JP2019214798A - Woven or knitted fabric using eccentric core-sheath conjugate fiber - Google Patents

Abstract

To provide a woven or knitted fabric having high stretch performance and high abrasion resistance, having uniform appearance free from wrinkles and streaks, and having smooth and delicate texture.SOLUTION: A woven or knitted fabric is obtained by using at least partially an eccentric sheath-core conjugate fiber. In a cross section of the eccentric core-sheath conjugate fiber composed of two kinds of polymers of A component and B component, the A component is completely covered with the B component, and a ratio S/D of a minimum thickness S of the B component covering the A component and a fiber diameter D is 0.01 to 0.1, and a peripheral length of the fiber in a portion where the thickness of the B component is 1.05 times or less of the minimum thickness S is 1/3 or more of a peripheral length of the whole fiber.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a woven or knitted fabric using an eccentric core-sheath composite fiber.

  Fibers using thermoplastic polymers such as polyesters and polyamides have various excellent properties such as mechanical properties and dimensional stability. Therefore, they are used in various fields such as clothing, interiors, vehicle interiors, and industrial materials. On the other hand, as the uses of fibers are diversified, their required characteristics are also becoming diversified.

  In particular, in recent years, there has been a demand for suppression of a feeling of binding when worn and followability of the movement, and there is a high demand for stretch performance including clothes. As additional functions, complex functions such as aesthetics, texture, lightness, bulkiness, and coloring are required, and the texture, which is a characteristic of fine fineness yarns, is particularly aesthetic, smooth, and soft. Demands are high. Various methods have been proposed so far for imparting a stretch to the yarn constituting the woven or knitted fabric. For example, there is a method in which fibers are subjected to false twisting to impart stretchability to a woven or knitted fabric. However, the woven fabric obtained thereby does not have sufficient stretchability.

  Further, there is a method in which polyurethane-based fibers having rubber elasticity are mixed in a woven fabric to impart stretchability. However, there are problems such as poor color fastness, easy discoloration and color transfer, heavy fabric weight, too thick fabric, and deterioration in strength over time.

  As a method that does not use a polyurethane fiber or a false twisted yarn, a woven or knitted fabric of latently crimp-expressing fiber using a side-by-side composite yarn has been proposed. Latent crimp-expressing fibers are fibers that have the ability to develop crimps by heat treatment or have finer crimps than before heat treatment. And the like.

  For example, Patent Document 1 proposes a latently crimpable conjugate fiber composed of a conjugate fiber in which two-component polymers having different viscosities are bonded in a side-by-side type. If such a latently crimpable conjugate fiber is used, the fiber will be greatly bent to the high shrinkage component side after the heat treatment, and a continuous three-dimensional spiral structure is obtained. Therefore, the structure can be stretched and contracted like a spring, so that the woven or knitted fabric can have stretchability. Since these side-by-side type conjugate fibers have a special yarn cross section, spinning is difficult, and it is difficult to reduce the single yarn fineness. Therefore, in the woven or knitted fabric obtained from the fiber having the bimetal structure, there is a problem that the texture is hard.

  Furthermore, in Patent Literature 1, there is a problem that peeling occurs at the interface due to friction and impact due to the simple lamination structure, and the position of the woven or knitted article is reduced due to a white streak-like whitening phenomenon or fluffing. there were.

  Patent Document 2 proposes a tangible crimpable conjugate fiber in which the position of the center of gravity of the second component is shifted from the position of the center of gravity of the fiber in the fiber cross section of the conjugate fiber containing the first component and the second component. In the fiber having such a cross section, the yarn bending at the time of ejection in the spinning process can be suppressed, but the difference in viscosity between the two sides in the fiber cross section has to be reduced due to restrictions on the composite spinning method, so it is manifested. Crimps tend to be inferior to side-by-side latent or actual crimpable conjugate fibers. Therefore, crimping in a simple eccentric core-sheath composite fiber is inferior in essential stretch performance, and it is difficult to say that the material has satisfactory stretch performance. In addition, there is a problem that crimp spots and streak spots are generated due to crimp spots due to slight misalignment of the position of the eccentric core component. Furthermore, when the eccentric core-sheath composite fiber is made fine, there is a problem that the stretching performance is further inferior.

Japanese Patent Application Laid-Open No. 09-157941 (Claims) JP-A-2006-106188 (Claims) JP-A-2002-339169 (Claims) JP-A-2002-061031 (Claims)

  The present invention relates to a high-quality woven or knitted material that overcomes the problems of the prior art, has sufficient stretch performance and softness, and has no grain or streaks.

The above problem is solved by the following means.
(1) In the cross section of the eccentric core-sheath conjugate fiber composed of two kinds of polymers of the component A and the component B, the component A is completely covered with the component B, and the thickness of the component B covering the component A is the minimum. The ratio S / D of the thickness S to the fiber diameter D is 0.01 to 0.1, and the perimeter of the fiber in a portion whose thickness is within 1.05 times the minimum thickness S is 1 / the perimeter of the entire fiber. A woven or knitted fabric using at least a part of three or more eccentric core-sheath composite fibers.
(2) In the cross section of the false twisted eccentric sheath-core composite fiber composed of two kinds of polymers of the A component and the B component, the A component is completely covered with the B component, and covers the A component. The ratio S / D of the minimum thickness S of the component B to the fiber diameter D is 0.01 to 0.2, and the circumference of the fiber whose thickness is within 1.10 times the minimum thickness S is the entire fiber. A woven or knitted fabric using at least a part of an eccentric core-sheath conjugate fiber having a length equal to or longer than 1/3 of the circumference of the woven fabric.
(3) The woven or knitted fabric according to (1) or (2), wherein the eccentric core-sheath conjugate fiber has a stretch ratio of 20 to 70%.
(4) The woven or knitted fabric according to any one of (1) to (3), wherein the eccentric core-sheath composite fiber has a single yarn fineness of 1.0 dtex or less and a fineness unevenness (U%) of 1.5% or less.
(5) The woven or knitted fabric according to any one of (1) to (4), wherein the elongation percentage under a load of 1.5 kgf (14.7 N) in at least one of the warp direction and the weft direction is 15% or more.
(6) The woven or knitted fabric according to any one of (1) to (5), wherein an elongation recovery rate under a load of 1.5 kgf (14.7 N) in at least one of the warp direction and the weft direction is 75% or more.
(7) The woven or knitted fabric according to any one of (1) to (6), wherein the abrasion strength (JIS L 1096 E method, third-class discoloration) is 2000 times or more.
(8) The woven or knitted fabric according to any one of (1) to (7), wherein the eccentric core-sheath conjugate fiber does not contain a sea-island eluting component.
(9) The woven or knitted fabric has a ventilation rate of 1 cc / cm ² / sec. The woven or knitted fabric according to any one of (1) to (8), which is the following woven fabric.
(10) The woven or knitted fabric has an air permeability of 30 cc / cm ² / sec. The woven or knitted fabric according to any one of (1) to (8), which is the following knitted fabric.
(11) The woven or knitted fabric according to any one of (1) to (9), which has a water pressure resistance of 1000 mmH ₂ O (9.8 kPa) or more.
(12) The woven or knitted fabric according to any one of (1) to (11), wherein the eccentric core-sheath conjugate fiber is contained in the woven or knitted fabric in an amount of 25% by weight or more.
(13) Water absorption time is 5 sec. A woven or knitted fabric according to any one of the following (1) to (8) and (12).

