Yarn, fabric, and clothing

Abstract

To provide a yarn having an excellent ability to hide sweat marks on fabric, and fabric and clothing using the yarn. [Solution] The yarn includes a fiber body 1, which includes a core layer 10 and a sheath layer 20. The sheath layer 20 is provided on the outer periphery of the core layer 10 and includes a diffuse reflective material 30, at least a portion of which is exposed on the surface of the sheath layer 20 to form a plurality of diffuse reflective sections 11. The core layer 10 includes the diffuse reflective material 30, and the content of the diffuse reflective material 30 in the core layer 10 is equal to or greater than the content of the diffuse reflective material 30 in the sheath layer 20. The diffuse reflective sections 11 have a shape in which the diffuse reflective material 30 protrudes from the surface of the sheath layer 20 and / or a shape in which the diffuse reflective material 30 is recessed into the sheath layer 20, causing a depression in the surface of the sheath layer 20, and a plurality of diffuse reflective sections 11 are provided at intervals on the surface of the sheath layer 20.

Description

[Technical Field]

[0001] The present invention relates to the textile technology field, and more particularly to yarns, fabrics, and garments. [Background technology]

[0002] 2. Description of the Related Art As people's living standards improve and their awareness of exercise and health increases, there is an increasing demand for the functionality of everyday clothing, especially sportswear.

[0003] When you sweat during exercise or in a hot environment, the sweat remains on the surface of your clothes, forming noticeable sweat marks that make your clothes look less clean.

[0004] There are two main reasons why sweat marks appear. The first reason is due to the optical properties of the fabric material: when sweat remains on the surface of the fabric, specular reflection occurs when light is shone on it, making some areas of the garment darker and some areas shiny, creating visible sweat marks. The second reason is that the fabric has low moisture absorption and diffusion capabilities, which means it cannot effectively absorb sweat and diffuse it quickly, and instead causes sweat to collect locally, which intensifies the formation of sweat marks, making them even more noticeable during intense or long-term exercise.

[0005] Patent Document 1 discloses a sweat stain-resistant fabric and sweat stain-resistant fabric clothing. The sweat stain-resistant fabric is made of polyester fiber, and a water repellent agent is applied to one surface of the fabric to prevent sweat stains. However, the sweat stain prevention effect of applying a water repellent agent to the surface of the fiber is limited. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-26001 Summary of the Invention [Problem to be solved by the invention]

[0007] In response to the deficiencies of the prior art, the object of the present invention is to provide a yarn, a fabric obtained using said yarn, and a garment having excellent ability to hide sweat marks. [Means for solving the problem]

[0008] As a result of intensive research to solve the above problem, we have found that by using the following yarn, it is possible to produce a fabric that has excellent ability to hide sweat marks. The present invention was completed based on this finding.

[0009] That is, in a first aspect, the present invention provides a yarn, the yarn comprises a fiber body; the fiber body includes a core layer and a sheath layer, The sheath layer is provided on the outer periphery of the core layer, the sheath layer contains a diffuse reflector, the content of the diffuse reflector is 3% or more of the mass of the sheath layer, and at least a portion of the diffuse reflector is exposed on the surface of the sheath layer to form multiple diffuse reflector portions.

[0010] When the yarn has the above-described configuration, light rays irradiated onto a product using the yarn are diffusely reflected by the multiple diffuse reflecting portions on the surface of the sheath layer, reducing specular reflection of the light rays, thereby reducing visible sweat marks and allowing the product to maintain a clean appearance even when sweating.

[0011] The core layer preferably comprises a diffuse reflector.

[0012] The core layer preferably contains a diffuse reflector, and the content of the diffuse reflector in the core layer is equal to or greater than the content of the diffuse reflector in the sheath layer.

[0013] The average particle size of the diffuse reflector is preferably 10 to 3000 nm.

[0014] The diffuse reflector is preferably a ceramic powder.

[0015] The yarn contains a diffuse reflective material such as ceramic powder in the sheath layer or core layer of the fiber body, which results in the formation of more micropores and passages within the fiber body. These micropores and passages resemble capillaries, promoting moisture diffusion along the fiber axis and diameter, thereby improving the moisture absorption and quick-drying properties of the yarn. Furthermore, the diffuse reflective material absorbs part of the ultraviolet and near-infrared rays and scatters the rest, which is advantageous for enhancing the ultraviolet and infrared protection capabilities of fabrics and products made using the fabric. Furthermore, the diffuse reflective material enhances the strength and rigidity of the fiber, improving its abrasion resistance and tear resistance, which is advantageous for improving the abrasion resistance and tensile resistance of fabrics and products made using the fabric.

