JP4990080B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper. More specifically, the present invention relates to a disposable diaper that includes an absorbent body, a top sheet, and a back sheet, and further includes a skin contact sheet that is disposed above the top sheet and has an opening through which feces can pass.

  In recent years, as a diaper for infants or elderly people / handicapped persons, an absorbent body, a top sheet that is arranged so as to cover the upper surface of the absorbent body, and at least partially made of a liquid-permeable material, and a lower surface of the absorbent body Disposable diapers that are arranged so as to cover the back and are provided with a back sheet made of a liquid-impermeable material are widely used. By using the disposable diaper so that the surface of the top sheet is in contact with the skin of the wearer, the urine excreted by the wearer permeates the top sheet and is absorbed and held by the absorber. In addition, the back sheet excellent in leakage prevention prevents the excrement from leaking to the outside of the diaper.

  However, in the disposable diaper having the above-described configuration, although urine passes through the top sheet, most of the stool does not pass through the top sheet and remains on the top sheet. Since the stool remaining on the top sheet adheres to the wearer's crotch and buttocks, it requires cumbersome wiping work, which increases the burden of childcare and care, and also causes skin troubles for the wearer. It was. Such a problem becomes more apparent when the stool excreted by the wearer is soft stool.

  Accordingly, a disposable diaper has been proposed in which another sheet body (hereinafter referred to as “skin contact sheet”) is disposed above the top sheet (for example, Patent Documents 1 and 2). reference). In these disposable diapers, an opening (stool passing opening) through which stool can pass is formed in the skin contact sheet, and the feces excreted by the wearer through the stool passing opening are on the top sheet. Configured to fall into.

Utility Model Registration No. 2559050 (paragraph 0010, FIG. 2) JP 2002-11044 A (paragraph 0020, FIG. 1)

  However, in such a disposable diaper, in order for the stool excreted by the wearer to accurately fall on the top sheet through the stool passage opening of the skin contact sheet, the skin contact sheet A stool passage opening must be located at the wearer's anus. Thus, in order to arrange the fecal passage opening at an appropriate position, it is important that the skin contact sheet is in close contact with the wearer's skin.

  For example, if the skin contact sheet is not in close contact with the wearer's skin, the position of the stool passage opening and the position of the wearer's anus are displaced due to the movement of the wearer, and the skin contact sheet does not function. .

  On the other hand, if the skin contact sheet is brought into close contact with the skin, the sweat of the wearer easily accumulates between the skin contact sheet, and it becomes easy to get stuffy at body temperature, or the skin is rubbed against the skin contact sheet, thereby giving irritation. There is a problem that.

  The present invention has been made to solve such problems of the prior art, and impairs the function of the skin contact sheet by reducing the contact area of the skin contact sheet on the side in contact with the skin. There is also provided a disposable diaper capable of reducing the feeling of close contact with the skin and improving the wearing feeling of the wearer.

  As a result of intensive studies to achieve the above-described problems, the present inventors have found that the above-described problems can be solved by the specific configuration shown below, and have completed the present invention.

  That is, according to this invention, the disposable diaper shown below is provided.

[1] An absorber, disposed so as to cover the upper surface of the absorber, a top sheet made of at least a part of a liquid-permeable material, and disposed so as to cover the lower surface of the absorber, and impermeable to liquid A skin contact sheet that is disposed above the top sheet and has a stool passing opening that allows stool to pass therethrough, the skin contact sheet on the wearer side. The upper sheet has a laminated structure in which a liner sheet arranged on the lower surface of the upper sheet is laminated, and the upper sheet has a plurality of liquid impermeable sheets or water repellent sheets as a base material. The perforation passage opening is formed in a perforated sheet in which openings are formed, and the liner sheet is obtained by subjecting a nonwoven fabric made of thermoplastic resin to a hydrophilic treatment. The stool passage opening is formed in the sheet, and the plurality of openings have an area on the upper surface side of the porous sheet larger than an area on the lower surface side, and from the upper surface side of the porous sheet. It is formed so that the area of each aperture is gradually reduced toward the lower surface side, and the total area of the apertures on the upper surface side of the porous sheet is relative to the total area of the porous sheet, Ri der range of 30% to 70%, and the area of the apertures in the upper surface of the porous sheet, the area of the apertures in the lower surface of the perforated sheet, 1.5-5 Baidea Ru disposable Diapers.

