JPS6327458B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite textured yarn that is made of a false twisted yarn made of thermoplastic synthetic fibers having a difference in yarn length and has a two-layer structure, and a method for producing the same.

Many proposals have been made regarding composite textured yarns having such yarn length differences and their manufacturing methods, but all of these have problems such as a decrease in yarn quality due to yarn layer misalignment, poor yarn unwinding, and twisting. It has some practical drawbacks such as poor processability in the process or weaving and weaving process, lack of volume, and bulkiness. For example, in the yarn of Special Publication No. 51-34020, the amount of wound yarn supplied to the core yarn is too large, and there is almost no entanglement between the filaments, so the wound yarn is squeezed during the twisting or weaving process, resulting in a net-like shape. Easy to cause defects, JP-A-52-110958
The yarn proposed in the above issue can be obtained by performing a fluid treatment after false twisting, but since the fluid treatment is simply a fluid entangling treatment, a so-called interlacing treatment, bulkiness and volume cannot be obtained. Furthermore, compared to the yarn that is not subjected to the interlacing treatment as in the above-mentioned Japanese Patent Publication No. 51-34020, although the deviation of the wound yarn due to ironing is greatly improved,
Because the filaments of the core yarn and wound yarn are not entangled with each other in the unentangled part, and the difference in yarn length is too large,
Movement of the wound yarn in the unentangled portion is unavoidable, which poses difficulties in handling the yarn in subsequent processes. Especially the twisting process,
This problem is serious when the ironing is relatively strong, such as when inserting the weft using a rapier loom. In addition, special public service in 1973-
The yarn obtained by the method of No. 1856 has excellent bulk and volume, but since many loops and slacks occur throughout the yarn, when it is made into a fabric, the loops and slacks are caught. A snapping phenomenon may occur due to drying, and a strong rough or Hershey feel may occur, making it difficult to obtain a desirable tactile sensation. Also, the yarn unwinding property is poor,
It has drawbacks such as poor thread passing through subsequent processes such as the twisting process or the weaving and weaving process.

The present invention eliminates the drawbacks of the prior art, has a soft texture, has excellent volume and elasticity, is extremely easy to handle in subsequent processes such as twisting, weaving and weaving, has stable quality, and has high speed. The object of the present invention is to provide a processed yarn that can be processed by the method and a method for producing the processed yarn.

The present invention has the following configuration to achieve the above object. That is, the present invention consists of a false twisted yarn made of two or more types of thermoplastic synthetic fibers having different crimp properties, in which at least one type of multifilament yarn is used as a core and at least one other type of multifilament yarn is loosely wound in a large wave shape. It is a spinning composite yarn that alternately forms tightly intertwined bundled parts A and bundled parts B that are bundled without being tightly intertwined, and the ratio of bundled parts B to the bundled part A is higher than that of the bundled parts A. ,
Mainly, the focusing part B has a loop and a slack,
It is a composite processed yarn characterized in that most of the loops and slack are generated in the wound yarn, and its manufacturing method involves using at least two multifilament yarns of thermoplastic synthetic fibers of the same or different types in different ways. Multifilament yarn with a low feed rate can be used as a core yarn by feeding it to the same spindle at a feed rate, performing a false twisting process, followed by an interlacing process, and then or simultaneously applying a jet jet disturbance process. A converging part A in which a multifilament yarn with a high feed rate is loosely wound in a large wave shape and each single filament is strongly intertwined along the longitudinal direction of the yarn, and a converging part B in which the single filaments are converged without being tightly intertwined. and focusing part B alternately.
In addition, loops and slacks are mainly caused in the wound yarn of the converging portion B.

Here, the tightly intertwined convergence part A means that the winding yarn is not tightly wound around the core yarn, but is relatively arranged in the outer layer, and the core yarn and the winding yarn are almost completely entangled to the extent that they cannot be separated. This refers to the part where single filaments are intertwined. In addition, the bundled part B, which is tightly bundled without being entangled, refers to a part where mainly a part of the single filaments of the wound yarn are slightly entangled to the extent that the core yarn and the wound yarn can be separated. .

