Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0212—Face masks
• • A—HUMAN NECESSITIES
  • A45—HAND OR TRAVELLING ARTICLES
  • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
  • A45D44/00—Other cosmetic or toiletry articles, e.g. for hairdressers' rooms
  • A45D44/002—Masks for cosmetic treatment of the face
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • A61K8/8105—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • A61K8/8111—Homopolymers or copolymers of aliphatic olefines, e.g. polyethylene, polyisobutene; Compositions of derivatives of such polymers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/59—Mixtures
  • A61K2800/594—Mixtures of polymers

Definitions

• SHEET-LIKE SUBSTRATE HAVING A FUNCTION OF LIMITING MIGRATION OF FORMULAS APPLIED ON TARGETED ZONES THEREOF, AND SHEET-LIKE
• the present invention relates to a sheet-like substrate, for example, used for sheet-like cosmetic products such as facial masks, patches and wipes.
• the present invention also relates to a sheet-like cosmetic product manufactured using such a substrate.
• Facial masks, patches, and wipes are the most popular substrate-based cosmetic products. Such sheet-like cosmetic products are conventionally impregnated with one kind of cosmetic formula. Recently, printing technologies for applying multiple kinds of cosmetic formulas on one sheet-like substrate has been developed in order to address the different concerns of the user's skin.
• 2015/140283 Al proposes to apply the multiple kinds of formulas on the substrate in a dry stage.
• this approach has a problem in that a large amount of polyols or oils cannot be used in such a product since they cannot completely dry out. Therefore, products manufactured using this approach do not have the same sensory experience for the user as the packed masks currently sold in the market.
• WO 2015/097207 Al proposes the selecting of compositions of formulas in order to ensure that two adjacent formulas do not mix on a substrate.
• the substrate-based products are to be impregnated with large amounts of multiple liquid formulas with different behavior, one specific liquid formula which is more flowable and less absorbent on the substrate can flow on a surface of the substrate and migrate to the adjacent zone for another formula.
• an object of the present invention is to provide a novel sheet-like substrate suitable for applying multiple kinds of formulas on respective targeted zones thereof with little or no migration of applied formulas between adjacent zones.
• Another object of the present invention is to provide a novel sheet-like cosmetic product manufactured using such a substrate.
• the present invention provides a sheet-like substrate, in which it is intended that respective targeted zones to which two or more kinds of formulas are to be applied respectively be assigned to the substrate, wherein the substrate is formed of a nonwoven material, and wherein the volume density of the nonwoven material is between 0.01 grams/cm 3 and 0.08 grams/cm 3 . Furthermore, the present invention provides a sheet-like cosmetic product, comprising such a substrate and two or more kinds of formulas impregnated in the substrate.
• cellulosic nonwovens and blends of cellulosic materials with synthetic material-based nonwovens have been used for substrates of sheet-like cosmetic products such as facial masks.
• the areal density of nonwoven materials used for such an application is generally between 40 grams/m 2 (gsm) and 100 grams/m 2 (gsm), and the thickness thereof is from about 0.3 mm to about 1.0 mm.
• the volume density of such nonwoven materials is calculated by dividing the areal density by the thickness.
• Table 1 Volume density of conventional nonwoven materials
• nonwoven materials having such properties are not suitable for manufacturing a substrate in which it is intended that respective targeted zones to which two or more kinds of formulas are to be applied respectively be assigned to the substrate. This is because the applied formulas can relatively freely migrate inside the conventional nonwoven materials.
• the volume density (i.e., the bulk density) of the nonwoven materials is a key parameter in order to give a sheet-like substrate a function of limiting the migration of formulas applied on targeted zones thereof, that is, in order to provide a sheet-like substrate suitable for applying multiple kinds of formulas on respective targeted zones with little or no migration of applied formulas between adjacent zones.
• a sheet-like substrate having the above function can be realized by using nonwoven materials having a relatively low volume density as compared with the volume densities shown in Table 1 , that is, a volume density between 0.01 grams/cm 3 and 0.08 grams/cm 3 .
• the present invention is based on such findings.
• fibers forming the nonwoven material may be hydrophobic fibers.
• fibers forming the nonwoven material may be bi-component fibers comprising two kinds of components having mutually different melting points.
• At least one of the two kinds of components may be selected from the group consisting of polyester, derivatives of polyester, Nylon 6, Nylon 66, polypropylene, polyethylene, polylactic acid, polystyrene, and HDPE. In a more preferred aspect of the present invention, both of the two kinds of components may be selected from this group.
• the two kinds of components may be arranged such that one forms a core of the fiber and the other forms a sheath of the fiber surrounding the core.