[2] The perforated sheet is formed so that a peripheral portion of the base material in which the opening is formed protrudes toward the lower surface side of the base material so that the area of each opening gradually decreases. The disposable diaper according to [1], which is a thing.

[ 3 ] An absorber, arranged to cover the upper surface of the absorber, at least partly made of a liquid permeable material, and arranged to cover the lower surface of the absorber, liquid impermeable A skin contact sheet that is disposed above the top sheet and has a stool passing opening that allows stool to pass therethrough, the skin contact sheet on the wearer side. The upper sheet has a laminated structure in which a liner sheet arranged on the lower surface of the upper sheet is laminated, and the upper sheet has irregularities in which a plurality of depressions are formed on the surface of the substrate. are those wherein flights passing opening is formed in the sheet, and the liner sheet, the nonwoven fabric made of a thermoplastic resin sheet having been subjected to hydrophilic treatment bowel movement Are those use opening is formed, the recess portion, toward the lower side from the upper surface of the uneven sheet is configured such that the total area of the recess is gradually reduced, the upper surface of the uneven sheet the total area of the recess in the side is, the the total area of the concavo-convex sheet state, and are in the range of 30% to 70%, the total area of the recess in the upper surface of the uneven sheet, the recess 1.2 to 4-fold range in der Ru disposable diaper of the total area of the recessed portion at an intermediate position of the depth.

[ 4 ] The disposable diaper according to [ 3 ], wherein the concave-convex sheet is a non-woven fabric made of a thermoplastic resin and the depression is formed.

[ 5 ] Between the upper sheet and the liner sheet constituting the skin contact sheet, at least a pair of opening stretchable members disposed along the outer edge of the stool passing opening is attached. The disposable diaper according to any one of [1] to [ 4 ].

[ 6 ] The disposable diaper according to any one of [1] to [ 5 ], wherein at least a pair of three-dimensional gathers that are three-dimensionally standing leak-proof walls are formed on both sides of the skin contact sheet.

  The disposable diaper of the present invention reduces the contact area on the side of the skin contact sheet that comes into contact with the skin, thereby reducing the feeling of close contact with the skin without impairing the function of the skin contact sheet. Can be improved.

  Furthermore, the disposable diaper of the present invention is configured such that the upper sheet constituting the skin contact sheet gradually decreases the area of each opening or the total area of the recesses from the upper surface side toward the lower surface side. Yes. For this reason, the wearer's sweat and urine riding on the skin contact sheet can be quickly dropped down, and the skin feel (dryness) of the surface of the skin contact sheet can be maintained.

  Hereinafter, the best mode for carrying out the disposable diaper of the present invention will be specifically described by taking a two-piece type pant diaper as an example. However, the present invention broadly encompasses disposable diapers having the invention specific items, and is not limited to the following embodiments. In addition, about FIG.3, FIG.4, FIG.8, FIG.9 and FIG. 12, for the convenience of drawing, it drawn in the form which left the leg expansion-contraction material from drawing.

  In addition, in this specification, when calling it "pants type diaper", like the disposable diaper 1 shown in FIGS. 1-4, the side edge parts (side edge part 2a, 6a) of the front body 2 and the back body 6 correspond. , The side edge portions 2b and 6b) are joined to form a joint portion 8, one waist opening portion 10 and a pair of leg opening portions 12a and 12b, which means a diaper configured in a pants shape in advance. Shall. And the “two-piece type” means an absorbent main body 14 that functions to absorb and retain the excrement of the wearer (absorption / holding function) and a function (wearing function) that encapsulates the wearer's body. It shall consist of the exterior member 16 to bear, and shall mean the diaper of the type by which the absorptive main body 14 was arrange | positioned inside the exterior member 16. FIG. As shown in FIG. 3, the absorbent main body 14 is a member that includes an absorbent body 22, a top sheet 18, and a back sheet 20 as components.

