JP2012067399A - Nonwoven fabric for cosmetic product and cosmetic product using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nonwoven fabric for a cosmetic product, excellent in stickiness to skin and handleability, and a cosmetic product formed by using the nonwoven fabric.SOLUTION: Provided is a nonwoven fabric for a cosmetic product, having basis weight of 30 to 100 g/m, in which a humid dynamic friction coefficient is 2.0 or more, and humid bending resistance is in a range of 1 to 5 cm. Provided is a cosmetic product obtained by using the nonwoven fabric for a cosmetic product.

Description

  TECHNICAL FIELD The present invention relates to a non-woven fabric for cosmetic products having excellent adhesion to the skin and easy handling, and a cosmetic product using the non-woven fabric.

Conventionally, various products have been proposed as cosmetic products (sometimes referred to as cosmetic products) centering on face masks. For example, the thing using the hydrophilic fiber in consideration of the water content of the cosmetic liquid, the thing using the extra fine fiber in order to improve the adhesion to the skin at the time of use, etc. are proposed (for example, patent documents 1-1). 4).
However, these cosmetic products have not yet been satisfactory in terms of adhesion to the skin and handleability.

JP 2006-274468 A JP 2007-70347 A JP 2009-97121 A Japanese Patent No. 3944526

  The present invention has been made in view of the above-described background, and an object thereof is to provide a non-woven fabric for cosmetic products having excellent adhesion to the skin and handleability, and a cosmetic product using the non-woven fabric. .

  As a result of intensive studies to achieve the above-mentioned problems, the present inventors have obtained a cosmetic product such as a face mask using a nonwoven fabric having a specific wet dynamic friction coefficient and wet bending resistance. The present inventors have found that a cosmetic product excellent in handleability can be obtained, and have further intensively studied to complete the present invention.

Thus, according to the present invention, “a non-woven fabric for cosmetic products having a basis weight of 30 to 100 g / m ² , a wet dynamic friction coefficient of 2.0 or more, and a wet bending resistance in the range of 1 to 5 cm. A non-woven fabric for cosmetic products characterized by the above. "
However, the wet dynamic friction coefficient and the wet bending resistance are measured after the sample is immersed in water at a temperature of 20 ° C. and then suspended for 10 minutes in an environment at a temperature of 20 ° C. and a relative humidity of 65%.

  In this case, the polyester is a very fine polyester having a single fiber diameter (D) of 500 to 1000 nm and a ratio (L / D) of the fiber length (L) nm to the single fiber diameter (D) nm of 600 to 3000. It is preferable that the fiber A and the organic fiber B having a single fiber fineness of 0.05 to 1.0 dtex and a fiber length of 3 to 20 mm are included in the former / the latter weight ratio of 1/99 to 50/50. As such an ultra-fine polyester fiber A, an alkali weight loss processing is applied to a composite fiber comprising an island component made of polyester and having an island diameter (D) of 500 to 1000 nm and a sea component made of an aqueous alkali-soluble polymer than the polyester. It is preferable that the sea component is dissolved and removed by applying.

In the nonwoven fabric for cosmetic products of the present invention, it is preferable that the ultra-fine polyester fiber A is exposed on at least one surface of the nonwoven fabric. Moreover, it is preferable that the nonwoven fabric is a nonwoven fabric in which fibers are entangled with each other by a high-pressure water stream after the sheet is formed by a wet papermaking method. Moreover, it is preferable that the tensile strength of a nonwoven fabric is 10 N / 5cm or more.
Moreover, according to this invention, the cosmetic product which uses the said nonwoven fabric for cosmetic products and contains a cosmetic liquid is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the cosmetics nonwoven fabric excellent in the sticking property to skin and the handleability, and the cosmetics product using this nonwoven fabric are obtained.

Hereinafter, embodiments of the present invention will be described in detail.
First, the nonwoven fabric for cosmetic products of the present invention is a nonwoven fabric for cosmetic products (sometimes referred to as cosmetic products) such as beauty products or cosmetic products, and the basis weight is 30 to 100 g / m ^2. It is important to be within the range of (more preferably 40 to 90 g / m ² ). If the basis weight is less than 30 g / m ² , the tensile strength of the nonwoven fabric may be lowered, which is not preferable. On the other hand, when the basis weight is larger than 100 g / m ² , there is a possibility that the skin along the skin may be deteriorated.

