Face masks and sheet-like substrates

Abstract

[Problem] To provide a novel face mask. [Solution] A face mask according to the present invention comprising a sheet-shaped base material configured so as to cover at least a part of the face of a user, and a cosmetic composition impregnated into the sheet-shaped base material, wherein: the sheet-shaped base material being provided with a nose cut section through which the nose of the user passes; a length L from the lowest part of the nose cut section to a lower side of the sheet-shaped base material is in a range of 80-100 mm; at the lower side of the sheet-shaped base material, the radius R1 of a curve of a portion intersecting a center perpendicular line of the sheet-shaped base material is in a range of 170-230 mm; and a stringing length of the cosmetic composition is 10 mm or more when the face mask is pulled and removed at a speed of 1200 mm / min.

Description

[Technical Field]

[0001] The present invention relates to a face mask, and more particularly to a face mask configured to cover at least a portion of the user's face, comprising a sheet-like substrate impregnated with a cosmetic composition. [Background technology]

[0002] Face masks, which cover the face for cosmetic purposes or to provide a sense of relaxation, are well known. These face masks are usually made by impregnating a sheet-like base material, molded into a mask shape, with a cosmetic composition, and are used by adhering them closely to the skin of the face. It is believed that by adhering the face mask closely to the face, the cosmetic composition impregnated in the base material can act on and / or penetrate the skin of the face. In order for the action and penetration of the cosmetic composition to be efficient, it is preferable that the face mask adheres closely to the user's face without lifting or falling off when worn. Furthermore, in recent years, there has been a demand for face masks that can cover up to the chin for the purpose of caring for the jawline, but the area under the chin is prone to peeling of the face mask due to facial movement during wear, so there is a demand for face masks that can prevent peeling even when worn for a certain period of time.

[0003] As a face mask that is less likely to peel off, for example, Patent Document 1 (JP 2004-209143 A) and Patent Document 2 (JP 2010-259621 A) propose a face mask that has notches for ear loops. Such face masks aim to prevent peeling from the face and under the chin after being attached to the face by providing ear loops. However, face masks with such ear loops have the problem that when worn, they come into contact with the user's hair and ears, and the cosmetic composition impregnated in the face mask adheres to unwanted areas such as the hair and ears, staining them. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2004-209143 [Patent Document 2] Japanese Patent Publication No. 2010-259621 [Overview of the project]

[0005] Under these circumstances, there is a need for a new type of face mask that can fit snugly to the user's face even without ear loops.

[0006] The present invention includes the following embodiments. [1] A sheet-like substrate configured to cover at least a portion of the user's face, A face mask comprising a cosmetic composition impregnated into the sheet-like substrate, The aforementioned sheet-like substrate is provided with a nose cutout through which the user's nose passes, The length L from the lowest part of the nose cutout to the lower edge of the sheet-like substrate is in the range of 80 to 100 mm. The radius R1 of the curve at the point where the lower edge of the sheet-like substrate intersects with the central perpendicular of the sheet-like substrate is in the range of 170 to 230 mm. The cosmetic composition is a face mask in which the length of the drawn thread is 10 mm or more when pulled apart at a speed of 1200 mm / min. [2] The face mask according to [1], further comprising a jawline portion located below the nose incision and consisting of a curve with a radius R2 in the range of 40 to 60 mm. [3] The face mask according to [2], wherein the gill area forms a continuous curve with the lower edge of the sheet-like substrate. [4] The cosmetic composition comprises 0.001 to 5% by weight of a thickener and 0.1 to 50% by weight of a humectant, based on the total weight of the cosmetic composition, as described in any of [1] to [3]. [5] The face mask according to any one of [1] to [4], wherein the sheet-like substrate comprises a mouth opening provided at a position corresponding to the user's mouth, and at least one eye opening provided at a position corresponding to the user's eyes or an eyelid portion configured to cover the user's eyelids.

[0007] [6] The face mask according to any one of [1] to [5], wherein the sheet-like substrate is made from a single flat sheet. [7] The face mask according to any one of [1] to [6], wherein the sheet-like substrate is configured not to come into contact with the user's ears. [8] The face mask according to any one of [1] to [7], wherein the sheet-like base material is made of a nonwoven fabric, a knitted fabric, or a woven fabric. [9] The sheet-like substrate includes a nonwoven fabric, the basis weight of which is 30 to 100 g / m². 2 A face mask as described in [8], which falls within the range of [8].

[10] A face mask according to any one of [1] to [9], wherein the cosmetic composition is impregnated in a ratio of 400 to 2000 parts by weight per 100 parts by weight of the sheet-like substrate.

[0008]

[11] Having a sheet-like substrate impregnated with a cosmetic composition, The cosmetic composition is a face mask in which the length of the drawn thread is 10 mm or more when pulled apart at a speed of 1200 mm / min.

[12] A sheet-like substrate for a face mask, It is configured to cover the user's face, It has a nose cutout through which the user's nose passes, The length L from the lowest part of the nose cutout to the lower edge of the sheet-like substrate is in the range of 80 to 100 mm. A sheet-like substrate, wherein the radius R1 of the curve at the point where the lower edge of the sheet-like substrate intersects with the central perpendicular of the sheet-like substrate is in the range of 170 to 230 mm.

[13] The sheet-like base material according to

[12] , having an ear part formed of a curve with a radius R2 in the range of 40 to 60 mm, located below the nose cut part.

[0009] According to the present invention, a new face mask that solves the above problems is provided.

Brief Description of Drawings

[0010] [Figure 1] It is a schematic plan view of the sheet-like base material used for the cosmetic liquid-impregnated face mask according to the first embodiment of the present invention. [Figure 2] It is a schematic view showing a state in which a cosmetic liquid-impregnated face mask configured using the sheet-like base material shown in FIG. 1 is worn. [Figure 3] It is a schematic plan view of the sheet-like base material used for the cosmetic liquid-impregnated face mask according to the second embodiment of the present invention. [Figure 4] It is a schematic plan view of the sheet-like base material used for the cosmetic liquid-impregnated face mask according to the third embodiment of the present invention. [Figure 5] It is a schematic plan view of the comparative sheet-like base material 30. [Figure 6] It is a schematic view showing a state in which a cosmetic liquid-impregnated face mask configured using the comparative sheet-like base material 30 shown in FIG. 5 is worn. [Figure 7] It is a schematic plan view of the comparative sheet-like base material 40. [Figure 8] It is a schematic view showing a state in which a cosmetic liquid-impregnated face mask configured using the comparative sheet-like base material 40 shown in FIG. 7 is worn.

Modes for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The dimensional ratios in the drawings are exaggerated for convenience of explanation and may differ from the actual ratios. The upper and lower limits of the numerical ranges described herein can be combined in any way. For example, if "A~B" and "C~D" are described, the ranges "A~D" and "C~B" are also included in the scope of the present invention as numerical ranges. Furthermore, unless otherwise specified, the numerical ranges "lower limit ~ upper limit" described herein mean greater than or equal to the lower limit and less than or equal to the upper limit. In this specification, all experiments were conducted at 25±3℃. In this specification, "%" refers to weight percentage unless otherwise specified.

