TW202338176A - Composite false twisted yarn, woven fabric and clothing - Google Patents

Abstract

The purpose of the present invention is to provide a composite false twisted yarn and a woven fabric having an excellent feeling of bulkiness and softness in addition to having excellent stretchability and being particularly suitable for use in clothing, and also to provide clothing using the same. The present invention provides a composite false twisted yarn comprising a polyamide fiber A and a polyamide fiber B, wherein the polyamide fiber A is a latent crimp yarn, the polyamide fiber B is not a latent crimp yarn, and the ratio of adjacent filament groups in the polyamide fiber A is 50% or more.

Description

Composite false twist processed yarn, woven/knitted fabrics and clothing

The invention relates to a polyamide composite false twist processed yarn, woven/knitted fabrics and clothes.

Conventionally, in fibers for clothing, stretchability has been mainly imparted to polyester fibers in order to improve wearing comfort by improving movement following properties during wearing, or to efficiently perform sports functions. In addition, in recent years, in addition to stretchability, it is also required to provide texture such as bulkiness or softness.

So far, for polyamide fibers that are softer than polyester fibers and have good touch, it has been proposed to combine polyamides with different compositions into a side-by-side type as disclosed in Patent Document 1. fiber.

In addition, in order to obtain bulkiness, for example, as disclosed in Patent Document 2, a mixed yarn containing side-by-side fibers of two types of polyamides with different viscosities and other polyamide fibers has been proposed, or as disclosed in Patent Document 3 Disclosed is a loop yarn, which includes a layer mainly composed of polyethylene terephthalate and a layer mainly composed of polytrimethylene terephthalate, compounded into a side-by-side or Shearth-core type polyester composite fiber and polyamide fiber. [Prior art documents] [Patent Document]

Patent Document 1: International Publication No. 2015/129735 Patent Document 2: Japanese Patent Application Publication No. 2004-270085 Patent Document 3: Japanese Patent Application Publication No. 2005-146447

[Problem to be solved by the invention] As one method of improving softness, one may consider using polyamide fiber, which is softer than polyester fiber. However, the technology disclosed in Patent Document 1 can suppress the occurrence of fine lines and improve stretchability. However, since the crimp pattern is single, the fabric becomes a knitted/knitted fabric with insufficient bulkiness.

In addition, in the technology disclosed in Patent Document 2, a mixed-fiber processed yarn with excellent bulkiness can be obtained. However, the single yarns of side-by-side fibers that exhibit stretchability by blending are mixed with each other and do not exhibit stretchability. Because of the single yarn of polyamide fiber, the crimp expression of the side-by-side fiber is hindered and sufficient stretchability cannot be obtained. Furthermore, in the technology disclosed in Patent Document 3, bulkiness can also be obtained, but by using side-by-side fibers containing polyester, although bulkiness can be obtained, like Patent Document 2, the winding of the side-by-side fibers The shrinkage performance is hindered, and due to the difference in dyeability between polyester and polyamide, the leveling or fastness is low and cannot be used optimally for clothing.

Therefore, an object of the present invention is to solve the above-mentioned problems. Specifically, the object is to provide a composite false-twisted yarn that has excellent functions such as elongation and has excellent handles such as bulkiness and softness, and can be preferably used for clothing. And woven/knitted fabrics and clothes using them. [Means to solve the problem]

The composite false-twisted yarn of the present invention includes polyamide fiber A and polyamide fiber B. The polyamide fiber A is a latent crimp yarn, the polyamide fiber B is not a latent crimp yarn, and the polyamide fiber A is a latent crimp yarn. The adjacent filament group ratio of the polyamide fiber A is 50% or more.

According to a preferred aspect of the composite false-twisted yarn of the present invention, the elongation difference between the polyamide fiber A and the polyamide fiber B is 7.0% or more and 40.0% or less.

According to a preferred aspect of the composite false-twisted yarn of the present invention, the single yarn fineness of the polyamide fiber B is 0.3 dtex or more and 0.9 dtex or less.

According to a preferred aspect of the composite false-twisted yarn of the present invention, the polyamide fiber A is an eccentric core-sheath type composite cross-section with an equilibrium moisture regain of 6.3% or less, and the polyamide constituting the core component and the polyamide constituting the sheath component are The viscosity ratio of amide is 1.20 or more and 1.40 or less.

The woven/knitted fabric of the present invention contains at least a part of the composite false-twisted yarn of the present invention that exhibits crimp.

The garment of the present invention contains at least a part of the composite false-twisted yarn of the present invention that exhibits crimp.

The garments of the present invention comprise, at least in part, the woven/knitted fabric of the present invention. [Effects of the invention]

According to the present invention, it is possible to obtain a composite false-twisted yarn that is excellent not only in elongation but also in textures such as bulkiness and softness. In particular, the composite false-twisted yarn of the present invention can be made into a woven/knitted fabric that can be preferably used for clothing or clothing using the same.

The composite false-twisted yarn of the present invention includes polyamide fiber A and polyamide fiber B. The polyamide fiber A is a latent crimp yarn, the polyamide fiber B is not a latent crimp yarn, and the polyamide fiber A is a latent crimp yarn. The adjacent filament group ratio of the polyamide fiber A is 50% or more.

The polyamide fiber A in the present invention is a latent crimp yarn, and is a fiber composed of two or more polyamides with different shrinkage properties and compounded into a side-by-side or eccentric core-sheath type shape. The latent crimp yarn can be preliminarily given crimp by false twisting processing, etc., and it also includes cases where the crimp increases due to the shrinkage difference of the composite polymer.

Here, the parallel type may be, for example, a structure in which a semicircular first polymer and a semicircular second polymer are joined, or a composite structure in which an arc-shaped first polymer and a second polymer are joined together. . As long as the effects of the present invention are not hindered, the eccentric core-sheath type fiber may contain a polymer different from the first polymer and the second polymer.

The so-called eccentric core-sheath type refers to a composite fiber in which at least two polymers form an eccentric core-sheath structure. Here, eccentricity means that in the cross section of the composite fiber, the position of the center of gravity of the polymer constituting the core component is different from the center of the cross section of the composite fiber. In addition, the core-sheath refers to a state in which the first polymer as the core component is covered with the second polymer as the sheath component. As long as the effects of the present invention are not hindered, the eccentric core-sheath type fiber may contain a polymer different from the first polymer and the second polymer as long as it is covered with the first polymer.

It is preferable that the polyamide constituting the polyamide fiber A and the polyamide fiber B of the present invention is crystalline because quality stability is improved. The so-called crystalline polyamide is a polyamide that forms crystals and has a melting point, and is a polymer in which a so-called hydrocarbon group is connected to the main chain via a amide bond. Specifically, polycapramide, polyhexamethylene adipamide, polyhexamethylene adipamide, polytetramethylene adipamide, 1,4-bis Condensation-polymerized polyamides of (aminomethyl)cyclohexane and linear aliphatic dicarboxylic acids, and their copolymers or mixtures thereof, etc.

