Fabric product

Abstract

Provided is a fabric product containing synthetic fibers, wherein the weight per unit area is 50g / m2-330g / m2, and the synthetic fibers contain first fibers including composite tungsten oxide particles, and second fibers including titanium oxide particles at a ratio of 1 mass % or more.

Description

Textile products

[0001] This invention relates to textile products.

[0002] Traditionally, the textile industry has been studying various functional fibers and fabrics that utilize sunlight.

[0003] For example, Patent Document 1 discloses a solar heat selective absorbing fiber obtained by melt-spinning a compound composition of a carbide powder of a transition metal belonging to Group IV of the periodic table or a mixed powder of the same with aluminum and a thermoplastic synthetic linear polymer, or by melt-compound spinning the compound composition and the thermoplastic synthetic linear polymer.

[0004] According to Patent Document 1, a fiber is provided in which a substance that efficiently selectively absorbs solar heat and emits little thermal radiation is uniformly interposed within the tissue. As a result, when made into clothing, phenomena such as interfacial delamination seen in conventional technologies due to film formation do not occur at all, and stable selective solar heat absorption performance can always be maintained.

[0005] Patent Document 2 discloses a shirt fabric composed of polyester multifilament yarn having a multi-lobed cross-sectional shape and polyester spun yarn containing 2 to 15% by weight of inorganic fine particles, characterized in that it has a water absorption rate of 5 seconds or less, a frictional charge voltage of 1000V or less, a stain resistance of level 4 or higher, and an ultraviolet shielding rate of 85% or higher.

[0006] According to Patent Document 2, it is possible to provide a shirt fabric that instantly absorbs and diffuses water, is comfortable to wear without stickiness or stuffiness caused by sweat during wear, and does not cause discomfort due to static electricity, and is also stain-resistant, making it difficult for dirt to adhere to it for a long time, and is gentle on the skin by shielding it from harmful ultraviolet rays.

[0007] Patent Document 3 discloses a garment fabric containing polyester fibers, wherein the fabric contains endothermic and radiant polyester fibers A containing cesium tungsten oxide particles and titanium oxide particles, and polyester fibers B that do not contain cesium tungsten oxide particles, and the fabric is treated to be water-absorbing and quick-drying.

[0008] According to Patent Document 3, cesium tungsten oxide particles within the fibers absorb heat (infrared rays) emitted from the body, enhancing thermal comfort. Furthermore, the inclusion of titanium dioxide absorbs visible light and ultraviolet rays. The energy from infrared rays, visible light, and ultraviolet rays is used to cause a phase change in water on the fiber surface, promoting the drying of the fabric.

[0009] Japanese Patent Publication No. 1-132816, Japanese Patent Publication No. 2000-314044, Japanese Patent Publication No. 2023-174494

[0010] Incidentally, while it has long been widely known that ultraviolet rays are harmful to the human body, in recent years there has also been growing discussion about the adverse effects of near-infrared rays on the skin.

[0011] Therefore, there is a growing demand for fabric products that can block ultraviolet and near-infrared rays from sunlight.

[0012] One aspect of the present invention aims to provide a fabric product that can block ultraviolet and near-infrared rays.

[0013] A fabric product according to one aspect of the present invention is a fabric product containing chemical fibers, with a basis weight of 50 g / m². ２ More than 330g / m ２ The chemical fiber comprises a first fiber containing composite tungsten oxide particles and a second fiber containing titanium oxide particles in a proportion of 1% by mass or more.

[0014] According to one aspect of the present invention, a fabric product capable of shielding ultraviolet and near-infrared rays can be provided.

[0015] Figure 1 is an explanatory diagram of fibers used in a fabric product according to one aspect of the present disclosure.

[0016] A specific example of a fabric product according to one embodiment of this disclosure (hereinafter referred to as "this embodiment") is described below, but the present invention is not limited to the following embodiments, and various modifications and substitutions can be made to the following embodiments without departing from the scope of the present invention.

[0017] In this specification, the names of the components may be described with the addition of "first," "second," "third," etc. For example, they may be described as "first fiber," "second fiber," "third fiber," etc. The "first," "second," and "third" added to the fibers are merely to identify each component and prevent confusion during description, and do not indicate arrangement or priority. When there is no risk of confusion or when referring collectively, they may be written as "fiber." [Fabric Products] The inventors of the present invention have studied fabric products that can shield against ultraviolet and near-infrared rays. They have found that by providing a fabric product containing a first fiber containing composite tungsten oxide particles that can mainly absorb near-infrared rays and a second fiber containing titanium oxide particles that can mainly shield against ultraviolet rays, it is possible to shield against ultraviolet and near-infrared rays, and have completed the present invention.

[0018] Therefore, the fabric product of this embodiment is a fabric product containing chemical fibers, and the chemical fibers may include the first fiber and the second fiber described below. (1) Regarding the fibers contained in the fabric product, the fabric product of this embodiment may contain multiple types of fibers with different additive particles.

[0019] An example of the composition of a fiber containing additive particles that can be used in the fabric product of this embodiment will be explained with reference to Figure 1. Figure 1 is a schematic cross-sectional view of the fiber 10 containing additive particles, passing through the central axis CA.

