JP5324403B2 - Skin covering sheet for impregnating cosmetics, method for producing the same, and face mask using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin covering sheet to be impregnated with a cosmetic, which sheet has moderate elasticity in a wetted state and to provide a face mask obtained by using the skin covering sheet. <P>SOLUTION: A method for producing the skin covering sheet (1) comprises the steps of: piling a fiber containing thermoplastic elastomer on one surface of a short fiber layer (3) consisting of a short fiber having 0.5-20 mm fiber length, forming a nonwoven fabric (2) and sticking the short fiber layer to the nonwoven fabric by the fiber containing thermoplastic elastomer to form a laminate (4); arranging a fibrous web containing &ge;20 mass% cellulose fiber on at least one surface of the laminate and subjecting the fibrous web-arranged laminate to hydroentangling treatment to form a cellulose fiber layer (5) and integrate the laminate with the cellulose fiber layer. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

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

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

In JP-A-2006-110969 (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.

  Japanese Patent Publication No. 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.

  Depending on the application position of the skin covering sheet, some consumers prefer a sheet whose surface in contact with the skin is made of natural fibers (for example, cotton or silk) or fibers derived from natural materials (for example, viscose rayon). Such fibers have a track record of being widely used in products that come into contact with the skin, such as underwear, so consumers have the image that it is gentle to the skin and difficult to irritate. By feeling that way.

  Japanese Patent Application Laid-Open No. 2007-7062 (Patent Document 4) discloses a short fiber containing a cellulose short fiber between an upper fiber layer containing a fiber (preferably cotton) having a fineness larger than 0.5 dtex and a lower fiber layer. It proposes a skin-covering sheet in which layers are located and integrated by entanglement of fibers. The sheet disclosed in this gazette has been proposed for the purpose of obtaining a sheet having an appropriate stretchability and easy to stick to the skin, and has the stretchability. However, the skin-coated sheet described in this publication does not have or does not have stretchability (that is, the property of returning to its original shape after being stretched), and is extremely small. Moreover, it did not lead to giving the user the sensation that the jaw (face line) was pulled upward.

International Publication No. 2006/016601 Pamphlet JP 2006-110696 A Japanese translation of PCT publication No. 2003-507597 JP 2007-7062 A

  There is a great demand for the above-mentioned skin-coated sheet for impregnating cosmetics satisfying consumer requirements, that is, a skin-coated sheet for impregnating cosmetics made of natural fibers or fibers and having elasticity. it is conceivable that. However, natural fibers or fibers derived from natural materials are not stretchable per se. Therefore, in order to obtain a stretchable sheet using these fibers, the sheet itself is made to have a stretchable structure (for example, a knitted fabric), or these fibers and a stretchable sheet are attached. It is necessary to match.

  Moreover, since the skin covering sheet for impregnating cosmetics covers sensitive parts, it is not sufficient to simply have stretchability. 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.

  None of the above-mentioned documents discloses a skin-covering sheet having a skin contact surface made of natural fibers or fibers derived from natural materials and having elasticity. As a matter of course, these documents do not refer to the specific degree of elasticity of the skin covering sheet impregnated with the cosmetic. 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). .

  In addition, the sheet having elasticity has a problem that it is difficult to continuously produce and process the sheet. For example, when a skin covering sheet is punched into a predetermined shape, if the sheet is stretched with a slight force, the sheet is deformed by the tension applied during processing and then restored to obtain a product with a desired shape. It may not be possible. In particular, in the field of face masks, various shapes have been developed, and the shape of the punching die is complicated, so that it is desired to further improve the workability of the sheet.

  The present invention relates to a skin-coated sheet for impregnating cosmetics, in which cellulosic fibers such as cotton constitute a skin contact surface, have appropriate stretchability in a wet state, and are excellent in productivity and workability, and An object of the present invention is to provide a face mask using a mask.

  As a result of repeated studies, the present inventors have laminated a sheet-like material having elasticity and a sheet-like material containing cellulosic fibers so that the cellulosic fibers are located on the skin contact surface, and makeup. Good productivity and workability are ensured by ensuring stretchability after impregnating the material and using a stretchable sheet in combination with other nonwoven fabrics that are not stretchable or small As a result, the present invention has been devised.

The present invention
A laminate in which a short fiber layer composed of short fibers having a fiber length of 0.5 to 20 mm is laminated on at least one surface of a stretchable nonwoven fabric containing fibers containing a thermoplastic elastomer, and at least one surface of the laminate Including a cellulosic fiber layer containing 20% by mass or more of cellulosic fibers,
The fiber containing the thermoplastic elastomer, the short fiber, and the cellulosic fiber are entangled with each other, so that the cellulosic fiber layer and the laminate are integrated,
The fiber length of the fibers constituting the cellulosic fiber layer is longer than the fiber length of the short fibers constituting the short fiber layer,
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”). And a short fiber layer composed of short fibers having a fiber length of 0.5 to 20 mm, and the fiber length of the constituent fibers is longer than the short fibers on at least one surface of the sheet. And the fiber layer containing a cellulose fiber is arrange | positioned, It is characterized by the above-mentioned. If the sheet | seat of this invention is used so that a cellulose fiber layer may become a skin contact surface, a favorable tactile sensation will be brought to a user by the cellulose fiber whose fiber length is longer than the short fiber which comprises a short fiber layer.

  In this sheet, the short fiber layer increases the dimensional stability of the elastomer nonwoven fabric to a certain extent, and prevents the width of the elastomer nonwoven fabric from extending due to the longitudinal extension during continuous processing. Therefore, the sheet | seat of this invention can be manufactured stably. Moreover, since the short fiber layer at least partially constitutes one layer of the sheet even after being integrated with the cellulosic fiber layer, when the sheet of the present invention is processed, occurrence of width is effectively prevented. Furthermore, since the short fiber layer does not have a high strength like a spunbond web, it does not completely hinder the stretchability of the elastomer nonwoven fabric. Therefore, the sheet | seat of this invention exhibits the moderate elastic property brought about by the elastomer nonwoven fabric.

  The cellulosic fiber is preferably cotton, for example. Cotton is preferably used because it has been widely used as a natural material. In addition, by combining cotton, an elastomer nonwoven fabric, and a short fiber layer, a skin-covering sheet having excellent mechanical properties that cannot be obtained with a single-layer nonwoven fabric containing cotton can be realized.

  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 advantageously used in combination with other fiber layers to achieve moderate stretchability.

  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.

The coated sheet of the present invention is
A nonwoven fabric is formed by accumulating fibers containing a thermoplastic elastomer on one surface of a short fiber layer made of fibers having a fiber length of 0.5 to 20 mm, and an accumulated molten or softened thermoplastic elastomer A short fiber layer and a non-woven fabric including a fiber including a thermoplastic elastomer are bonded to each other by a fiber including the laminate to obtain a laminate;
A multilayer laminate is formed by laminating a cellulose fiber layer comprising fibers having a fiber length longer than that of the fibers constituting the short fiber layer on at least one surface of the laminate, and containing 20% by mass or more of cellulose fibers. It can be produced by a production method including obtaining a body and subjecting the multilayer laminate to hydroentanglement treatment. Here, the term “multilayer laminate” is used to distinguish a laminate in which a cellulosic fiber web is laminated on the laminate from a laminate comprising an elastomer nonwoven fabric and a short fiber layer.

