JP2008261067A - Nonwoven fabric sheet, and hydrous sheet and cosmetic each including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nonwoven fabric sheet, soft and good in touch to the skin, having good impregnating tendency and liquid-holding tendency when impregnated with any of various fluid compositions, capable of efficiently releasing such a fluid composition by pressure or the like, and excellent in form stability with slight firmness decline or shrinkage due to impregnation with moisture, to provide a hydrous sheet including the nonwoven fabric sheet, good in touch to the skin and excellent in water-holding tendency, water (moisture) releasability and form stability, and to provide a cosmetic in touch to the skin, good in makeup ingredient releasability, excellent in form stability and easily and neatly applicable to the skin. <P>SOLUTION: The nonwoven fabric sheet is such that solvent-spun cellulosic fibers and sheath/core-type conjugate fibers are mutually entangled. In this nonwoven fabric sheet, the sheath/core-type conjugate fiber is composed of a sheath part and a core part, wherein the sheath part includes an ethylene-vinyl alcohol copolymer, and the core part is 5-15 μm in diameter. This nonwoven fabric sheet is 80-95% in porosity. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is an effective base for adsorbing and absorbing a fluid composition containing a cosmetic composition having functions such as wiping, wiping, moisturizing, and beauty of skin such as excrement, sebum, and cosmetics. The present invention relates to a nonwoven fabric sheet. Moreover, it is related with the water-containing sheet and cosmetics containing this nonwoven fabric sheet.

Conventionally, water-containing sheets such as wet tissues, disposable towels, and sheet-like cosmetics that coat the skin with water and aqueous fluid compositions integrated with non-woven fabric sheets have hydrophilic fibers such as rayon or hydrophilic fibers and heat. There have been proposed non-woven fabrics obtained by applying a high-pressure water flow treatment to a fiber web made of a mixture of adhesive conjugate fibers, or various non-woven fabrics obtained by functionally improving the non-woven fabric. However, when hydrophilic fibers such as rayon are wet, wrinkles occur due to fiber stiffness and fiber shrinkage, leading to a decrease in morphological stability that impairs workability and liquid retention. is there. In addition, there is a problem that moisture is taken into the fiber and the effect of moisture cannot be used effectively. In order to improve the above-mentioned problem, it contains 50% by mass or more of hydrophobic synthetic short fibers, and 40% by mass or more of hydrophilic short fibers on both surfaces of the thermobonding nonwoven fabric in which the constituent fibers are joined together by partial thermocompression bonding parts. There has been proposed a composite wet sheet in which fiber webs are laminated and entangled (for example, Patent Document 1).
However, the sheet prepared by fusing the heat-adhesive component is improved in shrinkage when wet, but the entire sheet becomes hard and the conformity to the skin is lowered. Further, since the surface of the sheet is mainly composed of hydrophilic fibers, the chemical solution impregnated in the fibers is taken in and cannot be sufficiently released to the object to be wiped off. In addition, due to the spread of social needs, a function of incorporating various fluid compositions has been demanded.
JP 2001-336053 A

  In other words, the problem to be solved by the present invention is that it is soft and soft to the touch, has good impregnation and liquid retention when impregnated with various fluid compositions, and further efficiently applies the fluid composition by pressure or the like. An object of the present invention is to provide a nonwoven fabric sheet that can be released and is excellent in form stability of the nonwoven fabric sheet due to less deterioration and shrinkage due to water impregnation. Another object of the present invention is to provide a water-containing sheet that has a good touch and is excellent in water retention, release and form stability. Another object of the present invention is to provide a cosmetic that can be applied to the skin easily and cleanly because it has a good touch, good release of the cosmetic, and excellent form stability.

  We have intensively studied in view of the above problems and have arrived at the present invention.

  That is, the first invention is a nonwoven fabric sheet in which a solvent-spun cellulosic fiber having a fiber length of 30 to 60 mm and a core-sheath type composite fiber are entangled with each other, and the core-sheath type composite fiber has a sheath part. A nonwoven fabric sheet comprising a core portion, wherein the sheath portion is an ethylene-vinyl alcohol copolymer, and the core portion is formed of a hydrophobic resin and has a diameter of 5 μm to 15 μm.

  Moreover, 2nd invention is a nonwoven fabric sheet of 1st invention, Comprising: The surface of the said nonwoven fabric sheet has an unevenness | corrugation, It is a nonwoven fabric sheet characterized by the above-mentioned.

  A third invention is a nonwoven fabric sheet according to the first invention, characterized in that it contains 30-80% by mass of the core-sheath type conjugate fiber.

  Moreover, it is the water-containing sheet | seat with which any nonwoven fabric sheet and water which are provided by any one of 1-3 invention are integrated.

  Moreover, it is a cosmetic in which the non-woven sheet provided in any one of the first to third inventions and the fluid composition containing the cosmetic composition are integrated.

  By the means described above, the present invention can adsorb the fluid composition containing a cosmetic composition having functions such as wiping, wiping, moisturizing, and beauty of skin such as excrement, sebum, and cosmetics. The present invention provides a non-woven sheet serving as a substrate effective for absorption. Moreover, the water-containing sheet and cosmetics containing this nonwoven fabric sheet are provided.

  In the first invention, both the solvent-spun cellulosic fiber and the ethylene-vinyl alcohol copolymer (hereinafter sometimes referred to as EVOH) which is the sheath part of the core-sheath type composite fiber are not only hydrophilic but also two fibers. Since a nonwoven fabric sheet is formed by entanglement with each other, it is soft and soft to the touch. Further, both the solvent-spun cellulose fiber and the core-sheath type composite fiber are highly impregnated with the fluid composition, and can quickly impregnate the fluid composition such as water.

  Since the fiber length of the solvent-spun cellulose fiber and the core-sheath type composite fiber is 30 to 60 mm, it is possible to ensure the rigidity and appropriate flexibility and stretchability of the nonwoven fabric, and to realize a soft touch and a feeling of fitting to the skin. . Moreover, since it is suitable for manufacture by fiber entanglement under dry conditions, a bulky nonwoven fabric sheet excellent in impregnation with a fluid composition and excellent in cushioning properties can be obtained.

  In addition, the ethylene-vinyl alcohol copolymer has a hydrophobic portion, the ethylene content of the ethylene-vinyl alcohol copolymer constituting the nonwoven fabric sheet, the mixing ratio of the solvent-spun cellulose fiber and the core-sheath composite fiber, etc. It can be impregnated to impregnate various fluid compositions.