[0020] As shown in Figure 1, the fiber 10 containing the added particles can have a chemical fiber resin 11 and the added particles 12.

[0021] The chemical fiber can be selected according to the intended use of the fabric product. For example, when used in clothing, it may be a chemical fiber commonly used in clothing. The chemical fiber may be one or more fibers selected from the group of resins consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyamide, acrylic, and modacrylic. In other words, the resin 11 of the fiber used in the fabric product of this embodiment may be one or more fibers selected from the above group of resins.

[0022] As described below, the fabric product of this embodiment may include first fibers and second fibers with different added particles. The resins of the first fibers and the second fibers may be different or the same.

[0023] The added particles 12 vary depending on the fiber and can be either composite tungsten oxide particles, titanium oxide particles, or zinc oxide particles.

[0024] Figure 1 is a schematic diagram in which the added particles 12 are shown as circles or ellipses, but the shape is not limited to these and can have any shape.

[0025] In Figure 1, the additive particles 12 are shown as being entirely embedded within the resin 11, but for example, some of the additive particles 12 may be exposed from the surface 11A of the resin 11. However, from the viewpoint of preventing the additive particles 12 from falling off when repeated washing is performed, it is preferable that the additive particles 12 are entirely contained within the resin 11. In other words, it is preferable that the additive particles 12 are kneaded into the resin 11.

[0026] In Figure 1, fiber 10 is shown as a single, untwisted yarn (untwisted yarn). However, the fibers used in the fabric product of this embodiment may be untwisted yarn, twisted yarn made by twisting multiple yarns together, or spun yarn. In the case of twisted yarn, it is preferable that each yarn contained in the twisted yarn contains the same compound additive particles.

[0027] The following describes each fiber. (1-1) First fiber The first fiber may contain composite tungsten oxide particles. (1-1-1) Composite tungsten oxide particles (Composition) Composite tungsten oxide particles may be, for example, of the general formula M ｘ WO ｙIt may contain a composite tungsten oxide represented by . Note that the composite tungsten oxide particles may consist solely of composite tungsten oxide, but this does not exclude the inclusion of unavoidable impurities. In the general formula, the element M(M) is H (hydrogen), He (helium), alkali metal elements, alkaline earth metal elements, rare earth elements, Mg (magnesium), Zr (zirconium), Cr (chromium), Mn (manganese), Fe (iron), Ru (ruthenium), Co (cobalt), Rh (rhodium), Ir (iridium), Ni (nickel), Pd (palladium), Pt (platinum), Cu (copper), Ag (silver), Au (gold), Zn (zinc), Cd (cadmium), Al (aluminum), Ga (gallium), In (indium), It can be one or more elements selected from Tl (thallium), Si (silicon), Ge (germanium), Sn (tin), Pb (lead), Sb (antimony), B (boron), F (fluorine), P (phosphorus), S (sulfur), Se (selenium), Br (bromine), Te (tellurium), Ti (titanium), Nb (niobium), V (vanadium), Mo (molybdenum), Ta (tantalum), Re (rhenium), Be (beryllium), Hf (hafnium), Os (osmium), Bi (bismuth), and I (iodine). Also, W represents tungsten, O represents oxygen, and x may be 0.001 ≤ x ≤ 1.2. y may satisfy 2.0 ≤ y ≤ 3.0.

[0028] In this specification, alkali metal elements include Li (lithium), Na (sodium), K (potassium), Rb (rubidium), Cs (cesium), and Fr (francium).

[0029] Furthermore, examples of alkaline earth metal elements include Ca (calcium), Sr (strontium), Ba (barium), and Ra (radium).

[0030] Rare earth elements include Sc (scandium), Y (yttrium), La (lanthanum), Ce (cerium), Pr (praseodymium), Nd (neodymium), Pm (promethium), Sm (samarium), Eu (europium), Gd (gadolinium), Tb (terbium), Dy (dysprosium), Ho (holmium), Er (erbium), Tm (thulium), Yb (ytterbium), and Lu (lutetium).

[0031] Tungsten oxide itself, which does not contain element M, can also be used as a near-infrared absorbing material because the absence of oxygen from tungsten trioxide generates a sufficient amount of free electrons to enhance its absorption properties in the near-infrared region.

[0032] When element M is added to tungsten oxide to form a composite tungsten oxide, free electrons are generated in the composite tungsten oxide, resulting in stronger absorption characteristics in the near-infrared region due to these free electrons. Therefore, it is effective and preferable as a near-infrared absorbing material that absorbs near-infrared light around a wavelength of 1000 nm.

[0033] As previously described, elements that can be suitably used as element M are as follows. Particularly from the viewpoint of stability in composite tungsten oxide particles to which element M is added, it is more preferable that element M is one or more elements selected from H, alkali metal elements, alkaline earth metal elements, rare earth elements, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Hf, Os, Bi, and I.

[0034] From the viewpoint of improving the optical properties and weather resistance of the composite tungsten oxide particles, the aforementioned element M is more preferably at least one selected from the group consisting of H, alkali metals, alkaline earth metal elements, transition metal elements (rare earth elements, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Ti, Nb, V, Mo, Ta, Re, Hf, Os). Particularly preferred as element M is at least one selected from the group consisting of H, alkali metals, alkaline earth metal elements, and rare earth elements.

