absorbent articles

Abstract

To provide an absorbent article capable of reliably absorbing absorption objects, such as liquid excrement like urine, with a simple structure.SOLUTION: The absorbent article includes: a multilayered surface side sheet material comprising a top sheet 42 that comes into contact with the skin of the wearer and an intermediate sheet 45 provided on the back side of the top sheet 42, the intermediate sheet 45 being fixed the top sheet 42; a top layer absorber 44 provided between the top sheet 42 and the intermediate sheet 45 of the surface side sheet material; a back sheet 48 provided on the surface side sheet material on the side opposite to the wearer's skin; and a bottom layer absorber 46 provided between the surface side sheet material and the back sheet 48, and the bottom layer absorber being 46 fixed to a carrier sheet 47.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] Conventionally, absorbent articles worn in combination with diapers have been used to capture waste (e.g., urine, feces, etc.) excreted by wearers (e.g., infants, disabled people, elderly people, etc.). These absorbent articles have a structure in which, for example, an absorbent part made of pulp or a highly absorbent polymer is sandwiched between nonwoven fabrics or the like (referred to as sheets) and joined with an adhesive or the like.

[0003] These absorbent parts are generally single-layer or two-layer, and conventionally, once urine has been absorbed, the bond between the absorbent part and the sheet will come apart, leaving only the sheet to adhere to and follow the wearer's skin. This has posed a problem, making urine leakage more likely if the wearer urinates again.

[0004] Therefore, the technology disclosed in Patent Document 1 has been proposed as a technology for preventing urine leakage when urine is excreted again. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-347065 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technology of Patent Document 1 has a special structure in which two absorbent layers are separated and the upper absorbent layer fits the crotch area, which can make the structure complicated.

[0007] The present invention has been made in consideration of the above, and aims to provide an absorbent article that can reliably absorb liquid excrement such as urine with a simple structure. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems and achieve the object, the absorbent article according to claim 1 comprises a surface layer that contacts the skin of a wearer; a cover sheet provided on the back side of the surface layer; a multi-structured surface side sheet material having a back surface layer provided on the back side of the surface side sheet material; cover sheet and the back surface layer; a back surface sheet provided on the side of the surface side sheet material opposite to the wearer's skin; a second absorbent body provided between the surface side sheet material and the back surface sheet, the second absorbent body being fixed to the back surface sheet; a first adhesive for fixing the surface layer and the cover sheet to each other, the first adhesive being applied between the surface layer and the cover sheet; a second adhesive for fixing the cover sheet and the first absorbent body to each other, the second adhesive being applied between the cover sheet and the first absorbent body; a third adhesive for fixing the first absorbent body and the back layer to each other, the third adhesive being applied between the first absorbent body and the back layer; and a fourth adhesive for fixing the back layer and the second absorbent body to each other, the fourth adhesive being applied between the back layer and the second absorbent body, The liquid to be absorbed at least partially by the first absorbent body is Children Before being fed, the surface side sheet material The back surface layer is formed with the fourth adhesive. the second absorbent body is fixed to the second absorbent body, and the absorption target is supplied to the second absorbent body from the wearer side via the surface-side sheet material. The surface of the second absorbent body to which the fourth adhesive is applied becomes brittle by absorbing the object to be absorbed. Later, the wearer skin the surface-side sheet material attached to The surface layer of According to the change in the posture of the wearer, The types or application amounts of the first to fourth adhesives are determined so that, when pulled toward the wearer, the surface layer, the cover sheet, the back layer, and the first absorbent body of the surface-side sheet material follow the skin of the wearer while maintaining a state in which they are fixed to each other by the first to third adhesives, and so that the surface layer, the cover sheet, the back layer, and the first absorbent body of the surface-side sheet material are separated from the second absorbent body and the back sheet.

[0009] The absorbent article according to claim 2 is the absorbent article according to claim 1, The first absorbent body has a slit that runs from the surface layer side to the back layer side. [Effects of the Invention]

[0012] According to the absorbent article of claim 1, for example, It is possible to reliably absorb the object to be absorbed. , suck It is possible to reliably absorb the object to be collected with a simple structure. Furthermore, for example, before the wearer excretes the absorption target for the first time, the stiffness of the absorbent article can be reduced, and the usability of the absorbent article can be improved. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a plan view showing a configuration of a diaper according to an embodiment. [Figure 2] FIG. 2 is a perspective view of the diaper of FIG. 1 in an assembled state. [Figure 3] FIG. 2 is a plan view showing the configuration of the absorbent article. [Figure 4] FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 5] FIG. 4 is a cross-sectional view taken along the arrow BB in FIG. 3. [Figure 6] FIG. 2 is a cross-sectional view of the absorbent article in a state where no liquid excrement has been absorbed. [Figure 7] FIG. 2 is a cross-sectional view of the absorbent article in a state where liquid excrement has been absorbed. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the absorbent article according to the present invention will be described in detail with reference to the accompanying drawings. First, the overall structure of the absorbent article will be described, then a method for wearing the absorbent article will be described, then a method for manufacturing the absorbent article will be described, then the absorption of urine (a body waste material to be absorbed) by the absorbent article will be described, and finally, modified examples of the embodiments will be described. However, the present invention is not limited to the embodiments.

