Cooling fabrics and personal items

Abstract

To provide cooling fabrics and personal accessories that offer excellent cooling sensation upon contact and washability. [Solution] The cooling fabric 1 according to the present invention comprises a fabric 10 and a cooling layer 11. The fabric 10 includes any of cotton cloth, fiber cloth, or nonwoven fabric, and the cooling layer 11 is constructed by applying and fixing a finishing agent 11c, which contains microcapsules 11b containing a PCM phase change material in a core portion 11a, at a concentration of 30% to 99% by weight relative to the total finishing agent, to the surface of the fabric (in this case, cotton cloth yarn). The cooling fabric 1 according to the present invention has a contact cooling Qmax value of 0.3 or more and an enthalpy value of 80 J / g or more. Personal items according to the present invention are manufactured using the cooling fabric and include any of clothing, bedding, or indoor covers.

Description

Technical Field

[0001] The present invention relates to a cold-sensing fabric and daily necessities.

Background Art

[0002] In recent years, fabrics and clothes that can obtain a contact cold-sensing effect by providing a phase change material (PCM, phase-change material) to yarns or fibers have emerged.

[0003] For example, Utility Model Registration No. 3245303 (Patent Document 1) discloses a sustained cold-sensing temperature-adjusting yarn. Here, the sustained cold-sensing temperature-adjusting yarn includes a fiber having an outer skin portion and a core portion, the outer skin portion encloses the outside of the core portion, the core portion is made of a PCM raw material, and the percentage of the cross-sectional area of the PCM occupies 5 to 70% of the cross-sectional area of the fiber. This enables more PCM to be injected into the yarn, making the cold-sensing stronger and enhancing the use effect of the product.

[0004] Also, Utility Model Registration No. 3242695 (Patent Document 2) discloses a fabric having a sustained cold-sensing property. Here, the fabric having a sustained cold-sensing property includes a fiber base material layer (1) and a sustained cold-sensing layer (2), and a sustained cold-sensing layer (2) containing a phase transition material (3), an emulsifier, a binder, a cross-linking agent, a penetrant, and an antifoaming agent is directly attached to one side or both sides of the fiber base material layer (1) by padding, coating, or printing. This ensures the sustained cold-sensing property of the fabric, improves the comfort during use, and the phase transition material according to the present invention also has antibacterial performance, can reduce bacterial propagation, and can maintain cleanliness and health.

[0005] Furthermore, Japanese Patent Publication No. 2025-181467 (Patent Document 3) discloses lyocell fibers. In this lyocell fiber, cellulose, microcapsules having a coacell structure, and an amide compound are included, and the microcapsules are crosslinked with the cellulose and the amide compound. The core of the microcapsule contains a phase change material and a nanonucleating agent, and the cells of the microcapsule contain a melamine-modified urea-formaldehyde resin prepolymer and nano zinc oxide particles. This allows the temperature control function to be maintained for a long period of time and enables the absorption of formalin.

[0006] Furthermore, Utility Model Registration No. 3253902 (Patent Document 4) discloses a fiber having a temperature control function. Here, the fiber having a temperature control function includes a sheath layer and a core layer, with the sheath layer covering the outside of the core layer. The sheath layer includes a PA6 layer, PET layer, PP layer, POE layer, modified acrylic layer, or polyethylene layer, and the core layer includes one of the following, or any combination, a polyethylene core material, a phase change core material, or a far-infrared core material. This is said to effectively regulate the surface temperature of the fabric, allowing the fabric to adapt better to drastic fluctuations in the external environment, creating a comfortable temperature environment and increasing the perceived comfort level of the human body in relation to temperature.

