KR101979656B1 - Composite false-twist yarn and Manufacturing method thereof - Google Patents

Abstract

The present invention relates to a complex false twist yarn, which exhibits excellent elasticity and tactile sensation, and to a manufacturing method thereof. The manufacturing method of the present invention comprises the steps of: manufacturing a false twist yarn; and interlacing the false twist yarn and a polyethylene terephthalate partial oriented yarn (PET POY).

Description

Composite false-twist yarn and manufacturing method thereof < RTI ID = 0.0 >

More particularly, the present invention relates to a composite yarn exhibiting remarkably excellent stretchability and tactile feel in fabrics and knitted fabrics, and exhibiting an excellent drape property, and a method for producing the same.

Synthetic fibers have a shorter history than natural fibers, but they have reached a level comparable to that of natural fibers in some characteristics due to the development of repeated techniques. In recent years, the market for spandex, which is characterized by elasticity, has been steadily growing as demand for materials for stretchable fabrics and existing and differentiated fabrics has increased. However, spandex has a problem in alkali resistance and has a problem in shape stability and the like, so it can not be used as a spandex yarn alone, and a separate covering process is required. Therefore, there is a limit to the demand of the market which desires to have thinner fabric because it has to obtain a relatively thick fabric.

In order to overcome the disadvantages of such spandex, a stretchable latent crimped fiber prepared by a method of expressing a crimp by a heat shrinkage difference imparted upon fabrication of a fabric by combinedly spinning a polymer having different heat shrinkage characteristics in a side-by-side manner has been proposed .

On the other hand, in the case of the conventional latent crimped fiber, there is a problem that both the stretchability and the tactile feel remarkably excellent in the fabric and the knitted fabric are exhibited, and at the same time, the effect of excellent drape can not be achieved.

Accordingly, there is an urgent need to develop a composite yarn yarn capable of achieving remarkably excellent stretchability and tactile feel in fabrics and knit fabrics, and at the same time achieving an effect of excellent drape characteristics.

JP 1997-209217 A (Publication date 1997.08.12)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a composite yarn which can exhibit remarkably excellent stretchability and tactile feeling in fabrics and knitted fabrics, And a method of manufacturing the same.

In order to solve the above-described problems, the present invention provides a method of manufacturing a multilayer ceramic capacitor, comprising the steps of supplying a latent housing including a polyethylene terephthalate (PET) component and a polybutylene terephthalate (PBT) Passing through a combustor and a second feed roller to perform simultaneous twisting and stretching, and then passing the third feed roller to produce a false twist yarn; And interlacing the false-twist yarn and the polyethylene terephthalate partially stretched yarn (PET POY).

According to a preferred embodiment of the present invention, the false twisting ratio may be 1.5 to 2.5, and the stretching ratio may be 1.5 to 2.0.

The first over feed rate between the first feed roller and the second feed roller may be between 1 and 6%, and the second over feed ratio between the second feed roller and the third feed roller may be between 0.3 and 0.48%. have.

The first heater may include a first heater zone and a second heater zone having a longer length than the first heater zone. The temperature of the first heater zone may be 300 to 500 ° C, The temperature of the second heater zone may be 200 to 350 ° C, and the temperature of the first heater zone may be higher than that of the second heater zone.

In addition, the single-sided cross-section of the latent housing may have any cross-sectional shape selected from side-by-side, circular and hollow shapes, and the latent housing is made of polyethylene terephthalate (PET) Terephthalate (PBT) component in a weight ratio of 6: 4 to 8: 2.

Also, the interlacing can be performed with an air pressure of 1.8 to 2.5 bar.

In order to solve the above-mentioned problems, the present invention provides a multifaceted yarn produced by the manufacturing method according to the present invention and having a strength of 3 to 7 g / d 'and an elongation of 40% or more.

INDUSTRIAL APPLICABILITY The composite yarn of the present invention and its manufacturing method exhibit remarkably excellent stretchability and tactile feel in fabrics and knitted fabrics, and have an excellent drape property.