[0018] (composition) The absorbent article according to the embodiment may be applied to any object. For example, the absorbent article may be applied to an infant diaper, an adult diaper, a pet diaper, etc. In the following, the wearer of the absorbent article is assumed to be an adult, and an example in which the absorbent article is applied to an adult diaper worn to capture and absorb urine, which is excrement, will be described.

[0019] First, a diaper to which the absorbent article is applied will be described. Fig. 1 is a plan view showing the configuration of a diaper according to an embodiment. Fig. 2 is a perspective view showing the diaper of Fig. 1 in an assembled state. In the following description, the X direction in Fig. 1 is the short direction, the Y direction is the long direction, and the shape shown in Fig. 1 is the planar shape. In Fig. 2, the outer shape of the absorbent article 4 is shown as a rectangle for ease of explanation. As shown in Figs. 1 and 2, the diaper 1 is configured by fixing the absorbent article 4 to a diaper main body 2. The surface of the diaper main body 2 that faces the wearer's skin is referred to as the inner surface, and the surface opposite to the side facing the wearer's skin is referred to as the outer surface (the same applies to the absorbent article 4).

[0020] (Configuration - Diaper body) The diaper body 2 is the basic structure of the diaper 1. The diaper body 2 is provided with an outer sheet 3. The diaper body 2 is divided into a front waist portion 2a that covers the wearer's abdomen, a rear waist portion 2b that covers the wearer's back, and a crotch portion 2c that is provided between the front waist portion 2a and the rear waist portion 2b and covers the wearer's crotch. The diaper body 2 also includes a fastener 2d. As shown in FIG. 2, the fastener 2d is a fastening means that fastens the front waist portion 2a and the rear waist portion 2b together when the diaper 1 is assembled. Specifically, the fastener 2d can be formed using a known hook-and-loop fastener or the like.

[0021] (Configuration - Diaper body - Outer sheet) The exterior sheet 3 is a holding means for holding the absorbent article 4. Specifically, as shown in Fig. 1, the exterior sheet 3 is configured to include an outer sheet 3a and an inner sheet 3b.

[0022] The outer sheet 3a is a sheet that covers the exterior of the diaper body 2. Specifically, as shown in Fig. 1, the outer sheet 3a is a sheet-like body having a generally hourglass shape in plan view, and is made of a water-repellent nonwoven fabric made of chemical fibers. The outer sheet 3a is provided over the front waistband 2a, the back waistband 2b, and the crotch region 2c.

[0023] The inner sheet 3b is a sheet at least partially contacting the wearer's skin when the diaper 1 is worn. Specifically, as shown in FIG. 1, the inner sheet 3b is a sheet-like body having a planar shape similar to that of the outer sheet 3a (approximately an hourglass shape), and is made of a water-repellent nonwoven fabric made of chemical fibers. The inner sheet 3b is provided across the front waistband 2a, the rear waistband 2b, and the crotch region 2c, and at least a portion of the inner sheet 3b is fixed to the outer sheet 3a by adhesive, welding, or the like. The inner sheet 3b actually has three-dimensional gathers (not shown) that allow the absorbent article 4 to be sandwiched between the three-dimensional gathers. However, the structure for sandwiching the absorbent article 4 and the structure of the three-dimensional gathers of the diaper body 2 are known structures, and are not shown in FIGS. 1 and 2 for ease of explanation.

[0024] (Configuration - Absorbent article) Next, the absorbent article 4 will be described. Fig. 3 is a plan view showing the configuration of the absorbent article, Fig. 4 is a cross-sectional view taken along the line AA in Fig. 3, and Fig. 5 is a cross-sectional view taken along the line BB in Fig. 3. In Fig. 4, the thickness of each adhesive (thickness in the vertical direction of the drawing) is shown to be thicker than the actual thickness in order to explain the features of the present invention (the same applies to the distance between each component in Fig. 5). In Fig. 5, the three-dimensional gathers 41 and adhesive are omitted for ease of explanation. In Fig. 5, the ends of some of the components are actually slightly curved and bonded together with adhesive, but since the actual amount of curvature is very small, each component is shown in a straight line in Fig. 5 for ease of explanation.

