WO2021096008A1

WO2021096008A1 - Composite elastic yarn, stretchable fabric, and method for manufacturing composite elastic yarn

Info

Publication number: WO2021096008A1
Application number: PCT/KR2020/006160
Authority: WO
Inventors: 김기림; 정현기; 강연수; 김문선
Original assignee: 효성티앤씨 주식회사
Priority date: 2019-11-14
Filing date: 2020-05-11
Publication date: 2021-05-20
Also published as: EP4060103A1; KR102171832B1; CN114599829B; EP4060103A4; US20240011200A1; CN114599829A; BR112022007993A2

Abstract

The present invention relates to: a composite elastic yarn which comprises a core portion composed of elastic core filaments and a sheath portion composed of short fibers and covering the core portion, wherein the elastic core filaments have a low adhesion characteristics in which inter-filament adhesion is in the range of 9 to 198 mg, as measured according to the ASTM D3822 method; fabric; and a method for manufacturing a composite elastic yarn. According to the present invention, the problem of puckering occurring on the surface of a denim fabric can be resolved, thereby providing improved feel and improving the quality of an end product.

Description

Composite elastic yarn, stretch fabric, and manufacturing method of composite elastic yarn

The present invention relates to a method of manufacturing a composite elastic yarn, an elastic fabric, and a composite elastic yarn, and more particularly, a puckering in the form of a fabric using a low adhesion elastic yarn having a low adhesion between filaments as a core yarn of the composite elastic yarn. It relates to a composite elastic yarn, an elastic fabric, and a method of manufacturing a composite elastic yarn that solved the problem.

In the case of stretch fabrics used for denim, spandex is woven into composite elastic yarns used as core yarns. The composite elastic yarn is composed of a core section and a sheath section covering the core section. In general, the core yarn of the composite elastic yarn in the denim fabric is used as a single-core or dual-core elastic yarn to give elasticity to the denim fabric. For single core, one elastic yarn is applied as core yarn, and for dual core, elastic yarn and two polyester bicomponent fibers are applied as core yarn.

For example, U.S. Patent No. 8,093,160 discloses an elastic core yarn comprising a core portion composed of at least one elastic core filament and at least one inelastic core filament, and a sheath portion of short fibers arranged in a manner surrounding the core portion in a longitudinal direction. Disclosed is an elastic denim containing a core yarn. However, the stretchable denim obtained by this technique does not provide an appropriate level of stretchability, and there is a limit to the thickness of the yarn that can be used in the sheath portion including short fibers.

Composite elastic yarn and its manufacturing method are well known. For example, composite elastic yarns in which the elastic fiber core is covered with inelastic fibers are described in U.S. Patent Nos. 4,470,250 4,998,403, 7,134,265, 6,848,151.

In the case of fabricating a denim fabric with a conventional composite elastic yarn, there is a problem in that the thin cotton yarn does not completely cover the core portion, and the surface area that can be fused between the cotton yarn and the core yarn, which is a sheath portion, is small, so that the core yarn and the cotton yarn cannot be sufficiently fused to each other. This causes a slippage phenomenon in which the core yarn of the composite elastic yarn is separated from the sheath part and then falls out after being made of denim fabric and garment. When the core yarn having elasticity in the fabric is lost due to the slippage phenomenon, the fabric has a puckering problem in which the surface of the fabric is unevenly constricted. The perkering phenomenon on the surface of denim fabric is a factor that can cause product defects by impairing the appearance of the garment, so it is required to solve the perkering problem when weaving denim fabrics.

So far, no attempt has been made to produce yarns and fabrics to solve the problem of perkering of stretchable fabrics using composite elastic yarns.

The present invention is to solve the problems of the prior art described above, one object of the present invention is by applying an elastic yarn having a low adhesion between filaments to the core portion of the composite elastic yarn, puckering occurring on the surface of the denim fabric. ) To solve the problem.

