KR102415021B1 - PET composite yarn having a melange tone effect and manufacturing method thereof - Google Patents

Abstract

The present invention is a PET polymer resin having an intrinsic viscosity (IV) of 0.60 to 0.65 by differentiating the spinning temperature, spinning speed, elongation and fineness, and the number of filaments during melt spinning to control physical properties such as fiber orientation and crystallinity, 2 It relates to a PET composite false twist yarn having excellent expression of melangiton having a linear shape of three or more colors and excellent crimpability and a method for manufacturing the same.

Description

PET composite yarn having a melange tone effect and manufacturing method thereof }

The present invention relates to a PET composite false-twisted yarn having excellent expression of melangiton having a linear shape of 2 to 3 colors or more by twisting and hot stretching a large fineness high elongation multifilament yarn and a fine fineness low elongation multifilament yarn, respectively, and then entangling them during braiding. It relates to a manufacturing method.

Fashionability and functionality are considered the most important among the rapidly changing psychology of clothing consumers. In particular, in the case of clothing used in the professional leisure field such as mountaineering clothing, golf wear, and ski clothing, there is a demand for fashionableness that satisfies various designs along with functions such as thermal insulation, light weight, sweat absorption, quick drying, heat generation, and stretching. In order to respond to these consumer demands, the development of materials that can express various fashionableness is recently emphasized, and in particular, melange material having a dichroic property is a representative fashion material that is continuously being developed.

The melange effect is an effect expressed by mixing fibers with different dyeing properties to produce yarn or weaving different materials, and refers to an effect that gives a feeling of mixing similar colors rather than a single color.

The conventional melange material is mainly manufactured by spinning short fibers of different colors by yarn dyeing, or by yarn processing and compounding different types of fibers, or by combining different materials by interweaving in the weaving step and the like. Recently, a number of technologies have been developed to express a heterochromatic effect in the filament itself through complex spinning of heterogeneous polymers.

Looking at the prior art for such a melange material, in Korean Patent No. 10-0860266 (September 25, 2008), the ratio of 30 to 70% by weight of polyester original microfiber and 70 to 30% by weight of nylon or polyester general microfiber A composite twisted or interlaced yarn with warp yarn, weft yarn, warp yarn and weft yarn is used as warp yarn, weft yarn or warp yarn and weft yarn to weave or knit, and salt processing to provide an ultra-fine fiber fabric with excellent melange-type appearance is disclosed, and Republic of Korea Patent No. 10-0635857 (2006. In 10. 18.), two or more composite false twisted yarns composed of two or more fiber-forming components with different dyeing properties, or two or more different fiber-forming components having different dyeing characteristics. A two-component composite false twisted yarn (super yarn) has a form in which a thermoplastic multifilament (core yarn) is wound, and a bi-shrinking mixed yarn (ATY) having excellent melange effect is disclosed.

However, the melange materials as described above have problems in that it is difficult to express various colors by using a raw yarn, and ATY spots appear as defects on the fabric. In addition, due to the existence of differences in the thermal properties and physical properties of the fibers for producing the melange material, the yarn processing conditions were very difficult. In particular, the main material for expressing melangitone is a non-uniform cross-sectional yarn, cation dyeable PET, or undyed yarn, and these yarns are expensive yarns to manufacture. Therefore, two or more of these high-priced yarns are used as a base material and the melange material is manufactured by weaving or knitting after compositing them, thereby increasing the production cost.

The present invention is a PET polymer resin having an intrinsic viscosity (IV) of 0.60 to 0.65 by differentiating the spinning temperature, spinning speed, elongation and fineness, and the number of filaments during melt spinning to control physical properties such as fiber orientation and crystallinity. It is a technical task to provide a PET composite false twist yarn having excellent expression of melangitone having a linear shape of three or more colors and excellent crimping properties, and a method for manufacturing the same.