[0025] The absorbent article 4 is also configured to include a three-dimensional gather 41, a top sheet 42, a cover sheet 43, an upper-layer absorbent body 44, an intermediate sheet 45, a lower-layer absorbent body 46, a carrier sheet 47, and a back sheet 48. The top sheet 42, the cover sheet 43, and the intermediate sheet 45 correspond to the "surface-side sheet material."

[0026] (Configuration - Absorbent article - Three-dimensional gathers) The three-dimensional gathers 41 are leakage prevention means that prevent urine and other excrement (hereinafter simply referred to as "excrement") to be absorbed from leaking outside the absorbent article 4. Specifically, as shown in Figures 3 and 4, the three-dimensional gathers 41 are formed using known three-dimensional gathers, and the ends on the outer surface side (the side opposite the side facing the wearer's skin) are fixed to the backsheet 48 by adhesive, welding, or the like, and the ends of the topsheet 42 are fixed to parts of the three-dimensional gathers 41 by adhesive, welding, or the like. Note that in Figure 4, the part of the three-dimensional gathers 41 between the part where the backsheet 48 is fixed and the part where the end of the topsheet 42 is fixed is shown as straight, but in reality it is curved or folded, and is configured so that the distance between the topsheet 42 and the backsheet 48 when the three-dimensional gathers 41 are fixed can be changed, as will be explained in the "Absorption of liquid excrement by an absorbent article" section below.

[0027] (Configuration - Absorbent article - Top sheet) The top sheet 42 is a surface layer that contacts the wearer's skin and constitutes part of the multi-layer structure of the surface-side sheet material. Specifically, as shown in FIGS. 3 to 5, the top sheet 42 is a sheet-like body with a substantially rectangular planar shape, and as shown in FIG. 5, its length in the longitudinal direction is substantially the same as that of the back sheet 48, and is longer than the other components. The top sheet 42 is also formed of a material that is permeable to liquid excrement, such as a hydrophilic nonwoven fabric. Any fiber may be used to form such a nonwoven fabric, and may include, for example, hydrophilic fibers such as cellulose, rayon, or cotton, as well as hydrophobic fibers such as polypropylene, polyethylene, polyester, or polyamide whose surfaces have been hydrophilically treated with a surfactant (the same applies to the nonwoven fabrics of the other components described below).

[0028] (Configuration - Absorbent article - Cover sheet) The cover sheet 43 constitutes part of the multiple structures of the surface-side sheet material. Specifically, as shown in FIGS. 3 to 5, the cover sheet 43 is a sheet-like body having a substantially rectangular planar shape, and both the longitudinal and lateral lengths are shorter than those of the top sheet 42. The cover sheet 43 is formed of a material that is permeable to liquid excrement, such as a hydrophilic nonwoven fabric. The density of the cover sheet 43 is optional, but may be, for example, 0.02 g / cm 3 to 0.15 g / cm 3 . The cover sheet 43 is fixed to the top sheet 42 by a first adhesive 51, as shown in FIG. 4. The first adhesive 51 will be described later.

[0029] (Configuration - Absorbent article - Upper absorbent body) The upper-layer absorbent body 44 is a first absorbent body provided between the front layer and the back layer of the front-side sheet material, and is configured to absorb liquid excrement. Specifically, as shown in FIGS. 3 to 5, the upper-layer absorbent body 44 is a sheet-like body having a substantially rectangular planar shape, with a longitudinal length shorter than that of the cover sheet 43 and a lateral length substantially equal to that of the cover sheet 43. The upper-layer absorbent body 44 is formed of a material capable of absorbing liquid excrement, such as hydrophilic fibers such as pulp fibers, hydrophilic chemical fibers made from polymeric materials, or a combination of the hydrophilic fibers with a highly absorbent material such as granular superabsorbent polymer (SAP (Super Absorbent Polymer)). The basis weight of the upper-layer absorbent body 44 is optional, and may be, for example, 50 g / m² to 900 g / m² of the pulp and the highly absorbent polymer combined. The upper-layer absorbent body 44 is fixed to the cover sheet 43 with a second adhesive 52. The second adhesive 52 will be described later. The upper absorbent body 44 also has two slits 441.

