Wet wipe lotion and wet wipes

Abstract

To provide a milky lotion for wet sheets reducing a burden on a skin and capable of wiping off dirt with a small number of sheets.SOLUTION: A milky lotion for wet sheets formed by mixing an oil solution, an emulsion and a thickener, when a ratio of the oil solution to the emulsion mixed in the milky lotion is 1:5 to 1:19, and 0.01 mass% to 0.1 mass% of the thickener is mixed therein, it can favorably remove dirt. When the milky lotion includes an appropriate amount of thickener mixed therein and is thick, then it becomes easy to cling to dirt so as to easily remove the dirt. When a wet sheet S is formed by impregnating a base sheet 10 with the milky lotion for wet sheets, it can favorably wipe off dirt containing fat such as feces and urine. The dirt can be wiped off with a small number of times of wiping and a small number of sheets so as to reduce the burden on the skin.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a milky lotion for wet wipes and a wet wipe. [Background technology]

[0002] BACKGROUND ART Wet wipes made of sheet materials such as nonwoven fabrics and paper impregnated with a medicinal solution have been known for use as baby wipes and adult body or bottom wipes (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5694660 Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the medicinal solution impregnated in the wet wipes of Patent Document 1 is primarily composed of water, it is not very effective at wiping away oily feces and sebum from the bottom, making it necessary to use a large number of wet wipes. This puts a strain on the skin and can cause rough skin.

[0005] An object of the present invention is to provide a milky lotion for wet wipes and wet wipes that reduce the burden on the skin and allow dirt to be wiped away with fewer sheets of wet wipes. [Means for solving the problem]

[0006] In order to solve the above problems, the invention described in claim 1 is as follows: A wet wipe emulsion containing an oil agent, an emulsifier, and a thickener, The oil is blended in an amount of 0.001% by mass to 0.100% by mass, The ratio of the oil agent to the emulsifier is 1:5 to 1:19, The thickener comprises at least Three times the amount of the oil It is characterized by being blended.

[0007] The invention described in claim 2 is A wet wipe emulsion containing an oil agent, an emulsifier, and a thickener, The oil is blended in an amount of 0.001% by mass to 0.100% by mass, The ratio of the oil to the emulsifier is 1: 11 ~1:19, The thickener is At least twice the amount of the oil It is characterized by being blended.

[0008] The invention described in claim 3 is the emulsion for wet wipes described in claim 1 or 2, The emulsifier is characterized in that at least two types are used.

[0009] The invention described in claim 4 is a wet wipe, The wet wipe emulsion according to any one of claims 1 to 3 is impregnated into a base sheet.

[0010] The invention described in claim 5 is the wet wipe described in claim 4, The base sheet is characterized in that a predetermined pattern is formed by areas with different fiber densities.

[0011] The invention described in claim 6 is the wet wipe according to claim 4 or 5, The base sheet is characterized in that the emulsion for wet wipes is impregnated in an amount of 200% by mass to 500% by mass relative to the dry mass of the base sheet. [Effects of the Invention]

[0012] According to the present invention, a milky lotion for wet wipes and wet wipes that reduce the burden on the skin and allow dirt to be wiped away with fewer sheets of wet wipes can be obtained. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a plan view showing a herringbone pattern wet wipe. [Figure 2] FIG. 1 is a plan view showing a striped wet wipe. [Figure 3] FIG. 1 is a plan view showing a wet wipe with a checkered pattern. [Figure 4] FIG. 1 is a plan view showing a mesh-patterned wet wipe. [Figure 5] FIG. 1 is a plan view showing a wet wipe with a curved pattern. [Figure 6] FIG. 1 is a plan view showing a dotted wet wipe. [Figure 7] FIG. 1 is a plan view showing an Aran pattern (cable pattern) wet wipe. [Figure 8] FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIGS. 1 to 7. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the emulsion for wet wipes and wet wipes according to the present invention will be described in detail with reference to the drawings. However, although the embodiments described below are subject to various limitations that are technically preferable for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0015] [Wet wipes] FIG. 1 is a plan view showing a wet wipe S according to this embodiment. The wet wipes S are made by impregnating a base sheet 10 made of a specified fiber with a wet wipe emulsion made of purified water with various ingredients added, and are cleaning sheets used, for example, as baby wipes or adult body or bottom wipes. In the product form, the wet wipes S can be housed in a packaging means such as a sealed container having a sheet dispensing opening that can be sealed with an opening / closing lid. When using, the wet wipes S are placed directly in a container or bag, or the bag containing the wet wipes S is placed in a container, and the user opens the outlet and pulls out the sheet inside.

