JP2010281003A - Skin covering sheet for cosmetic impregnation, method for manufacturing the same, and face mask using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin covering sheet for cosmetic impregnation with an appropriate stretching property, and a face mask using the same. <P>SOLUTION: The skin covering sheet for the cosmetic impregnation is obtained by entangling and integrating a filament nonwoven fabric with staple fibers by applying a water flow entanglement processing on a laminated body prepared by laminating a fiber layer comprising the staple fibers on at least one surface of the filament nonwoven fabric with a stretching property at least in one direction so as to make at least one surface. By cutting the sheet so that the one direction with the stretching property of the covering sheet may be positioned in the lateral direction of the face, the face mask with a high fitting property to a site to be stuck and with a good handleability, can be obtained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a cosmetic that is impregnated with cosmetics such as a moisturizing component, a cleansing component, an antiperspirant component, an aroma component, a whitening component, a blood circulation promoting component, an ultraviolet ray preventing component, a slimming component, etc. The present invention relates to a skin covering sheet for impregnation. Furthermore, this invention relates to the face mask which impregnated this sheet | seat with liquid cosmetics.

  Conventionally, face-coated cosmetic sheets such as face masks impregnated with cosmetics have been used. As a sheet suitable for impregnating cosmetics, in WO 2006/016601 (Patent Document 1), a fineness is applied to one or both surfaces of a hydrophilic fiber layer containing 50% by mass or more of hydrophilic fibers. A sheet in which an ultrafine fiber layer containing 10% by mass or more of ultrafine fibers of 0.5 dtex or less is located, the hydrophilic fiber layer and the ultrafine fiber layer are integrated, and the ultrafine fiber layer is used as a contact surface with the skin. Has been proposed. This sheet is characterized in that the ultrafine fiber layer is used as a contact surface with the skin. Due to this feature, the sheet has less irritation to the skin and has good wearability (evaluated by the length of time that the adhesion of the sheet to the skin lasts).

  In Japanese Patent Application Laid-Open No. 2007-312967 (Patent Document 2), a face mask obtained by punching a sheet material having a two-layer structure into which water is entangled in a state in which a web of rayon fibers is superimposed on a polyester spunbond nonwoven fabric in a predetermined shape. Has been proposed. This face mask is not bulky, can be easily spread when used, and has good cosmetic impregnation and adhesion.

  JP-A-2003-166161 (Patent Document 3) discloses a short water-absorbing property having a fineness of 3.5 dtex or less on at least one surface of a heat-bonding nonwoven fabric in which constituent fibers including heat-bonding fibers are bonded together by a partial thermocompression bonding portion. Proposes a skin-wet sheet comprising 90 mass% or more of fibers and laminating a fiber web containing 20 mass% or more of water-absorbing short fibers having a fineness of 1 dtex or less among the water-absorbing short fibers. . This sheet is excellent in liquid impregnation property, has a soft tactile feel on the surface of the nonwoven fabric, suppresses sag when impregnated with a liquid, and has excellent nonwoven fabric openability and adhesion to the skin.

  Recent consumers tend to seek stretchability and adhesion for skin-coated sheets impregnated with cosmetics. This is because, when a skin-coated sheet having elasticity is used as a face mask, the stress generated with the elastic recovery of the sheet after the sheet is slightly stretched and applied to the face, And by giving the user a sensation that the chin (face line) is pulled upward. These sensations make the user feel the effect that the wrinkles are stretched and the face line is lifted during application of the sheet.

International Publication No. 2006/016601 Pamphlet JP 2007-312967 A JP 2003-166161 A

  As described above, it is already known that the skin covering sheet for impregnating cosmetics is required to have stretchability. However, since the skin-coated sheet for impregnating cosmetics coats sensitive parts, it is not sufficient to simply have elasticity. The stretchability of the sheet needs to be designed in consideration of the feeling that the sheet gives to the user when the sheet impregnated with the cosmetic is applied to the skin. However, none of the above references mentions the specific level of stretchability of the skin-coated sheet impregnated with cosmetics, and skin for impregnating cosmetics with appropriate stretchability. A specific configuration of the covering sheet is not disclosed. Furthermore, a commercially available face mask sheet has a property of extending when applied with a small force, but does not have a sufficient property of recovering after being stretched (that is, having only extensibility). . In addition, the sheet having elasticity has a problem that it is difficult to continuously produce and process the sheet.

  In addition, when ultrafine fibers are contained in the sheet surface as in Patent Document 1, the touch is good, but the sheet itself becomes flexible, the feeling of hand-holding tends to be lowered, and the handling tends to be difficult.

  The present invention has been made in view of the above-described problems, and has a high fit to a site to be applied, a low feeling of tension even when used for a long time, and a skin-treating sheet for impregnating cosmetics with a high handleability, and An object is to provide a face mask using the same.

  As a result of repeated studies, the present inventors have laminated a non-woven fabric having elasticity in at least one direction and a fiber layer containing soft staple fibers with a texture and integrated them by hydroentanglement. It has been found that a sheet having a high degree of fit, a good fit to the site to be attached, a feeling of tension even when used for a long time, and a good touch on the surface of the sheet can be obtained, and the present invention has been devised. .

