Cosmetic sheet

Abstract

To provide a skin toning sheet capable of not releasing at once but gradually releasing an impregnated skin toning lotion.SOLUTION: A skin toning sheet is constituted by impregnating a base cloth of the skin toning sheet with a skin toning lotion. The base cloth of the skin toning sheet has basis weight of 25-80 g / m2, and comprises an outer layer composed of a continuous fiber nonwoven cloth, and an inner layer composed of a group of hydrophilic short fibers. The group of short fibers is entangled with the continuous fiber nonwoven cloth to integrate. The continuous fiber nonwoven cloth comprises a group of polyolefin-based conjugate crimped continuous fibers where the continuous fibers are self-molten mutually, or may comprises a group of hydrophobic polyurethane continuous fibers where the polyurethane continuous fibers are bonded mutually by softening or melting the polypropylene continuous fibers. The base cloth of the skin toning sheet has a skin toning lotion total releasing rate from an external part of less than 50%, and a skin toning initial releasing rate of 50-70% when impregnating with six times the skin toning lotion to the basis weight.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a cosmetic sheet that gradually releases an impregnated lotion, and particularly to a cosmetic sheet such as a face mask or a cleansing sheet.

Background Art

[0002] Conventionally, non-woven fabric has been used as the base fabric of cosmetic sheets such as cleansing sheets. For example, Patent Document 1 proposes using a three-layer non-woven fabric in which the intermediate layer is made of a short fiber non-woven fabric composed of a group of thermoplastic synthetic short fibers and both outer layers are composed of a group of hydrophilic short fibers as a cleaning sheet. Then, this cleaning sheet is impregnated with a cleaning liquid and used to wipe and clean the body or the like. Since the outer layer of this cleaning sheet is formed of a group of hydrophilic short fibers, the impregnated cleaning liquid immediately migrates to the outer layer, enabling prompt wiping, which is preferable. However, in the application of a base fabric for a cosmetic sheet such as a cleansing sheet, there is a problem that much of the lotion, which is the cleaning liquid, is consumed by the first wiping, and it becomes impossible to wipe with the lotion after the second time, especially after the third time.

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a cosmetic sheet made of a non-woven fabric that does not immediately release the impregnated lotion but gradually releases it.

Means for Solving the Problems

[0005] The present invention solves the above problems by adopting a specific long fiber nonwoven fabric for the outer layer. That is, the present invention relates to a cosmetic sheet in which a base fabric of the cosmetic sheet is impregnated with a lotion solution, and the base fabric is composed of a group of hydrophobic crimped composite long fibers made of eccentric core-sheath type composite long fibers crimped in a spiral shape, and includes a portion where the hydrophobic crimped composite long fibers are bonded to each other by self-fusion, and has a bulk density of 0.01 to 0.08 g / cm 3 of the long fiber nonwoven fabric as the outer layer, or a long fiber nonwoven fabric composed of a group of hydrophobic stretchable long fibers and including a portion where the hydrophobic stretchable long fibers are bonded to each other by the fusion of hydrophobic heat-fusible long fibers as the outer layer, and an inner layer composed of a group of hydrophilic short fibers entangled with the long fiber nonwoven fabric, and is composed of a laminated long fiber nonwoven fabric with a basis weight of 25 to 80 g / m 2 When the base fabric is impregnated with 6 times the amount of lotion based on its basis weight, the total lotion release rate from the outer layer side is less than 50%, and the initial lotion release rate is 50 to 70%. The present invention relates to a cosmetic sheet characterized by this.

[0006] [Explanation of Terms in the Present Invention] In the present invention, the "outer layer" of the laminated long fiber nonwoven fabric refers to the layer that contacts the surface to which the liquid is applied, and the "inner layer" refers to the layer that does not contact this surface. Therefore, even if the laminated long fiber nonwoven fabric is a two-layer laminate, there are an outer layer and an inner layer. The "lotion" in the present invention contains arbutin as an active ingredient, and other ingredients such as sodium hyaluronate-2, hydrolyzed hyaluronic acid (nanonized hyaluronic acid), magnesium ascorbyl phosphate, vitamin E, yokukinin extract (job's tears extract), BG, concentrated glycerin, sorbitol solution, POP methyl glucoside, disodium succinate, succinic acid, VP-styrene copolymer emulsion, polyoxyethylene (20) sorbitan laurate, and parabens, and the balance is composed of water. Specifically, it is the product named "Hada Labo White Lotion Medicated Whitening Lotion" manufactured by Rohto Pharmaceutical Co., Ltd.

