JPH08337937A - Processed filament yarn having fluff like spun yarn and its production - Google Patents

Abstract

PURPOSE: To obtain a processed filament yarn having fluffs and bulkiness like those of a spun yarn and imparting a soft and gentle high quality touch feeling when a woven or knitted fabric is prepared from it. CONSTITUTION: This processed filament yarn YK having 4.7-6g/d yarn strength and fluffs A, B like a spun yarn is obtained by performing a final twisting to plural multi-filament yarn Y having a primary twisting, forming the part of monofilaments constituting the multi-filament yarn Y of a short fiber, projecting the short fibers as fluffs A, B, at least one end of which are restricted by the primary or final twists and having 100-400 fluffs/m with 1-5mm length whose >=30 fluffs/m have >=1.5-5mm length. Since this processed filament yarn has a higher strength than those of conventional spun yarns or fluff-processed filament yarns and a spun yarn like touch feeling, it can be used as a sewing thread excellent in high speed sewing capability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processed yarn comprising a synthetic fiber multifilament yarn, which has the fluff and bulkiness that a spun yarn has, and has a soft and moist high-class feel when formed into a woven fabric. The manufacturing method is related.

[0002]

2. Description of the Related Art Conventionally, many attempts have been made to impart fluff and bulkiness to a synthetic fiber multifilament yarn, which is the same as that of a spun yarn, and there have been many proposals for fluffed filament yarn. Conventional fluffed filament yarns are obtained by a method of temporarily twisting or twisting while rubbing a multifilament yarn with a blade, but this method causes the blade to wear over time, so the yarn longitudinal direction However, there was a defect that the number of fluffs and the yarn strength of the yarns changed with time and the yarn streaks became uneven.

As a fluffed filament yarn for solving such non-uniformity, JP-A-3-64546 discloses a multifilament yarn having a lower twist and an upper twist, wound around a guide, and headed to this guide. A fluffing method has been proposed in which the yarns on the outward path and the yarns on the return path are crossed and twisted and ironed to both yarns. However, although the fluff yarn obtained by this method can improve the above-mentioned changes in the number of fluffs and the yarn strength in the longitudinal direction of the yarn over time, the fluff length is as short as 1 mm or less, and thus the bulkiness is not sufficient, so that the woven fabric can be obtained. When I did, I couldn't get a soft, moist and luxurious feel. Further, since the cross-filament treatment is performed on the multifilament yarn after the lower twist and the upper twist, sufficiently high yarn strength cannot be obtained.

Further, when the conventional fluffed filament yarn described above is used as a sewing thread, there are the following problems. BACKGROUND ART Conventionally, cotton thread has excellent sewability and is widely used not only as a household thread but also as an industrial thread. However, the strength is weak and the dyeing fastness is not sufficient.
Further, it has a drawback that it is easily affected by dimensional changes and the tailoring of the seams is poor. On the other hand, polyester spun threads, which occupy more than half of the sewing thread market, have sewability similar to cotton, are strong, and have good dyeing fastness and dimensional stability. There is a large variation and there are quality problems such as the presence of knots. Furthermore, it is not actually used for sewing high-quality clothes because of its poor appearance.

On the other hand, a sewing thread made of silk, polyester or polyamide filament thread is widely used as a sewing thread for covering the drawbacks of cotton or polyester spun thread. A conventional filament sewing thread is manufactured by aligning a plurality of twisted single threads and applying an upper twist, and physical properties according to the fineness of the single thread and the total fiber fineness of the sewing thread are obtained, and stable quality is obtained. Have.

However, the conventional filament sewing thread can be sewn without any problem in normal sewing, that is, in forward sewing with a lockstitch sewing machine, but in backward sewing, a force is applied in the direction in which the upper twist of the sewing thread is untwisted, and therefore twisting occurs. There is a fatal drawback that the thread breaks and it cannot be applied to automatic machine sewing with a high ratio of reverse stitching. Further, when high-speed sewing is performed with an industrial sewing machine, thread breakage is likely to occur due to heat of the sewing machine needle and penetration resistance to the cloth due to the large abrasion resistance of the side surface of the filament sewing thread.

[0007] Therefore, there have been proposed some sewing threads that improve the drawbacks of the conventional span sewing thread and filament sewing thread. Japanese Patent Publication No. 63-3977 proposes a core-sewn thread having a core-sheath structure of a filament and a span, and JP-A-2-33341 proposes a sewing thread having improved sewability by intertwisting the span and the filament. . However, these sewing threads have a drawback that they become knots or threads having uneven thickness due to the spinning process, and the threads are easily broken during sewing.

To improve the sewability by making a filament-processed thread such as a spun thread in which a filament is subjected to a fluid processing to give a loop, it is disclosed in Japanese Patent Laid-Open No. 10473/1990.
No. 3 and Japanese Patent Application Laid-Open No. 5-106134. However, compared to the span or the mixed sewing yarn of the span and the filament, the sewing thread made of the processed thread of the filament has a problem that the high-speed sewability is insufficient and the tailoring appearance is poor.

