Absorbent products

Abstract

Edited 27 / 10 / 2016 This invention provides an absorbent product with soft, reflective padding properties. Desirable properties include superior waste collection and fluid diffusion when compressed. Superior from the surface sheet to the absorbent product, the absorbent product has a surface sheet (2) which has The structure is a textured surface applied to the skin's surface of the product, which is absorbent and has protrusions. The first (21) protrudes toward the skin surface and the second (22) protrudes toward the clothing. On the back side of the skin surface and the absorbent component (4) is positioned at one location. The spoon is placed on top of the surface plate (2) in the picture, viewed from above the surface plate (2) and the absorbent component (4). Connected in a planar manner at the apex connection (22T) of the second protrusion. (22) --------------------- This invention provides an absorbent product with soft, reflective padding properties. Desirable properties include superior waste collection and fluid diffusion when compressed. Superior from surface pads to absorbent products, the absorbent product has a surface pad (2) which has The structure is a textured surface applied to the sheet side of the absorbent product and has protrusions. The first (21) protrudes towards the flat surface side and the second (22) protrudes towards the clothing side. On the back of the surface plate and the absorbent component (4) are positioned at one location. Overlapping with the surface plate (2) in the figure viewed from above the surface plate (2) and the absorbent component (4). Connected in a planar manner at the apex connection (22T) of the second protrusion. (22);

