Sheet products

Abstract

A sheet product, wherein the sheet product is formed by impregnating a sheet containing 5% by weight or more of hydrophobic fibers with the following liquid composition, wherein the liquid composition contains the following components (A), (B) and (C): (A) 0.5 to 9% by weight of a nonionic surfactant; (B) 0.05 to 3% by weight of an anionic surfactant having a Krafft point of 45° C. or more, converted into a salt; and (C) 70 to 99.45% by weight of water, wherein the mass ratio (B) / (A) of the component (B) converted into a salt relative to the mass of the component (A) is 0.03 to 1.0.

Description

Technical Field

[0001] The present invention relates to sheet products. Background Art

[0002] Skin cleansing sheets containing water-based cleansing agents are known. For example, Patent Document 1 describes a skin cleansing sheet comprising a water-based cleansing composition containing a nonionic surfactant, a polyol and / or a glycol ether, and an oil component in a specific nonwoven fabric.

[0003] (Patent Document 1) Japanese Patent Application Publication No. 2001-314342 Summary of the invention

[0004] The present invention relates to a sheet product, wherein the sheet product is formed by impregnating a sheet containing 5% by mass or more of hydrophobic fibers with the following liquid composition, wherein the liquid composition contains the following components (A), (B) and (C):

[0005] (A) nonionic surfactant, 0.5 to 9% by weight;

[0006] (B) an anionic surfactant having a Krafft point of 45°C or higher, in an amount of 0.05 to 3% by mass as salt;

[0007] (C) water, 70 to 99.45% by mass,

[0008] The ratio (B) / (A) of the mass of the component (B) in terms of salt relative to the mass of the component (A) is 0.03 to 1.0. DETAILED DESCRIPTION

[0009] The cleaning power of existing skin cleansing sheets mainly depends on the cleaning power of the water-based cleansing agent itself. Therefore, when removing dirt (such as makeup) from the skin, the dirt that has floated on the skin due to the cleaning power of the water-based cleansing agent will return to the skin (dirt reattachment), resulting in a technical problem that the high cleaning power cannot be exerted.

[0010] The present invention relates to a sheet product which ensures the cleaning power of a water-based cleaning agent and suppresses the re-adhesion of dirt.

[0011] The present inventors have found that by impregnating a sheet with a liquid composition containing a nonionic surfactant and a specific anionic surfactant in a specific ratio, dirt such as makeup can be removed from the skin and re-attachment of dirt can be suppressed, thereby obtaining a sheet product with high cleansing power.

[0012] The sheet product of the present invention can remove skin dirt such as makeup from the skin and inhibit the re-adhesion of dirt, thereby exerting a high cleaning power. In addition, it can inhibit the stickiness or residual feeling on the skin after use.

[0013] In the present invention, the nonionic surfactant as component (A) used in the liquid composition may be any one used in a conventional detergent, and examples thereof include: sorbitan fatty acid esters such as sorbitan monostearate; polyglycerol fatty acid esters such as glycerol fatty acid esters and polyglycerol monoisostearate; polyoxyethylene fatty acid esters such as propylene glycol fatty acid esters and polyethylene glycol monolaurate; sucrose fatty acid esters; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monostearate, and polyoxyethylene coconut oil fatty acid sorbitan; polyoxyethylene alkyl ethers; polyoxyethylene sorbitan fatty acid esters; polyoxyethylene glycerol fatty acid esters; polyoxyethylene propylene glycol fatty acid esters; polyoxyethylene castor oil; polyoxyethylene hydrogenated castor oil; polyoxyethylene hydrogenated castor oil fatty acid esters; alkyl polyglucosides; polyoxyalkylene-modified silicones such as polyoxyethylene methylpolysiloxane copolymers, and the like.

[0014] Among these nonionic surfactants, polyoxyethylene fatty acid esters, polyoxyethylene glycerol fatty acid esters, polyoxyethylene alkyl ethers, polyglycerol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sucrose fatty acid esters, and alkyl polyglucosides are preferred from the viewpoint of good cleaning performance for oily dirt and water-soluble dirt.

[0015] Component (A) can be used as one or two or more in combination. From the viewpoint of making dirt easily float from the skin, the content of component (A) in the liquid composition is 0.5% by mass or more, preferably 1.5% by mass or more, and more preferably 2.5% by mass or more. In addition, from the viewpoint of inhibiting the re-attachment of dirt and inhibiting the stickiness of the skin after wiping, it is 9% by mass or less, preferably 7.5% by mass or less, and more preferably 5% by mass or less. In addition, the content of component (A) in the liquid composition is 0.5 to 9% by mass, preferably 1.5 to 7.5% by mass, and more preferably 2.5 to 5% by mass.

[0016] The anionic surfactant of the component (B) used in the liquid composition has a Krafft point of 45° C. or higher.

[0017] The nonionic surfactant of component (A) acts on dirt to make it float from the skin, while the concentration of component (A) in the liquid composition is reduced. At this time, the anionic surfactant of component (B) dissolved or finely dispersed in the liquid composition will precipitate on the surface of the above-mentioned floating dirt because it has a Krafft point of more than 45°C and low water solubility. As a result, the aggregation of the floating dirt is promoted, and the dirt can be inhibited from being dispersed in the liquid composition. As a result, since the dirt is easily adsorbed (or rolled into) the sheet, it is not easy to disperse in the liquid composition, and the dirt can be inhibited from returning to the skin (re-dispersed in the liquid to return and re-attach to the skin). In addition, since the dirt is not easy to move to the back of the sheet, the dirt is not easy to move to the back. The above effects are derived from the composition of the liquid composition and can be obtained regardless of the structure or composition of the sheet. At this time, if the sheet contains hydrophobic fibers, it will promote the adsorption of dirt and the effect will increase.