  The skin-covering sheet for impregnating cosmetics of the present invention includes a long fiber and a fiber layer composed of staple fibers having a fiber length of 25 to 80 mm is laminated on at least one surface of a long-fiber nonwoven fabric having elasticity in at least one direction. The long-fiber non-woven fabric and the fiber layer are integrated by hydroentanglement of the long fibers and the staple fibers, and when the laminate is stretched by 20% in one direction. The stress at 0.5% is 10 N / 5 cm, the stress at 20% elongation in the direction orthogonal to one direction is 5-40 N / 5 cm, and the elongation recovery rate at 20% elongation in one direction of the laminate. Is from 60 to 95%, and an elongation recovery rate at 20% elongation in a direction orthogonal to one direction is from 5 to 75%.

The cosmetic-impregnated skin-covering sheet contains long fibers, and a fiber layer composed of staple fibers having a fiber length of 25 to 80 mm is on the surface of at least one surface of a long-fiber nonwoven fabric having elasticity in at least one direction. Laminated to form a laminate,
In the hydroentanglement process, the laminated long fiber nonwoven fabric and the fiber layer are disposed so that the one direction is a direction (CD direction) orthogonal to the machine direction (MD direction), and hydroentanglement is performed to obtain long fibers. Long fibers and staple fibers constituting the nonwoven fabric and the fiber layer are entangled with each other and integrated;
Can be manufactured by a manufacturing method.

  The face mask of the present invention is the above-mentioned skin covering sheet for impregnating cosmetics, wherein the one direction is cut into a predetermined shape so as to be a lateral direction of the face.

  The skin-coated sheet for impregnating cosmetics of the present invention is characterized by having a laminated structure in which a long-fiber nonwoven fabric having elasticity in at least one direction and a fiber layer containing staple fibers are laminated and integrated by hydroentanglement. To do. Since the present invention laminates a long-fiber non-woven fabric having elasticity in at least one direction, it has a high fit to the site to be applied and has little feeling of tension even when used for a long time. Moreover, since a long-fiber nonwoven fabric has moderate stress at the time of low expansion | extension, there exists a hand feeling and a handleability is favorable. Furthermore, since a fiber layer containing staple fibers is formed on the sheet surface, the touch is good.

  In the method for producing a skin sheet for impregnating cosmetics according to the present invention, a long fiber nonwoven fabric having elasticity in at least one direction is used, so that the width of the sheet generated when the laminate is hydroentangled is effectively suppressed. . Moreover, the cutting property when punching into a mask shape is good.

  Since the face mask of the present invention has elasticity particularly in the lateral direction of the face, the face mask can be pulled with a small force, is well adhered to the face, and hardly peels off.

  The skin-impregnated sheet for impregnating cosmetics of the present invention (hereinafter sometimes simply referred to as “coated sheet” or “sheet”) includes at least one of long-fiber nonwoven fabrics containing long fibers and stretchable in at least one direction. It is a laminate in which a fiber layer made of staple fibers having a fiber length of 25 to 80 mm is laminated on the surface to form a surface layer. Here, the term “surface” refers to the main surface (surface perpendicular to the thickness direction) of the nonwoven fabric or layer.

  The long fiber as used in the present invention means a substantially continuous fiber, which is cut into a predetermined fiber length like a staple fiber, or a fiber which is melted and blown by hot air like the melt blown method. except for. Nonwoven fabrics containing long fibers include long fiber nonwoven fabrics that are accumulated while opening long fiber filaments, specifically spunbond nonwoven fabrics. In the spunbond method, resin is melt-extruded from an extruder, resin is spun from a spinneret, and the spun fiber is taken up by an air-flow traction type device such as air soccer. It can be carried out by collecting the fibers on the short fiber layer placed on the web collecting device and then bonding the fibers to each other using a heating device such as a hot air spraying device or a heating roll, if necessary. . As another form, two unidirectional stretch-arranged fiber layers in which filaments are arranged and stretched in one direction are laminated so as to be orthogonal to each other (for example, Nisshin Plast Co., Ltd., Product name "Milife"). Such a long fiber nonwoven fabric has moderate stress at low elongation and high dimensional stability. Therefore, even when a fiber layer containing staple fibers is laminated, there is a hand feeling and good handleability. .

The long-fiber nonwoven fabric is preferably a basis weight of 5~85g / m ^2. A more preferable basis weight is 10 to 80 g / m ² , and still more preferably 20 to 75 g / m ² . The basis weight is appropriately set according to the degree of stretchability and stretchability, texture, and the like.

  The long-fiber nonwoven fabric is a long-fiber nonwoven fabric having elasticity in at least one direction. The term “stretchability” as used in the present invention refers to those having an elongation recovery rate of 50% or more at 20% elongation measured according to JIS L 1096 8.14.2. The direction perpendicular to the one direction may have elasticity, but the one direction is preferably larger in elasticity than the direction perpendicular to the one direction. In consideration of the fit to the face or the processability of the sheet, it is most preferable that one direction has stretchability, and the orthogonal direction has stretchability without stretchability. Specifically, the elongation recovery rate at 20% elongation in one direction of the laminate is 60 to 95%, and the elongation recovery rate at 20% elongation in the direction orthogonal to the one direction is 5 to 75%. . A preferable elongation recovery rate of the laminate is 70 to 90% in one direction and 10 to 70% in a direction orthogonal to the one direction.

  The extensibility is represented by a stress at 20% elongation measured according to JIS L 1096 8.12.1. The smaller the stress at 20% elongation, the higher the extensibility. Specifically, the stress at 20% elongation in one direction of the laminate is 0.5 to 10 N / 5 cm, and the stress at 20% elongation in a direction orthogonal to the one direction is 5 to 40 N / 5 cm. . The preferable stress at the time of extension of the layered product is 1 to 8.5 N / 5 cm in one direction and 8 to 30 N / 5 cm in a direction orthogonal to the one direction.

