Moisturizing agent and using method thereof

Abstract

The present disclosure provides a moisturizing agent suitable for imparting a moisturizing function to an object. The humectants of the present disclosure comprise water and a humectant compound.

Description

Technical Field

[0001] The following disclosure relates to moisturizers and methods of using moisturizers. Background Art

[0002] Regarding a method for imparting a moisturizing function to an arbitrary object, Patent Document 1 discloses a method of imparting a moisturizing agent composition containing an anionic polymer, a cationic polymer, a polyol, and an aqueous liquid to a nonwoven fabric or the like. Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent No. 4892400 Summary of the invention Technical Problems to be Solved by the Invention

[0004] An object of the present disclosure is to provide a moisturizing agent suitable for imparting a moisturizing function to an object, and a method for using the same. Technical solutions for solving technical problems

[0005] The moisturizer of the present disclosure 1 includes water and a humectant compound. The moisturizing agent of the second disclosure is the moisturizing agent of the first disclosure, wherein the content of the moisturizing compound is 50 parts by mass or more and 400 parts by mass or less relative to 100 parts by mass of the water content. The moisturizing agent of the present disclosure 3 is the moisturizing agent of the present disclosure 1 or 2, wherein the total content of the water and the wetting agent compound is 60% by mass or more in 100% by mass of the moisturizing agent. The moisturizing agent of the present disclosure 4 is the moisturizing agent of any one of the present disclosures 1 to 3, and contains a heterocyclic compound as the wetting agent compound, the heterocyclic compound having a structure in which a hydrogen atom is bonded to a carbon atom of an organic group having 1 to 20 carbon atoms via a heteroatom. The moisturizing agent of the present disclosure 5 is the moisturizing agent of the present disclosure 4, wherein the hetero atom is a nitrogen atom or an oxygen atom. The moisturizing agent of the present disclosure 6 is the moisturizing agent of the present disclosure 4 or 5, wherein the hetero compound comprises at least one selected from the group consisting of sugar alcohols having three or more hydroxyl groups in one molecule and (poly)alkylene glycols having 1 to 500 oxyalkylene groups and 2 to 20 carbon atoms in one molecule on average. The moisturizing agent of the present disclosure 7 is the moisturizing agent of any one of the present disclosures 1 to 6, wherein the moisturizing agent contains (poly)glycerol as the wetting agent compound. The moisturizing agent of Present Disclosure 8 is the moisturizing agent of any one of Present Disclosures 1 to 6, and contains glycerin and polyglycerin as the moisturizing compound. The moisturizing agent of the present disclosure 9 is the moisturizing agent of any one of the present disclosures 1 to 8, and is a moisturizing agent used in synthetic fiber cloth. The moisturizing agent of the present disclosure 10 is the moisturizing agent of the present disclosure 9, wherein the synthetic fiber cloth includes at least one selected from the group consisting of a napped portion and a pile portion. The moisturizing agent of the present disclosure 11 is the moisturizing agent according to any one of the present disclosures 1 to 8, and is a moisturizing agent used for at least one type of cloth selected from the group consisting of raised cloth and pile cloth. The moisturizing agent of present disclosure 12 is the moisturizing agent of present disclosure 11, wherein the cloth is synthetic fiber cloth, flannel cloth or fur. The method for using a moisturizing agent of the present disclosure 13 is a method for using the moisturizing agent of any one of the present disclosures 1 to 12 in a synthetic fiber cloth. The method for using a moisturizing agent according to present disclosure 14 is to use the moisturizing agent according to any one of present disclosures 1 to 12 on a cloth selected from a raised cloth and a pile cloth. Beneficial Effects

[0006] According to the present invention, a moisturizing agent suitable for imparting a moisturizing function to an object and a method for using the same can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a photograph of a subject wearing arm cuffs on both arms in Evaluation Test III. Figure 2 It is a graph showing the results of Evaluation Test III. DETAILED DESCRIPTION

[0008] In this specification, the terms "including" and "including at least" mean that other components can also be included unless otherwise specified. The term "or" means options that can be appropriately combined unless otherwise specified. For example, the description of "A, B or C" can be any one of A, B and C, or a combination of two or more of A, B and C. In addition, the numerical range It means greater than A and less than B. “A greater than A” includes the value A, and “B less than B” includes the value B.

[0009] The moisturizing agent of the present embodiment can impart a moisturizing function to an object, such as skin and hair, to moisturize the object. The moisturizing agent comprises water and a wetting agent compound. The moisturizing agent may also contain ingredients other than these ingredients (also referred to as "other ingredients"). As each ingredient, one or more than two ingredients may be used respectively. In this way, a moisturizing agent comprising a composition containing water and a wetting agent compound and further comprising other ingredients is also included in the moisturizing agent of the present disclosure.