  Solvent-spun cellulosic fibers have high liquid retention properties of hydrophilic fluid compositions such as water, aqueous solutions, polar solvents, and emulsions thereof. On the other hand, the ethylene-vinyl alcohol copolymer has low liquid retention. For this reason, the fluid composition in the vicinity of the ethylene-vinyl alcohol copolymer exudes easily due to pressure or the like. Furthermore, since the ethylene-vinyl alcohol copolymer that has released the fluid composition has high impregnation property and further desorbs the fluid composition from the solvent-spun cellulosic fiber, the fluid composition can continuously permeate at an appropriate rate. put out. Since the nonwoven fabric sheet is entangled with the solvent-spun cellulosic fiber and the core-sheath type composite fiber, the fluid composition is rapidly moved. Since the discharge | release property of the fluid composition impregnated by these becomes high, a fluid composition can be used effectively.

  In addition, the core-sheath type composite fiber having a hydrophobic resin as a core part is less likely to be wrinkled due to less shrinkage due to water impregnation, so that the liquid retaining property and workability are not impaired. For example, in applications such as a cosmetic base material that is important to be closely adhered to the skin, the alongness to the skin becomes high.

  Moreover, since the diameter of the core part of a core-sheath-type composite fiber is 5 micrometers-15 micrometers, since the firmness of a core can be felt to skin at the time of use, it becomes a soft touch.

  In the second invention, since the surface of the nonwoven fabric sheet has irregularities, an air layer is formed between the nonwoven fabric sheet and the skin when it is in close contact with the skin. Further, since the surface area is increased, the adhesion with the skin is increased. In wet tissue, disposable towels, cosmetics, and other applications where the fluid composition is impregnated and released by pressure, the fluid composition is retained in the concave portion, so that the convex portion that is easy to touch the skin is good. Since the release of a fluid composition is obtained, the touch is even better. In addition, the concave portion enhances the fluid retaining effect of the fluid composition, and the fluid composition having a wide range of polarities can be retained without adjusting the overall polarity by the copolymerization ratio of the ethylene-vinyl alcohol copolymer.

  In the third invention, the nonwoven fabric sheet contains 70 to 20% by mass of solvent-spun cellulosic fiber and 30 to 80% by mass of the core-sheath type composite fiber, so that the touch is good and the fluid composition is impregnated. It has a good balance of impregnating properties, release properties, liquid retention properties of hydrophilic fluid compositions, and morphological stability due to the absence of fiber shrinkage and stiffness reduction during impregnation, and is even better. .

  The fourth invention is a water-containing sheet in which the nonwoven fabric sheet of the present invention and water are integrated, so that it is comfortable to touch, has excellent water retention, release, and form stability, wet tissue, disposable towel, It is suitable for uses such as a cosmetic impregnated with an aqueous cosmetic composition.

  The fifth invention is a cosmetic in which the nonwoven fabric sheet of the present invention and the fluid composition containing the cosmetic composition are integrated, so that the touch is good, the release of the cosmetic is good, and the form stability Because it is excellent, it can be easily and cleanly applied to the skin.

  The nonwoven fabric sheet of the present invention is a sheet in which a solvent-spun cellulose fiber and a core-sheath type composite fiber are entangled with each other, and the above-mentioned uniformly mixed fibers are made into a nonwoven fabric by a hydroentanglement method. A bulky fiber entangled body is realized.

  As the sheath part of the core-sheath type composite fiber used in the present invention, it is composed of a resin having both hydrophilic and lipophilic properties in its molecular structure, so that the skin having both fat and water including sweat and dirt can be mixed. It is intended to obtain a non-woven fabric for cosmetics that has good adhesion and feel, and realizes a good interaction. And as this resin, it is preferable that it is an ethylene-vinyl alcohol copolymer, and the fiber which consists of this resin is known as a biocompatible fiber based on hydrophilic property, non-water-absorption property, and heat conductivity.

  EVOH used for the sheath part of the core-sheath type composite fiber of the present invention is preferably obtained by saponifying an ethylene-vinyl ester copolymer. The EVOH component preferably has an ethylene content of 25 to 70 mol%. In view of hydrophilicity and melt spinnability, those having an ethylene content of 30 to 65 mol% are particularly preferred. Further, from the viewpoint of maintaining hydrophilicity while suppressing troubles on melt spinning due to deterioration of the staying resin, those having an ethylene content of 35 to 60 mol% are preferable, and more preferably 37 to 55 mol. %, And most preferably 40-50 mol%. When ethylene content exceeds 70 mol%, since the hydrophilic property of the fiber obtained is insufficient, it is not preferable. Also, when the ethylene content is less than 5 mol%, melt spinnability is lowered, and when used in a wet state as in the present invention, the form stability is insufficient, which is not preferable.

Moreover, when EVOH in the present invention is obtained by saponification of an ethylene-vinyl ester copolymer, the saponification degree of the vinyl ester component is preferably 80 mol% or more, and from the viewpoint of hydrophilicity and melt spinnability, More preferably, it is 90 mol% or more, More preferably, it is 95 mol% or more. This is because when the degree of saponification is less than 80 mol%, the hydrophilicity, thermal stability, and heat resistance may be deteriorated.
Furthermore, since EVOH is particularly unstable with respect to hot water, there is a case where a method of acetalizing EVOH to increase hot water resistance is usually used after fiberization. Furthermore, for applications that require compatibility with the skin, fibers that have not been acetalized or the like are preferable.

  Examples of the vinyl ester copolymerized with ethylene include vinyl acetate, and other fatty acid vinyls (such as vinyl propionate and vinyl pivalate) can be used in combination. Moreover, EVOH can contain 0.0002-0.2 mol% of vinyl silane compounds as a copolymerization component. Here, examples of the vinylsilane compound include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltri (β-methoxy-ethoxy) silane, γ-methacryloxypropylmethoxysilane, and the like. Of these, vinyltrimethoxysilane and vinyltriethoxysilane are preferably used.

  As described above, EVOH has good adhesion to the skin and feel, and can be provided with a nonwoven fabric sheet having excellent liquid absorbency and retention of cosmetics by constituting from fibers using this resin. When the nonwoven fabric of the present invention is composed of EVOH single fibers, the rigidity is lowered and softened by water absorption, so that water absorption and the external force applied at that time are used in the process of manufacturing, processing, packaging, and the use thereof. It is difficult to maintain the space between the fibers due to the influence, and as a result, it becomes difficult to ensure excellent liquid retention and workability. Therefore, in the present invention, EVOH resin is arranged on the outer periphery of the fiber and the core portion has high rigidity so that the desired bulkiness, that is, porosity can be maintained and water absorption can be secured even in these processing steps. By arranging resin and core-sheath type composite fibers, not only can the porosity be maintained even under the influence of external forces, but the non-woven sheet should be maintained firm even in wet conditions, and the feel when restrained by the skin should be maintained. Is possible.