[0035] For composite tungsten oxide particles, by combining the control of the oxygen content of the tungsten oxide and the addition of the element M that generates free electrons, more efficient near-infrared absorbing particles can be obtained. When the control of the oxygen content and the addition of the element M that generates free electrons are used in combination, the general formula M representing the composite tungsten oxide ｘ WO ｙ , it is preferable that the relationships 0.001≦x≦1.2 and 2.0≦y≦3.0 are satisfied.

[0036] When the value of x is 0.001 or more, a sufficient amount of free electrons are generated, and the desired near-infrared absorption effect can be obtained. The larger the added amount of the element M, the more the supply amount of free electrons increases, and the near-infrared absorption efficiency also increases. However, when the value of x is about 1.2, this effect becomes saturated. Further, when the value of x is 1.2 or less, generation of an impurity phase in the composite tungsten oxide particles can be avoided, which is preferable.

[0037] Next, the value of y indicating the control of the oxygen content will be described. Regarding the value of y, in the composite tungsten oxide, in addition to the same mechanism as that of tungsten oxide working, there is supply of free electrons from the addition amount of the above-mentioned element M even when y=3.0. Therefore, 2.0≦y≦3.0 may be satisfied. (Crystal Structure) The crystal structure of the composite tungsten oxide contained in the composite tungsten oxide particles is not particularly limited, and the composite tungsten oxide particles may contain a composite tungsten oxide having any crystal structure. However, when the composite tungsten oxide contained in the composite tungsten oxide particles has a hexagonal crystal structure, the light transmittance in the visible light region and the light absorption in the near-infrared region of the particles are particularly improved. Therefore, the composite tungsten oxide may have a hexagonal crystal structure. (Average Particle Size) The average particle size of the composite tungsten oxide particles can be selected according to the properties required for fabric products. The composite tungsten oxide particles may have an average particle size of, for example, 800 nm or less. This is because particles having an average particle size of 800 nm or less do not completely block light by scattering, can maintain high visibility in the visible light region, and at the same time can efficiently maintain transparency. Particularly when transparency in the visible light region is emphasized, it is preferable to further consider light scattering in the visible light region caused by the particles.

[0038] When it is required to reduce light scattering in the visible light region caused by the composite tungsten oxide particles, the average particle size is more preferably 200 nm or less, and even more preferably 100 nm or less.

[0039] This is because if the average particle size is small, light scattering can be reduced, and unintended gloss in the visible light region and unintended color tone caused by light scattering (Rayleigh scattering) whose intensity is wavelength-dependent can be prevented.

[0040] If coarse particles are present in the step of kneading the composite tungsten oxide particles into fibers for producing the first fibers, the yarn may be broken during spinning. From this viewpoint as well, it is preferable to reduce the average particle size of the composite tungsten oxide particles.

[0041] Therefore, the average particle size of the composite tungsten oxide particles is preferably 800 nm or less, more preferably 200 nm or less, and even more preferably 100 nm or less. The lower limit of the average particle size of the composite tungsten oxide particles is not particularly limited, but is preferably 1 nm or more, more preferably 5 nm or more, and even more preferably 10 nm or more.

[0042] For the reasons stated above, the average particle size of the composite tungsten oxide particles is preferably 1 nm to 800 nm, more preferably 5 nm to 200 nm, even more preferably 10 nm to 200 nm, and particularly preferably 10 nm to 100 nm.

[0043] The average particle size of composite tungsten oxide particles is calculated by measuring the particle size of each composite tungsten oxide particle from transmission electron microscope images. Specifically, three fields of view are selected at a magnification that contains 200 or more composite tungsten oxide particles in each field of view. The images of the composite tungsten oxide particles within each field of view are binarized, and the average particle size is calculated using image analysis.

[0044] There is no particular upper limit to the number of composite tungsten oxide particles in one field of view, but for example, the magnification may be selected so that there are 500 or fewer composite tungsten oxide particles in one field of view. Alternatively, all composite tungsten oxide particles in three fields of view may be evaluated, but for example, a total of 500 to 800 particles in the three fields of view may be selected, or a total of 600 to 700 particles may be selected.

[0045] Then, the circular equivalent diameter is calculated from the area of ​​each composite tungsten oxide particle and this is taken as the particle size of the composite tungsten oxide particle. Next, the average particle size can be calculated by adding up the particle sizes of all the evaluated composite tungsten oxide particles and dividing by the number of particles evaluated. In other words, the arithmetic mean of the particle sizes of the evaluated composite tungsten oxide particles can be taken as the average particle size. (1-1-2) Regarding the content of composite tungsten oxide particles The content of composite tungsten oxide particles in the first fiber is not particularly limited, but may be, for example, 0.02% by mass or more, 0.03% by mass or more, or 0.05% by mass or more.

[0046] By increasing the content of composite tungsten oxide particles in the first fiber to 0.02% by mass or more, the near-infrared absorption capacity of the first fiber can be enhanced, thereby improving the near-infrared shielding performance of the fabric product of this embodiment.