Description

The present invention relates to an absorbent article formed by joining a surface sheet having an uneven structure with an absorbent element. Absorbent items such as disposable diapers, sanitary napkins, and panty liners are typically used in direct contact with the user's skin, and some are worn for extended periods. Therefore, absorbent items need to be gentle on the skin and possess excellent absorbency and retention capabilities for liquids such as urine, menstrual blood, and excrement. Patent Document 1 discloses a technique for obtaining a surface sheet that constitutes the skin-facing surface of an absorbent article, which has soft cushioning properties, good recovery when pressed, excellent ability to collect excrement, and in particular excellent ability to draw in liquids. This technique involves using a nonwoven fabric with alternating first protrusions that protrude towards the first surface and second protrusions that protrude towards the second surface opposite to the first surface as the nonwoven fabric constituting the surface sheet. The uneven nonwoven fabric disclosed in Patent Document 1 is configured such that, in order to facilitate the smooth transfer of liquids such as excrement, the fiber density on the second surface side is lower than the fiber density on the first surface side at the top of the first protrusion, and the fiber density on the first surface side and the fiber density on the second surface side are substantially equal at the top of the second protrusion, so that the fiber density in the thickness direction of the uneven nonwoven fabric changes from sparse to dense from the skin side to the absorbent surface side. Japanese Patent Publication No. 2012-144835 However, when such an uneven nonwoven fabric is joined to the nonwoven fabric or tissue on the skin-facing side of the absorbent element, the fiber density on the uneven nonwoven fabric side (i.e., the fiber density on the second surface side at the top of the second protrusion) becomes the highest at the joint between the two, making it difficult to deform and resulting in inferior cushioning and rebound properties when pressed. Furthermore, because the shape of the joint is a point joint with a small joining area, there is a problem in that it is less likely to draw in bodily fluids such as urine and menstrual blood, i.e., its fluid transfer properties are poor. Therefore, the present invention aims to provide an absorbent article that has soft cushioning properties, good rebound when pressed, excellent ability to collect excrement, and excellent liquid transfer properties from the surface sheet to the absorbent element. The absorbent article of the present invention is a surface sheet having a concavo-convex structure used on the skin side of the absorbent article, the surface sheet having a first convex portion protruding toward the skin side and a second convex portion protruding toward the clothing side opposite to the skin side, and an absorbent element disposed at a position overlapping the surface sheet in a plan view, and the absorbent article having the surface sheet and the absorbent element joined in a planar form at the joint portion at the top of the second convex portion. According to the absorbent article of the present invention, since the joint portion between the surface sheet having a concavo-convex structure and the absorbent element is not a point joint with a small joint area as in the conventional case but is in a planar form, the joint area between the surface sheet and the absorbent element is wider than that of the conventional absorbent article, and the range in which body fluids such as urine and menstrual blood discharged onto the surface sheet can migrate to the absorbent element becomes wider. Further, when the joint portion is in a planar form, in addition to improving the liquid transferability as described above, the first convex portion protruding toward the skin side can create an uneven (three-dimensional) appearance required for the surface sheet having a concavo-convex structure, so that an absorbent article having both excellent practical functions and appearance as an absorbent article can be obtained. According to the present invention, it is possible to provide an absorbent article having soft cushioning properties, good return when pressed, excellent excrement collection properties, and excellent liquid transferability from the surface sheet to the absorbent element. Figure 1 is a perspective view of a disposable diaper, which is one embodiment of the absorbent article of the present invention. Figure 2 is a plan view of the disposable diaper of Figure 1 in an unfolded state. Figure 3 is a partial plan view of the surface sheet used in the absorbent article of the present invention. Figure 4 is a partial cross-sectional view of the Z-Z' section in Figure 3. Figure 5 is a schematic diagram of the manufacturing equipment for the uneven nonwoven fabric that constitutes the surface sheet. Figure 6 is an electron microscope image of the cross-section at the top of the first convex portion of the uneven nonwoven fabric that constitutes the surface sheet used in the absorbent article of the present invention. Figure 7 is a schematic diagram to explain the distribution of fiber density before and after joining the uneven nonwoven fabric that constitutes the surface sheet and the absorbent element. Figure 8 is an electron microscope image of the cross-section at the joint between the uneven nonwoven fabric that constitutes the surface sheet and the nonwoven fabric on the absorbent element side. Figure 9 is an electron microscope image of the cross-section at the joint of the laminated sample of Example 1. Figure 10 is an electron microscope image of the cross-section at the joint of the laminated sample of Example 2. Hereinafter, preferred embodiments of the absorbent article of the present invention will be described in detail with reference to the drawings. Figure 1 is a perspective view of a disposable diaper, which is one embodiment of the absorbent article of the present invention, and Figure 2 is a plan view of the disposable diaper of Figure 1 in an unfolded state. As shown in Figures 1 and 2, the disposable diaper 1, which is one embodiment of the present invention, has a front portion 11 that is placed against the wearer's abdomen, a middle portion 12 that is placed against the wearer's crotch, and a rear portion 13 that is placed against the wearer's buttocks and / or back. As shown in Figure 1, at the joining portions 14a and 14b, both sides 111a and 111b of the front portion 11 and both sides 131a and 131b of the rear portion 13 are joined together, so that a waist opening is formed by the end 112 of the front portion 11 and the end 132 of the rear portion 13, and a leg opening is formed by the both sides 121a and 121b of the middle portion 12, so that the disposable diaper 1 has a pant-like shape. As shown in Figures 1 and 2, the disposable diaper 1 comprises a liquid-permeable surface sheet 2, a liquid-impermeable back sheet 3, an absorbent element 4 provided between the surface sheet 2 and the back sheet 3, a liquid-impermeable cover sheet 5, liquid-impermeable leak-proof cuffs 6a and 6b, a liquid-impermeable leak-proof sheet 7, and elastic members 81, 82, 83, and 84. The cover sheet 5, provided on the skin-facing surface of the surface sheet 2, has an opening 51 formed approximately in the center. A portion of the surface sheet 2 (a portion of the area where the absorbent element 4 is located) is exposed through the opening 51 of the cover sheet 5, and together with the cover sheet 5, constitutes the skin-facing surface of the disposable diaper 1. Furthermore, one end of the leak-proof cuffs 6a and 6b, provided on both sides of the opening 51 of the cover sheet 5, is a fixed end sandwiched and fixed between the surface sheet 2 and the cover sheet 5, while the other end is a free end exposed through the opening 51 of the cover sheet 5. The free ends of the leak-proof cuffs 6a and 6b are provided with elastic portions 61a and 61b that extend in the longitudinal direction Y of the disposable diaper 1, and the leak-proof cuffs 6a and 6b are positioned to face the wearer's skin. Furthermore, as shown in Figures 1 and 2, elastic members 81, 82, 83, and 84 are provided between the back sheet 3 and the cover sheet 5, which are hourglass-shaped and of approximately the same dimensions. The elastic contraction force of the elastic members 81 and 82 forms waist gathers at the waist opening, and the elastic contraction force of the elastic members 83 and 84 forms leg gathers (leg-side cuffs) at the leg openings. These leg gathers prevent leakage of excrement from the leg openings. In this specification, the width direction X refers to the width direction (short side direction) in a plan view of the unfolded disposable diaper 1 (absorbent article), and the longitudinal direction Y refers to the longitudinal direction (front-to-back direction of the wearer) in a plan view of the unfolded disposable diaper 1 (absorbent article), and the width direction X and the longitudinal direction Y are orthogonal to each other in a plan view. The surface sheet and absorbent elements used in the absorbent article of the present invention, as well as their joining configuration, will be described in detail below. Figure 3 is a partial plan view of the surface sheet used in the absorbent article of the present invention. Furthermore, Figure 4 is a partial cross-sectional view of the Z-Z' section in Figure 3, and in particular shows the joining state of the joint between the surface sheet 2, which is made of an uneven nonwoven fabric, and the absorbent element 4. In this embodiment, the surface sheet 2 is a nonwoven fabric having an uneven structure in which a first protrusion 21 protrudes toward the skin side with respect to a central surface A parallel to the planar direction of the surface sheet 2, and a second protrusion 22 protrudes toward the clothing side opposite to the skin side with respect to the central surface A. The surface sheet 2 and the absorbent element 4 are joined in a planar manner at the joint