[0012] One embodiment of the present invention relates to a face mask comprising a sheet-like substrate and a cosmetic composition impregnated in the sheet-like substrate (hereinafter also referred to as a "cosmetic liquid-impregnated face mask"). Another embodiment of the present invention relates to a sheet-like substrate used in a cosmetic liquid-impregnated face mask. The following describes each component of the cosmetic liquid-impregnated face mask according to this embodiment.

[0013] <Cosmetic composition> The cosmetic composition (external skin preparation) used in the cosmetic liquid-impregnated face mask according to this embodiment has a thread length of 10 mm or more. A cosmetic composition with a thread length of 10 mm or more has thread properties suitable for a cosmetic liquid-impregnated face mask. Thread properties refer to the property of stretching into a thread-like shape. If the thread length of the cosmetic composition is 10 mm or more, the adhesion between the cosmetic liquid-impregnated face mask and the skin is improved, and peeling or detachment of the cosmetic liquid-impregnated face mask when worn can be suppressed. In particular, even when the cosmetic liquid-impregnated face mask covers the user up to the chin, peeling of the face mask can be prevented. Furthermore, due to such excellent adhesion, the state of adhesion can be maintained well for a long period of time (preferably 15 minutes or more, more preferably 20 minutes or more, and even more preferably 30 minutes or more).

[0014] In this invention, the "thread length" of a cosmetic composition refers to the degree of its stringability and is defined as the thread length when the cosmetic composition is pulled apart at a speed of 1200 mm / min (in the direction of gravity) (the maximum thread length until the string breaks). Specifically, the thread length can be measured by the following method.

[0015] (Method for measuring string length (mm)) Step 1: Prepare container A (inner diameter 30 mm, volume 10 mL) and fill it with a sample of the cosmetic composition so that it is the same height as the rim of container A. Step 2: A stainless steel disc-shaped pressure-sensitive shaft (20 mm in diameter) is attached to the viscoelasticity measuring device. Container A, filled with the sample prepared in Step 1, is placed on the measuring platform of the viscoelasticity measuring device, and the lower surface of the pressure-sensitive shaft is brought into contact with the liquid surface of the sample. Step 3: Container A, filled with the sample, is lowered at a speed of 1200 mm / min to separate the sample, and the length of the string (the maximum length the sample stretches when pulled by the pressure-sensitive axis) (mm) generated between the sample and the pressure-sensitive axis is measured and recorded as the "string length (mm)".

[0016] The length of the strands of the cosmetic composition is preferably 12 mm or more, more preferably 13 mm or more, and even more preferably 14 mm or more, in order to further improve adhesion and suppress gaping in the face mask when worn. There is no particular upper limit to the length of the strands of the cosmetic composition, but from the viewpoint of production efficiency, it is preferably 30 mm or less, more preferably 25 mm or less, and even more preferably 22 mm or less. The length of the silk thread of the cosmetic composition is preferably 12 to 30 mm, more preferably 13 to 25 mm, and even more preferably 14 to 22 mm. In this specification, "mid-layer separation" refers to the state where the edges of the face mask adhere closely to the skin, while the portion away from these edges peels off the skin.

[0017] The components of the cosmetic composition are not particularly limited and can be any component having the above-mentioned string length. For example, various cosmetic components commonly used in skin cosmetic compositions, such as water, humectants, thickeners, oily components, surfactants, pH adjusters, chelating agents, preservatives, antioxidants, UV absorbers, pigments, dyes, and fragrances, can be appropriately blended.

[0018] The water content is not particularly limited, but for example, it may be 0-99% by weight, 1-95% by weight, 10-90% by weight, or 50-90% by weight relative to the total weight of the cosmetic composition. In other words, the cosmetic composition may or may not contain water depending on the formulation.

[0019] While there are no particular restrictions on the humectants, examples include polyhydric alcohols such as propylene glycol, dipropylene glycol, 1,3-propanediol, 1,3-butylene glycol, isopentyldiol, pentylene glycol, hexanediol, caprylyl glycol, glycerin, diglycerin, polyglycerin, polyethylene glycol, and polyoxyethylene methyl glucoside; sugars such as sorbitol, mannitol, glucose, xylitol, maltitol, and trehalose; amino acids such as arginine, proline, serine, lysine HCl, threonine, valine, leucine, histidine, alanine, glycine, and carnosine; sodium pyrrolidone carboxylate, betaine, urea, sodium lactate, plant extracts, and seaweed extracts. The humectants may be used individually or in combination of two or more types. A humectant is an ingredient that, when applied to the surface of the skin, provides and retains moisture in the skin. The content of the humectant is not particularly limited, but is preferably 0.1 to 50% by weight, more preferably 0.5 to 45% by weight, and even more preferably 1 to 40% by weight, based on the total weight of the cosmetic composition.

[0020] While there are no particular restrictions on the thickening agent, examples include natural polymers such as guar gum, carrageenan, xanthan gum, sodium hyaluronate, pullulan, agar, and alginate, as well as synthetic polymers such as hydroxyethylcellulose, hydroxymethylcellulose, carboxyvinyl polymer, polyacrylate, polyvinyl alcohol, high-polymer polyethylene glycol, and acrylic acid / alkyl methacrylate copolymer. The thickening agent may be used alone or in combination of two or more types. The amount of thickener is not particularly limited, but is preferably 0.001 to 5% by weight, more preferably 0.005 to 3% by weight, and even more preferably 0.01 to 2% by weight, based on the total weight of the cosmetic composition.

[0021] While there are no particular restrictions on the oily components, examples include oils and fats such as olive oil, shea butter, and grape seed oil; waxes such as jojoba oil; hydrocarbons such as squalane, liquid paraffin, petrolatum, and paraffin wax; esters such as octyldodecyl myristate, ethylhexyl palmitate, isopropyl myristate, and caprylic / capric triglyceride; higher alcohols such as cetyl alcohol and stearyl alcohol; and silicone oils. The oily components may be used individually or in combination of two or more types. Oily components may or may not be included in the cosmetic composition, depending on the type of cosmetic composition. If an oily component is included in the cosmetic composition, the amount of oily component is not particularly limited, but for example, it may be 0.01 to 50% by weight or 0.01 to 10% by weight of the total weight of the cosmetic composition.

[0022] The surfactant is not particularly limited, but examples include polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol tetra fatty acid esters, polyoxyethylene phytosterols, glycerin fatty acid esters, sorbitan fatty acid esters, polyglycerin fatty acid esters, sucrose fatty acid esters, lecithin, etc. The surfactant may be used alone or in combination of two or more types. The surfactant content is not particularly limited, but may be, for example, 0.05 to 10% by weight of the total weight of the cosmetic composition.

