JP4129760B2 - Composite false twisted yarn, method for producing the same, and woven / knitted fabric - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a toned composite false twisted yarn suitable for clothing and industrial material use. More specifically, the present invention relates to a composite false twisted yarn having unprecedented polychromaticity and wild flow and a method for producing the same. And a woven or knitted fabric using the composite false twisted yarn.
[0002]
[Prior art]
For false twisted yarns that have been subjected to fluid treatment by false twisting of cationic dyeable polyester yarns and cationic dye-non-dyed polyester yarns, entanglement depends on the composition ratio, number of filaments, or entanglement conditions of the false twisted yarn. The form changes and the feeling of jealousy changes accordingly. However, in this case, only dichroism can be expressed in any case, and when twisting is further performed, the wrinkle becomes almost inconspicuous and the effect of wrinkle cannot be obtained. In addition, the twisted cocoons are not only monotonous due to their structure, but also costly when considering productivity.
[0003]
Therefore, a yarn incorporating pleochroism has been proposed in, for example, Japanese Patent Application Laid-Open No. 7-324237. According to this, the multicolor effect is a yarn obtained by false twisting and entanglement processing of a mixed thick and thin yarn of a cationic dye-dyeable polyester and a non-dyeing polyester to a cationic dye, which is a disperse dye. The effect of different colors is expressed by dyeing with a cationic dye. However, with this method, even if subtle hues are included, only 3 colors can be expressed at most, and the wrinkle is a good wrinkle like top dyed wool, so the wild multicolor flow wrinkle that is the aim of the present invention Cannot be expressed.
[0004]
Further, a yarn with emphasized contrast is proposed in Japanese Patent Laid-Open No. 8-35137. According to this, the cationic dye dyeable polyester yarn and the cationic dye non-dyeable polyester yarn have thick details in the fiber axis direction, and the phases of the thick fineness portions of all the yarns are aligned. Thus, the contrast of light and shade can be enhanced. However, in this method, if the cationic dye-dyeable polyester yarn and the cationic dye-undyed polyester yarn are mixed at the time of spinning, the filaments of all the yarns are likely to be mixed. Therefore, it is impossible to express polychromaticity. In addition, the difference in fineness is large in the partial portions because the phases of the thick fineness portions are aligned, so if the false twisting process is performed, the difference in fineness becomes the tension fluctuation as it is, and the workability becomes worse and the thread breakage increases as the yarn speed increases. It is easy to occur frequently. Therefore, there exists a problem that it must process at low speed.
[0005]
[Problems to be solved by the invention]
In the present invention, all the yarns have thickness differences in the fiber axis direction, so that the difference in dyeing is different, and the use of thermoplastic synthetic fiber multifilament yarns having different dye selectivity. In addition to being able to incorporate unprecedented polychromaticity, the multi-color flow tone composite false twisted yarn that has a soft and moderate swell feeling and the production of the yarn in a series of false twist processing, costly An advantageous manufacturing method is provided.
[0006]
[Means for Solving the Problems]
The present invention aims to achieve the above object, and the composite false twisted yarn of the present invention comprises at least two or more types of thermoplastic synthetic fiber multifilament yarns having different dye selectivity, and the thermoplastic synthetic fiber. The multifilament yarns are entangled with an intertwining number of 50 to 250 / m, and all the yarns are crimped yarns having thickness spots in the fiber axis direction, and between each yarn. In the composite false twisted yarn, the phase of the thick part is shifted.
[0007]
In the composite false twisted yarn of the present invention, the thermoplastic synthetic fiber multifilament yarn has thick and thin thickness spots in the fiber axis direction, and the phase of the thick portion between the filaments of each yarn Most of them match, and the structure of the yarn has a partly reversible yarn length difference. It contains 10 to 90% by weight of the cationic dyeable yarn, and the crimp rate is 10% or more. In addition, it is preferable that a substantial yarn length difference between the yarns is 3% or less, and that the composite false twist yarn described in any of the above is subjected to twisting in the range of the following formula.
[0008]
K ≤ 22000 / D ^1/2
(Here, K represents the number of twisted yarns (t / m), and D represents the fineness (denier) of the composite false twisted yarn.)
