JPH0411035A - Elastic interlace-processed yarn and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject processed yarn avoidable of slipping or running comprising specific elastic yarn as core yarn and plural continuous filament yarn as sheath yarn by interlacing and combining said elastic yarn and said filament yarn. CONSTITUTION:Elastic yarn 11 in a stretched state by drawn at <=300% drafting ratio and plural continuous filament yarn I and II are parallelized and fed into a fluid-interlacing treatment zone at <=5% overfeed ratio, then said elastic yarn and said plural continuous filament yarn are interlaced and combined to afford the aimed processed yarn 10 comprising said elastic yarn as core yarn and said continuous filament yarn as sheath yarn.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an elastic intertwined processed yarn formed by covering an elastic yarn as a core yarn with a plurality of filament yarns as a sheath yarn, and a method for producing the same. More specifically, in providing a fabric with excellent elasticity, we will address the drawbacks represented by the slip-in of elastic threads from the sewing cut ends, especially the slip-in of fabrics using long filament yarns (including loose stitches), and jersey knitting. The present invention relates to an elastic intertwined yarn that can avoid ground runs, etc., and a method for manufacturing the same.

[Conventional technology]

Conventionally, the following types of covered elastic yarns are known.

■ There are covering yarns in which elastic threads, especially polyurethane threads, are used as core threads, and nylon threads or woolly nylon threads are wound horizontally around the core threads, or are pulled and twisted together. Since this covering yarn has a glossy surface and is rich in stretchability, it is frequently used in innerwear, leg knits, outerwear (eg, swimsuits, leotards), and the like.

■ Polyurethane yarn and thermoplastic synthetic fiber multifilament are aligned and fed to the same false twisting device,
Covered elastic yarns subjected to heat setting and untwisting are disclosed, for example, in Japanese Patent Publication No. 57-8129, and are used as novel stretch yarns that produce an ultra-soft touch texture for leg knits (e.g., tights) and outerwear ( for example,
swimwear), etc.

■ Elastic threads such as polyurethane threads and filament threads (
In particular, covered elastic yarns made by aligning false-twisted crimped yarns and mixing and entangling them by agitating them with an air nozzle are disclosed in, for example, JP-A-60-193839 and JP-A-64-245.
837, etc., and development is progressing further with the aim of improving productivity.

[Problem to be solved by the invention]

Regarding conventional coated elastic yarns, the above yarn (■) can only be produced at an extremely low speed, and the above (■) yarn has a significant decrease in stretch power due to the low heat resistance of polyurethane at the false twist setting temperature, and is bulky. There are still many problems with the yarn mentioned above, such as the fact that it is too soft and cannot be rewinded and can easily cause spandex yarn breakage. There were unresolved issues such as poor fiber entanglement, exposing the core yarn, and weak entanglement strength, which meant that high productivity could not be fully absorbed, and there were many restrictions on the development of applications. This invention overcomes the drawbacks of the above-mentioned conventional yarns, improves the entanglement strength, and prevents the core yarn from being exposed and getting caught in guides even when it is squeezed during the preparation process or knitting process. Since there is no unraveling defect, there are no problems that are common with fabrics with excellent elasticity, such as slippage (including sagging) of fabrics using long fiber filament yarns and run of jersey knitted fabrics. The first object of the present invention is to provide an elastic intertwined yarn that gives a uniform product, and the second object is to provide a method for easily producing such an elastic intertwined yarn.

[Means to solve the problem]

In order to solve the above first problem, the elastic intertwined yarn according to the present invention has an elastic yarn as a core yarn and a plurality of long filament yarns as a sheath yarn, An intertwined part in which the fiber filament system is intertwined and a spread part in which at least one of the plurality of long fiber filament yarns bulges out around the elastic yarn are alternately provided in the length direction. and the number of intertwined parts is 80 to 1801
It is assumed to be in the range of hard/m.

Further, in order to solve the above second problem, the method for producing an elastic intertwined processed yarn according to the present invention includes an elastic yarn in a stretched state by being drawn at a draft magnification of 300% or less, and a plurality of long fiber filaments. By aligning the yarns and supplying them to a fluid entanglement treatment zone at an overfeed rate of 5% or less, and intertwining and mixing the elastic yarns with a plurality of long fiber filament yarns, the elastic yarns become core yarns, An elastic intertwined yarn is obtained in which the plurality of long fiber filament yarns serve as sheath yarns.

