JP7578433B2 - Fabric, its manufacturing method, and textile product - Google Patents

Description

The present invention relates to a fabric having a smooth, slippery texture with cilia and excellent dyeability, and preferably also excellent in firmness, volume, softness, and opacity like natural fibers such as silk, as well as a method for producing the fabric and a textile product.

Synthetic fibers such as polyester are widely used not only for clothing but also for industrial purposes due to their excellent physical and chemical properties, and are of great industrial value. However, these synthetic fibers have the disadvantage that the texture and luster of these fibers are monotonous compared to natural fibers such as silk and cotton, due to the fact that the single fiber fineness that constitutes the fiber is uniform, the single fiber fineness is large, and the cross-sectional shape is simple.

In order to improve these shortcomings, various attempts have been made, such as modifying the cross-sectional shape of synthetic fibers, using shrink processing, and using composite fibers, but it is still difficult to say that the objectives have been fully achieved.

For example, Patent Document 1 proposes forming a composite fiber of an easily degradable polymer and polyester, and then imparting a dry touch, squeaky texture and unique luster to woven and knitted fabrics by post-processing. Patent Document 2 proposes improving the texture by imparting unevenness in the length direction of the fiber. Patent Document 3 proposes a fiber with a thick-thin structure and grooves on the fiber surface, and a manufacturing method thereof, in order to obtain a fiber for woven and knitted fabrics that exhibits a higher squeaky texture, with silk as the target. These prior documents have been inventive and ingenious in order to obtain a soft, fluffy feel unique to natural fibers, but they are not yet satisfactory. On the other hand, Patent Document 4 seeks a unique soft touch and fineness by utilizing the characteristics of nanofibers, which are thinner than ultrafine fibers (microfibers) on the micron order, to seek a texture like that of a new type of textile, but the characteristics of nanofibers are significant, and it is not yet satisfactory in terms of the natural fluffiness, feel, appearance, and firmness seen in natural materials, which are the original objectives. Patent Document 5 proposes that a mixed yarn of large fiber diameter and sea-island fiber is woven and knitted, and then subjected to a sea-removal process to maintain mechanical properties. In this case, the sea-island fiber parts and the thick fiber bundle parts are unevenly distributed, and it is still not satisfactory in terms of natural fluffiness. Patent Document 6 proposes a method in which a sea-island fiber is prepared in advance such that small and large fiber diameters (island diameters) are mixed in the cross section of the sea-island fiber, and the sea-island fiber is knitted and woven, and then the sea-island fiber is removed. However, this method uses fibers with large fiber diameters (microfibers or larger), and is still not satisfactory in terms of fineness.

Japanese Unexamined Patent Publication No. 61-239010 Japanese Unexamined Patent Publication No. 58-70711 Japanese Unexamined Patent Publication No. 59-192709 International Publication No. 2013/021809 JP 2007-262610 A Japanese Patent Application Publication No. 5-331711

The present invention has been made in view of the above-mentioned background, and an object of the present invention is to provide a fabric having a smooth and slippery texture with ciliation and excellent dyeability, and preferably having excellent firmness, volume, softness, and transparency like natural fibers such as silk, a manufacturing method thereof, and a textile product thereof.

As a result of extensive research into achieving the above object, the inventors discovered that the desired fabric could be obtained by ingeniously devising the structure of the multifilaments that make up the fabric, and further extensive research led to the completion of the present invention.

Thus, according to the present invention, there is provided "a fabric comprising a multifilament including one or more fiber groups each including a central fiber located at the center and 50 to 100 ultrafine fibers surrounding the central fiber in a satellite shape ."

In this case, it is preferable that the single fiber diameter of the ultrafine fiber is 5000 nm or less. It is also preferable that the single fiber diameter of the central fiber is 10 times or more that of the ultrafine fiber. It is also preferable that the fiber group includes one central fiber and 50 to 100 ultrafine fibers. It is also preferable that the multifilament includes 10 or more fiber groups. It is also preferable that the multifilament is twisted. It is also preferable that the multifilament is included in a fabric as a sheath part of a core-sheath type composite yarn. It is also preferable that the core part of the core-sheath type composite yarn is made of a composite fiber composed of two components. It is also preferable that any one of the fibers constituting the fabric includes a recycled polymer. It is also preferable that the dyeability is 30 or less in terms of L value.