  Therefore, in the core-sheath type composite fiber of the present invention, the core part combined with EVOH which is the sheath part is not limited as long as it is a resin having at least hydrophobicity used for a normal core-sheath type composite fiber, but this is not particularly limited. Since the resin is hydrophobic, the core portion does not absorb water even when the sheath portion absorbs water. For this reason, there are resins that do not change in rigidity, that is, polyester resins, polyolefin resins, polyamide resins, and the like. Considering maintaining the porosity of the nonwoven fabric sheet, it is optimal to use a polyester-based resin that hardly changes its shape even at higher temperatures.

  In order to ensure a high porosity with a nonwoven fabric sheet, it is preferable that the fibers constituting the nonwoven fabric sheet have high bending elasticity. In particular, even in the case where the web is in a liquid-absorbed state during these steps, it is preferable that the constituent fibers are made of a highly elastic resin in order to ensure high fiber elasticity. The higher the elastic modulus is, the higher the porosity can be when the nonwoven fabric sheet is formed, so that the liquid retention can be maintained and the workability becomes suitable. Resins with a higher modulus of elasticity than EVOH and excellent spinnability with EVOH include polypropylene and polyester resins, but they have a higher modulus of elasticity and can suppress shrinkage of the nonwoven fabric sheet, resulting in better workability. Polyester resin is most suitable.

  Examples of polyester resins include terephthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, phthalic acid, α, β- (4-carboxyphenoxy) ethane, 4,4′-dicarboxydiphenyl, and 5-sodium sulfoisophthalate. Aromatic dicarboxylic acids such as acids or their esters, ethylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, cyclohexane-1,4-dimethanol, polyethylene glycol, polytetra Examples include polyesters synthesized from diols such as methylene glycol or ester-forming derivatives thereof, and polyesters such as polylactic acid. Among them, 80% or more of the structural units are ethylene terephthalate units or butylene terephthalate. Polyester resin is a bit basis are preferred.

  Furthermore, since the core portion can maintain the porosity of the nonwoven fabric sheet, the liquid retention amount is high, and it can be expected that the nonwoven fabric is stiff and the workability when wet is improved, the diameter is 5 μm to 15 μm. It is preferable. More preferably, it is 8-12 micrometers. If the diameter of the polyester at the core is 5 μm or less, the stiffness of the fiber is lowered, resulting in an increase in the density of the nonwoven fabric and a decrease in the amount of impregnation with the chemical solution, which is not preferable. Furthermore, the stiffness of the non-woven fabric is also reduced, and the spreadability and the wearability in the state of being impregnated with a chemical solution are deteriorated. In addition, since the stiffness of the fiber becomes too strong when the diameter is 15 μm or more, the conformity to the face is reduced particularly in the cosmetic used by impregnating the fluid composition including the cosmetic composition used by covering the face. To do. Furthermore, since the density of the nonwoven fabric decreases due to the strong stiffness of the fibers, the fiber sensing distance in the nonwoven fabric becomes too long, and the cosmetic composition cannot be held between the fibers, and the liquid is unnecessarily discharged, which is not preferable.

The resin composition ratio in the core portion and the sheath portion of such a core-sheath type composite fiber is such that the mass ratio of the sheath portion and the core portion made of polyester is 90/10 to 10/90, and the sheath portion is approximately the fiber surface area. It is necessary to occupy an area of 50% or more in the length direction almost continuously. This is because the sheath part is involved in all of the water absorption, oil absorption and discharge properties of the nonwoven fabric of the present invention, and the flexibility of the nonwoven fabric, so that it must always be present on the fiber surface.
On the other hand, if the sheath part exceeds 90% by mass, the core part cannot maintain the form of the fiber, and it may be difficult to ensure sufficient strength of the fiber itself. On the other hand, if the sheath is less than 10% by mass, the amount of resin is so small that the fiber form cannot be maintained, and the target performance may not be ensured.

  The production of the core-sheath type composite fiber used in the present invention is not particularly limited. For example, the resins constituting the sheath part and the core part are melt-kneaded by separate extruders, and the two resins are subsequently spun into the spinning head. And can be obtained by discharging from the same spinning nozzle.

  The core-sheath type composite fiber is usually used after being drawn. The drawing method may be a one-step method in which the fiber discharged from the nozzle during spinning is drawn by a godet roller, or may be drawn between hot godet rolls, or may be wound once and then hot drawn at low speed in a water bath or a hot air oven. A two-step method may be used.

  The above-described core-sheath type composite fiber is excellent in touch and hydrophilicity, but in the case of a nonwoven sheet made of 100% core-sheath type composite fiber, the impregnation property when impregnated with an aqueous fluid composition is excellent. Since the core-sheath type composite fiber itself has low water absorption, the liquid absorption rate is slow, and it is difficult to retain the retained aqueous fluid composition in the sheet space. Therefore, when a non-woven sheet made of 100% core-sheath type composite fiber is impregnated with an aqueous fluid composition, it takes time to absorb the liquid and the work efficiency is reduced, or some aqueous fluid composition The object is unnecessarily discharged from the inside of the sheet and flows down and is wasted.

  The present invention has solved this problem by using solvent-spun cellulosic fibers in combination, but by mixing 70 to 20% by mass of solvent-spun cellulosic fibers, desirably 60% to 20%, and more desirably 50 to 30%. It was confirmed that the liquid retention was improved while maintaining high liquid absorption and liquid retention.

  The solvent-spun cellulose fiber used in the present invention is a so-called regenerated cellulose fiber in which cellulose is once chemically converted into a cellulose derivative and then returned to cellulose, like conventional viscose rayon and copper ammonia rayon. In contrast, it means a fiber (purified cellulose fiber) obtained by precipitating cellulose from a solution obtained by simply dissolving it in a solvent without chemically changing the cellulose.

