TW202345716A - Clothing fabric - Google Patents

Abstract

Provided is a clothing fabric containing polyester fibers, said clothing fabric: containing heat absorbing and radiating 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 being subjected to a water-absorbing and fast-drying treatment. Heat (infrared radiation) 2 from a body 1 is quickly absorbed by a fabric 3 in a large amount, which increases the heat dissipation amount 4 of the body and increases the cooling effect. In addition, evaporation of moisture in the fabric is promoted by the heat (infrared radiation), and the fabric is quickly dried. Because the fabric 3 is subjected to a water-absorbing and fast-drying treatment, the cooling effect due to the latent heat of evaporation of water is synergistically increased. Accordingly, the present invention provides a clothing fabric having high heat absorbing and radiating performance and water-absorbing and fast-drying performance.

Description

Fabric for clothing

The present invention relates to a clothing fabric with high heat absorption and radiation properties and water absorption and quick drying properties.

During exercise, as the body's heat generation increases, thermal comfort decreases. In addition, sweating also increases and the clothes cannot keep up with drying. The clothes become wet, which increases the weight of the clothes and hinders mobility. On the contrary, by making the clothes thinner, the thermal insulation becomes smaller and the heat dissipation becomes higher. At the same time, the total weight of the clothes can be kept low, but the sense of see-through will increase and problems will arise in wearing. In addition, since ordinary clothing does not actively increase heat release, the wet state of the clothing does not change, and the thermal comfort is insufficient. As a conventional technology, Patent Document 1 proposes composite oxide tungstate particles as an infrared shielding material. Patent Documents 2 and 3 propose a polyester fiber containing cesium tungsten oxide particles as photothermal conversion particles. Patent Document 4 proposes using a polyester fiber containing cesium tungsten oxide particles and titanium oxide particles as a fabric to use as an agricultural sunshade sheet. Prior technical literature patent documents

Patent Document 1: International Publication No. 2005/037932 Specification Patent Document 2: International Publication No. 2019/160109 Specification Patent Document 3: Japanese Patent Application Publication No. 2020-075989 Patent Document 4: Japanese Patent Application Publication No. 2021-070886

[Problem to be solved by the invention]

However, the above-mentioned conventional technology cannot fully utilize the thermal radiation properties and water-absorbing and quick-drying properties of fabrics for clothing.

The present invention provides a fabric for clothing, which has high heat-absorbing radiation properties and water-absorbing and quick-drying properties, in order to solve the above-mentioned conventional problems. [Technical means to solve the problem]

The present invention is a fabric for clothing, which contains polyester fiber, and is characterized in that the fabric includes: heat-absorbing radiation polyester fiber A containing cesium tungsten oxide particles and titanium oxide particles, and polyester fiber that does not contain cesium tungsten oxide particles. B. The above fabrics are treated with water absorption and quick drying. [Effects of the invention]

Regarding the clothing fabric of the present invention, the fabric actively absorbs infrared rays and at the same time promotes the emission. The absorbed heat promotes the evaporation of moisture on the fabric and maintains it in a dry state, thereby improving thermal comfort and mobility; It controls ultraviolet, visible light and infrared rays without any sense of see-through, making it suitable for wearing. Furthermore, by using the fabric containing the heat-absorbing radiation polyester fiber A and the polyester fiber B, the fabric actively absorbs the heat generated by the body and exhibits heat-absorbing radiation properties that promote heat release. In addition, body heat (infrared rays) is quickly and massively absorbed by the fabric, promoting body heat dissipation and improving the cooling effect. In addition, the moisture on the fabric uses heat (infrared rays) to promote evaporation, making the fabric dry quickly. Furthermore, since the fabric is treated to absorb water and dry quickly, the cooling effect caused by the latent heat of evaporation of water is multiplied. This fabric is particularly suitable as a sports clothing material due to its high heat radiation and water absorption and quick-drying properties.

The present invention is a clothing fabric containing polyester fiber, which includes: heat-absorbing radiation polyester fiber A containing cesium tungsten oxide particles and titanium oxide particles, and polyester fiber B that does not contain cesium tungsten oxide particles. Polyester fiber B can be a fiber commonly used in sportswear. Polyester fibers A and B can be short fiber (spun yarn), long fiber (silk yarn), worsted twisted yarn or a mixture of these. Polyester fibers A and B are blends, blended yarns, and doubled yarns. Individual yarns are supplied to a knitting machine to become a knitted fabric, or a plain woven fabric is obtained by feeding a plain loom. Regarding the single fiber fineness of the polyester fibers A and B, fibers commonly used in sportswear can be used, preferably 0.5 to 7 decitex.

The weight ratio of polyester fiber A and polyester fiber B is preferably A:B=10~90:90~10, more preferably A:B=15~85:90~10, and even more preferably A:B =20～80:90～10. Thereby, the thermal radiation properties can be maintained in a better state. When the fiber A exceeds 90, the fiber A will turn blue due to the cesium tungsten oxide particles, and the fabric will turn blue strongly, which tends to limit the color when it is made into clothes. When the fiber A is less than 10, there is a tendency that "the fabric cannot fully absorb infrared rays and cannot promote evaporation." Fiber A is preferably dispersed in the fabric and made into plain fabric or knitted fabric. For either warp knitting (wale direction) or weft knitting (course direction), it is preferable to have more than 1 fiber A per 1 inch. More preferably, there is more than 1 fiber A per 0.5 inches. In this way, the entire fabric absorbs infrared rays and promotes evaporation. When certain locations are densely packed and other locations are sparse, there will be locations where infrared absorption is insufficient, and the overall clothing will tend to be unable to promote evaporation.

