JPS58156045A - Hard twisted yarn-like special processed yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

The present invention aims to improve the strength of the finely twisted yarn, such as its sharpness, drapability, weight, and stiff texture, as well as the unevenness of the spun yarn stock on the fabric surface. This relates to processed yarn. According to history, in 7Y-Sakae, the untwisted part and the untwisted part, which were aligned in the longitudinal direction of the yarn, were formed in the evening and the next day. Twisting direction conversion between =
Itogobanbun (11 and
There is an untwisted or existing yarn φ part (2) in the direction change part between the untwisted part and the solution 1 part of the untwisted part and the untwisted part (2), and the irregular spacing and irregular stitch 1). It existed in the Guangsong Dynasty (
The unresolved length, part, and pot-resolved part of 1) are all made of 1) KPA yarn, which has an elastic modulus of 1). Conventionally, unsolved unsolved problems have arisen by applying a frugal unsteady false twisting operation to i6 in the false twisting process. A technique for forming portions and :i#I'Mν・parts alternately is disclosed in Tokoan No. 49-8414. Special Publication No. 49-108353, Special Publication No. 51-4
No. 9949 and Japanese Patent Application Laid-open No. 53-61745. These f-thread processing mosquitoes f + I are those using the shadow Buddha's me 1 wand #Lw +1'', and the yarn speed and temporary k? Is it possible to form an alternately twisted yarn with an unraveled needle part and a height of 1 to 2 m or more depending on the intermittent ruj of A, but according to these prior art methods? Both of them have a considerable length of untwisted part, and the twist density of the untwisted part and the separately untwisted part is low, so that a high degree of bow φ induction effect can be obtained. It was also lacking in craftsmanship and craftsmanship. In order to eliminate the drawbacks of the conventional alternately twisted yarn, the present inventors have developed a f-tight non-fixed temporary trunk, and the shape of the alternately twisted yarn +1 in operation.
1247) By grasping the fn image and clarifying the original shape, and as a result, applying a special force to the right-handed twist forming means of the cf flavor, the twisting effect is synergistically achieved. Takanu,
4) K Shari RG that has never been obtained before
, Dragenity, 1′! By imparting texture and elastic texture to the fabric surface m1, Yasai Yoto succeeded in twisting the alternately twisted yarn of λ, and inventively embroidered it. The two objectives of the present invention are to achieve a high twist effect and a spinning yarn (dj that can impart an ax twist effect to the surface of the fabric).
・Low yarn +i 1g = Specially processed yarn is offered. The present invention is based on a heat-oJ plastic synthetic fiber, which is applied to a light strip with a non-constant thickness of fibers by false-twisting to create a structure in the direction of false-twisting and moxibustion. A thread that alternately forms a loose capital and a voice disassembled capital that does not twist in the temporary pressing and untwisting direction,
The part where the twisting direction changes from the untwisted part to the untwisted part is the part where the twisting direction changes from the untwisted part to the untwisted part. )and. From the unresolved trunk to the 7ffi Akira part σ) The twisting direction rewriting part and the unresolved twisting part force to the unresolved twisting part have it untwisted analysis, respectively. 1 exists at irregular intervals and of irregular length, and 6+I ii
l' Thread part (1: The untwisted shavings are passed through the untwisted part is 40 #
The initial bullet rate is less than /d, and the aim is to use the medium-twisted yarn for the first time. Below, I will give a detailed explanation of the first issue. First of all, the present invention n11 I yarn can be manufactured by paying in the manner described in Q, and then in the direction of M ＼ θ, -, due to bad circumstances, the court clerk of the Song Dynasty was unpaid h or herring, and the light stripes were made. Over-twisting is formed due to the twisting condition. The processed yarn of the present invention has a twisting direction changing part that is formed during the change from the light of the light to the twisting part, that is, from the twisting part to the untwisting part. The direction changing part, and the twisting direction changing part formed when the yarn changes from the twisting state p6 to the untwisting state of the yarn, that is, the twisting direction changing part from the twisted part to the unraveled part, has a cape twist. The thread part (1) where there is virtually no fiber and the direction change from the untwisted part to the untwisted part 1'17if! +li and the twist direction changing part from the over-twisted part to the untwisted part each have a thread ax part (2) where the untwisted part exists. In addition, the yarn portion (11 and the yarn sum 1 minute (2) are present at irregular intervals in the longitudinal direction of the yarn, and at irregular lengths. Here, the non-twisted portion is substantially The term "not present" means that there is no twisting state or a low twisting state at the part where the twisting direction f is changed.9
