JP2016098464A - Nonwoven fabric for fluid impregnated skin coating sheet and fluid impregnated skin coating sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nonwoven fabric capable of being used for a liquid impregnated skin coating sheet under which impregnated liquid can easily remain on the skin.SOLUTION: A nonwoven fabric comprises a first fiber layer containing 50 mass% or higher of hydrophilic fiber and a second fiber layer containing 50 mass% or higher of hydrophobic fiber that is higher hydrophobic than the hydrophilic fiber contained in the first fiber layer. The first fiber layer forms one side of surface and the second fiber layer forms the other side of surface of the nonwoven fabric. The hydrophobic fiber has fineness of 1.2 decitex or higher. The nonwoven fabric, which contains two or more types of fibers with different levels of hydrophobic property as hydrophobic fibers, is a base material for a liquid impregnated skin coating sheet to be used by contacting the first fiber layer to the skin.SELECTED DRAWING: None

Description

  The present invention relates to a nonwoven fabric constituting a liquid-impregnated skin-coated sheet impregnated with a liquid, particularly a cosmetic, and a liquid-impregnated skin-coated sheet using the nonwoven fabric.

  Various sheets impregnated with a liquid, which are used to coat the human skin and apply a predetermined substance to the human skin, have been proposed and put into practical use. Specific examples include a liquid-impregnated skin-covering sheet impregnated with a liquid containing an active ingredient (for example, cosmetics) (a keratin care sheet used for face masks, heels, elbows, knees, and the like). As the base material for the liquid-impregnated skin coating sheet, a nonwoven fabric is generally used. Since liquid-impregnated skin-coated sheets are often used in close contact with the skin for a relatively long period of time, various non-woven fabrics have been proposed as base materials in terms of adhesion, liquid release, touch, and convenience. ing.

  For example, Patent Document 1 is a laminated nonwoven fabric obtained by laminating at least two layers of an ultrafine synthetic fiber layer and a hydrophilic fiber layer, and the nonwoven fabric for a beauty sheet that can be used by contacting the hydrophilic layer with the body of the laminated nonwoven fabric. Has proposed. According to Patent Document 1, this non-woven fabric is said to give a cosmetic sheet that can suppress the evaporation of the impregnated cosmetic liquid and keep the moisturizing effect for a long time. Patent Document 2 includes a first fiber layer including 50% by mass or more of a three-dimensional crimped fiber having a three-dimensional crimp, and a second fiber layer including a hydrophilic fiber, and the first fiber layer is one of the second fiber layers. The first fiber layer and the second fiber layer are integrated by entanglement of the fibers, and the three-dimensional crimp is obtained by combining the first fiber layer and the second fiber layer. A laminated nonwoven fabric that is formed by crimping in latent crimpable fibers after being entangled and integrated, and the surface of the nonwoven fabric is substantially flat and has substantially no pores. A liquid impregnated skin coating sheet is proposed.

JP 2005-124916 A JP 2007-211131 A

  In one aspect of the present invention, a liquid-impregnated skin-covering sheet in which the impregnated liquid is likely to stay on the skin, the adhesion effect and the moisturizing effect by the liquid are more exhibited, or the active ingredient contained in the liquid is easily transferred to the skin It aims at providing the nonwoven fabric which gives. In another aspect, an object of the present invention is to provide a liquid-impregnated skin-covering sheet obtained by impregnating the nonwoven fabric with a liquid, particularly a face mask.

In the first aspect, the present invention includes a first fiber layer containing 50% by mass or more of hydrophilic fibers and 50% by mass or more of hydrophobic fibers that are more hydrophobic than the hydrophilic fibers contained in the first fiber layer. A second fiber layer, wherein the first fiber layer forms one surface and the second fiber layer forms the other surface,
The hydrophobic fiber has a fineness of 1.2 dtex or more,
As the hydrophobic fiber, including two or more kinds of fibers having a difference in hydrophobicity,
Provided is a nonwoven fabric for a liquid-impregnated skin-covering sheet, which is used by bringing the first fiber layer into contact with the skin.

In the second aspect, the present invention includes a first fiber layer containing 50% by mass or more of hydrophilic fibers and 50% by mass or more of hydrophobic fibers that are more hydrophobic than the hydrophilic fibers contained in the first fiber layer. A second fiber layer, wherein the first fiber layer forms one surface and the second fiber layer forms the other surface,
The hydrophobic fiber has a fineness of 1.2 dtex or more,
As the hydrophobic fiber, including two or more kinds of synthetic fibers having different melting points of the thermoplastic resin constituting the fiber surface,
The fibers are thermally bonded to each other by a synthetic fiber having the lowest melting point of the thermoplastic resin constituting the fiber surface included in the second fiber layer,
Provided is a nonwoven fabric for a liquid-impregnated skin-covering sheet, which is used by bringing the first fiber layer into contact with the skin.

In the third aspect, the present invention provides a liquid-impregnated skin-covering sheet, wherein the nonwoven fabric according to the first aspect or the second aspect is impregnated with 600 to 2500 parts by mass of liquid.
The present invention provides, in the fourth aspect, a face mask in which the nonwoven fabric is impregnated with 600 to 2500 parts by mass of liquid.

  When the skin of the nonwoven fabric of the present invention is impregnated with the liquid, the impregnated liquid is likely to stay on the skin, and the adhesion effect and the moisturizing effect of the liquid are more exhibited or included in the liquid. A liquid-impregnated skin-covering sheet is provided in which the active ingredient is more easily transferred to the skin.

(Background to the present invention)
Patent Document 1 proposes to use a fiber obtained from a melt blown fiber, a spunbond fiber, and a split fiber as the ultrafine synthetic fiber. Among these, the melt blown fiber and the spunbond fiber are used in the form of a melt blown nonwoven fabric and a spunbond nonwoven fabric, respectively. Even if these nonwoven fabrics are laminated with a hydrophilic fiber layer and subjected to hydroentanglement treatment, the hydrophilic fibers It is difficult to entangle with the layers, and delamination tends to occur in the resulting laminated nonwoven fabric. Further, the melt blown nonwoven fabric and spunbond nonwoven fabric of ultrafine synthetic fibers have a small specific volume (bulk), and the amount of liquid that can be held by the melted nonwoven fabric tends to be small. Therefore, when a nonwoven fabric using these is impregnated with a liquid, the weight of the ultrafine synthetic fiber layer impregnated with the liquid is reduced and the force for pressing the hydrophilic fiber layer is weakened. It was found that it tends to be difficult to transfer to the skin, or tends to reduce the adhesion to the skin.