When the polyester fiber A is 100% by weight, the cesium tungsten oxide particles are preferably 0.1 to 10% by weight, more preferably 0.2 to 8% by weight. Moreover, when the polyester fiber A is 100% by weight, the titanium oxide particles are preferably 0.1 to 2% by weight. The cesium tungsten oxide particles and titanium oxide particles are preferably of fiber grade, and the average particle size is preferably 0.1~0.8µm. The average particle size is determined by the laser diffraction/light scattering method and the "D50 (median particle size) of the cumulative particle size distribution based on volume". As this measuring device, for example, the laser diffraction/dispersion type inorganic particle distribution measuring device LA-950S2 manufactured by HORIBA, Ltd. is used.

Regarding the polyester fiber B that does not contain cesium tungsten oxide particles, when the polyester fiber B is 100% by weight, it is preferably more than 0% by weight and less than 5% by weight when it contains titanium oxide particles. .

The fabric of the present invention is treated with water absorption and quick drying. As an example of the water-absorbing and quick-drying treatment, the following treatment is preferred: in at least part of the polyester fibers A and B, at least part of the molecules of the hydrophilic polyester resin processing agent is absorbed into the fibers, and the remainder covers the surface of the polyester fibers. And hydrophilic. That is, at least part of the polyester fibers A and B have water-absorbing and quick-drying properties through hydrophilization. More preferably, the entire surface of the polyester fiber A is hydrophilized. The reason for this is that polyester fiber A can actively absorb body heat and improve the cooling effect caused by the latent heat of evaporation of water on the fiber surface.

The water-absorbing and quick-drying treatment agent (hydrophilic polyester resin processing agent) used in the present invention is preferably a processing agent that allows the polyester fiber to absorb (inhalation and diffusion) at least one of the above-mentioned processing agents through the same function as disperse dyes. part. As an example of this hydrophilic polyester resin processing agent, it is a linear copolymer in which the terminal groups of the polyester group and the hydrophilic group are bonded to each other. Block copolymers are preferred. The molecular weight is preferably 5,000 to 8,000, more preferably 6,000 to 7,000. The weight ratio of the polyester group to the hydrophilic group is preferably 90/10 to 10/90, more preferably 60/40 to 20/80. Examples of the hydrophilic group include polyethylene glycol, sodium 5-isophthalic acid sulfonate, 1,2,4-benzenetricarboxylic anhydride, and the like, and polyethylene glycol is more preferred. Such a processing agent is manufactured by Takamatsu Oil & Fat Co., Ltd. and has a product number of KMZ-902.

If a fiber structure containing polyester fiber is immersed and heated in an aqueous solution containing a hydrophilic polyester resin processing agent, at least a part of the polyester fiber, such as the amorphous part, will absorb at least a part of the hydrophilic polyester fiber. The polyester group part of the ester resin processing agent molecule, the surface of the polyester fiber will be covered and hydrophilized by the hydrophilic group of the above molecule. Through the immersion heat treatment, the size of the holes existing in the amorphous part of the polyester fiber will increase at a temperature above the glass transition point, and at least a part of the polyester base will enter the holes. After the impregnation heat treatment, since the temperature of the polyester fiber drops below the glass transfer point, the size of the pores in the amorphous part is restored, and at least part of the polyester base is sealed into the polyester fiber. Through this mechanism, it becomes a "very strong bond, but soft to the touch and does not hinder functionality." The molecular weight of 2 parts of the monomer (dimer) forming the basis of the polyester group that can enter the pores of the amorphous part of the polyester fiber is 200 to 1000, more preferably 250 to 800. The polyester group is a polymer composed of a majority of monomers such as polyethylene terephthalate bonded together. Since it is not a straight line but forms a three-dimensional shape, it is suitable for judging whether the molecular weight of the dimer has entered the pores. . When it is less than 200, the size of the dimer that forms the basis of the polyester base is smaller than the pores in the amorphous part, and the polyester base is easy to fall off from the pores in the amorphous part of the polyester fiber, resulting in weakened durability. In addition, when it exceeds 1000, even if the size of the pores in the amorphous part is increased at a temperature above the glass transition point, the dimer that becomes the basis of the polyester base is larger than this, so it cannot enter the pores in the amorphous part. middle. That is, since it is a hydrophilic polyester resin processing agent with a polyester group having an optimal molecular weight, it does not require curing (hardening) such as a curing catalyst, electron beam, or plasma irradiation. This makes it possible to provide a fiber structure that maintains good texture, has high durability, and has high antifouling properties, water absorbency, and diffusibility.

Relative to the processed polyester fiber, the hydrophilic polyester resin processing agent is preferably 0.1% to 10% owf, and more preferably 0.5% to 8% owf. When the OWF is less than 0.1%, the hydrophilic layer cannot be fully formed on the fiber surface. Even if it absorbs infrared rays, there is no sufficient moisture on the fiber surface, so the cooling effect caused by evaporation tends not to be obtained. When it is higher than 10%owf, a hydrophilic layer is formed on the fiber surface that is more than required, which hinders the absorption of infrared rays. The absorbed energy cannot be used to efficiently evaporate the water on the fiber surface, and the fabric continues to be wet, resulting in a low cooling effect. tendency.

