KR102479830B1 - Core-sheath type composite false-twist yarn and manufacturing method thereof - Google Patents

Abstract

The present invention relates to core-sheath type composite false-twisted yarn and a manufacturing method thereof and, more specifically, to core-sheath type composite false-twisted yarn and a manufacturing method thereof, wherein the fabric manufactured using the core-sheath type composite false-twisted yarn of the present invention is easy to perform dyeing with cation dye, has a soft touch, and has excellent elasticity and resilience.

Description

Core-sheath type composite false-twist yarn and manufacturing method thereof}

The present invention relates to a core-sheath-type composite false-twist yarn and a manufacturing method thereof, and more particularly, a fabric manufactured using the core-sheath-type composite false-twist yarn of the present invention is easy to dye, has a soft touch, and has excellent elasticity. It relates to a core sheath-type composite false-twist yarn having over-resilience and a manufacturing method thereof.

Conventional polyester-based synthetic fibers have been developed focusing on functionality (strength, warmth, light weight, sweat perspiration and quick drying) in order to improve basic characteristics and convenience as clothing. In addition to this, products that combine yarn modification and processing technology are being developed to express customer demand for the excellent texture and sensitivity of natural fibers.

As an example, to express the dry texture and pattern of natural fiber (linen), a thin & thick structure is formed on the surface of the yarn, resulting in natural light and shade in the appearance of the fabric, and consumers are interested in various products using it. this is being developed

However, in the case of polyester composite false-twist yarn, as it is manufactured by forming a fine loop structure between the core and the first yarn, the twist number (T/M) of the finished yarn is offset and the crimp is reduced, resulting in less shrinkage of the yarn during the dyeing process of the fabric. As a result, there is a problem in that the drapability and resilience of the fabric are lowered, and the wearing comfort is deteriorated when the fabric is manufactured into clothing.

In addition, for consumers who require a two-tone effect with a natural appearance, the polyester composite false-twist yarn is applied with cation dyeable polyester to the sheath yarn. When applied to, there is a problem that the soft touch is lowered.

In addition, latent crimp yarns, a type of polyester composite fiber, are applied in an array or spandex is used, but there is a problem in that a natural two-tone effect is not obtained and an artificial pattern and a flat appearance are formed during clothing production.

Accordingly, there is an urgent need to develop a cotton-like stretch fabric or yarn for knitting, which has a soft touch and volume of cotton and at the same time has a two-tone effect after dyeing and elasticity and repellency.

Korean Registered Patent No. 10-1784691 (published date: 2017.09.28)

The present invention has been devised to solve the above problems, and the fabric manufactured using the core-sheath type composite twist yarn of the present invention not only expresses a soft touch and natural two-tone effect even after dyeing, but also expresses elasticity and resilience. It is an object of the present invention to provide a core-sheath type composite false-twist yarn and a manufacturing method thereof.

In order to solve the above problems, the core-sheath type composite false twist yarn of the present invention includes a first component and a second component and has a plurality of first monofilament yarns having a side-by-side cross-sectional shape, a cation dye dye potential It may include a screening yarn including a crimped yarn and a first yarn including a partially drawn yarn disposed to surround the screening yarn and having a plurality of second mono-yarns.

According to a preferred embodiment of the present invention, the second component may include a modified polyester copolymerized with a monomer represented by Formula 1 below.

[Formula 1]

In Formula 1, R ₁ and R ₂ are each independently a C ₁ to C ₆ alkyl group.

According to a preferred embodiment of the present invention, the partially stretched yarn may have an elongation of 70 to 200%.

According to a preferred embodiment of the present invention, the modified polyester may be copolymerized by including 0.8 to 2.0% by weight of the monomer represented by Formula 1 above.

According to a preferred embodiment of the present invention, the cationic dye dyeable latent crimped yarn may have a fineness of 35 to 280 denier and a filament number of 12 to 96.

According to a preferred embodiment of the present invention, the cationic dye dyeable latent crimp yarn may have an elongation of 15 to 50%, a lithona shrinkage of 5 to 25%, and a residual shrinkage of 15 to 65%.

According to a preferred embodiment of the present invention, the partially drawn yarn may have a fineness of 30 to 300 denier and a filament number of 12 to 144.

According to a preferred embodiment of the present invention, the cationic dye dyeable latent crimp yarn may have an average number of expressed crimps of 5.0 to 20.0/CM and a microcrimp of 10 cycles/cm or less.

According to a preferred embodiment of the present invention, the weight ratio of the check yarn and the first yarn of the composite false-twist yarn may be 1:0.15 to 3.0.

According to a preferred embodiment of the present invention, the elongation difference between the cationic dye dye latent crimped yarn and the partially drawn yarn may be 20 to 185%.

According to a preferred embodiment of the present invention, the composite false-twist yarn may satisfy the following conditions (1) to (6).

(1) Fineness: 80 to 500 denier

(2) Number of filaments: 24 ~ 288

(3) Confidence: 15 ~ 50%

(4) Lisona shrinkage rate: 5 ~ 25%

(5) Residual shrinkage: 15 ~ 65%

(6) Number of revolutions between screening and first sanding: 80 ~ 120 times/m

On the other hand, the manufacturing method of the core-sheath type composite false-twist yarn of the present invention includes cationic dye dyeable latent crimped yarn having a plurality of first monoyarns having a side-by-side cross-sectional shape, including a first component and a second component, and 1st step of preparing partially drawn yarns having a plurality of second monoyarns, 2nd step of manufacturing tangled yarns by air entanglement of latent crimped yarns and partially drawn yarns, and core sheath type composite draw-twisted yarn by twisting and drawing tangled yarns It includes a third step of preparing, and the second component includes a modified polyester copolymerized with a monomer represented by Formula 1 below, and the partially stretched yarn may have an elongation of 70 to 200%.

[Formula 1]

In Formula 1, R ₁ and R ₂ are each independently a C ₁ to C ₆ alkyl group.

The core-sheath type composite false-twist yarn of the present invention is easy to dye the fabric manufactured using the core-sheath type composite false-twist yarn of the present invention, and after dyeing, it can express a soft touch feeling and a natural two-tone effect, as well as elasticity and resilience. .

1 is a cross-sectional view of a core-sheath type composite false twist yarn according to a preferred embodiment of the present invention.
2 is an enlarged photograph of the appearance of the core-sheath type composite false-twist yarn manufactured in Example 1 according to a preferred embodiment of the present invention.
3 is a schematic diagram of a process for manufacturing a core-sheath type composite false-twist yarn according to a preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein. In order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are added to the same or similar components throughout the specification.

Referring to FIG. 1 , the core-sheath type composite twisted yarn 100 of the present invention includes a core portion 110 and a sheath portion 120 disposed to surround the core portion 110 .

First, the core part 110 of the present invention may include a cationic dye dye latent crimped yarn having a plurality of first mono yarns. At this time, the cationic dye dyeable latent crimped yarn is easy to dye cationic, and can perform the function of improving elasticity and resilience.

The first monoyarn may be manufactured by composite spinning of the first component and the second component, may include the first component and the second component, and may have a side-by-side cross-sectional shape. Also, the cross-sectional shape may be peanut-shaped or circular, preferably circular.

The first component may include polyester, and the polyester may include at least one selected from polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polytrimethylene terephthalate, preferably. Preferably, polyethylene terephthalate (PET) may be included.

In addition, the second component may include a modified polyester copolymerized with a monomer represented by Formula 1 below, and the polyester may include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polytrimethylene terephthalate. One or more selected from phthalates may be included, and preferably polyethylene terephthalate (PET) may be included.