  In addition, in this specification, “front body” means a part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means that the wearer wears a diaper. When the wearer wears a diaper, the part covering the inseam of the wearer means the part covering the back side (back of the body) of the wearer.

[1] Configuration of the disposable diaper of the present invention:
First, a first embodiment of the disposable diaper of the present invention will be described. As shown in FIGS. 1-5, the disposable diaper 1 of 1st embodiment is arrange | positioned so that the upper surface of the absorber 22 and the absorber 22 may be coat | covered, and the top which at least one part consists of a liquid-permeable material. A stool passing opening that includes a sheet 18 and a back sheet 20 that is disposed so as to cover the lower surface of the absorber 22 and is made of a liquid-impermeable material, is disposed above the top sheet 18 and can pass stool. It is a disposable diaper further provided with the skin contact sheet | seat 50 in which 54 was formed.

  In the disposable diaper 1 of the first embodiment, the skin contact sheet 50 is a laminate in which an upper sheet 50a arranged on the wearer side and a liner sheet 50b arranged on the lower surface of the upper sheet 50a are laminated. It has a structure.

And in the disposable diaper 1 of 1st embodiment, the said upper sheet | seat 50a has the said stool passage opening part 54 formed in the porous sheet 60 by which the several opening 52 was formed in the base material. As shown in FIG. 6, each opening 52 of the upper sheet 50 a has an area S _a1 on the upper surface side 61 of the porous sheet 60 that is larger than an area S _a2 on the lower surface side 62. It is formed so that the area of each hole 52 gradually decreases from the upper surface side 61 toward the lower surface side 62, and the total area of the holes on the upper surface side of the porous sheet 60 is the total area of the porous sheet 60. Is in the range of 30 to 70%.

  Here, FIG. 1 is a figure which shows the state which looked at 1st embodiment (underpants type diaper) of the disposable diaper of this invention from the front. Moreover, FIG. 2 is a top view which expands 1st embodiment of the disposable diaper of this invention, and shows the state seen from the absorptive main body side of a diaper, FIG. 3 shows the disposable diaper shown in FIG. FIG. 4 is a schematic cross-sectional view showing a cross section cut along the line -A ′, and FIG. 4 is a schematic cross-sectional view showing a cross section taken along the line BB ′ of the disposable diaper shown in FIG. These are schematic sectional drawings which show the cross section which cut | disconnected the disposable diaper shown in FIG. 2 along CC 'line. FIG. 6 is a partially enlarged view of the upper sheet constituting the skin contact sheet of the disposable diaper shown in FIG.

  In general, in a disposable diaper provided with a skin contact sheet, in order for the stool excreted by the wearer to accurately fall on the top sheet through the stool passage opening of the skin contact sheet, It is important that the skin contact sheet is in close contact with the wearer's skin. For example, if the skin contact sheet is not in close contact with the wearer's skin, the position of the stool passage opening and the position of the wearer's anus are displaced due to the movement of the wearer, and the skin contact sheet does not function. .

  However, the disposable diaper provided with the conventional skin contact sheet uses a water-repellent nonwoven fabric or a mesh sheet with a uniform opening in the thickness direction as the skin contact sheet. When the skin is brought into close contact with the skin, the wearer's sweat is likely to accumulate between the skin contact sheet, and it becomes easy to get stuffy at body temperature, and the skin is rubbed against the skin contact sheet, thereby causing irritation.

  In the disposable diaper of the first embodiment, as the upper sheet constituting the skin contact sheet, a perforated sheet in which a hole having a specific shape described above is formed and an opening for passing stool is used is used. By reducing the contact area of the skin contact sheet that comes into contact with the skin, it is possible to reduce the feeling of close contact with the skin without impairing the function of the skin contact sheet and to improve the wearer's feeling of wearing.