The fabric of the present invention has the following properties. (1) Endothermic radiation: The cesium tungsten oxide particles in the fiber absorb the heat (infrared rays) generated by the body, improving thermal comfort. And because it also contains titanium oxide, it can absorb visible light and ultraviolet absorption. Infrared, visible light, and ultraviolet energy are used to "change the water phase on the fiber surface into a gaseous state" to promote the drying of the fabric. Because the cesium tungsten oxide particles in the fiber absorb the infrared rays reflected by the titanium oxide, energy can be captured more efficiently.

(2) Prevent see-through feeling: By containing cesium tungsten oxide particles and titanium oxide particles in the fiber, the absorption of infrared rays, visible light, and ultraviolet rays is improved. Cesium tungsten oxide particles have a small penetration of infrared rays, but a large penetration of visible light. Titanium oxide particles have small penetration of visible light and ultraviolet rays, but large penetration of infrared rays. Compared with cesium tungsten oxide particles, titanium oxide has greater reflection of visible light and infrared rays. In the same fiber, due to the presence of the above two species, the cesium tungsten oxide particles will inhibit the penetration of infrared rays reflected by the titanium oxide particles in the fiber. As a result, the penetration of all wavelengths of infrared rays, visible light, and ultraviolet rays is suppressed, thereby preventing the sense of see-through when worn. As for the degree of preventing see-through feeling, the visible light anti-see-through properties of the following comparative fabrics were evaluated visually based on JIS L1923: 2017 "Evaluation method for anti-see-through of fiber products". The above-mentioned comparative fabrics are: compared with the products of the present invention The fabric has the same weaving design and yarn thickness as the product of the present invention, and is composed of polyester yarn that does not contain cesium tungsten oxide particles and titanium oxide particles; the fabric of the product of the invention is preferably higher than the comparative fabric. Level 0.5 or above. More preferably, it is 1.0 or more levels higher. . In the same manner as above, the infrared anti-see-through properties of the fabric sample were evaluated visually using an infrared camera (trade name: PENTAX645Z IR, manufacturer: Ricoh Imaging Company, Ltd.). Compared with the comparative fabric, the fabric of the product of the present invention is preferably higher than level 0.5. More preferably, it is higher than level 1.0. The cesium tungsten oxide particles that can prevent the see-through feeling when wet absorb infrared rays and use the energy of infrared rays to promote the evaporation of fibrous moisture and inhibit the water retention of the fabric, thus preventing the see-through feeling when wet. Generally speaking, when the fabric is wet, it will form a film of water, thereby improving the sense of perspective. Therefore, it will also suppress the see-through feeling when it is dry, and at the same time promote the evaporation of water, reducing the water retention capacity of the fabric, thereby preventing the see-through feeling when it is wet. By containing both cesium tungsten oxide particles and titanium oxide particles, a synergistic effect appears, preventing the see-through feeling when wet. By processing the hydrophilic polyester resin processing agent, the evaporation of water is further promoted and the see-through feeling is prevented. Explain the method of evaluating the sense of perspective when wet. The following comparative fabric was used as a sample. The above-mentioned comparative fabric is: the fabric of the product of the present invention, the same weaving design and yarn thickness as the product of the present invention, and is made of polyester yarn that does not contain cesium tungsten oxide particles and titanium oxide particles. Made of lines. Drop 0.4 ml of water into the center of a 10 × 10 cm sample, and place it on the hot plate (40°C) of the KES-F7 cold and warm sensation tester manufactured by Kato Tech Co., Ltd. for 10 minutes. JIS L 1923: 2017 "Method for evaluation of anti-see-through properties of fiber products" uses the visual method to evaluate the anti-see-through properties of visible light. The fabric of the present invention is preferably 0.5 or more grades higher than the comparative fabric. More preferably, it is 1.0 or more levels higher. The same method as above was carried out, and the infrared anti-see-through properties were visually evaluated on the images obtained when the sample was observed with an infrared camera (trade name: PENTAX645Z IR, manufacturer: Ricoh Imaging Company, Ltd.). The fabric of the present invention is preferably 0.5 or more grades higher than the comparative fabric. More preferably, it is 1.0 or more levels higher.

(3) Air permeability: The air permeability of the fabric is measured by JIS L1096: 2010 (Fraser method). It is preferably more than 100cc/m2 ^· sec, more preferably 100~800cc/ ^m2 ·sec, and more preferably 100～700cc/m ² ·sec. The fabric of the present invention is preferably suitable for sportswear. If the air permeability is within the above range, the evaporation of gaseous sweat will increase, and liquid sweat is easy to dry, so it is suitable for cooling the human body through the latent heat of evaporation of water.

(4) Water absorbency: The dropwise addition method (JIS L 1907: 2004) is 10 seconds or less, preferably 5 seconds or less, more preferably 3 seconds or less, and still more preferably 1 second or less. Since the surface of the fabric is hydrophilized, the affinity between the fabric and water becomes greater and the water absorbency is improved.

(5) Diffusion: According to the diffusibility residual moisture rate test (compare ISO 17617: 2014 A-1 method (dropping 0.6ml of water)), the time to reach 10% is preferably within 55 minutes, and the time to reach 10% is It is better if it is within 50 minutes, and it is even better if the time to reach 10% is within 45 minutes. Because the surface of the fabric is hydrophilized, the affinity between the fabric and water becomes greater and the water absorption increases. Therefore, the diffusion in the horizontal direction of the fabric also increases. Due to the increased diffusivity, the evaporation of water increases and the quick-drying properties of the fabric also increase.