In addition, the method for producing a composite false twisted yarn of the present invention comprises at least two types of thermoplastic synthetic fiber multifilament highly oriented undrawn yarns having different dye selectivity, each having a glass transition point of + 50 ° C. or less with a heating device. It is characterized in that it is stretched separately at this temperature, and then false twisting and entangled fiber mixing are performed in a series of false twisting at a draw ratio of 1.1 times or more.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The composite false twisted yarn of the present invention comprises at least two types of thermoplastic synthetic fiber multifilament yarns having different dye selectivity, and the thermoplastic synthetic fiber multifilament yarn has an entanglement number of 50 to 250 / m. And all the yarns are crimped yarns having thickness spots in the fiber axis direction, and are composite false twisted yarns whose phases of the thick portions are shifted between the respective yarns.
[0010]
That is, at least two types of yarns having different dye selectivity may be used as a means for expressing wrinkles. Therefore, in this invention, a thermoplastic synthetic fiber multifilament yarn is used. For example, nylon fiber yarns dyeable with acid dyes, polyester fiber yarns dyeable with disperse dyes, and the like. The polyester includes a polyester dyeable with a cationic dye having a sulfonate isophthalic acid unit as a copolymerization component. In the present invention, as a synthetic fiber multifilament yarn for thermoplastic synthetic fiber, a polyester fiber yarn mainly dyeable with a cationic dye and a polyester fiber yarn non-dyeable with a cationic dye and dyeable with a disperse dye will be described below. Of course, the present invention is not limited to this.
[0011]
These yarns are crimped yarns having thickness spots in the fiber axis direction. Although there are several methods for providing thickness spots, it is excellent to use thick and thin processing in consideration of providing crimps by false twisting. The chic part of the chic and thin yarn has a low orientation, so that it is easy to adsorb the dye so that it is dyed dark. On the other hand, the thin part is highly oriented and therefore light color because it is difficult to adsorb the dye. That is, it is possible to express a multicolored feeling by giving thickness spots to all the yarns of the cationic dye dyeable polyester fiber yarn and the cationic dye non-dyeable polyester fiber yarn.
[0012]
Although the wrinkle by thick and thin depends on the processing conditions, it is advantageous for the present invention because it has a relatively long shade portion and can easily express the flow wrinkle. Furthermore, it is necessary that the phase of the thick part is shifted between the respective yarns. The phase of the thick part is shifted because the phase of the thick part is irregularly present between the respective yarns, and there is a part that matches very rarely, but most of the part is thick. This means that the phases are different. As will be described later, by adopting such a structure, it is possible to expect a feeling of bulging and an effect on wrinkles by twisted yarn. On the other hand, if the phases are matched, not only these effects cannot be obtained, but the unevenness of the yarn is too large, and the soft feeling is lacking, which is not preferable.
[0013]
The proportion of the cationic dyeable (polyester) fiber yarn is 10 to 90%, more preferably 20 to 80%. When the ratio of the cationic dye-dyeable fiber yarn is less than this, the cationic dye-dyeable yarn is hidden by the entangled mixed fiber, and it is difficult to obtain a polychromatic effect. On the contrary, when the ratio of the cationic dye-dyeable fiber yarn is larger than this, since the cationic dye-dyeable yarn is similarly hidden by the entangled fiber mixture, it is difficult to obtain polychromaticity. In terms of processability, if the ratio of the cationic dyeable fiber yarn is large, fluff is likely to occur, and the strength is greatly decreased as the ratio increases.
[0014]
Next, the composite false twisted yarn of the present invention is given crimp by false twisting in order to give a soft feeling and a swell feeling. The crimp rate is desirably 10% or more, more preferably 18% or more. If the crimp rate is less than this, the soft feeling and the bulging feeling are poor, which is not preferable.