  By using the eccentric core-sheath conjugate fiber defined in the present invention, it is possible to provide a high-quality woven or knitted fabric having sufficient stretchability, softness, and further, free of embossing or streaks. This woven or knitted fabric can be applied to a wide range of fields including clothing, clothing materials, and industrial materials, and can be efficiently manufactured at low cost.

FIG. 1 is a photograph substituted for a drawing showing an example of a fiber cross section of the eccentric core-sheath composite fiber of the present invention. FIG. 2 is an example of the eccentric core-sheath conjugate fiber of the present invention, and is a cross-sectional view of the fiber for explaining the position of the center of gravity in the fiber cross section. FIG. 3 is a fiber cross section for explaining the fiber diameter (D) and the minimum thickness (S) in the fiber cross section of the eccentric core-sheath composite fiber and the composite yarn of the present invention. FIG. 4 is a fiber cross section for explaining IFR (the radius of curvature of the interface between the A component and the B component in the fiber cross section) in the fiber cross section of the eccentric core-sheath composite fiber of the present invention.

  Hereinafter, the present invention will be described in detail with preferred embodiments.

  The eccentric core-sheath conjugate fiber used in the present invention has a fiber cross section composed of two kinds of polymers of component A and component B. As the polymer mentioned here, a fiber-forming thermoplastic polymer is suitably used. In view of the object of the present invention, as the combination of the component A and the component B, (1) a combination of polymers that causes a difference in shrinkage when subjected to a heat treatment, and (2) a melt viscosity difference of the combined polymers is 10 Pa · s or more. Combinations of polymers with different molecular weights and / or compositions are preferred.

  Suitable polymers for achieving the objects of the present invention include polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyamide, polylactic acid, thermoplastic polyurethane, polyphenylene sulfide, polyethylene, and polypropylene.

  When the component A and the component B are used in combination having different molecular weights, the molecular weight of the polymer to be used, such as the suitable polymer exemplified above, is changed, and the high molecular weight polymer is used for the component A shown in FIG. Polymers can be used. When different compositions are combined for the A component and the B component, one component can be used as a homopolymer and the other component can be used as a copolymer.

  In addition, combinations having different polymer compositions include, for example, polybutylene terephthalate / polyethylene terephthalate, polytrimethylene terephthalate / polyethylene terephthalate, thermoplastic polyurethane / polyethylene terephthalate, and polytrimethylene terephthalate / polybutylene terephthalate in component A / B. Various combinations are included. In these combinations, good bulkiness due to the spiral structure can be obtained.

  Particularly, polyester, polyamide, polypropylene and the like are preferably used, and among them, polyester is more preferable because it also has mechanical properties and the like. As the polyester referred to herein, polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, or those obtained by copolymerizing a dicarboxylic acid component, a diol component or an oxycarboxylic acid component, or those obtained by blending these polyesters are preferable. No.

  In these polymers, as long as the object of the present invention is not impaired, matting agents such as titanium oxide, flame retardants, lubricants, antioxidants, coloring pigments and the like, inorganic fine particles and organic compounds, carbon black as required. It can be contained.

  In the eccentric core-sheath conjugate fiber of the present invention, the composite area ratio of the A component and the B component in the fiber cross section is finer by increasing the ratio of the high shrinkage component as the A component or the high molecular weight polymer in view of the appearance of crimp. A simple spiral structure can be easily realized. In order to further improve the physical properties of the eccentric core-sheath composite fiber, the ratio of the two components is preferably in the range of A component: B component = 70: 30 to 30:70 (area ratio), and 65:35 to 45. : 55 is more preferable.

  In the present invention, the eccentric core-sheath composite fiber used has a composite cross section in which two different polymers are bonded, and the two types of polymers having different polymer characteristics are bonded without being substantially separated. It is an eccentric core-sheath type in which the A component completely covers the B component.

  Here, the eccentricity in the present invention means that the position of the center of gravity of the A component polymer is different from the center of the cross section of the composite fiber in the cross section of the composite fiber. Hereinafter, a specific description will be given with reference to FIG. In FIG. 2, the horizontal hatching is the B component, the 30 deg hatching (oblique line rising to the right) is the A component, the center of gravity of the A component in the cross section of the composite fiber is the center of gravity a, and the center of gravity of the cross section of the composite fiber is the center of gravity C It is.

  In the eccentric core-sheath conjugate fiber used in the present invention, since the center of gravity a is separated from the center of gravity C of the cross section of the conjugate fiber (eccentricity), the fiber can be largely curved to the high shrinkage component side after the heat treatment. The eccentric core-in-sheath conjugate fiber continues to bend in the fiber axis direction as the high shrinkage component shrinks relatively more strongly than the low shrinkage component. As a result, the eccentric core-sheath composite fiber has a three-dimensional spiral structure, and excellent crimps are developed. Here, as the position of the center of gravity is farther away, better crimps are developed, and good stretch performance is obtained.

  In the present invention, since the component A completely covers the component B, even if friction or impact is applied to the woven or knitted material, a whitening phenomenon or fluffing does not occur, so that the woven or knitted article can be maintained. In addition, a high molecular weight polymer, a high elasticity polymer, or the like that is exposed on the surface and becomes a defect of the conjugate fiber in the conventional simple bonding structure can also be used as one component of the conjugate fiber.

  Furthermore, in the case of a side-by-side type composite yarn, as the single yarn fineness is reduced, the spinning operability is poor, and the single yarn fineness is limited to about 1.2 dtex. However, due to the structure in which the component A completely covers the component B, the spinnability is improved, and the single-fiber fineness can be made smaller than 1.0 dtex.

  The eccentric core-sheath conjugate fiber used in the present invention has a ratio S / D of the minimum thickness S of the B component covering the A component to the fiber diameter (diameter of the conjugate fiber) D of 0.01 to 0.1. And preferably 0.02 to 0.08.

  Within this range, it is possible to suppress a decrease in the position of the woven or knitted article due to fluff or the like, and it is possible to obtain sufficient crimping force and stretch performance. Here, the crimped yarn can obtain good stretch performance by the fact that each polymer is in contact only at the bonding interface, and if the high shrinkage component is covered with the low shrinkage component, the stretch performance will be poor. descend. However, as a result of intensive studies by the present inventors, it has become possible to obtain a conjugate fiber that satisfies both properties of stretch performance and abrasion resistance by setting the thickness of the B component within the range specified in the present invention. .