[0016] [Base sheet] The base sheet 10 is a nonwoven fabric manufactured using a known technique such as spunlace, air-through, air-laid, point-bonded, spunbonded, or needle-punched using predetermined fibers as the fiber material. Examples of predetermined fibers include cellulose fibers such as rayon, lyocell, Tencel, and cotton; polyolefin fibers such as polyethylene, polypropylene, and polyvinyl alcohol; polyester fibers such as polyethylene terephthalate and polybutylene terephthalate; and polyamide fibers such as nylon. These fibers can be used alone or in combination of two or more types, but it is preferable that the cotton content be 1% to 10% by mass. The inclusion of cotton can make the emulsion-impregnated wet wipes S less irritating to the skin.

[0017] The wet wipes S may be formed by plying (laminating) multiple substrate sheets 10, or may be formed from a single substrate sheet 10. When the wet wipes S have a multi-layer structure, the chemical solution retention can be improved by containing 6% to 10% cotton in the inner layer and 0% to 4% cotton in the outer layer, while the user will feel more moisturized if the inner layer contains 0% to 4% cotton and the outer layer contains 6% to 10% cotton. The cotton content ratio in the inner and outer layers is not limited to the above, and each layer may contain cotton at a uniform ratio. The base sheet 10 may also be made of paper.

[0018] As shown in FIG. 1, the base sheet 10 has, for example, convex portions consisting of high fiber density regions 11 and concave portions consisting of low fiber density regions 12, and the high fiber density regions 11 and the low fiber density regions 12 are arranged alternately to form a predetermined pattern. An example of the predetermined pattern is a herringbone pattern, as shown in FIG. 1, in which continuous V-shaped portions are formed by lines that bend in opposite directions at predetermined intervals. The angle of the V-shaped portions of the herringbone pattern (the angle at which the lines are bent) is not particularly limited, but for example, an angle of 5° to 60° can maximize emulsion diffusibility and liquid permeability.

[0019] In addition to the herringbone pattern, other patterns such as striped patterns, lattice patterns, mesh patterns, curved patterns, dotted patterns, and Aran patterns (cable patterns) can also be used as patterns formed on the base sheet 10. Figures 2 to 7 show base sheets 10 on which a striped pattern (Figure 2), a lattice pattern (Figure 3), a mesh pattern (Figure 4), a curved pattern (Figure 5), a dotted pattern (Figure 6), and an Aran pattern (Figure 7) are formed, respectively. The spacing between stripes and curves in each pattern, the size of the grid, mesh, and dots, etc. are not particularly limited.

[0020] 1 to 7, for ease of explanation, the high fiber density region 11 is dotted. Furthermore, the term "high fiber density region 11" as used herein means a region having a higher fiber density than the low fiber density region 12, and the density is not particularly limited as long as it is higher than the low fiber density region 12. The "low fiber density region 12" means a region having a lower fiber density than the high fiber density region 11, and the density is not particularly limited as long as it is lower than the high fiber density region 11.

[0021] The base sheet 10 has high fiber density regions 11 and low fiber density regions 12, which reduces the contact area with the skin and reduces friction on the skin. This reduces irritation to the skin, making the wet wipes S of the present invention suitable for use by people with sensitive skin and infants. Furthermore, by having the recesses (low fiber density regions 12), the base sheet has superior liquid diffusibility and liquid permeability compared to a flat base sheet, so that the emulsion can be applied evenly and without unevenness to the base sheet 10.