[0047] The content of composite tungsten oxide particles in the first fiber may be 0.30% by mass or less, 0.20% by mass or less, 0.15% by mass or less, or less than 0.10% by mass.

[0048] By reducing the content of composite tungsten oxide particles in the first fiber to 0.30% by mass or less, the temperature rise of the fabric product of this embodiment, caused by heat generated mainly by the absorption of near-infrared rays by the composite tungsten oxide particles, can be reduced. Therefore, even when the fabric product of this embodiment is used in clothing, the comfort of the wearer can be enhanced.

[0049] Therefore, the first fiber may contain composite tungsten oxide particles in a proportion of 0.02% by mass or more and 0.30% by mass or less, 0.03% by mass or more and 0.20% by mass or less, 0.05% by mass or more and 0.15% by mass or less, or 0.05% by mass or more and less than 0.10% by mass. (1-2) Second fiber The second fiber may contain titanium oxide particles.

[0050] Titanium dioxide can reflect and absorb both UV-A (ultraviolet A rays) with wavelengths between 315 nm and 400 nm, and UV-B (ultraviolet B rays) with wavelengths between 280 nm and 315 nm, thereby blocking ultraviolet rays. Therefore, by combining the first fiber and the second fiber to form a fabric product, it is possible to create a fabric product that can block both ultraviolet and near-infrared rays.

[0051] Furthermore, it is believed that the titanium oxide particles contained in the second fiber reflect a portion of the light in the near-infrared region. Therefore, although the composite tungsten oxide particles contained in the first fiber generate heat when they absorb near-infrared light, it is thought that by combining them with the second fiber, the amount of near-infrared light absorbed can be reduced, thereby reducing the amount of heat generated.

[0052] It is also conceivable to arrange composite tungsten oxide particles and titanium oxide particles within the same fiber, but there is a risk that the composite tungsten oxide particles, placed in close proximity, will absorb the near-infrared rays reflected by the titanium oxide particles, potentially increasing the amount of heat generated.

[0053] Therefore, by using a second fiber in addition to the first fiber, and combining the two to create a fabric product, the temperature rise when exposed to sunlight can be reduced, and the comfort of the wearer can be enhanced even when the fabric product of this embodiment is used in clothing. (1-2-1) About titanium dioxide particles (Composition) Titanium dioxide particles are, for example, of the general formula TiO ２It can contain titanium dioxide represented by [formula]. Note that in titanium dioxide, oxygen may be deficient or in excess of the stoichiometric ratio. Titanium dioxide particles may consist only of titanium dioxide, but even in this case, the presence of unavoidable impurities is not excluded. (Crystal structure) The crystal structure of titanium dioxide contained in titanium dioxide particles is not particularly limited and may have any of the following crystal structures: anatase type, rutile type, or brookite type. Titanium dioxide may also be amorphous. (Average particle size) The average particle size of titanium dioxide particles can be selected according to the properties required for the fabric product. Titanium dioxide particles may have an average particle size of, for example, 800 nm or less. By setting the average particle size to 800 nm or less, high visibility in the visible light region can be maintained while simultaneously efficiently maintaining transparency.

[0054] From the viewpoint of reducing the scattering of light in the visible light region by titanium dioxide particles and preventing the occurrence of unintended gloss and unintended color tones in the visible light region, the average particle size is more preferably 200 nm or less, and even more preferably 100 nm or less.

[0055] If coarse particles are present in the process of kneading titanium dioxide particles into the fibers to produce the second fiber, there is a risk that the yarn may break during spinning. From this perspective, it is preferable to reduce the average particle size of the titanium dioxide particles.

[0056] Therefore, the average particle size of the titanium dioxide particles is preferably 800 nm or less, more preferably 200 nm or less, and even more preferably 100 nm or less. The lower limit of the average particle size of the titanium dioxide particles is not particularly limited, but is preferably 1 nm or more, more preferably 5 nm or more, and even more preferably 10 nm or more.

[0057] For the reasons stated above, the average particle size of the titanium dioxide particles is preferably 1 nm to 800 nm, more preferably 5 nm to 200 nm, even more preferably 10 nm to 200 nm, and particularly preferably 10 nm to 100 nm.

[0058] The average particle size of titanium oxide particles can be measured using the same procedure and conditions as for composite tungsten oxide particles, except that titanium oxide particles are used as the measurement target, so the explanation is omitted. (1-2-2) Regarding the content of titanium oxide particles, the content of titanium oxide particles in the second fiber is not particularly limited, but the second fiber may contain titanium oxide in a proportion of, for example, 1% by mass or more, or 1.5% by mass or more.

[0059] By increasing the titanium dioxide particle content in the second fiber to 1% by mass or more, the ultraviolet shielding ability of the second fiber can be enhanced, thereby improving the ultraviolet shielding performance of the fabric product of this embodiment.

[0060] The titanium dioxide particle content in the second fiber may be 10% by mass or less, or 5% by mass or less.

[0061] By reducing the titanium dioxide particle content in the second fiber to 10% by mass or less, the second fiber can be easily colored with dyes, thereby expanding the applications of the fabric product of this embodiment.