  Next, in the nonwoven fabric for cosmetic products of the present invention, it is important that the coefficient of wet dynamic friction is 2.0 or more (preferably 2.0 to 3.0). When the wet dynamic friction coefficient is less than 2.0, the sticking property to the skin is lowered, which is not preferable. The larger the wet dynamic friction coefficient, the better the sticking property to the skin. However, if it exceeds 3.0, there is a risk of rough skin, so it is preferably in the range of 2.0 to 3.0. Moreover, it is preferable that the ratio of the dry dynamic friction coefficient to the wet dynamic friction coefficient (dry dynamic friction coefficient / wet dynamic friction coefficient) is in the range of 0.5 to 1.5. If the dry dynamic friction coefficient / wet dynamic friction coefficient is less than 0.5, the cosmetic product may be easily peeled off from the skin when the cosmetic liquid is dry. On the other hand, if the dry dynamic friction coefficient / wet dynamic friction coefficient is greater than 1.5, rough skin may occur.

  The wet dynamic friction coefficient is measured immediately after suspending a sample in water at a temperature of 20 ° C. and suspending it in an environment of a temperature of 20 ° C. and a relative humidity of 65% for 10 minutes. On the other hand, the dry dynamic friction coefficient is measured immediately after being left for one week in an environment of a temperature of 20 ° C. and a relative humidity of 65%.

  Moreover, in the nonwoven fabric for cosmetic products of the present invention, it is important that the wet bending resistance is in the range of 1 to 5 cm (more preferably 2 to 4 cm). When the wet bending resistance is less than 1 cm, the cosmetic product is difficult to open, and the handleability is lowered, which is not preferable. On the other hand, when the wet stiffness is greater than 5 cm, it is not preferable because the along the skin is lowered. Moreover, it is preferable that the ratio of the dry bending resistance to the wet bending resistance (dry bending resistance / wetting bending resistance) is in the range of 2.0 to 4.0. If the dry bending resistance / wet bending resistance is less than 2.0, wrinkles may occur during drying. On the other hand, if the dry bending resistance / wet bending resistance is greater than 4.0, there is a risk that the floating during drying will increase.

  The wet bending resistance is measured immediately after the sample is immersed in water at a temperature of 20 ° C. and then suspended for 10 minutes in an environment at a temperature of 20 ° C. and a relative humidity of 65%. On the other hand, the dry bending resistance is measured immediately after being left for 1 week in an environment of a temperature of 20 ° C. and a relative humidity of 65%.

  The non-woven fabric for cosmetic products as described above is made of polyester, for example, having a single fiber diameter (D) of 500 to 1000 nm and a ratio (L / D) of the fiber length (L) nm to the single fiber diameter (D) nm. An ultrafine polyester fiber A in the range of 600 to 3000, and an organic fiber B having a single fiber fineness of 0.05 to 1.0 dtex and a fiber length of 3 to 20 mm, the former / the latter weight ratio of 1/99 to 50 / 50 may be included.

  Here, in the said nonwoven fabric, it is preferable that the single fiber diameter of the ultra fine polyester fiber A exists in the range of 500-1000 nm. When the single fiber diameter is less than 500 nm, the ultra-fine polyester fibers A are apt to be pseudo-glueed and difficult to uniformly disperse, and thus the wet dynamic friction coefficient and the wet bending resistance may not be obtained. On the other hand, when the single fiber diameter is larger than 1000 nm, the effect as an ultrafine polyester fiber is lowered, and the wet dynamic friction coefficient and wet bending resistance may not be obtained. In addition, when the cross-sectional shape of the single fiber is an atypical cross section other than the round cross section, the diameter of the circumscribed circle is defined as the single fiber diameter. The single fiber diameter can be measured by photographing the cross section of the fiber with a transmission electron microscope.