The present invention also provides a method for producing a fabric, which comprises obtaining a fabric using composite fibers composed of a central fiber island component located at the center, a plurality of ultrafine fiber island components arranged so as to surround the central fiber island component, and a sea component, and then subjecting the fabric to a sea-removal treatment.

The present invention also provides a textile product made from the above-mentioned fabric, selected from the group consisting of women's blouses, dresses, party dresses, men's suits, jackets, slacks, innerwear, sportswear, interior items, and daily necessities.

The present invention provides a fabric with excellent dyeability, firmness and elasticity like natural fibers such as silk, a smooth and slippery texture, a fluffy feel, a soft feel, and excellent transparency, as well as a manufacturing method thereof and a textile product.

FIG. 2 is a diagram illustrating an example of a fiber group according to the present invention. 1 is a photograph, shown in place of a drawing, of a cross section of a multifilament constituting the fabric obtained in Example 1. 1 is a photograph, shown in place of a drawing, of a cross section of a multifilament constituting the fabric obtained in Comparative Example 1. 1 is a photograph, shown in place of a drawing, of a cross section of a multifilament constituting the fabric obtained in Comparative Example 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings, in which: FIG.
Here, the number of central fibers is preferably 1. The number of ultrafine fibers surrounding the central fiber in a satellite shape is preferably 10 or more (more preferably 30 to 100).

In addition, the single fiber diameter (r _s ) of the ultrafine fibers (star portion) is preferably 5000 nm or less (more preferably 10 to 1000 nm, particularly preferably 100 to 800 nm) in order to obtain an excellent soft feel. On the other hand, it is preferable that the single fiber diameter (r _c ) of the central fiber (core portion) is 10 times or more (more preferably 10 to 50 times) that of the ultrafine fibers in order to improve firmness and dyeability. In the central fiber and/or ultrafine fibers, the cross-sectional shape of the single fiber is not limited, and may be any of round, hollow (for example, round hollow, triangular hollow, square hollow, etc.), and irregular (for example, triangular, square, flat, cross, etc.). When the cross-sectional shape of the single fiber is an irregular cross section other than a round cross section, the diameter of the circumscribed circle is taken as the single fiber diameter. The single fiber diameter can be measured by photographing the cross section of the fiber with a transmission electron microscope.

The type of polymer forming the ultrafine fibers and the central fiber is not particularly limited, but polyester-based polymers are preferred in terms of fiber strength and color fastness. For example, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, stereocomplex polylactic acid, polyester copolymerized with a third component, and the like are preferred examples. Such polyesters may be polyesters that have been material recycled or chemically recycled, or polyethylene terephthalate or polytrimethylene terephthalate that uses monomer components obtained from biomass, i.e., plant-derived substances, as described in JP-A-2009-091694. Furthermore, polyesters obtained using catalysts containing specific phosphorus compounds and titanium compounds or catalysts made of light metals such as titanium-based catalysts, as described in JP-A-2004-270097 and JP-A-2004-211268, may also be used. The polymer may contain one or more of the following as necessary within the scope of the present invention: a micropore-forming agent, a cationic dye-enabling agent, a coloring inhibitor, a heat stabilizer, a fluorescent whitening agent, a matting agent, a colorant, a moisture absorbent, and inorganic fine particles.

In the present invention, the multifilament contains one or more (preferably 10 to 100) of the above fiber groups.
Such a multifilament can be produced, for example, by the following method. First, the above-mentioned polymer is prepared as the island component polymer (polymer forming the ultrafine fibers and the central fiber). In this case, various additives such as inorganic substances such as titanium oxide, silica, barium oxide, etc., colorants such as carbon black, pigments, dyes, etc., flame retardants, fluorescent whitening agents, antioxidants, ultraviolet absorbing agents, etc. may be contained in the above-mentioned polymer.

