Moisture-absorbing and heat-generating fabric and moisture-absorbing and heat-generating clothing using the same

Abstract

To provide moisture-absorbing and heat-generating clothing which has improved moisture-absorbing and heat-generating properties of cotton fabric, has good adhesion to the body, is comfortable to wear, and is gentle on the skin. The moisture-absorbing fabric and moisture-absorbing clothing of the present invention comprise a blended spun yarn (A) containing a moisture-absorbing, heat-generating cellulosic fiber (a1) and a non-moisture-absorbing, heat-generating cellulosic fiber (a2), and a spun yarn (B1) composed of a non-moisture-absorbing, heat-generating cellulosic fiber, wherein the moisture-absorbing, heat-generating cellulosic fiber (a1) accounts for 5 to 40 mass% of the fabric as 100 mass%, and may further contain 3 to 15 mass% of elastic yarn (C).

Description

[Technical Field]

[0001] The present invention relates to a moisture-absorbing and heat-generating fabric whose main fiber is a cellulosic fiber such as cotton, and to a moisture-absorbing and heat-generating garment using the same. [Background technology]

[0002] Hygroscopic heat generation is the property of dry fibers that generates heat when they absorb moisture (water). For example, if you bring a futon that has been exposed to the sun during the day into a room, even if it has cooled to room temperature after a few hours, it will still feel warm when you put your skin against it.

[0003] As a conventional method for producing moisture-absorbing and heat-generating fibers, Patent Document 1 below proposes a highly moisture-absorbing and desorbing fiber obtained by subjecting acrylic fibers to hydrazine crosslinking, hydrolysis, and conversion of carboxyl groups to salt forms. However, these proposals involve modifying the acrylic fibers themselves, making it difficult to apply them to other fibers. The present applicant has also proposed a composite spun yarn in which animal hair fibers are used as the core component and cellulose fibers or the like are arranged as the sheath component (Patent Document 2 below). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-089971 [Patent Document 2] Patent No. 3889652 Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, cotton has been rediscovered as an inner garment such as underwear, and there is a demand from the market for cotton to absorb moisture and generate heat, but conventional technology has not been able to meet this demand. To solve the above-mentioned conventional problems, the present invention provides a moisture-absorbing and heat-generating fabric and moisture-absorbing and heat-generating clothing which improves the moisture-absorbing and heat-generating properties of cotton fabric, adheres well to the body, is comfortable to wear, and is gentle on the skin. [Means for solving the problem]

[0006] The first moisture-absorbing and heat-generating fabric of the present invention is a moisture-absorbing and heat-generating fabric comprising a blended spun yarn (A) containing a moisture-absorbing and heat-generating processed cellulosic fiber (a1) and a non-moisture-absorbing and heat-generating processed cellulosic fiber (a2), and a spun yarn (B1) composed of a non-moisture-absorbing and heat-generating processed cellulosic fiber, characterized in that when the fabric is taken as 100% by mass, the moisture-absorbing and heat-generating processed cellulosic fiber (a1) accounts for 5 to 40% by mass.

[0007] The second moisture-absorbing and heat-generating fabric of the present invention is a moisture-absorbing and heat-generating fabric comprising a blended spun yarn (A) containing a cellulose-based fiber (a1) that has been subjected to moisture-absorbing and heat-generating processing and a cellulose-based fiber (a2) that has not been subjected to moisture-absorbing and heat-generating processing, a spun yarn (B) composed of a cellulose-based fiber that has not been subjected to moisture-absorbing and heat-generating processing, and an elastic yarn (C), characterized in that when the fabric is taken as 100% by mass, the moisture-absorbing and heat-generating processed cellulose-based fiber (a1) accounts for 5 to 40% by mass. Furthermore, the present invention provides a moisture-absorbing, heat-generating fabric comprising a blended spun yarn (A) containing a cellulose-based fiber (a1) that has been moisture-absorbing and heat-generating processed and a cellulose-based fiber (a2) that has not been moisture-absorbing and heat-generating processed, a spun yarn (B) composed of a cellulose-based fiber that has not been moisture-absorbing and heat-generating processed, and an elastic yarn (C), characterized in that, when the fabric is taken as 100% by mass, the moisture-absorbing and heat-generating processed cellulose-based fiber (a1) is 5 to 40% by mass, the total amount of the cellulose-based fibers (A+B) is 85 to 97% by mass, and the elastic yarn (C) is 3 to 15% by mass.