The elastic intertwined yarn of the present invention has a core-sheath structure in which an elastic yarn is used as a core yarn and a plurality of long fiber filament yarns are used as a sheath yarn. has. The intertwined part (also called the bundled part) is a part where multiple long fiber filament yarns are tightly interlaced with the elastic yarn that is the core yarn, and the spread part is a part where multiple filament yarns are tightly interlaced around the elastic yarn, which is the core yarn. This is the part where one or more of the long fiber filament yarns of the book bulge out. In the elastic intertwined yarn of the present invention, the number of intertwined portions must be in the range of 80 to 180 pieces/m, preferably 140 to 160 pieces/m. If the number of intertwined parts is less than 80, the convergence, that is, the ability to mix and intertwine the fibers, will not be sufficient, and the intertwining strength will be poor, resulting in poor unwinding during knitting and runs in the circular knitted fabric. In addition, when the number of intertwined parts exceeds 180 pieces/m, the convergence becomes too strong,
When made into a product, it tends to cause problems such as deterioration of stretchability and surface quality.

The elastic threads used in this invention include polyurethane elastic threads, polyester elastic threads, polyamide elastic threads, and the like. The denier of the elastic yarn is 15 to 140.
Denier is preferred, with 20 to 70 denier being particularly preferred for outerwear such as swimsuits (including seawater pants) and leotards that require soft elasticity, and 40 to 140 denier being more preferred for foundations that require a sense of fissotones. . If the denier of the elastic thread is larger than these ranges, the binding force will be too strong and the fit will be poor, which may cause discomfort. If it is small, it will lack durability and will easily cause scratches if it gets caught when worn. There is a risk of Further, the elongation at break is preferably 400% or more. Breaking elongation is 400
If it is less than %, the elastic yarn will break relatively easily (“core breakage”).
).

The long fiber filament yarns used in this invention include filament yarns made of polyamide, polyester, acrylic, polypropylene, vinyl chloride, etc., and bulky crimped yarns thereof such as false-twisted, crimped, and shaped crimped yarns. It will be done. In particular, high-shrinkage nylon yarns of copolymer type containing a third component with a boiling water shrinkage rate of around 20-30% and crimped nylon yarns with a single yarn denier of 1.5 deniers or less have good performance (e.g. , strong confounding, etc.).

A composite spun filament consisting of a polyester component and a polyamide component is used as the long fiber filament yarn, and after knitting and weaving, the polyamide component is melted to soften the fabric and prevent slips and runs. becomes possible. Nylon 6 components and nylon 6
Six-component composite spun filaments can also be used for similar purposes, providing higher levels of entanglement.

In this invention, two or more long fiber filament yarns are used, and the number can be appropriately set depending on the purpose and the like. The multiple filament yarns may be of the same denier, material, and number of filaments, or may be different in one or more of these, depending on the purpose. The combination can be set as appropriate.

In addition, in this invention, the method of setting the denier number and the number of filaments of each of the plurality of long fiber filament yarns is, for example, as follows.

For clothing applications, the number of long filament yarns is preferably 3 to 4 to provide a combination of properties and performance.
On the other hand, if even one of the plurality of threads breaks midway, the operating rate decreases, which is undesirable. The torque denier may be at least 10 to 200 denier, and the single yarn denier is preferably 2 denier or less. In other words, a large number of filaments is preferable because it facilitates entanglement.

In addition, in this invention, a plurality of long fiber filament yarns are used, and one long fiber filament having the same denier number and the same number of filaments as the total denier number and number of filaments of the plurality of long fiber filament yarns is used. The reason why thread is not used is as follows. By using multiple long fiber filament yarns,
The amount of intertwining and mixing of the fibers in the elastic yarn increases, making it easier to improve the covering properties. This is to suppress surface exposure of the elastic thread as much as possible.

Next, a method for manufacturing the elastic intertwined yarn of the present invention will be explained.

One method for producing the elastic intertwined yarn of the present invention includes a draft zone in which the elastic yarn is stretched within 300%;
This is followed by an entangling treatment zone with an entangling nozzle.

The long fiber filament yarn is fed on one side independently from the primary draft zone of the elastic yarn and fed to the entangling treatment zone. The other long-fiber filament yarn is supplied to another draft zone provided completely independently of the elastic yarn and the one long-fiber filament yarn, and after reaching a predetermined feed rate, it is supplied to the entangling treatment zone. Then, the above-mentioned elastic yarn and one of the long fiber filament yarns are intertwined and mixed.

In the above method for producing elastic intertwined yarn, one of the elastic yarns is
Next draft multiplier must be 300% or less, 15
It is preferably 0% or more.

When the primary draft magnification exceeds 300%, there is a problem in that the tension generated in the elastic yarn becomes abrupt and the entangling performance is extremely reduced. Moreover, if it is less than 150%, the tension of the elastic thread is too low and there is a risk that the surface will be exposed. When the obtained elastic intertwined yarn is used for textiles, the primary draft magnification of the elastic yarn is preferably 180 to 200%, and for circular knitting, it is more preferably in the range of 150 to 270%.