[0015]
In the composite false twisted yarn of the present invention, the substantial yarn length difference between the yarns is preferably 3% or less. The substantial yarn length difference is a difference in total length between the cationic dye dyeable fiber yarn and the cationic dye non-dyeable fiber yarn in the fiber axis direction. In the case of the core-sheath structure, a larger yarn length difference is advantageous for producing a feeling of swelling. However, the composite false twisted yarn of the present invention has a sufficient swell feeling despite the fact that the yarn length difference is substantially 3% or less. This is because all the yarns have thickness irregularities in the direction of the fiber axis, resulting in the generation of voids and the phase of the thick part of each yarn being shifted, and the thick part between each filament. It is important that the phases are mostly in agreement.
[0016]
The thick part (chic part) of each yarn is an incompletely stretched part and has a low orientation compared to the stretched part, and has a high degree of elongation. Conversely, the details (the thin part) are completely stretched parts and highly oriented, That part is relatively low in elongation. For this reason, the highly oriented thin part is formed like a core thread, and the lowly oriented chic part is formed like a sheath thread. Since it occurs in both yarns of cationic dye-dyeable fiber yarns and cationic dye-non-dyeable fiber yarns, a partial core-sheath structure occurs between the yarns, and the parts that are reversed in each part Since a random structure having a reversible yarn length difference is formed, a feeling of swelling can be obtained.
[0017]
Here, the partially reversible yarn length difference means that in the portion where the chic portion and the thin portion are aligned in each yarn, the yarn on the chic portion side is long, and this portion has a yarn length difference.
[0018]
On the other hand, when the chic part and the thin part are reverse threads, the reverse thread is longer. That is, it means that each portion has a yarn length difference, and that the portion has a reversible yarn length difference that becomes a core yarn or a sheath yarn.
[0019]
Next, the composite false twist yarn of the present invention will be specifically described with reference to the drawings.
[0020]
FIG. 1 is a model diagram for explaining the thick and thin in the composite false twisted yarn of the present invention, and FIG. 2 is a model diagram of a yarn in which the phases of the thick and thin are aligned between the yarns.
[0021]
In FIG. 1, a cationic dye-dyeable fiber yarn 1 is composed of a thick portion 3 and a thin portion 4, and a cationic dye-dyeable fiber yarn 2 is composed of a thick portion 5 and a thin portion 6. . Between the filaments of the cationic dye-dyeable fiber yarn 1 and the cationic dye-non-dyeable fiber yarn 2, the phases of the chic portions 3 or 5 are aligned, and the cationic dye-dyeable fiber yarn 1 and Since the phases of the thick part 3 and the thick part 5 are out of phase between the two yarns of the cationic dye-dyeable fiber yarn 2, when viewed in the cross-sectional direction of the composite false twisted yarn, the cationic dye-dyeable fiber yarn The thick portion 3 of the strip 1 and the portion A where the thin portion 6 of the cationic dye-dyeing fiber yarn 2 is present, the thin portion 4 of the cationic dye-dyeable fiber yarn 1, and the cationic dye-dyeing fiber yarn 2 The chic part 5 is formed of a B part.
[0022]
Further, in FIG. 2, as in the case of FIG. 1, the phases of the thick portions 3 or 5 are aligned between the filaments of the cationic dye-dyeable fiber yarn 1 and the cationic dye-non-dyeable fiber yarn 2. However, since the phases of the chic part 3 and the chic part 5 are aligned between the two yarns of the cationic dye-dyeable fiber yarn 1 and the cationic dye-non-dyeable fiber yarn 2, the cross section of the composite false twisted yarn In terms of direction, the chic portion 3 of the cationic dye-dyeable fiber yarn 1 and the C portion where the chic portion 5 of the cationic dye-dyeable fiber yarn 2 is present, and the thin of the cationic dye-dyeable fiber yarn 1 It consists of D part in which the thin part 6 of the part 4 and cationic dye-dyeing fiber yarn 2 exists.
[0023]
The composite false twisted yarn of the present invention can express polychromaticity by mixing most part A and part B and part C part and part D. As shown in FIG. 2, it is obvious that the effect of the present invention cannot be obtained if the structure in which the phases of the thick portions coincide with each other.
[0024]
FIG. 3 is a model diagram for explaining the partially reversible yarn length difference of the composite false twist yarn of the present invention.
