Absorbent article

Abstract

To provide a laminate nonwoven fabric excellent in both of body fluid drawing property and diffusivity.SOLUTION: There is provided a laminate nonwoven fabric (100) for an absorbent article comprising: a first layer (101) having a first fiber (101a); and a second layer (102) having a second fiber (102a), where the first layer (101) is a layer located on a skin face side of the laminate nonwoven fabric (100), the second layer (102) is a layer located on a non-skin face side of the laminate nonwoven fabric (100), hydrophilic property of the first fiber (101a) is lower than that of the second fiber (102a), and at least a part of the first fiber (101a) and at least a part of the second fiber (102a) are entangled each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a laminated nonwoven fabric and an absorbent article comprising said laminated nonwoven fabric. [Background technology]

[0002] Conventionally, there have been known means for enhancing the sweat absorption function in absorbent articles. For example, Patent Document 1 discloses a disposable diaper in which a hydrophilic sheet, which is made by joining together two sheets with different liquid diffusion properties, is arranged on a waist flap, and the sheet with high liquid diffusion property is arranged on the non-skin contact side of the hydrophilic sheet, thereby facilitating the transfer of sweat from the skin contact side to the non-skin contact side, and quickly diffusing the sweat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5560071 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the disposable diaper described in Patent Document 1 is made of two layers of sheet members with different sweat absorption properties that are bonded together using an adhesive, heat sealing, or the like, which makes it difficult for sweat to transfer to the areas bonded using such adhesives, heat sealing, or the like, and can sometimes prevent sweat from diffusing from the skin side to the non-skin side.

[0005] The present invention has been made in view of the above problems, and an object of the present invention is to provide a laminated nonwoven fabric which is excellent in terms of the ability to absorb and diffuse body fluids. [Means for solving the problem]

[0006] The main invention for achieving the above-mentioned object is a laminated nonwoven fabric for absorbent articles, comprising a first layer having first fibers and a second layer having second fibers, wherein the first layer is a layer located on the skin-facing side of the laminated nonwoven fabric, the second layer is a layer located on the non-skin-facing side of the laminated nonwoven fabric, the hydrophilicity of the first fibers is lower than the hydrophilicity of the second fibers, and at least a portion of the first fibers and at least a portion of the second fibers are entangled with each other. Other features of the present invention will become apparent from the following detailed description of the present invention and the accompanying drawings. Effect of the Invention

[0007] According to the present invention, a laminated nonwoven fabric having excellent absorbency and diffusibility of body fluids can be provided. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic cross-sectional view of a laminated nonwoven fabric 100. [Diagram 2] FIG. 2 is an enlarged cross-sectional view of a portion of FIG. [Diagram 3] FIG. 2 is a diagram illustrating the absorption of sweat in the laminated nonwoven fabric 100. [Figure 4] Photographs of the surface of each of the laminated nonwoven fabrics of the Examples and Comparative Examples in a diffusivity test are shown. [Diagram 5] FIG. 1 is a bar graph showing the amount of sweat remaining on the skin in an example and a comparative example. [Figure 6] FIG. 1 is a schematic perspective view of a diaper 1 as seen from the abdominal side. [Figure 7] FIG. 1 is a schematic plan view of a diaper 1 in an unfolded and extended state, as viewed from the wearer's skin side. [Figure 8] 8 is a schematic cross-sectional view taken along line II in FIG. 7. [Figure 9] 13 is a partial cross-sectional view showing a modified example of the arrangement of the sweat-absorbing sheet 50 and the cover sheet 35. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] At least the following points will become apparent from the description of this specification and the accompanying drawings. Aspect 1 is a laminated nonwoven fabric for absorbent articles comprising a first layer having first fibers and a second layer having second fibers, the first layer being a layer located on the skin-facing side of the laminated nonwoven fabric, the second layer being a layer located on the non-skin-facing side of the laminated nonwoven fabric, the hydrophilicity of the first fibers being lower than the hydrophilicity of the second fibers, and at least a portion of the first fibers and at least a portion of the second fibers being entangled with each other.

[0010] According to the first aspect, by providing a gradient of hydrophilicity such that the hydrophilicity of the first layer having the first fibers is lower than that of the second layer having the second fibers, sweat adhering to the skin is easily drawn from the first layer to the second layer, and the sweat is easily diffused in the more hydrophilic second layer. Also, in the portion where the first fibers and the second fibers are intertwined, sweat is easily drawn from the first fibers, which are less hydrophilic than the second fibers, to the second fiber side. As a result, sweat adhering to the skin can be quickly transferred and diffused from the skin side to the non-skin side. By improving the diffusion of sweat, the occurrence of skin troubles such as eczema, heat rash, and rash during use can be suppressed.

[0011] Aspect 2 is a laminated nonwoven fabric according to Aspect 1, in which the first layer and the second layer are laminated in the thickness direction, and when, in the thickness direction, the side that comes into contact with the wearer during use is the skin side and the opposite side is the non-skin side, at least a portion of the second fibers are present on the same plane as the skin-side surface of the first layer.

[0012] According to the second aspect, the second fibers are more hydrophilic than the first fibers, and therefore the second fibers that are flush with the skin-side surface of the first layer are more likely to absorb moisture. By improving the ability to absorb moisture, sweat can be more easily transferred to the non-skin side.

[0013] A third aspect is the laminated nonwoven fabric according to the first or second aspect, which does not contain an adhesive and has no portions where the first fibers and the second fibers are fused to each other.

[0014] According to aspect 3, if the material contains an adhesive or has portions where the fibers are fused together, there is a risk that the adhesive or fused portions may hinder the transfer of sweat. However, by using a configuration that does not contain these, sweat can be transferred smoothly from the first fiber to the second fiber.

[0015] A fourth aspect is the laminated nonwoven fabric according to any one of the first to third aspects, wherein the laminated nonwoven fabric is used on a surface of the absorbent article that comes into contact with the skin of a user.

[0016] According to aspect 4, by using a laminated nonwoven fabric on the surface that comes into contact with the user's skin, sweat adhering to the user's skin can be effectively absorbed, making it easier to prevent the occurrence of skin problems such as eczema and heat rash.

[0017] A fifth aspect is the laminated nonwoven fabric according to the fourth aspect, wherein the first layer has an average coefficient of friction smaller than the average coefficient of friction of the second layer.

[0018] According to the fifth aspect, the first layer is a layer located on the skin-facing side of the laminated nonwoven fabric, that is, when the laminated nonwoven fabric is used on the surface (skin-facing side) that comes into contact with the user's skin, the first layer is a layer that constitutes the skin-facing side. Usually, the larger the value of the average coefficient of friction (MIU), the rougher and more likely the surface of the layer (fabric) is to get caught, and the smaller the value, the smoother the surface of the layer (fabric). Since the average coefficient of friction of the first layer is small, the surface of the first layer is smooth, and the area of ​​contact with the skin is increased, thereby improving the sweat absorption performance.