  In this manufacturing method, a laminated body in which a short fiber layer and an elastomer nonwoven fabric are integrated is first produced, and then a cellulosic fiber web is laminated on both surfaces of the laminated body and subjected to hydroentanglement treatment, thereby producing fibers. It is characterized by confounding each other. In this manufacturing method, the laminated body which consists of a short fiber layer and an elastomer nonwoven fabric is supplied as an independent sheet material. In other words, by providing the elastomer nonwoven fabric in the form of a laminate with high dimensional stability, it is possible to prevent the width of the elastomer nonwoven fabric from extending in the longitudinal direction during continuous processing, and appropriate stretchability is achieved. The obtained sheet can be manufactured stably.

  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 a cellulose-based fiber layer / short fiber layer / elastomer nonwoven fabric. 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.

  In the sheet of the present invention, the laminate composed of the elastomer nonwoven fabric and the short fiber layer functions as a layer responsible for stretchability, and the short fiber layer constituting the laminate is generated when the sheet is manufactured and when the sheet is processed. In addition, the width of the laminate itself and the sheet is effectively suppressed. Therefore, the sheet | seat of this invention can be manufactured stably, and can be attached | subjected stably to continuous processing (for example, application | coating or immersion of a processing agent, cutting | disconnection). Furthermore, the cellulosic fiber layer gives the sheet a property of having a strong strength when dried and weakening when wet. Therefore, the sheet | seat of this invention shows favorable workability until use of a short fiber layer and use of a cellulosic fiber are combined and it impregnates cosmetics.

  In the method for producing a coated sheet of the present invention, a laminated body in which a short fiber layer and an elastomer nonwoven fabric are integrated is first prepared, and then a cellulosic fiber web is laminated on the laminated body, and then hydroentangled treatment is performed. Do. 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. In addition, when the laminate is pulled, while the cellulose fiber web is laminated and further subjected to hydroentanglement, the production method is less likely to cause narrowing of the laminate, and the coated sheet of the present invention is stably formed. Makes it possible to manufacture. Furthermore, since the cellulosic fiber has the property of being entangled favorably by the hydroentanglement treatment, the nonwoven fabric having desired mechanical properties can be obtained by reducing the water pressure, and the energy during production can be reduced.

  In the face mask of the present invention, the covering 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 gives the user a real sense that wrinkles and sagging are reduced during use while applying a predetermined active ingredient in the liquid cosmetic to the skin. Furthermore, since cellulosic fibers are used in one layer of the sheet, the face mask of the present invention can be pulled with a small force. This is because the tensile stress in the wet state of the cellulosic fiber is smaller than the tensile stress in the dry state. Therefore, the user can extend and use the face mask without feeling resistance and stress.

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

  As shown in FIG. 1, the covering sheet (1) of the present invention is a laminate in which a short fiber layer (3) is laminated on at least one surface of a stretchable nonwoven fabric (2) containing fibers containing a thermoplastic elastomer. From the cellulosic fiber layer (5) comprising a cell (4) and a cellulosic fiber that is laminated on one or both surfaces of the laminate, the fiber length being longer than the short fiber, and including cellulosic fibers Composed. 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 comprising a thermoplastic elastomer, which is one layer of the laminate, will be described. The fiber containing the thermoplastic elastomer is a fiber made of a resin containing 30% by mass or more of the thermoplastic elastomer, and preferably contains 50% by mass or more of the thermoplastic elastomer. Alternatively, the fiber comprising the thermoplastic elastomer may consist solely of the thermoplastic elastomer.

  Examples of thermoplastic elastomers (also simply referred to as “elastomers”) include styrene elastomers, polyolefin elastomers, ester elastomers, vinyl chloride elastomers, urethane elastomers, and amide elastomers. The elastomer nonwoven fabric is preferably composed of fibers containing a styrene-based elastomer. The styrenic elastomer has good chemical resistance, weather resistance, and moldability, and when the coated sheet of the present invention is produced by the production method described later, it is bonded when integrated with the short fiber layer. By functioning well as an ingredient.

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

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

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

  These resins can also function well from the viewpoint of reducing the tackiness (adhesiveness) of the 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 elastomer.

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

  When the elastomer nonwoven fabric includes fibers that do not contain an elastomer, the proportion 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.

  An elastomer nonwoven fabric is comprised from the fiber containing an elastomer, or the fiber containing an elastomer, and the fiber which does not contain 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 short fiber layer and the elastomer nonwoven fabric can be bonded and integrated simultaneously with the production of the elastomer nonwoven fabric. Also, it can be integrated with the short 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. As will be described later, when the air permeability of the elastomer nonwoven fabric is less than 10 cm ³ / cm ² · sec, when the short fiber layer, the elastomer nonwoven fabric and the cellulosic 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.

  In accordance with JIS L 1096 8.12.1 A method (standard time, strip method) (2006), the elastomer non-woven fabric was measured using a constant-speed tension type tensile tester, and the sample piece was 5 cm wide and 10 cm in the grip 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 time stress (that is, the return 25% elongation stress) is preferably 0.20 N / 5 cm or more and 3.0 N / 5 cm or less, and preferably has elasticity, 0.30 N / 5 cm or more and 2.5 N / 5 cm or less. More preferably, it has elasticity, and still more preferably 0.40 N / 5 cm or more and 1.7 N / 5 cm or less. 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, and more preferably has stretchability of 0.20 N / 5 cm to 1.0 N / 5 cm.

  Alternatively, or in addition, the elastomer nonwoven fabric has a stress at 20% elongation (hereinafter referred to as “going stress at 20% elongation”) of 0.25 N / 5 cm or more and 5.0 N / 5 cm before 30% elongation in at least one direction. It is preferable that it has the following elasticity, more preferably 0.30 N / 5 cm to 4.0 N / 5 cm, and still more preferably 0.50 N / 5 cm to 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 stretchability 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.

  Below, the melt blown nonwoven fabric suitable for the elastomer nonwoven fabric which comprises the coating sheet of this invention is specifically mentioned and demonstrated. 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 50-500 times enlarged with an electron microscope, randomly selecting 20 fibers constituting the nonwoven fabric, 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 stress of the melt blown nonwoven fabric is preferably 0.20 N / 5 cm or more and 3.0 N / 5 cm or less, more preferably 0.30 N / 5 cm or more and 2.5 N / 5 cm or less, and More preferably, it is 40 N / 5 cm or more and 1.7 N / 5 cm or less.

  Alternatively or in addition, the return 20% elongation stress of the meltblown nonwoven fabric is preferably 0.1 N / 5 cm or more and 1.8 N / 5 cm or less, and preferably 0.20 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 1.0 N / 5 cm or less.

  Alternatively or in addition, the 20% elongation stress of the meltblown nonwoven fabric is preferably 0.25 N / 5 cm or more and 5.0 N / 5 cm or less, and preferably 0.3 N / 5 cm or more and 4.0 N / 5 cm or less. More preferably, it is 0.5 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 a fiber made of a resin mixed with 10% by mass or more and 50% by mass or less of a resin (particularly polypropylene resin) or a fiber made of only the styrene-based elastomer, 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 cellulosic fiber layer is a method of accumulating fibers on the short fiber layer, and simultaneously producing the melt blown nonwoven fabric and integrating the melt blown nonwoven fabric with the short fiber layer. It is preferable that it is obtained by carrying out.

  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 cellulosic fiber layer is a method of accumulating fibers on the short fiber layer, producing a spunbond nonwoven fabric, and integrating the spunbond nonwoven fabric with the short fiber layer. Are preferably obtained by carrying out at the same time.

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.