  This will be described in more detail using the fiber cross section shown in FIG. Here, the thinnest part of the B component in the core-sheath conjugate fiber is the minimum thickness S.

  Further, it is important that a portion having a thickness within 1.05 times the minimum thickness S (hereinafter, also referred to as a “minimum thickness portion”) occupies at least の of the entire perimeter of the composite fiber. This means that the A component exists along the contour of the fiber. Compared with the conventional eccentric core-sheath composite fiber having the same area ratio, the present invention shows that the center of gravity of each component is The positions are farther apart, forming fine spirals, and exhibiting good crimp.

  More preferably, by setting the perimeter of a thickness within 1.05 times the minimum thickness S to be not less than 2/5 of the perimeter of the entire fiber, good stretch performance without crimp spots can be obtained. Furthermore, since the spiral structure of each fiber at the time of crimping becomes even, it is possible to obtain sufficient stretching performance without unevenness of fineness, smooth and delicate with good appearance without embossing or streaks It is possible to obtain a textured woven or knitted fabric.

Further, when the radius of curvature IFR at the interface between the A component and the B component in the fiber cross section is a value R obtained by dividing the fiber diameter D by 2, it is preferable that the following formula 1 is satisfied. The radius of curvature IFR referred to here is, as shown in FIG. 4, a circle (dashed line) in contact with the curvature of the interface between the component A and the component B, which is the maximum thickness of the component B covering the component A in the cross section of the fiber. ) Indicates the radius.
(IFR / R) ≧ 1 (Equation 1)

  This means that the interface is closer to a straight line. The present invention provides a high crimp that could not be achieved with the conventional eccentric core-sheath conjugate fiber by making the interface between the component A and the component B close to a straight line in a form close to the cross section of the conventional laminated crimped yarn. It is preferable because it can be expressed. More preferably, it is 1.2 or more.

  The minimum thickness S and the fiber diameter D, the radius of curvature IFR of the interface, and the area ratio at which the thickness of the component B covering the component A is minimum are not particularly limited, but are obtained, for example, as follows. be able to.

  That is, a multifilament composed of an eccentric core-sheath composite fiber is embedded with an embedding agent such as an epoxy resin, and a cross section in a direction perpendicular to the fiber direction is ten or more (transmission) with a transmission electron microscope (TEM). An image is taken at a magnification that allows observation of the fibers. At this time, the metal dyeing makes it possible to clarify the contrast at the junction between the A component and the B component by utilizing the difference in dyeing between the polymers. A circle circumscribing the cross section is set for the cross section of a single yarn of 10 eccentric core-sheath conjugate fibers randomly extracted from the photographed images in the same image, and the diameter of the circumscribed circle is measured. The calculated value corresponds to the fiber diameter D in the present invention. The circle circumscribed in the transverse section referred to here is a cross section perpendicular to the fiber axis from an image taken two-dimensionally as a cut surface, and a perfect circle circumscribed most at two or more points on this cut surface. The circular diameter means the diameter of the perfect circle. Further, using the image obtained by measuring the fiber diameter D, the value obtained by measuring the minimum thickness of the component B covering the component A for 10 or more fibers (points) is the minimum thickness S referred to in the present invention. Equivalent to. Further, the fiber diameter D, the minimum thickness S, and the curvature radius IFR are measured in units of μm, and rounded to the third decimal place. With respect to ten images obtained by performing the above operations, a simple number average value of measured values and a ratio (S / D) thereof is obtained. The area ratio is determined by calculating the area of the entire fiber and the areas of the A component and the B component using the image photographed above and the image analysis software “WinROOF2015” manufactured by Mitani Corporation.

  In the cross section of the eccentric core-sheath conjugate fiber of the present invention, the deformation of the cross section by false twisting also occurs in the present eccentric core-sheath conjugate fiber as in the case of the conventional fiber. In the case where the eccentric core-sheath composite fiber is subjected to false twisting, since the dispersion increases due to the false twisting, S / D represented by S, D, and the thickness around the minimum thickness S in the eccentric core-sheath composite fiber, The feature about the thickness around S changes slightly. The same effect can be obtained even with such a change.

  That is, when the above-mentioned eccentric core-sheath composite fiber is false-twisted, the false twisted yarn has the component A completely covered with the component B, the minimum thickness S of the component B covering the component A, and the fiber diameter D. When the ratio S / D is 0.01 to 0.2, preferably 0.01 to 0.10, a stable stretch with less unevenness, particularly in the longitudinal direction of the fiber, can be obtained.

  In addition, the peripheral length of the fiber in a portion whose thickness is 1.1 times or less than the minimum thickness S needs to be 1/3 or more of the peripheral length of the entire fiber, and more preferably, 1.03 times or less of the minimum thickness S. By making the peripheral length of the thickness 2/5 or more of the peripheral length of the whole fiber, there is no crimp unevenness and good stretch performance can be obtained. The cross section can be measured by the same measuring method as described above.

  In the present invention, considering the development of crimping and the like, it is preferable that the melt viscosity difference of the combined polymers is larger, and the melt viscosity difference is preferably 10 Pa · s or more as described above. A more preferable range is 100 Pa · s or more. From this viewpoint, it is preferable to increase the melt viscosity difference. However, considering the characteristic development and the elongation deformation difference in the spinning wire that can be controlled, in the present invention, the melt viscosity difference of the combined polymer is 100 to 400 Pa · s. Is a particularly preferable range. Here, the elongation characteristics of the woven or knitted material are improved by increasing the expression of crimp. By this effect, it is possible to achieve an elongation of 15% or more under a load of 1.5 kgf (14.7 N) in at least one of the warp direction and the weft direction of the woven or knitted fabric using the eccentric core-sheath composite fiber. Become.

  Further, as a combination of the core component (A component) and the sheath component (B component), a combination of polyesters has good crimping and mechanical properties, and is excellent in dimensional stability against humidity and temperature change. preferable. It is particularly preferable to use polybutylene terephthalate (PBT) as the component A because a woven or knitted fabric having good crimp and high stretchability can be obtained. That is, since PBT has a high shrinkage rate as a polymer property, for example, when combined with PET, the difference in shrinkage rate becomes large, so that the crimp expression power is large, and when stretched into a woven or knitted fabric, high stretch performance is obtained. Show. Furthermore, since PBT has extremely high crystallinity, it is excellent in dimensional stability in a fiber form, and it is possible to suppress a streak defect or the like of a woven or knitted material caused by unevenness in tension or temperature. Even when polytrimethylene terephthalate (PPT) is used as the component A, a woven or knitted material having high crimp and high stretchability can be obtained and can be preferably used.