[0022] The number of alternating concaves and convexes in each pattern formed by the high fiber density regions 11 (convex portions) and the low fiber density regions 12 (concave portions) is preferably 3 to 7 per cm. Here, the number of alternating concave-convex regions (pieces / cm, lines / cm) in this specification means the number of linear (or dotted) high fiber density regions 11 and linear (or dotted) low fiber density regions 12 present per cm. For example, it means how many high fiber density regions 11 and how many low fiber density regions 12 are present in a direction perpendicular to the linear high fiber density regions 11 and linear low fiber density regions 12 arranged in parallel (the direction in which the number of irregularities is greatest). In other words, 4 pieces / cm means that two high fiber density regions 11 and two low fiber density regions 12 are provided per cm. If the number of alternating irregularities is less than 3 / cm, the surface of the base sheet 10 becomes nearly flat, making it easier for dirt that has been captured to transfer. If the number of alternating irregularities exceeds 7 / cm, the volume of the space formed by the high fiber density region 11 and the low fiber density region 12 becomes too small, making it impossible to secure a desired amount of dirt in the low fiber density region 12.

[0023] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIGS. The height (thickness) Hm of the high fiber density region 11 from the back surface is preferably, for example, 200 μm or more and less than 600 μm, and the height (thickness) Hd of the low fiber density region 12 from the back surface is preferably, for example, 150 μm or more and less than 200 μm. In this case, the difference in height between the high fiber density region 11 and the low fiber density region 12 is preferably about 50 μm to 100 μm. If the height difference is less than 50 μm, the capturing effect of the low fiber density region 12 cannot be expected to be significant, and the desired wiping amount cannot be secured; if it exceeds 100 μm, the thickness of the base sheet 10 becomes too thick, and flexibility and feel are impaired.

[0024] The fiber weight of the high fiber density region 11 is, for example, 40 g / m2 ~80g / m 2 The fiber weight of the low fiber density region 12 is preferably about 10 g / m 2 ~30g / m 2 It is preferable that the degree of The fiber weight of the base sheet 10 is, for example, 45 g / m 2 ~70g / m 2 It is preferable that the degree of When the fiber basis weight is within the above range, the thickness becomes suitable, and the base sheet 10 can be made to have both strength and flexibility.

[0025] In this embodiment, the convex portions are high fiber density regions 11 and the concave portions are low fiber density regions 12, but this is not limited to this, and the convex portions may be low fiber density regions 12 and the concave portions may be high fiber density regions 11. Furthermore, the base sheet 10 preferably has convex portions which are high fiber density regions 11 and concave portions which are low fiber density regions 12, but is not limited to this, and it is not necessary to provide a difference in fiber density. The area ratio of the high fiber density regions 11 to the low fiber density regions 12 in the base sheet 10 does not have to be 5:5, but is preferably within the range of 2:8 to 8:2. If one region is provided more than four times the other, it is not preferable because the uneven texture is less noticeable.

[0026] [Wet wipe emulsion] The emulsion for wet wipes is made by emulsifying water (purified water) as the main ingredient, with an oil agent and an emulsifier mixed in a ratio of 1:5 to 1:19. Furthermore, a thickener is blended into the emulsion for wet wipes to increase the viscosity, and the thickener makes the emulsion thicker. With this configuration, the emulsion for wet wipes of this embodiment contains oil, which makes it effective at removing oily feces and sebum stains. In addition, the viscosity of the emulsion makes it smooth to wipe with and less likely to cause rough skin. Therefore, the emulsion-impregnated wet wipes S can thoroughly wipe away dirt with fewer sheets, allowing consumers to reduce the amount of baby wipes they purchase.In addition, the emulsion-impregnated wet wipes S provide a comfortable wiping experience and reduce the burden on the skin. In particular, by blending the oil and emulsifier in this ratio, the emulsion stability of the wet wipe emulsion is improved, the water and oil are solubilized, and the emulsion becomes translucent or transparent, making it easier to perform quality control such as checking for the presence of impurities in the liquid and measuring pH, thereby improving operability. In particular, by blending a thickener in this ratio, the viscosity of the thickened emulsion increases, making it easier for the emulsion to adhere to the skin, so that the emulsion that adheres to the skin can easily cling to dirt, making it easier to remove the dirt. The emulsion for wet wipes is adjusted to a pH of 3 to 5.

