JP3186508B2 - Filament processed yarn having fluff such as spun yarn and method for producing the same - Google Patents

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 having a fluff and bulkiness as spun yarn has, and a soft and moist high-grade feel when woven. It relates to the manufacturing method.

[0002]

2. Description of the Related Art Conventionally, there have been many proposals of attempts to impart the fluff and bulkiness of a spun yarn to a synthetic multifilament yarn, and to apply a fluff to the filament yarn. Conventional fluffed filament yarns are obtained by a method of temporary twisting or twisting while rubbing a multifilament yarn with a blade.However, this method wears the blade over time. However, there was a defect that the number of fluffs and the yarn strength in the above varied with time, and the yarn streaks became uneven.

Japanese Unexamined Patent Application Publication No. 3-64546 discloses a fluffed filament yarn which solves such non-uniformity. A multifilament yarn having a lower twist and an upper twist is wound around a guide and travels toward the guide. A method has been proposed in which the yarns on the outward path and the yarns on the return path are interlaced, and both yarns are twisted and ironed to perform fluffing. However, the fluff yarn obtained by this method can improve the number of fluffs in the yarn longitudinal direction and the change with time in the yarn strength, but the fluff length is as short as 1 mm or less, so the bulkiness is not enough, and the fluff is not suitable for fabrics. When I did, I couldn't get a soft, moist, high-class feel. Further, since the multifilament yarn after the lower and upper twists was subjected to the interlacing treatment, a sufficiently high yarn strength could not be obtained.

[0004] When the above-mentioned conventional fluffed filament yarn is used as a sewing thread, there is the following problem. Conventionally, cotton sewing thread has excellent sewability and is widely used not only for domestic sewing thread but also for industrial sewing thread. However, the strength is weak and the color fastness is not sufficient.
Furthermore, it has a disadvantage that it is susceptible to dimensional changes and the tailoring of the seam is poor. On the other hand, polyester spun thread, which accounts for more than half of the sewing thread market, has sewability close to cotton and has good strength, fastness to dyeing, and good dimensional stability. There is a quality problem, such as a large variation in knots and knots. Furthermore, it is a reality that high-quality clothing is not used for sewing due to poor appearance.

[0005] On the other hand, sewing threads made from filament yarns of silk, polyester, and polyamide are widely used as sewing threads covering defects of cotton and polyester spun sewing threads. Conventional filament sewing thread is manufactured by aligning multiple single yarns with lower twist and aligning them with upper twist, and the physical properties according to the fineness of the single yarn and the total fiber fineness of the sewing thread are obtained, stable quality Having.

[0006] However, the conventional filament sewing thread can be sewed without problems by normal sewing, ie, forward stitching with a lockstitch sewing machine, but in reverse stitching, a force is applied in the direction in which the upper twist of the sewing thread is untwisted. There is a fatal drawback that thread breakage occurs and cannot be applied to automatic machine sewing having a high ratio of backward stitching. Further, when sewing is performed at high speed with an industrial sewing machine, thread breakage is likely to occur due to the heat of the sewing needle and the penetration resistance to the fabric due to the high abrasion resistance of the side surface of the filament sewing thread.

[0007] In view of the above, several sewing threads have been proposed in which the drawbacks of the conventional spun sewing thread and filament sewing thread are improved. Japanese Patent Publication No. Sho 63-3977 proposes a core sewing thread having a core-sheath structure of a filament and a span, and Japanese Patent Laid-Open Publication No. 2-33341 discloses a sewing thread having improved sewability by twisting the span and the filament. . However, these sewing threads have knots and uneven thicknesses due to the spinning process, and have a disadvantage that the threads are liable to break during sewing.

Japanese Patent Application Laid-Open No. Hei 2-10473 discloses a method of improving the sewability by forming a filament-processed yarn such as a spun yarn obtained by subjecting a filament to a fluid processing to form a loop.
No. 3, JP-A-5-106134. However, compared with the spun yarn or the mixed suture of the spun and the filament, the sewing thread composed of the processed yarn of the filament has a problem that the uniform high-speed sewability is insufficient but the tailoring appearance is poor.

