Fabric for clothing

Abstract

The garment fabric containing the polyester fibers comprises heat absorption and heat dissipation polyester fibers A and polyester fibers B. The heat absorption and heat dissipation polyester fibers A contain cesium tungsten oxide particles and titanium oxide particles, the polyester fibers B do not contain cesium tungsten oxide particles, and the fabric is subjected to water absorption and quick drying treatment. The heat (infrared ray) 2 from the body (1) is quickly and largely absorbed by the fabric (3), thereby promoting the heat dissipating capacity (4) of the body and improving the cooling effect. In addition, evaporation of moisture on the fabric is promoted by utilizing heat (infrared rays), so that the fabric is quickly dried. Due to the fact that the fabric (3) is subjected to water absorption and quick drying treatment, the cooling effect brought by evaporation latent heat of water is synergistically improved. This makes it possible to provide a garment fabric having high heat absorption and heat dissipation properties and high water absorption and quick drying properties.

Description

Technical Field

[0001] The invention relates to a clothing fabric with high heat absorption and heat dissipation properties and water absorption and quick-drying properties. Background Art

[0002] During exercise, the body generates more heat, and thermal comfort decreases. In addition, sweating increases, and clothes do not have time to dry, so they become wet, which increases the weight of the clothes and hinders mobility. In contrast, by making clothes thinner and reducing insulation, the total weight of the clothes can be kept low while increasing heat release, but the sense of transparency increases, which is problematic when wearing. In addition, ordinary clothes do not increase active heat release, and the wet state of the clothes does not change, so thermal comfort is insufficient.

[0003] As a prior art, Patent Document 1 proposes using composite tungsten oxide particles as an infrared shielding material. Patent Documents 2 and 3 propose polyester fibers containing cesium tungsten oxide particles as light-heat conversion particles. Patent Document 4 proposes making polyester fibers containing cesium tungsten oxide particles and titanium oxide particles into fabrics and using them as agricultural sunshade cloth.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2005 / 037932

[0007] Patent Document 2: International Publication No. 2019 / 160109

[0008] Patent Document 3: Japanese Patent Application Publication No. 2020-075989

[0009] Patent Document 4: Japanese Patent Application Publication No. 2021-070886 Summary of the invention

[0010] Problems to be solved by the invention

[0011] However, the above-mentioned prior art cannot fully exert the heat dissipation and water absorption and quick-drying properties as clothing fabrics.

[0012] The present invention aims to solve the above-mentioned conventional problems and to provide a clothing fabric having high heat absorption and heat dissipation properties and high water absorption and quick-drying properties.

[0013] Means of solving problems

[0014] The clothing fabric of the present invention is characterized in that it is a clothing fabric containing polyester fibers, wherein the fabric contains heat-absorbing and heat-dissipating polyester fibers A and polyester fibers B, the heat-absorbing and heat-dissipating polyester fibers A contain cesium tungsten oxide particles and titanium oxide particles, the polyester fibers B do not contain cesium tungsten oxide particles, and the fabric has been subjected to a water-absorbing and quick-drying treatment.

[0015] Effects of the Invention

[0016] In the clothing fabric of the present invention, the fabric actively absorbs infrared rays and promotes release, and at the same time utilizes the absorbed heat to promote the evaporation of moisture on the fabric, maintains a dry state, thereby improving thermal comfort and mobility, and by controlling ultraviolet rays, visible light, and infrared rays, it is made transparent and suitable for wearing. In addition, by utilizing a fabric containing heat-absorbing and heat-dissipating polyester fibers A and polyester fibers B, the heat-absorbing and heat-dissipating properties of the fabric are actively absorbed by the fabric and promoted to release. In addition, the heat (infrared rays) emitted from the body is rapidly and massively absorbed by the fabric, which can promote the heat dissipation of the body and improve the cooling effect. In addition, the evaporation of moisture on the fabric is promoted by heat (infrared rays), so that the fabric quickly dries. Furthermore, since the fabric has undergone a water-absorbing and quick-drying treatment, the cooling effect brought about by the latent heat of evaporation of water is synergistically improved. This fabric is particularly suitable for sportswear due to its high heat dissipation and water-absorbing and quick-drying properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] [ Figure 1 ] Figure 1 Schematic diagram showing the mechanism of heat absorption and heat dissipation of a fabric according to an embodiment of the present invention.

[0018] [ Figure 2 ] Figure 2 This is a schematic diagram showing the mechanism of heat absorption and heat dissipation of existing fabrics.

[0019] [ Figure 3 ] Figure 3 This is a schematic cross-sectional explanatory view showing a water-absorbent quick-drying fiber according to one embodiment of the present invention.

[0020] [ Figure 4 ] Figure 4 AD are diagrams showing thermographic images of the endothermic evaporability evaluation test.

[0021] [ Figure 5 ] Figure 5 A is a surface photograph of the knitted fabric of Example 1 of the present invention, Figure 5 B is a photo of its back.

[0022] [ Figure 6 ] Figure 6 A is a surface photograph of the knitted fabric of Example 6 of the present invention, Figure 6 B is a photo of its back.

[0023] [ Figure 7 ] Figure 7 It is a graph showing the light transmittance of Examples of the present invention and Comparative Examples.