  The ultrafine fiber layer containing the ultrafine fibers obtained from the split fibers has a larger specific volume than a melt blown nonwoven fabric, etc., and a sheet in which a nonwoven fabric using this is impregnated with a liquid transfers the liquid to the skin. It is easy and increases the adhesion to the skin. However, the ultrafine fiber layer containing the ultrafine fibers obtained from the split fibers is stored in a state wound around a roll, for example, or as a liquid-impregnated skin-covered sheet and stacked in a plurality of sheets in a packaging bag. When housed and stored, the thickness decreases and the specific volume tends to decrease. Therefore, the liquid-impregnated skin-covering sheet containing the ultrafine fiber layer is also likely to show the same tendency as the sheet containing the melt blown nonwoven fabric or the like.

  The present inventors have further promoted the transfer of the liquid to the skin, ensured adhesion to the skin by the liquid located between the sheet and the skin, and exerted the action (for example, moisturizing) on the skin by the liquid. The construction of a liquid-impregnated skin-covering sheet that can be better demonstrated was studied. As a result, when the hydrophilic fiber layer is on the side in contact with the skin, the fiber layer on the side not in contact with the skin is composed of hydrophobic fibers having a fineness of 1.2 dtex or more, and the degree of hydrophobicity as the hydrophobic fibers. Liquid-impregnated skin that promotes the transition of liquid to skin by using different materials or by using two or more synthetic fibers with different melting points of the thermoplastic resin constituting the fiber surface as hydrophobic fibers The inventors have found that a coated sheet can be obtained, and have come up with the present invention.

  The non-woven fabric for the liquid-impregnated skin-covering sheet (hereinafter also simply referred to as “sheet”) of the present invention includes a first fiber layer containing 50% by mass or more of hydrophilic fibers and a hydrophilic fiber contained in the first fiber layer. And a second fiber layer containing 50% by mass or more of hydrophobic fibers that are hydrophobic, the hydrophobic fibers contained in the second fiber layer have a fineness of 1.2 dtex or more, and the second fiber layer is a hydrophobic fiber As mentioned above, it contains two or more specific fibers. Hereinafter, the configuration of each fiber layer will be described first.

(First fiber layer)
The first fiber layer contains 50% by mass or more of the hydrophilic fiber layer. The first fiber layer containing hydrophilic fibers serves to hold a liquid (eg, liquid cosmetic) impregnated in the nonwoven fabric and supply the held liquid to an object (specifically, skin).
The hydrophilic fiber is a fiber having an official moisture content of 5% or more. The official moisture content is shown in JIS L0105 (2006). When the official moisture content is not known, the value calculated from the following formula is used as the official moisture content.
Official moisture content (%) = [(W−W ′) / W ′] × 100
Here, W means the mass (g) of the fiber in an environment of a temperature of 20 ° C. and a humidity of 65% RH, and W ′ means the mass (g) when the fiber is completely dry. In addition, the mass of the fiber in the environment of temperature 20 degreeC and humidity 65% RH means the mass when a fiber is left to stand in the environment of temperature 20 degreeC and humidity 65% RH, and becomes a fixed mass, and fiber The mass at the time of absolute drying means the mass when the fiber is left in a dryer set at 105 ° C. and becomes a constant mass.

  Specific examples of hydrophilic fibers include natural fibers such as pulp, cotton, hemp, silk, and wool, regenerated fibers such as viscose rayon, cupra, and solvent-spun cellulose fibers, and synthetic fibers having hydrophilicity, or Hydrophobic synthetic fibers (synthetic fibers having an official moisture content of less than 5%) are subjected to a hydrophilic treatment. Examples of the hydrophilic treatment include corona discharge treatment, sulfonation treatment, graft polymerization treatment, kneading of a hydrophilic agent into fibers, and application of a durable oil agent. The hydrophilic fiber is preferably a cellulosic fiber. Cellulosic fibers are more specifically 1) pulps such as mechanical pulp, regenerated pulp and chemical pulp, 2) plant natural fibers such as cotton, hemp, and 3) viscose rayon, cupra, and Regenerated fibers such as solvent-spun cellulose fibers (for example, lentung lyocell (registered trademark) and tencel (registered trademark)).

  Among plant-based natural fibers, cotton has long been used as a natural material and is widely used as a material for clothes and hygiene materials. It has a general impression that it is gentle to the skin, comfortable to touch, and safe. Give to consumers. Therefore, the use of cotton can provide a product that is more easily accepted by consumers. When using cotton, the cotton generally used for nonwoven fabric manufacture can be used arbitrarily. Specifically, cotton having a fiber length (average fiber length) of about 20 to 60 mm can be used. A plurality of cottons having different fiber lengths and types may be used.

  Among the recycled fibers, viscose rayon is preferably used because it has a track record of being used in the field of cosmetic puffs and wet sheets that come into contact with human skin, and is relatively inexpensive and easy to obtain.

  The fineness of the hydrophilic fiber is preferably about 0.1 dtex to 6 dtex, more preferably about 0.3 dtex to 3.5 dtex, further preferably 0.5 to 2.5 dtex, 0.8 Most preferred is ˜1.8 dtex. A hydrophilic fiber having a fineness within this range is suitable for ensuring flexibility. When the fineness of the hydrophilic fiber is too small, the card passing property at the time of producing the fiber web is deteriorated, and the productivity of the nonwoven fabric may be lowered. If the fineness of the hydrophilic fiber is too large, the nonwoven fabric becomes rough and the tactile sensation may be reduced. In addition, if the fineness of the hydrophilic fiber is too large, the spacing and voids between the fibers in the first fiber layer are widened, the ability of the first fiber layer to hold the liquid is reduced, the amount of liquid impregnation is reduced, and the use Sometimes a liquid (for example, cosmetics or chemicals) hangs down, so-called dripping occurs and the feeling of use may be lowered.

  The first fiber layer contains 50% by mass or more of hydrophilic fibers, preferably 70% by mass or more, and more preferably 90% by mass or more. The first fiber layer may be composed of only hydrophilic fibers. When the ratio of the hydrophilic fibers is small, the ability of the first fiber layer to hold the liquid is reduced, and the sheet cannot be impregnated with a predetermined amount of liquid, or the liquid is transferred to the skin (hereinafter referred to as “liquid”). May also be insufficient, or may not be able to supply a sufficient amount of liquid to the skin. When the first fiber layer includes fibers other than the hydrophilic fibers, the other fibers may be hydrophobic fibers. The hydrophobic fiber will be described later in connection with the second fiber layer. As another fiber, one kind of hydrophobic fiber may be used, and two or more kinds of hydrophobic fibers may be used.