The polyamide fiber A of the present invention is a latent crimp yarn, the first polymer is the first polyamide, and the second polymer is the second polyamide. The first polyamide is a different type of polyamide from the second polyamide described later among nylon 6, nylon 66, nylon 4, nylon 610, nylon 11, nylon 12, etc. and copolymers containing these as main components. As long as the effect of the present invention is not inhibited, components other than lactam, aminocarboxylic acid, diamine and dicarboxylic acid may be contained in the repeating structure. Among these, elastomers containing polyols and the like in a repeating structure are excluded from the viewpoint of yarn-making properties and strength.

In addition, from the viewpoint of yarn-making properties, strength, and anti-peeling properties, it is preferable that at least 90% of the repeating structure be a single lactam, an aminocarboxylic acid, or a combination of a diamine and a dicarboxylic acid. polymer, preferably more than 95% of the repeating structure. From the viewpoint of thermal stability, a particularly preferred aspect is that the component is nylon 6 or its copolymer.

In addition, the second polyamide is obtained, for example, by a combination of a dicarboxylic acid unit and a diamine unit whose main component is a sebacic acid unit. In particular, nylon 610 and its copolymer, which have stable polymerization properties, less yellowing of crimped yarns, excellent stretchability of woven/knitted fabrics, and good dyeability, can be optimally used. Here, sebacic acid can be produced by purifying castor oil seeds, for example, and is positioned as a plant-derived raw material.

Examples of the dicarboxylic acid constituting the dicarboxylic acid unit other than the sebacic acid unit include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, and ophthalmic acid. Dicarboxylic acids such as phthalic acid, isophthalic acid, terephthalic acid, etc. can be blended within a range that does not impair the effects of the present invention.

Moreover, regarding these dicarboxylic acids, plant-derived dicarboxylic acids are also preferred. The copolymerization amount of the dicarboxylic acid units other than the sebacic acid units is preferably 0 mol% to 40 mol%, more preferably 0 mol% to 20 mol%, in all dicarboxylic acid units. The best form is 0 mol% to 10 mol%.

Examples of the diamine constituting the diamine unit include diamines having 2 or more carbon atoms, preferably diamines having 4 to 12 carbon atoms. Specific examples include butanediamine (putrescine) and 1,5-pentanediamine. Diamine, hexamethylenediamine, trimethylenediamine, nonanediamine, methylpentanediamine, phenylenediamine, ethambutol, etc. In addition, among these diamines, plant-derived diamines are also preferred.

The total fineness of the polyamide fiber A is preferably 5 points-tex or more and 300 points-tex or less, more preferably 10 points-tex or more and 200 points-tex or less. By setting the total fineness within the above range, the composite false-twisted yarn and the knitted/knitted fabric can have excellent strength while achieving a comfortable wearing feel. In addition, the single yarn fineness is preferably 5.0 centtex or less, more preferably 2.5 centtex or less. The lower limit of single yarn fineness is essentially 0.7 decitex. By setting the single yarn fineness within this range, the rigidity of the crimp will not become too strong, and composite false-twisted yarn and knitted/knitted fabrics with improved softness can be obtained.

The elongation of the polyamide fiber A is preferably from 45% to 90%, more preferably from 55% to 80%. By setting the elongation within the above-mentioned range, sufficient elongation can be achieved during composite false twist processing, and the difference in yarn amount from the polyamide fiber B described below can be adjusted.

The polyamide fiber B in the present invention is a polyamide fiber different from the polyamide fiber A. Polyamide fiber B is not a latent crimp yarn. Since the polyamide fiber B does not have latent crimp, the expansion of the composite false-twisted yarn after dyeing becomes larger.

As for the polyamide fiber B, as long as it does not hinder the effect of the present invention, it can be used in nylon 6, nylon 66, nylon 4, nylon 610, nylon 11, nylon 12, etc. and copolymers containing these as main components. The repeating structure contains components other than lactam, aminocarboxylic acid, diamine and dicarboxylic acid. Among these, elastomers containing polyols and the like in a repeating structure are excluded from the viewpoint of yarn-making properties and strength.

In addition, from the viewpoint of yarn-making properties, strength, and anti-peeling properties, it is preferable that at least 90% of the repeating structure be a single lactam, an aminocarboxylic acid, or a combination of a diamine and a dicarboxylic acid. polymer, preferably more than 95% of the repeating structure. From the viewpoint of thermal stability, a particularly preferred aspect is that the component is nylon 6 or its copolymer.

The total fineness of the polyamide fiber B is preferably 5 points-tex or more and 200 points-tex or less, more preferably 10 points-tex or more and 150 points-tex or less. By setting the total fineness within the above range, the composite false-twisted yarn and the knitted/knitted fabric can have excellent strength while achieving a comfortable wearing feel. In addition, the single yarn fineness is preferably 2.0 decitex or less, more preferably 0.9 decitex or less. The lower limit of single yarn fineness is preferably 0.3 decitex. By setting the single yarn fineness in this range, the fibers on the surface of the knitted/knitted fabric become thinner, and a composite false-twisted yarn and knitted/knitted fabric with more excellent softness can be obtained.

The elongation of the polyamide fiber B is preferably from 30% to 90%, more preferably from 50% to 80%. By setting the elongation within the above range, the yarn length difference with the polyamide fiber A can be controlled by the difference in processing tension with the polyamide fiber A during composite false twist processing.

The adjacent filament group ratio of the polyamide fiber A (latent crimp yarn) in the composite false-twisted yarn of the present invention is 50% or more, preferably 85% or more. The adjacent filament group ratio of the latent crimp yarn was calculated by the method described in the Example. The so-called high adjacent filament group ratio of the latent crimp yarn refers to the presence of latent crimp yarn adhesion in the composite false-twisted yarn. By setting the adjacent filament group ratio of the latent crimp yarn to this range, Latent crimped yarn fully exhibits crimp, and composite false-twisted yarn and woven/knitted fabrics with excellent extensibility and bulk can be obtained.

The expansion and contraction recovery rate (crimp recovery rate (CR)) of the composite false-twisted yarn of the present invention is preferably 20% or more, more preferably 25% or more. By setting the CR in this range, high elongation and recovery properties can be obtained.

In addition, the CF value of the composite false twist processing of the present invention is preferably from 50 to 200, more preferably from 100 to 150. By designing the CF value into this range, the step passability can be improved without impeding the extensibility.

In addition, as needed, polyamide fiber A and polyamide fiber B can be added with pigments, heat stabilizers, antioxidants, weathering agents, flame retardants, plasticizers, release agents, lubricants, foaming agents, Antistatic agents, formability improvers, and strengthening agents are used.

The composite ratio (weight) of polyamide fiber A and polyamide fiber B in the composite false-twisted yarn of the present invention is preferably such that the ratio of polyamide fiber A is 30% or more and 80% or less, more preferably 40 % and above and below 80%. By setting the compound ratio in this range, it is possible to achieve both stretchability, bulkiness, and softness.

The elongation difference between polyamide fiber A and polyamide fiber B in the composite false-twisted yarn of the present invention is preferably 7.0% or more and 40.0% or less, more preferably 9.0% or more and 20.0% or less. If the difference in elongation between polyamide fiber A and polyamide fiber B is 7.0% or more, for example, when polyamide fiber B has a higher elongation than polyamide fiber A, polyamide fiber B will The false-twisted yarn is arranged on the outside in the transverse section, resulting in a yarn length difference, whereby the composite false-twisted yarn acquires bulk. In addition, the color development properties of the polyamide fiber B during dyeing processing become good, and the leveling properties are also excellent. In addition, when the difference in elongation between the polyamide fiber A and the polyamide fiber B is 40% or less, the tension during false twist processing is stable, and therefore the workability is excellent. The elongation difference in this range can be obtained by setting the stretching ratio so that the tension of the polyamide fiber A during stretching becomes relatively high in the composite false twist processing.

