JP7316444B2 - Core-sheath type composite false-twisted yarn and method for producing the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a core-sheath type composite false twisted yarn and a method for producing the same, and more particularly, to a core-sheath type composite false twisted yarn having excellent lightness, heat retention, dyeability and touch feeling, as well as excellent stretchability. The present invention relates to a twisted yarn and its manufacturing method.

Synthetic fibers have a shorter history than natural fibers, but with repeated technological developments, some properties have reached levels comparable to those of natural fibers. In the clothing industry, the convenience of clothing is being emphasized day by day. Factors that enhance this convenience include stretchability, light weight, sweat absorption and quick drying in summer, and heat retention in winter.

Functional fibers with such elements have been continuously developed. Examples include spandex using polyurethane, latent crimped yarn using viscosity difference of polyester, sweat absorption speed of cross section There are dry fibers and hollow fibers.

Recently, in the clothing field, the market for spandex, which is characterized by elasticity, has been steadily growing as the demand for materials for fabrics requiring elasticity and differentiated textures different from conventional textures has increased. However, in the case of spandex, there is a problem in shape stability, etc., so there is a disadvantage that the spandex yarn cannot be used alone and a separate covering process is required. Therefore, there is no choice but to use relatively thick fabrics, and there is a limit to the market demand for thinner and thinner fabrics. I had a problem that I couldn't do it.

Therefore, there is an urgent need to develop a fiber that is lightweight, heat-retaining, dyeable, and touchable, and has excellent stretchability.

The present invention has been made to solve the above problems, and is an excellent core-sheath type by comprehensively judging lightness, heat retention, dyeability , touch feeling , and elasticity. It is an object to provide a composite false twisted yarn and a method for producing the same.

In order to solve the above-mentioned problems, the core-sheath type composite false twisted yarn of the present invention includes a plurality of first single yarns having a side-by-side cross-sectional shape and including a first component and a second component. A core yarn including a thread, and a sheath yarn including a partially drawn yarn having a plurality of cationic dye-dyeable polyester second single yarns disposed so as to surround the core yarn. At this time, the first component and the second component may have different intrinsic viscosities.

According to a preferred embodiment of the present invention, the cationic dyeable polyester second single yarn may be a raw yarn obtained by copolymerizing 1 to 10 mol % of the first compound with polyester.

According to one preferred embodiment of the present invention, the polyester may include one or more selected from PET (polyethylene terephthalate), PBT (polybutylene terephthalate) and wholly aromatic polyester.

According to one preferred embodiment of the present invention, the first compound may comprise dimethyl 5-sulfoisophthalate metal salt. At this time, the metal salt may contain one or more selected from sodium, potassium and lithium.

According to one preferred embodiment of the present invention, the first single yarn may have a difference in intrinsic viscosity (IV) between the first component and the second component of 0.15-0.95 dl/g.

According to a preferred embodiment of the present invention, the first component and the second component may have a difference in thermal shrinkage at 100° C. of 5% or more.

According to one preferred embodiment of the present invention, the fineness of the first single yarn may be between 1 and 8 denier.

According to one preferred embodiment of the present invention, the cationic dyeable polyester second single yarn may have a fineness of 1-8 denier.

According to a preferred embodiment of the present invention, the partially drawn yarn may have a fineness of 20-140 denier.

In addition, the method for producing a core-sheath type composite false twisted yarn of the present invention comprises a plurality of first single yarns having a side-by-side cross-sectional shape containing a first component and a second component; a first step of preparing a partially drawn yarn comprising a second cationic dyeable polyester single yarn; and a second step of air-entangling the latently crimped yarn and the partially drawn yarn to produce an entangled yarn. and a third step of false twisting and drawing the entangled yarn to produce a core-sheath composite false twisted yarn. At this time, the cationic dye-dyeable polyester second single yarn is a raw yarn obtained by copolymerizing 1 to 10 mol % of the first compound with polyester, and the polyester is PET (polyethylene terephthalate), PBT ( polybutylene terephthalate) and wholly aromatic polyester, the first compound includes dimethyl 5-sulfoisophthalate metal salt, and the metal salt is sodium , potassium and lithium. At this time, the first component and the second component may have different intrinsic viscosities.