[Formula 1]

In Formula 1, R ₁ and R ₂ are each independently a C ₁ to C ₆ alkyl group, preferably a C ₁ to C ₃ alkyl group.

As an example, polyethylene terephthalate (PET) may be prepared by polymerizing ethylene glycol and terephthalic acid, and modified polyethylene terephthalate (PET) is 0.8 to 2.0% by weight of the monomer represented by Formula 1, preferably 1.0 to 2.0% by weight. It may be copolymerized by including 1.5% by weight. If the amount of the monomer represented by Chemical Formula 1 is less than 0.8% by weight, there may be a problem of deterioration in dyeability, and if it exceeds 2.0 mol%, there may be a problem of deterioration in strength, elasticity, workability and fairness of the fiber.

In addition, the first monosarn of the present invention may have a fineness of 1 to 10 denier, preferably 3 to 6 denier, and if the fineness is less than 1 denier, there may be a problem of deterioration in elasticity and fairness, and if the fineness exceeds 10 denier, However, since air entanglement performed in the manufacturing process of the core-sheath type composite false-twist yarn of the present invention is not easy, there may be a problem of deterioration in elasticity.

On the other hand, the cationic dye dyeable latent crimped yarn of the present invention may include the first component and the second component in a weight ratio of 1: 0.5 to 1.5, preferably 1: 0.7 to 1.3.

In addition, the dyeable latent crimp yarn of the present invention may have a fineness of 35 to 280 denier, preferably 55 to 200 denier, and more preferably 55 to 95 denier, and if the fineness is less than 35 denier, elongation and rebound There may be a problem of deterioration of property, and if it exceeds 280 denier, there may be a problem of deterioration of fairness.

In addition, the cationic dye dyeable latent crimp yarn of the present invention may have a filament number of 12 to 96, preferably 18 to 48, and more preferably 18 to 30, and if the number of filaments is less than 12, there may be a problem of lowering fairness If it exceeds 96, there may be a problem of deterioration in elasticity and resilience.

In addition, the cationic dye dye latent crimp yarn of the present invention may have an average crimp number of 5.0 to 20.0 / cm, preferably 8.0 to 16.0 / cm, and if the average crimp number is less than 5.0 / cm or exceeds 20.0 / cm However, since air entanglement performed in the manufacturing process of the core-sheath type composite false-twist yarn of the present invention is not easy, there may be a problem of deterioration in elasticity.

In addition, the cationic dye dyeable latent crimp yarn of the present invention may have a microcrimp of 10 cycles/cm or less, preferably 8 cycles/cm or less, and more preferably 2 to 5 cycles/cm. If the cycle / cm is exceeded, there may be a problem of greatly causing false twisting defects.

In addition, the cationic dye dyeable latent crimp yarn of the present invention may have an elongation of 15 to 50%, preferably 20 to 40%, more preferably 20 to 30%, and even more preferably 23 to 27%, If the elongation is less than 15%, there may be a problem of cutting in the process, and if it exceeds 50%, there may be a problem of the number of rotations between screening and second yarn.

In addition, the cationic dye dyeable latent crimp yarn of the present invention has a Leesona shrinkage of 5 to 25%, preferably 7 to 20%, more preferably 9 to 15%, and even more preferably 11 to 25%. It may be 15%, and if the shrinkage ratio of lithodic is less than 5%, there may be a problem of deterioration in elasticity and resilience, and if it exceeds 25%, there may be a problem of process workability. At this time, the lithona shrinkage rate of the dyeable latent crimping yarn of the cationic dye of the present invention is the original state of the contracted length after heat treatment in water at 82 ± 3 ° C. for 10 minutes by applying a load of 20.5g to the latent crimping yarn in the skein state It can be calculated as a percentage of length.

In addition, the cationic dye dyeable latent crimp yarn of the present invention has a residual shrinkage of 15 to 65%, preferably 20 to 60%, more preferably 25 to 55%, and still more preferably 45 to 65%. It may be 50%, and if the residual shrinkage is less than 15%, there may be a problem of deterioration in elasticity and resilience, and if it exceeds 65%, there may be a problem in process workability. At this time, the residual shrinkage of the dyeable latent crimped yarn of the cationic dye of the present invention is the original state of the contracted length after heat treatment in water at 82 ± 3 ° C. for 10 minutes by applying a load of 1.5g to the latent crimped yarn in the skein state. It can be calculated as a percentage of length.

In addition, the cationic dye dye latent crimped yarn of the present invention may be a blended yarn.

Next, the sheath 120 of the present invention may include a partially drawn yarn having a plurality of second mono yarns. At this time, the partially stretched yarn may perform a function of improving a sense of touch and a sense of volume.

The second mono yarn may be a polyester fiber, and the polyester may include at least one selected from polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polytrimethylene terephthalate, preferably. may include polyethylene terephthalate (PET).

Meanwhile, the partially stretched yarn of the present invention may have a fineness of 30 to 300 denier, preferably 40 to 200 denier, more preferably 60 to 100 denier, and even more preferably 80 to 100 denier, if the fineness is 30 denier. If it is less than 300 denier, there may be a problem of deteriorating volume and touch, and if it exceeds 300 denier, there may be a problem of deterioration of fairness.

In addition, the partially drawn yarn of the present invention may have a filament number of 12 to 144, preferably 24 to 108, more preferably 36 to 96, and still more preferably 40 to 60, and if the number of filaments is less than 12, the twist fairness is There may be a problem of degradation, and if it exceeds 144, there may be a problem of passing through the weaving process.

In addition, the partially stretched yarn of the present invention may have an elongation of 70 to 200%, preferably 100 to 150%, and more preferably 120 to 140%, and if the elongation is less than 70%, the microloop forming effect is reduced. There may be, and if it exceeds 200%, there may be a problem that fairness is significantly lowered.

On the other hand, the elongation difference between the dyeable latent crimping yarn and the partially drawn yarn may be 20 to 185%, preferably 70 to 160%, more preferably 100 to 145%, and even more preferably 100 to 115% , If the elongation difference is less than 20%, there may be a problem of soft touch of the woven fabric, and if it exceeds 185%, there may be a problem of false twist fairness.

Furthermore, the weight ratio of the core part 110 and the sheath part 120 of the core-sheath type composite twist yarn 100 of the present invention is 1:0.15 to 3.0, preferably 1:1.0 to 2.0, more preferably 1:1.0 to 1.5 It may have a weight ratio, and if the weight ratio is less than 1: 0.15, there may be a problem of soft touch of the woven fabric, and if it exceeds 1: 3.0, there may be problems in elasticity and resilience.

In addition, the core-sheath type composite false twist yarn of the present invention may have a fineness of 80 to 500 denier, preferably 100 to 400 denier, more preferably 120 to 300 denier, and even more preferably 140 to 200 denier, if the fineness is If it is less than 80 denier, there may be a problem of two-tone effect after dyeing, and if it exceeds 500 denier, there may be a problem of soft touch.

In addition, the core-sheath type composite false-twist yarn of the present invention may have a filament number of 24 to 288, preferably 36 to 216, more preferably 48 to 196, and still more preferably 60 to 96, and if the number of filaments is less than 24, air As entanglement is not easy, there may be a problem of deterioration in fairness, and if it exceeds 288, there may be a problem in passability of the weaving process.

In addition, the core-sheath type composite false twist yarn of the present invention may have an elongation of 15 to 50%, preferably 18 to 40%, more preferably 18 to 25%, and even more preferably 18 to 22%, if the elongation is If it is less than 15%, there may be a problem of fairness, and if it exceeds 50%, there may be a problem of passing the weaving process.