  Furthermore, the disposable diaper of the first embodiment is configured such that the upper sheet constituting the skin contact sheet gradually decreases the area of each opening from the upper surface side to the lower surface side of the porous sheet. As a result, the sweat of the wearer and a small amount of urine riding on the skin contact sheet can be quickly dropped downward, and the skin feel (dryness) of the surface of the skin contact sheet can be maintained.

  Next, a second embodiment of the disposable diaper of the present invention will be described. 7-10, the disposable diaper 100 of 2nd embodiment is arrange | positioned so that the upper surface of the absorber 22 and the absorber 22 may be coat | covered, and the top which at least one part consists of a liquid-permeable material. A stool passing opening that includes a sheet 18 and a back sheet 20 that is disposed so as to cover the lower surface of the absorber 22 and is made of a liquid-impermeable material, is disposed above the top sheet 18 and can pass stool. 54 is further provided. The skin contact sheet 70 is formed by laminating an upper sheet 70a disposed on the wearer side and a liner sheet 70b disposed on the lower surface of the upper sheet 70a. The upper sheet 70a has a laminated structure, and the stool passage opening 5 is formed on the concavo-convex sheet 80 in which a plurality of dents 72 are formed on the surface of the substrate. As shown in FIG. 11, the recess 72 is configured such that the total area of the recess 72 gradually decreases from the upper surface side to the lower surface side of the uneven sheet 80. The disposable diaper 100 is such that the total area of the depressions 72 on the upper surface side of the sheet 80 is within a range of 30 to 70% with respect to the total area of the uneven sheet 80.

  Here, FIG. 7 is a plan view showing a state where the second embodiment of the disposable diaper of the present invention is developed and seen from the absorbent main body side, and FIG. 8 is a diagram showing the disposable diaper shown in FIG. 9 is a schematic cross-sectional view showing a cross section cut along the line DD ′, and FIG. 9 is a schematic cross-sectional view showing a cross section taken along the line EE ′ of the disposable diaper shown in FIG. 10 is a schematic cross-sectional view showing a cross section of the disposable diaper shown in FIG. 7 cut along the line FF ′. FIG. 11 is a partially enlarged view of the upper sheet constituting the skin contact sheet of the disposable diaper shown in FIG.

  In the disposable diaper of the second embodiment, as in the first embodiment described so far, as the upper sheet of the skin contact sheet, a porous sheet having a plurality of holes formed in the base material is not used. There is used a concavo-convex sheet in which a concave portion due to the concavo-convex is formed on the surface of the substrate.

  The disposable diaper of the second embodiment is configured such that the upper sheet constituting the skin contact sheet is configured so that the total area of the recesses gradually decreases from the upper surface side to the lower surface side of the uneven sheet. The effect similar to the disposable diaper of 1st embodiment of this invention shown in FIGS. 1-6 demonstrated until now can be acquired.

  Specifically, in the disposable diaper according to the second embodiment, in order to improve the wearer's wearing feeling, a concave portion having a specific shape due to irregularities is formed on the surface of the irregular sheet. By this dent, the contact area of the skin contact sheet on the side in contact with the skin can be reduced, and the wearer's feeling of wearing can be improved.

  In addition, the total area of the recess is gradually reduced from the upper surface side to the lower surface side of the concavo-convex sheet, so that the sweat of the wearer and the urine riding on the skin contact sheet can be quickly dropped downward. In addition, the touch feeling (dryness) of the skin contact sheet surface can be maintained.

  Hereinafter, each structure of the disposable diaper of this invention is demonstrated more concretely.

[1-1] Skin contact sheet:
The skin contact sheet is a member for separating the wearer's skin and the top sheet, and is a sheet-like member that is disposed above the top sheet and in which a fecal passage opening that allows passage of feces is formed. By providing this skin contact sheet, the skin contact sheet is first brought into contact with the wearer's skin, so that the top sheet disposed below the skin contact sheet is difficult to directly contact the wearer's skin. That is, the wearer's skin and the top sheet are separated from each other. In addition, a shielding layer called a skin contact sheet is interposed between the top sheet and the wearer's skin. Therefore, even if the stool remains on the top sheet, it is possible to greatly reduce the chance that the stool and the skin of the wearer are in direct contact.