of the top portion 22T of the second protrusion 22. In this embodiment, the first protrusion 21 of the surface sheet 2 has a substantially cylindrical shape in appearance, but the absorbent article of the present invention is not limited to this. The first or second protrusion of the surface sheet can be formed into any shape, such as a columnar shape like an elliptical column or polygonal column, a conical shape like a cone or pyramidal shape, or a truncated cone shape like a frustocone or frustoconical shape, and can even be formed into a hemispherical shape to obtain softer cushioning. Among the above shapes, particularly preferred are cylindrical, elliptical, prismatic, frustoconical, and frustoconical shapes in which the skin-facing side and the clothing-facing side are each formed flat. By making the protrusion such a shape, the protrusion can come into contact with the wearer's skin surface, making it easier to draw bodily fluids such as urine and menstrual blood adhering to the skin surface to the clothing side. Furthermore, the height of the first and second protrusions (i.e., the distance between each apex 21T, 22T and the central surface A in Figure 4) is not particularly limited, but from the viewpoint of cushioning, texture, and liquid return prevention, it is, for example, in the range of 0.1 mm to 6.0 mm, preferably in the range of 0.2 mm to 5.0 mm, and more preferably in the range of 0.2 mm to 4.0 mm. The thickness of the surface sheet is not particularly limited and any thickness can be used, but in terms of appropriate cushioning, texture, liquid return prevention, and liquid migration, it is, for example, in the range of 0.1 mm to 10.0 mm, preferably in the range of 0.5 mm to 7.0 mm, and more preferably in the range of 1.0 mm to 5.0 mm. Furthermore, the surface sheet is preferably made of a nonwoven fabric. The fibers used in this nonwoven fabric are not particularly limited, but examples include natural fibers such as wool and cotton; regenerated fibers such as rayon and acetate; polyolefins such as polyethylene (PE), polypropylene (PP), and polybutylene; ethylene-vinyl acetate copolymer (EVA); ethylene-ethyl acrylate copolymer; ethylene-acrylic acid copolymer; ionomer; polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate, and polylactic acid; synthetic fibers made using thermoplastic resins such as nylon alone; or composite fibers such as core-sheath type, side-by-side type, and sea-island type made using multiple types of the aforementioned thermoplastic resins. The core-sheath type composite fiber is preferably one in which the core is polyethylene terephthalate (PET) and the sheath is polyethylene such as high-density polyethylene (HDPE) or low-melting-point polypropylene. Typical examples of such composite fibers include core / sheath = PET / HDPE, PET / PE, PP / PE, and PP / low-melting-point PP composite fibers. Furthermore, the form of these fibers is not particularly limited, and can also be hollow fibers; fibers with irregular cross-sections such as flat, Y-shaped, or C-shaped; three-dimensional crimped fibers of latent or apparent crimp type; and split fibers that are divided by physical loads such as water flow, heat, or embossing. These fibers may be hydrophilic or hydrophobic, but if hydrophobic fibers are used, hydrophilization treatment with a hydrophilic treatment agent or the like is required separately. In addition, the above fibers may be used individually, or two or more may be used in any combination. The basis weight of the nonwoven fabric constituting the surface sheet is not particularly limited, but is preferably 10 g / m² to 100 g / m², and more preferably 15 g / m² to 50 g / m². If the basis weight is less than 10 g / m², sufficient surface strength cannot be obtained, and there is a risk of tearing during use of the absorbent article. If it exceeds 100 g / m², excessive stiffness will occur, causing discomfort or unease for the wearer during use. Furthermore, when the absorbent article is used for a long period of time, if the basis weight exceeds 50 g / m², bodily fluids such as urine and menstrual blood will be retained on the surface sheet, maintaining a sticky state and causing discomfort to the wearer. The nonwoven fabric constituting the surface sheet can be any nonwoven fabric manufactured by any manufacturing method well known in this field, such as air-through nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, thermal bond nonwoven fabric, meltblown nonwoven fabric, or needle-punched nonwoven fabric. However, as will be described later, it is particularly preferable to use a nonwoven fabric with uneven surfaces manufactured by the manufacturing method described below in order to facilitate surface bonding with the absorbent element and to adjust the distribution of fiber density within the uneven nonwoven fabric so that it changes from sparse to dense in the thickness direction, thereby creating a structure that can more easily draw in bodily fluids such as urine and menstrual blood. The method for manufacturing a textured nonwoven fabric used as a surface sheet for an absorbent article according to the present invention will be described below with reference to Figure 5. Figure 5 is a schematic diagram showing an example of a manufacturing facility 9 for producing a textured nonwoven fabric used as a surface sheet for an absorbent article according to the present invention. This manufacturing facility 9 includes a carding machine 91 that opens the fibers F1 and adjusts the basis weight, a suction drum 92 and an air jet nozzle 94 that create a textured shape on the fiber substrate F2 that exits the carding machine 91, and a heat treatment machine 95 that heat-treats the textured fiber substrate F3, which has been given a textured shape by the suction drum 92 and the air jet nozzle 94, in order to fix the textured shape. In Figure 5, the surface sheet 2, which consists of the fibers F1, fiber substrate F2, textured fiber substrate F3 and textured nonwoven fabric (described later), is conveyed in the MD direction indicated by the arrow in Figure 5, and this MD direction coincides with the longitudinal direction of the textured nonwoven fabric. In the method for manufacturing a textured nonwoven fabric using such manufacturing equipment 9, first, the opened fibers F1 are supplied to the carding machine 91. In this carding machine 91, the supplied fibers F1 are further opened, and the basis weight of the fibers F1 is adjusted to a desired value. The fibrous material F2 that exits the carding machine 91 is then conveyed toward the surface of the suction drum 92. Preferably, the suction drum is formed to be hollow or porous inside, and the inside can be made negatively pressurized by any suction means such as a blower or a vacuum pump. One or more suction holes are formed on the outer circumferential surface of the suction drum, and outside air near the outer circumferential surface can be drawn in through these suction holes. The size of the suction holes is not particularly limited, but it is preferable that they be sized so as not to draw the fibrous material F2 into the inside of the suction drum while ensuring a predetermined suction force. The outer circumferential surface of the suction drum 92 is covered at least a portion of it, preferably its entire circumference, by a pattern plate 93. The fiber substrate F2 that exits the carding machine 91 is supplied onto the pattern plate 93, which rotates together with the suction drum 92. The pattern plate 93 is made of perforated metal or the like, with a plurality of through holes arranged in a predetermined pattern, having a shape complementary to the first protrusion 21 of the surface sheet 2. In the suction drum 92, the fibrous substrate F2 supplied onto the pattern plate 93 is drawn in by the negative pressure from the suction holes formed on the outer circumferential surface of the suction drum 92 and attracted onto the pattern plate 93 and into the through holes. In this embodiment, the vertical distance (i.e., the thickness direction) between the top 21T of the first protrusion 21 and the top 22T of the second protrusion 22 is approximately equal to the thickness of the pattern plate 93. The suction drum 92 is configured to suction in region AS between point SS on the outer circumferential surface where the fibrous substrate F2 is supplied from the upstream belt conveyor UB, and point SE on the outer circumferential surface where the uneven fibrous substrate F3 is supplied to the downstream belt conveyor DB. It is preferable that region AN other than the region AS that is suctioned is not configured to suction, from the viewpoint of improving the suction efficiency of the suction drum 92 and preventing contamination of foreign matter. The fibrous substrate F2, which is adsorbed onto the pattern plate 93 on the outer circumferential surface of the suction drum 92, is subjected to a gas injection means such as an air jet nozzle 94 that blows hot air or the like onto it. Here, the air jet nozzle 94 is configured to blow out hot air at a predetermined temperature and velocity from one or a plurality of outlets arranged in the width direction of the fibrous substrate F2. By appropriately adjusting the spacing between each outlet, the distance between the outlet and the fibrous substrate F2, the shape and size of the outlets, etc., the hot air can be blown substantially uniformly over the entire width of the fibrous substrate F2, or locally onto a part of the fibrous substrate F2 in the width direction. The suction action of the suction drum 92 and the blowing action of the air jet nozzle 94 can create a shape on the fibrous substrate F2 that corresponds to the uneven shape of the surface sheet 2. The temperature of the warm air blown out from the air jet nozzle is not particularly limited, but from the viewpoint of shapeability, it is preferable to set it to a temperature higher than the melting point of the material constituting the fibrous base material F2, for example, 20°C to 70°C higher than the melting point. If the temperature of the warm air is too high, the nonwoven fabric after shaping will become excessively hard, so