  Next, the short fiber layer will be described. The short fiber layer is a layer composed of short fibers having a fiber length of 0.5 to 20 mm. The fiber length of the short fibers is preferably 0.5 to 15 mm, more preferably 0.8 to 10 mm, and even more preferably 1 to 5 mm. All the short fibers constituting the short fiber layer may have the same length or different lengths. The average fiber length of the short fibers is measured according to JIS L1015 8.4.1 A method (staple diagram method) (2006). When the short fibers are pulp, the number average fiber length is obtained by measuring according to JIS P8226 (pulp-fiber automatic measuring method fiber length measuring method) (2006).

  The short fiber layer may generally be in the form of an air laid web or wet nonwoven before being integrated with the cellulosic fiber layer. The wet nonwoven fabric includes paper made of cellulose-based short fibers described later. In the present invention, the short fiber layer is preferably a wet nonwoven fabric. Although the wet nonwoven fabric depends on the constituent fibers and the degree of entanglement of the fibers, 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, when the wet nonwoven fabric is entangled with each other by the hydroentanglement process, the wet pressure nonwoven fabric can be processed at a lower water pressure, so that the texture of the entire coated sheet can be softened. Furthermore, the wet nonwoven fabric has a small difference in physical properties due to a difference in direction (longitudinal direction, lateral direction) due to its manufacturing method. Therefore, when the coated sheet in which the wet nonwoven fabric is a short fiber layer is subjected to a cutting process, the variation in the degree of “sag” due to the difference in the direction of the blade is eliminated, or Variations can be reduced.

  The fiber constituting the short fiber layer may be any of natural fiber, regenerated fiber, and synthetic fiber. The short fiber layer may be composed of one type of short fiber or may be composed of two or more different fibers.

  The fibers constituting the short fiber layer are preferably made of a material that does not contain a thermoplastic elastomer. If the short fiber contains a thermoplastic elastomer, the effect of suppressing the width of the elastomer nonwoven fabric by the short fiber layer may not be obtained.

  In the present invention, the short fiber layer preferably includes a short fiber having hydrophilicity. By making the short fiber layer hydrophilic, when the fibers are entangled by hydroentanglement treatment, the entanglement between the cellulosic fiber layer and the short fiber layer becomes stronger, and the elongation stress during drying is large. A coated sheet can be obtained. Further, when the short fiber layer is a hydrophilic layer, the stress at the time of elongation becomes small when wet, and therefore, there is little or no hindrance to the stretchability of the elastomer nonwoven fabric when it is impregnated with cosmetics. Furthermore, when the short fiber layer is a hydrophilic layer, in the coated sheet of the present invention, the short fiber layer becomes a liquid retaining layer together with the cellulosic fiber layer, and the amount of impregnation of the liquid cosmetic can be increased. The hydrophilic fiber is preferably contained in the short fiber layer in an amount of 50% by mass or more, more preferably 70% by mass or more, and most preferably 100% by mass.

  The hydrophilic short fiber is more preferably a cellulose short fiber. Cellulosic fibers refer to fibers made of cellulose or containing cellulose as a main component. More specifically, the cellulose fibers are pulps such as mechanical pulp, regenerated pulp and chemical pulp; viscose rayon, cupra, and solvent-spun cellulose fibers (for example, lentung lyocell (registered trademark) and tencel (registered trademark)), etc. Regenerated fibers; and plant-based natural fibers such as hemp (including bast fibers and fibers collected from leaf stems or leaves), cotton (cotton), and the like.

  The pulp fibers may be produced by conventional methods using coniferous wood or hardwood wood. In general, the fineness of the pulp fiber is about 1.0 to 4.0 dtex and the fiber length is about 0.5 to 4.5 mm. However, pulp having a fineness and / or fiber length outside this range is used. May be. The short fiber layer consisting of pulp fibers can be provided as an airlaid web or wet nonwoven, or it can also be provided as flocculent pulp (fluff pulp).

  As described above, wet nonwoven fabrics containing or consisting solely of pulp fibers include paper. Paper containing or consisting of pulp fibers includes tissue (also referred to as tissue paper). The short 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 cellulose short fibers other than pulp (for example, cotton, viscose rayon and solvent-spun cellulose fibers) or synthetic fibers (for example, polypropylene fibers and polyester fibers). A wet nonwoven fabric made of pulp fibers is preferably used because it imparts hydrophilicity to the covering sheet and increases the degree of entanglement when the fibers are entangled by hydroentanglement treatment. When a wet nonwoven fabric made of pulp fibers is used as a short fiber layer, the resulting coated sheet has increased rigidity. Therefore, when a covering sheet is cut, in particular, a product having a sharp outline can be obtained without any outline.

  When using recycled fiber, the fineness is preferably about 0.5 to 6 dtex, more preferably about 0.5 to 5 dtex. If the fineness of the regenerated fiber is too small, the short fiber layer becomes too dense.For example, as will be described later, when the layers constituting the covering sheet are integrated by the hydroentanglement process, the water does not easily pass through and the short fiber layer is short. The fiber layer and / or the cellulosic 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 short fiber layer containing the regenerated fiber is preferably provided in the form of a wet nonwoven fabric. The reason is as described above.

  The short fiber layer may be formed of natural fibers or synthetic fibers other than cellulosic fibers. Natural fibers are, for example, silk and wool, and synthetic fibers are ethylene, vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, ethylene, such as polyethylene, polypropylene, polymethylpentene, or ethylene-propylene copolymer. -(Meth) acrylic acid copolymer, polyolefin fiber comprising ethylene- (meth) acrylic acid methyl copolymer, polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate Polyester fiber made of nylon, polyamide fiber made of nylon 6 or nylon 66, acrylic fiber made of acrylonitrile, polycarbonate, polyacetal, polystyrene, cyclic polyolefin It is composed of fibers and the like from any engineering plastics. The synthetic fiber may be a single fiber made of a single resin or a mixed resin, or may be a composite fiber in which two or more different resin components are combined. Specifically, the composite fiber may be a core-sheath composite fiber, an eccentric core-sheath composite fiber, or a split-type composite fiber. These fibers may be subjected to a hydrophilic treatment as necessary.

  The fineness of natural fibers or synthetic fibers other than cellulosic fibers is preferably 0.5 to 6 dtex, more preferably 0.9 to 3.3 dtex, and 1.0 to 2.2 dtex. Even more preferred. The problem when the fineness of these fibers is too small or too large is as described above in relation to the recycled fibers. In particular, natural fibers or synthetic fibers other than cellulosic fibers having a fineness exceeding 0.5 dtex are preferably used since the productivity of the fibers and the productivity of the nonwoven fabric is good when the short fiber layer is provided as a nonwoven fabric. .

The basis weight of the short fiber layer is appropriately selected according to the basis weight of the laminate and the covering sheet to be obtained, the basis weight of the elastomer nonwoven fabric to be laminated, and the like. For example, when the basis weight of the elastomer nonwoven fabric is 5 to 50 g / m ² as described above, the basis weight of the short fiber layer is preferably 5 to 50 g / m ² , and more preferably 10 to 40 g. / M ² , more preferably 12 to 30 g / m ² . If the basis weight of the short fiber layer is less than 5 g / m ² , the strength of the short fiber layer becomes too weak, and the short fiber layer may break due to the tension applied when the cellulose fiber layer is laminated on the laminate. If it exceeds 50 g / m ² , the stretchable characteristic of the elastomer nonwoven fabric does not appear in the finally obtained coated sheet, and the stretchable characteristic of the short fiber layer may be dominant.