[0007] The "total lotion release rate from the outer layer side" and "initial lotion release rate" in the present invention are measured and calculated by the following procedure. (1) Prepare a laminated long fiber non-woven fabric with a length of 100 mm and a width of 150 mm. (2) Fold the laminated long fiber non-woven fabric in half horizontally with the inner layer facing inward to prepare a test piece with a length of 100 mm and a width of 75 mm. The outer layer is exposed on the front and back surfaces of this test piece. (3) Measure the weight of the test piece. Let the weight be x g. (4) Drop 6x g of lotion onto the test piece to obtain an impregnated test piece. The weight of this impregnated test piece is 7x g. (5) Place the impregnated test piece on an acrylic underlay board, place two pieces of filter paper (Advantec No. 2) of the same size on the impregnated test piece, and then place an acrylic plate of the same size on the filter paper. (6) Place a 500 g weight on the acrylic plate. (7) After standing for 5 seconds, remove the weight, acrylic plate, and filter paper, and measure the weight of the impregnated test piece. Let this weight be a g, and (7x - a) g is the liquid release amount for the first time. (8) Using the impregnated test piece in (7) above, perform the operations in (5) - (7) above, measure the weight of the impregnated test piece, and let this weight be b g. (7x - b) g is the liquid release amount for the second time. (9) Using the impregnated test piece in (8) above, perform the operations in (5) - (7) above, measure the weight of the impregnated test piece, and let this weight be c g. (7x - c) g is the liquid release amount for the third time. (10) Perform the above measurements, and the values calculated by the following formulas are the "total lotion release rate from the outer layer side" and the "initial lotion release rate". Total lotion release rate from the outer layer side (%) = [(7x - c) / 6x] × 100 Initial lotion release rate (%) = [(7x - a) / (7x - c)] × 100

[0008] As the long fiber nonwoven fabric constituting the outer layer of the laminated long fiber nonwoven fabric used in the present invention, those composed of a group of hydrophobic crimped composite long fibers made of eccentric core-sheath type composite long fibers crimped in a helical shape, or those composed of a group of hydrophobic stretchable long fibers are used. First, those composed of a group of hydrophobic crimped composite long fibers will be described. The hydrophobic crimped composite long fibers are composed of eccentric core-sheath type composite long fibers made of a hydrophobic synthetic resin such as polyolefin, polyester, or polyamide. When the eccentric core-sheath type composite long fibers are melt-spun using hydrophobic synthetic resins with different shrinkage rates upon cooling for the core component and the sheath component and then cooled, helical crimps are developed. The helical crimps exhibit spring-like elasticity, and a bulky long fiber nonwoven fabric with a bulk density of 0.01 to 0.08 g / cm 3 can be obtained. By collecting the group of composite long fibers with crimps on a collector such as a conveyor, a long fiber web is formed. Then, by partially heating and pressing the group of composite long fibers constituting this long fiber web, the sheath component is softened or melted, and the composite long fibers are self-bonded to each other, resulting in a long fiber nonwoven fabric composed of a group of hydrophobic crimped composite long fibers with a bulk density of 0.01 to 0.08 g / cm 3 is obtained.