[0030] (Configuration - Absorbent article - Upper absorbent body - Slit) The slits 441 are through-holes that diffuse liquid excrement to promote absorption and directly bond the cover sheet 43 and the intermediate sheet 45 together. As shown in FIG. 3, the slits 441 are elongated holes extending in the longitudinal direction, and as shown in FIG. 4, they extend from the cover sheet 43 side to the intermediate sheet 45 side, with a second adhesive 52 and a third adhesive 53 applied to the interior of the slits 441. The third adhesive 53 will be described later. The size of the slits 441 is arbitrary, but from the viewpoint of firmly bonding the cover sheet 43 and the intermediate sheet 45 together with the second adhesive 52 and the third adhesive 53 in the slits 441, the ratio of the area of ​​the slits 441 to the area of ​​the upper absorbent body 44 in plan view may be set to be approximately 4.0% to 30.0%.

[0031] (Configuration - Absorbent article - Intermediate sheet) The intermediate sheet 45 is a back surface layer provided on the back side of the top sheet 42 (the side opposite to the side facing the wearer's skin) and constitutes part of the multiple-layer structure of the front sheet material. Specifically, as shown in FIGS. 3 to 5, the intermediate sheet 45 is a sheet-like body having substantially the same planar shape and size as the cover sheet 43. The intermediate sheet 45 is formed of a material that is permeable to liquid excrement, such as a hydrophilic nonwoven fabric. The density of the intermediate sheet 45 is optional, but may be, for example, 0.02 g / cm 3 to 0.15 g / cm 3 . As shown in FIG. 4, the intermediate sheet 45 is fixed to the upper-layer absorbent body 44 with a third adhesive 53. Since the second adhesive 52 and the third adhesive 53 are applied to the slits 441 of the upper-layer absorbent body 44, the intermediate sheet 45 is also directly fixed to the cover sheet 43 with these adhesives. Furthermore, as shown in FIG. 5, the longitudinal length of the upper absorbent body 44 is shorter than the longitudinal lengths of the intermediate sheet 45 and the cover sheet 43, so the longitudinal ends of the intermediate sheet 45 and the cover sheet 43 (the ends on the left side of FIG. 5 and the ends on the right side of FIG. 5) are directly fixed together by the second adhesive 52 and the third adhesive 53 of FIG. 4.

[0032] (Configuration - Absorbent article - Lower absorbent body) The lower-layer absorbent body 46 is a second absorbent body provided between the surface-side sheet material (i.e., the top sheet 42, the cover sheet 43, and the intermediate sheet 45) and the back sheet 48. It is fixed to the carrier sheet 47 (i.e., it is indirectly fixed to the back sheet 48 via the carrier sheet 47) and absorbs liquid body waste. Specifically, as shown in FIGS. 3 to 5, the lower-layer absorbent body 46 is a sheet-like body having a substantially hourglass shape in plan view, and its longitudinal length is substantially the same as that of the cover sheet 43, and both of its lateral lengths are longer than that of the cover sheet 43. The lower-layer absorbent body 46 is made of the same material or materials as the upper-layer absorbent body 44. The basis weight of the lower-layer absorbent body 46 is optional, but may be, for example, 50 g / m² to 900 g / m² of pulp and superabsorbent polymer combined. The lower-layer absorbent body 46 is fixed to the intermediate sheet 45 with a fourth adhesive 54, as shown in FIG. 4.

[0033] (Configuration - Absorbent article - Carrier sheet) The carrier sheet 47 is a sheet provided between the lower absorbent body 46 and the back sheet 48. The carrier sheet 47 is optional, but may be, for example, as shown in FIGS. 3 to 5, a sheet-like body having a substantially rectangular planar shape, with a longitudinal length substantially equal to that of the cover sheet 43, a lateral length as viewed from the line AA of FIG. 3 that is longer than that of the lower absorbent body 46, and a lateral length at a position corresponding to the wide portion of the lower absorbent body 46 that is shorter than that of the lower absorbent body 46. In other words, in the lateral direction, a portion of the lower absorbent body 46 protrudes from the carrier sheet 47 in planar form. The carrier sheet 47 may be made of any material, but may be made of the same material as that of the cover sheet 43. The carrier sheet 47 is fixed to the lower absorbent body 46 and the back sheet 48 by adhesive, welding, or the like.