  A preferred example of the solvent-spun cellulose fiber used in the present invention is a method in which a spinning stock solution in which cellulose is dissolved in amine oxide is dry-wet-spun into water to precipitate the cellulose, and the resulting fiber is further drawn. Cellulosic fibers. A typical example of such a fiber is lyocell, which is sold under the trade name “Tencel” (registered trademark) by the Austrian Lenzing company. Such a fiber is very preferable because it has a round or oval cross-sectional shape unlike a regenerated cellulosic fiber used for general purposes, and therefore has a low risk of damaging the skin when used by other people. Furthermore, since the fiber strength of the viscose rayon fiber is reduced under wet conditions, the sheet obtained by mixing the fibers is deformed in a wet state impregnated with a chemical solution and the workability is reduced. For example, when it is used as a cosmetic comprising a fiber and a fluid composition containing the cosmetic composition as one body, the wearability is poor. On the other hand, since the nonwoven fabric sheet of the present invention hardly deteriorates in strength even under wet conditions, it is very preferable because it does not change in form and has excellent wearability.

  Usually, the solvent-spun cellulosic fiber is often beaten by a beater, refiner, high-speed disintegrator, etc. to fibrillate the fiber, but in the present invention, fine fibers adhere to the face due to fiber fibrillation. In order to prevent this, it is desirable to use solvent-spun cellulose fiber that is not substantially fibrillated.

  The single fiber fineness of the core-sheath type composite fiber and the solvent-spun cellulosic fiber is not particularly limited, but the softness is particularly preferred when it comes into contact with the skin. It is preferably 1 to 2 dtex, more preferably 1.3 to 1.7 dtex. When the single fiber fineness exceeds 3 dtex, the touch to the skin may be deteriorated, or the fluid absorbability and the liquid retaining property of the fluid composition containing the cosmetic composition may be inferior. On the other hand, if it is 1 dtex or less, the density of the nonwoven fabric is increased and the inter-fiber voids are decreased, so that the impregnating agent of the fluid composition is not preferable.

Furthermore, the polarity of the whole nonwoven fabric sheet can be adjusted by the mixing ratio of the solvent-spun cellulose fiber and the core-sheath type composite fiber and the resin polarity of the sheath part, which can determine the impregnation amount and feel of the fluid composition. By adjusting the thickness of each fiber, the touch can be adjusted without affecting the amount of impregnation of the fluid composition.
That is, when solvent-spun cellulose-based fibers are thickened, the number of cellulose-based fibers decreases and the surface area decreases with the same basis weight. For this reason, the hydrophilicity of the resulting nonwoven fabric sheet decreases, and conversely increases when it is made thinner. Moreover, about the touch, it becomes rough by similarly making this cellulose fiber thick.
For example, an ethylene-vinyl alcohol copolymer in which the mixing ratio of solvent-spun cellulose fiber and core-sheath composite fiber is 40:60, and the sheath part of the core-sheath composite fiber is 50 mol% of ethylene component and 98% saponification degree. In some cases, the cosmetics used by coating the face with a nonwoven sheet, the ratio of the thickness of the core-sheath type composite fiber to the solvent-spun cellulose fiber is preferably in the range of 0.3 to 3.0, A range of 0.3 to 2.0 is more preferable.

The fiber length of the solvent-spun cellulose fiber and the core-sheath type composite fiber is in the range of 30 mm to 60 mm. If the length is too long, uniform entanglement between the fibers becomes difficult. Particularly, if the entanglement between the solvent-spun cellulose-based fiber and the core-sheath type composite fiber is insufficient, the uniformity of the nonwoven fabric sheet becomes insufficient, and the touch only deteriorates. This is not preferable because the efficiency of liquid absorption and release of the fluid composition is reduced.
On the other hand, if the length is too short, not only is the fiber coming out of the nonwoven fabric sheet easily, but also flexibility and stretchability are lowered, which is not preferable.
From such a viewpoint, the fiber length of the solvent-spun cellulose-based fiber is 30 mm to 60 mm,
Preferably it is 35 mm-50 mm. The fiber length of the core-sheath type composite fiber is 30 mm to 60 mm, preferably 45 mm to 60 mm.
Further, the ratio of the fiber length of the solvent-spun cellulose fiber and the core-sheath type composite fiber is preferably 0.5 to 2, more preferably 0.8 to 1.5.

  In addition, the fibers constituting the nonwoven fabric of the present invention may contain a stabilizer such as a copper compound, a colorant, an ultraviolet absorber, a light stabilizer, an antioxidant, an antistatic agent, a plasticizer, a lubricant, and a crystallization as necessary. A rate retarder or the like can be added during or after the copolymer reaction of ethylene and vinyl ester. In particular, in order to suppress thermal degradation during melt molding, it is preferable to add a small amount of acid or metal salt to EVOH. Examples of the acid include fatty acids such as acetic acid, and examples of the metal salt include salts of alkali metals such as phosphoric acid and acetic acid, and alkaline earth metals.

  Next, a core-sheath composite fiber and a solvent-spun cellulose-based fiber whose core part is made of polyester are uniformly blended to form a web, which can be entangled by hydroentanglement to obtain a desired nonwoven sheet. Can be formed using a direct method such as a spunbond method or a melt blow method, a dry method such as a card method or an air array method using staple fibers, or a wet method. Among these, as the method for producing the nonwoven fabric sheet of the present invention, it is preferable to use a dry method in which it is easier to secure a space for mixing fibers and impregnating a chemical solution. As the staple fiber web in this case, a random web, a semi-random web, a parallel web, a cross wrap web, or the like is preferably used.

  In forming the web, the blending ratio of the core-sheath composite fiber and the solvent-spun cellulose fiber described above is a mass ratio of core-sheath composite fiber: solvent-spun cellulose fiber = 30: 70 to 80:20. It is preferable. More preferably, the core-sheath type composite fiber: solvent-spun cellulose fiber = 25: 75 to 75:25, and more preferably 50:50 to 70:30. When the blending ratio of the core-sheath composite fiber is less than 30, particularly when wet, the unique squeaky feeling of the cellulosic fiber becomes strong, and the smoothness of the nonwoven fabric is reduced. Moreover, the ratio which takes in a chemical | medical solution in a fiber goes up, and the effective utilization to skin is prevented. On the other hand, when the blending ratio exceeds 80, the impregnation force, particularly the impregnation speed, is lowered, the chemical solution holding power is lowered, and the chemical solution is unnecessarily discharged from the inside of the sheet and flows down.