In addition, when feeding the other long fiber filament yarn to the entangling treatment zone, in another draft zone provided completely independently of the elastic yarn and the one long fiber filament yarn, - once a predetermined feed rate is reached. When adjusted and supplied to the entanglement processing zone, it is possible to have a desired difference in the overfeed rate of multiple long fiber filament yarns, and it is possible to set the yarn length difference between the long fiber filament yarns as appropriate. It is. In addition, before being supplied to the entangling treatment zone, the difference in the feed rate of the plurality of long fiber filament yarns is 5% or less (i.e., the difference in the feeding rate of the plurality of long fiber filament yarns is 5% or less (i.e., the difference in the feed rate of the other long fiber filament yarn is 5%
The underfeed rate must be as follows.

If the difference in feed rate is greater than 5%, there is a risk that the entangling property will be reduced and a long spread portion will occur.

In the above-mentioned entanglement processing zone, it is effective to adjust the roller speed so that the overfeed rate is 5% or less in order to firmly maintain entanglement and mixed fibers.

By the manufacturing method of the present invention, the above-mentioned elastic intertwined yarn of the present invention can be obtained. This elastic intertwined yarn can be used for both woven and knitted fabrics.

[For production]

According to this invention, by mixing two or more long fiber filament yarns (these are inelastic yarns) as sheath yarns, a high degree of entanglement is achieved, the interwoven yarns are well-combined, and have excellent elasticity. An elastic intertwined yarn is obtained. Therefore, even when the elastic intertwined yarn of the present invention is squeezed during the preparation process, weaving and knitting process, etc., there is no concern that it will get caught, the core and sheath will be misaligned, or the elastic yarn of the core yarn will break. do not have. When the elastic intertwined yarn of the present invention is used, it is possible to obtain extremely good fabrics with less occurrence of slips (including loose stitches) in woven fabrics and runs in jersey knitted fabrics.

Further, according to the manufacturing method of the present invention, it is possible to easily manufacture the elastic intertwined yarn as described above.

〔Example〕

Hereinafter, the elastic intertwined yarn of the present invention will be explained based on the embodiments shown in the drawings, but the invention is not limited to what is shown in the drawings.

FIG. 1 is an enlarged side view showing one embodiment of the elastic intertwined yarn of the present invention under tension (for example, tension of 0.1 g/denier).

As shown in FIG. 1, in this elastic intertwined yarn 10, the elastic yarn 11 exists in the core part, and the two long fiber filament yarns I and ■ constituting the sheath part are intertwined parts a, , at, a
, ,...' and the opening section, , kl! , "' are formed alternately in the length direction of the yarn to cover the elastic yarn 11. In this example, one of the two long fiber filament yarns is l @It is a compressed yarn.

The intertwined part aI,at,'' and the opening part, ,b,,
The length of the intertwined portions a+, al, . . . is clearly longer, but the repeating unit length is not necessarily constant because it occurs randomly. Two intertwined parts (for example, intertwined parts a and at) that are adjacent to each other with one spread part in between have a left and right opposite twist structure with the spread part between them (for example, spread part S) as a boundary. It has become. In other words, the right-twist entangled portions al, . . . and the left-twist entangled portions as, .
..., by repeating the intertwining and mixing of fibers in the opening section S, , b2, the magnitude of the overall torque of the elastic intertwined yarn consisting of multiple threads is compared to that of, for example, a spindle type woolly false twisted yarn. The fibers are also minute, which can be said to be one of the characteristics of the entangled/mixed fiber type. The entangled portion forms a twisted structure, for example, by the fluid pressure of the entangled nozzle during the entangling process or by the long fiber filament yarn containing one crimped yarn, and the left twist, right twist, etc. Balance by twisting.

In the twisted part, both or one of the two long fiber filament yarns I and ■ are strongly entangled with the elastic yarn 11, and the two long fiber filament yarns ■ and ■ are strongly entangled with each other. The heated state is formed by heating or opening the fibers, and the elastic yarns 11 are intertwined and mixed therein.

On the other hand, the bulging spread part is located in the spread part of one long fiber filament yarn next summer, but the spread part of the other long fiber filament yarn ■ is combined, or there are some intertwined parts. Elastic yarn 11 is intertwined and mixed in the long fiber filament yarn (2). Also in the spread portion, the two long fiber filament yarns (■) and (2) may be strongly intertwined with each other, or may be spread. Since the fibers can spread freely in the opening section, two long fiber filament yarns are used! and ■ are mixed without arrangement.

In addition, although the elastic yarn 11 forms a core, it may meander relatively in the strong part of the intertwined part (see Fig. 2 (a)), or shrink in a straight line in the large part of the spread part. ,
In other parts, it is relatively straight, and is often in a -partially extended state.