The manufacturing method of the PET composite false-twisted yarn 100 capable of expressing a different color tone according to the present invention includes: a first step (S100) of melt-spinning a multifilament yarn 10 with high fineness and high elongation; a second step (S200) of melt-spinning the fine-fine, low-elongation multifilament yarn (20); a third step (S300) of false-twisting and hot-drawing the thin-fine high-stretch multifilament yarn (10); a fourth step (S400) of falsely twisting and hot stretching the fineness low elongation multifilament yarn (20); The high-fineness high-elongation multifilament yarn 10 falsely twisted and hot drawn in the third step (S300) and the fine-fineness low elongation multifilament yarn 20 falsely twisted and hot drawn in the fourth step (S400) are air entangled. a fifth step of braiding (S500); and a sixth step (S600) of heat-treating the high-fineness high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20 braided in the fifth step (S500) (S600); The multifilament yarn 10 and the fineness low elongation multifilament yarn 20 are polyethylene terephthalate, and the spinning speed of the large fineness high elongation multifilament yarn 10 is 2,200 to 2,800 m/min, and the fineness is low The spinning speed of the elongated multifilament yarn 20 is preferably 3,800 to 4,400 m/min.

In addition, the difference in the number of filaments between the high-fineness high-elongation multifilament yarn 10 and the fine-fineness low elongation multifilament yarn 20 during braiding in the fifth step is 24-84, and the difference in elongation is 100-200% and the difference in total fineness is preferably 300 to 400 denier, and the draw ratio of the high fineness and high elongation multifilament yarn 10 is 1.8 to 2.5. The draw ratio of the fine fineness low elongation multifilament yarn 20 is 1.1 to 1.5, and the color difference (ΔE) after dyeing of the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 is 2.0 or more It is particularly preferred.

The manufacturing method of the PET composite false twisted yarn 100 capable of expressing a different color tone according to the present invention is dyeing by controlling the orientation and crystallinity of the fiber in the spinning process and the threading process when manufacturing the fiber using the same PET polymer. After natural color tones are expressed, the inherent crimping properties of yarn processing are given, which has the effect of expressing a sensibility that is differentiated from conventional materials. In particular, by manufacturing the PET composite false-twisted yarn 100 using the same type of fiber having a difference in fineness and elongation, delicate and natural color tones are expressed due to the difference in dyeability, melange tone and touch feeling without an increase in manufacturing cost This has the effect of being able to manufacture the expressed fabric.

1 is a process diagram for manufacturing a composite false-twisted yarn 100 having excellent expression of different color tones according to the present invention;
2 is a schematic diagram of a melt spinning apparatus 300 according to the present invention,
3 is a schematic diagram of a false twisting device 500 according to the present invention,
4 is a schematic diagram of an air bridging device 200 according to the present invention,
5 is a photograph of a side (a) and a cross-section (b) of the composite false-twisted yarn 100 having excellent expression of different color tones prepared according to the present invention;
6 is a photograph after dyeing of the fabric manufactured according to an embodiment of the present invention.

In the present application, terms such as “comprise”, “have”, or “include” are intended to designate the existence of features, numbers, steps, components, parts, or combinations thereof described in the specification, and one or more other It should be understood that this does not preclude the possibility of addition or presence of features or numbers, steps, operations, components, parts, or combinations thereof.

In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, the composite false-twisted yarn 100 having excellent expression of different color tones and a manufacturing method thereof according to the present invention will be described in detail based on the accompanying drawings. 1 is a process diagram for manufacturing a composite false twisted yarn 100 having excellent expression of different color tones according to the present invention, and FIG. 2 is a schematic diagram of a melt spinning apparatus 300 according to the present invention, and FIG. 3 is It is a schematic diagram of a false twisting device 500 according to the present invention, FIG. 4 is a schematic diagram of an air bridging device 200 according to the present invention, and FIG. 5 is a composite false twisting yarn 100 having excellent expression of different color tones manufactured according to the present invention. of side (a) and cross-section (b), and FIG. 6 is a photograph after dyeing of the fabric manufactured according to an embodiment of the present invention.