According to a preferred embodiment of the present invention, the second stage of air entangling can be performed at an air pressure of 2-10 kg/cm ² .

The term 0th overfeed rate used in the present invention means "(speed of 0th feed roller - speed of 1st feed roller)/speed of 0th feed roller", and 2nd overfeed rate means "(speed of the second feed roller - speed of the third feed roller)/speed of the second feed roller", and the third overfeed rate is "(speed of the third feed roller - speed of the take-up roller speed)/speed of the third feed roller”.

The core-sheath type composite false twisted yarn of the present invention and its manufacturing method are excellent in light weight, heat retention, dyeability and touch feeling, and at the same time, they are also excellent in stretchability.

1 is a sectional view showing a core-sheath type composite false twisted yarn according to a preferred embodiment of the present invention; FIG. FIG. 2 is a schematic diagram showing a process of manufacturing a core-sheath type composite false twisted yarn according to a preferred embodiment of the present invention;

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement 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 unrelated to the description are omitted, and the same or similar components are given the same reference numerals throughout the specification.

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

First, the core 110 of the present invention may include a latently crimped yarn comprising a plurality of first single yarns. At this time, the latently crimped yarn can perform functions of improving stretchability and resilience.

The first single yarn can be manufactured by composite spinning the first component and the second component.

In addition, the first single yarn may contain a first component and a second component, preferably the first component and the second component having different intrinsic viscosities, and may have a side-by-side cross-sectional shape. .

At this time, the difference in intrinsic viscosity (IV) between the first component and the second component is 0.1 to 0.95 dl/g, preferably 0.1 to 0.3 dl/g, more preferably 0.15 It may be up to 0.25 dl/g, and if the difference in intrinsic viscosity is out of the range described above, the fluidity increases and the crimpability decreases, resulting in the core-sheath type composite false twisted yarn of the present invention. There may be a problem that the elasticity of the product is reduced.

The first component and the second component may each independently contain a polyester, and the polyester is one or more selected from polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polytrimethylene terephthalate. may include

The first component has an intrinsic viscosity (IV) of 0.6 to 1.4 dl/g, preferably 0.65 to 0.75 dl/g, more preferably 0.67 to 0.73 dl/g. The second component may have an intrinsic viscosity (IV) of 0.45-0.55 dl/g, preferably 0.48-0.52 dl/g.

In addition, the first component and the second component may have a difference in thermal shrinkage rate at 100° C. of 5% or more, preferably 10 to 20%, more preferably 10 to 15%. A polyester with a heat shrinkage of 11-20% at 100° C. and a polyester with a heat shrinkage of 1-10% at 100° C. may be conjugate spun. If the difference in thermal shrinkage rate at 100° C. between the first component and the second component is less than 5%, the crimp property may be insufficient and the stretchability may be reduced.

The first single yarn of the present invention may have a fineness of 1 to 8 denier, preferably 3 to 5 denier. , 8 denier, the air entangling during the manufacturing process of the core-sheath type composite false twisted yarn of the present invention is not easy, so that the stretchability may be deteriorated.

The latently crimped yarn of the present invention contains 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. However, if the weight ratio is less than 1:0.5, stretchability and dyeability may be deteriorated, and if the weight ratio exceeds 1:1.5, the touch feeling may be deteriorated.

Further, the latently crimped yarn of the present invention may have a fineness of 30 to 200 denier, preferably 50 to 150 denier, more preferably 60 to 100 denier. There can be problems with degrading and above 200 denier there can be problems with not being easy to air entangle.

The latently crimped yarn of the present invention may have an elongation rate of 15 to 35%, preferably 20 to 30%, and an elongation recovery rate of 90 to 97%, preferably 93 to 97%. may

The sheath 120 of the present invention may then comprise a partially oriented yarn comprising a plurality of cationic dye-dyeable polyester secondary single yarns. At this time, the partially drawn yarn can perform the function of improving the dyed appearance and touch feeling.

The cationic dye-dyeable polyester second single yarn of the present invention is obtained by copolymerizing 1 to 10 mol%, preferably 1 to 5 mol%, more preferably 1 to 2 mol% of the first compound with polyester. It may be raw yarn.