1 is a schematic view of a process for manufacturing a false twist yarn according to a preferred embodiment of the present invention,
2 is a schematic view of a process for producing a composite yarn according to a preferred embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

A method for manufacturing a composite yarn according to an embodiment of the present invention includes the steps of feeding a potential barrel containing a polyethylene terephthalate (PET) component and a polybutylene terephthalate (PBT) component to a first feed roller and passing the first heater Preparing a false warp yarn by passing the latent warp yarn subjected to the stretching through a third feed roller; And interlacing the false-twist yarn and the polyethylene terephthalate partially stretched yarn (PET POY).

First, a step of manufacturing a false warp yarn will be described.

The potting housing for manufacturing the false-twist yarn according to the present invention includes a polyethylene terephthalate (PET) component and a polybutylene terephthalate (PBT) component. In this case, a coil-shaped crimp is physically expressed by the difference in heat shrinkage characteristics of each polymer, and the desired high stretchability is achieved by a principle similar to a spring, and the stretching and flaking process according to the present invention is performed more smoothly (PET) component and a polybutylene terephthalate (PBT) component at a ratio of 6: 4, preferably 3: 4, in order to make the polyethylene terephthalate (PET) component larger than the polybutylene terephthalate To 8: 2 by weight, more preferably 6.5: 3.5 to 7.5: 2.5 by weight.

If the content of the polyethylene terephthalate (PET) component exceeds the above range, the stretchability and dyeability may be deteriorated. When the content of the polybutylene terephthalate (PBT) component exceeds the above range, flexibility and softness ) May be lowered.

In addition, the potting housing for producing the false-twist yarn according to the present invention may have any one cross-sectional shape selected from the side-by-side, circular and hollow shapes, and the polyethylene terephthalate ) Components may be contained in greater amounts than the polybutylene terephthalate (PBT) component, the side-by-side, circular and hollow sections of the latent housing may appear unevenly.

Meanwhile, the potential barn can be formed through composite radiation, and the condition of the composite radiation can be used without limitation as long as it can be used conventionally in the art. Preferably, the composite radiation angle is 45 to 90 degrees, A pressure of 150 to 200 kg / cm 2 and a spinning speed of 3,000 to 6,000 mpm (m / min). By satisfying the above-mentioned spinning conditions, it is possible to further improve tactile feeling, softness, body feel and drape in fabrics and knitted fabrics.

Referring to FIG. 1, a latent bulb that is loaded on the krill 10 is fed to the first feed roller 20 and passes therethrough. The yarn passed through the first feed roller 20 passes through the first heater 30 And then passes through the cooler 40.

At this time, the first heater 30 may include a first heater zone and a second heater zone. The second heater zone may be longer than the length of the first heater zone so as to perform a uniform heat treatment and improve shrinkage characteristics and dyeability. Preferably, the length ratio between the first heater zone and the second heater zone is 1: 1.2 to 10. As the length ratio between the first heater zone and the second heater zone satisfies the above range, it is possible to exhibit the excellent stretch characteristics and excellent effects of touch, softness and body feel.

The temperature of the first heater zone may be higher than that of the second heater zone. The temperature of the first heater zone may be 300 ° C to 500 ° C, preferably 350 ° C to 450 ° C. The zone may have a temperature of 200 ° C to 350 ° C, preferably a temperature of 225 ° C to 325 ° C. If the temperature of the first heater zone is less than 300 ° C or the temperature of the second heater zone is less than 200 ° C, uniform heat treatment may not be easy. If the temperature of the first heater zone exceeds 500 ° C, If the temperature of the heater zone exceeds 350 ° C, there may be a problem that fluff is generated in the pottery housing. If the temperature of the first heater zone is equal to or lower than the temperature of the second heater zone, the shrinkage characteristics and dyeability may be deteriorated.