  The eccentric core-sheath conjugate fiber used in the present invention preferably has a stretch / elongation ratio of 20 to 70% as shown in JISL1013 (2010) 8.11 method C (simple method). More preferably, it is 40% to 65%. This is a value indicating the degree of crimping, and the higher the value, the better the stretching performance. In addition, it is preferable that the expansion / contraction rate in the false twist yarn is also in the above range.

  In the eccentric core-sheath composite fiber used in the present invention, it is preferable that the Worcester spot U%, which is an index of the thickness spot in the fiber longitudinal direction, so-called fineness spot, is 1.5% or less. Thereby, not only can the dyeing unevenness of the woven or knitted material be avoided, but also the deterioration of the quality due to the unevenness of contraction of the woven or knitted material can be avoided, and a good woven or knitted article can be obtained. More preferably, it is 1.0% or less. In addition, it is preferable that the Worcester spots in the false twist yarn are also in the above range.

The single fiber fineness of the eccentric core-sheath conjugate fiber used in the present invention is preferably 1.0 dtex or less. More preferably, it is 0.8 dtex or less. As a result, the amount of yarn per unit area can be reduced, so that the weight of the woven or knitted fabric is improved, the rigidity of the fiber is reduced, and the softness can be further provided. In addition, it is preferable that the single yarn fineness of the false twist yarn is also in the above range.
In addition, since the eccentric core-sheath composite fiber used in the present invention has a dense woven and knitted surface morphology in combination with the fine spiral structure due to the crimping performance, the woven and knitted fabric has an unprecedented stretch having a smooth and delicate texture. It becomes the material.

  Further, in order to overcome the binding force of the woven or knitted fabric and stably develop the crimp, the shrinkage stress and the temperature at which the maximum value of the shrinkage stress is an important characteristic. The higher the shrinkage stress, the better the appearance of crimp under the constraint of the woven or knitted fabric, and the higher the temperature at which the maximum value of the shrinkage stress is, the easier the handling in the finishing step is. Therefore, in order to further enhance the appearance of crimp, the temperature at which the maximum value of the shrinkage stress is preferably 110 ° C. or more, more preferably 130 ° C. or more, and the maximum value of the shrinkage stress is 0.15 cN / dtex or more. Preferably, it is 0.20 cN / dtex.

  The eccentric core-sheath conjugate fiber in the present invention preferably has a certain degree of toughness in consideration of processability and substantial use in high-order processing, and the strength and elongation of the fiber are used as indices. it can. The term “strength” used herein means a value obtained by calculating a load-elongation curve of a fiber under the conditions shown in JIS L1013 (2010), and dividing a load value at break by an initial fineness. It is the value obtained by dividing the extension by the initial test length. In addition, the initial fineness means a value obtained by calculating the weight per 10,000 m from a simple average value obtained by measuring the weight of the unit length of the fiber a plurality of times.

  The eccentric core-sheath composite fiber used in the present invention preferably has a strength of 0.5 to 10.0 cN / dtex and an elongation of 5 to 700%.

  In the eccentric core-sheath composite fiber used in the present invention, the practicable upper limit of the strength is 10.0 cN / dtex, and the practicable upper limit of the elongation is 700%. When the eccentric core-sheath conjugate fiber of the present invention is used for general clothing such as inner and outer, the strength is preferably 1.0 to 4.0 cN / dtex and the elongation is preferably 20 to 40%. In sports clothing applications where the use environment is severe, it is preferable that the strength is 3.0 to 5.0 cN / dtex and the elongation is 10 to 40%.

  As described above, in the eccentric core-sheath conjugate fiber used in the present invention, it is preferable to adjust the eccentric core-sheath composite fiber by controlling the conditions of the manufacturing process in accordance with the intended use and the like.

  The eccentric core-sheath conjugate fiber used in the present invention is preferably used by false twisting. This is because false twisting can suppress crimp uniformity between single yarns, and improve the quality of the woven or knitted fabric such as wrinkles or wrinkles. As the false twisting method, any method such as a pin type, a friction disk type, a nip belt type, and an air twist type, which are generally used, may be used. The one-stage heater false twisting and the two-stage heater false twisting can be appropriately selected. For example, when performing the single-stage heater false twisting, the stretchability of the woven or knitted fabric is emphasized, and the two-stage heater false twisting may be used to suppress dimensional changes and abnormal shrinkage in the processing process. it can.

  It is also possible to use two or more eccentric core-sheath conjugate fibers and other fibers (the same eccentric core-sheath conjugate fibers) used in the present invention as a composite yarn or a mixed fiber. The mixed fiber preferably has a state in which two or more types of single yarns having different cross-sectional shapes are dispersed and mixed in the yarn bundle. The state of being dispersed and mixed here means that when observing the cross section of the yarn bundle, a plurality of types of fibers may be uniformly dispersed without bias, or may be arranged like a core-sheath structure. Alternatively, the mixed state may be such that the majority is parallel and only a part is mixed. Since the eccentric core-sheath conjugate fiber is characterized by the stretch property, even if it is arranged on the conventionally used mixed fiber, the stretch property is greatly improved from the conventional mixed fiber. Further, when the eccentric core-sheath composite fiber having a small single-filament fineness is used, the softness is further greatly improved.

  In the mixed fiber of the eccentric core-sheath conjugate fiber and other fibers used in the present invention, the ratio of the eccentric core-sheath conjugate fiber is preferably in the range of 20 to 80%. When there is a difference in the dyeability of the constituent single yarns, when a woven or knitted fabric is used, a single yarn of a plurality of compositions appears appropriately without only one single yarn appearing on the surface of the woven or knitted fabric. In order to obtain a woven or knitted fabric having a tone, it is more preferable that the weight ratio of the eccentric core-sheath composite fiber in the mixed fiber is in the range of 20 to 80%. In addition, in the mixed yarn having a difference in dyeability of the constituent single yarns, the degree of dispersion of the single yarn can be changed depending on the arrangement arrangement of the single yarns forming the mixed yarn within the above range. Therefore, it is also possible to control the pitch and color tone of the heather tone. Here, the difference in the dyeability of the single yarn means that when the mixed yarn is dyed with the same dye and the same conditions, the coloring is different depending on the type of the fiber constituting the mixed yarn. As a combination of fibers having a difference in dyeing properties, for example, polyester-based eccentric core-sheath composite fibers such as polyethylene terephthalate and polybutylene terephthalate that can be dyed with a disperse dye, cationically dyeable fibers, nylon fibers, and cellulose-based fibers Combinations with fibers that can be dyed with other than disperse dyes, such as fibers, are preferred. Further, a fiber dyed with a disperse dye, or a combination of fibers having a difference in color development after dyeing with a disperse dye due to full dull, bright, single yarn fineness or the like may be used.