[0010] In the above-mentioned moisturizing agent, the total content of water and the wetting agent compound is preferably 60% by mass or more in 100% by mass of the above-mentioned moisturizing agent. Therefore, the above-mentioned moisturizing agent is more suitable for imparting a moisturizing function to an object. The total content of water and the wetting agent compound is more preferably 70% by mass or more, further preferably 80% by mass or more, and particularly preferably 90% by mass or more in 100% by mass of the above-mentioned moisturizing agent.

[0011] The water is not particularly limited, and examples of water preferably used include pure water, ion-exchanged water, distilled water, purified water, and tap water.

[0012] The above-mentioned wetting agent compound is a water-soluble compound that can be ionically bonded with water. Therefore, the wetting agent compound can play a role in retaining moisture through ionic bonds, i.e., a moisturizing effect. In addition to the moisturizing effect, the wetting agent compound can also have the effect of inhibiting water evaporation, i.e., an emollient effect. In the case of obtaining a moisturizer by using a compound having only an emollient effect instead of a wetting agent compound, when the moisturizer is supplied to, for example, cloth products (clothing, etc.), the wearing comfort, touch, and beauty of the supplied cloth products are sometimes reduced. The moisturizer of the present embodiment contains a compound having a moisturizing effect (i.e., a wetting agent compound) together with water, so that the wearing feeling, touch, and beauty of the cloth products will not be damaged, and the moisturizing effect can be shown, so it is preferred.

[0013] The moisturizing agent preferably contains a heterocyclic compound having a structure in which a hydrogen atom is bonded to a carbon atom of an organic group having 1 to 20 carbon atoms via a heteroatom (hereinafter also referred to as a "heterocyclic compound") as the heterocyclic compound. Thus, the moisturizing agent is more suitable for imparting a moisturizing function to an object.

[0014] The heteroatom possessed by the above-mentioned heterocyclic compound is not particularly limited, for example, preferably an oxygen atom (O), a nitrogen atom (N), a sulfur atom (S) and the like. Among them, it is more preferred that the heteroatom is a nitrogen atom (N) or an oxygen atom (O). The structure having a hydrogen bond via an oxygen atom can be, for example, a hydroxyl group (-OH) and the like. In addition, the structure having a hydrogen bond via a nitrogen atom can also be an amino group and the like. Amine groups include both primary amine groups (-NH2) and secondary amine groups (-NH-).

[0015] An organic group refers to a functional group containing one or more carbon atoms. As an organic group having 1 to 20 carbon atoms, a group having one carbon atom bonded to a heteroatom (e.g., a carbonyl group) or a hydrocarbon group having 2 to 20 carbon atoms optionally containing a heteroatom is preferred. The hydrocarbon group may be linear, or may have a branched structure or a ring structure. The heteroatoms that may be contained are not particularly limited, and for example, oxygen atoms (O), nitrogen atoms (N) or sulfur atoms (S) are preferred, and nitrogen atoms (O) or oxygen atoms (N) are more preferred. For example, in the above-mentioned hydrocarbon group containing an oxygen atom as a heteroatom, a hydrocarbon group containing an ether bond (-O-) or an ester bond (-C(=O)-) is also included in the structure. The above-mentioned hydrocarbon group may have a substituent. Specifically, the above-mentioned hydrocarbon group preferably contains a hydrocarbon group in which at least one of the hydrogens bonded to the carbon is substituted by a substituent (functional group) other than hydrogen. The number of carbon atoms of the hydrocarbon group (excluding the number of carbon atoms of the substituent) is preferably 2 or more and 20 or less, more preferably 3 or more and 18 or less, and even more preferably 3 or more and 15 or less.

[0016] The above-mentioned hetero compound is preferably at least one of compound (i) and compound (ii), wherein the compound (i) has a structure in which one or more hydroxyl groups (-OH) are bonded to a carbon atom of an organic group having 1 to 20 carbon atoms, and the compound (ii) has an amino group (-NH2 or -NH-) bonded to a carbon atom of an organic group having 1 to 20 carbon atoms. The above-mentioned moisturizing agent contains such a heterocyclic compound, thereby further being suitable for imparting a moisturizing function to an object. Among them, the above-mentioned hetero compound is more preferably the above-mentioned compound (i). As the above-mentioned compound (ii), preferred examples include urea, sodium pyrrolidonecarboxylate, etc.

[0017] As the above-mentioned compound (i), compounds having two or more hydroxyl groups (also referred to as "polyols") and the like can be cited. As the above-mentioned compound (i), for example, polyvinyl alcohol, sugar alcohol or (poly) alkylene glycol is preferably used. The average degree of polymerization of polyvinyl alcohol is not particularly limited, and for example, it is preferably 100 to 2000. The above-mentioned compound (i) is more preferably at least one selected from the group consisting of sugar alcohols and (poly) alkylene glycols. It is particularly preferred that the above-mentioned heterocyclic compound is at least one selected from the group consisting of sugar alcohols having three or more hydroxyl groups in one molecule and (poly) alkylene glycols having an average of 1 to 500 oxyalkylene groups and 2 to 20 carbon atoms in one molecule.