The latent wind passing through the first heater 30 passes through the cooler 40. In this case, the temperature of the fiber is preferably lowered to about 70 to 90 ° C. The latent wind passing through the first heater 30 passes through the cooler 40 and the temperature is lowered. After passing through the disk type combustor 50, . At this time, the step ratio is 1.5 to 2.5, preferably 1.4 to 2.3, and more preferably 1.9 to 2.1. If the aspect ratio is out of the above range, there may arise a problem that high stretchability and softness, softness, and body feel are hardly exhibited at the same time.

The latent housing passing through the disk type combustor 50 passes through the second feed roller 60. The drawing is caused by a difference in linear velocity between the first feed roller 20 and the second feed roller 60. The yarn is fed to the first feed roller 20 and the second feed roller 60, (30) so that stretching and fusing can be performed at the same time.

The stretching ratio is defined as the speed of the second feed roller / the speed of the first feed roller, and the stretching ratio may be 1.5 to 2.0, preferably 1.6 to 1.9. If the stretching ratio is less than 1.5, the tensile strength is lowered, and thus the false twist yarn produced may be uneven. If the stretching ratio is more than 2.0, a problem may occur that the yarn is broken during the process due to excessive tension.

The latent housing passes through the second feed roller 60 and then the third feed roller 80, and the second heater 70 may or may not be installed therebetween. If the latent housing passes through the second heater 70 after passing through the second feed roller 60, the temperature of the second heater 70 may be 180 ° C or less. If the temperature of the second heater exceeds 180 DEG C, the shrinkage characteristics may be deteriorated.

Thereafter, the latent sheath passing through the third feed roller 80 can be imparted with oil while passing through the oiling roller 90, and then wound around the first take-up roller 100, .

On the other hand, the first over feed rate OF1 means (the speed of the first feed roller - the speed of the second feed roller) / the speed of the first feed roller, and the second over feed rate OF2 (The speed of the first take-up roller-the speed of the third feed roller) / the first take-up roller (the speed of the second take-up roller) Means the speed of the roller.

In the present invention, the first overfeed rate (OF 1) may be 1 to 6%, and preferably 1.5 to 5.5%. If the first overfeed rate is less than 1%, the interlacing becomes small and may become non-uniform. If the first overfeed rate is more than 6%, the tension may decrease and the thread trimming may increase.

In addition, the second over feed rate OF2 between the second feed roller and the third feed roller may be 0.3 to 0.48%. And more preferably 0.35 to 0.43%. When the second overfeed rate satisfies the above range, the yarn path can be stabilized and the winding tension and strength can be adjusted. Further, when the second heater 70 is provided, the fixed tension in the second heater may be determined and the shrinkage ratio may be adjusted according to the fixed tension. If the second overfeeding rate does not satisfy the above range, it is impossible to stabilize the apostrophe, so that the false twisting property is remarkably lowered, and yarn defects such as mow loops are caused. There is a problem that can not be manifested.

In the present invention, the third overfeed rate (OF 3) is preferably 0.1 to 0.35%, and more preferably 0.15 to 0.30%. If the third overfeed rate exceeds 0.35%, there is a problem that the desired effect of the present invention may not be exhibited, such as a decrease in tension.

On the other hand, the speed of each feed roller can be appropriately changed in a range that satisfies the range of the over feed rate.

Next, the step of interlacing the false-twist yarn and the polyethylene terephthalate partially stretched yarn (PET POY) will be described.

2, the composite false warp yarn according to the present invention is produced by interlacing the twist yarn 1 and the polyethylene terephthalate partially stretched yarn 2 through the interlace nozzle 110 and winding it on the second winding roller 120 .

The air pressure of the interlace nozzle 110 can be used as long as it is air pressure for performing interlacing. However, it is preferable to perform air pressure of 1.8 to 2.5 bar, more preferably 1.9 to 2.4 bar, Can be more advantageously improved in stretchability and softness (tactile feeling). If the air pressure of the interlace nozzle 110 is less than 1.8 bar, softness may be deteriorated. If the air pressure exceeds 2.5 bar, the elasticity may be deteriorated.