Further, in order to improve the drawbacks of the conventional fluffed filament-processed yarn, the applicant of the present invention has provided a filament-processed yarn such as spun yarn by fluffing using a yarn-yarn self-rubbing treatment. Is described in JP-A-1-272.
840, JP-A-2-91236, JP-A-2-91
-216233, JP-A-3-27144,
This has been proposed in Japanese Patent Application Laid-Open Nos. 3-64546 and 4-91245.

[0010] However, these filament-processed yarns can improve the uniformity of the fluff in the length direction, but are not sufficiently satisfactory as a fluff-like spun yarn or a bulky filament-processed yarn. Did not.

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to provide a spun yarn which has a fluff and bulkiness as spun yarn has and can give a soft, moist and high-grade feel when woven. An object of the present invention is to provide a filament-processed yarn having a fluff and a method for producing the same.

[0012]

The spun-like fluff of the present invention that 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 a single filament constituting the multifilament yarn is shortened, and at least one end of the short fiber is formed. A fuzz yarn restrained by a lower twist or an upper twist and projected as a fluff on the yarn surface, wherein the fluff has a length of 1 to 5 mm and a fluff of 100 to 4
00 / m, of which fuzz having a length of 1.5 to 5 mm is 30 / m or more, and the yarn strength is 4.7.
Filament processed yarn having fluff such as spun yarn of ６6 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 fluff and bulkiness as spun yarn has, and can give a soft and moist high-grade feel when woven. The method for producing a spun-like fluff yarn has the following configuration. In other words, a plurality of multifilament yarns provided with the lower twist in the lower twisting process are aligned and reciprocally wound around a guide, and the outward yarn and the return yarn are interlaced with each other, thereby torsion and ironing. And a fluffing process, and then applying the fluffed multifilament yarn in an upper twisting step to produce a filament-processed yarn having a fluff such as a spun yarn.

As described above, the multifilament yarns at the stage where the lower twist is applied are interlaced in a state where two or more yarns are aligned, and then the upper twist is applied. In addition, a high yarn strength can be obtained. The filament-processed yarn according to the present invention has an extremely large number of fluffs having a length of 1 to 5 mm of 100 to 400 pieces / m, of which 30 pieces / m or more have a length of 1.5 to 5 mm. The strength is as high as 4.7 to 6 g / d, and as shown in Comparative Example 3 in FIG. 2, it is very close to the fluff and texture of a normal spun yarn.
Therefore, when used for clothing, it is possible to present a high-grade texture with a soft, moist texture.

Further, the yarn strength is higher than the spun yarn,
Since the thread streak is uniform, when used for a sewing thread or a sewing thread, there is an advantage that the strength of the seam is improved and the seam is hardly broken. In addition, this sewing thread is a sewing thread which has automatic machine sewing, that is, not only forward sewing but also reverse sewing without any problem, in spite of a sewing thread made of a filament thread, and also has a high-speed sewing property. is there.

Hereinafter, the filament yarn of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a filament-processed yarn having a fluff such as a spun yarn according to the present invention. Y _K represents a filament yarn having fluff, such as spun yarns, Y represents a multifilament yarn twist is applied, A, B respectively indicate the fluff.

[0017] In FIG. 1, the filament yarn Y _K having fluff, such as spun yarns, multifilament yarns Y having a lower twist are taken to the configuration above twist was twisted subjected plurality pulling collated by I have. Each of the multifilament yarns Y is a multifilament composed of a plurality of single filaments, and a part of the single filament is randomly cut in the longitudinal direction to be a short fiber. The ends of these short fibers are restrained by lower and upper twists,
There are also ones that are open at one end to the yarn surface and protrude to form fluff A, and those that protrude to the yarn surface in a loop shape and become fluff B. It is preferable that each of these fluffs A and B has no crimp and has a substantially straight shape.

The fluff protruding surface of the fluff yarn Y _K A, B
The number of fluffs having a length of 1 to 5 mm is 100 to 400
And the number of fluffs having a length of 1.5 to 5 mm is 30 or more. The fluff Y
_K is fuzz having a fluff length of 1 to 5 mm is 100 pieces / m or more, and 30 fuzz having a length of 1.5 to 5 mm is relatively long;
m, the presence of a large number of m.m. or more makes it possible to obtain an extremely soft touch that is closer to a spun yarn and cannot be obtained with the conventional fluffed filament processed yarn previously proposed in JP-A-3-64546. It has a span-like texture.