  Next, it is possible to entangle the constituent fibers by subjecting the obtained web to hydroentanglement treatment and to form irregularities on the surface. This unevenness is formed on the surface of the nonwoven fabric by carrying out the manufacturing under predetermined conditions at the time of hydroentanglement. This makes it possible to hold liquid not only in the voids in the nonwoven fabric but also in the concave portion on the surface of the nonwoven fabric, so that a lot of cosmetics can be held on the surface without necessarily increasing the thickness of the sheet. Further, at this time, the entire fiber absorbs water from the water flow, and a part of the solvent-spun cellulosic fiber that is easy to move by the force of the water flow extends in the water flow direction, that is, the height direction of the convex portion, and at the same time exhibits hydrophilicity and lipophilicity. Since the core-sheath type composite fiber of the present invention having EVOH as a sheath part is difficult to move in the height direction of the convex part due to the hydrophobicity and rigidity of the core part, most of the fibers extend in the nonwoven fabric surface direction. . Since these fibers are basically in a state of being mixed with each other, the nonwoven fabric of the present invention has both hydrophilicity and lipophilicity, and both the hydrophilic and lipophilic fluid composition are contained in this irregular shape. It can be held. In addition, the fluid composition held here does not enter the tissue of the nonwoven fabric, and therefore the cosmetic composition of the present invention is very easily transferred to the skin due to the presence of the cosmetic composition on the nonwoven fabric surface. It develops extremely good transferability to the skin. Moreover, even when the cosmetic composition is uneven on the surface of the nonwoven fabric, the fiber itself has both hydrophilic and oleophilic properties, so that the cosmetic composition does not flow down.

  The unevenness described above is preferably continuous in a certain direction at a pitch of 0.04 to 0.5 mm while the height difference between the recess and the protrusion is in the range of 0.1 to 0.4 mm. When the height difference is 0.1 mm or less, the surface of the nonwoven fabric becomes too smooth, and the fluid composition cannot be held using the surface irregularities. Furthermore, since the entire surface comes into contact with the skin, a feeling of stuffiness and stickiness is generated when worn, which is not preferable. In addition, when the height difference is 0.4 mm or more, the water holding portion becomes large, so the water retention amount is improved, but the ratio of the solvent-spun cellulosic fiber tends to be high near the tip of the convex portion. Since the water absorption behavior depends on the properties of the solvent-spun cellulosic fiber, there is a high possibility that the water retention amount is improved while the liquid releasing property is lowered. Furthermore, the smoothness of the surface is hindered, the touch is lowered, and the feeling of wearing is lowered. On the other hand, when the pitch is 0.04 mm or less, the concave portion becomes too narrow and cosmetics cannot enter, and it is difficult to effectively use the surface unevenness to hold the fluid composition, which is not preferable. Further, when the pitch is 0.5 mm or more, it is not preferable because the inter-fiber distance of the portion constituting the convex portion becomes too wide to hold the chemical liquid that has entered the concave portion.

  The surface unevenness | corrugation of the said description can process about the sheet | seat by which the fiber was entangled by the hydroentanglement beforehand. The hydroentanglement to be treated in advance is a nozzle in which nozzles having a nozzle diameter of 0.08 to 0.2 mm and a pitch of 0.4 to 1 mm are arranged in 1 to 3 rows on a metal porous plate or a woven structure support. A method of treating from a plate once or a plurality of times with a water flow of 1 to 6 MPa, more preferably 2 to 4 MPa is preferable.

  The unevenness of the nonwoven fabric is preferably formed by water flow treatment on the fiber woven structure in at least the last treatment of the water flow entanglement treatment. As a support for the woven structure, warp and weft are each composed of monofilaments having a wire diameter of 0.01 to 1 mm, more preferably 0.02 to 0.5 mm, and the thickness of the woven structure is 0.1 to 1 mm. It is preferred to use. When the diameter of the monofilament is 1 mm or more, it is not preferable because the fiber moves to the periphery at the location where the warp is present on the weft, and the surface is inferior in smoothness due to the opening of holes on the nonwoven fabric surface. Further, from the top of the woven structure, a nozzle having a hole diameter of 0.05 to 0.3 mm, more preferably 0.08 to 0.2 mm, is provided with a water pressure of 6 to 15 MPa, more preferably from a nozzle provided with an interval of 0.4 to 1 mm. A columnar water flow of 8 to 10 MPa may be jetted onto the web entangled to some extent in the previous stage.

  By such hydroentanglement treatment, a nonwoven fabric having surface irregularities suitable for holding the fluid composition can be obtained.

  Furthermore, the EVOH resin has the property of easily releasing both the adsorbed hydrophilic component and lipophilic component as its characteristics. The reason for this is presumed that the polymer molecule has both a hydrophilic component and a lipophilic component at the same time.

The ethylene-vinyl alcohol copolymer has a high affinity for the skin due to the hydroxyl group.
When the nonwoven fabric sheet of the present invention is used as a cosmetic comprising a fluid composition containing a cosmetic composition, the copolymer composition is selected according to the polarity of the fluid composition containing the cosmetic composition. By adjusting, the impregnation property of the fluid composition can be enhanced.

  That is, when using the lipophilic fluid composition, it is preferable to use a copolymer having a high ethylene composition. When using the hydrophilic fluid composition, it is preferable to use a copolymer having a low ethylene composition. . Similarly, the hydrophilicity can be adjusted by the degree of saponification. Furthermore, not only the degree of saponification but also the affinity with various fluids can be adjusted by the type of unsaponified ester and the functional group modification of the hydroxyl group.

The impregnation property can also be improved by adjusting the ratio of solvent-spun cellulose-based fibers.
That is, when the lipophilic fluid composition is used, the proportion of the solvent-spun cellulose fiber is reduced. When the hydrophilic fluid composition is used, the proportion of the solvent-spun cellulose fiber is increased. Is preferred.

  Although the actual impregnation property varies depending on the viscosity of the fluid composition, the copolymer composition of the ethylene-vinyl alcohol copolymer and / or the solvent-spun cellulose system in consideration of the balance with the touch and the liquid retaining property. It can be adjusted by the proportion of the fibers.

  The core-sheath type composite fiber and solvent-spun cellulose fiber having such properties are uniformly mixed to form a single layer, and the porosity is 80% to 95% so as to have a predetermined interfiber spacing. By making the hydroentangled non-woven fabric like this, it is lightweight and has a high balance between hydrophilicity and lipophilicity as a total, and it is easy to absorb and release both oily and aqueous components to the same extent, and It becomes possible to do.

  The nonwoven fabric sheet of the present invention is able to conform to a surface having a complicated shape by this flexibility, particularly in a wet state, but this is due to stress at 50% wet elongation in at least one direction of the nonwoven fabric. It is correlated, and this value is preferably 500 g / 50 mm or less. More preferably, it is 400 g / 50 mm or less, More preferably, it is 300 g / 50 mm or less. When this value exceeds 500 g / 50 mm, it becomes difficult for the base material to follow the unevenness of the face, which makes it difficult to replenish the cosmetic material for the entire face, which is the object of the present application.