[0007] Furthermore, Utility Model Registration No. 3253968 (Patent Document 5) discloses fibers using microcapsule technology. Here, fibers using microcapsule technology include mixed phase-change microcapsules, functional microcapsules, and a base material. The phase-change microcapsules include a phase-change core material and a phase-change wall material coated on the phase-change core material, and the phase-change core material includes one of organic PCM materials, inorganic PCM materials, or bio-based PCM materials, or any combination thereof. The functional microcapsules also include a functional core material and a functional wall material coated on the functional core material, and the functional core material includes one of any of anti-mite agents, anti-fungal agents, antibacterial and antimicrobial agents, or any combination thereof. This makes it possible to meet the usage needs in various environments, satisfy the user's demand for diversity in textile functions, and improve practicality. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Utility Model Registration No. 3245303 Gazette [Patent Document 2] Utility Model Registration No. 3242695 Gazette [Patent Document 3] Japanese Patent Publication No. 2025-181467 [Patent Document 4] Utility Model Registration No. 3253902 Gazette [Patent Document 5] Utility Model Registration No. 3253968 Gazette [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] As mentioned above, cooling fabrics and clothing using phase change materials have appeared, but these structures have the drawback that the phase change material is placed inside the yarn or fiber, so the phase change material does not come into direct contact with the skin, resulting in a weak cooling effect.

[0010] For example, conventional cooling fabrics with phase change agents embedded within the yarn have the problem that the cooling effect disappears when the fabric temperature reaches 21 to 22 degrees Celsius, or within 1 to 2 seconds of contact with the skin. Furthermore, conventional cooling fabrics do not contain the phase change agent in microcapsules, which leads to deterioration, hardening, and a tendency to turn yellow.

[0011] Here, the technology described in Patent Document 1 above has the problem that the cooling effect is low because the core portion including the PCM and the skin come into contact through the outer layer, and the thermal conductivity of the outer layer has an influence. Furthermore, the technology described in Patent Document 2 above has the problem that although the development of sustained cooling is excellent, the instantaneous cooling sensation immediately after the start of use is not sufficient. Furthermore, the technology described in Patent Document 3 above has the problem that the performance changes greatly even with slight changes in materials, formulations, and conditions, so it is not forgiving. Furthermore, the technology described in Patent Document 4 above has the problem that it is difficult to process because the core-sheath structure fiber itself requires advanced manufacturing technology. Furthermore, the technology described in Patent Document 5 above focuses on the sustainability of the temperature control function, but does not adequately consider the instantaneous cooling sensation immediately after the start of use, and there are limitations to the degree of freedom in flexibly designing the cooling characteristics according to the application, and there is room for improvement in terms of manufacturing cost and quality stability due to the complexity of the structure.

[0012] Therefore, this invention was made to solve the aforementioned problems, and aims to provide a cooling fabric and personal accessories that are excellent in terms of contact cooling effect and washability. [Means for solving the problem]

[0013] The cooling fabric according to this invention comprises a fabric and a cooling layer. The fabric includes any of cotton cloth, fiber cloth, or nonwoven fabric, and the cooling layer is formed by applying and fixing a finishing agent to the surface of the fabric, which contains microcapsules with a PCM phase change material in the core portion at a concentration of 30% to 99% by weight relative to the total finishing agent. The cooling fabric according to this invention has a contact cooling Qmax value of 0.3 or higher and an enthalpy value of 80 J / g or higher.

[0014] Furthermore, personal items related to this invention are manufactured using cooling fabric and include clothing, bedding, or indoor covers. [Effects of the Invention]

[0015] According to this invention, the cooling effect upon contact and washability are excellent. [Brief explanation of the drawing]