  In the ultra-fine polyester fiber A, it is important that the ratio (L / D) of the fiber length (L) nm to the single fiber diameter (D) nm is in the range of 600 to 3000 (preferably 800 to 1500). is there. If the ratio (L / D) is less than 600, the fiber length becomes too short, so that the entanglement with other fibers becomes small, and the possibility that the fibers fall off becomes unfavorable. On the contrary, when the ratio (L / D) exceeds 3000, the fiber length becomes too long, the entanglement of the ultrafine polyester fiber A itself is increased, and the uniform dispersion may be hindered.

  Preferred examples of the polyester that forms the ultrafine polyester fiber A include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, stereocomplex polylactic acid, polylactic acid, and polyester obtained by copolymerizing a third component.

  Although it does not specifically limit as a manufacturing method of the above ultrafine polyester fibers, The method disclosed by the international publication 2005/095686 pamphlet is preferable. That is, in terms of single fiber diameter and uniformity thereof, an island component composed of a polyester polymer and having an island diameter (D) of 500 to 1000 nm, and an alkaline aqueous solution-soluble polymer (hereinafter, “ It is preferable that the composite fiber having a sea component composed of “easily soluble polymer”) is subjected to an alkali weight reduction process, and the sea component is dissolved and removed. The island diameter can be measured by photographing a cross section of the fiber with a transmission electron microscope. In addition, when the shape of the island is an atypical cross section other than a round cross section, the diameter of the circumscribed circle is used as the island diameter (D).

  Here, it is preferable that the dissolution rate ratio of the aqueous alkali-soluble polymer that forms the sea component to the polyester polymer that forms the island component is 200 or more (preferably 300 to 3000) because the island separability is good. When the dissolution rate is less than 200 times, the island component of the separated fiber cross-section surface layer is dissolved because the fiber diameter is small while the sea component in the center of the fiber cross-section is dissolved. Despite being reduced in weight, the sea component at the center of the fiber cross section cannot be completely dissolved and removed, leading to thick spots on the island component and solvent erosion of the island component itself, resulting in ultra-fine fibers with a uniform fiber diameter. There is a risk that it will not be possible.

  Preferable examples of the easily soluble polymer forming the sea component include polyesters, aliphatic polyamides, and polyolefins such as polyethylene and polystyrene, which are particularly good in fiber formation. As specific examples, polylactic acid, an ultrahigh molecular weight polyalkylene oxide condensation polymer, and a copolymerized polyester of polyalkylene glycol compound and 5-sodium sulfoisophthalic acid are optimal as the alkaline water soluble polymer. Here, the alkaline aqueous solution refers to potassium hydroxide, sodium hydroxide aqueous solution and the like. Besides these, hydrocarbon solvents such as hot toluene and xylene for formic acid for aliphatic polyamides such as nylon 6 and nylon 66, trichloroethylene for polystyrene, and polyethylene (especially high-pressure low-density polyethylene and linear low-density polyethylene). Examples thereof include hot water for polyvinyl alcohol and ethylene-modified vinyl alcohol polymers.

  Among polyester polymers, polyethylene terephthalate copolymer having an intrinsic viscosity of 0.4 to 0.6 obtained by copolymerizing 6 to 12 mol% of 5-sodium sulfoisophthalic acid and 3 to 10% by weight of polyethylene glycol having a molecular weight of 4000 to 12000. Polymerized polyester is preferred. Here, 5-sodium sulfoisophthalic acid contributes to improving hydrophilicity and melt viscosity, and polyethylene glycol (PEG) improves hydrophilicity. In addition, PEG has a hydrophilicity increasing action that is considered to be due to its higher-order structure as the molecular weight increases. However, since the reactivity becomes poor and a blend system is produced, problems arise in terms of heat resistance and spinning stability. there is a possibility. On the other hand, if the copolymerization amount is 10% by weight or more, there is an effect of decreasing the melt viscosity, which is not preferable.