[0024] [ Figure 8 ] Figure 8 It is a graph showing the light reflectance of Examples of the present invention and Comparative Examples. DETAILED DESCRIPTION

[0025] The present invention is a clothing fabric containing polyester fiber, which contains heat-absorbing and heat-dissipating polyester fiber A and polyester fiber B, wherein the heat-absorbing and heat-dissipating polyester fiber A contains cesium tungsten oxide particles and titanium oxide particles, and the polyester fiber B does not contain cesium tungsten oxide particles. The polyester fiber B can use fibers commonly used in sportswear. The polyester fibers A and B can be made into fabrics by short fibers (spun yarns), long fibers (filaments), worsted twisted yarns, or by mixing them. The polyester fibers A and B are knitted fabrics made by supplying blended, mixed filaments, plied yarns, and separated yarns to a knitting machine, or are made into fabrics by supplying them to a loom. The single fiber fineness of the polyester fibers A and B can use fibers commonly used in sportswear, preferably 0.5 to 7 decitex.

[0026] The weight ratio of polyester fiber A to polyester fiber B is preferably A:B=10-90:90-10, more preferably A:B=15-85:90-10, and further preferably A:B=20-80:90-10. Thus, heat dissipation can be maintained in an ideal state. When fiber A exceeds 90, fiber A becomes blue due to cesium tungsten oxide particles, so the fabric has a strong blue color, and there is a tendency that the color tone is limited when it is made into clothes. When fiber A is less than 10, the fabric cannot fully absorb infrared rays and tends to be unable to promote evaporation. Fiber A is preferably dispersed in the fabric to form a knitted fabric or a woven fabric. Preferably, there are more than one fiber A per inch in either the longitudinal direction or the horizontal direction. More preferably, there are more than one fiber A per 0.5 inch. In this way, infrared rays can be absorbed by the entire fabric and evaporation can be promoted. When it becomes dense in a specific place and sparse in other places, there will be places where infrared rays are insufficiently absorbed, and as a whole, there is a tendency that evaporation cannot be promoted.

[0027] When the polyester fiber A is set to 100% by weight, the cesium oxide tungsten particles are preferably 0.1 to 10% by weight, and more preferably 0.2 to 8% by weight. In addition, when the polyester fiber A is set to 100% by weight, the titanium oxide particles are preferably 0.1 to 2% by weight. The cesium oxide tungsten particles and titanium oxide particles are preferably fiber grade, and the average particle size is preferably 0.1 to 0.8 μm. The average particle size is the D50 (median particle size) of the cumulative particle size distribution based on the volume standard measured by the laser diffraction light scattering method. As the measuring instrument, for example, there is a laser diffraction / scattering inorganic particle distribution measuring device LA-950S2 manufactured by Horiba.

[0028] When the polyester fiber B is 100 wt %, the polyester fiber B not containing cesium oxide tungsten particles preferably does not contain titanium oxide particles, or contains titanium oxide particles in an amount exceeding 0 wt % and not more than 5 wt %.

[0029] The fabric of the present invention has been subjected to a water absorption and quick-drying treatment. As an example of the water absorption and quick-drying treatment, the following treatment is preferred: on at least a portion of the polyester fibers A and B, at least a portion of the hydrophilic polyester resin processing agent molecules are absorbed into the fibers, and the remaining portion covers the surface of the polyester fibers to be hydrophilized. That is, by hydrophilization, at least a portion of the polyester fibers A and B has water absorption and quick-drying properties. It is more preferred to hydrophilize the entire surface of the polyester fiber A. This is because the polyester fiber A can actively absorb the heat emitted from the body and improve the cooling effect brought about by the latent heat of evaporation of water on the fiber surface.

[0030] The water-absorbing quick-drying treatment agent (hydrophilic polyester resin processing agent) used in the present invention is preferably an agent in which at least a part of the aforementioned processing agent is absorbed (absorption and diffusion) into the polyester fiber through the same function as disperse dyes. As an example, the hydrophilic polyester resin processing agent is a copolymer in which a polyester group and an end group of a hydrophilic group are bonded to each other in a linear state. It is preferably a block copolymer. The molecular weight is preferably 5000 to 8000, and more preferably 6000 to 7000. The weight ratio of the polyester group to the hydrophilic group is preferably 90 / 10 to 10 / 90, and more preferably 60 / 40 to 20 / 80. As the hydrophilic group, there are polyethylene glycol, 5-sodium sulfoisophthalate, trimellitic anhydride, etc., and polyethylene glycol is more preferred. As the above-mentioned processing agent, there is product number KMZ-902 manufactured by Takamatsu Oil & Fats Co., Ltd.