In addition, by using the polyamide fiber A in the composite false-twisted yarn of the present invention as an eccentric core-sheath type composite fiber instead of a side-by-side composite fiber, stable yarn production can be performed and excellent quality can be obtained.

In the present invention, the polyamide fiber A preferably has an equilibrium moisture regain of 6.3% or less when the relative humidity is 90RH% at a temperature of 30°C and a treatment time of 72 hours. The so-called equilibrium moisture regain mentioned here refers to the equilibrium moisture regain measured in accordance with Japanese Industrial Standards (JIS) L 1013 8.2 (2021). By setting the equilibrium moisture regain to 6.3% or less, the polyamide fiber swells less under moist and hot conditions such as the scouring step or the dyeing process, and the elongation of the woven/knitted fabric becomes small, and fine lines and wrinkles can be suppressed. This allows the knitted/knitted fabric to pass through steps such as a scouring step or a dyeing process without applying unnecessary tension to the knitted/knitted fabric. As a result, a knitted/knitted fabric having excellent stretchability can be obtained. The optimal equilibrium moisture regain rate is below 6.0%. The optimal equilibrium moisture regain rate is above 1.0%.

In addition, when the polyamide fiber A used in the present invention is an eccentric core-sheath type composite fiber, the moisture content of the second polyamide constituting the sheath is preferably 4.0% or less, more preferably 3.5% or less. . The moisture content is preferably 1.0% or more. It is preferable to arrange a polyamide with a lower moisture content than the polyamide composite fiber in the present invention, and more preferably a polyamide with a lower moisture content than the first polyamide of the core component on the sheath side. . By these, the swelling caused by moist heat, which is unique to polyamide, can be further suppressed, and better stretchability can be obtained in the product after the dyeing process.

The moisture content is measured based on JIS L 7251 (2002) A method, with a relative humidity of 90RH% at a temperature of 23°C and a treatment time of 72 hours. The core part and the sheath part of the eccentric core-sheath type composite fiber are separated and only the sheath component is used, or when the sheath component can be specified, the measurement is performed using the same material.

In addition, a preferred aspect of the composite ratio of the polyamide latent crimp yarn is first polyamide: second polyamide = 6:4 to 4:6 (mass ratio). By setting the mass ratio to 6:4 to 4:6, it is easy to control the equilibrium moisture regain of the polyamide composite fiber in the present invention to less than 6.3%, and the obtained composite false-twisted yarn and knitting/knitting can be Provides excellent stretchability.

Furthermore, the polyamide composite fiber in the present invention is preferably: the viscosity ratio of the polyamide constituting the core component and the polyamide constituting the sheath component, that is, whether it is the core component or the sheath component, the composite polyamide The relative viscosity of the polyamide with the largest internal relative viscosity divided by the relative viscosity of the polyamide with the smallest relative viscosity is 1.20 or more and 1.40 or less, more preferably 1.22 or more and 1.40 or less, further preferably 1.30 or more and 1.40 the following. By selecting a polyamide with a relative viscosity that brings the viscosity ratio into this range, the polyamide exhibits a difference in shrinkage after heat treatment, exhibits stronger crimping, and improves the stretchability of the woven/knitted fabric.

In the present invention, by using the eccentric core-sheath type polyamide composite fiber with an equilibrium moisture regain of 6.3% or less as a false-twisted yarn, the effect of swelling can be further suppressed, and the effect of the false-twisted yarn can be exhibited. When the equilibrium moisture regain exceeds 6.3%, or when the composite fiber is of parallel type, even if false twisting is performed, it is difficult to obtain the desired effect due to swelling in the step. In addition, twisted yarn commonly used in side-by-side composite fibers may also be included within the range that does not impair the effect of the present invention. However, compared with false-twisted yarn, the quality, feel, and stretchability tend to be inferior, so careful mixing is required. .

The knitted/knitted fabric of the present invention contains at least a part of the composite false-twisted yarn of the present invention that exhibits crimp (hereinafter, “exhibiting crimp” may be omitted and referred to as “composite false-twisted yarn”). The curl is expressed by dyeing processing, and the method will be described later.

For example, in the case of a knitted fabric, in order to improve the stretchability of the knitted fabric, at least one of the warp yarns and the weft yarns may be composed only of the composite false-twisted yarn of the present invention. In addition, in the case of a knitted fabric, a part of the constituting yarn only needs to be the composite false-twisted yarn of the present invention. However, in order to make the knitted fabric more stretchable, it is also preferable to form one or both sides of the knitted fabric. , the mixing rate of the composite false-twisted yarn of the present invention is more than 50%. The mixing ratio of polyamide composite fibers is determined according to JIS L 1030-2 (2012). Furthermore, since the false-twisted yarn is converged in a heated state during the false-twisting process and undergoes cross-sectional deformation, the presence or absence of the false-twisting process can be determined by observing the cross-section of the fiber.

In the woven/knitted fabric of the present invention, fibers other than the composite false-twisted yarn of the present invention may be used within the scope that does not impair the effects of the present invention. The raw materials are not particularly limited, from the viewpoint of dyeing fastness or stretchability. In particular, it is preferable to use stretch yarns containing polyamide fibers or cationic dyeable polyester fibers, or to coat polyamide fibers, cationic dyeable polyester fibers or various natural fibers or semi-synthetic fibers on polyurethane. Stretch yarn made of acid ester fiber. In addition, it is more preferable to use a stretch yarn containing polyamide fiber because the surface quality is also excellent.

The weave of the woven/knitted fabric of the present invention is not limited. In the case of a knitted fabric, the weave may be a plain weave, a twill weave, a satin weave, a variation of these weaves, or a mixed weave depending on the intended use. any kind. In order to form a strong texture of the knitted fabric, a plain weave or a plain double-sided weave with many restraint points is preferred. In addition, in order to create a knitted fabric with a sense of expansion and excellent stretchability, a twill weave with moderate restraint points is preferred. In addition, in the case of knitted fabrics, depending on the intended use, the weave may be a plain knit weave of circular knitted fabrics, an interlocking weave, a semi-leno weave of warp knitted fabrics, a satin weave, a jacquard weave, or a variation of these weaves, and Any of mixed structures may be used, but a double rib structure or a corrugated plate structure that is also excellent in bulkiness as a knitted fabric structure is preferred.

The elongation of the knitted/knitted fabric of the present invention is preferably 15% or more in the case of a knitted fabric, more preferably 20% or more. The upper limit is not particularly limited, but considering recovery properties, it is preferably designed to be 50% or less. In addition, in the case of a knitted fabric, the elongation is preferably 35% or more, more preferably 45% or more. In knitted fabrics, the conditions for elongation are not particularly limited, but considering recovery properties, it is preferably 150% or less. By designing the elongation within these ranges, the garment can be made to have high movement tracking properties and excellent wearing comfort when worn.

Next, an example of a method for manufacturing the composite false-twisted yarn and knitted/knitted fabric of the present invention will be described.