• the core may be disposed at the center of the sheath or may be disposed eccentrically from the center of the sheath.
• the two kinds of components may be arranged adjacent to each other in the diametrical direction of the fibers and/or in the circumferential direction of the fibers.
• the nonwoven material may be treated with a hydrophilic finish.
• the hydrophilic finish may be a polymer composed of one or more monomers selected from the group consisting of acrylic acid, methacrylic acid, glutamic acid, ⁇ -carboxyethyl acrylate, maleic acid, and monoesters of maleic acid.
• the substrate may be used for manufacturing sheet-like cosmetic products.
• the sheet-like cosmetic products are one of facial masks, patches and wipes.
• masks as used herein should be understood to include not only masks that cover the entirety of a user's face, but also, for example, half masks that cover only the upper half or lower half of the user's face.
• FIG. 1 is a plan view of a facial mask manufactured using a substrate according to one embodiment of the present invention, in which formulas are not yet applied to respective targeted zones of the substrate.
• FIGS. 2 A to 2D are schematic diagrams showing various kinds of bi- component fibers forming the nonwoven material used for manufacturing the facial mask shown in FIG. 1 , in which the fibers are shown in cross section.
• FIG. 3 is a plan view of the facial mask manufactured using a substrate according to one embodiment of the present invention, in which formulas have already been applied to respective targeted zones of the substrate.
• FIG. 4A is a figure showing a mask-shaped substrate according to one embodiment of the present invention on which two kinds of formulas have been applied, in which the photograph is changed to a diagram for clarity (Example 1).
• FIG. 4B is a figure showing a mask-shaped substrate for comparison on which two kinds of formulas have been applied, in which the photograph is changed to a diagram for clarity (Comparison 1).
• FIG. 5 is a figure showing a mask-shaped substrate according to one embodiment of the present invention on which two kinds of formulas have been applied, in which the photograph is changed to a diagram for clarity (Example 2).
• Example 2 [DETAILED DESCRIPTION OF EMBODIMENTS]
• FIGS. 1 , 2 A to 2D, and 3 The following embodiment relates to a substrate for a sheetlike cosmetic product, in particular, a full facial sheet mask which can cover the entire face of a user.
• a substrate for other forms of sheet masks for example, a substrate for a half type facial sheet mask covering the upper half or the lower half of the face of the user, or to a substrate for patches and wipes.
• FIG. 1 shows a facial sheet mask 1 manufactured using a sheet-like substrate according to one embodiment of the present invention in a spread-out state. Multiple formulas are not yet applied to respective targeted zone (described in detail later) of this mask 1.
• the mask 1 has a center axis line X, which is a left-right symmetrical axis line that divides the mask 1 into two equal parts.
• oval openings 10 and 12 are formed in positions corresponding to the eyes and mouth of the user.
• a U-shaped slit 14 is provided at a position corresponding to the nose of the user of the mask 1 , and by the existence of this slit 14, a flap 16 is formed in the mask 1.
• a plurality of slits (not shown) along the radial direction of the mask 1 may be formed, for example, on the peripheral edge of the mask 1 at predefined, for example, equal intervals.
• the intention of the sheet-like substrate according to one embodiment of the present invention is that respective targeted zones to which two or more kinds of formulas are to be applied respectively be assigned to the substrate (described in more detail below).
• the sheet-like substrate is formed of a nonwoven material, and the volume density of which is between 0.01 grams/cm 3 and 0.08 grams/cm 3 , in particular, between 0.03 grams/cm 3 and 0.06 grams/cm 3 .
• the thickness of the sheet-like substrate, i.e,. the mask 1 is from 0.5 mm to 1.0 mm, more preferably from 0.6 mm to 0.8 mm.
• the fibers forming the nonwoven material as stated above are hydrophobic fibers.
• the fibers forming the nonwoven material are multi- component fibers comprising two or more kinds of components, preferably two or more kinds of polymeric materials, having mutually different melting points.
• the fibers forming the nonwoven material are bi-component fibers comprising two kinds of components, two kinds of polymeric materials, having mutually different melting points.
• the term "bi-component fibers" used herein generally means conjugate fibers comprising two polymeric materials in cross section, but it may contain three or more polymeric materials.
• At least one of the polymeric materials is selected from the group consisting of polyester, preferably polyethylene terephthalate, derivatives of polyester, preferably derivatives of polyethylene terephthalate, Nylon 6, Nylon 66, polypropylene, polyethylene, polylactic acid, polystyrene, and HDPE.
• polyethylene terephthalate having melting point of from 200 to 300°C, in particular 250°C may be selected.
• derivatives of polyethylene terephthalate having melting point of from 110 to 220°C may be selected.
• polyethylene having melting point of from 100 to 150°C, in particular 130°C may be selected.