[0019] Aspect 6 is the laminated nonwoven fabric of any one of aspects 1 to 5, having an intermediate layer between the first layer and the second layer, the intermediate layer having a higher water retention than the first layer, and the second layer having a higher water retention than the intermediate layer.

[0020] According to the sixth aspect, in the laminated nonwoven fabric, the water retention increases in the order of the first layer, the intermediate layer, and the second layer. In other words, by providing a gradient in the water retention of the laminated nonwoven fabric, absorbed sweat can easily move from the first layer through the intermediate layer to the second layer, and sweat can be prevented from accumulating in the first layer. By preventing sweat from accumulating on the skin, the occurrence of skin troubles can be prevented.

[0021] Aspect 7 is the laminated nonwoven fabric of aspect 6, wherein the intermediate layer comprises an antimicrobial agent.

[0022] According to aspect 7, an antibacterial effect can be exerted on sweat absorbed and retained in the intermediate layer, and the proliferation of bacteria in the retained sweat can be inhibited. Bacteria that tend to proliferate due to sebum and the like can easily cause skin troubles, but inhibiting the proliferation of such bacteria can inhibit the occurrence of eczema, heat rash, rashes, and the like.

[0023] Aspect 8 is the laminated nonwoven fabric according to any one of aspects 1 to 7, wherein the first fibers are polyethylene terephthalate (PET) fibers and the second fibers are rayon fibers.

[0024] According to the eighth aspect, since the rayon fiber has better hydrophilicity and diffusibility than the polyethylene terephthalate fiber, it is easy to create a hydrophilic gradient that draws moisture from the first layer to the second layer, thereby improving the transfer and diffusion of sweat from the first layer to the second layer.

[0025] A ninth aspect is an absorbent article having an absorbent body with an absorbent core, the absorbent article including the laminated nonwoven fabric according to any one of the first to eighth aspects.

[0026] According to the ninth aspect, by including the laminated nonwoven fabric, the absorbent article can easily absorb, diffuse, and evaporate the sweat of the user during use, thereby preventing skin troubles caused by sweat.

[0027] Aspect 10 is an absorbent article as described in Aspect 9, which, when worn, has vertical and horizontal directions that intersect with each other, has a pair of waistbands, and in the absorbent main body, a top sheet is arranged on the skin side of the absorbent core, and the laminated nonwoven fabric is provided on at least a portion of the skin-facing side of the pair of waistbands and is arranged at a position spaced apart from the absorbent core, and is arranged in the order of the laminated nonwoven fabric and the top sheet from the skin side at the center of the absorbent article in the horizontal direction and at the lower end of the laminated nonwoven fabric in the vertical direction.

[0028] According to aspect 10, by arranging the laminated nonwoven fabric in the waist area where sweat is likely to be released, a large amount of sweat can be absorbed. In addition, by arranging the laminated nonwoven fabric and the top sheet in this order from the skin side in the left-right central area of ​​the absorbent article, even when the laminated nonwoven fabric absorbs a large amount of sweat, the sweat can be transferred to the absorbent core side, thereby preventing bodily fluids (sweat) from returning to the skin.

[0029] Aspect 11 is the absorbent article of aspect 10, wherein the hydrophilicity of the second layer of the laminated nonwoven fabric is higher than the hydrophilicity of the top sheet.

[0030] According to aspect 11, the second layer of the laminated nonwoven fabric is a layer of the laminated nonwoven fabric that is arranged on the non-skin side (top sheet side) (i.e., the layer in contact with the top sheet). Since the hydrophilicity of such a second layer is higher than that of the top sheet, sweat absorbed by the laminated nonwoven fabric can be prevented from transferring excessively to the top sheet side.

[0031] Aspect 12 is an absorbent article as described in Aspect 9, which, when worn, has a top-down and left-right directions that intersect with each other, has a pair of waistbands, and in the absorbent main body, a top sheet is arranged on the skin side of the absorbent core, and the laminated nonwoven fabric is provided on at least a portion of the skin-facing side of the pair of waistbands, and in the left-right central portion of the absorbent article, the bottom end of the laminated nonwoven fabric in the top-down direction overlaps with the absorbent core when viewed in the thickness direction of the laminated nonwoven fabric, and in the central portion and the bottom end of the laminated nonwoven fabric, the laminated nonwoven fabric, the hydrophobic sheet, and the top sheet are arranged in this order from the skin side.

[0032] According to the twelfth aspect, by disposing the laminated nonwoven fabric around the waist where sweat is likely to be released, a large amount of sweat can be absorbed. In addition, by providing a hydrophobic sheet between the top sheet and the laminated nonwoven fabric, even if a part of the laminated nonwoven fabric overlaps with the absorbent core, it is possible to effectively prevent excreted liquid (body fluid) discharged into the absorbent body (absorbent core) from moving along the top sheet and diffusing into the laminated nonwoven fabric (so-called liquid return). This makes it possible to prevent excreted liquid from coming into contact with the skin and damaging its cleanliness.

[0033] Aspect 13 is an absorbent article described in any of aspects 9 to 11, having a pair of waistbands, wherein the laminated nonwoven fabric is provided on at least a portion of the skin-facing side of the pair of waistbands and is positioned at a distance from the absorbent core.

[0034] According to aspect 13, by placing the laminated nonwoven fabric around the waist area where sweat is likely to be produced, a large amount of sweat can be absorbed, and by placing the laminated nonwoven fabric at a position away from the absorbent core, excretory liquid absorbed in the absorbent core is prevented from migrating and diffusing toward the laminated nonwoven fabric.

[0035] Aspect 14 is an absorbent article described in aspect 9, in which a skin-side core wrap sheet is arranged adjacent to the skin-side of the absorbent core in the absorbent body, and the laminated nonwoven fabric is arranged on the skin-side of the skin-side core wrap sheet so that the first layer of the laminated nonwoven fabric contacts the wearer's skin when in use.

[0036] According to the fourteenth aspect, by arranging the laminated nonwoven fabric in such a position, for example, if the absorbent article is a disposable diaper or sanitary napkin, it can absorb moisture including sweat from the buttocks and genitals that have become softened due to excreted fluids (body fluids such as urine), and the hydrophilic gradient of the laminated nonwoven fabric can promote the migration of moisture to the absorbent core side, improving the diffusion of sweat and the like and suppressing the occurrence of skin troubles.

[0037] Aspect 15 is an absorbent article described in any of aspects 9 to 14, wherein the laminated nonwoven fabric has an intermediate layer between the first layer and the second layer, and the intermediate layer is colored.

[0038] According to the fifteenth aspect, the intermediate layer is colored, so that the visibility of the laminated nonwoven fabric in the absorbent article can be improved, making it easier for users to recognize the presence of the laminated nonwoven fabric.

[0039] === Implementation form === The laminated nonwoven fabric of the present invention will be described in detail below with reference to the drawings. <Basic configuration of laminated nonwoven fabric 100> Fig. 1 is a schematic cross-sectional view of the laminated nonwoven fabric 100. Fig. 2 is an enlarged cross-sectional view of a portion of Fig. 1. Fig. 3 is a diagram illustrating the absorption of sweat in the laminated nonwoven fabric 100.