[0018] The above-mentioned sugar alcohol is a polyol obtained by reducing the carbonyl group of a sugar molecule. The sugar molecule may be either a monosaccharide or a polysaccharide, but is preferably a monosaccharide. In addition, the above-mentioned sugar alcohol is preferably a sugar alcohol having more than 3 hydroxyl groups in one molecule. That is, the number of hydroxyl groups in one molecule of the above-mentioned sugar alcohol is preferably 3 or more, preferably 5 or more. The number of hydroxyl groups in one molecule of sugar alcohol is preferably 20 or less, more preferably 15 or less, and further preferably 10 or less. The range of the number of hydroxyl groups in one molecule of sugar alcohol is preferably 3 or more and 20 or less, more preferably 3 or more and 15 or less, and further preferably 3 or more and 10 or less.

[0019] The above-mentioned sugar alcohol is preferably, for example, (poly)glycerol, sorbitol, xylitol, mannitol, maltitol, erythritol, lactitol, reduced starch syrup or isomalt. Among them, the sugar alcohol is preferably (poly)glycerol. The moisturizer preferably contains (poly)glycerol as the above-mentioned wetting agent compound. (Poly)glycerol refers to at least one selected from glycerol and polyglycerol. Polyglycerol refers to a polymer of glycerol, for example, a dimer (diglycerol), a trimer (triglycerol) and other n-polymers (n represents an integer greater than 2). n is preferably greater than 2 and less than 10, more preferably greater than 2 and less than 5, and further preferably 2.

[0020] The (poly)alkylene glycol is at least one selected from a monoalkylene glycol having an average addition mole number of oxyalkylene groups of 1 and a polyalkylene glycol having an average addition mole number of 2 or more. The number of carbon atoms of the oxyalkylene group is preferably 2 or more and 20 or less, more preferably 2 or more and 10 or less, further preferably 2 or more and 5 or less, and particularly preferably 2 or more and 3 or less. In addition, in the (poly)alkylene glycol, the average addition mole number of oxyalkylene groups possessed by the polyalkylene glycol is preferably 2 or more and 500 or less. In the (poly)alkylene glycol, the average addition mole number of oxyalkylene groups possessed by the polyalkylene glycol is more preferably 50 or more and 400 or less, further preferably 200 or more and 300 or less.

[0021] Therefore, the (poly)alkylene glycol preferably contains at least one of a monoalkylene glycol having an oxyalkylene group having 2 to 20 carbon atoms and a polyalkylene glycol having an average of 2 to 500 oxyalkylene groups having 2 to 20 carbon atoms in one molecule. The (poly)alkylene glycol more preferably contains at least one of a monoalkylene glycol having an oxyalkylene group having 2 to 10 carbon atoms and a polyalkylene glycol having an average of 50 to 400 oxyalkylene groups having 2 to 10 carbon atoms in one molecule. The (poly)alkylene glycol further preferably contains at least one of a monoalkylene glycol having an oxyalkylene group having 2 to 5 carbon atoms and a polyalkylene glycol having an average of 200 to 300 oxyalkylene groups having 2 to 5 carbon atoms in one molecule. The (poly)alkylene glycol particularly preferably contains at least one selected from the group consisting of monoalkylene glycol having an oxyalkylene group having 2 to 3 carbon atoms and polyalkylene glycol having an average of 200 to 300 oxyalkylene groups having 2 to 3 carbon atoms in one molecule.

[0022] The above-mentioned moisturizing agent particularly preferably contains (poly)glycerol as the above-mentioned moisturizing compound. As the (poly)glycerol, either a moisturizing agent containing only glycerol or a moisturizing agent containing glycerol and polyglycerol is preferred. In the latter moisturizing agent, as described above, polyglycerol is preferably glycerol. Polymers, more preferably More preferably, it is a dimer (ie, diglycerol).

[0023] The proportion of (poly)glycerol in 100% by mass of the above-mentioned wetting compound (i.e., the total content of glycerol and polyglycerol) is preferably 10% by mass or more, more preferably 20% by mass or more, further preferably 30% by mass or more, and particularly preferably 40% by mass or more. The upper limit of the proportion of (poly)glycerol in 100% by mass of the above-mentioned wetting compound is preferably 100% by mass. In addition, the mass ratio of glycerol to polyglycerol (glycerol / polyglycerol) is preferably 10 to 100 / 0 to 90, more preferably 40 to 100 / 0 to 60, and further preferably 55 to 100 / 0 to 45.

[0024] The above-mentioned moisturizing agent preferably contains (poly)glycerol and sugar alcohols other than (poly)glycerol as the above-mentioned wetting compound. Sugar alcohols other than (poly)glycerol are preferably at least one compound selected from the group consisting of sorbitol, xylitol, mannitol, maltitol, erythritol, lactitol, reduced starch syrup and isomalt. In 100% by mass of the above-mentioned wetting compound, the proportion of sugar alcohols other than (poly)glycerol is preferably 70% by mass or less, more preferably 50% by mass or less, and further preferably 40% by mass or less. In 100% by mass of the above-mentioned wetting compound, the lower limit of the proportion of sugar alcohols other than (poly)glycerol is preferably 0% by mass.