[0016] It is preferable that the diffuse reflecting portion has a shape in which the diffuse reflecting material protrudes from the surface of the sheath layer, and / or a shape in which the diffuse reflecting material is recessed into the sheath layer, causing a depression in the surface of the sheath layer, and it is preferable that multiple diffuse reflecting portions are arranged at intervals on the surface of the sheath layer.

[0017] In the fiber body, the cross-sectional area of ​​the sheath layer is preferably 1 to 4 times the cross-sectional area of ​​the core layer.

[0018] The thickness of the thread is preferably 20D to 300D or 10s to 90s.

[0019] In a second aspect, the present invention provides a fabric comprising the above-mentioned yarn.

[0020] In a third aspect, the present invention provides a garment comprising the fabric described above. [Effects of the Invention]

[0021] The yarn of the present invention can reduce visible sweat marks, thereby providing fabrics that maintain a clean appearance even when sweating, and fabrics and garments made using the yarn have excellent strength, stiffness, UV protection, infrared protection, abrasion resistance, and tear resistance. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a schematic diagram showing the structure of the fiber body contained in the yarn provided by the present invention. [Figure 2] FIG. 2 is a schematic diagram of a local enlargement of the fiber body of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0023] In order to further explain the technical means adopted by the present invention and its effects, the present invention will be further described below in conjunction with examples and accompanying drawings. The specific embodiments described herein do not limit the present invention, but are only used to explain the present invention. When the following description is related to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements.

[0024] In the present invention embodiments, terms such as "exemplary" or "for example" are used to denote an example, illustration, or explanation. Any embodiment or design described in the present invention as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. In short, the purpose of using terms such as "exemplary" or "for example" is to present related concepts in a concrete manner.

[0025] The technical solutions of the present invention will be described in detail below through specific embodiments. Some of the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The following description of the embodiments of the present invention will be made in conjunction with the drawings.

[0026] [thread] The yarn according to the first aspect of the present invention is composed of a plurality of fibers, each of which includes a fiber body 1.

[0027] As shown in Figures 1 and 2, the fiber body 1 includes a core layer 10 and a sheath layer 20, where the core layer 10 is at the center of the fiber body 1 and the sheath layer 20 is provided on the outer periphery of the core layer 10, and the surface of the sheath layer 20 includes multiple diffuse reflection portions 11.

[0028] The sheath layer 20 protects the core layer 10 and reduces the effects of the external environment such as abrasion, erosion, etc. Therefore, the surface properties of the fiber body 1 such as hand, gloss, color, etc. depend on the sheath layer 20.

[0029] The sheath layer 20 contains a diffuse reflector 30 , and at least a portion of the diffuse reflector 30 contained in the sheath layer 20 is exposed on the surface of the sheath layer 20 to form a plurality of diffuse reflecting portions 11 .

[0030] The diffuse reflecting portion 11 is a portion formed by the diffuse reflecting material 30 exposed on the surface of the sheath layer 20, and has the property of diffusing light and reflecting it in multiple directions.

[0031] The shape of the diffuse reflector 11 may be, for example, a protrusion, a groove, a hole, or a combination of these. The shape of the diffuse reflector 11 in plan view may be, for example, a circle, a rectangle, a diamond, an ellipse, a trapezoid, or any other shape.

[0032] A plurality of diffuse reflecting portions 11 are preferably provided at intervals on the surface of the sheath layer 20. The diffuse reflecting portions 11 may be provided at random or regular positions.

[0033] The average diameter of the diffuse reflection portions 11 is, for example, in the range of 10 to 3000 nm. The average diameter is preferably in the range defined by any two of the following: 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 500 nm, 800 nm, 1300 nm, 1500 nm, 2000 nm, 2500 nm, and 3000 nm. The average diameter is, for example, the circumscribed circle equivalent diameter.

[0034] The diffuse reflector 30 forming the diffuse reflector 11 is a material that has the property of diffusing light and reflecting it in multiple directions, and examples thereof include ceramic powder.

[0035] The ceramic powder contains at least one selected from, for example, titanium oxide, zinc oxide, magnesium oxide, calcium carbonate, silicate, alumina, etc. For example, when the ceramic powder contains zinc oxide or titanium oxide, it is effective in absorbing ultraviolet rays and reducing the amount of ultraviolet rays that penetrates into the fiber or reaches the skin, thereby enhancing the ultraviolet protection function of the yarn and its products.

