disc 26 of the friction false-twisted body 21 was made by ceramic spraying, and a total of seven rotary discs 26 of the three friction false-twisted bodies 21 were used. The test results are shown in Table 3.

[0052]

[Table 3]

The number of fluffs is obtained by magnifying a sample having a length of 10 cm by 20 times with a microscope and visually counting, and multiplying the counted value by 10 times. As is clear from Table 3, the test pieces 1 to
In No. 7, it can be seen that the higher the condition that the yarn speed ratio is set to a predetermined value (1.5) or higher, the more the number of generated fluffs is obtained in a range exceeding the sufficient amount. Increasing the yarn speed ratio means that the rotating disk (disk) 26
Since the number of rotations of the twisted multifilament yarns X, Y, Z increases and the yarn feeding effect also increases, the entrance tension of the rotating disk (disk) 26 also increases. Is. On the other hand, in Specimens 8 and 9 as comparative examples, the number of fluffs is extremely small due to the lack of the yarn speed ratio, and the yarn breakage easily occurs.

[0054]

Example 4 Using the fluffing machine 1 of the first example (see FIGS. 1 to 4), a false twisted false twisted yarn is produced at a yarn speed of 400 m / min.
It was fluffed with a ceramic sprayed disk at a yarn speed ratio of 1.83. The test results are shown in Table 4. Here, the twisted false twisted yarn is a yarn obtained by adding the twisted twist to the false twisted yarn, and the twisted drawn yarn is a yarn obtained by adding the twisted twist to a stretched yarn that is generally performed. is there. The stretched yarn is obtained by stretching an unstretched yarn or a semi-stretched yarn, but the semi-stretched yarn is easily stretchable and has low strength, which is not practically preferable. Further, recently, a spun drawn yarn that is continuously drawn with a spun yarn is often used, and this spun drawn yarn is also included.

[0055]

[Table 4]

FIG. 10 is a graph in which the number of fluffs of a false twist false twisted yarn and a false twist drawn yarn when the number of compound yarns is 3 is compared and plotted. As is clear from Table 4 and FIG. 10, when the draw ratio is changed, the draw ratio is 1.040 to 1.060.
Within the range, there is no difference in the occurrence of fluff, but when the draw ratio exceeds 1.060, it can be seen that the twisted false twisted yarn has much more fluff than the drawn yarn. This is because the cross section of the drawn yarn is usually circular, and the cross section of the false twist false twisted yarn is polygonal, so that when they are brought into contact with the rotating disc, they are rubbed against each other due to the occurrence of a rotational motion of rotation. It is considered that this is because fluffs are likely to be caught on the corners of the polygonal shape.
In addition, since the false twist false twisted yarn has a wide range of fluffing draw ratio, it is possible to perform stable fluffing with less yarn breakage than the false twist drawn yarn. Further, in the test pieces 1 to 6 in Table 4, the number of yarns is 3
It is a book, and Samples 7 to 11 in Table 4 have two combined yarns, but it is also understood that the fluff occurrence rate can be increased by increasing the number of combined yarns.

[0057]

Example 5 This is an example in which the fluffing apparatus 1 of the first example (see FIGS. 1 to 4) was used to fluff the lower twisted false twisted yarn and the lower twisted drawn yarn by mixing them. The test results are shown in Table 5. The yarn speed is 400 m / min and the yarn speed ratio is 1.83.
It is fluffed with a ceramic sprayed disc.

[0058]

[Table 5]

In the left column of Table 5, a plurality of ply-twisted multifilament yarns are fluffed with only ply-twisted drawn yarns.
In the right column of, the fluff is processed only with the false twist false twisted yarn. When both the false twist false twisted yarn and the twisted drawn yarn are mixed,
It can be seen that the number of fluffs between the twisted false twisted yarn and the twisted drawn yarn occurs. In addition, when both are mixed and dyed, a fluffy yarn having irregular worsted appearance is formed. That is, it is possible to produce a synthetic wool feather yarn having a wool-like unevenness.

[0060]

[Embodiment 6] FIG. 11 compares the strengths of the rotating disk 26 made of a rough disk, ceramic sprayed specification, or urethane. Stretched yarn speed is 400m /
It is fluffed at a yarn speed ratio of 1.83. If urethane disk is used for the rotating disk 26, ceramic,
It can be seen that fluff yarn that is much stronger than the ceramic sprayed specifications can be made. Therefore, when the results of Table 2 are summed up, when a urethane disk is used for the rotary disc 26, a high dynamic friction coefficient is obtained, and thus a sufficient number of fluffs can be obtained and a strong fluff yarn can be formed.