[0025] In the above-mentioned moisturizing agent, it is preferred that the content of the moisturizing compound (the total amount when using two or more kinds) is 50 parts by mass or more and 400 parts by mass or less relative to 100 parts by mass of the content of water. Thus, in the object to which the above-mentioned moisturizing agent is supplied, the moisturizing effect is manifested for a longer period of time, and the supply of the above-mentioned moisturizing agent to the object becomes easier. From the viewpoint of further improving the moisturizing effect, the content of the above-mentioned moisturizing compound is more preferably 100 parts by mass or more relative to 100 parts by mass of the content of water, and more preferably 200 parts by mass or more. In addition, from the viewpoint of further improving the ease of supply to the object, the content of the above-mentioned moisturizing compound is more preferably 350 parts by mass or less relative to 100 parts by mass of the content of water, more preferably 300 parts by mass or less, and particularly preferably 250 parts by mass or less. Relative to 100 parts by mass of the content of water, the range of the content of the above-mentioned moisturizing compound is more preferably 100 parts by mass or more and 350 parts by mass or less, more preferably 200 parts by mass or more and 300 parts by mass or less, and particularly preferably 200 parts by mass or more and 250 parts by mass or less.

[0026] The form of water and the wetting compound in the above-mentioned moisturizing agent is not particularly limited. In the above-mentioned moisturizing agent, water and the wetting compound can be dissolved or dispersed in each other. The above-mentioned moisturizing agent is preferably a form containing a product in which a part of the wetting compound is dissolved in water to form an aqueous solution and the remaining part of the wetting compound.

[0027] The wetting agent may also contain other ingredients as required within the scope of not damaging the effect of imparting the moisturizing function to the object. Other ingredients are not particularly limited, for example, anti-crystallization agents, compounds that improve the affinity of water and wettability compounds (also referred to as affinity enhancers), deodorants, antibacterial agents, aromatics, cooling agents, warming agents, waterproofing agents, hydrophobic agents, insect repellents, antistatic agents, etc. are listed, and they may also be contained in the wetting agent as other ingredients. The content of other ingredients in the wetting agent can be appropriately set according to the performance of each component. In the wetting agent, for example, it is preferred that the total content of other ingredients is less than 40% by mass in 100% by mass of the above-mentioned wetting agent. The total content of other ingredients in 100% by mass of the wetting agent is more preferably less than 30% by mass, further preferably less than 20% by mass, and particularly preferably less than 10% by mass.

[0028] For example, when the above-mentioned moisturizing agent contains a compound that is easily crystallized (such as sorbitol, etc.) as the above-mentioned wetting compound, the above-mentioned moisturizing agent preferably contains an anti-crystallization agent. Such a moisturizing agent is excellent in the effect of imparting a moisturizing function, and fully suppresses the effect of adding a moisturizing agent on the beauty of an object (such as clothing, etc.), so it is preferred. As an anti-crystallization agent, for example, LM pectin or gum arabic can be listed. In addition, it is also preferred that the above-mentioned moisturizing agent contains an affinity enhancer in addition to the wettable compound. As a preferred specific example of the affinity enhancer, alcohols can be listed. As a specific example of alcohol as an affinity enhancer, for example, primary alcohols or aromatic alcohols having a carbon chain of about 2 to 6 carbon atoms (which can be either linear or branched) can be listed.

[0029] The shape of the moisturizing agent is not particularly limited, and may be, for example, liquid, paste, gel, etc. In addition, the moisturizing agent may be prepared by mixing the above-mentioned components. The mixing method is not particularly limited.

[0030] The moisturizer of the present embodiment can embody the moisturizing effect on the object to which the moisturizer is provided, and is easy to supply to the object. Therefore, it is suitable for imparting a moisturizing function to the object. It is preferred to provide the moisturizer to the object in a manner that the moisturizer is attached to the surface of the object (the object to be supplied), and it is preferably carried out in a manner that the moisturizer is in a state of covering at least a part of the surface of the object (that is, the moisturizer is attached to at least a part of the surface of the object). For example, it is preferred to spray, immerse or apply the moisturizer to the surface of the object, and it is more preferred to spray. In the case of spraying, the above-mentioned moisturizer is used in a state in which it is put into a spray device such as a spray device, but the spray device containing the above-mentioned moisturizer is one of the preferred uses of the moisturizer disclosed in the present invention. The coating device containing the above-mentioned moisturizer is also one of the preferred uses of the moisturizer of the present invention. In addition, the spray device can also be a so-called aerosol spray device in which liquefied gas or compressed gas and moisturizer are enclosed in a container with a valve, and the moisturizer is released from the valve by the force of the gas. The spray device is preferably a device that sprays the moisturizer from an electric spray nozzle such as a two-fluid nozzle. According to the spray device including the electric spray nozzle, even when the spray amount per unit time is small, the moisturizing agent can be sprayed stably.