[0025]
Since the chic portion having a high degree of elongation is stretched by false twisting, the yarn becomes longer in that portion than the thin portion of the yarn having different dye selectivity. That is, a partial yarn length difference occurs between the thick portion 3 and the thin portion 6 and between the thin portion 4 and the thick portion 5. This will be explained with reference to FIG. 1. In part A, the cationic dye-dyeable fiber yarn 1 becomes a sheath yarn, and the cationic dye-dyeable fiber yarn 2 becomes a core yarn. Conversely, in part B, the cationic dye-dyeable fiber yarn 2 becomes a sheath yarn, and the cationic dye-dyeable fiber yarn 1 becomes a core yarn. Thus, by existing as a core yarn or a sheath yarn in a partial portion, a partially reversible yarn length difference is generated.
[0026]
The yarn according to the present invention does not require an extremely large yarn length difference. Rather, there is a risk that the yarn length difference may cause a feeling of wiping, nep due to ironing, or wrinkle abnormality due to yarn misalignment.
[0027]
Next, the composite false twisted yarn of the present invention needs to be entangled with 50 to 250 entanglements / m. If the entanglement is less than this, sizing is required during aging, which is not only expensive, but also tends to cause poor opening in the loom, resulting in a yarn with very poor high-order passability. Conversely, when there are more entanglements than this, the texture becomes hard, which is not preferable.
[0028]
The number of confounding is derived from a value measured using an entanglement tester NPT-R2040 manufactured by ROTHSCHILD. The measuring method is to run the yarn with a running tension of the measured denier of the yarn × 0.1 g / d, and puncture the needle from below to read the distance to the entanglement point. Set the trip level (entangled point confirmation value) as shown in the following formula.
[0029]
Measurement yarn denier × 0.1 + (measurement yarn denier / measurement filament number) × 2 This is measured 30 times, and an average value of half the entanglement distance is obtained. This distance is doubled to obtain the average number of entanglement distances per meter, but here the length of the entanglement point is very small and is removed, and the average number of entanglement distances is defined as the number of entanglement distances. As described above, the composite false twisted yarn of the present invention is a multicolor flow-tone composite false twisted yarn having a soft and bulging feeling, and is a yarn excellent in cost and high-order passability.
[0030]
Even if the composite false twisted yarn of the present invention is used in a woven or knitted fabric as it is, it can sufficiently express multicolored flow wrinkles, but the flow wrinkles can be further emphasized by further twisting. Usually, when the kite yarn is twisted, it becomes finer as the number of twisted yarns increases, and the effect of the kite becomes very weak. However, in the case of the composite false twisted yarn of the present invention, all the yarns have thick spots due to thick and thin, and the phases of the thick portions are shifted. The chic part (dark color part) that was hidden on the back side appears on the front.
[0031]
FIG. 4 is a model diagram when the composite false twisted yarn of the present invention is twisted, (a) is a non-twisted model diagram further simplifying FIG. 1, and (b) is 400T. (C) is a model diagram when twisted at 800 T / M. The chic part of each yarn covers the outside by winding the thin part of the other yarn. In non-twisting, the chic part is on the back side of the yarn or on the front side, so it is difficult to make a flow tone, but the chic part hidden on the back side of the yarn by twisting becomes a sheath thread Since it comes out and wraps around the table, a wilted tone is obtained.
[0032]
In the present invention, when the number of twisted yarns is further increased, the chic portion surrounds the outside of the yarn like a sheath yarn as shown in FIG. 4. For example, the chic portion of the cationic dyeable dyeable polyester fiber yarn is dyed with a cationic dye. In this case, since the portion becomes a long deeply dyed portion, the flow mist can be further emphasized. The number of twisted yarns is preferably used within the range of the following formula.
[0033]
K ≤ 22000 / D ^1/2
(Where K is the number of twisted yarns (t / m) and D is the fineness (denier) of the composite false twisted yarn).
[0034]
For example, if the yarn is 150 denier, a sufficient multicolor flowing effect can be obtained in the range of about 1800 t / m or less.
[0035]
However, if the phases are the same, the number of twisted yarns is increased and the effect of the wrinkles is reduced.
[0036]
Next, the manufacturing method of the composite false twist yarn of this invention is demonstrated.