  The fiber length of the fibers constituting the first fiber layer is appropriately selected according to the form of the first fiber layer. For example, when the first fiber layer is produced as a card web, the fiber length of the constituent fibers is preferably 25 mm or more and 100 mm or less, more preferably 30 mm or more and 70 mm or less, and 36 mm or more and 65 mm or less. More preferably. When the first fiber layer is produced as an air laid web, the fiber length of the constituent fibers is preferably 1 mm or more and 50 mm or less, and more preferably 5 mm or more and 30 mm or less. When the first fiber layer is produced as a wet papermaking web, the fiber length of the constituent fibers is preferably 0.5 mm or more and 20 mm or less, and more preferably 1 mm or more and 10 mm or less.

  The first fiber layer may be composed of only one layer (single layer structure) or may have a laminated structure in which two or more layers are laminated. For example, a 1st fiber layer may consist of a layer containing 50 mass% or more of cotton, and a layer (for example, tissue) containing a pulp. When the layer containing pulp is contained in the first fiber layer, it is preferable that the layer containing pulp is located inside and does not form the surface of the nonwoven fabric. This is because pulp has a short fiber length and easily falls off.

The basis weight of the first fiber layer is appropriately selected according to the basis weight of the nonwoven fabric to be finally obtained. Basis weight of the first fiber layer is preferably ^{20g / m 2 ~80g / m 2} , more preferably from ^{25g / m 2 ~60g / m 2} , further preferably 30g / m ² ~50g / m ² There, most preferably ^{35g / m 2 ~45g / m 2} . The ratio of the basis weight of the first fiber layer to the basis weight of the second fiber layer (the basis weight of the first fiber layer / the basis weight of the second fiber layer) is preferably 0.5 to 16, more preferably 0.8 to 6. 0.0, more preferably 1.2 to 4.0, most preferably 1.4 to 3.0.

  If the basis weight of the first fiber layer is too small, or if the ratio of the basis weight of the first fiber layer to the basis weight of the second fiber layer is too small, the amount of liquid retained by the entire liquid-impregnated skin-coated sheet is reduced, and the liquid transferability May be insufficient, or the amount of liquid supplied to the skin itself may be reduced. If the basis weight of the first fiber layer is large or the ratio of the basis weight of the first fiber layer to the basis weight of the second fiber layer is too large, the ratio of the second fiber layer to the entire nonwoven fabric becomes small, and the liquid transferability of the sheet May be insufficient. Further, if the basis weight of the first fiber layer is too large, or if the ratio of the basis weight of the first fiber layer to the basis weight of the second fiber layer is too large, the entire nonwoven fabric impregnated with the liquid may be too soft. Therefore, for example, when sheets impregnated with liquid are stacked, it becomes difficult to peel off and remove only one sheet, or when the sheet impregnated with liquid is folded with the first fiber layer inside The feeling of use may decrease, for example, it may be difficult to spread the sheet.

(Second fiber layer)
The second fiber layer includes two types of hydrophobic fibers having a specific fineness. The hydrophobic fibers contained in the second fiber layer are higher in hydrophobicity than the hydrophilic fibers contained in the first fiber layer, and therefore the second fiber layer is stronger in hydrophobicity than the first fiber layer. Showing gender. Therefore, when the sheet of the present invention is impregnated with a liquid and the skin is covered with the sheet so that the first fiber layer is in contact with the skin, the second fiber layer is the first fiber layer whose liquid is more hydrophilic. The liquid moving to the side and moving to the first fiber layer side further moves to the skin. Further, in the nonwoven fabric of the present invention, the second fiber layer has hydrophobicity because it contains hydrophobic fibers having a specific fineness, and when a force is applied in the thickness direction and when the liquid is impregnated However, the gaps between the fibers can be relatively retained in the layer. Since the gap between the fibers becomes a part that holds the liquid, the second fiber layer can hold more liquid as the ratio of the gap is larger. Therefore, when the sheet of the present invention is impregnated with the liquid, the first fiber layer is pressed toward the skin by the weight of the liquid held in the bulky second fiber layer, and this also causes the liquid to enter the skin. It is assumed that the transition will be further promoted.

  The hydrophobic fiber contained in the second fiber layer is, for example, a fiber made of a thermoplastic resin or a surface of a hydrophilic fiber that has been subjected to a treatment for imparting hydrophobicity (hydrophobization treatment). The thermoplastic resin is not particularly limited. For example, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate and copolymers thereof, polypropylene, polyethylene ( High-density polyethylene, low-density polyethylene, linear low-density polyethylene, etc.), polyolefin resins such as polybutene-1, ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer, nylon 6, nylon 12, and Polyamide resins such as nylon 66, acrylic resins, polycarbonate, polyacetal, engineering plastics such as polystyrene and cyclic polyolefin, and elastomers thereof It is selected to Luo arbitrary. The fiber in which the surface of the hydrophilic fiber has been subjected to a hydrophobic treatment is, for example, one obtained by treating the surface of a regenerated fiber with a hydrophobizing agent.

  The hydrophobic fiber contained in the second fiber layer has a fineness of 1.2 dtex or more, preferably 1.2 dtex or more and 3.5 dtex or less, more preferably 1.2 dtex or more and 2.6 dtex or less, Even more preferably, it has a fineness of 1.3 dtex or more and 2.0 dtex or less, particularly preferably 1.4 dtex or more and 1.8 dtex or less. If the fineness is less than 1.2 dtex, the entanglement between the fibers becomes dense and the specific volume of the second fiber layer tends to be small. In addition, a fiber layer in which fibers having a small fineness are entangled tends to decrease in bulk (specific volume) when stored in a state where force is applied in the thickness direction or impregnated with a liquid. is there. Therefore, when the fineness of the hydrophobic fiber contained in the second fiber layer is too small, the desired liquid transferability may not be realized in the sheet. When the fineness of the hydrophobic fiber is too large, the sheet tends to have a hard touch. In addition, when hydrophobic fibers with too small fineness are used and the fibers are entangled by the fluid flow entanglement method, the fluid flow is difficult to pass through the fiber web, and the fibers may not be entangled uniformly. is there. In that case, fluff may easily occur in the nonwoven fabric.

  The second fiber layer includes two or more different fibers as hydrophobic fibers. Two or more kinds of different hydrophobic fibers are a combination of two or more kinds of hydrophobic fibers having different degrees of hydrophobicity, or a combination of two or more kinds of synthetic fibers having different melting points of the thermoplastic resin constituting the fiber surface. It is.