[0062] Therefore, the second fiber may contain titanium oxide particles in a proportion of 1% by mass or more and 10% by mass or less, or in a proportion of 1.5% by mass or more and 5% by mass or less. (1-3) Third fiber The fabric product of this embodiment may further contain a third fiber. The third fiber may contain zinc oxide particles.

[0063] Titanium dioxide is particularly excellent at shielding UV-B rays among ultraviolet rays. In contrast, zinc oxide is excellent at shielding UV-A rays. For this reason, the fabric product of this embodiment can be made to particularly enhance the light shielding performance in the ultraviolet region by including a third fiber containing zinc oxide particles in addition to the first and second fibers. (1-3-1) About zinc oxide particles (Composition) Zinc oxide particles may contain zinc oxide represented by the general formula ZnO, for example. In zinc oxide, oxygen may be deficient or in excess of the stoichiometric ratio. Zinc oxide particles may consist only of zinc oxide, but even in this case, the inclusion of unavoidable impurities is not excluded. (Crystal structure) The crystal structure of zinc oxide contained in zinc oxide particles is not particularly limited and may have a wurtzite-type crystal structure. Also, zinc oxide may be amorphous. (Average particle size) The average particle size of zinc oxide particles can be selected according to the properties required for the fabric product. Zinc oxide particles may have an average particle size of 800 nm or less, for example. By keeping the average particle size below 800 nm, high visibility in the visible light range can be maintained while simultaneously efficiently preserving transparency.

[0064] From the viewpoint of reducing the scattering of light in the visible light region by zinc oxide particles and preventing the occurrence of unintended gloss and unintended color tones in the visible light region, the average particle size is more preferably 200 nm or less, and even more preferably 100 nm or less.

[0065] If coarse particles are present in the process of kneading zinc oxide particles into fibers to produce the third fiber, there is a risk that the yarn may break during spinning. From this perspective, it is preferable to reduce the average particle size of zinc oxide particles.

[0066] Therefore, the average particle size of zinc oxide particles is preferably 800 nm or less, more preferably 200 nm or less, and even more preferably 100 nm or less. The lower limit of the average particle size of zinc oxide particles is not particularly limited, but is preferably 1 nm or more, more preferably 5 nm or more, and even more preferably 10 nm or more.

[0067] For the reasons stated above, the average particle size of the zinc oxide particles is preferably 1 nm to 800 nm, more preferably 5 nm to 200 nm, even more preferably 10 nm to 200 nm, and particularly preferably 10 nm to 100 nm.

[0068] The average particle size of zinc oxide particles can be measured using the same procedure and conditions as for composite tungsten oxide particles, except that zinc oxide particles are used as the measurement target, so the explanation is omitted. (1-3-2) Regarding the zinc particle content, the zinc particle content in the third fiber is not particularly limited, but may be, for example, 0.1% by mass or more, or 1% by mass or more.

[0069] By increasing the zinc oxide particle content in the third fiber to 0.1% by mass or more, the ultraviolet shielding ability of the third fiber can be enhanced, thereby improving the ultraviolet shielding performance of the fabric product of this embodiment.

[0070] The zinc oxide particle content in the third fiber may be 5% by mass or less, or 3% by mass or less.

[0071] By reducing the zinc oxide particle content in the third fiber to 5% by mass or less, the third fiber can be easily colored with dyes, thereby expanding the applications of the fabric product of this embodiment.

[0072] Therefore, the third fiber may contain zinc oxide particles in a proportion of 0.1% by mass or more and 5% by mass or more and 1% by mass or more and 3% by mass. (2) Characteristics of the fabric product (2-1) Form of the fabric product The fabric product of this embodiment may contain the first fiber and the second fiber, and its specific form is not particularly limited, but may be a woven fabric or a knitted fabric, for example. It may also be a nonwoven fabric containing the first fiber and the second fiber.

[0073] Furthermore, a woven fabric refers to a material made by weaving together warp threads and weft threads. By using first fibers, second fibers, and possibly even third fibers in the warp and weft threads, it is possible to create a fabric product containing each of these fibers. When the fabric product of this embodiment is a woven fabric, its structure (weaving method) can be selected according to the desired weight and thickness.

[0074] Further, knitted fabric refers to a fabric manufactured by intertwining yarns into loops.

[0075] In the fabric product of the present embodiment, the content ratio of the additive-containing fibers is not particularly limited, and may be, for example, 20% by mass or more. Further, it may be 60% by mass or more, 70% by mass or more, 80% by mass or more, or 90% by mass or more. The fabric product of the present embodiment may be formed only of additive-containing fibers.

[0076] Note that the additive-containing fibers refer to the first fiber, the second fiber, and the third fiber. In addition to the additive-containing fibers, the fabric product of the present embodiment may contain fibers that contain an extremely low amount or no content of additives that are not classified into any of the first fiber, the second fiber, and the third fiber. (2-2) Basis Weight and Thickness Basis weight represents the weight per unit area of the fabric product.

[0077] The basis weight of the fabric product of the present embodiment is 50 g / m ２ or more and 330 g / m ２ or less.

