WO2010064710A1

WO2010064710A1 - Skin-covering sheet for impregnation with cosmetic preparation, manufacturing method thereof, and face mask utilizing the same

Info

Publication number: WO2010064710A1
Application number: PCT/JP2009/070420
Authority: WO
Inventors: 彰彦川中; 弘子牧原; 寛之大方
Original assignee: ダイワボウホールディングス株式会社; ダイワボウポリテック株式会社
Priority date: 2008-12-05
Filing date: 2009-12-04
Publication date: 2010-06-10
Also published as: JP5272130B2; JPWO2010064710A1

Abstract

Provided are a skin-covering sheet for impregnation with a cosmetic preparation which has appropriate stretchiness when wet, and a face mask utilizing said sheet. A nonwoven fabric (2) is created by clustering fibers containing a thermoplastic elastomer on one side of a hydrophilic fiber layer (3) that comprises fibers which are 0.5‑20 mm long and contains 50 mass% or more of hydrophilic fibers. A laminate (4) is created by bonding the hydrophilic fiber layer with the nonwoven fabric using the fibers that contain the thermoplastic elastomer. An ultrafine fiber layer (5) containing 10% by mass or more of ultrafine fibers having a fineness of 0.5 dtex or less is formed by placing a fiber web containing 50% by mass or more of splittable composite fibers on at least one surface of the laminate and then applying hydroentangling and splitting the splittable composite fibers. The laminate and the ultrafine fiber layer are integrated, and thus the skin-covering sheet (1) for impregnation with a cosmetic preparation that is obtained has stress of 0.20‑3.0N/5 cm when stretched 25% after stretching 30% in at least one direction.

Description

Skin covering sheet for impregnating cosmetics, method for producing the same, and face mask using the same

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 JP-A-2006-110696 (Patent Document 2), a liquid sustained-release layer B and a skin contact layer C are laminated in this order on at least one surface of a liquid holding layer A that can be impregnated with a liquid, The liquid sustained-release layer B is a porous sheet having an average pore diameter (P _B ) in the range of 1 μm to 40 μm, and the skin contact layer C has an average pore diameter (P _C ) of the liquid sustained-release layer B. A laminate for a liquid-impregnated sheet for personal use, which is a fiber assembly layer larger than the average pore diameter (P _B ), has been proposed. This laminate can apply or penetrate a certain amount of liquid over the skin over a long period of time.

JP-T-2003-507597 (Patent Document 3) proposes a method for producing a composite nonwoven fabric for storing and storing liquid. The manufacturing method described in this publication is a method of manufacturing a composite nonwoven fabric for containing and storing a liquid or the like, the composite nonwoven fabric being brought into close contact, for example, hydrodynamically. A thin intermediate layer comprising fine fibers in a method of forming a substrate nonwoven fabric and a pulp layer, such as a wood pulp fiber layer, which is placed on and brought into firm contact with the substrate nonwoven fabric For example by a melt blown process, characterized in that the pulp fibers are first fed onto this intermediate layer and bonded together.

Recent consumers tend to seek stretchability 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 2006-110696 A Special table 2003-507597 gazette

As described above, it is already known that the skin covering sheet for impregnating cosmetics is required to have elasticity. 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, since the skin covering sheet impregnated with the cosmetic is finally used by including the cosmetic, it is required to exhibit stretchability in a wet state. 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). .

An object of the present invention is to provide a skin-covering sheet for impregnating a cosmetic material having an appropriate stretchability in a wet state, and a face mask using the same.

As a result of repeated investigations, the inventors applied a predetermined tensile test, and after pulling to achieve a predetermined elongation rate, the load was relaxed, and the stress when the predetermined elongation rate was reached It has been found that designing the stretchability (elastic recovery property) in at least one direction so as to be within a predetermined range gives the user a feeling of comfortable skin stretching. Furthermore, the present inventors have studied a configuration of a nonwoven fabric in which such stretchability is exhibited even after holding the cosmetic and a good tactile sensation is secured when it comes into contact with the skin. As a result, moderate stretchability and good tactile sensation are obtained by forming a laminated structure in which an ultrafine fiber layer is arranged on both surfaces of a laminate composed of a hydrophilic fiber layer containing hydrophilic fibers and a stretchable nonwoven fabric. The present inventors have found that a skin-coated sheet for impregnating cosmetics can be obtained, and have reached the present invention.

The present invention
A laminate in which a hydrophilic fiber layer containing 50% by mass or more of hydrophilic short fibers is laminated on at least one surface of a stretchable nonwoven fabric containing fibers containing a thermoplastic elastomer, and laminated on at least one surface of the laminate. And an ultrafine fiber layer containing 10% by mass or more of ultrafine fibers having a fineness of 0.5 dtex or less,
A sheet in which the ultrafine fiber layer and the laminate are integrated by interlacing the fiber containing the thermoplastic elastomer, the hydrophilic fiber, and the ultrafine fiber,
In accordance with JIS L 1096 8.12.2 A method (wet, strip method) (2006), using a constant speed tension type tensile tester, a wet sample piece is 5 cm wide and 20 cm in gripping interval. Immediately after being stretched at a tensile speed of 10 ± 3 cm / min and stretched 30%, at the same speed, when subjected to a tensile test that gradually narrows the grip interval, 25% stretch after 30% stretch in at least one direction The stress sometimes measured is 0.20 N / 5 cm or more and 3.0 N / 5 cm or less,
A skin-coated sheet for impregnating cosmetics is provided.

The skin-coated sheet for impregnating cosmetics of the present invention (hereinafter sometimes simply referred to as “coated sheet” or “sheet”) is an elastic nonwoven fabric containing fibers containing a thermoplastic elastomer (hereinafter referred to as “elastomer nonwoven fabric”). A non-woven fabric having a hydrophilic fiber layer containing 50% by mass or more of hydrophilic fibers and having an ultrafine fiber layer disposed on at least one surface of the sheet when it is wet. It is characterized in that at least one-way return 25% elongation stress is within a predetermined range. In this sheet, it is considered that the elastomer nonwoven fabric imparts stretchability to the entire sheet, the hydrophilic fiber layer contributes to the retention of the cosmetic, and the ultrafine fiber layer provides a dense and smooth surface. In addition, a sheet in which the nonwoven fabric and the fiber layer are combined and the return stress in at least one direction in a wet state is within the above-described range is 25%. After the sheet is impregnated with an appropriate amount of elasticity, Also demonstrates.

In the coated sheet of the present invention, the elastomer nonwoven fabric is preferably a melt blown nonwoven fabric. Since the melt blown nonwoven fabric is provided with a relatively small basis weight, it is conveniently used to achieve the predetermined stretchability in combination with other fiber layers.

In the coated sheet of the present invention, the elastomer nonwoven fabric preferably includes fibers containing a styrene-based elastomer. Styrenic elastomers are preferably used because they are excellent in chemical resistance and weather resistance.

In another aspect, the present invention also provides an initial return stress ratio (25% return elongation stress (%) / 30% elongation stress (%)) of 0.15 when dry (standard state) and / or when wet. A skin-coated sheet for impregnating cosmetics as described above is provided. The cosmetic-impregnated skin-covered sheet having such an initial return stress ratio provides an effect that the skin is picked up while being in close contact with the sheet, that is, a lift-up effect during use.

The coated sheet of the present invention is
A fiber containing thermoplastic elastomer is accumulated on one surface of a hydrophilic fiber layer containing 50% by mass or more of hydrophilic fibers to form a nonwoven fabric, and the accumulated fiber containing thermoplastic elastomer that is melted or softened Adhering a hydrophilic fiber layer and a nonwoven fabric containing fibers containing a thermoplastic elastomer to obtain a laminate,
Including laminating a split composite fiber web containing 50% by mass or more of split composite fibers on at least one surface of the laminate to obtain a multilayer laminate, and subjecting the multilayer laminate to hydroentanglement treatment. It can be manufactured by a manufacturing method. Here, the term “multilayer laminate” is used to distinguish between a laminate comprising an elastomer nonwoven fabric and a hydrophilic fiber layer and a laminate in which a split type composite fiber web is laminated on the laminate. .

In this production method, a laminate in which a hydrophilic fiber layer and an elastomer nonwoven fabric are integrated is first prepared, and then a split-type composite fiber web is laminated on at least one surface of the laminate, and subjected to hydroentanglement treatment. The fibers are entangled at the same time as the ultrafine fibers are formed. In this manufacturing method, a laminate comprising a hydrophilic fiber layer and an elastomer nonwoven fabric is supplied as an independent sheet material. Therefore, according to this manufacturing method, it is easy to obtain a covering sheet in which the boundaries between the layers are relatively clear.

In the production method of the present invention, it is preferable to form a laminate by fiberizing a resin containing a thermoplastic elastomer by a melt blown method. According to this method, a laminate in which the elastomer nonwoven fabric is a meltblown nonwoven fabric can be easily obtained.

The present invention also provides a face mask in which the liquid cosmetic is impregnated at a ratio in the range of 200 parts by mass to 2000 parts by mass with respect to 100 parts by mass of the covering sheet of the present invention.