  The elastomer nonwoven fabric and the short fiber layer of the laminate are bonded with fibers containing a thermoplastic elastomer before being integrated with the cellulosic fiber layer, and after being integrated with the cellulosic fiber layer, in part In addition, it may be present in a state of being bonded by a fiber containing a thermoplastic elastomer. Thereby, stabilization of the coating sheet by a short fiber layer becomes higher. Or the laminated body which the short 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 a cellulosic fiber layer. Alternatively, the elastomer nonwoven fabric and the short 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 cellulosic fiber layer.

Basis weight of the laminate, by selecting the basis weight of the cellulosic fiber layer and the short fiber layer is determined, for example, more that is preferably 10 to 100 g / ^{m 2,} is 10 to 60 g / ^{m 2} preferably, further 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 short fiber layer is uneven, and it is difficult to obtain good stretch properties. 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.

  In the laminate, the short fiber layer may be located only on one surface of the elastomer nonwoven fabric, or the short fiber layer may be located on both surfaces of the elastomer nonwoven fabric. Alternatively, the laminate may have a configuration of elastomer nonwoven fabric / short fiber layer / elastomeric nonwoven fabric.

[Cellulose fiber layer]
The cellulosic fiber layer is a fiber layer containing cellulosic fibers. The meaning of “cellulosic fiber” is as described above in connection with the short fiber layer. The term “cellulosic fiber” is used to represent one type when classified by the main component, regardless of the production process. Cellulosic fibers are specifically regenerated fibers such as viscose rayon, cupra, and solvent-spun cellulose fibers (eg, lentung lyocell® and Tencel®); and hemp (bast fibers and leaf stems) (Including fibers collected from leaves), bamboo-based natural fibers such as bamboo, kapok, kenaf, cotton (cotton).

  A suitable cellulosic fiber for constructing the sheet of the present invention is cotton. Cotton has a long history of use as a natural material and is widely used as a material for clothing, underwear and hygiene materials, giving the general consumer the impression that it is skin-friendly, tactile and safe. ing. Therefore, the use of cotton can provide a product that is more easily accepted by consumers. In addition, non-woven fabrics made of only cotton or a mixture of cotton and other fibers are generally inferior in mechanical properties. For example, when wrinkles (or folds) are made on the non-woven fabric, the non-woven fabric is torn. There is. However, if a fiber layer is formed from cotton and placed on one or both sides of a laminate of elastomer nonwoven fabric / short fiber layer and integrated, mechanical properties are improved and wrinkles (or creases) are easily formed. can do.

  As the cotton, those generally used for nonwoven fabric production can be arbitrarily used. Specifically, cotton having a fiber length (average fiber length) of about 20 to 60 mm can be used. The cellulosic fiber layer may include a plurality of cottons having different fineness, fiber length and / or type. In the case of taking the configuration of the sheet of the present invention, the cellulosic fiber layer in which the cotton having a long fiber length and the cotton having a short fiber length are mixed is a fiber layer composed only of a fiber having a long fiber length (generally giving a better tactile sensation) Give the same feel. The reason is not clear, but this allows the use of cheap cotton. For example, the cellulosic fiber layer may include, for example, cotton (eg, combed cotton) having a fiber length of about 10 mm.

  Alternatively, rayon is also preferably used as the cellulosic fiber. The fineness of the rayon is preferably from 0.5 to 6 dtex, more preferably from 0.9 to 5 dtex, and even more preferably from 1.0 to 3.3 dtex. Rayon is preferably used because it has excellent water absorption and is industrially produced and easily available as a uniform fiber. In particular, cellulosic fibers having a fineness exceeding 0.5 dtex are preferably used since the productivity of fibers and nonwoven fabrics is good.

  The cellulosic fiber layer contains at least 20% by mass of cellulosic fibers, preferably at least 50% by mass, and even more preferably at least 80% by mass. The cellulosic fiber layer may be composed of only cellulosic fibers (that is, 100% by mass). When the proportion of the cellulosic fiber is less than 20% by mass, it is impossible to obtain the effects (good tactile sensation, liquid absorption and liquid retention) due to the use thereof. In addition, the use of 50% by mass or more of the cellulosic fiber is preferable because it can give a sense of security to a user who does not like the synthetic fiber to hit the skin.

  When the cellulosic fiber absorbs the cosmetic, the cellulosic fiber hangs like a rice pad by the weight of the cosmetic and bends to form a loop. When this loop is exposed on the surface of the sheet (that is, the fiber tip does not protrude on the surface of the sheet), the coated sheet impregnated with the cosmetic has a soft tactile feeling with little irritation to the skin. Inferred. If such loop formation contributes to improvement in tactile sensation, it can be explained that excellent tactile sensation can be obtained even when, for example, a cellulosic fiber having a fineness of about 4 dtex is used. On the other hand, synthetic fibers generally have a lower water absorption than cellulosic fibers, and therefore, even when impregnated with cosmetics, the amount of liquid absorbed by the fibers is small and the tip is not easily bent. For this reason, synthetic fibers (especially those having a fineness exceeding 1 dtex) have a tip protruding from the surface even in a coated sheet impregnated with cosmetics, and tend to give the skin a tingling sensation. it is conceivable that.

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

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

  In the covering sheet of this invention, the liquid absorption property and liquid retention property of a cellulosic fiber layer can be utilized. Therefore, the sheet of the present invention can retain the same amount of cosmetics even if the basis weight is reduced as compared with, for example, a sheet in which a fiber layer corresponding to a cellulosic fiber layer is composed only of synthetic fibers. . This makes it possible to provide a thin skin-covering sheet, and thus, for example, a larger number of sheets can be accommodated in a package of a given volume.

  The cellulosic fiber layer may include fibers other than cellulosic fibers. For example, natural fibers other than synthetic fibers and cellulosic fibers may be included. Specific examples of these fibers are as described above in connection with the short fiber layer. In particular, synthetic fibers such as polyester fibers and polyolefin fibers have a relatively small degree of entanglement between fibers when the fibers are entangled by, for example, water flow. Low stress (easily stretched). Synthetic fibers such as polyester fibers and polyolefin fibers are flexible with little irritation to the skin. For these reasons, synthetic fibers such as polyester fibers and polyolefin fibers are preferably used together with cellulose fibers. The fineness of fibers other than cellulosic fibers is not particularly limited, and preferably has the same fineness as that of cellulosic fibers. More specifically, the non-cellulosic fibers preferably have a fineness of 0.5 to 6 dtex, more preferably more than 0.5 dtex and 4 dtex or less, and 0.9 to 3.3 dtex. It is even more preferable that the fineness is as follows.

  When the cellulosic fiber layer is formed using cellulosic fibers and synthetic fibers, the ratio of these fibers is preferably cellulosic fibers: synthetic fibers = 9: 1 to 2: 8 (mass ratio), It is more preferable to set it as 5: 5-8: 2. If the proportion of the synthetic fiber is too small, the initial elongation stress tends to be high, and the covering sheet may be difficult to stretch. If it is too large, the liquid-absorbing property and the liquid retaining property due to the cellulosic fiber cannot be obtained. Sometimes.

  When the fiber other than the cellulosic fiber is a synthetic fiber, the synthetic fiber is 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 thermoplastic elastomer in a large amount is contained in the cellulosic fiber layer, the cellulosic fiber layer has excessive stretchability, and after the covering sheet is stretched, a force to recover (for example, , Return 25% elongation stress) may be too high.