[0016] [Figure 1] This is a conceptual diagram showing an example of a cooling fabric according to the present invention, in which a cooling layer is provided in the yarn of a cotton cloth. [Figure 2] This is a conceptual diagram showing an example of a cooling fabric according to the present invention, in which a cooling layer is provided on a fibrous fabric. [Figure 3] This is a conceptual diagram showing an example of clothing among the personal items related to this invention. [Figure 4] This is a conceptual diagram showing an example of bedding and indoor covers among the personal items related to this invention. [Figure 5] Figure 5A shows a photograph (Figure 5A) illustrating an example of Reference Example 1 and Example 2 of personal belongings according to the present invention, Figure 5B shows a thermographic photograph (Figure 5B) illustrating an example of Reference Example 1 and Example 2 taken with a thermographic camera, and Figure 5C shows a thermographic photograph (Figure 5C) illustrating an example of Example 2 when wet. [Figure 6] Figure 6A shows a thermographic image of an example where a user wears Reference Example 1, Figure 6B shows a thermographic image of an example where a user wears Example 2, and Figure 6C shows a thermographic image of an example where a user wears a wet Example 2. [Figure 7] A thermographic photograph (Fig. 7A) showing an example of different users wearing the reference example 2, a thermographic photograph (Fig. 7B) showing an example of different users wearing the example 2, and a thermographic photograph (Fig. 7C) showing an example of different users wearing the wetted example 2.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, referring to the accompanying drawings, embodiments of the present invention will be described to facilitate understanding of the present invention. Note that the following embodiments are examples that embody the present invention and do not limit the technical scope of the present invention.

[0018] As shown in Fig. 1, the cool feeling fabric 1 according to the present invention includes a fabric 10 and a cool feeling layer 11. Here, the fabric 10 includes any one of cotton fabric, fiber fabric, and non-woven fabric. In Fig. 1, for example, the yarn of cotton fabric is shown.

[0019] Furthermore, the cool feeling layer 11 is formed by applying and fixing a finishing agent 11c containing microcapsules 11b containing a phase change material of PCM in a core portion 11a at a concentration of 30% to 99% by weight with respect to the total finishing agent 11c on the surface of the fabric (here, the yarn of cotton fabric).

[0020] Here, the phase change material of PCM is, for example, a material that causes a phase change from solid to liquid or from liquid to solid within a temperature range of 10 degrees to 30 degrees of the contact object, and absorbs latent heat from the contact object or releases latent heat to the contact object in response to the phase change.

[0021] Furthermore, the microcapsule 11b has a shell portion 11b1 that surrounds the core portion 11a. In this invention, the core portion 11a is filled with a PCM phase change material and then enclosed by the shell portion 11b1. There are no particular limitations on the size of the microcapsule 11b, but for example, the radius is preferably in the range of 0.1 μm to 100.0 μm, more preferably in the range of 0.1 μm to 80.0 μm, and even more preferably in the range of 0.1 μm to 50.0 μm.

[0022] In this invention, as shown in Figure 1, the cooling fabric 1 is formed by applying a finishing agent 11c containing microcapsules 11b to cotton fabric yarn 10, drying the finishing agent 11c using a predetermined drying means, and fixing the finishing agent 11c to the surface of the cotton fabric yarn 10, thereby forming a cooling layer 11. The cooling layer 11 is a fixed layer with microcapsules 11b dispersed inside, and the main component of the finishing agent 11c solidifies around the microcapsules 11b.

[0023] Furthermore, the cooling fabric 1 according to the present invention has a contact cooling Qmax value of 0.3 or higher and an enthalpy value of 80 J / g or higher.

[0024] Here, the contact cooling Qmax value refers to the maximum heat flux that moves from the skin to the cooling fabric 1 per unit area and unit time at the moment the skin touches the cooling fabric 1. The contact cooling Qmax value is generally around 0.1 to 0.2, but if the contact cooling Qmax value is 0.3 or higher, the user will feel a strong cooling effect when their skin touches the cooling fabric 1.

[0025] Furthermore, enthalpy value refers to the amount of thermal energy that the cooling fabric 1 can absorb and release per unit weight. Generally, the enthalpy value is around 20 J / g to 60 J / g, but if the enthalpy value is 80 J / g or higher, the cooling fabric 1 will release a large amount of heat when it comes into contact with the skin, allowing the user to feel a strong cooling effect.