  In order to satisfy the stretchability and extensibility, it is preferable to use a fiber containing a thermoplastic elastomer as a fiber constituting the long-fiber nonwoven fabric. The fiber containing the thermoplastic elastomer is preferably a fiber made of a resin containing 30% by mass or more of the thermoplastic elastomer. More preferably, it contains 50% by weight or more of a thermoplastic elastomer, and may consist only of a thermoplastic elastomer.

  Examples of thermoplastic elastomers (also simply referred to as “elastomers”) include styrene elastomers, polyolefin elastomers, ester elastomers, vinyl chloride elastomers, urethane elastomers, and amide elastomers.

  The styrenic elastomer is preferably a copolymer containing a styrene component in an amount of 5% by weight to 70% by weight. Specific examples of styrene elastomers include styrene / butadiene block copolymer elastomers, styrene / isoprene block copolymer elastomers, styrene / butadiene / styrene block copolymer elastomers, and styrene / isoprene / styrene block copolymers. Examples thereof include elastomers and hydrogenated styrene / ethylene / butylene / styrene block copolymer elastomers and styrene / ethylene / propylene / styrene block copolymer elastomers. In the hydrogenated block copolymer, the hydrogenation rate is preferably 80% or more. These may be used alone or in combination of two or more.

  Specifically, the olefin elastomer is a random or block copolymer of two or more α-olefins selected from ethylene, propylene, 1-butene, 4-methyl-1-pentene, 1-octene, and the like. And those having a low crystallinity or non-crystallinity of less than 50% and an MFR in the range of 20 to 100 g / 10 min, preferably 50 to 80 g / 10 min. Specifically, as an olefin-based elastomer, an α-olefin random copolymer such as an ethylene / propylene random copolymer elastomer, an ethylene / 1-butene random copolymer elastomer, and a propylene / 1-butene random copolymer elastomer is used. And block copolymer elastomer of α-olefin such as ethylene / propylene block copolymer elastomer, ethylene / 1-butene random block copolymer elastomer, and propylene / 1-butene random block copolymer elastomer It is done.

  When the fiber containing the elastomer contains a resin other than the elastomer, the resin is preferably an olefin resin. Examples of the olefin resin include polypropylene, polyethylene, ethylene-α-olefin copolymer, propylene-α-olefin copolymer, ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, and ethylene- (meth). An acrylic acid copolymer and an ethylene-methyl (meth) acrylate copolymer. These resins are preferably used because of their good moldability. These resins can also be used to adjust the stretchability of the fiber by preventing the fiber containing the elastomer from excessively stretching.

  These resins can also function well from the viewpoint of reducing the tackiness (adhesiveness) of the nonwoven fabric containing elastomer fibers. The decrease in tackiness is required for smooth feeding when the laminate is once wound on a roll and then fed out and used in the production of the covering sheet. Furthermore, these resins exhibit the effect of increasing the melting point of the fibers constituting the elastomer nonwoven fabric and making the nonwoven fabric difficult to cure in the drying process. Alternatively, a resin other than the olefin resin, for example, a polyester resin, a polyamide resin, or an acrylic resin may be used together with the elastomer.

  When the fiber containing an elastomer contains a resin other than the elastomer, the ratio is preferably 70% by mass or less. If the ratio of the resin other than the elastomer exceeds 70% by mass, good stretchability may not be obtained in the covering sheet. When the fiber which comprises an elastomer nonwoven fabric is formed with 2 or more resin, a fiber may be a composite form, for example, may be a core-sheath type composite fiber, a split type composite fiber, or a sea-island type composite fiber. Alternatively, the fiber may be a single fiber made of a mixed resin.

  The long fiber nonwoven fabric may be a mixture of fibers containing an elastomer and fibers not containing an elastomer. The proportion of such fibers is preferably selected so that the fibers containing the elastomer occupy 30% by mass or more of the long-fiber nonwoven fabric. The reason is as described above. The fiber not containing an elastomer is a synthetic fiber formed from a resin other than an elastomer, or a natural fiber or a regenerated fiber as described above.

  Examples of the long fiber nonwoven fabric using fibers containing the elastomer include a spunbond nonwoven fabric. A spunbonded nonwoven fabric can be spun by mixing or combining an elastomer with a fiber itself, and can also be spun by mixing an elastomer fiber and a fiber not containing an elastomer.

  Examples of the long-fiber nonwoven fabric using the fiber containing the elastomer include a process-orthogonal laminated fiber nonwoven fabric. In the warp-orthogonal laminated fiber nonwoven fabric, fibers containing an elastomer may be arranged in the warp direction and / or the weft direction so that predetermined stretchability is obtained in one direction.

  Examples of the long fiber nonwoven fabric satisfying the stretchability and extensibility include a spunbond nonwoven fabric. Since the spunbond nonwoven fabric forms an embossed portion, excessive expansion and contraction at the time of low elongation of about 5 to 20% can be suppressed, and fit when applied to the skin can be realized. The area ratio of the embossed part to the entire area of the nonwoven fabric surface is preferably 5 to 30%. More preferably, it is 10 to 25%. Within such a range, not only have appropriate stretchability and extensibility, but also good entanglement with staple fibers.

  In addition, examples of the long-fiber nonwoven fabric satisfying the stretchability and extensibility include a background-orthogonal laminated fiber nonwoven fabric. Since the cross-laminated laminated nonwoven fabric is self-adhering, it is possible to suppress excessive expansion and contraction at the time of low elongation of about 5 to 20%, and to realize fit when it is applied to the skin.