The manufacturing method of the composite false-twisted yarn 100 having excellent expression of different color tones according to the present invention, as shown in FIG. 1 , includes a first step (S100) of melt-spinning a multifilament yarn 10 with high fineness and high elongation; a second step (S200) of melt-spinning the fine-fine, low-elongation multifilament yarn (20); a third step (S300) of false-twisting and hot-drawing the thin-fine high-stretch multifilament yarn (10); a fourth step (S400) of falsely twisting and hot stretching the fineness low elongation multifilament yarn (20); The high-fineness high-elongation multifilament yarn 10 falsely twisted and hot drawn in the third step (S300) and the fine-fineness low elongation multifilament yarn 20 falsely twisted and hot drawn in the fourth step (S400) are air entangled. a fifth step of braiding (S500); and a sixth step (S600) of heat-treating the fine-fine high-elongation multifilament yarn 10 and the fine-fine low-elongation multifilament yarn 20 braided in the fifth step (S500).

That is, the composite false twisted yarn 100 having excellent expression of different color tones according to the present invention is formed by melt spinning a polyethylene terephthalate (PET) polymer using a melt spinning device 300 as shown in FIG. 2 . The fineness high elongation multifilament yarn 10 and the fineness low elongation multifilament yarn 20 are each independently manufactured.

According to a preferred embodiment of the present invention, in the first step (S100), the high fineness and high elongation multifilament yarn 10 is melt-spun. At this time, it is preferable that the spinning speed of the high fineness and high elongation multifilament yarn 10 is 2,200 to 2,800 m/min.

Also, in the second step (S200), the fineness low elongation multifilament yarn 20 is melt-spun, and at this time, the spinning speed of the fine fineness low elongation multifilament yarn 20 is preferably 3,800 to 4,400 m/min. do.

At this time, it is preferable that the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 are manufactured in a circular shape using a circular spinneret alone.

Referring to FIG. 2 , the high fineness high elongation multifilament yarn 10 melt-spun in the first step ( S100 ) melts a polymerized chip of PET at a melting temperature and then through a spinneret 1 . However, it is preferable that the size of the orifice formed in the spinneret 1 is 0.3 to 0.4 mm, and L/D (length/diameter) is 2.5 to 3.0 so that an optimal spinning draft is applied. . As described above, the thread (2) exiting the spinneret (1) is cooled by the cooling wind generated by the cooling wind supply device (3). At this time, the speed of the cooling wind is 0.4 to 0.6 m/sec, and the temperature is preferably 14 to 18 °C.

An emulsion of 8 to 12% by weight based on the weight of the yarn is applied to the cooled thread 2 as described above through the upper oiling roller 4 and the lower oiling roller 5 .

In the present invention, the amount of oil attached to the upper oiling roller 4 and the lower oiling roller 5 is preferably 8 to 12% by weight, because the filament yarn may break due to the tension increase in the subsequent air entangling process. , this is because it is necessary to minimize the increase in tension due to friction when passing through the guide by increasing the amount of adhesion of the oil agent.

After passing through the first godet roller (6), it is wound in the winder (8) through the second godet roller (7) rotating at the same speed.

In addition, the second step (S200) for manufacturing the fineness low elongation multifilament yarn 20 may be performed in the same manner as the first step (S100). However, the second step (S200) is different from the first step only in fineness and spinning speed of the multifilament to be manufactured.

That is, the size of the orifice formed in the spinneret in the second step (S200) is preferably 0.3 to 0.4 mm.

In the present invention, the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 are melt-spun by using the melt spinning apparatus 300 as shown in FIG. 2, but by controlling the fineness and the spinning speed differently. It is preferable to do By differentiating the fineness and the spinning speed during melt spinning as described above, the orientation and crystallinity of the fibers can be differently controlled.

In general, as the spinning speed increases during melt spinning of the polymer, the size of the crystal increases and the degree of crystallinity increases. In addition, the degree of orientation of the amorphous portion is lowered, so that the elongation is high and the specific shrinkage rate is low. Therefore, if the spinning speed is increased during melt spinning of the fiber, the crystal structure is remarkably developed, so that the amount of dyeing during dyeing is reduced. Accordingly, the dye is relatively pale. Therefore, the present invention manufactures the high fineness high elongation multifilament yarn 10 through a low spinning speed of 2,200 to 2,800 mpm through the first step (S100), and a relatively high speed of 3,800 through the second step (S200) The fineness and low elongation multifilament yarn 20 is manufactured by spinning at a spinning speed of ~ 4,400 mpm.