  The fiber length of the fibers constituting the cellulosic fiber layer, that is, when the cellulosic fiber and other fibers are contained in the cellulosic fiber layer, the fiber length of the other fibers is the web length employed in the production method described later. Depending on the form, it is selected within a range of 2 to 100 mm, for example. The fiber length of the fibers constituting the cellulosic fiber layer is longer than the fiber length of the short fibers. When the fiber length of the cellulosic fiber layer is longer than the fiber length of the short fiber, the texture is good and a flexible covering sheet can be obtained. More strictly speaking, the fiber constituting the cellulosic fiber needs to have a longer average fiber length than the average fiber length of the short fibers. More specifically, the average fiber length of the fibers of the cellulosic fiber layer is preferably 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).

  When the cellulosic fiber is rayon, the fiber length of the rayon is preferably 20 to 100 mm, more preferably 25 to 75 mm, and even more preferably 30 to 60 mm. When the cellulosic fiber layer contains fibers other than the cellulosic fibers, the fiber length of the other fibers is preferably 20 to 100 mm, more preferably 25 to 75 mm, and more preferably 30 to 60 mm. Even more preferred. The fiber length of the cellulosic fiber and the fiber length of the other fibers may be the same or different.

The basis weight of the cellulose fiber layer is preferably 10 g / m ² or more and 160 g / m ² or less. A more preferred basis weight of the cellulosic fiber layer is 15 g / m ² or more and 120 g / m ² or less. When the basis weight of the cellulosic fiber layer is less than 10 g / m ² , the thickness of the cellulosic fiber layer becomes small, so that when the fibers constituting the short fiber layer are exposed on the surface and come into contact with the skin, irritation is caused. May give. If the basis weight of the cellulosic fiber layer exceeds 160 g / m ² , the entanglement between the fibers may be insufficient. On the other hand, if the basis weight of the cellulosic fiber layer exceeds 160 g / m ² , the basis weight of the covering sheet may increase, and a feeling of pressure may be imparted when it is brought into close contact with the skin.

  The form before the cellulosic 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, air lay web, and wet papermaking Any form selected from the web or the like may be used. Considering processability and texture, the cellulosic 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 coated sheet of the present invention, a cellulosic fiber layer is laminated on one or both surfaces of the laminate, and fibers containing a thermoplastic elastomer, short fibers, and cellulosic fibers are entangled and integrated. 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 a plurality of layers is small, and the desired effects (appropriate stretchability by the elastomer nonwoven fabric, liquid absorbency of the cellulose fiber layer, liquid retention and Tactile sensation, dimensional stability during manufacturing and processing with a short fiber layer may not be obtained. When the basis weight of the covering sheet is large, any one layer or a plurality of basis weights may be large, and the desired effect may not be obtained.

  In the covering sheet of the present invention in which each layer is 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 each of the short fiber layer and the elastomer nonwoven fabric exists 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 covering sheet of the present invention, at least one surface of the laminate is covered with a cellulosic fiber layer. Therefore, the appearance of at least one of the surfaces and the touch and texture of the surface are governed by the cellulosic fiber layer. When both surfaces of the sheet are composed of a cellulosic fiber layer, for example, tackiness of the elastomer nonwoven fabric and fuzz of short fibers contained in the short fiber layer are not observed. Further, as described above, the cellulosic fiber layer gives a good tactile sensation with less irritation to the skin when impregnated with a cosmetic.

  According to JIS L 1096 8.12.2 A method (wet state, strip method) (2006), the coated sheet of the present invention was prepared by using a constant speed tension type tensile tester, Immediately after being stretched at a gripping interval of 10 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 covering 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 covering 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 tensile 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 20% elongation is 0.08 N / 5 cm or more and 1.4 N / 5 cm or less in at least one direction, and is 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 4.0 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.

  It is preferable that the index is within a predetermined range even when dried (that is, in a standard state) so that the coated sheet of the present invention 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. Or less, and most preferably 0.50 N / 5 cm or more and 1.70 N / 5 cm or less. The stress at the time of 20% elongation after returning to the standard state is preferably 0.10 N / 5 cm or more and 1.5 N / 5 cm or less, more preferably 0.20 N / 5 cm or more and 1.0 N / 5 cm or less. Most preferably, it is 20 N / 5 cm or more and 0.80 N / 5 cm or less. 2. The stress at 20% elongation in the standard state is preferably 1.50 N / 5 cm or more and 10.0 N / 5 cm or less, more preferably 2.0 N / 5 cm or more and 9.0 N / 5 cm or less. Most preferably, it is 0 N / 5 cm or more and 8.0 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).

  Since the coated sheet of the present invention uses cellulosic fibers, the extensibility in the dry state tends to be higher than that in the wet state. Specifically, in at least one direction (particularly the transverse direction), the stress at 30% elongation and the stress at 5%, 10%, 15%, 20% and 25% elongation before 30% elongation, The dry value is larger than the wet value. More specifically, each stretching stress when wet is preferably less than 70% of that when dry, preferably less than 60%, or more preferably less than 50%. This is because the coated sheet of the present invention is not easily stretched with a slight force before being impregnated with cosmetics and is easy to process, and can be stretched with a relatively small force after impregnating the cosmetics. It shows what you can do. Therefore, the user can stretch the sheet without feeling excessive stress when he / she wants to apply it to the skin while stretching the covering sheet.

In the coated sheet of the present invention, the strain at 30% elongation is preferably 20% or less, more preferably 16% or less, in any one direction of the sheet, both in the wet state and in the dry state. The distortion at the time of 30% elongation is a factor indicating the resilience after the sheet is stretched, and the smaller this value, the more the sheet is restored to its original state. When the distortion is small, the adhesion of the covering sheet to the face tends to be improved. Here, the strain at 30% elongation is measured by the following method.
[Distortion at 30% 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 (returning elongation stress) becomes 0 after 30% elongation and 30% elongation under the condition of 3 cm / min. Length L (cm) (3 significant digits) is measured, and the strain at 30% elongation is determined from the formula of strain (%) = {(L-10.0) /10.0} × 100.

  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 laminated body is manufactured. In the laminate, fibers containing thermoplastic elastomer are accumulated on one surface of a short fiber layer composed of short fibers having a fiber length of 0.5 mm or more and 20 mm or less to form a nonwoven fabric, and the melted or softened material is accumulated. It is preferable that the short fiber layer and the non-woven fabric containing the fiber containing the thermoplastic elastomer are bonded to each other with the fiber containing the thermoplastic elastomer.

  The fiber accumulation is preferably carried out by a meltblown method or a spunbond method. When the thermoplastic elastomer fibers are accumulated on the short fiber layer by the melt blown method or the spun bond method, the fibers immediately after the accumulation are melted or softened. The fibers of the short fiber layer are bonded. 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 short 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, the melt blown method is a short fiber placed on a collecting belt by melt-extrusion of resin, blown fiber spun from a melt blown spinneret as a fine fiber flow by high-temperature and high-speed gas, and placed on a collection belt This can be done by collecting on the 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. It can be carried out by collecting the fibers on the short fiber layer placed on the web collecting device and then bonding the fibers to each other using a heating device such as a hot air spraying device or a heating roll, if necessary. .

  When the short fiber layer is positioned on both surfaces of the elastomer nonwoven fabric, after the elastomer nonwoven fabric is formed on the short fiber layer by the above method, the fiber containing the thermoplastic elastomer is melted or softened. A fiber layer is laminated | stacked, a pressure is applied as needed and it is made to adhere.