At this time, the polyester may include one or more selected from PET (polyethylene terephthalate), PBT (polybutylene terephthalate) and wholly aromatic polyester, preferably PET (polyethylene terephthalate).

In addition, the first compound is a substance exhibiting cationic dye-dyeability, and may be included without limitation as long as it is a substance exhibiting cationic dye-dyeability, preferably 5-sulfoisophthalic acid dimethyl metal salt ( dimethyl 5-sulfoisophthalate metal salt), where the metal salt contains one or more selected from sodium, potassium and lithium, more preferably 5-sulfoisophthalic acid dimethylsodium salt (DMS , Dimethyl 5-sodiosulfo Isophthalate sodium salt).

The cationic dye-dyeable polyester second single yarn of the present invention may have a fineness of 1 to 8 denier, preferably 3 to 5 denier. There may be a problem that the processability is deteriorated, and if it exceeds 8 denier, there may be a problem that the touch feeling is deteriorated.

The partially drawn yarn of the present invention may have a fineness of 20 to 140 denier, preferably 50 to 125 denier. Possibly, exceeding 140 denier may have a problem of degraded touch feeling.

In addition, the core part 110 and the sheath part 120 of the core-sheath type composite false twisted yarn 100 of the present invention may have a weight ratio of 1:1 to 3, preferably 1:1.2 to 2.3. If the weight ratio is less than 1:1, the dyeability and touch feeling may be deteriorated, and if it exceeds 1:3, the dyeability may be deteriorated.

The core-sheath type composite false twisted yarn of the present invention may have a fineness of 50 to 340 denier, preferably 100 to 275 denier, more preferably 110 to 225 denier. There may be a problem of loss of properties, and above 340 denier, there may be a problem of reduced touch feeling.

The method for producing a core-sheath type composite false twisted yarn of the present invention includes first to third steps, and will be described with reference to the schematic diagram of the process for producing a core-sheath type composite false twisted yarn in FIG. It is as follows.

First, the first step of the method for producing a core-sheath type composite false twisted yarn of the present invention is a latent crimp comprising a plurality of first single yarns having a side-by-side cross-sectional shape containing a first component and a second component. A yarn 11 and a partially oriented yarn 12 comprising a plurality of cationic dyeable polyester second single yarns can be provided. At this time, the first component and the second component may have different intrinsic viscosities.

The latently crimped yarn 11 of the first stage can be manufactured by composite spinning the first component and the second component, and the conditions for composite spinning are not limited as long as they are conditions that are commonly used in the art. Preferably, it can be produced by conjugate spinning under the conditions of a conjugate spinning angle of 45 to 90°, a discharge pressure of 150 to 200 kg/cm ² , and a spinning speed of 2,900 to 6,000 mpm (m/min). .

In addition, the first stage partially drawn yarn 12 is a raw yarn obtained by copolymerizing polyester with 1 to 10 mol%, preferably 1 to 5 mol%, more preferably 1 to 2 mol% of the first compound. It can be produced by spinning, and the spinning conditions can be used without limitation as long as they are conditions that are commonly used in the art, preferably at a spinning speed of 2,500 to 3,500 mpm (m / min) can be produced by spinning under the conditions of

Next, in the second step of the method for producing a core-sheath type composite false twisted yarn of the present invention, the entangled yarn can be produced by air-entangling the latently crimped yarn and the partially drawn yarn prepared in the first step.

Specifically, in the second step, the entangled yarn can be manufactured by passing the latently crimped yarn 11 and the partially drawn yarn 12 through the 0th feed roller 21 and air-entangling them through the interlace nozzle 30 .

At this time, the latently crimped yarn 11 and the partially drawn yarn 12 can be passed through the 0th feed roller 21, and the air entanglement conditions can be used without limitation as long as they are conditions that are commonly used in the technical field. , preferably at an air pressure of 0.5 to 20 kg/cm ² , more preferably at an air pressure of 2 to 10 kg/cm ² . If the air pressure is less than 0.5 kg/cm ² , the mixed fibers may not be well mixed, and the dyeing uniformity and touch feeling may be deteriorated ^. The touch feeling may decrease.