[0009] Next, a long-fiber nonwoven fabric composed of a group of hydrophobic elastic long fibers will be described. The hydrophobic elastic long fibers are obtained by melt spinning a hydrophobic elastomer resin such as hydrophobic polyurethane. The hydrophobic elastomer resin, which is the raw material of such hydrophobic elastic long fibers, may be crosslinked, and although the hydrophobic elastomer resin is sticky, it tends to be difficult to fuse. Therefore, hydrophobic heat-fusible long fibers made of synthetic resins that do not use elastomer resin as the raw material are mixed into the group of hydrophobic elastic long fibers. The mixing ratio of the hydrophobic elastic long fibers and the hydrophobic heat-fusible long fibers is preferably hydrophobic elastic long fibers: hydrophobic heat-fusible long fibers=10-90:90-10 (%) in mass ratio. As the synthetic resin, which is the raw material of the hydrophobic heat-fusible long fibers, hydrophobic synthetic resins such as polyolefin, polyester, or polyamide are generally used. A long-fiber nonwoven fabric made of hydrophobic stretchable long fibers is prepared by melt-spinning the hydrophobic stretchable long fibers and the hydrophobic heat-fusible long fibers together to form a long-fiber web in which both are mixed together, and then partially applying heat and pressure to the long-fiber web to soften or melt the hydrophobic heat-fusible long fibers and fuse the hydrophobic stretchable long fibers together to obtain a long-fiber nonwoven fabric made of hydrophobic stretchable long fibers.

[0010] The above-mentioned long-fiber nonwoven fabric is entangled with hydrophilic short fibers to form a laminated long-fiber nonwoven fabric having the long-fiber nonwoven fabric as an outer layer and the hydrophilic short fibers as an inner layer. As the hydrophilic short fibers, cellulosic fibers such as cotton, rayon, or lyocell can be used. To entangle the hydrophilic short fibers with the long-fiber nonwoven fabric, a short-fiber web formed by opening and stacking the hydrophilic short fibers by a carding method or the like to form a sheet is laminated on the long-fiber nonwoven fabric, and then a high-pressure water jet treatment is performed.

[0011] The weight of the long fiber nonwoven fabric is 10~20g / m 2 The weight of the hydrophilic short fibers forming the inner layer is preferably 15 to 30 g / m 2 Therefore, the basis weight of the laminated long fiber nonwoven fabric is preferably 25 to 50 g / m in the case of a two-layer laminate. 2 In the case of a three-layer structure, it is preferable that the thickness is about 40 to 80 g / m 2It is preferably at such a level. If the basis weight of the laminated long fiber nonwoven fabric is too high, it will be expensive and bulky, and the commercial value will tend to decrease. Also, if the basis weight of the laminated long fiber nonwoven fabric is too low, the absolute value of the lotion impregnation amount will decrease, and the commercial value will tend to decrease. Note that the bulk density of the laminated long fiber nonwoven fabric is 0.07~0.15 g / cm 3 at such a level.

[0012] Adjust the basis weight of the long fiber nonwoven fabric constituting the outer layer of the laminated long fiber nonwoven fabric, the number of crimps of the hydrophobic crimped composite long fiber, the elastic force of the hydrophobic stretchable long fiber, the area and number of the fused parts, and the basis weight of the hydrophilic short fiber group, etc. Then, by setting the total lotion release rate from the outer layer side to less than 50%, more preferably 30~50%, and the initial lotion release rate to 50~70%, the base fabric of the cosmetic sheet used in the present invention can be obtained. If the total lotion release rate exceeds 50%, it becomes difficult to apply the lotion liquid to the target surface when wiping for the fourth time and later. Also, if the initial lotion release rate is less than 50%, it becomes difficult to sufficiently apply the lotion liquid to the target surface when wiping for the first time. Conversely, if the initial lotion release rate exceeds 70%, too much lotion liquid is applied when wiping for the first time, and it becomes difficult to apply the lotion liquid to the target surface when wiping later.

[0013] Various post-treatments may be applied to the base fabric of the cosmetic sheet used in the present invention as desired. For example, a base fabric of a cosmetic sheet having been subjected to shaping treatment using a concavo-convex roll to impart stretchability may be used, and it may be a shaped cosmetic sheet. The cosmetic sheet according to the present invention is used as a face mask, a cleansing sheet, an antiperspirant sheet, or the like.