  The degree of hydrophobicity can be evaluated by, for example, the official moisture content described in relation to the hydrophilic fiber, or can be evaluated by the contact angle with water. The contact angle with water is determined by dropping water droplets (ion-exchanged water) on a non-woven fabric consisting only of fibers to be evaluated, taking a photo of the water droplet within 10 seconds after the water droplet touches the sample, It is calculated | required by measuring the interface angle with a nonwoven fabric. The greater the angle, the stronger the hydrophobicity of the fiber. By making the fibers having stronger hydrophobicity and fibers having weaker hydrophobicity present in the second fiber layer, it is possible to impart good texture and soft touch to the nonwoven fabric while realizing good liquid migration. In particular, when two types of fibers having different hydrophobicities are used in combination, a sheet with less fuzz can be obtained when the sheet is produced by a fluid flow (particularly water flow) entanglement method. Therefore, the second fiber layer including two or more kinds of fibers having different degrees of hydrophobicity is preferably one in which the fibers are entangled by a fluid flow (particularly water flow) entanglement method.

  By combining two or more kinds of synthetic fibers having different melting points of the thermoplastic resin constituting the fiber surface, the fiber having the fiber surface constituted of a thermoplastic resin having a low melting point is used as the thermo-adhesive fiber, and the second fiber The layer can be configured such that the fibers are thermally bonded. Thereby, a 2nd fiber layer can be made bulky and favorable liquid migration property is realizable. Further, a sheet with less fuzz can be obtained by thermal bonding. Melting | fusing point is melting | fusing point of resin after making it into a fiber, and calculates | requires from the DSC curve measured according to JISK7121 (1987).

  For example, polyolefin fiber / polyester fiber, polyolefin fiber / regenerated fiber subjected to hydrophobization treatment, polyolefin fiber / acrylic fiber, polyester fiber / hydrophobization treatment can be used. Recycled fiber, polyester fiber / acrylic fiber, more specifically, polypropylene fiber / polyethylene terephthalate fiber, polypropylene fiber / regenerated fiber subjected to hydrophobic treatment, polyethylene terephthalate fiber / hydrophobic treatment Recycled fiber. In particular, the combination of polypropylene fiber / polyethylene terephthalate fiber is preferably used because it can impart good liquid migration to the sheet and improve the texture of the sheet.

  The hydrophobicity of the fiber is determined by the material (eg, thermoplastic resin or hydrophobizing agent) present on the fiber surface. Therefore, as long as two or more types of hydrophobic fibers have a difference in the hydrophobicity of the fiber surface and the above fineness is obtained after forming the sheet, the hydrophobic fiber is not limited to a single fiber, and the surface and the interior May be a composite fiber made of a different material, for example, a core-sheath type composite fiber and a sea-island type composite fiber. Alternatively, the hydrophobic fiber may be a fiber whose fiber surface is constituted by a plurality of substances, for example, a split type composite fiber. In that case, when the hydrophobicity of the entire fiber is compared, as long as two or more types of hydrophobic fibers having a difference in hydrophobicity are used, for example, a part of the surface of the stronger hydrophobic fiber is hydrophobic. It may be composed of a component that is less hydrophobic than the component that constitutes part of the surface of the weaker fiber.

  Synthetic fiber combinations (low-melting fiber / high-melting fiber combination) having different melting points of the thermoplastic resin constituting the fiber surface are, for example, polyethylene fiber / polypropylene fiber, core-sheath composite fiber / polypropylene having polyethylene as a sheath component. These are core-sheath type composite fiber / polyethylene terephthalate fiber, polyethylene fiber / polyethylene terephthalate fiber, and polypropylene fiber / polyethylene terephthalate fiber having a fiber and polyethylene as a sheath component. In particular, the core-sheath composite fiber / polypropylene fiber combination with polyethylene as the sheath component imparts good liquid migration to the sheet because the fiber surface is composed of a highly hydrophobic thermoplastic resin. Can be preferred. The synthetic fiber may be, for example, a core-sheath type composite fiber or a sea-island type composite fiber as long as the thermoplastic resin constituting the fiber surface has a different melting point and has the fineness after the sheet is formed. In addition, the low melting point fiber has a lower melting point of the thermoplastic resin constituting a part of the surface thereof than the melting point of the thermoplastic resin constituting the fiber surface of the other synthetic fiber, and the above fineness after forming the sheet. As long as it has, it is not limited to a single fiber, and may be a side-by-side type composite fiber or a split type composite fiber.

  The mixing ratio of two or more types of hydrophobic fibers is not particularly limited, and is appropriately determined in consideration of the hydrophobicity and the like according to the type of fiber used. For example, when two kinds of fibers having different degrees of hydrophobicity are combined, fibers having a low degree of hydrophobicity and fibers having a higher degree of hydrophobicity are preferably in a mass ratio, for example, preferably 10:90 to 90:10. , More preferably 20:80 to 80:20, still more preferably 25:75 to 75:25, and most preferably 30:70 to 70:30 (both hydrophobic weak: strong hydrophobic) . When three or more kinds of fibers having different degrees of hydrophobicity are used, the hydrophobic fiber having the largest degree of hydrophobicity is preferably 10% by mass to 90% by mass, more preferably 10% by mass to 90% by mass, based on the total mass of the hydrophobic fibers. Occupies 20% to 80%, more preferably 25% to 75%, most preferably 30% to 70% by weight. If the ratio of fibers having a higher degree of hydrophobicity is small, sufficient liquid transferability may not be obtained. If the ratio of fibers having a higher degree of hydrophobicity is large, fibers are entangled by hydroentanglement treatment. In some cases, the sheet tends to fluff.

  When combining two types of synthetic fibers having different melting points of the thermoplastic resin constituting the fiber surface, the low melting point fiber and the high melting point fiber are, for example, in a mass ratio of 3:97 to 70:30, more preferably 5:95. -50: 50, more preferably 10: 90-40: 60, most preferably 15: 85-30: 70 (all low melting point: high melting point) may be mixed. Alternatively, when three or more types of synthetic fibers having different melting points of the thermoplastic resin constituting the fiber surface are used, the lowest melting point of the thermoplastic resin constituting the fiber surface is preferably the total mass of the hydrophobic fibers combined. Occupies 3 mass% to 70 mass%, more preferably 5 mass% to 50 mass%, even more preferably 10 mass% to 40 mass%, and most preferably 15 mass% to 30 mass%. When the proportion of the low-melting fiber is large, the feel of the sheet becomes hard when thermally bonded. When the proportion of the low-melting fiber is small, when the force is applied in the thickness direction, the bulk of the second fiber layer is increased. It tends to decrease, and sufficient liquid transferability may not be obtained, or fluffing is likely to occur in the sheet.

  The fiber length of the fibers constituting the second fiber layer is appropriately selected according to the form of the second fiber layer. For example, when the second fiber layer is produced as a card web, the fiber length of the constituent fibers is preferably 25 mm or more and 100 mm or less, more preferably 30 mm or more and 70 mm or less, and 35 mm or more and 60 mm or less. Most preferred. When the first fiber layer is produced as an air laid web, the fiber length of the constituent fibers is preferably 1 mm or more and 50 mm or less, and more preferably 5 mm or more and 30 mm or less. When the first fiber layer is produced as a wet papermaking web, the fiber length of the constituent fibers is preferably 0.5 mm or more and 20 mm or less, and more preferably 1 mm or more and 10 mm or less.