  In the above-described mixed yarn, it is possible to appropriately select and use an interlace mixed fiber, a Taslan mixed fiber, whether or not false twisting is possible, or two or more types of mixed fibers. In addition, not only mixed fibers of long fibers obtained by a method of manufacturing an eccentric core conjugate fiber described later, but also eccentric sheath conjugate fibers are fiber-cut into mixed fibers of short fibers to form a spun yarn. The sheath composite fiber can be used according to the intended purpose, for example, by leaving the sheath composite fiber as a long fiber and forming a long and short composite spun yarn with other short fibers by MVS, ring, ply twist or the like.

  Here, if it is desired to use the elongation rate and the elongation recovery rate of the woven or knitted fabric satisfactorily, it is most preferable to perform the fiber mixing processing of the long fibers, and then the long and short composite processing (in particular, the eccentric core-sheath composite fiber is left as the long fiber, Long and short composite processing to form a long and short composite spun yarn is preferred). On the other hand, if emphasis is placed on soft texture, natural fiber-like texture, and appearance, composite processing of short fibers is most preferable, followed by long-short composite processing.

  In the case where a single yarn composed of a single component is used as the other fiber in the above-mentioned mixed fiber, it is also possible to select from the above-mentioned melt-moldable polymers according to the intended use and the like. For example, when a polymer having a different dyeing property from the eccentric core-sheath composite fiber is used, when the woven or knitted fabric is used, a heather tone corresponding to the color tone difference is obtained. In addition, when a polymer having a high shrinkage rate during heat treatment, such as a copolyester, is used, the yarn length difference between the single yarns is large after the heat treatment, and a single yarn having a low shrinkage rises to the surface. Therefore, a woven or knitted fabric having an excellent texture can be obtained.

  As described above, when one or more types of single yarns are included in the mixed fiber, the polymer and the shape to be used can be freely selected, and various functions can be imparted to the mixed fiber, which is preferable.

  Next, a preferred method for producing the eccentric core-sheath composite fiber used in the present invention will be described. The eccentric core-sheath conjugate fiber used in the present invention is, besides a two-step method in which the discharged polymer is once wound up as an undrawn yarn and then drawn, a direct spinning drawing method in which spinning and drawing steps are continuously performed, and a high-speed spinning method. For example, it can be manufactured in any process. In addition, since the range of the spinning speed in the high-speed spinning method is not particularly defined, it may be a step of drawing after winding as a semi-drawn yarn. Furthermore, yarn processing such as false twisting can be performed as necessary.

  When the eccentric core-sheath conjugate fiber of the present invention is produced by a two-step method, any ordinary drawing method can be used in addition to hot roll-hot roll drawing or drawing using a hot pin. In addition, stretching may be performed while adding confounding or false twisting according to the application. In order to suppress complex abnormalities such as generation of fluff and peeling of both components, it is preferable that the drawn yarn is drawn so that the residual elongation becomes 25 to 50%. When heat setting is performed in a stretched state and the molecular chain is fixed by cooling to a glass transition temperature or lower while maintaining the tension, the contraction stress can be increased, which is effective for improving the texture of the woven or knitted fabric. Specifically, it is preferable to pass a cold roll in a stretched state of about 0.3 to 3.0% because a high shrinkage stress can be obtained. In addition, since the yarn is wound and wound in a state in which stress is applied to the polymer side (for example, the component A of the present invention) that contracts in order to develop crimp, the viscoelastic material is formed after winding before forming the woven or knitted fabric. Delay shrinkage occurs depending on the behavior, and streaks may be formed on the woven or knitted fabric.

  On the other hand, in the eccentric core-sheath conjugate fiber used in the present invention, since one component is completely covered by the other component, delayed shrinkage can be suppressed, which can contribute to obtaining a uniform woven or knitted fabric. Furthermore, a high-molecular-weight polymer, a high-elasticity polymer, and the like, which could not be used until now, can be used as the high-shrinkage component, and a new eccentric core-sheath composite fiber that has not been obtained before can also be obtained.

  The spinning temperature is preferably set at a temperature +20 to + 50 ° C. higher than the melting point of the polymer. By setting the temperature higher than the melting point of the polymer by at least + 20 ° C., it is possible to prevent the polymer from solidifying and clogging in the spinning machine piping. This is preferable because thermal degradation can be suppressed.

  The eccentric core-sheath conjugate fiber used in the present invention is preferably obtained by a melt spinning method. However, as long as the spinneret can be stably spun in quality and operation, any spine having a commonly used internal structure can be used. In particular, a desired cross-sectional shape can be obtained by suitably using a distribution plate type die as exemplified in JP-A-2011-174215, JP-A-2011-208313, and JP-A-2012-136804.

  Here, it is important that the eccentric core-sheath conjugate fiber used in the present invention completely covers the component A with the component B as shown in FIG. By adopting the cross section defined in the present invention, it is possible to suppress the discharge line bending (kneeing phenomenon), which is caused by the difference between the flow rates of the two polymers at the time of discharging the die. Also, in the case of the conventional simple bonding structure (bimetal structure), a difference occurs in the stress balance applied to each polymer at the time of thinning on the spinning wire after the discharge of the spinneret, causing unevenness in elongation and deformation, which results in unevenness in fineness. In some cases, and U% increased in some cases. This tendency is very remarkable when the fineness is reduced by, for example, combining a polymer having a large difference in viscosity or reducing the discharge amount. In the present invention, however, the polymer is covered with one polymer. As a result, the stress balance is balanced in the fiber cross section, and unevenness in fineness can be suppressed. Furthermore, when a high molecular weight polymer is used for the component A and a low molecular weight polymer is used for the component B, it has been found that the high speed spinning stability is excellent because the polymer is completely covered with the component B. This is an effect that the low-molecular-weight polymer is arranged on the outside so that the high-molecular-weight polymer can easily follow the elongation deformation after the discharge of the die. As a result, the degree of freedom in selecting a polymer for improving the added value other than the stretching performance and for improving the yarn production stability of the fine-fine yarn is also drastically increased, thereby contributing to the improvement of productivity. As described above, unevenness in fineness can be suppressed by adopting the cross-sectional shape defined by the present invention.

  The woven or knitted fabric of the present invention is a woven or knitted fabric woven using at least a part of the eccentric core-sheath composite fiber, and at least one of the warp direction and the weft direction has a load of 1.5 kgf (14.7 N). The elongation at the time is preferably 15% or more. This is a performance exhibited by the high stretch property of the eccentric core-sheath composite fiber used in the present invention, but when it is 15% or more, not only for sports use, but also in slacks, business shirts, casual shirts, jackets, etc. A woven or knitted fabric that does not hinder movement can be obtained. More preferably, the elongation is 25% or more. When it is desired to increase the elongation, a knitted fabric or the like may be appropriately selected as desired. If the elongation rate is too high, the recovery rate decreases, so the upper limit of the elongation rate is preferably 100% or less.