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

FIG. 2 was obtained by measuring the yarn at a yarn traveling speed of 60 m / min using a HAIRNESS COUNTER MODEL DT-104 manufactured by Toray Engineering. In FIG. 2, the total number of fluffs having a length equal to or greater than the numerical 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 was 160 yarns / m for the spun yarn of Comparative Example 3, 140 yarns / m for one 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 1.5mm
The number of fluffs is 50 yarns / m for the spun yarn of Comparative Example 3 and the present invention example (Example 1), but 5 yarns / m or less for Comparative Examples 1 and 2.

That is, as shown in FIG. 2, the distribution of fluff in the filament-processed yarn according to the present invention is such that the number of fluffs having a fluff length of 1 mm or more is very close to the spun yarn, It is considered that the spun yarn has the feel of a spun yarn. In addition, the number of fluffs referred to herein means the fluff (such as fluff A) whose end is cut and opened on the yarn surface and protrudes as described above, and the end does not appear on the yarn surface. It refers to the sum of the number of fluffs (like fluff B) forming a loop shape and the number including all of the fluff. More specifically, the total number of fluff is based on HAIRNESS C manufactured by Toray Engineering.
It can be obtained by measuring at 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 pieces / m and the number of fluffs having a length of 1.5 to 5 mm is less than 30 pieces / m, a feeling like a spun yarn cannot be obtained. Further, when the number of fluffs is more than 400 pieces / m, it causes pilling when used for a woven or knitted fabric, and causes problems such as poor needle passage when used as a sewing thread. I will be.

The textured filament yarn Y _K having fluff like this spun yarn, as described in the manufacturing method of the fluff will be described later, high yarn strength since it granted under twisting step multifilament yarn 3. The cutting strength is 4.
7 to 6 g / d. Because of such high thread strength, high-speed sewability and automatic sewing property can be extremely improved especially when used for sewing threads.

In general, a high-strength filament yarn (lower warp or upper warp) that has not been subjected to fluffing has a cutting strength of 6 to 7 g / d, especially when used for a sewing thread. The sewability and the automatic sewability become extremely poor. The reason for this is that since there is 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 referred to in the present invention is a value measured according to JIS L-1073.

A plurality of multifilament yarns constituting a filament-processed yarn having fluff such as the spun yarn of the present invention have a single fiber fineness different from the case where each of the multifilament yarns is formed of the same filament group having a single fiber fineness. In some cases, at least two types of filament groups are combined. In the case of the multifilament yarn,
In the case of the latter multifilament yarn, the filament group having a small single fiber fineness is selectively shortened and the filament having a large single fiber fineness is obtained, whereas the filament group is uniformly shortened by the fluff processing. The group is characterized in that it is hardly shortened. Therefore, in the case of the latter multifilament yarn, the filament group having a small single fiber fineness is mainly shortened and the filament group having a large single fiber fineness acts strongly on the number of fluffs, and the number of fluffs is large and high. Can be strong.

As an example of the case where the multifilament yarn is composed of two kinds of filament groups having different single fiber deniers, a filament group having a small single fiber denier has a single fiber denier of 0.1 to 1.5 denier and a single fiber density of 0.1 to 1.5 denier. It is preferable to combine single filaments of a filament group having a large fineness in a range of 3.5 to 10 denier, and it is preferable that the difference in denier between them is 2 denier or more.

The number of filaments constituting the multifilament yarn is preferably 30 per filament from the viewpoint of obtaining a soft and moist texture or knit by giving 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 neps and the disorder of the yarn surface on the yarn surface.

The material of the filament yarn constituting the filamentized 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 material such as polyester or nylon. It is preferable to use a synthetic fiber filament yarn having a low elongation and a high tenacity type. 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 yarn is 100 to 300 denier and the number of filaments is 50 to 250.

