Method for manufacturing base cloth to be impregnated with cosmetic

Abstract

To provide a base cloth that suppresses elongation of a sheet impregnated with cosmetic when the sheet is taken out or when the folded sheet is unfolded, and imparts excellent skin touch feeling.SOLUTION: A method for manufacturing a base cloth to be impregnated with cosmetic comprises the steps of: preparing a spun-bonded nonwoven fabric roll in which a spun-bonded nonwoven fabric is wound around a winding core: mixing a cotton fiber group with a thermoplastic core-sheath composite short fiber group in which a sheath part is made of polyethylene: preparing a parallel short fiber web by passing the mixed fiber group through a parallel carding machine: obtaining a laminated web by unwinding the spun-bonded nonwoven fabric roll and stacking the parallel short fiber web on one surface of the spun-bonded nonwoven fabric so that a machine direction of the spun-bonded nonwoven fabric matches a machine direction of the parallel short fiber web: and entangling the laminated web by injecting a high pressure water flow to the laminated web.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a base fabric for impregnating a cosmetic material. [Background technology]

[0002] Conventionally, nonwoven fabrics have been widely used as substrates for impregnating cosmetics with cosmetic preparations, such as sheet packs, cleansing sheets, antiperspirant sheets, etc. Examples of nonwoven fabrics that have been used include nonwoven fabrics made only of cotton fibers, nonwoven fabrics made only of rayon fibers, and laminated nonwoven fabrics in which short fiber layers such as cellulose fibers are laminated on both surfaces of a spunbonded nonwoven fabric (e.g., Patent Document 1).

[0003] According to Patent Document 1, by using a laminated nonwoven fabric having an elastic spunbond nonwoven fabric layer as a middle layer and short fiber layers of cellulose fiber or the like laminated on both surfaces as the sheet base material of a sheet pack, it is possible to obtain a sheet pack that fits well to the skin and does not feel tight even when used for long periods of time. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-281003 A Summary of the Invention [Problem to be solved by the invention]

[0005] The sheet pack made of the laminated nonwoven fabric of Patent Document 1 mentioned above has a good fit to the skin, but has the disadvantage that it stretches when the sheet impregnated with the cosmetic is removed or when the folded sheet is unfolded, due to its elasticity.

[0006] The present invention aims to provide a base fabric for impregnation with a cosmetic material, which is suppressed in stretching when a sheet impregnated with a cosmetic material, such as a sheet pack, is taken out or when a folded sheet is unfolded, and which has a pleasant feel against the skin. [Means for solving the problem]

[0007] The present invention achieves the above object, A method for producing a base fabric for impregnating a cosmetic material, comprising: A step of preparing a spunbond nonwoven fabric roll in which a spunbond nonwoven fabric made of continuous fibers is wound around a core; A step of mixing the cellulose short fibers and the thermoplastic composite short fibers; In the mixing step, the thermoplastic conjugate staple fibers are conjugate staple fibers constituted by core-sheath type conjugate staple fibers in which the sheath portion is constituted by polyethylene, The cellulose staple fiber group includes cotton fiber, In the mixing, the mixing ratio of the thermoplastic composite short fiber is 30 to 60 mass %, passing the mixed fibers through a parallel carding machine to prepare a parallel staple fiber web; a step of unwinding a spunbonded nonwoven fabric roll, and superimposing the parallel staple fiber web on one side of the spunbonded nonwoven fabric so that the machine direction of the spunbonded nonwoven fabric and the machine direction of the parallel staple fiber web coincide with each other to obtain a laminated web; The gist of the present invention is a method for producing a base fabric for impregnating a cosmetic preparation, which includes a step of spraying a high-pressure water stream onto a laminated web to entangle the laminated web.

[0008] The present invention relates to a method for producing a base fabric for impregnating a cosmetic material, and the base fabric is composed of a laminated web in which the machine direction of the spunbond nonwoven fabric and the machine direction of the parallel staple fiber web are laminated so as to coincide with each other.