  The form of the nonwoven fabric is not particularly limited as long as it is a long-fiber nonwoven fabric satisfying the stretchability and extensibility. For example, the nonwoven fabric itself may be provided with stretchability by shape by forming wrinkles, streaks, irregularities, and the like. When stretchability is imparted by such a non-woven fabric shape, it is possible to suppress a decrease in manufacturing processability due to an elastomer-specific tack.

  The long fiber nonwoven fabric preferably has a long fiber fineness of 0.5 to 10 dtex. More preferably, it is 1 to 6 dtex, and even more preferably, 2 to 4.4 dtex. Within this range, the texture is soft and the entanglement with the staple fibers is good.

  The long-fiber nonwoven fabric preferably has an elongation recovery rate of 60% to 100% when stretched in 20% in one direction and a stretch recovery rate of 5% to 75% when stretched 20% in a direction perpendicular to one direction. . A more preferable elongation recovery rate of the long-fiber nonwoven fabric is 70 to 95% in one direction and 10 to 70% in a direction orthogonal to the one direction. This is because if the elongation recovery rate of the long-fiber nonwoven fabric is within the above range, a predetermined elongation recovery rate can be obtained even for a laminate entangled with staple fibers.

  The long-fiber nonwoven fabric has a stress at a stretch of 20% in one direction of 0.1 to 10 N / 5 cm, and a stress at a stretch of 20% in a direction orthogonal to the one direction is 0.5 to 40 N / 5 cm. Is preferred. The more preferable elongation stress of the long fiber nonwoven fabric is 0.5 to 9 N / 5 cm in one direction, and 1 to 35 N / 5 cm in a direction orthogonal to the one direction. This is because when the stress at the time of elongation of the long-fiber nonwoven fabric is within the above range, a predetermined stress at the time of elongation can be obtained even for a laminate entangled with staple fibers.

  Next, the fiber layer will be described. The fiber layer is a fiber layer made of staple fibers having a fiber length of 25 to 80 mm, and is laminated with the long fiber nonwoven fabric to form a surface layer. The fiber length of the staple fiber is preferably 35 to 70 mm. When the fiber length is within the above range, the entanglement with the long-fiber non-woven fabric is good when the hydroentanglement treatment is performed, and the touch is also preferable without feeling tingling.

  Examples of fibers used in the fiber layer include natural fibers such as cotton, hemp, bamboo, kapok, kenaf, silk, and wool, regenerated fibers such as viscose rayon, cupra, and solvent-spun cellulose fibers, and semi-synthetic fibers. , Polyethylene, polypropylene, polymethylpentene, ethylene-propylene copolymer, etc., ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic acid copolymer, ethylene- (meth) Examples thereof include polyolefin fibers composed of a methyl acrylate copolymer, polyester fibers composed of polyethylene terephthalate or polybutylene terephthalate, polyamide fibers composed of nylon 6 or nylon 66, and synthetic fibers such as acrylic fibers.

  The fiber layer preferably contains cellulosic fibers. Since the cellulosic fiber has water absorbability, it is preferable that the cellulosic fiber retains wettability to the skin when formed on the surface of the sheet. The term “cellulosic fiber” is used to represent one type when classified by the main component, regardless of the production process.

  A suitable cellulosic fiber for constructing the sheet of the present invention is cotton. Cotton has a long history of use as a natural material and is widely used as a material for clothing, underwear and hygiene materials, giving the general consumer the impression that it is skin-friendly, tactile and safe. ing. Therefore, the use of cotton can provide a product that is more easily accepted by consumers.

  As the cotton, those generally used for nonwoven fabric production can be arbitrarily used. Specifically, cotton having a fiber length (average fiber length) of about 25 to 60 mm can be used. The cellulosic fiber layer may include a plurality of cottons having different fiber lengths and types. In the case of taking the configuration of the sheet of the present invention, the cellulosic fiber layer in which the cotton having a long fiber length and the cotton having a short fiber length are mixed is a fiber layer composed only of a fiber having a long fiber length (generally giving a better tactile sensation) Give the same feel. The reason is not clear, but this allows the use of cheap cotton. For example, the cellulosic fiber layer may include, for example, cotton (eg, combed cotton) having a fiber length of about 10 mm.

  Alternatively, rayon is also preferably used as the cellulosic fiber. The fineness of the rayon is preferably from 0.5 to 3.3 dtex, and more preferably from 0.9 to 2.2 dtex. Rayon is preferably used because it has excellent water absorption and is industrially produced and easily available as a uniform fiber.

  The fiber layer contains 10% by mass or more, preferably 20-80% by mass of cellulosic fibers. Within the above range, good tactile sensation, liquid absorption and liquid retention can be obtained. Alternatively, by using cellulosic fibers, the reason why a sheet having a soft touch feeling is obtained with less irritation to the skin is that the cellulosic fibers form a cosmetic layer on the fiber surface and / or sheet surface. It is inferred. The cosmetic layer is considered to be formed by cellulosic fibers having higher hydrophilicity and water absorption than synthetic fibers. This cosmetic layer is in direct contact with the skin, preventing or making it difficult for the fibers to be in direct contact with the skin. As a result, the fibers are separated by the cosmetic, and the fibers are in a state of floating from the cosmetic, making it difficult to irritate the skin. On the other hand, synthetic fibers are generally hydrophobic and not easily compatible with cosmetics. For this reason, even after the cosmetic is impregnated into the sheet, the tip of the synthetic fiber is easily exposed without being covered with the cosmetic, and the exposed tip protrudes from the sheet, which is likely to give the skin a tingling sensation.