In addition, the core-sheath type composite false-twist yarn of the present invention may have a boiling water shrinkage of 3 to 10%, preferably 4 to 8%, and if the boiling water shrinkage is less than 3%, problems in elasticity and resilience may occur. If it exceeds 10%, there may be a problem with post-processing control. At this time, the boiling water shrinkage rate is measured by measuring the length of the composite twist yarn by applying a load of fineness (denier) * 2g, and then treating the composite twist yarn in boiling water at 100 ° C for 30 minutes to measure the length of the composite twist yarn after drying. Calculated by Equation 1.

[Equation 1]

In addition, the core-sheath type composite twist yarn of the present invention has a Leesona shrinkage of 5 to 25%, preferably 8 to 20%, more preferably 10 to 17%, and even more preferably 11 to 15%. If the litho shrinkage rate is less than 5%, there may be problems with elasticity and resilience, and if it exceeds 25%, there may be a problem with post-processing control. At this time, the lithona shrinkage rate of the core-sheath-type composite false-twist yarn of the present invention is determined by applying a load of 20.5 g to the core-sheath-type composite false-twist yarn in a skein state, heat treatment in water at 82 ± 3 ° C for 10 minutes, and then the contracted length is equal to the original length of the twisted yarn. It can be calculated as a percentage of

In addition, the core-sheath type composite false twist yarn of the present invention has a residual shrinkage of 15 to 65%, preferably 20 to 60%, more preferably 25 to 55%, and still more preferably 35 to 45% If the residual shrinkage is less than 15%, there may be problems with elasticity and resilience, and if it exceeds 65%, there may be problems with post-processing control. At this time, the residual shrinkage of the core-sheath-type composite twist yarn of the present invention is obtained by applying a load of 1.5 g to the core-sheath-type composite twist yarn in a skein state and heat treatment in water at 82 ± 3 ° C. for 10 minutes. It can be calculated as a percentage of

In addition, the core-sheath type composite false-twist yarn of the present invention may have a strength of 1.0 to 5.0 g/denier, preferably 2.0 to 4.5 g/denier, and more preferably 2.0 to 3.0 g/denier, if the strength is 1.0 g/denier. If it is less than that, there may be a problem in the workability of the weaving process.

In addition, the core-sheath-type composite false twist yarn of the present invention may have a rotation number of 80 to 120 times/m, preferably 85 to 115 times/m, and more preferably 100 to 115 times/m between the screening and the sheathing yarn. If the number of rotations between super yarns is less than 80 times/m, there may be a problem of soft touch, and if it exceeds 120 times/m, there may be a problem of reducing the two-tone effect after dyeing. At this time, the number of rotations between the screening and the weaving yarn is a value defined by measuring how many times the weaving yarn of the composite false-twist yarn rotates per unit length (1m).

Meanwhile, the fabric of the present invention includes the core-sheath type composite twist yarn of the present invention.

The fabric as a term used in the present invention is meant to include both woven and knitted fabrics.

The fabric of the present invention may be a fabric woven by using the core-sheath type composite false twist yarn of the present invention as one or more of warp and weft yarns.

At this time, weaving may be performed by any one method selected from the group consisting of plain weave, twill weave, satin weave, and double weave.

However, it is not limited to the description of the fabric structure, and the warp and weft yarn density in weaving is not particularly limited.

In addition, the fabric may be a knitted fabric including the core-sheath type composite false twist yarn of the present invention. The knitting may be performed by weft knitting or warp knitting, and the specific method of weft knitting and warp knitting may be by conventional weft knitting or warp knitting.

Further, the manufacturing method of the core-sheath-type composite false-twist yarn of the present invention includes first to third steps, and will be described with reference to a schematic diagram of a process for manufacturing the core-sheath-type composite false-twist yarn of FIG. 3 as follows.

First, in the first step of the manufacturing method of the core-sheath type composite false-twist yarn of the present invention, a cationic dye-dyed latent crimped yarn 11 having a plurality of first mono yarns having a side-by-side cross-sectional shape and a plurality of second A partially drawn yarn 12 comprising mono yarns can be prepared.

The cationic dye dye latent crimped yarn 11 of the first step can be manufactured through steps (1) to (5).

First, in step (1) of the manufacturing method of dyeable latent crimped yarn 11 of the present invention, a first component and a second component may be prepared.

The first component may include a polyester chip, and the polyester may include at least one selected from polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polytrimethylene terephthalate, preferably. Preferably, polyethylene terephthalate (PET) may be included.

In addition, the second component may include a modified polyester chip copolymerized with a monomer represented by Formula 1 below, and the polyester may include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polytrimethylene. It may include one or more selected from terephthalate, preferably polyethylene terephthalate (PET).

[Formula 1]

In Formula 1, R ₁ and R ₂ are each independently a C ₁ to C ₆ alkyl group, preferably a C ₁ to C ₃ alkyl group.

As an example, polyethylene terephthalate (PET) may be prepared by polymerizing ethylene glycol and terephthalic acid, and modified polyethylene terephthalate (PET) is 0.8 to 2.0% by weight of the monomer represented by Formula 1, preferably 1.0 to 2.0% by weight. It may be copolymerized by including 1.5% by weight.

Next, in step (2) of the manufacturing method of dyeable latent crimped yarn 11 of the present invention, the first component and the second component prepared in the first step are melted, and composite spinning is performed so that the cross-sectional shape is side-bye - It is possible to manufacture the first mono yarn of the side type.

At this time, melting can be performed at a temperature higher than the melting point of the first component and the second component, in other words, at a temperature at which the first component and the second component can be completely melted, preferably the first component is 230 ° C. It can be melted at a temperature of 280 ° C, preferably 240 ° C to 270 ° C, more preferably 250 ° C to 260 ° C. In addition, the second component may be melted by applying a temperature of 260 ° C to 290 ° C, preferably 265 ° C to 285 ° C, more preferably 270 ° C to 280 ° C, if the melting temperature is out of the above range, the first component There may be problems in that the components and/or the second component do not properly melt or a weight deviation (denier) occurs due to discharge pressure hunting.

In addition, composite spinning can be performed through a composite spinneret. At this time, the composite spinneret can use a general composite spinneret used in the art. As a preferred example, the odd number per 114.5Φ of the spinneret area is 10 to 50 holes, preferably 12 to 48 holes, more preferably 20 to 40 holes per 114.5 Φ of the confinement area. In addition, a composite spinneret including a spinneret having a composite spinning angle of 10 ° to 25 °, preferably 18 ° to 25 °, more preferably a composite spinning angle of 18 ° to 20 ° may be used.

If the composite spinneret has less than 10 holes per confinement area of 114.5 Φ, productivity may decrease, and if the number of holes per confinement area of 114.5 Φ exceeds 50 holes, there may be a problem of poor spinability. In addition, if the composite spinning angle is less than 10 °, there may be a problem of poor radioactivity due to poor ejection due to the generation of curved yarn during ejection of the mold, and if it exceeds 25 °, the number of holes for manufacturing the mold is small, and the manufacturing cost of the mold may increase.

In addition, the shape of the discharge hole of the composite spinneret may be a diagonal shape, and the composite spinneret may have a circular flow path shape, but is not limited thereto.

In addition, during composite spinning, the discharge pressure of the melted first component is 100 to 170 kg/cm ² , preferably 110 to 150 kg/cm ² , and more preferably 130 to 145 kg/cm ² . , If the discharge pressure is less than 100 kg/cm ² , there may be a problem of weight deviation (denier) due to too little discharge, and if the discharge pressure exceeds 170 kg/cm ² , leakage (leakage) ) may cause problems.