Further, in order to improve the drawbacks of the conventional fluffed filament processed yarn, the present applicant provides a filament processed yarn such as a spun yarn by fluffing using a yarn-yarn self-rubbing treatment. First, Japanese Patent Laid-Open No. 1-272
840, JP-A-2-91236, JP-A-2
-216233, JP-A-3-27144,
It was proposed in JP-A-3-64546 and JP-A-4-91245.

However, although these filament processed yarns can improve the uniformity of fluff in the yarn length direction, they are not sufficiently satisfactory as filament processed yarns having fluff and bulkiness such as spun yarns. There wasn't.

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to provide a fluff and bulkiness that a spun yarn has, and to give a soft and moist high-class feel to a woven fabric. It is an object of the present invention to provide a filament processed yarn having various fluffs and a method for producing the same.

[0012]

The spunlike fluff yarn of the present invention which achieves the above object has the following constitution. That is, a plurality of multifilament yarns having a lower twist are aligned and subjected to an upper twist, a part of the single filaments constituting the multifilament yarn is made into a short fiber, and at least one end of the short fiber is A fluff yarn that is restrained by a lower twist or an upper twist and protrudes as fluff on the surface of a yarn, and the fluff having a length of 1 to 5 mm is 100 to 4
The number of fluffs is 00 / m, and the number of fluffs having a length of 1.5 to 5 mm is 30 / m or more, and the yarn strength is 4.7.
It is a filament-processed yarn having fluff like a spun yarn which is ˜6 g / d.

The length of such fluff is 1 to 5 mm,
In addition, since it has a large number of fluffs having a length of 1.5 to 5 mm, it has the fluff and bulkiness that a spun yarn has, and when it is made into a woven fabric, it can give a soft, moist and high-class feel. The method for producing the spun-like fluff yarn has the following configuration. That is, a plurality of multifilament yarns that have been given a lower twist in the lower twist process are aligned and wound around a guide in a reciprocating manner, and the yarns on the outward path and the yarns on the return path are crossed with each other to twist and iron. And a fluffing process, and then the fluffed multifilament yarn is subjected to an upper twist in an upper twisting step, which is a method for producing a filamentized yarn having a fluff like a spun yarn.

As described above, since the multifilament yarns at the stage of the lower twist are subjected to the interlacing treatment in a state where two or more yarns are aligned, and then the upper twist is applied, it is easy to give relatively long fluff. In addition, high yarn strength can be obtained. The filament-processed yarn according to the present invention has 100 to 400 fluffs having a length of 1 to 5 mm, and the number of fluffs having a length of 1.5 to 5 mm is 30 or more fluff, and the yarn is extremely large. The strength is as high as 4.7 to 6 g / d, and as shown in Comparative Example 3 in FIG. 2, it is extremely close to the fluff and texture that a normal spun yarn has.
Therefore, when it is used for clothing, it can exhibit a soft, moist and high-quality texture.

Further, the yarn strength is higher than that of the spun yarn,
Since the thread lines are uniform, when used for a sewing thread or a sewing thread, the strength of the seam is improved and the seam is less likely to be broken. Furthermore, this sewing thread is a sewing thread made of filament thread, which is capable of not only automatic machine sewing, that is, forward sewing as well as backward sewing, but also high-speed sewability. is there.

The filament processed yarn of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a filament-processed yarn having fluff like a spun yarn according to the present invention. Y _K represents a filament-processed yarn having fluff like a spun yarn, Y represents a multifilament yarn having a lower twist, and A and B represent fluff, respectively.

In FIG. 1, a filament-processed yarn Y _K having a fluff like a spun yarn has a structure in which a plurality of multifilament yarns Y having a lower twist are aligned and twisted with an upper twist. There is. Each multifilament yarn Y is a multifilament composed of a plurality of monofilaments, and a part of the monofilaments is randomly cut in the longitudinal direction to be short fibers. The ends of these short fibers are restrained by the lower twist and the upper twist,
There is also one in which one end is open to the yarn surface and protrudes to form a fluff A, and another end protrudes like a loop into the yarn surface to form a fluff B. It is preferable that each of the fluffs A and B has no crimp and has a substantially straight shape.

Fluffs A and B protruding on the surface of the fluff yarn Y _K
Has 100 to 400 fluffs with a length of 1 to 5 mm.
The number of fluffs is 30 pieces / m or more and has a length of 1.5 to 5 mm. Like this, fluffy yarn Y
_K has a fluff length of 1 to 5 mm, 100 fluff / m or more, and a relatively long fluff of 1.5 to 5 mm, 30 fluff /
The presence of a large number such as m or more makes it possible to obtain an extremely soft hand feeling closer to a spun yarn, which cannot be obtained by the conventional fluffed filament-processed yarn proposed in JP-A-3-64546. It will have a spanlike texture.