Examples of the sea component polymer include polymers that can be melt-molded and can be dissolved and extracted after spinning, such as copolymerized polyethylene terephthalate, polyamide, polystyrene and its copolymers, polyethylene, and polyvinyl alcohol.
In this case, the weight ratio of the two components forming the composite fiber is preferably within the range of 80:20 to 20:80.

Next, each component is extruded from a spinneret having nozzles for extruding the central fiber island component (preferably 1 to 3, particularly preferably 1), the ultrafine fiber island components (preferably 10 or more, more preferably 30 to 100) arranged radially (satellite-like) around it, and the sea component.

The extruded islands-in-the-sea type composite fiber is solidified by cooling air, and is preferably melt-spun at 400 to 6000 m/min and then wound up. The undrawn yarn obtained may be subjected to a separate drawing process to produce a composite fiber having the desired strength, elongation and heat shrinkage properties, or may be taken up on a roller at a constant speed without being wound up, and then subjected to a drawing process before being wound up. Furthermore, false twist crimping may be performed. In such islands-in-the-sea type composite fiber, the single fiber fineness, the number of filaments and the total fineness are preferably within the ranges of 0.5 to 10.0 dtex, 5 to 75 filaments and 30 to 170 dtex (preferably 30 to 100 dtex), respectively.
In the present invention, the multifilament is obtained by subjecting the islands-in-sea type composite fiber to a sea-removal treatment.

The fabric of the present invention is a fabric made using such multifilaments. In this case, it is most preferable that the fabric is made only of the multifilaments, and it is preferable that the multifilaments account for 30% by weight or more (more preferably 40% by weight or more) of the fabric weight.

The total cover factor CF of the fabric (woven or knitted fabric) is preferably 1000 or more (more preferably 1000 to 3000). The cover factor CF is calculated by the following formula.
CF=(DWp/1.1) ^1/2 ×MWp+(DWf/1.1) ^1/2 ×MWf
[DWp is the total warp fineness (dtex), MWp is the warp weave density (pieces/2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (pieces/2.54 cm).]

In this case, the islands-in-sea type composite fiber may be used as it is without twisting to weave a fabric, but if it is twisted at 500 to 3400 T/m, the sea component is dissolved to remove the sea component, and the composite fiber takes on a spring shape, and the ultrafine fibers become cilia to cover the central fiber, improving the smooth and slippery feel, softness, lightness, and firmness. In this case, the twist coefficient is preferably within the range of 7000 to 30000. The twist coefficient is the product of the number of twists (T/m) and (D/1.1) ^1/2 , where D is the total fineness (dtex) of the composite yarn.

The islands-in-the-sea composite fiber (multifilament) may be included in the fabric as the sheath of a core-sheath composite yarn. In addition, in such a core-sheath composite yarn, the core may be composed of a composite fiber made of two components.

The weaving structure of such a fabric is not particularly limited, and examples of the weaving structure of the fabric include three-pronged weaves such as plain weave, twill weave, and satin weave, variation weaves such as variation weave and variation twill weave, single-ply weaves such as warp double weave and weft double weave, warp pile weaves such as warp velvet, towel, and velour, and weft pile weaves such as velvet, weft velvet, velvet, and corduroy. Fabrics having these weaving structures can be woven by ordinary methods using ordinary looms such as rapier looms and air jet looms. The number of layers is also not particularly limited, and may be a single layer or a multi-layered structure of two or more layers. The type of knitted fabric may be a weft knitted fabric or a weft knitted fabric. Preferred examples of weft knitting include plain knitting, rib knitting, double-sided knitting, purl knitting, tuck knitting, floating knitting, one-sided rib knitting, lace knitting, and brushed knitting, while preferred examples of warp knitting include single denbigh knitting, single atlas knitting, double cord knitting, half tricot knitting, fleece knitting, and jacquard knitting. Knitting can be performed by a conventional method using a conventional knitting machine such as a circular knitting machine, flat knitting machine, tricot knitting machine, or Raschel knitting machine. The number of layers is not particularly limited, and may be a single layer or a multi-layer structure of two or more layers.