[0018] In the present invention, the Krafft point is used from the perspective of the melting point of the hydrated solid of the surfactant. That is, the temperature at which the surfactant precipitates when the aqueous solution is cooled. The Krafft point varies depending on the type of surfactant and the concentration, but the present invention uses an anionic surfactant having a Krafft point of 45° C. or higher at a concentration of 10% by mass in the aqueous solution. The Krafft point can be measured using a differential scanning calorimeter.

[0019] The anionic surfactant is not limited as long as it has a Krafft point of 45°C or higher at a concentration of 10% by mass in an aqueous solution and is an anionic surfactant used in common skin cleansers and cosmetics, and examples thereof include polyoxyalkylene alkyl (or alkenyl) ether sulfates, alkyl (or alkenyl) sulfates, alkyl sulfonates, ether carboxylates, amide ether carboxylates, higher fatty acid salts, alkyl phosphate ester salts, N-acylamino acid salts, acylated isethionates, acylated taurates, N-alkylamide alkanol sulfate ester salts, polyoxyalkylene fatty acid amide ether sulfates, etc. Among these, higher fatty acid salts (e.g., sodium salts having 14 or more carbon atoms, potassium salts having 18 or more carbon atoms), N-acylamino acid salts (e.g., sodium salts or potassium salts having 12 or more carbon atoms) are preferred from the viewpoint of skin smoothness after wiping, and sodium stearate, sodium N-stearoyl-N-methyl taurine, and monosodium N-stearoyl glutamate are more preferred.

[0020] Component (B) can be used as one or two or more in combination, and the content of component (B) converted into salt is 0.05% by mass or more in the liquid composition from the viewpoint of suppressing the reattachment of dirt, preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and from the viewpoint of suppressing the residual feeling of the skin after wiping, it is 3% by mass or less, more preferably 2.7% by mass or less, more preferably 1.5% by mass or less, and further preferably 1% by mass or less. In addition, the content of component (B) converted into salt is 0.05-3% by mass in the liquid composition, preferably 0.1-2.7% by mass, more preferably 0.2-1.5% by mass, and further preferably 0.2-1% by mass.

[0021] In the liquid composition, the ratio (B) / (A) of the mass of the component (B) converted into salt relative to the mass of the component (A) is 0.03 or more, preferably 0.04 or more, and more preferably 0.06 or more from the viewpoint of suppressing the re-adhesion of dirt, and is 1.0 or less, preferably 0.6 or less, more preferably 0.45 or less, and more preferably 0.3 or less from the viewpoint of suppressing the residual feeling on the skin after wiping. In addition, the ratio (B) / (A) of the mass of the component (B) converted into salt relative to the mass of the component (A) is 0.03 to 1.0, more preferably 0.04 to 0.6, more preferably 0.06 to 0.45, and more preferably 0.06 to 0.3.

[0022] In the liquid composition, the component (C) water functions as a solvent for dissolving other components.

[0023] The content of component (C) is 70% by mass or more, preferably 75% by mass or more, more preferably 80% by mass or more, and 99.45% by mass or less, preferably 98% by mass or less, and more preferably 97% by mass or less in terms of good dirt removal and refreshing touch. In addition, the content of component (C) is 70 to 99.45% by mass, preferably 75 to 98% by mass, and more preferably 80 to 97% by mass in the liquid composition.

[0024] The liquid composition may further contain a water-soluble polymer as component (D). By concentrating the water-soluble polymer of component (D) on the surface of the sheet, the adhesion of the sheet product to the skin can be improved, and the close contact between the skin and the liquid composition can be increased. As a result, even if the amount of nonionic surfactant of component (A) in the liquid composition is the same, the ability to remove dirt on the skin (makeup removal) can still be improved. In addition, by increasing the viscosity of the liquid composition, the friction of the sheet product on the skin can be reduced, and the skin touch can be improved. In addition, by adjusting the evaporation rate of water, the moist feeling after continuous wiping can be achieved.

[0025] Examples of the water-soluble polymer of the component (D) include acrylic acid / alkyl (meth)acrylate copolymers such as acrylic acid / alkyl acrylate cross-linked polymers and cellulose to which a hydroxyalkyl group is added.

[0026] As the acrylic acid / alkyl (meth)acrylate copolymer, commercially available products such as PEMULEN TR-1, PEMULEN TR-2, CARBOPOL ETD2020, CARBOPOL 1382, and CARBOPOL 1342 (all manufactured by Lubrizol Advanced Materials) and AQUPEC HV-501ER (manufactured by Sumitomo Seika Chemicals Co., Ltd.) can be used.

[0027] Examples of the cellulose to which a hydroxyalkyl group is added include hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, etc. For example, commercially available products such as NISSO HPC (manufactured by Nippon Soda Co., Ltd.) can be used as hydroxypropyl cellulose.

[0028] From the viewpoint of suppressing the re-adhesion of dirt, the water-soluble polymer of component (D) is preferably a water-soluble polymer having an alkyl group having 3 or more carbon atoms, for example, a water-soluble polymer having a propyl group, an isopropyl group, a butyl group or the like.

[0029] Component (D) can be used as one or more, and the content of component (D) is preferably 0.01% by mass or more in the liquid composition from the viewpoint of skin cleansing power, skin touch feeling improvement, and continuous moist feeling after wiping, more preferably 0.03% by mass or more, and more preferably 0.05% by mass or more, and in addition, from the viewpoint of suppressing the stickiness of the skin after wiping, preferably 0.3% by mass or less, more preferably 0.25% by mass or less, and more preferably 0.2% by mass or less. In addition, the content of component (D) is preferably 0.01-0.3% by mass in the liquid composition, more preferably 0.03-0.25% by mass, and more preferably 0.05-0.2% by mass.

[0030] The viscosity of the liquid composition containing component (D) at 30°C is preferably 5 mPa·s or more from the viewpoint of skin cleansing power and improved skin feel, and is preferably 150 mPa·s or less from the viewpoint of good impregnation of the liquid composition into the sheet.