  Cellulosic fibers also have a high ability to retain liquid once absorbed or deposited. Therefore, the coated sheet of the present invention can hold a large amount of a relatively low viscosity cosmetic.

  In the covering sheet of this invention, the liquid absorption property and liquid retention property of a cellulosic fiber can be utilized. Therefore, the sheet | seat of this invention can hold | maintain the same amount of cosmetics, even if a fabric weight is made small compared with the sheet | seat which comprised the fiber layer only with the synthetic fiber, for example. This makes it possible to provide a thin skin-covering sheet, and thus, for example, a larger number of sheets can be accommodated in a package of a given volume.

  The fiber layer may include fibers other than cellulosic fibers and cellulosic fibers. For example, natural fibers other than synthetic fibers and cellulosic fibers may be included. The fineness of fibers other than cellulosic fibers is not particularly limited, and preferably has the same fineness as that of cellulosic fibers. More specifically, the non-cellulosic fibers preferably have a fineness of 0.1 to 3.3 dtex, and more preferably have a fineness of 0.5 to 2.2 dtex.

  The fiber layer also preferably includes ultrafine fibers having a fineness of 0.5 dtex or less. The ultrafine fibers are more preferably formed by splitting (dividing) split-type composite fibers. This is because when the split-type composite fiber is used, ultrafine fibers are formed by a high-pressure water stream, and the ultrafine fibers are intertwined closely to obtain a dense fiber layer. The fineness of the ultrafine fiber is more preferably 0.05 to 0.3 dtex.

  A fiber layer containing ultrafine fibers (hereinafter also referred to as “ultrafine fiber layer”) gives a dense and smooth surface, hardly irritate the skin, and gives a good tactile sensation.

  When the split-type conjugate fiber is used, the split-type conjugate fiber is preferably contained at 30% by mass or more, more preferably 50% by mass or more in the ultrafine fiber layer before the hydroentanglement treatment. In the ultrafine fiber layer after the hydroentanglement treatment, the split-type composite fiber does not need to be completely divided into each component, for example, only a part of the component may be divided, or the ultrafine fiber is completely However, one or a plurality of ultrafine fibers may be branched from one split type composite fiber. As described above, when the division of the ultrafine fiber in the split type composite fiber is stopped halfway, it may be difficult to obtain the ratio of the ultrafine fiber in the ultrafine fiber layer. In consideration of this, it should be noted that in the above, the coated sheet of the present invention is specified by the ratio of the split type composite fibers before hydroentanglement.

  In the case where the ultrafine fibers are formed by splitting the split-type composite fibers, whether or not the ultrafine fibers are included in the coated sheet to the extent that the desired effect (for example, surface smoothness) is provided is determined. This can be confirmed by observing the cross section with a microscope or the like. For example, when the sheet is cut along a line parallel to the width direction, and the cross section of the ultrafine fiber layer including the skin contact surface is observed by magnifying 300 times with an electron microscope, the width direction of the sheet is 400 μm. X If 10 or more ultrafine fibers are observed in the region of 200 μm in the thickness direction of the sheet, the effect brought about by the ultrafine fiber layer can be obtained.

  The split-type conjugate fiber has at least one component divided into two or more components in the fiber cross section, and at least a part of the component is exposed on the fiber surface, and the exposed portion is continuous in the length direction of the fiber. It has a fiber cross-sectional structure that is formed. Preferable combinations of polymers constituting the split-type composite fibers are polyethylene terephthalate / polyethylene, polyethylene terephthalate / polypropylene, polyethylene terephthalate / ethylene-propylene copolymer, polypropylene / polyethylene, polyethylene terephthalate / nylon, and the like.

  The ultrafine fiber layer may include fibers other than the ultrafine fibers. For example, synthetic fibers, regenerated fibers or natural fibers having a fineness greater than 0.5 dtex may be included.

  As a preferable formulation of the fiber layer, the cellulosic fiber is 70 to 30% by mass, and the split type composite fiber is 30 to 70% by mass. More preferably, the cellulosic fiber is 40 to 60% by mass, and the split type composite fiber is 60 to 40% by mass. When the cellulosic fiber and the split-type composite fiber are within the above range, both liquid absorbency and touch can be achieved.

The basis weight of the fiber layer is preferably 10 to 160 g / m ^{2 on} at least one surface. Basis weight of more preferred fiber layer is 15~120g / m ^2. If the basis weight of the fiber layer is less than 10 g / m ² , the thickness of the fiber layer becomes small. Therefore, when the long fiber nonwoven fabric is exposed on the surface and comes into contact with the skin, irritation may be given. If the basis weight of the fiber layer exceeds 160 g / m ² , the entanglement between the fibers may be insufficient. On the other hand, when the basis weight of the ultrafine fiber layer exceeds 160 g / m ² , the basis weight of the covering sheet is increased, and there may be a feeling of pressure when it is in close contact with the skin.

  The form of the fiber layer is not particularly limited, but is preferably a card web such as a parallel web, a cross web, a semi-random web, and a random web. When the card web is used, a fiber layer having a uniform texture, bulky, and soft to the touch can be obtained.