[0023] Examples of pH adjusters, though not particularly limited, include sodium hydroxide, potassium hydroxide, arginine, lactic acid, aminomethylpropanol, 2-amino-2-methyl-1,3-propanediol, diethanolamine, triethanolamine, malic acid, citric acid and its salts, phosphoric acid and its salts, etc. pH adjusters may be used individually or in combination of two or more types. The content of the pH adjuster is not particularly limited, but may be, for example, 0.01 to 5% by weight of the total weight of the cosmetic composition.

[0024] Examples of chelating agents, though not particularly limited, include disodium ethylenediaminetetraacetate, calcium disodium ethylenediaminetetraacetate, trisodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, sodium gluconate, and sodium citrate. Chelating agents may be used individually or in combination of two or more types. The chelating agent may or may not be included in the cosmetic composition, depending on the type of composition. If the cosmetic composition contains a chelating agent, the amount of the chelating agent is not particularly limited, but for example, it may be 0.005 to 5% by weight of the total weight of the cosmetic composition.

[0025] Examples of preservatives, though not particularly limited, include benzoic acid and its salts, para-hydroxybenzoic acid esters and their salts, phenoxyethanol, salicylic acid and its salts, isopropylmethylphenol, benzalkonium chloride, benzethonium chloride, cetylpyridinium chloride, chlorhexidine gluconate, zinc pyrithione, piroctone olamine, methylisothiazolinone, and hinokitiol. Preservatives may be used individually or in combination of two or more types. The amount of preservatives is not particularly limited, but may be, for example, 0.01 to 5% by weight of the total weight of the cosmetic composition.

[0026] Cosmetic compositions can be manufactured by mixing each component according to conventional methods.

[0027] The string length of a cosmetic composition can be adjusted to the above range by controlling the viscosity of the cosmetic composition and the type and amount of ingredients it contains. Generally, the string length of a cosmetic composition tends to increase as its viscosity increases, but the string length is influenced by the properties and dispersion state of the ingredients it contains, and in the case of emulsions, it is also influenced by the emulsion particle size and the composition of the oil and aqueous phases.

[0028] The viscosity of the cosmetic composition at approximately 25°C (25±3°C) is not particularly limited, as long as it is a value that facilitates obtaining the desired thread length without impairing the effects of the present invention. The upper limit of the viscosity of the cosmetic composition at approximately 25°C (25±3°C) is not particularly limited, but considering the impregnation properties of the mask, it may be, for example, 10,000 mPa·s or less. Furthermore, the lower limit of the viscosity of the cosmetic liquid is not particularly limited, and it may be an impermeable low viscosity (a viscosity lower than the minimum measurable viscosity of a B-type viscometer) as long as an appropriate thread length in the present invention is obtained (for example, a thread length of 10 mm or more when pulled apart at a speed of 1200 mm / min).

[0029] The pH of the cosmetic composition is set appropriately according to the type and content of the ingredients, the intended use, etc., and is not limited as long as it is within a physiologically or pharmaceutically acceptable range, but for example, it can be pH 2 to 10. The pH of the cosmetic composition is preferably 3 to 8, more preferably weakly acidic, and specifically preferably 3.5 or more and less than 7, even more preferably 4 or more and less than 7, and even more preferably 4.5 to 6.9.

[0030] The structure of the cosmetic liquid-impregnated face mask according to this embodiment will be described below.

[0031] <Face Mask> A cosmetic liquid-impregnated face mask 1 according to the first embodiment of the present invention will be described with reference to Figure 1. The cosmetic liquid-impregnated face mask 1 mainly consists of the cosmetic composition according to the above embodiment and a sheet-like base material 20 for face masks impregnated with this cosmetic composition. The sheet-like base material 20 has a basis weight of 30 to 100 g / m². 2 It consists of a single nonwoven fabric covering the area, and mainly comprises eye openings 21r, 21l, a nose notch 12, a mouth opening 13, a top portion 14r, 14l, a temple portion 15r, 15l, an ear-proximal portion 16r, 16l, a jaw portion (mandibular angle portion) 27r, 27l, and a chin portion 28r, 28l.

[0032] The eye openings 21r and 21l are approximately oval-shaped holes positioned to correspond to the user's eyes and are opened along the outer circumference of the user's eyes. These approximately oval shapes are each composed of four curves: outer edges 21r1 and 21l1, upper edges 21r2 and 21l2, inner edges 21r3 and 21l3, and lower edges 21r4 and 21l4. As shown in Figure 1, the outer edges 21r1 and 21l1, upper edges 21r2 and 21l2, inner edges 21r3 and 21l3, and lower edges 21r4 and 21l4 are each composed of subcircles with arbitrary radii and are connected to one another. When worn, the eyes are positioned inside the approximately oval shapes.

[0033] The nose notch 12 is located at a position corresponding to the user's nose and consists of cutting lines 12 provided along the side edges and lower edge of the nose. The side edges and lower edge of these cutting lines 12 are straight lines and are connected by a partial circle of an arbitrary radius. When worn, the user's nose pushes up the inner section of the cutting line 12, allowing the nose to pass through the opening formed and the section to adhere tightly to the nose. The nose passing through the opening allows the user to breathe easily.

[0034] The mouth opening 13 is positioned to correspond to the user's mouth and is a roughly oval-shaped hole opened along the outer circumference of the mouth. The width and height of the mouth opening 13 can be arbitrarily determined, and both sides form partial circles with arbitrary radii, as do the top and bottom sides. When worn, the user's mouth is positioned within the mouth opening 13.

[0035] The sheet-like substrate 20 has a shape that is symmetrical with respect to a central perpendicular Z that runs vertically through its center of gravity, and its outer circumference is composed of, from top to bottom, the top portion 14r, 14l, the temple portion 15r, 15l, the portion near the ear 16r, 16l, the jaw portion 27r, 27l, and the chin portion 28r, 28l. In Figure 1, the boundaries of each portion are shown by dashed lines.

[0036] As shown in Figure 1, the apex portions 14r and 14l consist of subcircles having arbitrary radii and arbitrary interior angles, the temple portions 15r and 15l consist of subcircles having arbitrary radii and arbitrary interior angles, and the earlobe portions 16r and 16l consist of subcircles having arbitrary radii and arbitrary interior angles. The jaw portions 27r and 27l consist of partial circles with a radius of 45 mm and an arbitrary interior angle, and are located at least below the nose notch 12. The chin portions 28r and 28l consist of partial circles with a radius of 175 mm and an arbitrary interior angle. The sheet-like base material 20 does not have any structure that allows it to be looped around the user's ears. As a result, the cosmetic liquid-impregnated face mask 1 does not stain the user's hair compared to a cosmetic liquid-impregnated mask that has a structure that allows it to be looped around the ears.

[0037] The vertex 14r and the temple 15r, the temple 15r and the area near the ear 16r, the area near the ear 16r and the jaw area 27r, and the jaw area 27r and the chin area 28r are connected in a continuous manner. The vertex 14l, the temple 15l, the area near the ear 16l, the jaw area 27l, and the chin area 28l are similarly connected to each other. Furthermore, adjacent vertex 14r, 14l and adjacent chin areas 28r, 28l are also connected in a continuous manner, each forming a subcircle with the same center.