[0027] (oil) As an oil, for example, shea butter is used, which contains a large amount of oleic acid and stearic acid, and therefore has low viscosity, a smooth and moist feel, excellent penetration, and high moisturizing properties due to the inclusion of long-chain fatty acids and phytosterols. The oil is not limited to shea butter, and any oil having an emollient effect may be used, including avocado oil, almond oil, olive oil, camellia oil, sesame oil, rice bran oil, safflower oil, soybean oil, corn oil, rapeseed oil, apricot kernel oil, persic oil, peach kernel oil, castor oil, sunflower oil, grape seed oil, cottonseed oil, coconut oil, wheat germ oil, rice germ oil, evening primrose oil, hybrid sunflower oil, macadamia nut oil, meadowfoam oil, hazelnut oil, palm kernel oil, palm oil, coconut oil, and cocoa. Fat, Japan wax, mink oil, turtle oil, egg yolk oil, beef tallow, milk fat, lard, horse oil, jojoba oil, carnauba wax, candela wax, rice bran wax, orange roughy oil, beeswax, shellac, lanolin, montan wax, squalene, squalane, liquid paraffin, paraffin, microcrystalline wax, petrolatum, soft liquid isoparaffin, hydrogenated polyisobutylene, ozokerite, ceresin, α-olefin oligomer, polybutene, polyethylene, and the like can be used as desired. The oil is blended in a proportion of 0.001% to 0.100% by mass of all ingredients in the emulsion for wet wipes. If the amount is less than 0.001% by mass, the effect of the oil is not fully exerted, which is undesirable. On the other hand, if the amount is more than 0.100% by mass, the viscosity increases, causing stickiness and a poor feel when used, which is undesirable.

[0028] (emulsifier) As the emulsifier, nonionic surfactants such as polyoxyalkylene alkyl ethers, polyoxyalkylene alkylphenyl ethers, polyoxyalkylene alkyl esters, polyoxyalkylene sorbitan alkyl esters, sorbitan alkyl esters, polyethylene glycol, polypropylene glycol, etc. are used. It is desirable to blend at least two or more types of emulsifiers. Since fats and oils such as shea butter are composed of multiple types of fatty acids, blending multiple types of emulsifiers can make them easier to emulsify.

[0029] (thickener) As thickeners, polysaccharides with branched structures such as xanthan gum, guar gum, gum arabic, and tara gum are used. The thickener is not limited to polysaccharides, and chemically synthesized products such as carbomer and silicone may also be used. The thickener is blended in an amount of at least 0.01% by mass based on the total components of the emulsion for wet wipes. Furthermore, depending on the thickener (e.g., xanthan gum), it is preferable to blend it in a proportion of 0.01% to 0.1% by mass of all components of the emulsion for wet wipes. If it is less than 0.01% by mass, the viscosity of the solution will be low, which is undesirable as it will not contribute to soil removal. If it is more than 0.1% by mass, the viscosity of the solution will be too high, which will make it difficult to uniformly impregnate the substrate sheet 10 (wet wipes S) with the solution, which is undesirable. In this way, an appropriate amount of thickener is blended depending on the type of thickener.

[0030] (moisturizer) The emulsion for wet wipes may also contain a moisturizing agent. Glycerin or the like, which is gentle on the skin, is used as the moisturizing agent. By blending this with an oil, the moisture retention of the wet wipes S can be improved, making it possible to wipe off dirt without rubbing repeatedly and reducing irritation to the skin. The moisturizer is blended in a ratio of 1% to 10% by mass of the total components of the emulsion for wet wipes. If it is less than 1% by mass, the moisturizing effect is not significantly improved, and if it is more than 10% by mass, the viscosity of the emulsion for wet wipes becomes too high, reducing the impregnation performance. It also becomes sticky, which is undesirable as it worsens the feel when used.

[0031] (preservatives) Additionally, the moisturizing lotion for wet wipes may contain hexylglycerin or ethylhexylglycerin as a preservative. Any of these preservatives may be used: commercially available products, chemically synthesized products, natural products derived from animals or plants, or those obtained by fermentation or genetic recombination. Hexylglycerin and ethylhexylglycerin have a broad antibacterial spectrum and are highly effective. Furthermore, hexylglycerin and ethylhexylglycerin have moisturizing properties, and their inclusion can enhance the moisture retention of wet wipes S.