The characteristics of the fluff of the filament processed yarn according to the present invention will be described in detail with reference to FIG. Figure 2
Example 1 which is an example of a filament-processed yarn having fluffs such as spun yarn according to the present invention (filament-processed yarn obtained in Example 1 described later), and Comparative Example 1 which is a conventional fluff-processed filament-processed yarn ( The filament processed yarn obtained in Comparative Example 1 described below), Comparative Example 2 (filament processed yarn obtained in Comparative Example 2 described later) which is another example of the conventional fluffed filament processed yarn, and the spun yarn (Comparison) Example 3, Toyobo Co., Ltd. spun thread, C100 # 6
0) shows the relationship between the length and the number of fluffs.

Incidentally, FIG. 2 was obtained by measurement using a HAIRNESS COUNTER MODEL DT-104 manufactured by Toray Engineering Co. at a yarn traveling speed of 60 m / min. In FIG. 2, the total number of fluffs having a length equal to or larger than the value shown on the horizontal axis is represented as the number of fluffs on the vertical axis. As can be seen from FIG. 2, the number of fluffs having a fluff length of 1 mm or more is 160 / m for the spun yarn of Comparative Example 3, 140 / m for the example of the filament processed yarn of the present invention (Example 1), and Comparative Example 1 And Comparative Example 2 is 3
The level is 0 / m or less. Furthermore, fuzz length is 1.5 mm
The number of fluffs is 50 / m for the spun yarn of Comparative Example 3 and the invention example (Example 1), whereas it is 5 / m or less for Comparative Example 1 and Comparative Example 2.

That is, the distribution of fluff in the filament processed yarn according to the present invention is, as shown in FIG. 2, the number of fluffs having a fluff length of 1 mm or more is very close to that of the spun yarn, and thus the filament yarn is processed. Although it is a yarn, it is considered that the yarn has the texture of a spun yarn. The number of fluffs as used herein means fluffs (such as fluff A) whose ends are cut off and are projected on the yarn surface as described above, and the ends do not appear on the yarn surface. It refers to the total number of fluffs (such as fluff B) forming loops and all the talumi. More specifically, the total number of fluff is HAIRNESS C manufactured by Toray Engineering Co., Ltd.
It can be obtained by measuring with a yarn traveling speed of 60 m / min using OUNTER MODEL DT-104.

When the number of fluffs having a fluff length of 1 to 5 mm is less than 100 / m and the number of fluffs having a length of 1.5 to 5 mm is less than 30 / m, a texture like a spun yarn cannot be obtained. Further, if the number of fluffs is more than 400 pieces / m, it causes a problem such as pilling when used in a woven or knitted fabric, or causes poor needle passage when used as a sewing thread. Come to do.

The filament-processed yarn Y _K having fluff such as the spun yarn has a high yarn strength because the fluff is applied to the multifilament yarn in the lower twisting step, as described in the manufacturing method described later. And cut strength to 4.
It has 7 to 6 g / d. Due to the high thread strength as described above, high-speed sewability and automatic sewability can be extremely improved especially when used for sewing threads.

Generally, a high-strength type filament yarn that has not been fluffed (twisted yarn that has been twisted and twisted) has a breaking strength of 6 to 7 g / d. Sewability and automatic sewability are extremely poor. The reason for this is that since it has no fluff, the frictional resistance between the yarn and the needle is high, which increases the heat generation of the needle, and the heat causes melting and frequent yarn breakage. The strength as used in the present invention is measured according to JIS L-1073.

The plurality of multifilament yarns constituting the filament processed yarn having fluff such as the spun yarn of the present invention have a different single fiber fineness from the case where they are made up of filament groups having the same single fiber fineness. In some cases, at least two types of filament groups are combined and configured. In the case of the above multifilament yarn,
In the latter multifilament yarn, the filament group with a small single fiber fineness is selectively made into a short fiber and the filament with a large single fiber fineness is obtained, while the filament group is uniformly shortened by the fluffing. The group is characterized by almost no short fibers. Therefore, in the case of the latter multifilament yarn, a filament group having a small single fiber fineness is mainly made into a short fiber and the number of fluffs, and a filament group having a large single fiber fineness strongly acts on each, resulting in a large number and a high number of fluffs. It is possible to hold strong.

Examples of the case where the multifilament yarn is composed of two kinds of filament groups having different single fiber fineness are, for example, a single fiber fineness of a filament group having a small single fiber fineness of 0.1 to 1.5 denier, a single fiber. The single fiber fineness of the filament group having a large fineness may be combined in the range of 3.5 to 10 denier, and the denier difference thereof is preferably 2 denier or more.