[0008] The first moisture-absorbing and heat-generating clothing of the present invention is clothing sewn from the first moisture-absorbing and heat-generating fabric. A second moisture-absorbing and heat-generating garment of the present invention is a garment sewn from the second moisture-absorbing and heat-generating fabric, characterized in that the elastic threads are arranged in the circumferential direction of the body. [Effects of the Invention]

[0009] The first and second moisture-absorbing and heat-generating fabrics and the first and second clothing of the present invention contain 5 to 40 mass% of the moisture-absorbing and heat-generating processed cellulosic fibers, thereby improving the moisture-absorbing and heat-generating properties of the cotton fabric, providing good adhesion to the body, and providing moisture-absorbing and heat-generating fabrics and clothing that are comfortable to wear and gentle on the skin. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a front view of an inner garment according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention relates to a moisture-absorbing, heat-generating fabric comprising a blended spun yarn (A) containing a moisture-absorbing, heat-generating cellulosic fiber (a1) and a non-moisture-absorbing, heat-generating cellulosic fiber (a2), and a spun yarn (B) composed of a non-moisture-absorbing, heat-generating cellulosic fiber. The moisture-absorbing, heat-generating cellulosic fiber (a1) accounts for 5 to 40% by mass of the fabric (based on 100% by mass). Cellulosic fibers such as cotton and rayon have moisture-absorbing and heat-generating properties (see "Encyclopedia of Fibers," by Tatsuya Motomiya et al., left column, p. 830, March 25, 2002, Maruzen). This allows for the creation of moisture-absorbing, heat-generating clothing that is both moderately moisture-absorbing and heat-generating and durable to washing. Furthermore, the moisture-absorbing and heat-generating fabric includes a blended spun yarn (A) containing a cellulose-based fiber (a1) that has been moisture-absorbing and heat-generating processed and a cellulose-based fiber (a2) that has not been moisture-absorbing and heat-generating processed, a spun yarn (B) composed of a cellulose-based fiber that has not been moisture-absorbing and heat-generating processed, and an elastic yarn (C), where, when the fabric is taken as 100% by mass, the moisture-absorbing and heat-generating processed cellulose-based fiber (a1) is 5 to 40% by mass, the total amount of cellulose-based fibers (A+B) is 85 to 97% by mass, and the elastic yarn (C) is 3 to 15% by mass. This allows for the realization of a moisture-absorbing and heat-generating garment that has appropriate moisture-absorbing and heat-generating properties and is resistant to deformation even after repeated washing.

[0012] Furthermore, by blending 5 to 40% by mass of the moisture-absorbing and heat-generating processed cellulose fiber (a1), damage to the cellulose fiber during the moisture-absorbing and heat-generating processing can be compensated for by the untreated cellulose fiber. When the fabric is taken as 100% by mass, the moisture-absorbing and heat-generating processed cellulose fiber (a1) is preferably 5 to 30% by mass, more preferably 6 to 20% by mass. Furthermore, the ratio of the total amount of cotton (A+B) to the elastic yarn is preferably 88:12 to 94:6 by mass, more preferably 90:10 to 95:5 by mass.

[0013] The moisture-absorbing and heat-generating cellulosic fiber (a1) is preferably a cellulosic fiber to which a compound containing an ethylenically unsaturated double bond (a compound having a functional group with moisture-absorbing and heat-generating properties) has been grafted. Examples of the compound containing an ethylenically unsaturated double bond include a compound containing one ethylenically unsaturated double bond and one or two carboxylic acid groups. Specifically, at least one carboxylic acid selected from acrylic acid, methacrylic acid, itaconic acid, maleic acid, and fumaric acid, or an ester or salt thereof, is preferred. Chemically bonding these compounds to the cotton surface can impart wash-resistant moisture-absorbing and heat-generating properties. The graft bond is formed through various reactions, including a reaction in which radicals are generated on the cellulosic fiber surface by irradiation with an electron beam, a reaction in which the generated radicals are grafted to the cellulosic fiber surface by contacting a compound having an ethylenically unsaturated double bond containing a functional group (-OH, -NH, etc.), and a reaction in which the active group reacts with a carboxylic acid group (-COOH) to form a covalent bond. The compound containing an ethylenically unsaturated double bond is preferably added in an amount of 1 to 30% by mass, more preferably 5 to 20% by mass, based on the cellulosic fiber. Within this range, the compound can exhibit its moisture-absorbing and heat-generating function even when blended with untreated cotton.