Another object of the present invention is to provide a composite elastic yarn having high elasticity and remarkably improved elastic recovery property of a fabric in which the core yarn is used by forming a core portion of two or more elastic yarns supplied from a single bobbin.

Another object of the present invention is to improve the quality of the product and improve the feel of use by solving the problem of perkering occurring in the final product of the stretchable fabric.

One aspect of the present invention for solving the above-described problem,

A composite elastic yarn comprising a core part composed of an elastic core filament and a sheath part composed of short fibers surrounding the core part, wherein the elastic core filament has an adhesive force between the filaments in the range of 9 to 198 mg as measured by ASTM D3822 method. It relates to a composite elastic yarn, characterized in that it has a low adhesion property.

The elastic core filament has an inter-filament adhesion of 1.5% to 22% compared to a general-purpose elastic core filament having the same fineness.

The core portion may be composed of polyurethane, polyurethane-urea, or a blend of polyurethane and polyurethane-urea, and the sheath portion is wool, linen, silk, polyester, nylon, olefin, cotton, tencel, modal, poly It may be composed of hard yarn selected from the group consisting of viscose (poly-viscose) and combinations thereof. In the present invention, the fineness of the core yarn may be 40 to 120 denier.

Another aspect of the present invention includes a composite elastic yarn in which at least one of the warp and weft yarns includes a core portion composed of an elastic core filament and a sheath portion composed of short fibers surrounding the core portion, wherein the elastic core filament is ASTM It relates to a fabric characterized in that it has a low adhesion property in the range of 9 to 198 mg of adhesion between the filaments as measured by the D3822 method. The fabric of the present invention can be used for denim or non-denim.

In another aspect of the present invention, after spinning the elastic core filament yarn, the first interlacing is performed so that the bonding force between the filaments is 500 to 1500 mg, followed by secondary interlacing so that the bonding force between the filaments is 9 to 198 mg. Taking and producing a low adhesion core yarn; And it relates to a method for producing a composite elastic yarn comprising the step of spinning by coating the low-adhesion core yarn obtained in the previous step with a short fiber roving yarn.

In the first interlacing step, the air flow rate is set to 3 to 4 L/min, and the temperature is set to 35 to 30°C for the first interlacing, and in the second interlacing step, the air flow rate is set to 1 to 2 L/min. , Interlacing can be performed by setting the temperature to 15~20℃.

The present invention applies the core yarn of the composite elastic yarn as a single elastic yarn, but by using the elastic yarn with low adhesion between the filaments as the core yarn, which occurs on the surface of the denim fabric when a general single-core yarn or dual-core yarn is applied as a core yarn. There is an excellent effect of the present invention in that the perkering problem is solved.

In addition, according to the manufacturing method of the present invention, by the spinning process in which the primary and secondary air entanglement processes are added, the bonding force between the filament strands in the yarn without deterioration and filamentation of the yarn properties of the composite elastic yarn occurs. This low adhesion spandex yarn can be produced.

The fabric of the present invention improves the quality of the surface by improving the perkering problem occurring on the fabric surface, thereby providing a user with a comfortable feeling of use. In addition, the final product obtained by using the low bonding core yarn of the present invention has high elastic properties, remarkably improved elastic recovery properties, and shape retention properties.

1 is a schematic diagram of an apparatus for manufacturing a core yarn of a composite elastic yarn according to an embodiment of the present invention.

2 is a schematic diagram of an apparatus for manufacturing a composite elastic yarn according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As used herein and in the appended claims, the following terms are defined below:

As used herein, "filament" means long fiber strands, and "staple fiber" means a limited or short length fiber strand.

As used herein, "elastic core filament" refers to a filament having an elongation at break of more than 100%, and a preferred example is a spandex fiber.

The term "composite elastic yarn" as used herein refers to a core-spun yarn made by covering fibers around an elastic core filament.

