JP2019199674A - Wearable body cooling device - Google Patents

Abstract

To provide a body cooling device capable of imparting a sufficient cooling effect even under an extremely hot environment, especially sustaining the cooling effect, and imparting comfortable wearability for a long period of time.SOLUTION: A wearable body cooling device comprises an air fan, and a vaporization type cooling filter spaced apart from the air fan. The vaporization type cooling filter is disposed on at least one side of the air inflow side and the delivery side of the air fan, and has a vaporization amount of 15 g/hr or more at a temperature of 35°C and a relative humidity of 50%.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wearable body cooling device, and more particularly to a body cooling textile and a body cooling garment.

  2. Description of the Related Art Conventionally, various body cooling devices and body cooling clothes that can be worn for the purpose of preventing heat stroke when working in a high temperature environment have been proposed. For example, Patent Document 1 describes a cooling garment that can cool the body with heat of vaporization such as sweat by blowing air into the garment with an axial fan.

JP 2018-21266 A

  However, the cooling garment described in the above-mentioned Patent Document 1 blows the air in the use environment as it is with a fan and uses the heat of vaporization of sweat on the skin surface. However, it is difficult to obtain a sufficient cooling effect in a short time because the sweat on the skin surface dries quickly, and the heat source of vaporization disappears in a short time in a hot summer environment such as outdoors in midsummer. There is a problem.

  Therefore, the present invention can obtain a sufficient cooling effect even under extreme heat environment, etc., and particularly, the cooling effect is sustained as compared with the conventional cooling garments such as the above prior art, and the wearability is comfortable for a long time. It is an object of the present invention to provide a body cooling device that can obtain the above.

As a result of intensive studies to solve the above problems, the present inventors have completed the present invention. That is, the present invention provides the following preferred embodiments.
[1] An air fan and a vaporization type cooling filter arranged separately from the air fan, and the vaporization type cooling filter on at least one of an air inflow side and a delivery side of the air fan. Is a wearable body cooling device having a vaporization amount of 15 g / hr or more at 35 ° C. and a relative humidity of 50%.
[2] The wearable body cooling device according to [1], wherein the vaporization type cooling filter has an air permeability of 100 to 800 cm ³ / cm ² / sec.
[3] The wearable body cooling device according to [1] or [2], wherein the vaporization type cooling filter is formed of a water-absorbing porous body.
[4] The wearable body cooling device according to [3], wherein the water-absorbing porous body has a moisture content of 0.5 to 10% by mass at a temperature of 20 ° C. and a relative humidity of 65%.
[5] The wearable body cooling device according to [3] or [4], wherein the apparent density of the water-absorbent porous body is 0.08 to 0.3 g / cm ³ .
[6] The wearable body cooling device according to any one of [3] to [5], wherein the water-absorbing porous body has a birec-type water absorption amount of 30 mm or more.
[7] The wearable body cooling device according to any one of [3] to [6], wherein the water-absorbent porous body is a nonwoven fiber molded body.
[8] The above-mentioned non-woven fiber molded body is a core-sheath composite fiber molded body including a sheath part composed of a wet heat adhesive resin and a core part composed of a non-wet heat adhesive resin. [7] The wearable body cooling device according to [7].
[9] The wearable body cooling device according to [8], wherein the wet heat adhesive resin is an ethylene-vinyl alcohol copolymer resin.
[10] A textile product for body cooling comprising the body cooling device according to any one of [1] to [9].
[11] The textile product for body cooling according to [10], wherein the textile product for body cooling is clothing for body cooling.

  According to the present invention, it is possible to obtain a sufficient cooling effect even under extreme heat environment, etc., in particular, a body that can maintain a cooling effect as compared with conventional cooling clothing and can obtain comfortable wearability for a long time. A cooling device can be provided.

FIG. 1a is a diagram illustrating the configuration of the body cooling device of the present invention. FIG. 1 b is a diagram illustrating the configuration of the body cooling device of the present invention. FIG. 2 is a schematic cross-sectional view of a body cooling device that is one embodiment of the present invention. FIG. 3 is a front view showing the body cooling device of FIG. 2 from the air inflow side. FIG. 4 is a schematic rear view of a body cooling garment according to an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail. Note that the scope of the present invention is not limited to the embodiment described here, and various modifications can be made without departing from the spirit of the present invention.

  A wearable body cooling device of the present invention (hereinafter, also referred to as “the body cooling device of the present invention”) includes an air fan and a vaporization type cooling filter disposed separately from the air fan. This is an apparatus in which the evaporative cooling filter is disposed on at least one of the air inflow side and the delivery side of the air fan. In the present invention, the wearable body cooling device is used for wearing or cooling the user's body by blowing air directly on the skin of the person to be cooled or through underwear or clothing. It means a device for cooling the body. The body cooling device of the present invention includes a vaporization type cooling filter, and absorbs heat from the air passing through the vaporization type cooling filter by vaporizing water contained in the vaporization type cooling filter. Even after the sweat on the skin surface of the skin evaporates, the cooling effect can be maintained for a long time by using the heat of vaporization of water contained in the vaporization type cooling filter to maintain the cooling effect. It can be suppressed continuously. For this reason, the body cooling device of the present invention is particularly suitable for use for the purpose of preventing heat stroke in work under severe environments such as intense heat environments, for example, for use as clothing for body cooling.

Hereinafter, the configuration of a body cooling device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram simply showing the configuration of the body cooling device of the present invention. In one embodiment of the present invention, the body cooling device (1) comprises an air fan (11) and an evaporative cooling filter (21) disposed separately from the air fan (11). The evaporative cooling filter (21) includes an air inflow side (A) through which air flows around the air fan (11) in the air flow generated when the air fan (11) is driven, and air Is disposed on at least one side of the air delivery side (B) from which the air is delivered. FIG. 1A shows a configuration in which the vaporization type cooling filter is arranged on the air inflow side (A), and FIG. 1B shows a configuration in which the vaporization type cooling filter is arranged on the air delivery side (B). When the air fan (11) is driven by providing a vaporization type cooling filter (21) on at least one of the air inflow side (A) and the air delivery side (B) of the air fan (11), body cooling is performed. After flowing into the apparatus from the outside of the apparatus (1), the air sent to the opposite side of the air inflow side of the air fan (11) is vaporized by the evaporative cooling filter (21) at any point in time. It is cooled using heat. Therefore, by mounting the body cooling device (1) so that the air delivery side (B) is positioned on the user side to be cooled, the cool air (air) delivered through the vaporization type cooling filter (21). ), A continuous body cooling effect can be obtained.

  The body cooling device of the present invention includes a vaporization type cooling filter (21) that is spaced apart from the air fan (11). In the present invention, “disposed apart” means that the vaporization type cooling filter (21) and the air fan (11) are arranged in a positional relationship where they do not contact each other. In order to efficiently use the heat of vaporization caused by (21), the vaporization type cooling filter (21) is preferably disposed in the vicinity of the air fan (11), and the air fan (11), the vaporization type cooling filter (21), Are adjacent to each other.

  Since the air flow generated when the air fan (11) is driven can be easily controlled and air can be sent stably in a certain direction, the air fan (11) in the body cooling device (1) of the present invention is Usually, the main body storage member (10) having a side wall in a direction intersecting with the rotation direction of the blades of the air fan (11), for example, both ends are opened, and the air intake port (12) and the air discharge port (13 ) Having a cylindrical main body storage member (10).