In this way, the difference in the degree of crystallinity, orientation, and morphology of the fiber is given by the difference in spinning speed, and the difference in dyeability is expressed by complexing and dyeing them. That is, the present invention provides a different degree of orientation and crystallinity to fibers by a difference in spinning speed as described above and a difference in fineness at the same time, thereby expressing a more natural melange effect after dyeing due to the difference in dyeability. will be.

In the present invention, all polymers capable of melt spinning are possible as the polymers for producing the fine-fineness high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20, but PET is most preferred.

Looking at the first step (S100) and the second step (S200) in detail, the difference in the spinning speed of the fine-fine high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20 is 1,600 to 2,200 mpm It is particularly preferred.

Due to the difference in the spinning speed as described above, the internal structures of the fibers such as crystallinity and orientation of the high-fineness high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20 are different from each other, and the resulting Due to the difference in dyeability, the melange effect is maximized and expressed after dyeing.

That is, the high fineness high elongation multifilament yarn 10 has a crystal structure that is significantly lower than that of the general drawn filament yarn because a minimum stress below the critical stress required for drawing is applied. Therefore, the high fineness and high elongation multifilament yarn 10 spun at a low speed has a high dyeing amount compared to the existing drawn filament yarn during dyeing, so it can be dyed in a dark color and has a fast dyeing speed. This is because the high fineness and high elongation multifilament yarn 10 spun at a low speed has a low degree of orientation in the amorphous region and has a non-dense structure, so that it is easy to penetrate the dye so that it can be dyed with a deep color.

In addition, in the present invention, in order to maximize the melange effect resulting from the difference in dyeability between the coarse fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20, the coarse fineness high elongation multifilament yarn (10) ) and the difference between the fineness and the total fineness of the low elongation multifilament yarn 20 is preferably 300 to 400 denier.

That is, when the difference in the total fineness of the coarse fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 is less than 300 denier, the difference in dyeability produced is small and the expressed melange effect is reduced. Conversely, when the difference in fineness between the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 exceeds 400 denier, the resistance is increased during heat treatment in a yarn guide and a heater, resulting in a composite cost As the twisted yarn 100 is damaged by friction, the yarn trimming phenomenon is increased.

And it is preferable that the difference in the number of filaments between the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 is 24 to 84. When the difference in the number of filaments between the fine-fineness high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20 is less than 24, the composite entanglement state between the filaments is poor during the sanding process, resulting in deterioration of workability and melange The tone expression effect is reduced. Conversely, when the difference in the number of filaments between the fine-fineness high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20 exceeds 84, the number and strength of entanglements formed by air pressure during air entanglement. does not reach the level required in the post-processing of the fabric, and the crimping properties are deteriorated.

And when the difference in the elongation between the fine-fine-doing high-elongation multifilament yarn 10 and the fine-fineness low elongation multifilament yarn 20 is 100 to 200%, the expression of a different color tone can be maximized. That is, when the difference in elongation between the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 is less than 100%, the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multi Since the difference in dyeability between the filament yarns 20 is not expressed, the expression effect of melangitone is reduced. In addition, when the elongation difference exceeds 200%, the crimping characteristics of the composite false twisted yarn 100 are lowered, so that the expression of elasticity and volume of the fabric is lowered.

As described above, by controlling the spinning speed during melt spinning of the high-fineness high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20 constituting the composite false twisted yarn 100, physical properties such as orientation and crystallinity of the fibers are controlled. Control, and also optimize the elongation, fineness, and number of filaments of the high-fineness high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20 to entangle the air, after dyeing due to the difference in the internal structure of the fiber The dichroic effect is maximized, and thus the dichroism and melange effect of the fabric can be maximized.

Specifically, the PET composite false-twisted yarn 100 capable of expressing different color tones according to the present invention is composed of a fine-fine high-elongation multifilament yarn 10 and a fine-fine low-elongation multifilament yarn 20 having different dyeing characteristics. During the manufacture of the knitted fabric, a dichroic color tone in which various color tones are mixed is expressed on the dyed woven and knitted fabric, and accordingly, a melange effect is exhibited, resulting in excellent appearance.