[0038] The radii of the jaw portions 28r and 28l are preferably in the range of 170 to 230 mm, but may also be in the range of 170 to 200 mm, 170 to 190 mm, or 175 to 180 mm.

[0039] The radii of the chin portion 28r and 28l are in the range of 170 to 230 mm, allowing the cosmetic liquid-impregnated face mask 1 to conform to the curves of the user's chin and facial contours, and to cover them while closely adhering to the user's chin and facial contours.

[0040] The radius R2 of the curves forming the gill sections 27r and 27l is preferably in the range of 40 to 60 mm, but may also be 40 to 55 mm or 45 to 50 mm.

[0041] If the portion covering the user's jaw and cheekbones is composed of a single curve, the sheet-like base material 10 may not be able to adequately cover the cheekbones. However, according to this embodiment, by constructing the portion covering the jaw and cheekbones using at least two curves, namely cheekbones 27r, 27l and jawbones 28r, 28l, the cheekbones can be reliably covered. In this invention, the user's cheekbones refer to the portion that protrudes most outward at the mandibular angle of the mandible.

[0042] The gill sections 27r and 27l are each provided with slits 19r and 19l extending from the center of the curves forming the gill sections 27r and 27l toward the center. Between the jaw sections 28r and 28l, a slit 19c is provided, extending from the connection point of the jaw sections 28r and 28l toward the center of the curves forming the jaw sections 28r and 28l. The lengths of the slits 19r, 19l, and 19c are 20 mm. The length of the slits is not particularly limited, but a range of 15 to 20 mm is preferred.

[0043] The length L from the lowest part of the nasal notch 12 to the lower edge of the sheet-like base material 20, i.e., the lowest part of the chin portions 28r and 28l, is 90 mm. The length L is preferably in the range of 80 to 110 mm, more preferably in the range of 85 to 105 mm, and even more preferably in the range of 90 to 100 mm.

[0044] The radii of the chin portion 28r and 28l are in the range of 170-230 mm, and the length L is in the range of 80-110 mm. This allows the cosmetic liquid-impregnated face mask 1 to adhere closely to and cover the contours of the user's chin and face, thus reducing the amount of air between the cosmetic liquid-impregnated face mask 1 and the user's face. Therefore, even though the cosmetic liquid-impregnated face mask 1 does not have a structure that hooks over the user's ears, it can adhere closely to the user's face for a long period of time. The radii being in the range of 170-200 mm makes it possible to reduce the amount of nonwoven fabric used. The radii being in the range of 170-190 mm reduces the amount of nonwoven fabric used and simplifies production. The radii being in the range of 175-180 mm reduces the amount of nonwoven fabric used and simplifies production, and it becomes possible to match the standard dimensions of a woman's face and the standard female face shape. The length L being in the range of 85-105 mm makes it easier for women, who generally have smaller faces than men, to use. Being in the 90-100mm range makes it a standard size for a woman's face, allowing it to fit a standard female face shape.

[0045] Furthermore, the radius (R1) of the portion 28c at the bottom edge of the sheet-like substrate 20 where it intersects with the central perpendicular line Z of the sheet-like substrate 20 is 175 mm. This radius R1 is preferably in the range of 170 to 230 mm, but may also be 170 to 200 mm, 170 to 190 mm, or 175 to 180 mm. The portion 18c at the bottom edge of the sheet-like substrate 20 where it intersects with the central perpendicular line Z of the sheet-like substrate 20 is the lowest part of the chin portions 28r and 28l, and corresponds to the connection point between the chin portions 28r and 28l. The chin portions 28r and 28l are continuously connected to form a single curve with radius R1. If R1 is less than 170 mm, the cosmetic liquid-impregnated face mask 1 may not be able to conform to the curves of the chin and facial contours, and the user's jawline may be exposed without being covered. If R1 exceeds 230 mm, the cosmetic liquid-impregnated face mask 1 may not be able to conform to the curves of the jaw and facial contours, covering the user's neck, causing the impregnation liquid to drip and potentially staining the user's neck or clothing.

[0046] Figure 2 illustrates the state of the face mask 1, which is impregnated with cosmetic liquid, when worn on the face. The cosmetic liquid-impregnated face mask 1 is placed on the face so that the eye openings 21r, 21l, nose notch 12, and mouth opening 13 correspond to the eyes, nose, and mouth, respectively. As shown in Figure 2, when the cosmetic liquid-impregnated face mask 1 is fitted to the user 200, the chin portion 28 is fitted so that it is folded along the user 200's chin. At this time, the top portions 14r and 14l are positioned to extend at least to a part of the forehead, and the temple portions 15r and 15l are positioned to extend at least to a part of the temples. The ear-proximal portions 16r and 16l extend to a position that is a predetermined distance from the ear and do not come into contact with the ear. The jaw portion 27 extends beyond the jaw, so that at least a part of the cosmetic liquid-impregnated face mask 1 covers the jaw. The chin portion 28 extends beyond the lower end of the mental prominence of the mandible, so that at least a part of the cosmetic liquid-impregnated face mask 1 covers the chin. The ends separated by the slits 19r, 19l and 19c can overlap each other. This allows the length and radius of the jaw portion 27r and 27l and / or chin portion 28r and 28l to be adjusted according to the size of the user's face, so that the cosmetic liquid-impregnated face mask 1 can properly adhere to the user's jaw and / or chin.

[0047] Furthermore, the apex portion 14r, 14l, the temple portion 15r, 15l, the portion near the ear 16r, 16l, the jaw portion 27r, 27l, and the chin portion 28r, 28l do not need to be connected to each other in a continuous manner, but it is sufficient that they are connected to each other.

[0048] Since the cosmetic liquid-impregnated face mask 1 can be formed from a single sheet of nonwoven fabric, it can reduce manufacturing costs compared to masks with a large number of components, such as masks formed by attaching two or more sheets of nonwoven fabric or masks with separate ear loops (for example, 3D masks and masks with ear loops). However, the cosmetic liquid-impregnated face mask 1 may also use a sheet-like base material that has a three-dimensional structure formed by attaching two or more sheets of nonwoven fabric.

[0049] The fibers (materials) that make up the nonwoven fabric are not particularly limited and include, for example, natural fibers and chemical fibers. Examples of natural fibers include plant fibers such as cotton, pulp, cellulose, and hemp; and animal fibers such as wool and silk. Examples of chemical fibers include inorganic fibers such as metal fibers; refined fibers such as lyocell (Tencel); regenerated fibers such as rayon and casein fibers; semi-synthetic fibers such as acetate; and synthetic fibers such as nylon, polyvinyl chloride, polyester, acrylic, polyethylene, polypropylene, and polyurethane. The fibers that make up the nonwoven fabric can be used individually or in combination of two or more types.