It has been found that the fibers are made in an inconspicuous manner so that the spun yarn-like uneven effect of other cape twists can be brought out suddenly without diminishing the high degree of strong twist effect which is the object of the present invention. In terms of monthly salary, it refers to the part with the number of twists of 100T/M or more or 1cm twist. In order to express the high degree of twisting effect and the natural mottling of the spun yarn on the fabric surface, the most important thing is to cure the JJ-10 density and to create the natural mottling. 5- Even though the existence of the twisted part is random IIJj IN ,
It exists in random lengths, and if it is too long, the high degree of strong twist effect will not be developed and the fabric will not have a crisp feel. On the other hand, if there is a non-twisted part in all the twist direction changing parts, it is not possible to expose the natural irregularities of the young yarn. The material direction changes from the untwisted part to the untwisted part and the rubbing direction from the untwisted part to the untwisted part) Ac
There is a thread part (1) in which there is virtually no untwisted part in Yato, and a thread part (1) in which there is no twisted part, and a thread part (2:1 or father) in which both are present. They are mutually or consecutively.The non-invention processed yarn has a high twist density in both the untwisted part and the 3-way untwisted part, so the untwisted yarn and the untwisted @X The border between the over-twisted capital, that is, the decorative twisted yarn part, is clear, and the natural irregularities of the highly twisted young fruit and the spinning yarn are ridged and the fabric #AAl
1. I can be myself. Also. In order to achieve the birth of young rice as a starting point, it is an honor h1□・minute (1
) occupies the majority of the play, or if you want to display more of the Table 6 - surface effect, use the Toukan Itojo (2)
It is possible to increase the However, in order to make the strong twisting effect, which is the purpose of the present invention, develop in a more young fruit, it is necessary to
',,: Yarn Seibun (+1 exists in 50% or more of the yarn 1-
That's preferable. FIG. 1 is a schematic view of the processed yarn of the present invention, with an untwisted part (AI) having twist in the false twist heating direction and a 314 untwisted part that cures the twist in the direction of false twisting and untwisting. (C1), and between the unresolved area (AI) and the densely twisted area (CI), the intertwined area (B]), the dissection (CI), and the thin (unresolved area (CI)).
(1) where the untwisted part (Dl) is substantially absent between A2) and the untwisted part with twist in the false twist heating direction)
(A2) and J〆1) Untwisted trunk (
C2), and the bulky part (B2) of the unraveled part (A2) and the densely twisted part (C2) and the unraveled part (
C2) and ToJ? <The untwisted portion (AI) fi (the bulky untwisted portion (1,') 2 of l) and the existing yarn portion (2) exist alternately with random lengths. The brush 1 diagram shows the yarn part (1) and the yarn part (2+), or the yarn part (1) and Yoei & F part (
2) It can be expressed alternately or continuously. When the thread part (1) is twisted, Th = <The unmelted furnace tube is (A
t), and if the thread B1 minute (21 continues i! Yarn part (1)
Is it unsolved whether it is Mukanrei or Glory (2)? Willow (A1) and Zuta (A2). Next, the initial elastic modulus of both the unraveled part (A1) and the force L'/released part (C1) of the thread oil molecule li in urr=i-processed yarn is 4017 dJv or less. The drapability of the fabric weight is related to the initial elastic modulus of the yarn used, and in order to improve the drapability between the fabrics, it is necessary to
It is necessary that the yarn has an elastic modulus, and drapability can be imparted to the fabric when the initial elastic modulus of the yarn is about 40 #/d or less. Has there been any conventional double-swept thread that aims to improve the drapability of the fabric by reducing the initial 114I perforation?1
The bow of the processed yarn of the present invention has a twisting capital (A1) and a twisting capital (Ct) of the payment period elasticity of 4011/d or less. This initial case rate is 50% of the supplied raw yarn.
% or less 9 For example, in the case of polyester filament yarn 3
0#/d or less, 20 for nylon filament yarn
It is possible to make it less than #/d. Thus, according to the processed yarn of the present invention, in which 50% or more of the fibers are present in the yarn, superior drape properties can be imparted to the 9-knit woven fabric. Figure 2 shows the untwisted part (A1) and overcrowded twisted part (C1) of the invention force 1/1 yarn and the initial stage of the supplied raw yarn ↓

[, (This is a graph showing the relationship between force and elongation.