  The woven or knitted fabric of the present invention preferably has an elongation recovery rate of at least 75% under a load of 1.5 kgf (14.7 N) in at least one of the warp direction and the weft direction. By setting the elongation recovery rate to 75% or more, the knitting phenomenon in the woven or knitted fabric is reduced, and a woven or knitted fabric in which knee dropout or elbow dropout hardly occurs is obtained.

 Regarding the abrasion strength of a woven or knitted fabric using the eccentric core-sheath conjugate fiber of the present invention, it is preferable that the tertiary color change by JIS L 1096 E method is 2000 times or more. There is no upper limit to the abrasion strength, and a higher one is preferable. However, a practical upper limit is about 10,000 times from the viewpoint of industrial production. In the woven or knitted fabric obtained from the fibers of the simply bonded bimetal structure, peeling occurred at the interface due to friction or impact, and the woven or knitted article tended to be partially degraded due to white streak-like whitening or fuzzing. . The eccentric core-sheath composite fiber used in the present invention has a structure in which one component polymer is covered with another component polymer, and therefore suppresses whitening and fluffing due to interfacial peeling that occurred in conventional bimetallic fibers. As a result, a woven or knitted fabric having high wear strength can be obtained.

  The eccentric core-sheath conjugate fiber used in the present invention preferably has a single-fiber fineness of 1 dtex or less as described above, but in the production thereof, the easily leached component is sea, and the eccentric core-sheath conjugate fiber is island. It is also possible to produce it as sea-island composite fiber and then to elute and remove sea components, but it is also possible to produce directly by spinning for the reasons described below. That is, the eccentric core-sheath composite fiber used in the present invention preferably does not contain a sea-island eluting component. By covering the periphery of the bimetal structure composite fiber with the sea-island eluting component, a fiber with a fineness of single yarn can be obtained while improving the spinnability, but the cost of the weaving and knitting due to the necessity of the elution process in the dyeing process is increased. Go up. In addition, the woven or knitted fabric with the bimetal composite fiber obtained by sea-island elution is set before the crimping of the yarn occurs due to the application of heat before elution, and the crimping effect is reduced. This is not preferable because the stretchability of the rubber is reduced. However, it is possible to use a fiber containing a sea-island-eluting component as the other of the eccentric core-sheath conjugate fibers of the present invention, as the mixed fiber, because it does not fall into the above-described stretchability.

  The eccentric core-sheath composite fiber used in the present invention, when the single yarn fineness is reduced, if the total fineness is the same, the number of single yarns in the fiber bundle can be increased, and since it has a high crimped structure, the usual As compared with a false twist yarn or a high count yarn having a large number of single yarns, the voids existing in the woven or knitted fabric can be more effectively filled by the number of fibers and the effect of crimping. Thus, by reducing the voids existing in the woven or knitted fabric, wind resistance and water pressure resistance can be improved. This improvement effect is particularly remarkable when compared with a woven or knitted fabric produced by a similar method using ordinary fibers having the same total fineness and the same number of filaments.

  The eccentric core-sheath composite fiber used in the present invention can have a total fineness in the range of 10 dtex to 600 dtex. Further, for clothing, a preferred range is 10 dtex or more and 300 dtex or less.

  Here, by increasing the density of the woven or knitted fabric or by calendering, a woven or knitted fabric having higher wind resistance and water pressure resistance can be obtained, but at the same time, the stretchability decreases, so the density and the processing method are appropriately selected according to the purpose. can do.

The good windproofness obtained by using the eccentric core-sheath conjugate fiber of the present invention is such that the woven fabric has an air permeability of 1 cc / cm ² / sec. In the case of a knitted fabric, the ventilation rate is 30 cc / cm ² / sec. It is as follows.

In addition, as described above, the use of the eccentric core-sheath composite fiber having a small single-fiber fineness and a large number of single-yarns can reduce voids in the woven or knitted fabric. A woven or knitted fabric with water pressure is obtained. Regarding the water pressure resistance, it is possible to achieve a water pressure resistance of 1000 mmH ₂ O (9.8 kPa) or more without coating or laminating. In the case of a knitted fabric, even 500 mmH ₂ O (4.9 kPa) or more can be preferably used. The water pressure is evaluated for a woven or knitted material that has not been coated or laminated. As a more preferable range, without coating or laminating, the woven fabric has a water resistance of 2000 mmH ₂ O (19.6 kPa) or more, and the knitted fabric has a water pressure of 1000 mmH ₂ O (4.9 kPa) or more, which is more preferable as a highly effective material. Can be used.

  In addition, the woven or knitted fabric of the present invention can obtain a woven or knitted fabric having excellent air permeability and water resistance as described above by itself, but further improving the air permeability and water pressure resistance by coating or laminating. Of course, it is possible. It is appropriately selected according to the application and required characteristics.

  In a woven or knitted fabric using an eccentric core-sheath composite fiber with a small single-fiber fineness, the single-fiber fineness is small, so the number of single-fibers constituting the fiber bundle is larger than when the total fineness is the same. When the water absorption process is performed, the ability to absorb water by the capillary phenomenon is improved. As a result, absorption of water droplets is quick, diffusion in the woven or knitted fabric structure is quick, and a quick-drying material can be obtained. Thus, comfortable sports clothing such as quickly absorbing and drying sweat during exercise can be obtained. Here, a preferable water absorption time is 5 sec. It is as follows.

  In addition, the eccentric core-sheath conjugate fiber of the present invention can be placed on one side to improve the water-absorbing quick-drying performance by forming a woven or knitted fabric having a multi-layer structure, but depending on the fiber used, the stretchability and soft texture are impaired. In some cases, it is necessary to appropriately select the constituent yarn, woven / knitted structure, and processing method.

  In addition, the eccentric core-sheath composite fiber may be given a real twist depending on the use of the woven or knitted fabric. As the twisting method, a conventional method may be used, and the twisting condition may be appropriately selected. For example, when the eccentric core-sheath composite fiber used in the present invention is strongly twisted, there is a soft and stretchable woven or knitted fabric having a refreshing feeling and a crisp feeling. Uniformity of surface feeling and the like can be provided.

  In the woven or knitted fabric of the present invention, as the woven or knitted structure, any structure such as a sheet of fabric, smooth, half, double Russell, plain woven fabric or twill woven fabric achieves its stretch performance and texture, but has a multilayer structure of two or more layers. And a woven or knitted fabric having the following. In the case of a knitted fabric, a circular knitted fabric such as reversible sheeting, punch roma, Milano rib, and tack rib, a single warp knitted fabric such as an inlay structure, and a double warp knitted fabric such as a double Russell can be given. Examples of the woven fabric include a multilayer woven fabric having a multilayer structure such as a warp double woven fabric and a weft double woven fabric. Above all, a knitted fabric is preferred from the viewpoint of quick drying.

  The woven or knitted fabric of the present invention thus obtained has a high stretch performance and a soft and delicate texture, and further has a uniform appearance without embossments or streaks, making use of this, suitable for sports clothing, fashion clothing, uniforms and the like. Can be used.