The coated sheet of the present invention has a laminated structure including at least three layers of an ultrafine fiber layer / hydrophilic fiber layer / elastomer nonwoven fabric, and in a wet state, a return 25% elongation stress of 0.20 N in at least one direction. / 5 cm or more and 3.0 N / 5 cm or less. When such a covering sheet is applied to the skin while being stretched in a state in which the cosmetic is impregnated, it adheres well to the skin and gives the user a feeling of comfortable skin stretching. Furthermore, in the coated sheet of the present invention, a smooth and dense ultrafine fiber layer is present on at least one surface, so that a good tactile sensation is ensured.

In the method for producing a coated sheet of the present invention, a laminate in which a hydrophilic fiber layer and an elastomer nonwoven fabric are integrated is first prepared, and then a split-type composite fiber web is laminated on the laminate, and then hydroentangled. Process. This manufacturing method makes it possible to manufacture a sheet including at least three layers so that the function of each layer is exhibited well. Further, in this production method, the laminated composite fiber web is laminated while pulling the laminate, and when the hydroentanglement treatment is performed, the laminate is less likely to be narrowed, and the coated sheet of the present invention is stably produced. Makes it possible to manufacture.

In the face mask of the present invention, the coating sheet of the present invention having stretchability is impregnated with a liquid cosmetic. This face mask adheres well to the face and is not easily peeled off, and the stress that occurs when the stretched sheet elastically recovers makes the user feel the skin stretches comfortably, and the cheek and chin skin are lifted comfortably Give a sense. Therefore, the face mask of the present invention allows the user to realize that the predetermined active ingredient in the liquid cosmetic is applied to the skin and wrinkles and sagging are reduced during use.

It is sectional drawing which shows typically the skin coating sheet for cosmetics impregnation of this invention.

As shown in FIG. 1, the coated sheet (1) of the present invention comprises a hydrophilic fiber containing 50% by mass or more of hydrophilic fiber on at least one surface of a stretchable nonwoven fabric (2) containing a fiber containing a thermoplastic elastomer. 10% by mass or more of the laminate (4) obtained by laminating the layer (3) and the ultrafine fibers having a fineness of 0.5 dtex or less laminated on at least one surface (both sides in FIG. 1) of the laminate It is comprised from the containing ultrafine fiber layer (5). Here, the term “surface” refers to the main surface (surface perpendicular to the thickness direction) of the nonwoven fabric or layer.

[Laminate]
First, a stretchable nonwoven fabric (hereinafter also referred to as “elastomer nonwoven fabric”) including fibers containing a thermoplastic elastomer, which is one layer of the laminate, will be described. The fiber containing the thermoplastic elastomer is preferably made of a resin containing 30% by mass or more of the thermoplastic elastomer, more preferably a resin containing 50% by weight or more of the thermoplastic elastomer. Or the fiber containing a thermoplastic elastomer may consist only of thermoplastic elastomers.

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 elastomer nonwoven fabric is preferably composed of fibers containing a styrene-based elastomer. Styrenic elastomer has good chemical resistance, weather resistance, and moldability, and when the coated sheet of the present invention is manufactured by the manufacturing method described later, when integrated with the hydrophilic fiber layer, By functioning well as an adhesive component.

The styrene 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.

The olefin elastomer is specifically 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 a low crystalline or amorphous material having a crystallinity of less than 50% and an MFR in the range of 20 to 100 g / 10 minutes, preferably 50 to 80 g / 10 minutes. Specifically, random copolymer of α-olefin such as ethylene / propylene random copolymer elastomer, ethylene / 1-butene random copolymer elastomer, and propylene / 1-butene random copolymer elastomer is used as the olefin elastomer. And block copolymer elastomers of α-olefins such as ethylene / propylene block copolymer elastomers, ethylene / 1-butene random block copolymer elastomers, and propylene / 1-butene random block copolymer elastomers. 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). Acrylic acid copolymer, ethylene-methyl (meth) acrylate copolymer. These resins have good moldability and function well from the viewpoint of reducing the tackiness (adhesiveness) of the elastomer nonwoven fabric. 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 elastomer nonwoven fabric difficult to cure in the drying step. 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 thermoplastic elastomer.

When the fiber containing the 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.

When the elastomer nonwoven fabric includes fibers that do not contain an elastomer, the ratio of such fibers is preferably selected so that the elastomer resin occupies 30% by mass or more of the elastomer 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. The synthetic fiber elastomer nonwoven fabric is preferably formed only of fibers containing an elastomer.

The elastomer nonwoven fabric is composed of fibers containing an elastomer, or fibers containing an elastomer and fibers not containing an elastomer. The form of the elastomer nonwoven fabric is not particularly limited, and may be any of an air-through nonwoven fabric, a thermal bonding nonwoven fabric, a wet papermaking nonwoven fabric, an airlaid nonwoven fabric, a hydroentangled nonwoven fabric, a needle punched nonwoven fabric, a spunbonded nonwoven fabric, and a meltblown nonwoven fabric. The elastomer nonwoven fabric is preferably a meltblown nonwoven fabric or a spunbond nonwoven fabric, more preferably a meltblown nonwoven fabric. When the elastomer nonwoven fabric is a spunbond nonwoven fabric or a melt blown nonwoven fabric, when the coated sheet of the present invention is produced by the method described later, the hydrophilic fiber layer and the elastomer nonwoven fabric are bonded and integrated simultaneously with the production of the elastomer nonwoven fabric. And can be integrated with the hydrophilic fiber layer with an appropriate adhesive strength. The meltblown nonwoven fabric is more preferably used because it is a nonwoven fabric in which fibers with small fineness are uniformly distributed and is flexible.

The air permeability of the elastomer nonwoven fabric is preferably 10 cm ³ / cm ² · sec or more and 700 cm ³ / cm ² · sec or less, more preferably 100 cm ³ / cm ² · sec or more and 500 cm ³ / cm ² · sec or less. preferable. When the air permeability of the elastomer nonwoven fabric is less than 10 cm ³ / cm ² · sec, as will be described later, when the hydrophilic fiber layer, the elastomer nonwoven fabric and the ultrafine fiber layer are integrated by hydroentanglement treatment, the fibers are entangled. May become insufficient and the formation may be disturbed. When the air permeability of the elastomer nonwoven fabric exceeds 700 cm ³ / cm ² · sec, the cosmetic may be easily dried, or the texture may become hard and the stretchability may be reduced. Here, the air permeability is measured according to JIS L 1096 8.27.1A method (Fragile method) (2006).

The elastomer nonwoven fabric preferably has an elongation of 140% or more and 600% or less in at least one direction, and the elastomer nonwoven fabric more preferably has an elongation of 140% or more and 300% or less in at least one direction. In any direction, if the elongation is less than 140%, the user may not be given enough sensation that the skin is comfortably stretched while covering the skin with the sheet. In any direction, when the elongation of the elastomer nonwoven fabric exceeds 600%, the stress at the return 25% elongation of the covering sheet tends to increase in any direction, and the covering sheet does not have the desired stretchability. There is.

The elastomer nonwoven fabric is a constant speed tension type tensile tester according to JIS L 1096 8.12.1 A method (standard time, strip method) (2006). Immediately after being stretched at a tensile speed of 10 ± 3 cm / min and stretched 30%, at the same speed, when subjected to a tensile test that gradually narrows the grip interval, 25% stretch after 30% stretch in at least one direction The time stress (that is, the return stress at 25% elongation) is preferably 0.40 N / 5 cm or more and 3.0 N / 5 cm or less, and preferably has elasticity, 0.40 N / 5 cm or more and 1.3 N / 5 cm or less. It is more preferable to have elasticity. The stress measured at 25% elongation after 30% elongation is the stretch of the nonwoven fabric after 30% elongation and while returning the gripping interval (ie, bringing the two heads gripping the specimen closer together). It refers to the stress measured when the elongation is again 25%. When such an elastic nonwoven fabric having stretchability is used, it is possible to obtain a coated sheet in which the stress at the time of return 25% elongation in at least one direction is within the predetermined range in a wet state. Alternatively or in addition, the elastomer nonwoven fabric has a stress at 20% elongation after 30% elongation in at least one direction (that is, a stress at 20% elongation at return) of 0.10 N / 5 cm or more and 2.0 N / 5 cm or less. It preferably has stretchability, more preferably 0.1 N / 5 cm or more and 0.8 N / 5 cm or less.

Alternatively, or in addition, the elastomer nonwoven fabric has a stress at 20% elongation (hereinafter referred to as “going stress at 20% elongation”) of at least 0.50 N / 5 cm to 5.0 N / 5 cm before 30% elongation in at least one direction. It is preferable that it has the following elastic properties, more preferably 0.50 N / 5 cm or more and 2.7 N / 5 cm or less. If the stress at 20% elongation is within this range, especially when the coated sheet of the present invention is used as a face mask, the coated sheet is stretched and the surface of the face, nose, mouth, etc. It can be adhered.

When measuring the elasticity in any one direction of the elastomer nonwoven fabric, a test piece is prepared so that the direction becomes the tensile direction. The direction showing the stretchability may be any of the machine direction (longitudinal direction), the lateral direction (direction orthogonal to the machine direction when continuously manufactured), and an oblique direction of the elastomer nonwoven fabric. For example, when the skin covering sheet for impregnating cosmetics is a face mask, and the lateral direction of the covering sheet coincides with the lateral direction of the face (direction perpendicular to the nose), the “at least one direction” is an elastomer nonwoven fabric. It is preferable that the horizontal direction.