At this time, the 0th overfeed rate (OF0), which indicates the speed ratio between the 0th feed roller 21 and the 1st feed roller 22 described later, is 0.5 to 30%, preferably 1 to 25%. may

In addition, the interlace nozzle may be any interlace nozzle that is commonly used in the art without limitation, and preferably, the ATY nozzle of 45° air injection from three directions can be used.

Next, in the third step of the manufacturing method of the core-sheath type composite false twisted yarn of the present invention, the entangled yarn manufactured in the first step can be false twisted and drawn to manufacture the core-sheath type composite false twisted yarn.

Specifically, in the third step, the entangled yarn manufactured through the second step is supplied to the first feed roller 22 and passed through the first heater 41, the cooler 50, the false twister 60 and the second feed roller 23. After being false twisted and drawn, the yarn is passed through the second heater 42 and the third feed roller 24 to produce a core-sheath type composite false twisted yarn.

At this time, the temperature of the first heater 41 may be 130 to 210.degree. C., preferably 140 to 200.degree.

In addition, the entangled yarn that has passed through the first heater 41 passes through a cooler 50. In this case, the temperature of the cooler 50 may be 10 to 40°C, preferably 15 to 35°C. There may be. The entangled yarn that has passed through the first heater 41 passes through the cooler 50 to lower its temperature, and then passes through the false twister 60 to undergo twisting and untwisting. At this time, the false twisting can be carried out at a temperature of 130 to 230.degree. C., preferably 150 to 210.degree. If the false-twisting temperature is out of the above range, it may be difficult to exhibit excellent effects in terms of dyeability, touch feeling and stretchability.

Further, the entangled yarn that has passed through the false twister 60 passes through the second feed roller 23 . Stretching occurs due to the difference in linear velocity between the first feed roller 22 and the second feed roller 23, and the entangled yarn is fed to the first heater installed between the first feed roller 22 and the second feed roller 23. 41, drawing and false twisting are possible at the same time.

The draw ratio is defined as the speed of the second feed roller/the speed of the first feed roller, and the draw ratio may be 1 to 1.5, preferably 1.1 to 1.4. There may be. If the draw ratio is less than 1, the tension becomes low, which may cause unevenness in the manufactured core-sheath type composite false twisted yarn. There may be a problem that the thread breaks inside.

After passing through the false twister 60, the entangled yarn passes through the second feed roller 23 and then the third feed roller 24, between which the second heater 42 is installed. The temperature of the second heater 42 may be 130-210.degree. C., preferably 140-200.degree.

The entangled yarn that has passed through the third feed roller 24 is oiled by passing through an oiling roller 70, and then wound around a winding roller 80 to produce a core-sheath type composite false-twisted yarn. can do.

The second overfeed rate (OF2), which indicates the ratio between the speeds of the second feed roller 23 and the third feed roller 24, may be 0.5-6%, preferably 1-5. 0.5%. If the second overfeed rate is less than 0.5%, the mixed fibers may be entangled unevenly or it may not be easy to develop the desired level of touch feeling. The general tension balance may be disturbed, causing DTY workability problems.

In addition, the method for producing a core-sheath type composite false twisted yarn according to an embodiment of the present invention further includes a fourth step of winding the core-sheath type composite false twisted yarn that has passed through the third feed roller onto a winding roller after the third step. may contain.

At this time, the third overfeed rate (OF3), which indicates the ratio between the speeds of the third feed roller 24 and the take-up roller 80, may be 1-8%, preferably 1.5. It may be up to 7.5%. If the third overfeed rate is less than 1%, the tension is too high, which may cause problems such as damage to the textured yarn and poor workability. defects may occur.

In addition, the speed of each feed roller can be appropriately changed within a range that satisfies the range of the overfeed rate.

The present invention may also include woven fabrics and/or knitted fabrics containing the core-sheath composite false-twisted yarn of the present invention.

In addition, by producing a woven fabric and/or a knitted fabric containing the core-sheath type composite false twisted yarn of the present invention, it is possible to exhibit remarkably excellent effects in terms of lightness, heat retention, dyeability and touch feeling.

It may also include a woven fabric produced by plain weaving by supplying untwisted yarns as warp yarns and weft yarns containing the core-sheath type composite false twisted yarn of the present invention.