[0009] The spunbond nonwoven fabric used in the present invention is composed of continuous fibers such as polyolefin fibers, polyester fibers, and polyamide fibers. Polyolefin fibers are preferred because they have good bending properties and excellent flexibility. Core-sheath type composite fibers with a core made of polypropylene and a sheath made of polyethylene are also preferred from the viewpoint of flexibility. Core-sheath composite fibers with a core made of polyester and a sheath made of polyethylene are also preferred because they have mechanical strength and flexibility.

[0010] The single fiber fineness of the continuous fibers is preferably 1 to 3 dtex, and more preferably 1 to 2 dtex. A fineness of 1 dtex or more is preferable because it provides practical strength and is not easily broken when entangled with short fibers. A fineness of 3 dtex or less provides the continuous fibers with excellent flexibility and bends without resistance to bending, improving entanglement with short fibers and improving the flexibility of the base fabric.

[0011] The basis weight of spunbond nonwoven fabric is 7 to 25 g / m 2 Good condition. Weight is 7g / m 2 By satisfying the above requirements, the strength of the base fabric for impregnating with a cosmetic preparation can be maintained, and a sheet pack or cleansing sheet that is less likely to deform when impregnated with a cosmetic preparation can be obtained. 2 By setting the thickness within this range, the mass of the base fabric will not become too large, resulting in a sheet pack, cleansing sheet, or the like that has both strength and flexibility.

[0012] Spunbond nonwoven fabrics are produced by the spunbonding method, in which melt-spun fibers are collected on a moving conveyor net, and the continuous fibers are then bonded together to form a spunbond nonwoven fabric, which is then wound around a core to form a spunbond nonwoven fabric roll. In the present invention, such a spunbond nonwoven fabric roll wound around a core is prepared.

[0013] As a means for bonding continuous fibers together, a spunbonded nonwoven fabric is preferably used in which the fibers are partially heat-pressed together by heat embossing to form a single unit. By partially heat-pressing the fibers together, the fabric has flexibility, mechanical strength, and dimensional stability, and is less likely to deform and maintains its dimensions even when a sheet pack, cleansing sheet, or antiperspirant sheet impregnated with a cosmetic is pulled out of a bag, or when a folded sheet pack or the like is unfolded, even if the fabric has a small basis weight. In addition, the spunbonded nonwoven fabric is collected by arranging the axial direction of the continuous fibers in the approximate machine direction, in order to collect the melt-spun fibers on a moving conveyor net. Therefore, the obtained spunbonded nonwoven fabric has excellent strength in the machine direction, and is supple and highly flexible, since the fiber axial direction of the continuous fibers is arranged in the approximate machine direction.

[0014] A parallel staple fiber web is laminated on one side of the spunbond nonwoven fabric. The parallel staple fiber web is a web containing a mixture of cellulose staple fibers and thermoplastic composite staple fibers.

[0015] In preparing the mixed web, a predetermined amount of cellulose staple fibers and thermoplastic composite staple fibers are mixed, and the mixed staple fibers are passed through a parallel carding machine to obtain a parallel staple fiber web in which the two are mixed.

[0016] The cellulose staple fiber group includes cotton fiber, and the cotton fiber content in the cellulose staple fiber group is 50% by mass or more. Cotton fiber is a natural fiber, which is less irritating to the skin and has excellent liquid absorption properties, and is therefore preferable because it can hold cosmetics well. The cellulose staple fiber group may be entirely composed of cotton fiber, but the cellulose staple fiber group may contain cellulose staple fibers other than cotton fiber in an amount of less than 50% by mass. Examples of cellulose staple fibers other than cotton fiber include rayon staple fibers and solvent-spun cellulose staple fibers.

[0017] When the cellulose short fibers and the thermoplastic composite short fibers are mixed, the mixing ratio (mass ratio) is cellulose short fibers:thermoplastic composite short fibers=40-70:60-30. If the ratio of the thermoplastic composite short fibers exceeds 60% by mass, the liquid retention capacity of the obtained base fabric tends to decrease and the skin feel tends to be poor. On the other hand, if the mixing ratio of the thermoplastic composite short fibers is less than 30% by mass, it becomes difficult to impart the functionality of the thermoplastic composite short fibers to the base fabric.