Fig. 2 is an enlarged side view of the elastic intertwined yarn of the present invention under no tension, and Fig. 2 i8) shows the entangled portion;
) indicates the opening part.

As shown in Figure 2 (a), at the intertwined part, the long fiber filament yarn I and the crimped long fiber filament yarn ■ are both in a heated state, and most of them are bundled. It is partially mixed with open parts of long fiber filament yarn. Also, the elastic thread 11 is completely covered and not exposed. Since the tightly intertwined parts, that is, the right-twist intertwined part and the left-twist intertwined part, have a twisted structure, the yarns are aligned and form a spring-like aggregate, and the crimp force is large. This crimping force generates torque, but since the adjacent spread portions absorb the torque, almost no torque is generated in the elastic intertwined yarn as a whole.

As shown in Fig. 2(b), in the spread part, the spread part of the long fiber filament yarn I overlaps with the spread part of the long fiber filament yarn ■, which is a crimped yarn, and shows a large spread. Most of the fibers are opened, but there are some intertwined parts of long filament yarns. The elastic thread 11 forms a core.

In addition, the spread part is divided into individual yarns, and sufficient crimp expression is observed, and even though the directions of crimp are disparate, and there are intertwined parts of crimped yarns in some parts, the torque is hardly affected. (In this example, the yarn length difference is longer for long fiber filament yarn (1), which is a shrunken yarn).

One of the features of the elastic intertwined processed yarn of the present invention is that the elastic yarn forms the core, and the plurality of long fiber filament yarns forming the sheath are intertwined/mixed fibers having intertwined parts and spread parts alternately. It is a yarn, and its characteristic structure is created by multiple long fiber filament yarns. The intertwined part of the long fiber filament yarn is intertwined with the spread part of the other long fiber filament yarn, or the spread part of the long fiber filament yarn is intertwined with the spread part of the other long fiber filament yarn. Fibers are intertwined and mixed. Furthermore, in the intertwined portion, all long fiber filament yarns and elastic yarns are tightly intertwined and mixed.

Furthermore, since a plurality of long fiber filaments are used, even if any one of the threads is fully stretched, the other threads bulge out in an arch shape.

Here, an example of a combination of a plurality of long fiber filament yarns serving as sheath yarns will be shown. FIG. 3(a) shows that two long fiber filament yarns constituting the sheath part of the elastic intertwined yarn 100 of the present invention are a raw yarn (i is an unprocessed yarn) 21 and a crimped yarn 22. Indicates a combination of FIG. 3(b) shows a case where the two long fiber filament yarns constituting the sheath portion of the elastic intertwined yarn 101 of the present invention are a combination of a high shrinkage nylon yarn 23 and a normal nylon multifilament yarn 24. show. In this case, one of the threads may be a nylon thread with an irregular cross section, or a combination of crimped threads may be used. In short, the elastic yarn 11 which is the core yarn
On the other hand, the sheath yarn only needs to be composed of a plurality of long fiber filament yarns, regardless of the material, denier, etc., and whether or not it is crimped.

Hereinafter, a method for manufacturing an elastic interlacing processing system according to the present invention will be explained based on the drawings.

FIG. 4 is a process schematic diagram showing one embodiment of the method for producing elastic intertwined textured yarn of the present invention.

In FIG. 4, the entire structure is a multi-spindle drawing machine, and the elastic yarn 1
1 consists of a winding tube 11' and its positive yarn feeding rollers 3 and 3', and by rotating these positive yarn feeding rollers 3 and 3', the elastic yarn 11 is fed at a constant speed.
is unwound from the winding tube 11'.

The let-out elastic yarn 11 is fed to active yarn feeding rollers 3 and 3.
By the stretching roller 5 rotating at a peripheral speed faster than ', it is stretched into a draft with a constant magnification (draft magnification), and sent to the entangling processing zone.

On the other hand, the long fiber filament yarn I is pulled out from the pirn 2 at a constant speed by rotating the supply roller 4, and is stretched at an arbitrary stretching feed rate (F,) between the stretching roller 5 and the supply roller 4. After that, the elastic yarn 11 is sent to the intertwining processing zone. This stretching is an operation for creating a feed rate difference between the long fiber filament yarns, and is not necessary if a feed rate difference is not created. The other long fiber filament yarn (2) is pulled out from the cheese 2' by the rotation of the drawing roller 5, and is sent to the entangling treatment zone together with the elastic yarn 11 and the long fiber filament yarn I.