In addition, the discharge pressure of the melted second component is 60 to 160 kg/cm ² , preferably 80 to 150 kg/cm ² , and preferably 90 to 110 kg/cm ² . If the discharge pressure is If it is less than 60 kg/cm ² , there may be a problem of weight deviation (denier), and if the discharge pressure exceeds 160 kg/cm ² , too much of the second component having a relatively low viscosity compared to the first component is discharged and melted. There may be a problem in that leakage occurs at the bolted joint or the like.

In addition, the composite spinning is preferably performed at a spinning speed of 1,200 to 6,000 m/min, preferably 3,000 to 5,000 m/min and a spinning temperature of 260° C. to 270° C. in terms of spinnability. At this time, if the spinning speed is less than 1,200 m/min, the spinning workability is excellent, but there is a problem that gaps occur due to excessive drawing, and if the spinning speed exceeds 6,000 m/min, the number of B/O increases too much and the monofilament ends there may be a problem with Here, the B/O means that only some of the entire strands are cut during radiation trimming.

On the other hand, composite spinning may be performed by composite spinning of the first component and the second component at a weight ratio of 1: 0.5 to 1.5, preferably at a weight ratio of 1: 0.7 to 1.3, and if the weight ratio is out of the above range, mono during solidification There may be a problem in that spinning workability and workability are remarkably deteriorated due to a blowout in which the filament is separated from the yarn thread or a meandering phenomenon in which the monofilament is biased in one direction on the surface of the spinneret.

In addition, the first monosarn produced by composite spinning may have a fineness of 1 to 10 denier, preferably 3 to 6 denier.

Furthermore, the method for producing the cationic dye dyeable latent crimped yarn 11 of the present invention may further include a step of cooling the first mono yarn produced by composite spinning, which cooling is used in the art A general cooling method can be used, and cooling is performed under conditions of a cooling temperature of 10 ° C to 28 ° C, preferably 10 ° C to 22 ° C and a cooling rate of 0.20 to 0.60 m / sec, preferably 0.45 to 0.50 m / sec. At this time, if the cooling temperature is less than 10 ℃, there may be a problem that the solidification defect deviation occurs, and if it exceeds 28 ℃, there may be a problem such as a decrease in strength due to a solidification defect. In addition, if the cooling rate is less than 0.20 m / sec, it is disadvantageous in terms of productivity, and if the cooling rate exceeds 0.60 m / sec, there may be a problem of poor radioactivity (B / O occurrence).

Next, in step (3) of the manufacturing method of dyeable latent crimped yarn 11 of the present invention, the first monofilament prepared in step (2) may be oiled and then stretched.

The oil refueling treatment in step (3) is performed to reduce friction such as post-processing, and can be performed by a general method used in the art, preferably using an oil-roll and an oil-guide. guide) can be used.

In addition, the stretching in step (3) can be performed by a general method used in the art, and a stretching ratio of 1.2 to 4.5 times, preferably a stretching ratio of 1.8 to 3.9 times, and more preferably a stretching ratio of 1.8 to 2.4 times. If the draw ratio is less than 1.2 times, the problem of poor sensitivity of the composite fiber may occur, and if the draw ratio exceeds 4.5 times, the microcrimp cycle increases, improving post-processing twister and weaving workability. Problems that cause defects may occur.

In addition, the stretching in step (3) is specifically, 60 ~ 100 ℃, preferably 60 ~ 80 ℃, more preferably 60 ~ 70 ℃ temperature at a rate of 1,800 ~ 2,500 mpm, preferably 2,200 ~ 2,400 mpm After the first stretching is performed, the second stretching may be continuously performed at a temperature of 110 to 140° C., preferably 115 to 130° C., at a rate of 3,000 to 5,500 mpm, preferably 4,000 to 5,000 mpm. If the temperature of the first drawing is less than 60 ° C or the temperature of the second drawing is less than 110 ° C, as the cycle of microcrimp increases, problems that cause post-processing twister and poor weaving workability may occur, and the first drawing When the temperature of the stretching exceeds 100 ° C or the temperature of the secondary stretching exceeds 140 ° C, dyeability is lowered and workability and workability may be poor.

Next, in step (4) of the manufacturing method of dyeable latent crimped yarn 11 of the present invention, the first monofilament drawn in step (3) may be heat-set.

At this time, the heat setting may be performed at a temperature of 110 to 150 ° C, preferably 110 to 140 ° C, more preferably 115 to 130 ° C, and if the heat setting temperature is less than 110 ° C, the cycle of microcrimp increases. Accordingly, problems of causing post-processing twister and poor weaving workability may occur, and when the temperature exceeds 150 ° C, problems of deterioration of elasticity, dyeability, workability and workability may occur.

Finally, in step (5) of the manufacturing method of the cationic dye dyeable latent crimped yarn 11 of the present invention, the first monofilament heat-set in step (4) is mixed with a plurality of yarns to obtain a mixed fiber type cationic dye dyeable Latent crimped yarn 11 can be manufactured.

The prepared cationic dye dyeable latent crimped yarn 11 may have a fineness of 35 to 280 denier, preferably 55 to 200 denier, and more preferably 55 to 95 denier. In addition, the prepared cationic dye dyeable latent crimped yarn 11 may have 12 to 96 filaments, preferably 24 to 48 filaments. In addition, the prepared cationic dye dyeable latent crimp yarn 11 may have an average number of crimps of 5.0 to 20.0/cm, preferably 8.0 to 16.0/cm. In addition, the prepared cationic dye dyeable latent crimped yarn 11 may have a microcrimp of 10 cycles/cm or less, preferably 8 cycles/cm or less, and more preferably 2 to 5 cycles/cm. In addition, the prepared cationic dye dyeable latent crimp yarn 11 has an elongation of 15 to 50%, preferably 20 to 40%, more preferably 20 to 30%, even more preferably 23 to 27%, Lee Leesona shrinkage is 5 to 25%, preferably 7 to 20%, more preferably 9 to 15%, still more preferably 11 to 15%, residual shrinkage is 15 to 65 %, preferably 20 to 60%, more preferably 25 to 55%, and even more preferably 45 to 50%.

The partially stretched yarn 12 in the first step may be prepared by spinning a polyester yarn to prepare a second mono yarn, and having a plurality of second mono yarns, and spinning conditions are conventional in the art. Any condition that can be used can be used without limitation, and preferably, it can be produced by spinning under conditions of a spinning speed of 2,500 to 3,500 mpm (m/min).

In addition, the prepared partially drawn yarn 12 may have a fineness of 30 to 300 denier, preferably 40 to 200 denier, more preferably 60 to 100 denier, and still more preferably 80 to 100 denier, and the number of filaments It may be 12 to 144, preferably 24 to 108, more preferably 36 to 96, and even more preferably 40 to 60.

In addition, the prepared partially drawn yarn 12 may have an elongation of 70 to 200%, preferably 100 to 150%, and more preferably 120 to 140%.

On the other hand, the prepared cationic dye dyeable latent crimped yarn 11 and the prepared partially stretched yarn 12 have a difference in elongation of 20 to 185%, preferably 70 to 160%, more preferably 100 to 145%, more More preferably, it may be 100 to 115%.

Next, in the second step of the manufacturing method of the core sheath-type composite twist-twisted yarn of the present invention, the dyeable latent crimped yarn 11 prepared in the first step and the partially drawn yarn 12 are air-tangled to produce tangled yarn. there is.

Specifically, the second step is to pass the dyed latent crimped yarn 11 and the partially stretched yarn 12 through the 0th feed roller 21 and entangle the air through the interlaced nozzle 30 to prepare interlaced yarn. can do.