[0031] The 30° C. viscosity of the present invention is measured at 30° C. using a digital viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd., rotor No. 2, 60 rpm).

[0032] The liquid composition may further contain a powder as a component (E). By containing the component (E), the stickiness after wiping can be further reduced, and a refreshing touch can be given to the skin.

[0033] As the powder of the component (E), any powder generally used in cosmetics can be used.

[0034] Among the powders, examples of inorganic powders include talc, anhydrous silicic acid (silicon dioxide), mica, kaolin, sericite, titanium oxide-coated mica (mica titanium), zinc oxide, titanium oxide, magnesium sulfate, magnesium carbonate, and the like.

[0035] Among these, from the viewpoint of reducing the sticky feeling after wiping and improving the refreshing touch of the skin, it is preferred to contain one or more selected from talc, titanium oxide, anhydrous silicic acid (silicon dioxide), mica, and kaolin, more preferably to contain one or more selected from talc, titanium oxide and anhydrous silicic acid (silicon dioxide), and even more preferably to contain one or two selected from talc and anhydrous silicic acid (silicon dioxide).

[0036] Examples of the organic powder include polymethyl methacrylate, polymethylsilsesquioxane, dimethylpolysiloxane polymer, (lauryl methacrylate / sodium methacrylate) crosslinked polymer, and aluminum starch octenylsuccinate.

[0037] Among these, from the viewpoint of reducing the sticky feeling after wiping and improving the refreshing touch of the skin, it is preferred to contain one or more selected from polymethylsilsesquioxane, dimethylpolysiloxane polymer and (lauryl methacrylate / sodium methacrylate) crosslinked polymer, and more preferably contain (lauryl methacrylate / sodium methacrylate) crosslinked polymer.

[0038] Component (E) can be used as one or more, or two or more, from the viewpoint of reducing the sticky feeling after wiping and giving the skin a refreshing touch, the content of component (E) is preferably 0.05% by mass or more in the liquid composition, more preferably 0.07% by mass or more, and further preferably 0.1% by mass or more, and from the viewpoint of suppressing the residual feeling on the skin, preferably 10% by mass or less, more preferably 9% by mass or less, and further preferably 7% by mass or less. In addition, the content of component (E) is preferably 0.05-10% by mass in the liquid composition, more preferably 0.07-9% by mass, and further preferably 0.1-7% by mass.

[0039] In addition to the above-mentioned ingredients, the liquid composition may also contain ingredients used in conventional skin cleansers, for example: surfactants other than the above-mentioned ingredients, oily ingredients, moisturizers, bactericides, alcohols, anti-inflammatory agents, preservatives, chelating agents, salts, pearlescent agents, fragrances, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts, etc.

[0040] Examples of the oily component include ester oil, silicone oil, hydrocarbon oil, etc. When the oily component is contained, the content of the oily component in the liquid composition (excluding component (A)) is preferably 18% by mass or less, more preferably 15% by mass or less, and further preferably 10% by mass or less from the viewpoint of suppressing the reattachment of dirt.

[0041] The liquid composition can be produced by common methods. For example, the components are weighed, mixed and stirred to produce the liquid composition. In this case, the liquid composition can be heated as needed. It is particularly preferred to heat the liquid composition to a temperature above the Krafft point of the component (B) to fully dissolve the component (B).

[0042] In the present invention, such a liquid composition can be used by impregnating the sheet.

[0043] The sheet material used in the present invention is not particularly limited, and a cloth-like sheet material containing natural fibers or synthetic fibers can be used, for example, any of woven fabrics, knitted fabrics, felt, and nonwoven fabrics can be used.

[0044] Examples of the natural fibers include cellulose fibers and the like.

[0045] As the sheet material for impregnation with the liquid composition, a nonwoven fabric is preferred from the viewpoints of conformability to a three-dimensional shape, improvement of the feeling of use, ease of processing, and the like.

[0046] As a method for producing the nonwoven fabric, for example, any method such as thermal fusion, spun bonding, hydro entanglement (spun lace) or the like can be adopted.

[0047] The sheet preferably contains hydrophobic fibers from the viewpoint of easily suppressing the re-adhesion of dirt and being able to release a large amount of impregnation liquid during wiping.

[0048] Examples of the hydrophobic fibers include polyolefin fibers such as polyethylene and polypropylene; polyester fibers such as polyethylene terephthalate; polyamide fibers such as nylon; and synthetic fibers such as polyacrylonitrile fibers, polyvinyl alcohol fibers, and polyurethane fibers.

[0049] Among these, from the viewpoint of cheapness, excellent commercial availability, preferably contain one or more than two kinds selected from polyolefin fibers and polyester fibers. In addition, also can use the fiber implemented heat fusion by various materials, also can use the composite fiber of core-sheath type, side-by-side type etc.

[0050] From the viewpoint of easily suppressing the re-adhesion of dirt and releasing a large amount of impregnation liquid during wiping, the sheet preferably contains 5% by mass or more of hydrophobic fibers, more preferably 10% by mass or more, and even more preferably 15% by mass or more.

[0051] Furthermore, from the viewpoint of reducing the friction feeling on the skin and improving the touch feeling on the skin, the sheet preferably contains hydrophilic fibers.

[0052] Examples of the hydrophilic fiber include cotton, rayon, and pulp.

[0053] Among these, it is preferred to contain one or two selected from cotton and rayon from the viewpoint of low price, good market availability, good skin adhesion, and improved skin feel. When cotton and rayon are used in combination, the mixing ratio can be arbitrary from the above viewpoint.

[0054] From the viewpoint of further reducing the friction feeling against the skin and further improving the touch feeling against the skin, the sheet preferably contains 10% by mass or more of the hydrophilic fiber, more preferably 30% by mass or more, and even more preferably 65% ​​by mass or more.