[Production method of polyamide fiber] First, regarding the melt spinning of polyamide fiber, the manufacturing method by high-speed direct spinning will be exemplified. In order to set the range of the equilibrium moisture regain or viscosity ratio in the present invention, it is preferable to appropriately select the first polyamide of the core component and the sheath component with reference to the equilibrium moisture regain or relative viscosity of the single-component polyamide fiber. The second polyamide. The selected first polyamide and the second polyamide are melted separately, metered and transported using a gear pump, and a composite flow is directly formed by the usual method to obtain the core-sheath structure, and the eccentric core-sheath type composite fiber is used. The spinning nozzle spurts out. Use a sliver cooling device such as a chimney to blow cooling air on the sprayed polyamide composite fiber sliver, thereby cooling the sliver to 30°C. The oil supply device supplies oil and converges it, and uses a traction roller to rotate at 1500°C. m/min~4000 m/min for traction, and passes through the traction roller and extension roller. At this time, stretching is performed at 1.0 times to 3.0 times according to the ratio of the peripheral speeds of the traction roller and the stretching roller. Furthermore, the yarn is heat-set using a stretching roller and wound into a package at a winding speed of 3000 m/min or more. In addition, a manufacturing method of melt spinning of polyamide composite fiber by high-speed direct spinning will be explained separately below. The first polyamide and the second polyamide are melted separately, measured and transported using a gear pump, and a composite flow is directly formed by the usual method to obtain the core-sheath structure. An eccentric core-sheath type composite fiber spinning nozzle is used to automatically The spinning nozzle spurts out. Use a sliver cooling device such as an air duct to blow cooling air on the sprayed polyamide composite fiber sliver, thereby cooling the sliver to 30°C. The oil supply device supplies oil and converges it, and uses a traction roller to rotate at 1500 m/min. Traction is carried out at ~4500 m/min, and passes through the traction roller and the stretching roller. At this time, micro-stretching is performed at 1.0 times to 1.2 times according to the ratio of the peripheral speeds of the traction roller and the stretching roller. Furthermore, it is wound into a package at a winding speed of 3000 m/min or more.

In particular, the spinning temperature should be appropriately designed based on the melting point of polyamide, which has a relatively high viscosity. When the spinning temperature becomes high, the crystalline portion increases and the equilibrium moisture regain decreases. When the spinning temperature becomes low, the movable amorphous amount tends to increase and the rigid amorphous amount tends to decrease slightly. Therefore, the spinning temperature is preferably 235°C to 270°C, which is higher than the melting point of polyamide, and more preferably 245°C to 260°C. By appropriately setting the spinning temperature, the equilibrium moisture regain and rigid amorphous content of the polyamide composite fiber used in the present invention can be controlled, and the desired thermal shrinkage stress and stretch elongation can be obtained.

Generally, in the case of a parallel type composite cross-section, yarn bending is likely to occur due to the difference in flow speed, and workability is deteriorated. However, by forming an eccentric core-sheath type composite cross-section, the yarn production properties become better, even for single yarn fineness products. Can be easily obtained.

By appropriately designing the draft extension (drawing speed), the balanced moisture regain of the polyamide composite fiber can also be controlled. If the pulling speed is fast, the crystallinity becomes high and the equilibrium moisture regain tends to become small. If the pulling speed is slow, the crystallinity becomes low and the equilibrium moisture regain tends to increase. In addition, the amount of rigid amorphous material increases, and the thermal shrinkage stress and tensile elongation increase. The preferred traction speed is 2500 m/min ~ 4000 m/min.

When a stretched yarn is obtained, the equilibrium moisture regain of the polyamide composite fiber used in the present invention can also be reduced by performing thermal stretching using a traction roller as a heating roller. In addition, the amount of rigid amorphous material increases and the thermal shrinkage stress increases. The extension ratio is preferably 1.1 times to 3.0 times, more preferably 1.3 times to 3.0 times. The thermal extension temperature is preferably 30°C to 90°C, more preferably 40°C to 60°C. In addition, by using the stretching roller as a heating roller to perform heat setting, the heat shrinkage stress of the polyamide composite fiber can be appropriately designed. The preferred heat setting temperature is 130℃～180℃.

In addition, interleaving can also be performed using a known interleaving device in the step before winding. If necessary, the number of interleavings can also be increased by providing multiple interleavings. Furthermore, the oil agent can also be added immediately before winding.

[Composite false twist processing steps] The manufacturing method of the composite false-twisted yarn requires controlling the stretching ratio of the polyamide fiber A and the polyamide fiber B separately. Therefore, it is necessary to use equipment with multiple feed rollers as shown in Figure 1. The method of false twisting is not particularly limited, but it is preferable to use pin type, friction type, belt nip type, etc. to perform false twisting according to the fineness or number of twists. It is especially preferable to use Friction type or belt clamp type with excellent performance.

Here, the manufacturing method of the composite false-twisted yarn of this invention is demonstrated based on FIG. 1.

Polyamide fiber A (A) is fed from the first feed roller (1), polyamide fiber B (B) is fed from the second feed roller (2), and the guide (3) is used. ) After these are merged, the stretching and false twisting process is performed between the heater (4), the cooling plate (5), the twisting machine (6), and the third feed roller (7). At this time, the stretching ratio of polyamide fiber A and polyamide fiber B is controlled by adjusting the speed of the first feeding roller (1) and the second feeding roller (2) respectively. Specifically, the stretching ratio is The polyamide fiber A is set so that the false twist elongation is 30% or more and 45% or less, preferably 30% or more and 40% or less, and the polyamide fiber B is set so that the false twist elongation is 40% or more and 40% or less. 70% or less, preferably 40% or more and 55% or less. By setting the stretch ratio in this range, the strength or crimpability of the composite false-twisted yarn can be fully obtained. In addition, the tension during stretching of the polyamide fiber A becomes relatively high, causing the polyamide fiber A to deviate. The adjacent filament group ratio of the polyamide fiber A can be set to 50% or more in the center of the sliver of the composite false-twisted yarn.

On the other hand, the polyamide fiber B, which has a relatively low tension during stretching, is stretched while being wound around the polyamide fiber A, thereby obtaining a yarn length difference from the polyamide fiber A, and due to the bias, the composite dummy fiber B is The surface of the yarn is twisted, so color unevenness caused by the difference in dyeing between polyamide fiber A and polyamide fiber B is less likely to be seen when dyeing.

In the composite false twist processing, the heater (4) is preferably 150°C or more and 200°C or less, and more preferably 160°C or more and 180°C or less. By setting the heater temperature within this range, strong crimp can be imparted to the composite false-twisted yarn.

In addition, in the case of polyamide fibers, the twist coefficient K is preferably set to a slightly higher value of 26,000 to 33,000. Specifically, in the case of the friction type, it is effective to increase the number of discs or increase the disc speed. In the case of the belt clamp type, it can be achieved by increasing the belt intersection angle or increasing the contact pressure of the belt. Control the twist coefficient K. As an example, in the case of a friction type, it is preferable that the number of disks is 8 or more and the disk speed/yarn speed ratio is 1.5 or more. In the case of a belt clamp type, it is preferable that the belt intersection angle is 100° or more and the belt contact pressure is 1 g/dtex or more. By setting the twist coefficient K in this range, not only the crimpability is improved, but also the number of polyamide fiber B disposed on the outside of the composite false-twisted yarn is increased, so that good softness or leveling properties can be obtained.