[0031] The object to which the moisturizing agent is supplied may be any non-living thing, and preferably a cloth product. That is, the moisturizing agent is preferably supplied to a cloth product. Among cloth products, a cloth product that comes into contact with the skin is more preferred. By using the cloth product supplied with the moisturizing agent in contact with the skin, the moisturizing effect of the skin, hair, etc. can be fully manifested. In addition, compared with the case of using a commercial moisturizing agent that is directly supplied to the skin, when the cloth product supplied with the moisturizing agent is used in contact with the skin, the moisturizing effect can be manifested for a longer time. It should be noted that the cloth product includes a non-woven fabric product and a woven fabric product.

[0032] As the cloth products in contact with the above-mentioned skin, preferably clothing, bedding, towels or medical fabrics, etc. Among them, at least one selected from clothing and bedding is more preferred. As clothing, for example, underwear, socks, tights, stockings, gloves, sleeves, neckbands, stockings, thick scarves (mufflers), scarves (scarfs), handkerchiefs, hats, etc. can be listed. As bedding, for example, pillow covers, quilt covers, bed sheets, mats, blankets, towel quilts, swaddling clothes, etc. can be listed. As towels, various towels can be listed, and as medical fabrics, bandages, gauze, protective gear, etc. can be listed.

[0033] In particular, the object to which the moisturizing agent is supplied is preferably a synthetic fiber cloth, and the moisturizing agent is preferably a moisturizing agent for synthetic fiber cloth. Synthetic fiber cloth is a cloth formed using at least synthetic fibers. Synthetic fibers are preferably polyethylene (also referred to as PE) or polyester, and polyethylene terephthalate (also referred to as PET) is also preferred among polyesters. Thus, the synthetic fiber cloth is preferably a cloth obtained from at least one selected from the group consisting of PE and PET.

[0034] The synthetic fiber cloth preferably has at least one selected from the group consisting of a raised portion and a pile portion. The raised portion is the portion where the fibers on the surface of the cloth are raised, and the pile portion is the total (e.g., cut pile) or coil (e.g., loop pile) formed by the fibers on the surface of the cloth. The raised portion also includes a portion where the pile portion is cut as needed to make it raised. Among them, the synthetic fiber cloth more preferably has a raised portion, and is further preferably a polar cloth. Polar cloth refers to a finely processed cloth in which a woolen fabric is shrunken and raised to make the pile so close to the weave that the eye of the fabric cannot be seen. It refers to a cloth with arranged pile, for example, formed using synthetic fibers. Polar cloth can also be said to be an example of a synthetic fiber cloth with a raised portion.

[0035] The object to which the moisturizing agent is supplied is also preferably at least one kind of cloth selected from the group consisting of raised cloth and fleece cloth (also referred to as cloth X), and the moisturizing agent is also preferably a moisturizing agent used for at least one kind of cloth selected from the group consisting of raised cloth and fleece cloth. Raised cloth is cloth having a raised part, and fleece cloth is cloth having a fleece part. The cloth X is more preferably a synthetic fiber cloth, flannel cloth, or fur, and is further preferably a synthetic fiber cloth. The synthetic fiber cloth is as described above. Among them, the cloth X is particularly preferably a polarized cloth.

[0036] Polar fabric supplied with the above-mentioned moisturizing agent can show a significantly high moisturizing effect for a longer period of time compared with, for example, cotton fabric supplied with the above-mentioned moisturizing agent. In particular, when the above-mentioned moisturizing agent contains glycerin and polyglycerol as the moisturizing compound, such an effect is significantly manifested. In this way, a method of using the above-mentioned moisturizing agent on a synthetic fiber fabric and a method of using the above-mentioned moisturizing agent on at least one type of fabric selected from a raised fabric and a fleece fabric are included in the present disclosure. In addition, the use of a mixture containing water and the above-mentioned moisturizing compound (i.e., the moisturizing agent of the present disclosure) as a moisturizing agent supplied to a synthetic fiber fabric and the use of a mixture containing water and the above-mentioned moisturizing compound (i.e., the moisturizing agent of the present disclosure) as a moisturizing agent supplied to at least one type of fabric selected from a raised fabric and a fleece fabric are also included in the present invention. [Example]

[0037] The present disclosure will be described in more detail below with reference to Examples, but the present disclosure is not limited to these Examples. Unless otherwise specified, "%" means "mass %".

[0038] (Examples 1 to 5, Comparative Examples 1 and 2) For each example, a moisturizer was prepared by mixing the components shown in Table 1 at the composition ratio shown in Table 1. The moisturizer obtained was subjected to the following evaluation test I to evaluate the moisturizing function imparting effect.

