KR20080037049A - Skincare Tool and Manufacturing Method Thereof - Google Patents

Abstract

An object of the present invention is to provide a skin care tool which is excellent in hypoallergenicity to the skin and excellent in removing the dirt in the pores. That is, the present invention is a skin care tool comprising a pile yarn made of a thermoplastic polymer and nanofibers having a single fiber fineness of 1 × 10 ⁻⁸ to 2.2 × 10 ⁻³ dtex by a number average, and a pile fabric composed of a grand yarn. to be.

Description

Skin care tool and manufacturing method thereof {SKIN CARE IMPLEMENT AND METHOD FOR MANUFACTURE THEREOF}

The present invention relates to a skin care tool consisting of nanofibers. The skin care referred to in the present invention refers to "cleaning and caring for the skin" of the whole body, and the skin care tool refers to the overall tool used therefor.

In face-washing, it is very important to effectively remove cosmetic residues and waste products such as sebum from the viewpoint of maintaining and promoting the health of the skin and prevention of acne and rashes. However, it is difficult to remove what is in skin texture or pores by normal face-wash. In addition, the "immortal cosmetics" and "immortal sunblocks" developed by recent advances in formulation technology have improved durability and effectiveness, but have a problem of how to cleanly remove them during face wash and cleansing. Various cleansing agents for these cosmetics have been devised, but even with oil-based cleansing, which is the highest cleaning power, cosmetics and sebum dirt filled with pores cannot be removed. In addition, recent cosmetics have been released on the market not only for the face, but also for making the whole body look beautiful, especially the feet and the chest, and these also suffer from such problems.

On the other hand, it is generally known to use a skin care tool using an ultrafine fiber in part when washing with water as a means for enhancing the cleaning effect.

For example, a skin care tool using ultrafine fibers having a fineness of 0.001 to 1 dtex is disclosed (for example, Patent Document 1).

However, this exerts a cleaning effect by the dense foam formed by passing soap through the micro-gap of the ultrafine fibers (see Patent Document 1, Paragraph No. 0020). Insufficient to remove.

Moreover, the skin care tool which removes a dirt and dead skin with micro fine fiber of fineness 0.001-1 dtex is disclosed (for example, patent document 2, 3). However, microfibers with a fineness of 0.001 to 1 dtex are in direct contact with the skin to remove dirt and dead skin cells, and the skin is excessively irritated and rubbed to cause pigmentation or keratin thickening, and in some cases, such as trichophytosis. It is concerned about causing trouble.

That is, the skin care tool which is excellent in the hypoallergenicity to skin and excellent in the removal effect of the dirt in a pore has not been provided yet, and the rapid development is requested | required.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-332149

Patent Document 2: Japanese Patent Laid-Open No. 2004-329628

Patent Document 3: Japanese Utility Model Model 3100954

Patent Document 4: Japanese Patent Application Laid-Open No. 2005-330637

SUMMARY OF THE INVENTION The present invention has been achieved in view of solving the problems in the prior art in view of the above situation, and provides a skin care tool excellent in hypoallergenicity to skin and excellent in removing skin texture and dirt in pores. The purpose is to.

Composition and Action of the Invention

MEANS TO SOLVE THE PROBLEM This invention has the following structures in order to solve the said subject.

1. A skin care tool comprising a pile yarn made of nanofibers made of a thermoplastic polymer and having short fiber fineness according to a number average of 1 × 10 ^-8 to 2.2 × 10 ^-3 dtex, and a pile fabric composed of a grand yarn.

2. The skincare article according to 1 above, wherein the thermoplastic polymer is nylon.

3. The skin care implement according to 1 or 2 above, wherein the single fiber fineness by the number average of the nanofibers is 4 × 10 ⁻⁴ dtex or less.

4. The skincare article according to any one of 1 to 3 above, wherein the pile yarn is made of nanofiber bundles.

5. The skin care appliance according to any one of 1 to 4, wherein the short fiber fineness of the grand yarn exceeds 8 × 10 ⁻⁴ dtex.

6. The skin care implement according to any one of 1 to 5, wherein the grand fiber short fiber fineness is 1 × 10 ⁻¹ dtex or more.

7. Skincare article according to any of the above 1 to 6, wherein the length of the pile is in the range of 1 to 10 mm.

8. Skincare article according to any of the above 1 to 7, wherein the length of the pile is in the range of 2 to 5 mm.

9. The skin care implement according to any one of 1 to 8, wherein the tip of the pile yarn is cut.

10. The skincare tool according to any one of 1 to 9, wherein the skin care implement has a sheet shape and the pile protrudes on both sides of the sheet shape.

11. The skin care implement according to 10 above, wherein the pile fabric having the pile protruding from the pile is laminated.

12. A pile fabric having a polymer alloy fiber composed of a sea component and an island component as a pile yarn is treated with a liquid in which the sea component is dissolved but not the grand yarn, and the single fiber fineness according to the number average is 1 × 10 ^−. A method for producing a skin care article according to any one of 1 to 11 above, including a step of generating nanofibers of ⁸ to 2.2 × 10 ⁻³ dtex.