  When the air fan (11) is driven, the cooling effect becomes higher as the amount of air passing through the vaporization type cooling filter (21) out of the air taken in and sent out by the body cooling device (1) increases. The evaporative cooling filter (21) is preferably disposed on a plane that intersects the direction of air flow that occurs when the air fan (11) is driven, and is taken into the body cooling device (1). At least one of the air intake port (12) and the air discharge port (13) of the main body housing member (10) constituting the body cooling device (1) so that all of the delivered air passes through the vaporization type cooling filter (21). It is more preferable that the vaporization type cooling filter (21) exists in one whole opening part.

  The body cooling device of the present invention has a vaporization amount of 15 g / hr or more at 35 ° C. and a relative humidity of 50%. If the vaporization amount at 35 ° C. and 50% relative humidity is less than 15 g / hr, it is difficult to lower the temperature of the air taken in from the outside under extreme heat and the like, and a sufficient cooling effect can be obtained continuously. Can not. The vaporization amount in the body cooling device of the present invention is preferably 18 g / hr or more, more preferably 20 g / hr or more, and further preferably 25 g / hr or more. The upper limit of the amount of vaporization is not particularly limited, but is preferably 200 g / hr or less, more preferably from the viewpoint of maintaining a comfortable temperature for a long time without overcooling the user's body. 100 g / hr or less.

In the present invention, the amount of vaporization in the body cooling device is adjusted by vaporizing cooling filter to water and adjusted to an arbitrary amount of water retention, and then blown by an air fan at 35 ° C. and 50% relative humidity for 10 minutes. It is a value calculated according to the following formula by measuring the change in the water retention amount of the vaporization type cooling filter (before and after blowing) when the filter is blown.
Vaporization amount (g / hr) = [vaporization filter mass before blowing (g) −10 minute vaporization filter mass after blowing (g)] × 6
In the above measurement method, “adjust to an arbitrary amount of water retention” means that the amount of water contained in (infiltrated into) the vaporization type cooling filter is adjusted to the amount of water retained when the body cooling device to be measured is used. For example, after adding water to the vaporization type cooling filter, by removing water excessively by draining lightly to such an extent that water does not drip from the filter, or by naturally drying the filter. Can be adjusted. In the measurement, usually, it is only necessary to measure the amount of vaporization by blowing air under the power of an air fan included in the body cooling device to be measured.

  The amount of vaporization in the body cooling device is usually controlled by the configuration of the vaporization type cooling filter. In the body cooling device of the present invention, the vaporization type cooling filter is usually a filter of the type that cools air using the heat of vaporization of water. For example, the air permeability, the water retention rate, and the vaporization type cooling filter of the vaporization type cooling filter. The amount of vaporization can be controlled by adjusting the material and shape, the air volume, the temperature and humidity of the blown air, and the like. In one embodiment, the body cooling device of the present invention preferably includes a vaporization type cooling filter having a vaporization amount of 15 g / hr or more measured under the vaporization amount measurement condition.

In the present invention, the vaporization amount of the vaporization type cooling filter provided in the body cooling device is adjusted to an arbitrary water holding amount by attaching the vaporization type cooling filter to water, and then at a wind speed of 82 m / min at 35 ° C. and a relative humidity of 50% for 10 minutes. Measures the change in the water retention amount of the vaporization type cooling filter (before and after blowing) when air is blown by the air fan under the condition of (the air velocity just below the air fan without the vaporization type cooling filter) and blown to the vaporization type cooling filter. And a value calculated according to the following formula.
Vaporization amount (g / hr) = [vaporization filter mass before blowing (g) −10 minute vaporization filter mass after blowing (g)] × 6
In the measurement method, “adjusting to an arbitrary water retention amount” is the same as the method for adjusting the water retention amount when measuring the vaporization amount of the body cooling device. The “wind speed” means a wind speed directly below the air fan in a state where no vaporization type cooling filter is present, and is a wind speed measured by an anemometer immediately below the air fan (1 to 3 cm from the air fan). The vaporization amount of the vaporization type cooling filter can be measured by blowing air under the above conditions to the vaporization type cooling filter by an air fan capable of generating the above wind speed in a state where the vaporization type cooling filter is not attached. Specifically, for example, it can be measured according to the method (conditions) described in the examples described later.

In this invention, it is preferable that the air permeability of a vaporization type cooling filter is 100-800 cm < ³ > / cm < ² > / sec. When the air permeability of the vaporization type cooling filter is 100 cm ³ / cm ² / second or more, the flow of the air taken into the body cooling device by the air fan and / or the air sent from the body cooling device is caused by the vaporization type cooling filter. Without hindering, a sufficient amount of air required to suppress the rise in the user's body temperature can be passed. Further, when the air permeability of the vaporization type cooling filter is 800 cm ³ / cm ² / second or less, the air taken into the body cooling device and / or the air sent out from the body cooling device and the water contained in the vaporization type cooling filter. As a result, the temperature of the air passing through the vaporization type cooling filter can be effectively lowered. In the present invention, the air permeability of the vaporization type cooling filter is more preferably 120 cm ³ / cm ² / second or more, further preferably 150 cm ³ / cm ² / second or more, and more preferably 700 cm ³ / cm. ² / sec or less, more preferably 600 cm ³ / cm ² / sec or less.
In addition, the said air permeability in this invention can be measured and calculated according to the method prescribed | regulated to JISL1096 "General textile test method".

Moreover, the water retention of the vaporization type cooling filter is preferably 50 to 850% by mass with respect to the total mass when the vaporization type cooling filter is dried. If the water retention rate of the evaporative cooling filter is equal to or higher than the above lower limit value, a high cooling effect can be obtained for a long time with a single water supply, and if the water retention rate is equal to or lower than the above upper limit value, liquid leakage due to vibration during use or the like Is unlikely to occur. In the present invention, the water retention rate of the vaporization type cooling filter is more preferably 80% by mass or more, further preferably 100% by mass or more, more preferably 800% by mass or less, and further preferably 750% by mass or less.
In addition, the said water retention rate can be measured and calculated according to the method as described in the Example mentioned later.

  In one embodiment of the present invention, the vaporization type cooling filter is preferably composed of a water-absorbing porous body. Since the vaporization type cooling filter is composed of a water-absorbing porous body, the contact area with the air that passes through the vaporization type filter is increased, so that the air that passes through the vaporization type cooling filter can be efficiently cooled. As the water-absorbing porous body constituting the vaporization type cooling filter, any water-absorbing porous body that can absorb and retain water can be used. For example, it has continuous pores in a three-dimensional network such as polyurethane foam or polyethylene foam. Examples include porous bodies, fibrous porous bodies such as nonwoven fabrics, and porous cellulose beads. As a vaporization type cooling filter, these may be used independently and may be used in combination of 2 or more type.