[0040] The laminated nonwoven fabric 100 of the present embodiment is a laminated nonwoven fabric for absorbent articles, and is particularly suitable as a sheet in an absorbent article that absorbs sweat from a wearer.

[0041] 1, the laminated nonwoven fabric 100 of this embodiment is a three-layer laminate including a first layer 101, a second layer 102 located on the opposite side of the first layer 101, and an intermediate layer 103 located between the first layer 101 and the second layer 102. When the laminated nonwoven fabric 100 is used in an absorbent article, the first layer 101 is the layer located on the skin side of the laminated nonwoven fabric, and the second layer 102 is the layer located on the non-skin side of the laminated nonwoven fabric.

[0042] The basis weight of the first layer 101 in the laminated nonwoven fabric 100 is preferably 12.5 g / m 2 The thickness of the first layer 101 is preferably 0.05 to 0.4 mm, and more preferably 0.1 to 0.3 mm. The basis weight of the second layer 102 is preferably 12.5 g / m 2 The thickness of the second layer 102 is preferably 0.05 to 0.4 mm, and more preferably 0.03 to 0.09 mm. The basis weight of the third layer 103 is preferably 20 g / m 2 The third layer 103 preferably has a thickness of 0.03 to 0.09 mm.

[0043] The outer shape, various dimensions, basis weight, etc. of the laminated nonwoven fabric 100 can be any outer shape, various dimensions, basis weight, etc. that correspond to the various components of the absorbent article to which the laminated nonwoven fabric 100 is applied.

[0044] The first layer 101 in the laminated nonwoven fabric 100 has first fibers 101a which are hydrophilic fibers, and the second layer 102 has second fibers 102a which are hydrophilic fibers. In the laminated nonwoven fabric 100 of the present embodiment, the hydrophilic fibers (first fibers 101a, second fibers 102a) contained in the first layer 101 and the second layer 102 are entangled with the pulp (here, pulp fibers 103a) contained in the intermediate layer 103. As shown in FIG. 1, in the laminated nonwoven fabric 100, at least a part of the first fibers 101a in the first layer 101 and at least a part of the second fibers 102a in the second layer 102 are entangled with each other. As a method for integrating the first layer 101, the second layer 102, and the intermediate layer 103 by entanglement, for example, a known hydroentanglement method using a water jet or the like can be used.

[0045] The types of the first fibers 101a and the second fibers 102a as hydrophilic fibers are not particularly limited, but in the laminated nonwoven fabric 100 of this embodiment, the hydrophilicity of the first fibers 101a is lower than that of the second fibers 102a. Therefore, the first fibers 101a are preferably, for example, polyethylene terephthalate (PET) fibers whose fiber surfaces have been hydrophilized. In addition, the second fibers 102a, which are fibers having higher hydrophilicity than the first fibers 101a, are preferably, for example, regenerated cellulose fibers such as rayon and fibril rayon, natural cellulose fibers such as cotton and crushed pulp, and rayon fibers are preferably used because of their excellent liquid diffusibility, strength after entanglement, and versatility. As the intermediate layer 103, it is preferable to use a pulp sheet containing at least pulp fibers. Examples of the pulp fibers include wood pulp and non-wood pulp. Examples of wood pulp include softwood pulp and hardwood pulp, and examples of non-wood pulp include cotton pulp, hemp pulp, straw pulp, bamboo pulp, bagasse pulp, reed pulp, and kenaf pulp.

[0046] The hydrophilicity of the first fibers 101a and the second fibers 101b can be evaluated by the following method. <Method for evaluating hydrophilicity> A sample is prepared by placing the first fiber 101a and the second fiber 101b on an acrylic plate so that the fibers have the same thickness and basis weight and form a sheet shape of 100 mm x 100 mm square. 0.05 mL of colored water is dropped onto the sample from 30 mm above. After 10 minutes, the diffusion area of ​​the colored water is measured using an image analyzer. The larger the measured value obtained, the higher the hydrophilicity of the liquid.

[0047] As shown in Fig. 3, when the laminated nonwoven fabric 100 is used as a sweat-absorbing sheet, sweat (x) on the skin is first absorbed from the first layer 101 side (see Fig. 3(a)), and the absorbed sweat (x) passes through the intermediate layer 103 and quickly migrates to the second layer 102 side (see Fig. 3(b)). Due to the excellent diffusivity of the second fibers 102a of the second layer 102, the sweat (x) diffuses within the laminated nonwoven fabric 100 (see Fig. 3(c)), and then evaporates from the second layer 102.

[0048] Conventionally, there is a technology for promoting the transfer of sweat from the skin side to the non-skin side by using a laminate having multiple layers (or sheet materials) with different sweat absorption properties as described above. However, when multiple layers are bonded by, for example, adhesives or heat sealing, the bonded portion may hinder the transfer and diffusion of sweat. In this respect, in the laminated nonwoven fabric 100 of the present embodiment, each fiber constituting the laminated nonwoven fabric 100 is integrated by intertwining, and further, as shown in FIG. 1, at least a part of the first fiber 101a of the first layer 101 and at least a part of the second fiber 102a of the second layer 102 are intertwined with each other. Since the hydrophilicity of the first fiber 101a is lower than that of the second fiber 102a, a hydrophilicity gradient is formed at the point (intertwining point Q) where the first fiber 101a and the second fiber 102a are intertwined, as shown in FIG. 2, and this makes it easier to draw sweat attached to the skin from the first fiber 101a side to the second fiber 102a side. The "intertwining point" means a point where the fibers are entangled and in contact with each other, but are not fused to each other. By facilitating drawing in from the first fibers 101a to the second fibers 102a, sweat adhering to the skin can be quickly transferred from the skin side to the non-skin side and diffused. By improving the diffusion of sweat, the occurrence of skin troubles such as eczema, heat rash, and rash can be suppressed when the laminated nonwoven fabric 100 is used in an absorbent article.

[0049] Although the laminated nonwoven fabric 100 in this embodiment has the first layer 101, the second layer 102, and the intermediate layer 103, the intermediate layer 103 is not necessarily provided. In other words, as long as the laminated nonwoven fabric 100 has at least the first layer 101 having the first fibers 101a and the second layer 102 having the second fibers 102a, a hydrophilicity gradient is formed in the laminated nonwoven fabric 100 such that the hydrophilicity of the first layer 101 made of the first fibers 101a is lower than the hydrophilicity of the second layer 102 made of the second fibers 102a, and sweat adhering to the skin can be guided from the first layer 101 to the second layer 102, improving the absorption property.