• polypropylene having melting point of from 150 to 200°C, in particular 175°C may be selected.
• the bi-component fibers contain polyester (preferably polyethylene terephthalate) and derivatives of polyester (preferably derivatives of polyethylene terephthalate).
• the bi-component fibers contain polypropylene and polyethylene.
• the bi-component fibers contain polyester (preferably polyethylene terephthalate) and polyethylene.
• the two kinds of components may be arranged such that one forms a core of the fiber and the other forms a sheath of the fiber surrounding the core.
• the two kinds of components are arranged adjacent to each other in the diametrical direction of the fiber and/or in the circumferential direction of the fiber.
• FIGS. 2A to 2D show various kinds of bi-component fibers that can be used to form the above described nonwoven material in cross section.
• FIG. 2A shows bi- component fiber F in which one component forms a core 100 of the fiber and the other forms a sheath 110 of the fiber surrounding the core 100.
• the core 100 is disposed at the center of the sheath 110. More precisely, the core 100 is disposed so that its center point coincides with the center point "O" of the sheath 110 or fiber F.
• FIG. 2B also shows bi-component fiber F' in which one component forms a core 120 of the fiber and the other forms a sheath 130 of the fiber surrounding the core 120.
• FIG. 2A shows bi- component fiber F in which one component forms a core 100 of the fiber and the other forms a sheath 130 of the fiber surrounding the core 120.
• FIG. 2A shows the core 120 is disposed eccentrically from the center point "O" of the sheath 130 or fiber F'.
• FIG. 2C shows bi- component fiber F" in which the two kinds of components 140, 150 are arranged adjacent to each other in the diametrical direction of the fiber F". In this arrangement, the boundary of the component 140, 150 passes through the center point "O" of the fiber F".
• FIG. 2D also shows bi-component fiber F'" in which the two kinds of components 160, 170 are arranged adjacent to each other.
• FIG. 2C shows bi- component fiber F" in which the two kinds of components 140, 150 are arranged adjacent to each other in the diametrical direction of the fiber F". In this arrangement, the boundary of the component 140, 150 passes through the center point "O" of the fiber F".
• FIG. 2D also shows bi-component fiber F'" in which the two kinds of components 160, 170 are arranged adjacent to each other.
• FIG. 2C shows a state in which the cross section of the fiber is divided into eight sections, it is also possible to divide the cross section of the fiber into more sections or fewer sections.
• the above-described bi-component fibers can be converted into the sheet-like substrate for cosmetic products using a thermal bonding process, more specifically, a process in which hot air is passed through.
• the temperature of the hot air is selected such that only one polymer of bi-component fibers melts to form a consolidated body of the fibers while the other polymer remains in a non-melted state and provides the substrate with a soft fluffy feel required for the cosmetic products.
• Polyester core preferably polyethylene terephthalate core having melting point of from 200 to 300°C, in particular 250°C with polyester derivative sheath, preferably polyethylene terephthalate derivative sheath having melting point of from 110°C to 220°C;
• Polyester core preferably having melting point of from 200 to 300°C, in particular 250°C with polyethylene sheath, preferably having melting point of from 100 to 150°C , in particular 130°C;
• Polypropylene core preferably having melting point of from 150 to 200°C, in particular 175°C with polyethylene sheath, preferably having melting point of from
• the non- woven material forming the sheet-like substrate of the mask 1 is treated with a hydrophilic finish.
• a hydrophilic finish a polymer may be used which is composed of one or more monomers selected from the group consisting of acrylic acid, methacrylic acid, glutamic acid, ⁇ -carboxyethyl acrylate, maleic acid, and monoesters of maleic acid.
• acrylate polymers are used as the hydrophilic finish.
• the acrylate polymers include any polymers comprising acrylic acid and/or methacrylic acid as monomers.
• Application of the hydrophilic finish onto the non- woven material facilitates the wetting of it by the liquid formulas.
• the hydrophilic finish allows the liquid formulas to migrate only the void space among fibers in the non-woven material, i.e., the substrate, due to the hydrophobic nature of the fibers itself.
• FIG. 3 shows a sheet-like cosmetic product, that is, the facial mask 1, according to one embodiment of the present invention which is manufactured using the sheet-like substrate described with reference to FIG. 1 and FIGS. 2Ato 2D.
• this facial mask 1 contrary to the unfinished mask shown in FIG. 1, multiple formulas having different cosmetic benefits have already been applied to (impregnated in) respective targeted zones of the substrate. More specifically, a first formula has been applied to the first targeted zones 200 shown using slanted lines in FIG. 3. A second formula has been applied to the second targeted zones 210 shown using dots in FIG. 3. A third formula has been applied to the third targeted zone 220 shown using cross-hatched lines in FIG. 3.