On the other hand, the composite false-twist yarn of the present invention produced by the above-described production method has a strength of 3 to 7 g / d 'and an elongation of 40% or more, preferably a strength of 4 to 6 g / Or more. As the strength and elongation of the composite yarn satisfies the above range, the yarn exhibits remarkably excellent stretchability and feel in the fabric and the knitted fabric, and exhibits an excellent drape property.

On the other hand, the composite false warp yarn according to the present invention comprises a polyethylene terephthalate (PET) component and a polybutylene terephthalate (PBT) component as constituent components of a latent sheath stock, The composite yarn is produced by interlacing the partially stretched yarn (PET POY), so that the stretchability and the softness are remarkably excellent at the same time.

Hereinafter, the present invention will be described with reference to the following examples. The following examples are provided to illustrate the invention, but the scope of the present invention is not limited by the following examples.

[ Example ]

Example  One: Multifaceted speaker  Produce

First, a false twist yarn was manufactured using a latent housing using a twist device as shown in FIG. The potting compartment used herein was composed of a polyethylene terephthalate (PET) component and a polybutylene terephthalate (PBT) component in a weight ratio of 7: 3, respectively. The monocomponent section was a side-by-side type, , A multifilament yarn having a number of 36 filaments, a strength of 2.5 g / d ', an elongation of 42%, and a crimp ratio of 20% was used. The first overfeed rate OF1 is 3.35%, the second overfeed rate OF2 0.39%, the third overfeed rate OF3, the sequential ratio 1.98, the draw ratio 1.747, the lengths of the first and second heater zones A ratio of 1: 2, a first heater zone temperature of 400 占 폚 and a second heater zone temperature of 275 占 폚 to produce a false-twist yarn. The strength of the prepared false - twist yarn was 3.2 g / de ', elongation was 26%, and int was 88 yarns / m.

Next, as shown in FIG. 2, the composite false-twist yarn was produced by interposing the produced false-twist yarn and polyethylene terephthalate partially stretched yarn (PET POY) through an interlace nozzle at an air pressure of 2.1 bar.

Example  2 to 17 and Comparative Example  1-3

The same procedure as in Example 1 was carried out except that the second overfeed ratio, the secondary speed ratio, the stretching ratio, the component of the potential housing, the air pressure of the interlace nozzle and the component of the partially drawn yarn, .

< Experimental Example  1>

The following properties of the composite yarn prepared by the above Examples and Comparative Examples were measured and shown in Tables 1 to 4 below.

1. Strength

The composite yarn produced through the above Examples and Comparative Examples was measured for strength based on KS K 0412.

2. Shindo

The elongation was measured according to KS K 0412 for the composite yarn produced by the above examples and comparative examples.

< Experimental Example  2>

Each of the composite yarns prepared in the above Examples and Comparative Examples was made into a circular knot with 100% of the kneaded yarns, and then subjected to salt processing according to normal processing conditions to prepare respective knit fabrics. The following physical properties of each knitted fabric were measured and shown in the following Tables 1 to 4.

1. Tactile ( Softness ) evaluation

The tactile sensation (softness) was evaluated by ten panelists for each knitted fabric manufactured from the composite yarn produced by the above Examples and Comparative Examples, and the average score of the touch evaluated by each panelist was 0 to 5 (Softness) was evaluated as? When? Exceeding 4 points,? When exceeding 4 points of less than 3 points, and? When less than 3 points were exceeded.

2. Drape Castle

The laminates of the knitted fabrics prepared by the composite yarns prepared in the Examples and Comparative Examples were measured according to KS K 0539. At this time, it was judged that the shorter the distance, the sooner the front end of the fabric was touched, the more flexible the fabric was, and the better the drapeability was.