In addition, the PET composite false twisted yarn 100 capable of expressing different color tones of the present invention is melt-spun using a conventional polymer with different manufacturing conditions such as spinning speed, thereby changing the internal structure of the fiber and dyeing with different color tones and Since the melange effect is expressed, it can be manufactured without a factor of increasing manufacturing cost.

The thick fineness high elongation multifilament yarn 10 manufactured as described above is later performed as a third step (S300), and the coarse fineness high elongation multifilament yarn 10 is twisted using the twisting device 500 shown in FIG. 3 . Thus, false rolling and hot stretching are performed at the same time.

In the third step (S300), the high fineness and high elongation multifilament yarn 10 is subjected to false twisting and hot drawing at the same time in the false twisting device 500 shown in FIG. ) is supplied to the combustible unit 550 at a rate of 350 to 750 mpm.

The combustible unit 550 used in the present invention may be a device consisting of two or more pairs of friction disks. The principle of imparting twist by friction is to guide the yarn on several friction discs and twist it by friction between the disc and the yarn. At this time, the number of twists and the unwinding tension are set by changing the yarn speed ratio (D/Y ratio: ratio of disk speed to yarn speed), and the number of disks, thickness, and diameter can also be adjusted.

In addition, since the heat treatment temperature for the fiber affects the shrinkage and dyeability of the fiber, the high fineness and high elongation multifilament yarn 10 is heated at 180 to 220° C. in the first heater 520 shown in FIG. 3 . It is preferable to perform thermal stretching while heat-treating with a furnace.

When the heat treatment temperature of the first heater 520 is less than 180 ℃, there is a problem in stabilization of twist, and when it exceeds 220 ℃, the supplied high-fineness high-elongation multifilament yarn 10 changes physical properties due to melting And there is a problem of poor dyeability.

The high fineness high elongation multifilament yarn 10 heat-treated as described above is hot drawn by the speed difference between the first feed roller 530 and the second feed roller 540 while passing through the first heater 520, At this time, it is preferable that hot stretching is performed at a draw ratio of 1.8 to 2.5 due to a speed difference between the first feed roller 530 and the second feed roller 540 .

The high fineness high elongation multifilament yarn 10 that has been false-twisted and hot-drawn as described above is wound around the first winding roller 560 while untwisting the twist applied during false twisting.

In addition, as a fourth step (S400), false twisting and hot drawing are simultaneously performed on the fineness and low elongation multifilament yarn 20 using the same false twisting device 500 shown in FIG. 3 .

That is, in the same manner as the high fineness high elongation multifilament yarn 10 , the fine fineness low elongation multifilament yarn 20 also performs false twisting and hot drawing at the same time in the false twisting device 500 through the fourth step ( S400 ). At this time, the fine fineness low elongation multifilament yarn 20 is supplied to the false twisting device 500 at the same speed as the fine fineness high elongation multifilament yarn 10 , that is, at a speed of 350 to 750 m/min.

In addition, the fineness low elongation oriented multifilament yarn 20 is also heated while passing through the first heater 520 , and is hot drawn by the speed difference between the first feed roller 530 and the second feed roller 540 . At this time, it is preferable that the draw ratio of the fineness low elongation multifilament yarn 20 is 1.1 to 1.5. In this case, the heat treatment temperature in the first heater 520 is preferably 180 to 220 ° C., which is the same as that of the high fineness and high elongation multifilament yarn 10 . As described above, the fine-fine-low-elongation multifilament yarn 20 falsely twisted and hot drawn in the fourth step (S400) is wound around the first winding roller 560 while untwisting the twist applied during false twisting.

As described above, the coarse-fine high-elongation multifilament yarn 10 and the fine-fine low-elongation multifilament yarn 20 that were false-twisted and hot drawn in the third step (S300) and the fourth step (S400) are subsequently entangled by air. A fifth step (S500) of braiding is performed. The air entanglement process in the fifth step (S500) as described above can be performed using the air entanglement device 200 as shown in FIG. 4 .