(6) Endothermic evapotranspiration: This is an indicator of the evapotranspiration of the fabric endowed with moisture when heated. The higher the evapotranspiration, the greater the heat of vaporization, which means improved heat dissipation. The evaluation method is shown below. Drop 0.2 ml of water into the center of a fabric sample 10 cm long and 10 cm wide, and place it on the hot plate (40°C) of the KES-F7 cold and warm feeling tester manufactured by Kato Tech Co., Ltd., and heat it with Visually measure the surface temperature of the fabric sample. In thermal imaging images, the temperature is lower where water exists. On the thermal imaging image, measure the time until the surface temperature of the fabric sample becomes consistent (hereinafter, expressed as evapotranspiration time). When the temperature on the surface of the fabric sample becomes consistent, it means that no moisture remains on the surface of the fabric. The shorter the evapotranspiration time, the higher the evapotranspiration. The evapotranspiration time is preferably within 10 minutes. In addition, the following comparative fabric was used as a fabric sample and evaluated. The comparative fabric had the same knitting design and yarn thickness as the product of the present invention, and was made of polyester yarn that did not contain cesium tungsten oxide particles and titanium oxide particles. It is composed of threads; compared with the comparative fabric, the evaporation time of the product of the present invention is preferably more than 1 minute faster.

The water-absorbing and quick-drying treatment method is to immerse and heat the fabric in an aqueous solution containing hydrophilic polyester resin processing agent molecules, so that at least part of the above-mentioned processing agent is absorbed into at least part of the polyester fiber, and the remaining part will be coated with the above-mentioned polyester. The fiber surface becomes hydrophilic. This can provide a fiber structure that maintains a good feel and has high stain resistance, water absorption, diffusibility, etc.

The immersion heat treatment is preferably performed by immersing the fiber structure in an aqueous solution containing a hydrophilic polyester resin processing agent, raising the temperature from normal temperature, and simultaneously performing heat treatment at a temperature of 110 to 135°C and a time of 20 to 120 minutes, and Cool and wash with water. After washing, it can be heated according to the usual method for tenter processing and shaping.

During immersion heat treatment, disperse dyes can be added for co-bath treatment. The reason is that the hydrophilic polyester resin processing agent used in the present invention is processed under the same heating conditions as disperse dyes.

The fabric of the present invention can be a fiber structure that has through-holes penetrating in the thickness direction of the fabric, and a water-repellent or hydrophobic zone is arranged at at least a part of the connection between the through-holes, and the polyester fiber A is equipped with a hydrophilic zone. When the through-holes are hung in a vertical direction in a state where the weight of the fabric for clothing is 100% and the moisture content is 300%, the through-holes maintain gaps. By using this fiber structure, since the through-hole voids are maintained even in a wet state, the polyester fiber A is easily in contact with the low-humidity external air, absorbs the energy of infrared rays, visible rays, and ultraviolet rays, and the water phase changes on the fiber surface. It is in gaseous state, which promotes evapotranspiration. In order to satisfy the above-mentioned fiber structure, as a method of realizing a water-repellent or hydrophobic area, polyester B may be water-repellent or hydrophobic, or a fiber other than polyester fiber A or polyester fiber B may be added that has water-repellent or hydrophobic properties. . When fibers treated with water-repellent or hydrophobic chemicals are used, even if the knitted plain fabric is soaked and heated for sweat-absorbing and quick-drying treatment, the polyester base of the water-absorbing and quick-drying treatment agent is not sealed into the fiber. As a fabric, It can take into account both water-repellent or hydrophobic areas and hydrophilic areas.

Hereinafter, a clothing fabric suitable for one embodiment of the present invention will be described using drawings. In the following figures, the same symbols represent the same object. Figure 1 shows a schematic diagram of the mechanism of heat absorption and radiation properties of fabric according to one embodiment of the present invention. The heat (infrared rays) 2 from the body 1 is quickly and massively absorbed by the fabric 3, promoting the body's heat dissipation 4 and improving the cooling effect. In addition, the moisture on the fabric is evaporated by heat (infrared rays), allowing the fabric to dry quickly. Since the fabric 3 is processed to absorb water and dry quickly, the cooling effect caused by the latent heat of evaporation of water is multiplied. In contrast, Figure 2 shows a conventional fabric 6. Compared with the fabric 3 of the present invention, the amount of movement of heat (infrared rays) 5 from the body 1 is lower, and the amount of heat dissipation 7 from the body is also lower.

Figure 3 shows a schematic cross-sectional illustration of the water-absorbing and quick-drying fiber 10 according to one embodiment of the present invention. The water-absorbing and quick-drying fiber is in a state in which the hydrophilic polyester processing agent is absorbed by the polyester fiber. At least part of the polyester group 12a of the hydrophilic polyester resin processing agent molecule 12 is absorbed into the amorphous part inside the polyester fiber 11, and the hydrophilic group 12b covers the surface of the polyester fiber 1. This can achieve highly durable antifouling properties, hygroscopicity, and diffusibility. [Example]