In the present invention, the "bonding force between filaments" means that one filament in the yarn is separated by a length of 1 cm or more, and then the ends of the separated filaments are hung on a bonding force measuring device (Lenzing Instruments GmbH & Co. KG, Vibrodyn 400). Means the value (mg) measured according to ASTM D3822-07 method (Standard test methods for tensile properties of single textile fibers") by stretching at a constant elongation rate. do.

The composite elastic yarn of one aspect of the present invention is a composite elastic yarn comprising a core part composed of an elastic core filament and a sheath part composed of short fibers surrounding the core part, wherein the elastic core filament is measured by the ASTM D3822 method. It has a low adhesion property in which the adhesion force is in the range of 9 to 198 mg.

The elastic core filament may be a low adhesion elastic core filament having a low adhesion of 1.5% to 22% compared to a general-purpose elastic core filament having the same fineness. For example, the adhesive force between the filaments of the spandex 80D yarn, which is commonly used, is at the level of 700 to 900 mg, whereas the low adhesion elastic core filament according to the present invention is the sum of about 9 mg to 198 mg of the filaments in the case of 80D. Have a good fit.

In the present invention, when the bonding force between the filaments of the core yarn is less than 1.5% of the bonding force of the general-purpose spandex of the same fineness, a filamentation phenomenon in which the filaments in the yarn are separated due to excessively low bonding force may occur. On the other hand, if the bonding force between the filaments of the core yarn exceeds 22% of the bonding strength of the general-purpose spandex of the same fineness, it is not possible to provide a sufficient surface area to be fused by contact with the cotton yarn, which is the sheath part, during the covering process, so it is manufactured in the form of a fabric. There is a risk of perkering.

The core portion may be composed of an elastic core filament composed of polyurethane, polyurethane-urea, or a blend of polyurethane and polyurethane-urea.

The sheath portion may be a natural fiber such as cotton, wool, linen, silk, tencel, or modal. Alternatively, the sheath portion may be a single component staple synthetic fiber. For example, the sheath portion may be a fiber selected from the group consisting of polyester, nylon, olefin, poly-viscose, acrylic, modacrylic, rayon, and any combination thereof. In the present invention, the sheath portion preferably includes cotton yarn.

In the composite elastic yarn of the present invention, the core yarn has a fineness of 40 denier to 120 denier. When the fineness of the core yarn is less than 40 denier, a thin denim fabric is formed compared to the general fabric used for denim, and the effect of correcting the body when worn is insignificant and the appearance of the clothing is poor. On the other hand, when the fineness of the core yarn exceeds 120 denier, a thick denim fabric is formed compared to a general fabric for denim use, and the feeling of wearing clothes is deteriorated due to a stiff and heavy feeling.

Another aspect of the present invention relates to a method of manufacturing an elastic composite yarn. In the present invention, after spinning the elastic core filament yarn, the first interlacing is performed so that the bonding force between the filaments is 500 to 1500 mg, and then the second interlacing is performed so that the bonding force between the filaments is 9 to 198 mg, and then the low bonding core is wound. A composite elastic yarn can be produced by preparing a yarn, and then coating the obtained low-adhesion core yarn with a short fiber roving yarn and spinning it.

The composite elastic yarn of the present invention is produced by spinning core yarn and sheath by ring spinning or open-end spinning in a spinning machine.

Spandex yarn is generally produced by dry spinning at high temperatures in a spinning barrel. At this time, the spandex yarn is heated after spinning, resulting in a lower modulus and an appropriate temperature for imparting twist to the yarn. In the drawing process, the spandex yarn passes through an air interlaced nozzle to impart adhesion between the filaments to perform winding. If you want to produce yarns with low adhesion to solve the perkering problem in denim fabrics, you can produce yarns with low adhesion by lowering the pressure applied from the air interlacing nozzle during the yarn spinning process. However, when the bonding force of the yarn is lowered by the above spinning process, a problem of strength reduction occurs among the physical properties of the produced yarn, and a filamentation phenomenon occurs in which the filament strands in the yarn are separated, resulting in a yarn defect problem. .