In the present invention, the moisture content of the water-absorbing porous body at 20 ° C. and a relative humidity of 65% is preferably 0.5 to 10% by mass. When the water content of the porous body is in the above range, a filter having high water retention performance can be obtained, so that a cooling effect can be exhibited for a long time after water supply. The water content of the water-absorbing porous body constituting the vaporization type cooling filter of the body cooling device of the present invention is more preferably 0.8% by mass or more, further preferably 1% by mass or more, and more preferably 10% by mass. % Or less, more preferably 5% by mass or less.
The moisture content of the porous body is calculated according to the following formula.
Moisture content (mass%) = [(W−W ₀ ) / W ₀ ] × 100
[Wherein, W is a mass in a standard state (20 ° C., 65% RH), and W ₀ is a mass in an absolutely dry state at 20 ° C. ]

In the present invention, the apparent density of the water-absorbing porous body is preferably 0.08 to 0.3 g / cm ³ . If the apparent density of the water-absorbing porous body is equal to or higher than the above lower limit value, a stable porous structure can be maintained even during water retention, so that water leakage from the filter due to vibration during use can be suppressed. . Further, when the apparent density is not more than the above upper limit value, a sufficient amount of water can be absorbed and retained, and the water absorbed inside the porous body can be absorbed at a moderate speed. Therefore, an appropriate amount of vaporization can be secured. The apparent density of the water-absorbing porous body constituting the vaporization type cooling filter of the body cooling device of the present invention is more preferably 0.09 g / cm ³ or more, further preferably 0.1 g / cm ³ or more, Moreover, More preferably, it is 0.25 g / cm < ³ > or less, More preferably, it is 0.2 g / cm < ³ > or less.
In the case of a fibrous porous body, the apparent density of the water-absorbing porous body can be calculated from the thickness and basis weight according to the method specified in JIS L 1913. In the case of an open-celled porous body such as urethane foam, it can be measured and calculated in accordance with JIS K 6401.

Moreover, it is preferable that the birec type water absorption of a water absorptive porous body is 30 mm or more. When the birec-type water absorption is 30 mm or more, a sufficient amount of water can be absorbed and retained, so that a cooling effect can be exhibited for a long time after water supply. In the present invention, the birec-type water absorption amount of the water-absorbing porous body is more preferably 35 mm or more. The upper limit value of the birec-type water absorption amount of the water-absorbing porous material is not particularly limited, but is usually 130 mm or less from the viewpoint of the speed of transfer of water held inside the cooling filter to the surface.
The birec type water absorption amount of the water-absorbing porous material can be measured and calculated according to JIS L 1907.

  The thickness of the water-absorbing porous body is preferably 0.2 to 10 mm. When the thickness of the porous body is not less than the above lower limit, the vaporization type cooling filter has appropriate strength and rigidity, and the form stability during water retention is improved. Moreover, since the contact area with the air which passes a vaporization type filter can fully be ensured that thickness is below the said upper limit, the air which passes a vaporization type cooling filter can be cooled efficiently. In the present invention, the thickness of the porous body is more preferably 0.5 mm or more, further preferably 1 mm or more, and particularly preferably 3 mm or more. Further, it is more preferably 8 mm or less, and further preferably 6 mm or less.

In one embodiment of the present invention, the water-absorbing porous body is preferably a fibrous porous body. In the present invention, as a fiber forming the fibrous porous body, hydrophilicity capable of imparting a moisture content of 0.5 to 10% by mass to the porous body obtained from the fiber at a temperature of 20 ° C. and a relative humidity of 65%. Fibers can be used.
Examples of hydrophilic fibers include cellulosic fibers such as cotton, flax and wood pulp, natural fibers such as chitin, chitosan, wool and silk, semi-synthetic fibers such as acetate, triacetate and promix, rayon, cupra, Examples thereof include recycled fibers such as polynosic rayon, lyocell, and tencel, and synthetic fibers such as polyvinyl alcohol, ethylene-vinyl alcohol copolymer, and polyamide. In the present invention, only one kind of these fibers may be used alone as a hydrophilic fiber used in the fibrous porous body constituting the vaporization type cooling filter, or a combination of two or more kinds may be used. Also good. Among them, from the viewpoint of processability (ease of sewing) and fiber shape stability, the hydrophilic fiber contains at least one selected from the group consisting of polyvinyl alcohol, ethylene-vinyl alcohol copolymer and polyamide. It is more preferable that it contains an ethylene-vinyl alcohol copolymer or polyamide.

  The polyvinyl alcohol preferably has a saponification degree of, for example, 80 to 99 mol%, more preferably 85 to 99 mol%, and still more preferably 90 to 99 mol%. Moreover, it is preferable that average polymerization degree is 500-1000, It is more preferable that it is 600-900, It is especially preferable that it is 650-850.

  The ethylene-vinyl alcohol copolymer preferably has an ethylene unit content (copolymerization ratio) of, for example, 10 to 60 mol%, more preferably 20 to 55 mol%, and more preferably 30 to 55 mol%. What is 50 mol% is still more preferable. The saponification degree of the vinyl alcohol unit is, for example, about 90 to 99.99 mol%, preferably 95 to 99.98 mol%, more preferably about 96 to 99.97 mol%. Moreover, a viscosity average polymerization degree is 200-2500, for example, Preferably it is 300-2000, More preferably, it is about 400-1500 grade.

  Examples of the polyamide include polyimino-1-oxotetramethylene (nylon 4), polytetramethylene adipamide (nylon 46), polycoupleramide (nylon 6), polyhexamethylene adipamide (nylon 66), and polyundecane. Amide (nylon 11), polylauro lactamide (nylon 12), polymetaxylene adipamide, polyparaxylylene decanamide, polybiscyclohexylmethane decanamide, etc., and these copolymers and blends There may be. Among these, nylon 6 is preferable because of its high moisture content.

  In the present invention, the hydrophilic fiber may be a single fiber composed of a single component or a composite fiber composed of a plurality of components. Examples of the shape of the composite fiber include a core-sheath composite fiber, a sea-island composite fiber, and a split composite fiber. Since it has high water absorption and fiber strength, it is preferable that the hydrophilic fiber used for the water-absorbing porous body constituting the vaporization type cooling filter is a core-sheath composite fiber.

  When the hydrophilic fiber is a core-sheath composite fiber, one having a water content of 0.5 to 10% by mass at a temperature of 20 ° C. and a relative humidity of 65% is preferable, and the configuration and form thereof are not particularly limited. It is preferably a core-sheath composite fiber containing at least one selected from the group consisting of polyvinyl alcohol, ethylene-vinyl alcohol copolymer and polyamide exemplified above as hydrophilic fibers as a sheath component, and ethylene-vinyl A core-sheath composite fiber containing an alcohol copolymer or polyamide as a sheath component is more preferable. By forming a porous body using a core-sheath composite fiber containing the above-mentioned components as a sheath component, it has a high water absorption and moisture retention, and has a high strength and excellent morphological stability during water retention. A cooling filter can be obtained.

  In the present invention, the water-absorbing porous body is more preferably a nonwoven fiber molded body. The non-woven fiber molded body is a molded body having a non-woven fiber structure, and examples of the fibers forming the non-woven fiber structure include the hydrophilic fibers described above.

  In one embodiment of the present invention, the non-woven fiber molded body is a core-sheath composite fiber molded body comprising a sheath part composed of a wet heat adhesive resin and a core part composed of a non-wet heat adhesive resin. It is preferable that By forming a vaporization type cooling filter from such a core-sheath composite fiber molded article, the vaporization type cooling filter is lightweight and has high water absorption and moisture retention, and has high strength and excellent shape stability during water retention. A filter can be obtained.