[0026] This provides the remarkable effect of excellent contact cooling and washability. Specifically, in this invention, microcapsules 11b containing a PCM phase change material in the core portion 11a are incorporated into the finishing agent 11c at a predetermined concentration. Here, the finishing agent 11c is generally a material that provides wrinkle resistance, flexibility, water repellency, antistatic properties, and texture adjustment (firmness, body, and smoothness). The finishing agent 11c is a material whose components solidify on the yarn and fibers, making it difficult to wash off and providing long-lasting effects. In this invention, by utilizing the characteristics of such a finishing agent 11c and incorporating microcapsules 11b into the finishing agent 11c and fixing them to the surface of the fabric 10, the microcapsules 11b come into direct contact with the user's skin, providing a high contact cooling effect.

[0027] Furthermore, this invention has a high contact cooling effect, allowing it to maintain a distinct cooling sensation even at, for example, 28 degrees Celsius. In addition, because the phase change response of the cooling fabric 1 is fast, the user can feel the coolness the moment they touch the cooling fabric 1. Moreover, the cooling fabric 1 has a high enthalpy value (heat storage capacity), which significantly extends the cooling time for which the user feels the coolness. Furthermore, because the microcapsules 11b are immobilized on the finishing agent 11c in this invention, the fabric 10 maintains a soft feel, is resistant to yellowing, and can maintain the original texture of the fabric 10. In addition to its cooling performance, this invention also has excellent moisture absorption and breathability, preventing stuffiness and providing a comfortable wearing experience when applied to clothing.

[0028] Furthermore, in this invention, the microcapsules 11b are fixed to the fabric 10 via the finishing agent 11c. As described above, the finishing agent 11c is a substance whose components are fixed to the fabric 10 and do not easily wash off. Therefore, in this invention, the cooling layer 11 containing the microcapsules 11b does not come off even after many washes, and high washability can be obtained.

[0029] Here, although cotton yarn was used as an example of fabric 10 in the description above, it is not limited to this, and for example, as shown in Figure 2, cotton cloth can be used as fabric 10. Cotton cloth 10 can be formed, for example, by crossing warp threads 10a and weft threads 10b. In this case, the finishing agent 11c containing microcapsules 11b is impregnated into the cotton cloth 10, the finishing agent 11c is dried by a predetermined drying means, and the finishing agent 11c is fixed to the surface of the cotton cloth 10 to form the cooling layer 11.

[0030] Here, the fabric 10 is not particularly limited as long as it is one of cotton fabric, fiber fabric, or nonwoven fabric. For example, cotton fabric is a woven or knitted fabric made of cotton fibers, fiber fabric is a woven or knitted fabric made of fibers, and nonwoven fabric is a cloth-like material in which fibers are bonded together. Examples of cotton fabric include natural cotton fibers, single yarn, double yarn, spun yarn, plain weave, twill weave, satin weave, jersey knit, rib knit, etc. Examples of fiber fabric include plant fiber fabric, linen fabric, animal fiber fabric, wool fabric, silk fabric, cashmere fabric, chemical fiber fabric, regenerated fiber fabric, rayon fabric, cupro fabric, regenerated cellulose fiber fabric, semi-synthetic fiber fabric, acetate fabric, triacetate fabric, synthetic fiber fabric, polyester fabric, nylon (polyamide) fabric, acrylic fabric, polypropylene fabric, polyurethane (spandex) fabric, etc. Furthermore, examples of nonwoven fabrics include needle-punched nonwoven fabrics, water-jet (spunlace) nonwoven fabrics, binder-bonded nonwoven fabrics, spunbond nonwoven fabrics, melt-blown nonwoven fabrics, and thermal-bonded nonwoven fabrics.

[0031] Also, the thickness of the fabric (gsm = g / m²) 2 There are no particular limitations on the gsm, but for example, it is preferable that it be in the range of 10 gsm to 100 gsm, more preferably in the range of 20 gsm to 80 gsm, and even more preferably in the range of 20 gsm to 60 gsm. Note that gsm refers to weight per unit area, and the higher the gsm, the thicker the fabric 10 will be and the firmer the structure will be.