Effect of the Invention

According to the present invention, as described below, not only the surface of the skin but also the removal effect is not only high on the cracks or pores of the skin, but also on the skin, a skin care tool having excellent hypoallergenicity can be obtained. In addition, the skin care equipment composed of the nanofiber of the present invention can provide a good feeling to the user. In addition, the skin care tool of the present invention is superior in form stability and texture and has a good feeling to use compared to cloth composed of only nanofibers.

BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional schematic diagram which shows an example of the fabric or knitted fabric which comprises the skin care tool of this invention.

2 is a TEM photograph showing a cross section of a polymer alloy fiber which is a precursor of nanofibers.

3 is a SEM image of the surface of a bundle of nylon 6 nanofibers.

4 is a SEM image of the surface of the nylon 6 nanofiber bundle when the water absorbs water and swells.

Fig. 5 is a cross-sectional photomicrograph of a pile yarn made of nylon 6 nanofiber bundles in close contact with similar skin (cowhide).

FIG. 6 is a SEM photograph showing a state in which pile yarns consisting of nylon 6 nanofiber bundles are collected. Dirty foreign matter collected in the garden is recognized.

Fig. 7 is a schematic diagram showing a state in which a bundle of nanofibers absorbs water, swells, deforms by force, and collects and removes the dirt filled in pores.

It is a schematic diagram which shows the comparison of the (a) cut pile and (b) loop pile of the pile yarn which consists of a nanofiber bundle.

<Brief description of symbols for the main parts of the drawings>

1: loop pile yarn

2: grand company

3: cut pile yarn

4: cowhide

5: pile yarn made of nanofibers

6: Nanofiber bundle at the time of drying

7: Nano fiber bundle at the time of swelling

8: Nanofiber bundle at deformation

9: skin

10: dirty foreign objects

11: Grand of the file fabric

12: Island (domain)

13: sea (matrix)

Best Mode for Carrying Out the Invention

Polyester, polyamide, polyolefin, polyphenylene sulfide (PPS) and the like may be employed as the thermoplastic polymer for forming nanofibers of the pile yarn in the skin care tool of the present invention. Especially, in maintaining the nanofiber bundle shape mentioned later, polyamide, such as nylon 6 which has a strong hydrogen bond, is preferable.

In the skin care tool of the present invention, it is important that the pile yarn is made of nanofibers. By employing the nanofibers, unlike skin care products composed of conventional ultrafine fibers (microfibers), the nanofibers easily enter into the gaps and pores of the skin, thereby making it easy to remove dirt. This is because not only the fiber diameter of the nanofibers is thin, but also the nanofibers have a cross-sectional secondary moment, which is an index of the fiber's ease of deformation, as small as 1.Ox10 ^-32 to 2.5x10 ^-3 times that of the conventional microfine fibers. Abundant flexibility is considered a factor. As a result, when the pile yarn contacts the skin, the nanofibers forming the pile yarn are easily deformed and dispersed, and adhere to the gaps or pores of the skin without gaps, thereby removing fine dirt (see FIG. 5).

In addition, the stress applied to the skin is easily dispersed, so that irritation and friction on the skin can be made very small, and expansion of the pores can be prevented.

In addition, the nanofibers enable the production of dense bubbles having a diameter of 1 × 10 ¹ μm or less, and the dense bubbles can adsorb dirt in pores. This is more dense than the foam obtained from the conventional ultrafine fibers reported in Patent Document 3 and the like.

On the other hand, in the conventional ultrafine fibers, because of the thickness of the single fiber fineness, a sufficient number cannot be inserted into the gaps and pores of the skin. In addition, since the bundle as described later cannot be formed, it cannot be deformed depending on the shape of the gaps or pores of the skin, and it is impossible to collect fine dirts. In addition, microfibers that cannot be deformed can cause stress concentrations in the skin, damaging the stratum corneum or excessive friction on the skin.

The thickness of the nanofibers is 1 × 10 ⁻⁸ to 2.2 × 10 ⁻³ dtex (in the case of nylon 6, which corresponds to 1 to 500 nm in short fiber diameter) with single fiber fineness by the number average, and preferably 4 × 10 ⁻⁴ dtex or less (211 nm for short fiber diameter for nylon 6 with a density of 1.14 g / cm 3), more preferably 2 × 10 ⁻⁴ dtex or less (149 for short fiber diameter for nylon 6) nm or less), more preferably 1 × 10 ⁻⁴ dtex or less (in the case of nylon 6, 106 nm or less in short fiber diameter), and more preferably 8 × 10 ⁻⁶ to 6 × 10 ⁻⁵ dtex (of nylon 6 In the case of short fibers 30 to 82 nm). By making short fiber fineness by the number average of nanofibers into 2.2x10 <^-3> dtex or less, the nanofiber can easily enter into the cracks and pores of skin, and the effect which becomes easy to remove a dirt can be exhibited. On the other hand, if it is less than 1x10 <^-8> dtex, the intensity | strength of a nanofiber and also pile yarn will fall.