[0037]
In the present invention, two or more thermoplastic synthetic fiber multifilament highly oriented unstretched yarns having different dye selectivity are separately stretched at a temperature of glass transition point + 50 ° C. or less with a heating device, and then the draw ratio This is a method for producing a composite false twisted yarn, characterized in that false twisting and entangled mixed fiber processing are performed in a series of false twisting at 1.1 times or more.
[0038]
As before, the polyester fiber yarns that are dyeable with cationic dyes and the polyester fiber yarns that are non-dyeable with cationic dyes and dyeable with disperse dyes will be described. Highly oriented unstretched polyethylene terephthalate dyeable with cationic dye and highly oriented unstretched polyethylene terephthalate undyed with cationic dye are separately drawn at a temperature of + 50 ° C or lower with a heating device. Is to do.
[0039]
The polyethylene terephthalate highly oriented undrawn yarn here is one having a spinning speed of 2000 to 4500 m / min and a birefringence Δn of 0.015 to 0.080. In the present invention, by stretching these separately, the draw ratio suitable for each yarn quality can be selected, and thus a wide variety of combinations are possible. However, if they are drawn and stretched, the processing conditions must be matched to the high spinning speed yarn. It is not preferable because of concern.
[0040]
Further, the stretching temperature needs to be performed at a glass transition point of + 50 ° C. or lower, and if the stretching temperature is higher than this, the wrinkles are weakened, which is not preferable. Further, the drawing temperature may be varied depending on each yarn.
[0041]
Each stretched yarn is combined at a false twist portion, and the combined yarn may be formed after being aligned using a roller before the false twist portion. The draw ratio of drawing false twisting is preferably 1.1 times or more, more preferably 1.1 times or more and 1.3 times or less. When the draw ratio is less than this, the processing becomes unstable depending on the yarn speed, and it is not preferable because many yarn breaks occur. When it exceeds 1.3 times, the chic part is stretched and the wrinkles are weakened by stretching, which is not preferable.
[0042]
The false twisting device may be a pin type, a triaxial circumscribed friction type, a belt nip type, or the like, but a triaxial circumscribed friction type or belt nip type capable of high-speed machining is preferable. In addition, it is necessary to confound the two yarns in order to converge them. The entangled mixed fiber processing may be performed either before or after false twisting. However, when the entangled mixed fiber processing is performed before false twisting, the entangled part is easily detached by subsequent drawing false twisting. It is preferable that the draw ratio is lower. Moreover, the nozzle used for entanglement mixing may be either an air turbulent type such as an interlace nozzle or a taslan nozzle. Further, a heat treatment heater may be used depending on the purpose of use.
[0043]
Here, the manufacturing method of the composite false twist yarn of this invention is demonstrated based on drawing. (A)-(c) of FIG. 5 is process drawing which shows an example of the manufacturing method of the composite false twisted yarn of this invention, respectively.
[0044]
In FIG. 5A, the cationic dye dyeable highly oriented undrawn yarn 7 is made thick and thin between the feed rollers 9 and 10 using a heat pin 18. Similarly, the cationic dye non-dyeing highly oriented undrawn yarn 8 is made thick and thin between the feed rollers 11 and 12 using a heat pin 18. After the respective yarns are combined through the feed roller 13, simultaneous drawing and false twisting is performed between the false twist heater 19, false twist twister 21, and delivery roller 14. Then, the entangled fiber mixing process is performed between the delivery roller 14 and the feed roller 15 by using the entangled fiber mixing nozzle 22, and the wound yarn 17 is wound up to obtain a processed yarn cheese 23.
[0045]
(B) and (c) of FIG. 5 are examples of other production methods of the present invention, (b) is a process of performing entangled mixed fiber processing before false twisting, and (c) Is a heat treatment heater after false twisting and entangled mixed fiber processing. (b) and (c) are appropriately employed in the present invention, and either method can achieve the object of the present invention.
[0046]
【Example】
Next, examples of the multicolor flow string-like composite false twisted yarn of the present invention will be shown, but the present invention is not limited thereto.