  Or you may prepare an elastomer nonwoven fabric and a short fiber layer separately, and may join them by heat processing, such as a hot roll or a hot-air spraying 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 short fiber layer does not become too strong.

  Next, a multilayered laminate (hereinafter, this laminate is also referred to as “multilayer laminate”) is prepared so that a web containing cellulosic fibers is positioned on at least one surface of the laminate. When the short 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. A multilayer laminate is a four-layer or five-layer laminate when short fiber layers are disposed on both surfaces of the elastomer nonwoven fabric, or when an elastomer nonwoven fabric is disposed on both surfaces of the short fiber layer. It is produced as.

  In the multilayer laminate, as described above, the cellulosic fiber web may be in any form selected from a card web, its cross lay web and chris cross web, air lay web, wet papermaking web, and the like.

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

  The coated sheet of the present invention has the same mechanical properties, particularly stretching properties, even when the water pressure is lowered, compared to a nonwoven fabric produced using a synthetic fiber-only web instead of the cellulosic fiber web. realizable. This is considered to be because cellulosic fibers generally have hydrophilicity. Therefore, the coating sheet of this invention can be obtained as what has the soft tactile sense in which the fibers intertwined with the low-pressure water flow.

  By the hydroentanglement treatment, the adhesion between the short fiber layer and the elastomer nonwoven fabric is broken, and in the resulting coated sheet, the short fiber layer and the elastomer nonwoven fabric may be integrated only by the intertangling of the fibers. Even in such a case, the effect of the short fiber layer (reduction in width at the time of production and / or processing) and the effect of the elastomer nonwoven fabric (ensure the stretchability of the entire composite sheet) can be sufficiently obtained.

  When the laminate is a two-layer structure comprising an elastomer / short fiber layer, preferably the water stream is jetted from the side of the cellulosic fiber web adjacent to the elastomeric nonwoven fabric of the laminate and then into the short fiber layer of the laminate. Spray from the side of the adjacent cellulosic fiber web. By ejecting the water flow in this order, the short fiber layer is hardly broken in the covering sheet, particularly when the short fiber layer contains hydrophilic fibers, and can be more reliably left as one layer.

  In the cover sheet manufactured by performing the water flow entanglement process, the portion where the water flow is injected may form a stripe-shaped recess. The concave portion is easily formed particularly when the short fiber layer includes hydrophilic short fibers. In the concave portion, since the hydrophilic fibers constituting the short 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 broken, and a part of the structure may be a three-layer structure of cellulose-based fiber layer / elastomer nonwoven fabric / cellulosic fiber layer, but the multi-layer structure remains 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 short 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.

  Or you may manufacture the coating sheet of this invention by the method of integrating a laminated body and the fiber web containing a cellulosic fiber with a needle punch. Alternatively, the coated sheet of the present invention may be manufactured by combining needle punch and hydroentanglement treatment. Alternatively, in the coated sheet of the present invention, a cellulosic fiber web, a short fiber layer, and an elastomer nonwoven fabric are separately prepared, and a multilayer laminate obtained by simply superimposing them is integrated by hydroentanglement treatment and / or needle punching. You may manufacture by the method to do.

  Next, 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 preferably adjusted so that the viscosity is 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 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.

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

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

(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).

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

[Production of Laminate A]
As the short 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 formed on 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 short fiber layer A laminate comprising:

[Production of Laminate B]
As the short 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 mass of thermoplastic elastomer (styrene elastomer product name: Kraton 1657G, manufactured by Kraton Polymer Japan Co., Ltd.) is applied to the surface of the tissue. Resin and 40% by mass of a polypropylene resin are accumulated on a tissue so as to have a basis weight of 15 g / m ² by a melt blown method, and a laminate B composed of an elastomer nonwoven fabric and a short fiber layer is obtained. Obtained.

Accumulation of fibers by the melt blown method was performed according to the following conditions.
Polymer melting temperature (° C.) 290
Polymer discharge rate (g / min) 0.1
Hot air temperature (℃) 300
Hot air flow rate (m3 / min) 2.7
Hot air pressure (MPa) 0.47
Orifice hole diameter (mm) 0.3
Nozzle width (mm) 800
Nozzle pitch (mm) 1
Production speed (m / min) 10

[Production of Laminate C]
As the short 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 conveyor belt of a meltblown apparatus and continuously supplied, 100% by mass of a thermoplastic elastomer (hydrogenated styrene-isoprene-styrene elastomer) is applied to the surface of the tissue by the meltblown method. Thus, a laminated body composed of an elastomer nonwoven fabric (trade name: manufactured by Kuraray Co., Ltd.) and a short fiber layer was obtained so as to have a basis weight of 10 g / m ² on the tissue.

  For laminates A to C, the short fiber layer was peeled from the laminate, and the transverse elongation at break of the elastomer nonwoven fabric, the 20% elongation stress, the return 25% elongation stress, and the return 20% elongation stress, In addition, the air permeability of the nonwoven fabric was measured. The measurement results are shown in Table 1.

[Sample 1]
Two parallel card webs each having a basis weight of about 35 g / m ² made of cotton (including fibers having a fiber length of 10 to 60 mm, an average fiber length of 26 mm, trade name MS-D, manufactured by Marusan Sangyo Co., Ltd.) It was produced as a cellulosic fiber web and a second cellulosic fiber web. A laminate having a four-layer structure in which the first cellulosic fiber web is disposed on both sides of the laminate A at a position adjacent to the surface of the elastomer nonwoven fabric, and the second cellulosic fiber web is disposed at a position adjacent to the surface of the short fiber layer. A body was formed and subjected to hydroentanglement treatment.

  In the hydroentanglement treatment, a columnar water stream having a water pressure of 2.5 MPa is applied once to the surface of the first cellulosic fiber web of the laminated body using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. This was performed by spraying a columnar water flow having a water pressure of 3.0 MPa once toward the surface of the second cellulosic 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.

[Sample 2]
The hydroentanglement treatment is performed by spraying a columnar water flow having a water pressure of 3.0 MPa once toward the surface of the first cellulosic fiber web, and applying a columnar water flow having a water pressure of 3.5 MPa toward the surface of the second cellulosic fiber web. A coated sheet was obtained using the same fiber and structure as Sample 1 except that the injection was carried out once and following the same procedure employed when Sample 1 was manufactured.

[Sample 3]
Viscose rayon with a fineness of 1.7 dtex and a fiber length of 40 mm (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.) and polyethylene terephthalate fiber with a fineness of 1.6 dtex and a fiber length of 44 mm (trade name of 70 W, manufactured by Toyobo Co., Ltd.) Were mixed at a ratio of 8: 2 (mass ratio). Two parallel card webs having a weight per unit area of about 35 g / m ^{2 made} of the mixed fibers were produced as first and second cellulosic fiber webs, respectively. A laminate having a four-layer structure in which the first cellulosic fiber web is disposed on both sides of the laminate A at a position adjacent to the surface of the elastomer nonwoven fabric, and the second cellulosic fiber web is disposed at a position adjacent to the surface of the short fiber layer. A body was formed and subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water stream having a water pressure of 2.5 MPa is applied once to the surface of the first cellulosic fiber web of the laminated body using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. This was performed by spraying a columnar water flow having a water pressure of 3.0 MPa once toward the surface of the second cellulosic 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.