It is preferable that a plurality of nanofibers aggregate to form a bundle when dried. The nanofiber bundles swell when the liquid is absorbed (see Fig. 4), and when the skin contacts the skin, the bundles are crushed, and the nanofibers on the surface deform and disperse along the shape of the gaps and pores of the skin. In doing so, the nanofibers are deformed and dispersed, and at the same time, a large dirt is broken and collected in the nanofiber bundles. In addition, fine dirt in the gaps or pores of the skin is collected in the bundle when the dispersed nanofibers adhere to the gaps or pores of the skin without gaps (see FIGS. 6 and 7). The removed dirt can be collected in a bundle of nanofibers, preventing it from reattaching to the skin.

As the method for obtaining the nanofibers, the following method can be adopted, for example.

In other words, from two or more kinds of polymers having different solubility in a solvent, the soluble polymer is used as a polymer alloy melt having a sea (matrix) and a poorly soluble polymer as an island, and after spinning, Cool and solidify to fiber. And after extending | stretching and heat-processing as needed and obtaining a polymer alloy fiber, nanofiber can be obtained by removing a water-soluble polymer preferably 99.9% or more with a solvent.

In this method, the diameter of the nanofibers is almost determined by the size of the islands (domains) in the polymer alloy fibers, which are precursors of the nanofibers.

Control of the size of the island (domain) can be carried out by controlling the kneading of the polymer, and high kneading by the kneading extruder, the stationary kneading machine or the like is preferable.

The combination of the polymers also affects the size of the island (domain). In order to bring the island (domain) closer to a circle, it is preferable that the island (domain) polymer and the sea (matrix) polymer are incompatible with each other. However, it is difficult to sufficiently ultra-disperse the island (domain) polymer with a simple combination of incompatible polymers. Therefore, the combination of polymers can select the solubility parameter (SP value) as an index. SP value is a parameter which reflects the cohesion force of the substance defined by (evaporation energy / molar volume) ^1/2 . When the difference of SP value of two polymers is 1-9 (MJ / m <^3> ) ^1/2 , it is preferable to make circularization of an island (domain) by incompatibility compatible with ultrafine oxidation easily. For example, the difference in SP value between nylon 6 (N6) and polyethylene terephthalate (PET) is about 6 (MJ / m ³ ) ^1/2 , but the difference in SP value between 11 and polyethylene (PE) is 11 ( MJ / m ³ ) ^1/2 is an example that is not preferred.

Melt viscosity also affects the size of the island (domain). When the melt viscosity of the polymer forming the island component is set lower than the melt viscosity of the sea component, the island component polymer is easily deformed due to the shear force, and thus, microdispersion of the island component polymer is likely to proceed, and from the viewpoint of nanofiberization desirable. However, when the island component polymer is excessively low in viscosity, it becomes easy to denature and the blend ratio for the whole fiber cannot be increased. Therefore, the viscosity of the island component polymer is preferably 1/10 or more of the viscosity of the sea component polymer. .

As a solvent which melt | dissolves a sea (matrix) polymer and is hard to melt an island (domain) polymer, an alkaline solution, an acidic solution, an organic solvent, a supercritical fluid, etc. are mentioned. For example, in the combination of nylon and polyester, nylon shows poor solubility with respect to an alkaline solution, and polyester shows usability.

In the skin care tool of the present invention, the Grand company constituting the pile fabric may be synthetic fiber or natural fiber. However, when the polymer alloy fiber is used as the pile yarn and the pile fabric is prepared, the deoiling treatment is performed. The material which does not melt | dissolve in a desorption process is preferable, and it is preferable that it is the same material as the nanofiber used for a pile from a viewpoint of designability, a touch, and the touch at the time of use.

Moreover, it is preferable that the water absorptivity or oil absorption is equal to or less than the water absorptivity or oil absorption of the nanofibers which comprise a pile yarn. By doing so, an aqueous or oily cleansing agent or face wash can be efficiently held in a pile yarn made of nanofibers used as a wiping layer for skin.

It is preferable to exceed ^{8x10 <-4>} as a single fiber fineness of Grand Corporation, More preferably, it is 1x10 <^-1> dtex or more. By employing such a grand yarn, the shape stability and the texture can be improved without impairing the removal performance of the nanofibers.

As the form of the pile fabric, a woven fabric or a knitted fabric can be employed. As a specific example of a knitted fabric, a cyclic knitted fabric, a tricot knitted fabric, a double-lasel knitted fabric, etc. are mentioned.

The length of the pile in the pile fabric is preferably in the range of 1 to 10 mm, more preferably in the range of 2 to 5 mm. By setting it as 1 mm or more, softness can be provided to the pile yarn which consists of nanofibers, and favorable removability and the pleasant touch at the time of wet can be obtained. Moreover, by setting it as 10 mm or less, it can prevent that a pile yarn lays and a touch falls.

In the skin care tool of the present invention, it is preferable that the tip of a pile yarn made of nanofibers is cut from a pile fabric. By doing so, the degree of freedom of the nanofibers in the pile yarn is improved, and since the tip of the nanofibers easily enters the fine pores and the skin texture, the removal effect can be enhanced. In addition, the stress applied to the skin during wiping can be further dispersed, and a pleasant touch when wet can be obtained (see FIG. 8).