[0050] The structure of the nonwoven fabric is not particularly limited, whether it has a laminated structure or not, as long as the desired effect is provided. Examples of the above nonwoven fabric are not particularly limited, but include spunbond nonwoven fabric, spunlace nonwoven fabric, thermal bond nonwoven fabric, needle punch nonwoven fabric, and stitch bond nonwoven fabric. Furthermore, the surface of the nonwoven fabric may be embossed.

[0051] The basis weight of the nonwoven fabric is not particularly limited, but is generally between 30 and 100 g / m². 2 It is preferable that the range be 35-80 g / m². 2 It is more preferable that the range be 35-65 g / m². 2 Preferably, the range is 35-60 g / m². 2 It may also be within that range.

[0052] Because the cosmetic liquid-impregnated face mask 1 does not have a structure that loops around the user's ears, it does not stain the user's hair compared to cosmetic liquid-impregnated masks that loop around the ears.

[0053] Furthermore, the cosmetic liquid-impregnated face mask 1 of the above embodiment has one or more of the following effects. (1) A face mask is provided that has excellent adhesion and is resistant to peeling. (2) A face mask is provided that can cover the user up to the chin and that prevents or suppresses contact of the face mask with the user's hair, ears, or neck when worn. (3) Due to its excellent adhesion, the face mask is prevented from lifting during wear and can be used in close contact with the face for extended periods. (4) Face masks can be manufactured using a sheet-like substrate consisting of a single flat sheet, which simplifies the manufacturing process and reduces costs.

[0054] Next, the second cosmetic liquid-impregnated face mask 2 and the second sheet-like substrate 50 according to the second embodiment will be described with reference to Figure 3.

[0055] The cosmetic liquid-impregnated face mask 2 mainly consists of the cosmetic composition according to the above-described embodiment and a sheet-like base material 50 for the face mask impregnated with this cosmetic composition. The sheet-like base material 50 has a basis weight of 30 to 100 g / m². 2 The second sheet-like base material consists of a single nonwoven fabric covering the area, and mainly comprises eye openings 21r, 21l, a nose cutout 52, a mouth opening 13, a top portion 14r, 14l, a temple portion 15r, 15l, an ear-proximal portion 16r, 16l, a jaw portion (mandibular angle portion) 57r, 57l, and a chin portion 58r, 58l. The sheet-like base material 50 has a shape that is symmetrical with respect to a central perpendicular line Z that runs vertically through its center of gravity. In Figure 3, the boundaries of each part are shown with dashed lines. The second sheet-like base material differs from the first embodiment in the configuration of the nose cutout 52, the jaw portion 57r, 57l, and the chin portion 58r, 58l. The following will mainly describe these differences, and the same components as in the first embodiment will be denoted by the same reference numerals and their description will be omitted.

[0056] The nose notch 52 forms a nasal opening located at a position corresponding to the user's nose and consists of cutting lines 52 provided along the side edges and lower edge of the nose. The width of the nose notch 52 is longer than that of the nose notch 12 according to the first embodiment at any position in the vertical direction of the nose notch 52. The side edges and lower edge of this cutting line 52 are straight lines and are connected by a partial circle having an arbitrary radius. When worn, the user's nose pushes up the cut piece inside the cutting line 52, allowing the nose to pass through the opening formed and the cut piece to adhere tightly to the nose. The nose passing through the opening allows the user to breathe easily.

[0057] The gill portions 57r and 57l consist of partial circles with a radius of 45 mm and an arbitrary interior angle, and are located at least below the nasal notch portion 52. The chin portions 58r and 58l consist of partial circles with a radius of 170 mm and an arbitrary interior angle. Also, in Figure 3, the radius (R1) of the portion 28c (58c) where the lower edge of the sheet-like substrate 50 intersects with the central perpendicular Z of the sheet-like substrate 50 is 170 mm. The ear-proximal portion 16r and the gill portion 57r, and the gill portion 57r and the chin portion 58r are connected to each other in a continuous manner. The ear-proximal portion 16l, the gill portion 57l, and the chin portion 58l are similarly connected to each other. In addition, adjacent chin portions 58r and 58l are also connected to each other in a continuous manner, forming partial circles with the same center. The preferred ranges of the gill portions 57r and 57l and the chin portions 58r and 58l are the same as in the first embodiment. This provides the same effects as in the first embodiment.

[0058] The sheet-like base material 50 does not have any structure that allows it to be looped around the user's ears. As a result, the cosmetic liquid-impregnated face mask 2 does not stain the user's hair compared to a cosmetic liquid-impregnated mask that has a structure that allows it to be looped around the ears.

[0059] The material of the sheet-like substrate 20 and the state in which the cosmetic liquid-impregnated face mask 1 is worn on the face are the same as in the first embodiment, so a description will be omitted.

[0060] According to this embodiment, the same effects as those of the first embodiment can be obtained.

[0061] Next, the third cosmetic liquid-impregnated face mask 3 and the third sheet-like substrate 60 according to the third embodiment will be described with reference to Figure 4.

[0062] The cosmetic liquid-impregnated face mask 3 mainly consists of the cosmetic composition according to the above embodiment and a sheet-like base material 60 for face masks impregnated with this cosmetic composition. The sheet-like base material 60 has a basis weight of 30 to 100 g / m². 2 The second sheet-like base material consists of a single nonwoven fabric covering the area, and mainly comprises eye cutouts 61r, 61l, nose cutout 62, mouth opening 13, top portion 14r, 14l, temple portion 15r, 15l, ear-proximal portion 16r, 16l, jaw portion (mandibular angle portion) 67r, 67l, and chin portion 68r, 68l. The sheet-like base material 60 has a shape symmetrical with respect to a central perpendicular line Z that runs vertically through its center of gravity. In Figure 4, the boundaries of each part are shown with dashed lines. The second sheet-like base material differs from the first embodiment in the appearance of the eye cutouts 61r, 61l, nose cutout 62, jaw portion 67r, 67l, and chin portion 68r, 68l. The following will mainly describe these differences, and components similar to those in the first embodiment will be denoted by the same reference numerals and their description will be omitted.

[0063] The eye cuts 61r and 61l consist of cutting lines 61r and 61l positioned to correspond to the user's eye and along the upper edge of the user's eyelid, forming an eyelid portion that covers the eyelid. These cutting lines 61r and 61l are each composed of four curves: outer edges 61r1 and 61l1, upper edges 61r2 and 61l2, inner upper edges 61r3 and 61l3, and inner lower edges 61r4 and 61l4. As shown in Figure 4, the outer edges 61r1 and 61l1, upper edges 61r2 and 61l2, inner upper edges 61r3 and 61l3, and inner lower edges 61r4 and 61l4 are all composed of partial circles with arbitrary radii and are connected to each other. When worn, the inner cuts of the cutting lines adhere closely to the eyelid.