Hereinafter, a melt blown nonwoven fabric suitable for the elastomer nonwoven fabric constituting the coated sheet of the present invention will be specifically described. The average fiber diameter of the fibers is preferably about 0.5 to 30 μm, more preferably about 0.5 to 10 μm. It is difficult to make the fiber diameter less than 0.5 μm, and when it exceeds 30 μm, the texture becomes hard and the stretchability may be lowered. The average fiber diameter is obtained by observing an elastomer nonwoven fabric with an electron microscope at 50 to 500 times, selecting 20 fibers constituting the nonwoven fabric at random, measuring the fiber diameter, and calculating the average value. .

Air permeability of the meltblown non-woven ^fabric, 10 cm ^{3 /} cm preferably 2 · sec or more 500cm is ³ / ^cm 2 · sec or ^less, more be 50m ^{3 /} cm 2 · sec or more 300cm is ³ / ^cm 2 · sec or less Preferably, it is 100 m ³ / cm ² · sec or more and 300 cm ³ / cm ² · sec or less.

The elongation in at least one direction of the melt blown nonwoven fabric is preferably 140% or more and 600% or less, more preferably 140% or more and 450% or less, and more preferably 140% or more and 300% or less. It is more preferable to have a degree.

The return 25% elongation stress of the meltblown nonwoven fabric is preferably 0.40 N / 5 cm or more and 2.0 N / 5 cm or less, and more preferably 0.40 N / 5 cm or more and 1.5 N / 5 cm or less. More preferably, it is 0.40 N / 5 cm or more and 1.3 N / 5 cm or less.

Alternatively or in addition, the return 20% elongation stress of the nonwoven fabric is preferably from 0.1 N / 5 cm to 1.8 N / 5 cm, more preferably from 0.30 N / 5 cm to 1.5 N / 5 cm. Preferably, it is 0.40 N / 5 cm or more and 1.5 N / 5 cm or less.

Alternatively, or in addition, the 20% elongation stress of the meltblown nonwoven fabric is preferably 0.5 N / 5 cm or more and 5.0 N / 5 cm or less, and 0.8 N / 5 cm or more and 4.0 N / 5 cm or less. More preferably, it is 1.0 N / 5 cm or more and 2.7 N / 5 cm or less.

More specifically, the melt-blown nonwoven fabric having air permeability and stretchability is more preferably 50% by mass or more and 90% by mass or less of a styrene elastomer (particularly a hydrogenated styrene / isoprene / styrene block copolymer), a polyolefin-based It is preferably composed of fibers made of a resin mixed with 10% by mass or more and 50% by mass or less of a resin (particularly polypropylene resin) and has a basis weight of about 5 to 20 g / m ² .

The melt blown nonwoven fabric can be manufactured according to a usual method. As will be described later, the laminate before being integrated with the ultrafine fiber layer is a method of accumulating fibers on the hydrophilic fiber layer, and the production of the meltblown nonwoven fabric and the integration of the meltblown nonwoven fabric and the hydrophilic fiber layer are performed. It is preferable that they are obtained at the same time.

When the elastomer nonwoven fabric is a spunbond nonwoven fabric, the average fiber diameter is preferably about 7 to 50 μm, and more preferably about 10 to 25 μm. When the average fiber diameter exceeds 50 μm, the texture becomes hard and the stretchability may be lowered. As will be described later, the laminate before being integrated with the ultrafine fiber layer is a method of accumulating fibers on the hydrophilic fiber layer to produce a spunbond nonwoven fabric and to integrate the spunbond nonwoven fabric and the hydrophilic fiber layer. It is preferable that these are obtained simultaneously.

May take any form, basis weight of the elastomeric nonwoven fabric, it is preferably 5 g / ^{m 2} or more 50 g / ^{m 2} or less, more preferably 5 g / ^{m 2} or more 35 g / ^{m 2} or less, 5 g / m It is still more preferably ² or more and 25 g / m ² or less, and most preferably 5 g / m ² or more and 20 g / m ² or less. If the basis weight of the elastomer nonwoven fabric is less than 5 g / m ² , the stretchability of the covering sheet may not be sufficient, and if it exceeds 50 g / m ² , the return sheet will have a large 25% elongation stress in any direction. It may become too much.

Moreover, even if an elastomer nonwoven fabric takes any form, in any one direction of a nonwoven fabric, the distortion at the time of 100% expansion | extension is preferably less than 50%, More preferably, it is less than 40%. Here, the strain at 100% elongation is measured by the following method.
[Distortion at 100% elongation]
Using a constant-speed tension type tensile tester according to JIS L 1096 8.12.1 A method (strip method) (2006), a sample is 5 cm in width, 10 cm in gripping distance, and 10 ± in tensile speed. Gripping interval at the time when the elongation stress (return elongation stress) becomes zero after 100% elongation after 100% elongation at the same speed and gradually narrowing the grasping interval at 3 cm / min. The length L (cm) (three significant digits) is measured, and the strain at 100% elongation is obtained from the formula of strain (%) = {(L-10.0) /10.0} × 100.

Next, the hydrophilic fiber layer will be described. A hydrophilic fiber layer is a fiber layer containing 50 mass% or more of hydrophilic fibers. When the hydrophilic fiber is less than 50% by mass, the amount of the hydrophilic fiber in the entire coating sheet is reduced, and the amount of impregnation of the liquid cosmetic is reduced. The hydrophilic fiber is preferably contained in the hydrophilic fiber layer in an amount of 50% by mass or more, more preferably 70% by mass or more, and most preferably 100% by mass.

Hydrophilic fibers include natural fibers such as pulp, cotton, hemp, silk, and wool, regenerated fibers such as viscose rayon, cupra, and solvent-spun cellulose fibers, and synthetic fibers that have been subjected to hydrophilic treatment, etc. It is. Examples of the hydrophilic treatment include corona discharge treatment, sulfonation treatment, graft polymerization treatment, kneading of a hydrophilic agent into fibers, and application of a durable oil agent. The hydrophilic fiber is preferably a cellulosic fiber. Cellulosic fibers more specifically include 1) pulps such as mechanical pulp, regenerated pulp and chemical pulp, and 2) viscose rayon, cupra, and solvent-spun cellulose fibers (for example, lentung lyocell® and tencel) (Registered trademark)).

Pulp may be produced by a conventional method using coniferous wood or hardwood wood. In general, the fineness of pulp fibers is about 1.0 to 4.0 dtex and the fiber length is about 0.8 to 4.5 mm. However, pulp fibers having fineness and / or fiber length outside this range are used. May be. The hydrophilic fiber layer comprising pulp fibers can be provided as airlaid webs or wet nonwovens, or can be provided as flocculent pulp (fluff pulp).

When using regenerated fibers, the fineness is preferably about 0.5 to 6 dtex, more preferably about 0.5 to 5 dtex. When the fineness of the regenerated fiber is too small, the hydrophilic fiber layer becomes too dense, for example, as described later, when integrating the layers constituting the covering sheet by hydroentanglement treatment, water hardly passes, The hydrophilic fiber layer and / or the ultrafine fiber layer may be disturbed, and the surface state of the resulting coated sheet may be deteriorated. When the fineness of the regenerated fiber is too large, unevenness of formation increases, and when the layers constituting the covering sheet are integrated by the hydroentanglement process, the fibers may be entangled insufficiently.

The hydrophilic fiber layer may contain 50% by mass or less of non-hydrophilic fibers (that is, non-hydrophilic fibers). Non-hydrophilic fibers include, for example, polyethylene, polypropylene, polymethylpentene, or ethylene-propylene copolymer, ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic acid copolymer Synthesis of polyolefin, fiber made of ethylene-methyl (meth) acrylate copolymer, polyester fiber made of polyethylene terephthalate or polybutylene terephthalate, polyamide fiber made of nylon 6 or nylon 66, and acrylic fiber Fiber.

The hydrophilic fiber layer is generally a fiber web or a non-woven fabric before being integrated with the ultrafine fiber layer. Fiber webs are, for example, parallel webs, cross webs, semi-random webs and random card webs, air lay webs, wet paper webs, and spunbond webs. Nonwoven fabrics are formed using these fiber webs, and specifically, heat-through nonwoven fabrics such as air-through nonwoven fabrics and hot-roll nonwoven fabrics in which card webs or airlaid webs in which binder fibers are mixed with hydrophilic fibers are thermally bonded with binder fibers. Adhesive nonwoven fabric, wet nonwoven fabric obtained by entanglement or adhesion of wet papermaking web fibers (including tissue in which pulp is bonded by a binder and tissue in which pulp is bonded by hydrogen bonding), fibers in a fiber web Examples thereof include a needle punched nonwoven fabric entangled by a needle punch, a hydroentangled nonwoven fabric in which fibers in a fiber web are entangled by a high-pressure water stream, and the like. When using a hydrophilic non-woven fabric as the hydrophilic fiber layer, it is easier to make the surface of the coated sheet obtained by integrating with the ultrafine fiber layer smoother and denser than when using a hydrophilic fiber web, and therefore It is easy to form a liquid cosmetic thin film on the sheet surface.