[0050] As described above, the laminated nonwoven fabric 100 of this embodiment is preferably configured such that the first fibers 101a are polyethylene terephthalate (PET) fibers that have been subjected to a hydrophilic treatment, and the second fibers 102a are rayon fibers. Rayon fibers have better hydrophilicity and diffusibility than polyethylene terephthalate (PET) fibers, and therefore it is easier to create a hydrophilic gradient that draws moisture from the first layer 101 to the second layer 102 through the interwoven points Q. This can improve the migration and diffusion of sweat from the first layer 101 to the second layer 102.

[0051] As shown in FIG. 1, the first layer 101, the intermediate layer 103, and the second layer 102 are laminated in the thickness direction. In the thickness direction, when the side of the laminated nonwoven fabric 100 that contacts the wearer during use is the skin side, and the opposite side is the non-skin side, at least a part of the second fibers 102a of the second layer 102 is present on the same plane as the skin side surface of the first layer 101 (see the skin side portion 102ax in FIG. 1). Since the second fibers 102a are more hydrophilic than the first fibers 101a, the portion (skin side portion 102ax) that is present on the same plane as the skin side surface of the first layer 101 is more likely to absorb moisture (sweat). By improving the moisture absorption, sweat is more likely to be transferred quickly to the non-skin side.

[0052] Here, a laminated nonwoven fabric in which a first layer 101 having PET fibers as the first fibers 101a, a second layer 102 having rayon fibers as the second fibers 102a, and a third layer 103 made of pulp fibers 103a are laminated is used as an example, and a laminated nonwoven fabric in which the first and second layers are both made of PET fibers and a third layer made of pulp fibers is disposed between the first and second layers is used as a comparison example, and the sweat diffusibility and amount of sweat remaining on the skin of each laminated nonwoven fabric are compared.

[0053] Fig. 4 shows photographs of the surfaces of the laminated nonwoven fabrics of the Examples and Comparative Examples in the diffusion test, and Fig. 5 is a bar graph showing the amount of sweat remaining on the skin in the Examples and Comparative Examples.

[0054] First, the following test was carried out to compare the sweat diffusion of the laminated nonwoven fabrics of the Examples and Comparative Examples. As shown in FIG. 4(a), artificial skin (PBZ13001, manufactured by Idemitsu Technofine Co., Ltd.) was used as skin, and water (droplets) were dropped onto the artificial skin at a predetermined interval at 4 x 5 locations, a total of 20 locations. Next, samples of each laminated nonwoven fabric cut to a size that can cover all the dropped water were placed on the artificial skin so as to cover the water (FIG. 4(b)). FIG. 4(c1) to FIG. 4(c3) show photographs of the surface of the laminated nonwoven fabric of the Comparative Example after it was placed on the artificial skin 1 second later (FIG. 4(c1)), 3 seconds later (FIG. 4(c2)), and 5 seconds later (FIG. 4(c3)). In addition, Fig. 4(d1) to Fig. 4(d3) show photographs of the surface of the laminated nonwoven fabric of the embodiment after placing it on the artificial skin 1 second later (Fig. 4(d1)), 3 seconds later (Fig. 4(d2)), and 5 seconds later (Fig. 4(d3)). In Fig. 4(c1) to Fig. 4(d3), the state of the 20 droplets absorbed by each laminated nonwoven fabric can be confirmed, and in particular, when comparing the photographs after 3 seconds ((c2) and (d2)) and 5 seconds ((c3) and (d3)), it can be confirmed that the absorbed water is diffused over time in the embodiment, and the granular water becomes difficult to see. On the other hand, in the comparative example, even after 5 seconds (Fig. 4(c3)), the presence of the 20 droplets can still be seen, and it can be seen that each droplet is bleeding. In other words, it can be seen that the absorbed sweat is diffused faster in the laminated nonwoven fabric of the embodiment, and it has excellent diffusibility.

[0055] Next, in the above-mentioned test, each laminated nonwoven fabric was placed on the artificial skin, and after 5 seconds, each laminated nonwoven fabric was peeled off from the artificial skin, and the amount of water remaining on the artificial skin was measured. The amount of water remaining on the artificial skin was considered to be the amount of sweat remaining on the skin, and the results of the comparative example and the example are shown in FIG. 5. The numerical values ​​shown in FIG. 5 are the average values ​​of five similar measurements. As a result of the measurement, the amount of water (sweat) remaining in the comparative example was 0.0074 mL, and the amount of water (sweat) remaining in the example was 0.0006 mL. In other words, it can be seen that the laminated nonwoven fabric of the example absorbed more sweat and left less sweat on the skin. By leaving less sweat on the skin, it is possible to better prevent skin troubles caused by sweat.

[0056] As described above, since the laminated nonwoven fabric 100 of the present embodiment has excellent sweat absorption and diffusion properties, when used in an absorbent article, the laminated nonwoven fabric 100 is preferably used on the surface that comes into contact with the user's skin. This makes it easier to quickly absorb sweat adhering to the user's skin, and makes it easier to suppress the occurrence of skin troubles such as eczema and heat rash.

[0057] Furthermore, when a laminated nonwoven fabric is formed by bonding two layers of sheet materials with different sweat absorption performance with adhesive, heat sealing, high frequency sealing, ultrasonic sealing, or the like as in the past, there is a risk that moisture (sweat) will not easily transfer at such bonded portions, but in this regard, the laminated nonwoven fabric 100 of the present embodiment does not contain adhesive and does not have portions where the first fibers 101a and the second fibers 102a are fused to each other. By adopting a configuration that does not include adhesive or portions where the fibers are fused to each other, sweat can be smoothly transferred from the first fibers 101a (first layer 101) to the second fibers 102a (second layer 102).

[0058] In the laminated nonwoven fabric 100, the average coefficient of friction of the first layer 101 is smaller than the average coefficient of friction of the second layer 102. The average coefficient of friction (MIU) is an index indicating the texture of the surfaces of the first layer 101 and the second layer 102, and the larger the value, the greater the resistance of the surface, meaning that it is rough and easy to get caught, and the smaller the value, the smaller the resistance of the surface, meaning that it is smooth. The coefficient of friction can be measured, for example, using KES-FB4 manufactured by Kato Tech Co., Ltd. The first layer 101 is a layer located on the skin-facing side of the laminated nonwoven fabric 100, that is, when the laminated nonwoven fabric 100 is used on the surface (skin-facing side) that comes into contact with the skin of the user, the first layer 101 is a layer that constitutes the skin-facing side. Since the average coefficient of friction of the first layer 101 is small, the surface of the first layer 101 is smooth, and the area in contact with the skin is increased, thereby improving the sweat absorption performance.

[0059] Furthermore, in the laminated nonwoven fabric 100, the water retention capacity of the intermediate layer 103 is higher than that of the first layer 101, and the water retention capacity of the second layer 102 is higher than that of the intermediate layer 103. In other words, the structure has a structure in which the water retention capacity increases from the skin side to the non-skin side (progressing from the first layer 101 to the intermediate layer 103 to the second layer 102).