[0064] The nose notch 62 is located at a position corresponding to the user's nose and consists of cutting lines 62 provided along the side edges and lower edge of the nose. The width of the nose notch 62 is longer than that of the nose notch 12 in the first embodiment at any position in the vertical direction of the nose notch 62. Furthermore, in the vertical direction, the width of the nose notch 62 is shorter than that of the nose notch 52 in the second embodiment at the upper end of the nose notch 62 and longer at the lower end (lower edge) of the nose notch 62. The side edges and lower edge of this cutting line 62 are straight lines and are connected by a partial circle with an arbitrary radius. When worn, the user's nose pushes up the inner section of the cutting line 62, and the nose passes through the opening formed thereby, and the section adheres tightly to the nose. The nose passing through the opening allows the user to breathe easily.

[0065] The gill portions 67r and 67l consist of partial circles with a radius of 45 mm and an arbitrary interior angle, and are located at least below the nasal notch portion 62. The chin portions 68r and 68l consist of partial circles with a radius of 230 mm and an arbitrary interior angle. Also, in Figure 4, the radius (R1) of the portion 28c (68c) where the lower edge of the sheet-like base material 60 intersects with the central perpendicular Z of the sheet-like base material 60 is 230 mm. The ear-proximal portion 16r and the gill portion 67r, and the gill portion 67r and the chin portion 68r are connected to each other in a continuous manner. The ear-proximal portion 16l, the gill portion 67l, and the chin portion 68l are similarly connected to each other. In addition, adjacent chin portions 68r and 68l are also connected to each other in a continuous manner, forming partial circles with the same center. The preferred ranges of the gill portions 67r and 67l and the chin portions 68r and 68l are the same as in the first embodiment. This provides the same effects as in the first embodiment.

[0066] The sheet-like base material 60 does not have any structure that allows it to be looped around the user's ears. As a result, the cosmetic liquid-impregnated face mask 3 does not stain the user's hair compared to a cosmetic liquid-impregnated mask that has a structure that allows it to be looped around the ears.

[0067] The material of the sheet-like substrate 60 and the state in which the cosmetic liquid-impregnated face mask 1 is worn on the face are the same as in the first embodiment, so a description will be omitted.

[0068] According to this embodiment, the same effects as those of the first embodiment can be obtained.

[0069] Furthermore, the apex portion 14r, 14l, the temple portion 15r, 15l, the portion near the ear 16r, 16l, the jaw portion 27r, 27l, 57r, 57l, 67r, 67l, and the chin portion 28r, 28l, 58r, 58l, 68r, 68l do not need to be connected to each other in a continuous manner, but it is sufficient that they are connected to each other. In addition, in any embodiment, the eye openings 21r, 21l, eye notches 61r, 61l, nose notches 12, 52, 62, and mouth opening 13 do not need to be provided. In any embodiment, the slits 19r, 19l, and 19c may not be provided, or only a portion of the slits 19r, 19l, and 19c may be provided. In addition, further slits may be provided in addition to the slits 19r, 19l, and 19c.

[0070] In all embodiments, the material of the sheet-like substrates 20, 50, and 60 is not particularly limited as long as it can be impregnated with the cosmetic composition. The material of the sheet-like substrates 20, 50, and 60 may be knitted or woven fabric instead of nonwoven fabric, and may be composed of multiple fabrics instead of just one. The sheet-like substrates 20, 50, and 60 may also be laminates, such as laminates of woven fabrics, laminates of nonwoven fabrics, and laminates of woven and nonwoven fabrics.

[0071] In all embodiments, it is preferable that the sheet-like substrates 20, 50, and 60 are composed of a single flat sheet, as this simplifies the manufacturing process and reduces costs. The cosmetic liquid-impregnated face mask according to the above embodiment exhibits excellent adhesion even when using a sheet-like substrate composed of a flat sheet, and peeling and lifting during application can be suppressed. The thickness of the sheet-like substrates 20, 50, and 60 is not particularly limited, as long as it does not impair the effects of the present invention. For example, it may be 20 μm to 1000 μm, or 50 μm to 600 μm.

[0072] In all embodiments, the sheet-like substrates 20, 50, and 60 may be made from commercially available materials. Commercially available materials are not particularly limited, but examples include the products "RH" and "AS" (both manufactured by Daiwabo Polytech Co., Ltd.), "TCF" (manufactured by Futamura Chemical Co., Ltd.), "Cottoace" (manufactured by Unitika Ltd.), "Curaflex" (manufactured by Kuraray Co., Ltd.), "Benliese" (manufactured by Asahi Kasei Corporation), and "Sunmore" (manufactured by Sansho Paper Industry Co., Ltd.).

[0073] In all embodiments, the amount of cosmetic composition impregnated into the sheet-like substrates 20, 50, and 60 is preferably 400 to 2,000 parts by weight, more preferably 450 to 1,600 parts by weight, and even more preferably 1,400 to 1,600 parts by weight, relative to 100 parts by weight of the sheet-like substrate of the present invention, from the viewpoint of moisturizing the face mask and ease of handling. A sufficient moisturizing effect can be obtained if the amount of cosmetic composition impregnated into the sheet-like substrate (20, 50, 60) is 400 parts by weight or more relative to 100 parts by weight of the sheet-like substrate of the present invention. The ease of handling of the face mask can be improved if the amount of cosmetic composition impregnated into the sheet-like substrate (20, 50, 60) is 2,000 parts by weight or less relative to 100 parts by weight of the sheet-like substrate of the present invention. There are no particular restrictions on the impregnation method, and it can be appropriately selected depending on the purpose. For example, methods include dropping or spraying the cosmetic composition onto the sheet-like substrates 20, 50, and 60, or immersing the sheet-like substrates 20, 50, and 60 in the cosmetic composition. After impregnation, it is preferable to package the cosmetic liquid-impregnated face masks 1, 2, and 3 in a well-sealed aluminum pouch or the like to prevent the volatilization of components in the cosmetic composition. Alternatively, the sheet-like substrates 20, 50, and 60 may be combined with the cosmetic composition to form a set or kit, in which the cosmetic composition is impregnated into the sheet-like substrates 20, 50, and 60 and applied to the skin at the time of use.

[0074] In all embodiments, the cosmetic liquid-impregnated face masks (sheet-like base materials 20, 50, 60) 1, 2, 3 cover the entire face of the user, but they may also be configured to cover at least a portion of the user's face.

[0075] In the above embodiments, cosmetic liquid-impregnated face masks 1, 2, and 3 that cover the entire face have been described, but these may be composed of multiple mask bodies that are formed separately. For example, a cosmetic liquid-impregnated face mask may have a structure having an upper mask body and a lower mask body that are formed separately vertically.

[0076] The cosmetic liquid-impregnated face masks 1, 2, and 3 of the above embodiments are not particularly limited in their use. For example, they can be preferably used as cosmetics, pharmaceuticals, or quasi-drugs. Specifically, they are preferably used for skincare purposes, and are applied to the skin for a certain period of time for purposes such as cosmetic effects and moisturizing effects. [Examples]

[0077] The present invention will be described in more detail below based on examples, but the present invention is not limited to these examples. Unless otherwise specified, all experiments in the following examples were conducted at 25±3℃.