The hydrophilic fiber layer is preferably provided in the form of a wet nonwoven fabric. This is because the wet nonwoven fabric can be subjected to continuous processing as an integrally held form. In general, wet nonwoven fabrics are low in volume (thin), and therefore have good entanglement with water flow and needles. Furthermore, wet nonwoven fabrics have little difference in physical properties due to differences in direction (longitudinal direction, lateral direction), and therefore, when the coated sheet of the present invention is subjected to cutting, in particular, due to the difference in blade direction, 1 It is possible to eliminate variation in the degree of “sag” between two contours, or to reduce variation.

The hydrophilic fiber constituting the wet nonwoven fabric is preferably a short fiber having a fiber length of 0.5 mm or more and 20 mm or less. Such hydrophilic fibers having a fiber length reinforce the entanglement between the ultrafine fiber layer and the hydrophilic fiber layer when the fibers are entangled by hydroentanglement treatment. When the hydrophilic fiber is a short fiber, the fiber length is more preferably from 0.8 mm to 10 mm, and even more preferably from 1 mm to 5 mm. In the hydrophilic fiber layer, the hydrophilic short fibers may all have the same length or may have different lengths. Further, when the hydrophilic fiber is a short fiber and the hydrophilic fiber layer further includes a non-hydrophilic fiber, the non-hydrophilic fiber is also preferably a short fiber. The average fiber length of the short fibers is measured according to JIS L1015 8.4.1 Method A (staple diagram method) (2006).

It is preferable that the hydrophilic fiber layer is a wet nonwoven fabric containing or consisting of pulp fibers. Pulp has a flat fiber cross section, and a wet nonwoven fabric containing this has a structure in which flat surfaces are laminated when hydroentangled, and the hydrophilic fibers are not easily exposed on the surface of the coated sheet, irritation to the skin. Since a structure that is difficult to give is imparted to the sheet, it is preferably used. A paper containing or consisting of pulp fibers includes a tissue (also called a tissue paper) as described above. A wet nonwoven fabric containing pulp fibers is preferably used because it increases the degree of entanglement when the fibers are entangled by hydroentanglement treatment. Moreover, when the wet nonwoven fabric containing a pulp fiber is used as a hydrophilic fiber layer, the rigidity of the resulting coated sheet in a dry state increases. Therefore, when a covering sheet is cut, in particular, a product having a sharp outline can be obtained without any outline. In addition, a coated sheet using a wet non-woven fabric containing pulp fibers as a hydrophilic layer is easy to be stretched during use because the stiffness in a wet state is smaller than the stiffness in a dry state.

The hydrophilic fiber layer containing pulp fibers may be composed only of pulp fibers, or may be composed of pulp fibers and other fibers. The other fibers may be cellulosic fibers or synthetic fibers other than pulp. Moreover, the said other fiber may be a short fiber which has a fiber length of 0.5 mm or more and 20 mm or less.

The basis weight of the hydrophilic fiber layer is preferably 5 g / m ² or more and 50 g / m ² or less. The basis weight of the hydrophilic fiber layer is more preferably 10 g / m ² or more and 40 g / m ² or less, and still more preferably 12 g / m ² or more and 30 g / m ² or less. If the basis weight of the hydrophilic fiber layer is less than 5 g / m ² , the liquid cosmetic cannot be sufficiently retained. When the basis weight of the hydrophilic fiber layer exceeds 50 g / m ² , the integrity of the hydrophilic fiber layer and the ultrafine fiber layer may be deteriorated, and the stretchability of the elastomer nonwoven fabric does not appear in the coated sheet, so The stretchability of the fiber layer may be dominant.

The elastomer nonwoven fabric and hydrophilic fiber layer of the laminate are bonded with fibers containing a thermoplastic elastomer before being integrated with the ultrafine fiber layer, and after being integrated with the ultrafine fiber layer, in part, It may be bonded by fibers containing a thermoplastic elastomer. In that case, the functions of the hydrophilic fiber layer and the elastomer nonwoven fabric are exhibited better. Or the laminated body to which the hydrophilic fiber layer and the elastomer nonwoven fabric have adhere | attached may exist in the state from which adhesion | attachment was cancelled | released, after integrating with an ultrafine fiber layer. Alternatively, the elastomeric nonwoven fabric and the hydrophilic fiber layer of the laminate may be independent of each other without being bonded and / or entangled and simply overlapped before being integrated with the ultrafine fiber layer.

The basis weight of the laminate is determined by selecting the basis weight of the elastomer nonwoven fabric and the hydrophilic fiber layer according to the basis weight of the ultrafine fiber layer and the covering sheet and the amount of the cosmetic to be impregnated. The basis weight of the laminate is, for example, preferably 10 to 100 g / m ² , more preferably 10 to 60 g / m ² , and still more preferably 20 to 40 g / m ² . If the basis weight of the laminate is too small, at least one of the elastomer nonwoven fabric and the hydrophilic fiber layer is uneven, and it is difficult to obtain good stretchability or liquid retention. If the basis weight of the laminate is too large, the cost increases and it is not economical. In addition, if the basis weight is too large, the fibers may not be easily entangled when the hydroentanglement process is performed.

The laminate may be one in which the hydrophilic fiber layer is located only on one surface of the elastomer nonwoven fabric, or may be one in which the hydrophilic fiber layer is located on both surfaces of the elastomer nonwoven fabric. Alternatively, the laminate may have a configuration of elastomer nonwoven fabric / hydrophilic fiber layer / elastomeric nonwoven fabric.

[Ultrafine fiber layer]
The ultrafine fiber layer contains 10% by mass or more of ultrafine fibers having a fineness of 0.5 dtex or less. The ultrafine fiber may be formed by, for example, a melt blown method, and in that case, the ultrafine fiber layer is a melt blown nonwoven fabric. In the present invention, the ultrafine fibers are preferably formed by splitting (dividing) split-type composite fibers. When split-type composite fibers are used, ultrafine fibers are formed by a high-pressure water stream, and the ultrafine fibers are intertwined closely to obtain a dense ultrafine fiber layer.

The ultrafine fiber layer gives a dense and smooth surface and, when impregnated with cosmetics, forms a thin film of cosmetics on the surface. This thin liquid film exists between the skin and the skin-coated sheet and reduces irritation to the skin (a tingling sensation). In addition, the smooth surface provided by the ultrafine fiber layer itself is less likely to irritate the skin and provides a good tactile sensation.

For example, in the case of forming ultrafine fibers by the melt blown method, in the case of forming by leaching the sea components of sea-island type composite fibers, and in the case of forming by dividing split type composite fibers, the fineness of the ultrafine fibers is It needs to be 0.5 dtex or less. A more preferable fineness of the ultrafine fiber is 0.4 dtex or less. When the fineness of the ultrafine fiber exceeds 0.5 dtex, the liquid cosmetic is retained in the inter-fiber gap on the surface of the covering sheet, and it may be difficult to form a liquid cosmetic thin film on the surface of the covering sheet. The lower limit of the fineness of the ultrafine fiber is not particularly limited, but it is preferably 0.05 dtex or more in consideration of the wear resistance of the surface of the covering sheet.

When using split-type conjugate fibers, the split-type conjugate fibers are preferably contained in an ultrafine fiber layer before splitting treatment (for example, hydroentanglement treatment) in an amount of 50% by mass or more, and more preferably 80% by mass or more. . In the ultrafine fiber layer after the split fiber treatment, the split-type conjugate 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. When 50% by mass or more of the split-type composite fiber is contained in the ultrafine fiber layer before the split fiber treatment, the ultrafine fiber layer of the finally obtained covering sheet generally contains 10% by mass or more of the ultrafine fiber. In addition, even in the case where it is difficult to determine the ratio of the ultrafine fibers in the layer in the split type composite fiber, it is difficult to obtain the ratio of the ultrafine fibers in the layer. The inventors have confirmed that this is exhibited in the coated sheet.

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 fiber are polyethylene terephthalate / polyethylene, polyethylene terephthalate / polypropylene, polyethylene terephthalate / ethylene-propylene copolymer, polypropylene / polyethylene, polyethylene terephthalate / nylon, and the like.

When using split type composite fibers, the fiber length is selected within the range of 2 to 100 mm, for example, depending on the form of the web employed in the production method described later. When the hydrophilic fiber contained in the hydrophilic fiber layer is a short fiber (that is, a hydrophilic short fiber), the fiber length of the split composite fiber is preferably longer than the fiber length of the hydrophilic short fiber. When the fiber length of the split type composite fiber is longer than the fiber length of the hydrophilic short fiber, the texture is good and a flexible covering sheet can be obtained. In that case, more strictly speaking, the split type composite fiber needs to have a longer average fiber length than the average fiber length of the hydrophilic short fibers. More specifically, the average fiber length of the split composite fibers is longer than 20 mm, preferably shorter than 100 mm, longer than 30 mm, and more preferably shorter than 80 mm. The average fiber length is measured according to JIS L1015 8.4.1 A method (staple diagram method) (2006).