[0034] (Configuration - Absorbent article - Backsheet) The back sheet 48 is a back sheet provided on the side of the surface-side sheet material (i.e., the top sheet 42, the cover sheet 43, and the intermediate sheet 45) opposite the wearer's skin, and is impermeable to liquid excrement. Specifically, as shown in FIGS. 3 to 5, the carrier sheet 47 is a sheet-like body having a planar shape similar to that of the lower absorbent body 46 (approximately an hourglass shape), with a longitudinal length substantially the same as that of the top sheet 42 and a lateral length longer than that of the carrier sheet 47. The back sheet 48 is a film body made of a material that is impermeable to liquid excrement, for example, a synthetic resin material such as polyethylene. As described above, the carrier sheet 47 is fixed to the back sheet 48 by adhesive or welding, and the ends of the three-dimensional gathers 41 are also fixed thereto. Furthermore, as shown in Figure 5, the longitudinal lengths of the cover sheet 43, upper absorbent body 44, intermediate sheet 45, and lower absorbent body 46 are shorter than the longitudinal lengths of the top sheet 42 and back sheet 48, so the longitudinal ends of the top sheet 42 and back sheet 48 (the ends on the left side of Figure 5 and the ends on the right side) are directly fixed together by the first adhesive 51 in Figure 4.

[0035] (Configuration - Absorbent article - Adhesive) Next, a description will be given of the first adhesive 51, the second adhesive 52, the third adhesive 53, and the fourth adhesive 54. When it is not necessary to distinguish between these adhesives, they will also be simply referred to as "each adhesive."

[0036] The first adhesive 51 is an adhesive that secures the top sheet 42 and the cover sheet 43 to each other and also secures the longitudinal ends of the top sheet 42 and the back sheet 48 to each other, and is applied between the components to be secured together. The second adhesive 52 is an adhesive that secures the cover sheet 43 and the upper-layer absorbent body 44 to each other and also secures the cover sheet 43 and the intermediate sheet 45 to each other via the slits 441, and is applied between the components to be secured together, particularly to the slits 441. The third adhesive 53 is an adhesive that secures the upper-layer absorbent body 44 and the intermediate sheet 45 to each other and also secures the cover sheet 43 and the intermediate sheet 45 to each other via the slits 441, and is applied between the components to be secured together, particularly to the slits 441. The fourth adhesive 54 is an adhesive that secures the intermediate sheet 45 and the lower-layer absorbent body 46 to each other and is applied between the components to be secured together.

[0037] The application pattern of these "adhesives" is arbitrary, and for example, they may be applied in one or more of an omega pattern, a spiral pattern, or a bead pattern. In this embodiment, however, they are applied in an omega pattern. For ease of explanation, Fig. 4 shows each "adhesive" as if it were applied to the entire surface of each position. However, in reality, each adhesive is applied only partially between the components shown, forming many relatively large gaps. Therefore, liquid excrement supplied to the absorbent article 4 from the inner surface side (the side facing the wearer's skin, the upper side in Fig. 4) passes through the top sheet 42 and the cover sheet 43 and reaches the upper-layer absorbent body 44, where it is at least partially absorbed. Furthermore, the remaining liquid excrement not absorbed by the upper-layer absorbent body 44 passes through the intermediate sheet 45 and reaches the lower-layer absorbent body 46, where it is absorbed.

[0038] The types and application amounts of these "adhesives" are also arbitrary, but for example, if the wearer excretes liquid excrement while wearing the absorbent article 4, the excrement will be supplied to the absorbent article 4 from the inner surface side (the side facing the wearer's skin, the upper side in Figure 4), and as described above, the liquid excrement will be absorbed by the upper absorbent body 44 and the lower absorbent body 46. In this case, if the wearer changes their position, the top sheet 42 may adhere to and follow the wearer's skin, and in this case, it is expected that the top sheet 42 will be pulled toward the inner surface side (the upper side in Figure 4) in Figure 4. In such an assumption (i.e., when the top sheet 42 is pulled toward the inner surface (upper side of the drawing in Figure 4) after the upper absorbent body 44 and the lower absorbent body 46 have absorbed liquid excrement), the type and amount of application of each adhesive will be determined so as to satisfy the condition that at least the upper absorbent body 44 remains fixed to the top sheet 42 and the upper absorbent body 44 follows the top sheet 42.

[0039] Then, experiments and simulations are conducted to determine the type and application amount of each adhesive that satisfies the above-mentioned conditions, and a hot-melt adhesive is used as the type of "each adhesive." Furthermore, the application amounts of the first adhesive 51, the second adhesive 52, the third adhesive 53, and the fourth adhesive 54 are each determined to correspond to the results of the above-mentioned experiments and simulations. In particular, the application amount of the adhesive within the slit 441 may be, for example, within the range of 1.0 g / m² (hereinafter, the unit of application amount, "g / m²" will be omitted) to 15.0 g, preferably within the range of 2.0 g / m² to 10.0 g, and more preferably within the range of 4.0 g / m² to 8.0 g.

[0040] When each adhesive was applied as described above, a specified tensile test was conducted to confirm that the wet strength between the cover sheet 43 and the intermediate sheet 45 fixed with the second adhesive 52 and the third adhesive 53 was 3.0 kN / 25 mm or more.