it is preferable to adjust the temperature so that it does not become too high. The wind speed of the warm air is not particularly limited, as long as it is a wind speed that can shape the fibrous base material F2 into the desired uneven shape, but for example, when the fibrous base material F2 has the basis weight and thickness of a nonwoven fabric for absorbent articles as in the embodiment of the present invention described later, the wind speed is in the range of 10.0 m / sec to 150.0 m / sec, and preferably 15.0 m / sec to 100.0 m / sec. Since the temperature and velocity of the hot air depend on the material and basis weight of the fibers used, the shape of the uneven surface to be formed, the transport speed, the number and position of the air jet nozzles, etc., it is preferable to determine the optimal temperature and velocity through experiments or other means. As described above, by blowing hot air at a temperature higher than the melting point of the material constituting the fiber substrate F2 onto the fiber substrate F2 at a predetermined velocity, the desired uneven surface shape can be formed onto the fiber substrate F2 with high precision. In this embodiment, the surface of the fibrous substrate F2 that contacts the pattern plate 93 on the outer surface of the suction drum 92 is designated as the surface of the absorbent article that faces the skin. However, the present invention is not limited to this form, and the surface to which the hot air is blown may be designated as the surface of the absorbent article that faces the skin. Furthermore, in the fibrous base material F2, the portion of the surface sheet 2 corresponding to the top 21T of the first protrusion 21 is attracted to the suction drum 92 side by the suction action of the suction drum 92 and the spraying action of the air jet nozzle 94, causing the fibers constituting the fibrous base material F2 to be unevenly distributed in the thickness direction of the fibrous base material F2. Due to this uneven distribution of fibers, in the uneven nonwoven fabric, the fiber density on the suction drum 92 side, i.e., the skin-facing side of the absorbent article, is higher than the fiber density on the air jet nozzle 94 side, i.e., the clothing-facing side of the absorbent article, at the top 21T of the first protrusion 21. Furthermore, in the portion of the fibrous base material F2 corresponding to the top 22T of the second protrusion 22, the fibers constituting the fibrous base material F2 are attracted to the suction drum 92 side by the suction action of the suction drum 92 and the spraying action of the air jet nozzle 94, causing the fibers to be unevenly distributed in the thickness direction of the fibrous base material F2. As a result, in the uneven nonwoven fabric, at the top 22T of the second protrusion 22, the fiber density on the suction drum 92 side, i.e., the skin-facing side of the absorbent article, is higher than the fiber density on the air jet nozzle 94 side, i.e., the clothing-facing side of the absorbent article. Here, "fiber density" in this specification refers to the number of fiber cross-sections per unit area when the cross-section of a nonwoven fabric is observed under magnification. Specifically, it refers to the number of fiber cross-sections per unit area (approximately 2 mm²) when the cross-section of the nonwoven fabric is observed under magnification using a scanning electron microscope (for example, KEYENCE's "Real Surface View Microscope VE-7800") with the midpoint in the thickness direction of the nonwoven fabric as the observation center (i.e., at a magnification such that approximately 20 to 70 fiber cross-sections can be observed, usually at a magnification of 20 to 100 times), and this number of cross-sections is converted to the number of fiber cross-sections per 1 mm². In the examples described later, the fiber density is measured at three locations, and the average value is used as the fiber density of the sample. Furthermore, in this specification, "fiber density on the skin side" refers to the fiber density of the skin-side portion when the thickness of the nonwoven fabric is divided into two equal parts, and "fiber density on the clothing side" refers to the fiber density of the remaining clothing-side portion. Figure 6 is an electron microscope image of a cross-section of the top 21T of the first protrusion 21 of the uneven nonwoven fabric. As can be seen from this image, as described above, the fiber density on the skin side SD at the top of the protrusion is higher than the fiber density on the clothing side GD. When the fiber density on the skin side is higher than the fiber density on the clothing side at the top 21T of the first protrusion 21, bodily fluids such as urine and menstrual blood supplied to the skin side surface of the uneven nonwoven fabric are less likely to remain at the top 21T of the first protrusion 21 and are more likely to flow into the top 22T of the second protrusion 22. As a result, the bodily fluids can be effectively permeated into the joint with a large bonding area at the top 22T of the second protrusion 22, and the re-adhesion of the bodily fluids to the wearer's skin can be significantly reduced. Furthermore, Figure 7 schematically shows the fiber density state of the uneven nonwoven fabric before and after joining, and Figure 8 is an electron microscope image of the cross-section of the top 22T of the second protrusion 22 after joining. As shown in Figure 7, if the fiber density on the skin side of the top 22T of the second protrusion 22 of the uneven nonwoven fabric is higher than the fiber density on the clothing side (see the high fiber density portion HD on the skin side in Figure 7), that is, if the fiber density on the clothing side is lower than the fiber density on the skin side (see the low fiber density portion LD on the clothing side in Figure 7), then when the uneven nonwoven fabric and the absorbent element 4 are joined, the low-density portion LD on the clothing side of the top 22T of the second protrusion 22 is crushed and compressed during joining, resulting in a higher fiber density at the top 22T of the second protrusion 22 after joining. Specifically, the fiber density at the top 22T of the second protrusion 22 becomes higher than the fiber density around the top 22T (see the further high-density portion MHD in Figure 7), making it easier to draw in bodily fluids such as urine and menstrual blood from around the top 22T of the second protrusion 22 to the joining portion of the top 22T. In Figure 7, the relationship of fiber density in each part is LD < HD < MHD. Furthermore, the shape of each protrusion in the uneven nonwoven fabric depends on the shape of the through-holes in the pattern plate, the suction force of the suction drum, the temperature and wind speed of the hot air blown from the air jet, the basis weight of the fiber base material F2, and the material of the fibers constituting the fiber base material F2. Therefore, the shape of the protrusions can be arbitrarily adjusted by appropriately setting these factors. Furthermore, as shown in Figure 5, the uneven fibrous substrate F3, which has been given an uneven shape by the suction drum 92 and the air jet nozzle 94, is then transported to a heat treatment machine 95 by a conveying device such as a belt conveyor DB, and heat-treated in the heat treatment machine 95. This heat treatment fixes the uneven shape formed on the uneven fibrous substrate F3 and imparts flexibility to the uneven nonwoven fabric. Once the heat treatment of the uneven fiber base material F3 is complete, an uneven nonwoven fabric to be used as the surface sheet 2 of the absorbent article according to the present invention is completed. The completed uneven nonwoven fabric may be cut to a desired size depending on the form in which it will be used. Next, the absorbent elements used in the absorbent articles of the present invention will be described. The absorbent elements used in the absorbent articles of the present invention are not particularly limited as long as they have the function of absorbing and retaining bodily fluids such as urine and menstrual blood, and any conventionally used absorbent elements can be used. However, from the viewpoint of comfort when worn, it is preferable that they are bulky, resistant to deformation, and have little chemical irritation. Examples of such absorbent elements include an absorbent core containing a fibrous material such as fluff pulp, spunbond nonwoven fabric, airlaid nonwoven fabric, or thermoplastic fiber, and a polymeric absorbent such as a super absorbent polymer (SAP), which is at least partially covered with an absorbent core covering sheet made of a liquid permeable sheet such as a tissue sheet, liquid permeable nonwoven fabric, or hydrophilic nonwoven fabric. Note that the absorbent core does not necessarily have to contain a super absorbent polymer, and for example, a material consisting only of the above-mentioned fibrous material covered with tissue can be used as the absorbent core. Furthermore, instead of the aforementioned fluff-like pulp, etc., the fibrous material of the absorbent core can also be, for example, chemical pulp, cellulose fibers, artificial cellulose fibers such as rayon and acetate; fibrous network absorbents using synthetic fibers (including composite fibers) such as polyolefins, polyesters, and polyamides; or foam absorbents using foam materials such as polyurethane. The basis weight of the fiber material is not particularly limited, but from the viewpoint of absorbency of bodily fluids such as urine and menstrual blood, it is, for example, 50 g / m² to 1000 g / m², preferably 100 g / m² to 800 g / m², and more preferably 150 g / m² to 700 g / m². The superabsorbent polymer used in the absorbent core has a three-dimensional network structure in which water-soluble polymers are appropriately crosslinked, and is essentially water-insoluble. Furthermore, it is preferable that the superabsorbent polymer can absorb 20 times or more its own weight in water, preferably 30 to 60 times, and more preferably several hundred to a thousand times, and that it does not allow absorbed