[0032] Preservatives also include sodium benzoate, which is a substance that has antibacterial effects against, for example, mold, yeast, aerobic bacteria, and the like. Sodium benzoate exerts its preservative effect at a pH of 5 or less. In other words, if the pH of the emulsion for wet wipes exceeds 5, the preservative effect of sodium benzoate is almost lost. In addition, generally, if the pH is lower than 3, it becomes highly acidic, which can irritate the skin and cause rough skin. For this reason, it is desirable to adjust the pH of the emulsion for wet wipes to the range of 3 to 5.

[0033] Specifically, ethylhexylglycerin is blended in an amount of 0.05% by mass to 0.10% by mass and sodium benzoate is blended in an amount of 0.075% by mass to 0.100% by mass based on the total components of the emulsion for wet wipes. Alternatively, hexylglycerin is blended in an amount of 0.1% by mass to 0.5% by mass and sodium benzoate is blended in an amount of 0.05% by mass to 0.10% by mass relative to all components of the emulsion for wet wipes. By using such a compounding method, the preservative effect can be more effectively exhibited.

[0034] Other preservatives that can be added include, for example, phenoxyethanol, benzalkonium chloride, cetylpyridinium chloride, and chelating agents.

[0035] (Impregnation rate) The impregnation rate of the emulsion for wet wipes can be 200% by mass to 500% by mass relative to the dry mass of the base sheet 10. The dry mass of the base sheet 10 was measured under conditions of a temperature of 25°C and a humidity of 40%. An impregnation rate of 200% by mass means that 200 g of the emulsion for wet wipes is impregnated into a base sheet 10 with a dry mass of 100 g, and an impregnation rate of 500% by mass means that 500 g of the emulsion for wet wipes is impregnated into a base sheet 10 with a dry mass of 100 g. If the impregnation rate is less than 200% by mass, the liquid will not penetrate sufficiently, resulting in uneven impregnation and the ingredients in the emulsion for wet wipes will be more likely to be unevenly distributed, while if the impregnation rate is more than 500% by mass, the emulsion for wet wipes will be more likely to drip during use. [Example]

[0036] The present invention will be specifically explained below with reference to examples, but the present invention is not limited to these examples.

[0037] [Sample Creation] First, a base emulsion formulation (a drug solution that serves as the base of the emulsion, a base formulation liquid) was obtained using the ingredients and blending ratios shown in Table I.

[0038] [Table 1]

[0039] Next, the base formulation, oil (shea butter), nonionic surfactant emulsifier I (PEG-20 glyceryl triisostearate), emulsifier II (PEG-8 (caprylic / capric) glycerides), and thickener (xanthan gum) were mixed in the mixing ratios shown in the following Examples and Comparative Examples to prepare respective medicinal solutions (see Table II).

[0040] Example 1 The base formulation was blended at 99.77% by mass, oil at 0.01% by mass, emulsifier I at 0.02% by mass, emulsifier II at 0.03% by mass, thickener at 0.03% by mass, and purified water at 0.14% by mass. Example 2 The base formulation was blended at 99.77% by mass, oil at 0.01% by mass, emulsifier I at 0.05% by mass, emulsifier II at 0.06% by mass, thickener at 0.02% by mass, and purified water at 0.09% by mass. Example 3 The base formulation was blended at 99.77% by mass, oil at 0.01% by mass, emulsifier I at 0.05% by mass, emulsifier II at 0.06% by mass, thickener at 0.03% by mass, and purified water at 0.08% by mass. Example 4 The base formulation was blended at 99.77% by mass, oil at 0.01% by mass, emulsifier I at 0.09% by mass, emulsifier II at 0.10% by mass, thickener at 0.02% by mass, and purified water at 0.01% by mass. Example 5 The base formulation was blended at 99.77% by mass, oil at 0.01% by mass, emulsifier I at 0.09% by mass, emulsifier II at 0.10% by mass, and thickener at 0.03% by mass.