Next, the covering sheet of the present invention formed by laminating each layer will be described together with its manufacturing method. The coated sheet of the present invention is laminated on one or both sides of the long-fiber nonwoven fabric so that the fiber layer becomes the surface, and the long-fiber nonwoven fabric and the staple fiber are hydroentangled and integrated. The covering sheet of the present invention has a weight per unit area within the above preferred range, and has a weight per unit area within the range of ^{20 to} 260 g / m ² , more preferably 50 to 180 g / m. having a basis weight in the range of m ² , even more preferably having a basis weight in the range of 60 to 140 g / m ² . When the basis weight of the covering sheet is small, the basis weight of any one or a plurality of layers may be small, and the desired effect (appropriate stretchability and extensibility) may not be obtained. When the basis weight of the covering sheet is large, any one layer or a plurality of basis weights may be large, and the desired effect may not be obtained.

  In the covering sheet of the present invention, at least one surface of the long fiber nonwoven fabric is covered with a fiber layer. Therefore, the appearance of at least one of the surfaces and the touch and texture of the surface are governed by the fiber layer made of staple fibers. When both surfaces of the sheet are composed of fiber layers, for example, the tackiness of the elastomer nonwoven fabric is not observed. In addition, as described above, the fiber layer gives good touch and wetness with less skin irritation when impregnated with cosmetics.

  The covering sheet of the present invention is manufactured using hydroentanglement processing. Below, the method of manufacturing the coating sheet of this invention using a hydroentanglement process is demonstrated.

  First, a laminated body is manufactured. The laminate is laminated on at least one surface of the long-fiber nonwoven fabric so that the fiber layer is at least one surface, and subjected to hydroentanglement treatment. The hydroentanglement process may be performed by a known method, and the conditions may be appropriately set according to the basis weight of the covering sheet to be finally obtained. In the hydroentanglement treatment, for example, a web is placed on a plain weave support of 80 to 100 mesh, and orifices having a hole diameter of 0.05 mm to 0.5 mm are provided at intervals of 0.3 mm to 1.5 mm. You may implement by injecting a water flow 1 MPa or more and 10 MPa or less from a nozzle 1 to 4 times each from the front and back side. In particular, when the hydroentanglement process is performed at a low water pressure of less than 7 MPa, the short fibers of the short fiber layer can be prevented from being exposed to the surface. After the hydroentanglement treatment, it is dried to remove moisture, and as a result, the skin-coated sheet for impregnating cosmetics of the present invention can be obtained.

  Next, the face mask of the present invention will be described. The face mask of the present invention is processed into a shape suitable for covering the face, and, for example, punched portions or cut portions are provided in portions corresponding to eyes, nose and mouth as necessary. Alternatively, the face mask may be processed into a shape that covers only a part of the face (for example, the eyes, mouth, nose, or cheek). Alternatively, the face mask may be provided as a set of sheets covering the periphery of the eyes and a sheet covering the periphery of the mouth, or may be provided as a set of sheets covering three or more portions separately. Such a set of two or more sheets facilitates the task of covering the entire face with a sheet. At this time, the one direction having the stretchability of the covering sheet of the present invention is obtained by stamping, cutting out, cutting and the like into a predetermined shape so as to be in the lateral direction of the face. By having a predetermined stretchability in the lateral direction of the face, the fit is good when applied while extending from the mouth to the nose or cheek.

  In the face mask of the present invention, the liquid cosmetic is preferably impregnated in the range of 200 to 2000 parts by mass, preferably 200 to 1500 parts by mass with respect to 100 parts by mass of the coated sheet of the present invention. By setting the amount of the liquid cosmetic within this range, a sufficient amount of the active ingredient can be supplied to the skin, and inconvenience during use such as dripping can be avoided. The optimal amount of the liquid cosmetic is appropriately determined according to the properties of the coated sheet, particularly the water absorption. In a preferred embodiment, the amount of the liquid cosmetic is adjusted so that the liquid cosmetic exceeding the saturation amount of the coated sheet exists during the set use time.

  The liquid cosmetic preferably contains, as an active ingredient, for example, a moisturizing component, a cleansing component, an antiperspirant component, a scent component, a whitening component, a blood circulation promoting component, an ultraviolet ray preventing component, a slimming component, etc. It may contain any component that is not expected to have a specific action on the skin.

  You may use the coating sheet of this invention for uses other than a face mask. For example, the coated sheet of the present invention impregnated with a liquid cosmetic containing a moisturizing component may be used by sticking to the neck, elbow or heel. Alternatively, the coating sheet of the present invention impregnated with a liquid cosmetic containing a slimming component may be used by being attached to the abdomen or thigh.

Hereinafter, the present invention will be described with reference to examples. In the following examples, physical properties were evaluated by the following methods.

[Tensile strength, elongation at break]
According to JIS L 1096 8.12.1 A method (strip method) (2006), using a constant-speed tension type tensile tester, the sample piece is 5 cm wide, 10 cm between grips, and 10 ± 3 cm / tensile speed. The sample was stretched under the condition of minutes, and the stress and elongation when the sample broke were measured.

[Elongation recovery rate at 20% extension]
According to JIS L 1096 8.23.1, the sample is stretched to a constant elongation L (mm) corresponding to 20% of the sample under the same conditions as the tensile strength and elongation described above, and then deweighted at the same speed. The film was stretched to a constant elongation again at the same speed, the residual elongation L1 (mm) was measured from the recorded load-elongation curve, and the elongation recovery rate was determined by {(L-L1) × 100} / L.