water to seep out even when some stress is applied. Examples of such superabsorbent polymers include starch-based polymers, crosslinked carboxymethylated cellulose, acrylic acid-based polymers such as polymers or copolymers of acrylic acid or alkali metal acrylate salts, and amino acid-based polymers. The form of the superabsorbent polymer is not particularly limited, but examples include particulate, powder, lump, secondary aggregate of particles, and fibrous form. Preferably, it is in the form of particulate, powder, or fibrous form, and more preferably, it is in the form of parts with a particle size of 1 to 1000 μm, and more preferably, particulate with a particle size of 10 to 500 μm. The basis weight of the superabsorbent polymer is not particularly limited, but from the viewpoint of absorption of bodily fluids such as urine and menstrual blood, it is, for example, 50 g / m² to 1000 g / m², preferably 80 g / m² to 800 g / m², and more preferably 100 g / m² to 700 g / m². Furthermore, from the viewpoint of absorption of bodily fluids such as urine and menstrual blood, the mass ratio of the superabsorbent polymer is, for example, 10% to 100%, preferably 20% to 80%, and more preferably 30% to 65%, with the fiber material being 100%. The absorbent core covering sheet, which covers the absorbent core at least partially, is made of a liquid-permeable sheet such as an air-through nonwoven fabric, a spunbond nonwoven fabric, a point-bond nonwoven fabric, a hydrophilic-treated perforated plastic film, or a liquid-permeable plastic film. In particular, when this liquid-permeable sheet is provided between the surface sheet and the absorbent core, it is preferable that the liquid-permeable sheet has a higher fiber density than the surface sheet. Providing such a liquid-permeable sheet between the surface sheet and the absorbent core improves liquid drainage and reduces liquid backflow. Furthermore, if the fiber density of the liquid-permeable sheet is higher than the fiber density at the top of the second protrusion of the surface sheet (i.e., the fiber density at the top of the second protrusion is lower than the fiber density of the liquid-permeable sheet), bodily fluids such as urine and menstrual blood discharged onto the surface sheet can easily transfer to the absorbent core. The fineness of the fibers constituting the liquid-permeable sheet is preferably 0.01 to 20 dtex, and more preferably 1 to 10 dtex. If this fineness is too high, the number of fibers decreases, making it difficult to hold the polymer absorbent between the fibers and inhibiting the swelling of the polymer absorbent (i.e., the amount of absorption decreases). Conversely, if this fineness is too low, the rigidity of the fibers themselves decreases, making it difficult to maintain the basic structure of the liquid-permeable sheet made of the fibers. Furthermore, the fiber length of the fibers constituting the liquid-permeable sheet is preferably 30 mm to 80 mm, and more preferably 40 mm to 70 mm. If this fiber length is too long, the fibers become difficult to handle, and conversely, if this fiber length is too short, the number of heat-sealable points decreases, making it difficult to maintain the basic structure of the liquid-permeable sheet made of the fibers. The basis weight of the liquid-permeable sheet is not particularly limited, but from the viewpoint of liquid drainage, strength, and liquid return, it is, for example, 5 g / m² to 50 g / m², preferably 5 g / m² to 30 g / m², and more preferably 8 g / m² to 25 g / m². The liquid-permeable sheet may cover the absorbent core with a single sheet, but it is preferable to cover the absorbent core by sandwiching it between two sheets. However, if the absorbent core does not lose its shape, it is not necessary to cover it with the liquid-permeable sheet. Furthermore, the absorbent core covering sheet may be composed of two or more liquid-permeable sheets in at least the region located between the surface sheet and the absorbent core. In this case, it is preferable that the two or more liquid-permeable sheets are arranged such that the fiber density decreases sequentially from the liquid-permeable sheet on the skin side to the liquid-permeable sheet on the clothing side. When the two or more liquid-permeable sheets are arranged in this manner, liquid backflow from the absorbent core can be prevented more effectively than with an absorbent core covering sheet consisting of a single liquid-permeable sheet. The shape, structure, size, etc., of the absorbent elements may be changed as appropriate, as long as they satisfy the required absorption capacity and comfort when worn as an absorbent article. Next, a method for joining the surface sheet and the absorbent element will be described. The method for joining the surface sheet and the absorbent element is not particularly limited as long as it allows for surface joining so that the shape of the joint becomes planar. Any joining method can be adopted, such as heat fusion by conventionally used methods such as thermal embossing, ultrasonic embossing, or high-frequency embossing; bonding with adhesives such as hot melt adhesives; or mechanical joining using engagement, etc. However, from the viewpoint of liquid migration, joint strength, texture, manufacturing equipment, and ease of handling, heat fusion by thermal embossing or bonding with adhesives such as hot melt adhesives is preferred. By using such joining means, a structure of the joint with excellent liquid migration properties can be realized more reliably and easily. In addition, by adopting conventionally used joining means such as embossing or adhesives, it is possible to avoid increasing the complexity of manufacturing equipment or constructing new manufacturing equipment. Furthermore, when joining by thermal embossing, a thermal embossing apparatus is used that includes an embossing roll with a predetermined pattern of uneven surfaces formed on its circumferential surface and an anvil roll with a smooth circumferential surface. The surface sheet and the absorbent element are introduced between the two rolls in an overlapping state, and the two rolls press together to partially join the surface sheet and the absorbent element. Each of the aforementioned rolls can be adjusted to a predetermined temperature, and the spacing between each roll can also be adjusted as appropriate. The heating temperature of the embossing roll is not particularly limited, but it is preferable that the material facing at least one of the bonding surfaces of the surface sheet and the absorbent element melts at least partially. Such a heating temperature is, for example, in the range of 50°C to 300°C, preferably 60°C to 200°C, more preferably 70°C to 150°C, and particularly preferably 80°C to 130°C, from the viewpoint of liquid migration, bonding strength, and texture at the bonded portion after bonding. The linear pressure between the two rolls is not particularly limited, but it is preferable to set it to a pressure that allows the low fiber density portion LD at the top of the second protrusion of the uneven nonwoven fabric constituting the surface sheet to be crushed and surface-joined, as described above. Such a linear pressure is, for example, in the range of 1 N / cm to 1000 N / cm, preferably 10 N / cm to 800 N / cm, more preferably 30 N / cm to 600 N / cm, and particularly preferably 50 N / cm to 400 N / cm, from the viewpoint of liquid transfer properties, bonding strength, and texture at the joint. The shape of the joint in plan view (or the shape of the corresponding protrusion of the embossing roll) is not particularly limited, but various shapes such as circular, elliptical, rectangular, rectangular, rhombus, and polygonal shapes can be seen in plan view. The arrangement pattern of the joints is also not particularly limited, but from the standpoint of bulkiness, texture, strength, and liquid transfer properties of the joints after joining, they are arranged in a staggered pattern, for example, with a pitch of 1 mm to 30 mm, preferably 3 mm to 10 mm, and more preferably 4 mm to 7 mm. When bonding with the aforementioned adhesive, the adhesive, such as a hot melt adhesive, is applied in a predetermined pattern to the clothing-side of the surface sheet and / or the skin-side of the absorbent element using any means such as coating. The surface sheet and the absorbent element are then superimposed under or without pressure to partially bond them together. The adhesive is not particularly limited, and any conventionally used adhesive can be used, but hot melt adhesives are preferred in terms of liquid migration, bonding strength, texture, productivity, and availability. Such hot melt adhesives are not particularly limited, but examples include olefin-based adhesives such as polyethylene, polypropylene, and ethylene-α-olefin copolymers; ethylene-vinyl acetate copolymers; polyamide-based adhesives; thermoplastic elastomer-based adhesives such as styrene-butylene-styrene copolymers and styrene-isoprene-styrene copolymers; and reactive hot melt adhesives such as moisture-curing urethane prepolymers. The predetermined pattern to which the adhesive is applied is not particularly limited, but examples include σ coating, spiral coating, and coater coating. It can also be a dot pattern of various shapes such as circles, ellipses, rectangles, rhombuses, and polygons in plan view. Furthermore, the pattern is applied in a grid arrangement with a pitch of, for example, 1 mm to 30 mm, preferably 3 mm to 10 mm, and even more preferably 4 mm to 7 mm, from the viewpoint of bulkiness, texture, strength, and liquid migration at the joint after joining. Regarding the joining of the surface sheet and the absorbent element, it can be carried out by any joining method, not limited to the method described above. However, in the present invention, it is essential that the joining portion at the top of the second protrusion of the surface sheet is joined in a planar form, that is, "surface joining". Herein, the term "surface bonding" in this specification refers to a bonding configuration in which at least a portion of the top of the second protrusion in