  On the other hand, the polyester polymer forming the island component is as described above. In addition, for the polymer that forms the sea component and the polymer that forms the island component, organic fillers, antioxidants, heat, and so on, as long as they do not affect the spinning properties and the properties of the ultrafine fibers after extraction. Stabilizers, light stabilizers, flame retardants, lubricants, antistatic agents, rust preventive agents, crosslinking agents, foaming agents, fluorescent agents, surface smoothing agents, surface gloss improvers, mold release improvers such as fluororesins, etc. Even if an additive is included, it is acceptable.

  In the sea-island type composite fiber, it is preferable that the melt viscosity of the sea component at the time of melt spinning is larger than the melt viscosity of the island component polymer. In such a relationship, even if the composite weight ratio of the sea component is less than 40%, the islands are joined together, or the majority of the island components are joined to be different from the sea-island type composite fiber. hard.

  A preferred melt viscosity ratio (sea / island) is in the range of 1.1 to 2.0, especially 1.3 to 1.5. If this ratio is less than 1.1 times, the island components are likely to be joined during melt spinning, whereas if it exceeds 2.0 times, the viscosity difference is too large and the spinning tone tends to be lowered.

  Next, the number of islands is preferably 100 or more (more preferably 300 to 1000). The sea-island composite weight ratio (sea: island) is preferably in the range of 20:80 to 80:20. Within such a range, the thickness of the sea component between the islands can be reduced, the sea component can be easily dissolved and removed, and the conversion of the island component into ultrafine fibers is facilitated. Here, when the proportion of the sea component exceeds 80%, the thickness of the sea component becomes too thick. On the other hand, when the proportion is less than 20%, the amount of the sea component becomes too small, and joining between islands is likely to occur.

  As the die used for melt spinning, an arbitrary one such as a hollow pin group or a fine hole group for forming an island component can be used. For example, a spinneret in which a cross section of a sea island is formed by merging and compressing an island component extruded from a hollow pin or a fine hole and a sea component flow designed to fill the gap between them. Good. The discharged sea-island type composite fiber is solidified by cooling air and taken up by a rotating roller or an ejector set at a predetermined take-up speed to obtain an undrawn yarn. The take-up speed is not particularly limited, but is preferably 200 to 5000 m / min. Productivity is poor at 200 m / min or less. Also, spinning stability is poor at 5000 m / min or more.

  The obtained undrawn yarn may be subjected to the cutting process or the subsequent extraction process as it is depending on the use and purpose of the ultrafine fiber obtained after extracting the sea component, and the intended strength, elongation, and heat shrinkage may be used. In order to match the characteristics, it can be subjected to a cutting step or a subsequent extraction step via a stretching step or a heat treatment step. The stretching process may be a separate stretching method in which spinning and stretching are performed in separate steps, or a straight stretching method in which stretching is performed immediately after spinning in one process may be used.

  Next, after cutting such a composite fiber so that the ratio (L / D) of the fiber length (L) to the island diameter (D) is within the above range, the sea component is obtained by subjecting to an alkali weight reduction process. Is dissolved and removed. Such cutting is preferably performed by using a guillotine cutter, a rotary cutter, or the like with undrawn yarn or drawn yarn as it is or with a tow bundled in units of tens to millions.

The alkali weight loss processing may be after the nonwoven fabric is manufactured or before the nonwoven fabric is manufactured. In such alkali weight reduction processing, the ratio of fiber to alkaline solution (bath ratio) is preferably 0.1 to 5%, more preferably 0.4 to 3%. If it is less than 0.1%, the contact between the fiber and the alkali liquid is large, but the processability such as drainage may be difficult. On the other hand, if the amount is 5% or more, the amount of fibers is too large, and there is a risk that fibers will be entangled during alkali weight reduction processing. The bath ratio is defined by the following formula.
Bath ratio (%) = (Fiber mass (gr) / Alkaline aqueous solution mass (gr) × 100)

Moreover, it is preferable that the processing time of an alkali weight reduction process is 5 to 60 minutes, Furthermore, it is preferable that it is 10 to 30 minutes. If it is less than 5 minutes, the alkali weight loss may be insufficient. On the other hand, in the case of 60 minutes or more, the island component may be reduced.
In the alkali weight reduction processing, the alkali concentration is preferably 2% to 10%. If it is less than 2%, the alkali is insufficient, and the weight loss rate may be extremely slow. On the other hand, if it exceeds 10%, the weight loss of alkali proceeds too much and there is a risk that the weight may be reduced to the island portion.