When the fabric is a woven fabric, the density of the final fabric is preferably a warp density of 130 threads/2.54 cm or more (preferably 130 to 200 threads/2.54 cm) and a weft density of 90 threads/2.54 cm or more (100 to 150 threads/2.54 cm), as this improves the transparency resistance.

Next, the fabric is dyed, and then the sea-removal treatment is performed by an alkali weight reduction process to convert the islands-in-sea type composite fiber into a multifilament containing one or more fiber groups including a central fiber located at the center and a plurality of ultrafine fibers surrounding the central fiber, thereby obtaining a fabric having a soft feel and a light feel in which the cilia of the ultrafine fibers cover the central fiber. At the same time, the fabric has excellent transparency prevention properties and sufficient color fastness. In this case, the central fiber having a large fiber diameter is dyed in a deep color, so that excellent dyeability and color fastness are obtained. In particular, when the multifilament containing one or more fiber groups including a central fiber located at the center and a plurality of ultrafine fibers surrounding the central fiber is twisted, the firmness, fullness, softness, and transparency prevention properties are further improved, as in natural fibers such as silk.

Here, it is preferable that the dyeability is an L value of 30 or less (more preferably 10 to 25). The dye fastness is evaluated in terms of washing fastness and moisture-sensitive friction fastness according to JIS L-0844 and JIS L-0849. It is preferable that both fastnesses are grade 4 or higher. In addition, it is preferable that the transparency is 65% or more (more preferably 70% or more, and particularly preferably 72 to 98%).

Next, the textile product of the present invention is any textile product selected from the group consisting of women's blouses, one-piece dresses, party dresses, men's suits, jackets, slacks, innerwear, sportswear, interior items, and daily necessities, which uses the above-mentioned fabric. Since such textile products use the above-mentioned fabric, they have excellent dyeability, firmness like natural fibers, a dry texture with ciliary hairs, a fluffy feel, a soft feel, and excellent opacity.

Next, examples and comparative examples of the present invention will be described in detail, but the present invention is not limited to these. The measurement items in the examples were measured by the following methods.

<Staining L value>
Using a Macbeth Color-Eye Model M-2020 (manufactured by Kollmorgen, USA), the L value of the test cloth was measured with a light source of D65 and a 10-degree visual field. The n number was 5, and the average value was calculated.

<Color fastness>
The color fastness to washing and moisture-sensitive rubbing fastness, discoloration and staining were measured according to JIS L-0844 and L-0849. Grade 4 or higher was considered to be acceptable.

<Anti-transparency>
The transparency was measured according to JIS L-1923. In a woven fabric made of multifilaments having a total cover factor of 1200 or more, a value of 70% or more was judged to be excellent.

＜Harikoshi (tight waist)＞
Sensory evaluation by five testers was conducted and the results were rated on a three-level scale of "excellent,""slightlyinferior," and "inferior," with the most common rating being taken as the conclusion.

[Example 1]
Using polyethylene terephthalate (melt viscosity at 280°C: 1200 poise, content of matting agent: 0 wt%) made of recycled material derived from PET bottles as the island component and polyethylene terephthalate (melt viscosity at 280°C: 1750 poise) copolymerized with 6 mol % of 5-sodium sulfoisophthalic acid and 6 wt % of polyethylene glycol having a number average molecular weight of 4000 as the sea component, islands 1 and islands 2 (fiber diameters of islands 1 and island 2 are 10 times or more) having two fiber diameters are arranged in a satellite shape such that one island 1 (for central fiber) is surrounded by 50 islands 2 (for ultrafine fibers) as a nucleus (dissolution rate ratio (sea/island) = 230), sea:island = 50:50, number of islands = 51, a sea-island type composite undrawn fiber (number of filaments: 27) was melt spun at a spinning temperature of 280°C and a spinning speed of 1500 m/min, and once wound up. The obtained undrawn yarn was roller-drawn at a drawing temperature of 80° C. and a draw ratio of 2.5 times, then heat-set at 150° C. and wound up. The obtained islands-in-sea type composite fiber (drawn yarn) had a total fineness of 73 dtex/27 fil. When the fiber cross section was observed with a transmission electron microscope (TEM), the islands were round in shape, and the diameter of island 1 was 10,000 nm and the diameter of island 2 was 700 nm. In this case, the ratio of the single fiber diameters of the two islands was 14. Next, the composite fiber was twisted to a twist of 3100 T/m (twist coefficient 25180) and set at 90°C, then arranged as warp and weft yarns, and woven into a plain weave with a warp density of 105/2.54 cm and a weft density of 90/2.54 cm, then pre-relaxed at 60°C, flow-relaxed at 120°C, pre-set at 170°C, reduced by alkali (reduction rate 43%), dyed at 130°C with a black disperse dye, and finally set at 170°C. The finished fabric had a warp density of 139/2.54 cm and a weft density of 101/2.54 cm. The fineness of the warp and weft yarns after processing was measured, and it was about 40 dtex due to the dissolution and disappearance of the sea part by the weight reduction processing. Furthermore, the woven structure obtained was confirmed by an electron microscope, and the multifilament constituting the multifilament had 27 fiber groups, each including one central fiber located at the center and 50 ultrafine fibers surrounding the central fiber. Also, voids (Fig. 2, Photo 1) were confirmed between the single fibers in the multifilament. Also, the dyeability was measured by the L value, and the L value was 21. When the fastness to washing and the fastness to rubbing with moisture were confirmed, the fastnesses to discoloration and staining were both grade 4 or higher, and the fastness was excellent. In addition, the total cover factor of this woven fabric was 1447, and the anti-transparency of the fabric was confirmed to be 75.8%, which was an excellent result. Furthermore, the evaluation result of the firmness was "excellent," and the woven fabric had a smooth and slippery texture and excellent bulk.

[Example 2]
The yarn was spun in the same manner as in Example 1, and the yarn was woven in a plain weave with a warp density of 120/2.54 cm and a weft density of 99/2.54 cm without twisting. The yarn was then pre-relaxed at 60°C, flow-relaxed at 120°C, pre-set at 170°C, and reduced in weight by alkali (weight reduction rate: 48%). The yarn was dyed at 130°C with a black disperse dye, and then finished by final setting at 170°C. The finished fabric had a warp density of 136/2.54 cm and a weft density of 108/2.54 cm. The fineness of the warp and weft yarns after processing was measured and found to be 38 dtex due to the dissolution and disappearance of the sea portion caused by the weight reduction process. The ratio of the single fiber diameters of the two islands was 14. The dyeability was L value 22, and when the physical properties of the fabric were checked, the fastnesses were graded 4 or higher for discoloration and staining, which was excellent, but the stiffness was rated as "slightly poor." The total cover factor of this fabric was 1471, and when checked, the transparency was found to be 70%, but based on the fabric cover factor of Example 1, it was 68.8%, which was a slightly inferior result.