[0018] The thermoplastic composite short fibers are preferably core-sheath type composite short fibers in which the sheath is made of polyethylene. The core is preferably made of a thermoplastic resin having a higher melting point than the polyethylene of the sheath. Examples of such high melting point thermoplastic resins include polypropylene and polyester. The polyethylene of the sheath melts and softens when heated, so that the base fabric can be given heat sealability and thermoformability. In addition, since the core-sheath type composite short fibers in which the sheath is made of polyethylene have excellent flexibility, they can be left in an unheated state without being heated, rather than being melted and softened by heat treatment as described above to function as binder fibers, thereby contributing to improving the flexibility of the base fabric.

[0019] As the thermoplastic composite staple fiber, it is also preferable to use a split type composite staple fiber composed of two kinds of polymers instead of the above-mentioned core-sheath type composite staple fiber. Examples of the split type composite staple fiber include a split type composite staple fiber composed of polypropylene and polyester, and a split type composite staple fiber composed of polyamide and polyester. In addition, a combination of biodegradable polymers, for example, a split type composite staple fiber composed of polylactic acid and polyalkylene succinate, may be used. The split type composite staple fiber is split and split by the pressure of the high-pressure water flow in the intertwining treatment process, and ultrafine fibers are developed. As the split shape of the split type composite fiber, it is preferable that two kinds of polymers are radially alternately arranged in the cross section.

[0020] As the thermoplastic conjugate short fibers, both the above-mentioned core-sheath type conjugate short fibers and split type conjugate short fibers may be used.

[0021] The fiber length of the short fibers constituting the short fiber web is preferably about 20 to 55 mm. In addition, the single fiber fineness is preferably small in consideration of the touch, and is preferably 2.5 dtex or less, more preferably 2.0 dtex or less. The lower limit of the single fiber fineness may be about 0.1 dtex. In addition, a single fiber fineness of 2.5 dtex or less is preferable because the fibers are easily bent and easily entangled with the continuous fibers when intertwined and integrated with the spunbonded nonwoven fabric, and is also preferable because it is gentle on the skin.

[0022] The basis weight of the staple fiber web is 15 to 55 g / m 2 The staple fiber web contains 40 to 70% by mass of cellulose staple fibers, and therefore has excellent liquid absorption properties, and is able to absorb the cosmetic material to be impregnated into the base fabric, while also playing a role in retaining the absorbed cosmetic material. When the basis weight is within the above range, the web can absorb and retain liquid well. When the basis weight is 15 g / m 2 If it is less than 55 g / m, it will be difficult to sufficiently retain the cosmetic material. 2 If the thickness exceeds this range, the cosmetic will be absorbed in a large amount, and for example, in the case of a sheet pack, the user may feel it is heavy when applying it to the face, etc. The staple fiber web is laminated on at least one side of the spunbond nonwoven fabric, and when laminated on both sides, the total basis weight of the staple fiber webs laminated on both sides is 15 to 55 g / m 2 It is preferable that:

[0023] The staple fiber web laminated on one side of the spunbonded nonwoven fabric is a parallel staple fiber web prepared by a parallel carding machine. Generally, methods for preparing staple fiber webs include a parallel web in which the axial direction of the fibers is aligned in the machine direction of the web, a cross web in which the parallel web is inverted and stacked so that the direction perpendicular to the machine direction becomes the fiber direction, and the axial direction of the fibers is aligned in the direction perpendicular to the machine direction, and a random web in which the fibers are transported by centrifugal force of an air flow and the fibers are stacked in a random direction rather than in a fixed direction. Another example is an air-laid web in which the fibers are stacked in a random direction rather than in a fixed direction, like the random web. In the present invention, a parallel web in which the fibers are oriented in the machine direction and the fibers are oriented in one direction among the above-mentioned webs is adopted to obtain a base fabric for impregnating a cosmetic preparation with a good texture. In addition, since the orientation direction of the fibers in a parallel web is the machine direction, the strength ratio between the machine direction (MD) and the direction perpendicular to it (CD) is large, and the strength balance is poor. Therefore, when a parallel web consisting only of such short fibers is used to perform a hydroentanglement process, a drying process after the entanglement process, or a processing process when cutting a base fabric into a specific shape or punching it out into a specific shape as a sheet pack, the strength in the CD direction is low and the web will stretch in the machine direction, causing problems in processability during the processing process. However, in the present invention, such a parallel web is laminated and integrated with a spunbond nonwoven fabric, resulting in a base fabric that has excellent dimensional stability, is less likely to stretch in width during processing, and is easy to handle.