Long fiber filament yarn I and long fiber filament yarn H
When a feed rate difference is added to the feed rate difference, it is appropriate that the absolute value is in the range of 0 to 5%. If the feed rate difference between the two long fiber filament yarns is greater than 5%, there is a risk that entangling properties will be reduced and a long spread portion will occur. When the long fiber filament yarn (■) is a crimped yarn, the long fiber filament yarn (I) as the original yarn is subjected to a drawing feed rate (F) corresponding to the constant draft (DI) before being supplied to the entangling treatment zone. , ) is preferably set to an underfeed of 5% or less.

The entanglement processing zone includes an entanglement nozzle 9 between the stretching roller 5 and the take-up roller 6.

The elastic yarn 11, the long fiber filament yarns I and (2) are supplied to this intertwining treatment zone in a manner that they are aligned, and the three yarns are combined.

The entangling nozzle 9 has different entangling and mixing effects depending on the type, but for the elastic entangled yarn of the present invention, any type that produces turbulent flow or vortex flow is used rather than straightening. be able to. However, a high degree of entanglement can be obtained by injecting the high-speed fluid flow perpendicularly or at an angle close to perpendicular to the traveling yarn to be entangled, rather than injecting it from a parallel or near-parallel direction. It has been found that there are fewer occurrences of loops (also called clatter) and loops.

The fluid pressure of the entangling process using this vertical jet fluid flow is 1 to 4.
Preferably, substantial turbulence is created at 5 kg/cal (gauge pressure). If it is larger than 4.5 kg/cIM, the number of entanglements may become excessive, and there is a risk of fuzzing or thread breakage in the interlacing processing room, and 1.0 kg/cIM.
If it is smaller than the length, on the other hand, the fibers will open too slowly, which may cause slips in woven fabrics and runs in knitted fabrics.

The constant magnification trough) (D,) of the elastic thread 11 is as follows:
Set within 300%. In the entangling treatment zone, the elastic yarn and the plurality of long fiber filament yarns are
It is necessary to set the roller speed so that the overfeed rate is equal to or less than A. Furthermore, the yarn feeding tension just before the interlacing nozzle is 1 to 2 g for the elastic yarn 11, and 1 to 2 g for the long fiber filament yarn.
(If it is a wire-processed yarn, it is about 115 ~
Better results can be obtained by setting the range to 1/10 and setting the long fiber filament yarn I, which is the original yarn, to a relatively high value of 3 to 10 g.

Elastic interlaced yarn 1 passed through interlacing nozzle 9 and drawn out
10 is sent out by a take-up roller 6 and wound onto a take-up tube 8 that comes into contact with a take-up roller rough.

As mentioned above, the two features of the method for producing elastic intertwined yarn of the present invention are that the draft magnification is set to 300% or less before supplying the elastic yarn 11 to the entanglement treatment zone, and The overfeed rate of the elastic yarn and the plurality of long fiber filament yarns is set to 5% or less.

FIG. 5 is a plan view of a jersey stitch showing one example of a circular knitted fabric knitted using the elastic intertwined yarn of the present invention. It is a plain knitted fabric.

Furthermore, in the same figure, vertical numbers C1, CI,
The knitting yarns CI, . Since the fiber parts b2 intersect, it is easy to expand and contract. Similarly, at the stitch crossing part (d), the intertwined part at''□ of the elastic intertwined yarn of course C and the intertwined part a of the elastic intertwined yarn of course C8 intersect, so it is difficult to stretch and contract. There is no misalignment, mutual movement is suppressed, and the occurrence of runs can be prevented.On the knitted surface, interlacing parts are not necessarily combined (d), or spread parts are combined with each other. In addition to the stitch intersections (a), (b), and (f), the converging section and the opening section constitute the stitch intersections (c) and (e), which are randomly combined. The properties are due to the asymmetry of the elastic intertwined processed yarn, which increases the stitch restraint force, which is the stretching behavior of ordinary elastic covered yarns, or false twisted covered elastic yarns made of elastic yarns and synthetic fiber filament yarns. Figure 6, which is completely different from
In order to improve the entangling performance of the elastic intertwined yarns 100 and 101 illustrated in FIG. 3, enlarged side views are shown of the elastic intertwined yarns 100 and 101, which are subjected to an interlacing treatment and then given real twist. In the elastic intertwined yarn 100' shown in FIG. 6(a), the intertwined portions and spread portions of the raw yarn 21 and the crimped yarn 22 are spaced more evenly apart than in the yarn shown in FIG. 3(a). ing. Similarly, in the elastic intertwined yarn 101' shown in FIG. 6(b), most of the yarn in FIG. , the high shrinkage nylon yarn 23 and the normal nylon multifilament yarn 24 change to a discrete bulge state at the most part, and are relatively uniform.