[0041] (Comparative Example 1) The base formulation was blended at 99.77% by mass, oil at 0.01% by mass, emulsifier I at 0.02% by mass, emulsifier II at 0.03% by mass, no thickener, and purified water at 0.17% by mass. (Comparative Example 2) The base formulation was blended at 99.77% by mass, oil at 0.01% by mass, emulsifier I at 0.02% by mass, emulsifier II at 0.03% by mass, thickener at 0.02% by mass, and purified water at 0.15% by mass. (Comparative Example 3) The base formulation was blended at 99.77% by mass, oil at 0.01% by mass, emulsifier I at 0.05% by mass, emulsifier II at 0.06% by mass, no thickener, and purified water at 0.11% by mass. Comparative Example 4 The base formulation was blended at 99.77% by mass, with no oil, no emulsifier I, no emulsifier II, 0.02% by mass of thickener, and 0.21% by mass of purified water. (Comparative Example 5) The base formulation was blended at 99.77% by mass, with no oil, no emulsifier I, no emulsifier II, no thickener, and 0.23% by mass of purified water.

[0042] Using the chemical solutions of Examples 1 to 5 and Comparative Examples 1 to 5, the following Tests 1 and 2 were carried out. The chemical solutions of Examples 1 to 5 and Comparative Examples 1 to 3 emulsified and became translucent or transparent in color. The liquid medicine of Comparative Example 4 was prepared by adding only a thickener to the base formulation, and the liquid medicine of Comparative Example 5 was prepared by adding purified water to the base formulation.

[0043] [Test 1. Dirt removal test] First, a sample was created for use as a baby wipe sheet. The sample substrate sheet has a fiber blend of rayon / PET=50 / 50, has the dot pattern shown in FIG. 6, and has a basis weight of 60 g / m 2 Nonwoven fabric was used. The base sheet was impregnated with 340% of each of the chemical solutions of Examples 1 to 5 and Comparative Examples 1 to 5 to prepare baby wipe sheet samples.

[0044] <Test Method> Artificial soil simulating loose feces was attached to the center of a 320 mm long polypropylene plate in two places aligned across the width of the plate, and the plate was dried at 60°C for 1 hour to prepare the attached soil. To simulate the dirt, a liquid made by mixing yogurt and ion-exchanged water in a 2:3 ratio was used, and 0.5 ml of the liquid was dropped into two places. A sample of the baby wipes sheet is placed on the right edge of the polypropylene plate, and a 275 g weight is placed on top of the sample. Then, the sample of the baby wipe sheet with the weight placed on it is moved to the left end of the polypropylene plate over a period of about 4 seconds, and then moved from the left end to the right end of the polypropylene plate over a period of about 4 seconds. This back and forth motion was repeated several times, and the state of the stain was observed after each motion. Based on this observation, items that removed the stains in 10 times or less were rated as "◎" (good stain removal), If the stain was removed after 11 to 15 washes, it was rated as "Good" (average stain removal). If the stain was removed after 16 to 20 washes, it was rated as "△" (slightly poor stain removal). The results were evaluated on a four-point scale, with those that removed the stain after 21 or more uses being rated "×" (poor stain removal). The results of this evaluation are shown in Table II.

[0045] [Table 2]

[0046] As shown in Table II, the results of the stain removal test showed that Examples 1 to 5 were rated good, while Comparative Examples 1 to 5 were rated poor. This shows that it is preferable that an appropriate amount of thickener is blended in an emulsion for wet wipes that contains an oil, an emulsifier, and a thickener. Specifically, an emulsion containing an oil agent and an emulsifier in a ratio of 1:5 to 1:19 and a thickener in an amount of 0.01% by mass to 0.1% by mass can effectively remove dirt. For example, when the ratio of oil to emulsifier is 1:5 to 1:19, the thickener is preferably blended in an amount about three times that of the oil. Furthermore, when the ratio of oil to emulsifier is 1:11 to 1:19, it is preferable that the thickener is blended in an amount about twice that of the oil. In other words, if the thickener is blended in the right amount and the lotion becomes thick, it will easily adhere to the area where dirt is attached, and the lotion that adheres to the area will easily cling to the dirt, making it easier to remove the dirt.