In the present invention, the air interlaced nozzle (hereinafter referred to as “interlace nozzle”) that imparts adhesion in the spinning process of the core yarn is used as the first and second capable of imparting adhesion in two steps in the spinning process using one existing interlaced nozzle. By applying the second interlaced nozzle to the spinning process, it is possible to solve the problem of perkering in the final fabric.

The first interlaced nozzle 14 controls the pressure and temperature in the same way as the spinning process of the existing spandex, and passes the yarn through the air. The flow rate of air in the general interlaced nozzle is 3 to 4 L/min, and the temperature is 35 to 30° C., and the air flow rate and temperature of the first interlaced nozzle 14 according to the present invention were the same as the above-mentioned existing conditions. When air is supplied from the first interlace nozzle 14, the yarn is adjusted so that it can be bonded to two large filament strands.

In the present invention, the second interlaced nozzle 15 finally produces a low adhesion elastic core filament having a low adhesion by passing the yarn strands passing through the first interlaced nozzle while applying low temperature and low pressure air. More specifically, the yarn that has passed through the first interlaced nozzle 14 exists in a form of largely bonded to two filament strands, and the yarn is fed from the second interlaced nozzle 15 at a flow rate of 1 to 2 L/min and It is produced to give very low adhesion between two filament strands by passing it through air at a temperature of 15~20℃. For example, in the case of an 80 denier/6 filament product, after passing through the first interlaced nozzle 14, it becomes two 40 denier/3 filaments, and passes through low-temperature and low-pressure air through the second interlace nozzle 15. While doing so, low adhesion is imparted between the two strands. By the spinning process including the first and second air interlaced nozzles described above, a low adhesion spandex yarn having low adhesion between filament strands in the yarn without deterioration of properties and filamentation of the spandex yarn will be produced. I can.

The low bonding elastic core filament 21 is obtained by the core yarn manufacturing apparatus 10, and the composite elastic yarn 40 is obtained by the complex elastic yarn spinning apparatus 30.

1 schematically shows an apparatus for manufacturing a core yarn of a composite elastic yarn according to an embodiment of the present invention. Referring to FIG. 1, the core yarn manufacturing apparatus 10 used to obtain the low bonding elastic core filament 21 is basically a dry spinning unit 11, a guide cylinder 12 continuously provided to the dry spinning unit 11 ), an oil pickup roller 13, a take-up device 16, and a bobbin 17 associated with the take-up device 16.

In order to manufacture the low-adhesion elastic core filament 21, the polyurethaneurea polymer is first spun in the form of an elastic yarn 20 in the dry spinning unit 11. Subsequently, the obtained elastic yarn 20 passes through the oil pickup roller 13, passes through the first interlace nozzle 14 and the second interlace nozzle 15 by the guide cylinder 12, and is transferred to the take-up device 16. The oil pickup roller 13 transfers the elastic yarn 20 without oscillation and vibration in order to properly wind the elastic yarn 20. The elastic yarn 20 transmitted to the take-up device 16 is wound on the bobbin 17.

Subsequently, the bobbin 17 on which the low bonding elastic core filament 21 is wound is supplied to the composite elastic yarn spinning device 30, as schematically shown in FIG. 2. The composite elastic yarn spinning device 30 is basically a low-cohesion elastic core filament obtained from a roving yarn 31, a yarn drawing cylinder 32 through which the roving yarn 31 passes, a thin roving yarn 31, and a bobbin 17. It includes a guide front cylinder 33 supplied with 21, a yarn guide 34 provided continuously with the guide front cylinder 33, and a spinning unit 35. The spinning unit 35 includes a ring 351, a moving unit 352 and a cop 353. Passing the roving yarn 31 between the yarn drawing cylinders 32, supplying the low bonding elastic core filament 21 from the bobbin 17 to the guiding front cylinder 33, and combining with the drawn roving yarn 31 , The thin roving yarn 31 and the low adhesion elastic core filament 21 are supplied from the yarn guide 34 to provide a smooth flow, and the spinning unit 35 is oriented, and the spinning unit 35 to the ring 351 By operating the yarn moving unit 352 together, the thin roving yarn 31 is wound on the low bonding elastic core filament 21, and the composite elastic yarn 40 can be manufactured by spinning and winding on the cob 353. .