the surface sheet, particularly the apex, is embedded between the fibers constituting the absorbing element, particularly the absorbing core covering sheet, and the bonding area ratio described later is 4.0% or more. In this specification, the term "bonding area ratio" refers to the area ratio of the bonded portion per unit area of ​​the overlapping region where the surface sheet and the absorbent element overlap in a plan view. Such a bonding area ratio can be measured by a measurement method using a scanning electron microscope, which will be described later. By setting this bonding area ratio to 4.0% or more, preferably 5.0% or more, and particularly preferably 5.2% or more, liquid transfer properties and the like can be further improved. Furthermore, the bonding area ratio is preferably 60% or less, more preferably 40% or less, and particularly preferably 20% or less, from the viewpoint of bulkiness and texture. In the absorbent article of the present invention, as described above, it is preferable to use an uneven nonwoven fabric as the surface sheet in which the fiber density on the skin side at the top of the first or second protrusion is higher than the fiber density on the clothing side. When such an uneven nonwoven fabric is used, as shown in Figures 7 and 8, at the top 22T of the second protrusion 22 of the surface sheet 2, the fiber density on the clothing side is lower than the fiber density on the skin side. Therefore, when the surface sheet 2 and the absorbent element 4 are joined, the low fiber density portion LD at the top 22T is crushed and compressed during joining. As a result, the fiber density at the top 22T of the second protrusion 22 after joining becomes higher than the fiber density around the top 22T (see the further high fiber density portion MHD portion in Figures 7 and 8). This makes it easier to draw in bodily fluids such as urine and menstrual blood from the area around the top 22T of the second protrusion 22 to the joining portion of the top 22T. Furthermore, in another embodiment of the present invention, when the overlapping region where the surface sheet and the absorbent element overlap in a plan view is divided into three equal parts in the width direction of the absorbent article, it is preferable that the surface sheet and the absorbent element are joined such that the joining area ratio of the joining portions in the left and right regions in the width direction is higher than the joining area ratio of the joining portion in the central region. By making the joining area ratio of the left and right regions in the width direction higher than that of the central region, it is possible to more effectively prevent bodily fluids such as urine and menstrual blood from flowing out from the edges of the absorbent element in the width direction, and the amount of bodily fluid entering the central region is lower than that of the left and right regions, so that the bodily fluid can be absorbed over a wider area, and the utilization efficiency of the absorbent element can be greatly improved. Furthermore, in another embodiment of the present invention, it is preferable that the surface sheet is bonded to the absorbent element in such a way that it does not cover the side edges on both sides of the absorbent article in the absorbent element that extend in the longitudinal direction (i.e., in the front-to-back direction of the wearer). When the surface sheet is bonded in this way, it is possible to ensure excellent liquid transfer properties with the surface sheet while preventing discomfort to the wearer in areas that rub against the wearer's legs, such as the thighs. The present invention can be applied to various absorbent articles, such as incontinence pads, sanitary napkins, and panty liners, in addition to the disposable diapers of the embodiments described above. However, the absorbent articles of the present invention have soft cushioning properties, good rebound when pressed, and excellent excretory material collection properties, as well as excellent liquid transfer properties from the surface sheet to the absorbent element. Therefore, they are particularly suitable for use in absorbent articles that absorb large amounts of liquid, such as disposable diapers, incontinence pads, and sanitary napkins. The absorbent articles of the present invention are not limited to the embodiments described above or the following examples, and can be modified as appropriate without departing from the purpose and spirit of the present invention. The present invention will be described in more detail below based on examples, but the present invention is not to be limited thereto. To investigate the influence of the bonding state between the uneven nonwoven fabric constituting the surface sheet and the nonwoven fabric constituting the liquid-permeable sheet in the absorption element (hereinafter referred to as "nonwoven fabric on the absorption element side") on the absorption behavior of an absorbent article, a laminated sample was prepared by bonding the uneven nonwoven fabric and the nonwoven fabric on the absorption element side as described below. 1) Preparation of textured nonwoven fabric In preparing the textured nonwoven fabric, first, a composite fiber (fiber F1) having a fineness of 1.3 dtex and a core / sheath structure of PET / HDPE was opened using a fiber opening machine, and then the fiber was formed using a carding machine set to a predetermined basis weight. The formed card web (fiber base material F2) was transported by a mesh conveyor and supplied onto a pattern plate attached to the outer surface of a suction drum, which rotates with the suction drum. While the suction drum rotates, the card web is sucked in by negative pressure from suction holes formed on the outer surface of the suction drum, and 140°C hot air at a wind speed of 33.3 m / sec is blown onto the card web from an air jet nozzle positioned at a predetermined location below the suction drum, thereby forming a predetermined pattern of textured surface on the card web by making the card web conform to the pattern plate. Furthermore, the web with the aforementioned uneven shape (uneven fiber base material F3) was transported to a heat treatment machine and heat-treated under hot air conditions at a temperature of 133°C and an airflow speed of 0.9 m / sec. After that, it was wound up to obtain an uneven nonwoven fabric. The basis weight of the obtained uneven nonwoven fabric was 30 g / m2. 2) Preparation of laminate samples by joining the textured nonwoven fabric and the nonwoven fabric on the absorbent element side. As the nonwoven fabric on the absorbent element side, a nonwoven fabric with a basis weight of 20 g / m2 was used, which was made using composite fibers having a fineness of 2.2 dtex and a core / sheath structure of PET / HDPE. The textured nonwoven fabric prepared above and the nonwoven fabric on the absorbent element side were joined by thermal embossing or hot melt adhesive (HMA) under the conditions of each example or comparative example described later, to prepare laminate samples for Examples 1 and 2 and Comparative Examples 1 to 6. For each laminated sample obtained as described above, the bonding state was confirmed using a scanning electron microscope, and the bonding area (a1), bonding area ratio (a2), penetration rate, and brush rate were measured to compare the absorption behavior of each laminated sample. The scanning electron microscope imaging conditions for the bonding area, the measurement conditions for the bonding area (a1) and bonding area ratio (a2), etc. are as follows. 3) Measurement of the bonding area (a1) The bonding area (a1) was determined by observing the cross-section of the bonding area between the uneven nonwoven fabric and the nonwoven fabric on the absorption element side using a scanning electron microscope at a magnification (20x to 100x) sufficient to observe the entire bonding area, and then photographing the image based on the scale of the photograph. 4) Measurement of bonding area ratio (a2) When the bonding means is embossing, the bonding area ratio (a2) is calculated by using the bonding range (a1) measured as described above as the diameter, since the tips of each protrusion of the embossing are slightly rounded, and then applying this to a predetermined embossing pattern to calculate the bonding area ratio (a2). Note that this bonding area ratio (a2) does not have to be determined by the embossing pattern, and the shape of the protrusions may be circular, elliptical, rectangular, etc. Also, when the bonding means is HMA, the tips of the protrusions of the uneven nonwoven fabric are slightly rounded, so the bonding range (a1) measured as described above as the diameter, and then applying this to a predetermined uneven pattern to calculate the bonding area (a2). 5) Measurement of penetration rate and brushing rate To measure the penetration rate and brushing rate, first, the surface material was removed from a commercially available baby disposable diaper, Moony "AirFit" size S, manufactured by Unicharm Corporation. The laminated sample prepared as described above was then attached to the area where the surface material had been removed to create a sample for the absorbency evaluation test. The following absorbency evaluation test was performed using this sample. In the absorbency evaluation test, 40 ml of simulated urine was dropped once, and the time it took for all of this simulated urine to transfer into the uneven nonwoven fabric was measured. This measured time was defined as the penetration rate. Similarly, the time it took for all of the simulated urine to pass through the uneven nonwoven fabric and transfer to the nonwoven fabric on the absorbent element side was measured. This measured time was defined as the brushing rate. The simulated urine was prepared by dissolving 200 g of urea, 80 g of sodium chloride, 8 g of magnesium sulfate, 3 g of calcium chloride, and approximately 1 g of dye (Blue No. 1) in 10 L of deionized water. 6) Measurement of Fiber Density The fiber density was measured in the same manner as described in Japanese Patent Publication No. 2012-144835 (see paragraph