As shown in Fig. 1, the composite processed yarn of the present invention has a core yarn and a winding yarn that is very loosely (roughly) shaped like a large wave.
It's rolling. When this winding density becomes high, the entire yarn is tightened and not only becomes coarse and hard, but also has poor volume and elasticity.

Further, the composite textured yarn of the present invention has a bundled part A and a bundled part B, and the bundled part A is necessary to prevent displacement of the yarn layers and to form the bundled part B.
In this case, it is desirable that the length of A be as short as possible, preferably 10 mm or less. That is, if the length of A becomes longer, the two-layer structure and the span-like effect due to loop formation will deteriorate, which is not preferable. In addition, in the present invention, it is necessary to increase the ratio of B compared to A, and thereby,
The span-like effect described above can be further promoted. According to the experimental results of the present inventors, B
It is preferable that the ratio is 50 to 80%.

Next, the features and effects of the present invention will be described.

The composite processed yarn of the present invention has no rough feeling, is soft, has excellent elasticity, volume, and warm taste, and in addition exhibits an extremely favorable drapability. Furthermore, since the yarn has excellent shape retention and yarn unwinding properties, the yarn is easy to handle in subsequent processes such as twisting, weaving, and weaving. These effects are obtained by the synergistic effect of the above configurations. In other words, the composite textured yarn of the present invention has a two-layer structure made of false twisted yarn with differences in yarn length and crimpability, and the synergistic effect of appropriately generated loops and slack, resulting in elasticity, volume, and warmth. It gives flavor.

It is composed of a core yarn and a wound yarn, and the crimpability of the core yarn is extremely low compared to that of a wound yarn, and there is a strong interlaced bundle with almost no loops or slack, and a bundle that is firmly bundled without entanglement. By having loops and slack alternately along the longitudinal direction of the yarn, and by causing loops and slack to occur moderately in the wound yarn mainly in the bundled portion without being tightly entangled, the conventional loop , rough feeling of slack yarn, Hershey feeling,
This eliminates the snap phenomenon and adds softness and drapeability.

As mentioned above, the yarn alternately has strongly entangled converging parts and converging parts that are tightly converged without being intertwined, and there are almost no loops or slacks in the former, and they mainly occur in the latter wound yarn. Therefore, the number of loops and slacks in the yarn as a whole is small, and even in the latter, some of the single filaments are slightly entangled, so the yarn unwinding property is extremely good. In the twisting process or the knitting and weaving process, loops and slack do not disappear, and the yarn layers do not shift, resulting in excellent morphological stability. When made into fabric, it has effects such as good snackability and pilling performance.

Next, the method for manufacturing the composite textured yarn of the present invention will be described in detail.

In the method of the present invention, first, two or more types of multifilament yarns are fed to the same spindle at different feed rates and subjected to false twisting, thereby imparting yarn length differences and crimp differences. That is, a multifilament yarn with a high feed rate is wound using a multifilament yarn with a low feed rate as a core yarn, and the core yarn becomes a yarn whose crimpability is significantly lower than that of the wound yarn. In this case, if the overfeed rate difference becomes too large (overfeed rate difference 20 to 50%), the wound yarn will shift in areas that are not tightly entangled due to the squeezing during the yarn twisting process or the weaving and weaving process, resulting in a napped shape. causes the disadvantages of If the overfeed rate difference becomes even larger (overfeed rate difference of 60% or more), the object of the present invention will not be achieved because the yarn will become a slub yarn having single-wrap portions and triple-wrap portions alternately in the longitudinal direction of the yarn. .