At this time, the cationic dye dye latent crimped yarn 11 and partially stretched yarn 12 can be passed through the 0th feed roller 21 at a yarn speed of 200 to 900 mpm, and the conditions for air entanglement are conventional in the art Any condition that can be used can be used without limitation, preferably at an air pressure of 1 to 4 kg/cm 2 , more preferably at an air pressure of 2 to 3 kg/cm 2 . If the air pressure is less than 1 kg / cm 2, the dyeing uniformity and touch feeling may be deteriorated because the blending is not performed well, and if it exceeds 4 kg / cm 2, dyeing uniformity and touch feeling may be deteriorated due to yarn shape damage .

At this time, the zeroth overfeed rate (OF 0) representing the ratio between the speeds between the zeroth feed roller 21 and the first feed roller 22 described later is 1.0 to 10%, preferably 1.0 to 8%, More preferably, it may be 1.0 to 1.1%.

On the other hand, the interlaced nozzle can be used without limitation as long as it is an interlaced nozzle commonly used in the art, and preferably can be made through a 45° air blowing type ATY nozzle in three directions.

Next, in the third step of the manufacturing method of the core-sheath-type composite false-twist yarn of the present invention, the interwoven yarn prepared in the second step may be twisted and drawn to manufacture the core-sheath-type composite false-twist yarn.

Specifically, in the third step, the interlaced yarn manufactured in the second step is supplied to the first feed roller 22 to operate the first heater 41, the cooler 50, the combustor 60, and the second feed roller ( 23) to perform false twisting and drawing, and then pass through the second heater 42 and the third feed roller 24 to manufacture core-sheath type composite false-twist yarn.

At this time, the temperature of the first heater 41 may be 140 ~ 210 ℃, preferably 150 ~ 200 ℃.

In addition, the interwoven yarn passing through the first heater 41 passes through the cooler 50. In this case, the cooler 50 may have a temperature of 10 to 40 ° C, preferably 15 to 35 ° C. . After passing through the first heater 41, the interwoven yarn passes through the cooler 50 to lower its temperature, and then twists and untwists back and forth while passing through the combustor 60. At this time, the false twisting may be performed at a temperature of 140 to 210 ° C, preferably 150 to 200 ° C. If the combustible temperature is out of the range, it may be difficult to exhibit excellent effects in terms of dyeability, touch feeling, and elasticity.

In addition, the interwoven yarn passing through the twinning machine 60 passes through the second feed roller 23 . Elongation occurs due to the difference in linear speed between the first feed roller 22 and the second feed roller 23, and the interwoven yarn has a first heater installed between the first feed roller 22 and the second feed roller 23. Since it passes through (41), stretching and false twisting are possible at the same time.

In addition, the stretching ratio is defined as the speed of the second feed roller/speed of the first feed roller, and the stretching ratio may be 1 to 1.3, preferably 1.1 to 1.2. If the draw ratio is less than 1, the tension is lowered, which may cause fairness problems, and if it exceeds 1.3, excessive tension may cause yarn breakage during the process.

The interwoven yarn passing through the twinning machine 60 passes through the second feed roller 23 and then the third feed roller 24, and the second heater 42 is installed therebetween. The second heater 42 may have a temperature of 10 to 40°C, preferably 15 to 35°C.

In addition, the interwoven yarn that has passed through the third feed roller 24 can be applied with oil while passing through the oiling roller 70, and then wound around the take-up roller 80 to manufacture core-sheath type composite false-twist yarn.

On the other hand, the second overfeed rate (OF 2 ) representing the ratio between the speeds of the second feed roller 23 and the third feed roller 24 may be 0.5 to 6%, preferably 1 to 5.5%. can If the second overfeed rate is less than 0.5%, problems such as non-uniform entanglement or difficulty in expressing a desired level of touch may occur, and if it exceeds 6%, the overall tension balance is shaken, causing problems in DTY workability. can happen

Furthermore, the method for manufacturing core-sheath-type composite false-twist yarn according to an embodiment of the present invention may further include, after the third stage, a fourth step of winding the core-sheath-type composite false-twist yarn that has passed through the third feed roller around a take-up roller. there is.

At this time, the third overfeed rate (OF 3) representing the ratio between the speeds between the third feed roller 24 and the take-up roller 80 may be 1 to 8%, preferably 1.5 to 7.5%. there is. If the third overfeed rate is less than 1%, the tension is too high, and problems such as damage to fabricated threads and poor workability may occur, and if it exceeds 8%, the tension is too low, and problems of poor workability may occur.

Meanwhile, the speed of each feed roller may be appropriately changed and used within a range that satisfies the range of the overfeed rate.

In the above, the present invention has been described with a focus on embodiments, but this is only an example and does not limit the embodiments of the present invention, and those skilled in the art to which the embodiments of the present invention belong will appreciate the essential characteristics of the present invention. It will be appreciated that various modifications and applications not exemplified above are possible within a range that does not deviate. For example, each component specifically shown in the embodiment of the present invention can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

Preparation Example 1: Preparation of cationic dye dyeable latent crimp yarn

(1) Prepare a polyethylene terephthalate (PET) chip as a first component, and prepare a copolymerized modified polyethylene terephthalate (PET) chip containing 1.43% by weight of a monomer represented by Formula 1-1 as a second component. did

[Formula 1-1]

In Formula 1-1, R ₁ and R ₂ are methyl groups.

(2) The prepared first component is melted at a temperature of 255 ° C, the prepared second component is melted at a temperature of 275 ° C, and then the melted first and second components are mixed with 24 holes per 114.5 Φ confinement area. A first monofilament having a fineness of 3.1 denier and a side-by-side cross-sectional shape was manufactured by composite spinning using a spinneret.

The shape of the discharge hole of the composite spinneret was an oblique shape, and the composite spinneret had a circular flow path shape. In addition, the discharge pressure for the melted first component was 135 kg/cm2, the discharge pressure for the melted second component was 100 kg/cm2, the composite spinning temperature was 265° C., and B/H (bottom heater) The temperature was 280° C., and the spinning speed was 4500 mpm. In addition, the melted first component and the second component were subjected to composite spinning at a weight ratio of 50:50.

In addition, the first monofilament produced by composite spinning was cooled at a temperature of 15°C to 16°C at a speed of 0.47 m/sec and a length of 1,000 mm.

(3) The cooled first monofilament is oiled on an oil roll, and then first drawn at a draw ratio of 2.1 times at a temperature of 65°C at a speed of 1,500 mpm, followed by a temperature of 120°C. Secondary stretching was performed at a speed of 4,500 mpm.

(4) The stretched first mono yarn was heat-set at a temperature of 120°C.

(5) A plurality of heat-set first monofilament yarns were mixed to prepare cationic dye dye-dyeing latent crimped yarn in the form of mixed filaments having a fineness of 75 denier and a number of filaments of 24 as shown in FIG. 2.

Preparation Example 2: Preparation of cationic dye dyeable latent crimped yarn

Cationic dye dyeable latent crimped yarn was prepared in the same manner as in Preparation Example 1. However, unlike Preparation Example 1, a plurality of heat-set first monofilament yarns were mixed to prepare cationic dye-dyeing latent crimp yarns in the form of mixed yarns having a fineness of 100 denier and a number of filaments of 24.

Preparation Example 3: Preparation of cationic dye dyeable latent crimped yarn

Cationic dye dyeable latent crimped yarn was prepared in the same manner as in Preparation Example 1. However, unlike Preparation Example 1, a plurality of heat-set first monofilament yarns were mixed to prepare cationic dye-dyeing latent crimped yarn in the form of a mixed yarn having a fineness of 300 denier and a number of filaments of 12.