That is, as shown in FIG. 4 , the fine-fine high-elongation multifilament yarn 10 is supplied to the air entangling unit 30 through the third feed roller 51, and the fine-fineness low-elongation multifilament yarn 20 ) is supplied to the air entanglement unit 30 through the fourth feed roller 52 . As described above, the high fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 supplied together with the air entanglement unit 30 were entangled in the air entanglement unit 30 and braided. After that, it is subjected to heat treatment as a sixth step ( S600 ) through the fifth feed roller 53 .

At this time, it is preferable that the air pressure at the time of air entanglement in the air entanglement unit 30 is 0.2 to 1.0 bar, and when the air pressure in the air entanglement unit 30 is less than 0.2 bar, insufficient twisting may occur. And, when it exceeds 1.0 bar, a problem of lowering dead strength may occur.

The fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 braided by air entanglement as described above are later as shown in FIG. 4 , using a second heater 40 A sixth step (S600) of heat-treating the composite false twisted yarn 100 on which the air entanglement is completed is performed.

At this time, the temperature of the second heater 40 is preferably 185 ~ 205 °C , and the heat treatment time is preferably 10 ~ 30 seconds. That is, when the temperature of the second heater 40 is less than 185 ° C. and the heat treatment time is less than 10 seconds, the thermal stress is lowered, so that the expression of the crimping characteristics of the composite false twisted yarn 100 is not smooth, and the second heater ( When the temperature of 40) exceeds 205 ° C. and the heat treatment time exceeds 30 seconds, the physical properties of the composite false twisted yarn 100 become non-uniform, resulting in a problem that the touch is not soft. Therefore, the bulkiness difference and the shrinkage rate difference can be induced to the maximum at the heat treatment temperature as described above, so that the bulkiness and elasticity can be effectively imparted to the fabric.

In the sixth step (S600), the braided high fineness high elongation multifilament yarn 10 and fine fineness low elongation multifilament yarn 20 may be supplied as an overfeed during heat treatment.

That is, the overfeed rate in the first overfeed zone formed between the fifth feed roller 53 and the sixth feed roller 54 after the air entanglement unit 30 is preferably 1 to 2%, The overfeed rate in the second overfeed zone formed between the sixth feed roller 54 and the seventh feed roller 55 is preferably 2 to 5%.

If the overfeed rate in the first overfeed zone is less than 1%, the crimp effect may not be well expressed, and if it exceeds 2%, the workability may be poor.

In addition, if the overfeed rate in the second overfeed zone is less than 2%, there may be a problem that air entanglement is not made well, and when it exceeds 5%, the fineness low elongation multifilament yarn 20 protrudes from the surface of the yarn There may be a problem in that the expression of the melange effect is reduced.

That is, by heat-treating the braided high-fineness high-elongation multifilament yarn 10 and fine-fineness low-elongation multifilament yarn 20 while supplying the overfeed in the sixth step (S600), the crimping effect is uniformly expressed and crimped. The properties are excellent, and the phenomenon of yarn breakage is reduced.

After the heat treatment is completed in the sixth step (S600) as described above, by winding the second winding roller 50, the production of the composite false-twisted yarn 100 having excellent expression of different color tones of the present invention is completed. At this time, it is preferable to wind at 350 to 750 m/min so that the second winding roller 50 has the same winding speed as the supply speed of the composite false twisted yarn 100 .

As described above, when the yarn speed is less than 350 m/min when the composite false-twisted yarn 100 is wound, the expression of different color tones is low, and when it exceeds 750 m/min, the instability of the yarn increases and uniform color expression is difficult and rough loop will be formed

When the composite false-twisted yarn 100 is wound around the second winding roller 50 as described above, the manufacturing of the composite false-twisted yarn 100 having excellent expression of different color tones according to the present invention as shown in FIG. 5 is completed.