  Hereinafter, the eccentric core-sheath composite fiber of the present invention will be specifically described with reference to examples. The following evaluation was performed about the Example and the comparative example.

(1) Melt Viscosity of Polymer A chip-shaped polymer was adjusted to have a moisture content of 200 ppm or less by a vacuum dryer, and the melt viscosity was measured by changing the strain rate stepwise by a Capillograph 1B manufactured by Toyo Seiki. The measurement temperature was the same as the spinning temperature, and the melt viscosity of 1216 s ^-1 is described in Examples and Comparative Examples. Incidentally, the measurement was carried out in a nitrogen atmosphere by setting the sample in the heating furnace to the start of measurement in 5 minutes.

(2) Fineness Using a scale measuring machine with a frame circumference of 1.0 m, 100 sets of scabs were produced, and the fineness was measured according to the following equation.
Fineness (dtex) = Kase weight (g) × 100 times

(3) Fiber strength, elongation at break, toughness The sample was stretched at a constant speed according to the JIS L1013 (2010) 8.5.1 standard time test using a tensile tester (“TENSILON” UCT-100 manufactured by Orientec). It was measured under the conditions. The gripping interval at this time was 20 cm, the pulling speed was 20 cm / min, and the number of tests was 10 times. The elongation at break was determined from the elongation at the point showing the maximum strength in the SS curve. Toughness was calculated from the following equation.
Toughness = strength (cN / dtex) x (elongation (%)) ^1/2

(4) U% of eccentric core-sheath composite fiber
U% (H) was measured using a fineness unevenness measuring device (Zellweger, manufactured by UT-4) under the conditions of a yarn supply speed of 200 m / min, a twister rotation speed of 20,000 rpm, and a measurement length of 200 m.

(5) Expansion and contraction rate (fiber)
According to JIS L1013 (2010) 8.11 method C (simplified method), the stretch ratio was determined. The heat treatment before the measurement was performed at 90 ° C. for 20 minutes.

(6) Elongation rate (woven and knitted)
In accordance with the method A (strip method) described in JISL1096 (2010), the elongation under a load of 1.5 kgf (14.7 N) was measured.

(7) Elongation recovery rate (woven and knitted)
According to the method A described in JIS L1096 (2010), the elongation recovery rate under a load of 1.5 kgf (14.7 N) and unloading was measured.

(8) Wear Strength According to JISL1096E method (Martindale method), the number of times of abrasion at the point where the discoloration was grade 3 was measured.

(9) Air permeability It was carried out by a Frazier-type air permeability test described in JISL1096 (2010).

(10) Water pressure The water pressure was measured according to JIS L1092 (2010) A method (low water pressure method).

(11) Water absorption time The water absorption time was measured according to JISL1097 (2010) dropping method.

(12) Drying rate (diffusible residual moisture content)
The drying rate was measured according to the ISO17617 A1 method.

(13) Hand feeling In the sensory evaluation, evaluation was made in five stages of ◎, ○, Δ, ×, XX.
A: Very soft texture.
：: Soft texture.
Δ: Handy texture.
×: slightly hard texture ××: texture too hard to use.

(14) Water repellency (water repellency)
Evaluation was performed according to the JIS L 1092 spray method.

[Example 1]
(Spinning method and evaluation of eccentric core-sheath composite fiber)
A component is polybutylene terephthalate (PBT melt viscosity: 160 Pa · s), B component is polyethylene terephthalate (PET melt viscosity: 140 Pa · s), and both the polymer of the component A and the polymer of the B component are extruded. After melting at 270 ° C and 280 ° C respectively, measure with a pump and flow into the die while maintaining the temperature, setting 290 ° C as the spinning temperature, which is 30 ° C higher than the melting point of B component, which is the highest in each polymer. I let it. The weight composite ratio of the component A and the component B was set to 50/50, and the mixture was allowed to flow into a spinneret for eccentric core-sheath composite fibers having 72 discharge holes. The polymers merged inside the die to form an eccentric core-sheath composite form in which the polymer of the component A was included in the polymer of the component B, and was discharged from the die. In the spinning of Example 1, a die of a distribution plate type was used so as to obtain the eccentric core-sheath composite fiber shown in FIG.

  The yarn discharged from the spinneret is cooled by an air cooling device, applied with an oil agent, wound up by a winder at a speed of 1500 m / min so that the spinning draft becomes 220, and is stably wound as an undrawn yarn of 150 dtex-72 filament. I took it. At this time, the cooling start point is set to 97 mm from the die discharge surface, and the refueling position is set to 1130 mm from the die discharge surface, so that the spinning stress is 0.10 cN / dtex, which suppresses longitudinal yarn spots and stabilizes the spinning property. planned. Subsequently, the obtained undrawn yarn is sent to a drawing device at a speed of 300 m / min, and drawn at a drawing temperature of 90 ° C. and a draw ratio of 2.63 times so as to have an elongation of about 20 to 40%. Heat setting was performed at 130 ° C., and a drawn yarn of 56 dtex-72 filament having a strength of 3.6 cN / dtex and an elongation of 32% was stably obtained through the spinning and drawing steps. The S / D in the fiber cross section was 0.02, the minimum thickness portion occupied 40% on the fiber circumference, and the IFR / R was 1.3. The stretch ratio was 63%, and U% which is an index of fineness unevenness was 1.3%.

(Production method and evaluation of woven or knitted fabric)
The obtained drawn yarn is subjected to false twist processing under normal conditions, woven into a flat structure used for warp and weft, and then woven into a woven fabric (hereinafter referred to as woven fabric ). The obtained woven fabric was an unprecedented woven fabric having high stretchability and a soft feel like a knitted fabric, and was a Zokichi flat woven fabric having abrasion resistance in a wear test. The water absorption time was 1 second or less, and the quick-drying property based on the diffusible residual moisture was 25 minutes.

  The S / D of the false twist yarn in the fiber cross section is 0.08, and the peripheral length of the portion of the fiber having a thickness within 1.1 times the minimum thickness S accounts for 38% of the peripheral length of the entire fiber. The single-fiber fineness was 0.8 dtex, the elongation and contraction elongation was 66%, and U%, which is an index of unevenness in fineness, was 1.3%.

[Example 2]
After knitting a circular knitted fabric of a sheet-laying structure using 100% of the false twisted yarn obtained in Example 1, a knitted fabric was prepared by a normal dyeing method and a water absorbing process. The obtained woven fabric was an unprecedented woven fabric having both high stretchability and soft texture, and was a woven fabric having abrasion resistance in a wear test. The water absorption time was 1 second or less, and the quick-drying property based on the diffusible residual moisture was 30 minutes.