3. Weft (time)

It was evaluated as the number of stoppages of the loom due to trimming occurred in the process of weaving 1.76m width and 91.44m width of fabric. - When the number of stopping is less than 1, - ○, when more than 1 time is 5 times - And when it exceeded - x, the fabricability was evaluated.

division Example
One Example
2 Example
3 Example
4 Example
5 Manufacture of false wares The second over feed rate (OF2,%) 0.39 0.25 0.35 0.43 0.50 Subordinate ratio 1.98 1.6 1.75 2.1 2.4 Stretching cost 1.747 1.747 1.747 1.747 1.747 Potential component PET / PBT PET / PBT PET / PBT PET / PBT PET / PBT Composite yarn manufacturing windage 2.1 2.1 2.1 2.1 2.1 Partially dried ginseng ingredient PET POY PET POY PET POY PET POY PET POY Composite speaker Strength (g / de ') 5.8 5.8 5.9 4.2 2.9 Shinto (%) 51 38 48 45 42 knitting Tactile (Softness) ○ △ ○ ○ △ Drape property (cm) 2.39 3.17 2.54 2.53 3.22 Weft ○ △ ○ ○ △

division Example
6 Example
7 Example
8 Example
9 Example
10 Manufacture of false wares The second over feed rate (OF2,%) 0.39 0.39 0.39 0.39 0.39 Subordinate ratio 1.3 1.7 2.3 2.8 1.98 Stretching cost 1.747 1.747 1.747 1.747 1.3 Potential component PET / PBT PET / PBT PET / PBT PET / PBT PET / PBT Composite yarn manufacturing windage 2.1 2.1 2.1 2.1 2.1 Partially dried ginseng ingredient PET POY PET POY PET POY PET POY PET POY Composite speaker Strength (g / de ') 5.8 5.8 5.5 5.2 5.8 Shinto (%) 48 47 46 41 43 knitting Tactile (Softness) × ○ ○ △ △ Drape property (cm) 3.09 2.56 2.58 3.83 3.02 Weft × ○ ○ × ×

division Example
11 Example
12 Example
13 Example
14 Example
15 Manufacture of false wares The second over feed rate (OF2,%) 0.39 0.39 0.39 0.39 0.39 Subordinate ratio 1.98 1.98 1.98 1.98 1.98 Stretching cost 1.6 1.9 2.2 1.747 1.747 Potential component PET / PBT PET / PBT PET / PBT PET / PBT PET / PBT Composite yarn manufacturing windage 2.1 2.1 2.1 1.6 1.9 Partially dried ginseng ingredient PET POY PET POY PET POY PET POY PET POY Composite speaker Strength (g / de ') 5.8 4.3 2.8 5.6 5.7 Shinto (%) 47 46 37 47 46 knitting Tactile (Softness) ○ ○ × × ○ Drape property (cm) 2.44 2.51 3.49 2.55 2.42 Weft ○ ○ × ○ ○

division Example
16 Example
17 Comparative Example
One Comparative Example
2 Comparative Example
3 Manufacture of false wares The second over feed rate (OF2,%) 0.39 0.39 0.39 0.39 0.39 Subordinate ratio 1.98 1.98 1.98 1.98 1.98 Stretching cost 1.747 1.747 1.747 1.747 1.747 Potential component PET / PBT PET / PBT PET / PBT PET / PTT PET / PBT Composite yarn manufacturing windage 2.4 3 - 2.1 2.1 Partially dried ginseng ingredient PET POY PET POY - PET POY PBT POY Composite speaker Strength (g / de ') 4.2 2.9 3.2 2.4 2.9 Shinto (%) 45 33 26 29 34 knitting Tactile (Softness) ○ ○ △ △ × Drape property (cm) 2.49 2.63 2.74 2.44 2.38 Weft ○ △ △ × △

As can be seen from Tables 1 to 4, in Examples 1, 2, and 3, which satisfied all of the second overfeed ratio, the subordinate ratio, the stretching ratio, the components of latent housing, the air pressure of the interlace nozzle, 5, 6, 9, 10, 13, 14, 17 and Comparative Examples 1 to 3 in which any one of 3, 4, 7, 8, 11, 12, The feeling of stretch, drape, and woven fabric were remarkably excellent.