Furthermore, it is preferable to perform an interlacing process between the third feed roller (7) and the fourth feed roller (9). It is preferable to use an interlacing nozzle in the interlacing process because the ratio of the adjacent filament groups of the polyamide fiber A can be maintained.

Then, winding is performed using a winding machine (10) to obtain a package of the composite false-twisted yarn.

[Steps for forming braided/knitted fabrics] The woven/knitted fabric of the present invention can be woven and knitted according to known methods. In the case of the knitted fabric, an air-jet loom, a water-jet loom, a rapier loom, a projectile loom, or a shuttle loom can be used. (shuttle loom) etc. for weaving. In the case of knitted fabrics, use a weft knitting machine such as a plain knitting machine, full-fashioned knitting machine, circular knitting machine, computerized jacquard knitting machine, sock knitting machine, cylinder knitting machine, or Tricote ( Tricot warp knitting machine, Raschel warp knitting machine, Milanese loom and other warp knitting machines are used for knitting.

[Dyeing Processing Steps] After the woven/knitted fabric of the present invention is woven or knitted, it is dyed according to a known method. In the present invention, the processes of scouring, relaxing treatment, intermediate heat setting, dyeing processing (narrow sense), and finishing heat setting are collectively referred to as "dyeing processing." Next, an example of the dyeing process step of the present invention will be shown. However, the dyeing process step of the present invention is not limited to the steps or conditions described below, and a known dyeing process step may be used.

An example of dyeing processing steps: Scouring (80°C, 20 minutes, moist heat) → Relaxation treatment (100°C, 30 minutes, damp heat) → Intermediate heat setting (180°C, 1 minute) → Dyeing processing (black, 100°C, 60 minutes )→Finishing heat setting (170℃, 30 seconds). In addition, in the present invention, it is called "dyeing processing step" for convenience, but in any case, as long as it includes a heating step, it is called "dying processing step", scouring, relaxing treatment, intermediate heat setting, dyeing processing (narrow sense), Either of the finishing heat setting can be omitted. In addition, there is no problem even if it is a natural color product without using dye.

In order to obtain sufficient elongation, it is preferable to adjust and control the processing conditions during the dyeing processing step. In dyeing processing steps that use a large amount of water, hot water, or steam, it is especially necessary to control the processing tension. When the processing tension in the warp or weft direction is high, the crimp expression of the fibers in the braided/knitted structure is suppressed in the direction in which the high tension is applied, and the extensibility tends to be reduced. In the dyeing process of woven/knitted fabrics, generally speaking, polyamide fibers swell due to moisture, etc., resulting in reduced quality such as fine lines or deterioration in step passability. Therefore, high tension is applied for processing. In a preferred aspect of the present invention, by using an eccentric core-sheath type polyamide latent crimp yarn as the woven/knitted fabric of the polyamide fiber A, it is possible to suppress deterioration in quality such as fine lines or in step passability. of deterioration. In addition, by controlling the processing tension, sufficient crimp can be expressed after dyeing processing, and high extensibility can be obtained.

The woven/knitted fabric of the present invention can be used for various purposes such as clothing, bedding, bags, sheets, gloves, carpets, surface materials, etc. by utilizing its stretchability, bulkiness, and softness, wherein at least part of it is made of Clothes made of this woven/knitted fabric do not hinder the movement of the body and have excellent feel, so clothes with excellent wearing feel can be obtained. That is, the garment of the present invention contains at least a part of the composite false-twisted yarn of the present invention or the woven/knitted fabric of the present invention that exhibits crimp.

The use of the clothing of the present invention is not limited, and is represented by down jackets, windbreakers, golf wear, rainwear, yoga wear, etc. , casual wear or fashion, underwear (inner) or socks (leg) and other underwear, socks, etc. It is particularly suitable for use in sportswear. [Example]

Next, the present invention will be specifically described based on examples. However, the present invention is not limited to these embodiments. In addition, in the measurement of each physical property, unless otherwise stated, the physical property was measured based on the method mentioned above.

[Measurement method] (1) Relative viscosity 0.25 g of a polyamide chip sample was dissolved into 25 ml of sulfuric acid with a concentration of 98% by mass to obtain 1 g/100 ml, and the flow at a temperature of 25°C was measured using an Ostwald viscometer. Time (T1). Next, the flow time (T2) of only sulfuric acid with a concentration of 98% by mass was measured. Let the ratio of T1 to T2, that is, T1/T2, be the relative viscosity of sulfuric acid.

(2) Balanced moisture regain In accordance with JIS L 1013 8.2 (2021 edition), the equilibrium moisture regain is measured based on the mass obtained by processing for 72 hours in an absolutely dry state at a temperature of 30°C and a relative humidity of 90% RH.

(3) Moisture content rate The moisture content is measured based on JIS L 7251 A method (2002) on a sample set to a relative humidity of 90RH% at a temperature of 23°C and a treatment time of 72 hours.

(4) Total fineness According to JIS L 1013 8.3 (2021). The fiber sample was made into a skein of 200 turns using a gauge machine with a frame circumference of 1.125 m under a tension of 1/30 (g). Dry at 105°C for 60 minutes, move to a desiccator, and leave to cool for 30 minutes at a temperature of 20°C and a relative humidity of 55% RH. Calculate the weight per 10,000 m based on the value obtained by measuring the mass of the skein. quality, and calculate the total fineness of the fiber sliver using the public moisture regain based on JIS L 0105 4.1 (2020). The measurement was performed five times, and the average value was defined as the total fineness.

(5) CR (Telescopic recovery rate) According to JIS L 1013 8.12 (2021).

(6) Interweaving degree (CF value) Using an entanglement tester (Entanglement Tester Type R2072, manufactured by Rothschild Co., Ltd.), the degree of interlacing is determined as follows. With the needle inserted into the yarn, an initial tension of 10 g is applied and it moves at a certain speed of 5 m/min. When the tension reaches the specified value (trip level) at the interlacing point, that is, 15.5 cN The length (spreading length) is measured 30 times, and based on the length obtained by averaging the 30 values (average spread length: mm), the degree of interlacing (CF value) per 1 m of yarn is calculated using the following formula ). Interweaving degree CF=1000/average fiber opening length.

(7) Adjacent filament group ratio of latent crimp yarn The so-called adjacent filament group mentioned in the present invention refers to the case where the total number of single fibers (hereinafter sometimes referred to as single fibers) of the latent crimp yarn in the cross section of the composite false-twisted yarn is set to N. , a collection of adjacent single fibers of N×0.2 or more potentially crimped yarns. The so-called adjacent filament group ratio of potentially crimped yarns refers to the single fibers of potentially crimped yarns that constitute adjacent filament groups. When the total number of fibers is set to Ns, it is represented by Ns/N×100 (%).