The following is a detailed description using an implementation example. Furthermore, the present invention is not limited to the following examples. The evaluation method is as follows. ＜Quality per unit area (code weight)＞ Measured according to JIS L1096:2010 A method. ＜Breathability＞ The air permeability of fabrics is measured according to JIS L1096:2010 (Fraser method). ＜Light transmittance, light reflectivity, light absorption rate＞ Using a spectrophotometer (UV-3100PC manufactured by Shimadzu Corporation) and an integrating sphere attachment, a cloth sample was set and irradiated with light having a wavelength of 280 to 2600 nm. The light that penetrates the fabric sample is collected by an integrating sphere. The measured value is divided by the value of the irradiated light and multiplied by 100 to obtain the light transmittance. Use an integrating sphere to collect the randomly reflected light on the surface of the fabric sample. Divide the measured value by the value of the irradiated light and multiply by 100 to obtain the light reflectance. Measure the transmittance and reflectance of fabric when irradiated with light with a wavelength of 280-2600nm. The light absorption rate of the fabric is calculated from the following formula. Light absorption rate of fabric = 100% - transmittance - reflectivity ＜Water evapotranspiration＞ Measure the amount of water evapotranspiration caused by infrared irradiation. Moisten 10×10cm cloth with 1.5ml (1.5g) of water, irradiate infrared rays generated by a 100,000 lux reflector from 150mm above the cloth, and measure the evapotranspiration based on the weight change after 10 minutes. ＜Water absorbency＞ The moisture absorption time was measured by the dropping method (JIS L1907: 2004). ＜Diffusion＞ Determined by diffusive residual moisture rate test (compare ISO 17617:2014 A-1 method (dropping 0.6mL water)). ＜Anti-see-through evaluation＞ ● Anti-see-through evaluation of visible light in a dry state According to JIS L 1923: 2017 "Method for evaluation of anti-see-through properties of fiber products", the visible light anti-see-through properties were comparatively evaluated using the visual method. ● Anti-see-through evaluation of infrared rays in a dry state In the same manner as above, the infrared anti-see-through properties of the fabric sample were comparatively evaluated visually using an infrared camera (trade name: PENTAX645Z IR, manufacturer: Ricoh Imaging Company, Ltd.). ● Anti-see-through evaluation of visible light under wet conditions Drop 0.4 ml of water into the center of a fabric sample 10 cm long and 10 cm wide, and place it on the hot plate (40°C) of the KES-F7 cold and warm feeling tester manufactured by Kato Tech Co., Ltd. for 10 minutes. Afterwards, the sample was taken out, and the visible light anti-see-through properties were comparatively evaluated by visual inspection in accordance with JIS L 1923:2017 "Method for Evaluation of Anti-See-through Properties of Fiber Products". Determine the perspective of the central part of the fabric sample with water added. ● Anti-see-through evaluation of infrared rays in wet conditions Drop 0.4 ml of water into the center of a fabric sample with a length of 10 cm and a width of 10 cm, and place it on the hot plate (40°C) of the KES-F7 cold and warm feeling tester manufactured by Kato Tech Co., Ltd. for 10 minutes. , then take out the fabric sample, and observe the fabric visually using an infrared camera (trade name: PENTAX645Z IR, manufacturer: Ricoh Imaging Company, Ltd.) in accordance with JIS L 1923: 2017 "Method for Evaluation of Anti-see-through Properties of Fiber Products" The image obtained during the test was used to evaluate the infrared anti-see-through properties. Determine the perspective of the central part of the fabric sample with water added. ＜Evaluation of endothermic evapotranspiration＞ Drop 0.2 ml of water into the center of a fabric sample with a length of 10 cm and a width of 10 cm, and place it on the hot plate (40°C) of the KES-F7 cold and warm feeling tester manufactured by Kato Tech Co., Ltd., and use Thermal imaging measures the surface temperature of fabric samples. In thermal imaging images, the temperature is lower where water exists. On the thermal imaging image, measure the time until the surface temperature of the fabric sample becomes consistent (hereinafter, expressed as evapotranspiration time). Figures 4A-D are diagrams depicting thermal imaging images of the endothermic evapotranspiration evaluation test. Regarding this thermal imaging image, drop 0.2 ml of water 15 in the center of the fabric sample 14, and place the fabric sample 14 on the hot plate 13. As an example: Figure 4A is the image after 1 minute. Figure 4B is the image after 5 minutes, Figure 4C is the image after 7 minutes, and Figure 4D is the image after 11 minutes. After 11 minutes, the water will completely evaporate. Measure the time until the water evaporates completely.

(Example 1) 1 Yarn used (1) Polyester fiber A: polyester (PET) multifilament yarn (total fineness 84decitex, number of filaments 48), false twisted yarn, added cesium tungsten oxide particles (Sumitomo Metal Manufactured by Mining Co., Ltd., trade name "CWO") 4wt%, titanium oxide particles (commercially available fiber grade) 0.1wt% (2) Polyester fiber B: polyester (PET) multifilament yarn (total fineness 84decitex, 48 yarns), false twisted yarn, added titanium oxide particles (commercially available fiber grade) 0.1wt% 2 Knitted fabric Knitted fabric (knitted fabric) knitted by a 24-needle circular knitting machine. The yarn of polyester fiber A is 45 mass%, the yarn of polyester fiber B is 55 mass%, the knitting number of warp knitting is 45 pieces/inch, and the weft knitting number is 51 pieces/inch. A photograph of the surface of the obtained knitted fabric is shown in Figure 5A, and a photograph of the back is shown in Figure 5B. 3 Water absorption and quick-drying treatment (1) Use chemicals as hydrophilic polyester resin, and use product number KMZ-902 manufactured by Takamatsu oil & Fat Co., Ltd. with 5% owf (abbreviation for on the weight of fiber). (2) Treatment conditions: The above knitted fabric is immersed in an aqueous solution containing 5% owf of the above agent and disperse dye (Saxon blue), and the temperature is raised from normal temperature to 130°C at a rate of 2°C/min, and treated at 130°C for 60 minutes. Carry out cooling, washing, drying and tentering heat setting. The mass per unit area (yard weight) of the obtained knitted fabric was 120g/m ² .

(Example 2) The process is the same as in Example 1 except that the Saxony blue of the disperse dye is changed to 5% o.w.f white.