Through this process, a composite elastic yarn having a core-sheath structure can be obtained. The composite elastic yarn obtained by this process has a structure in which the roving yarn 31 is covered on the low adhesion elastic core filament 21. In the present invention, the elastic yarn 20 used in the core portion is made of two-end or more elastic yarns supplied from a single bobbin. In this way, when a plurality of ends containing elastic yarns such as spandex provided from a single bobbin are used in the core portion, elasticity and elastic recovery rate can be improved in a final product such as a fabric in which the core yarn is used.

In order to provide high elasticity, when the elastic yarn 20 included in the core yarn structure is supplied from an individual bobbin, a difference in tension between the spandex is caused, thereby forming an uneven core yarn structure. In the core yarn disclosed according to the present invention, high elasticity is achieved by a component of a plurality of elastic yarns 20 provided from a single bobbin 17 of the core portion to a plurality of ends. Therefore, it is possible to obtain a core yarn with high uniformity.

Another aspect of the present invention relates to an elastic fabric. The fabric of the present invention includes a composite elastic yarn in which at least one of the warp and weft yarns includes a core portion composed of an elastic core filament and a sheath portion composed of short fibers surrounding the core portion, wherein the elastic core filament is the ASTM D3822 method It is characterized in that it has a low adhesion property in the range of 9 to 198 mg of adhesion between filaments when measured as. The fabric of the present invention can be used as a fabric for denim or non-denim.

The composite elastic yarn of the present invention may be used in the manufacture of fabrics, knitted fabrics, non-woven fabrics, and the like, and may be preferably used in stretch fabrics for denim. Here, the fabric can be made in a variety of weaving patterns including plain weave, poplin, twill, oxford, dobby, satin, satin, and combinations thereof.

The stretchable fabric of the present invention may have an elongation of 20-50% and an elongation recovery of 90-97%. The fabric may exhibit only weft-elasticity, or may exhibit elasticity in both directions, where useful stretch and resilience properties appear in both warp and weft yarns.

Hereinafter, the present invention will be described in detail by way of examples. These examples are for illustrative purposes only, and the following examples should not be construed as limiting the scope of the present invention.

실시예Example

실시예Example 1 One

The spandex yarn used as the core yarn of the composite elastic yarn was prepared by the following method. Due to the high temperature in the spinning barrel, the spandex yarn is heated after spinning, and is brought out at an appropriate temperature to impart twist to the yarn. At this time, air is imparted while passing through the first interlace nozzle, and the bonding force between the filaments of the spandex yarn is 870 mg, which falls within the range of the 80D universal spandex bonding force value. Thereafter, the bonding force between the filaments of the spandex yarn was measured to be 40 mg, which is a 5% value of 800 mg, which is the bonding force value of the general-purpose spandex of 80D, by applying low-temperature and low-pressure air while passing through the second air interlace nozzle during the winding process.

16 cotton yarn was used as the hard yarn, and the low adhesion elastic core filament prepared above was used as the core yarn. Among the composite elastic yarns, the DR (degree of elongation) of the spandex for manufacturing the composite elastic yarn used for the weft was 3.5 times.

The fabric was woven using 11 pure cotton yarn for warp. When weaving the fabric using the composite elastic yarn, the composite elastic yarn was introduced as weft yarn, and the yarn used for the warp was beamed without additional elongation. After the twill fabric was manufactured using the composite elastic yarn, the average width of the fabric before washing with water was 144 to 149 cm, and the width of the fabric after washing with water was found to be 120 to 125 cm. The fabric was prepared as a sample through a dyeing process in a conventional method after fabrication by the above process.