[0024] In the present invention, a spunbonded nonwoven fabric roll is prepared in which the spunbonded nonwoven fabric made of the above-mentioned continuous fibers is wound around a core, and on the other hand, a parallel short fiber web is prepared as the above-mentioned mixed staple fiber web produced by a parallel carding machine, the spunbonded nonwoven fabric roll is unwound, the parallel short fiber web is overlaid on one side of the spunbonded nonwoven fabric so that the machine direction of the spunbonded nonwoven fabric and the machine direction of the parallel short fiber web coincide with each other to obtain a laminated web, and a high-pressure water stream is sprayed onto the laminated web to perform a hydroentanglement treatment. Since the continuous fibers constituting the spunbonded nonwoven fabric and the short fibers constituting the short fiber web are also oriented in the machine direction in the laminated web, and both are oriented in the machine direction, the sprayed high-pressure water stream entangles the short fiber webs while maintaining their orientation state almost completely, and the short fibers are entangled with the continuous fibers, and the laminated web is entangled and integrated. Both the continuous fibers and the short fibers are oriented in the machine direction, and the constituent fibers are oriented in the same direction, so that a base fabric for impregnating a cosmetic material with good flexibility, good touch, and good texture can be obtained. Furthermore, by laminating the spunbonded nonwoven fabric, the fabric has practical strength, is not easily cut in width, has excellent dimensional stability, and is easy to process, and when it is used as a sheet pack or cleansing sheet containing a cosmetic material, it is unlikely to stretch or deform when taken out of the bag. Furthermore, since the constituent fibers of the short fiber web are entangled and integrated by a hydroentanglement treatment, when it is used as a sheet pack, cleansing sheet, or antiperspirant sheet containing a cosmetic material, the cellulose short fibers themselves absorb the cosmetic material and can hold the cosmetic material well in the inter-fiber voids formed by the entanglement.

[0025] When a staple fiber web is laminated on a spunbonded nonwoven fabric, a two-layer structure is formed by laminating the above-mentioned parallel staple fiber web on one side of the spunbonded nonwoven fabric, but a three-layer structure may also be formed by laminating a staple fiber web on the other side of the spunbonded nonwoven fabric and a staple fiber web on both sides of the spunbonded nonwoven fabric. In the case of a three-layer structure, if the staple fiber web laminated on the other side is also a parallel staple fiber web, the flexibility is good. Furthermore, if the staple fiber web laminated on the other side is not a parallel staple fiber web but a random web or a cross web, it is preferable to adopt a staple fiber web having a basis weight that is the same as, equal to, or smaller than the basis weight of the parallel web laminated on one side from the viewpoint of flexibility.

[0026] In the present invention, a laminated web is obtained by overlapping a parallel short fiber web on one side of a spunbonded nonwoven fabric so that the machine direction of the spunbonded nonwoven fabric and the machine direction of the parallel short fiber web coincide with each other, and this laminated web is subjected to a hydroentanglement treatment by spraying a high-pressure water stream. The high-pressure water stream in the hydroentanglement treatment is, for example, performed by colliding a water stream with a pressure of 1 to 10 MPa with the laminated web. First, preliminary entanglement is performed with a high-pressure water stream of about 1 to 3 MPa, and then main entanglement is performed with a water stream with a pressure of 4 to 10 MPa, thereby obtaining a product with good texture. In addition, if the water stream pressure exceeds 10 MPa, the entanglement between the spunbonded nonwoven fabric and the short fiber web becomes too strong, and the flexibility tends to be somewhat inferior.

[0027] Since the laminate obtained by the hydroentanglement treatment contains water due to the high-pressure water flow treatment, this water is removed through a dehydration and drying process to obtain a base fabric for impregnating with a cosmetic preparation. The dehydration and drying process can be carried out by a conventionally known method, for example, by squeezing the liquid from the laminate with a mangle or the like and then passing it through a dryer.