．． l! % rate is as high as 95 #/d, whereas that of the untwisted portion of yarn portion (1) of the processed yarn of the present invention is 25 #/d.
/d, and that of the overcrowded twisted part ti of the thread part (1) is 20
It can be seen that it is low along with 11/d. Next, the fabrication method and original method of the processed yarn of the present invention will be explained. First, regarding the formation of the non-twisted part of the conventional alternately twisted yarn, we will clarify the case of temporary filling processing by intermittent twisting of fluid.
The yarn is passed through a temporary twisting process using a compressed fluid twisting nozzle (hereinafter referred to as the nozzle), and the fluid is intermittently applied to the nozzle.
By repeating the turning and stopping of the thread by doing 8-9-
i' 311t + 1yi when processed using &
When the body is stopped, an unmelted furnace tube' is formed, and when the eel is supplied, an unmelted twisted capital is formed. There is also a #twisted part between the unraveled part and the loosely twisted part and the unraveled part and the subsequent untwisted part Σ. be done. The formation of a decorative layer between the front untwisted part and the following over-twisted part is caused by the untwisted part of the yarn falling into the untwisting zone when fluid is supplied to the nozzle or the nozzle is opened. 'N1 bij begins, the unraveled part is Saneteto Tsukai (11
This is because the untwisting action is sufficient to untwist the untwisted part, and only the untwisted part is untwisted, resulting in a forestless part. On the other hand, when the supply of the door body to the nozzle is stopped, the nozzle's recent V a ru push' is centered around the exchange part, and the formation of a sleeping twist between the unraveled part and the untwisted part that continues. Yarns in the untwisting zone are sparrow, 4 negative λ section. The yarn in the heating zone becomes an untwisted part or becomes a VC#il persimmon because the torque of these twisted parts in mutual directions cancels out the twist. The can body formed in this way was intoxicated and stunned by the way the threads were twisted.
− and untwisted portions, and when these yarns are used for knitted fabric, the frequency of untwisted portions is high. This is because the yarn has only a slight focusing effect that cannot be called a so-called convergence effect, and is not suitable for use as a clothing fabric, and this is also the reason why conventional alternately twisted yarns do not elongate. In order to achieve a strong twist effect and 1F) J-axis-like natural irregularities in the alternately twisted yarn, a strong twist effect and the formation of cape twist portions that exhibit unnecessary pattern patterns can be prevented, and the spun yarn There is a need for a technique that goes beyond the conventional common sense of alternate yarn feeding, in which only the non-twisted portion necessary to express the regret spots is present within the range that does not eliminate the strong twist effect. It was something. The inventor of the present invention has carefully observed the phenomenon of excessive redness caused by false twisting during the pre-arranged false twisting process, and conducted 9 different experiments. It is possible to obtain the flaw-specially processed yarn of the present invention in which the yarn portion (2) in which the formation of ``++'' and non-twisted portions are prevented from forming (a yarn portion (2) in which uneven portions are present as a twisted material) is mixed. That is, the formation of the yarn portion (li) of the processed yarn of the present invention is carried out by, for example, in a false twisting machine using a nozzle, the supply roller acts as a feed roller to supply and stop the yarn to the nozzle. Use a roller with a) ability to change the speed of 5J. First, thread the yarn at a predetermined high overfeed rate. If you increase the speed of the variable speed roller at the same time as fluid is supplied to the nozzle, The untwisting zone runs at an overfeed rate and therefore twists with ballooning in the untwisting zone.In this case, the ballooning in the untwisting zone causes the nozzle and delivery roller to vibrate as a node of string vibration*1. The untwisted part in the untwisting zone is not unraveled from the vicinity of the nozzle to a part of the 11th order delivery roller by the propagation of the koshirae, but is unraveled from the untwisted part near the delivery roller by the 9th string vibration. Since the yarn is easily untwisted and untwisted, it reaches the twisting of the yarn or the delivery roller at once, and the untwisted part in the untwisting zone can be made into an overcrowded lead part, so that the untwisted part and the following This prevents the formation of a cape-twisted part between the e-twisting door and the untwisting door.In this case, unlike a mechanical false-twisting spindle, a nozzle that sprays high-pressure fluid is used as the inviting device. Stable false twisting is possible even when the speed of the variable speed roller is increased, and since the amount of twisting of the yarn increases as the overfeed rate increases, the twist in 1rnW during fluid supply is 2. It becomes a false twist or a semi-two-way twist, and can be twisted at a high density, and a high number of twists can remain in the yarn.The twist state during this twisting is a two-way twist or a semi-two-way twist. Since the length of the yarn after unwinding is significantly longer than that of normal false twisting, it also has the disadvantage of increasing the ballooning of the yarn during twisting. Since the processed yarn obtained in this way has a high number of twists, the elongation stress component changes to shear slip stress during elongation, and exhibits high elongation strain with respect to low initial stress. The initial elastic modulus is 111, which is less than 50% of that of the supplied milled yarn.