  The skin contact sheet of the disposable diaper of this embodiment has a laminated structure in which an upper sheet arranged on the wearer side and a liner sheet arranged on the lower surface of the upper sheet are laminated. Specifically, the skin contact sheet is configured by bonding two sheet materials (an upper sheet and a liner sheet).

  In addition, the disposable diaper 1 shown in FIG. 2 uses a shape that covers the entire surface of the top sheet 18 as the skin contact sheet 50. However, the skin contact sheet in the disposable diaper of the present invention is not limited to this, and a sheet body disposed above the surface of the top sheet is sufficient.

  The skin contact sheet can be fixed by (1) bonding the sheet materials 32a and 32b constituting the three-dimensional gathers 26a and 26b and the top sheet 18 (or the back sheet 20) as in the disposable diaper 1 shown in FIG. The method of fixing the skin contact sheet 50 so as to be sandwiched between the parts, (2) The skin contact sheet is fixed to the inner surface of the three-dimensional gather, between the upper edge and the lower end edge (standing line) of the three-dimensional gather And the like. Moreover, you may fix a skin contact sheet to the inner area | region enclosed by the solid gather which becomes a pair, without making it contact with a solid gather. For example, (3) a method of fixing the skin contact sheet to the bonded portion (so-called flap portion) of the top sheet and the back sheet of the absorbent main body in the region surrounded by the three-dimensional gather can be exemplified. Among these methods, the method (1) is preferable in that the effect of closely attaching the skin contact sheet to the wearer's skin is high.

[1-1a] Upper sheet:
In the disposable diaper of the first embodiment, a porous sheet in which a plurality of holes are formed in the base material is used as the above-described upper sheet, and in the disposable diaper of the second embodiment, A concavo-convex sheet having a plurality of depressions due to concavo-convex formed on the surface is used.

  As described above, the porous sheet in which a plurality of apertures are formed and the uneven sheet in which a plurality of depressions due to the unevenness are formed on the surface can reduce the contact area of the skin contact sheet on the side in contact with the skin. The liquid can be quickly dropped downward by the opening or the depression.

  In the disposable diaper 1 of the first embodiment shown in FIGS. 2 to 5, the upper sheet 50 a of the skin contact sheet 50 is a punching sheet in which an opening 52 is formed, and the upper sheet is formed by the opening 52. This is an example in which substantially the entire 50a is configured as a liquid-permeable sheet. In FIGS. 2 to 5, the planar shape of the opening 52 is circular, but is not limited thereto. Various known shapes such as an ellipse and a rectangular shape can be used. In FIGS. 2 to 5, the openings 52 are formed uniformly over substantially the entire upper sheet 50 a, but the present invention is not limited to this. In addition, since it is possible to reduce the feeling of close contact with the skin by forming such an opening 52, it is preferable that the hole 52 is formed at least at a part where the skin of the wearer is in contact, for example, the buttock, More preferably, the upper sheet 50a is formed on substantially the entire surface.

  The shape of the opening is not particularly limited, but is preferably a circle or an ellipse. When the size of the opening is circular, the diameter (maximum diameter) on the upper surface side is preferably in the range of 1 to 10 mm. In the case of an ellipse, the minor axis is preferably 1 to 5 mm and the major axis is preferably 3 to 10 mm. By comprising in this way, a skin contact sheet does not contact skin on the whole surface, and permeation | transmission of sweat and urine is performed favorably. For example, if the size of the opening is too small, the contact area on the side in contact with the skin increases, and the wearing feeling may deteriorate. On the other hand, if the size of the opening is too large, the top sheet is exposed and often comes into contact with the wearer's skin, so comfort may be reduced.

  In addition, in the disposable diaper of 1st embodiment, although the total area of the opening in the upper surface side of the porous sheet which comprises an upper sheet is in the range of 30 to 70% with respect to the total area of a porous sheet. The total area of the porous sheet is preferably in the range of 40 to 70%, more preferably in the range of 50 to 70%. By comprising in this way, a wearer's wearing feeling can be improved more.