(Example 3) The same procedure as in Example 1 was carried out except that the yarn of polyester fiber A was 90% by mass, the yarn of polyester fiber B was 10% by mass, and the disperse dye was 5% o.w.f white.

(Example 4) The same procedure was carried out as in Example 1 except that the yarn of polyester fiber A was 20 mass%, the yarn of polyester fiber B was 80 mass%, and the disperse dye was 5% o.w.f white.

(Example 5) The same procedure was carried out as in Example 1 except that the yarn of polyester fiber A was 10% by mass, the yarn of polyester fiber B was 90% by mass, and the disperse dye was 5% o.w.f white.

(Example 6) The yarn of polyester fiber A is 20% by mass, the yarn of polyester fiber B is 80% by mass, the code weight is 150g/m ² , the number of warp knits is 37 pieces/inch, and the weft knitting number is 37 pieces/inch. It is 33 pieces/inch, and the disperse dye is 5% owf white. Other than that, the method is the same as Example 1. A photograph of the surface of the obtained knitted fabric is shown in Figure 6A, and a photograph of the back is shown in Figure 6B.

(Comparative example 1) The same procedure as in Example 1 was performed except that 100% by mass of polyester fiber B was used.

(Comparative example 2) The same procedure as in Example 1 was performed except that 100% by mass of polyester fiber B was used and the disperse dye was 5% o.w.f white.

(Comparative example 3) The same procedure as in Example 1 was carried out except that 100% by mass of polyester fiber B was used, 5% o.w.f. white disperse dye was used, and no water absorbing agent was used.

(Comparative example 4) The yarn of polyester fiber A was 20% by mass, the yarn of polyester fiber B was 80% by mass, no hygroscopic agent was processed, and the disperse dye was 5% o.w.f white. The same procedure as in Example 1 was carried out.

(Comparative example 5) The same procedure as in Example 6 was performed except that 100% by mass of polyester fiber B yarn was used.

The above conditions and results are summarized below and shown in Tables 1 to 6. In addition, FIG. 7 shows a graph of the light transmittance of Examples 1 to 2 and Comparative Examples 1 to 2, and FIG. 8 shows a graph of the light reflectance of Examples 1 to 2 and Comparative Examples 1 to 2.

[Table 1] Yarn used (wt%) Code weight (g/ ^m2 ) Water absorbing and quick drying treatment Water absorption (seconds) Time (minutes) for the diffusible residual moisture content to reach 10% Air permeability (cc/cm ^2. seconds) Polyester A Polyester B Example 1 45 55 120 have 1 40 250 Example 2 45 55 120 have 1 40 250 Comparative example 1 0 100 120 have 1 55 250 Comparative example 2 0 100 120 have 1 55 250 Example 3 90 10 120 have 1 30 250 Example 4 20 80 120 have 1 45 250 Example 5 10 90 120 have 1 50 250 Comparative example 3 0 100 120 without 60 95 250 Comparative example 4 20 80 120 without 60 85 250 Example 6 20 80 150 have 1 45 95 Comparative example 5 0 100 150 have 1 60 95

As shown in Table 1, in Examples 1 and 2 compared with Comparative Examples 1 and 2, and in Example 6 compared with Comparative Example 5, the time required for the diffusible residual moisture content to reach 10% was shorter, indicating high-speed drying properties. In addition, in Examples 3 to 5, compared to Comparative Examples 3 to 4, the time required for the hygroscopic and diffusible residual moisture ratio to reach 10% was shorter, indicating high water absorption and quick drying properties.

[Table 2] tint of dyeing Ultraviolet light area (280-380nm) Average penetration rate (%) Average reflectance(%) Average absorption rate (%) Example 1 saxony 14.7 13.0 72.3 Example 2 White 25.2 15.6 59.2 Comparative example 1 saxony 17.3 14.9 67.8 Comparative example 2 White 29.7 18.6 51.6 Example 3 White 24.5 15.1 60.4 Example 4 White 25.4 15.7 58.9 Example 5 White 25.7 15.8 58.5 Comparative example 3 White 29.6 18.8 51.6 Comparative example 4 White 25.3 15.8 58.9 Example 6 White 20.4 16.1 63.5 Comparative example 5 White 25.8 19.3 54.9

[table 3] tint of dyeing Visible light area (380-780nm) Average penetration rate (%) Average reflectance(%) Average absorption rate (%) Example 1 saxony 21.0 26.4 52.6 Example 2 White 43.8 49.3 6.9 Comparative example 1 saxony 24.0 28.4 47.7 Comparative example 2 White 47.4 49.2 3.4 Example 3 White 42.2 47.7 10.1 Example 4 White 44.4 49.7 5.9 Example 5 White 45.1 49.9 5.0 Comparative example 3 White 47.5 49.1 3.4 Comparative example 4 White 44.5 49.7 5.8 Example 6 White 39.7 50.1 10.2 Comparative example 5 White 44.4 49.6 6.0

[Table 4] tint of dyeing Infrared light area (780-2600nm) Average penetration rate (%) Average reflectance(%) Average absorption rate (%) Example 1 saxony 35.2 45.8 19.0 Example 2 White 44.0 47.4 8.6 Comparative example 1 saxony 43.4 59.4 -2.8 Comparative example 2 White 51.6 53.6 -5.2 Example 3 White 34.5 41.8 23.7 Example 4 White 46.1 48.1 5.8 Example 5 White 47.5 49.7 2.8 Comparative example 3 White 51.4 53.3 -4.7 Comparative example 4 White 46.1 48.2 5.7 Example 6 White 40.4 49.8 9.8 Comparative example 5 White 49.7 53.5 -3.2

As shown in Tables 2 to 4, Example 1 is compared to Comparative Example 1, Example 2 is compared to Comparative Example 2, Examples 3 to 5 are compared to Comparative Examples 3 to 4, and Example 6 is compared to Comparative Example. 5. The average absorption rates in the respective ultraviolet, visible, and infrared regions are relatively high. In particular, the high average absorption rate in the infrared region has the following effects: it is easy to absorb the infrared rays generated by the body, and it is easy to absorb heat. The thermal energy changes the water phase from liquid to gas, thereby promoting drying.