The cross section of a single filament is generally circular, but when used for clothing, it is triangular, Y
It may have an irregular cross section such as a shape, a pentagon, a hollow, and a flat shape. Special varieties such as high gloss and low gloss can also be used. When the multifilament yarn is composed of at least two types of filaments having different single fiber deniers, the difference in yarn strength between those that are made shorter and those that are not made shorter as described above. The fibers may be obtained by providing a difference in fineness, but may be obtained by providing a difference in strength or elongation depending on the material of the single filament, the processing method, or the like, while the single fiber fineness is the same.

The filament group having a different single fiber fineness is preferably two or three, but may be four or more. From the viewpoint of productivity, the two or more filament groups having different single fiber deniers are preferably melt-spun from the same polymer with the same die in the spinning step.
A filament group having a small single fiber fineness and a filament group having a large single fiber fineness may be separately spun and then combined.

Next, a method for producing a filament-processed yarn having fluff such as spun yarn of the present invention will be described.
A plurality of the multi-filament yarns subjected to the lower twist are reciprocally wound around the alignment guide, the yarns on the outward path toward the guide and the yarns on the return path are interlaced with each other and subjected to fluff processing. The filament yarn is to be twisted. In particular, it is important to apply strong torsion and ironing at the same time in a state where a plurality of the yarns subjected to the lower twisting are provided to perform the fluffing.

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 Italian twister, a down twister, a double twister or the like can be used. When fluffing is performed using these twisting machines, a plurality of yarns that have been released by lowering or wefting out the lower twisted yarn are drawn out, and the yarns are being aligned or before being wound. Is to be implemented in the part where the vehicle runs.

FIG. 3 shows an example of a process in which the yarn twisted downward by the up twister is pulled and aligned in three yarns to continuously perform fluffing. In FIG. 3, 1a, 1b, 1c are bobbins, 2a, 2b, 2c are spindles, 3 is a belt, 4a, 4b, 4c are feed rollers, 5 is a guide roller, 6 is a feed roller, and 7 is a feed roller. Denotes a cheese, 8 denotes a take-up roller, 9 denotes a guide roller, 10 denotes a pin, 11 denotes a guide roller, and Ya, Yb, and Yc denote multifilament yarns with 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 driven to rotate by the belt 3. I have. While rotating the spindle, multifilament yarns Ya, Y
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 are drawn.
, A multi-filament yarn Y having three multi-filaments into which a lower twist is inserted between the feed rollers 4a, 4b, and 4c in the S direction or the Z direction, and then the lower twist is inserted.
a, Yb, and Yc are tensioned between the upper feed roller 6 and the guide roller 5 and the pin 1 while being aligned.
The yarn is subjected to fluffing by a yarn-yarn self-rubbing device composed of zero.

FIG. 4 shows a yarn used in the method for producing a filament-processed yarn having fluff such as spun yarn of the present invention.
It is an outline view showing an example of a thread self-rubbing device. Y _O indicates a yarn on the outward path, Y _O ′ indicates a yarn on the return path, and P indicates a crossing point of the yarn. In this fuzzing, as shown in FIG. 4, when the multifilament yarns Ya, Yb, Yc are reciprocally wound around the guide roller 5, the yarn Y _O on the forward path toward the guide roller 5 and the yarn Y on the return path returning. Pin 10 with Y _O '
At the intersection P, the two yarns Y _O , Y _O '
When a strong torsion and ironing are applied, a part of the single filament group constituting the multifilament yarns Ya, Yb, and Yc is shortened to generate fluff.

The multifilament yarns Ya, Yb, and Yc that have fluffed in this manner are wound from the feed roller 6 to the cheese 7 via the take-up roller 8 (see FIG. 3). This cheese 7 is then hung on a top-bending machine to apply top-bending. The fluff processing is as shown in FIG.
The yarn itself is scraped by itself. In the example shown in FIG. 4, the yarn Y _O of forward path is given torsional approximately 90 ° by crossing as yarn Y _O 'and 4 of the return path, also yarn Y _O of return path 'Is twisted by about 90 ° by interlacing with the yarn Y _O on the outward path side. Therefore,
When the multifilament yarn passes back and forth at the intersection point P, a total of about 180 ° of twist is given.