[0041] (How to wear an absorbent article) Next, a method of putting on the absorbent article 4 will be described. In the method of putting on the absorbent article 4, first, in Fig. 1, the absorbent article 4 is attached to the diaper main body 2 by sandwiching the absorbent article 4 between three-dimensional gathers (not shown) of the diaper main body 2. Next, the front waist portion 2a, the rear waist portion 2b, and the crotch portion 2c of the diaper main body 2 cover the wearer's abdomen, back, and crotch, and then, as shown in Fig. 2, the front waist portion 2a and the rear waist portion 2b are fastened together using the fastener portion 2d, thereby putting the absorbent article 4 on the wearer.

[0042] (Method for manufacturing absorbent articles) Next, a method for manufacturing the absorbent article 4 described above will be described. As shown in FIG. 4, the absorbent article 4 is manufactured by stacking and fixing each component element using an adhesive. The order of bonding may be arbitrary as long as the absorbent article 4 shown in FIG. 4 is ultimately manufactured. The components may be bonded sequentially from the bottom of the drawing, or may be bonded in groups. For example, first, the lower-layer absorbent body 46 and the carrier sheet 47 are bonded to the back sheet 48, and the cover sheet 43, the upper-layer absorbent body 44, and the intermediate sheet 45 are bonded to each other. Next, for example, the cover sheet 43, the upper-layer absorbent body 44, and the intermediate sheet 45, which have been bonded to each other, are bonded to the lower-layer absorbent body 46, and then the top sheet 42 is bonded to the back sheet 48. Finally, for example, the three-dimensional gathers 41 are bonded to the back sheet 48. This completes the manufacture of the absorbent article 4 shown in FIGS. 3 to 5.

[0043] (Absorption of liquid excrement by absorbent articles) Next, the absorption of liquid excrement by the above-described absorbent article 4 will be described. Fig. 6 is a cross-sectional view of the absorbent article in a state where no liquid excrement has been absorbed, and Fig. 7 is a cross-sectional view of the absorbent article in a state where liquid excrement has been absorbed. Note that Figs. 6 and 7 are cross-sectional views corresponding to the cross-sectional view of Fig. 4, and for the sake of convenience of explanation, the three-dimensional gathers 41 are omitted from the illustration.

[0044] When the wearer puts on the absorbent article 4 using the diaper body 2 and before excreting liquid body waste, the components are fixed to each other with adhesive or the like as shown in Figure 6. Therefore, even if the wearer changes their posture, the relative positions of the components of the absorbent article 4 remain fixed, and the absorbent article 4 does not become stiff, maintaining the wearer's comfort.

[0045] If the wearer subsequently excretes liquid body waste, as described above, the body waste will be supplied to the absorbent article 4 from the inner surface side (the side facing the wearer's skin, the upper side in FIG. 6 ), and the liquid body waste will be absorbed by the upper absorbent body 44 and the lower absorbent body 46. In this case, the lower absorbent body 46 absorbs the liquid body waste, and the surface of the lower absorbent body 46 (the surface to which the fourth adhesive 54 is applied) becomes brittle and prone to peeling. If the wearer subsequently changes their position, the top sheet 42 may adhere to and follow the wearer's skin, and in this case, in FIG. 5 , the top sheet 42 will be pulled toward the inner surface side (the upper side in FIG. 6 , the direction indicated by the outline arrow). In this case, the cover sheet 43, the upper-layer absorbent body 44, and the intermediate sheet 45 (hereinafter, the cover sheet 43, the upper-layer absorbent body 44, and the intermediate sheet 45 will also be simply referred to as the "upper-layer absorbent body 44, etc.") are firmly fixed to the top sheet 42 by the first adhesive 51, the second adhesive 52, and the third adhesive 53, and therefore the "upper-layer absorbent body 44, etc." will move toward the inner surface while following the top sheet 42 (i.e., following the wearer's skin) while being fixed to the top sheet 42. When the "upper-layer absorbent body 44, etc." moves following the top sheet 42, the surface of the lower-layer absorbent body 46, which is easily peeled as described above, peels off, and the "upper-layer absorbent body 44, etc." will move separately from the lower-layer absorbent body 46 and the back sheet 48, as shown in Figure 7. In reality, as mentioned above, the longitudinal ends of the top sheet 42 and the back sheet 48 are fixed to each other, so when the "upper absorbent body 44, etc." moves separately from the lower absorbent body 46 and the back sheet 48, it is expected that the shape of at least some of these components will bend slightly; however, for the sake of convenience, this slight bending is not shown in the illustration here.