The basis weight of the second fiber layer is appropriately selected according to the basis weight of the nonwoven fabric to be finally obtained. Basis weight of the second fibrous layer is preferably ^{5g / m 2 ~40g / m 2} , more preferably from ^{10g / m 2 ~30g / m 2} , most preferably 15g / m ² ~25g / m ² is there. The ratio of the basis weight of the first fiber layer to the basis weight of the second fiber layer is as described in relation to the first fiber layer, and is omitted here.

  The second fiber layer may be composed of only one layer (single layer structure) or may have a laminated structure in which two or more layers are laminated. For example, the second fiber layer includes a layer a containing two or more types of hydrophobic fibers having different degrees of hydrophobicity and a layer b containing two or more types of synthetic fibers having different melting points of the thermoplastic resin constituting the fiber surface. And may have a two-layer structure in which the fibers are thermally bonded in the layer b. Alternatively, the second fiber layer includes four types of fibers (referred to as fibers A, B, C, and D for convenience) having different degrees of hydrophobicity, a fiber layer including the fibers A and B, and a fiber C. And a fiber layer containing fibers D may be laminated.

(Other fiber layers)
The nonwoven fabric of the present invention may be composed only of the first fiber layer and the second fiber layer, but between the first fiber layer and the second fiber layer, a fiber layer composed of other fibers (hereinafter referred to as “other fiber layer”). May also be referred to as a “fiber layer”. Another fiber layer is a layer which consists of a hydrophobic fiber with a small fineness whose fineness is less than 1.2 dtex, for example. The basis weight of the other fibrous layers, preferably ^{5g / m 2 ~30g / m 2} , more preferably from ^{10g / m 2 ~25g / m 2} , most preferably 15g / m ² ~20g / m ² is there. The ratio of the basis weight of the first fiber layer to the basis weight of the other fiber layers is preferably 0.7 to 16, more preferably 1.0 to 6.0, and most preferably 1.2 to 4.0. .

(Configuration of entire nonwoven fabric and method for producing nonwoven fabric)
The first fiber layer and the second fiber layer described above are integrated by entanglement of fibers, thermal bonding using thermal adhesiveness of constituent fibers, bonding with a solvent-based adhesive, bonding with a hot melt resin, or the like. To constitute a non-woven fabric. The nonwoven fabric of the present invention is preferably integrated by entanglement between fibers. The fibers may be entangled by a known method, for example, by a needle punch method or a fluid flow entanglement method in which a high-pressure fluid (particularly water) is jetted onto the fiber web. In the nonwoven fabric of the present invention, it is preferable that fibers are entangled and integrated by a hydroentanglement method. This is because according to the hydroentanglement method, a soft nonwoven fabric having a good tactile sensation can be obtained.

  When the second fiber layer includes two or more types of synthetic fibers having different melting points of the thermoplastic resin constituting the fiber surface, the fibers are heated by the synthetic fiber having the lowest melting point of the thermoplastic resin constituting the fiber surface. It is preferable that they are adhered. By thermal bonding between fibers, fluffing can be suppressed in the obtained nonwoven fabric, the appearance of the nonwoven fabric can be improved, and the tactile feel of the nonwoven fabric can be made smooth.

The basis weight of the whole nonwoven fabric is appropriately selected in consideration of the amount of liquid impregnation and the like according to the skin site to be coated. The overall nonwoven basis weight, for example, well as ^{25g / m 2 ~120g / m 2} , particularly well as ^{35g / m 2 ~90g / m 2} , and more particularly well as ^{40g / m 2 ~75g / m 2} , more in particular it may be a ^{50g / m 2 ~70g / m 2} . If the basis weight is too small, the amount of liquid that can be impregnated into the nonwoven fabric decreases, and a predetermined amount of liquid may not be supplied to the skin. If the basis weight is too large, it is difficult to fit the sheet on the curved surface of the skin. Skin adhesion may be reduced.

The nonwoven, sheet covering the face, i.e., when it is used as a base material of the face mask, the overall nonwoven basis weight is preferably ^{25g / m 2 ~120g / m 2} , more preferably 35g / m ² ~90g / m ^2, even more preferably from 40 g / m ² ～75G / m ^2, particularly preferably from ^{50g / m 2 ~70g / m 2} . When the basis weight of the nonwoven fabric is less than 25 g / m ² when used as a face mask substrate, the amount of liquid that can be impregnated into the nonwoven fabric is reduced, and sufficient liquid may not be supplied to the face. When the basis weight of the nonwoven fabric exceeds 120 g / m ² , it may be difficult to adhere the sheet along the unevenness of the face (for example, around the nose).

The thickness of the whole nonwoven fabric is preferably 0.80 mm or more, more preferably 0.83 mm or more, and most preferably 0.85 mm or more. The thickness of the whole nonwoven fabric is preferably 1.5 mm or less, more preferably 1.2 mm or less, and most preferably 1.0 mm or less. If the thickness of the entire nonwoven fabric is too small, the amount of liquid that can be impregnated into the nonwoven fabric decreases, and a predetermined amount of liquid may not be supplied to the skin. When the thickness of the whole nonwoven fabric is too large, it is difficult for the sheet to follow the curved surface of the skin, and the adhesion of the sheet to the skin may be reduced. In addition, the thickness of the whole nonwoven fabric said here points out what was measured in the state which added the load of 3g per 1 cm < ² > of nonwoven fabric.

The density of the whole nonwoven fabric is preferably 0.070 g / cm ³ or less, more preferably 0.067 g / cm ³ or less. Further, the density of the whole nonwoven fabric is preferably 0.050 g / cm ³ or more, more preferably 0.060 g / cm ³ or more. If the density of the whole nonwoven fabric is too large or too small, the amount of liquid that can be impregnated into the nonwoven fabric decreases, and a predetermined amount of liquid may not be supplied to the skin, or the sheet is difficult to follow the curved surface of the skin. The adhesion of the sheet to the skin may be reduced. In addition, the density of the whole nonwoven fabric said here is calculated | required from the fabric weight of the whole nonwoven fabric, and the thickness of the whole nonwoven fabric, and the thickness of the whole nonwoven fabric was measured in the state which applied the load of 3g per 1 cm < ² > of nonwoven fabric. Point to.