Preparation Example 4: Preparation of cationic dye dyeable latent crimped yarn

Cationic dye dyeable latent crimped yarn was prepared in the same manner as in Preparation Example 1. However, unlike Preparation Example 1, a plurality of heat-set first monofilament yarns were mixed to prepare cation dye-dyeing latent crimped yarn in the form of a mixed yarn having a fineness of 30 denier and a number of filaments of 24.

Preparation Example 5: Preparation of cationic dye dyeable latent crimped yarn

Cationic dye dyeable latent crimped yarn was prepared in the same manner as in Preparation Example 1. However, unlike Preparation Example 1, a plurality of heat-set first monofilament yarns were mixed to prepare cation dye-dyeing latent crimped yarns in the form of mixed yarns having a fineness of 50 denier and a number of filaments of 96.

Preparation Example 6: Preparation of cationic dye dyeable latent crimp yarn

Cationic dye dyeable latent crimped yarn was prepared in the same manner as in Preparation Example 1. However, unlike Preparation Example 1, the first monofilament yarn was drawn at a draw ratio of 2.25 times to finally prepare cationic dye dyeable latent crimp yarn.

Preparation Example 7: Preparation of cationic dye dyeable latent crimped yarn

Cationic dye dyeable latent crimped yarn was prepared in the same manner as in Preparation Example 1. However, unlike Preparation Example 1, the first monofilament yarn was drawn at a draw ratio of 3.75 times to finally prepare cationic dye dyeable latent crimp yarn.

Preparation Example 8: Preparation of cationic dye dyeable latent crimped yarn

Cationic dye dyeable latent crimped yarn was prepared in the same manner as in Preparation Example 1. However, unlike Preparation Example 1, the first monofilament yarn was drawn at a draw ratio of 1.32 times to finally prepare cationic dye dyeable latent crimp yarn.

Preparation Example 9: Preparation of cationic dye dyeable latent crimp yarn

Cationic dye dyeable latent crimped yarn was prepared in the same manner as in Preparation Example 1. However, unlike Preparation Example 1, a modified polyethylene terephthalate (PET) chip copolymerized with 1.43% by weight of the monomer represented by Formula 1-1 as the second component was not used, and the Using a modified polyethylene terephthalate (PET) chip copolymerized with 0.73% by weight of the monomer, a cationic dye dyeable latent crimped yarn was finally prepared.

Preparation Example 10: Preparation of cationic dye dyeable latent crimped yarn

Cationic dye dyeable latent crimped yarn was prepared in the same manner as in Preparation Example 1. However, unlike Preparation Example 1, a modified polyethylene terephthalate (PET) chip copolymerized with 1.43% by weight of the monomer represented by Formula 1-1 as the second component was not used, and the Using a modified polyethylene terephthalate (PET) chip copolymerized with 1.83% by weight of the monomer, a cationic dye dyeable latent crimped yarn was finally prepared.

Preparation Example 11: Manufacture of latent crimp yarn

(1) A polyethylene terephthalate (PET) chip having an intrinsic viscosity of 0.50 was prepared as a first component, and a polyethylene terephthalate (PET) chip having an intrinsic viscosity of 0.65 was prepared as a second component.

(2) The prepared first component is melted at a temperature of 255 ° C, the prepared second component is melted at a temperature of 290 ° C, and then the melted first and second components are melted into a complex with 24 holes per 114.5 Φ confinement area. A first monofilament having a fineness of 3.1 denier and a side-by-side cross-sectional shape was manufactured by composite spinning using a spinneret.

The shape of the discharge hole of the composite spinneret was an oblique shape, and the composite spinneret had a circular flow path shape. In addition, the discharge pressure for the melted first component was 135 kg/cm2, the discharge pressure for the melted second component was 100 kg/cm2, the composite spinning temperature was 265° C., and B/H (bottom heater) The temperature was 280° C., and the spinning speed was 4500 mpm. In addition, the melted first component and the second component were subjected to composite spinning at a weight ratio of 50:50.

In addition, the first monofilament produced by composite spinning was cooled at a temperature of 15°C to 16°C at a speed of 0.47 m/sec and a length of 1,000 mm.

(3) The cooled first monofilament is oiled on an oil roll, and then first drawn at a drawing ratio of 2.1 times at a temperature of 95°C at a speed of 1,500 mpm, followed by a first drawing at a temperature of 125°C. Secondary stretching was performed at a speed of 4,500 mpm.

(4) The stretched first mono yarn was heat-set at a temperature of 125°C.

(5) A latent crimped yarn in the form of a mixed yarn having a fineness of 75 denier and a number of filaments of 24, as shown in FIG.

Preparation Example 12: Preparation of general cationic dye dyeable filament yarn

A general cationic dye dyeable filament yarn with no crimp expression was prepared.

Experimental Example 1: Measurement of physical properties of dyeable latent crimp yarn with cationic dye

The following physical properties were measured for each of the cationic dye dyed dyeable latent crimp yarn prepared in Preparation Examples 1 to 10, the latent crimp yarn prepared in Preparation Example 11, and the general cationic dye dyeable filament yarn prepared in Preparation Example 12 It is shown in Table 1 below.

1. Confidence (%)

Elongation was measured using an automatic tensile tester (Textechno) at a speed of 200 cm/min and a gripping distance of 50 cm. Elongation was defined as a value (%) expressed as a percentage of the initial length relative to the elongated length when the fiber was stretched until it was cut by applying a certain force.

2. Leesona shrinkage (%)

A load of 20.5 g was applied to the cationic dye dye latent crimp yarn in a skein state, and after heat treatment in 82 ± 3 ° C. water for 10 minutes, the shrinkage length was calculated as a percentage of the original length.

3. Residual shrinkage (%)

A load of 1.5 g was applied to the cationic dye dye latent crimp yarn in a skein state, and after heat treatment in 82 ± 3 ° C. water for 10 minutes, the shrinkage length was calculated as a percentage of the original length.

Preparation Example 13: Manufacture of Partially Drawn Yarn

Polyethylene terephthalate (PET) yarn was spun at a spinning speed of 3000 mpm to prepare a second mono yarn, and a partially drawn yarn (POY ) was prepared.

Preparation Example 14: Manufacturing of partially drawn yarn

Partially drawn yarn was prepared in the same manner as in Preparation Example 13. However, unlike Preparation Example 13, a partially drawn yarn having a fineness of 50 denier and a filament number of 48 was manufactured by mixing a plurality of second monoyarns.

Preparation Example 15: Manufacture of Partially Drawn Yarn

Partially drawn yarn was prepared in the same manner as in Preparation Example 13. However, unlike Preparation Example 13, a partially drawn yarn having a fineness of 300 denier and a filament number of 48 was prepared by mixing a plurality of second monoyarns.

Preparation Example 16: Manufacture of Partially Drawn Yarn

A polyethylene terephthalate (PET) yarn was spun at a spinning speed of 2400 mpm to prepare a second mono yarn, and a partially stretched yarn (POY ) was prepared.

Preparation Example 17: Manufacture of Partially Drawn Yarn

A polyethylene terephthalate (PET) yarn was spun at a spinning speed of 2700 mpm to prepare a second mono yarn, and a partially drawn yarn (POY ) was prepared.

Preparation Example 18: Manufacture of partially drawn yarn

A polyethylene terephthalate (PET) yarn was spun at a spinning speed of 4500 mpm to prepare a second mono yarn, and a partially drawn yarn (POY ) was prepared.

Experimental Example 2: Measurement of physical properties of partially stretched yarn

The following physical properties were measured for each of the partially drawn yarns prepared in Preparation Examples 13 to 18 and are shown in Table 2 below.

1. Confidence (%)

Elongation was measured using an automatic tensile tester (Textechno) at a speed of 200 cm/min and a gripping distance of 50 cm. Elongation was defined as a value (%) expressed as a percentage of the initial length relative to the elongated length when the fiber was stretched until it was cut by applying a certain force.