The number of filaments constituting the multifilament yarn is 30 from the viewpoint of obtaining a woven or knitted fabric having a soft and moist feel by expressing sufficient fluff.
The number is preferably not less than 300, and is preferably not more than 300 per multifilament yarn from the viewpoint of preventing the occurrence of nep on the yarn surface and the disorder of the yarn surface.

The material of the filament yarn that constitutes the filament-processed yarn having fluff such as the spun yarn of the present invention is not particularly limited as long as it is a synthetic fiber, but is preferably a thermoplastic such as polyester or nylon. It is preferable to use a synthetic fiber filament yarn and a high tenacity type with low elongation. The total fiber fineness of the multifilament yarn is preferably 50 to 500 denier. In the case of sewing thread, it is preferable that the total fiber fineness of the multifilament thread is 100 to 300 denier and the number of filaments is 50 to 250.

The cross-sectional shape of the monofilament is generally circular, but when used for clothing, it is triangular or Y.
It may have an irregular cross section such as a shape, a pentagon, a hollow, or a flat shape. Also, special types such as high gloss and low gloss can be used. In addition, in the case of a multifilament yarn configuration, when the filament group is composed of at least two types of filaments having different single fiber fineness, the difference in yarn strength between the short fiber and the non-short fiber is determined as described above. Although it may be obtained by providing a difference in fineness, the single fiber fineness may be the same and a difference in strength or a difference in elongation may be obtained depending on the material of the single filament and the processing method.

The number of filament groups having different single fiber fineness is preferably two or three, but may be four or more. From the viewpoint of productivity, it is preferable that the two or more kinds of filament groups having different single fiber finenesses are melt-spun from the same polymer in the same spinneret in the spinning step,
The filament group having a small single fiber fineness and the filament group having a large single fiber fineness may be spun separately and then combined.

Next, a method for producing a filament-processed yarn having fluff like the spun yarn of the present invention will be described.
A plurality of twisted multifilament yarns are reciprocally wound around a draw-align guide, and the yarns on the outward path toward the guide and the yarns on the return path are interlaced and fluffed. Try to twist the filament yarn. In particular, it is important to give a strong twist and ironing at the same time in the state of being provided with a plurality of twisted yarns to fluff.

As a twisting machine for giving a lower twist in the lower twisting step, a twisting machine called an up twister, a covering machine, an iterative twisting machine, a down twister, a double twister or the like can be used. Also, when fluffing is performed using these twisting machines, a plurality of yarns that have been released by vertical or horizontal removal of the twisted yarns are pulled out, and the yarns are being aligned or before winding. Is to be carried out in the traveling part.

FIG. 3 shows an example of a process in which three twisted yarns are aligned by an up twister and continuously fluffed. In FIG. 3, 1a, 1b and 1c are bobbins, 2a, 2b and 2c are spindles, 3 is a belt, 4a, 4b and 4c are feed rollers, 5 is a guide roller and 6 is a feed roller. Is cheese, 8 is a take-up roller, 9 is a guide roller, 10 is a pin, 11 is a guide roller, and Ya, Yb, and Yc are multifilament yarns having a lower twist.

The multifilament yarns Ya, Yb, Yc wound on the bobbin are wound on the bobbins 1a, 1b, 1c, set on the spindles 2a, 2b, 2c, and rotated by the belt 3. There is. Multi-filament yarn Ya, Y while rotating the spindle
When b and Yc are pulled out in the axial direction of the bobbins 1a, 1b and 1c, the multifilament yarns Ya, Yb and Yc
To the feed rollers 4a, 4b, 4c, a lower twist is added in the S direction or the Z direction, and then the lower twist is inserted.
While a, Yb, and Yc are aligned, the guide roller 5 and the pin 1 are tightened while being tensioned between the upper feedlohira 6 and
0 is fluffed by a yarn-yarn self-rubbing device composed of 0.

FIG. 4 shows a yarn used in the method for producing a filament-processed yarn having fluff like a spun yarn according to the present invention.
It is an external view which shows an example of a thread self-rubbing device. Y _O is a yarn of forward path, the Y _O 'is the backward side yarn, P is shows the interlacing point of the yarn. In this fluffing, as shown in FIG. 4, when the multifilament yarns Ya, Yb, and Yc are reciprocally wound around the guide roller 5, the yarn Y _O on the outward path toward the guide roller 5 and the yarn on the return path returning to the guide roller 5. Pin 10 with Y _O '
At the crossing point P, both yarns Y _O , Y _O '
When a strong twist and ironing are applied to the filaments, a part of the monofilament group constituting the multifilament yarns Ya, Yb, Yc is made into short fibers to generate fluff.