[0031] If a fiber structure containing polyester fibers is immersed and heated in an aqueous solution containing a hydrophilic polyester resin processing agent, at least a portion of the polyester fiber, for example, at least a portion of the polyester group portion of the hydrophilic polyester resin processing agent molecule absorbed in the amorphous portion, and the surface of the polyester fiber is covered with the hydrophilic group of the aforementioned molecule and hydrophilized. By the immersion and heat treatment, the size of the pores existing in the amorphous portion of the polyester fiber becomes larger at a temperature above the glass transition temperature, and at least a portion of the polyester group enters the pores. After the immersion and heat treatment, the temperature of the polyester fiber drops below the glass transition temperature, whereby the size of the pores in the amorphous portion returns to its original state, and at least a portion of the polyester group is sealed in the polyester fiber. According to this structure, although it is a very strong bond, it feels soft and becomes a form that does not hinder functionality. The molecular weight of the two monomer parts (dimers) that are the basis of the polyester group that can enter the pores of the amorphous portion of the polyester fiber is preferably 200 to 1000, and more preferably 250 to 800. The polyester base is a polymer formed by combining many monomers such as polyethylene terephthalate. Since it is not a straight line but a three-dimensional shape, the molecular weight of the dimer is suitable for judging whether it can enter the hole. In the case of less than 200, the size of the dimer as the basis of the polyester base is smaller than the hole of the amorphous part, and the polyester base is easy to escape from the hole of the amorphous part of the polyester fiber, and the durability is weakened. In addition, in the case of more than 1000, at a temperature above the glass transition temperature, even if the size of the hole of the amorphous part becomes larger, the dimer as the matrix of the polyester base is larger than it, so it will not enter the hole of the amorphous part. That is, since it is a hydrophilic polyester resin processing agent with a polyester base of a preferred molecular weight, curing by curing catalyst, electron beam, plasma irradiation, etc. is not required. As a result, a fiber structure with good hand feel, high durability, high antifouling properties, water absorption, diffusivity, etc. can be provided.

[0032] The hydrophilic polyester resin processing agent is preferably 0.1% to 10% owf, more preferably 0.5% to 8% owf, relative to the processed polyester fiber. In the case of less than 0.1% owf, a sufficient hydrophilic layer cannot be formed on the fiber surface, and even if infrared rays are absorbed, there is not enough moisture on the fiber surface, and there is a tendency that the cooling effect brought about by evaporation cannot be obtained. In the case of more than 10% owf, a hydrophilic layer more than necessary is formed on the fiber surface, which hinders infrared absorption, and the absorbed energy cannot be used to effectively evaporate the water on the fiber surface. The fabric remains wet, and the cooling effect tends to decrease.

[0033] The fabric of the present invention has the following properties.

[0034] (1) Heat absorption and heat dissipation: The cesium tungsten oxide particles in the fiber absorb the heat (infrared rays) emitted from the body, improving thermal comfort. In addition, by also containing titanium oxide, it can absorb visible light and ultraviolet light absorption. The energy of infrared rays, visible light, and ultraviolet rays is used to convert the water phase on the fiber surface into a gas phase, promoting the drying of the fabric. Because the cesium tungsten oxide particles can absorb the infrared rays reflected by titanium oxide in the fiber, they can effectively capture energy.

[0035] (2) Anti-transparency: By containing cesium tungsten oxide particles and titanium oxide particles in the fiber, the absorption of infrared, visible light, and ultraviolet rays can be improved. Cesium tungsten oxide particles have low transmission of infrared rays, but high transmission of visible light. Titanium oxide particles have low transmission of visible light and ultraviolet rays, but high transmission of infrared rays. Titanium oxide reflects more visible light and infrared rays than cesium tungsten oxide particles. Since the above two particles exist in the same fiber, the infrared rays reflected by the titanium oxide particles in the fiber can be suppressed by the cesium tungsten oxide particles. As a result, the transmission of all wavelengths of infrared, visible light, and ultraviolet rays is suppressed, so the sense of transparency can be prevented when worn.

[0036] As the degree of prevention of transparency, the fabric of the product of the present invention and the comparative fabric composed of polyester yarn with the same weaving design and yarn thickness as the product of the present invention but without cesium tungsten oxide particles and titanium oxide particles are used to evaluate the visible light penetration resistance by visual method according to JIS L1923:2017 "Method for evaluating the anti-transparency of fiber products". The fabric of the product of the present invention is preferably 0.5 grades higher than the comparative fabric. More preferably, it is 1.0 grades higher. In the same way as above, the infrared penetration resistance is evaluated by visual method on the image when observing the fabric sample using an infrared camera (trade name: PENTAX645Z IR, manufacturer: Ricoh Imaging Co., Ltd.). The fabric of the product of the present invention is preferably 0.5 grades higher than the comparative fabric. More preferably, it is 1.0 grades higher.

[0037] Cesium tungsten oxide particles that can prevent the sense of transparency when wet can absorb infrared rays, so the energy of infrared rays is used to promote the evaporation of fibrous water, suppress the water retention of the fabric, and prevent the sense of transparency when wet. Generally speaking, in a wet state, a water film can be formed on the fabric, thereby improving the sense of transparency. Therefore, even when dry, the sense of transparency can be suppressed, and the evaporation of water is promoted, and the water retention of the fabric is reduced, thereby preventing the sense of transparency when wet. By containing both cesium tungsten oxide particles and titanium oxide particles, a synergistic effect can be exerted to prevent the sense of transparency when wet. By processing the hydrophilic polyester resin processing agent, the evaporation of water can be further promoted to prevent the sense of transparency.

[0038] The following is a description of the method for evaluating the sense of transparency when wet. The fabric of the product of the present invention and the comparative fabric composed of polyester yarn with the same weaving design and yarn thickness as the product of the present invention but without cesium tungsten oxide particles and titanium oxide particles are used as samples. 0.4 ml of water is dripped into the central part of the 10×10 cm sample, and it is placed on the hot plate (40°C) of KES-F7 ThermoLab manufactured by KATOTECH Co., Ltd. for 10 minutes, and then the visible light barrier is evaluated by visual method according to JIS L 1923:2017 "Method for evaluating the barrier properties of fiber products". The fabric of the product of the present invention is preferably 0.5 grades higher than the comparative fabric. More preferably, it is 1.0 grades higher. As described above, the infrared barrier property is evaluated by visual method on the image when observing the fabric sample using an infrared camera (trade name: PENTAX645Z IR, manufacturer: Ricoh Imaging Co., Ltd.). The fabric of the product of the present invention is preferably 0.5 grades higher than the comparative fabric. More preferably, it is 1.0 grades higher.