[0036] The average particle size of the diffuse reflective material 30 is, for example, 10 to 3,000 nm. The average particle size is preferably within a range consisting of any two of the following: 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 500 nm, 800 nm, 1,300 nm, 1,500 nm, 2,000 nm, 2,500 nm, and 3,000 nm. The average particle size is measured, for example, by a laser diffraction / scattering method. Nanometer-level diffuse reflective material 30 changes the light scattering properties of the yarn, scattering light on the yarn and the resulting product, and is therefore advantageous for hiding sweat marks.

[0037] When the sheath layer 20 includes the diffuse reflective material 30, the surface of the sheath layer 20 becomes uneven and rough. Therefore, when light is irradiated onto a yarn containing the diffuse reflective material 30 in the sheath layer 20 or onto a product using the yarn, the light is diffusely reflected by the diffuse reflective material 30 and reflected in multiple directions. When the yarn absorbs sweat, the specular reflection of light is reduced through the diffuse reflective material 30. As a result, fabrics and clothing made from the yarn can effectively reduce visible sweat marks and avoid the occurrence of noticeable sweat stains, maintaining a clean appearance even when sweating and reducing the psychological discomfort caused by sweat marks.

[0038] In addition, the diffuse reflective material 30 increases the strength and rigidity of the fiber, improving the abrasion resistance and tear resistance of the fiber, so that a yarn containing the diffuse reflective material 30 in the sheath layer 20 and products using such yarn have improved abrasion resistance and tensile resistance.

[0039] The core layer 10 may contain a diffuse reflector 30, and the diffuse reflector 30 may contain ceramic powder.

[0040] If a diffuse reflector 30 is contained in at least one of the sheath layer 20 and the core layer 10 of the yarn body, when ultraviolet rays and near-infrared rays are irradiated onto the yarn, the diffuse reflector 30 in the fiber body 1 absorbs part of the ultraviolet rays and near-infrared rays and scatters the remainder, which is advantageous in improving the ultraviolet protection ability and heat-shielding performance of the yarn and products using said yarn.

[0041] Furthermore, by incorporating a diffuse reflector 30 into at least one of the sheath layer 20 and the core layer 10 of the yarn body, many micropores and passages similar to capillaries can be formed within the yarn body, allowing moisture to be quickly diffused along the fiber axis and radial directions, improving the moisture absorption and quick-drying performance of the yarn.

[0042] Furthermore, when a diffuse reflective material 30 is contained in at least one of the sheath layer 20 and the core layer 10 of the yarn body, the diffuse reflective material 30 increases the strength and rigidity of the fiber, and can improve the abrasion resistance and tear resistance of the fiber, which is also advantageous in improving the abrasion resistance and tensile resistance of the yarn and products using the yarn.

[0043] The yarn has a core-sheath structure, with the sheath layer 20 surrounding the outside of the core layer 10. If at least one of the core layer 10 and the sheath layer 20 contains a diffuse reflective material 30, the surfaces of the core layer 10 and the sheath layer 20 become rougher. When light is irradiated onto the yarn, part of the light is diffusely reflected by the sheath layer 20, and the remaining part penetrates into the micropores of the fiber body 1 to reach the core layer 10. At this time, ultraviolet and near-infrared light that penetrates the micropores is continuously reflected within the micropores, part of which is absorbed by the diffuse reflective material 30, and the remaining part reaches the core layer 10 and is diffusely reflected again. This further improves the heat-shielding and UV-protection capabilities of the yarn and products using the yarn.

[0044] Furthermore, the light irradiated to the yarn is diffused and reflected by the sheath layer 20 and the core layer 10 of the fiber body 1 contained in the yarn, making it difficult for sweat stains to appear on products using the yarn, reducing the formation of noticeable sweat stains, improving the appearance of cleanliness, and reducing psychological discomfort.

[0045] There are no particular restrictions on the content of diffuse reflector 30 in the core layer 10 and the sheath layer 20, but from the viewpoint of enabling the yarn to have good heat-shielding and UV protection capabilities as well as a certain degree of flexibility and processability, it is preferable to control the content of diffuse reflector 30 in the core layer 10 to a range equal to or exceeding the content of diffuse reflector 30 in the sheath layer 20 (for example, more than 1 time and not more than 5 times the content of diffuse reflector 30 in the sheath layer 20).