  As the wet heat adhesive resin constituting the sheath portion of the core-sheath composite fiber constituting the nonwoven fiber molded body, for example, it is softened with high-temperature steam or hot water (for example, about 80 to 120 ° C., particularly about 95 to 100 ° C.). And a thermoplastic resin capable of self-adhesion or adhesion to other fibers. Specifically, for example, a cellulose resin (C1-3 alkyl cellulose ether such as methyl cellulose, hydroxy C1-3 alkyl cellulose ether such as hydroxymethyl cellulose, Carboxy C1-3 alkyl cellulose ethers such as carboxymethyl cellulose or salts thereof), polyalkylene glycol resins (poly C2-4 alkylene oxides such as polyethylene oxide and polypropylene oxide), polyvinyl resins (polyvinyl pyrrolidone, polyvinyl ether). Vinyl alcohol polymers, polyvinyl acetals, etc.), acrylic copolymers and alkali metal salts thereof [copolymers comprising units composed of acrylic monomers such as (meth) acrylic acid, (meth) acrylamide] Salts thereof], modified vinyl copolymers (copolymers or salts of vinyl monomers such as isobutylene, styrene, ethylene, vinyl ether, and unsaturated carboxylic acids such as maleic anhydride or anhydrides thereof, etc. ), Polymers introduced with hydrophilic substituents (polyester, polyamide, polystyrene or salts thereof introduced with sulfonic acid groups, carboxyl groups, hydroxyl groups, etc.), aliphatic polyester resins (polylactic acid resins, etc.) Can be mentioned. Furthermore, among polyolefin resins, polyester resins, polyamide resins, polyurethane resins, thermoplastic elastomers or rubbers (such as styrene elastomers), it can be softened at the temperature of hot water (high-temperature steam) to exhibit an adhesive function. Other resins are also included.

  These wet heat adhesive resins can be used alone or in combination of two or more. The wet heat adhesive resin is usually composed of a hydrophilic polymer or a water-soluble resin. Among these wet heat adhesive resins, vinyl alcohol polymers such as ethylene-vinyl alcohol copolymers, polylactic acid resins such as polylactic acid, (meth) acrylic copolymers containing (meth) acrylamide units, A vinyl alcohol polymer containing an α-C2-10 olefin unit such as ethylene or propylene, particularly an ethylene-vinyl alcohol copolymer is preferred.

  In the ethylene-vinyl alcohol copolymer, the ethylene unit content (copolymerization ratio) is, for example, about 10 to 60 mol%, preferably about 20 to 55 mol%, and more preferably about 30 to 50 mol%. When the ethylene unit is in this range, a unique property of having wet heat adhesiveness but not hot water solubility is obtained, and it is possible to obtain a practical strength that hardly causes deformation. When the ratio of the ethylene unit is particularly in the range of 30 to 50 mol%, the processability to a sheet or plate is particularly excellent.

  The saponification degree of the vinyl alcohol unit in the ethylene-vinyl alcohol copolymer is, for example, about 90 to 99.99 mol%, preferably 95 to 99.98 mol%, more preferably 96 to 99.97 mol. %. When the degree of saponification is in the above range, the thermal stability is high and the processability of the fiber is also excellent.

  Although the viscosity average degree of polymerization of an ethylene-vinyl alcohol-type copolymer can be selected as needed, it is 200-2500, for example, Preferably it is 300-2000, More preferably, it is about 400-1500. When the degree of polymerization is within this range, the balance between spinnability and wet heat adhesion is excellent.

  Non-moisture and heat-adhesive resins that constitute the core of the core-sheath composite fiber that constitutes the nonwoven fiber molded body include water-insoluble or hydrophobic resins such as polyolefin resins, (meth) acrylic resins, vinyl chloride Examples thereof include resins, styrene resins, polyester resins, polyamide resins, polycarbonate resins, polyurethane resins, and thermoplastic elastomers. These non-wet heat adhesive resins can be used alone or in combination of two or more.

  Among these non-wet heat adhesive resins, from the viewpoint of heat resistance and dimensional stability, resins having a melting point higher than that of wet heat adhesive resins (particularly ethylene-vinyl alcohol copolymers), such as polypropylene resins and polyester resins Resins and polyamide resins, particularly polyester resins and polyamide resins are preferred from the standpoint of excellent balance between heat resistance and fiber-forming properties.

  Polyester resins include aromatic polyester resins such as poly C2-4 alkylene arylate resins (polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), especially polyethylene terephthalates such as PET. Based resins are preferred. Polyethylene terephthalate-based resins include other dicarboxylic acids (eg, isophthalic acid, naphthalene-2,6-dicarboxylic acid, phthalic acid, 4,4′-diphenylcarboxylic acid, bis (carboxyphenyl) ethane in addition to ethylene terephthalate units. , 5-sodium sulfoisophthalic acid, etc.) and diols (for example, diethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, cyclohexane-1,4-dimethanol, Units composed of polyethylene glycol, polytetramethylene glycol, etc.) may be included at a ratio of about 20 mol% or less.

  Polyamide resins include polyamides 6, polyamides 66, polyamides 610, polyamides 10, polyamides 12, polyamides 6-12 and other aliphatic polyamides and copolymers thereof, half-synthesized from aromatic dicarboxylic acids and aliphatic diamines. Aromatic polyamide is preferred. These polyamide-based resins may also contain other copolymerizable units.

  In the core-sheath composite fiber constituting the nonwoven fiber molded body, the ratio (mass ratio) of the wet heat adhesive resin and the non-wet heat adhesive resin is not particularly limited as long as the wet heat adhesive resin exists on the surface. Adhesive resin / non-humid heat adhesive resin = 90/10 to 10/90, preferably 80/20 to 15/85, and more preferably about 60/40 to 20/80. When the ratio between the wet heat adhesive resin and the non-wet heat adhesive resin is within the above range, it is easy to ensure wet heat adhesiveness and fiber strength.

  The cross-sectional shape (cross-sectional shape perpendicular to the length direction of the fiber) of the core-sheath composite fiber constituting the nonwoven fiber molded body is a general solid cross-sectional shape, such as a round cross-section or an irregular cross-section [flat, elliptical Shape, polygonal shape, 3-14 leaf shape, T shape, H shape, V shape, dogbone (I shape), and the like.

  The average fineness of the core-sheath composite fiber constituting the nonwoven fiber molded body can be selected, for example, from a range of about 0.01 to 100 dtex, preferably 0.1 to 50 dtex, more preferably 0.5, depending on the application. It is about -30 dtex (especially 1-10 dtex). When the average fineness is in this range, the balance between the strength of the fiber and the expression of wet heat adhesion is excellent.

  The average fiber length of the core-sheath composite fiber constituting the nonwoven fiber molded body can be selected, for example, from a range of about 10 to 100 mm, preferably 20 to 80 mm, more preferably about 25 to 75 mm (especially 35 to 55 mm). is there. When the average fiber length is within this range, the fibers are sufficiently entangled, so that the mechanical strength of the molded body is improved.

  The crimp ratio of the core-sheath composite fiber constituting the nonwoven fiber molded body is, for example, about 1 to 50%, preferably 3 to 40%, more preferably 5 to 30% (particularly 10 to 20%). The number of crimps is, for example, about 1 to 100 pieces / inch, preferably about 5 to 50 pieces / inch, and more preferably about 10 to 30 pieces / inch.

  As such a core-sheath conjugate fiber, a commercially available product may be used, and specifically, “Sophista” (manufactured by Kuraray Co., Ltd.) or the like can be used.