The ultrafine fiber layer may contain 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. Specific examples of these fibers are as described above in relation to the hydrophilic fiber layer. When the fibers other than the ultrafine fibers are synthetic fibers, the synthetic fibers are preferably formed of a material that does not include a thermoplastic elastomer or a material that includes an amount of less than 30% by mass even if included. Synthetic fibers that do not contain or contain a small amount of thermoplastic elastomer prevent the surface of the covering sheet from having tackiness. Moreover, when the fiber containing a large amount of the thermoplastic elastomer is contained in the ultrafine fiber layer, the ultrafine fiber layer has excessive stretchability, and the stress at the time of return 25% elongation of the coated sheet may become too high. .

The basis weight of the ultrafine fiber layer is preferably 10 g / m ² or more and 160 g / m ² or less. A more preferable basis weight of the ultrafine fiber layer is 15 g / m ² or more and 120 g / m ² or less. When the basis weight of the ultrafine fiber layer is less than 10 g / m ² , the thickness of the ultrafine fiber layer becomes small, so that the fibers constituting the hydrophilic fiber layer are exposed on the surface and give irritation when contacting the skin. Sometimes. When the basis weight of the ultrafine fiber layer exceeds 160 g / m ² , the entanglement between the fibers may be insufficient. Moreover, when the basis weight of the ultrafine fiber layer exceeds 160 g / m ² , the basis weight of the covering sheet may be increased, and a feeling of pressure may be imparted when it is brought into close contact with the skin.

The form before the ultrafine fiber layer is integrated with the other fiber layers and the nonwoven fabric is not particularly limited, and card webs such as parallel web, cross web, semi-random web and random web, airlaid web, and wet papermaking web Any form selected from the above may be used. In consideration of processability and texture, the ultrafine fiber layer is preferably a card web.

[Coating sheet]
Next, the covering sheet of the present invention formed by laminating each layer will be described together with its manufacturing method. In the covering sheet of the present invention, an ultrafine fiber layer is laminated on at least one surface of the laminate, and fibers containing a thermoplastic elastomer, hydrophilic fibers, and ultrafine fibers are entangled and integrated. It is a laminated nonwoven fabric. The covering sheet of the present invention has a weight per unit area within the above preferred range, and as a whole has a basis weight within a range from 20 g / m ^{2 to} 260 g / m ² , more preferably It has a basis weight in the range of 50 g / m ² or more and 180 g / m ² or less, and more preferably has a basis weight in the range of 60 g / m ² or more and 140 g / m ² or less. When the basis weight of the covering sheet is small, the basis weight of any one or more layers may be small, and the desired effect (appropriate stretchability, liquid retention, good tactile sensation) 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 cover sheet of the present invention in which the layers are entangled and integrated, it is preferable that the laminate is present at least partially as a laminate. That is, when the cross section of the covering sheet is observed, at least a part of each layer can be clearly identified, and it is preferable that the hydrophilic fiber layer and the elastomer nonwoven fabric exist as one layer. By this, the coating sheet of this invention shows the tendency for the elasticity which an elastomer nonwoven fabric has to reveal more.

In the coated sheet of the present invention, since at least one surface of the laminate is covered with the ultrafine fiber layer, the appearance and the touch and texture of the surface are governed by the ultrafine fiber layer. Or, when the hydrophilic fiber layer contains hydrophilic short fibers, the fluff of the short fibers is not observed. In addition, as described above, the ultrafine fiber layer gives a dense and smooth surface, and when impregnated with the cosmetic, forms a thin film of the cosmetic on the surface and itself has less irritation to the skin. Has a good tactile sensation. Therefore, the coated sheet of the present invention can be used as a sheet in which stretchability is added to the good tactile sensation provided by the ultrafine fiber layer.

According to JIS L 1096 8.12.2 A method (wet state, strip method) (2006), the coated sheet of the present invention was prepared using a constant-speed tension type tensile tester, and a sample piece having a width of 5 cm, Immediately after being stretched at a gripping interval of 20 cm and a tensile speed of 10 ± 3 cm / min and stretched by 30%, when subjected to a tensile test that gradually narrows the gripping interval at the same speed, after stretching at least 30% in one direction It is preferable that the stress measured at the time of 25% elongation (that is, the stress at the time of 25% elongation) is 0.20 N / 5 cm or more and 3.0 N / 5 cm or less.

The coated sheet of the present invention is held in contact with the skin for a certain period of time while being in close contact with the skin while stretching the coated sheet impregnated with the cosmetic. The return 25% elongation stress in the wet state is used as an indicator of the degree to which the skin feels stretched during this holding. If the return 25% elongation stress of the coated sheet in the wet state is less than 0.20 N / 5 cm in any direction, the user cannot fully feel that his / her skin is stretched. . When the return 25% elongation stress of the coated sheet in the wet state exceeds 3.0 N / 5 cm in any direction, the user feels that the skin is tightened. The stress at 25% return elongation in at least one direction of the covering sheet is more preferably 0.30 N / 5 cm or more and 2.6 N / 5 cm or less, and most preferably 0.40 N / 5 cm or more and 2.2 N / 5 cm or less. It is.

When measuring the stress at 25% return elongation in any one direction of the covering sheet, a test piece is prepared so that the direction becomes the pulling direction. The direction of the covering sheet exhibiting a return 25% elongation stress within the above range is either the machine direction (longitudinal direction), the lateral direction (direction perpendicular to the machine direction when continuously manufactured), or an oblique direction. May be. For example, if the skin covering sheet for impregnating cosmetics is a face mask, and the lateral direction of the covering sheet is coincident with the lateral direction of the face (direction perpendicular to the nose), the lateral return 25% elongation stress is It is preferable that it exists in the said range.

The coated sheet of the present invention has a wet state after 30% elongation as measured when subjected to the tensile test in addition to, or instead of, the wet 25% return elongation stress within the range. It is preferable that the stress at the time of return 20% elongation has a stretchability of 0.10 N / 5 cm or more and 1.4 N / 5 cm or less in at least one direction, and a stretch of 0.10 N / 5 cm or more and 0.70 N / 5 cm or less. It is preferable to have properties. The reason why it is preferable that the wet 20% elongation stress is within this range is as described above for the 25% elongation stress.

In the coated sheet of the present invention, the stress at 20% elongation (that is, the stress at 20% elongation) before 30% elongation in a wet state is 1.2 N / 5 cm or more and 6.0 N / 5 cm or less in at least one direction. It preferably has a certain stretchability, and preferably has a stretchability of 1.2 N / 5 cm or more and 3.0 N / 5 cm or less. When the 20% elongation stress is within this range, the user can apply the covering sheet to the skin while stretching the sheet without feeling resistance when applying the covering sheet to the skin.

The coated sheet of the present invention preferably has the above index within a predetermined range even when dried (that is, in a standard state) so that the coated sheet has sufficient stretchability in a wet state. Specifically, the return 25% elongation stress in the standard state is preferably 0.50 N / 5 cm or more and 3.0 N / 5 cm or less in at least one direction, and 0.50 N / 5 cm or more and 2.0 N / 5 cm. More preferably, it is 0.50 N / 5 cm or more and 1.50 N / 5 cm or less. The stress at the time of 20% elongation in the normal state is preferably 0.10 N / 5 cm or more and 1.0 N / 5 cm or less. The stress at 20% elongation in the standard state is preferably 0.90 N / 5 cm or more and 5.0 N / 5 cm or less. These indicators in the standard state are measured by carrying out a tensile test according to JIS L 1096 8.12.1 A method (standard time, strip method) (2006).

In any one direction, the coated sheet of the present invention preferably has a strain at 100% elongation of 60% or less, more preferably 50% or less, and even more preferably 45% or less. The distortion at the time of 100% elongation is a factor indicating the recovery force after elongation of the sheet, and the smaller this value, the more the sheet is restored to its original state. When the strain is 60% or less, when the sheet is applied to the skin while being stretched, the stress that the sheet tends to return to the original size is large, so that the feeling of sticking to the skin (ie, adhesion) is high. ,preferable. Here, the strain at 100% elongation is measured by the following method.
[Distortion at 100% elongation]
Using a constant-speed tension type tensile tester according to JIS L 1096 8.12.1 A method (strip method) (2006), a sample is 5 cm in width, 10 cm in gripping distance, and 10 ± in tensile speed. Gripping interval at the time when the elongation stress (return elongation stress) becomes zero after 100% elongation after 100% elongation at the same speed and gradually narrowing the grasping interval at 3 cm / min. The length L (cm) (three significant digits) is measured, and the strain at 100% elongation is obtained from the formula of strain (%) = {(L-10.0) /10.0} × 100.

The coated sheet of the present invention also has an initial return stress ratio (25% return elongation stress (%) / 30% elongation stress (%)) of 0.15 or more when dried (standard state) and / or wet. Provided as being. The return stress ratio is more preferably 0.20 or more. The initial return stress ratio is a numerical value obtained by dividing the sheet stress when the 30% stretched sheet is returned to 25% stretch by the stress when the sheet is stretched by 30%. This is a parameter indicating strength. When the initial return stress ratio is 0.15 or more, when the sheet is stretched and attached to the skin, the sheet tends to return with a strong stress. Therefore, it is preferable that the initial return stress ratio is 0.15 or more because an action such that the skin is picked up while being in close contact with the sheet, that is, a lift-up action during use occurs.