  The “total area of the openings on the upper surface side of the porous sheet” should be confirmed from the direction perpendicular to the plane when the porous sheet is placed on a plane with the upper surface side of the porous sheet facing up. This is the total area of the holes that can be formed. Further, the “total area of the porous sheet” is the area of the entire sheet (the area of the upper surface) including the area where the openings of the porous sheet placed on the plane are formed. In addition, the ratio of the area of this opening shows the ratio in the area | region in which the opening part for feces passage is not formed.

Moreover, disposable diapers smell of the first embodiment, opening area _{S a1} on the upper surface side of the porous sheet, Ri 1.5-5 Baidea aperture area _{S a2} of the lower surface side, 2 More preferably, it is 4.5 times. By comprising in this way, while a wearer's wearing feeling can be improved more, the tactile feeling (dryness) which the surface of the skin contact sheet was maintained can be maintained.

Note that “the area S _a1 of the opening on the upper surface side of the porous sheet” refers to the area of the opening portion located on the uppermost surface side of the porous sheet, and “the area S _a2 of the opening on the lower surface side of the porous sheet”. Is the area of the opening located on the lowermost surface side of the porous sheet. For example, when the opening protrudes to the lower surface side of the porous sheet and the opening portion of the opening is located below the lower surface of the sheet-like substrate, the area S of the opening on the lower surface side of the porous sheet _a2 is the area of the opening at a position protruding from the lower surface of the substrate.

  The porous sheet 60 shown in FIG. 2 to FIG. 6 is formed so that the peripheral edge portion where the opening 52 of the base material is formed protrudes toward the lower surface side of the base material so that the area of each opening 52 gradually decreases. It has been done. For this reason, the upper sheet 50a shown in FIGS. 2 to 6 is configured such that the depth of the opening 52 (the distance from the upper surface side to the lower surface side of the opening 52) is longer than the thickness of the base material itself. ing.

In addition, in the disposable diaper of 1st embodiment, as shown to FIGS. 12-14, for example, as shown to FIGS. A frustum-shaped opening 52 having a gradually decreasing area may be formed. Such an upper sheet 50a (perforated sheet 60) is very easy to form the opening 52, and can be easily manufactured. 14, the area S _a3 on the upper surface side 61 of the porous sheet 60 is larger than the area S _a4 on the lower surface side 62, and from the upper surface side 61 to the lower surface side 62 of the porous sheet 60, respectively. The area of the opening 52 is formed so as to gradually decrease.

  Here, FIG. 12 is a schematic cross-sectional view in which another example of the disposable diaper of the first embodiment of the present invention is cut along a cross section similar to the cross-sectional view shown in FIG. 3, and FIG. FIG. 14 is a schematic cross-sectional view of another example of the disposable diaper of the first embodiment cut along a cross section similar to the cross-sectional view shown in FIG. 5, and FIG. 14 constitutes the skin contact sheet of the disposable diaper shown in FIG. It is a partially enlarged view of the upper sheet. 12-14, about the thing comprised similarly to each element of the disposable diaper shown in FIGS. 1-5, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As described above, the porous sheet used in the disposable diaper of the first embodiment can be opened if the openings are formed so that the area of each opening gradually decreases from the upper surface side to the lower surface side. There is no restriction | limiting in particular about the shape of a hole. For example, examples of the shape of the hole include a truncated cone shape, a reverse bell shape, and a morning glory shape.

  Further, the area of the opening may be gradually reduced in at least a part of the thickness direction of the porous sheet, and the area of the opening may be constant in other parts.

As the base material constituting the porous sheet, Ru using a liquid impermeable sheet or water repellent sheet. By using such a sheet, once the urine and soft stool that have passed through the skin contact sheet and led to the top sheet ooze out from the skin contact sheet and adhere to the wearer's skin (so-called “urine return, This is preferable because it is possible to effectively prevent the flight return "). Among them, it is preferable to use a water-repellent sheet that can maintain a light touch (dryness) even when worn for a long time, as well as being able to reduce liquid permeability, and has excellent breathability. It is more preferable to use a water-repellent nonwoven sheet having a good touch.