Example 1: Manufacture of core-sheath type composite false-twist yarn

A core sheath-type composite false-twist yarn was manufactured using the same manufacturing apparatus as shown in FIG. 3 . Specifically, the cationic dye dyed latent crimped yarn prepared in Preparation Example 1 and the partially drawn yarn prepared in Preparation Example 13 were passed through the 0th feed roller at a yarn speed of 380 mpm at a weight ratio of 1: 1.2, and 3 Intertwined yarns were manufactured by air bridging with an air pressure of 3.0 kg/cm2 with an ATY nozzle with a 45˚ air spraying method in the direction. 3.68%, draw ratio 1.100, yarn speed and twister speed ratio 1.750, θ angle: 110 °, first heater temperature 170 ° C, cooler temperature 25 ° C, combustible temperature 170 ° C, second heater temperature (room temperature, heater OFF) of 25 ° C Through twisting and drawing conditions, a core-sheath type composite false-twist yarn having a fineness of 168.57 denier and a filament number of 72, with the cationic dye dyed latent crimped yarn prepared in Preparation Example 1 as the core and the partially drawn yarn prepared in Preparation Example 13 as the sheath. was manufactured.

Example 2: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the cation dye dye dye latent crimp yarn prepared in Preparation Example 2 was used instead of the cationic dye dye dye latent crimp yarn prepared in Preparation Example 1, and the cationic dye dye dye latent crimp yarn prepared in Preparation Example 2 The crimped yarn and the partially drawn yarn prepared in Preparation Example 13 were used in a weight ratio of 1:0.9 to finally prepare a core sheath-type composite false-twist yarn having a fineness of 195.48 denier and a filament number of 72.

Example 3: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the cation dye dye dye latent crimp yarn prepared in Preparation Example 3 was used instead of the cationic dye dye dye latent crimp yarn prepared in Preparation Example 1, and the cationic dye dye dye latent crimp yarn prepared in Preparation Example 3 The crimped yarn and the partially drawn yarn prepared in Preparation Example 13 were used in a weight ratio of 1:0.25 to finally prepare a core sheath-type composite false-twist yarn having a fineness of 392.21 denier and a filament number of 60.

Example 4: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the cation dye dye dye latent crimp yarn prepared in Preparation Example 4 was used instead of the cationic dye dye dye latent crimp yarn prepared in Preparation Example 1, and the cationic dye dye dye latent crimp yarn prepared in Preparation Example 4 The crimped yarn and the partially drawn yarn prepared in Preparation Example 13 were used in a weight ratio of 1:3 to finally prepare a core sheath-type composite false-twist yarn having a fineness of 127.57 denier and a filament number of 72.

Example 5: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the cation dye dye dye latent crimp yarn prepared in Preparation Example 5 was used instead of the cationic dye dye dye latent crimp yarn prepared in Preparation Example 1, and the cationic dye dye dye latent crimp yarn prepared in Preparation Example 5 The crimped yarn and the partially drawn yarn prepared in Preparation Example 13 were used in a weight ratio of 1:1.5 to finally prepare a core sheath-type composite false-twist yarn having a fineness of 145.57 denier and a filament number of 144.

Example 6: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the cationic dye dyeable latent crimped yarn prepared in Preparation Example 6 was used instead of the cationic dyed dyeable latent crimped yarn prepared in Preparation Example 1, and the draw ratio was set to 1.230, so that the final fineness was 168.57. A core sheath type composite twist yarn having a denier and a filament count of 72 was manufactured.

Example 7: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the cationic dye dyeable latent crimped yarn prepared in Preparation Example 7 was used instead of the cationic dyed dyeable latent crimped yarn prepared in Preparation Example 1, and the final fineness was 164.75 denier and the number of filaments was 72. A core-sheath type composite false-twist yarn was manufactured.

Example 8: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the cationic dye dyeable latent crimped yarn prepared in Preparation Example 8 was used instead of the cationic dyed dyeable latent crimped yarn prepared in Preparation Example 1, and the draw ratio was set to 1.520, so that the final fineness was 160.56. A core sheath type composite twist yarn having a denier and a filament count of 72 was manufactured.

Example 9: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, using the cationic dye dyed latent crimped yarn prepared in Preparation Example 9 instead of the cationic dyed dyed latent crimped yarn prepared in Preparation Example 1, the final fineness was 168.57 denier and the number of filaments was 72. A core-sheath type composite false-twist yarn was manufactured.

Example 10: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the cationic dye dyeable latent crimped yarn prepared in Preparation Example 10 was used instead of the cationic dyed dyeable latent crimped yarn prepared in Preparation Example 1, and the final fineness was 167.24 denier and the number of filaments was 72. A core-sheath type composite false-twist yarn was manufactured.

Example 11: Preparation of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the partially drawn yarn prepared in Preparation Example 14 was used instead of the partially drawn yarn prepared in Preparation Example 13, and the cationic dye dyeable latent crimped yarn prepared in Preparation Example 1 and the prepared yarn prepared in Preparation Example 14 By using the partially drawn yarn in a weight ratio of 1:0.75, a core-sheath type composite false-twist yarn having a fineness of 132.98 denier and a filament number of 72 was finally prepared.

Example 12: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the partially drawn yarn prepared in Preparation Example 15 was used instead of the partially drawn yarn prepared in Preparation Example 13, and the cation dye dyeable latent crimped yarn prepared in Preparation Example 1 and the prepared yarn prepared in Preparation Example 15 The partially drawn yarn was used in a weight ratio of 1:4 to finally manufacture a core-sheath type composite false-twist yarn having a fineness of 377.31 denier and a filament number of 72.

Example 13: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the partially drawn yarn prepared in Preparation Example 16 was used instead of the partially drawn yarn prepared in Preparation Example 13 to finally manufacture a core sheath type composite twist-twist yarn having a fineness of 166.25 denier and a filament number of 72.

Example 14: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the partially drawn yarn prepared in Preparation Example 17 was used instead of the partially drawn yarn prepared in Preparation Example 13 to finally manufacture a core sheath type composite twist-twist yarn having a fineness of 168.57 denier and a filament number of 72.

Example 15: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the partially drawn yarn prepared in Preparation Example 18 was used instead of the partially drawn yarn prepared in Preparation Example 13 to finally manufacture a core sheath type composite twist-twist yarn having a fineness of 167.24 denier and a filament number of 72.

Example 16: Preparation of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, by setting the draw ratio to 1.220 instead of 1.100, a core-sheath type composite false-twist yarn having a fineness of 146.32 denier and the number of filaments of 72 was finally manufactured.

Example 17: Preparation of core-sheath type composite false-twist yarn

The manufacture of the core-sheath type composite false-twist yarn was performed in the same manner as in Example 1, except that, unlike Example 1, the draw ratio was 1.520 instead of 1.100. did not

Example 18: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the 0th overfeed rate was 1.13% instead of the 0th overfeed rate of 1.08%, and finally, a core-sheath type composite false-twist yarn having a fineness of 169.25 denier and a filament number of 72 was manufactured.

Example 19: Preparation of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the twisting temperature was set at 130°C instead of 170°C to finally manufacture a core sheath type composite twisted yarn having a fineness of 168.57 denier and a number of filaments of 72.

Example 20: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, the combustible temperature was set to 230° C. instead of 170° C. to finally manufacture a core-sheath type composite twist-twist yarn having a fineness of 168.57 denier and a filament number of 72.