[0041] ). Specifically, a scanning electron microscope (for example, KEYENCE's "Real Surface View Microscope VE-7800") was used to magnify and observe the cross-section of the nonwoven fabric with the midpoint in the thickness direction of the nonwoven fabric as the observation center (i.e., at a magnification such that approximately 20 to 70 fiber cross-sections can be observed, usually at a magnification of 20 to 100 times). The number of fiber cross-sections per a certain area (approximately 2 mm²) was counted, and this number of cross-sections was converted to the number of fiber cross-sections per 1 mm², which was defined as the fiber density. This fiber density measurement was performed at three locations, and the average value was taken as the fiber density of the sample. Example 1 The uneven nonwoven fabric prepared as described above and the nonwoven fabric on the absorbent element side, which was spirally coated with HMA, were overlapped and bonded together to form a single unit. The bonding state of the obtained laminated sample was confirmed using a scanning electron microscope, and the bonding range (a1), bonding area ratio (a2), penetration rate, and brushing rate were measured. An electron microscope image of the laminated sample from Example 1 is shown in Figure 9, and the measurement results for the bonding range (a1), etc., are shown in Table 1. Example 2 A laminated sample was prepared in the same manner as in Example 1, except that instead of the HMA bonding method, an embossing method was adopted using an embossing roll heated to 110°C, which had multiple pins arranged in a staggered pattern with a pitch of 6.9 mm in the MD direction and a pitch of 4 mm in the CD direction. The bonding state of the obtained laminated sample was confirmed by scanning electron microscopy, and the bonding range (a1), bonding area ratio (a2), penetration rate, and brushing rate were measured. Figure 10 shows an electron microscope image of the laminated sample of Example 2, and Table 1 shows the measurement results for the bonding range (a1), etc. Comparative Example 1 A laminate sample of Comparative Example 1 was prepared in the same manner as in Example 1, except that a flat nonwoven fabric without an uneven surface was used instead of an uneven nonwoven fabric. To prepare the flat nonwoven fabric, first, synthetic fibers having a fineness of 1.3 dtex and a core / sheath structure of PET / HDPE were opened using a fiber opening machine, and then formed using a carding machine set to a predetermined basis weight. Furthermore, the formed card web was transported by a mesh conveyor to a heat treatment machine set to a predetermined temperature, and after heat treatment under hot air conditions at a temperature of 133°C and an airflow speed of 0.9 m / sec, it was wound up to produce the flat nonwoven fabric. The basis weight of the obtained flat nonwoven fabric was 30 g / m2. The flat nonwoven fabric prepared in this manner and the nonwoven fabric on the absorbent element side were bonded together using the HMA method, as in Example 1. In Comparative Example 1, since flat nonwoven fabrics were joined together, the bonding area ratio of the laminated sample was 100%, so only the penetration rate and brushing rate were measured for this laminated sample. The measurement results of the penetration rate, etc., of the laminated sample of Comparative Example 1 are shown in Table 1. Comparative Examples 2-6 Laminate samples of Comparative Examples 2-6 were prepared in the same manner as in Example 1 or 2, except that the bonding state was point bonding (i.e., the bonding area was less than 4.0%), with different bonding areas. The bonding state of each obtained laminate sample was confirmed by scanning electron microscopy, and the bonding range (a1), bonding area ratio (a2), penetration rate, and brushing rate were measured. The measurement results of the bonding range (a1), etc., for the laminate samples of Comparative Examples 2-6 are shown in Table 1. As shown in Table 1, the laminate samples of Examples 1 and 2, which were joined by surface bonding, showed significantly improved penetration and brushing speeds compared to the laminate samples of Comparative Examples 2 to 6, which were joined by point bonding. Furthermore, surprisingly, the laminate samples of Examples 1 and 2 showed improved penetration and brushing speeds compared to the laminate sample of Comparative Example 1, which had a bonding area ratio of 100% (i.e., full bonding). This supports the idea that the fiber density at the top of the second protrusion in the bonded uneven nonwoven fabric is higher than the fiber density around the top, making it easier for liquid to be drawn in from the area around the top to the bond at the top. In addition, from the measurement results of the penetration and brushing speeds of the laminate samples of Examples 1 and 2, it was found that laminates joined by the embossing method, such as the laminate sample of Example 2, exhibit excellent absorption characteristics even with a relatively low bonding area ratio because the pins of the embossing roll compress the fibers by pushing them from the surface sheet towards the nonwoven fabric on the absorbent element side. 1 Disposable diaper 2 Surface sheet 21 First protrusion 21T Top of the first protrusion 22 Second protrusion 22T Top of the second protrusion 3 Back sheet 4 Absorbent element 9 Manufacturing equipment 91 Carding machine 92 Suction drum 93 Pattern plate 94 Air jet nozzle 95 Heat treatment machine F1 Fiber F2 Fiber base material F3 Textured fiber base material