In this fluffing, to stabilize the twisting and ironing action at the intersection P, it is preferable to arrange a pin 10 or a roller as shown in FIG. . More preferably, a guiding roller 9 or a pin as shown in FIG. 4 is arranged on the supply side of the intersection P, and a guiding roller 11 or a pin is arranged on the exit side. If the exit roller 11 or the pin is moved in the direction of the arrow so as to traverse the yarn path and the entrance / exit angle θ between the entrance side and the exit side of the yarn is adjusted, the degree of twisting and ironing can be changed. And thereby the number of fluff can be adjusted.

The tension at the time of the rubbing treatment by the crossing is preferably 0.3 g / d or more on both the backward path and the forward path. Also, the twist given by the crossing is
θ is 180 ° or more, preferably 360 ° or more. By giving a twist of θ of 180 ° or more, a half or more of the outer circumference of the yarn can be brought into contact with the yarn of the mating side to perform the rubbing treatment.

The twisting direction of the interlacing may be either the S or Z direction, but from the viewpoint of increasing the number of fluffs, it is preferable to intersect while twisting in the same direction as the lower twisting direction. The fluff length can be shortened by inserting a large number of lower twists, and can be lengthened by inserting a small number. By such an adjustment, the fluff length is set in the range of 1 to 5 mm. In performing such a rubbing treatment, the productivity is improved while preventing the filament from becoming brittle due to the generation of a large amount of frictional heat due to the rubbing, reducing the yarn strength due to scraping, lightening the rubbed portion, or preventing the generation of white powder. From the viewpoint, the yarn traveling speed is set to 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. 5, reference numeral 12 denotes a feed roller, 13 denotes a fluff processing apparatus, 14 denotes a feed roller, 15 denotes a bobbin, and 1 denotes a bobbin.
Reference numeral 6 denotes a spindle. In FIG. 5, the multifilament yarns Ya, Yb, and Yc once wound on the winding bobbin on which the lower twisting has been performed are released by the wefting method and taken up by the feed roller 12 while being aligned.
Next, the fluffing is performed by the thread-thread self-rubbing device 13 between the continuous feed rollers 12 and 14 under tension. Next, the fluffed multifilament yarns Ya, Yb, and Yc are wound from the feed roller 14 onto the bobbin 15 while rotating the spindle 16, thereby forming a filament having a fluff like a spun yarn according to the present invention. Yarn is obtained.

FIG. 6 is a process chart showing an example of the production method according to the present invention in the case where lower and upper twists are continuously performed 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 yarn-yarn self-rubbing device, 23 is a feed roller, and 24 is a feed roller.
Indicates a bobbin, 25 indicates a belt, and 26 indicates a spindle.

In FIG. 6, the multifilament yarns Ya, Yb, Yc wound on the bobbin are twisted downward by spindles 17a, 17b, 17c driven by the belt 10, and the yarns Ya, Yb, Yc are formed. While being aligned, it is taken up by the feed roller 21 via the guides 19 and 20. The fluff processing 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 to the bobbin 24 while rotating the spindle 26 by the drive of the belt 25, whereby the fluff such as the spun yarn according to the present invention is obtained. The obtained filament processed yarn can be obtained.

In the manufacturing method of the present invention, the number of pieces to be aligned in the lower twisting step before giving the upper twist may be two or more, but preferably two to seven, and from the viewpoint of improving the balance. More preferably, the number is two for clothing and three or seven for sewing thread. Also,
The number of lower twists of the multifilament yarns to be aligned may be different from each other, and the lower twist directions may be different from each other.

The relation between the number of upper twists and the number of lower twists is determined by setting the twist direction and the number of twists so as to maintain the balance of the twist torque when the filament yarn having fluff such as 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, if the lower twist number is expressed as a twist coefficient from the viewpoint of improving the convergence as a sewing thread or a sewing thread and obtaining sufficient sewability, the twist is considered. Preferably, the coefficient k is 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,
It is preferable to apply the lower twist so that the twist coefficient k is 12000 or less. Here, the twist coefficient k is T · D
^1/2 (T: more than one meter, D: fineness). It is more preferable that the twist coefficient k of the lower twist is in the range of 7000 to 11000. It is preferable that the upper twist is 60 to 90% of the number of lower twists in the Z direction. Usually, a sewing thread or a sewing thread is twisted and set as necessary after twisting an original thread, and then dyed and finished. Dyeing is generally performed in skein or cheese form.