[0047]
[Example 1]
Polyethylene terephthalate highly oriented unstretched yarn 130 denier 24 filaments dyeable with cationic dye and polyethylene terephthalate highly oriented unstretched yarn 175 denier 48 filaments non-dyeable with cationic dye, respectively, with a hot pin at 90 ° C. After stretching to 1.55 times and 1.45 times, perform simultaneous false twisting to 1.20 times with a triaxial circumscribed friction false twisting device, then use an interlace nozzle to confound at a processing pressure of 3.0 kg / cm2 and 170 denier 72 A composite false twisted yarn of filament was obtained. This composite false twisted yarn has a thick portion out of phase between the two types of yarns, resulting in a partially reversible yarn length difference of 15.2%, a ratio of cationic dye-dyed yarns of 41%, yarn length The difference was 2.5%, the crimp rate was 20%, and the number of entanglements was 120 pieces / m. The composite false twisted yarn was twisted at 400 T / M and woven at a weave density of 120 × 85 and a weave structure 2/2 twill. Subsequently, weight loss processing, dyeing processing with a cationic dye and a disperse dye were performed. The resulting woven fabric was a multi-colored, wild, flowing sensation and a swelling sensation.
[0048]
[Comparative Example 1]
In the combination of raw yarns of Example 1, first, two types of yarns were aligned and entangled with a processing pressure of 3.0 kg / cm2 using an interlace nozzle, and then stretched by 1.45 times with a hot pin at a temperature of 90 ° C. . Thereafter, simultaneous false twisting was performed at a rate of 1.20 times using a triaxial circumscribed friction false twisting device to obtain a composite false twisted yarn of 175 denier 60 filaments. In this composite false twisted yarn, the phase of the thick part was the same between the two types of yarns, so there was no partial reversible yarn length difference. The ratio of the polyester dye-dyed polyester fiber yarn was 43%, the yarn length difference was 10.5%, the crimping rate was 18%, and the number of entanglements was 90 / m. This composite false twisted yarn was subjected to twisting, weaving and dyeing finishing in the same manner as in Example 1. The resulting woven fabric had a slight wrinkle feeling of 2 to 3 colors at most and had a lower contrast than that of Example 1. Although the texture is soft, it feels a little soft, and there is a part where a slightly nep-like thread is accumulated.
[0049]
[Example 2]
In addition to the combination of the original yarn of Example 1, a polyethylene terephthalate highly flavored drawn yarn 125 denier 18 filament that is not dyeable with a cationic dye is drawn at a temperature of 1.50 times with a hot pin at a temperature of 90 ° C., and then the yarn of Example 1 is used. Stroke and three strands are simultaneously twisted 1.20 times with a triaxial circumscribed friction false twisting device, then entangled with a processing pressure of 4.0 kg / cm2 using an interlace nozzle, and a composite false twisted yarn of 240 denier 90 filaments Got. This composite false twisted yarn is out of phase in the thick part between the three types of yarn, resulting in a partially reversible yarn length difference of 13.8%, a ratio of cationic dye-dyed yarn of 29%, yarn length The difference was 2.5%, the crimp rate was 21%, and the number of entanglements was 120 pieces / m. The composite false twisted yarn was twisted at 400 T / M and woven at a weave density of 105 × 78 in a woven structure 2/2 twill. Subsequently, weight loss processing, dyeing processing with a cationic dye and a disperse dye were performed. The obtained woven fabric was a woven fabric having a multicolored natural hue, a flowing sensation, an appropriate elasticity, softness and swell.
[0050]
[Example 3]
Polyethylene terephthalate highly oriented unstretched yarn 250 denier 30 filaments dyeable with cationic dye and polyethylene terephthalate highly oriented unstretched yarn 60 denier 72 filaments non-dyeing to cationic dye with hot pins at 90 ° C, respectively After stretching to 1.50 times and 1.45 times, they are aligned and interlaced at a processing pressure of 3.5 kg / cm2 using an interlace nozzle, then subjected to simultaneous false twisting at a belt nip false twisting device of 1.15 times, 180 A composite false twisted yarn of denier 102 filament was obtained. In this composite false twisted yarn, the phase of the thick part is shifted between the two types of yarns, resulting in a partially reversible yarn length difference of 12.9%, a ratio of cationic dyeable yarns of 80%, and a yarn length difference of 1.0. %, Crimp rate 18%, and number of entanglements 100 / m. The composite false twisted yarn was knitted with a tengu structure without twisting. Subsequently, weight loss processing, dyeing processing with a cationic dye and a disperse dye were performed. The resulting knitted fabric had a high ratio of cationic dyeable dye yarns, so that an elegant multi-color effect in which there was an elegant flow-like wrinkle and various cationic dye-dyed yarns were obtained. In addition, the texture was soft, moderate swell and dry feeling due to the cation effect, and it was a high-quality knitted fabric.