[Example 1]
A spunbonded nonwoven fabric (trade name Straflex PN5070, manufactured by Idemitsu Unitech Co., Ltd., 15% embossed area ratio) made of olefinic elastomer long fibers having a fineness of 3.5 dtex and a basis weight of 70 g / m ^{2 was} prepared as the long fiber nonwoven fabric. The tensile strength of this long fiber nonwoven fabric is 20 N / 5 cm in the machine direction and 14 N / 5 cm in the transverse direction, the elongation at break is 380% in the machine direction and 400% in the transverse direction, and the stress at 20% elongation is the machine direction. Was 1 N / 5 cm, and the lateral direction was 1 N / 5 cm.

As a fiber layer, a polyethylene terephthalate / polyethylene eight-part composite fiber (trade name DFS (SH), manufactured by Daiwabo Polytech Co., Ltd.) having a fineness of 2.2 dtex and a fiber length of 51 mm is 60% by mass, a fineness of 1.7 dtex, and a fiber. ^Two parallel card webs with a basis weight of 25 g / m ² were prepared by mixing 40% by mass of viscose rayon having a length of 40 mm (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.).

  The long fiber nonwoven fabric was sandwiched between the two fiber layers to form a laminate, and then subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water flow having a water pressure of 3.5 MPa is sprayed once on the surface of the laminated body using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm, and the water pressure is 4 MPa toward the inverted surface. The columnar water stream was jetted once. Next, the laminate after the hydroentanglement treatment was dried at 100 ° C. using an air-through heat treatment machine to obtain a coated sheet of the present invention.

[Example 2]
As a long fiber nonwoven fabric, a spunbonded nonwoven fabric (trade name Straflex UN5050, manufactured by Idemitsu Unitech Co., Ltd., 15% embossed area ratio) made of polyurethane long fibers having a fineness of 3.5 dtex and a basis weight of 50 g / m ² was prepared. The tensile strength of this long-fiber nonwoven fabric is 24 N / 5 cm in the machine direction and 18 N / 5 cm in the transverse direction, the elongation at break is 280% in the machine direction and 250% in the transverse direction, and the stress at 20% elongation is the machine direction. Was 5 N / 5 cm, and the lateral direction was 3 N / 5 cm.

As a fiber layer, ^two parallel card webs having the same constituent fiber as in Example 1 and a basis weight of 30 g / m ² are prepared, hydroentangled and dried by the same method as in Example 1, to obtain the coated sheet of the present invention. It was.

[Example 3]
As the fiber layer, 70% by mass of viscose rayon (trade name: Corona, manufactured by Daiwabo Rayon Co., Ltd.) having a fineness of 1.7 dtex and a fiber length of 40 mm, polyethylene terephthalate fiber (Toray Industries, Inc.) having a fineness of 1.45 dtex and a fiber length of 38 mm ^Two parallel card webs having a basis weight of 30 g / m ² were prepared by mixing 30% by mass of the above product.

  Except that the long fiber nonwoven fabric used in Example 2 was sandwiched between the two fiber layers, hydroentanglement treatment and drying were performed in the same manner as in Example 1 to obtain a coated sheet of the present invention.

[Comparative Example 1]
As a heat-bonding nonwoven fabric constituting the middle layer, a heat-bonded embossed nonwoven fabric with a basis weight of 30 g / m ² using polypropylene heat-bonding fibers (T-192, manufactured by Fiber Visions) with a fineness of 2.2 dtex and a fiber length of 51 mm was prepared. The tensile strength of the heat-bonded nonwoven fabric was 75 N / 5 cm in the longitudinal direction and 21 N / 5 cm in the lateral direction. The elongation of the heat-bonded nonwoven fabric was 80% in the vertical direction and 90% in the horizontal direction.

As a fiber layer, 80% by mass of a viscose rayon fiber (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.) having a fineness of 1.7 dtex and a fiber length of 40 mm, and a polyethylene terephthalate fiber (Toray Industries, Inc.) having a fineness of 1.45 dtex and a fiber length of 38 mm ^Two semi-random card webs having a basis weight of 30 g / m ² were prepared by mixing 20% by mass).

  The thermal adhesive nonwoven fabric was sandwiched between the two fiber layers to form a laminate, and then hydroentangled and dried in the same manner as in Example 1 to obtain a comparative coated sheet.

[Comparative Example 2]
As a long fiber nonwoven fabric, a spunbond nonwoven fabric (trade name: Stratec, manufactured by Idemitsu Unitech Co., Ltd.) made of polypropylene long fibers having a fineness of 3 dtex and a basis weight of 15 g / m ² was prepared. The tensile strength of this long fiber nonwoven fabric is 19 N / 5 cm in the machine direction and 12 N / 5 cm in the transverse direction, the elongation at break is 49% in the machine direction and 54% in the transverse direction, and the stress at 20% elongation is the machine direction. Was 8.1 N / 5 cm, and the lateral direction was 4.8 N / 5 cm.

As the fiber layer, ^two semi-random card webs having a basis weight of 35 g / m ² made of 100 mass of viscose rayon fiber (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.) having a fineness of 1.7 dtex and a fiber length of 40 mm were produced.

  The long fiber nonwoven fabric was sandwiched between the two fiber layers to form a laminate, and then hydroentangled and dried in the same manner as in Example 1 to obtain a comparative coated sheet.

  Table 1 shows the physical properties of Examples 1-3 and Comparative Examples 1-2.

  In the nonwoven fabrics of Examples 1 to 3, the stress at 20% elongation in one direction (lateral direction) and the stress at 20% elongation in the direction orthogonal to one direction (longitudinal direction) are compared with those of Comparative Examples 1 and 2. Since it is small, the extensibility is good. In addition, the nonwoven fabrics of Examples 1 to 3 have a predetermined elongation recovery rate at 20% elongation in one direction (transverse direction) and an elongation recovery rate at 20% elongation in a direction orthogonal to one direction (longitudinal direction). Since the range is satisfied, the stretchability is also good.