[0078] By setting the basis weight to 50 g / m ２ or more, the shielding performance against ultraviolet rays and near-infrared rays can be improved.

[0079] By setting the basis weight to 330 g / m ２ or less, the temperature rise when the fabric product is irradiated with sunlight can be reduced, and even when the fabric product of the present embodiment is used for clothing, the comfort of a person wearing the clothing can be improved.

[0080] The thickness of the fabric product of the present embodiment may be 0.2 mm or more and 1.3 mm or less.

[0081] By setting the thickness to 0.2 mm or more, the shielding performance against ultraviolet rays and near-infrared rays can be improved.

[0082] By making the thickness 1.3 mm or less, the temperature rise when the fabric product is exposed to sunlight is reduced, and even when the fabric product of this embodiment is used in clothing, the comfort of the wearer can be improved. (2-3) Ultraviolet shielding rate, near-infrared shielding rate For the fabric product of this embodiment, the ultraviolet shielding rate when exposed to sunlight may be 80% or more, or 90% or more.

[0083] By achieving an ultraviolet (UV) shielding rate of 80% or more when exposed to sunlight, the transmission of UV rays is sufficiently reduced. For example, when the fabric product of this embodiment is used in clothing, the damage to the wearer's skin caused by UV rays can be sufficiently reduced.

[0084] In the fabric product of this embodiment, the near-infrared shielding rate when irradiated with sunlight may be 60% or more, or 70% or more.

[0085] By achieving a near-infrared shielding rate of 60% or more when exposed to sunlight, the transmission of near-infrared rays is sufficiently reduced. For example, when the fabric product of this embodiment is used in clothing, it reduces skin damage caused by near-infrared rays to the wearer, reduces body temperature rise, and enhances comfort.

[0086] It is preferable that the fabric product of this embodiment maintains a high ultraviolet shielding rate and near-infrared shielding rate even after repeated washing.

[0087] In this embodiment, after 50 washes, the ultraviolet shielding rate when exposed to sunlight may be 80% or more, the near-infrared shielding rate may be 60% or more, or the ultraviolet shielding rate may be 90% or more, and the near-infrared shielding rate may be 70% or more.

[0088] With respect to the first, second, and third fibers, by arranging additive particles in the resin of the fibers, it is possible to prevent a decrease in the ultraviolet and near-infrared shielding performance even after repeated washing, and for example, the above ultraviolet shielding rate and near-infrared shielding rate can be achieved. (2-4) Temperature rise when exposed to sunlight for 30 minutes With respect to the fabric product of this embodiment, the temperature rise when exposed to sunlight for 30 minutes may be 10°C or less, 8.5°C or less, or 8°C or less.

[0089] Regarding the fabric product, by limiting the temperature rise after 30 minutes of exposure to sunlight to 10°C or less, the comfort of the wearer can be enhanced even when the fabric product of this embodiment is used in clothing. (3) Applications of the fabric product The fabric product of this embodiment can be used in various applications where ultraviolet shielding performance and near-infrared shielding performance are required.

[0090] The fabric product of this embodiment can be used, for example, as clothing fabric, and may be used for fashion wear, sportswear, outdoor wear, arm covers, hats, etc.

[0091] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto. (1) Evaluation method (1-1) Ultraviolet shielding rate, near-infrared shielding rate The ultraviolet shielding rate was measured and calculated in accordance with JIS L 1925 (2019). Spectral transmittance was measured at 1 nm wavelength intervals, and all measured values ​​were used to calculate the ultraviolet shielding rate.

[0092] Regarding the evaluation of UV protection rate, a UV protection rate of 90% or higher was rated as ○, 80% to less than 90% as △, and less than 80% as ×. A UV protection rate of ○ indicates the best UV protection performance, followed by △ and then ×. A UV protection rate of ○ or △ means that the fabric product can adequately block ultraviolet rays.

[0093] The shielding rates for UV-A and UV-B were calculated using the same procedure as for ultraviolet shielding rates, except that the wavelength range used for calculation was 315 nm to 400 nm for UV-A and 280 nm to 315 nm for UV-B.

[0094] The near-infrared shielding rate was measured and calculated in accordance with JIS L 1925 (2019), except that the wavelength range was set to 800 nm to 2500 nm. Spectral transmittance was measured at 1 nm wavelength intervals, and all measured values ​​were used in the calculation of the near-infrared shielding rate.

[0095] Regarding the evaluation of near-infrared shielding rate, a near-infrared shielding rate of 70% or more was evaluated as ○, 60% or more but less than 70% as △, and less than 60% as ×. A near-infrared shielding rate evaluation of ○ indicates the best near-infrared shielding performance, followed by △ and then ×. A near-infrared shielding rate of ○ or △ means that the fabric product can sufficiently shield near-infrared rays. (1-2) Temperature rise when exposed to sunlight for 30 minutes In accordance with JIS L 1926 (2019), the difference in light absorption and heat generation temperature was measured and the temperature rise (hereinafter also referred to as "temperature rise") when exposed to sunlight for 30 minutes was recorded. The results are shown in the "temperature rise" column in Tables 2, 3, and 4.