In the coated sheet of the present invention, the ratio of the wet stress to the dry (standard state) stress (dry / wet ratio) at 25% return elongation stress is preferably 0.7 or more, and preferably 0.75 or more. Is more preferable. The dry / wet ratio in the stress at 25% return elongation is a value obtained by dividing the stress at 25% return elongation at the time of wetting by the stress at 25% return elongation at the time of drying. This is a parameter indicating the length. When the dry / wet ratio is 0.7 or more, the strength of the beginning of return after drying is maintained even when the nonwoven fabric is used in a wet state. Therefore, when the sheet is stretched and applied to the skin, the sheet has a strong stress. Trying to return. Therefore, it is preferable that the dry / wet ratio is 0.7 or more because an action such that the skin is picked up while being in close contact with the sheet, that is, a lift-up action during use occurs.

The coated sheet of the present invention has a stretchability of the sheet (stress at the time of return elongation, distortion at 100% elongation), for example, when it is applied to the face from the jaw area to the cheek area. When the sheet is stretched and pasted in the direction, it can help to easily physically lift the cheek area. And since the coating sheet of this invention can have the elasticity of two directions, when sticking on a face and using it, for example, a cheek can be lifted and the position can be hold | maintained easily. Further, due to the strong stress at the time of return elongation, it is possible to provide a slimming effect on the face and other body parts as compared with a sheet having extensibility in one direction.

The coated sheet of the present invention can be configured such that when wet, the stretchability is about 70% to about 80% of the stretchability in the standard state. That is, the coated sheet of the present invention can be configured so that the stretchability in the standard state is maintained even in a wet state, and the desired stretchability is exhibited when the cosmetic sheet is impregnated and used. This is also an advantage of the coated sheet of the present invention. This is considered to be because the covering sheet contains an elastomer nonwoven fabric as its constituent layer.

The coated sheet of the present invention is preferably produced using hydroentanglement treatment. Below, the method of manufacturing the coating sheet of this invention using a hydroentanglement process is demonstrated.

First, a laminate is manufactured. The laminate consists of short fibers with a fiber length of 0.5 mm or more and 20 mm or less, and a nonwoven fabric is formed by collecting fibers containing a thermoplastic elastomer on one surface of a hydrophilic fiber layer containing 50% by mass or more of hydrophilic fibers. At the same time, it is preferable that the hydrophilic fiber layer and the nonwoven fabric containing the fiber containing the thermoplastic elastomer are bonded to each other with the fiber containing the accumulated molten or softened thermoplastic elastomer. In the case of producing a laminate by this method, the nonwoven fabric formed by accumulating fibers containing thermoplastic elastomer is 100% elongated in any one direction when accumulated in a state without a hydrophilic fiber layer. It is preferable to have a stretchability such that the strain is less than 50%, and it is more preferable to have a stretchability so that the strain at 100% elongation is less than 40%.

The fiber accumulation is preferably carried out by the meltblown method or the spunbond method. When the thermoplastic elastomer fibers are accumulated on the hydrophilic fiber layer by the melt blown method or the spun bond method, since the fibers immediately after the accumulation are melted or softened, the collected thermoplastic elastomer fibers are cooled and then cooled. Are bonded to the fibers of the hydrophilic fiber layer. The fiber accumulation can be carried out by a melt blown method or a spun bond method that is usually employed. That is, a laminated body can be manufactured by disposing a hydrophilic fiber layer on a collection belt for collecting fibers and carrying out a melt blown method or a spun bond method. If necessary, after accumulating, pressure may be applied to increase the degree of bonding between the two.

More specifically, in the melt blown method, a resin is melt-extruded, a fiber spun from a spinneret for melt blown is blown and spun as an ultrafine fiber stream by a high-temperature and high-speed gas, and the hydrophilicity placed on a collection belt It can carry out by collecting on a fiber layer. 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. Collected on the hydrophilic fiber layer placed on the web collection device, and then, if necessary, the web is carried out by bonding the fibers together using a heating device such as a hot air spraying device or a heating roll. it can.

In any method of producing a laminate, the hydrophilic fiber layer and the elastomer nonwoven fabric are integrated in at least one direction, preferably with a peel strength of 3 mN / 5 cm to 300 mN / 5 cm, more preferably 3 mN / They are integrated with a peel strength of 5 cm to 100 mN / 5 cm, and most preferably, they are integrated with a peel strength of 3 mN / 5 cm to 50 mN / 5 cm. If the peel strength is too small, the laminate is easily peeled off and the handleability is deteriorated. If the peel strength is too large, the stretchability of the elastomer nonwoven fabric may not be sufficiently exhibited in the finally obtained coated sheet.

When the hydrophilic fiber layer is positioned on both surfaces of the elastomer nonwoven fabric, after the elastomer nonwoven fabric is formed on the hydrophilic fiber layer by the above method, the fibers containing the thermoplastic elastomer are melted or softened. Then, a hydrophilic fiber layer is laminated, and pressure is applied as necessary to adhere.

Alternatively, the elastomer nonwoven fabric and the hydrophilic fiber layer may be prepared separately and bonded by heat treatment such as a hot roll or hot air blowing method. In that case, it is necessary to appropriately set the heat treatment conditions so that the bonding between the elastomer nonwoven fabric and the hydrophilic fiber layer does not become too strong.

Next, a laminate having a multilayer structure (hereinafter referred to as this laminate) such that a web containing 50% by mass or more of split-type composite fibers is located on at least one surface of both laminates as a layer for forming an ultrafine fiber layer. Are also referred to as “multilayer laminates”). When the hydrophilic fiber layer is disposed only on one surface of the elastomer nonwoven fabric, the multilayer laminate is produced, for example, as a three-layer or four-layer laminate. The multilayer laminate is a laminate of 4 or 5 layers when hydrophilic fiber layers are arranged on both surfaces of the elastomer nonwoven fabric, or when elastomer nonwoven fabrics are arranged on both surfaces of the short fiber layer. Made as a body. For example, in the case of a three-layer laminate, it is possible to place a web containing split-type composite fibers on the hydrophilic fiber layer side, and position the hydrophilic fiber layer in the middle of the laminate. To preferred.

In the multilayer laminate, the split composite fiber web may be in any form selected from a card web, an air lay web, a wet papermaking web, and the like as described above. The split type composite fibers are preferably contained in the split type composite fiber web of the multilayer laminate in an amount of 50% by mass or more, and more preferably 80% by mass or more.

この This multilayer laminate is subjected to hydroentanglement treatment. At this time, the split-type composite fiber is split to form ultrafine fibers. The hydroentanglement treatment may be carried out by a known method, and the conditions depend on the basis weight of the covering sheet to be finally obtained and the desired split fiber degree when using split-type composite fibers. You may set suitably. 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. A water flow with a water pressure of 1 MPa or more and 10 MPa or less may be ejected from the nozzle 1 to 4 times from the front and back sides. In particular, when the hydroentanglement process is performed at a low water pressure of less than 7 MPa, when the hydrophilic fiber layer includes short fibers, exposure of the short fibers to the surface can be suppressed. After the hydroentanglement treatment, the multilayer laminate is dried to remove moisture, and as a result, the skin-coated sheet for impregnating cosmetics of the present invention can be obtained.

The hydroentanglement treatment breaks the adhesion between the hydrophilic fiber layer and the elastomer nonwoven fabric, and in the resulting coated sheet, the hydrophilic fiber layer and the elastomer nonwoven fabric may be integrated only by the interlace of fibers. Even in that case, the effect (water retention) by the hydrophilic fiber layer and the effect by the elastomer nonwoven fabric (ensurement of stretchability of the entire composite sheet) can be sufficiently obtained.

When the laminate has a two-layer structure composed of an elastomer / hydrophilic fiber layer, and the split-type composite fiber web is positioned on both sides of the laminate, it is preferable that the water stream is split adjacent to the elastomeric nonwoven fabric of the laminate. Spray from the web side and then spray from the side of the split composite fiber web adjacent to the hydrophilic fiber layer of the laminate. By jetting the water flow in this order, particularly when the hydrophilic fiber layer contains hydrophilic short fibers, the hydrophilic fiber layer is hardly broken in the covering sheet, and can be more reliably left as one layer.

In the cover sheet manufactured by performing the water flow entanglement process, the sprayed portion of the water flow may form a stripe-shaped recess. The concave portion is easily formed particularly when the hydrophilic fiber layer includes hydrophilic short fibers. In the concave portion, since the hydrophilic fibers constituting the hydrophilic fiber layer are scattered around, the amount of the hydrophilic fibers is reduced and the thickness is reduced. In this part, the multi-layer structure is collapsed, and there is a case where a three-layer structure of ultrafine fiber layer / elastomer nonwoven fabric / extrafine fiber layer is partially formed, but the multi-layer structure tends to remain in other parts. Therefore, when the coated sheet of the present invention is produced using the hydroentanglement treatment, it is easy to obtain a coated sheet that achieves the desired effect of the present invention (appropriate elasticity manifestation by the elastomer nonwoven fabric). It becomes.

When the hydrophilic fiber layer is a wet non-woven fabric containing pulp fibers, the pulp fibers may be rearranged due to the scattering of the pulp fibers at the location of the water flow due to the hydroentanglement treatment. The rearrangement of the pulp fibers makes it possible to reduce (control) the initial stress (stress until the pulp layer breaks) of the coated sheet. In addition, the rearrangement of the pulp fibers makes it easy for the pulp layer to hold the liquid and improves the water retention.