Although the embodiment of the present invention has been described above, it is merely an example and does not limit the embodiment of the present invention. Then, it can be understood that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the present invention. For example, each component specifically shown in the embodiment of the present invention can be modified and implemented. All such variations and differences in application are to be considered within the scope of the invention as defined in the appended claims.

[Example 1: Production of fabric containing core-sheath type composite false-twisted yarn]
(1) A polyester having an intrinsic viscosity (IV) of 0.67 dl/g as the first component and a polyester having an intrinsic viscosity (IV) of 0.52 dl/g as the second component at a weight ratio of 1:1 at 80° Composite spinning at a composite spinning angle, a discharge pressure of 160 kg/cm ² , a spinning speed of 4900 mpm, a fineness of 3.3 denier, and a difference in thermal shrinkage of the first component and the second component at 100 ° C. of 11 % and has a side-by-side cross-sectional shape, and a plurality of the first single yarns are provided, the fineness is 80 denier, the elongation rate is 25%, and the elongation recovery rate is 96 % latently crimped yarn was produced.

(2) Spinning a raw yarn obtained by copolymerizing polyethylene terephthalate (PET) with 1.5 mol% of dimethyl 5-sodiosulfo isophthalate sodium salt (DMS) at a spinning speed of 3000 mpm, A portion having a fineness of 123 denier by producing a cationic dyeable polyester second single yarn having a fineness of 3.4 denier, and comprising a plurality of the cationic dyeable polyester second single yarns having a fineness of 3.4 denier. A drawn yarn (POY) was produced.

(3) A core-sheath type composite false-twisted yarn was manufactured using the same manufacturing apparatus as in FIG. Specifically, the produced latently crimped yarn and the produced partially drawn yarn were adjusted to a weight ratio of 1:1.54, passed through the 0th feed roller, and interlaced nozzles were used to spray 45° air from 3 directions. An entangled yarn is produced by air entangling with a nozzle at an air pressure of 3 kg/cm ² , and the entangled yarn has a 0th overfeed rate of 1.08%, a 2nd overfeed rate of 3.49%, and a 3rd overfeed rate of 3.68. %, draw ratio 1.110, yarn speed to twister speed ratio 1.470, θ angle: 105°, first heater temperature 160°C, cooler temperature 25°C, second heater temperature 150°C , a core-sheath type composite false-twisted yarn having a fineness of 205 denier was produced.

(4) The manufactured core-sheath type composite false-twisted yarn was supplied as untwisted yarn as warp and weft, and woven by plain weaving, followed by cationic dyeing to produce a woven fabric.

[Example 2: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using a first single yarn having a fineness of 0.3 denier.

[Example 3: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using a first single yarn having a fineness of 1.6 denier.

[Example 4: Production of fabric containing core-sheath type composite false twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using a first single yarn having a fineness of 6.0 denier.

[Example 5: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using a first single yarn having a fineness of 10.0 denier.

[Example 6: Production of woven fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using a second single yarn having a fineness of 0.3 denier.

[Example 7: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using a second single yarn having a fineness of 1.0 denier.

[Example 8: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using a second single yarn having a fineness of 6.0 denier.

[Example 9: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using a second single yarn having a fineness of 10.0 denier.

[Example 10: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using partially drawn yarn having a fineness of 10 denier.

[Example 11: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using partially drawn yarn having a fineness of 40 denier.

[Example 12: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using partially drawn yarn having a fineness of 130 denier.

[Example 13: Production of fabric containing core-sheath type composite false twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, a woven fabric containing core-sheath type composite false-twisted yarn was produced using partially drawn yarn with a fineness of 170 denier.

[Example 14: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, the woven fabric containing the core-sheath type composite false twisted yarn was produced by air entangling under an air pressure of 0.3 kg/cm ² .

[Example 15: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, the woven fabric containing the core-sheath type composite false twisted yarn was produced by air entangling at an air pressure of 1.0 kg/cm ² .

[Example 16: Production of fabric containing core-sheath type composite false twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, the woven fabric containing core-sheath type composite false twisted yarn was produced by air entanglement under an air pressure of 18 kg/cm ² .