  Examples of the liquid-impermeable sheet include a liquid-impermeable film made of a resin such as polyethylene used as a constituent material for a disposable diaper back sheet.

  As the water-repellent sheet, a nonwoven fabric such as a spunbond nonwoven fabric or a card embossed nonwoven fabric may be used. It is preferable to use a nonwoven fabric such as a melt blown / spun bond nonwoven fabric.

  In addition, in the disposable diaper of 1st embodiment, it is preferable that such a porous sheet is what formed the hole in the nonwoven fabric which consists of thermoplastic resins. By comprising in this way, it is excellent in the processability of a hole, and cheap and stable quality can be obtained.

  Moreover, as shown in FIGS. 7-10, the upper sheet | seat of the disposable diaper of 2nd embodiment is the opening part for a stool passage in the uneven | corrugated sheet | seat 80 in which the several recessed part 72 by the unevenness | corrugation was formed in the surface of a base material. 54 is formed. Although FIGS. 7 to 10 show an example in which the concave portion 72 is formed on the entire upper surface of the upper sheet 70a, the present invention is not limited to this. In the second embodiment, the skin contact sheet (upper sheet) at the time of wearing is preferably formed with at least a depression in the heel portion where the force from the wearer is easily applied, and the entire upper surface of the concavo-convex sheet. More preferably, a depression is formed.

  As such a concavo-convex sheet, for example, it can be formed by forming a web made of short fibers made of synthetic resin and embossing it, or by water jet processing. As a specific method, a method in which a web is passed between a pair of rolls composed of a convex roll and a plain roll, and a depression is formed on the sheet surface by heating and pressurization can be mentioned.

  In addition, in the disposable diaper 100 shown in FIGS. 7 to 10, an example is shown in which a concave recess is formed on the upper surface of the upper sheet 70 a (uneven sheet 80), and a recess 72 is formed by this recess. For example, concave dents and convex protrusions may be alternately formed to form dents, or convex protrusions may be formed on the upper surface, and relative positions may be determined by portions other than the protrusions. A depression may be formed. 7-10, although the unevenness | corrugation is formed only in the upper surface side of the upper sheet 70a (unevenness | corrugation sheet | seat 80), the unevenness | corrugation may be formed in both surfaces of a sheet | seat, for example.

  In addition, in the disposable diaper of 2nd embodiment, it is preferable that such an uneven sheet | seat is what formed the hollow part in the nonwoven fabric which consists of thermoplastic resins. Examples of such a non-woven fabric include a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, and nylon and subjected to a hydrophilic treatment. By comprising in this way, the processability of an unevenness | corrugation is excellent, and cheap and stable quality can be obtained.

  In addition, in the disposable diaper of 2nd embodiment, although the total area of the hollow part in the upper surface side of an uneven | corrugated sheet exists in the range of 30 to 70% with respect to the total area of an uneven | corrugated sheet, It is preferably within the range of 40 to 70%, more preferably within the range of 50 to 70% with respect to the area. By comprising in this way, a wearer's wearing feeling can be improved more. In addition, the ratio of the area of this hollow part shows the ratio in the area | region in which the opening part for feces passage is not formed.

In the disposable diaper according to the second embodiment, as shown in FIG. 11, the total area S _b1 of the depression 72 on the upper surface side of the concavo-convex sheet 80 is the depth of the depression at the intermediate position of the depression 72. Ri 1.2 to 4 Baidea the total area _{S b2,} and more preferably 1.5 to 3.5 times. By comprising in this way, the touched feeling (dryness) of the surface of the skin contact sheet can be maintained.

[1-1b] Liner sheet:
The liner sheet is a sheet material disposed on the lower surface of the upper sheet, and the skin contact sheet of the disposable diaper of the present invention has a laminated structure in which the upper sheet and the liner sheet are laminated. With this configuration, it is possible to place an opening stretchable material, which will be described later, between the two sheet materials (upper sheet and liner sheet), and the skin contact sheet can be stretched with the minimum necessary stretchable material. This is preferable because an effect that force can be applied is achieved.