[0078] The physical properties of the cosmetic compositions prepared below were measured and evaluated using the methods described below. (1) String length (mm) The length (mm) of the cosmetic composition was measured according to the methods described in steps 1 to 3 below. The measurement was performed at a temperature of 25 ± 3°C. Step 1: Prepare container A (inner diameter 30 mm, volume 10 mL) and fill it with a sample of the cosmetic composition so that it is the same height as the rim of container A. Step 2: A stainless steel disc-shaped pressure-sensitive shaft (No. 1 adapter, 20 mm in diameter) is attached to the viscoelasticity measuring device (Sun Denshi Co., Ltd., CR-3000EX). Container A, filled with the sample prepared in Step 1, is placed on the measuring platform of the viscoelasticity measuring device, and the lower surface of the pressure-sensitive shaft is brought into contact with the liquid surface of the sample. Step 3: Lower the container A filled with the sample at a speed of 1200 mm / min to separate the sample, and measure the length of the drawn thread (the maximum length by which the sample is stretched by the pressure-sensitive shaft) (mm) generated between the sample and the pressure-sensitive shaft at that time, and define it as the "length of the drawn thread (mm)".

[0079] (2) Adhesion As sheet-like base materials, non-woven fabrics 1 to 3 were prepared. Non-woven fabric 1 (cellulose-based non-woven fabric, basis weight 60 g / m 2 ) Non-woven fabric 2 (three-layer structure of rayon / pulp / rayon, basis weight 60 g / m 2 ) Non-woven fabric 3 (lyocell 100%, basis weight 60 g / m 2 ) Drop 0.05 mL of the sample of the cosmetic composition onto the skin on the inner side of the forearm, place each sheet-like base material cut into a size of 10 mm × 20 mm on the sample, and let it stand. The sample dropped on the skin was impregnated into the sheet-like base material. The adhesion of the sheet-like base material to the skin during the 15 minutes of standing after dropping the sample was evaluated based on the following criteria. A: The area of the adhered part hardly decreased and there was no mid-floating from immediately after the start. B: Gradually, slight mid-floating occurred and the area of the adhered part slightly decreased.[[ID=??]] C: Mid-floating was confirmed from immediately after the start, the area of the adhered part decreased, and a dry feeling was observed.

[0080] <Preparation and Evaluation of Cosmetic Composition (1)> Each component shown in Table 1 was blended to prepare cosmetic liquids 1 to 5 as cosmetic compositions, and physical property measurements and evaluations were performed by the above-described method. The results are shown in Table 1.

[0081]

Table 1

[0084] <Preparation and evaluation of cosmetic compositions (2)> Cosmetic compositions 6 to 8 were prepared by blending the components shown in Table 2, and their physical properties were measured and evaluated using the method described above. Nonwoven fabric 1 was used in this evaluation. Viscosity measurements of the cosmetic compositions were also performed in this evaluation. Viscosity measurements were performed using a Type B viscometer (TVB-25L, manufactured by Toki Sangyo Co., Ltd.) at a temperature of 25±3℃, under the conditions of rotor No. 1, 30 rpm, and 60 seconds. The results are shown in Table 2. Table 2 also shows the composition and results of cosmetic solution 4, as shown in Table 1 above, for comparison with cosmetic solutions 6-8. Cosmetic solution 7 had low viscosity and could not be measured.

[0085] [Table 2]

[0086] The components shown in Table 2 are as follows: Thickening agent 1: Xanthan gum (manufactured by Nisshin Oillio Group Ltd., Nomucoat Z) Thickener 2: High-polymer polyethylene glycol (manufactured by Dow Chemical Japan Ltd., Polyox WSR N60K) Thickening agent 3: Hydroxyethylcellulose (manufactured by Ashland Japan Co., Ltd., Natrosol 250HHR)

[0087] Table 2 also confirmed that sheet-like substrates impregnated with cosmetic solutions 4, 6, and 8, which have a thread length of 10 mm or more, exhibited excellent adhesion to the skin. On the other hand, sheet-like substrates impregnated with cosmetic solution 7, which has a thread length of less than 10 mm, were found to have poor adhesion to the skin. This evaluation also confirmed that adhesion tends to improve depending on the thread length. Furthermore, a comparison of cosmetic solutions 4, 6-8 revealed no correlation between viscosity and adhesion. It was also found that the thread length cannot be controlled solely by viscosity. Furthermore, a comparison of cosmetic solutions 1-8 confirmed that there is a correlation between thread length and adhesion even when different types of thickening agents are used.

[0088] <Preparation of a face mask impregnated with cosmetic liquid> 1500 parts by weight of cosmetic liquids 2, 3, and 4, which are cosmetic compositions, were impregnated into 100 parts by weight of a sheet-like base material 20 for face masks shown in Figure 1 to prepare cosmetic liquid-impregnated face masks E1, E2, and E3. A cosmetic liquid-impregnated face mask C1 was prepared in the same manner as described above, except that cosmetic liquid 4 was used as the cosmetic composition and the comparative sheet-like substrate 30 shown in Figure 5 was used. A cosmetic liquid-impregnated face mask C2 was prepared in the same manner as described above, except that cosmetic liquid 4 was used as the cosmetic composition and the comparative sheet-like substrate 40 shown in Figure 7 was used. The comparative sheet-like substrate 30 shown in Figure 5 and the comparative sheet-like substrate 40 shown in Figure 7 correspond to conventional examples. In Figures 5 and 7, the same reference numerals are used for components similar to those in the first embodiment. The comparative sheet-like substrate 30 differs from the first embodiment in the configuration of the jaw portions 38r and 38l, and in the absence of gill portions. The comparative sheet-like substrate 40 differs from the first embodiment in the configuration of the gill portions 47r and 47l, and the jaw portions 48r and 48l.

[0089] Table 3 shows the composition of the cosmetic composition and sheet-like substrate used in each cosmetic liquid-impregnated face mask. In Table 3, R1 corresponds to the radius of the curves (28r and 28l, 38r and 38l, 48r and 48l, respectively) at the points where the central perpendicular of the sheet-like substrate intersects with the curve (28c, 38c, 48c); L corresponds to the length from the nose cutout to the bottom edge of the sheet-like substrate, i.e., the length from the bottom of the nose cutout 12 to the bottom of the chin sections 28r and 28l (28c, 38c, 48c); and R2 corresponds to the radius of the curves of the jaw area (27r and 27l, 47r and 47l, respectively).