The sewing thread or sewing thread using the filament-processed thread of the present invention is not limited in count, that is, the thickness of the sewing thread.
Denier Miko Yori), # 60 (50 denier Miko Yori), # 50 (70 denier Miko Yori), etc. can be used as general-purpose sewing or sewing threads. Thicker ones can be used for industrial materials. . The number of filaments of the original thread constituting 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 measurement of the fiber length and the number of filament processed yarns (FIGS. 7 and 8) were obtained as follows. That is, one point at the center of a 300 mm long sewing thread is gripped, and the twist of the sewing thread is untwisted and disassembled. Subsequently, the single fibers that were not gripped were pulled out and removed. The single fibers remaining after grasping one point were arranged one by one according to the thickness of the fiber, and the length was measured, and a histogram of the length and the number of single fibers was prepared every 25 mm.

The evaluation of the sewability of the sewing thread in the examples (Table 1) shows the following evaluation results. In Table 1, Comparative Example 3 is a spun thread (a sewing thread C100 # 60 manufactured by Toyobo Co., Ltd.), and Comparative Example 4 is a non-fluffed filament thread (a sewing thread PET70D / Toray Co., Ltd.)
3-48f) was evaluated. (A) Back sewability (%) vs. spun thread Four layers of cotton broad were stacked by 400 using a lockstitch sewing machine.
Back sewing at 0 spm, length until the thread breaks (m)
Was expressed as a ratio (%) with respect to 100 as the spun yarn. The sewing machine used here is JUKI DLU-491-5
The sewing needle is Organ DB-1 # 11. (B) High-speed sewability (%) vs. spun thread Using a lockstitch sewing machine, eight layers of cotton broad are stacked 400 times.
Sewing was performed at 0 spm, and the length (m) until the thread was cut was expressed as a ratio (%) when the spun thread was set to 100. The sewing machine used here is JUKI DLU-491-5
The sewing needle is Organ DB-1 # 11. (C) Thread strength retention rate after sewing (%) The sewing thread after sewing was released and the strength retention rate with respect to the original thread was expressed. Example 1 A high-strength polyester multifilament yarn having a weight of 7.5 g / d (70 denier-48 filaments, single fiber fineness 1.46 denier) was obtained according to a lower twisting process using an up twister as shown in FIG. , S direction 9
The lower thread is twisted at 66 T / m, and the yarns are aligned in three yarns (210 denier-144 filament), the yarn traveling speed is 10 m / min, the forward side 160 to 175 g, and the backward side 400 to
It is wound around the guide roller 5 under a tension of 425 g, and the yarn on the forward path and the yarn on the return path are crossed in the S direction in the same direction as the lower twist to give a twist of about 360 ° and ironing. Fluffy.

Next, the obtained three-lined fluff yarn in the aligned state is 709 T / m in the Z direction by a down twister.
To give a filament-processed yarn. The characteristics of the filament processed yarn were as follows. The number of fluffs having a fluff length of 1 to 5 mm 185 pieces / m The number of fluffs having a fluff length of 1.5 to 5 mm 60 pieces / m Strength 1120 g (strength 4.9 g / d) In the above-mentioned fluff processing, the filament is shown in FIG. As in the case of the fiber length and the number of fibers, all of the 48 fibers were shortened, but the number of filaments of each short fiber was relatively uniform.

When a plain woven fabric was formed using the obtained filament-processed yarn having a fluff like a spun yarn, a woven fabric having a soft, moist, high-grade texture was obtained. On the other hand, in order to process the filament-processed yarn having fluff such as this spun yarn into a sewing thread, after performing a dry heat treatment at 180 ° C, the soft-wound cheese is dyed with a high-pressure cheese and wrapped around a bobbin for the sewing thread. Was.
As a result, the difference in dyeing in the bobbin for the sewing thread was not visually observed, and the sewing performance by the high-speed automatic sewing machine was further evaluated. The appearance was good. Table 1 shows the evaluation results of the sewability.