The properties of the core yarn of the composite elastic yarn and the occurrence of perkering in the fabric form were evaluated and shown in Table 1 below.

실시예Example 2 2

An elastic yarn with low adhesion between filaments was applied as the core yarn of the composite elastic yarn for the fabrication of denim fabric. At this time, the bonding force between the filaments of the spandex yarn after passing through the first interlaced nozzle is 880 mg, which falls within the range of the 80D universal spandex bonding force value, and the bonding force between the filaments of the spandex yarn after passing through the second air interlacing nozzle is It was measured as 14 mg, which is a 2% value of 700 mg, which is the adhesion value of the universal spandex of 80D.

The composite elastic yarn and fabric were prepared in the same manner as in Example 1, except that the core yarn was different as described above, and then the physical properties were evaluated and the results are shown together in Table 1.

실시예Example 3 3

An elastic yarn with low adhesion between filaments was applied as the core yarn of the composite elastic yarn for the fabrication of denim fabric. At this time, the bonding force between the filaments of the spandex yarn after passing through the first interlace nozzle is 870 mg, which is within the range of the 80D universal spandex bonding force value, and after passing through the second air interlace nozzle, the bonding force between the filaments of the spandex yarn is It was measured as 198 mg, which is a 22% value of 900 mg, which is the adhesion value of the universal spandex of 80D.

비교예Comparative example 1 One

Composite elastic yarn and composite elastic yarn in the same manner as in Example 1, except that the general-purpose spandex 80D manufactured by passing only the first interlaced nozzle without passing through the first and second air interlacing nozzles was used as the core yarn of the composite elastic yarn for the fabrication of denim fabric. After preparing the fabric, the physical properties were evaluated and the results are shown together in Table 1.

비교예Comparative example 2 2

Composite elastic yarns and fabrics were prepared in the same manner as in Example 1, except that 50D inelastic fibers and 70D spandex dual-core yarns (120D) were applied as core yarns of the composite elastic yarn, and then the physical properties were evaluated and the results were evaluated. It is shown together in Table 1.

비교예Comparative example 3 3

The bonding force between the filaments of the spandex yarn after passing through the first interlaced nozzle is 870 mg, which is within the range of the 80D universal spandex bonding force value, and the bonding force between the filaments of the spandex yarn after passing through the second air interlacing nozzle is 80D. Composite elastic yarns and fabrics were prepared in the same manner as in Example 1, except that the adhesive strength of spandex was set to 7 mg, which is a 1% value of 700 mg, and then the physical properties were evaluated and the results are shown in Table 1.

비교예Comparative example 4 4

After passing through the first interlaced nozzle, the bonding force between the filaments of the spandex yarn is 890 mg, which is within the range of the 80D universal spandex bonding force value, and after passing through the second air interlaced nozzle, the bonding force between the filaments of the spandex yarn is 80D. A composite elastic yarn and a fabric were prepared in the same manner as in Example 1, except that 230 mg, which is a 25.5% value of 900 mg, which is an adhesion value of spandex, and then the physical properties are evaluated, and the results are shown together in Table 1.

시험예Test example

The physical properties of the composite elastic yarn and fabric obtained in Examples and Comparative Examples were evaluated in the following manner. Each of the 20 samples was measured in consideration of the measurement range error, and the average value of the median values excluding the highest and lowest values was calculated. At this time, each test piece was evaluated after conditioning at 23° C. and 65% relative humidity for 14 hours.