That is, the composite false-twisted yarn 100 with excellent expression of different color tones prepared according to the present invention is a fine color low elongation multifilament yarn 20 that is dyed with a dark color after dyeing as shown in FIG. It is dyed so that the side has a linear shape by the high fineness and high elongation multifilament yarn 10 to be dyed. In addition, the cross section of the composite false-twisted yarn 100 of the present invention also shows a fine-fine low-elongation multifilament yarn 20 that is dyed in a dark color after dyeing, and a high-fineness high-elongation multifilament yarn 10 that is dyed in a light color (b) The shape of the cross-section is formed as shown in Fig.

As described above, in the first step (S100) to the sixth step (S600), the orientation and crystallinity of the coarse-fine high-elongation multifilament yarn 10 and the fine-fine low-elongation multifilament yarn 20 according to the spinning speed and the draw ratio, respectively When controlling differently, and giving a difference in elongation, fineness, and number of filaments between the high-fineness high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20 The difference in dyeability between the multifilament yarn 10 and the fineness low elongation multifilament yarn 20 is maximized. Accordingly, after dyeing, the color difference (ΔE) of the large fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 is 2.0 or more, so that anyone can visually recognize the color difference, thereby A soft and delicate melangiton effect can be expressed.

In addition, when weaving or knitting by using the composite false twisted yarn 100 manufactured as described above, excellent dichroic color tone and melange tone effect differentiated from conventional materials can be expressed.

On the other hand, the dichroic color tone and melange effect of the composite false twisted yarn 100 can be evaluated using a color difference (ΔE). That is, the composite false-twisted yarn 100 according to the present invention is composed of a high fineness high elongation meltfilament yarn 10 and a fine fineness low elongation multifilament yarn 20 having different dyeing characteristics from each other. Also, different colors may be implemented in the meltifilament yarn 10 and the fineness low elongation multifilament yarn 20 , or a concentration gradient with respect to brightness may be provided.

In the composite false twisted yarn 100 according to the present invention, two or more colors are expressed by the dyeing process as described above, so that a fabric to which a melange effect is imparted can be easily obtained without a separate process when manufacturing a woven or knitted fabric. Here, in the composite false-twisted yarn 100 according to the present invention, two or more different colors are expressed in the high-fineness high-elongation melti filament yarn 10 and the fine-fineness low elongation multifilament yarn 20 through the dyeing process. (ΔE) will occur.

The composite false-twisted yarn 100 having excellent expression of different color tones of the present invention exhibits an average color difference of 2.0 or more when measuring CIE color coordinates for two arbitrarily selected points of the fabric. And when the color difference exceeds 2.0 as described above, it can be evaluated that the melange effect is excellent.

Hereinafter, the present invention will be described in more detail through Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

[Example]

Using PET resin with an intrinsic viscosity (IV) of 0.60 dl/g and an MI (melt index) of 30 g/10min, using a circular spinneret at a spinning speed of 4,000 m/min, fineness and low elongation of 100 denier/36 filaments The multifilament yarn 20 was melt-spun. In addition, the same PET resin was prepared by melt-spinning each of 430 denier/72 filament, high-strength multifilament yarn (10) using a circular spinneret at a spinning speed of 2,500 m/min. This ‹š the elongation of the multifilament yarn (10) with high fineness and fineness is 240%, and the elongation of the multifilament yarn with fineness and low elongation (20) is 90%.

Thereafter, hot stretching was performed while falsely twisting the high fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 in the false twisting device 500 . That is, the high fineness and high elongation multifilament yarn 10 was supplied to the false twisting device 500 at a speed of 450 m/min, and the VR ratio was set to 2.5. In addition, the temperature of the first heater 520 was 200° C., and the stretching ratio during hot stretching was adjusted to 2.5.

In addition, the fineness low elongation multifilament yarn 20 was supplied to the false twisting device 500 at a speed of 450 m/min, and the VR ratio was 1.5. In addition, the temperature of the first heater 520 was 200 °C, and the draw ratio was adjusted to 1.2.

As described above, the false-twisted and hot-drawn multifilament yarn 10 and the fineness low elongation multifilament yarn 20 are then supplied to the air entanglement device 200 and air entangled with an air pressure of 0.7 bar. and merged.

Thereafter, the overfeed rate in the first overfeed zone is 1.4%, the overfeed rate in the second overfeed zone is 3.65%, and the heat treatment in the second heater 40 is performed at 200° C. for 15 seconds. and was wound at a speed of 600 m/min to prepare a composite false twisted yarn 100 .