[0061]

According to the method for producing a fluff yarn of the present invention , a plurality of ply-twisted multifilament yarns are caused to undergo a rotary motion to impart false twist to the whole ply-twisted multifilament yarns, By adding double twist at the same time that the filament yarn itself also causes a rotational movement, it is suitable for the constituent filament single yarn during rubbing of each twisted multifilament yarn under low tension. Therefore, it is possible to produce a fluff yarn that is sufficiently fluffed and that has a small decrease in strength after fluffing, while aiming to reduce manufacturing costs and improve productivity because it causes fluffing. It is possible.

[0062]

[Brief description of drawings]

FIG. 1 is an enlarged plan sectional view of a main part (corresponding to an enlarged sectional view taken along the line AA of FIG. 4) showing a first example of a fluff processing device of the present invention.

FIG. 2 is a schematic view showing a fluff yarn production line using the fluff processing device.

FIG. 3 is a perspective view showing a first example of a fluff processing device according to the present invention.

FIG. 4 is a front view corresponding to FIG.

FIG. 5 is an enlarged plan cross-sectional view for explaining an undertwisted multifilament yarn by aligning two undertwisted multifilament yarns in the manufacturing method of the present invention.

FIG. 6 is an enlarged plan sectional view showing an operation state following FIG. 5;

FIG. 7 is a perspective view showing a second example of the fluff processing device according to the present invention.

FIG. 8 is an enlarged sectional view of an essential part (corresponding to an enlarged sectional view taken along the line BB of FIG. 9) showing a third example of the fluffing device according to the present invention.

FIG. 9 is a schematic diagram showing a fluff yarn manufacturing line using the fluff processing device of the third example.

FIG. 10 is a graph showing a comparison of the numbers of fluffs of a false twist false twisted yarn and a twisted drawn yarn.

FIG. 11 is a diagram comparing the strength of a rotating disk made of a rough disk, ceramic sprayed specification, or urethane.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 fluffing device 2, 3, 4 bobbin 5 delivery roller (sandwiching means) 12 apron belt drive device (sandwiching means) 15, 16, 17 yarn detector 19 yarn cutting device 21 friction false twist body 26 rotating disc 30 friction temporary Space in which twisted bodies are gathered together X, Y, Z Bottom twisted multifilament yarn W Wool yarn

Front page continuation (72) Inventor Eiichi Hashi, Minamimorimoto Re 95, Kanazawa, Ishikawa Prefecture, Ishikawa Plant (56) References JP-A-55-98932 (JP, A) JP-A-8-158187 (JP) , A) JP 9-59836 (JP, A) JP 6-240528 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D02G 1/00-3/48 D02J 1/00-13/00

Claims (7)

(57) [Claims] 1. A plurality of ply-twisted multifilament yarns obtained by actually twisting a large number of constituent filament single yarns are used, and a plurality of these ply-twisted multifilament yarns are aligned, and all of them are aligned. By contacting the rotating false-twisted body with the rotating false-twisted body, a false-twisting is caused by adding the false-twisting motion to the individual twisted multifilament yarns themselves. A method for producing a fluff yarn, which comprises rubbing multifilament yarns with each other, cutting a part of the constituent filament single yarns, and forming fluff by this cutting to produce a fluff yarn. 2. The false-twisted friction body is formed of a rotating disc having an outer peripheral surface at a portion in contact with the lower twist multifilament yarn, and the outer peripheral surface of the rotating disc and the lower twist multifilament yarn. 2. The method for producing fluff yarn according to claim 1, wherein the dynamic friction coefficient is 0.25 or more. 3. The friction false twisted body has a plurality of rotating shafts in parallel with each other, and at least one rotating disk is provided for each of these rotating shafts. 3. The fluff yarn manufacturing method according to claim 2, wherein the rotating discs are arranged in such a manner that their outer peripheral surfaces are meshed with each other in an axially staggered manner. 4. The fluff yarn processing method according to claim 2, wherein the rotary disc of the false-twisted friction body is made of urethane. 5. A yarn speed ratio obtained by dividing the peripheral speed at the portion where the rotary disc of the friction false-twist body comes into contact with the lower twist multifilament yarn by the feed speed of the lower twist multifilament yarn. , 1.5 or more. 3.
Or method for producing fluff yarn according to any one of claims 4. 6. A plurality of ply-twisted multifilament yarns
Place each bobbin to be wound, and from each of these bobbins
A plurality of ply-twisted multifilament yarns are sandwiched by the sandwiching means.
And supply them to one friction false-twisted body in a state of being aligned.
The method for producing a fluff yarn according to claim 1, wherein 7. A yarn detector for individually detecting yarn breakage of a plurality of ply-twisted multifilament yarns delivered from each bobbin before they are aligned with each other.
Claim, characterized in that the yarn cutting means for cutting upstream of the applying position of the delivery driving the lower twisted multifilament yarn remaining is provided when the yarn breakage is detected by the yarn detector 6 A method for producing the fluff yarn described .