In addition, in the case of using a fine fiber of the same size as a conventional microfiber for a pile yarn, cutting the tip of the pile yarn could cause the tip of the fiber to touch the skin and give an undesired irritation to the skin. Accordingly, cutting the tip of the pile yarn in the skin care tool can be said to have been practically conceived for the first time by the adoption of nanofibers.

As a form of the skin care tool of this invention, a towel, mittens, gloves, thimble, etc. can be employ | adopted. Towels are preferable in that the usage can be adjusted according to the user's preference. Moreover, in the point which it is easy to hold | maintain, it is preferable that it is a shape which covers a hand and a finger | tips, such as mitten, gloves, thimble.

Moreover, it is also a preferable aspect of the skin care tool of this invention that it has a sheet shape, and a file protrudes on both surfaces of the said sheet shape. By protruding the pile made of nanofibers on both sides of the sheet shape, the user can use the skin care equipment of the present invention without being conscious of the front and back, and can improve the ease of use and usability. In the aspect of obtaining the form, a pile can be directly applied to both sides of the pile fabric. However, from the viewpoint of obtaining a high pile density, a pile fabric having a pile projecting from one pile is preferably laminated. As a method of laminating and fixing the pile fabric, a method of sewing an end portion, a method of adhering with an adhesive such as urethane, or the like can be adopted.

Moreover, from the viewpoint of better foam manufacture of face wash, you may use together media, such as a net which accelerates foam manufacture of face wash.

It is also preferable that the cushion material is coated with a pile fabric including a pile yarn made of nanofibers, and the shape may be a mitten or a glove.

Subsequently, in the method for producing a skin care tool of the present invention, a pile fabric having a polymer alloy fiber composed of a sea component and an island component as a pile yarn is treated with a liquid in which the sea component is dissolved but the grand yarn is not dissolved. It is characterized in that it comprises a step of generating a nanofiber having a single fiber fineness of 1 × 10 ^-8 to 2.2 × 10 ^-3 dtex. As described above, the method for depolymerizing the polymer alloy fibers is preferable as a method for expressing the nanofibers, but in the process of degreasing the grand yarn with a liquid which dissolves sea components but does not dissolve the grand yarn, in other words, By adopting a grand yarn that does not dissolve, it is possible to obtain a pile fabric having excellent usability without sagging even after desorption.

[How to measure]

(1) weight average molecular weight of polylactic acid

The sample was dissolved in chloroform, and tetrahydrofuran was mixed to make a measurement solution. This was measured at 25 degreeC using the Waters make gel permeation chromatography (GPC) Waters 2690, and the weight average molecular weight was calculated | required in polystyrene conversion.

(2) single fiber fineness by number average of nanofibers

Randomly pull five pile yarns in the range of 5 cm x 5 cm, extract ultra-segmented segments in the fiber cross-sectional direction of each pile yarn, and transmit a transmission electron microscope (TEM) (H-7100FA type magnification 100,000 times of Hitachi Seisakusho Co., Ltd.) The fiber cross section was observed.

From the fiber cross section by TEM, 300 or more randomly extracted in the same cross section are extracted using image processing software (WINROOF), the diameter of a single fiber of 1500 or more is measured, and the simple average value is calculated | required, and it is a nanofiber The short fiber diameter by the number average of was set.

The short fiber fineness was calculated and calculated | required from the short fiber diameter by the following formula.

Single fiber fineness (dtex) = by the number average ^{(d × D 2 × π /} 4) × 10 -8

Where d: specific gravity (g / cm 3), D: short fiber diameter (nm) by number average.

(3) removal evaluation A of the dirt

As a similar skin for evaluation, a foamed polyethylene sheet ("Trefe" registered product manufactured by Toray Corporation) was used. In contrast, a highly water-resistant cosmetic (Eye Liner Fluid manufactured by Shiseido Co., Ltd.) was applied in a circular shape having a diameter of 1 cm, and dried for 12 hours at 20 ± 2 ° C. and 65 ± 2% RH.

The test piece is cut out to 6 cm x 8 cm, and a cleansing agent (Kose Cosmeport Co., Ltd. white cleansing water) is impregnated with 2.6 times the mass of the test piece, and this is made of a silicone rubber plate (6 cm x length). 7 cm x thickness 1 cm).

The test piece was reciprocated five times with respect to the cosmetic application part of the similar skin at a pressure of 0.5 cN / mm ² (300 g / 2.5 cm 2), at a speed of 2 cm / s, and at a removal width of 2 cm to perform a removal operation. The degree of dirt cleansing after the removal operation was visually observed and evaluated in the following five steps.

5: The dirt between similar skin textures also fell.

4: The dirt of similar skin texture remained slightly.

3: The dirt of similar skin texture remained quite.

2: Dirt and partial dirt remained on the surface.

1: There were quite a few dirts on the similar skin texture and surface.