In other words, in order to improve the quality of the knitted fabric, the elastic intertwined yarn of the present invention is given a real twist in the next step after the interlacing treatment, thereby eliminating the streaky unevenness defects caused by short pinches on the fabric surface. , the appearance quality can be smoothed. In addition, when real twisting is applied after the interlacing process, the number of intertwined parts of the yarn obtained by the interlacing process is 8.
Even if it is less than 0 pieces/m, the number of intertwined parts increases, and the number of intertwined parts can be made equivalent to that of the elastic intertwined textured yarn of the present invention, and it is possible to achieve the same effect.

As mentioned above, to give real twist after the interlacing process, for example, the following procedure may be used. FIG. 7 is a schematic diagram of the yarn twisting process. As shown in Figure 7, this yarn twisting device is
The elastic intertwined yarn 110 is normally fed out from the winding tube 8 by the rotation of the feed roller 14, and is wound 2 to 3 times and stretched to a constant elongation state, and the twisting is done by the ballooning mechanism. The fibers are sent out, passed through a traveler 16 on a ring 17, subjected to real twist, and wound onto a burner 18. Elastic intertwined yarn 110
It is preferable that the number of actual twists applied to the fiber is 500 T/m or less and 80 T/m or more. If it is more than 500T/m, there is a risk that the intertwined parts will be twisted into flat grooves or a turning force (torque) will be generated, and if it is less than 80T/m, there is a risk that the effect of improving the characteristics will not be obtained. be. In addition, when the long fiber filament yarn constituting the sheath portion of the elastic intertwined yarn is a false twisted yarn, it is preferable that the heating direction of the temporary combustion and the heating direction of the actual twisting are the same. This is because by doing so, the spread portion can be further entangled and mixed.

In addition, in FIG. 1, FIG. 3, and FIG. 6, the long fiber filament yarns I, 21, and 24 are shown as if they were thick monofilament yarns, but this is for the convenience of illustration, and in reality, It is a multifilament yarn.

Specific examples and comparative examples of the present invention are shown below, but the present invention is not limited to the following examples. Table 1 shows the long fiber filament yarns used in the following Examples and Comparative Examples.

Example 1 - As the long fiber filament yarns ■ and ■, woolly nylon yarns (70 denier, 68 filaments, round cross-section yarn: registered trademark "Royal Sophie" manufactured by Toshi ■) that had been false twisted in advance were used as elastic yarns. Using the apparatus shown in Fig. 4, using polyurethane elastic thread (type 127C, 30 denier: registered trademark "Operon" manufactured by Toshi DuPont ■) as
The draft magnification (D,) was set to 250%, the feed rate difference (Fl) between the two woolly nylon yarns was set to 3%, and the feed rate (F,) of the three yarns in the entanglement processing zone was set to 4% overfeed. Entanglement nozzle (manufactured by Heparine: HEM
In A), the yarn was entangled at a fluid pressure of 4.0 kg/cffl (gauge pressure) to obtain an elastic entangled yarn.

The number of intertwined parts of the obtained elastic intertwined yarn was 168 pieces/m, and after cheese dyeing this yarn, it was knitted with a 24 gauge, sinker nine knitting machine. In this way, a suitable stretch knitted fabric was obtained for swimwear.

Examples 2 to 19 and Comparative Examples 1 to 10 Elastic entanglement was carried out in the same manner as in Example 1, except that the raw yarn and entanglement treatment conditions were changed as shown in Tables 1 and 2. The raw material yarn used to obtain the processed yarn included the same elastic yarn as in Example 1, as well as polyurethane elastic yarn (type 1).
54C, 40 denier) and polyurethane elastic thread (type 149B, 40 denier) (both registered trademarks "Operon" manufactured by Toshi DuPont ■) were used. Further, details of the long fiber filament yarns are shown in Table 1. In Table 1,
The false-twisted yarn is a crimped yarn that has been subjected to a normal one-heater false-twisting process.

As the entangling nozzle, the one used in Example 1 and the AWA
2111 manufactured by Our Spindle Co., Ltd. was used.

Regarding the elastic intertwined yarns of Examples 1 to 19 and Comparative Examples 1 to 10, the number of intertwined parts, strength of jersey run generation, jersey elongation rate, and overall evaluation were investigated and shown in Table 2.

The number of entangled parts is determined by applying a constant tension (heavy load of 0.1 g) to the yarn to be measured.
/denier), the number of entangled parts was read visually or with a counter using a universal projector (magnification: 80x), and expressed as the number per unit yarn length of 1 m.

To determine the strength of jersey run generation, a circular knitted fabric was knitted in the manner described in Example 1, a sample knitted fabric of size locm ) grip width 5cm,
It was expressed as the strength at the start of run generation when the gripping distance was 3 cm and the tension was stretched at a tensile rate of 50 cIII/min. The higher the numerical value of the strength of generating tenjiku runs, the better.