[0014] In blended spun yarn (A) containing cellulosic fibers (a1) that have been subjected to moisture absorption and heat generation processing and cellulosic fibers (a2) that have not been subjected to moisture absorption and heat generation processing, (a1) is usually 8 to 50 mass% and (a2) is 50 to 92 mass%, preferably 10 to 45 mass% and (a2) is 55 to 90 mass%.

[0015] The moisture-absorbing and heat-generating fabric of the present invention contains the blended spun yarn (A) and a spun yarn (B) composed of cellulosic fibers that have not been treated for moisture absorption and heat generation. For example, in the case of a knitted fabric suitable for innerwear, if three repeating units are used, one of which is blended spun yarn (A) containing 30% by mass of (a1) and the other two are untreated cotton spun yarn (B), then a fabric containing 10% by mass of the moisture-absorbing and heat-generating cellulosic fibers (a1) will be obtained, based on the fabric as 100% by mass.

[0016] The fabric is preferably a knitted or woven fabric. Knitted fabrics and woven fabrics are suitable for use as innerwear. Knitted fabrics are particularly stretchy and flexible, making them suitable for use as innerwear. It is preferable that one or two out of every three yarns constituting the fabric be the blended spun yarn, and the remaining yarn be a cotton spun yarn that has not been subjected to moisture-absorbing and heat-generating processing. Knitted fabrics may be of any weave, including circular knitting, weft knitting, warp knitting (including tricot knitting and raschel knitting), and pile knitting, as well as plain knitting, jersey knitting, rib knitting, smooth knitting (double knitting), rib knitting, purl knitting, Denbigh knitting, cord knitting, atlas knitting, chain knitting, insertion knitting, and woven fabrics combining these. Various interlacing methods are used to produce knitted fabrics. Interlacing knitted fabrics may be warp knitting or weft knitting, examples of which include tricot, raschel knitting, and circular knitting. Furthermore, the knitting structure may be any weave, including half knitting, reverse half knitting, double atlas knitting, double Denbigh knitting, and knitting structures combining these. Examples of woven fabrics include plain weave, twill weave, satin weave, varied plain weave, varied twill weave, varied satin weave, variegated weave, patterned weave, single-ply weave, double weave, multi-ply weave, warp pile weave, weft pile weave, leno weave, and combinations thereof. Among these, weft knitted fabrics including circular knitting, or warp knitted fabrics are preferred.

[0017] The mass per unit area of ​​the fabric is 80 to 300 g / m 2 is preferable, and more preferably 90 to 250 g / m 2 and more preferably 100 to 200 g / m 2 If it is in the above range, it is suitable for use as innerwear.

[0018] The elastic yarn is preferably at least one selected from polyurethane yarn and conjugate yarn obtained by conjugation spinning of at least two polymers with different shrinkage rates. The polyurethane elastic yarn may be any type, as long as it is made from polymer diol and diisocyanate as starting materials, and is not particularly limited. The conjugate yarn is a conjugated yarn obtained by conjugation spinning of at least two polymers with different shrinkage rates. The conjugate yarn exhibits crimp from the raw yarn stage, but upon application of heat, it exhibits even greater crimp. Specifically, a conjugate yarn (bicomponent yarn) of polyethylene terephthalate (PET) and polytrimethylene terephthalate (PTT) is preferred. Examples of such latent crimp-type stretch yarns include "Lycra T400" manufactured by Toray Opelontex, "Spandy" manufactured by KB Seiren, and "Z10" manufactured by Unitika. The commonly used elastic yarn is polyurethane yarn.