(4) removal evaluation B of dirt

0.5 cm * 2cm of cosmetics (the eyeliner fluid made from Shiseido) strong water resistance were apply | coated inside the arm, and it dried for 30 minutes under normal temperature and humidity.

The test piece is cut out to 6 cm in length x 8 cm in width, and a cleansing agent (Kose Cosmeport Co., Ltd. white cleansing water) is impregnated with 2.6 times the mass of the test piece, and a silicon rubber rod (approximately 8 mm in diameter) is used. It wound up and removed 10 times in the fixed direction with respect to the cosmetics application part of the arm.

The degree of cleansing of the dirt after the removal operation was observed under a microscope (Giens VH-6300C magnification 300 times), and evaluated in the following five steps.

5: All the dirts in the gaps and pores of skin fell.

4: There were some dirts in the cracks and pores of the skin.

3: Dirt in the cracks and pores of the skin remained.

2: The dirt remained partially in the gaps, pores of the skin, and the skin surface.

1: Dirt left on cracks, pores and the surface of the skin.

(5) hypoallergenic evaluation

As a similar skin for evaluation, an agar sheet made by dissolving agar (Sanada Pure Sun Agar) in water and cooling and solidifying was used.

The test piece is cut out to a length of 6 cm x 8 cm, and the water is impregnated with 2.6 times the mass of the test piece, wound up on a silicon rubber rod (about 8 mm in diameter), and in a predetermined direction with respect to the surface of the agar sheet. Ash removal operation was performed.

The degree of damage to the surface of the agar sheet after the removal operation was visually observed and evaluated in the following five steps.

5: Agar damage is inconspicuous.

4: The damage of agar is a little noticeable.

3: Agar damage is noticeable.

2: Agar damage is prominent, deep damage.

1: The damage of agar is noticeable, the number of damage is high, and the damage is deep.

(6) foam manufacturability evaluation

A 10 cm x 10 cm polyethylene net (8 mesh) was used as a medium for promoting foam production, and this was wrapped in a bag with a 15 cm x 15 cm test piece, and the inlet was connected with a cotton yarn to prepare a closed one.

A face wash solution (concentration 20 mass%, temperature 37 degreeC) was impregnated 0.3 times with respect to the test piece mass, and beaten 100 times with a pestle to make foaming. The surface shape of the obtained foam was observed with the microscope (Giens VH-6300C magnification 300 times).

(7) Monitor evaluation (for washing puff)

The test piece was cut out to 6 cm in length x 8 cm in width, and the cleansing agent (Corse Cosmeport Co., Ltd. white cleansing water) was impregnated 2.6 times with respect to the test piece mass.

Using this, makeup cleansing experiments were performed on 50 women in their 20s and 50s, and a questionnaire was conducted on the degree of cleansing, touch, low skin irritation, ease of use, and the like of the cosmetics.

(8) Monitor evaluation (for washing cloth use)

The test piece was cut out to 6 cm x 8 cm, rubbed face wash (Univer Japan Co., Ltd. product "Dove (trademark) Moisture Foam F"), and foamed.

Facial cleansing experiments were conducted on 50 women in their 20s and 50s using this, and a questionnaire was conducted on the degree of cleansing, touch, low skin irritation, and ease of use of the cosmetics.

Example 1

(Polymer Alloy Fiber)

Melt viscosity 212 Pa · s (262 ° C., shear rate 121.6 sec ⁻¹ ), nylon 6 (N6) (45 mass%) with melting point 220 ° C., weight average molecular weight 120,000, melt viscosity 30 Pa · s (240 ° C., Shear rate 2432 sec ^-1 ), poly L-lactic acid (55 mass%) with a melting point of 170 DEG C and an optical purity of 99.5% or more were individually weighed, individually fed into a twin screw extrusion kneader of the following specification, and melt kneaded at 220 DEG C. A polymer alloy chip was obtained.

Screw geometry: Fully occlusal double thread in the same direction

Screw: diameter 37 mm, effective length 1670 mm, L / D = 45.1

Kneading part length: It was located in the discharge side rather than 1/3 of the screw effective length.

Vent: 2 places.

The obtained polymer alloy chip was fed to a spinning machine, melted at 230 ° C, and the polymer alloy melt was filtered with a metal nonwoven fabric having a limit filtration diameter of 15 µm in a spin block having a spinning temperature of 230 ° C, and then a pore diameter of 0.3 mm and a pore length. Melt spinning was carried out from a mold of 0.55 mm and a surface temperature of 215 ° C. The discharged yarns were cooled and solidified over 1 m with a cooling air at 20 ° C., and then oiled with an oil supply guide installed 1.8 m downward from the detention, and turned at a speed of 3000 m / min, followed by a stretching temperature of 90 ° C. and stretching. It extended | stretched on condition of 1.5 times the magnification and the heat setting temperature of 130 degreeC.

The multifilament of the obtained polymer alloy fiber was 133 dtex, 48 filaments, the intensity 3.6 cN / dtex, the elongation 40%, and the Wooster unevenness 0.7%. In addition, the cross section of the obtained polymer alloy fiber was observed by TEM, and the poly-l-lactic acid had a sea-island structure in which the sea (matrix) and N6 were islands (domain), and the island (domain) had a diameter of 110 by number average. Ultrafine dispersion was carried out in nm.