Basis weight of the hydroentangled nonwoven fabric suitable for non-woven fabric sheet of the present invention, the range and adhesion to the skin 30 to 100 g / ^{m 2,} preferably from the viewpoint of the absorbent, is particularly from 40~70g / ^{m 2} preferable. When the basis weight is less than 30 g / m ² , the absolute fiber amount is decreased, and the amount of the fluid composition that can be absorbed and held between the fibers is extremely decreased. Moreover, when it exceeds 100 g / m < ² >, since the amount of fibers increases too much and the thickness of a nonwoven fabric sheet becomes too thick, alongside property falls and it is unpreferable.

  Moreover, it is necessary for the nonwoven fabric sheet of this invention to ensure liquid discharge property with the target liquid absorption property simultaneously. That is, the non-woven fabric of the present invention has both hydrophilic and lipophilic fibers as constituent fibers, so that liquids having both properties are absorbed and adsorbed, but among these liquids, It can be considered that the lipophilic component is mainly retained in the EVOH portion, and the hydrophilic component is partially retained in EVOH and most is retained in cellulose. These liquids are held on the fiber surface, and those that cannot be held directly on the fiber surface because of the amount larger than this, are formed by surrounding the same type of fibers (EVOHs or celluloses). By being filled and held inside, it becomes possible to secure a liquid amount equal to or larger than the adsorption amount of the nonwoven fabric constituting fibers. Therefore, for the sake of convenience, the void ratio is used in order to clarify the existence of the void filled with the liquid described here. The nonwoven fabric sheet in the present invention preferably has a porosity of 80% to 95%. More preferably, it is 85 to 93%. When the porosity is 95% or more, the distance between fibers is too large, and the chemical solution cannot be held by the hydrophilic portion of the fibers, which is not preferable. On the other hand, when the ratio is 80% or less, the distance between the fibers is too narrow, and the chemical solution cannot enter the nonwoven fabric, so that the amount of liquid absorption decreases.

  Furthermore, in the cosmetic of the present invention comprising the nonwoven fabric sheet and the flowable composition containing the cosmetic composition, the nonwoven fabric sheet has a high liquid absorption performance capable of holding a sufficient amount of the cosmetic composition. Things are necessary. In the present invention, this is expressed by using the liquid absorption speed and the liquid retention rate.

  First, the nonwoven fabric sheet suitable for the cosmetic of the present invention needs to have excellent liquid absorption performance, and the preferable liquid absorption speed is 5 seconds or less. More preferably, it is 3 seconds or less, More preferably, it is 2 seconds or less, More preferably, it is 1.5 seconds or less. When the liquid absorption speed exceeds 5 seconds, the fluid composition containing the cosmetic composition is difficult to impregnate, and in particular, when the liquid composition containing the personal cosmetic composition is impregnated in each household, The composition may flow down on the surface, and as a result, the cosmetic composition is not impregnated in the substrate and is wasted. As a flowable composition containing a cosmetic composition, generally an oily flowable composition has a high viscosity, and an aqueous flowable composition tends to have a low viscosity. If the viscosity is low, the liquid absorption rate tends to increase. Therefore, the preferred liquid absorption speed is 5 seconds or less in the former, but 3 seconds or less in the latter.

  And the nonwoven fabric sheet suitable for the cosmetic of the present invention needs to be able to supply more sufficient cosmetic composition to the skin. For this reason, it is necessary that the liquid retention rate, which is a ratio of the liquid retention amount to the nonwoven fabric basis weight, which is an index of the liquid retention amount of the fluid composition containing the cosmetic composition to the nonwoven fabric sheet, is preferable and is preferable. The liquid ratio is 900% or more, more preferably 1000% or more. In order to impregnate a flowable composition containing a target amount of a cosmetic composition when the liquid retention rate is low, it is necessary to prepare various nonwoven fabric sheets whose basis weight and composition are changed according to the amount of impregnation, The nonwoven fabric sheet of the present invention can cope with various amounts of impregnation with one kind.

  Furthermore, when the cosmetic composition of the present invention is applied to the face, a fluid composition containing the cosmetic composition flows along the face in the nonwoven fabric, and finally, troubles such as dripping from the jaw and soiling of the clothes occur. It is also important not to. In the present invention, this performance is expressed as a liquid dripping rate, and this value is preferably 3.5% or less. More preferably, it is 3% or less, more preferably 2.5% or less.

  And it is very important that the flowable composition containing the cosmetic composition impregnated in a large amount in the nonwoven fabric sheet and held so as not to dripping by the method as described above efficiently migrates to the skin. In the present invention, this is expressed as a release rate, and this value is desirably 95% or more. If it is less than 95%, an effective cosmetic composition is incorporated into the fiber and cannot be effectively used on the skin. It is important to satisfy that the ratio of the fluid composition containing the cosmetic composition retained and retained by the nonwoven sheet is 95% or more.

  In particular, the cosmetic of the present invention does not necessarily have a high basis weight by balancing it in a high dimension with respect to the impregnation property of the fluid composition containing the cosmetic composition, that is, the liquid absorption speed and the liquid retention amount, the liquid dripping rate, and the release rate. Without securing, it is possible to realize a cosmetic that is excellent in wet fit and can supply a sufficient cosmetic composition to the skin.

  The nonwoven fabric sheet of the present invention is usually used by impregnating the fluid composition, but may be used by impregnating the fluid composition at the time of use, or may be impregnated with the fluid composition in advance. . In the former case, there is a merit that the user can make the cosmetics impregnated by selecting and impregnating their favorite cosmetic composition for cosmetic use, for example. Moreover, the product package can be simplified by being supplied in a dry state.