[0028] The base fabric for impregnating a cosmetic preparation is formed by laminating a spunbonded nonwoven fabric and a staple fiber web, and is integrated by entangling the staple fibers with each other and with the spunbonded nonwoven fabric. Note that some of the staple fibers entangled with the spunbonded nonwoven fabric may be present on the surface of the spunbonded nonwoven fabric.

[0029] The basis weight of the base fabric is 25~65g / m 2 The range is preferably 25g / m 2 By setting the thickness to 65 g / m or more, the sheet has a suitable strength and can hold the cosmetic material well. 2 By satisfying the above condition, the mass of the sheet pack itself containing the cosmetic material or the cleansing sheet itself does not become too large, making it easy to handle.

[0030] In the present invention, it is also preferable that the base fabric for impregnating with a cosmetic preparation is colored in a color other than white. Generally, the base fabric for impregnating with a cosmetic preparation is white, which gives a so-called clean image, but by coloring in a color other than white, it is possible to impart design features such as aesthetics other than a clean image. In addition, various images can be given depending on the hue of the coloring.

[0031] Examples of the hues include blue, light blue, purple, green, scarlet, yellow, and pink. Blue and light blue have a clean and refreshing feeling and tend to make the user feel calm, while green, scarlet, and yellow tend to make the user feel energized, and purple and pink tend to make the user feel lively. When the obtained base fabric is used to make a sheet pack or the like, the container such as a bag for storing the sheet pack or the like can be colored in the same color as the base fabric, thereby providing a more design-oriented and unified look. It is also preferable to select the color to be imparted to the base fabric depending on the efficacy and image of the cosmetic to be impregnated into the base fabric.

[0032] As a method for coloring the base fabric for cosmetic impregnation, the obtained base fabric may be dyed to a desired color. In addition, as the spunbonded nonwoven fabric constituting the base fabric for cosmetic impregnation, it is also preferable to use a spunbonded nonwoven fabric colored by dyeing or a spunbonded nonwoven fabric in which the fibers constituting the nonwoven fabric contain a pigment having a color other than white. When using a colored spunbonded nonwoven fabric, in order to bring out the hue of the spunbonded nonwoven fabric, it is preferable to use a thermoplastic composite short fiber containing a white pigment as the cellulose short fiber and the thermoplastic composite short fiber constituting the staple fiber web. In addition, in order to bring out the hue of the spunbonded nonwoven fabric more, the thermoplastic composite short fiber may be a spunbonded short fiber containing a pigment of the same color as the spunbonded nonwoven fabric, a cellulose short fiber dyed with a dye of the same color, or a thermoplastic composite short fiber dyed with a dye of the same color.

[0033] The obtained base fabric for impregnation with a cosmetic material is formed into a desired shape, for example, by punching processing, into a shape that covers all or part of the face, or a shape that covers the neck or the neck and chest, and is impregnated with a cosmetic such as a lotion, a beauty essence, or a milky lotion to form a sheet pack. The sheet pack impregnated with the cosmetic material may be folded appropriately and stored in a bag or the like. The sheet pack obtained from the base fabric of the present invention has good dimensional stability, so it does not stretch easily when taken out of the bag, and has a very good texture.

[0034] The obtained base fabric for cosmetic impregnation is cut to an appropriate size, and is impregnated with a cosmetic such as a cleansing lotion or cleansing milk for removing makeup to produce a cleansing sheet. The cleansing sheet is folded appropriately, and a plurality of folded cleansing sheets are stored in a storage body. When storing a plurality of sheets, the cleansing sheets are combined so that a part of the cleansing sheet is sandwiched between the folded parts of the other cleansing sheets to be laminated thereto, and can be taken out one after another. The cleansing sheet obtained from the base fabric of the present invention has good dimensional stability, so that it is difficult to stretch when taken out of a bag, is difficult to deform even when in a form that can be taken out one after another, and has a very good texture.