Advantages of the Invention

[0014] The cosmetic sheet according to the present invention has a long fiber nonwoven fabric in the outer layer that contacts the target surface and is composed of a hydrophobic crimp composite long fiber group or a hydrophobic stretchable long fiber group. Therefore, it is difficult to absorb and hold lotion, but it has a pumping function. On the other hand, the hydrophilic short fiber group in the inner layer is good at absorbing and holding lotion. Therefore, the lotion absorbed and held by the hydrophilic short fiber group is gradually released by the pumping function of the outer layer and applied to the target surface. In addition, since it is equipped with a long fiber nonwoven fabric, it has excellent mechanical strength compared to those composed of only short fibers.

Example

[0015] Example 1 [Preparation of long fiber nonwoven fabric composed of hydrophobic crimp composite long fiber group] As the long fiber nonwoven fabric, a bulky spunbond nonwoven fabric (basis weight 16 g / m 2 , embossing area ratio 10%, bulk density 0.07 g / cm 3 , longitudinal tensile strength 19 N / 5 cm, transverse tensile strength 9 N / 5 cm, longitudinal elongation at break 60%, transverse elongation at break 80%) manufactured by Mitsui Chemicals, Inc. was prepared. The long fibers constituting this long fiber nonwoven fabric are eccentric core-sheath type composite long fibers in which the core component is a polypropylene polymer and the sheath component is a propylene-ethylene random copolymer, and are spiral crimp composite long fibers when latent crimps are developed. The fineness of the crimp composite long fiber is 2.5 dtex and the number of crimps is 23 pieces / 25 mm. The crimp composite long fibers are self-fused by the sheath component at the embossed part.

[0016] [Manufacture of the base fabric of the cosmetic sheet] A cotton fiber group with an average fiber length of 25 mm was opened and accumulated by a parallel carding machine to obtain a basis weight of 24 g / m 2A short fiber web was obtained. A long fiber nonwoven fabric was placed on a conveyor composed of a mesh-like support made of a 90-mesh plastic fabric, and a short fiber web was further placed on the long fiber nonwoven fabric. Then, using an ejection device in which ejection holes with a nozzle hole diameter of 0.1 mm were arranged in a horizontal row with a hole interval of 0.6 mm, a high-pressure water stream was applied to the short fiber web side. The ejection pressure was pretreated once at an ejection pressure of 2 MPa, then treated once at 3 MPa, and treated twice at an ejection pressure of 4 MPa. By this treatment, after entangling the cotton fiber group with the long fiber nonwoven fabric, it was dried at 120 °C to obtain a base fabric for a cosmetic sheet with a long fiber nonwoven fabric on the outer layer and a short fiber group on the inner layer, having a basis weight of 40 g / m 2 of the base fabric for a cosmetic sheet was obtained.

[0017] Example 2 [Preparation of long fiber nonwoven fabric composed of hydrophobic crimped composite long fiber group] As the long fiber nonwoven fabric, a bulky spunbond nonwoven fabric manufactured by Mitsui Chemicals, Inc. [basis weight 20 g / m 2 , embossed area ratio 10%, bulk density 0.06 g / cm 3 , longitudinal tensile strength 24 N / 5 cm, transverse tensile strength 11 N / 5 cm, longitudinal elongation at break 60%, transverse elongation at break 65%] was prepared. The long fibers constituting this long fiber nonwoven fabric are the same as those in Example 1 and are self-fused in the embossed part in the same manner.

[0018] [Manufacture of base fabric for cosmetic sheet] Except that the basis weight of the short fiber web was changed to 20 g / m 2 , the entanglement treatment was carried out in the same manner as in Example 1 to obtain a base fabric for a cosmetic sheet with a basis weight of 40 g / m 2 .

[0019] Example 3 [Preparation of long fiber nonwoven fabric composed of hydrophobic stretchable long fiber group and hydrophobic heat-fusible long fiber group] As the long fiber nonwoven fabric, a mixed fiber spunbond nonwoven fabric manufactured by Mitsui Chemicals, Inc. (basis weight 30 g / m 2 , embossed area ratio 18%, bulk density 0.09 g / cm 3, a longitudinal tensile strength of 21 N / 5 cm, a transverse tensile strength of 10 N / 5 cm, a longitudinal elongation at break of 170%, and a transverse elongation at break of 170% were prepared. This long fiber nonwoven fabric is composed of 47 parts by mass of hydrophobic polyurethane long fibers and 53 parts by mass of polypropylene long fibers. Each long fiber is fused and bonded by polypropylene long fibers at the embossed part.