[0046] Although the diffuse reflective material 30 can increase the strength and rigidity of the fiber, adding too much diffuse reflective material 30 can reduce the flexibility and elasticity of the fiber body 1, making the yarn stiff and rough and resulting in a poor wearing experience. Therefore, by making the content of diffuse reflective material 30 in the core layer 10 equal to or greater than that of the sheath layer 20, or by reducing the content of diffuse reflective material 30 in the sheath layer 20, the fiber body 1 can maintain its flexibility and smooth the yarn surface, while also having good toughness and rigidity, and providing a certain level of heat-shielding and UV-protective capabilities. This also prevents deterioration in the fabric's hand feel and gloss, and is advantageous for subsequent processing (e.g., dyeing).

[0047] The content of the diffuse reflective material 30 in the core layer 10 is, for example, 30% to 85% of the mass of the core layer 10. This provides the core layer 10 with relatively good moisture absorption, quick-drying, heat-shielding, and UV-protection capabilities, as well as a certain level of flexibility and elasticity. If the content of the diffuse reflective material 30 in the core layer 10 exceeds the above range, the fibers tend to become hard and brittle, and their elasticity and flexibility tend to decrease, resulting in reduced durability and comfort. In addition, processing tends to become more difficult, and the processing costs tend to increase. On the other hand, if the content of the diffuse reflective material 30 in the core layer 10 is below the above range, the heat-shielding and UV-protection capabilities of the yarn tend to decrease.

[0048] The content of the diffuse reflector 30 (e.g., ceramic powder) in the core layer 10 is preferably within a range consisting of any two of the following: 30%, 35%, 40%, 45%, 50%, 55%, 65%, 70%, 75%, 80%, and 85% of the mass of the core layer 10.

[0049] The content of the diffuse reflective material 30 (e.g., ceramic powder) in the sheath layer 20 is, for example, 3% to 20% of the mass of the sheath layer 20. This allows the yarn to maintain good hand feel, flexibility, and processability, and to have heat-shielding and UV-protective capabilities. If the content of the diffuse reflective material 30 in the sheath layer 20 exceeds this range, the surface of the yarn tends to become rough, and flexibility and processability tend to decrease. On the other hand, if the content of the ceramic powder in the sheath layer 20 is below this range, the moisture absorption and quick-drying properties, heat-shielding properties, UV-protective properties, and sweat-hiding properties of the yarn tend to decrease, and the mechanical protection and processability of the sheath layer 20 also tend to decrease, resulting in a decrease in the service life of the yarn and stability during processing.

[0050] The content of the diffuse reflector 30 (e.g., ceramic powder) in the sheath layer 20 is preferably within a range consisting of any two of the following: 3%, 6%, 9%, 12%, 15%, 18%, and 20% of the mass of the sheath layer 20.

[0051] The sheath layer 20 surrounds the outside of the core layer 10 to protect the core layer 10, provide additional functions, or improve the hand of the fiber. The core layer 10 provides the basic functionality of the yarn, such as quick-drying, sweat-absorbing, UV protection, and infrared protection. To improve the basic functionality while smoothing the yarn surface of the fiber body 1 and maintaining a good hand, it is preferable that the cross-sectional area of ​​the core layer 10 is equal to or less than the cross-sectional area of ​​the sheath layer 20 and that the core layer 10 contains a larger amount of diffuse reflective material 30.

[0052] The cross-sectional area of ​​the sheath layer 20 is, for example, 1 to 4 times that of the core layer 10. This configuration can further enhance the quick-drying, sweat-absorbing, UV protection, and infrared protection capabilities of the yarn, while also ensuring the strength and flexibility of the yarn fiber and providing good hand feel and processability.

[0053] The cross-sectional area of ​​the sheath layer 20 is preferably within a range formed by any two of the following: 1, 1.5, 2, 2.5, 3, 3.5, and 4 times the cross-sectional area of ​​the core layer 10 .

[0054] The diffuse reflective material 30 can be incorporated into the fibers, for example, by mixing the diffuse reflective material 30 with a polymer solution or melt before spinning the fibers, and then spinning the fibers to produce the fibers. This manufacturing method allows the diffuse reflective material 30 to be uniformly distributed within the fibers.

[0055] The core layer 10 and sheath layer 20 that make up the fiber body 1 may be made of the same fiber material or different fiber materials. In functional clothing such as sportswear, using cotton fiber, bamboo fiber, or synthetic fiber for the core layer 10 is advantageous for absorbing and diffusing sweat through the yarn.