On the other hand, if the feed rate difference is too small, the yarn length difference and crimp difference will be small, resulting in poor volume and elasticity. Therefore, it is necessary to supply the core yarn and the wound yarn by taking these into consideration, but according to the experimental results of the present inventors, the overfeed rate difference between the core yarn and the wound yarn is 4 to 10%. It is preferable to supply it in such a way that

Next, an entangling process and a jet jet disturbance process are successively performed to intermittently generate strong entangled convergence parts, and to create loops and slack in some of the threads in the convergence areas. Here, entanglement processing is defined as creating a vortex by injecting fluid from one or more fluid introduction holes in a direction perpendicular to or at an appropriate angle to the axis of the yarn running in the thread passing hole of the nozzle. Disturbance treatment involves injecting high-speed fluid in the cross-sectional direction of a yarn running in an almost tension-free state. Specifically, the multifilament yarn is supplied to a nozzle, and the yarn is guided in a direction almost perpendicular to the fluid jetting direction at the yarn outlet of the nozzle, and the multifilament yarn is opened to form a structure. The aim is to impart twistability and slack to some or most of the single filaments.

The entangling treatment and the jet jet disturbance treatment allow individual filaments to be partially entangled without forming loops or sagging when any single multifilament yarn is processed at a low overfeed rate of 2% or less. When processed at a high overfeed rate, a nozzle that forms loops or slacks, for example, as shown in Figure 3, the fluid collides with the running yarn at an angle of 45 to 70 degrees, causing the yarn threading hole to collapse. Using a nozzle having fluid introduction holes 11 and 11' in which a vortex is generated at 8, and a streamlined thread passage hole 8 that gradually opens larger from the inlet side 9 to the outlet side 10 of the yarn,
It is preferable to perform the entanglement process and the generation of loops and slacks at the same time in terms of simplifying the equipment, saving power, and improving processing operability.

It is also possible to carry out the interlacing process using a conventionally used interlacing nozzle, and then use a Taslan nozzle to create loops and slack, but in this case, the method is such that loops and slack are not generated throughout the yarn. It is necessary to appropriately select conditions such as low overfeed rate and low pressure.

FIG. 2 is a schematic diagram showing one embodiment of an apparatus specifically implementing the method of the present invention. Yarn Y ₁ and Y ₂
are actively fed by feed rollers 1 and 2, respectively. In this case, the yarn _Y2 is supplied in excess so that the difference between the overfeed rate of the yarn Y2 and the overfeed rate of _the yarn _Y1 is 4 to 10%. Both yarns are combined by a guide 3 and false-twisted and crimped by a twist-fixing heater 4 and a false-twisting spindle 5, but because the feeding rates of yarns _Y1 and _Y2 are different, , becomes a crimped yarn in which yarn Y ₂ is wound around yarn Y ₁ as a core yarn,
It is sent out by the first delivery roller 6.
The yarn is then continuously introduced into the nozzle 7.

Since the yarn sent out by the first delivery roller 6 is unstable in shape, care must be taken to prevent the yarn from being squeezed by a guide, bar, etc. before being introduced into the nozzle 7, It is continuously introduced into the nozzle 7 without winding it up. A method in which the yarn is wound onto a cheese, bobbin, etc. and then fed to the nozzle does not give good results because the core yarn and the wound yarn may separate or become a slab-like ball.

In addition, the difference in overfeed rate between core yarn and wound yarn is
If it exceeds 10%, it becomes difficult to carry out continuous treatment.

The yarn introduced into the nozzle 7 is subjected to the above-mentioned entangling process and loop formation, and becomes a yarn with a stable shape.The yarn is taken up by the second delivery roller 12, and then wound around the package cage 14 by the winding roller 13. .

The yarn thus obtained is as shown in Figure 1.
A bundled part A in which the yarn _Y2 is loosely wound in a large wave shape around the yarn _Y1 as a core, and the individual single filaments are tightly intertwined; and a bundled part B in which the individual single filaments are bundled without being tightly entangled. are formed alternately, and the proportion of the bundled part B is higher than that of the bundled part A, and the bundled part B mainly has loops and slack, and most of the loops and slack are generated in the wound yarn. There is.

The thermoplastic synthetic fibers used in the present invention may have the same composition, physical properties, dyeability, cross-sectional shape, fineness, and gloss, or may be different. In particular, a combination of different finenesses may be used as single yarns of wound yarn. When the denier is 2d or less, a product with excellent drapability can be obtained.