  In one embodiment of the present invention, the non-woven fiber molding constituting the vaporization type cooling filter has a non-woven fiber structure obtained from a web composed of the core-sheath composite fiber. The shape is not particularly limited, but is usually a sheet shape or a plate shape.

  In the present invention, the nonwoven fiber molded body has high surface hardness and bending hardness, and has a nonwoven fiber structure having a good balance between lightness and air permeability. It is desirable that they are arranged so as to cross each other while being arranged substantially in parallel to the surface of the fibrous web (nonwoven fiber). Furthermore, it is preferable that the fibers are fused at the intersecting points. In particular, in a portion where fibers other than the intersection are arranged substantially in parallel, when a bundle-like fused fiber fused in a bundle shape with several to several tens is formed, high hardness and strength tend to be obtained. It is in. It seems that these fibers form a “scrum” by partially forming a fused structure at the intersection of single fibers, the intersection of bundle fibers, or the intersection of single fibers and bundle fibers. Water retention and shape stability required as a vaporization type cooling filter with a structure (a structure in which fibers are bonded at the intersection and entangled like a mesh, or a structure in which fibers are bonded at the intersection to constrain adjacent fibers) Etc. can be secured. In the present invention, it is desirable that such a structure is distributed substantially uniformly along the surface direction and the thickness direction of the fiber web.

  Here, “almost parallel to the fiber web surface” means a state in which a portion where a large number of fibers are locally arranged along the thickness direction is not repeatedly present. . More specifically, when an arbitrary cross section of the fiber web of the formed body is observed with a microscope, the proportion of fibers that continuously extend in the thickness direction over 30% or more of the thickness of the fiber web (number ratio) ) Is 10% or less (particularly 5% or less) with respect to all the fibers in the cross section.

  Fibers are arranged in parallel to the fiber web surface because if there are many fibers oriented along the thickness direction (perpendicular to the web surface), the fiber arrangement may be disturbed in the periphery. This is because an unnecessarily large void is formed in the woven fiber, and the water retention and shape stability of the molded body are reduced. Therefore, it is preferable to reduce this gap as much as possible. For this purpose, it is desirable to arrange the fibers as parallel to the fiber web surface as possible. From the viewpoint of realizing such a fiber arrangement, the degree of fiber entanglement by means such as needle punch is preferably low, and more preferably not entangled.

  By arranging the fibers in parallel along the surface direction of the web and dispersing them (or by directing the fibers in a random direction), the fibers cross each other and bond at the intersection, creating small voids. And lightweight. Furthermore, when such a fiber structure is continuous, an appropriate air permeability and surface hardness can be secured. In particular, when a bundle of fibers fused in parallel in the fiber length direction is formed in a place where the fibers are aligned in parallel without intersecting with other fibers, compared to the case where the fibers are composed of only single fibers. High bending strength can be secured mainly. While adhering at the intersection where each fiber intersects, the hardness and strength are further improved by forming several bundled fibers at the intersection between the intersections. Can be. Such a structure can be confirmed from the existence state of the single fiber when the cross section of the compact is observed.

  The fiber constituting the non-woven fiber structure has a fiber adhesion rate of 85% or less (for example, 1 to 85%), preferably 3 to 70%, more preferably 5 to 60% (especially 10%). It is preferable that they are bonded to each other by about ~ 35%. The said fiber adhesion rate shows the ratio of the cross section number of the fiber which adhered 2 or more with respect to the cross section number of all the fibers in a non-woven fiber cross section. Therefore, a low fiber adhesion rate means that a ratio of a plurality of fibers fused to each other (a ratio of fibers fused by fusing) is small.

  In addition, the fibers constituting the nonwoven fiber structure are bonded at the contact points of each fiber, but in order to develop a large bending stress with as few contacts as possible, this bonding point is along the thickness direction. When it is uniformly distributed from the surface of the molded body to the inside (center) and the back surface, sufficient bending stress can be secured, and the form stability is improved.

  Therefore, in the non-woven fiber molded body, in the cross section in the thickness direction, it is preferable that the fiber adhesion rate in each region divided into three equal parts in the thickness direction is in the above range, and the fiber adhesion rate in each region is The difference between the maximum value and the minimum value is 20% or less (for example, 0.1 to 20%), preferably 15% or less (for example, 0.5 to 15%), more preferably 10% or less (for example, 1 to 10%). When the fiber adhesion rate has such uniformity in the thickness direction, it is excellent in hardness, bending strength, folding resistance and toughness. In the present invention, the “region divided into three in the thickness direction” means each region divided into three equal parts by slicing in a direction orthogonal to the thickness direction of the plate-like molded body.

  In the present invention, the basis weight of the nonwoven fiber molded body is not particularly limited, and can be appropriately determined so as to satisfy an apparent density and thickness suitable as a water-absorbing porous body.

  In the present invention, the non-woven fiber molded body constituting the vaporization type cooling filter (or the hydrophilic fiber, core-sheath composite fiber, etc. constituting this) is added in a conventional manner as long as the function as the vaporization type cooling filter is not impaired. Agents, for example, stabilizers (heat stabilizers such as copper compounds, ultraviolet absorbers, light stabilizers, antioxidants, etc.), fine particles, colorants, antistatic agents, flame retardants, plasticizers, lubricants, crystallization speeds A retarder or the like may be contained. These additives can be used alone or in combination of two or more. These additives may be carried on the surface of the molded body or may be contained in the fiber. In addition, as long as the required water retention can be ensured, the non-woven fiber molded body is made of polyester fiber, polyamide fiber, polyolefin fiber, acrylic fiber, polyvinyl fiber, polyvinyl chloride fiber and polyvinylidene chloride. Non-humid heat adhesive fibers such as system fibers may be included.

  The nonwoven fiber molded body constituting the vaporization type cooling filter can be manufactured by using a known method and apparatus for producing a nonwoven fiber structure. Specifically, for example, it can be produced according to a method for producing a molded article described in Japanese Patent No. 4951618, Japanese Patent No. 5719834, and the like.

  In the present invention, the form of the vaporization type cooling filter is not particularly limited, and for example, it may be composed of a water-absorbing porous body such as the above-mentioned nonwoven fiber molded body formed into a sheet shape, plate shape, block shape or the like. As long as the amount of vaporization required for the body cooling device of the present invention can be secured, one (one block) water-absorbing porous body may form a vaporization type cooling filter. From the viewpoint of easily controlling the air permeability and increasing the contact area with the air passing through the vaporizing filter, the vaporizing cooling filter is preferably composed of a plurality of small-piece water-absorbing porous bodies.

  When the vaporization type cooling filter is composed of a plurality of small pieces of water-absorbing porous material, the shape of each small piece is not particularly limited, and may be a sheet shape, a plate shape, a block shape, etc. You may comprise combining. Further, the size of each small piece is not particularly limited, and may be determined as appropriate according to the type of the water-absorbing porous body to be used, the size of the body cooling device, the amount of water retained for cooling, and the like. For example, in one embodiment of the present invention, the shape of the water-absorbing porous body constituting the vaporization type cooling filter is a sheet shape, a plate shape or a block shape from the viewpoint of productivity, and the size is 0.2. In a porous body having a thickness of about 10 mm, it is preferably about 5 to 20 mm square, more preferably about 5 to 15 mm square.