  Moreover, it is preferable that the single fiber fineness of the said organic fiber B exists in the range of 0.05-1.0 dtex. If the single fiber fineness is less than 0.05 dtex, the texture becomes soft, but it is likely to be affected by the water flow in the paper making process, and the texture may be deteriorated. Conversely, if the single fiber fineness exceeds 1.0 dtex, the flexibility may be impaired. In addition, if the single fiber fineness is 0.05 to 1.0 dtex, the single fiber diameter is usually larger than 1000 nm.

The fiber length of the organic fiber B is preferably in the range of 3 to 20 mm. If the fiber length is less than 3 mm, the strength of the nonwoven fabric may be reduced. On the contrary, if the fiber length exceeds 20 mm, fiber dispersion by the papermaking method is extremely deteriorated, and the texture may be deteriorated.
In addition, it does not specifically limit as a fiber kind of the said organic fiber B, Any of synthetic fibers, such as the above-mentioned polyester fiber and polyolefin fiber, rayon fiber, cotton fiber, etc. may be sufficient.

  The said nonwoven fabric can be manufactured, for example with the following manufacturing methods. First, the ultra fine polyester fiber A or a precursor thereof (sea-island type composite fiber) and the organic fiber B are mixed with the ultra fine polyester fiber A (weight after dissolving and removing sea components of the sea-island type composite fiber) and organic. Prepare so that the weight ratio with the fiber B is in the range of (former / latter) 1/99 to 50/50. Here, when the weight ratio of the ultra fine polyester fiber A is smaller than the weight ratio, the wet dynamic friction coefficient and the wet bending resistance may not be obtained. On the contrary, when the weight ratio of the ultrafine polyester fiber A is larger than the weight ratio, the processability in producing the nonwoven fabric may be deteriorated, which is not preferable. In addition, as long as it is 10 weight% or less with respect to the total weight of a nonwoven fabric, you may use another fiber.

  Next, after forming the web by a wet papermaking method, after passing through a heat treatment step, it may be subjected to a high-pressure water stream treatment, or the web obtained by the wet papermaking method may be subjected to a high-pressure water stream treatment without being dried. . In consideration of the productivity of the nonwoven fabric, it is preferable to perform the high-pressure water flow treatment after the heat treatment step. Also, a card method in which fibers are opened and mixed using a roller with a needle with relatively long short fibers, or an airlaid method in which relatively short short fibers are sent to a perforated drum and dispersed by air to form a web. After the web is formed, the structure may be fixed by an entanglement / heat treatment step, but the wet papermaking method is preferred.

  In addition, when performing the said high-pressure water flow, a sheet | seat may be a single body and you may laminate | stack two or more sheets which mutually differ in raw cotton composition. Moreover, when performing the said high pressure water flow, you may laminate | stack the said sheet | seat and another fabric. At that time, as the fabric, a woven or knitted fabric made of polyester fiber or a nonwoven fabric is preferable.

Next, if necessary, the nonwoven fabric of the present invention is obtained by dissolving and removing the sea components of the sea-island composite fibers by performing alkali weight reduction processing as described above.
In the thus obtained flexible nonwoven fabric, it is preferable that the ultrafine polyester fiber A is exposed on at least one surface of the nonwoven fabric. When the ultra fine polyester fiber A is not exposed, the wet dynamic friction coefficient may not be obtained.

  Moreover, it is preferable that the tensile strength of a nonwoven fabric is 10 N / 5cm or more. However, the tensile strength is measured in the warp direction and the horizontal direction of the nonwoven fabric according to JIS L1096 (General Textile Testing Method), and the average value is obtained. Such tensile strength can be obtained by appropriately optimizing within the above range.