[0046] In this way, the "upper-layer absorbent body 44, etc." moves toward the inner surface, following the top sheet 42 (i.e., following the wearer's skin), so that if the wearer excretes liquid waste again, at least the liquid waste will be absorbed by the upper-layer absorbent body 44, making it possible to prevent the liquid waste from leaking from the diaper 1 of Figure 2.

[0047] (Effects of the embodiment) Thus, according to the embodiment, by providing the upper-layer absorbent body 44 provided between the top sheet 42, which is the surface layer of the surface-side sheet material, and the intermediate sheet 45, which is the back layer fixed to the top sheet 42, it is possible to reliably absorb an object to be absorbed, even when the top sheet 42 conforms to the wearer's skin, because the upper-layer absorbent body 44 conforms to the wearer's skin together with the top sheet 42. Furthermore, a simple structure can be achieved in which the upper-layer absorbent body 44 is fixed between the top sheet 42 and intermediate sheet 45 of the surface-side sheet material, making it possible to reliably absorb an object to be absorbed with a simple structure.

[0048] Furthermore, since the surface-side sheet material is fixed to the lower-layer absorbent body 46 before the absorbent object, at least a portion of which is absorbed by the upper-layer absorbent body 44, is supplied from the wearer to the surface-side sheet material, it is possible to reduce the stiffness of the absorbent article 4, for example, before the wearer excretes the absorbent object for the first time, thereby improving the usability of the absorbent article 4.

[0049] Furthermore, the upper absorbent body 44 has slits 441 to which the second adhesive 52 and the third adhesive 53 are applied to secure the top sheet 42 side and the intermediate sheet 45 side to each other, thereby making it possible to firmly secure the top sheet 42 side and the intermediate sheet 45 side, for example.

[0050] Furthermore, since the upper absorbent body 44 is fixed to at least the top sheet 42 with the first adhesive 51, the second adhesive 52, and the third adhesive 53 applied in an omega pattern, for example, relatively small amounts of the first adhesive 51, the second adhesive 52, and the third adhesive 53 can be applied approximately uniformly, thereby making it possible to reduce the cost of the absorbent article 4.

[0051] [Modifications to the embodiment] Although the embodiments of the present invention have been described above, the specific configurations and means of the present invention can be modified and improved as desired within the scope of the technical ideas of the inventions set forth in the claims. Such modifications will be described below.

[0052] (About the problem to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and the present invention may solve problems that are not described above or achieve effects that are not described above, or may solve only some of the problems that are described or achieve only some of the effects that are described.

[0053] (Regarding the top sheet 42, cover sheet 43, upper absorbent body 44, intermediate sheet 45, lower absorbent body 46, carrier sheet 47, and back sheet 48) The planar shapes of the top sheet 42, cover sheet 43, upper absorbent body 44, intermediate sheet 45, lower absorbent body 46, carrier sheet 47, and back sheet 48 in the above-mentioned embodiments may be changed as desired. For example, the roughly hourglass-shaped components described in the embodiments may be made rectangular, or conversely, the rectangular-shaped components may be made roughly hourglass-shaped.

[0054] In the above embodiment, the top sheet 42, cover sheet 43, upper-layer absorbent body 44, and intermediate sheet 45 in Fig. 4 are fixed to one another with adhesive, but this is not limiting. For example, the top sheet 42 and the intermediate sheet 45 may be integrally constructed in advance by welding or the like, and then the upper-layer absorbent body 44 may be provided between the integrally constructed top sheet 42 and intermediate sheet 45.

[0055] 4 of the above embodiment, the cover sheet 43 may be omitted. Also, for example, the slits 441 of the upper absorbent body 44 may be omitted.

[0056] (About combinations) Furthermore, the features of the above-described embodiment and the features of the modified example may be combined with each other.

[0057] (Addendum) The absorbent article of Appendix 1 comprises a multi-structured surface-side sheet material having a surface layer that contacts the wearer's skin and a back layer that is provided on the back side of the surface layer and fixed to the surface layer, and a first absorbent body that is provided between the surface layer and the back layer of the surface-side sheet material.

[0058] The absorbent article of Appendix 2 is the absorbent article of Appendix 1, further comprising: a back sheet provided on the side of the surface-side sheet material opposite the wearer's skin; and a second absorbent body provided between the surface-side sheet material and the back sheet, the second absorbent body being fixed to the back sheet; the surface-side sheet material is fixed to the second absorbent body before an object to be absorbed, at least a portion of which is to be absorbed by the first absorbent body, is supplied from the wearer side to the surface-side sheet material; and when the object to be absorbed is supplied from the wearer side to the surface-side sheet material, the surface-side sheet material separates from the second absorbent body.