[0039] (Evaluation Test I) On the inner surface of the right arm side of a pair of 100% cotton arm cuffs, a moisturizing agent with the following composition was applied at a rate of 0.6 mg / cm using an electric sprayer. 2 The spray volume was sprayed for 2 minutes and dried for 3 minutes. Then, the arm sleeve on the right arm side with the moisturizing agent attached was worn on the right arm, and the arm sleeve for the left arm without the moisturizing agent attached was worn on the left arm, and left for 5 hours. The moisture content of the skin before wearing and the moisture content of the skin after wearing for 5 hours were measured at the same site, and "Δ" was calculated using the following formulas (1) to (3). The results are shown in Table 1. Moisture content change A: On the right arm wearing the right arm sleeve sprayed with moisturizer, the moisture content of the skin before wearing was subtracted from the moisture content of the skin at the same site after wearing for 5 hours (refer to formula (1)). Moisture content change B: The moisture content of the skin before wearing the left arm sleeve without spraying moisturizer was calculated by subtracting the moisture content of the skin after wearing the sleeve for 5 hours from the moisture content of the skin at the same location (see formula (2)). In addition, the "Moisture Checker" manufactured by SCALA Co., Ltd. was used as a measuring device. It can be said that the larger the Δ is, the higher the moisturizing effect can be obtained. The Δ values ​​described in Table 1 are evaluated in 5 stages from 1 to 5. The larger the number in the 5-stage evaluation is, the higher the moisturizing effect can be obtained. This evaluation test was performed under the conditions of room temperature of 23°C and humidity of 40%. Moisture content change A = moisture content of the skin after wearing for 5 hours - moisture content of the skin before wearing (1) Moisture content change B = moisture content of the skin after wearing for 5 hours - moisture content of the skin before wearing (2) △ = moisture content change A - moisture content change B (3)

[0040] [Table 1]

[0041] As each component described in Table 1, the following products were used respectively. Water: Ion-exchanged water Glycerin: "Concentrated Glycerin for Cosmetics (Product Code: B0002193)" manufactured by Kao Corporation Sorbitol: "Sorbitol (Product Code: B0002769)" manufactured by Kao Corporation Diglycerin: "Diglycerin S" manufactured by Sakamoto Pharmaceutical Industry Co., Ltd. Propylene glycol: Product name: "ZEMEA(R) Select Propylene Glycol" manufactured by Dupont Specialty Products Co., Ltd.

[0042] Examples 1 to 5 achieved higher moisturizing effects than Comparative Examples 1 and 2. The moisturizing agent obtained in the method has an excellent effect of imparting a moisturizing function to clothes.

[0043] In addition, the moisture content (p) of the armband with moisturizing agent attached after being worn on the skin of the test subject for 5 hours was compared with the moisture content (q) of the armband without moisturizing agent attached after applying a commercial moisturizing agent directly applied to the skin to the test subject's skin for 5 hours. As a result, even when any of the armbands with moisturizing agent attached obtained in Examples 1 to 5 was used, the moisture content (p) of the armband after being worn on the skin of the test subject for 5 hours was much higher than the above moisture content (q).

[0044] Next, in order to study the effect of supplying a moisturizing agent to the polar fabric, the following evaluation tests II to IV were performed using the moisturizing agent obtained in Example 3 ("moisturizing agent A"). In the following tests, a commercially available arm cuff made of 100% polyester polar fabric (i.e., an arm cuff of polar material) was used as the arm cuff.

[0045] (Evaluation Test II) "Δ" was calculated in the same manner as in Evaluation Test I except that the moisturizing agent A was used and an arm cuff of a polar material was used. The results are shown in Table 2.

[0046] [Table 2]

[0047] Comparing the results of evaluation test I and evaluation test II, it is clear that the skin is moisturized for a longer time when wearing the armband made of polar material than when wearing the armband made of cotton. In other words, it is known that the moisturizing effect of the above-mentioned moisturizing agent is particularly significant when applied to polar fabric compared to cotton fabric.

[0048] (Evaluation Test III) A pair of arm cuffs (two arms) of granulated material corresponding to the number of subjects were prepared for each subject. One arm cuff of the pair of arm cuffs was supplied with moisturizing agent A for each subject. Specifically, moisturizing agent A was sprayed onto the inner surface of each arm cuff using an electric sprayer. At this time, the adhesion density of moisturizing agent A in each arm cuff was set to 0.4 mg / cm 2 Each subject wore the arm cuff (referred to as "arm cuff a") obtained in this way on the right arm. Each subject wore another arm cuff (referred to as "arm cuff c") on the left arm. In addition, the moisturizing agent A was not applied to the arm c.

[0049] Different from the above, for comparison, a pair of arm sleeves (for both arms) of a granulated material corresponding to the number of subjects were prepared for each subject. Each subject directly applied a commercially available moisturizer B (0.25 g) on ​​the right arm and then wore the arm sleeve (referred to as "arm sleeve b"). Each subject wore another arm sleeve (referred to as "arm sleeve d") on the left arm without any application. Moisturizer B is a commercially available lotion for dry skin and ultra-dry skin that is believed to have a high degree of sustainability in moisturizing effect, and it has both moisturizing and emollient effects. In addition, moisturizer A was not applied to arm sleeves b and d.