The multifilament yarns Ya, Yb, and Yc that have generated fluffs in this way are wound around the cheese 7 from the feed roller 6 through the take-up roller 8 (see FIG. 3). This cheese 7 is then hung on the upper twisting machine to apply the upper twist. The fluff processing is, as shown in FIG.
The thread itself is rubbed by itself. In the example shown in FIG. 4, the forward yarn Y _O is crossed with the backward yarn Y _O 'as shown in FIG. 4 to give a twist of about 90 °, and the backward yarn Y _O 'Is also twisted by about 90 ° by intersecting the yarn Y _O on the outward path. Therefore,
When the multifilament yarn passes back and forth through the intersecting point P, a total twist of about 180 ° is given.

Further, in this fuzz processing, in order to stabilize the twisting and ironing action at the intersection point P, it is preferable to arrange the pin 10 or the roller as shown in FIG. 4 inside the intersection point P. . More preferably, the guide roller 9 or pin as shown in FIG. 4 is arranged on the supply side of the intersection P, and the guide roller 11 or pin is arranged on the exit side. If the exit side roller 11 or pin is moved in the direction of the arrow so as to cross the yarn path, and the entry / exit angle θ formed by the entry side and the exit side of the yarn is adjusted, the degree of twisting and ironing can be changed. It is possible to adjust the number of fluffs.

It is preferable that the tension at the time of performing the rubbing treatment by this crossing is 0.3 g / d or more on both the return path side and the outward path side. Also, the twist imparted by crossing is
θ is 180 ° or more, preferably 360 ° or more. By imparting a twist of θ of 180 ° or more, it is possible to bring a half or more of the outer circumference of the yarn into contact with the yarn of the mating side for rubbing treatment.

The twisting direction of the crossing may be either S or Z, but from the viewpoint of increasing the number of fluffs, it is preferable to twist and twist in the same direction as the downward twist direction. Further, the fluff length can be shortened by inserting a large number of lower twists and lengthened by inserting a small number. By such adjustment, the length of the fluff is adjusted to be in the range of 1 to 5 mm. In performing such a rubbing treatment, the productivity is improved while preventing brittleness of the filament due to large frictional heat generated by rubbing, reduction in yarn strength due to scraping, light dyeing of the rubbed portion, or generation of white powder. From this point of view, the yarn traveling speed is preferably 3 to 100 m / min.

FIG. 5 is a process chart showing an example of a manufacturing method according to the present invention when a down twister is used. In FIG. 5, 12 is a feed roller, 13 is a fluff processing device, 14 is a feed roller, and 15 is a bobbin.
Reference numeral 6 indicates a spindle. In FIG. 5, the multifilament yarns Ya, Yb, and Yc once wound on the winding bobbin with the lower twist are released by the weft removing method, and are taken up by the feed roller 12 while being aligned.
Then, between the continuous feed rollers 12 and 14, fluffing is performed by the yarn-yarn self-rubbing device 13 under tension. Next, the fluffed multifilament yarns Ya, Yb, Yc are wound around the bobbin 15 from the feed roller 14 while the spindle 16 is being rotated, so that the fluffed spun yarn-like filament according to the present invention is processed. Yarn is obtained.

FIG. 6 is a process drawing showing an example of the manufacturing method according to the present invention when the lower twist and the upper twist are continuously carried out on the same twisting machine. In FIG. 6, 17a, 17b, 1
7c is a spindle, 18 is a belt, 19 is a guide, 20 is a guide, 21 is a feed roller, 22 is a thread-thread self-rubbing device, 23 is a feed roller, 24
Is a bobbin, 25 is a belt, and 26 is a spindle.

In FIG. 6, the multifilament yarns Ya, Yb, and Yc wound on the bobbin are twisted downward by the spindles 17a, 17b, and 17c driven by the belt 10 to form the yarns Ya, Yb, and Yc. While being aligned, they are taken up by the feed roller 21 via the guides 19 and 20. The fluffing is performed by the yarn-yarn self-rubbing device 22 under tension between the continuous feed rollers 21 and 23. The fluffed multifilament yarns Ya, Yb, and Yc are wound from the feed roller 23 onto the bobbin 24 while the spindle 26 is being rotated by the drive of the belt 25, so that the fluff like the spun yarn according to the present invention is obtained. It is possible to obtain a filament-processed yarn having the same.

In the production method of the present invention, the number of lines to be aligned in the lower twisting step before giving the upper twist may be two or more, but it is preferably 2 to 7, from the viewpoint of improving the balance. More preferably, the number is 2 for clothes and 3 or 7 for sewing threads. Also,
The lower twist numbers of the multifilament yarns to be aligned may be different from each other, and the lower twist directions may be different from each other.