[0035] The obtained base fabric for cosmetic impregnation is cut to an appropriate size and impregnated with a cosmetic such as lotion for antiperspirant sheets to produce an antiperspirant sheet. The antiperspirant sheet may be folded appropriately, and a plurality of folded antiperspirant sheets may be stored in a storage body. When storing a plurality of sheets, the sheets may be combined so that a portion of the antiperspirant sheet is sandwiched between the folded portions of the other antiperspirant sheets to be laminated thereon, and may be taken out one after the other. The antiperspirant sheet obtained from the base fabric of the present invention has good dimensional stability, so that it does not stretch easily when taken out of a bag, does not deform easily even when in a form that can be taken out one after the other, and has a very good texture. Effect of the Invention

[0036] According to the present invention, it is possible to provide a base fabric for impregnating with a cosmetic preparation, which has good texture, a pleasant feel to the touch, good dimensional stability, and excellent processability. EXAMPLES

[0037] Example 1 [Preparation of spunbond nonwoven fabric] A spunbond nonwoven fabric obtained by the spunbonding method, which is made of dyed polypropylene continuous fibers containing a pigment formulated to produce a purple color, and which has been subjected to a thermal embossing process (basis weight 20 g / m 2 A spunbond nonwoven fabric roll (product number SP-1020E-PLV, manufactured by Maeda Kosen Co., Ltd.) having continuous fibers (single fiber fineness of 2.2 dtex) wound around a core was prepared. [Preparation of parallel staple fiber web] Cotton fibers with an average fiber length of 25 mm and core-sheath type composite staple fibers with a single fiber fineness of 2.2 decitex and a fiber length of 38 mm, the sheath of which is polyethylene and the core of which is polyethylene terephthalate, are mixed in a ratio of cotton fibers:core-sheath type composite staple fibers = 50:50 (mass ratio), and the fibers are opened and accumulated in a parallel carding machine to produce a fiber weight of 25 g / m. 2 A parallel staple fiber web was prepared by mixing the cotton fibers and the core-sheath type composite fibers. [Cosmetic-impregnated base fabric] The spunbonded nonwoven fabric roll prepared above was unwound, and the parallel short fiber web was layered on the spunbonded nonwoven fabric so that the machine direction of the spunbonded nonwoven fabric and the machine direction of the parallel short fiber web were aligned. The laminated web was placed on a support made of a 90 mesh woven fabric and passed through a high-pressure water jetting device (a device in which jetting holes with a hole diameter of 0.12 mm are arranged in a horizontal row with a hole interval of 0.6 mm), and a high-pressure water jet was applied from the short fiber web side at a jetting pressure of 2 MPa, and then a high-pressure water jet was applied at a jetting pressure of 3 MPa. After this, the laminated web was inverted and a high-pressure water jet was applied twice from the spunbonded nonwoven fabric side at a jetting pressure of 5 MPa, and then it was inverted and a jetting pressure of 5 MPa was applied twice from the short fiber web side to obtain an intertwined and integrated laminate. Then, it was heated at 135 ° C for 120 seconds to evaporate the moisture contained in the laminate, and a base fabric was obtained.

[0038] Example 2 [Preparation of spunbond nonwoven fabric] A roll of the spunbond nonwoven fabric prepared in Example 1 was prepared. [Preparation of parallel staple fiber web] Cotton fibers with an average fiber length of 25 mm and core-sheath type composite staple fibers with a single fiber fineness of 2.2 decitex and a fiber length of 38 mm, the sheath of which is polyethylene and the core of which is polyethylene terephthalate, are mixed in a ratio of cotton fibers:core-sheath type composite staple fibers = 50:50 (mass ratio), and the fibers are opened and accumulated in a parallel carding machine to produce a fiber weight of 18 g / m. 2 A parallel staple fiber web was prepared by mixing the cotton fibers and the core-sheath type composite fibers. [Preparation of random staple fiber web] Cotton fibers with an average fiber length of 25 mm and core-sheath type composite staple fibers with a single fiber fineness of 2.2 decitex and a fiber length of 38 mm, the sheath of which is polyethylene and the core of which is polyethylene terephthalate, are mixed in a ratio of cotton fibers:core-sheath type composite staple fibers = 50:50 (mass ratio), and the fibers are opened and accumulated using a random cart machine to produce a fiber weight of 17 g / m. 2 A random staple fiber web was prepared by mixing the cotton fibers and the core-sheath type composite fibers. [Cosmetic-impregnated base fabric] A spunbond nonwoven roll was unwound and laminated on the random staple fiber web prepared above, and the spunbond nonwoven was laminated on top of the spunbond nonwoven so that the machine direction of the spunbond nonwoven coincided with that of the parallel staple fiber web. The resulting three-layer laminated web was placed on a support made of a 90-mesh woven fabric and passed through a high-pressure water jetting device (a device in which jetting holes with a hole diameter of 0.12 mm are arranged in a horizontal row with a hole interval of 0.6 mm), and a high-pressure water jet was applied from the parallel staple fiber web side with a jetting pressure of 2 MPa, and then a high-pressure water jet was applied with a jetting pressure of 3 MPa.