[0096] Regarding the temperature rise evaluation, a temperature rise of 8°C or less was evaluated as ○, a temperature rise of more than 8°C but 10°C or less as △, and a temperature rise of more than 10°C as ×. A temperature rise evaluation of ○ means that the temperature rise when exposed to sunlight for 30 minutes has been reduced to the greatest extent possible, and the effect of reducing the temperature rise decreases in the order of △ and ×. A temperature rise evaluation of ○ or △ means that the fabric product can sufficiently reduce the temperature rise when exposed to sunlight for 30 minutes. (1-3) Basis weight and thickness The weight per unit area and thickness in the standard state of basis weight were measured according to Method A (JIS method) of JIS L 1096 (2020). (2) About experimental examples (2-1) Experimental example 1 Using polyester fiber A as the first fiber, polyester fiber C as the second fiber, and polyester fiber F from the fibers shown in Table 1, knitted fabric products were manufactured and evaluated so that each fiber was included in the mass ratio shown in Table 2 and the basis weight shown in Table 2. Furthermore, by selecting the ratio of the number of fibers that make up the knitted fabric, the proportion of each polyester fiber contained in the knitted fabric is selected.

[0097] The cesium tungsten oxide particles contained in polyester fiber A and polyester fiber B in Table 1 have the general formula Cs ｘ WO ｙ It is expressed as follows, and satisfies the relationships 0.010 ≤ x ≤ 1.2 and 2.0 ≤ y ≤ 3.0.

[0098] Polyester fiber F contains titanium dioxide particles in an extremely small amount (less than 0.3% by mass) to reduce gloss.

[0099] Furthermore, polyester fibers A through F all use polyethylene terephthalate as the polyester. [Examples 1-1 and 1-2] In Example 1-1, a knitted fabric product containing the first fiber and the second fiber in the proportions shown in Table 2 was manufactured and evaluated.

[0100] In Example 1-2, the fabric product manufactured in Example 1-1 was washed 50 times using the C4M method described in Annex E of JIS L 1930 (2024), and then evaluated.

[0101] The evaluation results are shown in Table 2. [Comparative Example 1-1, Comparative Example 1-2, Comparative Example 1-3] In Comparative Example 1-1, a knitted fabric product containing fibers in the proportions shown in Table 2 was manufactured. Comparative Example 1-1 does not contain the second fiber.

[0102] In Comparative Examples 1-2, knitted fabric products containing fibers in the proportions shown in Table 2 were manufactured. Comparative Examples 1-2 do not contain the first fiber.

[0103] In Comparative Examples 1-3, knitted fabric products containing fibers in the proportions shown in Table 2 were manufactured. Comparative Examples 1-3 do not contain the first and second fibers.

[0104] The evaluation results are shown in Table 2.

[0105] As shown in Table 2, the fabric products of Examples 1-1 and 1-2, which include the first and second fibers, were found to have superior ultraviolet shielding and near-infrared shielding rates compared to Comparative Examples 1-1, 1-2, and 1-3, which have the same basis weight, and it was confirmed that the temperature rise was also sufficiently reduced.

[0106] In contrast, Comparative Example 1-1, which did not contain the second fiber, was found to be inferior to Examples 1-1 and 1-2, but showed higher ultraviolet and near-infrared shielding rates. However, it was found that the cesium tungsten oxide particles contained in the first fiber absorbed near-infrared rays and generated heat, resulting in a significant temperature rise.

[0107] It was confirmed that the near-infrared shielding rate was low in all of the fabric products of Comparative Examples 1-2 and 1-3, which did not contain the first fiber. (2-2) Experimental Example 2 Using the fibers shown in Table 1, knitted fabric products were manufactured and evaluated to contain each fiber in the mass ratios shown in Table 3 and to have the basis weight shown in Table 3. The content ratio of each polyester fiber contained in the knitted fabric was selected by selecting the ratio of the number of fibers forming the knitted fabric. [Examples 2-1 to 2-3] In Examples 2-1 and 2-2, knitted fabric products containing the first fiber, second fiber, and third fiber in the ratios shown in Table 3 were manufactured and evaluated. The third fiber, polyester fiber D, and polyester fiber E have different zinc oxide particle content ratios.

[0108] In Example 2-3, a knitted fabric product was manufactured and evaluated under the same conditions as in Examples 2-1 and 2-2, except that the third fiber was changed to polyester fiber F.

[0109] The evaluation results are shown in Table 3. [Examples 2-4, 2-5, 2-6, 2-7] In Examples 2-4 to 2-7, polyester fiber B, which contains more cesium tungsten oxide particles than polyester fiber A, was used as the first fiber. Then, knitted fabric products were manufactured containing each fiber in the mass ratios shown in Table 3 and with the basis weights shown in Table 3, and evaluated.

[0110] The evaluation results are shown in Table 3. [Comparative Example 2-1] In Comparative Example 2-1, a knitted fabric product containing fibers in the proportions shown in Table 3 was manufactured. Comparative Example 2-1 does not contain the first fiber, second fiber, or third fiber.