[0039] (3) Air permeability: The air permeability of the fabric is measured by JIS L1096:2010 (Frazier method) and is preferably 100cc / m 2 · seconds or more, more preferably 100 to 800 cc / m 2 · seconds, more preferably 100 to 700 cc / m 2 ·Second.

[0040] 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 increases, and liquid sweat is easily dried, which is suitable for cooling the human body through the latent heat of evaporation of water.

[0041] (4) Water absorption: The drop method (JIS L 1907:2004) is 10 seconds or less, preferably 5 seconds or less, more preferably 3 seconds or less, and even more preferably 1 second or less. When the surface of the fabric is hydrophilized, the affinity of the fabric with water increases, and the water absorption is improved.

[0042] (5) Diffusibility: In the diffusibility residual moisture content test (ISO 17617:2014A-1 method is applicable by analogy (adding 0.6 mL of water)), the time to reach 10% is preferably within 55 minutes, the time to reach 10% is more preferably within 50 minutes, and the time to reach 10% is further preferably within 45 minutes. By making the surface of the fabric hydrophilic, the affinity of the fabric with water becomes greater and the water absorption increases. Therefore, the diffusibility in the horizontal direction of the fabric also increases. As the diffusibility increases, the evaporation of water increases, and the quick-drying property of the fabric also increases.

[0043] (6) Endothermic evaporation: This is an index that indicates the evaporation of a fabric that has been hydrated when heated. The higher the evaporation, the greater the heat of vaporization and the higher the heat dissipation. The evaluation method is as follows.

[0044] 0.2 ml of water is dripped into the center of a fabric sample with a length of 10 cm in the vertical direction and 10 cm in the horizontal direction, and the sample is placed on a hot plate (40°C) of KES-F7 Thermolab manufactured by KATOTECH Co., Ltd., and the surface temperature of the fabric sample is measured with a thermal imager. In the thermal imaging image, the temperature of the area where water is present is displayed as lower. In the thermal imaging image, the time required for the surface temperature of the fabric sample to become uniform is measured (hereinafter referred to as the evaporation time). The temperature of the surface of the fabric sample becomes uniform, indicating that there is no residual moisture on the surface of the fabric. The shorter the evaporation time, the higher the volatility. The evaporation time is preferably within 10 minutes. In addition, a comparative fabric composed of polyester yarn having the same weaving design and yarn thickness as the product of the present invention but not containing cesium tungsten oxide particles and titanium oxide particles is used as a fabric sample and evaluated. It is preferred that the product of the present invention has an evaporation time that is more than 1 minute faster than the comparative fabric.

[0045] The water absorption and quick-drying treatment method is: the fabric is immersed in an aqueous solution containing hydrophilic polyester resin processing agent molecules for heating treatment, so that at least a part of the polyester fiber absorbs at least a part of the processing agent, and the remaining part covers the surface of the polyester fiber to be hydrophilized. In this way, a fiber structure with good hand feel, high antifouling properties, water absorption, and diffusion properties can be provided.

[0046] Regarding the immersion heat treatment, it is preferred to immerse the fiber structure in an aqueous solution containing a hydrophilic polyester resin processing agent, heat it from room temperature, heat it at 110 to 135°C for 20 to 120 minutes, cool it, and wash it with water. After washing, it can be heated and stretched to shape in a conventional manner.

[0047] During the immersion heat treatment, disperse dyes may also be added for the same bath treatment because the hydrophilic polyester resin processing agent used in the present invention is treated under the same heating conditions as the disperse dyes.

[0048] The fabric of the present invention may also be a fiber structure having through holes penetrating along the thickness direction of the fabric, a waterproof or hydrophobic region is arranged on at least a portion connected to the through holes, a hydrophilic region is arranged on the polyester fiber A, and the through holes maintain gaps when the through holes are suspended in a vertical direction in a state of being wetted with 300% water relative to 100% of the fabric weight of the above clothing fabric. By making this fiber structure, the gaps of the through holes can be maintained even in a wet state, so that the polyester fiber A becomes easy to contact with low-humidity external air, absorbs the energy of infrared rays, visible light, and ultraviolet rays, and further promotes the water phase on the fiber surface to change into a gas phase and evaporate. In order to satisfy the above fiber structure, as a method for realizing the waterproof or hydrophobic region, the polyester fiber B may also have waterproof or hydrophobic properties, or a fiber having waterproof or hydrophobic properties may be added to the polyester fiber A and the polyester fiber B. If fibers treated with waterproof or hydrophobic chemicals are used, even if the woven fabric is subjected to a sweat-absorbing and quick-drying treatment during an immersion heat treatment, the polyester base of the water-absorbing and quick-drying treatment agent will not be encapsulated in the fibers. Therefore, as a fabric, both waterproof or hydrophobic areas and hydrophilic areas can be taken into account.