Regarding the relationship between the upper twist number and the lower twist number, it is possible to set the twist direction and the twist number so as to maintain the balance of the twist torque when the filament processed yarn having fluff like the spun yarn of the present invention is maintained. Preferably, the lower twist direction and the upper twist direction are directions opposite to each other, and the upper twist number is preferably 60% to 90% of the lower twist number. When the filament-processed thread according to the present invention is used as a sewing thread or a sewing thread, from the viewpoint of obtaining sufficient sewability with good convergence as the sewing thread or the sewing thread, the lower twist number is expressed as a twist coefficient. It is preferable to give the coefficient k of 4000 or more. On the other hand, from the viewpoint of preventing the sewing thread or the sewing thread from becoming hard and reducing the twisting cost,
The lower twist is preferably provided so that the twist coefficient k is 12,000 or less. Where the twist coefficient k is TD
^1/2 (T: number per 1 m, D: fineness). It is more preferable that the twist coefficient k of the lower twist is in the range of 7,000 to 11,000. The upper twist is preferably 60 to 90% of the lower twist number in the Z direction. Usually, a sewing thread or a sewing thread is twisted with a base thread, and then twisted and set as needed, and then dyed and finished. Dyeing is generally carried out in skein roll or cheese form.

The sewing thread or the sewing thread using the filament-processed thread of the present invention is not limited in the count, that is, the thickness of the sewing thread, but it is # 80 (40) for clothing.
Denier's triplets, # 60 (50 denier's triplets), # 50 (70 denier's triplets) can be used as general-purpose sewing thread or sewing thread, and thicker than this can be used for industrial materials. . The number of filaments of the raw yarns forming the sewing thread or the sewing thread may be appropriately set according to the thickness of the single fiber.

[0046]

EXAMPLES In the examples, the fiber length and the number of filament-processed yarns (FIGS. 7 and 8) were measured as follows. That is, a central point of a sewing thread having a length of 300 mm is grasped, and twist of the sewing thread is untwisted and disassembled. Then, the single fiber which was not grasped was pulled out and removed. The remaining single fibers after gripping one point were arranged one by one according to the thickness of the fiber, and the length was measured to create a histogram of the length and the number of single fibers for every 25 mm.

The sewability evaluation of the sewing thread (Table 1) in the examples shows the following evaluation results. In Table 1, Comparative Example 3 is a spun thread sewing thread (Toyobo Co., Ltd. sewing thread C100 # 60), and Comparative Example 4 is a non-fluffed filament thread sewing thread (Toray Co., Ltd. sewing thread PET70D /
This is an evaluation of 3-48f). (A) Back stitchability (%) vs. spun thread Using a lock stitch machine, 400 layers of four cotton broad layers are overlapped.
Back stitching at 0 spm and the length until the thread is cut (m)
Was expressed as a ratio (%) with the spun yarn being 100. The sewing machine used here is JUKI DLU-491-5.
, The sewing machine needle is organ DB-1 # 11. (B) High-speed sewability (%) vs. spun thread Using a lockstitch sewing machine, 400 sheets of eight cotton broad layers are stacked.
The length (m) until the sewing thread was cut up was sewn up at 0 spm and expressed as a ratio (%) when the span thread was 100. The sewing machine used here is JUKI DLU-491-5.
, The sewing machine needle is organ DB-1 # 11. (C) Thread strength retention after sewing (%) The sewing thread after sewing was unraveled and the strength retention relative to the original thread was expressed. Example 1 A high-strength type polyester multi-filament yarn (70 denier-48 filaments, single fiber fineness 1.46 denier) having 7.5 g / d was prepared according to a lower twisting process using an up twister as shown in FIG. , S direction 9
The yarn is twisted under 66 T / m, three yarns are drawn and aligned (210 denier-144 filaments), the yarn traveling speed is 10 m / min, the outgoing route side is 160 to 175 g, and the return route side is 400 to
It is wound around the guide roller 5 under a tension of 425 g, and by twisting the yarn on the outward path and the yarn on the return path in the S direction which is the same direction as the lower twist, twist and ironing of about 360 ° are given. Fluffed.

Then, the obtained fluffed yarns of three yarns in the aligned state are 709 T / m in the Z direction with a down twister.
Was twisted to prepare a filament processed yarn. The characteristics of this filament processed yarn were as follows. Number of fluffs with a fuzz length of 1 to 5 mm 185 / m Number of fluffs with a fuzz length of 1.5 to 5 mm 60 / m Strength 1120 g (strength 4.9 g / d) In the above fluff processing, filaments are shown in FIG. Like the fiber length and the number of fibers, all 48 fibers were made into short fibers, but the number of filaments of each short fiber was relatively uniform.

When the filament processed yarn having fluff like the spun yarn was used to form a plain woven fabric, a woven fabric having a soft, moist and high-grade hand touch was obtained. On the other hand, in order to process the filament processed yarn having fluff like this spun yarn for sewing machine yarn, after dry heat treatment at 180 ° C, soft-winded cheese is dyed with high pressure cheese and rewound on a bobbin for sewing machine yarn and finished. It was
As a result, no difference in dyeing on the bobbin for the sewing thread was observed with the naked eye, and when the sewability by the high-speed automatic sewing machine was evaluated, the high-speed sewability and the automatic sewability were good, and the stitches after the sewing were finished. It looked good. Table 1 shows the results of evaluation of the sewability.