  The nonwoven fabrics of Examples 1 to 3 and Comparative Examples 1 and 2 are punched into the shape of the face so that the lateral direction (CD direction) coincides with the lateral direction of the face, and incisions are made at locations corresponding to the eyes, mouth and nose. It was put into a face mask shape. Fold it once with a vertical line that passes through the center of the face (a line parallel to the direction of the nose), fold once with a vertical line that passes through the center, and then fold it once with a horizontal line that passes through the center and fold it into eight I made it. Put the folded sheet into a polyethylene bag with an A6 size zipper, and then use “Poons Double White Fresh Lotion (Daytime)” manufactured by Unilever Japan as a liquid cosmetic. 700 parts by mass were injected with respect to 100 parts by mass of the material, and chucked so that air could not enter as much as possible. Next, the polyethylene bag containing the sheet and the liquid cosmetic was placed on a desk and pressed from the top of the bag with the palm five times, and then the polyethylene bag was opened and the sheet was taken out to evaluate the liquid impregnation property. The face mask using the nonwoven fabrics of Examples 1 to 3 was sufficiently impregnated with the liquid cosmetic.

  Next, the face mask impregnated with the liquid cosmetic was attached to the face of the monitor while being stretched, and was closely adhered to the face for 20 minutes. The face masks produced using Examples 1 to 3 gave the monitor a sense of moderate skin stretching. In particular, when worn while stretching in the lateral direction of the face, the adhesion to the skin was good. The face masks produced using Comparative Examples 1 and 2 had a lower degree of sensation of skin stretching than other samples.

  The skin-coated sheet for impregnating cosmetics of the present invention is stretchable in at least one direction in a state in which the cosmetics are impregnated, and gives a good tactile sensation, so every part of the human body, particularly the entire face, nose, It is suitable for being applied to sensitive parts such as the eyes, mouth, and neck, and can be used specifically as a face mask.

Claims (9)

A laminate comprising a fiber layer made of staple fibers having a fiber length of 25 to 80 mm and a surface layer formed on at least one surface of a long fiber nonwoven fabric containing long fibers and stretchable in at least one direction. And
The long-fiber non-woven fabric and the fiber layer are integrated by hydroentangling the long fibers and staple fibers,
The stress at 20% elongation in one direction of the laminate is 0.5 to 10 N / 5 cm, the stress at 20% elongation in the direction orthogonal to the one direction is 5 to 40 N / 5 cm,
For the cosmetic impregnation, the elongation recovery rate at 20% elongation in one direction of the laminate is 60 to 95%, and the elongation recovery rate at 20% elongation in the direction orthogonal to the one direction is 10 to 75%. Skin covering sheet.   The skin covering sheet for cosmetics impregnation according to claim 1, wherein the long fiber nonwoven fabric is a spunbond nonwoven fabric.   The said long-fiber nonwoven fabric is a process orthogonal lamination | stacking fiber layer formed by laminating | stacking so that the arrangement direction of a filament may mutually orthogonally cross two unidirectional extending | stretching arrangement | sequence fiber layers by which the filament was arranged in one direction, and was extended | stretched. 2. A skin-covering sheet for impregnating cosmetics according to 1.   The skin covering sheet for cosmetics impregnation according to any one of claims 1 to 3, wherein the long fiber nonwoven fabric contains fibers containing a thermoplastic elastomer.   The skin covering sheet for cosmetics impregnation according to any one of claims 1 to 4, wherein the fiber layer includes ultrafine fibers formed by splitting split-type composite fibers.   The skin covering sheet for cosmetic impregnation according to any one of claims 1 to 5, wherein the fiber layer contains cellulosic fibers. Laminating a fiber layer composed of staple fibers having a fiber length of 25 to 80 mm on the surface of at least one surface of a long fiber nonwoven fabric containing long fibers and having elasticity in at least one direction;
In the hydroentanglement process, the laminated long fiber nonwoven fabric and the fiber layer are disposed so that the one direction becomes a direction (CD direction) orthogonal to the machine direction (MD direction), and hydroentanglement is performed to obtain long fibers. Long fibers and staple fibers constituting the nonwoven fabric and the fiber layer are entangled with each other and integrated;
including,
The stress at 20% elongation in one direction of the laminate is 0.5 to 10 N / 5 cm, the stress at 20% elongation in the direction orthogonal to the one direction is 5 to 40 N / 5 cm,
For the cosmetic impregnation, the elongation recovery rate at 20% elongation in one direction of the laminate is 60 to 95%, and the elongation recovery rate at 20% elongation in the direction orthogonal to the one direction is 10 to 75%. A method for producing a skin covering sheet. The stress at 20% elongation in one direction of the long-fiber nonwoven fabric is 0.1 to 10 N / 5 cm, the stress at 20% elongation in the direction orthogonal to the one direction is 0.5 to 40 N / 5 cm,
The elongation recovery rate at 20% elongation in one direction of the long-fiber nonwoven fabric is 60 to 100%, and the elongation recovery rate at 20% elongation in a direction orthogonal to the one direction is 5 to 75%. The manufacturing method of the skin coating sheet for cosmetics impregnation as described in any one of.   It is a skin coating sheet for cosmetics impregnation of any one of Claims 1-6, Comprising: The face mask formed by cutting the said one direction into a predetermined shape so that it may become the horizontal direction of a face.