[Sample 4]
Two parallel card webs having a basis weight of about 34 g / m ² made of viscose rayon (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.) having a fineness of 1.7 dtex and a fiber length of 40 mm are respectively made of first and second cellulosic fibers. Made as a web. A laminate having a four-layer structure in which the first cellulosic fiber web is disposed on both sides of the laminate B adjacent to the surface of the elastomer nonwoven fabric, and the second cellulosic fiber web is disposed adjacent to the surface of the short fiber layer. A body was formed and subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water flow having a water pressure of 3.0 MPa is applied once to the surface of the first cellulosic fiber web of the laminate using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. This was carried out by spraying a columnar water flow having a water pressure of 3.5 MPa once toward the surface of the second cellulosic 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.

[Sample 5]
A parallel card web having a basis weight of about 34 g / m ² made of viscose rayon (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.) having a fineness of 1.7 dtex and a fiber length of 40 mm was produced as a first cellulosic fiber web. In addition, a parallel card web having a basis weight of about 34 g / m ² made of polyethylene terephthalate fiber (trade name: 70 W, manufactured by Toyobo Co., Ltd.) having a fineness of 1.6 dtex and a fiber length of 44 mm was produced as a second fiber web. A laminate having a four-layer structure is formed by disposing a first cellulosic fiber web at a position adjacent to the surface of the elastomer nonwoven fabric and a second fiber web at a position adjacent to the surface of the short fiber layer on both surfaces of the laminate B. Formed and subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water flow having a water pressure of 4.0 MPa is applied once to the surface of the first cellulosic fiber web of the laminated body using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. This was carried out by spraying a columnar water flow having a water pressure of 4.0 MPa once toward the surface of the second cellulosic 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.

[Sample 6: Comparison]
Two parallel card webs having a basis weight of about 41.5 g / m ² made of cotton (including fibers with a fiber length of 10 to 60 mm, average fiber length of 26 mm, trade name MS-D, manufactured by Marusan Sangyo Co., Ltd.) It produced as a 1st cellulosic fiber web and a 2nd cellulosic fiber web. Two cellulosic fiber webs were placed on both sides of the tissue (weight per unit area: 17 g / m ² ) used for the production of the laminate to form a three-layer laminate, which was subjected to hydroentanglement treatment.

  In the hydroentanglement treatment, a columnar water stream having a water pressure of 2.5 MPa is applied once to the surface of the first cellulosic fiber web of the laminated body using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. This was performed by spraying a columnar water flow having a water pressure of 3.0 MPa once toward the surface of the second cellulosic 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.

[Sample 7: Comparison]
The hydroentanglement treatment is performed by spraying a columnar water stream having a water pressure of 3.0 MPa once toward the surface of the first cellulosic fiber web, and applying a columnar water stream having a water pressure of 3.0 MPa toward the surface of the second cellulosic fiber web. A coated sheet was obtained using the same fiber and configuration as Sample 6 except that the injection was carried out once and following the same procedure employed when Sample 6 was produced.

[Sample 8: Comparison]
Two parallel card webs having a basis weight of about 35 g / m ² made of polyethylene terephthalate fibers (product name: 70 W, manufactured by Toyobo Co., Ltd.) having a fineness of 1.6 dtex and a fiber length of 44 mm are produced as first and second fiber webs, respectively. did. On both surfaces of the laminate A, a first fiber web is disposed at a position adjacent to the surface of the elastomer nonwoven fabric, and a second fiber web is disposed at a position adjacent to the surface of the short fiber layer to form a laminate having a four-layer structure. This was subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water flow having a water pressure of 3.0 MPa is sprayed once toward the surface of the first fiber web of the laminate using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. A columnar water flow having a water pressure of 3.5 MPa was jetted once toward the surface of the second 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.

[Sample 9: Comparison]
Two parallel card webs each having a basis weight of about 35 g / m ² made of acrylic fiber (trade name: Toleron, manufactured by Toray Industries, Inc.) having a fineness of 1.0 dtex and a fiber length of 38 mm were prepared as first and second fiber webs, respectively. . A laminated body having a four-layer structure is formed by disposing a first fiber web on both sides of the laminate B at a position adjacent to the surface of the elastomer nonwoven fabric and a second fiber web at a position adjacent to the surface of the short fiber layer. This was subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water flow having a water pressure of 4.5 MPa is sprayed once toward the surface of the first fiber web of the laminate using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. A columnar water flow having a water pressure of 4.0 MPa was jetted once toward the surface of the second 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.

[Sample 10]
80% by mass of viscose rayon (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.) having a fineness of 1.7 dtex and a fiber length of 40 mm, and polyethylene terephthalate fiber (trade name 70 W, Toyobo Co., Ltd.) having a fineness of 1.6 dtex and a fiber length of 51 mm 2) Two parallel card webs having a weight per unit area of about 25 g / m ² comprising 20% by mass were prepared as the first and second fiber webs, respectively. On both surfaces of the laminate C, a first fiber web is disposed at a position adjacent to the surface of the elastomer nonwoven fabric, and a second fiber web is disposed at a position adjacent to the surface of the short fiber layer to form a laminate having a four-layer structure. This was subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water flow having a water pressure of 2.5 MPa is sprayed once toward the surface of the first fiber web of the laminate using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. A columnar water flow having a water pressure of 3.0 MPa was jetted once toward the surface of the second 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.

[Sample 11]
70% by mass of viscose rayon (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.) with a fineness of 1.7 dtex and a fiber length of 40 mm, and polyethylene terephthalate fiber (trade name 70W, Toyobo Co., Ltd.) with a fineness of 1.6 dtex and a fiber length of 51 mm 2) Two parallel card webs having a basis weight of about 25 g / m ^{2 and} made of 30% by mass were produced as first and second fiber webs, respectively. On both surfaces of the laminate C, a first fiber web is disposed at a position adjacent to the surface of the elastomer nonwoven fabric, and a second fiber web is disposed at a position adjacent to the surface of the short fiber layer to form a laminate having a four-layer structure. This was subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water flow having a water pressure of 2.5 MPa is sprayed once toward the surface of the first fiber web of the laminate using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. A columnar water flow having a water pressure of 3.0 MPa was jetted once toward the surface of the second 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.

[Sample 12]
20% by mass of viscose rayon (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.) having a fineness of 1.7 dtex and fiber length of 40 mm, and polyethylene terephthalate fiber (trade name: 70 W, Toyobo Co., Ltd.) having a fineness of 1.6 dtex and a fiber length of 51 mm 2) Two parallel card webs having a basis weight of about 25 g / m ^{2 and} made of 80% by mass were produced as the first and second fiber webs, respectively. On both surfaces of the laminate C, a first fiber web is disposed at a position adjacent to the surface of the elastomer nonwoven fabric, and a second fiber web is disposed at a position adjacent to the surface of the short fiber layer to form a laminate having a four-layer structure. This was subjected to hydroentanglement treatment. In the hydroentanglement treatment, a columnar water flow having a water pressure of 2.5 MPa is sprayed once toward the surface of the first fiber web of the laminate using a nozzle in which orifices having a hole diameter of 0.1 mm are provided at intervals of 0.6 mm. A columnar water flow having a water pressure of 3.0 MPa was jetted once toward the surface of the second 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.