[0019] For example, in the case of weft-knitted or circular-knitted fabrics, it is preferable to use bare spandex yarn as a plating yarn for loop yarns, while in the case of warp-knitted fabrics, bare spandex yarn is inserted by inserting the yarn into the weft or by weft insertion. For so-called innerwear, circular knitting is usually used, and elastic yarn, particularly polyurethane elastic yarn, is used as a plating yarn for loop yarns. Polyurethane elastic yarn is usually inserted as a plating yarn in a state where it is stretched about 2.5 times its original length, with a yarn size of 20 to 40 decitex.

[0020] Clothing sewn with the moisture-absorbing and heat-generating fabric of the present invention has elastic threads arranged in the circumferential direction of the body. So-called one-way stretch fabrics are preferred. The circumferential direction of the body refers to the circumferential direction of the torso and the arms. This results in innerwear that is comfortable to wear and does not easily lose its shape even after repeated washing. This clothing is preferably a shirt or pants. The innerwear of the present invention has cotton as the main fiber at 85% by mass or more, preferably 88% by mass or more, and more preferably 90% by mass or more, and is gentle on the skin.

[0021] Next, the manufacturing method of the present invention will be described using cotton (natural cellulose fiber) as the cellulosic fiber. In a continuous process, a cotton sliver for spinning is irradiated with an electron beam under a nitrogen atmosphere to generate radicals on the cotton fiber surface, and immediately thereafter, a compound containing an ethylenically unsaturated double bond is continuously contacted with the cotton fiber surface. The reason for contacting the cotton fiber surface with the compound containing an ethylenically unsaturated double bond immediately after electron beam irradiation is to prevent the radicals generated by the electron beam irradiation from decaying. Because radicals tend to decay over time, it is preferable to contact the cotton fiber surface with the compound containing an ethylenically unsaturated double bond immediately after electron beam irradiation. Furthermore, continuous contact of the cotton fiber surface with the compound containing an ethylenically unsaturated double bond after electron beam irradiation is preferable because it allows the compound containing an ethylenically unsaturated double bond to effectively contact the radicals generated on the cotton fiber surface. Furthermore, continuous processing is advantageous for treating long spinning slivers. Furthermore, electron beam irradiation under a nitrogen atmosphere is preferable because the generated radicals are less likely to be deactivated.

[0022] The method for contacting the compound containing an ethylenically unsaturated double bond with the surface of cotton fibers may be any method such as immersion or spraying. For example, it is preferable to prepare an aqueous solution of the compound containing an ethylenically unsaturated double bond and then immerse the sliver in the solution or spray the solution onto the sliver.

[0023] In the present invention, a spun yarn having moisture-absorbing and heat-generating properties is obtained by blending and fine-spinning the treated spinning sliver with other untreated slivers. Blending is usually preferably performed using a drawing process that includes a doubling step. However, blending is also possible using a carding process, roving process, or fine-spinning process. The blending is achieved by aligning multiple webs, slivers, fleeces, and roving yarns and stretching them to a predetermined ratio. In the roving and fine-spinning processes, blending is achieved by migration of the constituent fibers during twisting. Furthermore, the treated spinning sliver can be returned to the blending process to achieve the desired blend ratio.

[0024] After blending the moisture-absorbing, heat-generating cotton with the non-moisture-absorbing, heat-generating cotton, the blended spun yarn (A) is made according to a conventional method. The non-moisture-absorbing, heat-generating cotton spun yarn is also made according to a conventional method into spun yarn (B). A predetermined amount of the blended spun yarn (A), spun yarn (B), and elastic yarn (C) is used to make a moisture-absorbing, heat-generating fabric. This fabric can optionally be post-processed, such as bleached, dyed, or softened, according to conventional methods.

[0025] 1 is a front view of an inner garment 1 according to one embodiment of the present invention. This inner garment 1 is an example of a long-sleeved shirt. Elastic yarns are arranged in the circumferential direction of the body, i.e., in the circumferential direction of the torso (arrow 2) and in the circumferential direction of the arms (arrow 3). [Example]

[0026] The present invention will be described in more detail below with reference to examples, although the present invention is not limited to the following examples.