[0049] Hereinafter, a preferred embodiment of the clothing fabric of the present invention will be described using the accompanying drawings. In the following drawings, the same reference numerals represent the same components. Figure 1 Schematic diagram showing the mechanism of heat absorption and heat dissipation of fabric according to one embodiment of the present invention. Heat (infrared rays) 2 from the body 1 is rapidly and massively absorbed by the fabric 3, promoting the heat dissipation 4 of the body and improving the cooling effect. In addition, the heat (infrared rays) is used to promote the evaporation of water on the fabric, so that the fabric dries quickly. Since the fabric 3 is subjected to a water absorption and quick-drying treatment, the cooling effect brought about by the latent heat of evaporation of water is synergistically enhanced.

[0050] In contrast, Figure 2 In the conventional fabric 6 shown, the amount of transfer of heat (infrared rays) 5 from the body 1 is lower than that of the fabric 3 of the present invention, and the amount of heat dissipated from the body 7 is also lower.

[0051] Figure 3 This is a schematic cross-sectional explanatory diagram of a water-absorbent quick-drying fiber 10 showing a state in which a hydrophilic polyester resin processing agent is absorbed in a polyester fiber according to an embodiment of the present invention. At least a portion 12a of the polyester group of the hydrophilic polyester resin processing agent molecule 12 is absorbed into the amorphous portion inside the polyester fiber 11, and the hydrophilic group 12b covers the surface of the polyester fiber 1. Thus, highly durable antifouling properties, water absorption properties, and diffusibility are obtained.

[0052] Example

[0053] The following examples are used to further illustrate the present invention. In addition, the present invention should not be construed as being limited to the following examples.

[0054] The evaluation method is as follows.

[0055] <Mass per unit area (weight per unit area)>

[0056] The measurement was conducted in accordance with JIS L1096:2010A method.

[0057] <Breathability>

[0058] The air permeability of fabrics is measured according to JIS L1096:2010 (Frazier method).

[0059] <Light transmittance, light reflectance, light absorptivity>

[0060] Using a spectrophotometer (UV-3100PC manufactured by Shimadzu Corporation) and an integrating sphere attachment, set the fabric sample and irradiate light with a wavelength of 280 to 2600 nm. The light transmitted through the fabric sample is collected by the integrating sphere, and the value obtained by dividing the measured value by the value of the irradiated light and multiplying it by 100 is the light transmittance. The light diffusely reflected by the surface of the fabric sample is collected by the integrating sphere, and the value obtained by dividing the measured value by the value of the irradiated light and multiplying it by 100 is the light reflectance.

[0061] The transmittance and reflectance of the fabric are measured when the fabric is irradiated with light of wavelength 280-2600nm. The light absorption rate of the fabric is calculated as follows.

[0062] Light absorption rate of fabric = 100% - transmittance - reflectivity

[0063] <Water evaporation amount>

[0064] Determine the amount of water evaporation caused by infrared irradiation. Wet a 10×10cm fabric with 1.5ml (1.5g) of water, irradiate the fabric with infrared light from 150mm above the fabric with a 100,000 lux reflector lamp, and measure the evaporation amount based on the weight change after 10 minutes.

[0065] <Water Absorption>

[0066] The water absorption time was measured by a dropping method (JIS L1907:2004).

[0067] <Diffusibility>

[0068] The content of water in the water content is measured by diffusible residual water content test (ISO 17617:2014A-1 method is applied by analogy (add 0.6 mL of water dropwise)).

[0069] <Evaluation of anti-transmission properties>

[0070] Evaluation of visible light barrier properties in dry state

[0071] According to JIS L1923:2017 “Evaluation method for barrier properties of textile products”, a comparative evaluation of visible light barrier properties was performed using a visual method.

[0072] Evaluation of infrared radiation barrier properties in dry state

[0073] In the same manner as described above, comparative evaluation of infrared penetration resistance was performed by visually observing images of fabric samples using an infrared camera (trade name: PENTAX645Z IR, manufacturer: Ricoh Imaging Co., Ltd.).

[0074] Visible light barrier evaluation in wet state

[0075] 0.4 ml of water was dripped into the center of a fabric sample with a length of 10 cm in the vertical direction and 10 cm in the horizontal direction, and the sample was placed on a hot plate (40°C) of KES-F7 Thermolab manufactured by KATOTECH Co., Ltd. for 10 minutes. The sample was then removed and a comparative evaluation of visible light penetration resistance was performed using a visual method in accordance with JIS L1923:2017 "Method for evaluating penetration resistance of fiber products". The transparency of the center of the fabric sample with water dripped was determined.

[0076] Evaluation of infrared radiation barrier properties in wet state

[0077] 0.4 ml of water was dripped into the center of the fabric sample with a length of 10 cm in the vertical direction and 10 cm in the horizontal direction, and the sample was placed on a hot plate (40°C) of KES-F7 Thermolab manufactured by KATOTECH Co., Ltd. for 10 minutes. Then the fabric sample was removed and the infrared barrier properties were compared and evaluated by visual method using an infrared camera (trade name: PENTAX645Z IR, manufacturer: Ricoh Imaging Co., Ltd.) when observing the fabric sample according to JIS L1923:2017 "Method for evaluating the barrier properties of fiber products". The transparency of the center of the fabric sample with water dripped was determined.