[0039] The laminated web was then inverted, and a high-pressure water jet was applied once from the random staple fiber web side at a pressure of 5 MPa and then at a pressure of 9 MPa, and then the laminated web was inverted again and another jet of 5 MPa and then at a pressure of 9 MPa was applied from the parallel staple fiber web side to form an intertwined laminate.Then, the laminated web was heated at 135°C for 120 seconds to evaporate the water contained therein, and a base fabric was obtained.

[0040] Comparative Example 1 [Preparation of parallel staple fiber web] Cotton fibers with an average fiber length of 25 mm and core-sheath type composite staple fibers with a single fiber fineness of 2.2 decitex and a fiber length of 38 mm, the sheath of which is polyethylene and the core of which is polyethylene terephthalate, are mixed in a ratio of cotton fibers:core-sheath type composite staple fibers = 50:50 (mass ratio), and the fibers are opened and accumulated in a parallel carding machine to produce a fiber weight of 20 g / m. 2 A parallel staple fiber web was prepared by mixing the cotton fibers and the core-sheath type composite fibers. [Preparation of random staple fiber web] Cotton fibers with an average fiber length of 25 mm and core-sheath type composite staple fibers with a single fiber fineness of 2.2 decitex and a fiber length of 38 mm, the sheath of which is polyethylene and the core of which is polyethylene terephthalate, are mixed in a ratio of cotton fibers:core-sheath type composite staple fibers = 50:50 (mass ratio), and the fibers are opened and piled up in a random carding machine to produce a fiber weight of 35 g / m. 2 A random staple fiber web was prepared by mixing the cotton fibers and the core-sheath type composite fibers. [Cosmetic-impregnated base fabric] The parallel staple fiber web and the random staple fiber web prepared above were laminated, and the resulting two-layer laminated web was placed on a support made of a 90-mesh woven fabric, and passed through a high-pressure water jetting device (a device in which jetting holes with a hole diameter of 0.12 mm are arranged in a horizontal row with a hole interval of 0.6 mm), and a high-pressure water jet was applied from the parallel staple fiber web side at a jetting pressure of 2 MPa, and then a high-pressure water jet was applied at a jetting pressure of 7 MPa. After this, the laminated web was inverted, and a high-pressure water jet was applied twice from the random staple fiber web side at a jetting pressure of 7 MPa, and then it was inverted and sprayed twice from the parallel staple fiber web side at a jetting pressure of 7 MPa to obtain an intertwined and integrated laminate. Then, it was heated at 135°C for 120 seconds to evaporate the moisture contained in the laminate, and a base fabric was obtained.

[0041] The obtained base fabrics of Examples 1 and 2 and Comparative Example 1 were measured for the following physical properties, and the results are shown in Table 1. (1) Weight (g / m 2 ): Ten test pieces (10 cm long x 10 cm wide) were prepared from the sample under standard conditions, and the mass of each test piece was weighed. The average of the obtained values ​​was converted into the weight per unit area to obtain the weight per unit area. (2) Tensile strength (N / 50 mm width): According to the strip method described in JIS L-1913, a test piece with a width of 50 mm and a length of 300 mm was used to measure the stress at 5% elongation, the stress at 10% elongation, and the maximum tensile strength at a gripping distance of 100 mm and a tensile speed of 100 mm / min. Five test pieces were prepared in the MD direction, CD direction, and 5 points at a 45° angle to the MD direction, and the average values ​​were used as the stress and tensile strength. In addition, test pieces were prepared in both standard (dry) and wet conditions. The wet test pieces were prepared by soaking a test piece of a given size with tap water of a mass 3.5 times the weight of the test piece, and the stress and tensile strength of the wet test pieces were measured. (3) Water retention capacity (g): Three test pieces measuring 150 mm in width and 150 mm in length were prepared, and tap water was placed in a tray. The test pieces were immersed in the water for five minutes, and then hung for three minutes to allow the excess water contained in the test pieces to drop naturally. After that, the mass of the test pieces containing the tap water was measured, and the difference from the mass of the test pieces before immersion (the mass increased by absorbing tap water) was calculated. The liquid retention capacity of the test pieces was evaluated based on the increased mass (water retention capacity).