[0047] [Test 2. Quality test (water evaporation rate; skin irritation)] Skin was wiped with sheets impregnated with the medicinal solution of Example 5 and the medicinal solution of Comparative Example 5, and the amount of water evaporated from the skin was measured to examine skin irritation. The medicinal solution of Example 5 conforms to the formulation of the emulsion for wet wipes of this embodiment, and the medicinal solution of Comparative Example 5 conforms to the base formulation liquid containing no oil, emulsifier, or thickener. In this embodiment, a Moisture Checker MY707S (manufactured by Scalar Corporation) was used to measure the amount of water evaporation.

[0048] The measurement procedure is as follows. 1) Place marks on the inside of your left arm at 5cm, 8cm, and 11cm from your wrist. 2) Measure the amount of water evaporation at the marked area. This measurement value will be used as a blank to calculate the rate of change in water evaporation thereafter. 3) Gently wipe the marked area five times with the sample wipes. 4) Immediately after wiping, measure the amount of water evaporation from the marked area. 5) After that, measure the amount of water evaporation after 5, 10, 15, 20, 25, 30, 45, and 60 minutes. 6) Calculate the rate of change in water evaporation rate from before wiping. The results of this test are shown in Table III, which is the average value (n=3) of the three marks.

[0049] [Table 3]

[0050] As shown in Table III, there is no significant difference between Example 5 and Comparative Example 5 in terms of the amount of water evaporation. From this, it was determined that the drug solution of Example 5 and the drug solution of Comparative Example 5 had equivalent skin irritation.

[0051] (Effects of the embodiment) As described above, by blending the appropriate amounts of oil, emulsifier, and thickener into the chemical solution, it is possible to create an emulsion for wet wipes that can easily remove stains containing oil, such as feces or urine. In particular, an emulsion containing an oil and emulsifier in a ratio of 1:5 to 1:19 and a thickener in an amount of 0.01% by mass to 0.1% by mass can effectively remove dirt. If the thickener is blended in the right amount at this ratio, the thickened lotion will adhere more easily to the skin, and the lotion that adheres to the skin will be more likely to cling to dirt, making it easier to remove dirt. Furthermore, emulsions containing the appropriate amount of thickener at such a ratio do not irritate the skin and are therefore unlikely to cause rough skin. A wet wipe having a base sheet impregnated with such a wet wipe emulsion can effectively wipe away stains containing oil such as feces or urine. Furthermore, with this wet wipe, dirt can be thoroughly wiped away with fewer wipes and fewer sheets, reducing the burden on the skin.

[0052] [Variations] Furthermore, it goes without saying that other specific detailed structures and the like can be modified as appropriate. For example, the wet wipes S are intended to be used as baby wipes, adult body or diaper wipes, etc., but are not limited to these. The medicinal liquids blended into the emulsion for wet wipes can also be changed depending on the intended use. [Explanation of symbols]

[0053] 10 Base sheet S Wet Wipes

Claims

1. A wet sheet emulsion containing an oil agent, an emulsifier, and a thickener, The oil is blended in an amount of 0.001% by mass to 0.100% by mass, The ratio of the oil agent to the emulsifier is 1:5 to 1:19; The emulsion for wet sheets is characterized in that the thickener is blended in an amount at least three times that of the oil.

2. A wet sheet emulsion containing an oil agent, an emulsifier, and a thickener, The oil is blended in an amount of 0.001% by mass to 0.100% by mass, The ratio of the oil agent to the emulsifier is 1:11 to 1:19; The emulsion for wet sheets is characterized in that the thickener is blended in an amount at least twice as much as the oil.

3. 3. The emulsion for wet sheets according to claim 1, wherein at least two kinds of emulsifiers are used.

4. A wet wipe comprising a base sheet impregnated with the emulsion for wet wipes according to any one of claims 1 to 3.

5. The wet wipes according to claim 4, wherein the base sheet has a predetermined pattern formed by areas of different fiber densities.

6. 6. The wet wipes according to claim 4, wherein the emulsion for wet wipes is impregnated in an amount of 200% by mass to 500% by mass based on the dry mass of the base sheet.

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