[Example 17: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, the woven fabric containing the core-sheath type composite false twisted yarn was produced by air entangling under an air pressure of 25 kg/cm ² .

[Example 18: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, non-twisted core-sheath type composite false-twisted yarns were supplied as warp yarns, twisted at 1200 T/M and supplied as weft yarns, and woven in plain weave, followed by cationic dyeing to produce fabrics. bottom.

[Comparative Example 1: Production of fabric containing core-sheath type composite false-twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, the partially oriented yarn was obtained by spinning polyethylene terephthalate (PET) at a spinning speed of 3000 mpm to produce a second single yarn having a fineness of 3.4 denier, A partially oriented yarn (POY) having a fineness of 123 denier and having a plurality of second single yarns was used to produce a woven fabric containing a core-sheath type composite false twisted yarn.

[Comparative Example 2: Production of fabric containing core-sheath type composite false twisted yarn]
A woven fabric containing core-sheath type composite false twisted yarn was produced in the same manner as in Example 1. However, unlike Example 1, polyethylene terephthalate (PET) was conjugate-spun at a discharge pressure of 150 kg/cm ² and a spinning speed of 4500 mpm, and a second fiber having a fineness of 3.3 denier and a circular cross-sectional shape was obtained. One single yarn was manufactured, and a plurality of the manufactured first single yarns were provided to manufacture SDY (spin draw yarn) having a fineness of 80 denier and an elongation of 30%.

In addition, the partially drawn yarn is obtained by spinning polyethylene terephthalate (PET) at a spinning speed of 3000 mpm to produce a second single yarn having a fineness of 3.4 denier, and a plurality of second single yarns having a denier produced as described above. Using partially oriented yarn (POY) with a fineness of 123 denier, a woven fabric containing core-sheath type composite false twisted yarn was produced.

[Experimental example 1]
The following physical properties of the woven fabrics prepared in Examples 1-18 and Comparative Examples 1-2 were measured and shown in Tables 1-4 below.

1. Evaluation of lightness Forty panelists evaluated the lightness of each of the woven fabrics produced in Examples 1 to 18 and Comparative Examples 1 and 2, and the average score evaluated by each panelist was set to 0 to 10 points. 8 points or more: Excellent, 6-7 points: Good, 4-5 points: Fair, 2-3 points: Slightly unsatisfactory, Less than 2 points: Inadequate and light evaluated the sex.

2. Evaluation of Heat Retention The fabrics produced in Examples 1 to 18 and Comparative Examples 1 and 2 were each evaluated for heat retention by 40 panelists, and the average score evaluated by each panelist was set to 0 to 10 points. 8 points or more: excellent, 6 to 7 points: good, 4 to 5 points: normal, 2 to 3 points: somewhat insufficient, less than 2 points: insufficient evaluated the sex.

3. Evaluation of Dyed Appearance The dyed appearance was evaluated by 40 panelists for each of the fabrics produced in Examples 1 to 18 and Comparative Examples 1 and 2, and the average score evaluated by each panelist was set to 0 to 10 points. 8 points or more: excellent, 6 to 7 points: good, 4 to 5 points: normal, 2 to 3 points: slightly insufficient, less than 2 points: insufficient Appearance was evaluated.

4. Evaluation of touch feeling The touch feeling was evaluated by 40 panelists for each of the fabrics produced in Examples 1 to 18 and Comparative Examples 1 and 2, and the average score evaluated by each panelist was set to 0 to 10 points. 8 points or more: Excellent, 6-7 points: Good, 4-5 points: Fair, 2-3 points: Slightly unsatisfactory, Less than 2 points: Inadequate touch evaluated the feeling.

5. Evaluation of stretchability The stretchability was evaluated by 40 panelists for each of the woven fabrics produced in Examples 1 to 18 and Comparative Examples 1 and 2, and the average score evaluated by each panelist was set to 0 to 10 points. 8 points or more: excellent, 6 to 7 points: good, 4 to 5 points: normal, 2 to 3 points: somewhat insufficient, less than 2 points: insufficient evaluated the sex.

Referring to Table 1 above, the woven fabrics produced according to Examples 1, 3 and 4 all combined lightness, heat retention, dyed appearance, touch and stretchability than the woven fabrics produced according to Examples 2 and 5. I was able to confirm that it was excellent by judging it objectively.