The elongation rate of cotton jersey is determined by the size of the test piece taken from the circular knitted fabric (
Width × length) 20cn + Expressed as directional elongation rate [%]. The larger the numerical value of the jersey elongation rate, the more preferable.

The overall evaluation was expressed as ■: Excellent, ○: Good, ×: Slightly poor, and XX: Poor.

As shown in Table 2, the yarns of the examples have a strong jersey run generation strength and a jersey elongation rate that is within a practical range. Comparative example 1
Yarns No. 8 to 8 were given a high draft of more than 300%, and all of them lacked interlacing performance and easily caused runs in jersey knitted fabrics. In addition, Comparative Example 9 is Example 2
This is a comparative example in which only one long fiber filament yarn is used as the sheath yarn, but compared to Example 2, there is a problem that the tenjiku run generation strength is lower. Comparative Example 10 is a comparative example in which only one long fiber filament yarn, which has twice the denier and twice the number of filaments, is used as the sheath yarn in Example 2. There is a problem that there is a drastic decrease in the number of trees and that it is easy for cotton-jersey orchids to occur.

Examples 20 to 32 and Comparative Examples 11 to 18 Elastic entanglement processing was carried out in the same manner as in Example 1, except that the raw yarn and entanglement treatment conditions were changed as shown in Tables 1 and 3. The number of intertwined parts, fabric mesh size, fabric elongation rate, and overall evaluation of the interlaced yarns obtained are shown in Table 3.

Fabric offset is determined by making plain weave, fill, and satin fabrics using each elastic intertwined processed yarn and weft stretch fabrics by inserting weft threads, and measuring the vertical deviation at a load of 0.454 kg f using method A of JIS L1062. It is expressed as the amount of slippage of the thread.

The elongation rate of the fabric was expressed as the elongation rate in the horizontal direction at a constant load of 1 kgf according to method B of JIS L1096.

The overall evaluation was expressed as ■: Excellent, ○: Good, ×: Slightly poor, and XX: Poor.

As is clear from Table 3 of the bullets of Examples 20 to 32 and Comparative Examples 11 to 18, the elastic intertwined yarns used in the fabrics were
A low draft magnification of 00% or less and a high fluid pressure setting will reduce the occurrence of slip in the fabric, and fine adjustment of the vertical and horizontal density in the fabric design will further reduce the occurrence of slip. With conventional coated elastic yarns, fabrics with a weft elongation rate of 35% or more had to be abandoned due to frequent slips, but with this invention, entanglement and
It was found that slippage was reduced due to the fiber blending effect. In particular, the level in which high shrinkage nylon yarn is used as the other long fiber filament yarn is extremely effective. In addition, the mixture of nylon thread and polyester thread has a good color mixture (each single thread is not clearly separated, but mixed with each other, resulting in a good color mixture).
The colors appear to be well harmonized), the menitone effect of the thin filament fabric was good, and the fashionable feel of the sports material was well received.

On the other hand, as in Comparative Examples 11 to 14, under relatively high draft magnification, even though the elastic intertwined yarns are good,
Even after making various adjustments to the woven fabric design, it was not possible to obtain a designed product with insufficient entanglement and a high woven fabric horizontal elongation rate, and there was a problem of frequent slipping. Furthermore, Comparative Example 15 is a comparative example in which only one long fiber filament yarn was used as the sheath yarn in Example 20.
Compared to Example 20, there is a problem of insufficient entanglement and slippage due to a large amount of fabric edge deviation. Comparative Example 16 is Example 2
This is a comparative example in which only one long fiber filament yarn with twice the denier and twice the number of filaments was used as the sheath yarn in Example 20, but compared to Example 20, the problem was that lack of entanglement was noticeable and slippage occurred due to the thicker denier. There is. Comparative Example 17 uses the same material, denier, and
This is a comparative example in which only one sheath yarn of the filament crimped yarn is used.Compared to Example 20, the stretch is good, but there is a problem in that the fabric has a large heel. Comparative Example 18 is a comparative example in which only one sheath yarn is made of crimped yarn of the same material with twice the denier filament as in Example 20, but compared to Example 20, the lack of entanglement is noticeable. , there is a problem that the fabric has a large deviation.

Among Examples 1 to 32, the elastic intertwined yarns shown in Table 4 were twisted using the device shown in FIG. 7 (270T/M: Z
direction).

The number of entangled parts of the obtained yarn was as shown in Table 4. The obtained yarn was cheese dyed and then knitted using a 24 gauge, nine sinker knitting machine to obtain a knitted fabric. The appearance, feel, and stretchability of this knitted fabric were investigated and shown in Table 4.

In addition, the appearance was evaluated by the following.