[0055] These hydrophobic fibers and hydrophilic fibers may be used alone or in combination of two or more.

[0056] When the sheet contains hydrophobic fibers and hydrophilic fibers, the mass ratio of hydrophobic fibers to hydrophilic fibers is preferably hydrophobic fibers / hydrophilic fibers = 5 / 95 to 70 / 30, and more preferably 15 / 85 to 35 / 65, from the viewpoint of inhibiting the re-adhesion of dirt, releasing a large amount of impregnated liquid when wiping, reducing skin friction, and improving skin touch.

[0057] From the viewpoint of releasing a large amount of impregnation liquid during wiping and reducing the friction on the skin caused by the sheet product, the density of the sheet is preferably 0.14 g / cm 3 Below, more preferably 0.12 g / cm 3 Below, more preferably 0.11 g / cm 3 In addition, from the viewpoint of making it easy for the liquid composition to be impregnated into the sheet and making the composition retain well in the sheet, the density of the sheet is preferably 0.08 g / cm 3 More preferably, 0.1 g / cm 3 above.

[0058] From the viewpoint of releasing a large amount of impregnation liquid during wiping and reducing the skin friction caused by the sheet product, the weight per square meter of the sheet is preferably 35 to 80 g / m 2 , more preferably 38 to 60 g / m 2 , more preferably 40 to 50 g / m 2 .

[0059] From the viewpoint of easy wiping and maintaining a good touch to the skin, the thickness of the sheet is preferably 0.3 to 0.6 mm, more preferably 0.35 to 0.55 mm, and even more preferably 0.38 to 0.5 mm.

[0060] In addition, the shape and size of the sheet are not particularly limited and can be appropriately set according to the purpose.

[0061] The sheet material may be a multilayer sheet material obtained by laminating two or more sheets of one or more sheets (of different compositions, etc.), and may be, for example, a laminate of woven fabrics, a laminate of nonwoven fabrics, a laminate of woven fabrics and nonwoven fabrics, etc. In this case, the weight per square meter and thickness may be the weight per square meter and thickness of the multilayer sheet material as a whole.

[0062] The sheet product of the present invention is a sheet product obtained by impregnating such a sheet with the above-mentioned liquid composition.

[0063] From the viewpoint of good touch when wiping, the impregnation rate of the liquid composition into the sheet is preferably 250 to 700% by mass, more preferably 300 to 600% by mass, based on the mass of the sheet.

[0064] The impregnation rate can be set as the impregnation rate by calculating the increase in the amount of the sheet material before impregnation with the liquid composition when the sheet material is impregnated with a certain amount of the liquid composition.

[0065] The method for impregnating the sheet with the liquid composition is not particularly limited, and examples thereof include a method of dripping or spraying the liquid composition on the sheet, a method of immersing the sheet in the liquid composition, etc. After being impregnated with the liquid composition, the composition is preferably packaged in an aluminum foil bag having excellent sealing properties to prevent the components from volatilizing.

[0066] The sheet impregnated with the liquid composition is suitable for use as a skin cleansing sheet, and can be used to clean skin dirt (e.g., makeup such as foundation, blush, eye shadow, or dirt such as solid fat in sebum). In particular, since it has a significant effect of inhibiting the re-adhesion of dirt, it is very suitable for removing makeup.

[0067] The skin cleansing sheet of the present invention can be used by, for example, pressing it against a part from which dirt such as makeup cosmetics is to be removed and then wiping it.

[0068] The advantage of a skin cleansing sheet (sheet makeup remover) for removing makeup cosmetics (hereinafter referred to as makeup) is the convenience of removing makeup at any time. On the other hand, "makeup removal" and "skin friction" are also technical problems. One of the major reasons is that the makeup that has been wiped off will be dispersed in the immersion liquid and return to the skin, resulting in the re-attachment of dirt (return to the skin). Because of the return to the skin, the dirt is not removed cleanly. Furthermore, repeated wiping also causes skin friction. The present invention realizes a sheet makeup remover that suppresses the return of dirt to the skin and can remove makeup even without repeated wiping, by using a new concept of allowing the sheet to absorb dirt. This is a technology that can solve the above two technical problems of sheet makeup removers such as "makeup removal" and "skin friction".

[0069] Regarding the above-mentioned embodiment, the present invention further discloses the following sheet products and the like.

[0070] <1> A sheet product, wherein the sheet product is formed by impregnating a sheet containing 5% by mass or more of hydrophobic fibers with the following liquid composition, wherein the liquid composition comprises the following components (A), (B) and (C):

[0071] (A) nonionic surfactant, 0.5 to 9% by weight;

[0072] (B) an anionic surfactant having a Krafft point of 45°C or higher, in an amount of 0.05 to 3% by mass as salt;

[0073] (C) water, 70 to 99.45% by mass,

[0074] The mass ratio (B) / (A) of the component (B) in terms of salt relative to the mass of the component (A) is 0.03 to 1.0.

[0075] <2> The sheet product as described in <1> above, wherein component (A) is preferably polyoxyethylene fatty acid ester, polyoxyethylene glycerol fatty acid ester, polyoxyethylene alkyl ether, polyglycerol fatty acid ester, polyoxyethylene sorbitan fatty acid ester, sucrose fatty acid ester, alkyl polyglucoside, and more preferably polyoxyethylene fatty acid ester and polyoxyethylene glycerol fatty acid ester.

[0076] <3> The sheet product according to <1> or <2> above, wherein the content of component (A) in the liquid composition is 1.5% by mass or more, preferably 2.5% by mass or more, preferably 7.5% by mass or less, and more preferably 5% by mass or less.

[0077] <4> The sheet according to any one of <1> to <3> above, wherein component (B) is preferably a higher fatty acid salt or an N-acylamino acid salt, and more preferably sodium stearate, sodium N-stearoyl-N-methyltaurine, or monosodium N-stearoyl glutamate.