[0060] <Water retention evaluation method> In this regard, the water retention of each of the first layer 101, the intermediate layer 103, and the second layer 102 can be evaluated by carrying out the following test. (Preparation of evaluation samples) A sheet is prepared in which the PET fibers, which are the first fibers 101a constituting the first layer 101, are intertwined, and has the same basis weight and thickness as the above-mentioned first layer 101. Similarly, a sheet is prepared in which the rayon fibers, which are the second fibers 102a constituting the second layer 102, are intertwined, and has the same basis weight and thickness as the above-mentioned second layer 102, and a sheet is prepared in which the pulp fibers, which are the fibers 103a constituting the third layer 103, are intertwined, and has the same basis weight and thickness as the above-mentioned third layer 103. Each sheet is cut into a square measuring 140 mm x 60 mm, to prepare three samples of each. (Measurement method) (1) Prepare three trays large enough to hold one sample and at least 5 cm high, as well as an electronic balance, a wire mesh (#10), a weight (840 g), water, kitchen paper, a cooking tray, and a corresponding mesh. (2) Place three sheets of kitchen paper on top of each cooking tray and then place a corresponding wire rack on top of them to use as a draining tray. (3) Pour water into the tray to a depth of 3cm. (4) Measure the weight of the sample. (A) (5) Measure the weight of the wire mesh. (6) Take one sample with tweezers and place it on the wire mesh. (7) Place the sample on a wire mesh and leave it in water for 3 minutes. (8) Quickly remove the wire mesh and sample together, place them on a draining tray, and leave them there for 5 minutes. (9) After 5 minutes, hold both ends of the wire mesh and move it to an electronic scale to measure its weight. (10) Pick up the sample with tweezers, move it onto a draining tray, place a weight on it to prevent wrinkles, and leave it for 3 minutes. (11) Remove the weight, pick up the sample with tweezers, and move the wire mesh and sample together to an electronic balance and measure the weight. (B) (12) Repeat steps (7) to (11) above for the specified number of samples. (How to calculate water retention capacity) g / m 2 =(BA)÷0.06÷0.14 (A is the sample weight, B is the weight of the sample after weighting)

[0061] The water retention capacity of each layer is calculated by the above-mentioned calculation method, and a larger value indicates higher water retention. In the laminated nonwoven fabric 100, the relationship of water retention capacity is first layer 101<middle layer 103<second layer 102, so that a gradient of water retention can be provided from the skin side to the non-skin side of the laminated nonwoven fabric 100, and absorbed sweat can easily move from the first layer 101 through the middle layer 103 to the second layer 102 side. As a result, sweat can be prevented from accumulating in the first layer 101. By preventing sweat from accumulating on the skin, the occurrence of skin troubles can be prevented.

[0062] Moreover, in the laminated nonwoven fabric 100 of this embodiment, the intermediate layer 103 contains an antibacterial agent. Any antibacterial agent can be used as long as it can at least inhibit the growth of Staphylococcus epidermidis in sweat, but a particularly preferred antibacterial agent is, for example, cetylpyridinium chloride (CPC), which is a quaternary ammonium salt. When the intermediate layer 103 contains an antibacterial agent, it can exert an antibacterial effect on sweat absorbed and retained in the intermediate layer 103, and can inhibit the growth of bacteria in the retained sweat. Bacteria that tend to grow due to sebum and the like are likely to cause skin troubles, but inhibiting the growth of such bacteria can inhibit the occurrence of eczema, heat rash, rashes, and the like.

[0063] <<About absorbent articles>> In the following, a case where the laminated nonwoven fabric 100 of the present invention is applied to an absorbent article will be described, taking as an example a pants-type disposable diaper 1 (hereinafter also simply referred to as "diaper 1"). In this diaper 1, the laminated nonwoven fabric 100 is used as a strip-shaped sweat-absorbent sheet (sweat-absorbent sheet 50 described below) arranged around the waist. However, the laminated nonwoven fabric 100 is not limited to being arranged around the waist of pants-type disposable diapers, and can also be applied to other absorbent articles such as other types of diapers, absorbent pads for diapers, sanitary napkins, vaginal discharge liners, urine pads, masks, etc.

[0064] Fig. 6 is a schematic perspective view of the diaper 1 as viewed from the abdominal side. Fig. 7 is a schematic plan view of the diaper 1 in an unfolded and stretched state as viewed from the wearer's skin side. Fig. 8 is a schematic cross-sectional view taken along line II in Fig. 7.

[0065] The "unfolded state" of the diaper 1 refers to a state in which the diaper 1 in the pants-type state shown in Fig. 6 is unfolded at side joints 5 (described later) on both the left and right sides to separate the ventral waist portion 20 (described later) and the rear waist portion 30 (described later), and the diaper 1 is opened vertically, thereby unfolding the diaper 1 on a flat surface. The "stretched state" of the diaper 1 refers to a state in which the product (diaper 1) is stretched without wrinkles, specifically, a state in which the dimensions of each of the components constituting the diaper 1 (e.g., the absorbent body 10, the ventral waist portion 20, etc.) are stretched to the extent that they match or are close to the dimensions of the individual components.

[0066] In the pants-type state (worn state) as shown in FIG. 6, the diaper 1 has a vertical direction, a horizontal direction, and a front-rear direction that intersect with each other, and has a waist opening BH and a pair of leg openings LH. In the vertical direction, the waist opening BH side is the upper side, and the side that corresponds to the wearer's crotch is the lower side. In the front-rear direction, the side that corresponds to the wearer's abdominal side is the front side, and the side that corresponds to the back side is the back side. In the unfolded and extended state shown in FIG. 7, the diaper 1 has three mutually orthogonal directions, namely, a longitudinal direction, a horizontal direction, and a thickness direction (a direction penetrating the paper in FIG. 2). The longitudinal direction is along the above-mentioned vertical direction. One side of the longitudinal direction corresponds to the abdominal side (front side), and the other side corresponds to the back side (rear side). In addition, the diaper 1 has a thickness direction in which materials are layered as shown in FIG. 8, and the side in the thickness direction that contacts the wearer is the skin side, and the opposite side is the non-skin side.

[0067] The diaper 1 also has an absorbent body 10 and a pair of waist-circulating sections 20, 30 that are placed around the waist of a wearer. Of the pair of waist-circulating sections 20, 30, the one that is placed against the wearer's abdominal side is referred to as the abdominal waist-circulating section 20, and the other that is placed against the wearer's dorsal side is referred to as the dorsal waist-circulating section 30.

[0068] In the unfolded diaper 1 shown in Fig. 7, one end of the absorbent main body 10 in the longitudinal direction is disposed in the center of the ventral waist portion 20 in the left-right direction, and the non-skin side of the one end is joined to the ventral waist portion 20 by an adhesive such as a hot melt adhesive. Similarly, the other end of the absorbent main body 10 in the longitudinal direction is disposed in the center of the dorsal waist portion 30 in the left-right direction, and the non-skin side of the other end is joined to the dorsal waist portion 30 by an adhesive such as a hot melt adhesive.