  The nonwoven fabric is formed by laminating a fiber web to be a first fiber layer (hereinafter also referred to as “first fiber web”) and a fiber web to be a second fiber layer (hereinafter also referred to as “second fiber web”), The process which arrange | positions the fiber web used as another fiber layer (henceforth "other fiber web") between a 1st fiber web and a 2nd fiber web as needed, and integrates a fiber web. It can manufacture by attaching to. Examples of the process for integrating the fiber web include an intertangling process between fibers, a thermal bonding process, an adhesive process using a solvent-based adhesive, and an adhesive process using a hot melt resin. The nonwoven fabric of the present invention is preferably produced by integrating fiber webs by a process of entanglement of fibers. The process of entanglement of fibers is, for example, a needle punch process or a fluid flow (particularly water flow) entanglement process.

  Any fiber web may have any form selected from a parallel web, a cross web, a card web such as a semi-random web and a random web, an air lay web, a wet papermaking web, and a spunbond web. . The form of each fiber web may be the same or different. Each fibrous web is preferably a parallel web. Parallel webs are highly productive and tend to give a nonwoven fabric that is bulky and has a large specific volume. Moreover, since a soft nonwoven fabric is easily obtained when a parallel web is used, a liquid-impregnated skin-covering sheet produced using the parallel web is also soft and tends to have an excellent texture.

  When the fibers are entangled by the hydroentanglement process, the hydroentanglement process is performed by placing a fibrous web laminate on a support and jetting a columnar water stream. For example, the support is preferably a plain weave support of 80 mesh or more and 100 mesh or less. Hydroentanglement treatment is performed by laminating fiber webs with a water flow of 1 MPa or more and 15 MPa or less from a nozzle provided with orifices having a hole diameter of 0.05 mm or more and 0.5 mm or less at intervals of 0.3 mm or more and 1.5 mm or less. You may carry out by injecting 1 to 5 times each on the front and back of the body. The water pressure is preferably 1 MPa or more and 10 MPa or less, more preferably 1 MPa or more and 7 MPa or less.

  The fiber web after the entanglement treatment may be subjected to a drying treatment for removing moisture and used as it is as a base material for the sheet. When the second fiber layer includes two or more kinds of synthetic fibers having different melting points of the thermoplastic resin constituting the fiber surface, the fibers are heated by the synthetic fiber having the lowest melting point of the thermoplastic resin constituting the fiber surface. It is preferable to apply a heat bonding treatment for bonding. The thermal bonding treatment is preferably carried out at a temperature at which the thermoplastic resin constituting the surface of the synthetic fiber has the lowest melting point (hereinafter also referred to as “low melting point component”) is melted or softened. When the entanglement process is a hydroentanglement process, the thermal bonding process may also serve as a drying process for removing moisture from the fiber web. Alternatively, the thermal bonding process and the drying process may be performed separately.

  In the thermal bonding process, when the fiber component other than the low melting point component melts, the adhesion point increases or a large adhesion point is formed, and the flexibility of the nonwoven fabric is impaired, so the temperature is set so that only the low melting point component melts. select. For example, when the second fiber layer includes a synthetic fiber having a fiber surface made of polyethylene and the fiber surface of another synthetic fiber is made of a thermoplastic resin having a higher melting point than polyethylene, It is preferable to carry out at a temperature of 130 ° C or higher and 150 ° C or lower. By adjusting the heat treatment temperature, the degree of thermal adhesion by the low melting point component can be changed. The degree of thermal bonding affects the strength, flexibility, and touch of the nonwoven fabric.

  The thermal bonding treatment may be performed by a known method. Specifically, a hot air penetration type heat treatment machine (also called an air through type heat processing machine), a hot air blowing type heat treatment machine, an infrared heat treatment machine, or a hot roll (heat (Including embossing rolls). Of these, heat treatment using a hot air through heat treatment machine, a hot air blowing heat treatment machine, and an infrared heat treatment machine is preferable because it is difficult to reduce the bulk of the nonwoven fabric.

(Liquid-impregnated skin coating sheet)
The nonwoven fabric of this invention comprises a liquid impregnation skin coating sheet by impregnating this with the liquid. The liquid to be impregnated and the amount of impregnation are appropriately selected according to the application. When the sheet is provided as an interpersonal liquid-impregnated skin-covering sheet such as an interpersonal face mask, a keratin care sheet and a decollete sheet, a liquid containing an active ingredient (for example, a cosmetic) is 600 parts by mass with respect to 100 parts by mass of the nonwoven fabric. Impregnation may be carried out with an impregnation amount of not less than 2500 parts by mass and more preferably not less than 600 parts by mass and not more than 1500 parts by mass, more particularly impregnation with an impregnation amount of not less than 700 parts by mass and not more than 1500 parts by mass. It's okay. Examples of the active ingredient include, but are not limited to, a moisturizing ingredient, a keratin softening ingredient, a cleansing ingredient, an antiperspirant ingredient, an aroma ingredient, a whitening ingredient, a blood circulation promoting ingredient, an ultraviolet ray preventing ingredient, and a slimming ingredient. .

  The face mask has a shape suitable for covering the face, and further, for example, in a form in which openings or notches by punching are provided as necessary in portions corresponding to eyes, nose and mouth. Provided. Alternatively, the face mask may have 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.

  A keratin care sheet is a skin-covering sheet used for heels, elbows, knees, etc., which are thick and easily cured, and impregnated with a liquid containing keratin softening and moisturizing ingredients to moisturize and soften the keratin. It is a sheet that promotes the removal of excess keratin and the sheet that promotes the removal of excess keratin. The nonwoven fabric of the present invention can be used as a base material in any keratin care sheet that exhibits any effect or effect. A keratin care sheet, for example, a keratin care sheet for wrinkles, has an opening formed by cutting and / or notching and / or part of the sheet so that the sheet can be easily fitted to the wrinkle curve. Is provided in a form having

  A liquid-impregnated skin-covering sheet is a moisturizing ingredient or used to moisturize or otherwise care for any part of the body (eg neck, back of hand, neck-to-chest part (also called decollete)) It may be a moisturizing sheet impregnated with a liquid containing other effects. Alternatively, the liquid-impregnated skin coating sheet may be a slimming sheet impregnated with a liquid containing a slimming component. The slimming sheet is used by being attached to the thigh or the abdomen, for example.

  In any form of the sheet, the first fiber layer is used in contact with the skin. Therefore, the second fiber layer is not in contact with the skin and is exposed to the external environment. Since the second fiber layer is hydrophobic, the liquid is more likely to move from the second fiber layer to the hydrophilic first fiber layer rather than evaporating to the external environment, and the liquid that has moved to the first fiber layer is Furthermore, it will move to the skin. Moreover, the liquid which moved to the 1st fiber layer becomes a film | membrane form on the skin surface, and plays the role which adhere | attaches a sheet | seat on skin favorably.