fii K can be reduced. In this way, a high density of twists is left in the yarn [from the untwisted part (A1) to the densely twisted part (CI) -13 = the fruit of the non-twisted part (B1) at the twist direction conversion part. In addition to eliminating spontaneous formation, the initial elastic modulus of both strands was reduced to 40 #/d.
However, you can do the following. After the S body has been supplied to the nozzle as described above, the supply of the heel body is then stopped, or the speed of the variable speed roller is reduced at the same time as the supply of the heel body is stopped. In this way, the yarn is twisted [! :! By stopping the thread I, the yarn running at a high overfeed rate becomes slack, and if it is prevented from being unable to run normally due to seizure on the rollers, it prevents an extreme drop in tension in the yarn running at the same time. By maintaining a predetermined tension, the twist of the four untwisted portions (in the untwisting zone) can be brought close to the untwisted trunk beyond the twist change point. Since this untwisted and constant tension is when the yarn has stopped twisting, it is necessary to make it sufficiently similar to the yarn tension during twisting. As a result, the heat receiving effect is reduced, so that a strong twisted portion that is difficult to untwist can be obtained. Also, for this reason, it is a good idea to set the temperature of the heat-setting hot water at a temperature higher than the hardness set for the dramatic false twisting process. In this way, by making the untwisted part into a strong twisted part, and by bringing the twists of the untwisted part in the untwisted zone close to the untwisted part, the untwisted part connected to the overcrowded lead part can be Formation of a non-twisted portion (Dl) between the twisted portion and the twisted portion can be prevented. In this way, since the untwisted part does not exist physically and has the twist of the sieve density, the initial elastic modulus of the untwisted part (A1) and the twisted part (C1) is 4ON/d. Thread part (
1) is obtained. Next, the formation of the yarn portion (2) will be described. If the speed of the variable speed roller is reduced at the same time as the supply of fluid to the nozzle while the yarn is running at a high overfeed rate in the yarn, the yarn will run at a lower overfeed rate and therefore in the untwisting zone. The yarn becomes untensioned without ballooning, and the untwisted portion in the untwisting zone is untwisted sequentially from the vicinity of the nozzle to a part of the telly roller due to the propagation of twist, so that the untwisted portion in the untwisting sea/ cannot be over-twisted all at once, and for this reason, the untwisted portion is merely offset by the over-twisting torque, and a non-twisted portion (B2) is formed between the ununtwisted portion and the subsequent fully twisted portion. . Similarly, the degree to which the speed of the variable speed roller is decreased is limited to such a degree that the effect of the formed loose twist H1scr>high twist effect is desired to be reduced too much, and the change -° is within a range of several percent. In the above case, either stop the supply of the corner body at the point where the nozzle decoration body was supplied, or increase the speed of the variable speed roller at the same time as the fluid supply stops to return to the original predetermined overfeed rate. Let's go home for the first time. At this time, since the yarn is at a standstill, the tension decreases regardless of the increase in the overfeed rate, or by further decreasing the yarn tension, the twisting or twisting of the untwisted part in the loosening zone is changed. Make the point extremely large and reach the edge of the untwisted part so that the untwisted part does not disappear. Similarly, the increase in overfeed rate is 0 compared to the overfeed rate of Kasuka! Before the change, it was only a few percent, and it does not depend on the rollers or otherwise make the yarn unable to run. The honor of being formed in this way (1)
and thread part (2) when supplying fluid to the nostle 1
1f1 (referred to as 08 hours), the length of which is determined by increasing or decreasing the variable speed roller speed in response to the time during which the supply of fluid to the nozzle is stopped (referred to as OFF time) Is the thread part (untwisted part (B2), (B
2) is the machining φ matter, that is, 08 hours, 01'i'F time, M period (phase of 08 hours and OFF time) 08 hours OFF.