[0020] [Manufacture of the base fabric of the cosmetic sheet] The basis weight of the short fiber web was changed to 17 g / m 2 and entangled in the same manner as in Example 1 except for this change, and a base fabric of a cosmetic sheet with a basis weight of 47 g / m 2 was obtained.

[0021] Example 4 The base fabric of the cosmetic sheet obtained in Example 3 was passed between a pair of embossed rolls for profiling. The embossed rolls have ridges and valleys running in the circumferential direction, and the pitch between the ridges is 2.5 mm. And a pair of embossed rolls are installed such that the ridges of one embossed roll mesh with the valleys of the other embossed roll and the meshing depth is 2.2 mm. The base fabric of the cosmetic sheet subjected to this profiling had good stretchability in the width direction.

[0022] When the base fabrics of the cosmetic sheets obtained in Examples 1 to 4 were used to determine the total lotion release rate and the initial lotion release rate by the method described in paragraph 0007 of this specification, the results were as shown in Table 1. [Table 1] ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Total lotion release rate (%) Initial lotion release rate (%) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Example 1 31.2 59.4 Example 2 33.0 59.2 Example 3 45.2 65.6 Example 4 44.4 52.8 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

[0023] As shown in Table 1, the base fabrics of the cosmetic sheets obtained in Examples 1 to 4 were such that the impregnated lotion was gradually released by pressing and could be suitably used as cosmetic sheets.

Claims

1. In a decorative sheet in which a base fabric of the decorative sheet is impregnated with a cosmetic liquid, The base fabric is composed of a hydrophobic crimped conjugated long fiber group consisting of eccentric core-sheath type conjugated long fibers that are spirally crimped, and has a bulk density of 0.01 to 0.08 g / cm3, including sites where the hydrophobic crimped conjugated long fibers are bonded to each other by self-fusion. 3 The outer layer is a long-fiber nonwoven fabric of the above-mentioned formula (1), and the inner layer is composed of a group of hydrophilic short fibers intertwined with the long-fiber nonwoven fabric. 2 The laminated long fiber nonwoven fabric is The decorative sheet is characterized in that when the base fabric is impregnated with a lotion in an amount six times the basis weight of the base fabric, the total release rate of the lotion from the outer layer side is less than 50% and the initial release rate of the lotion is 50 to 70%.

2. In a decorative sheet in which a base fabric of the decorative sheet is impregnated with a cosmetic liquid, The base fabric has an outer layer of a long-fiber nonwoven fabric that is made up of a group of hydrophobic elastic long fibers, the hydrophobic elastic long fibers being bonded to each other by fusion of hydrophobic heat-fusible long fibers, and an inner layer that is made up of a group of hydrophilic short fibers that are entangled with the long-fiber nonwoven fabric, and has a basis weight of 25 to 80 g / m 2 The laminated long fiber nonwoven fabric is The decorative sheet is characterized in that when the base fabric is impregnated with a lotion in an amount six times the basis weight of the base fabric, the total release rate of the lotion from the outer layer side is less than 50% and the initial release rate of the lotion is 50 to 70%.

3. 2. The decorative sheet according to claim 1, wherein the hydrophobic crimped conjugated continuous fibers are formed solely from a polyolefin resin.

4. 3. The decorative sheet according to claim 2, wherein the mass ratio of the hydrophobic stretchable long fibers to the hydrophobic heat-fusible long fibers is hydrophobic stretchable long fibers:hydrophobic heat-fusible long fibers=10-90:90-10 (%).

5. 3. The decorative sheet according to claim 1 or 2, which has been subjected to a corrugated shaping process.

6. 3. The cosmetic sheet according to claim 1 or 2, which is a face mask, a cleansing sheet or an antiperspirant sheet.