If explained using Figure 2, in the cross section of the composite false-twisted yarn (11), a single fiber of the latent crimp yarn (polyamide fiber A) (hereinafter, referred to as a single fiber of the latent crimp yarn) ( The total number (N) of 12) is 11, and the single fibers (12) of the 6 potentially crimped yarns in the adjacent filament group (13) are adjacent and connected, and the number of single fibers satisfies 2.2 or more (11×0.2) . Here, among the adjacent single fibers (14), only two single fibers (12) of the potentially crimped yarn are adjacently connected, and the number of single fibers does not satisfy more than 2.2 (11×0.2), so it is not an adjacent length. Silk group.

In addition, the so-called single fibers are adjacently connected means that there is no agglomeration between any single fiber and the nearest single fiber like the adjacent filament group (13) or the adjacent single fiber (14) in Figure 2. Amide fiber B single fiber (15) and other single fibers. Furthermore, when there are a plurality of adjacent filament groups in the cross section of the composite false-twisted yarn, the total number of single fibers constituting the adjacent filament groups becomes the total number Ns of single fibers constituting the adjacent filament groups.

The counting of single fibers constituting potentially crimped yarns of adjacent filament groups is carried out based on the following image: a composite false-twisted yarn extracted from a woven/knitted fabric after dyeing using an embedding agent such as epoxy resin Embedding, the magnification of more than 10 single fibers can be observed in its cross section using the VE-7800 scanning electron microscope (SEM) manufactured by Keyence, and all single fibers Images taken. The measurement was performed at 10 or more places, and the simple numerical average of the measurement results was rounded off to the first decimal place, and was used as the adjacent filament group ratio of the latent crimp yarn of the yarn bundle being evaluated.

In addition, when the sample is a composite false-twisted yarn, a dyed knitted fabric is produced under the following conditions for evaluation. ・Warp yarn: 56T-48F (N6 extended yarn) ・Weft yarn: Composite false-twisted yarn to be evaluated ・Tissue: 1/3 twill ・Grey fabric density: warp 130 threads/inch (inch), weft 120 threads/inch ※This is the case when the weft yarn is 100 points tex. In the case of different fineness, the coverage coefficient is designed to be the same. Covering coefficient = density (root/inch)/√ (denier (dectex) × 0.9) ・Dyeing processing conditions: Scouring (80°C, 20 minutes, moist heat) → Relaxation treatment (100°C, 30 minutes, damp heat) → Intermediate heat setting (180°C, 1 minute) → Dyeing processing (black, 100°C, 60 minutes) →Finishing heat setting (170℃, 30 seconds).

(8) Yarn length difference The woven/knitted fabric dyed by the conventional method is subjected to humidity control for more than 24 hours in an environment of 20°C and 65RH%, and a yarn of about 5 cm in length is taken out from the woven/knitted fabric so that the fiber itself does not stretch. is broken down into individual yarns with great care. The decomposed single yarns were placed on a scale plate coated with glycerin, and the fiber length was measured with a load of 0.11 cN/dtex applied. The average length of the single yarn group with a relatively short fiber length was set to La. Let Lb be the average length of the single yarn group with a relatively long fiber length, and calculate it using the following equation. All single yarns constituting the composite mixed fiber are classified into any single yarn group according to fiber length. Conduct 20 tests and round the average value to one decimal place in accordance with Rule B (rounding method) of JIS Z 8401 (2019). In addition, when the sample is a composite false-twisted yarn, a dyed knitted fabric is produced and used for evaluation in the same manner as in item (7). ・Yarn length difference (%) ={(Lb-La)/La}×100.

(9) Difference in elongation The woven/knitted fabric dyed by the conventional method is subjected to humidity control for more than 24 hours in an environment of 20°C and 65RH%, and a yarn of about 30 cm in length is taken out from the woven/knitted fabric so that the fiber itself does not stretch. is broken down into individual yarns with great care. According to the constant speed elongation conditions shown in the test according to the JIS L 1013 (2010) 8.5.2 standard, a Tensilon tensile testing machine was used to test the specimen with a sample length of 20 cm and a tensile speed of 20 cm/min starting from the initial load of 0.1 cN. /dtex is stretched until it breaks, and the elongation of each single yarn is calculated based on the elongation at the highest load. Let the average elongation of the single yarn group with relatively low elongation be Sa, and let the average elongation of the single yarn group with relatively high elongation be Sb, and be calculated by the following equation. All single yarns constituting the composite mixed fiber are classified into any single yarn group according to elongation. Conduct 20 tests and round the average value to one decimal place in accordance with Rule B (rounding method) of JIS Z 8401 (2019). In addition, when the sample is a composite false-twisted yarn, a dyed knitted fabric is produced and used for evaluation in the same manner as in item (7). ・Difference in elongation (%)=Sb-Sa.

(10)Single yarn fineness Except that the sample length is set to 10 cm, it is based on JIS L 1013 8.3B method (2010).

(11) Elongation According to JIS L 1096 8.16 (2010). Regarding the braided fabric, according to method B (constant load method for braided fabrics), the elongation rate was calculated from the length after holding for 1 minute at a clamping interval of 500 mm and a load of 14.7 N. In addition, regarding the knitted fabric, the elongation was calculated based on the length after stretching to 14.7 N at a stretching speed of 100 mm/min and holding for 1 minute by the grab method based on the D method (constant load method for knitted fabrics).

(12) Operability The operability of the composite false-twisted yarn or composite mixed fiber yarn of the Examples and Comparative Examples was determined based on the number of yarn breaks per 24 hours with 108 spindles. Evaluation is conducted according to the following five stages, and the average of the evaluation scores is rounded to one decimal place. A score of 3 or more points was considered good operability. 5 points: less than 3 times 4 points: more than 3 times and less than 5 times 3 points: more than 5 times and less than 7 times 2 points: more than 7 times and less than 10 times 1 point: more than 10 times.

(13) Even dyeing Through the visual inspection of skilled technicians (5 people), the level dyeing properties of woven/knitted fabrics are evaluated according to the following five stages, and the average value of each technician's evaluation score is rounded to one decimal place. A score of 3 or more was regarded as good uniformity. In addition, when the sample is a composite false-twisted yarn, a dyed knitted fabric is produced and used for evaluation in the same manner as in item (7). 5 points: very good 4 points: excellent 3 points: Slightly excellent 2 points: slightly worse 1 point: Poor.

(14) Softness The softness of knitted/knitted fabrics is evaluated according to the following 5 levels through the touch of skilled technicians (5 people), and the average of the evaluation scores of each technician is rounded to one decimal place. A score of 3 or more was considered to have good softness. In addition, when the sample is a composite false-twisted yarn, a dyed knitted fabric is produced and used for evaluation in the same manner as in item (7). 5 points: very good 4 points: excellent 3 points: Slightly excellent 2 points: slightly worse 1 point: Poor.