Hydrophilic fiber 1 (indicated as “Cotton” in the table): Cotton having a fineness of 1.0 to 5.0 dtex, fiber length of 10 to 60 mm Hydrophobic fiber 1 (indicated in the table as “PP single”): Fineness of 1.5 dtex A single fiber made of polypropylene with a fiber length of 51 mm (melting point: 163 ° C., trade name: PN804, manufactured by Daiwabo Polytech Co., Ltd.)
Hydrophobic fiber 2 (shown as “PET single” in the table): Single fiber made of polyethylene terephthalate with a fineness of 1.45 dtex and a fiber length of 38 mm (melting point 260 ° C., trade name T402, manufactured by Toray Industries, Inc.)
Hydrophobic fiber 3 (shown as “PP / PE fine” in the table): Fineness 1.7 dtex, fiber length 51 mm, polypropylene (melting point 167 ° C.) is a core component, polyethylene (melting point 138 ° C.) is a sheath component, Core-sheath type composite fiber (trade name HR-NTW, manufactured by Toray Industries, Inc.)
Hydrophobic fiber 4 (shown as “divided” in the table): Divided composite fiber with 8 sections, having a fineness of 2.2 dtex, a fiber length of 51 mm, and polyethylene and polyethylene terephthalate arranged alternately in chrysanthemum on the fiber cross section (Product name DFS (SH), Daiwabo Polytech Co., Ltd.)
Hydrophobic fiber 5 (shown as “special tencel” in the table): Tencel having a fineness of 1.7 dtex, a fiber length of 38 mm, and a fiber surface subjected to hydrophobic treatment (trade name Tencel Biosoft, manufactured by Renzing)
Hydrophobic fiber 6 (shown as “PP / PE thick” in the table): Fineness 2.2 dtex, fiber length 51 mm, polypropylene (melting point 167 ° C.) is the core component, polyethylene (melting point 138 ° C.) is the sheath component, Core-sheath type composite fiber (trade name NBF (H), manufactured by Daiwabo Polytech Co., Ltd.)

(Test 1)
(Examples 1-2, Comparative Examples 1-4)
The first fiber web with the target weight shown in Table 1 is prepared with only hydrophilic fibers 1 (cotton), and the types of hydrophobic fibers shown in Table 1 are mixed in the ratio shown in Table 1, A second fiber web with the intended basis weight shown was made. Both the first fiber web and the second fiber web were produced using a parallel card machine. Note that the basis weight of the actually manufactured web does not always match the target basis weight and has an error (the same applies to the following tests).

  Supports a laminated web having a two-layer structure in which a first fiber web and a second fiber web are laminated, a three-layer structure web of the first fiber web / second fiber web / first fiber web, or only the first fiber web It was placed on the body and the web was hydroentangled to entangle the fibers. In the hydroentanglement treatment, a columnar water flow of 3.0 MPa is jetted twice on one surface of a web using a nozzle having an orifice having a hole diameter of 0.1 mm provided at intervals of 0.6 mm, and 4.0 MPa is applied to the other surface. A columnar water stream was jetted twice. Then, the drying process was performed and the nonwoven fabric was obtained.

Table 1 shows the basis weight, thickness, and density of the obtained nonwoven fabric. The thickness was measured using a thickness measuring machine (trade name: THICKNESS GAUGE model CR-60A, manufactured by Daiei Kagaku Seisakusho Co., Ltd.) with a load of 3 g and a load of 20 g each applied to 1 cm ^{2 of} the sample. The density was calculated and calculated from the basis weight and the thickness measured by applying a load of 3 g per 1 cm ² .

(Evaluation of liquid transferability)
A sample obtained by cutting the obtained non-woven fabric so as to have dimensions of 150 mm in the vertical direction (machine direction) and 70 mm in the horizontal direction (width direction) was prepared, and 100 parts by mass of the sample was impregnated with 700 parts by mass of water. . The sample impregnated with water was placed on a Kim towel (trade name) whose mass was measured in advance. The sample was placed on the Kim towel so that the first fiber layer (the first fiber layer having a larger basis weight for the sample where the first fiber layer is located on both sides) was in contact with the Kim towel. The sample was left on the Kim Towel for 30 minutes and the mass of the Kim Towel after being left was measured. The increase in the mass of the Kim Towel after 30 minutes is taken as the amount of water transferred from the sample to the Kim Towel, and the ratio of the amount of transferred water to the mass of the impregnated liquid is determined as a percentage. evaluated.
In Test 1, the liquid transferability was evaluated under the conditions of a temperature of 23.3 ° C. and a humidity of 72%.
Table 1 shows the evaluation results of liquid transferability.

  Examples 1 and 2 both showed good liquid transfer properties, and the touch and appearance were also good. Non-woven fabric (Comparative Example 1) consisting only of hydrophilic fibers, and a non-woven fabric having a three-layer structure of first fiber layer / second fiber layer / first fiber layer, in which the hydrophilic first fiber layer is located in the external environment (Comparative Examples 2 and 3) all had low liquid transferability. In Comparative Examples 2 and 3, the liquid retained in the second fiber layer moves not only to the first fiber layer on the lower side but also to the first fiber layer located on the upper side (external environment), and the liquid is transferred accordingly. It is inferred that the sex has declined. As for Comparative Example 4, the liquid transferability was good, but the appearance was poor due to a lot of fuzz. This is presumably because the degree of entanglement between the fibers due to the water flow was reduced because the second fiber layer was composed of only the relatively strong hydrophobic polypropylene fibers.

(Test 2)
(Example 3, Comparative Examples 5-7)
The first fiber web with the target weight shown in Table 2 is prepared with only hydrophilic fibers 1 (cotton), and the types of hydrophobic fibers shown in Table 2 are mixed in the proportions shown in Table 2. A second fiber web with the intended basis weight shown was made. Both the first fiber web and the second fiber web were produced using a parallel card machine.

  A laminated web having a two-layer structure in which the first fiber web and the second fiber web were laminated, or only the first fiber web, was placed on the support, and the web was subjected to hydroentanglement treatment to entangle the fibers. In the hydroentanglement treatment, a columnar water flow of 3.0 MPa is jetted twice on one surface of a web using a nozzle having an orifice having a hole diameter of 0.1 mm provided at intervals of 0.6 mm, and 4.0 MPa is applied to the other surface. A columnar water stream was jetted twice. Then, the drying process was performed and the nonwoven fabric was obtained.

The basis weight and thickness of the nonwoven fabric obtained in Example 3 and Comparative Examples 5 to 7 were measured. The measurement method is as described above. The measurement results are shown in Table 2.
Moreover, the liquid transferability of the nonwoven fabric obtained in Example 3 and Comparative Examples 5 to 7 was evaluated by the same method as described in connection with Test 1. However, the evaluation was performed under conditions of a temperature of 17 ° C. and a humidity of 60%. Table 2 shows the evaluation results of liquid transferability. It should be noted that the evaluation of the liquid transferability in Test 2 was performed in an environment different from that in Test 1, and thus the value shown as the evaluation result is different from that in Test 1.