[0078] <5> A sheet product as described in any one of <1> to <4> above, wherein the content of component (B) in the liquid composition is 0.1% by mass or more, preferably 0.2% by mass or more, preferably 2.7% by mass or less, more preferably 1.5% by mass or less, and further preferably 1% by mass or less.

[0079] <6> A sheet product as described in any one of <1> to <5> above, wherein in the liquid composition, the mass ratio (B) / (A) of component (B) converted into salt relative to the mass of component (A) is preferably 0.04 or more, more preferably 0.06 or more, preferably 0.6 or less, more preferably 0.45 or less, and further preferably 0.3 or less.

[0080] <7> A sheet product as described in any one of <1> to <6> above, wherein the content of component (C) in the liquid composition is preferably 75% by mass or more, more preferably 80% by mass or more, and preferably 98% by mass or less, more preferably 97% by mass or less.

[0081] <8> The sheet product according to any one of <1> to <7> above, wherein the liquid composition further contains (D) a water-soluble polymer.

[0082] <9> The sheet product according to <8> above, wherein component (D) is preferably an acrylic acid / alkyl (meth)acrylate copolymer or cellulose to which a hydroxyalkyl group is added, and more preferably an acrylic acid / alkyl (meth)acrylate copolymer or hydroxypropyl cellulose.

[0083] <10> The sheet product according to <8> or <9>, wherein the component (D) preferably has an alkyl group having 3 or more carbon atoms.

[0084] <11> A sheet product as described in any one of <8> to <10> above, wherein the content of component (D) in the liquid composition is 0.01% by mass or more, preferably 0.03% by mass or more, further preferably 0.05% by mass or more, preferably 0.3% by mass or less, more preferably 0.25% by mass or less, further preferably 0.2% by mass or less.

[0085] <12> The sheet product according to any one of <8> to <11>, wherein the liquid composition containing the component (D) has a viscosity at 30°C of 5 mPa·s or more and preferably 150 mPa·s or less.

[0086] <13> The sheet product according to any one of <1> to <12> above, wherein the liquid composition further contains (E) a powder.

[0087] <14> A sheet product as described in <13> above, wherein component (E) is preferably an inorganic powder, and more preferably contains one or more inorganic powders selected from talc, titanium oxide, anhydrous silicic acid (silicon dioxide), mica, and kaolin, and more preferably contains one or more inorganic powders selected from talc, titanium oxide, and anhydrous silicic acid (silicon dioxide), and further preferably contains one or two selected from talc and anhydrous silicic acid (silicon dioxide).

[0088] <15> A sheet product as described in <13> above, wherein component (E) is preferably an organic powder, more preferably an organic powder containing one or more selected from polymethylsilsesquioxane, dimethylpolysiloxane polymer and (lauryl methacrylate / Na methacrylate) cross-linked polymer, and more preferably an organic powder containing (lauryl methacrylate / Na methacrylate) cross-linked polymer.

[0089] <16> A sheet product as described in any one of <13> to <15> above, wherein the content of component (E) is preferably 0.05% by mass or more, more preferably 0.07% by mass or more, further preferably 0.1% by mass or more in the liquid composition, and is preferably 10% by mass or less, more preferably 9% by mass or less, further preferably 7% by mass or less.

[0090] <17> The sheet product according to any one of <1> to <16>, wherein the liquid composition further contains an oily component other than the component (A).

[0091] <18> The sheet product according to <17> above, wherein the content of the oily components other than component (A) in the liquid composition is preferably 18% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less.

[0092] <19> A sheet product as described in any one of <1> to <18> above, wherein the hydrophobic fiber is preferably a synthetic fiber selected from polyolefin fibers, polyester fibers, polyamide fibers, polyacrylonitrile fibers, polyvinyl alcohol fibers, and polyurethane fibers, and more preferably contains one or two selected from polyolefin fibers and polyester fibers.

[0093] <20> The sheet product according to any one of <1> to <19>, wherein the sheet preferably contains 10% by mass or more, more preferably 15% by mass or more, of the hydrophobic fiber.

[0094] <21> The sheet product according to any one of <1> to <20>, wherein the sheet preferably contains hydrophilic fibers.

[0095] <22> The sheet product according to <21> above, wherein the hydrophilic fiber is preferably one or two selected from cotton and rayon.

[0096] <23> The sheet product according to <21> or <22>, wherein the sheet preferably contains 10% by mass or more, more preferably 30% by mass or more, and even more preferably 65% ​​by mass or more of the hydrophilic fiber.

[0097] <24> A sheet product as described in any one of <1> to <23> above, wherein the sheet preferably contains hydrophobic fibers and hydrophilic fibers, and the mass ratio of hydrophobic fibers to hydrophilic fibers is preferably hydrophobic fibers / hydrophilic fibers = 5 / 95 to 70 / 30, more preferably 15 / 85 to 35 / 65.

[0098] <25> The sheet product according to any one of <1> to <24>, wherein the density of the sheet is preferably 0.14 g / cm 3 Below, more preferably 0.12 g / cm 3 Below, more preferably 0.11 g / cm 3 Below, preferably 0.08 g / cm 3 More preferably, 0.1 g / cm 3 above.

[0099] <26> The sheet product according to any one of <1> to <25>, wherein the weight per square meter of the sheet is preferably 35 to 80 g / m 2 , more preferably 38 to 60 g / m 2 , more preferably 40 to 50 g / m 2 .

[0100] <27> The sheet product according to any one of <1> to <26>, wherein the thickness of the sheet is preferably 0.3 to 0.6 mm, more preferably 0.35 to 0.55 mm, and even more preferably 0.38 to 0.5 mm.

[0101] <28> The sheet product according to any one of <1> to <27>, wherein the impregnation rate of the sheet with the liquid composition is preferably 250 to 700% by mass, more preferably 300 to 600% by mass, based on the mass of the sheet.