Claims

Revised May 11, 2021. No claims. -------------------------------------------------------------------------- Revised October 27, 2016.

1. Absorbent products with a front sheet having a protrusion-crest structure to be applied to the skin side of the absorbent product. The front sheet has one protrusion extending to the skin side and a second protrusion extending to the garment on the opposite side from the skin side, and an absorbent component located at a position overlapping the front sheet as viewed from above, where the front sheet and the absorbent component are connected planarly at the connection point of the upper part of the second protrusion.

2. Absorbent products under claim 1 where the planar connection point is formed by a planar seam using embossing or adhesive.

3. Absorbent products under claim 2 where the adhesive is a hot melt adhesive.

4. Absorbent products under claims 1 through 3 where the front sheet is a non-woven fabric and the fiber density of the upper part of the second protrusion at the connection point is higher than the fiber density surrounding the upper part. 5.One of the absorbent products under claims 1 through 4 in which the overlapping area of ​​the front sheet and the inflamed component overlap in a planar manner is divided into 3 equal sections in the width direction of the absorbent product; the percentage of the connecting area of ​​the connecting sections in the left and right directions in the width direction is higher than the percentage of the connecting area of ​​the connecting section in the center direction.

6. One of the absorbent products under claims 1 through 5 in which the first and second protrusions have at least one shape selected from a group consisting of cylinder, elliptical, polygonal, conical, pyramidal, truncated cone, and truncated pyramidal shapes. 7.The absorbent product under any one of the claims 1 through 6, in which the front sheet is a non-woven fabric, the absorbent component consists of an absorbent core and an absorbent core covering sheet consisting of a sheet through which at least some fluid is permeable, partially covering the absorbent core from the skin side and connected to the upper part of the second protrusion of the front sheet, and the fiber density of the sheet through which fluid is permeable is higher than the fiber density at the upper part of the second protrusion. 8.Any absorbent product under claims 1–7 in which the absorbent component consists of an absorbent core and an absorbent core cover consisting of at least two fluid-permeable sheets that cover the absorbent core and are connected to the upper end of the second protrusion of the front sheet. The absorbent core cover consists of at least two fluid-permeable sheets in the area between the front sheet and the absorbent core. These two or more fluid-permeable sheets are arranged so that the fiber density gradually decreases from the fluid-permeable sheet on the skin side towards the fluid-permeable sheet on the garment side.

9. Any absorbent product under claims 1–8 in which the front sheet is connected to the absorbent component so as not to cover the upper edge of the second protrusion of the absorbent component in the length direction of the absorbent product.Absorbent products with an out-and-out structured front sheet to be applied to the skin side of the absorbent product; the front sheet has one projection extending towards the skin side and a second projection extending towards the opposite side of the garment from the skin side; and the absorbent component is positioned to overlap the front sheet in a top-down view, where the front sheet and the absorbent component are connected in a planar manner at the connection point of the upper part of the second projection.

2. Absorbent products under claim 1 where the planar connection point is formed by a planar seam using embossing or adhesive.

3. Absorbent products under claim 2 where the adhesive is a hot-melt adhesive.

4. Absorbent products under claims 1 through 3 where the front sheet is a non-woven fabric and the fiber density of the upper part of the second projection at the connection point is higher than the fiber density surrounding the upper part. 5.One of the absorbent products under claims 1 through 4, where the overlapping area of ​​the front sheet and the complex absorbent component overlap in a planar manner, is divided into 3 equal sections in the width direction of the absorbent product; the percentage of the connecting area of ​​the connecting sections in the left and right areas in the width direction is higher than the percentage of the connecting area of ​​the connecting section in the center direction.

6. One of the absorbent products under claims 1 through 5, where the first and second protrusions have at least one shape selected from a group consisting of cylinder, elliptical, multilateral column, cone, pyramid, truncated cone, and truncated pyramid. 7.An absorbent product pursuant to any one of the claims 1 through 6, in which the front sheet is a non-woven fabric, the absorbent component consists of an absorbent core and an absorbent core covering sheet consisting of a sheet through which at least some fluid is permeable, partially covering the absorbent core from the face side and connected to the upper part of the second protrusion of the front sheet, and the fiber density of the sheet through which fluid is permeable is higher than the fiber density at the upper part of the second protrusion.Any absorbent product under claims 1–7 in which the absorbent component consists of an absorbent core and an absorbent core cover plate consisting of at least two fluid-permeable plates that cover the absorbent core and are connected to the upper part of the second protrusion of the front plate. The absorbent core cover plate consists of at least two fluid-permeable plates in the area between the front plate and the absorbent core. Such two or more fluid-permeable plates are arranged so that the fiber density gradually decreases in sequence from the fluid-permeable plate on the skin side to the fluid-permeable plate on the garment side.

9. Any absorbent product under claims 1–8 in which the front plate is connected to the absorbent component so as not to cover the upper edges on both sides of the absorbent component protruding in the length direction of the absorbent product;