(15) Fluffiness The swelling degree of knitted/knitted fabrics was evaluated according to the following five stages through the touch of skilled technicians (5 people), and the average of the evaluation scores of each technician was rounded to one decimal place. A score of 3 points or more was regarded as a good degree of expansion. In addition, when the sample is a composite false-twisted yarn, a dyed knitted fabric is produced and used for evaluation in the same manner as in item (7). 5 points: very good 4 points: excellent 3 points: Slightly excellent 2 points: slightly worse 1 point: Poor. [Example 1]

As polyamide fiber A (hereinafter sometimes referred to as "fiber A"), resin (1): nylon 6 (relative viscosity 3.32) and resin (2): nylon 610 (relative viscosity 2.71) are melted separately, and an eccentric core is used Sheath type composite fiber spinning nozzle (24 holes, round hole), resin (1): nylon 6 (relative viscosity 3.32) is arranged in the core, and resin (2): nylon 610 (relative viscosity 2.71) is made into a sheath The resin is melt-sprayed at a composite ratio (mass ratio) of 5:5 of nylon 6 (relative viscosity 3.32) and nylon 610 (relative viscosity 2.71) (spinning temperature 270°C). For the yarn ejected from the spinning nozzle, the yarn cooling device is used to cool and solidify the yarn, and the oil supply device is used to supply the water-containing oil agent, and the fluid interweaving nozzle device is used to impart interweaving, and then the traction roller (room temperature 25°C ) is pulled at 3700 m/min, stretched between stretching rollers (room temperature 25°C) at 1.1 times, and then wound into a package at a winding speed of 4000 m/min to obtain a total winding fineness of 70 decitex , polyamide latent crimp yarn (polyamide fiber A) with 24 filaments and 60% elongation.

In addition, as the polyamide fiber B (hereinafter sometimes referred to as "fiber B"), nylon 6 (relative viscosity 2.63) was melted and melt-blasted using a 68-hole, round-hole spinning nozzle (spinning temperature: 270°C). The yarn sliver ejected from the spinning nozzle was wound into a package in the same manner as fiber A, and a polyamide fiber B with a total fineness of 44 decitex, a number of filaments of 68, and an elongation of 60% was obtained.

For the obtained fiber A and fiber B, the twisting machine shown in Figure 1 is a belt-clamp type false twisting machine, and the heater temperature is 170°C, the twist coefficient during false twisting K=31000, and the elongation ratio of fiber A. 1.250, the elongation ratio of fiber B is 1.100, the fluid treatment nozzle (interweaving nozzle) performs composite false twist processing at an interweaving pressure of 0.2 MPa, and a composite false twist processed yarn with a total fineness of 100 decitex and a number of filaments of 92 is obtained.

The composite false-twisted yarn is used to make a double rib structure, and the scouring and dyeing processes are carried out through liquid flow scouring and liquid flow dyeing. The dry heat setting (intermediate heat setting and finishing heat setting) of the fabric before and after the dyeing process is appropriately adjusted. , to obtain knitted fabrics with excellent stretchability, bulkiness and softness. Table 1 shows the characteristics of the composite false-twisted yarn and knitted fabric.

[Example 2] The composite false-twisted yarn of Example 1 was used for the warp and weft yarns to produce a plain double-sided structure, and the dyeing process was performed in the same manner as in Example 1 to obtain a knitted fabric excellent in stretchability, bulkiness, and softness. Table 1 shows the characteristics of the composite false-twisted yarn and knitted fabric.

[Example 3] Stretchability, bulkiness, and softness were obtained by the same method as in Example 1, except that the resin (2) of the polyamide latent crimp yarn (polyamide fiber A) was nylon 6 (relative viscosity 2.63). Excellent knitted fabric. Table 1 shows the characteristics of the composite false-twisted yarn and knitted fabric.

[Example 4] A knitted fabric excellent in stretchability, bulkiness, and softness was obtained by the same method as in Example 1, except that the stretch ratio of the polyamide fiber B during the composite false twist processing was set to 1.230. Table 1 shows the characteristics of the composite false-twisted yarn and knitted fabric.

[Example 5] A knitted fabric excellent in stretchability, bulkiness, and softness was obtained in the same manner as in Example 1, except that the stretch ratio of the polyamide fiber B during the composite false twist processing was set to 1.000. Table 1 shows the characteristics of the composite false-twisted yarn and knitted fabric.

[Example 6] A knitted fabric excellent in stretchability, bulkiness, and softness was obtained in the same manner as in Example 5, except that the draw ratio of the polyamide fiber B during melt spinning was increased to 40%. Table 1 shows the characteristics of the composite false-twisted yarn and knitted fabric.

[Example 7] A knitted fabric excellent in stretchability, bulkiness, and softness was obtained by the same method as in Example 1, except that the spinning nozzle of the polyamide fiber B during melt spinning was set to 36 holes. Table 1 shows the characteristics of the composite false-twisted yarn and knitted fabric.

[Comparative example 1] A knitted fabric was obtained in the same manner as in Example 1, except that polyamide latent crimp yarn (polyamide fiber A) was used instead of polyamide fiber B, and the stretch ratio during false twisting was set to 1.250. Although the obtained product was excellent in extensibility, it was poor in bulkiness or expansion. Table 2 shows the characteristics of the composite false-twisted yarn and knitted fabric.

[Comparative example 2] The polyamide latent crimp yarn (polyamide fiber A) described in Example 1 was stretched at a heater temperature of 170° C. at a stretching ratio of 1.250, and the polyamide fiber B was stretched at a stretching ratio of 1.100. The obtained stretched yarn was introduced into a fluid treatment nozzle at an overfeed rate of 11.0% for the polyamide fiber B relative to the polyamide latent crimp yarn (polyamide fiber A), to obtain a composite mixture subjected to fluid turbulence processing. Fiber processing yarn. The obtained composite mixed fiber processed yarn was knitted and dyed in the same manner as in Example 1. In the obtained knitted fabric, the adjacent filament group ratio of the latent crimp yarn was low, so crimp was not fully expressed, and the extensibility, bulkiness, and softness were poor. The characteristics of composite mixed fiber processed yarn and knitted fabric are shown in Table 2.

[Comparative example 3] Polytrimethylene terephthalate with an ultimate viscosity of 1.31 and polyethylene terephthalate with an ultimate viscosity of 0.52 were melted independently, and at a spinning temperature of 260°C, from a 24-hole eccentric core-sheath type The composite fiber spinning nozzle (24 holes, round hole) is ejected so that the weight ratio of polyethylene terephthalate/polytrimethylene terephthalate becomes 50/50, and the spinning speed is 1400 m /min to obtain an unextended yarn with a total fineness of 165 decitex and a filament count of 24. Furthermore, a hot roller-hot plate stretching machine was used to stretch with a hot roller temperature of 70°C, a hot plate temperature of 145°C, and a draw ratio of 3.0 to obtain a total fineness of 56 decitex, a number of filaments of 24, and an elongation of 40%. Polyester latent crimp yarn.

Knitting and dyeing were performed in the same manner as in Example 1, except that fiber A was the polyester latent crimp yarn and the stretch ratio of fiber A in the composite false twist processing was 1.100. The obtained knitted fabric uses different raw materials such as polyamide and polyester, so it is difficult to stably produce a composite false-twisted yarn and has poor extensibility or level dyeing properties. Table 2 shows the characteristics of the composite false-twisted yarn and knitted fabric. Since the ultimate viscosity is measured instead of the relative viscosity, the terms of relative viscosity and viscosity ratio are set to "-". The same is true for Comparative Example 4.

[Comparative example 4] Polyethylene terephthalate with an ultimate viscosity of 0.65 is melted, and a 68-hole, round-hole spinning nozzle is used for melt ejection (spinning temperature: 285°C). For the yarn ejected from the spinning nozzle, the yarn cooling device is used to cool and solidify the yarn, and the oil supply device is used to supply oil, and the fluid interweaving nozzle device is used to impart interweaving, and then the traction roller (room temperature 25°C) is used It was pulled at 2300 m/min and wound into a package at a winding speed of 2300 m/min to obtain a partially oriented polyester fiber with a total fineness of 84 decitex, a number of filaments of 96, and an elongation of 130%.