There is no restriction | limiting in particular in a fluid composition in the use which impregnates a fluid composition in the nonwoven fabric sheet of this invention. Examples thereof include aqueous fluid compositions such as water, aqueous solutions and aqueous emulsions, organic solvents, solutions using these as a medium, and mixtures thereof. Moreover, the fluid composition which melt | dissolved and / or disperse | distributed various solid, liquid, gas which melt | dissolves or disperse | distributes well to these fluid compositions is also used suitably. A non-woven sheet having excellent functionality can be obtained by a flowable composition in which various active ingredients are dissolved and / or dispersed. Of these, hydrophilic fluid compositions including aqueous fluid compositions and fluid compositions containing polar organic solvents are advantageous from the viewpoint of impregnation, and also advantageous from the viewpoint of safety to the human body. is there. In particular, the aqueous fluid composition is most advantageous from the viewpoint of liquid retention. Examples of the polar organic solvent include various organic solvents having a polar functional group. Examples of the polar functional group include a hydroxyl group, an aldehyde group, a carboxyl group, an alkoxycarbonyl group, an ether group, a carbonyl group, an amino group, a nitro group, and a thio hydroxyl group. , Etc. Examples of these hydrophilic fluid compositions include water, lower aliphatic alcohols (eg, C _1-6 alkyl alcohols such as ethanol and isopropanol), and alkylene glycols (eg, ethylene glycol, diethylene glycol, propylene glycol, etc.). ) And the like. In addition, unsaturated higher fatty acids (for example, oleic acid, oleyl alcohol, etc.), animal and vegetable oils (for example, jojoba oil, olive oil, palm oil, camellia oil, macadamia nut oil, avocado oil, corn oil, sesame oil, wheat Germ oil, linseed oil, castor oil, squalane, etc.) are also preferably used.

  These liquid substances can be used alone or in combination of two or more. For example, liquid oil may be used in combination as an additive (oil component) with respect to a hydrophilic solvent such as water or ethanol. Of these liquid substances, water, lower alcohols or mixtures thereof are usually used, preferably water and / or ethanol (especially water). For example, when water and a lower alcohol (particularly ethanol) are used in combination, the ratio of the two is water / lower alcohol = 100/0 to 30/70, preferably 100/0 to 50/50, more preferably 100. It is about / 0 to 70/30, for example, about 99/1 to 80/20.

  As active ingredients, conventional additives such as humectants, emollients, UV protection agents, surfactants, astringents, enzymes, refreshing agents, bactericides or antibacterial agents, emollients (eg salicylic acid or Derivatives thereof, lactic acid, urea, etc.), antioxidants (eg, tocopherol or derivatives thereof, polyphenols such as anthocyanins), whitening agents (eg, ascorbic acid or derivatives thereof, cysteine, placenta extract, arbutin, kojic acid, lucinol) , Ellagic acid, chamomile extract, etc.), antiperspirants (eg, astringents such as aluminum compounds, zinc compounds, tannins, etc.), rough skin prevention agents (eg, glycyrrhizinate, vitamins, etc.), anti-inflammatory agents (eg, Allantoin, guaiazulene, glycyrrhizic acid or a salt thereof, glycyrrhetinic acid or a salt thereof, ε-amino Caproic acid, tranexamic acid, ibuprofen, indomethacin, etc.), blood circulation promoter (eg, peony, rosemary, clove), vitamins (eg, vitamin A, vitamin B, vitamin C, vitamin D, vitamin E, vitamin K, etc.) ), Amino acids (for example, tryptophan, cysteine, etc.), cell activators (for example, riboflavin, pyridoxine, nicotinic acid, pantothenic acid, α-tocopherol, or derivatives thereof, plant extracts such as yukinoshita extract), flavors (for example, Synthetic perfumes, essential oils, essential oil components, etc.). These additives can be used alone or in combination of two or more.

  The impregnation amount of the fluid composition to be used is not particularly limited as long as a predetermined effect can be obtained, and may be appropriately selected depending on the purpose of the user. For example, in the water-containing sheet or cosmetic provided by the present invention, the base material is used. About 200-1000 mass% with respect to mass is preferable from the surface of cost and performance.

  The water-containing sheet of the present invention can be provided with a function by containing, for example, at least one of the above fluid composition and active ingredient in addition to water. These fluid compositions and active ingredients do not need to be water-soluble, but those having a high affinity with water can improve the homogeneity of the water-containing sheet and increase the fluid composition and active ingredients that add functions. It is easy to impregnate the nonwoven fabric sheet at a concentration. In addition, it is advantageous in terms of production efficiency as well as improving the homogeneity of the water-containing sheet to be integrated with the nonwoven fabric sheet together with water in the state of an aqueous solution, dispersion, or emulsion. In particular, aqueous solutions, aqueous dispersions, and aqueous emulsions have high affinity with the solvent-spun cellulose fiber of the nonwoven sheet of the present invention, and can be integrated at a high concentration with the nonwoven sheet, so that high functionality can be obtained, and the uniformity and production of the hydrous sheet It is further advantageous in terms of efficiency.

  The fluid composition containing the cosmetic composition used in the cosmetic of the present invention is in the state of, for example, a solution, a dispersion, or an emulsion. Further, for example, it contains at least one of water and the above fluid composition. The cosmetic composition includes at least one substance having a cosmetic function, including the case where the cosmetic composition itself has fluidity, and the case where the cosmetic composition is in a solid form or the like and has substantially no fluidity. It is a composition containing. When the cosmetic composition itself has fluidity, only the cosmetic composition may be integrated with the nonwoven sheet as a fluid composition, but usually the fluidity is improved by mixing with other liquids to increase fluidity. The production efficiency when integrating the composition is increased and the release property is also increased. The liquid mixed with the cosmetic composition has a high affinity with the cosmetic composition, so it can be integrated with the nonwoven fabric sheet at a high concentration, so that a high function can be obtained, and even in terms of cosmetic homogeneity and production efficiency. It is advantageous. There is no restriction | limiting in particular as a function of the cosmetics composition to be used, The cosmetic composition which has a normally known various function can be used 1 type or in mixture.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further more concretely, this invention is not limited to these Examples at all. In addition, each physical property value in a present Example was measured with the following method.

[Thickness test method]
The thickness is measured by a method for measuring the thickness according to JIS L 1096 8.5. Thickness gauge is Mitutoou
Using a Digimatic indicator made by Corporation, measuring element 1 inch Φ
Measurement was performed at a load of 12 g / cm ² .

[Porosity]
Basis weight of nonwoven fabric (g / m ² ) Fiber specific gravity (g / cm ³ ) From nonwoven fabric thickness (cm), it can be calculated by the following formula: Porosity (%) = 100 − ((nonwoven fabric basis weight (g) / fiber specific gravity ( g / cm ³ )) / (nonwoven fabric volume (cm ³ ))
× 100)

[touch]
The touch when the sheet of the present invention was touched was subjected to sensory evaluation according to the following criteria by five subjects.
<Evaluation criteria>
〇: Feels good △: Feels slightly unsatisfactory ×: Feels unsatisfactory

[Liquid absorption speed]
The liquid absorption rate was carried out according to JIS L 1907 7.1.1 dropping method.
A drop of liquid was dropped from 1 cm above the non-woven fabric in a state of gripping the surroundings with a burette, and the time until no special light reflection of the droplets on the surface was measured. Tests I and II were carried out with the dropping liquid.
Test I: Ion-exchanged water Test II: Nisshin Oillio Group, Inc.