[Example 3]
After knitting a circular knitted fabric of a sheet-laying structure using 100% of the drawn yarn obtained in Example 1, a knitted fabric was prepared by a usual dyeing method and a water absorbing process. The obtained knitted fabric had both high stretchability and a soft texture, and was a knitted fabric having a particularly smooth feel, and was a woven fabric having abrasion resistance in a wear test. The water absorption time was 1 second or less, and the quick-drying property based on the diffusible residual moisture was 30 minutes.

[Example 4]
The textile greige obtained in Example 1 was subjected to a normal dyeing method and a non-fluorine water-repellent treatment. The obtained woven fabric was an unprecedented woven fabric having both high stretchability and soft texture, and had abrasion resistance in a wear test of a water-repellent product. The water repellency was high, and the water repellency was 4.5 at the beginning and 3.5 after 10 washes. The air permeability is also 1 cc / cm ² / sec. Also, it had a good performance of 1200 mmH ₂ O (11.8 kPa) even with water pressure resistance.

[Example 5]
The knitting was performed in the same manner as in Example 2 except that the knitting density was increased, and a normal dyeing method and a non-fluorine water-repellent treatment were performed. The obtained knitted fabric had high water pressure, which has never been seen before, having high stretchability and soft texture, and was a woven fabric having wear resistance in a wear test of a water-repellent product. The water repellency was 4.5 at the beginning and 3.5 after 10 washes. The air permeability is also 9 cc / cm ² / sec. Also, it had a good performance of 800 mmH ₂ O (7.9 kPa) even with water pressure resistance.

[Example 6]
The textile greige obtained in Example 1 was subjected to a usual dyeing method, a water-repellent treatment with non-fluorine, and a coating treatment with a urethane resin. Normally, the texture of the woven fabric is hardened by the coating process, but the obtained woven fabric is an unprecedented woven fabric that has both high stretchability and soft texture while being a coated product. Was a woven fabric having abrasion resistance. The water repellency was 4.5 at the beginning and 3.5 after 10 washes. The air permeability is also 0.0 cc / cm ² / sec. 4,000 mmH ₂ O (39.2 kPa) even at a water pressure resistance.

[Comparative Example 1]
Comparative Example 1 used a similar die in which the number of single yarns in the die described in the example of JP-A-09-157941 was changed, and used the same A component as in Example 1 using polybutylene terephthalate and the B component using polyethylene terephthalate. By a usual spinning and drawing method, a drawn yarn of 56 dtex-36 filament was obtained from a side-by-side type, 56 dtex-36 filament. The ratio of S / D in the fiber cross-section and the ratio of the minimum thickness portion on the fiber circumference was blank due to the side-by-side cross-section. The stretch ratio was 70%.

  The obtained drawn yarn was false-twisted, woven and processed in the same manner as in Example 1 to obtain a water-absorbent woven woven fabric having a flat structure. The obtained woven fabric had high stretchability, but had a hard feel and was slightly inferior in abrasion. The water absorption time was 1 second or less, and the quick-drying property in terms of the diffusible residual moisture was 30 minutes.

[Comparative Example 2]
Comparative Example 2 was woven and processed in the same manner as in Example 1 by using a 56dtex-72 filament false twist yarn (“Tetron W20L” manufactured by Toray Industries, Inc.) in which the component was polyethylene terephthalate alone, and was subjected to water absorption. A woven fabric with a flat structure was obtained. The obtained woven fabric had good texture and abrasion, but was inferior in woven fabric stretchability. The water absorption time was 1 second or less, and the quick-drying property in terms of the diffusible residual moisture was 30 minutes.

a: center of gravity of A component in cross section of composite fiber C: center of gravity of cross section of composite fiber S: minimum thickness of B component D: fiber diameter IFR: radius of curvature 1- (a) at interface between A component and B component in cross section of composite fiber ), (B): One example of the same kind of single yarn adjacently connected in the mixed fiber cross section 1- (c): One example of the adjacent filament group in the mixed fiber cross section 5- (a): Distribution hole in the final distribution plate Among them, the distribution hole of the B component forming the thin skin 5- (b): Among the distribution holes in the final distribution plate, the distribution hole of the B component other than 5- (a) 5- (c): the distribution hole in the final distribution plate Of which the component A distribution holes

Claims (13)

In the cross section of the eccentric core-sheath conjugate fiber composed of two kinds of polymers of the component A and the component B, the component A is completely covered with the component B, and the minimum thickness S of the thickness of the component B covering the component A is The ratio S / D of the fiber diameter D is 0.01 to 0.1, and the peripheral length of the portion of the fiber whose thickness is within 1.05 times the minimum thickness S is 1/3 or more of the peripheral length of the entire fiber. A woven or knitted fabric using at least a part of an eccentric core-sheath composite fiber. In the cross-section of the false twisted eccentric core-sheath conjugate fiber composed of two kinds of polymers of the A component and the B component, the A component is completely covered by the B component, and the B component covering the A component is The ratio S / D of the minimum thickness S of the thickness to the fiber diameter D is 0.01 to 0.2, and the peripheral length of the portion of the fiber whose thickness is within 1.10 times the minimum thickness S is the peripheral length of the entire fiber. A woven or knitted fabric using at least a part of an eccentric core-sheath conjugate fiber that is 1/3 or more of the above. 3. The woven or knitted fabric according to claim 1, wherein the eccentric core-sheath conjugate fiber has an expansion / contraction rate of 20 to 70%. The woven or knitted fabric according to any one of claims 1 to 3, wherein the eccentric core-sheath composite fiber has a single yarn fineness of 1.0 dtex or less and a fineness unevenness (U%) of 1.5% or less. The woven or knitted fabric according to any one of claims 1 to 4, wherein an elongation percentage under a load of 1.5 kgf (14.7 N) in at least one of the warp direction and the weft direction is 15% or more. The woven or knitted fabric according to any one of claims 1 to 5, wherein an elongation recovery rate under a load of 1.5 kgf (14.7N) in at least one of the warp direction and the weft direction is 75% or more. The woven or knitted fabric according to any one of claims 1 to 6, wherein the abrasion strength (JIS L 1096 E method, third-class discoloration) is 2,000 times or more. The woven or knitted fabric according to any one of claims 1 to 7, wherein the eccentric core-sheath conjugate fiber does not contain a sea-island eluting component. The woven or knitted fabric has an air permeability of 1 cc / cm ² / sec. The woven or knitted fabric according to any one of claims 1 to 8, which is the following woven fabric. The woven or knitted fabric has a ventilation rate of 30 cc / cm ² / sec. The woven or knitted fabric according to any one of claims 1 to 8, which is the following knitted fabric. Woven or knitted fabric according to any one of claims 1 to 9 water pressure is 1000mmH ₂ O (9.8kPa) above. The woven or knitted fabric according to any one of claims 1 to 11, wherein the eccentric core-sheath conjugate fiber is contained in the woven or knitted fabric in an amount of 25% by weight or more. Water absorption time is 5 sec. The woven or knitted fabric according to any one of claims 1 to 8, and the following: