Core-sheath structure spun yarn, cloth, clothing and manufacturing method thereof

Abstract

To provide a core-sheath structure spun yarn, cloth, and clothing, which are excellent in water-absorbing and quick-drying property and moisture absorbing and desorbing property, free from clinging to the skin, and reduced sticky feeling during sweating, and also to provide a manufacturing method thereof.SOLUTION: A spun yarn 1 has a core-sheath structure. A core part 2 includes modified regenerated cellulosic fibers 2a. A sheath part 3 is mixed fiber including unmodified regenerated cellulosic fibers 3a, polyester fibers 3b, and water-soluble fibers 3c. Compound having ethylenic unsaturated double bond and carboxyl group (-COOH) or its salt is graft bonded with the unmodified regenerated cellulosic fiber in the modified regenerated cellulosic fiber 2a. This manufacturing method makes the core-sheath structure spun yarn by disposing the modified regenerated cellulosic fibers 2a at the core part and disposing the mixed fiber including the unmodified regenerated cellulosic fibers 3a, the polyester fibers 3b, and the water-soluble fibers 3c at the sheath part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a core-sheath structured spun yarn, fabric, clothing having moisture absorption and desorption properties and quick-drying properties, and methods for producing the same.

Background Art

[0002] Clothing that directly touches the skin is desired to have not only high hygroscopicity and a high ability to reduce a stuffy feeling, but also a high ability to release the absorbed moisture. Cellulose fibers such as cotton and rayon have high hygroscopicity and are used as materials for various clothing such as inner clothing as comfortable fibers. In recent years, moisture absorption and heat generation processing has also been performed on cellulose fibers. Moisture absorption and heat generation is a property in which dry fibers generate heat when absorbing moisture (water), and for example, even if a futon exposed to sunlight during the day is brought into a room and after several hours has reached the same temperature as the room temperature, it is known as a phenomenon that it feels warm when applied to the skin of a human body.

[0003] Patent Document 1 discloses a woven or knitted fabric using a core-sheath type composite yarn in which a core part is composed of fibers having a standard moisture regain of 3.5% or more such as rayon and cupra, and a sheath part is composed of fibers having a standard moisture regain of 1.0% or less such as polyester fibers. Patent Document 2 discloses a composite spun yarn having a core-sheath structure in which a spun yarn having water absorption and moisture absorption and desorption properties is arranged in a core part and a filament yarn is arranged in a sheath part. The present applicant has proposed a modified cellulose-based fiber in which an ethylenically unsaturated double bond and a carboxyl group (-COOH) or a salt thereof are introduced into a cellulose-based fiber as a method for imparting moisture absorption and heat generation characteristics to a cellulose-based fiber (Patent Documents 3 to 4).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

[0005] However, the conventional technology still lacks sufficient water absorption and quick-drying properties, moisture absorption and desorption properties, skin-fitting properties, and stickiness during sweating, and further improvement has been demanded.

[0006] In order to solve the above problems, the present invention provides a core-sheath structured spun yarn, fabric, clothing, and manufacturing methods thereof, which have good water absorption and quick-drying properties, moisture absorption and desorption properties, and skin-fitting properties, and improve the stickiness during sweating. [Means for Solving the Problems]

[0007] In one aspect, the present invention relates to a spun yarn having a core-sheath structure, wherein the core portion contains modified regenerated cellulose fibers, and the sheath portion is a blended fiber containing unmodified regenerated cellulose fibers, polyester fibers, and water-soluble fibers, and the modified regenerated cellulose fibers are those in which an ethylenically unsaturated double bond and a carboxyl group (-COOH) or a salt thereof are graft-bonded to unmodified regenerated cellulose fibers.

[0008] In another aspect, the present invention relates to a method for manufacturing a core-sheath structured spun yarn, in which modified regenerated cellulose fibers are arranged in the core portion, and a blended fiber containing unmodified regenerated cellulose fibers, polyester fibers, and water-soluble fibers is arranged in the sheath portion to form a core-sheath structured spun yarn.

[0009] In still another aspect, the present invention relates to a woven fabric or knitted fabric containing the core-sheath structured spun yarn. In still another aspect, the present invention relates to a method for manufacturing a fabric or knitted fabric containing the core-sheath structured spun yarn, which is a method for manufacturing a fabric in which water-soluble fibers arranged in the sheath portion are removed by hot water. In still another aspect, the present invention relates to clothing containing the woven fabric or knitted fabric.

Advantages of the Invention

[0010] In the present invention, a core-sheath structured spun yarn is provided, wherein the core part contains modified regenerated cellulose fibers, and the sheath part contains a blended fiber containing unmodified regenerated cellulose fibers, polyester fibers, and water-soluble fibers. The modified regenerated cellulose fibers are those in which an ethylenically unsaturated double bond and a carboxyl group (-COOH) or its salt are graft-bonded to unmodified regenerated cellulose fibers. By virtue of this, a core-sheath structured spun yarn, fabric, clothing, and their manufacturing methods can be provided, which have good water absorption and quick drying properties, moisture absorption and desorption properties, and skin-fitting properties, and improve the stickiness feeling during sweating.

Brief Description of the Drawings

[0011]

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Embodiments for Carrying Out the Invention

[0012] The present invention relates to a core-sheath structured spun yarn, wherein the core part contains modified regenerated cellulose fibers, and the sheath part is a blended fiber containing unmodified regenerated cellulose fibers, polyester fibers, and water-soluble fibers. With this core-sheath yarn structure, the problem of slightly lower strength of the modified regenerated cellulose fibers is compensated for by the sheath part. The modified regenerated cellulose fibers and the unmodified regenerated cellulose fibers have high moisture absorption and desorption properties, the polyester fibers have high water absorption and quick-drying properties, and the water-soluble fibers, after being made into a fabric, are removed with hot water to form a space, and this part swells as a yarn to exhibit a bulging feeling, and overall, the water absorption and quick-drying properties, moisture absorption and desorption properties, and skin-fitting properties can be improved. Examples of the unmodified regenerated cellulose fibers include ordinary rayon, solvent-spun rayon, and cupra. Examples of the polyester fibers include polyethylene terephthalate (PET), and PET copolymerized with 5-sodium sulfoisophthalic acid. Examples of the water-soluble fibers include water-soluble vinylon fibers.

[0013] The modified regenerated cellulose fibers are obtained by graft-bonding an ethylenically unsaturated double bond and a compound having a carboxyl group (-COOH) or a salt thereof to the unmodified regenerated cellulose fibers. Thereby, the affinity with water is increased, and the water absorption and quick-drying properties are improved. In the present invention, the unmodified regenerated cellulose fibers have not been modified (processed) in the same manner as the "modification" in the modified regenerated cellulose fibers. For example, when an ethylenically unsaturated double bond and a compound having a carboxyl group (-COOH) or a salt thereof are graft-bonded to the regenerated cellulose fibers, the unmodified regenerated cellulose fibers refer to regenerated cellulose fibers to which an ethylenically unsaturated double bond and a compound having a carboxyl group (-COOH) or a salt thereof are not graft-bonded.

[0014] With respect to 100% by mass of the core-sheath structured spun yarn, the core part is preferably 15 to 35% by mass, and the sheath part is preferably 65 to 85% by mass. More preferably, the core part is 17 to 32% by mass, and the sheath part is 68 to 83% by mass. Even more preferably, the core part is 20 to 30% by mass, and the sheath part is 70 to 80% by mass. Within the above range, the balance of the ratio between the core part and the sheath part is good, and the water absorption and quick-drying properties, moisture absorption and desorption properties, and skin-fitting properties can be improved.

[0015] With respect to 100% by mass of the core-sheath structure spun yarn, it is preferable that the modified regenerated cellulose fiber is 5 to 35% by mass, the unmodified regenerated cellulose fiber is 25 to 60% by mass, the polyester fiber is 25 to 45% by mass, and the water-soluble fiber is 1 to 15% by mass. More preferably, the modified regenerated cellulose fiber is 8 to 32% by mass, the unmodified regenerated cellulose fiber is 27 to 55% by mass, the polyester fiber is 27 to 43% by mass, and the water-soluble fiber is 2 to 14% by mass. Even more preferably, the modified regenerated cellulose fiber is 10 to 30% by mass, the unmodified regenerated cellulose fiber is 30 to 50% by mass, the polyester fiber is 30 to 40% by mass, and the water-soluble fiber is 3 to 12% by mass. Within the above ranges, the overall balance is good, and the water absorption and quick-drying property, moisture absorption and desorption property, and skin-fitting property can be improved.

[0016] For the core-sheath structure spun yarn, the British cotton count is preferably 10 to 80, more preferably 15 to 78, and even more preferably 20 to 75. With this count, it is suitable for innerwear such as shirts. Also, the twist coefficient K represented by the following formula is preferably 2.8 to 6.0, more preferably 2.9 to 5.5, even more preferably 3.0 to 5.0, and even more preferably 3.0 to 4.5. Thereby, a balance between cost and yarn strength can be achieved. K = t / √S However, t: number of twists per 1 inch (2.54 cm), S: British cotton count. In addition, to convert the British cotton count to the tex count used internationally, it is calculated by the formula 590.5413 / British cotton count.

[0017] The modified regenerated cellulose fiber, unmodified regenerated cellulose fiber, polyester fiber, and water-soluble fiber all preferably have a fiber length of 30 to 45 mm. Thereby, it can be manufactured using a cotton spinning device.

[0018] The manufacturing method of the core-sheath structured spun yarn of the present invention arranges modified regenerated cellulose fibers in the core part, and arranges a blended fiber containing unmodified regenerated cellulose fibers, polyester fibers, and water-soluble fibers in the sheath part to form a core-sheath structured spun yarn. The core-sheath composite spun yarn may be a roving (fiber bundle) arranged in a core-sheath shape to form a fine spun yarn, or a fine spun twisted yarn. Generally speaking, it is easier to produce by arranging the roving in a core-sheath shape to form a fine spun yarn.

[0019] One aspect of the present invention is a woven fabric or knitted fabric containing the above-mentioned core-sheath structured spun yarn. The knitted fabric includes circular knitting, weft knitting, warp knitting (including tricot knitting and raschel knitting), pile knitting, etc., and may be any of plain knitting, gauze knitting, rib knitting, smooth knitting (double-sided knitting), rubber knitting, pearl knitting, denim weave, cord weave, atlas weave, chain weave, inserted weave, and knitted fabrics combined with these. Various interlacing methods are used to produce the knitted fabric. The interlaced knitted fabric may be warp knitting or weft knitting, and examples include tricot, raschel, circular knitting, etc. Also, the knitting structure may be any knitting structure such as half knitting, reverse half knitting, double atlas knitting, double denim knitting, and knitted fabrics combined with these. The woven fabric includes plain weave, twill weave, damask weave, and other variable weaves. Elastic yarns such as polyurethane may be added to the woven fabric or knitted fabric.

[0020] One aspect of the present invention is to remove the water-soluble fibers arranged in the sheath part of the above-mentioned woven fabric or knitted fabric with hot water. When the water-soluble fibers are removed, that part becomes a space, and the effects of the present invention can be exerted.

[0021] One aspect of the present invention is clothing containing the above-mentioned woven fabric or knitted fabric. This clothing has good water absorption and quick drying properties, moisture absorption and release properties, and skin-fitting properties, and the stickiness during sweating is improved, so it is suitable for inner clothing, sports clothing, socks, gloves, pajamas, bedding, etc. The skin-fitting property can be evaluated by the skin-fitting property test and the wet-back property described later. The wet-back property refers to the property that once the liquid taken into the fabric is difficult to return to the outside.

[0022] The mass (basis weight) per unit area of the woven or knitted fabric is preferably 80 to 500 g / m 2 more preferably 90 to 450 g / m 2 even more preferably 100 to 400 g / m 2 If the basis weight is within the above range, it is suitable as clothing.

[0023] In the present invention, a modified regenerated cellulose fiber is obtained by a grafting step. First, it is preferable to graft a carboxyl group-containing compound containing an ethylenically unsaturated double bond onto a sliver-shaped regenerated cellulose fiber (unmodified regenerated cellulose fiber) to introduce a carboxyl group (-COOH). If it is in the form of a sliver, a continuous fiber bundle (sliver) can be used for graft treatment in a continuous process.

[0024] Examples of the carboxyl group-containing compound include compounds containing one ethylenically unsaturated double bond and one or two carboxyl groups. Specifically, as the carboxyl group-containing compound, at least one carboxylic acid selected from acrylic acid, methacrylic acid, itaconic acid, maleic acid, and fumaric acid is preferable. Particularly preferably, it is at least one carboxylic acid selected from acrylic acid and methacrylic acid. When these compounds are grafted onto the surface of the regenerated cellulose fiber, moisture absorption and desorption properties can be imparted.

[0025] The grafting of the carboxyl group-containing compound onto the unmodified regenerated cellulose fiber can be carried out by a conventional method. The graft chain is introduced by, for example, irradiating the sliver-shaped regenerated cellulose fiber with an electron beam as an example to generate radicals on the surface of the regenerated cellulose fiber, contacting the generated radicals with the carboxyl group-containing compound, and grafting a carboxylic acid group as a compound group derived from the carboxyl group-containing compound onto the surface of the regenerated cellulose fiber. Various reactions such as a reaction using a catalyst for grafting are involved. Thereby, a carboxyl group is introduced into the unmodified regenerated cellulose fiber.

[0026] The amount of the carboxyl group-containing compound added is preferably 1 to 30% by mass, more preferably 5 to 20% by mass, based on the unmodified regenerated cellulose fiber. Among the modified regenerated cellulose fibers into which carboxyl groups are introduced, the mass ratio (grafting rate) of the carboxylic acid groups as the graft chains is preferably 1 to 30% by mass, more preferably 5 to 30% by mass. If the added amount is within the above range, for example, even when made into a spun yarn with unmodified fibers such as unmodified regenerated cellulose fibers and / or polyester fibers, an excellent moisture absorption and desorption function can be exhibited.

[0027] Next, taking the case of using ordinary rayon (hereinafter simply referred to as rayon) as the unmodified regenerated cellulose fiber as an example, an example of the treatment for graft bonding will be described. In the case of the continuous method, electron beams are irradiated on the rayon sliver for spinning in a nitrogen atmosphere to generate radicals on the surface of the rayon fiber, and immediately thereafter, a carboxyl group-containing compound containing an ethylenically unsaturated double bond is continuously brought into contact. The reason for bringing the carboxyl group-containing compound into contact with the surface of the rayon fiber immediately after the electron beam irradiation is to prevent the radicals generated by the electron beam irradiation from being attenuated. Since the radicals deactivate over time, it is preferable to bring the carboxyl group-containing compound into contact with the surface of the rayon fiber immediately after the electron beam irradiation.

[0028] Further, it is preferable to continuously bring the carboxyl group-containing compound into contact with the surface of the rayon fiber after the electron beam irradiation because the carboxyl group-containing compound can be efficiently brought into contact with the radicals generated on the surface of the rayon fiber. Furthermore, continuously bringing the carboxyl group-containing compound into contact with the surface of the rayon fiber is advantageous for graft bonding to the sliver for spinning of a long material. Furthermore, it is preferable to irradiate the electron beam in a nitrogen atmosphere because the generated radicals are less likely to deactivate. Regarding the electron beam irradiation method, a so-called simultaneous irradiation method in which the carboxyl group-containing compound is irradiated simultaneously with being brought into contact with the surface of the rayon fiber is also possible.

[0029] In the case of continuous processing, the shape of rayon fibers or the like irradiated with electron beams is preferably a continuous sheet shape such as a sliver or a lap. However, in the case of batch processing, it is not limited to such a continuous shape. Any method such as an immersion method or a spray method may be used to bring the carboxyl group-containing compound into contact with the surface of the rayon fiber. For example, a method of preparing an aqueous solution of a carboxyl group-containing compound and immersing the sliver in the aqueous solution, or a method of spraying the aqueous solution onto the sliver is preferable.

[0030] As described above, in the grafting step, after graft-bonding a carboxyl group-containing compound to sliver-shaped unmodified regenerated cellulose-based fibers, preferably, washing with water and then drying are performed to obtain modified regenerated cellulose-based fibers into which carboxyl groups are introduced.

[0031] First, the blended fibers containing unmodified regenerated cellulose-based fibers to be the sheath portion, polyester fibers, and water-soluble fibers are preferably prepared in the roving process before the doubling process. However, it is also possible to perform the process in the carding process (card processing), the roving process, or the spinning process. For example, it can be performed by aligning a plurality of webs, slivers, fleeces, or roving yarns respectively and stretching them at a predetermined magnification. In the roving process and the spinning process, blending can be achieved by the migration of the constituent fibers when twisting. It is also possible to set the modified regenerated cellulose-based fibers (spinning sliver) to a desired blending ratio with unmodified regenerated cellulose-based fibers (sliver) in the carding process. As an example, a thick yarn is produced with a sliver of modified regenerated cellulose-based fibers as the core and a sliver obtained by blending unmodified regenerated cellulose-based fibers, polyester fibers, and water-soluble fibers as the sheath, and then made into a spun yarn. The spun yarn may be a single yarn or a ply yarn. This spun yarn is made into a knitted fabric or a woven fabric, finished according to normal processes such as scouring and dyeing, and sewn into clothing.

[0032] The following will be described with reference to the drawings. In the following drawings, the same reference numerals indicate the same objects. FIG. 1A is a schematic side view of a core-sheath structured spun yarn 1 according to an embodiment of the present invention, and FIG. 1B is a schematic cross-sectional view taken along line I-I of FIG. 1A. In this core-sheath structured spun yarn 1, the core fiber 2 is composed of a modified regenerated cellulose fiber 2a, and the sheath fiber 3 is a blend of an unmodified regenerated cellulose fiber 3a, a polyester fiber 3b, and a water-soluble fiber 3c. The water-soluble fiber 3c is removed by heat water treatment such as scouring and dyeing after being made into a woven fabric or a knitted fabric, creating a corresponding space.

Example

[0033] The present invention will be described in more detail with the following examples. It should be noted that the present invention is not limited to the following examples. <Moisture content test during moisture absorption and desorption> (1) Collect a sample knitted fabric (knitted fabric) measuring 15 cm × 15 cm, dry the test piece to a completely dry state (105 °C × 1 h: using a vacuum dryer), and measure the mass... W0 (2) Absorb moisture under 20 °C × 90% RH and measure the mass of the sample at any time... W (3) Desorb moisture under 20 °C × 20% RH and measure the mass of the sample at any time... W (4) Calculate the moisture content and ΔMR at any time using the following formula Moisture content [%] = [(W - W0) / W0] × 100 ΔMR = Moisture content during moisture absorption - Moisture content during moisture desorption It can be said that the greater the ΔMR, the better the moisture absorption and desorption performance. Note that the moisture content was measured before washing. The household washing conforms to the JIS L 1930 C4G method. <Water absorption (Bireck method)> The water uptake height was measured by the Bireck evaluation method of JIS L1907 5.1.2 (2010). The higher the numerical value, the better. <Quick-drying property> According to the diffusible residual moisture rate test method of JIS L1907 5.1.2 (2010), a 15 cm × 15 cm sample was cut out from the knitted fabric conditioned at 20°C × 65% RH for 1 day, and the initial weight (W0) was determined. 0.6 ml of water droplets were measured with a precision balance and absorbed by the sample. After that, the weight (W t ) was measured every 5 minutes, and the time when the moisture rate calculated by the formula: diffusible residual moisture rate of 0.6 ml (%) = { (W t -W0) / 0.6} × 100 was less than 10% was defined as the drying time (minutes). It can be said that the shorter the drying time, the higher the quick-drying property. The "quick-drying standard" is set as the quick-drying standard for 100% cellulose fabric: 75 minutes, and the quick-drying standard for 100% synthetic fiber fabric: 55 minutes. The quick-drying standards for each material are calculated by proportional calculation from the cellulose mixing ratio (rayon mixing ratio) of each material. <Skin-fitting property> A hard plastic plate was attached to the lower gripping part of the tensile testing machine. A 5 cm × 5 cm test piece was placed on it so that air could not enter. In addition, 0.5 ml of water was dropped onto the center of the test cloth to make it adhere more closely. From this state, the thread attached to the center of the test piece was pulled at the upper gripping part, and the maximum load (mN) when the test piece separated from the hard plastic was measured. The gripping interval was 100 mm, and the pulling speed was 300 mm / min. The lower the numerical value, the better. <Wet-back property> 0.1 ml of water was dropped onto a 5 cm × 5 cm test piece. After 10 seconds of dropping, a "filter paper" was placed on the center of the dropping point, and a load of 50 g / cm 2 (1.25 kgf) was applied. After another 10 seconds, the weight of the "filter paper" was measured, and the amount of water absorbed by the "filter paper" was determined. Water absorption [g] = weight of the wet "filter paper" - initial load of the "filter paper" Wet-back property [%] = water absorption [g] / 0.1 [g] (amount of water dropped) The lower the numerical value, the better.

[0034] (Example 1) <Composition of the whole thread> · Core: 25 mass% of modified rayon, · Sheath: 35% by mass of unmodified rayon + 35% by mass of polyester + 5% by mass of water-soluble vinylon <Graft processing of sliver> The spinning sliver (mass per unit length, unit geren: 300 g / 6 yd (55 g / m)) after the comber process made of ordinary rayon (single fiber fineness 1.4 dtex, fiber length 38 mm) was continuously supplied to an electro-curtain type electron beam irradiation device EC250 / 15 / 90L (manufactured by Iwasaki Electric Co., Ltd.), and irradiated with an electron beam at 25 kGy and an accelerating voltage of 200 keV in a nitrogen atmosphere in the device. The electron beam-irradiated sliver was continuously immersed in a 15% by mass aqueous solution of acrylic acid (manufactured by Nacalai Tesque, Inc.), and squeezed with a mangle to achieve a pickup rate of about 100% by mass with respect to the sliver weight. The sliver was aged for 10 minutes, and then continuously washed with water to remove unreacted acrylic acid, oiled with a normal spinning oil agent, then dried at 80 °C and coiled and stored in a container. The sliver thus obtained is called "grafted rayon". 10% by mass of acrylic acid was bonded to this grafted rayon. <Production of spun yarn> Using grafted rayon as the core component and ordinary rayon (single fiber fineness 1.3 dtex, fiber length 38 mm), polyester staple fiber (single fiber fineness 1.3 dtex, fiber length 38 mm), and water-soluble vinylon (manufactured by Kuraray Co., Ltd., dissolution temperature 70 °C, single fiber fineness 1.7 dtex, fiber length 32 mm), a core-sheath spun yarn of 47 counts was produced. Grafted rayon: ordinary rayon: polyester: water-soluble vinylon = 25:35:35:5 (weight ratio) was used. Ordinary rayon, polyester, and water-soluble vinylon as the sheath component were passed through the processes of mixing cotton and carding to obtain a sliver. The grafted rayon of the core component was arranged with the sliver of the sheath component so as to have a predetermined mixing ratio in the drawing process and to form a core-sheath structure, and a core-sheath spun yarn was obtained through the roving process and the spinning process. This core-sheath spun yarn was of English cotton count 47 and had a twist coefficient K = 4.2. <Woven fabric> Using the core-sheath spun yarn, a circular knitted fabric was produced on a circular knitting machine. The obtained knitted fabric had a basis weight of 334 g / m 2 . <Post-treatment of knitted fabric> The knitted fabric was left standing in water at 90°C at a bath ratio of 1:20 for 20 minutes, then drained, rinsed once with hot water, dehydrated, and dried to elute the water-soluble vinylon. Thereafter, the knitted fabric was finished by a conventional method. The composition of the treated knitted fabric was rayon (grafted rayon + ordinary rayon): polyester = 63:37 by mass ratio.

[0035] (Comparative Example 1) As Comparative Example 1, the same procedure as in Example 1 was carried out except that a uniform blended yarn of ordinary rayon (regular rayon): polyester = 63:37 was used. When the moisture content ratio test of the knitted fabric obtained as described above was conducted during moisture absorption and desorption, the results shown in FIGS. 2 and 3 were obtained. FIG. 2 is a graph showing the moisture content ratio before washing of Example 1 and Comparative Example 1, and FIG. 3 is a graph showing the moisture content ratio after 10 washes of Example 1 and Comparative Example 1. The measurement results with the maximum moisture content ratio difference (ΔMR) are shown in Tables 1 to 2.

[0036] [Table 1]

[0037] [Table 2]

[0038] From the above, it was confirmed that the knitted fabric of Example 1 had high moisture absorption and desorption properties.

[0039] (Example 2) A core-sheath spun yarn (English cotton count 38 single yarn) produced in the same manner as in Example 1 and a polyester multifilament false-twisted yarn (fineness 84 dtex, number of fibers 72) were interwoven to form a knitted fabric with a herringbone weave. The obtained knitted fabric had a basis weight of 130 g / m 2 . Otherwise, the same procedure as in Example 1 was carried out.

[0040] (Example 3) A core-sheath spun yarn (single yarn of English cotton count 60) produced in the same manner as in Example 1 and a polyester multifilament false-twisted yarn (fineness 84 dtex, number of fibers 72) were interwoven to form a knitted fabric of a twill weave. A polyurethane filament yarn (fineness 22 dtex) was used as a bare yarn, and full-needle broaching knitting was performed. The obtained knitted fabric had a basis weight of 130 g / m 2 . Other operations were carried out in the same manner as in Example 1.

[0041] (Example 4) A core-sheath spun yarn (single yarn of English cotton count 47) produced in the same manner as in Example 1 and a polyester multifilament false-twisted yarn (fineness 84 dtex, number of fibers 72) were interwoven to form a knitted fabric of a milling weave. The obtained knitted fabric had a basis weight of 138 g / m 2 . Other operations were carried out in the same manner as in Example 1.

[0042] (Comparative Example 2) A knitted fabric of a milling weave was formed using a uniform blended spun yarn of 63.9% by mass of cotton fiber and 36.1% by mass of polyester staple fiber. The obtained knitted fabric had a basis weight of 130 g / m 2 . Other operations were carried out in the same manner as in Example 1.

[0043] The results of the knitted fabrics of Examples 2 to 4 and Comparative Example 2 are summarized in Table 3. In Table 3, PE represents polyester, RY represents rayon, PU represents polyurethane, and CO represents cotton. Figure 4 is a graph showing the water absorbency (bilegged method) of Examples 2 to 4 and Comparative Example 2 of the present invention. Figure 5 is a graph showing the quick-drying property of Examples 2 to 4 and Comparative Example 2 of the present invention. Figure 6 is a graph showing the moisture absorption and desorption property of Examples 2 to 4 and Comparative Example 2 of the present invention. Figure 7 is a graph showing the skin-fitting property of Examples 2 to 4 and Comparative Example 2 of the present invention. Figure 8 is a graph showing the wet-back property of Examples 2 to 4 and Comparative Example 2 of the present invention.

[0044]

Table 3

[0045] As shown in Table 3 and FIGS. 4 to 8, the knitted fabrics of Examples 2 to 4 were all superior to the knitted fabric of Comparative Example 2 in terms of water absorbency, quick-drying property, moisture absorption and desorption property, skin-fitting property, and wet-back property. From the above, it was confirmed that the fabric has good water absorption and quick-drying properties, moisture absorption and desorption properties, and skin-fitting property, and can improve the stickiness during sweating.

Industrial Applicability

[0046] The fabric of the present invention is suitable for inner clothing such as shirts, pants, tights, and socks. It is also suitable for T-shirts, sports shirts, etc.

Explanation of Symbols

[0047] 1 Core-sheath structured spun yarn 2 Core fibers 2a Modified regenerated cellulose-based fiber 3 Sheath fibers 3a Unmodified regenerated cellulose-based fiber 3b Polyester fiber 3c Water-soluble fiber

Claims

1. A core-sheath structured spun yarn, wherein the core part contains modified regenerated cellulose fibers, the sheath part is a blended fiber containing unmodified regenerated cellulose fibers, polyester fibers, and water-soluble fibers, the modified regenerated cellulose fibers are characterized in that a compound having an ethylenically unsaturated double bond and a carboxyl group (-COOH) or a salt thereof is graft-bonded to the unmodified regenerated cellulose fibers. A core-sheath structured spun yarn.

2. The core-sheath structured spun yarn according to Claim 1, wherein, based on 100% by mass of the core-sheath structured spun yarn, the core part is 15 to 35% by mass and the sheath part is 65 to 85% by mass.

3. The core-sheath structured spun yarn according to Claim 1, wherein, based on 100% by mass of the core-sheath structured spun yarn, the modified regenerated cellulose fibers are 5 to 35% by mass, the unmodified regenerated cellulose fibers are 25 to 60% by mass, the polyester fibers are 25 to 45% by mass, and the water-soluble fibers are 1 to 15% by mass.

4. The core-sheath structured spun yarn according to Claim 1, wherein the core-sheath structured spun yarn has an English cotton count of 10 to 80 and a twist coefficient K represented by the following formula is 2.8 to 6.

0. K = t / √S However, t: the number of twists per inch (2.54 cm), S: the English cotton count.

5. The core-sheath structured spun yarn according to Claim 1, wherein each of the modified regenerated cellulose fibers, unmodified regenerated cellulose fibers, polyester fibers, and water-soluble fibers has a fiber length of 30 to 45 mm.

6. The core-sheath structured spun yarn according to Claim 1, which has moisture absorption and desorption properties and quick-drying properties.

7. A method for manufacturing a core-sheath structured spun yarn according to any one of Claims 1 to 6, wherein modified regenerated cellulose fibers are arranged in the core part, unmodified regenerated cellulose fibers, polyester fibers, and a blended fiber containing water-soluble fibers are arranged in the sheath part to form a core-sheath structured spun yarn. A method for manufacturing a core-sheath structured spun yarn.

8. A woven fabric or knitted fabric containing the core-sheath structured spun yarn according to any one of Claims 1 to 6.

9. A method for manufacturing a woven fabric or knitted fabric according to Claim 8, characterized in that the water-soluble fibers arranged in the sheath part are removed by hot water. A method for manufacturing a fabric.

10. Clothing containing the woven fabric or knitted fabric according to Claim 8.

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