[0069] Then, the absorbent body 10 is folded in half at approximately the center in the longitudinal direction so that the longitudinal direction of the absorbent body 10 is aligned with the top-to-bottom direction of the diaper 1, and both side ends of the ventral waist portion 20 and both side ends of the dorsal waist portion 30 in the left-right direction of the diaper 1 are joined by heat welding, ultrasonic welding, or the like to form a pair of side joints 5, thereby resulting in the diaper 1 in a pants-type state as shown in Figure 6.

[0070] As shown in Figure 8, the absorbent body 10 has an absorbent core 11, a liquid-permeable top sheet 12 arranged on the skin side of the absorbent core 11, a liquid-impermeable back sheet 13 arranged on the non-skin side of the absorbent core 11, and an outer sheet 14 arranged on the non-skin side of the back sheet 13.

[0071] The absorbent core 11 may be any material capable of absorbing and retaining excreted liquids such as urine, and may be, for example, a liquid-absorbent fiber such as pulp containing superabsorbent polymer (SAP) molded into a predetermined shape. The absorbent core 11 is covered with a liquid-permeable core wrap sheet 16, and examples of the core wrap sheet 16 include tissue paper and nonwoven fabric. The top sheet 12 is formed of a nonwoven fabric such as an air-through nonwoven fabric or a spunbond nonwoven fabric. The back sheet 13 is a film that is liquid-impermeable and breathable, such as polyethylene or polypropylene. The exterior sheet 14 is formed of, for example, the same nonwoven fabric as the top sheet 12.

[0072] Side sheets 15 are provided at both left-right end portions of the exterior sheet 14. The side sheets 15 extend outward in the left-right direction farther than the exterior sheet 14 and are folded back inward at outer ends 15es, 15es as folding back positions to form side flaps SF of the diaper 1.

[0073] The side flaps SF are provided so as to protrude outward in the left-right direction along the leg openings LH as shown in Fig. 6. In this embodiment, a plurality of leg elastic members 17, 17... made of rubber thread or the like are fixed at a predetermined interval in the left-right direction between the side sheets 15, 15 folded in the thickness direction, each stretched in the up-down direction (longitudinal direction) (see Fig. 7). This provides the side flaps SF with stretchability in the up-down direction (longitudinal direction of the absorbent body 10). That is, stretchability is provided along the leg openings LH.

[0074] A pair of leakage prevention walls 70, 70 are provided on both left-right sides of the absorbent core 11. One or more leakage prevention wall elastic members 18 made of rubber thread or the like are fixed to the left-right inner ends of the leakage prevention walls 70 in a vertically (longitudinal) stretched state (see FIG. 7). When the diaper 1 is worn, the leakage prevention walls 70 rise up from both left-right sides of the absorbent core 11 toward the wearer's skin based on the stretchability of the leakage prevention wall elastic members 18, thereby preventing excrement from leaking out of the absorbent main body 10 (side leakage).

[0075] As shown in FIG. 8, the ventral waist portion 20 and the back waist portion 30 each have a skin side sheet 21, 31, a non-skin side sheet 22, 32 laminated on the skin side sheet 21, 31, and a plurality of thread-like elastic members 23, 33.

[0076] The non-skin side sheets 22, 32 are disposed closer to the skin than the skin side sheets 21, 31. The skin side sheets 21, 31 and the non-skin side sheets 22, 32 are disposed closer to the skin than the absorbent main body 10. The non-skin side sheets 22, 32 each have a folded-back portion 221, 321 whose upper end is folded back to the lower side and to the skin side in the up-down direction at the upper end 20eu of the ventral waistline portion 20 and the upper end 30eu of the dorsal waistline portion 30 (see FIG. 8). The folded-back portion 221, 321 of the non-skin side sheets 22, 32 may cover the longitudinal end of the absorbent main body 10 from the skin side.

[0077] The skin side sheets 21, 31 and the non-skin side sheets 22, 32 are non-stretchable sheets that have substantially no stretchability in the left-right direction. For the skin side sheets 21, 31 and the non-skin side sheets 22, 32, SMS nonwoven fabric (spunbond / meltblown / spunbond nonwoven fabric), spunbond nonwoven fabric, air-through nonwoven fabric, plastic sheet, perforated plastic sheet, laminate sheet thereof, or the like can be used.

[0078] The multiple thread-like elastic members 23, 33 are arranged side by side in the up-down direction between the skin side sheets 21, 31 and the non-skin side sheets 22, 32, and are fixed in a stretched state in the left-right direction. Therefore, the ventral waist portion 20 and the back waist portion 30 stretch in the left-right direction to fit the waist of the wearer. Examples of the thread-like elastic members 23, 33 include thread-like elastic members (so-called thread rubber) such as rubber and spandex.

[0079] In the back waist portion 30 of this embodiment, a thread-like elastic member 33 is arranged from the upper end to the lower end. On the other hand, the thread-like elastic member 23 is not arranged at the upper end of the ventral waist portion 20, and instead, a flat (strip-like) elastic sheet 24 that stretches in the left-right direction is arranged. For the elastic sheet 24, for example, a spunbond nonwoven fabric, an air-through nonwoven fabric, a needle punch nonwoven fabric, or other elastic fiber fabric manufactured by various known manufacturing methods, made from elastic fibers made of thermoplastic elastomer, rubber, or the like, can be used. Note that the configuration of the ventral waist portion 20 is not limited to this, and the thread-like elastic member 23 may be arranged from the upper end to the lower end of the ventral waist portion 20.

[0080] In this embodiment, the ventral waist portion 20 and the back waist portion 30 each have a cover sheet 25, 35, as shown in Fig. 7 and Fig. 8. The cover sheets 25, 35 are arranged closer to the skin than the absorbent main body 10, are shorter in the vertical direction than the skin side sheets 21, 31, etc., and are strip-shaped sheets arranged to cover the longitudinal ends of the absorbent main body 10. A soft sheet such as a nonwoven fabric is used as the material for the cover sheet, but it is preferable that at least the cover sheet 35 arranged on the back waist portion 30 is a strip-shaped hydrophobic sheet.

[0081] Here, in this embodiment, "hydrophobic" means that the measured water diffusion area of ​​the laminated nonwoven fabric 100 is smaller (has low hydrophilicity) than that obtained by the above-mentioned hydrophilicity evaluation method. In other words, the measured water diffusion area of ​​the cover sheet 35 obtained by the above-mentioned evaluation method is smaller than that of the laminated nonwoven fabric 100, and the cover sheet 35 has hydrophobicity. The cover sheet 35, which is a hydrophobic sheet, does not retain body fluids such as sweat, but allows moisture to escape, improving breathability, and thereby reducing stuffiness when worn.