[0042] [Table 1]

[0043] Compared to Comparative Example 1, Examples 1 and 2 had higher stresses at 5% and 10% elongation in all directions, MD, CD, and 45°, when wetted with liquid. This shows that the base fabrics that hold cosmetic preparations are resistant to deformation and easy to remove from a package such as a bag, and can stably maintain their shape when pulled out for use.

Claims

1. A method for producing a base fabric for impregnating a cosmetic material, comprising: A step of preparing a spunbond nonwoven fabric roll in which a spunbond nonwoven fabric made of continuous fibers is wound around a core; A step of mixing the cellulose short fibers and the thermoplastic composite short fibers; In the mixing step, the thermoplastic conjugate staple fibers are conjugate staple fibers constituted by core-sheath type conjugate staple fibers in which the sheath portion is constituted by polyethylene, The cellulose staple fiber group includes cotton fiber, In the mixing, the mixing ratio of the thermoplastic composite short fibers is 30 to 60 mass %, passing the mixed fibers through a parallel carding machine to prepare a parallel staple fiber web; a step of unwinding a spunbonded nonwoven fabric roll, and superimposing the parallel staple fiber web on one side of the spunbonded nonwoven fabric so that the machine direction of the spunbonded nonwoven fabric and the machine direction of the parallel staple fiber web coincide with each other to obtain a laminated web; A method for producing a base fabric for impregnating with a cosmetic preparation, comprising a step of spraying a high-pressure water stream onto a laminated web to entangle the laminated web.

2. 2. The method for producing a cosmetic-impregnated base fabric according to claim 1, wherein the cellulose staple fibers are composed of cotton fibers and rayon fibers, and the cellulose staple fibers contain 50% by mass or more of cotton fibers.

3. 2. The method for producing a cosmetic-impregnated base fabric according to claim 1, wherein the thermoplastic conjugate staple fibers are split type conjugate staple fibers composed of polypropylene and polyester, or split type conjugate staple fibers composed of polyamide and polyester, instead of the conjugate staple fibers composed of core-sheath type conjugate staple fibers whose sheath is composed of polyethylene.

4. According to claim 1, the thermoplastic conjugate staple fibers are composed of core-sheath type conjugate staple fibers in which the sheath portion is made of polyethylene and split type conjugate staple fibers, 2. The method for producing a cosmetic-impregnated base fabric according to claim 1, wherein the splittable composite staple fiber is either a splittable composite staple fiber composed of polypropylene and polyester or a splittable composite staple fiber composed of polyamide and polyester.

5. 2. The method for producing a base fabric for impregnating a cosmetic preparation according to claim 1, wherein the spunbonded nonwoven fabric is a nonwoven fabric formed by partially bonding continuous fibers together by heat and pressure.

6. 2. The method for producing a base fabric for impregnating with a cosmetic material according to claim 1, wherein the spunbond nonwoven fabric is made of dyed fibers containing a pigment other than white, and the base fabric for impregnating with a cosmetic material is colored in a color other than white.

7. 7. The method for producing a base fabric for impregnating a cosmetic preparation according to claim 6, wherein the cellulose staple fibers and the thermoplastic composite staple fibers constituting the staple fiber web are both uncolored or contain a white pigment.

8. 2. The method for producing a base fabric for a sheet pack according to claim 1, wherein the base fabric for impregnating the cosmetic material is a base fabric for a sheet pack.

9. 2. The method for producing a cleansing fabric according to claim 1, wherein the fabric to be impregnated with the cosmetic is a cleansing fabric for removing makeup.

10. 2. The method for producing a base fabric for antiperspirant sheets according to claim 1, wherein the base fabric for impregnating the cosmetic material is a base fabric for antiperspirant sheets.

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