The composite false twisted yarn 100 was then knitted in a small amount into socks, dyed with a disperse dye at 105° C. for 30 minutes, and washed to prepare a test piece.

[Comparative example]

The composite false twisted yarn 100 and the test piece were manufactured under the same conditions as in the above embodiment, but the spinning speed of the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 was set to 3,000 m/min. Thus, a test piece was prepared.

A photograph of the example prepared as described above is shown in FIG. 6 . Referring to FIG. 6, it is observed that, in the case of the test piece of the example, that is, FIG. 6, the boundary line between hyperchromic and pale color is clearly distinguished, and a natural irregular melange effect is expressed. At this time, the color difference (ΔE) after dyeing of the large fineness high elongation multifilament yarn (10) and the low fineness low elongation multifilament yarn (20) was measured to be 2.2. Therefore, in the case of the test piece of Example, it can be confirmed that a natural melange effect that can visually recognize a color difference is expressed.

On the contrary, in the case of the test piece of Comparative Example, the boundary line between hyperchromic and pale color is unclear and blurry, so that the melange effect is not clearly expressed.

As described above, according to the manufacturing method of the composite false-twisted yarn 100 having excellent melangitone expression of the present invention, natural melangitone expression is excellent without an increase in manufacturing cost, and the inherent crimpability of yarn processing is imparted to the conventional material. It is possible to manufacture the composite false-twisted yarn 100 that can express a differentiated sensibility.

Although the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

1: spinneret
3: Cooling wind supply device
4: Upper oiling roller
5: Lower oiling roller
6: 1st Godtroller
7: 2nd Godtroller
10: large fineness high elongation multifilament yarn
20: fineness low elongation multifilament yarn

Claims (5)

A first step (S100) of manufacturing a multifilament yarn 10 with high fineness and high elongation by melt spinning;
A second step (S200) of melt-spinning to produce a fine-fine, low-elongation multifilament yarn (20);
a third step (S300) of false-twisting and hot-drawing the thin-fine high-stretch multifilament yarn (10);
a fourth step (S400) of falsely twisting and hot stretching the fineness low elongation multifilament yarn (20);
The high-fineness high-elongation multifilament yarn 10 falsely twisted and hot drawn in the third step (S300) and the fine-fineness low elongation multifilament yarn 20 falsely twisted and hot drawn in the fourth step (S400) are air entangled. a fifth step of braiding (S500); and
A sixth step (S600) of heat-treating the high-fineness high-elongation multifilament yarn 10 and the fine-fineness low-elongation multifilament yarn 20 braided in the fifth step (S500) (S600);
The difference in the total fineness of the coarse fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 is 300 to 400 denier, and the difference in the number of filaments is 24 to 84,
In the third step (S300) and the fourth step (S400), the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 are applied to the false twisting device at a speed of 350 to 750 meters/min. supplied and hot drawn at a draw ratio of 1.8 to 2.5,
The method of manufacturing a PET composite false twisted yarn 100 capable of expressing different color tones, characterized in that the color difference (ΔE) between the fine fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 is 2.0 or more.
The method according to claim 1,
The method of manufacturing a PET composite false twisted yarn 100 capable of expressing a different color tone, characterized in that the coarse fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 are polyethylene terephthalate.
The method according to claim 1,
The spinning speed of the fine fineness high elongation multifilament yarn 10 is 2,200 to 2,800 m/min, and the spinning speed of the fine fineness low elongation multifilament yarn 20 is 3,800 to 4,400 m/min. A method of manufacturing a PET composite false twisted yarn 100 capable of expressing
The method according to claim 1,
The color difference (ΔE) after dyeing of the coarse fineness high elongation multifilament yarn 10 and the fine fineness low elongation multifilament yarn 20 is 2.0 or more. Way.
A PET composite false-twisted yarn (100) capable of expressing a dichroic color tone manufactured by the method for manufacturing a PET composite false-twisted yarn (100) capable of expressing a dichroic color tone according to any one of claims 1 to 4.

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