  Example 3 showed good liquid transferability, and the touch and appearance were also good. Comparative Example 6 was inferior in terms of liquid transferability. This is because the second fiber layer contains ultrafine fibers formed by dividing the split type composite fiber, the specific volume of the second fiber layer is small, the amount of water held by the second fiber layer is small, It is guessed that the force which pushes a 1st fiber layer was small. In addition, the nonwoven fabric of Comparative Example 6 had a small thickness when a load of 20 g was applied, and the bulk was likely to decrease when a force was applied in the thickness direction for a long time. This is also presumed to be due to the fact that the second fiber layer contains ultrafine fibers and the fibers are intertwined closely. In Comparative Example 5 consisting only of the hydrophilic fiber layer, even in Test 2, the liquid transferability was low.

  In Comparative Example 7, the second fiber layer was composed only of polyethylene terephthalate, and the liquid migration property was similar to that in Example 3. However, when the load of 20 g is applied, the thickness is small, the volume tends to decrease when a force is applied in the thickness direction, and the liquid transferability after storage for a long time with the force applied in the thickness direction Tended to decline. This is presumably because polyethylene terephthalate has slightly higher hydrophilicity, and the fibers are entangled more closely by the hydroentanglement process.

(Test 3)
(Examples 4 and 5, Comparative Examples 8 and 9)
The first fiber web having the target weight shown in Table 3 is prepared with only hydrophilic fibers 1 (cotton), and the types of hydrophobic fibers shown in Table 3 are mixed in the ratio shown in Table 3, A second fiber web with the intended basis weight shown was made. Both the first fiber web and the second fiber web were produced using a parallel card machine.

  A laminated web having a two-layer structure in which the first fiber web and the second fiber web were laminated, or only the first fiber web, was placed on the support, and the web was subjected to hydroentanglement treatment to entangle the fibers. In the hydroentanglement treatment, a columnar water flow of 3.0 MPa is jetted twice on one surface of a web using a nozzle having an orifice having a hole diameter of 0.1 mm provided at intervals of 0.6 mm, and 4.0 MPa is applied to the other surface. A columnar water stream was jetted twice. In Example 4 and Comparative Example 8, a drying treatment was then performed to obtain a nonwoven fabric. In Example 5 and Comparative Example 9, a non-woven fabric was obtained by heat-treating with a hot-air through-type heat treatment machine set at 140 ° C. and thermally bonding the fibers with the hydrophobic fibers 3 and the polyethylene of the hydrophobic fibers 6.

The basis weight and thickness of the nonwoven fabrics obtained in Examples 4 and 5 and Comparative Examples 8 and 9 were measured. The measurement method is as described above. Table 3 shows the measurement results.
Moreover, the liquid transferability of the nonwoven fabrics obtained in Examples 4 and 5 and Comparative Examples 8 and 9 was evaluated by the same method as described in connection with Test 1. However, the evaluation was performed under conditions of a temperature of 24 ° C. and a humidity of 52%. Table 3 shows the evaluation results of liquid transferability. It should be noted that the evaluation of the liquid transferability in Test 3 was performed in an environment different from that in Tests 1 and 2, and thus the values shown as the evaluation results are different from those in Tests 1 and 2.

  Examples 4 and 5 both showed good liquid transferability, and the touch and appearance were also good. In Comparative Example 8 consisting only of the hydrophilic fiber layer, the liquid transferability was also low in Test 3. In Comparative Example 9, the fibers constituting the surface that does not come into contact with the skin were all heat-bonded, so the texture was hard.

  The nonwoven fabric of the present invention is impregnated with a liquid, and when the first fiber layer is used in contact with the skin, the liquid is easily transferred to the skin, so that the liquid tends to stay on the skin, thereby ensuring good adhesion. In addition, since the action of the liquid on the skin can be satisfactorily exhibited, it is useful as a base material such as a face mask.

Claims (8)

A first fiber layer containing 50% by mass or more of hydrophilic fibers, and a second fiber layer containing 50% by mass or more of hydrophobic fibers that are more hydrophobic than the hydrophilic fibers contained in the first fiber layer. A nonwoven fabric in which the fiber layer forms one surface and the second fiber layer forms the other surface,
The hydrophobic fiber has a fineness of 1.2 dtex or more,
As the hydrophobic fiber, including two or more kinds of fibers having a difference in hydrophobicity,
A nonwoven fabric for liquid-impregnated skin-covering sheet, wherein the first fiber layer is used in contact with the skin.   The nonwoven fabric for liquid-impregnated skin-covering sheet according to claim 1, wherein the second fiber layer includes polyolefin fibers and polyester fibers as the hydrophobic fibers.   The nonwoven fabric for liquid-impregnated skin-covering sheet according to claim 2, wherein the polyolefin fiber is a single fiber made of polypropylene, and the polyester fiber is a single fiber made of polyethylene terephthalate. A first fiber layer containing 50% by mass or more of hydrophilic fibers, and a second fiber layer containing 50% by mass or more of hydrophobic fibers that are more hydrophobic than the hydrophilic fibers contained in the first fiber layer. A nonwoven fabric in which the fiber layer forms one surface and the second fiber layer forms the other surface,
The hydrophobic fiber has a fineness of 1.2 dtex or more,
As the hydrophobic fiber, including two or more kinds of synthetic fibers having different melting points of the thermoplastic resin constituting the fiber surface,
The fibers are thermally bonded to each other by a synthetic fiber having the lowest melting point of the thermoplastic resin constituting the fiber surface included in the second fiber layer,
A nonwoven fabric for liquid-impregnated skin-covering sheet, wherein the first fiber layer is used in contact with the skin.   5. The liquid-impregnated skin according to claim 4, wherein the second fiber layer includes a single fiber made of polypropylene as the hydrophobic fiber, and a core-sheath type composite fiber having polyethylene as a sheath component and polypropylene as a core component. Nonwoven fabric for coated sheets.   The nonwoven fabric for liquid-impregnated skin-covering sheets according to any one of claims 1 to 5, wherein the hydrophobic fibers have a fineness of 3.5 dtex or less.   A liquid-impregnated skin-coated sheet obtained by impregnating the nonwoven fabric according to any one of claims 1 to 6 with 600 to 2500 parts by mass of a liquid.   A face mask obtained by impregnating the nonwoven fabric according to any one of claims 1 to 6 with 600 parts by mass or more and 2500 parts by mass or less of a liquid.