◎: Judgment of visual acuity, the quality is significantly improved compared to Example 1.

○: An improvement in quality compared to Example 1 is recognized by visual judgment.

The texture was evaluated as follows.

Soft: In hand-held window (handling) judgment, it felt softer than in Example 1.

Slightly soft: Judging by hand-held window (handling), Example 1
It is slightly less soft than .

In addition, stretchability was evaluated by the following.

◎:: The elongation rate is 10% or more higher than that of the same example before twisting.

○: Compared with the same example before twisting, the elongation rate was increased within a range of less than 10%.

Table 4 As shown in Table 4, it can be seen that the properties of the elastic intertwined yarn are further improved by subjecting it to actual twisting after the interlacing treatment.

〔Effect of the invention〕

As described above, according to the present invention, the above-described configuration provides the following excellent effects.

Interlaced using elastic thread and multiple long filament threads,
Blending means intertwining and intertwining multiple long fiber filament yarns with each other, and is a process in which a simple elastic yarn and one long fiber filament yarn are mixed and intertwined with each other using an air nozzle, and the two are relatively separated. The fibers are much more intertwined and mixed than those that are easy to use or those that have exposed elastic core threads. In other words, the elastic yarn and long fiber filament yarn are intertwined and mixed in the intertwined part, so that the elastic yarn forms the core part as in the past, but the plural long fibers make up the sheath part. By being intertwined and mixed with filament yarns, the elastic yarn clearly constitutes a core part by the intertwined part, and by making a plurality of long fiber filament yarns constituting the sheath part, the fiber opening effect is further worked, Even though it is a spread part, the intertwined parts work together to strengthen the spread part.

For the reasons mentioned above, such elastic intertwined yarn forms a core without exposing the elastic yarn even if it is squeezed in the subsequent preparation process or secondary process, and the strong part of the intertwined part is relatively soft. Because it meanderes and has the heating effect of long fiber filament yarn, there is no chance of getting caught, slipping, or breaking the spandex, which is likely to occur when there is no binding force of the elastic yarn of the core yarn, and the result is high. The interlacing and blending of fibers results in a fabric with excellent stretchability, and works to prevent slips (including stitching) in fabrics using filament yarns and runs in jersey knitted fabrics.

In addition, by including crimped yarn in the long fiber filament yarn, strong entanglement and blending of fibers can be achieved. The air nozzle operates in a completely different manner than the air nozzle used in this example.

(al) By using a plurality of long fiber filament yarns as sheath yarns, not only the intertwined portions but also the spread portions where the binding force of the elastic yarns is weak are made stronger.

(b) At the same time, in a state in which the elastic yarn is stretched to a draft magnification of 300% or less, relaxing by 5% or less in the entangling treatment zone together with multiple long fiber filament yarns supplied at the same time independently from this The long fiber filament yarn is approximated to a low yarn feeding tension just before the interlacing nozzle to further intertwine and mix the fibers.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows one embodiment of the elastic intertwined yarn of the present invention.
Figure 2 is an enlarged side view of the same elastic track textured yarn under no tension; b) shows the opening part. Fig. 3 is a side view showing two other embodiments of the elastic intertwined textured yarn of the present invention with different combinations of a plurality of long fiber filament yarns. FIG. 5 is a process schematic diagram showing an embodiment of the method for producing the elastic intertwined yarn of the present invention. FIG.
FIG. 6 is a plan view of a jersey stitch showing an example. FIG. 6 is a side view of the elastic intertwined yarn shown in FIG. FIG. 10.100, 101.110...Elastic intertwined yarn
11... Elastic thread 1. Il, 21.22, 23°24
...Long Fiber Filament Yarn Agent Patent Attorney Takehiko Matsumoto Figure 4

Claims (1)

[Scope of Claims] 1 An elastic yarn is used as a core yarn and a plurality of long fiber filament yarns are used as a sheath yarn, and an intertwined portion where the plurality of long fiber filament yarns are intertwined with the elastic yarn and the elastic yarn. around which at least one of the plurality of long fiber filament yarns is bulged in bulk alternately in the length direction, and the number of the intertwined parts is 80 to 180 pieces/m A range of elastic intertwined yarns. 2. Claim 1 in which the long fiber filament yarn includes a crimped yarn.
The elastic intertwined yarn described. 3. The elastic yarn that has been stretched at a draft magnification of 300% or less and a plurality of long fiber filament yarns are aligned and supplied to the fluid entanglement treatment zone at an overfeed rate of 5% or less, and the elastic yarn and An elastic intertwined processed yarn in which the elastic yarn is a core yarn and the plurality of long fiber filament yarns are a sheath yarn is obtained by intertwining and mixing with a plurality of long fiber filament yarns. Production method.