  By configuring the vaporization type cooling filter from a plurality of small-piece water-absorbing porous bodies and adjusting the filling rate (volume%), the air permeability of the vaporization type cooling filter can be easily controlled. The filling rate of the water-absorbing porous body constituting the vaporization type cooling filter may be appropriately selected according to the type of the water-absorbing porous body to be used, the size of the body cooling device, the amount of water retained for cooling, etc. For example, it is preferably 0.5% by volume or more, more preferably 1.0% by volume or more, and preferably 10% by volume or less, more preferably 8% by volume or less with respect to the storage volume of the vaporization type cooling filter. is there.

  In the body cooling device (1) of the present invention, the vaporization type cooling filter (21) includes, for example, the air intake port (12) and the air discharge port (13) of the main body housing member (10) constituting the body cooling device (1). The storage member (20) of the vaporization type cooling filter (21) is provided in at least one of the openings, and the vaporization type cooling filter (21) is moved or biased during use by being housed in the storage member (20). Can be suppressed.

  The storage member (20) of the evaporative cooling filter (21) is air-adjacent to at least one of the air intake port (12) and the air discharge port (13) of the main body storage member (10) that stores the air fan (11). By providing a partition wall (14) having a gap for inflow and outflow of the main body storage member (10), it may be integrally formed as a part of the main body storage member (10). In order to suppress the pressure loss due to the partition wall (14), the partition wall (14) is preferably provided in a linear shape, a lattice shape, a circular center shape, or the like that does not inhibit the inflow / outflow of air. Further, for example, when a vaporization type cooling filter is formed from a single (a lump) water-absorbing porous body such as a sheet or plate, a water-absorbing porous body is provided by providing ventilation holes in the water-absorbing porous body. It is preferable to suppress pressure loss due to the material. In FIG. 1, the vaporization type cooling filter (21) is composed of a plurality of small-piece water-absorbing porous bodies (24). With this configuration, pressure loss due to the vaporization type cooling filter (21) can be suppressed, and the air permeability of the vaporization type cooling filter (21) can be easily controlled.

  When the vaporization type cooling filter (21) is composed of a plurality of small pieces of the water-absorbing porous body (24), a net-like or mesh-like shape that does not hinder the inflow and outflow of water and air in order to facilitate water supply. It is preferable to store the water-absorbing porous body (24) in a bag or a container having a shape and size corresponding to the storage member (20) of the vaporization type cooling filter (21). Further, the storage member (20) of the vaporization type cooling filter (21) is placed outside at least one of the air intake port (12) and the air discharge port (13) of the main body storage member (10) that stores the air fan (11). By providing it detachably, water can be easily supplied by immersing the storage member (20) of the vaporization type cooling filter (21) detached from the main body storage member (10) in water.

  In the body cooling device of the present invention, the vaporization type cooling filter may be arranged on at least one of the air inflow side and the air delivery side of the air fan. For example, a plurality of vaporization type cooling filters may be provided such as being arranged on both the air inflow side and the air delivery side of the air fan, but from the viewpoint of suppressing pressure loss due to the vaporization type cooling filter, the vaporization type cooling filter is Preferably, the air fan is provided on either the air inflow side or the air delivery side. Furthermore, since the vaporization type cooling filter does not touch the wearer during use, and more comfortable wearability can be expected, it is more preferable to provide the vaporization type cooling filter on the air inflow side of the air fan.

Hereinafter, one embodiment of the body cooling device of the present invention will be described more specifically based on FIG.
FIG. 2 is a schematic cross-sectional view of a state in which a body cooling device according to an embodiment of the present invention is attached to a fiber fabric. As shown in FIG. 2, in one embodiment of the present invention, the body cooling device (1) includes an air fan (11) and an evaporative cooling filter (21) on the air inflow side (A) of the air fan (11). And comprising. In one embodiment shown in FIG. 2, the body cooling device (1) includes a main body storage member (10) in which an air fan (11) is stored, and an outside of the air intake port (12) of the main body storage member (10). And a storage member (20) of the vaporization type cooling filter (21) provided detachably. A grid-like air intake (12) and an air exhaust are provided at the air inflow side and the air delivery side end of the main body storage member (10) of the body cooling device (1) in parallel with the rotation direction of the air fan (11). An outlet (13) is formed. At the end of the storage member (20) of the cylindrical evaporative cooling filter (21) open at both ends, as shown in FIG. 3, the same as the air intake port (12) of the main body storage member (10) A lattice-shaped filter unit air intake port (22) and a filter unit air discharge port (23) are formed. The storage member (20) of the vaporization type cooling filter (21) includes the main body storage member (10), the air intake port (12) of the main body storage member (10), and the storage member (20) of the vaporization type cooling filter (21). Are arranged adjacent to each other so as to face the filter air discharge port (23). The storage member (20) of the vaporization type cooling filter (21) is connected to the main body storage member (10) by the engaging portion (15).

  The body cooling device (1) is fixed to a mounting hole provided in the fiber fabric (18) by a fixing ring (17) so that the air delivery side (B) is located on the user side to be cooled. The air fan (11) is driven by supplying electric power from a battery (not shown) connected to the air fan (11) to the motor (16), whereby the housing member ( External air is taken in from the air inlet (22) of the filter part 20) and the air cooled by passing through the vaporization type cooling filter (21) composed of the water-absorbing porous body (24) is stored. It is sent out from the air discharge port (13) of the main body storage member (10) through the filter portion air discharge port (23) of the member (20) and the air intake port (12) of the main body storage member (10).

  The body cooling device of the present invention is used by supplying water to a vaporization type cooling filter before use. The water supply to the vaporization type cooling filter can be carried out by a method such as immersing the vaporization type cooling filter directly or with the storage member of the vaporization type cooling filter in water, exposing it to running water, or dropping water. When an excessive amount of water adheres to the vaporization type cooling filter, water leakage during use can be prevented by removing the excess water by lightly draining it.

In the body cooling device of the present invention, the amount of air passing through the vaporization type cooling filter is not particularly limited as long as the amount of vaporization required for the body cooling device of the present invention can be secured. From the standpoint of not reducing the skin surface temperature more than necessary during long-time use while efficiently achieving a high cooling effect, the body cooling device air exhaust when being sent to the body through the vaporization type cooling filter air volume at the exit (most bodyside air outlet located) is preferably 0.1-0.5 M ³ / min, more preferably 0.2-0.4 m ³ / min. The above-mentioned air volume is 1 to the air outlet of the body cooling device (if the vaporizing cooling filter is arranged on the body side of the body cooling device, the air outlet of the vaporizing cooling filter). 3 cm) can be calculated as a value obtained by multiplying the wind speed measured by the anemometer by the cross-sectional area of the air discharge port.

  By providing the vaporization type cooling filter, the body cooling device of the present invention can maintain the cooling effect for a long time, and can continuously suppress an increase in body temperature. For this reason, the body cooling device of the present invention is particularly suitable for use for the purpose of preventing heat stroke in work or the like under severe environments such as extremely hot environments. The wearable body cooling device of the present invention can be used by being detachably attached to, for example, a textile product for body cooling, a plastic helmet, or the like. Accordingly, the present invention is directed to a textile product for body cooling provided with the body cooling device of the present invention.

  The form of the textile product for body cooling of the present invention is not particularly limited as long as it is a form of a textile product used for cooling the body. For example, various work clothes, protective clothes, sportswear, nursing clothes, It may be clothing such as underwear, a form of clothing that can be worn for cooling the body, such as gloves, socks, a stall, a muffler, a hat, a hood, a bedding such as a blanket, a futon, and a pillow.