[0032] Furthermore, there are no particular limitations on the material of the phase change agent for PCM, but for example, organic PCM materials, inorganic PCM materials, bio-based PCM materials, etc., can be used. Here, organic PCM materials include paraffin, fatty acids, polyols, etc. Inorganic PCM materials include crystalline hydrated salts, molten salts, metal alloys, etc. Furthermore, bio-based PCM materials include natural fatty acids, biomass derivatives, plant waxes, etc.

[0033] Furthermore, there are no particular limitations on the types of microcapsules 11b, but examples include organic polymers such as polyurethane, polyurea, polymethyl methacrylate (PMMA), polyamide, polyester, melamine resin, urea resin, and phenolic resin; inorganic polymers such as silica, alumina, titania, and calcium compounds; organic-inorganic composite materials; and hybrid materials such as silica-polymer composites.

[0034] Furthermore, there are no particular limitations on the method for encapsulating the PCM phase change material in the core portion 11a of the microcapsule 11b, but examples include interfacial polymerization, in situ polymerization, phase separation, emulsion polymerization, spray drying, impregnation, or a combination thereof. Also, the microcapsule 11b may have a single particle size or different particle sizes.

[0035] Furthermore, the concentration of microcapsules 11b relative to the total finishing agent 11c is preferably in the range of 30% to 99% by weight, more preferably in the range of 40% to 90% by weight, and even more preferably in the range of 50% to 80% by weight.

[0036] Furthermore, there are no particular limitations on the type of finishing agent 11c, but for example, softening agents, wrinkle-resistant agents, shape-retaining agents, water-repellent agents, oil-repellent agents, antistatic agents, and stain-resistant agents can be used. Here, softening agents can include, for example, cationic surfactants and silicone compounds. Wrinkle-resistant or shape-retaining agents can include, for example, crosslinked resins and DMDHEU resins. Water-repellent or oil-repellent agents can include, for example, fluorine compounds and silicone compounds. Antistatic agents can include, for example, surfactants having hydrophilic groups. Stain-resistant agents can include resins, fluorine polymers, crosslinking agents, and reactive resins. Furthermore, in addition to the above-mentioned types (components), the finishing agent 11c may also contain auxiliary components (auxiliaries) such as emulsifiers, dispersants, penetrating agents, pH adjusters, defoamers, and metal salts (catalysts). The finishing agent 11c also contains a solvent for uniformly adhering the components to the fabric 10, and the solvent can be, for example, water or an organic solvent.

[0037] Furthermore, there are no particular limitations on the method of applying the finishing agent 11c to the fabric 10. For example, immersion (padding), coating, spray application, printing, impregnation, foam application, or dip coating methods can be used. Also, if the method of applying the finishing agent 11c is printing, the printed shape can be, for example, a square, circle, rhombus, hexagon, etc. Furthermore, there are no particular limitations on the color of the finishing agent 11c, but for example, white can be used.

[0038] Furthermore, there are no particular limitations on the thickness of the cooling layer 11, but for example, it is preferably in the range of 0.1 μm to 1000 μm, more preferably in the range of 10.0 μm to 1000 μm, and even more preferably in the range of 100.0 μm to 1000 μm.

[0039] Furthermore, there are no particular limitations on the form of the cooling layer 11, but examples include a form in which it covers the surface of the fabric 10 in a continuous film-like manner, or a form in which microcapsules 11b are scattered. Also, the cooling layer 11 may be a single-layer structure or a multi-layer structure. Moreover, the microcapsules 11b of the cooling layer 11 may be uniformly arranged over the entire surface of the fabric 10, may be arranged only on the skin-contacting side, or may be arranged along the outer circumference of the yarn or fibers.