[0082] In addition, a sweat-absorbent sheet 50 is provided in a predetermined region on the skin side of the back waist portion 30 (hatched area in Figs. 7 and 8). The region where the sweat-absorbent sheet 50 is provided is a portion that is more likely to absorb sweat of the wearer than other regions. In this embodiment, the above-mentioned laminated nonwoven fabric 100 is used as the sweat-absorbent sheet 50. That is, the sweat-absorbent sheet 50 (laminated nonwoven fabric) has a first layer, an intermediate layer, and a second layer, and the first layer is arranged so as to contact the skin of the wearer, and the second layer is arranged on the absorbent main body 10 side. This allows sweat absorbed from the first layer of the sweat-absorbent sheet 50 to pass through the intermediate layer 103 and quickly migrate and diffuse to the second layer 102 side, i.e., from the skin side to the non-skin side. Therefore, by providing the sweat-absorbing sheet 50 on a portion of the skin-facing side of the rear waist portion 30, sweat is easily absorbed and diffused in the rear waist region of the wearer, which is prone to high sweat production, when the diaper 1 is worn, thereby preventing skin problems such as stuffiness and rashes caused by sweat.

[0083] In this embodiment, the sweat absorbent sheet 50 is disposed on the skin side of the cover sheet 35, but it is not necessarily required to dispose it on the skin side of the cover sheet 35, and for example, a configuration may be adopted in which the cover sheet 35 is not provided. Also, the sweat absorbent sheet 50 is preferably provided on at least a portion of the skin facing side of the pair of waistbands (ventral waistband 20, dorsal waistband 30).

[0084] 7 and 8, in the diaper 1 of this embodiment, the sweat-absorbent sheet 50 is disposed at a position spaced apart from the absorbent core 11. By disposing the sweat-absorbent sheet 50 in at least a part of the waist portion (the ventral waist portion 20 and the dorsal waist portion 30) where sweat is likely to be released, a large amount of sweat can be effectively absorbed, and further, by disposing the sweat-absorbent sheet 50 at a position spaced apart from the absorbent core 11, excreted liquid absorbed in the absorbent core 11 is prevented from migrating (so-called liquid return) and diffusing toward the sweat-absorbent sheet 50.

[0085] As described above, the back waist portion 30 may not be provided with the cover sheet 35, and in that case, at the left-right center of the diaper 1 and at the bottom end 50ed of the sweat-absorbent sheet 50 in the vertical direction, the sweat-absorbent sheet 50 and the top sheet 12 are arranged in this order from the skin side in the thickness direction. By arranging the sweat-absorbent sheet 50 and the liquid-permeable top sheet 12 in this order from the skin side at the bottom end 50ed, even when the sweat-absorbent sheet 50 absorbs a large amount of sweat, the sweat can be transferred from the sweat-absorbent sheet 50 through the top sheet 12 to the non-skin side, thereby preventing the sweat from returning to the skin.

[0086] In addition, in the case of such an arrangement (the sweat absorbent sheet 50 and the top sheet 12 are arranged in this order from the skin side), it is desirable that the hydrophilicity of the second layer in the sweat absorbent sheet 50 (laminated nonwoven fabric) is higher than that of the top sheet 12. The second layer is a layer that constitutes the non-skin side of the sweat absorbent sheet 50, that is, a layer that contacts the top sheet 12 at the lower end 50ed. Such a second layer having a higher hydrophilicity than the top sheet 12 can prevent sweat absorbed in the sweat absorbent sheet 50 from excessively migrating to the top sheet 12 side. The hydrophilicity of each sheet can be measured by the method of measuring the water diffusion area described above, and the larger the measured value, the higher the hydrophilicity. However, since it is sufficient to confirm the relationship in magnitude between the hydrophilicity of the sweat absorbent sheet 50 and the top sheet 12, it is not necessary to obtain a strict value, and some error in the measured value is acceptable.

[0087] FIG. 9 is a partial cross-sectional view showing a modified arrangement of the sweat-absorbent sheet 50 and the cover sheet 35. As shown in FIG. 8, in this embodiment, the sweat-absorbent sheet 50 and the cover sheet 35 are not overlapped with the absorbent core 11 in the thickness direction, that is, are arranged at a position separated from the absorbent core 11, but this is not limited thereto. In the modified example shown in FIG. 9, in the center of the left-right direction of the diaper 1, the lower end 50ed in the vertical direction of the sweat-absorbent sheet 50 (laminated nonwoven fabric) overlaps with the absorbent core 11 in the thickness direction of the sweat-absorbent sheet 50. At the lower end 50ed of the sweat-absorbent sheet 50, the sweat-absorbent sheet 50, the cover sheet 35, and the top sheet 12 are arranged in this order from the skin side. The cover sheet 35 is a hydrophobic sheet as in this embodiment, that is, at the lower end 50ed, the sweat-absorbent sheet 50, the hydrophobic sheet (cover sheet 35), and the top sheet 12 are arranged in this order from the skin side. Even in the configuration in which the lower end portion 50ed of the sweat-absorbent sheet 50 overlaps the absorbent core 11 as in this modified example, the presence of a hydrophobic sheet (cover sheet 35) between the top sheet 12 and the sweat-absorbent sheet 50 can effectively prevent excreted liquid such as urine discharged into the absorbent main body 10 (absorbent core 11) from migrating (so-called liquid return) along the top sheet 12 to the sweat-absorbent sheet 50. This can prevent excreted liquid from coming into contact with the skin and damaging its cleanliness.

[0088] In the modified example of Figure 9, a cover sheet 35 is used as the hydrophobic sheet, but this is not limited to this. For example, the folded-back portion 321 of the non-skin side sheet 32 ​​that is folded back to the skin side may be extended downward in the vertical direction so as to cover the upper end of the top sheet 12 from the skin side, and the folded-back portion 321 of the non-skin side sheet 32 ​​may be used as the hydrophobic sheet.

[0089] 6 and 7, in this embodiment, the sweat-absorbent sheet 50 constitutes a part of the surface of the back waist portion 30 that comes into contact with the wearer's skin. The sweat-absorbent sheet 50 (laminated nonwoven fabric) has an intermediate layer between the first layer and the second layer, and the intermediate layer is preferably colored. Specifically, the intermediate layer may have a color different from the skin-side sheet 31 and the non-skin-side sheet 32 ​​that constitute the back waist portion 30. For example, when the skin-side sheet 31 is white, the sweat-absorbent sheet 50 is configured in blue. In this way, it is possible to easily allow the user (the wearer of the diaper 1 or the person putting the diaper on) to visually recognize that the sweat-absorbent sheet 50 is provided in the diaper 1 (back waist portion 30).

[0090] ===Other=== The above-mentioned embodiment is for the purpose of facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention can be modified or improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof.