[0111] As shown in Table 3, the fabric products of Examples 2-1 to 2-7, which include the first and second fibers, were found to be superior to Comparative Example 2-1, which has the same basis weight, in terms of ultraviolet shielding rate, near-infrared shielding rate, UV-A shielding rate, and UV-B shielding rate. Furthermore, it was confirmed that the fabric products of Examples 2-1 to 2-7 also sufficiently reduced temperature rise.

[0112] Comparing Example 2-3, which does not contain the third fiber, with Examples 2-1 and 2-2, which contain the third fiber, it can be confirmed that Examples 2-1 and 2-2 have even higher UV shielding rates, near-infrared shielding rates, UV-A shielding rates, and UV-B shielding rates. It can also be confirmed that Examples 2-1 and 2-2 reduce the temperature rise more effectively than Example 2-3. The same can be confirmed from a comparison between Examples 2-6 and 2-7.

[0113] Therefore, it can be confirmed that by including a third fiber containing zinc oxide particles, the ultraviolet shielding performance and near-infrared shielding performance of the fabric product can be enhanced and the temperature rise reduced. (2-3) Experimental Example 3 [Examples 3-1 to 3-6, Comparative Example 3-1, Comparative Example 3-2] A knitted fabric product was manufactured and evaluated by including polyester fiber A, which is the first fiber shown in Table 1, and polyester fiber C, which is the second fiber, in a mass ratio of 50% each, and having the basis weight shown in Table 4. The content ratio of each polyester fiber contained in the knitted fabric was selected by selecting the ratio of the number of fibers that form the knitted fabric.

[0114] The evaluation results are shown in Table 4.

[0115] As shown in Table 4, the basis weight is 50 g / m ２ More than 330g / m ２ The fabric products of Examples 3-1 to 3-6 below have a basis weight of 30 g / m². ２ Compared to Comparative Example 3-1, it was confirmed that both the ultraviolet shielding rate and the near-infrared shielding rate were superior, and the temperature rise was also sufficiently reduced.

[0116] Weight: 380 g / m ２ In comparative example 3-2, which is larger, it was confirmed that although the ultraviolet shielding rate and near-infrared shielding rate were excellent, the temperature rise was large. [Note] Embodiments of this disclosure are, for example, as follows.

[0117] (1) A fabric product containing synthetic fibers, with a basis weight of 50 g / m ２ More than 330g / m ２The following is a fabric product comprising a first fiber containing composite tungsten oxide particles and a second fiber containing titanium oxide particles in a proportion of 1% by mass or more.

[0118] (2) The fabric product according to (1), wherein the chemical fiber is one or more fibers selected from polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyamide, acrylic, and modacrylic.

[0119] (3) The fabric product according to (1) or (2), wherein the first fiber contains the composite tungsten oxide particles in a proportion of 0.02% by mass or more and 0.30% by mass or less.

[0120] (4) The fabric product according to any one of (1) to (3), further comprising a third fiber containing zinc oxide particles.

[0121] (5) The fabric product according to (4), wherein the third fiber contains zinc oxide particles in a proportion of 0.1% by mass or more and 5% by mass or less.

[0122] (6) A fabric product as described in any of (1) to (5), having an ultraviolet shielding rate of 80% or more and a near-infrared shielding rate of 60% or more when exposed to sunlight.

[0123] (7) A fabric product according to any of (1) to (6), wherein the temperature rise when exposed to sunlight for 30 minutes is 10°C or less.

[0124] (8) A fabric product as described in any of (1) to (7), which, after 50 washes, has an ultraviolet shielding rate of 80% or more and a near-infrared shielding rate of 60% or more when exposed to sunlight.

[0125] This application claims priority based on Japanese Patent Application No. 2025-057251, filed with the Japan Patent Office on 28 March 2025, and the entire contents of Japanese Patent Application No. 2025-057251 are incorporated herein by reference.

[0126] 10 Fiber containing added particles 11 Resin 11A Surface 12 Added particles CA Central axis

Claims

1. A fabric product containing synthetic fibers, with a basis weight of 50 g / m². ２ More than 330g / m ２ The following is a fabric product comprising a first fiber containing composite tungsten oxide particles and a second fiber containing titanium oxide particles in a proportion of 1% by mass or more.

2. The fabric product according to claim 1, wherein the chemical fiber is one or more fibers selected from polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyamide, acrylic, and modacrylic.

3. The fabric product according to claim 1 or claim 2, wherein the first fiber contains the composite tungsten oxide particles in a proportion of 0.02% by mass or more and 0.30% by mass or less.

4. The fabric product according to claim 1 or claim 2, further comprising a third fiber containing zinc oxide particles.

5. The fabric product according to claim 4, wherein the third fiber contains zinc oxide particles in a proportion of 0.1% by mass or more and 5% by mass or less.

6. The fabric product according to claim 1 or claim 2, wherein the ultraviolet shielding rate when irradiated with sunlight is 80% or more and the near-infrared shielding rate is 60% or more.

7. The fabric product according to claim 1 or claim 2, wherein the temperature rise when exposed to sunlight for 30 minutes is 10°C or less.

8. The fabric product according to claim 1 or claim 2, wherein, after 50 washes, the ultraviolet shielding rate when exposed to sunlight is 80% or more and the near-infrared shielding rate is 60% or more.

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