[0027] <Hygroscopic heat generation> (1) A sample of fabric (knitted fabric) is taken to a size of 20 cm x 20 cm, dried in a dryer for 4 hours, and left overnight in a desiccator containing silica gel. (2) The treated sample is folded in half, a thermocouple temperature sensor is attached to the center, and the sample is folded in half again to form a test specimen. (3) After treating the test specimen in a thermo-hygrostat at 20°C and 40% RH for 2 hours, the thermo-hygrostat settings are changed to 20°C and 90% RH, and the temperature change is measured every minute for 15 minutes. (4) A knitted fabric (Comparative Example 1) made from 50-count cotton yarn using untreated cotton sliver is used as the reference fabric, and the difference between the maximum temperature of the reference fabric and the maximum temperature of the example fabric over the 15-minute measurement period is calculated as the maximum temperature difference (°C).

[0028] Example 1 <Sliver processing> A cotton sliver (mass per unit length, unit grain: 25.0 g / 6 yd (4.6 g / m)) was irradiated four times with 15 kGy of electron beam using an electrocurtain-type electron beam irradiation device EC250 / 30 / 90L (manufactured by Iwasaki Electric Co., Ltd.). The irradiated sliver was immediately immersed in a 32% by weight aqueous solution of acrylic acid (manufactured by Nacalai Tesque, Inc.) containing 0.4% by weight of a penetrant and squeezed with a mangle to achieve a pickup rate of approximately 100% by weight of the sliver. The sliver was then continuously heat-treated with steam at 100°C for 10 minutes. The sliver was then washed with water to remove unreacted acrylic acid, dried at 80°C, and coiled and stored in a container. The resulting sliver is referred to as "treated cotton." This treated cotton contained 8% by weight of acrylic acid bound to it. <Spun yarn> (1) Blended yarn containing treated cotton The treated cotton and untreated cotton were blended in a blending process to spin a yarn having a cotton count of 50. The proportion of treated cotton in the blended yarn was set to 30% by weight. (2) Untreated cotton yarn Untreated cotton sliver was used to spin a 50 count cotton yarn. <Knitting> A blended yarn containing the treated cotton and an untreated cotton yarn Thread The blended yarn containing treated cotton was used as the feed yarn in a ratio of two untreated cotton spun yarns to one treated cotton blend yarn, and a plain knit fabric was knitted on a circular knitting machine. The proportion of treated cotton in the fabric was 10% by mass. <Bleaching, dyeing> The resulting knitted fabric was bleached and dyed in the usual manner. <Sewing> The knitted fabric obtained as described above was used to sew a long-sleeved shirt as an inner garment. . profit The long-sleeved shirt used as innerwear is shown in Figure 1. The weight of one shirt was 145g (men's size L).

[0029] Example 2 <Spun yarn> The spun yarn containing the treated cotton used in Example 1 and untreated cotton spun yarn were used. <Elastic thread> A commercially available polyurethane elastic thread, product 22decitex, was used. <Knitting> The blended yarn containing the treated cotton, the untreated cotton spun yarn, and the elastic yarn were used, and the blended yarn containing the treated cotton was used as the feed yarn in a ratio of two untreated cotton spun yarns to one treated cotton yarn, and the elastic yarn was inserted so that it accounted for 7% by mass of the fabric. The elastic yarn was inserted as a plated yarn to each of the yarns in a state where it was stretched 2.5 times its original size with tension applied. A plain knit fabric was knitted using a circular knitting machine. <Bleaching, dyeing> The resulting knitted fabric was bleached and dyed in the usual manner. <Sewing> The knitted fabric obtained in this manner was used to sew a long-sleeved shirt as innerwear. The elastic yarn was sewn around the body. The resulting long-sleeved shirt as innerwear is shown in Figure 1. The weight of one shirt was 170 g for a men's size L.

[0030] Example 3 The blended yarn containing the treated cotton of Example 1, the untreated cotton spun yarn, and the elastic yarn were used as the feed yarns, with the blended yarn containing the treated cotton being used in a ratio of one untreated cotton spun yarn to two blended yarns containing the treated cotton, and a plain knit fabric was knitted using a circular knitting machine. The proportion of treated cotton in the fabric was: 19 It is expressed as mass %.

[0031] (Comparative Example 1) The same procedure as in Example 1 was carried out except that no treated cotton was used. The above results are summarized in Table 1.