Alternatively, the coated sheet of the present invention may be produced by a method in which a laminate and a fiber web containing ultrafine fibers (for example, a melt blown web) are integrated by needle punching. Alternatively, the coated sheet of the present invention may be manufactured by combining needle punch and hydroentanglement treatment. Alternatively, the coated sheet of the present invention is a multi-layer laminate in which a split composite fiber web (or a fiber web containing ultrafine fibers), a hydrophilic fiber layer, and an elastomer nonwoven fabric are separately prepared, and these are simply overlapped, You may manufacture by the method of integrating by a hydroentanglement process and / or a needle punch.

Subsequently, the face mask of the present invention will be described. In the face mask of the present invention, the liquid cosmetic is 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 contains a water-soluble thickener and an aqueous carrier, and the type and amount of the water-soluble thickener are adjusted so that the viscosity is preferably 500 to 60000 mPa · s.

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 the 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. 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.

The coated sheet of the present invention may be used for purposes other than face masks. 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 by way of examples. In the following examples, physical properties were evaluated by the following methods.

(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 elongation when the sample broke was measured.

(Surface elongation stress and return elongation stress)
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 gripping interval was gradually narrowed at the same speed immediately after stretching for 30 minutes and stretching 30%. The stress generated in the sample when it reaches the predetermined elongation rate before 30% elongation is defined as the stress at the time of elongation at the elongation rate, and the stress generated in the sample when the predetermined elongation rate is reached after 30% elongation, It was measured as the return elongation stress at the elongation rate. When measuring the stress of the wet sample, the sample was wetted with water according to JIS L 1096 8.12.2 (2006).

(Stripping strength)
Measured according to JIS L 1085 6.13 (a) (peeling strength) (1998). Sample pieces are taken at a width of 5 cm and 15 cm, the elastomer nonwoven fabric and the hydrophilic fiber layer are peeled from the side to the side of about 5 cm in the direction of the long side, and using a constant speed tension type tensile tester, the grip interval is 5 cm and the tensile speed is It extended | stretched on the conditions of 10 cm / min.

(distortion)
In accordance with 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 gripping distance, and 10 cm / min tensile speed. The gripping interval was gradually narrowed at the same speed immediately after stretching under the condition and 100% stretching. The length L (cm) (three significant digits) of the gripping interval when the elongation stress at the time of elongation (elongation stress on the return path) becomes 0 is measured, and strain (%) = {(L-10.0) /10.0}×100 strain was determined. When measuring the strain of the wet sample, the sample was wetted with water according to JIS L 1096 8.12.2 (2006).

(Air permeability)
It was measured according to JIS L-1096-8.27.1 Method A (2006).

[Production of Laminate A]
As a hydrophilic fiber layer, a tissue (manufactured by Havicks Co., Ltd.) having a basis weight of 17 g / m ² made of pulp fiber was prepared. While this tissue is placed on a transport belt of a meltblown apparatus and continuously supplied, 60% by mass of a thermoplastic elastomer (hydrogenated styrene-isoprene-styrene elastomer) and polypropylene resin 40 are applied to the surface of the tissue. A mixed resin mixed with mass% is accumulated on a tissue so as to have a basis weight of 10 g / m ² by a melt blown method, and an elastomer nonwoven fabric (trade name: manufactured by Kuraray Co., Ltd.) and a hydrophilic fiber layer A laminate comprising:

[Production of Laminate B]
As a hydrophilic fiber layer, a tissue (manufactured by Havicks Co., Ltd.) having a basis weight of 17 g / m ² made of pulp fiber was prepared. While this tissue is placed on a transport belt of a meltblown apparatus and continuously supplied, 60% by mass of a thermoplastic elastomer (hydrogenated styrene-isoprene-styrene elastomer) and polypropylene resin 40 are applied to the surface of the tissue. A mixed resin mixed with mass% is accumulated on a tissue so as to have a basis weight of 18 g / m ² by a melt blown method, and an elastomer nonwoven fabric (trade name: manufactured by Kuraray Co., Ltd.) and a hydrophilic fiber layer A laminate comprising: The conditions for fiber accumulation by the melt blown method were the same as the conditions adopted in the production of the laminate A except that the line speed was reduced.

[Production of Laminate C]
As a hydrophilic fiber layer, a tissue (manufactured by Havicks Co., Ltd.) having a basis weight of 17 g / m ² made of pulp fiber was prepared. While this tissue is placed on a transport belt of a meltblown apparatus and continuously supplied, 60% by mass of a thermoplastic elastomer (hydrogenated styrene-isoprene-styrene elastomer) and polypropylene resin 40 are applied to the surface of the tissue. A mixed resin mixed with mass% is accumulated on a tissue so as to have a basis weight of 15 g / m ² by a melt blown method, and an elastomer nonwoven fabric (trade name: manufactured by Kuraray Co., Ltd.) and a hydrophilic fiber layer A laminate comprising: The conditions for fiber accumulation by the melt blown method were the same as the conditions adopted in the production of the laminate A except that the line speed was reduced.

As a hydrophilic fiber layer, a tissue (manufactured by Havicks Co., Ltd.) having a basis weight of 17 g / m ² made of pulp fiber was prepared. While this tissue is placed on a transport belt of a meltblown apparatus and continuously supplied, 60% by mass of a thermoplastic elastomer (hydrogenated styrene-isoprene-styrene elastomer) and polypropylene resin 40 are applied to the surface of the tissue. A mixed resin mixed with mass% is accumulated on a tissue so as to have a basis weight of 13 g / m ² by a melt blown method, and an elastomer nonwoven fabric (trade name: manufactured by Kuraray Co., Ltd.) and a hydrophilic fiber layer A laminate comprising: The conditions for fiber accumulation by the melt blown method were the same as the conditions adopted in the production of the laminate A except that the line speed was reduced.

For laminates A to D, the hydrophilic fiber layer was peeled from the laminate, and the transverse elongation at break of the elastomer nonwoven fabric, the outgoing 20% elongation stress, the return 25% elongation stress, and the returned 20% elongation stress The strain, and the air permeability of the nonwoven fabric were measured. The measurement results are shown in Table 1.

When the peel strength of the laminate A was measured, it was 0.0199 N / 5 cm (19.9 mN / 5 cm) in the longitudinal direction (machine direction), and 0.0175 N in the lateral direction (direction perpendicular to the machine direction). / 5 cm (17.5 mN / 5 cm).

[Production of elastomer nonwoven fabric a]
The mixed resin used in the production of the laminate was accumulated on the conveying belt by the melt blown method under the conditions employed when producing the laminate C, and an elastomer nonwoven fabric having a basis weight of 15 g / m ² was obtained.

[Sample 1]
As a split-type composite fiber web, a polyethylene terephthalate / polyethylene 8-split composite fiber having a fineness of 2.2 dtex and a fiber length of 51 mm (trade name DFS (SH) manufactured by Daiwabo Polytech Co., Ltd.) of about 36.5 g per unit weight ^Two semi-random card webs of / m ² were prepared and used as a first split type composite fiber web and a second split type composite fiber web, respectively.

The first split-type composite fiber web is disposed on the both sides of the laminate A at a position adjacent to the surface of the elastomer nonwoven fabric, and the second split-type composite fiber web is disposed at a position adjacent to the surface of the hydrophilic fiber layer. A layered structure was formed and subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water flow with a water pressure of 6 MPa is jetted twice toward the surface of the first divided composite fiber web of the laminate using a nozzle having an orifice with a hole diameter of 0.1 mm provided at an interval of 0.6 mm. Then, a columnar water flow having a water pressure of 6 MPa was jetted twice toward the surface of the second split-type composite fiber web. Next, the laminate after the hydroentanglement treatment was dried at 110 ° C. using an air-through heat treatment machine to obtain a coated sheet. 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 can be observed, the ultrafine fiber layer is 0.5 dtex when observed with an electron microscope at 300 times magnification. It contained 15% by mass of the following ultrafine fibers.

[Sample 2]
A method similar to the manufacturing method of Sample 1 except that the basis weight of the first and second split-type composite fiber webs is about 32.5 g / m ² and these webs are arranged on both sides of the laminate B. A coated sheet was produced. When the cross section of the sheet was observed in the same manner as Sample 1, the ultrafine fiber layer contained 20% by mass of ultrafine fibers of 0.5 dtex or less.

[Sample 3]
A method similar to the manufacturing method of Sample 1 except that the basis weight of the first and second split-type composite fiber webs is about 34.0 g / m ² and these webs are arranged on both sides of the laminate C. A coated sheet was produced. When the cross section of the sheet was observed in the same manner as Sample 1, the ultrafine fiber layer contained 20% by mass of ultrafine fibers of 0.5 dtex or less.

[Sample 4]
A method similar to the manufacturing method of Sample 1 except that the basis weight of the first and second split-type composite fiber webs is about 29.0 g / m ² and these webs are arranged on both sides of the laminate C. A coated sheet was produced. When the cross section of the sheet was observed in the same manner as Sample 1, the ultrafine fiber layer contained 30% by mass of ultrafine fibers of 0.5 dtex or less.