[Comparative Example 1]
Using polyethylene terephthalate (melt viscosity at 280°C: 1200 poise, matting agent content: 0 wt%) as the island component and polyethylene terephthalate (melt viscosity at 280°C: 1750 poise) copolymerized with 6 mol % of 5-sodium sulfoisophthalic acid and 6 wt % of polyethylene glycol having a number average molecular weight of 4000 as the sea component (dissolution rate ratio (sea/island) = 230), sea:island = 30:70, number of islands = 8360, and the island parts having the same fiber diameter were melt spun at a spinning temperature of 280°C and a spinning speed of 1500 m/min, and temporarily wound up. The obtained undrawn yarn was roller drawn at a drawing temperature of 80°C and a draw ratio of 2.5 times, then heat set at 150°C and wound up. The resulting islands-in-the-sea composite fiber multifilament (drawn yarn) had a total fineness of 56 dtex/10fil, and when the fiber cross section was observed by a transmission electron microscope (TEM), the shape of the islands was round and the diameter was 700 nm. Next, the composite fiber yarn was twisted at 3100 T/m (twist coefficient 21920) and twist-stopped and set at 90°C, and then arranged as warp and weft yarns and woven into a plain weave with a warp density of 130/2.54 cm and a weft density of 99/2.54 cm, and then preliminary relaxed at 60°C, liquid flow relaxed at 120°C, pre-set at 170°C, alkali reduction (reduction rate 40%), dyed at 130°C using a black disperse dye, and finished by final setting at 170°C. The finished fabric had a warp density of 195/2.54 cm and a weft density of 110/2.54 cm. The fineness of the warp and weft yarns after processing was measured and found to be 33 dtex due to the dissolution and disappearance of the sea portion caused by the weight reduction processing. Furthermore, the fabric structure obtained was confirmed with an electron microscope to be free of gaps between the constituent multifilaments (Fig. 3, Photo 2). The dyeability was poor with an L value of 35, and the color development was poor, and the fastnesses of discoloration and staining were both grade 2. The total cover factor of this fabric was 1671, and the opacity was confirmed to be 79%, but based on the fabric cover factor of Example 1, it was 68.4%, which was a slightly inferior result. The stiffness was "poor", and the fabric had a slimy texture specific to ultra-fine fibers, and also had no bulk and a loose texture.

[Comparative Example 2]
Polyethylene terephthalate (melt viscosity at 280°C: 1200 poise, content of matting agent: 1.8% by weight) was melt spun at a spinning temperature of 280°C and a spinning speed of 1500 m/min, and then wound up. The resulting undrawn yarn was roller-drawn at a drawing temperature of 80°C and a draw ratio of 2.5 times, and then heat-set at 150°C and wound up. The resulting round cross-section multifilament (drawn yarn) had a total fineness of 44 dtex/36fil. The drawn yarn was then given a twist of 3100 T/m (twist coefficient 19606) and twist-stopped at 90°C. The yarn was then arranged as warp and weft yarns and woven into a plain weave with a warp density of 105 threads/2.54 cm and a weft density of 90 threads/2.54 cm. The yarn was then pre-relaxed at 60°C, flow-relaxed at 120°C, pre-set at 170°C, and reduced in weight by alkali (weight reduction rate 10%). The yarn was then dyed at 130°C using a black disperse dye and finally set at 170°C for finishing. The finished fabric had a warp density of 167 threads/2.54 cm and a weft density of 115 threads/2.54 cm (Figure 4, Photo 3). When dyeability was measured using the L value, the L value was 16, and the various fastnesses in terms of discoloration and staining were equivalent to those of Example 1. The total cover factor of this fabric was 1784, and when its transparency was confirmed it was 73%, but when the fabric cover factor of Example 1 was used as the standard, it was 59%, resulting in a more transparent fabric. The firmness was "excellent," but the texture was not soft and the fabric had no bulk.

[Comparative Example 3]
Polyethylene terephthalate (melt viscosity at 280°C: 1200 poise, content of matting agent: 1.8% by weight) was melt spun at a spinning temperature of 280°C and a spinning speed of 1500 m/min, and then wound up. The resulting undrawn yarn was roller-drawn at a drawing temperature of 80°C and a draw ratio of 2.5 times, and then heat-set at 150°C and wound up. The resulting round cross-section multifilament (drawn yarn) had a total fineness of 33 dtex/24 fil. Next, the drawn yarn was twisted to 3100 T/m (twist coefficient 16979) and twist-stopped at 90°C, then arranged as warp and weft yarns, and woven in a plain weave with a warp density of 130/2.54 cm and a weft density of 99/2.54 cm, then pre-relaxed at 60°C, flow-relaxed at 120°C, pre-set at 170°C, dyed at 130°C with a black disperse dye, and finally set at 170°C. The finished fabric had a warp density of 134/2.54 cm and a weft density of 197/2.54 cm. The dyeability was measured by the L value, which was 18, and the various fastnesses were grade 4. The total cover factor of this woven fabric was 1320, and the anti-transparency was confirmed to be 63%, but based on the fabric cover factor of Example 1, it was 69.1%, which was a slightly inferior result. The fabric had "excellent" firmness, but no hairs at all, and had the characteristic synthetic feel with no softness or bulk.