[0050]

[Table 1] Example 2 Regarding the relationship between the number of fluffs and the strength, the same filament yarn as in Example 1 was used, the lower twist number, the upper twist number and the yarn running speed were made the same, and only the degree of tension of the feed roller was changed to Tension is 210-238g, 134-141g
And fluffing were performed to set filaments, and a filament-processed yarn having fluff like a spun yarn was produced. The characteristics of this filament processed yarn were as follows.

Spun-like fluff yarn having a tension of 210 to 238 g on the outward path, the number of fluffs having a fluff length of 1 to 5 mm 395 / m, the number of fluffs having a fluff length of 1.5 to 5 mm, 82 pieces / m, the strength 990 g (strength 4.7 g). / D) Spunlike fluff yarn having a tension on the outward side of 134 to 141 g. Number of fluffs having a fluff length of 1 to 5 mm 105 pieces / m. Number of fluffs having a fluff length of 1.5 to 5 mm 31 pieces / m. Strength 1269 g (strength 5.4 g). / D) The filament processed yarn having fluff like this spun yarn was evaluated as a sewing machine yarn in the same manner as in Example 1. As a result, the high speed sewability and the automatic sewability were good, and the finished seams looked good. Was good. Example 3 As in Example 1, according to the lower twisting process using an up twister as shown in FIG. 3, a polyester multifilament yarn 70 denier-42 filaments (single fiber fineness 6 denier) consisting of filament groups with different single fiber fineness 6 filaments and 36 filaments with a single fiber fineness of 1 denier) are twisted downward in the S direction at 966 T / m, and the yarn running speed is 10 m while aligning these yarns into 3 yarns.
/ Min, outgoing route side 163-172g, return route side 410-436
The yarn was wound around a guide roller under a tension of g, and the yarns on the outward path and the yarns on the return path were crossed in the S direction to give a twist of about 360 degrees and ironing for fluffing.

Then, the obtained fluff yarn was twisted by 709 T / m in the Z direction with an up twister to prepare a filament processed yarn having fluff like a spun yarn. The characteristics of this filament processed yarn were as follows. Number of fluffs with fuzz length of 1 to 5 mm 212 / m Number of fluff with fuzz length of 1.5 to 5 mm 48 / m Strength 1240 g (strength 5.5 g / d) In the above fluff processing, the filaments are as shown in FIG. In addition, although 6 filaments each having a single fiber fineness of 6 denier were not made into short fibers per decomposed yarn, all 36 filaments having a short fiber fineness of 1 denier were made into short fibers.

When a filament woven fabric having a fluff like the obtained spun yarn was used to form a plain woven fabric, a woven fabric having a soft and moist feel and a firm and firm texture was obtained. When a filament-processed yarn having fluff such as this spun yarn was evaluated as a sewing machine yarn, it was found that the high-speed sewability and the automatic sewability were good, and the appearance of the finished seams was good. Note that, in Example 2, as compared with Example 1, the number of fluffs was large and the strength was high under the same fluffing conditions. Comparative Example 1 According to a lower twist process using an up twister as shown in FIG. 3, a polyester multifilament yarn of 70 denier-48 filaments is subjected to a lower twist of 966 T / m in the S direction, and three yarns are aligned and aligned. 709T in Z direction
/ M, twisting speed is 10m / min, forward side 1
12-124g, 290-320g on the return path side, it is wound around the guide roller, and the thread on the outward path and the thread on the return path are crossed in the S direction to twist and iron about 360 degrees. Filament processing was performed to produce filament processed yarn. The characteristics of this filament processed yarn had the fluff presence distribution shown in Comparative Example 1 of FIG. 2, and were as follows.

Number of fluffs having a fluff length of 1 to 5 mm 5 / m Number of fluffs having a fluff length of 1.5 to 5 mm 0 / m Strength 1000 g (strength 4.5 g / d) In the above fluff processing, 48 filaments were used. Although the number of filament yarns was short, the number of filament yarns of each fiber length was not uniform and many filament yarns of long fiber length were used.

When the obtained fluff yarn was used to form a plain woven fabric, the touch had a texture with a strong slimy feel like a filament yarn of raw silk. Moreover, when this filament processed yarn was evaluated as a sewing yarn, the sewability was lower than in Examples 1 to 3. Table 1 shows the results of evaluation of the sewability. Comparative Example 2 One polyester multifilament yarn of 70 denier-48 filaments was made into 660T / S direction by following the lower twisting process using an up twister as shown in FIG.
The twisting speed is 10 m / min.
〜38g, 120 ~ 143g on the return path side, it is wound around the guide roller under high tension, and the yarns on the outward path and the yarns on the return path are crossed in the S direction to twist and iron about 360 degrees. The fluff was applied.

Then, the obtained filament processed yarn is
This filament was aligned and twisted in the Z direction by 709 T / m to prepare a filament processed yarn. The characteristics of this filament processed yarn have the fluff presence distribution shown in Comparative Example 2 of FIG.
It was as follows. Number of fluffs with a fluff length of 1 to 5 mm 45 / m Number of fluffs with a fluff length of 1.5 to 5 mm 4 / m Strength 1015 g (strength 4.6 g / d) In the above fluff processing, 48 filaments were shortened However, the number of filament yarns of each fiber length was not uniform, and many filament yarns of long fiber length were used.

When a plain woven fabric was formed using the obtained filament processed yarn, it had a texture with a strong slimy feel like that of raw filament yarn. Moreover, when this filament processed yarn was evaluated as a sewing yarn, the sewability was lower than in Examples 1 to 3. Table 1 shows the results of evaluation of the sewability.

[0058]

Industrial Applicability The filament processed yarn having fluff like the spun yarn of the present invention has the fluff and bulkiness that the spun yarn has, and has a soft, moist and high-class feel when formed into a woven or knitted fabric. Can be given. Further, since it has a higher yarn strength than the conventional spun yarn or fluffed filament processed yarn and has a texture like a spun yarn, it can be used as a sewing thread having excellent high-speed sewability.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a filament processed yarn having fluff like a spun yarn according to the present invention.

FIG. 2 is a graph showing the relationship between the fluff length and the number of fluffs for each yarn of the present invention and the comparative example.

FIG. 3 is a process drawing showing an example of the case where an up twister is used in the manufacturing method according to the present invention.

FIG. 4 is a process drawing showing an example in which a yarn-yarn self-rubbing device is used in the manufacturing method according to the present invention.

FIG. 5 is a process drawing showing an example of the case where a down twister is used in the manufacturing method according to the present invention.

FIG. 6 is a process drawing showing an example in which the lower twist and the upper twist are continuously carried out on the same twisting machine in the manufacturing method according to the present invention.

FIG. 7 is a graph showing a fiber length distribution of an example of a filament processed yarn having fluff like a spun yarn according to the present invention.

FIG. 8 is a graph showing a fiber length distribution of another example of a filament-processed yarn having fluff such as a spun yarn according to the present invention.

[Explanation of symbols]

Y _K : Filament processed yarn having fluff like spun yarn Y, Ya, Yb, Yc: Multi-filament yarn with a lower twist A, B: Fluff 1a, 1b, 1c: Bobbin 2a, 2b, 2c: Spindle 3: Belt 4a, 4b, 4c: Feed roller 5: Guide roller 6: Feed roller 7: Cheese 8: Take-up roller 9: Guide roller 10: Pin 11: Guide roller 12: Feed roller 13: Thread-thread self-rubbing Device 14: Feed roller 15: Bobbin 16: Spindle 17a, 17b, 17c: Spindle 18: Belt 19, 20: Guide 21: Feed roller 22: Thread-thread self-rubbing device 23: Feed roller 24: Bobbin 25: Belt 26: spindle

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location D02J 1/16 D02J 1/16 3/02 3/02 Z (72) Inventor Masashi Kojima Shiga 1-1-1, Oe, Otsu City, Tochi, Ltd. Inside Seta Plant, Toray Co., Ltd. (72) Inventor, Yoshikazu Tsuji 1-1-1, Oe, Otsu City, Shiga Toray Co., Ltd.

Claims (4)

[Claims] 1. A plurality of multifilament yarns having a lower twist are subjected to an upper twist, a part of monofilaments constituting the multifilament yarn is made into a short fiber, and at least one end of the short fiber is made into a lower fiber. A fluff yarn that is restrained by twisting or twisting and protrudes as fluff on the yarn surface, and the fluff is 100 to 400 fluff with a length of 1 to 5 mm, and the length is 1.5 to 5 mm. The number of fluff is 30 / m or more, and the yarn strength is 4.7 to 6 g.
A filament-processed yarn having fluff like a spun yarn that is / d. 2. The multifilament yarn is 30 to 300.
It consists of at least two monofilament groups with different monofilament fineness,
The filament-processed yarn having fluff like a spun yarn according to claim 1, wherein the single filament group having the smaller single fiber fineness is mainly made into short fibers. 3. A plurality of multifilament yarns, which have been given a lower twist in the lower twist step, are aligned and wound around a guide in a reciprocating manner.
A span yarn in which the yarn on the outward path and the yarn on the return path are twisted and ironed by interlacing the yarns to be fluffed, and the fluffed multifilament yarns are then twisted in the upper twisting process. Of producing a filament-processed yarn having fluff such as. 4. The fluffing speed when the multifilament yarn is reciprocally wound around the guide is 3 to 100 m / mi.
The method for producing a filament-processed yarn having fluff such as spun yarn according to claim 3, wherein n is n.