It is determined by the time ratio, thread length, length of the heating zone, length of the easing zone, etc. ON time σ within the steady state range of health or the range where it does not occur) (
The smaller the ratio to I P' F time, the shorter the yarn length, or the higher the yarn speed, the more untwisted 8
(! The length of (B2), (nz) becomes longer. Non-twisted part, (B2). There are still many pickles where the relationship between the length of (B2) and the J-: F1) II condition is unclear. Or, regarding the untwisted part (B2), the untwisted part of the untwisted zone (11N) is not overly twisted in one stroke, but is untwisted according to the shadow propagation speed, so it is not optically spectrally untwisted, but only untwisted. The length of the untwisted part (B2) is related to the untwisting zone, yarn speed, and heat setting temperature.
) Regarding 2), it is a layered state during caress or 08 hours, 0)i
``F'R period, pigeon period, OIi' varies depending on the ratio of 08 hours to F time, so the magnitude of untwisting torque of untwisting and
Tightness of unleaded part I! The ease of twisting the first grade has increased. For this reason, it is thought that the distance is weakened by canceling out the unresolved number part and the unresolved number part. 10Kj a+] <Itokune I1.
The length of 21 minutes (21) and the length of the non-length part (B2) and (B2) are related to the machining conditions, so for example, using a random pulse generator of 1N, the supply and stop of one body can be controlled by a fluid supply valve. By operating the dyed part (2) and the non-twisted part, (R2) and (B2), which are both interlocking and long.
can be formed. Thus, in the untwisted part, the molecule i1 occupies most of the yarn and has the flame effect of #i point yarn 6. In one minute of the existing thread layer, it is possible to create layers of light scattered in the thread. The nozzle used to perforate the processed yarn of the present invention is one that rotates the yarn at high speed and performs four twists. -IJi!
111i positioned so as to direct the IAr flow of the fluid to d.
! ll or a combination of a large number of 114 thin bodies. Direction towards the inner circumference of the shadow thread = 18
- It may be placed in such a position that Alternatively, it is preferable that the yarn is inclined from the straight plane so as to give a cutting action to the yarn.
In Ume, a passive yarn feeding device (hereinafter referred to as a feeder) that rotates by the running tension of the yarn is used as a yarn feeding device.
The yarn portion (1) that does not substantially make the spindle part is
At the same time as supplying fluid to the nozzle, the load on the feeder is
This is done by changing the load of the feeder to a high load at the same time as the supply of the fltt body to the nozzle is stopped, and the twisted part (82). The Xu Zhu part (2) which does not have ([12)] has a high
m, and is formed by keeping the temperature low when the fluid is stopped. Unsolved issues regarding the processed yarn of the present invention?・As for the twist density of the twisted part, the average frequency of the twisting part must be 5ooo, zJ (n: yarn glue, ru) or more in order for the twisting effect to have a significant effect on the texture. The ratio of Itoeikusu part (1) to the yarn is more than 50%, depending on the length of Itoshuu part (:?1's unused part (B2). (I)2). Preferably. It is preferably between 70 and 80. In addition, the average number of twists mentioned here is the number of twists distributed in each twist section, averaged on the east side using a checker or ken@yanagi, and converted to the number of twists per 1 meter. [Addition of the present invention 1: Heat in yarn 1] Synthetic fibers obtained from polymers such as 1″ polyester and holamide, copolymers and blend polymers thereof, etc. are used as the W synthetic culm string. As mentioned above, [1] The processed yarn of the present invention is
Since the processed yarn of the present invention adopts the coffin structure as described above, it has a high tread density on the order of 9 meters. There are 21 pieces of yarn that hold the untwisted part and the untwisted part (minute (1)) and the untwisted part (21 pieces) that cure the untwisted part (minute (1)) and the untwisted part (21). Because they are present at regular intervals and irregular lengths, the uneven surface effect of the spun threads can be seen in peak knitted fabrics, which exhibits a high level of crispness and excellent mastering effect due to the single strong twist. In addition, in the yarn 81Σ portion (2) of yarn 81Σ (2), where the twist direction changes other than the #twisted part, there is no S-twisted part in reality, and the unsolved key part Rui. Because the tension is thinned by the light twist density of the untwisted part, the thickness of the fabric becomes thinner during pushing and pulling, and the oil amount can be felt. Since the initial elastic modulus of the unraveled and overcrowded parts is as low as 40 #/d or less, it is possible to add +1 to the drapability of the resulting fine-shaft single-piece fabric.In addition, this initial elasticity The low twist rate, together with the high density of the twisted portions, makes it possible to obtain fabrics with good flexibility and elasticity. The yarn is not flat,
The repair area at the intersection of yarns in rut knitting becomes smaller,
For this reason, it is easy to slip the first part at the intersection point, and there is also a % length of the fabric that can be obtained with drapability. It is possible to create #knitted fabrics that have the strong twist effect of 9-twist yarns and the mottled effect on the fabric surface of ='th hr yarns, which were not possible in the past. The present invention will be explained in detail below with reference to Examples. (Example 1) Polyester filament 150d/72f (circular cross-sectional shape, semi-dull yarn, starting point: bullet t!+ rate 96#/d) was assembled with a variable speed I' set roller, heater, nozzle, and Teribe IJ.