[0078] <Evaluation of endothermic evaporation properties>

[0079] 0.2 ml of water was dripped into the center of a fabric sample with a length of 10 cm and a width of 10 cm, and the sample was placed on a hot plate (40°C) of KES-F7 Thermolab manufactured by KATOTECH Co., Ltd. The surface temperature of the fabric sample was measured using a thermal imager. In the thermal image, the temperature of the area where water is present is displayed as lower. In the thermal image, the time required for the surface temperature of the fabric sample to become uniform was measured (hereinafter referred to as the evaporation time). The uniform temperature of the surface of the fabric sample indicates that there is no moisture remaining on the surface of the fabric. Figure 4AD is a thermal imaging image of the endothermic evaporation evaluation test. This thermal imaging image is an example of a fabric sample 14 with 0.2 ml of water 15 dripped onto the center of the fabric sample 14 and the fabric sample 14 placed on a hot plate 13. Figure 4 A represents the image after 1 minute. Figure 4 B represents the image after 5 minutes. Figure 4 C represents the image after 7 minutes. Figure 4 D is an image after 11 minutes. After 11 minutes, the water is completely evaporated. The time required to reach the state of complete evaporation of the water is measured.

[0080] (Example 1)

[0081] 1. Use Yarn

[0082] (1) Polyester fiber A: Polyester (PET) multifilament yarn (total fineness 84 decitex, number of filaments 48), false twist yarn, added with 4 wt% of cesium tungsten oxide particles (manufactured by Sumitomo Metal Mining Co., Ltd., trade name "CWO") and 0.1 wt% of titanium oxide particles (commercially available fiber-grade product)

[0083] (2) Polyester fiber B: Polyester (PET) multifilament yarn (total fineness 84 decitex, number of filaments 48), false twist yarn, added with 0.1 wt% titanium oxide particles (commercially available fiber grade product)

[0084] 2 Knitted fabrics

[0085] The knitted fabric (woven fabric) was knitted using a circular knitting machine with a machine gauge of 24. The yarn of polyester fiber A was set to 45% by mass, the yarn of polyester fiber B was set to 55% by mass, and the number of stitches was 45 / inch in the horizontal direction and 51 / inch in the vertical direction. The surface photograph of the obtained knitted fabric is shown in FIG. Figure 5 A, the back photo is as follows Figure 5 As shown in B.

[0086] 3. Water-absorbing and quick-drying treatment

[0087] (1) Use of drugs

[0088] As the hydrophilic polyester resin, 5% owf (on the weight of fiber) of product number KMZ-902 manufactured by Takamatsu Oil & Fats Co., Ltd. was used.

[0089] (2) Processing conditions

[0090] The knitted fabric was immersed in an aqueous solution to which the above-mentioned agent and 5% owf disperse dye (saxe blue) were added, and the temperature was raised from room temperature to 130°C at a rate of 2°C / min, and the knitted fabric was treated at 130°C for 60 minutes, cooled, washed, dried, stretched and heat-set. The mass per unit area (unit area weight) of the knitted fabric obtained was 120 g / m 2 .

[0091] (Example 2)

[0092] The same procedure as in Example 1 was carried out except that the disperse dye was replaced with white 5% owf and the light gray blue was replaced.

[0093] (Example 3)

[0094] 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 white 5% owf.

[0095] (Example 4)

[0096] The same procedure as in Example 1 was carried out except that the yarn of polyester fiber A was 20% by mass, the yarn of polyester fiber B was 80% by mass, and the disperse dye was white 5% owf.

[0097] (Example 5)

[0098] The same procedure as in Example 1 was carried out 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 white 5% owf.

[0099] (Example 6)

[0100] The yarn content of polyester fiber A was set to 20% by mass, the yarn content of polyester fiber B was set to 80% by mass, and the weight per unit area was set to 150 g / m 2 The same method as in Example 1 was used except that the number of stitches was set to 37 stitches / inch in the horizontal direction and 33 stitches / inch in the vertical direction, and the disperse dye was set to white 5% owf. The surface photograph of the obtained knitted fabric is shown in FIG. Figure 6 A, the back photo is as follows Figure 6 As shown in B.

[0101] (Comparative Example 1)

[0102] The same procedure as in Example 1 was carried out except that 100% of the polyester fiber B was used.

[0103] (Comparative Example 2)

[0104] The same procedure as in Example 1 was carried out except that 100% of the polyester fiber B was used and the disperse dye was changed to white 5% owf.

[0105] (Comparative Example 3)

[0106] The same procedures as in Example 1 were carried out except that 100% by mass of the polyester fiber B yarn was used, the disperse dye was set to white 5% owf, and no water absorbing agent was used.

[0107] (Comparative Example 4)

[0108] The same procedure as in Example 1 was carried out except that the yarn of polyester fiber A was 20% by mass, the yarn of polyester fiber B was 80% by mass, no water-absorbing agent processing was performed, and the disperse dye was white 5% owf.

[0109] (Comparative Example 5)

[0110] The same procedure as in Example 6 was carried out except that 100% by mass of the polyester fiber B was used.

[0111] The above conditions and results are summarized in Tables 1 to 6 below. Figure 7 A graph showing the light transmittance of Examples 1 and 2 and Comparative Examples 1 and 2, Figure 8 A graph showing the light reflectance of Examples 1 and 2 and Comparative Examples 1 and 2.