[0050]

[Table 1] Example 2 Regarding the relationship between the number of fluffs and the strength, using the same filament yarn as in Example 1, the number of lower twists, the number of upper twists, and the yarn traveling speed were the same, and only the degree of tension of the feed roller was changed to change the forward side. Tension 210-238g, 134-141g
And a fluff processing was performed to prepare a filament processed yarn having a fluff such as a spun yarn. The characteristics of the filament processed yarn were as follows.

A spun-like fluff having a forward tension of 210 to 238 g 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 / m Strength 990 g (Strength 4.7 g) / D) Spun-like fluff with a tension of 134 to 141 g on the outward path side Number of fluffs with a fluff length of 1 to 5 mm 105 / m Number of fluffs with a fluff length of 1.5 to 5 mm 31 / m Strength 1269 g (strength 5.4 g) / D) When the filament-processed yarn having fluff such as the spun yarn was evaluated as a sewing thread in the same manner as in Example 1, the high-speed sewability and the automatic sewability were all good, and the appearance of the sewn seam was good. Was good. Example 3 In the same manner 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 filament (single fiber fineness 6 denier) composed of a filament group having a different single fiber fineness is used. (6 filaments and 36 filaments with a single fiber fineness of 1 denier) are twisted downward at 966 T / m in the S direction, and the yarn traveling speed is 10 m while the three yarns are aligned.
/ Min, 163 to 172 g on the outward route, 410 to 436 on the return route
The yarn was wound around a guide roller under a tension of g, and the yarn on the forward path and the yarn on the return path were crossed in the S direction to give a twist of about 360 degrees and ironing to give a fluff.

Next, the obtained fluff yarn was twisted upward at 709 T / m in the Z direction by an up twister to produce a filament-processed yarn having fluff such as spun yarn. The characteristics of the filament processed yarn were as follows. The number of fluffs with a fluff length of 1 to 5 mm 212 / m The number of fluffs with a fluff length of 1.5 to 5 mm 48 pieces / m Strength 1240 g (strength 5.5 g / d) In the above-mentioned fluff processing, the filament is as shown in FIG. In each of the decomposed yarns, none of the six filaments having a single fiber fineness of 6 denier were not shortened, but all 36 filaments having a short fiber fineness of 1 denier were shortened.

When a flat fabric was formed using the obtained filament-processed yarn having fluff such as spun yarn, a woven fabric having a soft and moist texture and a firm and stiff texture was obtained. Further, when the filament-processed yarn having fluff such as the spun yarn was evaluated as a sewing thread, the high-speed sewability and the automatic sewing property were good, and the appearance of the finished seam was good. It should be noted that Example 2 had a greater number of fluffs and higher strength under the same fluff processing conditions than Example 1. Comparative Example 1 A 70-denier-48 filament polyester multifilament yarn was subjected to downward twisting in the S direction of 966 T / m in accordance with a downward twisting process using an up twister as shown in FIG. 709T in Z direction
/ M, and the yarn traveling speed is 10 m / min.
It is wound around a guide roller under a tension of 12 to 124 g and a backward side of 290 to 320 g, and the forward side yarn and the backward side yarn are intersected in the S direction, thereby twisting about 360 degrees and ironing. The fur was processed to give a filament-processed yarn. The characteristics of the filament-processed yarn had the fuzz distribution shown in Comparative Example 1 in FIG. 2 and were as follows.

The number of fluffs having a fluff length of 1 to 5 mm 5 pieces / m The number of fluffs having a fluff length of 1.5 to 5 mm 0 pieces / m Strength 1000 g (strength 4.5 g / d) Although the fibers were shortened, the number of filament yarns of each fiber length was not uniform, and there were many filament yarns of long fiber length.

When a plain woven fabric was formed using the obtained fluff yarn, the hand had a strong slimy texture like a raw filament yarn. In addition, when this filament processed yarn was evaluated as a sewing thread, the sewability was lower than in Examples 1 to 3. Table 1 shows the evaluation results of the sewability. Comparative Example 2 According to a lower twisting process using an up twister as shown in FIG. 3, one polyester multifilament yarn of 70 denier-48 filaments was 966 T / S direction.
m, and the yarn traveling speed is 10 m / min.
By winding around the guide roller under a high tension of up to 38 g and a backward path of 120 to 143 g, the forward yarn and the backward yarn are intersected in the S direction, thereby twisting about 360 degrees and ironing. It was given fluff.