[0056] When the core layer 10 and sheath layer 20 constituting the fiber body 1 are both formed of synthetic fibers, the fiber body 1 may have a structure in which polyester covers polyester, for example, the core layer 10 may be polyester and the sheath layer 20 may be polyester, or the fiber body 1 may have a structure in which polyester covers polyamide (e.g., nylon fiber), the core layer 10 may be polyamide and the sheath layer 20 may be polyester.

[0057] The cross section of the fiber body 1 may be irregular, for example, flat, triangular, or other irregular shapes. Yarn fibers with irregular cross sections tend to have a higher light scattering ability in the sheath layer 20 compared to yarn fibers with circular cross sections. The fiber body 1 may also have many micropores and passages. The micropores and passages are advantageous for moisture diffusion.

[0058] The thickness of a thread is, for example, 20D to 300D. In the textile industry, "D" stands for denier, a unit that represents the density of a fiber. The higher the denier number, the thicker the fiber. The count of a thread is, for example, 10s to 50s. In the textile industry, "s" stands for count, which is a unit that represents the thickness of a thread, and the higher the thread count, the thinner the thread.

[0059] Thinner yarns are suitable for creating thin, delicate, and breathable fabrics, such as those used in high-end underwear, summer clothing, or delicate accessories. Thicker yarns are more durable and structurally stable, making them suitable for fabrics with a consistent thickness, such as those used in outdoor gear, backpacks, furniture, or winter clothing. Thinner yarns require more precise spinning machines and stricter tension control to prevent breakage during processing. On the other hand, thicker yarns can be processed using simpler processes, but require more effort to ensure the yarn's uniformity and strength.

[0060] The thickness of the thread is preferably within a range defined by any two of 20D, 50D, 100D, 150D, 200D, 250D, and 300D.

[0061] The yarn provided by the present invention can improve moisture absorption and quick drying performance, UV protection ability, infrared protection ability, sweat stain hiding ability, abrasion resistance, and tensile resistance.

[0062] [material] The fabric according to the second aspect of the present invention includes the above-mentioned yarn and has the advantageous effects of the above-mentioned yarn.

[0063] The fabric includes woven fabric, nonwoven fabric, and knitted fabric. The fabric is not particularly limited, and may be, for example, a knitted fabric or a cross-woven fabric obtained by weaving or knitting the above-mentioned yarn, or a knitted fabric or a cross-woven fabric obtained by weaving or knitting a mixture of the above-mentioned yarn and other yarns.

[0064] [clothing] According to a third aspect of the present invention, a garment includes the fabric, and examples of the garment include functional clothing such as sportswear (specifically, tracksuits, shorts, T-shirts, polo shirts, swimwear, wetsuits, ski suits, leotards, training shoes, soccer shoes, riding boots, ice skates, etc.), which can benefit from the advantageous effects of the yarn. [Example]

[0065] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to these examples.

[0066] Example 1 The following yarns are woven to create a fabric (fabric area: 10cm 2 ) was obtained. Yarn: The thickness is 100D, and the yarn fibers are formed from polyester fibers including a core layer and a sheath layer, the cross-sectional area of ​​the sheath layer 20 is 1 times the cross-sectional area of ​​the core layer 10, and the sheath layer 20 contains ceramic powder, and part of the ceramic powder is exposed on the surface of the sheath layer 20 to form the diffuse reflection portion 11. The ceramic powder content of the sheath layer 20 is 5% of the mass of the sheath layer 20, and the ceramic powder content of the core layer 10 is 0%.

[0067] Example 2 A fabric was obtained in the same manner as in Example 1, except that the yarn was changed to the following composition. Yarn: The thickness is 100D, and the yarn fibers are formed from polyester fibers including a core layer and a sheath layer, the cross-sectional area of ​​the sheath layer 20 is 1 times the cross-sectional area of ​​the core layer 10, and the sheath layer 20 contains ceramic powder, and part of the ceramic powder is exposed on the surface of the sheath layer 20 to form the diffuse reflection portion 11. The ceramic powder content of the sheath layer 20 is 20% of the mass of the sheath layer 20, and the ceramic powder content of the core layer 10 is 0%.

[0068] Example 3 A fabric was obtained in the same manner as in Example 1, except that the yarn was changed to the following composition. Yarn: The thickness is 100D, the sheath layer of the yarn fiber is formed from polyester fiber including a core layer and a sheath layer, the core layer is nylon, the cross-sectional area of ​​the sheath layer 20 is 1 times the cross-sectional area of ​​the core layer 10, the sheath layer 20 contains ceramic powder, and part of the ceramic powder is exposed on the surface of the sheath layer 20 to form the diffuse reflection portion 11. The ceramic powder content of the sheath layer 20 is 20%, and the ceramic powder content of the core layer 10 is 80%.