[table 5] tint of dyeing Water evapotranspiration (g) Example 1 saxony 0.717 Example 2 White 0.643 Comparative example 1 saxony 0.614 Comparative example 2 White 0.513 Example 3 White 0.775 Example 4 White 0.639 Example 5 White 0.634 Comparative example 3 White 0.256 Comparative example 4 White 0.532 Example 6 White 0.551 Comparative example 5 White 0.491

As shown in Table 5, Example 1 is compared to Comparative Example 1, Example 2 is compared to Comparative Example 2, Examples 3 to 5 are compared to Comparative Examples 3 to 4, and Example 6 is compared to Comparative Example 5. Each has a higher water evapotranspiration. Therefore, by absorbing the energy of infrared rays and promoting vaporization, the high water absorption and quick drying effect can be confirmed.

(Comparative example 6) As polyester fiber C, use "polyester (PET) multifilament yarn (total fineness 84 decitex, number of filaments 48), false twisted yarn, fiber yarn without titanium oxide particles (commercially available fiber grade) used Line 100%", except for this, the same implementation as in Example 1 was carried out.

(Comparative example 7) As polyester fiber C, use "polyester (PET) multifilament yarn (total fineness 84 decitex, number of filaments 48), false twisted yarn, fiber yarn without titanium oxide particles (commercially available fiber grade) used Line 100%", and make the disperse dye 5% o.w.f white, except for this, the same procedure as in Example 1 was carried out.

(Comparative example 8) As polyester fiber C, use "polyester (PET) multifilament yarn (total fineness 84 decitex, number of filaments 48), false twisted yarn, fiber yarn without titanium oxide particles (commercially available fiber grade) used Line 100%", except for this, the same implementation as in Example 6 was carried out.

(1) Evaluation of anti-see-through in a dry state yields the following results. ● Anti-see-through evaluation of visible light After evaluation of Example 1 and Comparative Example 6, the grade of Example 1 using the visual method is 0.5 levels higher than that of Comparative Example 6. After evaluation of Example 2 and Comparative Example 7, the grade of Example 2 using the visual method is 1.0 grade higher than that of Comparative Example 7. After evaluation of Example 6 and Comparative Example 8, the grade of Example 6 using the visual method is 0.5 levels higher than that of Comparative Example 8. ● Infrared anti-see-through evaluation After evaluation of Example 1 and Comparative Example 6, the grade of Example 1 using the visual method is 1.0 grade higher than that of Comparative Example 6. After evaluation of Example 2 and Comparative Example 7, the grade of Example 2 using the visual method is 1.0 grade higher than that of Comparative Example 7. After evaluation of Example 6 and Comparative Example 8, the grade of Example 6 using the visual method is 0.5 levels higher than that of Comparative Example 8.

(2) Evaluation of anti-see-through in a wet state yields the following results. ● Anti-see-through evaluation of visible light After evaluation of Example 1 and Comparative Example 6, the grade of Example 1 using the visual method is 1.0 grade higher than that of Comparative Example 6. After evaluation of Example 2 and Comparative Example 7, the grade of Example 2 using the visual method is 1.5 levels higher than that of Comparative Example 7. After evaluation of Example 6 and Comparative Example 8, the grade of Example 6 using the visual method is 0.5 levels higher than that of Comparative Example 8. ● Infrared anti-see-through evaluation After evaluation of Example 1 and Comparative Example 6, the grade of Example 1 using the visual method is 1.5 levels higher than that of Comparative Example 6. After evaluation of Example 2 and Comparative Example 7, the grade of Example 1 using the visual method is 1.5 levels higher than that of Comparative Example 6. After evaluation of Example 6 and Comparative Example 8, the grade of Example 1 using the visual method is 0.5 grades higher than that of Comparative Example 6.

(3) Evaluation of endothermic evaporation properties is shown in Table 6. [Table 6] dyeing color Evaporation time (minutes) Example 1 saxony 5 Example 2 White 6 Comparative example 1 saxony 11 Comparative example 2 White 11 Example 3 White 4 Example 4 White 6 Example 5 White 8 Comparative example 3 White 17 Comparative example 4 White 14 Example 6 White 6 Comparative example 5 White 13

As shown in Table 6, Example 1 is compared to Comparative Example 1, Example 2 is compared to Comparative Example 2, Examples 3 to 5 are compared to Comparative Examples 3 to 4, and Example 6 is compared to Comparative Example 5. Each has a faster evapotranspiration time. Therefore, vaporization is promoted by absorbing the energy of infrared rays and high evaporation properties are confirmed.

Next, 20 healthy male subjects wore short-sleeved shirts made of the fabrics of Example 2 and Comparative Example 2 and performed running exercises. The numerical value (5: good, 4: fair, 3: average, 2: slightly poor, 1: poor) is subjective when wearing, and the average value of 20 people in each item is displayed.