Knitting and dyeing were performed in the same manner as in Comparative Example 3 except that fiber B was the partially aligned polyester fiber. The resulting knitted fabric contains polyester with high rigidity and therefore has poor softness. Table 2 shows the characteristics of the composite false-twisted yarn and knitted fabric.

[Table 1] [Table 1] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Original yarn Fiber A Variety 70T-24F 70T-24F 70T-24F 70T-24F 70T-24F 70T-24F 70T-24F profile Eccentric core sheath Eccentric core sheath Eccentric core sheath Eccentric core sheath Eccentric core sheath Eccentric core sheath Eccentric core sheath Resin (1) composition Nylon 6 Nylon 6 Nylon 6 Nylon 6 Nylon 6 Nylon 6 Nylon 6 relative viscosity 3.32 3.32 3.32 3.32 3.32 3.32 3.32 Moisture content 7.80% 7.80% 7.80% 7.80% 7.80% 7.80% 7.80% Resin(2) composition Nylon 610 Nylon 610 Nylon 6 Nylon 610 Nylon 610 Nylon 610 Nylon 610 relative viscosity 2.71 2.71 2.63 2.71 2.71 2.71 2.71 Moisture content 3.30% 3.30% 7.80% 3.30% 3.30% 3.30% 3.30% Viscosity ratio 1.23 1.23 1.26 1.23 1.23 1.23 1.23 equilibrium moisture regain 5.7% 5.7% 7.7% 5.7% 5.7% 5.7% 5.7% Fiber B Variety 44T-68F 44T-68F 44T-68F 44T-68F 44T-68F 44T-68F 44T-36F composition Nylon 6 Nylon 6 Nylon 6 Nylon 6 Nylon 6 Nylon 6 Nylon 6 Elongation (%) 60 60 60 60 60 40 60 Processing conditions Fiber A Extension ratio 1.250 1.250 1.250 1.250 1.250 1.250 1.250 Fiber B Extension ratio 1.100 1.100 1.100 1.230 1.000 1.000 1.100 Composite processing yarn Composite processing method false twist false twist false twist false twist false twist false twist false twist CR(%) 30.7 30.7 24.0 30.5 30.8 30.5 30.4 fabric design organization double rib Double sided weave double rib double rib double rib double rib double rib characteristic Yarn length difference (%) 10.7 10.7 10.5 5.0 22.0 20.0 11.0 Adjacent filament group ratio of latent crimp yarn (%) 80 80 80 65 83 70 81 Elongation difference (%) 11.4 11.4 11.4 5.0 23.0 2.0 11.7 Single yarn fineness (dectex) Fiber A 2.33 2.33 2.33 2.33 2.33 2.33 2.33 Fiber B 0.59 0.59 0.59 0.53 0.65 0.65 1.11 Elongation (%) vertical 55 twenty two 37 56 54 56 56 horizontal 119 26 60 120 119 120 115 operability 5 5 5 5 3-4 4 5 Even dyeing 5 5 5 3 4-5 3 4-5 Softness 5 5 4 4 5 4 3 Fluffiness 5 5 4 3 5 4 4

[Table 2] [Table 2] Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 Original yarn Fiber A Variety 70T-24F 70T-24F 70T-24F 70T-24F profile Eccentric core sheath Eccentric core sheath Eccentric core sheath Eccentric core sheath Resin (1) composition Nylon 6 Nylon 6 PPT PPT relative viscosity 3.32 3.32 - - Moisture content 7.80% 7.80% 0.40% 0.40% Resin (2) composition Nylon 610 Nylon 610 PET PET relative viscosity 2.71 2.71 - - Moisture content 3.30% 3.30% 0.40% 0.40% Viscosity ratio 1.23 1.23 - - equilibrium moisture regain 5.7% 5.7% 0.4% 0.4% Fiber B Variety 44T-68F 44T-68F 84T-96F composition Nylon 6 Nylon 6 PET Elongation (%) 60 60 130 Processing conditions Fiber A Extension ratio 1.250 1.250 1.100 1.100 Fiber B Extension ratio 1.250 1.100 1.100 1.100 Composite processing yarn Composite processing method false twist Mixed fiber false twist false twist CR (%) 33.3 20.9 25.7 30.7 fabric design organization double rib double rib double rib double rib characteristic Yarn length difference (%) 0.0 11.0 15.0 20.0 Adjacent filament group ratio of latent crimp yarn (%) 100 20 80 77 Elongation difference (%) 0.0 12.0 18.0 60.0 Single yarn fineness (dectex) Fiber A 2.33 2.33 2.65 2.65 Fiber B 2.33 0.65 0.65 0.80 Elongation (%) vertical 60 30 33 36 horizontal 125 78 68 75 operability 5 5 3 3 Even dyeing 5 4 1 3 Softness 2 2 3 2 Fluffiness 2 2 3 3

A:Polyamide fiber A B:Polyamide fiber B 1: First feed roller 2: Second feed roller 3: Guide 4: Heater 5:Cooling plate 6:Twisting machine 7:Third feed roller 8: Fluid handling nozzle 9:Fourth feed roller 10: Coiler 11: Composite false twist processed yarn 12: Single fiber of latent crimp yarn (polyamide fiber A) 13: Adjacent filament group 14: Adjacent single fibers 15: Single fiber of polyamide fiber B

Fig. 1 is a schematic diagram of the manufacturing process of the composite false-twisted yarn of the present invention. FIG. 2 is an example of a schematic cross-sectional view of the fiber cross section of the composite false-twisted yarn of the present invention.

11: Composite false twist processed yarn

12: Single fiber of latent crimp yarn (polyamide fiber A)

13: Adjacent filament group

14: Adjacent single fibers

15: Single fiber of polyamide fiber B

Claims (7)

A composite false-twisted yarn, including polyamide fiber A and polyamide fiber B. The polyamide fiber A is a latent crimp yarn, the polyamide fiber B is not a latent crimp yarn, and the polyamide fiber B is not a latent crimp yarn. The adjacent filament group ratio of the amide fiber A is 50% or more. The composite false-twisted yarn according to claim 1, wherein the elongation difference between the polyamide fiber A and the polyamide fiber B is 7.0% or more and 40.0% or less. The composite false-twisted yarn according to claim 1, wherein the single yarn fineness of the polyamide fiber B is 0.3 decitex or more and 0.9 decitex or less. The composite false-twisted yarn according to claim 1, wherein the polyamide fiber A is an eccentric core-sheath type composite fiber with an equilibrium moisture regain of 6.3% or less, and the polyamide constituting the core component and the polyamide constituting the sheath component The viscosity ratio of amide is 1.20 or more and 1.40 or less. A woven/knitted fabric containing at least a part of the composite false-twisted yarn according to any one of claims 1 to 4 showing crimp. Clothing including at least a part of the composite false-twisted yarn according to any one of claims 1 to 4 that exhibits crimp. A garment comprising, at least in part, the woven/knitted fabric of claim 5.

Images