Specifically, Examples 1, 3, and 4 satisfying the second overfeed rate range according to the present invention are superior in strength, elongation, and tactile sensation to Example 2, which is less than the second overfeed rate range, and Example 5, , Drape resistance and warpability were all excellent.

Examples 1, 7 and 8 satisfying the aspect ratio range according to the present invention were superior in tactile feeling, drape property and woven property to Example 6 having less than the subrange ratio, Strength, elongation, tactile sensation, drape property and warpability.

Further, Examples 1, 11, and 12 satisfying the stretching ratio range according to the present invention were superior in tactility, drape, and woven fabric to those of Example 10 having a stretching ratio, Elongation, touch, drape, and woven fabric.

Further, Examples 1, 15 and 16 satisfying the air pressure range of the interlace nozzle according to the present invention were superior in tactility, drape, and weavability compared to Example 14 having an air pressure range lower than that of Example 14, The strength, elongation, drapeability and warpage were superior to each other.

In addition, Example 1 in which composite yarn twist yarns were produced was superior in all of strength, elongation, touch, drape, and warpability to Comparative Example 1 produced up to false warp yarns.

In addition, Example 1 including a polyethylene terephthalate (PET) component and a polybutylene terephthalate (PBT) component as a constituent of the pottery housing was produced by mixing a polyethylene terephthalate (PET) component and a polytrimethylene Strength, elongation, tactile sensation, drapability and warpability as compared with Comparative Example 2 containing terephthalate (PTT) component.

Example 1 containing polyethylene terephthalate partially drawn yarn as a partially stretched yarn was superior in strength, elongation, tactile feeling, and woven fabric as compared with Comparative Example 3 containing a partially stretched polybutylene terephthalate partially drawn yarn.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: Buried temple 2: Partly opened temple
10: Krill 20: First feed roller
30: first heater 40: cooling plate
50: disk type combustor 60: second feed roller
70: second heater 80: third feed roller
90: Oil ring roller 100: First take-up roller
110: interlace nozzle 120: second take-up roller

Claims (7)

A latent housing including a polyethylene terephthalate (PET) component and a polybutylene terephthalate (PBT) component is supplied to the first feed roller, and then the first heater, the disk type combustor and the second feed roller are passed Simultaneously performing twisting and stretching, and then passing through a third feed roller to produce a false twist yarn; And
And interlacing the false twist yarn and the polyethylene terephthalate partially stretched yarn (PET POY)
Wherein the false twisting is performed at an aspect ratio of 1.7 to 2.3, and the stretching is performed at a stretching ratio of 1.6 to 1.9,
Wherein a first overfeed rate between the first feed roller and the second feed roller is 1 to 6%, and a second overfeed rate between the second feed roller and the third feed roller is 0.3 to 0.48% . delete delete The plasma display apparatus according to claim 1,
A first heater zone and a second heater zone having a length longer than the first heater zone,
The temperature of the first heater zone is 300 to 500 ° C, the temperature of the second heater zone is 200 to 350 ° C,
Wherein the first heater zone is higher in temperature than the second heater zone. The method according to claim 1,
Wherein the single-faced section of the potential housing has a cross-sectional shape selected from side-by-side, circular and hollow,
Wherein the latent housing comprises the polyethylene terephthalate (PET) component and the polybutylene terephthalate (PBT) component in a weight ratio of 6: 4 to 8: 2. The method according to claim 1,
Wherein the interlacing is performed at an air pressure of 1.8 to 2.5 bar. 7. A process for producing a polyurethane foam according to any one of claims 1 to 6,
Composite continuous yarn having a strength of 3 to 7 g / de 'and an elongation of 40% or more.

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