[Test method for liquid retention rate]
Measured according to JIS L 1907 7.2 water absorption. Cut the test piece into 5 cm square and measure the weight (Ag). The test piece was immersed in a fluid composition containing a cosmetic composition (Esan Co., Ltd., Asan Roller Lotion) for 30 seconds. Thereafter, one side of the test piece was picked up from the liquid, and the weight after 10 seconds (Bg) and the weight after 1 minute (Cg) were measured.
The liquid retention rate (D%) is calculated by the following formula.
D (%) = (C−A) / A × 100

[Test method for release rate (F%)]
The sample whose water retention rate was measured was sandwiched between filter papers (corrected filter paper No. 2) cut into a 10 cm square and weighed to about 2.5 g, and a weight of 2 kg was placed from the top and allowed to stand for 1 minute. After 1 minute, a sample is taken out and the weight increase of the filter paper is measured. Increased weight Gg. The release rate (F%) of the fluid composition containing the cosmetic composition is calculated by the following formula.
F (%) = G / (C−A) × 100

[Measurement method of unevenness on nonwoven fabric surface]
The measurement of a recessed part and a convex part is obtained by measuring three places and measuring the difference of the recessed part and convex part which observe a cross section of a nonwoven fabric using KEYENCE microscope VH-6300.

[Wet 50% elongation stress]
The stress at the time of 50% elongation is the strength value when the elongation reaches 50% when a tensile test is performed with Shimadzu Autograph AGS-50D, sample width 50 mm, measurement length 100 mm, measurement speed 200 mm / min. Indicated by

[Example 1]
The core is polyethylene terephthalate, the sheath is EVOH (ethylene content 44 mol%, saponification degree 98.4
Mol%) core-sheath type composite staple fiber (manufactured by Kuraray Co., Ltd., “Sophista”, 1.7 dtex, 51 mm long,
Core-sheath mass ratio = 50/50, circular cross-section, core diameter 8.9 μm) 70% by mass Solvent-spun cellulose fiber (manufactured by Lenzing, “Lyocell”, 1.7 dtex, 38 mm length) 30% by mass A card web having a weight per unit area of about 60 g / m ² was produced.
Next, a water stream is sprayed on the card web, and an entanglement treatment is performed to obtain a hydroentangled nonwoven fabric having a basis weight of 60 g / m ² .
The nonwoven fabric sheet of this invention was obtained. In the water entanglement process, a nozzle having 0.1 mm diameter orifices provided at intervals of 0.6 mm in the width direction of the web was used to entangle the water pressure 6 MPa in two steps on the front and back. Moreover, the porosity of the obtained nonwoven fabric sheet was 92%.
This sheet had sufficient water retention and water release properties and good touch.

[Example 2]
Same as Example 1 except that 50% by mass of the core-sheath type composite staple fiber used in Example 1 and 50% by mass of solvent-spun cellulose fiber were mixed to produce a card web having a basis weight of about 60 g / m ^2. Thus, a nonwoven fabric sheet of the present invention was obtained. Moreover, the porosity of the obtained nonwoven fabric sheet was 90%.
This sheet had good water retention and water release properties and good touch.

[Example 3]
Same as Example 1, except that 10% by mass of the core-sheath type composite staple fiber used in Example 1 and 90% by mass of solvent-spun cellulose-based fiber were mixed to produce a card web having a basis weight of about 60 g / m ^2. Thus, a nonwoven fabric sheet was obtained. Moreover, the porosity of the obtained nonwoven fabric sheet was 88%.
This sheet had good water retention and water release properties and good touch.

[Example 4]
A water stream was jetted onto the same fiber-constituting web as in Example 1 and entangled to give a hydroentangled nonwoven fabric with a basis weight of 60 g / m ² . The water entanglement treatment uses a nozzle having 0.08 mm diameter orifices arranged at intervals of 0.6 mm in the width direction of the web, and sandwiches a polyester net with 76 meshes on the top and bottom, and water pressure 6 MPa in two steps The sheet of Example 4 was obtained as a result of spraying and hydroentanglement treatment. Although there was a test subject who felt that it was slightly peeled when used for a long time as compared with Example 1, the fit to the skin was good and the skin was sufficiently practical.

[Comparative Example 1]
A nonwoven fabric sheet was obtained in the same manner as in Example 1 except that a card web having a core-sheath type composite staple fiber of 100% by mass and having a basis weight of about 60 g / m ² was produced. Moreover, the porosity of the obtained nonwoven fabric sheet was 93%.
This sheet had excellent water retention and water release properties, but was difficult to use because of its low water absorption rate.

[Comparative Example 2]
A nonwoven fabric sheet was obtained in the same manner as in Example 1 except that a card web having a fabric weight of 60 g / m ² was produced with 100% cotton fiber manufactured by Marusan Co., Ltd. Moreover, the porosity of the obtained nonwoven fabric sheet was 93%.
This sheet had a high 50% elongation stress and was inferior in flexibility and fit to the skin.

[Comparative Example 3]
Except for using a core-sheath type composite fiber having a fiber length of 25 mm, an attempt was made to produce a non-woven fabric with the same composition as in Example 1. However, the card web slipped through the process and could not become a sheet.

[Comparative Example 4]
Except for using a core-sheath type composite fiber having a fiber length of 80 mm, a non-woven fabric was produced with the same composition as in Example 1. Furthermore, since the entanglement is insufficient, the touch is not good and it is not preferable.

  The above Examples and Comparative Examples are shown in Table 1.

Claims (5)

  A solvent-spun cellulose-based fiber having a fiber length of 30 to 60 mm and a core-sheath type composite fiber are woven with each other, the core-sheath type composite fiber comprising a sheath part and a core part, A nonwoven fabric sheet characterized in that the sheath is an ethylene-vinyl alcohol copolymer and the core is made of a hydrophobic resin and has a diameter of 5 to 15 µm.   2. The nonwoven fabric sheet according to claim 1, wherein the surface of the nonwoven fabric sheet has irregularities.   The nonwoven fabric sheet according to claim 1, comprising 30-80% by mass of the core-sheath type composite fiber.   A water-containing sheet in which the nonwoven fabric sheet according to any one of claims 1 to 3 and water are integrated.   A cosmetic comprising the nonwoven fabric sheet according to any one of claims 1 to 3 and a fluid composition containing the cosmetic composition.