(File company)

The multifilament of the polymer alloy fibers was used as pile yarns.

(Grand company)

Nylon 6 multifilament having a total fineness of 75 dtex and 24 filaments (short fiber fineness of 3.1 dtex) was used as the grand yarn.

(Part)

A multifilament of the polymer alloy fibers was used as a pile yarn, and a loop pile knitted with a pile length of 2.2 mm was produced using a single circular knitting machine with a sinker pile using the gland yarn.

(Skin care tool)

The pile knitted fabric was immersed in a 1% aqueous sodium hydroxide solution at a temperature of 98 ° C. and a bath ratio of 1: 100 for 1 hour to remove at least 99.9% of the polylactic acid in the polymer alloy fiber by hydrolysis to remove N6 nanofibers. The skin care tool which consists of a pile fabric comprised of the pile yarn which consists of a bundle, and the grand yarn which consists of N6 multifilaments was obtained.

The nanofiber of N6 has a fineness distribution in the range of 1 × 10 ^-8 to 4 × 10 ^-4 dtex in 1500 samples of the above measurement (1), and has a single fiber fineness of 1 × 10 ^-4 dtex by the number average. It was.

In the removal evaluation of the dirt about the obtained skin care tool, favorable results were obtained in each of A and B. FIG. Also, hypoallergenicity was very low in stimulation. In the monitor evaluation, good results were obtained for each item. In addition, in the bubble manufacturability evaluation, the formation of dense bubbles having a diameter of 10 m or less was observed.

Example 2

(Polymer Alloy Fiber)

Multifilaments of the same polymer alloy fibers as in Example 1 were prepared.

(File company)

Multifilaments of the polymer alloy fibers were used as pile yarns.

(Grand company)

The same thing as used in Example 1 was used as the grand company.

(Part)

Using the pile yarn and the grand yarn, a pile knitted fabric was produced in the same manner as in Example 1.

(Skin care tool)

After the same desalination treatment as in Example 1 was performed on the pile knitted fabric, the tip of the loop pile was cut by raising by emery processing to obtain a skin care tool.

With respect to the obtained skin care tool, favorable results were obtained in each of A and B in the removal evaluation of the dirt. In addition, good results were obtained in the hypoallergenicity evaluation that little damage occurred on the surface. In the monitor evaluation, good results were obtained for each item. In particular, since the tip of the pile yarn was cut off, many positive answers were obtained with respect to the skin texture compared with Example 1. In addition, in the bubble manufacturability evaluation, the formation of dense bubbles having a diameter of 10 m or less was observed.

Example 3

(Polymer Alloy Fiber)

Multifilaments of the same polymer alloy fibers as in Example 1 were prepared.

(File company)

Multifilaments of the polymer alloy fibers were used as pile yarns.

(Grand company)

Nylon 6 multifilament having a total fineness of 110 dtex and 24 filaments (short fiber fineness of 4.6 dtex) was used as the grand yarn.

(Part)

A pile knitted fabric was prepared in the same manner as in Example 1 except for using the grand yarn.

(Skin care tool)

The desalting treatment in Example 1 was performed on the pile knitted fabric to obtain a skin care tool.

The nanofiber of N6 has a fineness distribution in the range of 1 × 10 ⁻⁸ to 4 × 10 ⁻⁴ dtex in 1500 samples of the above measurement (1), and has a single fiber fineness of 1 × 10 ⁻⁴ dtex by the number average. It was.

With respect to the obtained skin care tool, favorable results were obtained in each of A and B in the removal evaluation of the dirt. Also, hypoallergenicity was very low in stimulation. In the monitor evaluation, good results were obtained for each item. In particular, since the short fiber fineness of Grand Corporation was thicker and stronger than the skin care equipment manufactured in Example 1, form stability was good and many positive answers were obtained regarding the ease of use. In addition, in the bubble manufacturability evaluation, the formation of dense bubbles having a diameter of 10 m or less was observed.

Example 4

(Polymer Alloy Fiber)

Multifilaments of the same polymer alloy fibers as in Example 1 were prepared.

(File company)

The multifilament of the polymer alloy fibers was used as pile yarns.

(Grand company)

Nylon 6 multifilament having a total fineness of 110 dtex and 24 filaments (short fiber fineness of 4.6 dtex) was used as the grand yarn.

(Part)

Using the pile yarn and the grand yarn, a pile knitted fabric was produced in the same manner as in Example 1.

(Skin care tool)

The same denitration treatment as in Example 1 was performed on the pile knitted fabric (the same as in Example 3 so far). Thereafter, the tip of the loop pile was cut by raising by emery processing to obtain a skin care tool.