Since the nonwoven fabric of the present invention has a specific wet dynamic friction coefficient and wet bending resistance, it has excellent adhesion to the skin and handleability, and is particularly suitably used for cosmetic products.
The nonwoven fabric of the present invention may be appropriately subjected to conventional dyeing processing, calendering processing, embossing processing, hydrophilic processing, water repellency processing, and the like as necessary.

Next, the cosmetic product of the present invention is a cosmetic product (beauty product or cosmetic product) containing the cosmetic liquid (such as lotion or cosmetic liquid) using the above-mentioned nonwoven fabric for cosmetic products. Such cosmetic products include products used by being applied to face masks (face packs), eye sheets, necks, elbows, heels, and the like.
Since this cosmetic product uses the above-mentioned nonwoven fabric for cosmetic products, it is excellent in adhesion to the skin and handleability.

  Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.

(1) Melt Viscosity The polymer after drying treatment is set in an orifice set at the melter melting temperature at the time of spinning, melted and held for 5 minutes, and then extruded with several levels of load. The shear rate and melt viscosity at that time are determined. Plot. The plot was gently connected to create a shear rate-melt viscosity curve, and the melt viscosity when the shear rate was 1000 seconds ^-1 was observed.

(2) Dissolution rate measurement Obtained by discharging the sea component and island component polymers from a die having a diameter of 0.3 mm and a length of 0.6 mm from a nozzle having 24 holes, and spinning at a spinning speed of 1000 to 2000 m / min. The undrawn yarn was drawn so that the residual elongation was in the range of 30 to 60% to prepare a multifilament of 83 dtex / 24 filament. Using this as a bath ratio of 100 at a predetermined solvent and dissolution temperature, the rate of weight loss was calculated from the dissolution time and the dissolution amount.

(3) Measurement with Island Diameter A transmission electron microscope TEM was used to take and measure a fiber cross-sectional photograph at a magnification of 30000 times. Depending on the TEM machine, the length measurement function is used for measurement, and for a TEM that does not exist, the photograph taken may be enlarged and copied with a ruler after taking the scale into consideration. However, the diameter of the circumscribed circle in the fiber cross section was used as the fiber diameter (average value of n number 5).

(4) Fiber length Using a scanning electron microscope (SEM), the ultrafine short fibers before being dissolved and removed from the sea component were placed on the base and measured at 20 to 500 times. Measurement was performed by utilizing the length measurement function of SEM (average value of n number 5).

(5) Tensile strength Tensile strength (N / 5 cm) was measured based on JIS L1096 (general fabric test method).

(6) Weight per unit area Measured based on JIS P8124 (Measuring basis weight of paper).

(7) Thickness Measured based on JIS P8118 (Test method for thickness and density of paper and paperboard).

(8) Density The density was measured based on JIS P8118 (Testing method for thickness and density of paper and paperboard).

(9) Bending softness The vertical direction (longitudinal direction) was measured by the JIS L1096 6.19.1A method (45 ° cantilever method).
The wet bending resistance was measured immediately after the sample was immersed in water at a temperature of 20 ° C. and then suspended for 10 minutes in an environment at a temperature of 20 ° C. and a relative humidity of 65%. On the other hand, the dry bending resistance was measured immediately after being left for 1 week in an environment of a temperature of 20 ° C. and a relative humidity of 65%.

(10) Coefficient of dynamic friction A sample of 10 cm × 5 cm is attached under the head (136 g), placed on a silicon rubber (pseudo-skin) laid on a smooth base, and the head is moved at a constant speed (10 cm / min). The resistance value (F) when moved by 10 cm or more was measured and recorded with a U gauge. (Average of n number 5) The sample was measured in the vertical direction (longitudinal direction). The dynamic friction coefficient was obtained from the following equation.
Coefficient of dynamic friction (μ) = U gauge reading (F) / Head and specimen load (R)
The wet dynamic friction coefficient was measured immediately after the sample was immersed in water at a temperature of 20 ° C. and then suspended for 10 minutes in an environment at a temperature of 20 ° C. and a relative humidity of 65%. On the other hand, the dry friction coefficient was measured immediately after being left for 1 week in an environment of a temperature of 20 ° C. and a relative humidity of 65%.