[0050] Figure 1This is a photo of a subject wearing the armband on both arms. Each subject wore the armband on both arms as described above and waited for 5 hours. After that, the armband was removed after 5 hours, and the moisturizing feeling of each arm was evaluated according to the following 5 stages. In this test, a total of 6 subjects were included, and the details of the subjects were 3 healthy adult males in their 50s and 3 healthy adult females in their 50s to 60s.

[0051] In addition, although the date when each subject wore armbands a and c (February 29, 2024) and the date when each subject wore armbands b and d (March 1 of the same year) were different dates, the time, weather, temperature and humidity of the experiments were roughly the same.

[0052] (Evaluation Criteria 1) The evaluation criteria when the armbands a and c were worn were as follows. In addition, the moisturizing agent A was not applied to the armband c. 5: When wearing armband a with moisturizing agent A attached, the skin felt much more moisturized after a long period of time compared to when wearing armband c. 4: When wearing arm cuff a with moisturizing agent A attached, the skin felt moisturized over a long period of time compared to when wearing arm cuff. 3: When wearing arm cuff a with moisturizing agent A attached, the skin always feels moisturized after a long time compared to when wearing arm cuff. 2: When wearing arm cuff a with moisturizing agent A attached, there is almost no difference in moisturizing effect compared to when wearing arm cuff. 1: When wearing arm cuff a with moisturizing agent A attached, no difference in moisturizing effect can be felt at all compared to when wearing arm cuff c.

[0053] (Evaluation Criteria 2) The evaluation criteria when the armbands b and d were worn were as follows: In addition, the moisturizing agent B was applied to the right arm of each test subject, and the moisturizing agent B was not applied to the left arm. 5: After applying moisturizer B directly to the skin and then wearing armband b, the skin felt much more moisturized after a long period of time compared to when wearing armband d. 4: After applying moisturizing agent B directly to the skin, the armband b was worn. Compared with the armband d, the skin felt moisturized over a long period of time. 3: After applying moisturizing agent B directly to the skin, when wearing arm cuff b, the skin always feels moisturized after a long time, compared with when wearing arm cuff d. 2: When moisturizing agent B was applied directly to the skin and then arm cuff b was worn, there was almost no difference in moisturizing effect compared to when arm cuff d was worn. 1: When moisturizing agent B was directly applied to the skin and then arm cuff b was worn, there was no difference in moisturizing effect compared to when arm cuff d was worn.

[0054] As a result, the average value of the six subjects was 4.8 points in the evaluation when wearing arm cuffs a and c (refer to the above evaluation criteria (1)), and 2.8 points in the evaluation when wearing arm cuffs b and d (refer to the above evaluation criteria (2)). That is, when the subjects wore arm cuff a with moisturizing agent A attached, they felt that their skin was moisturized for a long time compared to when moisturizing agent B was directly applied to the skin and arm cuff was worn thereon. Therefore, it can be said that the moisturizing effect of moisturizing the skin through clothing with moisturizing agent A is higher than that of applying moisturizing agent B directly to the skin.

[0055] Here, as described above, the moisturizing agent B is an emulsion for dry skin and very dry skin with a high degree of sustained moisturizing effect, and has both moisturizing and emollient effects. In the previous expectation, the moisturizing effect (especially the sustained moisturizing effect) when the moisturizing agent B is directly applied to the skin and the arm cuff c is worn thereon is equal to or higher than the case of wearing the arm cuff a to which the moisturizing agent A is applied, but in fact, on the contrary, the moisturizing effect is very high when the arm cuff a to which the moisturizing agent A is applied is worn. This can be said to be a very surprising effect for those skilled in the art.

[0056] (Evaluation Test IV) (Test Example 1) While conducting the evaluation test III, the following moisture content changes a and c were calculated for each subject. In addition, as measuring instruments, "Cutometer (registered trademark) MPA580" (instrument) and "Corneometer (registered trademark) CM825" (probe) manufactured by INTEGRAL Co., Ltd. were used. The moisture content change a was obtained by subtracting the skin moisture content of the right arm before wearing the arm cuff a from the skin moisture content of the right arm after wearing the arm cuff for 5 hours. The measurement site was the same site before wearing the arm cuff a and after wearing it for 5 hours. The moisture content change c was obtained by subtracting the skin moisture content of the left arm before wearing the arm cuff c from the skin moisture content of the left arm after wearing the arm cuff c for 5 hours. The measurement site was the same site before wearing the arm cuff c and after wearing it for 5 hours. Then, "Δ1" is calculated by subtracting the water content change c from the water content change a.