Next, the obtained filament processed yarn was
The main thread was aligned and the upper side of 709 T / m was twisted in the Z direction to produce a filament-processed yarn. The characteristics of this filament processed yarn have a fluff presence distribution shown in Comparative Example 2 in FIG.
It was as follows. The number of fluffs having a fluff length of 1 to 5 mm 45 / m The number of fluffs having a fluff length of 1.5 to 5 mm 4 pieces / m Strength 1015 g (strength 4.6 g / d) In the above-mentioned fluff processing, all of the 48 filaments are shortened. However, the number of filament yarns of each fiber length was irregular, and there were many filament yarns of long fiber length.

When a plain woven fabric was formed using the obtained filament-processed yarn, the hand had a slimy texture like a raw filament yarn. In addition, when this filament processed yarn was evaluated as a sewing thread, the sewability was lower than in Examples 1 to 3. Table 1 shows the evaluation results of the sewability.

[0058]

The filament-processed yarn having fluff such as spun yarn of the present invention has fluff and bulkiness as spun yarn has, and is soft and moist when woven or knitted, and has a high quality touch. Can be given. Also, since it has a higher thread strength and a texture like a spun thread than a conventional spun thread or a fluffed filament-processed thread, it can be used as a sewing thread excellent in high-speed sewability.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a filament-processed yarn having a fluff such as 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 a comparative example.

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

FIG. 4 is a process diagram showing an example using a yarn-yarn self-rubbing device in the production method according to the present invention.

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

FIG. 6 is a process diagram showing an example of a case where lower and upper twists are continuously performed on the same twisting machine in the production 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 a fluff such as 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 a 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: Self-rubbing of yarn-yarn Apparatus 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

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI D02J 1/16 D02J 1/16 3/02 3/02 Z (72) Inventor Masatoshi Kojima 1-1-1, Oe, Otsu City, Shiga Prefecture No. 1 Toray Corporation Seta Plant (72) Inventor Yoshikazu Tsuji 1-1-1, Oe, Otsu City, Shiga Prefecture Toray Corporation Seta Plant (56) References JP-A-3-64546 (JP, A) JP-A-4-91245 (JP, A) JP-A-3-27144 (JP, A) JP-A-6-306720 (JP, A) JP-A-4-1855731 (JP, A) JP-A-48-44547 ( JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) D02G 1/00-3/48 D02J 1/00-13/00

Claims (4)

(57) [Claims] 1. A plurality of multifilament yarns having a lower twist are aligned and subjected to an upper twist, a part of a single filament constituting the multifilament yarn is shortened, and the short fiber At least one end is a fuzz yarn restrained by a lower twist or an upper twist and protrudes as fluff on the yarn surface, wherein the fluff has a length of 1 to 5 mm.
0 to 400 pieces / m, of which the length is 1.5 to
Filament-processed yarn having a fluff such as a spun yarn having 30 mm / m or more of 5 mm fluff and having a yarn strength of 4.7 to 6 g / d. 2. The method according to claim 1, wherein the multifilament yarn is 30 to 3
00 present together constituted a single filament consists at least two different kinds of single-filament group of single fiber fineness of which claim 1 single filament group towards the single fiber fineness is small are mainly fiber shortening Filament processed yarn having fluff such as spun yarn. 3. A multifilament yarn provided with a lower twist in a lower twisting step is aligned and then reciprocally wound around a guide, and a forward yarn and a return yarn are processed at a processing speed of 3 to 3.
The fibers are twisted and ironed by interlacing at 100 m / min to give a fluff, and then the fluffed multifilament yarn is formed into a filament-processed yarn having a fluff such as a spun yarn on which the upper twist is applied in the upper twisting step. Production method. 4. The method according to claim 1, wherein the twist direction of the crossing is multifilament.
The method for producing a filament-processed yarn having a fluff, such as a spun yarn , according to claim 3 , wherein the yarn is set in the same direction as the lower twisting direction .