[0102] <29> The sheet product according to any one of <1> to <28>, wherein the sheet product is for skin cleansing.

[0103] <30> The sheet product according to any one of <1> to <29>, wherein the sheet product is for removing makeup cosmetics.

[0104] <31> The sheet product according to any one of <1> to <30>, wherein the sheet product is used by pressing against a part where dirt such as makeup cosmetics is to be removed and then wiping the part.

[0105] <32> A method for cleansing the skin, wherein the following sheet product is rubbed against the skin, the sheet product being obtained by impregnating the following liquid composition into a sheet containing 5% by mass or more of hydrophobic fibers, the liquid composition comprising the following components (A), (B) and (C):

[0106] (A) nonionic surfactant, 0.5 to 9% by weight;

[0107] (B) an anionic surfactant having a Krafft point of 45°C or higher, in an amount of 0.05 to 3% by mass as salt;

[0108] (C) water, 70 to 99.45% by mass,

[0109] The mass ratio (B) / (A) of the component (B) in terms of salt relative to the mass of the component (A) is 0.03 to 1.0.

[0110] <33> A method for cleansing the skin, comprising impregnating a sheet containing 5% by mass or more of hydrophobic fibers with the following liquid composition and wiping the sheet against the skin, wherein the liquid composition comprises the following components (A), (B) and (C):

[0111] (A) nonionic surfactant, 0.5 to 9% by weight;

[0112] (B) an anionic surfactant having a Krafft point of 45°C or higher, in an amount of 0.05 to 3% by mass as salt;

[0113] (C) water, 70 to 99.45% by mass,

[0114] The mass ratio (B) / (A) of the component (B) in terms of salt relative to the mass of the component (A) is 0.03 to 1.0.

[0115] <34> A skin cleansing method, comprising rubbing the sheet product according to any one of <1> to <31> against makeup cosmetics on the skin.

[0116] <35> Use of the sheet product according to any one of <1> to <31> as a skin cleansing sheet.

[0117] <36> Use of the sheet product according to any one of <1> to <31> as a make-up cosmetics removal sheet.

[0118] <37> A method for producing a skin cleansing sheet, comprising: preparing a liquid composition by mixing the following components (A), (B) and (C) so that the ratio (B) / (A) of the mass of the component (B) converted into a salt relative to the mass of the component (A) is 0.03 to 1.0, and impregnating the liquid composition into a sheet containing 5% by mass or more of a hydrophobic fiber.

[0119] (A) nonionic surfactant, 0.5 to 9% by weight;

[0120] (B) an anionic surfactant having a Krafft point of 45°C or higher, in an amount of 0.05 to 3% by mass as salt;

[0121] (C) Water, 70 to 99.45% by mass.

[0122] Example

[0123] Examples 1 to 23, Comparative Examples 1 to 5

[0124] Liquid compositions having the compositions shown in Tables 1 to 4 were prepared and impregnated into the nonwoven fabric sheets shown in Table 5 to produce skin cleansing sheets.

[0125] The obtained skin cleansing sheet was evaluated for dirt (makeup) removal, re-adhesion inhibition effect, and usability (skin feel, skin after use (no stickiness, no residual feeling)). The results are shown in Tables 1 to 4.

[0126] In addition, the density of the nonwoven fabric sheet was measured by the following method.

[0127] (Manufacturing method)

[0128] (1) Preparation of liquid composition:

[0129] The respective components (% by mass) were uniformly mixed and heated to a temperature equal to or higher than the Krafft point of the component (B) to prepare a liquid composition.

[0130] (2) Production of skin cleansing sheets:

[0131] A nonwoven fabric sheet cut in advance to 16 cm×20 cm was impregnated entirely with a predetermined amount of the liquid composition using a pipette to obtain a skin cleansing sheet.

[0132] (Evaluation method)

[0133] (1) Dirt (makeup) removal:

[0134] A certain amount of lipstick (Maybelline Color Sensational Lipstick (trademark) RD638, manufactured by L'Oreal Japan) was applied to the inner side of a person's forearm. After measuring the color difference (E1), each skin cleansing sheet was used to wipe the skin for a fixed number of times (3 times) at a fixed pressure. Then, the color difference (E2) was measured again. The cleaning rate was calculated by the following formula using the measured color difference (E1, E2), and evaluated according to the following criteria.

[0135] Cleaning rate (%) = (1-E2 / E1) × 100

[0136] In addition, the color difference was measured using a MINOLTA colorimeter CR-300 (manufactured by Konica Minolta).

[0137] 1: Cleaning rate is less than 30%;

[0138] 2: The cleaning rate is above 30% and below 40%;

[0139] 3: The cleaning rate is above 40% and below 50%;

[0140] 4: The cleaning rate is above 50% and below 60%;

[0141] 5: The cleaning rate is more than 60%.

[0142] (2) Inhibition of reattachment effect:

[0143] On an artificial skin of 49 mm × 130 mm in size (BIOSKIN (trademark), manufactured by Beaulax, dry type), apply 10 mg of liquid foundation (Sofina Primavista (trademark) Pore / Color Uneven Cover c, manufactured by Kao Corporation) and dry for more than 1 hour. Use a skin cleansing sheet folded in four to wipe repeatedly 5 times, and let the wiped sheet surface (wiping surface) touch a clean pull-out paper towel (KIMTOWELS (trademark) white, manufactured by NIPPON PAPERCRECIA). The foundation attached to the paper towel is considered to be re-attached, and its degree of attachment is compared with the foundation attached to the wiping surface, and the re-attachment is visually evaluated according to the following criteria. It was found that the amount of foundation attached to the paper towel is directly proportional to the color of the liquid squeezed out of the skin cleansing sheet after wiping. The evaluation value is expressed as the average value of 5 professional reviewers (rounded off to the first decimal place).