Referring to Table 2 above, the fabrics produced according to Examples 1, 7 and 8 all combined lightness, heat retention, dyed appearance, touch and stretchability than the fabrics produced according to Examples 6 and 9. I was able to confirm that it was excellent by judging it objectively.

Referring to Tables 2 and 3 above, the fabrics produced according to Examples 1, 11 and 12 were lighter, warmer, dyed in appearance, touch and stretchable than the fabrics produced according to Examples 10 and 13. I was able to confirm that it was excellent by judging all of them in a composite manner.

Referring to Tables 3 and 4 above, the fabrics produced according to Examples 1, 15 and 16 were lighter, warmer, dyed appearance, touch and stretchable than the fabrics produced according to Examples 14 and 17. I was able to confirm that it was excellent by judging all of them in a composite manner.

In addition, it was confirmed that the woven fabric manufactured according to Example 1 was superior to the woven fabric manufactured according to Example 18 in terms of lightness, heat retention, dyeing appearance, touch feeling, and stretchability. did it.

In addition, the woven fabric manufactured according to Example 1 was significantly superior to the woven fabric manufactured according to Comparative Examples 1 and 2 in terms of lightness, heat retention, dyeing appearance, touch feeling, and stretchability. I was able to confirm that

Simple variations and modifications of the present invention can be readily implemented by those of ordinary skill in the art, and all such variations and modifications are intended to be within the scope of the present invention. .

The present invention relates to a core-sheath type composite false twisted yarn and a method for producing the same, and more particularly, to a core-sheath type composite false twisted yarn which is superior in terms of lightness, heat retention, dyeability , touch feeling , and stretchability. The present invention relates to a false twisted yarn and a method for producing the same.

Claims (4)

a core yarn comprising a latently crimped yarn comprising a plurality of first single yarns having a side-by-side cross-sectional shape and comprising a first component and a second component;
a sheath yarn including a partially drawn yarn arranged to surround the core yarn and comprising a plurality of cationic dyeable polyester second single yarns ,
The cationic dyeable polyester second single yarn is a raw yarn obtained by copolymerizing polyethylene terephthalate with 1 to 10 mol% of the first compound,
The first compound comprises 5-sulfoisophthalic acid dimethyl metal salt,
The metal salt contains one or more selected from sodium, potassium, and lithium,
The first component and the second component are polyethylene terephthalate, and the difference in thermal shrinkage at 100° C. is 5% or more,
The first single yarn has a fineness of 1 to 8 denier,
The cationic dye-dyeable polyester second single yarn has a fineness of 1 to 8 denier,
The core-sheath type composite false twisted yarn, wherein the partially drawn yarn has a fineness of 20 to 140 denier . The core-sheath type composite false twisted yarn according to claim 1, wherein the latently crimped yarn has an elongation rate of 15 to 35% and an elongation recovery rate of 90 to 97%. Latent crimped yarn comprising a first component and a second component and comprising a plurality of first single yarns having a side-by-side cross-sectional shape, and a portion comprising a plurality of cationic dyeable polyester second single yarns A first step of preparing a drawn yarn,
The cationic dyeable polyester second single yarn is a raw yarn obtained by copolymerizing polyethylene terephthalate with 1 to 10 mol% of the first compound,
The first compound comprises 5-sulfoisophthalic acid dimethyl metal salt,
The metal salt contains one or more selected from sodium, potassium, and lithium,
The first component and the second component are polyethylene terephthalate, and the difference in thermal shrinkage at 100° C. is 5% or more,
The first single yarn has a fineness of 1 to 8 denier,
The cationic dye-dyeable polyester second single yarn has a fineness of 1 to 8 denier,
a first step, wherein the partially drawn yarn has a fineness of 20 to 140 denier;
a second step of air-entangling the latently crimped yarn and the partially drawn yarn to produce an entangled yarn;
and a third step of false twisting and drawing the entangled yarn to produce a core-sheath type composite false twisted yarn. 4. The method for producing a core-sheath type composite false twisted yarn according to claim 3, wherein the air entangling in the second stage is performed at an air pressure of 2 to 10 kg/cm ² .

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