Examples will be described below, but the present application is not limited thereto.

Example 1 Polyester multifilament 150d/48f as supply yarn Y ₁ , cationic dyeable polyester multifilament 100d/48f as supply yarn Y ₂ ,
Using the equipment shown in Figs. 2 and 3, the spindle rotation speed was 21.6 x 10 ⁴ rpm, and the number of false twists was
1800zT/M, heater temperature 210℃, supply yarn Y ₁
overfeed rate of 1%, overfeed rate of supplied yarn Y ₂ 8%, overfeed rate of fluid (air) processing zone 6%, nozzle pressure 7Kg/cm ² ,
Yarn processing was carried out at a peripheral speed of 120 m/min of the first delivery roller to obtain a composite processed yarn as shown in FIG. The composite processed yarn had a two-layer structure in which the core yarn was a normal polyester yarn _Y1 and the wound yarn was a cationic dyeable polyester yarn _Y2 .

As a result of weaving using the composite processed yarn in the warp and weft and dyeing it, a heathered product with a soft texture and excellent elasticity and volume was obtained.

Example 2 Using the same apparatus as in Example ₁ , polyester 75d/24f bright yarn was supplied as Y1, polyester 75d/36f bright yarn was supplied as _Y2 , and the spindle rotation speed was 46.2×10 ⁴ rpm and the number of false twists. ^2100z T/M,
Heater temperature 230℃, Y ₁ overfeed rate 2
%, Y ₂ overfeed rate 10%, fluid treatment zone overfeed rate 4%, nozzle pressure 5
The yarn was processed under the conditions of Kg/cm ² and first delivery yarn speed of 220 m/min to obtain a composite processed yarn as shown in FIG. As a result of manufacturing a woven product using the composite processed yarn in warp, weft, and weft patterns, the product was soft, taut, had excellent stiffness, and exhibited an unprecedented spun-like texture.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a composite textured yarn obtained by the method of the present invention, in which A shows a tightly entangled bundle, and B shows a bundle that is bundled without being tightly entangled. FIG. 2 shows one embodiment of the apparatus used for manufacturing the composite textured yarn of the present invention, and FIG. 3 is a schematic diagram showing one embodiment of the nozzle 7 in FIG. is a side view. Y ₁ and Y ₂ are supply yarns, 1 and 2 are feed rollers, 3 is a guide, 4 is a twist fixing heater, 5 is a false twist spindle, 6 is a first delivery roller, 7 is a nozzle, and 12 is a second 2 a delivery roller, 13 a take-up roller, and 14 a package.

Claims (1)

[Scope of Claims] 1. Consists of a false twisted yarn of two or more types of thermoplastic synthetic fibers having different crimp properties, with at least one type of multifilament yarn as a core and at least one other type of multifilament yarn in a large wavy shape. It is a composite yarn that is loosely wound around the yarn, and has a tightly intertwined bundle part A and a tightly bundled bundle part B that is not tightly intertwined. A composite textured yarn characterized in that the converging portion B has a high proportion and mainly has loops and slacks, and most of the loops and slacks are generated in the wound yarn. 2 At least two multifilament yarns of thermoplastic synthetic fibers of the same type or different types are fed to the same spindle at different feed rates and subjected to false twisting, followed by continuous entangling treatment, and then or simultaneously jet jet disturbance. By applying the treatment, the multifilament yarn with a low feed rate is used as a core yarn, and the multifilament yarn with a high feed rate is loosely wound in a large wave shape, and each single filament yarn is strengthened along the longitudinal direction of the yarn. The bundled parts A, which are entangled with each other, and the bundled parts B, which are bundled without tightly intertwining, are formed alternately, and the ratio occupied by the bundled parts B is increased, and further, the winding yarn of the bundled part B is mainly A method for producing composite processed yarn characterized by generating loops and slack. 3. The method for producing a composite processed yarn according to claim 2, wherein the overfeed rate difference between at least two thermoplastic synthetic fibers of the same or different types is 4 to 10%.