  The fabric constituting the body cooling fiber product of the present invention is not particularly limited, and is a known fiber that is generally used in the field depending on the application, the form of clothing, the time of use, the preference, and the like. The dough formed from can be appropriately selected and used. Since the vaporized sweat tends to evaporate from the fabric, it is preferable that the fabric has a relatively high air permeability. Examples of fibers constituting the fabric of the body cooling fiber product include synthetic fibers such as polyester, nylon, vinylon, PP (polypropylene), PE (polyethylene), acrylic, aramid, liquid crystalline polymer, cotton, flax, Cellulose fibers such as wood pulp, natural fibers such as chitin, chitosan, wool, and silk, semi-synthetic fibers such as acetate, triacetate, and promix, and regenerated fibers such as rayon, cupra, polynosic rayon, lyocell, and tencel .

  The textile product for body cooling of the present invention may be composed only of a front fabric or a two-layer structure of a front fabric and a back fabric. When the body cooling fiber product is composed of a front fabric and a back fabric, the front fabric and the back fabric may be a fabric made of the same type of fiber, or a fabric made of different fibers, The backing fabric is preferably a fabric having higher water absorption and breathability and higher tear strength than the front fabric from the viewpoint of comfort and water absorption.

  In the textile product for body cooling, the body cooling device of the present invention can be provided with an attachment hole in the fabric constituting the textile product for body cooling, and attached to the attachment hole. The body cooling device may be attached to the fabric by adhering, sewing, heat welding, or the like, or may be detachably attached using an attachment member such as a fixing ring.

Hereinafter, the embodiment of the textile product for body cooling of this invention is illustrated based on drawing.
FIG. 4 is a schematic rear view of a body cooling garment which is an embodiment of the body cooling textile product of the present invention. In the body cooling garment (2) according to the present invention shown in FIG. 4, the body cooling device (1) according to the present invention includes a body cooling device (30) provided in the back (30) constituting the body cooling garment (2). It is mounted in the mounting hole of 1). The body cooling device (1) is mounted such that the air intake side is positioned outside the body cooling garment (2) and the air discharge port side is positioned on the body side. In the body cooling garment (2) shown in FIG. 4, the vaporization type cooling filter (21) is provided outside the body cooling garment (2) (that is, the air intake side). The air fan is driven by supplying electric power from a battery connected to the air fan to the motor, and the air taken in via the vaporization type cooling filter (21) is vaporized in the vaporization type cooling filter (21). It is cooled using heat and cold air is supplied to the body.

  In the textile product for body cooling and the clothing for body cooling, the position and the number of the body cooling device of the present invention are not particularly limited, depending on the form, structure, use, etc. of the textile product for body cooling and the clothing for body cooling. The air (cold air) flow, workability, wearing feeling, designability, etc. may be appropriately determined. For example, in work clothes worn in a high-temperature environment or the like, two body cooling devices may be disposed on the left and right sides as shown in FIG.

  EXAMPLES Hereinafter, the present invention will be specifically described by way of examples, but these do not limit the scope of the present invention.

  Various physical properties and characteristics in the following examples and comparative examples were measured and calculated according to the following methods.

<Porous body moisture content>
The water content (mass%) of the water-absorbing porous material was calculated according to the following method in accordance with JIS L 0105 (2006).
The porous body (fiber) for measuring the moisture content was allowed to stand in an environment of 20 ° C. and 65% RH for 24 hours, and the mass (W) in the standard state was measured. Next, the mass (W ₀ ) in an absolutely dry state is obtained by drying until the mass difference measured at intervals of 30 minutes or more under a drying condition of 20 ° C. becomes 0.25% or less, and the moisture content ( Mass%) was calculated.
Moisture content (mass%) = [(W−W ₀ ) / W ₀ ] × 100

<Apparent density of porous body>
The apparent density of the porous body was calculated from the values of the basis weight (A) and the thickness (B) according to the method defined in JIS L 1913.
Apparent density of porous body (g / cm ³ ) = A (g / m ² ) / B (mm) / 1000

<Bilec type water absorption of porous body>
The wicking height after 600 seconds was measured according to JIS L 1907 “Test method for water absorption of textile products”.

<Water retention rate of filter>
After measuring the filter mass (filter DRY mass) before water absorption, the filter was submerged in water for 1 minute, then pulled up, measured for water retention mass (filter WET mass), and calculated based on the following equation.
Water retention (mass%) = [(filter WET mass−filter DRY mass) / filter DRY mass] × 100

<Filling rate of filter>
The filling rate (volume%) of the filter in the storage member was calculated based on the following formula by measuring the filter DRY volume (cm ³ ) and the storage member internal volume (cm ³ ).
Filling rate (volume%) = filter DRY volume (cm ³ ) / storage member internal volume (cm ³ ) × 100

<Air permeability of the filter>
In a state where the storage member of the vaporization type cooling filter is filled with the filter, measurement and calculation were performed under the condition of a pressure loss of 125 Pa using a Frazier type air permeability measuring device specified in JIS L 1096 “General Textile Test Method”.

<Vaporization amount of filter>
The amount of vaporization in the body cooling device is 12 cm in diameter installed in a high-temperature thermostatic chamber at 35 ° C. and 50% relative humidity after the vaporization type cooling filter is immersed in water for 1 minute and the weight is adjusted by natural drying until it reaches an arbitrary weight. A storage member of a vaporization filter (storage member internal volume 339 cm ³ , cross-sectional area 113 cm ² , air, which can be attached to the outside of an air intake port of a blower device having an electric air fan with a rated voltage of 7 V and a rated current of 2 A The distance from the fan to the air discharge port of the housing member was filled with a vaporization type cooling filter and blown for 10 minutes. The mass of the vaporization type cooling filter after completion | finish of ventilation was measured, and the vaporization amount was computed.
Vaporization amount (g / hr) = [vaporization filter mass before blowing (g) −10 minute vaporization filter mass after blowing (g)] × 6

<Air volume>
The air volume (m ³ / min) in the examples and comparative examples is the air velocity of 82 m / min (with no vaporization type cooling filter) in the blower (air fan) with the vaporization type cooling filter of each experimental example attached. The value measured by an anemometer at a point 3 cm from the air outlet of the blower when the air was blown at a wind speed directly below the air fan was calculated by multiplying the cross-sectional area of the air outlet.

1. Example 1
(1) Production of body cooling device (body cooling clothing) and evaluation of physical properties (i) Non-woven fiber molded body and vaporization type cooling filter Core component is polyethylene terephthalate, sheath component is ethylene-vinyl alcohol copolymer (ethylene content 44) Core-sheath type composite staple fiber (manufactured by Kuraray Co., Ltd., “Sophista”, fineness of 3.3 dtex, fiber length 51 mm, core-sheath mass ratio = 50/50) is used. Thus, a card web having a basis weight of 500 g / m ² was produced. Next, the card web was sprayed with high-temperature steam of 0.4 MPa so as to pass in the thickness direction of the card web (perpendicularly) and subjected to steam treatment, and the thickness was 5 mm and the apparent density was 0.1 g / cm ³ . A woven fiber molded body was produced. The birec type water absorption of the nonwoven fiber molded body was measured according to the above method.
The obtained nonwoven fiber molded body is cut into small pieces of 1 cm × 1 cm square, and a storage member (storage) for a vaporization type cooling filter that can be attached to the outside of an air intake port of an air blower having an electric air fan including blades having a diameter of 12 cm The inner volume of the member was 339 cm ³ and the cross-sectional area was 113 cm ² ), and 20 g (volume 24 cm ³ ) of the non-woven fiber molded body was filled, and then 140 g of water was absorbed to obtain 160 g of a vaporization type cooling filter. The height of the vaporization type cooling filter in the storage member at the time of filling was about 3 cm. The water retention rate, air permeability and vaporization amount of the vaporization filter were measured according to the above methods. The results are shown in Table 1.