[0069] Comparative Example 1 A fabric was obtained in the same manner as in Example 1, except that the yarn was changed to the following composition. Yarn: The thickness is 100D, and the yarn fibers are formed from polyester fibers including a core layer and a sheath layer. The cross-sectional area of ​​the sheath layer 20 is 1 times the cross-sectional area of ​​the core layer 10. The difference from Example 1 is that the sheath layer 20 and the core layer 10 do not contain ceramic powder, and the surface of the sheath layer 20 does not have a diffuse reflection portion 11.

[0070] The fabrics obtained in the above Examples and Comparative Examples were evaluated for sweat stain hiding ability, quick-drying ability, UV protection ability, and near-infrared protection ability by the following tests. The results are shown in Table 1.

[0071] Test of sweat stain hiding ability: The fabric was spread flat on an openwork circular bracket, and the time (seconds) for water to disappear after dripping onto the fabric was measured.

[0072] Quick-drying test: The time (minutes) until the fabric was 100% dry was measured according to the method specified in "ISO17617-2014 Drying speed of textiles."

[0073] UV protection ability test: Using a spectrophotometer, the UV transmittance at wavelengths of 280 to 400 nm was measured, and the UV blocking rate (%) was calculated.

[0074] Near-infrared protection ability test: Near-infrared transmittance (%) in the wavelength range of 780 to 2500 nm was measured using a spectrophotometer.

[0075] Heat-shielding test: Based on the "JISL1951 Heat-shielding Test Method for Fabrics," a thermal imager and a thermocouple temperature sensor were used to measure the temperature change of the heat energy after the heat source (or light source) passed through the fabric, and the heat-shielding rate (%) was calculated.

[0076] [Table 1]

[0077] As can be seen from Table 1, the fabric of the present invention has good sweat stain hiding ability, quick drying, UV protection ability, and near-infrared protection ability.

[0078] Here, the numerical values ​​and numerical ranges in the examples are approximate values, and there is a possibility that there may be a certain range of error due to the influence of the manufacturing process.

[0079] The present invention is intended to cover any modifications, uses, or adaptability changes of the present invention, and these modifications, uses, or adaptability changes are in accordance with general principles and include common knowledge or conventional technical solutions in the art that are not disclosed in the present invention. Each component and combination of components of the present invention is an example, and additions, omissions, substitutions, and modifications of components may be made as appropriate within the scope of the spirit of the present invention. Furthermore, the present invention is not limited by the embodiments, but is limited only by the scope of the utility model registration claims. [Explanation of symbols]

[0080] 1. Fiber body 10 core layer 11 Diffuse reflection section 20 Sheath layer 30 Diffuse Reflector

Claims

1. A thread, including a fiber body, the fiber body includes a core layer and a sheath layer, the sheath layer is provided on the outer periphery of the core layer, The sheath layer contains a diffuse reflective material, the content of the diffuse reflective material is 3% or more of the mass of the sheath layer, and at least a portion of the diffuse reflective material is exposed on the surface of the sheath layer to form multiple diffuse reflective portions.

2. The yarn of claim 1 , wherein the core layer comprises a diffuse reflective material.

3. The yarn of claim 1 , wherein the core layer comprises a diffuse reflective material, and the content of the diffuse reflective material in the core layer is equal to or greater than the content of the diffuse reflective material in the sheath layer.

4. The yarn according to claim 1, wherein the average particle size of the diffuse reflective material is 10 to 3000 nm.

5. The yarn according to any one of claims 1 to 4, wherein the diffuse reflective material is a ceramic powder.

6. The yarn according to any one of claims 1 to 4, wherein the diffuse reflective portion has a shape in which the diffuse reflective material protrudes from the surface of the sheath layer and / or a shape in which the diffuse reflective material is recessed into the sheath layer, causing a depression in the surface of the sheath layer, and a plurality of the diffuse reflective portions are arranged at intervals on the surface of the sheath layer.

7. The yarn according to any one of claims 1 to 4, wherein the cross-sectional area of ​​the sheath layer is 1 to 4 times the cross-sectional area of ​​the core layer in the cross section of the fiber body.

8. The yarn according to any one of claims 1 to 4, wherein the yarn has a thickness of 20D to 300D, or 10s to 90s.

9. A fabric comprising the yarn according to any one of claims 1 to 4.

10. A garment comprising the fabric of claim 9.

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