[0091] In the above embodiment, the laminated nonwoven fabric 100 is used as the sweat-absorbing sheet 50 in the diaper 1, but is not limited thereto. For example, the laminated nonwoven fabric 100 may be used as the top sheet 12. In this case, the core wrap sheet 16 is provided in the absorbent body 10 so as to cover the absorbent core 11. When the part of the core wrap sheet 16 arranged adjacent to the skin side of the absorbent core 11 is designated as the skin-side core wrap sheet 16a and the part arranged adjacent to the non-skin side is designated as the non-skin-side core wrap sheet 16b (see FIG. 8), the laminated nonwoven fabric is arranged on the skin side of the skin-side core wrap sheet 16a so that the first layer of the laminated nonwoven fabric as the top sheet 12 contacts the wearer's skin when the diaper 1 is used. By using the laminated nonwoven fabric as the top sheet 12, moisture including sweat around the buttocks and genitals that has become soft due to excreted fluid (urine, etc.) can be effectively absorbed, and the hydrophilic gradient of the laminated nonwoven fabric can promote the migration of moisture to the absorbent core 11 side. By improving the diffusion of moisture such as sweat, the occurrence of skin problems is suppressed.

[0092] In the above embodiment, the sweat absorbent sheet 50 is disposed in a portion of the back waist 30, but this is not limiting, and for example, the sweat absorbent sheet 50 may be disposed only in the ventral waist 20, or in both the ventral waist 20 and the back waist 30. When provided in both the ventral and back waist 20, 30, sweat can be absorbed more effectively throughout the entire waist.

[0093] The configuration of the diaper 1 in the above-mentioned embodiment is merely an example, and is not limited thereto. For example, in the diaper 1 in the above-mentioned embodiment, the ventral waist portion 20 and the rear waist portion 30 are made of different members, and the non-skin side of the absorbent body 10 is exposed in the crotch portion. However, the present invention is not limited thereto, and may be, for example, a diaper having an exterior member made of a single member that is continuous from the ventral waist portion 20 to the rear waist portion 30. [Explanation of symbols]

[0094] 1. Pants-type disposable diapers (absorbent articles) 5 Side Joint 10 Absorbent body 11 Absorbent core 12 Top sheet 13 Back Seat 14 Exterior sheet 15 Side seat 15es outer edge 16 Core wrap sheet 16a Skin side core wrap sheet 16b Non-skin side core wrap sheet 17 Elastic member around the legs 18 Leak-proof wall elastic members 20 Ventral waist 20eu upper end 21 Skin side sheet 22 Non-skin side sheet 23 Thread-like elastic member 24 Elastic Sheet 25 Cover Sheet 30 Back waist circumference 30eu upper end 31 Skin side sheet 32 Non-skin side sheet 33 Thread-like elastic member 35 Cover Sheet 50 Sweat-absorbing sheet (laminated nonwoven fabric) 50ed lower end 70 Leakage prevention wall section 100 Laminated nonwoven fabric 101 1st layer 101a First Fiber 101b Second Fiber 102 2nd layer 102a Second Fiber 102ax Skin side existing part 103 3rd layer

Claims

1. A laminated nonwoven fabric for an absorbent article, comprising a first layer having a first fiber and a second layer having a second fiber, the first layer is a layer located on a skin-facing side of the laminated nonwoven fabric, and the second layer is a layer located on a non-skin-facing side of the laminated nonwoven fabric, The hydrophilicity of the first fibers is lower than the hydrophilicity of the second fibers; At least a portion of the first fibers and at least a portion of the second fibers are entangled with each other. A laminated nonwoven fabric comprising:

2. The laminated nonwoven fabric according to claim 1, The first layer and the second layer are laminated in a thickness direction, In the thickness direction, the side that comes into contact with the wearer during use is the skin side, and the opposite side is the non-skin side. At least a portion of the second fibers are flush with the skin side surface of the first layer. A laminated nonwoven fabric comprising:

3. The laminated nonwoven fabric according to claim 1 or 2, The fiber does not include an adhesive, and the first fibers and the second fibers do not have any fused portions. A laminated nonwoven fabric comprising:

4. The laminated nonwoven fabric according to claim 1 or 2, The laminated nonwoven fabric is used on the surface of the absorbent article that comes into contact with the skin of the user. A laminated nonwoven fabric comprising:

5. The laminated nonwoven fabric according to claim 4, The average coefficient of friction of the first layer is less than the average coefficient of friction of the second layer. A laminated nonwoven fabric comprising:

6. The laminated nonwoven fabric according to claim 1 or 2, an intermediate layer between the first layer and the second layer; The water retention of the intermediate layer is higher than the water retention of the first layer, The second layer has a higher water retention than the intermediate layer. A laminated nonwoven fabric comprising:

7. The laminated nonwoven fabric according to claim 6, The intermediate layer includes an antimicrobial agent. A laminated nonwoven fabric comprising:

8. The laminated nonwoven fabric according to claim 1 or 2, The first fibers are polyethylene terephthalate (PET) fibers and the second fibers are rayon fibers. A laminated nonwoven fabric comprising:

9. An absorbent article having an absorbent body with an absorbent core, The laminated nonwoven fabric according to claim 1 or 2 is included. An absorbent article comprising:

10. 10. The absorbent article of claim 9, In a worn state, the upper and lower directions and the left and right directions intersect with each other, A pair of waistbands, In the absorbent body, a top sheet is disposed closer to the skin than the absorbent core, the laminated nonwoven fabric is provided on at least a portion of the skin-facing side of the pair of waistband portions and is disposed at a position spaced apart from the absorbent core, The laminated nonwoven fabric and the top sheet are disposed in this order from the skin side at a center portion in the left-right direction of the absorbent article and at a lower end portion in the up-down direction of the laminated nonwoven fabric. An absorbent article comprising:

11. 11. The absorbent article of claim 10, The hydrophilicity of the second layer of the laminated nonwoven fabric is higher than the hydrophilicity of the top sheet. An absorbent article comprising:

12. 10. The absorbent article of claim 9, In a worn state, the upper and lower directions and the left and right directions intersect with each other, A pair of waistbands, In the absorbent body, a top sheet is disposed closer to the skin than the absorbent core, The laminated nonwoven fabric is provided on at least a portion of the skin-facing side of the pair of waist portions, In the left-right central portion of the absorbent article, a lower end portion of the laminated nonwoven fabric in the up-down direction overlaps with the absorbent core as viewed in a thickness direction of the laminated nonwoven fabric, At the central portion and at the lower end portion of the laminated nonwoven fabric, the laminated nonwoven fabric, a hydrophobic sheet, and the top sheet are arranged in this order from the skin side. An absorbent article comprising:

13. 10. The absorbent article of claim 9, A pair of waistbands, The laminated nonwoven fabric is provided on at least a portion of the skin-facing side of the pair of waistband portions and is disposed at a position spaced apart from the absorbent core. An absorbent article comprising:

14. 10. The absorbent article of claim 9, In the absorbent body, a skin side core wrap sheet is disposed adjacent to the skin side of the absorbent core, The laminated nonwoven fabric is disposed on the skin side of the skin side core wrap sheet such that, in use, the first layer of the laminated nonwoven fabric contacts the skin of a wearer. An absorbent article comprising:

15. 10. The absorbent article of claim 9, The laminated nonwoven fabric has an intermediate layer between the first layer and the second layer, The intermediate layer is colored. An absorbent article comprising:

Images