[Comparative Example 4]
Polyethylene terephthalate (melt viscosity at 280°C: 1,200 poise, content of matting agent: 1.8% by weight) was melt-spun at 280°C using a conventional spinning device.
The yarn was taken up at a speed of 1.6 times, and wound up without stretching to obtain a semi-stretched polyester yarn of 56 dtex/36 fil (cross-sectional shape of single fiber: round cross-section). The polyester yarn was then subjected to simultaneous draw-false-twist crimp processing under the conditions of a draw ratio of 1.6 times, a false twist number of 2500 T/m, a heater temperature of 180°C, and a yarn speed of 350 m/min. The obtained round cross-section multifilament (false-twisted yarn) had a total fineness of 33 dtex/36 fil. Next, the false twist yarn was subjected to twisting at 300 T/m (twist coefficient 1643), which was arranged as warp and weft yarns, and woven in a plain weave with a warp density of 135/2.54 cm and a weft density of 130/2.54 cm, then preliminary relaxed at 60°C, flow relaxed at 120°C, pre-set at 170°C, dyed with a black disperse dye at 130°C, and finally set at 170°C. The finished fabric had a warp density of 160/2.54 cm and a weft density of 140/2.54 cm. The total cover factor of this woven fabric was 1720. When the dyeability was measured by the L value, the L value was 17, and the various fastnesses were grade 4. However, the anti-transparency rate was high at 82% due to the false twist bulkiness, but based on the fabric cover factor of Example 1, it was 69%, which was slightly inferior to the fabric filling degree. The fabric had a "slightly inferior" firmness and bounciness, a bulkiness characteristic of false-twisted yarn, and a dry touch. The fabric had no lint whatsoever.

The present invention provides a fabric with excellent dyeability, firmness and elasticity like natural fibers such as silk, a smooth and slippery texture, a fluffy feel, a soft feel, and excellent transparency, as well as a manufacturing method and a textile product thereof, and is of great industrial value.

Claims (12)

A fabric characterized by including a multifilament containing one or more fiber groups each including a central fiber located at the center and 50 to 100 ultrafine fibers surrounding the central fiber in a satellite shape. The fabric according to claim 1, wherein the single fiber diameter of the ultrafine fibers is 5000 nm or less. The fabric according to claim 1 or 2, wherein the single fiber diameter of the central fiber is 10 times or more that of the ultrafine fiber. The fabric according to any one of claims 1 to 3, wherein the fiber group includes one central fiber and 50 to 100 ultrafine fibers. The fabric according to any one of claims 1 to 4, wherein the multifilament contains 10 or more of the fiber groups. The fabric according to any one of claims 1 to 5, wherein the multifilament is twisted. The fabric according to any one of claims 1 to 6, in which the multifilament is included in the fabric as the sheath of a core-sheath composite yarn. The fabric according to claim 7, wherein the core of the sheath-core composite yarn is made of a bicomponent composite fiber. The fabric according to any one of claims 1 to 8, wherein any of the fibers constituting the fabric contains a recycled polymer. The fabric according to any one of claims 1 to 9, having a dyeability of 30 or less in terms of L value. The method for producing a fabric according to any one of claims 1 to 10, comprising obtaining a fabric using composite fibers composed of a central fiber island component located at the center, a plurality of ultrafine fiber island components arranged so as to surround the central fiber island component, and a sea component, and then carrying out a sea component removal process. A textile product selected from the group consisting of women's blouses, dresses, party dresses, men's suits, jackets, slacks, innerwear, sportswear, interior goods, and daily necessities, made using the fabric according to any one of claims 1 to 10.