[0112] Table 1

[0113]

[0114] From Table 1, it can be confirmed that the time for the diffusible residual moisture content to reach 10% is shorter in Examples 1 to 2 than in Comparative Examples 1 to 2, and that the quick-drying property is higher in Example 6 than in Comparative Example 5. In addition, it can be confirmed that the time for the water absorption and diffusible residual moisture content to reach 10% is shorter in Examples 3 to 5 than in Comparative Examples 3 to 4, and that the water absorption and quick-drying property is higher.

[0115] Table 2

[0116] Table 3

[0117]

[0118] Table 4

[0119]

[0120] As shown in Tables 2 to 4, the average absorption rates in the ultraviolet region, visible region, and infrared region are higher in Example 1 than in Comparative Example 1, in Example 2 than in Comparative Example 2, in Examples 3 to 5 than in Comparative Examples 3 to 4, and in Example 6 than in Comparative Example 5. In particular, the average absorption rate in the infrared region is high, so it is easy to absorb infrared rays emitted from the body, and it is easy to absorb heat. Through this heat, water can be changed from liquid phase to gas phase, which has the effect of promoting drying.

[0121] Table 5

[0122] Color tone Water evaporation (g) Example 1 Light gray blue 0.717 Example 2 White 0.643 Comparative Example 1 Light gray blue 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

[0123] As shown in Table 5, the water evaporation amount is higher in Example 1 than in Comparative Example 1, in Example 2 than in Comparative Example 2, in Examples 3 to 5 than in Comparative Examples 3 to 4, and in Example 6 than in Comparative Example 5. Therefore, it can be confirmed that the energy of absorbed infrared rays promotes vaporization and has a good water absorption and quick drying effect.

[0124] (Comparative Example 6)

[0125] As the polyester fiber C, the same procedure as in Example 1 was carried out except that 100% of the yarn was used: polyester (PET) multifilament yarn (total fineness 84 decitex, number of filaments 48), false twist yarn, and fiber to which titanium oxide particles were not added (commercially available fiber-grade product).

[0126] (Comparative Example 7)

[0127] As polyester fiber C, the same procedure as in Example 1 was performed except that 100% of polyester (PET) multifilament yarn (total fineness 84 decitex, number of filaments 48), false twisted yarn, and fiber yarn to which titanium oxide particles were not added (commercially available fiber-grade product) was used, and the disperse dye was set to white 5% owf.

[0128] (Comparative Example 8)

[0129] As the polyester fiber C, the same procedure as in Example 6 was carried out except that 100% by mass of polyester (PET) multifilament yarn (total fineness 84 decitex, number of filaments 48), false twisted yarn, and yarn of fiber to which titanium oxide particles were not added (commercially available fiber-grade product) were used.

[0130] (1) When the barrier properties were evaluated in a dry state, the following results were obtained.

[0131] Visible light barrier evaluation

[0132] Example 1 and Comparative Example 6 were evaluated. As a result, Example 1 was improved by 0.5 level in the visual method compared with Comparative Example 6.

[0133] Example 2 and Comparative Example 7 were evaluated. As a result, Example 2 was improved by 1.0 level in the visual method compared with Comparative Example 7.

[0134] Example 6 and Comparative Example 8 were evaluated. As a result, Example 6 was improved by 0.5 level in the visual method compared with Comparative Example 8.

[0135] Evaluation of infrared radiation barrier properties

[0136] Example 1 and Comparative Example 6 were evaluated. As a result, Example 1 was improved by 1.0 level in the visual method compared with Comparative Example 6.

[0137] Example 2 and Comparative Example 7 were evaluated. As a result, Example 2 was improved by 1.0 level in the visual method compared with Comparative Example 7.

[0138] Example 6 and Comparative Example 8 were evaluated. As a result, Example 6 was improved by 0.5 level in the visual method compared with Comparative Example 8.

[0139] (2) When the barrier properties were evaluated in a wet state, the following results were obtained.

[0140] Visible light barrier evaluation

[0141] Example 1 and Comparative Example 6 were evaluated. As a result, Example 1 was improved by 1.0 level in the visual method compared with Comparative Example 6.

[0142] Example 2 and Comparative Example 7 were evaluated. As a result, Example 2 was improved by 1.5 levels in the visual method compared with Comparative Example 7.

[0143] Example 6 and Comparative Example 8 were evaluated. As a result, Example 6 was improved by 0.5 level in the visual method compared with Comparative Example 8.

[0144] Evaluation of infrared radiation barrier properties

[0145] Example 1 and Comparative Example 6 were evaluated. As a result, Example 1 was improved by 1.5 levels in the visual method compared with Comparative Example 6.

[0146] Example 2 and Comparative Example 7 were evaluated. As a result, Example 1 was improved by 1.5 levels in the visual method compared with Comparative Example 6.

[0147] Example 6 and Comparative Example 8 were evaluated. As a result, Example 1 was improved by 0.5 level in the visual method compared with Comparative Example 6.

[0148] (3) The evaluation of endothermic evaporation is shown in Table 6.

[0149] Table 6

[0150] Color tone Evaporation time (minutes) Example 1 Light gray blue 5 Example 2 White 6 Comparative Example 1 Light gray blue 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

[0151] As can be seen from Table 6, the evaporation time of Example 1 is faster than that of Comparative Example 1, Example 2 is faster than that of Comparative Example 2, Examples 3 to 5 are faster than that of Comparative Examples 3 to 4, and Example 6 is faster than that of Comparative Example 5. Therefore, it can be confirmed that the energy of the absorbed infrared rays promotes vaporization and improves the evaporability.