[0051]
【The invention's effect】
According to the present invention, the composite false-twisted yarn has a partially reversible yarn length difference that occurs due to a phase shift of the thick portion between two or more types of yarns having different dye selection systems. In addition, this composite false twisted yarn is untwisted or twisted with K ≤ 22000 / D1 / ² , and then used for warp or weft or both warp and weft. It is possible to obtain a woven or knitted fabric having a wild and flowing feeling and a soft and sufficient swell feeling.
[0052]
In addition, by using the production method of the present invention, for example, since various stretching is possible according to the physical properties of each yarn at the time of thick spot imparting processing, various combinations are possible. Moreover, it is very economical by carrying out a series of false twist processing of thickness unevenness imparting processing, entangled fiber mixing processing and stretch false twist processing.
[Brief description of the drawings]
FIG. 1 is a model diagram for explaining thick and thin in a composite false twisted yarn of the present invention.
FIG. 2 is a model diagram of a yarn in which chic and thin phases are aligned between yarns.
FIG. 3 is a model diagram for explaining a partially reversible yarn length difference of the composite false twist yarn of the present invention.
FIG. 4 is a model diagram when twisting the composite false twisted yarn of the present invention.
FIGS. 5A to 5C are process diagrams illustrating an example of a method for producing a composite false twisted yarn according to the present invention.
[Explanation of symbols]
1: Cationic dye dyeable fiber yarn
2: Cationic dye-dyeing yarn
3: Chic part
4: Thin part
5: Chic part
6: Thin part
7: Cationic dye dyeable highly oriented undrawn yarn
8: Highly oriented undrawn yarn with cationic dye
9: Feed roller
10: Feed roller
11: Feed roller
12: Feed roller
13: Feed roller
14: Delivery roller
15: Feed roller
16: Feed roller
17: Winding roller
18: Thermal pin
19: False twist heater
20: Heat treatment heater
21: False twister
22: Entangled fiber nozzle
23: Processed cheese

Claims (6)

 It consists of at least two types of thermoplastic synthetic fiber multifilament yarns with different dye selectivity. The composite false twisted yarn is characterized in that the yarn is a crimped yarn having a thickness variation in the fiber axis direction, and the phase of the thick portion is shifted between the respective yarns.  The thermoplastic synthetic fiber multifilament yarn has thick spots due to thick and thin in the fiber axis direction, and most of the phases of the thick portions between the filaments of the respective yarns coincide with each other. The composite false twisted yarn according to claim 1, wherein the yarn structure has a partially reversible yarn length difference.  The cationic dyeable yarn is contained in an amount of 10 to 90% by weight, the crimp rate is 10% or more, and a substantial yarn length difference between the yarns is 3% or less. Composite false twisted yarn. A composite false twisted yarn obtained by twisting the composite false twisted yarn according to any one of claims 1 to 3 within the range of the following formula.
K ≦ 22000 / D ^1/2 (where K is the number of twisted yarns (t / m) and D is the fineness (denier) of the composite false twisted yarn) At least two types of thermoplastic synthetic fiber multifilament highly oriented undrawn yarns with different dye selectivity are drawn separately at a temperature of glass transition point + 50 ° C or less with a heating device, and then draw ratio 1.1 times The method for producing a composite false twisted yarn according to any one of claims 1 to 4 , wherein false twisting and entangled mixed fiber processing are performed in a series of false twisting.  A woven or knitted fabric using the composite false twisted yarn or the composite false twisted yarn according to any one of claims 1 to 4 for warp or weft, or both warp and weft.

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