[0057] Similarly, while conducting the evaluation test III, the following moisture content changes b and d were calculated for each subject. In addition, as measuring equipment, "Cutometer (registered trademark) MPA580" (equipment) and "Corneometer (registered trademark) CM825" (probe) manufactured by INTEGRAL Co., Ltd. were used. The moisture content change b was obtained by subtracting the skin moisture content of the right arm before wearing the arm cuff b and after applying the moisturizer B from the skin moisture content of the right arm after wearing the arm cuff b for 5 hours. The measurement site was the same before wearing the arm cuff b and after wearing it for 5 hours. The moisture content change d was obtained by subtracting the moisture content of the left arm skin before wearing the arm cuff d from the moisture content of the left arm skin after wearing the arm cuff d for 5 hours. The measurement site was the same site before wearing the arm cuff d and after wearing it for 5 hours. Then, "Δ2" is calculated by subtracting the water content change d from the water content change b.

[0058] exist Figure 2 Δ1 and Δ2 for each subject are shown in FIG. Figure 2 is a graph showing the results of Evaluation Test III. Figure 2 In the graph, Δ1 is represented by a bar graph and Δ2 is represented by a dot. A, B, C, D, E, and F shown on the horizontal axis are the names of the six subjects in total. For example, for subject A, Δ2 is about 0 (actually -0.3), and Δ1 is about 20.0 (actually 20.1). In addition, Table 3 shows the average value of Δ1 for the six subjects and the average value of Δ2 for the six subjects.

[0059] [Table 3]

[0060] Figure 2 The results of Table 3 (Test Example 1) can be said to be the results that confirmed the moisturizing feeling of each subject in the evaluation test III.

[0061] (Test Example 2) For reference, the following test was performed. As the arm cuff a in the evaluation test III, a 100% cotton arm cuff was used and the adhesion density of the moisturizing agent A in the arm cuff a was set to 1.0 mg / cm 2 In addition, in the same manner as in evaluation test IV, the water content change amounts a and c were calculated for each subject, and Δ1 was calculated. The average values ​​of Δ1 for the six subjects are shown in Table 3. However, this test was conducted in June 2023.

[0062] By comparing the results (Δ1) of Test Example 1 and Test Example 2, it can be seen that the skin is moisturized for a longer time when the armband made of polar material is worn than when the armband made of cotton is worn. In addition, Test Example 2 was implemented in the summer, while Test Example 1 was implemented in the winter when the skin is prone to dryness and the adhesion density of moisturizer A was greater in Test Example 2, it was predicted that Δ1 of Test Example 2 would be higher, but in fact, Δ1 of Test Example 1 was significantly higher than Δ1 of Test Example 2. Considering this, it can be seen that the moisturizing effect of the above moisturizer is particularly significant when it is provided to polar fabric compared to cotton fabric. Description of Reference Numerals

[0063] a, c: Arm sleeve for right arm b, d: Arm sleeve for left arm

Claims

1. A moisturizing agent, characterized in that: Contains water and a wetting agent compound.

2. The moisturizing agent according to claim 1, characterized in that The content of the wetting compound is 50 parts by mass or more and 400 parts by mass or less relative to 100 parts by mass of the water content.

3. The moisturizing agent according to claim 1, characterized in that The total content of the water and the wetting agent compound is 60% by mass or more in 100% by mass of the moisturizing agent.

4. The moisturizing agent according to claim 1, characterized in that The moisturizing agent includes a heterocyclic compound as the wetting agent compound, wherein the heterocyclic compound has a structure in which a hydrogen atom is bonded to a carbon atom of an organic group having 1 to 20 carbon atoms via a hetero atom.

5. The moisturizing agent according to claim 4, characterized in that The hetero atom is a nitrogen atom or an oxygen atom.

6. The moisturizing agent according to claim 4, characterized in that The heterocyclic compound includes at least one selected from the group consisting of sugar alcohols having three or more hydroxyl groups in one molecule and (poly)alkylene glycols having 1 to 500 oxyalkylene groups having 2 to 20 carbon atoms on average in one molecule.

7. The moisturizing agent according to claim 1, characterized in that (Poly)glycerol is included as the wetting agent compound.

8. The moisturizing agent according to claim 1, characterized in that Glycerol and polyglycerol are contained as the wetting compound.

9. The moisturizing agent according to any one of claims 1 to 8, characterized in that The moisturizing agent is a moisturizing agent used on synthetic fiber cloth.

10. The moisturizing agent according to any one of claims 1 to 9, characterized in that The synthetic fiber cloth includes at least one selected from the group consisting of a napped portion and a pile portion.

11. The moisturizing agent according to any one of claims 1 to 8, characterized in that The moisturizing agent is a moisturizing agent used on at least one type of cloth selected from the group consisting of raised cloth and pile cloth.

12. The moisturizing agent according to claim 11, characterized in that The cloth is synthetic fiber cloth, flannel cloth or fur.

13. A method for using a moisturizer, characterized in that: The moisturizing agent according to any one of claims 1 to 8 is used on a synthetic fiber cloth.

14. A method for using a moisturizer, characterized in that: The moisturizing agent according to any one of claims 1 to 8 is used on at least one kind of cloth selected from the group consisting of raised cloth and fleece cloth.

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