[0032] [Table 1]

[0033] As is clear from Table 1, Examples 1 to 3 had high moisture absorption and heat generation properties. Furthermore, a wearing test confirmed that Examples 2 and 3 had good adhesion to the body, were comfortable to wear, and were gentle on the skin. [Industrial Applicability]

[0034] The moisture-absorbing and heat-generating fabric of the present invention and the moisture-absorbing and heat-generating clothing using the same are suitable for innerwear such as shirts, pants, etc. Furthermore, since they are gentle on the skin, they are also suitable for T-shirts and the like. [Explanation of symbols]

[0035] 1. Innerwear 2. Around the fuselage 3 Arm circumference

Claims

1. A moisture-absorbing and heat-generating fabric for innerwear, comprising a blended spun yarn (A) containing moisture-absorbing and heat-generating cotton fibers (a1) and non-moisture-absorbing and heat-generating cotton fibers (a2), and a spun yarn (B) made of non-moisture-absorbing and heat-generating cotton fibers, When the fabric is taken as 100% by mass, the moisture-absorbing and heat-generating processed cotton fiber (a1) is 5 to 30% by mass, When the fabric is taken as 100% by mass, the total amount of cotton fibers in the blended spun yarn (A) and the spun yarn (B) is 100% by mass, In the blended spun yarn (A), the moisture-absorbing and heat-generating processed cotton fiber (a1) accounts for 10 to 45 mass %, and the non-moisture-absorbing and heat-generating processed cotton fiber (a2) accounts for 55 to 90 mass %, The moisture-absorbing and heat-generating cotton fiber (a1) is a cotton fiber to which a compound having an ethylenically unsaturated double bond and a functional group having moisture-absorbing and heat-generating properties has been grafted, The fabric is a knitted fabric, and the ratio of the number of threads of the blended spun yarn (A) and the number of threads of the spun yarn (B) constituting the fabric is 1:2 to 2:

1.

2. The moisture-absorbing and heat-generating fabric for innerwear according to claim 1, wherein the moisture-absorbing and heat-generating cotton fiber (a1) is 6 to 20% by mass when the fabric is taken as 100% by mass.

3. The fabric is a circular knit fabric and has a mass per unit area of ​​80 to 300 g / m 2 3. The moisture-absorbing and heat-generating fabric for innerwear according to claim 1 or 2, wherein

4. A moisture-absorbing and heat-generating fabric for innerwear, comprising a blended spun yarn (A) containing moisture-absorbing and heat-generating cotton fiber (a1) and non-moisture-absorbing and heat-generating cotton fiber (a2), a spun yarn (B) composed of non-moisture-absorbing and heat-generating cotton fiber, and an elastic yarn (C), When the fabric is taken as 100% by mass, the moisture-absorbing and heat-generating processed cotton fiber (a1) is 5 to 30% by mass, When the fabric is taken as 100% by mass, the total amount of cotton fiber in the blended spun yarn (A) and the spun yarn (B) is 85 to 97% by mass, and the elastic yarn (C) is contained in an amount of 3 to 15% by mass, In the blended spun yarn (A), the moisture-absorbing and heat-generating processed cotton fiber (a1) accounts for 10 to 45 mass %, and the non-moisture-absorbing and heat-generating processed cotton fiber (a2) accounts for 55 to 90 mass %, The moisture-absorbing and heat-generating cotton fiber (a1) is a cotton fiber to which a compound having an ethylenically unsaturated double bond and a functional group having moisture-absorbing and heat-generating properties has been grafted, The fabric is a knitted fabric, and the ratio of the number of threads of the blended spun yarn (A) and the number of threads of the spun yarn (B) constituting the fabric is 1:2 to 2:

1.

5. 5. The moisture-absorbing and heat-generating fabric for innerwear according to claim 4, wherein the elastic yarn is polyurethane yarn.

6. 6. The moisture-absorbing and heat-generating fabric for innerwear according to claim 4 or 5, wherein the elastic yarn is inserted into the knitting yarn of the circular knit fabric as a loop yarn.

7. The moisture-absorbing and heat-generating fabric for innerwear according to any one of claims 1 to 6, wherein the innerwear is a shirt or pants.

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