[0144] 1: The amount of foundation on the paper towel is the same as the surface being wiped;

[0145] 2: Although the foundation adheres to the tissue, the wiped surface is only slightly larger;

[0146] 3: Although the foundation adheres to the tissue, more of it is on the wiped surface;

[0147] 4: Although the foundation adheres to the tissue, the wiped surface is obviously too large;

[0148] 5: The foundation barely clings to the tissue.

[0149] (3) Usability evaluation:

[0150] The skin cleansing sheet was folded in four and placed on the forearms of five professional panelists aged 20 to 40. After wiping the sheet over a length of 10 cm five times with a force of about 300 g, sensory evaluation was performed based on the following criteria: "skin feel", "skin after use (no stickiness)", and "skin after use (no residual feeling)". The evaluation value is the average of the five professional panelists (rounded off to the first decimal point).

[0151] (Skin feel)

[0152] 1: Poor skin smoothness and hard touch;

[0153] 2: The skin smoothness is slightly poor and the touch is slightly hard;

[0154] 3: Slightly better skin smoothness and slightly softer touch;

[0155] 4: Good skin smoothness and soft touch;

[0156] 5: The skin is very smooth and feels very soft.

[0157] (Skin after use (no stickiness))

[0158] 1: The skin feels strongly sticky;

[0159] 2: The skin feels slightly sticky;

[0160] 3: The skin feels slightly sticky;

[0161] 4: The skin hardly feels sticky;

[0162] 5: The skin does not feel sticky at all and feels refreshed.

[0163] (Skin after use (no residual feeling))

[0164] 1: The skin feels a strong residual feeling;

[0165] 2: The skin feels a slight residual sensation;

[0166] 3: The skin feels a slight residual feeling;

[0167] 4: The skin hardly feels any residue;

[0168] 5: The skin feels refreshed with no residue left.

[0169] (4) Density of non-woven fabric sheet:

[0170] The nonwoven sheet density is calculated by dividing the weight per square meter of the nonwoven sheet by the thickness of the nonwoven sheet.

[0171] The thickness of the nonwoven fabric sheet was measured at 5 random locations using a constant pressure thickness tester (S-10908, manufactured by TECLOCK) according to the "Thickness" test method A in the general short fiber nonwoven fabric test method (JIS L 1913), and the average value was calculated.

[0172]

[0173]

[0174]

[0175]

[0176] [Table 5]

[0177] Non-woven sheet Hydrophobic Fiber PET is used as the core, and then heat-fused with PE fibers Hydrophilic fiber Cotton / Rayon=75 / 25 Hydrophobicity / Hydrophilicity Ratio 20 / 80 <![CDATA[Grammage g / cm per square meter 2 > 45 Thickness mm 0.42 <![CDATA[Density g / cm 3 > 0.11 Impregnation rate% 450

[0178] [Examples 24 to 29, Comparative Examples 6 to 7]

[0179] In the same manner as in Examples 1 to 23, the liquid composition of Example 4 was impregnated into the nonwoven fabric sheets shown in Table 6 to produce skin cleansing sheets.

[0180] The obtained skin cleansing sheet was evaluated for dirt (makeup) removal, re-adhesion inhibition effect, and usability (skin feel) in the same manner as in Examples 1 to 23. Liquid release was also evaluated. The results are shown in Table 6.

[0181] (Evaluation method of liquid release)

[0182] A 49 mm x 130 mm artificial skin (BIOSKIN (trademark), manufactured by Beaulax, dry type) was folded in four and wiped in one direction with a specified load (300 to 400 g) without missing any part (in a manner that the wiped area does not overlap). The amount of liquid attached to the artificial skin was measured from the weight change of the artificial skin before and after wiping. The weight was evaluated according to the following criteria.

[0183] 1: The amount of attached liquid is less than 100 mg;

[0184] 2: The amount of attached liquid is more than 100 mg and less than 130 mg;

[0185] 3: The amount of attached liquid is more than 130mg and less than 150mg;

[0186] 4: The amount of attached liquid is more than 150 mg and less than 180 mg;

[0187] 5: The amount of attached liquid is 180 mg or more.

[0188]

[0189] [Formulation Example 1]

[0190] In the same manner as in Examples 1 to 23, a skin cleansing sheet was produced by impregnating the nonwoven fabric sheet shown in Table 5 with the liquid composition having the composition shown in Table 7.

[0191] The obtained skin cleansing sheet can remove skin dirt such as makeup from the skin and inhibit the dirt from reattaching, thereby exhibiting high cleansing power, and can inhibit the stickiness or residual feeling on the skin after use, and also has a good touch to the skin.

[0192] [Table 7]

[0193]

Claims

1. A sheet product, wherein: The sheet product is formed by impregnating the following liquid composition into a sheet containing 5% by mass or more of hydrophobic fibers, the liquid composition comprising the following components (A), (B) and (C): (A) nonionic surfactant, 0.5 to 9% by weight; (B) an anionic surfactant having a Krafft point of 45°C or higher, in an amount of 0.05 to 2.7% by mass as salt; (C) water, 70 to 99.45% by mass, Component (A) is one or more selected from the group consisting of polyoxyethylene fatty acid esters, polyoxyethylene glycerol fatty acid esters, polyoxyethylene alkyl ethers, polyglycerol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sucrose fatty acid esters, and alkyl polyglucosides, Component (B) is one or more selected from higher fatty acid salts and N-acylamino acid salts, The mass ratio (B) / (A) of the component (B) in terms of salt relative to the mass of the component (A) is 0.03 to 0.

54.

2. The sheet product according to claim 1, wherein Component (A) is one or more selected from polyoxyethylene (caprylic acid / capric acid) glyceride and polyethylene glycol monolaurate.

3. The sheet product according to claim 1 or 2, wherein: The content of the component (A) is 1.5% by mass or more in the liquid composition.