Comparative Example 1: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, using the latent crimp yarn prepared in Preparation Example 11 instead of the cationic dye dyed latent crimp yarn prepared in Preparation Example 1, the final core-sheath type composite false-twist yarn having a fineness of 166.23 denier and a filament number of 72 was manufactured.

Comparative Example 2: Manufacture of core-sheath type composite false-twist yarn

In the same manner as in Example 1, a core sheath type composite twist yarn was manufactured. However, unlike Example 1, using the general cationic dye dyeable filament yarn prepared in Preparation Example 12 rather than the cationic dye dyeable latent crimped yarn prepared in Preparation Example 1, finally a core sheath with a fineness of 165.34 denier and a filament number of 72 A composite false-twist yarn was prepared.

Comparative Example 3: Manufacture of core-sheath-type composite false-twist yarn

A core sheath-type composite false-twist yarn was manufactured using the same manufacturing apparatus as shown in FIG. 3 . Specifically, the cationic dye dyed latent crimped yarn prepared in Preparation Example 1 and the partially drawn yarn prepared in Preparation Example 13 were passed through the 0th feed roller at a yarn speed of 380 mpm at a weight ratio of 1: 1.2, and 3 A core sheath-type composite false-twist yarn having a fineness of 165 denier and a filament number of 72 was manufactured by air entanglement with an air pressure of 3.0 kg/cm2 using an ATY nozzle of a 45° air injection method in the direction.

Experimental Example 3: Measurement of physical properties of core-sheath type composite false-twist yarn

The following physical properties were measured for each of the core-sheath type composite twist yarns prepared in Examples 1 to 20 and Comparative Examples 1 to 3, and are shown in Tables 3 to 4 below.

1. Robbery and Faith

Strength and elongation were measured using an automatic tensile tester (Textechno) at a speed of 200 cm/min and a gripping distance of 50 cm. Strength and elongation are the value (g/de) obtained by dividing the load applied to the fiber by denier (de) when it is stretched until it is cut by applying a certain force to the fiber, the strength, and the value expressed as a percentage of the initial length relative to the elongated length (%) ) was defined as Shindo.

2. Leesona shrinkage (%)

A load of 20.5 g was applied to the composite false-twist yarn in a skein state, and after heat treatment in water at 82 ± 3 ° C for 10 minutes, the shrinkage length was calculated as a percentage of the original length.

3. Residual shrinkage (%)

A load of 1.5 g was applied to the core-sheath type composite false-twist yarn in a skein state, and after heat treatment in 82 ± 3 ° C water for 10 minutes, the contracted length was calculated as a percentage of the original length.

4. Number of rotations between screening and initial shooting

The number of rotations between the shearing and shearing yarns was measured how many times shearing per unit length (1m) of the sheathing yarn of the composite false-twisted yarn was rotated.

5. Dyeability measurement

A woven fabric sample having a width × length of 10 cm × 10 cm was prepared using each of the core-sheath type composite false twist yarns, and the prepared sample was prepared by mixing basic blue with an acetic acid buffer solution having a dye concentration of 3% (o.w.f) in a bath ratio of 40: 1 pH After raising the temperature from 50 ° C. to 100 ° C. for 30 minutes in a dye bath adjusted to 5, the dye was maintained for 10 minutes. For colorimetry, the color difference was measured using a spectrophotometer (macbeth color eye 3100, usa), and the surface reflectance was measured and the values were synthesized, indicating dyeability (◎ - very good, ○ - excellent, △ - Fair, × - Poor).

6. Soft touch evaluation

Soft touch was evaluated by 10 experts for the woven fabric samples manufactured using the core-sheath type composite twist yarns, and if more than 9 of the experts evaluated that they had a soft touch, ◎, and 6 to 8 experts If it was evaluated as having a soft touch, it was marked as ○, if 3 to 5 experts evaluated as having a soft touch, it was marked as △, and if less than 2 experts evaluated as having a soft touch, it was marked as ×.

7. Workability and fairness evaluation

For each of the core-sheath-type composite false twist yarns, the number of cuts during the 24-hour manufacturing process was measured to evaluate workability and workability (◎ - 0 times, ○ - 1 time, △ - 2 times, × - 3 or more times).

As can be seen in Tables 3 and 4, it was confirmed that the core-sheath type composite false twist yarn prepared in Example 1 had excellent dyeability and soft touch, as well as excellent elasticity and resilience.

Simple modifications or changes of the present invention can be easily performed by those skilled in the art, and all such modifications or changes can be considered to be included in the scope of the present invention.

11: latent winding yarn 12: partial stretching yarn
21: 0th feed roller 22: 1st feed roller
23: second feed roller 24: third feed roller
30: interlace nozzle 41: first heater
42: second heater 50: cooler
60: combustor 70: oiling roller
80: winding roller

Claims (10)

Screening including cationic dye-dyed latent crimp yarns having a plurality of first mono yarns including a first component and a second component and having a side-by-side cross-sectional shape; and
a first-choice yarn including a partially stretched yarn disposed to surround the screening and having a plurality of second mono-yarns; including,
The second component includes a modified polyester copolymerized with a monomer represented by Formula 1 below,
The core-sheath type composite twisted yarn, characterized in that the elongation of the partially drawn yarn is 70 to 200%.
[Formula 1]

In Formula 1, R ₁ and R ₂ are each independently a C ₁ to C ₆ alkyl group.
According to claim 1,
The core-sheath type composite false-twist yarn, characterized in that the modified polyester is copolymerized by containing 0.8 to 2.0% by weight of the monomer represented by Formula 1.
According to claim 1,
The cation dye dye latent crimping yarn
A core-sheath type composite false-twist yarn characterized in that the fineness is 35 to 280 denier and the number of filaments is 12 to 96.
According to claim 1,
The cation dye dye latent crimping yarn
A core sheath type composite twist yarn characterized by elongation of 15 to 50%, lithona shrinkage of 5 to 25%, and residual shrinkage of 15 to 65%.
According to claim 1,
The partly drawn yarn has a fineness of 30 to 300 denier and a number of filaments of 12 to 144.
According to claim 1,
The cation dye latent crimp yarn has an average crimp number of 5.0 to 20.0 / CM and a micro crimp of 10 cycles / cm or less.
According to claim 1,
The composite false-twist yarn is a core-sheath type composite false-twist yarn, characterized in that the weight ratio of the screening and the first yarn is 1: 0.15 to 3.0.
According to claim 1,
The core-sheath type composite twist yarn, characterized in that the difference in elongation of the cation dye dyeable latent crimp yarn and the partially drawn yarn is 20 to 185%.
According to claim 1,
The composite twist yarn is a core-sheath type composite twist yarn, characterized in that it satisfies the following conditions (1) to (6).
(1) Fineness: 80 to 500 denier
(2) Number of filaments: 24 ~ 288
(3) Confidence: 15 ~ 50%
(4) Lisona shrinkage rate: 5 ~ 25%
(5) Residual shrinkage: 15 ~ 65%
(6) Number of revolutions between screening and first sanding: 80 ~ 120 times/m
Cationic dyed latent crimp yarns including a first component and a second component and having a plurality of first mono yarns having a side-by-side cross-sectional shape, and partially drawn yarns having a plurality of second mono yarns The first stage of preparation;
a second step of air interlacing the latent crimped yarn and partially stretched yarn to produce interlaced yarn; and
A third step of false twisting and drawing the interwoven yarn to produce a core sheath type composite twist yarn; including,
The second component includes a modified polyester copolymerized with a monomer represented by Formula 1 below,
The method for producing core-sheath composite false-twist yarn, characterized in that the elongation of the partially drawn yarn is 70 to 200%.
[Formula 1]

In Formula 1, R ₁ and R ₂ are each independently a C ₁ to C ₆ alkyl group.

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