[0040] Furthermore, there are no particular limitations on the method of immobilizing (solidifying) the cooling layer 11. For example, it can be appropriately selected considering the desired cooling performance, durability, texture, and fabric characteristics. Here, the immobilization method can be carried out by, for example, drying treatment by removing moisture or solvent contained in the finishing agent 11c, crosslinking reaction by heat treatment using a crosslinking resin or reactive resin, chemical reaction using a catalyst such as a metal salt, curing treatment by ultraviolet irradiation, or a multi-stage treatment combining these. Drying treatment is used to physically fix the components in the finishing agent 11c to the fiber surface, and heat treatment is used to chemically fix the microcapsules 11b and binder components to the fiber surface. The immobilization conditions are appropriately set considering the drying temperature, drying time, heat treatment temperature, treatment time, crosslinking density, binder content, type and concentration of catalyst, etc.

[0041] Furthermore, the personal item 2 according to this invention is manufactured using the cooling fabric 1 and can be configured to include clothing, bedding, or an indoor cover.

[0042] In this context, if the personal item 2 according to the present invention is clothing, examples include T-shirts and trousers, dress shirts and pants, socks, business shirts and business trousers, as shown in Figure 3. Other examples include skirts, dresses, blouses, cut-and-sew tops, tunics, cardigans, leggings, stockings, tights, and innerwear.

[0043] Furthermore, if the personal item 2 according to this invention is bedding, examples include pillowcases, duvet covers, sheets, fitted sheets, bed pads, mattress covers, comforters, futons, blankets, towel blankets, throws, pillows, pillow pads, pillow inserts, etc., as shown in Figure 4. Furthermore, if the personal item 2 according to this invention is an indoor cover, examples include curtains, tablecloths, lace curtains, partition curtains, noren curtains, sofa covers, cushion covers, chair covers, bed covers, multi-covers, table runners, placemats, carpets, rugs, mats, wall hangings, slipper covers, light blankets, mattress liners, etc., as shown in Figure 4. [Examples]

[0044] Examples and comparative examples of the present invention will be described below in detail, but the application of the present invention is not limited to these examples.

[0045] First, based on Figures 2-3, the fabric 10 was made of cotton cloth (100% cotton), and the finishing agent 11c containing microcapsules 11b was immobilized onto the cotton cloth by printing to produce the cooling fabric 1 according to the present invention. This cooling fabric 1 was designated as Example 1.

[0046] In this study, the contact cooling Qmax value of the cooling fabric 1 of Example 1 was measured using a predetermined measuring device and was found to be greater than 0.4. Furthermore, the enthalpy value of the cooling fabric 1 of Example 1 was measured using a predetermined DSC thermal analyzer and was found to be 97 J / g. In addition, a skin patch test was performed on the cooling fabric 1 of Example 1 and no irritation or allergic reaction was observed (no sensitization). Therefore, it was found that the cooling fabric 1 of Example 1 has a high contact cooling effect.

[0047] Furthermore, after washing the cooling fabric 1 of Example 1 100 times in a designated washing machine, the contact cooling Qmax value of the cooling fabric 1 after washing was measured and, as described above, exceeded 0.4. In addition, when the enthalpy value of the cooling fabric 1 after washing was measured, it exceeded 80 J / g. Therefore, it was found that the cooling fabric 1 of Example 1 has high washability.

[0048] Next, a T-shirt (item 2) was manufactured using the cooling fabric 1 from Example 1. This T-shirt (item 2) using the cooling fabric 1 was designated as Example 2. On the other hand, a T-shirt (item 2) was prepared using plain cotton fabric (100% cotton). This T-shirt (item 2) using cotton fabric was designated as Reference Example 1.