[0090] [Table 3]

[0091] <Evaluation of mask shape> Each of the cosmetic-soaked face masks prepared as described above was applied to the user's face, covering from the face down to the chin. Figures 2, 6, and 8 are schematic diagrams showing the state when wearing the cosmetic liquid-impregnated face masks E3, C1, and C2, respectively. As shown in Figure 2, a cosmetic liquid-impregnated face mask using the sheet-like substrate 20 shown in Figure 1, with a radius R1 in the range of 170 to 230 mm, can conform to the curves of the user's jaw and facial contours, and covers the user's jawline and cheekbones. On the other hand, as shown in Figure 6, a cosmetic liquid-impregnated face mask using the comparative sheet-like substrate 30 shown in Figure 5, which has a radius R1 of less than 170 mm, cannot cover the jaw area (the area enclosed by the dashed line in Figure 6). Furthermore, as shown in Figure 8, in the case of a cosmetic liquid-impregnated face mask using the comparative sheet-like substrate 40 shown in Figure 7, where the radius R1 exceeds 230 mm, the lower edge of the mask reaches the user's neck (the area enclosed by the dashed line in Figure 8). Covering the user's neck is undesirable because it can easily cause the mask to peel off during wear and may cause contamination of clothing.

[0092] <Adhesion Evaluation> The adhesion of cosmetic liquid-impregnated face masks E1, E2, and E3 was evaluated using the following method. The results are shown in Table 4.

[0093] (Mask adhesion) Each of the obtained cosmetic solution-impregnated face masks was applied to the user's face, covering from the face down to the chin, and left undisturbed for 15 minutes. The adhesion of the face mask after 15 minutes was observed and evaluated according to the following criteria. A: After 15 minutes, the face mask has not peeled off, has not lifted in the middle, and maintains a tight fit. B: After 15 minutes, there was no peeling of the face mask, but one or more areas lifted in the middle. C: Face mask detached after 15 minutes.

[0094] [Table 4]

[0095] Table 4 shows that cosmetic solution-impregnated face masks E2 and E3, which were impregnated with cosmetic solutions 3 and 4, which have a thread length of 10 mm or more, exhibited excellent adhesion to the skin and suppressed peeling. On the other hand, cosmetic solution-impregnated face mask E1, which was impregnated with cosmetic solution 2, which has a thread length of less than 10 mm, had insufficient adhesion to the skin, and peeling was observed in the area below the chin.

[0096] Although preferred embodiments and examples of the present invention have been described above, the present invention is not limited thereto. Additions, omissions, substitutions, and other modifications to the configuration are possible without departing from the spirit of the present invention.

[0097] For example, the shape and physical properties of a face mask may change between the state before impregnation with the cosmetic composition (dry) and the state after impregnation (wet). However, whether the face mask is dry, wet, or a wet face mask that has been dried, as long as it falls within the range shown in the above embodiments, it falls within the scope of the present invention. Furthermore, for example, the material and weaving method of the sheet-like base material constituting the face mask may affect the physical properties such as the rate of expansion and contraction after impregnation with the cosmetic composition. However, whether the face mask is dry, wet, or a wet face mask that has been dried, as long as it falls within the range shown in the above embodiments, it falls within the scope of the present invention.

[0098] The scope of this invention is not limited to the foregoing description, and other examples may be provided, with appropriate modifications, as long as they do not impair the spirit of the invention. All documents and publications mentioned herein, regardless of their purpose, are incorporated herein by reference in their entirety. Furthermore, this specification includes the claims and disclosures of the Japanese Patent Application No. 2020-072100 (filed April 14, 2020), which forms the basis of this application's priority claim. [Industrial applicability]

[0099] The cosmetic liquid-impregnated face mask of the present invention can be preferably used, for example, as a cosmetic, pharmaceutical, or quasi-drug, and is particularly suitable for skincare applications. [Explanation of symbols]

[0100] 1, 2, 3, C1, C2 Face masks impregnated with cosmetic liquid 12, 52, 62 Nose cut 13 Opening 14r, 14l top 15r, 15l temple area 16r, 16l near the ear 19r, 19l, 19c slit 20, 50, 60 Sheet-type substrate 30, 40 Comparative sheet-like substrate 21r, 21l eye opening 21r1, 21l1 outer edges 21r2, 21l2 upper side 21r3, 21l3 inner side 21r4, 21l4 lower side 27r, 27l, 47r, 47l, 57r, 57l, 67r, 67l: Jawline (mandibular angle) 28r, 28l, 38r, 38l, 48r, 48l, 58r, 58l, 68r, 68l jaw area 28c (58c, 68c), 38c, 48c: The portion where the central perpendicular of the sheet-like substrate intersects. 61r, 61l cut section 61r1, 61l1 outer edges 61r2, 61l2 Upper side 61r3, 61l3 inner upper side 61r4, 61l4 inner lower side L: Length from the bottom of the nose cutout to the bottom edge of the sheet-like substrate. Z-center perpendicular

Claims

1. A sheet-like substrate made of a single flat sheet, so as to cover at least a portion of the user's face, A face mask comprising a cosmetic composition impregnated into the sheet-like substrate, The outer circumference of the sheet-like substrate is composed of, in order from top to bottom, a top portion, a temple portion, an earlobe portion, a jaw portion, and a chin portion, each consisting of a partial circle. The top portion and the temple portion, the temple portion and the earlobe portion, the earlobe portion and the jaw portion, and the jaw portion are connected to each other in a continuous manner. The aforementioned sheet-like substrate is provided with a nose cutout through which the user's nose passes, The length L from the lowest part of the nose cutout to the lower edge of the sheet-like substrate is in the range of 80 to 100 mm. The radius R1 of the curve at the lower edge of the sheet-like substrate where it intersects with the central perpendicular of the sheet-like substrate is in the range of 170 to 230 mm. The jaw portion is provided with a slit extending from the point where it intersects with the central perpendicular of the sheet-like substrate toward the center of the curve forming the jaw portion. The impregnated cosmetic composition is a liquid whose string length is 10 mm or more when pulled apart at a speed of 1200 mm / min. The aforementioned jaw area is located below the aforementioned nasal incision and consists of a curve with a radius R2 in the range of 40 to 60 mm, forming a face mask.

2. The face mask according to claim 1, wherein the gill area forms a continuous curve with the lower edge of the sheet-like base material.

3. The face mask according to claim 1 or 2, wherein the cosmetic composition comprises 0.001 to 5% by weight of a thickening agent and 0.1 to 50% by weight of a humectant, based on the total weight of the cosmetic composition.

4. The face mask according to any one of claims 1 to 3, wherein the sheet-like substrate comprises at least one mouth opening provided at a position corresponding to the user's mouth, and at least one eye opening provided at a position corresponding to the user's eyes or an eyelid portion configured to cover the user's eyelids.

5. The face mask according to any one of claims 1 to 4, wherein the sheet-like substrate is configured so as not to come into contact with the user's ears.

6. The face mask according to any one of claims 1 to 5, wherein the sheet-like base material is made of a nonwoven fabric, a knitted fabric, or a woven fabric.

7. The sheet-like substrate includes a nonwoven fabric, and the basis weight of the nonwoven fabric is 30 to 100 g / m². 2 The face mask according to claim 6, which is within the range of [specified range].

8. The face mask according to any one of claims 1 to 7, wherein the cosmetic composition is impregnated in a ratio of 400 to 2,000 parts by weight per 100 parts by weight of the sheet-like substrate.

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