[0152] Next, 20 healthy male subjects were asked to run while wearing short-sleeved shirts made of the fabrics of Example 2 and Comparative Example 2. The subjective opinions during the wearing were numerically expressed (5: good, 4: slightly good, 3: normal, 2: slightly bad, 1: bad), and the average value of the 20 subjects was displayed for each item.

[0153] Table 7

[0154] Drying sweat from clothes Stickiness caused by sweat on clothes Cleanliness of clothes Body transparency Example 2 4.3 4.1 4.1 3.3 Comparative Example 2 3.1 3.2 3.1 204

[0155] As can be seen from Table 7, the short-sleeved shirt of Example 2 dries sweat on the clothes faster than the short-sleeved shirt of Comparative Example 2, has low stickiness caused by sweat on the clothes, high cleanliness of the clothes, low transparency to the body, and a good overall wearing feel.

[0156] As described above, the water absorption of the fabrics of each embodiment is less than 10 seconds, and the time for the diffusion to reach 10% is within 55 minutes, which are all qualified, and the hand feel is also good and soft. In addition, it can be confirmed that the fabric actively absorbs infrared rays and promotes release, and at the same time uses the absorbed heat to promote the evaporation of moisture on the fabric, keeping it dry, thereby improving thermal comfort and mobility. In addition, by controlling ultraviolet rays, visible light, and infrared rays, it is confirmed that there is no transparency and it is also suitable for wearing. In addition, by using the fabric containing heat-absorbing and heat-dissipating polyester fiber A and polyester fiber B, the heat-absorbing and heat-dissipating properties of the fabric that actively absorbs heat emitted from the body and promotes release are exerted; the heat (infrared rays) from the body is quickly and massively absorbed by the fabric, promoting the heat dissipation of the body and improving the cooling effect; the heat (infrared rays) is used to promote the evaporation of moisture on the fabric, so that the fabric quickly dries; the fabric has been treated with water absorption and quick drying, so the cooling effect brought by the latent heat of water evaporation is synergistically improved; the fabric has high heat dissipation and water absorption and quick drying properties, so it can also be confirmed that it is particularly suitable as a fabric for sportswear.

[0157] Industrial applicability

[0158] The fabric of the present invention is suitable for underwear such as sports shirts, T-shirts, underwear, underpants, tights, common shirts, underpants, and is also suitable for middle clothes and outer clothes. In addition, due to the good cooling effect, it is also effective for cool business clothes.

[0159] Explanation of symbols

[0160] 1 Body

[0161] 2,5 Heat (infrared)

[0162] 3,6 Fabric

[0163] 4,7 Heat Dissipation

[0164] 10. Heat-absorbing quick-drying fiber

[0165] 11. Polyester

[0166] 12 Hydrophilic polyester resin processing agent molecules

[0167] 12a At least a portion of a polyester group

[0168] 12b Hydrophilic group

[0169] 13 Hot Plate

[0170] 14 Fabric samples

[0171] 15 Water

Claims

1. A fabric for clothing, characterized in that: It is a clothing fabric containing polyester fiber. The fabric contains heat-absorbing and heat-dissipating polyester fiber A and polyester fiber B. The heat-absorbing and heat-dissipating polyester fiber A contains cesium tungsten oxide particles and titanium oxide particles, and the polyester fiber B does not contain cesium tungsten oxide particles. The fabric is treated with water absorption and quick drying.

2. The fabric for clothing according to claim 1, wherein: Through the water absorption and quick-drying treatment, at least a portion of the hydrophilic polyester resin processing agent molecules in at least a portion of the polyester fibers A and B are absorbed into the fibers, and the remaining portion covers the surface of the polyester fibers to be hydrophilized.

3. The fabric for clothing according to claim 1 or 2, wherein: The weight ratio of the polyester fiber A to the polyester fiber B is A:B=10-90:90-10.

4. The fabric for clothing according to any one of claims 1 to 3, wherein When the polyester fiber A is assumed to be 100% by weight, the polyester fiber A contains 0.1 to 10% by weight of cesium tungsten oxide particles and 0.1 to 2% by weight of titanium oxide particles.

5. The fabric for clothing according to any one of claims 1 to 4, wherein The polyester fiber B not containing cesium tungsten oxide particles does not contain titanium oxide particles, or contains titanium oxide particles in an amount exceeding 0% by weight and not more than 5% by weight, based on 100% by weight of the polyester fiber B.

6. The fabric for clothing according to any one of claims 1 to 5, wherein The air permeability of the fabric is determined according to JIS L1096:2010, i.e. the Frazier method, to be 100 cc / m 2 ·More than seconds.

7. The fabric for clothing according to any one of claims 1 to 6, wherein The water absorption of the fabric is measured according to JIS L1907:2004, that is, the water absorption time is less than 10 seconds.

8. The fabric for clothing according to any one of claims 1 to 3, wherein The moisture diffusivity of the fabric reaches 10% within 55 minutes under the conditions of a diffusive residual moisture rate test, i.e., ISO 17617:2014A-1 method, with 0.6 mL of water added dropwise.

9. The fabric for clothing according to any one of claims 1 to 8, wherein The fabric is a knitted fabric.

10. The fabric for clothing according to any one of claims 1 to 9, wherein The fabric is a sportswear fabric.

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