• the substrate forming the mask 1 has the first targeted zones 200 surrounding the second and third targeted zones 210 and 220, the second targeted zones 210 which generally surround the eye openings 10, and the third targeted zone 220 which generally surrounds the mouth opening 12 and most of the nose flap 16.
• the area corresponding to the nose flap 16 is also included in the first targeted zone 200.
• a well-known printing technique such as a skin printing system or a digital printing system can be used.
• a well-known printing technique such as a skin printing system or a digital printing system
• the Chromo Jet System available from Zimmer Maschinenbau GmbH in Austria
• liquid formulas can be applied to the substrate by air pressure via electronically controlled valves is preferable.
• first targeted zones 200 there are four gaps 340 generally extending in the radial direction of the mask 1.
• second targeted zones 210 there are three gaps 350 generally extending in the radial direction of the mask 1, and two of these gaps 350 are respectively aligned with each of the upper gaps 340 in the first targeted zones 200.
• the above stated gaps 300 to 350 of the mask 1 were brought about by the sheet-like substrate according to one embodiment of the present invention having the function of limiting the migration of formulas applied on the respective targeted zones 200 to 220. In an alternative embodiment, these gaps may not be provided between two adjacent zones and/or within the same zone. In another alternative embodiment, two or more than four formulas may be applied to the sheet-like substrate with or without the above stated gaps.
• the substrate according to one embodiment of the present invention has a function of limiting the migration of formulas applied on targeted zones thereof. Accordingly, the substrate according to one embodiment of the present invention is suitable for applying multiple kinds of formulas on respective targeted zones with little or no migration of the applied formulas between adjacent targeted zones. Moreover, due to the low volume density of the substrate itself, the weight of the mask can be reduced, which contributes to good adhesion of the mask to the face of the user.
• Test Example 1 Effect of preventing migration of non-harsh skin formulas
• the substrate for the facial mask shown in FIG. 1 was prepared.
• the core of the fibers forming the substrate is made of polypropylene (PP), while the sheath of the fibers is made of polyethylene (PE).
• the substrate is treated with acrylate polymer as a hydrophilic finish.
• the areal density of this substrate is 20 grams/m 2 (gsm) and the thickness thereof is 0.76 mm, so the volume density is about 0.03 grams/cm 3 .
• a conventional substrate for a facial mask was prepared.
• This comparative substrate consists of 100% viscose.
• the areal density of the comparative substrate is 50 grams/m 2 (gsm) and the thickness thereof is 0.40 mm, so the volume density of the comparative substrate is about 0.13 grams/cm 3 .
• FIG. 4A shows the state of the substrate according to one embodiment of the present invention after a certain period of time has elapsed after application of the formulas.
• FIG. 4B also shows the state of the comparative substrate after a certain period of time has elapsed after application of the formulas. It should be noted that in both of FIGS. 4 A and 4B, the photograph is changed to a diagram for clarity.
• the boundary between the zone where Formula- 1 was applied and the zone where Formula-2 was applied was markedly blurred. This means that a migration of formulas, that is, a mixing of formulas, occurs between the zone where Formula- 1 was applied and the zone where Formula-2 was applied.
• the boundary between the zone where Formula- 1 was applied and the zone where Formula-2 was applied was clear. This means that a migration of formulas, that is, a mixing of formulas does not occur between the zone where Formula- 1 was applied and the zone where Formula-2 was applied.
• Test Example 2 Effect of preventing migration of harsh skin formulas
• a substrate for a facial mask identical to that used in Test Example 1 was prepared. Furthermore, as two formulas to be applied to this substrate, Formula- 1 shown in the above Table 2, and a chemical peeling formula containing the ingredients shown in following Table 3 in the ratio also shown in the same table, i.e., Formula-3, were prepared.
• Chemical peeling formulas are one example of low pH formulas, whose pH ranges from 1 to 4.
• one example of high pH formulas is skin bleaching formulas, whose pH ranges from 7 to 11.
• FIG. 5 shows the state of the substrate after a certain period of time has elapsed after application of the formulas. It should be noted that in FIG. 5, the photograph is changed to a diagram for clarity.

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Birds (AREA)
• Epidemiology (AREA)
• Dermatology (AREA)
• Cosmetics (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=63168466

Family Applications (1)

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Family Cites Families (9)

• 2017
  • 2017-10-24 JP JP2017205073A patent/JP7158840B2/ja active Active
• 2018
  • 2018-06-20 CN CN201880068791.8A patent/CN111225651A/zh active Pending
  • 2018-06-20 KR KR1020207013732A patent/KR102467140B1/ko active IP Right Grant
  • 2018-06-20 EP EP18753261.9A patent/EP3700497A1/en active Pending
  • 2018-06-20 WO PCT/JP2018/024256 patent/WO2019082440A1/en unknown

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