In the removal evaluation of the dirt about the obtained skin care tool, favorable results were obtained in each of A and B. FIG. In addition, a good result was obtained that the damage to the surface hardly occurred in the hypoallergenic evaluation. In the monitor evaluation, good results were obtained for each item. In particular, since the tip of the pile yarn was cut off, many people answered that the skin texture was "very good" compared with Example 3. In addition, since the gland short fiber fineness was thick and strong compared with the skin care tool manufactured in Example 2, form stability was good and many positive answers regarding the ease of use were obtained. In addition, in the bubble manufacturability evaluation, the formation of dense bubbles having a diameter of 10 m or less was observed.

[Examples 5 and 6]

(Polymer Alloy Fiber)

Multifilaments of the same polymer alloy fibers as in Example 1 were prepared.

(File company)

The multifilament of the polymer alloy fibers was used as pile yarns.

(Grand company)

Nylon 6 multifilament having a total fineness of 110 dtex and 24 filaments (single fiber fineness of 4.6 dtex) was used as the grand yarn (as in Example 3).

(Part)

By using the pile yarn and the grand yarn, a double-lasel knit fabric having a thickness of 6.0 mm of the two layers constituting the knit fabric was manufactured by the double-lasel knitting machine. The double-lassel knitted fabric was sliced into two pieces at the portion where the file length became 1: 3 to obtain a cut pile knitted fabric having a pile length of 1.5 mm and a cut pile knitted fabric having a pile length of 4.5 mm.

(Skin care tool)

Each of the two kinds of pile knitted fabrics was subjected to the same decontamination treatment as in Example 1 to obtain a skin care tool. The thing of the Example 5 and the thing of the pile length 4.5mm are made into Example 6 with the pile length of 1.5 mm.

In any of Examples 5 and 6, the fineness distribution of N6 nanofibers was in the range of 1 × 10 ⁻⁸ to 4 × 10 ⁻⁴ dtex in 1500 sampling of the measurement (1), Short fiber fineness was 1 × 10 ⁻⁴ dtex.

With respect to the skin care implements of both of the obtained examples, satisfactory results were obtained for each of A and B in the removal evaluation of the dirt. In the hypoallergenicity evaluation, good results were obtained that both of the examples hardly caused damage upon removal. In the monitor evaluation, good results were obtained in each of the two examples. In particular, in Example 6, many positive answers were obtained with respect to the skin texture. In addition, in the foam manufacturability evaluation, the formation of dense bubbles having a diameter of 10 μm or less was observed.

EXAMPLES 7, 8

(Polymer Alloy Fiber)

Multifilaments of the same polymer alloy fibers as in Example 1 were prepared.

(File company)

The multifilament of the polymer alloy fibers was used as pile yarns.

(Grand company)

Nylon 6 multifilament having a total fineness of 110 dtex and 24 filaments (single fiber fineness of 4.6 dtex) was used as the grand yarn (as in Example 3).

(Part)

By using the pile yarn and the grand yarn, a double-lasel knitted fabric having a thickness of 6.0 mm having a two-layer spacing constituting the knitted fabric was produced. The double-lasel knitted fabric was sliced into two pieces at the portion where the file length became 5: 7 to obtain a cut pile knitted fabric having a pile length of 2.5 mm and a cut pile knitted fabric having a pile length of 3.5 mm.

In any of Examples 7 and 8, the fineness distribution of N6 nanofibers was in the range of 1 × 10 ⁻⁸ to 4 × 10 ⁻⁴ dtex in 1500 sampling of the measurement (1), Short fiber fineness was 1 × 10 ⁻⁴ dtex.

(Skin care tool)

Each of the two kinds of pile knitted fabrics was subjected to the same decontamination treatment as in Example 1 to obtain a skin care tool. Example 7 was used for the file having a pile length of 2.5 mm and Example 8 was used for the file having a pile length of 3.5 mm.

In the removal evaluation of the dirt about the skin care implements of both obtained examples, favorable results were obtained in each of A and B. In hypoallergenicity evaluation, good results were obtained in both examples. In the monitor evaluation, good results were obtained in each of the two examples. In particular, both examples have obtained many positive answers regarding the skin feel. In addition, in the bubble manufacturability evaluation, the formation of dense bubbles having a diameter of 10 m or less was observed.

Example 9

(Polymer Alloy Fiber)

Multifilaments of the same polymer alloy fibers as in Example 1 were prepared.

(File company)

The multifilament of the polymer alloy fibers was used as pile yarns.

(Grand company)

The same thing as used in Example 1 was used as the grand company.

(Part)

Using the pile yarn and the grand yarn, a pile knitted fabric was produced in the same manner as in Example 1.

(Skin care tool)

After carrying out the same desorption treatment as in Example 1 for the pile knitted fabric, the front end of the loop pile was cut by raising by emery processing to obtain a cut pile knitted fabric (as in Example 2 so far).

Two skin cuts obtained by cutting the obtained cut pile knitted with the size of the test piece in the above measurement, overlapping the grand slopes facing each other, sewing the ends with cotton yarn, and the pile protruding on both sides of the sheet shape Got.