(11) Adhesiveness to the skin After the sample was cut out in the shape of a face, a commercial lotion was moistened with 500% by weight with respect to the sample weight, and the three testers had a third-level adhesiveness to the skin: It was evaluated in three grades: excellent, second grade: normal, first grade: inferior.

(12) Handleability After cutting the sample into the shape of a face, commercial skin lotion is hydrated by 500% by weight with respect to the sample weight. It was evaluated in three grades: excellent, second grade: normal, first grade: inferior.

[Example 1]
Polyethylene terephthalate with a melt viscosity at 285 ° C. of 120 Pa · sec as the island component, polyethylene glycol with an average molecular weight of 4000 with a melt viscosity at 285 ° C. of 135 Pa · sec as the sea component, 4% by weight of 5-sodium sulfoisophthalic acid Using 9 mol% copolymerized modified polyethylene terephthalate, spinning was performed using a die having a number of islands of 400 at a weight ratio of sea: island = 10: 90, and taken up at a spinning speed of 1500 m / min. The alkali weight loss rate ratio between the sea component and the island component was 1000 times. This was stretched 3.9 times and then reduced by 25% with a 4% NaOH aqueous solution at 75 ° C., and it was confirmed that ultrafine fibers having a relatively uniform fiber diameter were formed, and the fibers were used as a guillotine cutter. And cut to 1 mm to obtain ultrafine short fibers. This fiber was designated as ultra-fine polyester fiber A (single fiber diameter (D) was 700 nm, fiber length (L) was 1000000 nm, and L / D was 1429).
On the other hand, as a base cotton (organic fiber B), polyethylene terephthalate fiber (single fiber fineness 0.1 dtex, fiber length 5 mm, single fiber diameter 3.2 μm) and rayon fiber (single fiber fineness 0.8 dtex, fiber length 7 mm, A single fiber diameter of 8.7 μm) was used.

Next, the ultrafine polyester fiber A, the polyethylene terephthalate fiber, and the rayon fiber were mixed and stirred in this order at a weight ratio of 10:50:40, and then TAPPI (square sheet machine manufactured by Kumagai Ri Industry Co., Ltd., trade name) Paper is made with a basis weight of 60 g / m ² , placed on a 150-mesh metal mesh, and entangled with a water needle tester (nozzle 0.1 mmΦ, 2-row zigzag, water pressure 130 kg / cm ² , speed 2 m / min) After the treatment (once each of the front and back surfaces), a drying treatment was performed with an air-through dryer to obtain a non-woven fabric for cosmetic products. In the nonwoven fabric, the ultra fine polyester fiber A was exposed on both sides. Table 1 shows the physical properties of the obtained nonwoven fabric. In addition, the sticking property to the skin and the handleability were both third grade and excellent.
Next, when the face mask (cosmetic product) was obtained by impregnating the cosmetic liquid using the nonwoven fabric, both the sticking property to the skin and the handleability were excellent.

[Example 2]
In Example 1, it carried out similarly to Example 1 except mixing and stirring the said ultra-fine polyester fiber A, the said polyethylene terephthalate fiber, and the said rayon fiber by the weight ratio of 20:50:30 in this order. In the nonwoven fabric, the ultra fine polyester fiber A was exposed on both sides. Table 1 shows the physical properties of the obtained nonwoven fabric. In addition, the sticking property to the skin and the handleability were both third grade and excellent.

[Example 3]
In Example 1, a two-layer structure is used, with one side having a basis weight of 30 g / m ² at the same ratio as Example 1, the other side having the same rayon fiber 100% and basis weight of 30 g / m ² as used in Example 1, The nonwoven fabric which gave the entanglement process as a product was obtained. In the nonwoven fabric, the ultra fine polyester fiber A was exposed only on one side. Table 1 shows the physical properties of the obtained nonwoven fabric. The dynamic friction coefficient was measured on one side where the ultra fine polyester fiber A was exposed. In addition, the sticking property to the skin and the handleability were both third grade and excellent. In addition, it used so that the single side | surface which the ultra-fine polyester fiber A exposed may be located in the skin side. In addition, the sticking property to the skin and the handleability were both third grade and excellent.