4. The sheet product according to claim 1 or 2, wherein: Component (B) is one or more selected from the group consisting of sodium stearate, sodium N-stearoyl-N-methyltaurate, and monosodium N-stearoyl glutamate.

5. The sheet product according to claim 1 or 2, wherein: Component (B) is one or more selected from the group consisting of sodium stearate and sodium N-stearoyl-N-methyltaurate.

6. The sheet product according to claim 1 or 2, wherein: In the liquid composition, the content of the component (B) is 0.1 to 2.7% by mass in terms of salt.

7. The sheet product according to claim 1 or 2, wherein: In the liquid composition, the ratio (B) / (A) of the mass of the component (B) converted into salt to the mass of the component (A) is 0.04 to 0.

54.

8. The sheet product according to claim 1 or 2, wherein: The liquid composition further contains (D) a water-soluble polymer.

9. The sheet product according to claim 8, wherein: The water-soluble polymer of the component (D) has an alkyl group having 3 or more carbon atoms.

10. The sheet product according to claim 8, wherein Component (D) is one or two selected from acrylic acid / alkyl (meth)acrylate copolymers and cellulose to which a hydroxyalkyl group is added.

11. The sheet product according to claim 8, wherein In the liquid composition, the content of the component (D) is 0.01 to 0.3% by mass.

12. The sheet product according to claim 8, wherein The 30° C. viscosity of the liquid composition containing the component (D) is 5 mPa·s or more and 150 mPa·s or less.

13. The sheet product according to claim 1 or 2, wherein: The liquid composition further contains (E) powder.

14. The sheet product according to claim 13, wherein: Component (E) contains one or more selected from the group consisting of talc, titanium oxide, anhydrous silicic acid, mica, and kaolin.

15. The sheet product according to claim 13, wherein: Component (E) contains one or more selected from the group consisting of polymethylsilsesquioxane, dimethylpolysiloxane polymer, and (lauryl methacrylate / sodium methacrylate) cross-linked polymer.

16. The sheet product of claim 13, wherein: The content of the component (E) is 0.05% by mass or more and 10% by mass or less in the liquid composition.

17. The sheet product according to claim 1 or 2, wherein: The liquid composition further contains an oily component other than the component (A).

18. The sheet product of claim 17, wherein: The content of the oily components other than the component (A) is 18% by mass or less in the liquid composition.

19. The sheet product according to claim 1 or 2, wherein: The hydrophobic fibers include one or more selected from the group consisting of polyolefin fibers, polyester fibers, polyamide fibers, polyacrylonitrile fibers, polyvinyl alcohol fibers, and polyurethane fibers.

20. The sheet product according to claim 1 or 2, wherein: The sheet material is a sheet material containing hydrophilic fibers.

21. The sheet product of claim 20, wherein: The hydrophilic fiber is one or two selected from cotton and rayon.

22. The sheet product of claim 20, wherein: The sheet contains 10% by mass or more of hydrophilic fibers.

23. The sheet product according to claim 1 or 2, wherein: The sheet contains hydrophobic fibers and hydrophilic fibers, and the mass ratio of the hydrophobic fibers to the hydrophilic fibers is hydrophobic fibers / hydrophilic fibers=5 / 95 to 70 / 30.

24. The sheet product according to claim 1 or 2, wherein: The density of the sheet is 0.14 g / cm 3 the following.

25. The sheet product according to claim 1 or 2, wherein: The sheet contains a nonwoven fabric.

26. The sheet product according to claim 1 or 2, wherein: The weight per square meter of the sheet is 35 to 80 g / m 2 .

27. The sheet product according to claim 1 or 2, wherein: The thickness of the sheet is 0.3-0.6 mm.

28. The sheet product according to claim 1 or 2, wherein: The impregnation rate of the liquid composition into the sheet is 250 to 700% by mass relative to the mass of the sheet.

29. A method for skin cleansing, wherein: The sheet product according to any one of claims 1 to 28 is rubbed against the skin.

30. A method for skin cleansing, wherein: The sheet product according to any one of claims 1 to 28 is applied to the skin and the makeup is rubbed on.

31. A method for skin cleansing, wherein: A sheet containing 5% by mass or more of hydrophobic fibers is impregnated with the following liquid composition and the sheet is rubbed against the skin, The liquid composition contains the following components (A), (B) and (C): (A) nonionic surfactant, 0.5 to 9% by weight; (B) an anionic surfactant having a Krafft point of 45°C or higher, in an amount of 0.05 to 2.7% by mass as salt; (C) water, 70 to 99.45% by mass, Component (A) is one or more selected from the group consisting of polyoxyethylene fatty acid esters, polyoxyethylene glycerol fatty acid esters, polyoxyethylene alkyl ethers, polyglycerol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sucrose fatty acid esters, and alkyl polyglucosides, Component (B) is one or more selected from higher fatty acid salts and N-acylamino acid salts, and The mass ratio (B) / (A) of the component (B) in terms of salt relative to the mass of the component (A) is 0.03 to 0.

54.

32. A method for producing a skin cleansing sheet, wherein: The following ingredients (A), (B) and (C) are mixed: (A) nonionic surfactant, 0.5 to 9% by weight; (B) an anionic surfactant having a Krafft point of 45°C or higher, in an amount of 0.05 to 2.7% by mass as salt; (C) water, 70 to 99.45% by mass, The liquid composition is prepared by mixing the component (B) in salt-converted form to the component (A) in a ratio (B) / (A) of 0.03 to 0.54, and the liquid composition is impregnated into a sheet containing 5% by mass or more of hydrophobic fibers. Component (A) is one or more selected from the group consisting of polyoxyethylene fatty acid esters, polyoxyethylene glycerol fatty acid esters, polyoxyethylene alkyl ethers, polyglycerol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sucrose fatty acid esters, and alkyl polyglucosides, Component (B) is one or more selected from higher fatty acid salts and N-acylamino acid salts.

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