In the removal evaluation of the dirt about the obtained skin care tool, favorable results were obtained in each of A and B. FIG. In hypoallergenicity evaluation, good results were obtained with little irritation upon removal. In the monitor evaluation, good results were obtained for each item. Moreover, since two sheets were laminated | stacked, the usability was also good and many positive answers regarding the usability were obtained. In addition, in the bubble manufacturability evaluation, the formation of dense bubbles having a diameter of 10 m or less was observed.

Example 10

(Polymer Alloy Fiber)

Multifilaments of the same polymer alloy fibers as in Example 1 were prepared.

(File company)

The multifilament of the polymer alloy fibers was used as pile yarns.

(Grand company)

The same thing as used in Example 1 was used as the grand company.

(Part)

Using the pile yarn and the grand yarn, a pile knitted fabric was produced in the same manner as in Example 1.

(Skin care tool)

After carrying out the same desorption treatment as in Example 1 for the pile knitted fabric, the tip of the loop pile was cut by raising by emery processing to obtain a cut pile knitted fabric (the same as in Example 2 so far).

Two obtained cut pile knits are prepared, these grand slopes overlap each other, and the urethane type adhesive (made by Dainippon Ink & Chemicals Co., Ltd., Typhos (registered trademark) 865HV) is about 4 g / in dots. It applied by the application amount of m <^2> , the grand slopes were adhere | attached, and the skin care tool in which the pile protruded on both sides of sheet form was obtained.

In the removal evaluation of the dirt about the obtained skin care tool, favorable results were obtained in each of A and B. FIG. In hypoallergenicity evaluation, good results were obtained with little irritation upon removal. In the monitor evaluation, good results were obtained for each item. Moreover, since two sheets were laminated | stacked, the usability was also good and many positive answers regarding the usability were obtained. In addition, the foam manufacturability evaluation confirmed the formation of dense foam having a diameter of 10 μm or less.

Comparative Example 1

Commercially-available microfiber washing cloth (short fiber fineness 0.22 dtex by Cosmo Co., Ltd. remove towel number average) was made into evaluation.

In the removal evaluation of the dirt, in each of A and B, it was inferior to the skin care tool of this invention. In addition, a strong scratch was recognized in the hypoallergenicity evaluation. Moreover, in monitor evaluation, the favorable result was not obtained compared with the skin care tool of this invention in each item. In foam evaluation, only the production of large bubbles having a diameter of about 100 μm to 1 mm could be confirmed.

Comparative Example 2

Commercially-available microfiber washing cloth (Freely Keratin Skilic Closure (trademark) manufactured by Lucky Corporation) was subjected to evaluation.

In the removal evaluation of the dirt, in each of A and B, the result was inferior to the skin care tool of this invention. In addition, a strong scratch was recognized in the hypoallergenicity evaluation. Moreover, in monitor evaluation, the favorable result was not obtained compared with the skin care tool of this invention in each item. In particular, many answered that skin irritation was strong and there was tingling after use. In foam evaluation, only the production of large bubbles having a diameter of about 100 μm to 1 mm could be confirmed.

Comparative Example 3

Commercially-available microfiber washing cloth (Toray Co., Ltd. "Tresy® face wash cloth", short-fiber fineness of 0.08 dtex by the number average) was subjected to evaluation.

When foam preparation evaluation was performed, the dense foam of 1-20 micrometers in diameter generate | occur | produced, but the size of foam was not uniform.

The skin care equipment of the present invention is very useful in the field of skin care equipment because of its excellent hypoallergenic effect on the skin and its excellent effect of removing dirt in the pores.

Claims (12)

A skin care tool comprising a pile yarn made of nanofibers made of a thermoplastic polymer and having short fiber fineness according to a number average of 1 × 10 ⁻⁸ to 2.2 × 10 ⁻³ dtex, and a pile fabric composed of a grand yarn. The skin care article of claim 1 wherein the thermoplastic polymer is nylon. The skin care implement according to claim 1, wherein the short fiber fineness by the number average of the nanofibers is 4 × 10 ⁻⁴ dtex or less. The skin care article of claim 1 wherein the pile yarn is comprised of nanofiber bundles. The skin care implement according to claim 1, wherein the monofilament fineness of the grand yarn exceeds 8 × 10 ⁻⁴ dtex. The skin care implement according to claim 1, wherein the single fiber fineness of the grand yarn is 1 × 10 ⁻¹ dtex or more. The skin care article of claim 1, wherein the length of the pile is in the range of 1 to 10 mm. The skin care article of claim 1, wherein the length of the pile is in the range of 2 to 5 mm. The skin care implement according to claim 1, wherein the tip of the pile yarn is cut. The skin care implement according to claim 1, wherein the skin care tool has a sheet shape and the pile protrudes on both sides of the sheet shape. The skin care implement according to claim 10, wherein the pile fabric having the pile protruding from the pile is laminated on one side thereof. A pile fabric having a polymer alloy fiber composed of a sea component and an island component as a pile yarn is treated with a liquid in which the sea component is dissolved but the grand yarn is not dissolved, and the short fiber fineness based on the number average is 1 × 10 ⁻⁸ to The manufacturing method of the skin care implement of Claim 1 including the process of generating the nanofiber which is 2.2 * 10 <^-3> dtex.

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