[Comparative Example 1]
Example 1 was the same as Example 1 except that the basis weight was 20 g / m ² . The obtained nonwoven fabric properties are shown in Table 1. Moreover, the sticking property to the skin was grade 3, and the handleability was grade 1.

[Comparative Example 2]
Example 1 was the same as Example 1 except that the basis weight was 150 g / m ² . The obtained nonwoven fabric properties are shown in Table 1. Moreover, the sticking property to the skin was grade 2, and the handleability was grade 3.

[Comparative Example 3]
Example 1 was the same as Example 1 except that only polyethylene terephthalate fibers (single fiber fineness 0.1 dtex, fiber length 5 mm, single fiber diameter 3.2 μm) were used as the nonwoven fabric composition. Table 1 shows the physical properties of the obtained nonwoven fabric. Moreover, the sticking property to the skin was grade 2, and the handleability was grade 3.

[Comparative Example 4]
In Example 1, it was carried out similarly to Example 1 except using only a rayon fiber (single fiber fineness 0.8dtex, fiber length 7mm, single fiber diameter 8.7 micrometers) as a nonwoven fabric composition. Table 1 shows the physical properties of the obtained nonwoven fabric. Moreover, the sticking property to the skin was grade 1, and the handleability was grade 2.

[Comparative Example 5]
In Example 1, it was carried out similarly to Example 1 except using only a cotton fiber (single fiber fineness 1.2dtex, fiber length 7mm, single fiber diameter 10.5micrometer) as a nonwoven fabric composition. Table 1 shows the physical properties of the obtained nonwoven fabric. Moreover, the sticking property to the skin was grade 2, and the handleability was grade 3.

  ADVANTAGE OF THE INVENTION According to this invention, the cosmetics nonwoven fabric excellent in the sticking property to skin and the handleability, and the cosmetics product using this nonwoven fabric are provided, The industrial value is very large.

Claims (7)

A cosmetic product non-woven fabric having a basis weight of 30 to 100 g / m ² , having a wet dynamic friction coefficient of 2.0 or more and a wet bending resistance of 1 to 5 cm. Non-woven fabric.
However, the wet dynamic friction coefficient and the wet bending resistance are measured after the sample is immersed in water at a temperature of 20 ° C. and then suspended for 10 minutes in an environment at a temperature of 20 ° C. and a relative humidity of 65%.   An ultrafine polyester fiber A made of polyester and having a single fiber diameter (D) of 500 to 1000 nm and a ratio (L / D) of the fiber length (L) nm to the single fiber diameter (D) nm of 600 to 3000; The cosmetic product according to claim 1, wherein the organic fiber B having a single fiber fineness of 0.05 to 1.0 dtex and a fiber length of 3 to 20 mm is contained in a weight ratio of 1/99 to 50/50 of the former / the latter. Nonwoven fabric.   The ultra-fine polyester fiber A is made of polyester and subjected to alkali weight reduction processing on a composite fiber having an island component having an island diameter (D) of 500 to 1000 nm and a sea component made of an aqueous polymer that is more easily soluble in alkali solution than the polyester. The nonwoven fabric for cosmetic products according to claim 2, wherein the sea component is dissolved and removed by applying.   The nonwoven fabric for cosmetic products according to claim 2 or 3, wherein the ultrafine polyester fiber A is exposed on at least one surface of the nonwoven fabric.   The non-woven fabric for cosmetic products according to any one of claims 1 to 4, wherein the non-woven fabric is a non-woven fabric in which fibers are entangled with each other by a high-pressure water stream after a sheet is formed by a wet papermaking method.   The nonwoven fabric for cosmetic products according to any one of claims 1 to 5, wherein the nonwoven fabric has a tensile strength of 10 N / 5 cm or more.   A cosmetic product comprising the cosmetic liquid comprising the non-woven fabric for cosmetic product according to any one of claims 1 to 6.