(Ii) Performance Evaluation of Body Cooling Device A storage member for a vaporization type cooling filter that accommodated small pieces of the nonwoven fiber molded body after water absorption was attached to the outside of the air intake port of the blower. A blower was placed in a thermostatic chamber at 35 ° C. and a relative humidity of 50%, and an air fan with a rated voltage of 7 V and a rated current of 2 A was driven to blow air for 10 minutes. A change in the water retention amount (before and after the blowing) of the vaporization type cooling filter was measured, the vaporization amount was obtained, and the latent heat of vaporization was calculated based on the following equation.
Vaporization latent heat (W) = [vaporization filter mass before blowing (g) −10 minute vaporization filter mass after blowing (g)] × water latent heat of vaporization (2257 kJ / kg) / 600
The results are shown in Table 1.

(2) Wear test Long-sleeve work clothes were prepared in which two blowers were mounted symmetrically on the waist. Five subjects wearing general underwear wear the long-sleeved work clothes (cooling garments) with vaporization type cooling filters and perform 10-minute light work (character input using a personal computer) for comfort and work. The sensory evaluation was performed on the sex. The presence / absence of liquid leakage when wearing, comfort and workability were evaluated according to the following criteria. The results are shown in Table 1.

[Comfort evaluation]
○: Four or more subjects felt comfortable.
Δ: Three or more subjects felt comfortable.
X: Three or more subjects felt uncomfortable.

[Workability evaluation]
○: Four or more subjects felt that it was easy to work.
Δ: Three or more subjects felt that it was easy to work.
×: Three or more subjects felt that it was difficult to work.

2. Examples 2-8, 13 and 14 and Comparative Examples 1 and 2
A performance test and a wearing test of the body cooling device were performed by the same procedure as in Example 1 except that the filling amount and water retention amount of the nonwoven fiber molded body shown in Table 1 were used. The results are shown in Table 1.

3. Example 9
A performance test and a wear test of the body cooling device were performed in the same procedure as in Example 1 except that a card web having a basis weight of 750 g / m ² was used. The results are shown in Table 1.

4). Example 10
Using a card web with a basis weight of 1000 g / m ² , a performance test and a wear test of the body cooling device were performed by the same procedure as in Example 1 except that the thickness of the nonwoven fiber molded body was 10 mm. The results are shown in Table 1.

5. Example 11
A card web with a basis weight of 60 g / m ² was prepared using viscose rayon fiber (“Hope” manufactured by Ohmkenshi, fineness 3.3 dtex). Subsequently, the performance test of the body cooling device was performed according to the same procedure as in Example 1 except that this card web was produced by hydroentanglement to produce a nonwoven fiber molded body having a thickness of 0.5 mm and an apparent density of 0.12 g / cm ^3. A wearing test was conducted. The results are shown in Table 1.

6). Example 12
A card web with a basis weight of 60 g / m ² was prepared using viscose rayon fiber (“Hope” manufactured by Ohmkenshi, fineness 3.3 dtex). Next, this card web was produced by high-pressure hydroentanglement (7 MPa) to produce a nonwoven fiber molded body having a thickness of 0.5 mm and an apparent density of 0.12 g / cm ³ , and the resulting nonwoven molded body was 10 cm in diameter (Φ100) A performance test and a wear test of the body cooling device were performed in the same procedure as in Example 1 except that the body was punched into a circle. The results are shown in Table 1.

7). Comparative Example 3
A performance test and a wear test of the body cooling device were performed in the same procedure as in Example 1 except that the nonwoven fiber molded body was punched into a circular shape having a diameter of 10 cm (Φ100). The results are shown in Table 1.

8). Comparative Example 4
Except not performing ventilation, the body cooling device of Example 1 was used and the performance test and wearing test of the body cooling device were done by the same procedure as Example 1. The results are shown in Table 1.

9. Comparative Example 5
Except not having a vaporization type cooling filter, it ventilated with the wind speed shown in Table 1, and performed the performance test and wearing test of the body cooling device by the same procedure as Example 1.

10. Comparative Example 6
Body cooling by the same procedure as in Example 1 except that a polyolefin fiber (core-sheath composite fiber having a core of polypropylene and a sheath of polyethylene, core-sheath mass ratio = 50/50, fineness of 1.7 dtex, fiber length of 51 mm) was used. A device performance test and a wear test were performed. The results are shown in Table 1.

  The body cooling device of the present invention is suitable for use for the purpose of preventing heat stroke in work under severe environments such as intense heat environment, and in particular, various work clothes, protective clothes, sportswear, nursing clothes, Suitable for body cooling clothing such as guardman, secret service uniform, bedding, and driving wear.

1: Body cooling device 2: Body cooling garment 10: Main body storage member 11: Air fan 12: Air intake port 13: Air exhaust port 14: Partition 15: Engaging portion 16: Motor 17: Fixing ring 18: Textile fabric 20 : Filter housing member 21: Evaporative cooling filter 22: Filter part air intake 23: Filter part air outlet 24: Water-absorbing porous body 30: Rear body A: Air inflow side B: Air delivery side

Claims (11)

  An air fan, and a vaporization type cooling filter disposed separately from the air fan, wherein the vaporization type cooling filter is arranged on at least one of an air inflow side and a delivery side of the air fan. A wearable body cooling device having a vaporization amount of 15 g / hr or more at 35 ° C. and 50% relative humidity. The wearable body cooling device according to claim 1, wherein the vaporization type cooling filter has an air permeability of 100 to 800 cm ³ / cm ² / sec.   The wearable body cooling device according to claim 1 or 2, wherein the vaporization type cooling filter is composed of a water-absorbing porous body.   The wearable body cooling device according to claim 3, wherein a moisture content of the water-absorbing porous body at a temperature of 20 ° C and a relative humidity of 65% is 0.5 to 10% by mass. The wearable body cooling device according to claim 3 or 4, wherein the apparent density of the water-absorbent porous body is 0.08 to 0.3 g / cm ³ .   The wearable body cooling device according to any one of claims 3 to 5, wherein a birec-type water absorption amount of the water-absorbing porous body is 30 mm or more.   The wearable body cooling device according to any one of claims 3 to 6, wherein the water-absorbent porous body is a nonwoven fiber molded body.   The nonwoven fabric molded product is a molded product of a core-sheath composite fiber comprising a sheath part composed of a wet heat adhesive resin and a core part composed of a non-wet heat adhesive resin. Wearable body cooling device.   The wearable body cooling device according to claim 8, wherein the wet heat adhesive resin is an ethylene-vinyl alcohol copolymer resin.   A textile product for body cooling comprising the body cooling device according to any one of claims 1 to 9.   The textile product for body cooling according to claim 10, wherein the textile product for body cooling is clothing for body cooling.