[0049] Here, as shown in Figure 5A, when the T-shirt from Example 2 and the T-shirt from Reference Example 1 were placed side by side and their temperatures were checked with a thermographic camera, as shown in Figure 5B, the T-shirt from Reference Example 1 was displayed in bright red, indicating a high temperature. On the other hand, the T-shirt from Example 2 was displayed in yellow overall, indicating a cool temperature. Then, simulating a scenario where a user is wearing the T-shirt and sweating, a predetermined amount of water was poured onto the T-shirt from Example 2 to wet it, and its temperature was checked with a thermographic camera, as shown in Figure 5C, the T-shirt from Example 2 was displayed in blue overall, indicating that it had become significantly cooler through the water.

[0050] Next, when the user actually wore the T-shirt from Reference Example 1, their body temperature was checked using a thermographic camera. As shown in Figure 6A, with the T-shirt from Reference Example 1, the area around the shoulders was displayed in bright red, and the surface temperature was 32.2 degrees Celsius, indicating a high temperature. On the other hand, when the user actually wore the T-shirt from Example 2, their body temperature was checked using a thermographic camera. As shown in Figure 6B, with the T-shirt from Example 2, the red area around the shoulders was smaller, the area around the stomach was displayed in blue, and the surface temperature was 28.6 degrees Celsius (-3.6 degrees Celsius), indicating a cold temperature. Furthermore, when the T-shirt from Example 2 worn by the user was wet with a predetermined amount of water, and the user's body temperature was checked using a thermographic camera, as shown in Figure 6C, with the T-shirt from Example 2, the entire body was displayed in blue, and the surface temperature was 25.0 degrees Celsius (-7.2 degrees Celsius), indicating a significant cooling effect through the water.

[0051] Next, a T-shirt was prepared using a textile fabric (100% polyester fiber). This textile fabric was designated as Reference Example 2. When a different user actually wore the T-shirt of Reference Example 2, their body temperature was checked using a thermographic camera. As shown in Figure 7A, the T-shirt of Reference Example 2, similar to the T-shirt of Reference Example 1, showed a bright red area around the shoulders and a surface temperature of 33.1 degrees Celsius, indicating a high temperature. On the other hand, when a different user actually wore the T-shirt of Example 2, their body temperature was checked using a thermographic camera. As shown in Figure 7B, the T-shirt of Example 2, similar to the above, showed a smaller red area around the shoulders and a large blue area around the stomach, with a surface temperature of 30.1 degrees Celsius (-3.0 degrees Celsius), indicating a cold temperature. Furthermore, when a predetermined amount of water was poured onto the T-shirt from Example 2, worn by a different user, and the user's body temperature was checked with a thermographic camera, as shown in Figure 7C, the entire body of the T-shirt from Example 2 was displayed in blue, as described above, and the surface temperature reached 23.7 degrees (-9.4 degrees), indicating that it became significantly colder through the water.

[0052] Thus, it has been found that the cooling fabric and personal items according to this invention have excellent contact cooling effect and washability. [Industrial applicability]

[0053] As described above, the cooling fabric and personal accessories according to this invention are useful not only in the fields of clothing, household goods, and bedding, but also in various fields such as nursing care, medical care, sports and outdoor activities, industry and work, construction and living environment, vehicles and transportation, home appliances and electronic equipment, pet supplies, and education and public services, and are effective as cooling fabrics and personal accessories that have excellent contact cooling effect and washability. [Explanation of Symbols]

[0054] 1. Cooling fabric 10 Fabric 11 Cool layer 2. Personal belongings

Claims

1. Fabrics containing either cotton cloth, fiber cloth, or nonwoven fabric, A cooling layer is formed by applying and fixing a finishing agent to the surface of the fabric, which contains microcapsules with a PCM phase change material in the core portion at a concentration of 30% to 99% by weight relative to the total finishing agent, It is made of a cooling fabric, The contact cooling Qmax value is 0.3 or higher. The enthalpy value is 80 J / g or higher. Cooling fabric.

2. Personal items, including clothing, bedding, and indoor covers, manufactured using the cooling fabric described in claim 1.

Images