[0059] The absorbent article of Appendix 3 is the absorbent article of Appendix 1 or 2, wherein the first absorbent body has a slit that runs from the surface layer side to the back layer side, and the slit is applied with an adhesive to fix the surface layer side and the back layer side to each other.

[0060] The absorbent article of Supplementary Note 4 is the absorbent article according to any one of Supplementary Notes 1 to 3, wherein the first absorbent body is fixed to at least the surface layer with an adhesive applied in an omega pattern.

[0061] (Effect of supplementary notes) According to the absorbent article described in Supplementary Note 1, by providing a first absorbent body provided between the surface layer of the surface-side sheet material and the back layer fixed to the surface layer, even if the surface layer conforms to the wearer's skin, the first absorbent body will conform to the wearer's skin together with the surface layer, making it possible to reliably absorb the object to be absorbed. Furthermore, since a simple structure can be achieved in which the first absorbent body is fixed between the surface layer and the back layer of the surface-side sheet material, it is possible to reliably absorb the object to be absorbed with a simple structure.

[0062] According to the absorbent article described in Appendix 2, before the absorption target, at least a portion of which is absorbed by the first absorbent, is supplied from the wearer side to the surface side sheet material, the surface side sheet material is fixed to the second absorbent body. This makes it possible, for example, to reduce the stiffness of the absorbent article before the wearer excretes the absorption target for the first time, thereby improving the usability of the absorbent article.

[0063] According to the absorbent article described in Appendix 3, the first absorbent body has slits through which adhesive is applied to fix the surface layer side and the back layer side to each other, making it possible, for example, to firmly fix the surface layer side and the back layer side.

[0064] According to the absorbent article described in Appendix 4, the first absorbent body is fixed to at least the surface layer with adhesive applied in an omega pattern, which allows, for example, a relatively small amount of adhesive to be applied approximately uniformly, making it possible to reduce the cost of the absorbent article. [Explanation of symbols]

[0065] 1 diaper 2 Diaper body 3 Exterior sheet 4. Absorbent articles 3a outer sheet 3b Inner sheet 2a Front waist circumference 2b Back waist area 2c inseam 2d zipper part 41 Three-dimensional gathers 42 top sheet 43 Cover Sheet 44 Upper absorber 45 Middle seat 46 Lower absorber 47 Career Sheet 48 Back Seat 51 First Adhesive 52 Second Adhesive 53 Third Adhesive 54 Fourth Adhesive 441 Slit

Claims

1. a multi-structured surface-side sheet material having a surface layer that contacts the wearer's skin, a cover sheet provided on the back side of the surface layer, and a back layer provided on the back side of the cover sheet; a first absorbent body provided between the cover sheet and the back surface layer of the surface side sheet material; a back sheet provided on the surface side sheet material opposite to the wearer's skin; a second absorbent body provided between the surface side sheet material and the back surface sheet, the second absorbent body being fixed to the back surface sheet; a first adhesive for fixing the surface layer and the cover sheet to each other, the first adhesive being applied between the surface layer and the cover sheet; a second adhesive for fixing the cover sheet and the first absorbent body to each other, the second adhesive being applied between the cover sheet and the first absorbent body; a third adhesive for fixing the first absorbent body and the backing layer to each other, the third adhesive being applied between the first absorbent body and the backing layer; a fourth adhesive for fixing the back surface layer and the second absorbent body to each other, the fourth adhesive being applied between the back surface layer and the second absorbent body; the back surface layer of the top-side sheet material is fixed to the second absorbent body with the fourth adhesive before a liquid object to be absorbed, at least a part of which is absorbed by the first absorbent body, is supplied from the wearer's side; and the types or application amounts of the first to fourth adhesives are determined so that, after the object to be absorbed is supplied from the wearer's side to the second absorbent body via the top-side sheet material and the surface of the second absorbent body to which the fourth adhesive is applied becomes brittle by absorbing the object to be absorbed, when the top surface layer of the top-side sheet material attached to the wearer's skin is pulled toward the wearer's side in response to a change in the wearer's posture, the top surface layer, the cover sheet, the back surface layer, and the first absorbent body follow the skin of the wearer while maintaining a state in which they are fixed to each other by the first to third adhesives, and the top surface layer, the cover sheet, the back surface layer, and the first absorbent body are separated from the second absorbent body and the back surface sheet. Absorbent articles.

2. The first absorbent body has a slit that extends from the surface layer side to the back layer side. The absorbent article of claim 1.

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