[Method of evaluating the adhesion of fibers]

The bonding force between the filaments in the composite elastic yarn obtained in the examples was measured using a bonding force measuring device (manufactured by Lenzing Instruments GmbH & Co. KG, Vibrodyn 400) according to ASTM D3822-07. The measuring method is a measuring device that measures the tensile strength of one fiber by separating one filament from the yarn with a fingertip and measuring the tensile strength of one fiber by measuring the separated filament and each end of the filaments remaining unseparated. Hang it on Vibrodyn-400, manufactured by Co., Ltd., and measure the force (mg) when the separated filament and the remaining filaments are separated by elongation by stretching at a constant rate of 1,000%/min.

[Fiber strength and elongation evaluation method]

The strength and elongation between the filaments in the yarn were measured using an automatic elongation measuring device (manufacturer: Textechno, model name: MEL) with a load cell of 32cN, a sample length of 10 cm, and a tensile speed of 100 cm/min. At this time, the strength and elongation values at break were measured.

[Presence or absence of percussion]

After weaving the fabric, it was evaluated whether perkering occurred with the naked eye.

[Amendment 18.06.2020 pursuant to Rule 91]

As can be seen from the results of Table 1, when the composite elastic yarn of the present invention was applied, perkering did not occur in the fabric, and the elastic recovery rate was also excellent. On the contrary, in Comparative Examples 1, 2 and 4, perkering occurred, and in Comparative Example 3, many yarn threading occurred, making fabric manufacturing and physical property evaluation impossible.

Although the preferred embodiments of the present invention have been described in detail above, these descriptions are for illustrative purposes only, and those skilled in the art will recognize that modifications and changes can be made without departing from the spirit of the present invention, and all such modifications And changes are intended to be included as belonging to the true scope of the present invention.

Claims

A composite elastic yarn comprising a core part composed of an elastic core filament and a sheath part composed of short fibers surrounding the core part, wherein the elastic core filament has a bonding force between the filaments in the range of 9 to 198 mg when measured according to ASTM D3822 method. Composite elastic yarn, characterized in that it has low adhesion resistance.
The composite elastic yarn of claim 1, wherein the elastic core filament has an inter-filament bonding force of 1.5% to 22% compared to a general-purpose elastic core filament having the same fineness.
The composite elastic yarn according to claim 1, wherein the core part is composed of polyurethane, polyurethane-urea, or a blend of polyurethane and polyurethane-urea.
The composite elastic yarn of claim 1, wherein the sheath portion is selected from the group consisting of wool, linen, silk, polyester, nylon, olefin, cotton, tencel, modal, poly-viscose, and combinations thereof.
The composite elastic yarn according to claim 1, wherein the core yarn has a fineness of 40 denier to 120 denier.
The composite elastic yarn according to claim 1, wherein the elastic core filaments are interlaced twice before being wound, and are produced by interlacing air at a lower pressure and lower temperature than in the first interlacing step in the second interlacing.
At least one of the warp and weft includes a composite elastic yarn including a core portion composed of an elastic core filament and a sheath portion composed of short fibers surrounding the core portion, wherein the elastic core filament is measured according to ASTM D3822 method. A fabric, characterized in that it has low adhesion properties in the range of 9 to 198 mg of adhesion between filaments.
After spinning the elastic core filament yarn, the first interlacing was performed so that the bonding force between the filaments was 500 to 1500 mg, followed by secondary interlacing so that the bonding force between the filaments was 9 to 198 mg, and then wound to produce a low bonding core yarn. The step of doing; And coating and spinning the low-adhesion core yarn obtained in the previous step with a short fiber roving yarn.
The method according to claim 8, wherein the air flow rate is 3 to 4 L/min, the temperature is 35 to 30°C, and the first interlacing is performed at the first interlacing nozzle, and then the air flow rate is 1 to 2 L/min. And performing secondary interlacing in a second interlaced nozzle at a temperature of 15 to 20°C.
[10] The method of claim 8, wherein the elastic core filament is manufactured to have an adhesion between the filaments of 1.5% to 22% compared to a general-purpose elastic core filament having the same fineness.