[Sample 5]
The basis weight of the first and second split-type composite fiber webs is about 41.5 g / m ^2, and these webs are arranged on both sides of a tissue (made by Havix Corporation) having a basis weight of 17 g / m ² made of pulp fibers. Except for the above, a coated sheet was produced by the same method as the production method of Sample 1. When the cross section of the sheet was observed in the same manner as Sample 1, the ultrafine fiber layer contained 15% by mass of ultrafine fibers of 0.5 dtex or less.

[Sample 6]
It replaced with the laminated body and the hydroentanglement process and drying were performed on the same conditions as the conditions used by manufacture of the sample 1 except having used the elastomer nonwoven fabric a, and the coating sheet was obtained. When the cross section of the sheet was observed in the same manner as Sample 1, the ultrafine fiber layer contained 15% by mass of ultrafine fibers of 0.5 dtex or less.

[Sample 7]
As a split type composite fiber web, a basis weight of about 35 g / m comprising 100% by mass of a polyethylene terephthalate / polyethylene eight split type composite fiber having a fineness of 2.2 dtex and a fiber length of 38 mm (trade name DFS (SH) manufactured by Daiwabo Polytech Co., Ltd.). ^Two semi-random card webs of 2 were prepared, which were respectively a first split composite fiber web and a second split composite fiber web. Except having arrange | positioned these webs on both surfaces of the laminated body D, the hydroentanglement process and drying were performed on the same conditions as the conditions used by manufacture of the sample 1, and the coating sheet was obtained. When the cross section of the sheet was observed in the same manner as Sample 1, the ultrafine fiber layer contained 30% by mass of ultrafine fibers of 0.5 dtex or less.

[Sample 8]
As a split type composite fiber web, a polyethylene terephthalate / polyethylene eight split type composite fiber having a fineness of 2.2 dtex and a fiber length of 51 mm (trade name DFS (SH), manufactured by Daiwabo Polytech Co., Ltd.) is approximately 35 g / m in weight. ^One semi-random card web was prepared. A coated sheet was produced by the same method as the production method of Sample 1 except that this web was disposed on one side of the laminate D. When the cross section of the sheet was observed in the same manner as Sample 1, the ultrafine fiber layer contained 20% by mass of ultrafine fibers of 0.5 dtex or less.

For each sample, 5%, 10%, 15%, 20%, 25% elongation stress, 30% elongation stress, return 25%, 20%, 15% in the transverse direction of the sample in dry and wet conditions 10% elongation stress and strain were measured. The measurement results are shown in Table 2.

Samples 1 to 4 and 6 to 8 had good stretchability in a wet state, with a return 25% elongation stress in the range of 0.30 N / 5 cm to 1.50 N / 5 cm. . Since the sample 5 did not have an elastomer nonwoven fabric, the stress at the time of return 25% elongation was low. Sample 5 returned in the wet state and the stress at 25% elongation was further reduced, and showed extremely low stretchability in the wet state. Samples 1 to 4 showed a high sticking property to the skin with a strain at 100% elongation of 50% or less.

Samples 1 to 4 and 6 to 8 have an initial return stress ratio (25% return elongation stress (%) / 30% elongation stress (%)) of 0.15 or more when dried (standard state) and when wet. And had the strength of beginning to return after stretching, indicating lift-up properties during use. On the other hand, Sample 5 had a small initial return stress and did not exhibit sufficient lift-up properties.
In Samples 1 to 4 and 6 to 8, the ratio of the wet stress to the dry (standard state) stress (dry / wet ratio) at 25% return elongation stress is 0.7 or more, and the sheet is in a wet state. Since the strength at the beginning of the return was maintained, the lift-up property during use was shown. On the other hand, Sample 5 did not show sufficient lift-up property because it returned in a wet state and the stress during elongation decreased.

Samples 1 to 8 were punched into the shape of the face so that the lateral direction thereof coincided with the lateral direction of the face, and cuts were made at locations corresponding to the eyes, mouth, and nose to form the face mask shape. Folded once with a vertical line passing through the center of the face (a line parallel to the direction of the nose), folded once with a vertical line passing through the center, and then folded once with a horizontal line passing through the center and folded in eight I made it. The sheet folded in eight is put into an A6 size polyethylene bag with a chuck, and a liquid cosmetic having the composition shown in Table 3 is added to the polyethylene bag as a liquid cosmetic in 700 parts by mass with respect to 100 parts by mass of the base material. The mass part was injected 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 five times with the palm of the hand, and then the polyethylene bag was opened to take out the sheet.

The face mask produced using Samples 1 to 8 was sufficiently impregnated with liquid cosmetic.

Next, a face mask impregnated with liquid cosmetics was applied to the face of the monitor while being stretched, and adhered to the face for 20 minutes. The face masks prepared using Samples 1 to 4 and 6 to 8 gave the monitor a sense of moderate skin stretching. The face mask produced using Sample 5 had a lower degree of sensation of skin stretching than Samples 1-4. The face mask produced using Sample 6 was a liquid cosmetic material that leaked out of the face mask when it was slightly stretched and applied to the face.

The skin-coated sheet for impregnating cosmetics of the present invention has stretchability in a state impregnated with cosmetics and gives a good tactile sensation, so every part of the human body, particularly the entire face, nose, eyes, mouth, It is suitable for sticking to sensitive parts such as the neck, and can be used specifically as a face mask.

DESCRIPTION OF SYMBOLS 1 Skin coating sheet for cosmetic impregnation 2 Elastic nonwoven fabric 3 Hydrophilic fiber layer 4 Laminate 5 Ultrafine fiber layer

Claims

A laminate in which a hydrophilic fiber layer containing 50% by mass or more of hydrophilic fibers is laminated on at least one surface of a stretchable nonwoven fabric containing fibers containing a thermoplastic elastomer, and laminated on at least one surface of the laminate. And an ultrafine fiber layer containing 10% by mass or more of ultrafine fibers having a fineness of 0.5 dtex or less,
A sheet in which the ultrafine fiber layer and the laminate are integrated by interlacing the fiber containing the thermoplastic elastomer, the hydrophilic fiber, and the ultrafine fiber,
In accordance with JIS L 1096 8.12.2 A method (wet, strip method) (2006), using a constant speed tension type tensile tester, a wet sample piece is 5 cm wide and 20 cm in gripping interval. Immediately after being stretched at a tensile speed of 10 ± 3 cm / min and stretched 30%, at the same speed, when subjected to a tensile test that gradually narrows the grip interval, 25% stretch after 30% stretch in at least one direction The stress sometimes measured is 0.20 N / 5 cm or more and 3.0 N / 5 cm or less,
Skin coating sheet for cosmetic impregnation.
The skin covering sheet for impregnating cosmetics according to claim 1, wherein the stretchable nonwoven fabric is a meltblown nonwoven fabric.
The stretchable nonwoven fabric has a basis weight of 5 g / m 2 to 50 g / m 2 , the hydrophilic fiber layer has a basis weight of 5 g / m 2 to 50 g / m 2 , and the ultrafine fiber layer is 10 g / m 2. The skin-coated sheet for impregnating cosmetics according to claim 1 or 2, having a basis weight of 160 g / m 2 or less.
The skin-covering sheet for impregnating cosmetics according to any one of claims 1 to 3, wherein the thermoplastic elastomer is a styrene-based elastomer.
The cosmetic skin-impregnated sheet according to any one of claims 1 to 4, wherein the hydrophilic fibers are pulp fibers and the hydrophilic fiber layer is a wet nonwoven fabric.
6. The skin-coated sheet for impregnating cosmetics according to claim 1, wherein the ultrafine fibers are formed by splitting split-type composite fibers.
The skin-coated sheet for impregnating cosmetics according to any one of claims 1 to 6, wherein the fiber containing the thermoplastic elastomer, the hydrophilic fiber, and the ultrafine fiber are entangled with each other by hydroentanglement treatment.
Skin-covering sheet for impregnation with cosmetics, wherein the initial return stress ratio (25% return elongation stress (%) / 30% elongation stress (%)) at the time of drying (standard state) and / or wetness is 0.15 or more .
A fiber containing thermoplastic elastomer is accumulated on one surface of a hydrophilic fiber layer containing 50% by mass or more of hydrophilic fibers to form a nonwoven fabric, and the accumulated fiber containing thermoplastic elastomer that is melted or softened Adhering a hydrophilic fiber layer and a nonwoven fabric containing fibers containing a thermoplastic elastomer to obtain a laminate,
Including laminating a split composite fiber web containing 50% by mass or more of split composite fibers on at least one surface of the laminate to obtain a multilayer laminate, and subjecting the multilayer laminate to hydroentanglement treatment. The manufacturing method of the skin coating sheet for cosmetics impregnation.
The method for producing a skin-coated sheet for impregnating cosmetics according to claim 9, wherein the fibers containing the thermoplastic elastomer are accumulated by a melt blown method.
The method for producing a skin-coated sheet for impregnating cosmetics according to claim 9 or 10, wherein the hydrophilic fiber layer is a wet nonwoven fabric containing pulp fibers.
The liquid cosmetic is impregnated at a ratio in the range of 100 parts by mass to 2000 parts by mass with respect to 100 parts by mass of the skin-coated sheet for impregnating cosmetics according to any one of claims 1 to 8. , Face mask.
The face mask according to claim 12, wherein the liquid cosmetic contains a water-soluble thickener and an aqueous carrier.