Supplied to the processing process performed by 0-ler 414,
Processing was carried out using the queen's Ql-processed yarn, and alternating fine threads as shown in Table 1 were obtained. Yarn part (1) Noise formation condition 22- Yarn φ part (2) Shape hv condition Yarn part (1) and yarn part (2) are micro-coated in advance so that the irregular opening 11 is frequently used for 1 hour. Program the computer to 7V-SakaeR1 minute (the ratio of 1 is 7
I set it to 5% and 4r. Pressure on the car body Pressure on the far body 5 So/C heater depth 190℃ Take-up roller penetration 78m/n Kc1 surface Average of untwisted part of yarn 1 (1) Number of twists',
1400T/311+ [i yarn portion 0) rice production/ratio: 75 section
I] No pif (average length of Bit3
63 yn:1 The untwisted part of the obtained processed yarn exists irregularly with a word size of 16 crn and a minimum length of 3 m, and has a length of 5# (Bl).
existed slowly as a transition point for the influence of power, and no humorous length was seen. This processed yarn has a Japanese yarn density of 90 threads/inches, a yarn density of 58 threads/1 to 1, and two bond cords with a thread density of 741. ＞k
And this Shuno Vc Totomi polyester alkali #? After applying lid processing (19% Mit), dyeing, and processing, it appeared that the surface of the yarn was covered with high and light fibers, and had a surface mottling pattern similar to that of camellia. The nerimono was enjoyed for its crunchy texture, drapeability, oily texture, and elastic texture. Ikishi from 41 U1? Figure 1 shows IR4, a road side view, and Figure 2 shows an example of the processed yarn of the present invention.
The figure shows the untwisted portion (AI) of the yarn portion (]1 of the processed yarn of the present invention.
. It is a graph showing the relationship between the continuous twisting part (CI) and the initial 11... force and elongation of the supplied yarn. (AI): Unresolved part (Hl) of the thread part (1): Unresolved part (Hl) of the thread part (1), where the shadow direction changes from the unresolved area to the overdense liquid part of the thread part (1). C1) : Overcrowded part (Dl) of thread part (1) : Thread part (#'! P part (A2) in Koshirae direction change from 11's tsuwari capital to unresolved twisted part (A2) : Itoei painting ( Untwisted part (82) of minute (2):
Cape twisting part (C2) from the untwisted part of the thread part (2) to the twisting direction changing part to the threading direction tm (i): The threading part (D2) of the thread part (2): the thread Part (2), where the twisting direction is changed from the twisted part to the untwisted part 1), -%rt Applicant Unitika Co., Ltd. 25- Finger 11 Sword 2 Figure 5 train ('10)

Claims (1)

[Claims] (1) Untwisted portions with heat in the false-twisting heating direction and the untwisted part in the false-twisting direction obtained by subjecting the plastic synthetic fiber yarn to an unsteady false-twisting operation, which is a process of false-twisting. A yarn φ in which untwisted parts and untwisted parts having a twist of for! The thread part (1) that actually does not exist in the w part
)and. Change in twist direction from untwisted part to AM twisting? p is also 1, and the thread part where decorative twists exist at the part where the twisting direction changes from the threaded yarn part to the untwisted part (21, etc.) are present at irregular intervals and at irregular lengths. , and the untwisted part' and the twisted part of the yarn portion (1) have an elastic modulus of 40.9/d or less.