[Table 7] Drying of sweat on clothes Stickiness on clothes caused by sweat Cooling properties of clothing body perspective Example 2 4.3 4.1 4.1 3.3 Comparative example 2 3.1 3.2 3.1 204

As shown in Table 7, compared with the short-sleeved shirt of Comparative Example 2, the short-sleeved shirt of Example 2 dries the sweat on the clothes quickly, has less stickiness caused by sweat on the clothes, has high cooling properties, and is transparent to the body. The degree is low and the overall wearing feeling is good.

As shown above, the water absorbency of the fabrics in each example is less than 10 seconds, and the time for the diffusivity to reach 10% is less than 55 minutes. Each of them is qualified, and the hand feel is good and soft. In addition, the fabric actively absorbs infrared rays and promotes the emission. The absorbed heat promotes the evaporation of moisture on the fabric and keeps it dry. This can be confirmed to improve thermal comfort and mobility. In addition, by controlling ultraviolet, visible light, and infrared rays, it can be confirmed that there is no see-through feeling and it is suitable for wearing. Furthermore, it was confirmed that the fabric containing the heat-absorbing radiative polyester fiber A and polyester fiber B actively absorbs the heat generated by the body and exhibits the heat-absorbing radiative property that promotes the release; and, The heat from the body (infrared rays) is quickly and massively absorbed by the fabric, promoting the body's heat dissipation and improving the cooling effect; the moisture on the fabric promotes evaporation through heat (infrared rays), making the fabric dry quickly; because the fabric has been treated with water absorption and quick drying , the cooling effect caused by the latent heat of evaporation of water is multiplied, and this fabric has high thermal radiation and water absorption and quick-drying properties, making it particularly suitable as a fabric for sportswear. [Industrial utilization possibility]

The fabric of the present invention is suitable for underwear such as sweatshirts, T-shirts, inner shirts, underwear, stockings, general shirts, underwear, etc., and also includes mid-layer clothing and outerwear. In addition, because of its high cooling effect, it is also beneficial to cool-feeling business clothing.

1: body 2,5: Heat (infrared) 3,6:fabric 4,7: heat dissipation 10: Heat-absorbing and quick-drying fiber 11:Polyester fiber 12: Hydrophilic polyester resin processing agent molecules 12a: At least part of polyester base 12b: Hydrophilic group 13:Hot plate 14: Fabric sample 15:Water

[Fig. 1] is a schematic diagram showing the mechanism of heat absorption and radiation properties of the fabric according to one embodiment of the present invention. [Figure 2] is a schematic diagram showing the mechanism of heat absorption and radiation properties of conventional fabrics. [Fig. 3] is a schematic cross-sectional explanatory diagram showing the water-absorbing and quick-drying fiber according to one embodiment of the present invention. [Fig. 4] A to D are diagrams depicting thermal imaging images of the endothermic evapotranspiration evaluation test. [Fig. 5] A is a photograph of the surface of the knitted fabric according to Example 1 of the present invention, and B is a photograph of the back surface. [Fig. 6] A is a photograph of the surface of the knitted fabric according to Example 6 of the present invention, and B is a photograph of the back surface. [Fig. 7] is a graph showing the light transmittance of Examples and Comparative Examples of the present invention. [Fig. 8] is a graph showing the light reflectivity of Examples and Comparative Examples of the present invention.

1: body

2: Heat (infrared)

3:fabric

4: Heat dissipation

Claims (10)

A kind of cloth for clothing, which contains polyester fiber and is characterized by: The above-mentioned fabric includes: heat-absorbing and radiative polyester fiber A containing cesium tungsten oxide particles and titanium oxide particles, and polyester fiber B without cesium tungsten oxide particles; The above fabrics are treated to absorb water and dry quickly. As claimed in Claim 1, the fabric for clothing is subjected to the above-mentioned water absorption and quick-drying treatment. In at least a part of the above-mentioned polyester fibers A and B, at least a part of the hydrophilic polyester resin processing agent molecules are absorbed into the fibers, and the remaining ones are covered The surface of the above-mentioned polyester fiber becomes hydrophilic. For example, the clothing fabric of claim 1 or 2, wherein the weight ratio of the above-mentioned polyester fiber A and the above-mentioned polyester fiber B is A:B=10~90:90~10. The clothing fabric of claim 1 or 2, wherein the polyester fiber A contains 0.1 to 10 wt% of cesium tungsten oxide particles and 0.1 to 2 wt% of titanium oxide particles when the polyester fiber A is 100 wt%. The clothing fabric of Claim 1 or 2, wherein the polyester fiber B containing no cesium tungsten oxide particles is such that when the polyester fiber B is 100% by weight, it does not contain titanium oxide particles, or when it contains titanium oxide particles. Contains more than 0% by weight and less than 5% by weight. For example, the fabric for clothing according to claim 1 or 2, wherein the air permeability of the fabric is 100cc/m2 ^· second or more as measured by JIS L1096:2010 (Fraser method). For example, the fabric for clothing according to claim 1 or 2, wherein the water absorption time of the fabric is 10 seconds or less as measured by JIS L1907:2004 (dropping method). For example, the fabric for clothing in claim 1 or 2, wherein the moisture diffusivity of the above fabric reaches 10% in the diffusibility residual moisture rate test (using ISO 17617:2014 A-1 method (0.6 mL of water is added dropwise)) Within 55 minutes. For example, claim 1 or 2 for fabrics for clothing, wherein the above-mentioned fabrics are knitted fabrics. The clothing fabric described in claim 1 or 2, wherein the above-mentioned fabric is a sports clothing fabric.