  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 5 and Sample 11 both had good stretchability in a wet state, with a return 25% elongation elongation in the range of 0.30 N / 5 cm to 1.50 N / 5 cm. Since Samples 6 and 7 did not have an elastomer nonwoven fabric, they returned in the wet state and had a 25% elongation stress of 0, and did not exhibit stretchability in the wet state. Moreover, 30% elongation stress at the time of drying of Samples 1 to 5 was higher than those of Samples 8 and 9. This indicates that when a hydroentangled nonwoven fabric is produced using a cellulosic fiber layer as a surface layer, the mechanical strength is increased. On the other hand, the 30% elongation stress at the time of wetting of samples 1, 2, 3 and 5 was equivalent to that of sample 9. This indicates that the physical property change due to wetting is large in the coated sheet of the present invention. The sample 11 had a tendency that the initial stress at the time of elongation was small due to the mixing of the synthetic fiber (polyester fiber) and the basis weight was small, the return after 30% elongation was large, and the strain was small. Thus, the sheet | seat with small distortion improves the adhesiveness with respect to a face.

  Samples 1 to 12 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 shape of a face mask. Fold it once with a vertical line that passes through the center of the face (a line parallel to the direction of the nose), fold once with a vertical line that passes through the center, and then fold it once with a horizontal line that passes through the center and fold it into eight I made it. 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 masks produced using Samples 1 to 7 and 10 to 12 were sufficiently impregnated with the liquid cosmetic. The face masks produced using Samples 8 and 9 had a smaller amount of liquid cosmetic impregnation than Samples 1-7.

  Next, the face mask impregnated with the liquid cosmetic was applied to the face of the monitor while being stretched, and adhered to the face for 20 minutes. The face masks produced using Samples 1 to 5, 8 and 9, and 10 to 12 gave the monitor a sense of moderate skin stretching. The face mask produced using Samples 6 and 7 had a lower degree of sensation of skin stretching compared to the other samples.

The cosmetics retainability of Sample 1 and Sample 8 was examined by the following procedure.
As cosmetics, a cosmetic liquid 1 (manufactured by Unilever Japan, Pons Double White Fresh Lotion (for daytime)) and a cosmetic liquid 2 (manufactured by Unilever Japan, Pons double white fresh lotion (for night)) were prepared. These cosmetic liquids had different viscosities, and the viscosity of the cosmetic liquid 1 was smaller than that of the cosmetic liquid 2. The difference in viscosity between the two cosmetic liquids was confirmed by the following procedure.

  Using a Pasteur pipette 9 inch disposable (trade name IK-PAS-9P, manufactured by Iwaki Glass Co., Ltd.), 0.12 ml of a cosmetic liquid was dropped onto a glass plate from a height of 11 cm. More specifically, 0.12 ml of cosmetic liquid was divided into 5 to 6 drops and dropped into one place. After dripping, the maximum diameter and the minimum diameter of the cosmetic liquid spreading in an elliptical shape on the glass plate were measured. The measurement results are shown in Table 4 below.

  As shown in Table 4, it was found that the cosmetic liquid 1 had a large spread of the cosmetic liquid after dripping and a low viscosity as compared with the cosmetic liquid 2.

  A sheet piece having a size of 10 cm × 10 cm in the vertical direction × horizontal direction was cut out from the sample. The mass at this time is W (g) and the thickness is T (mm). Next, each of the sheet pieces was impregnated with cosmetic liquid 1 and cosmetic liquid 2, and left for 10 minutes. The mass of the sheet piece after being left is defined as W1 (g). Then, the sheet piece impregnated with the cosmetic liquid was placed on a scrim (opening interval: 10 mm) having a size of 30 cm × 30 cm in the vertical direction × horizontal direction, and the entire scrim was rotated 30 times for dehydration. Let the mass of the sheet piece after dehydration be W2 (g).

From the values of W, W1, W2 and T, the water retention rate at each stage and the water retention rate per unit thickness were calculated by the following formula.
-Water retention after impregnation = (W1-W) / W x 100
-Water retention per unit thickness after impregnation = (W1-W) / T x 100
・ Water retention after dehydration = (W2-W) / W × 100
・ Water retention rate per unit thickness after dehydration = (W2−W) / T × 100
Table 5 shows the liquid retention properties of the cosmetic liquids 1 and 2 for the samples 1 and 8, respectively.

  As to the water retention of the cosmetic liquid 1 (low viscosity), when the sample 1 and the sample 8 were compared, the water retention per unit thickness after impregnation was higher in the sample 1. From this, it was found that Sample 1 was more easily impregnated with a cosmetic liquid having a relatively low viscosity as compared with Sample 8 (the amount of water retained was large). Moreover, when the water retention rate per unit thickness after dehydration was compared, the two samples showed a greater difference. This is probably because the cosmetic liquid retained by the sample 1 is less likely to be screened in the dehydration process than that of the sample 8, that is, the amount of cosmetic liquid to be shaken off in the dehydration process is small. Furthermore, from the results of AB, the amount of the cosmetic liquid that is shaken off during dehydration is larger in sample 8 than in sample 1, and sample 1 has better water retention than sample 8 (it is difficult for liquid to drain). I understood that. In addition, about the cosmetic liquid 2 with a high viscosity, the water retention rate after spin-drying | dehydration of the sample 1 and the sample 8 was not so different.

  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 Short fiber layer 4 Laminate 5 Cellulose fiber layer

Claims (9)

A laminate in which a short fiber layer composed of short fibers having a fiber length of 0.5 to 20 mm is laminated on at least one surface of a stretchable nonwoven fabric containing fibers containing a thermoplastic elastomer, and at least one surface of the laminate Including a cellulosic fiber layer containing 20% by mass or more of cellulosic fibers,
The fiber containing the thermoplastic elastomer, the short fiber, and the cellulosic fiber are entangled with each other, so that the cellulosic fiber layer and the laminate are integrated,
The fiber length of the fibers constituting the cellulosic fiber layer is longer than the fiber length of the short fibers constituting the short fiber layer,
Skin coating sheet for cosmetic impregnation.   The skin-coated sheet for impregnating cosmetics according to claim 1, wherein the cellulosic fiber contains 50% by mass or more of cellulosic fiber.   The skin covering sheet for cosmetic impregnation according to claim 1 or 2, wherein the stretchable nonwoven fabric is a meltblown nonwoven fabric.   The skin-coated sheet for impregnating cosmetics according to any one of claims 1 to 3, wherein the cellulosic fiber is cotton.   The skin coating sheet for cosmetic impregnation according to any one of claims 1 to 4, wherein the thermoplastic elastomer is a styrene-based elastomer.   The skin-covering sheet for impregnating cosmetics according to any one of claims 1 to 5, wherein the short fiber layer is a wet papermaking nonwoven fabric made of pulp fibers.   The skin covering sheet for impregnation with cosmetics according to any one of claims 1 to 6, wherein the fibers containing the thermoplastic elastomer, the short fibers, and the cellulosic fibers are entangled with each other by hydroentanglement treatment. A nonwoven fabric is formed by accumulating fibers containing a thermoplastic elastomer on one surface of a short fiber layer made of fibers having a fiber length of 0.5 to 20 mm, and an accumulated molten or softened thermoplastic elastomer A short fiber layer and a non-woven fabric including a fiber including a thermoplastic elastomer are bonded to each other by a fiber including the laminate to obtain a laminate;
A multilayer laminate is formed by laminating a cellulose fiber layer comprising fibers having a fiber length longer than that of the fibers constituting the short fiber layer on at least one surface of the laminate, and containing 20% by mass or more of cellulose fibers. A method for producing a skin-coated sheet for impregnating cosmetics, comprising: obtaining a body; and subjecting the multilayer laminate to hydroentanglement.   The liquid cosmetic is impregnated at a ratio in the range of 100 parts by mass or more and 2000 parts by mass or less with respect to 100 parts by mass of the skin covering sheet for impregnation of cosmetics according to any one of claims 1 to 7. , Face mask.

Images