  For example, in the pants-type disposable diaper 1 shown in FIGS. 2 to 5, the skin contact sheet 50 is composed of two sheet materials, an upper sheet 50 a and a liner sheet 50 b, and the opening stretchable material 30 is between the layers. It is an example arrange | positioned so that it may be pinched | interposed. In the illustrated example, the upper sheet 50a and the liner sheet 50b are formed in the same shape, and one sheet material is completely overlapped with the other sheet material. If the portion where the stretchable material is disposed is a laminated sheet, the opening stretchable material can be disposed between the layers.

A liquid-permeable sheet is used as the sheet material constituting the liner sheet. Specifically, a woven fabric, a nonwoven fabric, a porous film, etc. can be mentioned. In the present invention, polypropylene, polyethylene, polyester, Ru used after subjected to a hydrophilic treatment to a nonwoven fabric made of thermoplastic resin such as nylon.

[1-1c] Stool passage opening:
The sheet material constituting the skin contact sheet needs to have an opening for passing stool that can pass the stool excreted by the wearer. By adopting such a structure, the feces excreted by the wearer pass through the skin contact sheet and fall onto the top sheet, greatly reducing the chance of direct contact between the feces and the wearer's skin. It becomes possible.

  As long as the feces passage opening has a shape capable of passing feces, the shape is not particularly limited. That is, the "opening" through which stool can pass includes a so-called opening (hole) such as a circular opening, an oval opening, a rhombus opening, a linear slit, a cross-shaped slit, and three or more slits Also included are slits such as star-shaped slits that intersect. Among these, an elliptical opening or a star-shaped slit whose longitudinal direction is the longitudinal direction (longitudinal direction) of the diaper is preferable. The oval opening has the advantage that the stool is easy to pass through the opening of the skin contact sheet, and the star-shaped slit has the stool once passing through the opening of the skin contact sheet and falling on the top sheet. There is an advantage that it is possible to effectively prevent the skin contact sheet from being exposed again and contaminating the wearer's buttocks.

  For example, the disposable diaper 1 shown in FIG. 2 has an elliptical stool passing opening that is long in the front-rear direction of the diaper as a stool passing opening 54 in a portion corresponding to the crotch part 4 of the diaper of the skin contact sheet 50. This is an example of formation. The size of the hole or slit may be appropriately determined in consideration of the function of “passing stool”.

  The skin contact sheet may have a urine passage opening on the front body side of the stool passage opening. That is, the skin contact sheet is preferably formed with two openings, a fecal passage opening and a urine passage opening.

  By forming the urine passage opening as described above, the urine excreted by the wearer through the urine passage opening can be reliably introduced into the space between the skin contact sheet and the top sheet. Thus, it is possible to effectively prevent a situation in which urine diffuses through the skin contact sheet and a side leak occurs from the opening around the leg of the diaper. For example, the disposable diaper 1 shown in FIG. 2 is an example in which an elliptical urine passage opening 56 that is long in the front-rear direction of the diaper is further formed in addition to the elliptical stool passage opening 54. In the illustrated example, the stool passage opening 54 is formed in a portion corresponding to the crotch portion 4 of the diaper, and the urine passage opening 56 is formed in a portion closer to the front body 2 than the stool passage opening 54. Yes.

  When the two openings (stool passage opening and urine passage opening) are formed as described above, the space between the skin contact sheet and the top sheet communicates with the stool passage opening. It is preferable to provide a separation wall that divides into a space that communicates with the urine passage opening and a space that communicates with the urine passage opening.

  When urine and feces are mixed, ammonia is generated. This ammonia makes the environment alkaline, and the enzymes in the stool are strongly activated in an alkaline atmosphere. The weakened areas of the skin are inflamed by this enzyme and ammonia, causing diaper rash. Has been reported to occur (Kazuya Yamamoto, Dermatology 30, 949-956 (1998)). By providing the separation wall as described above, it becomes possible to absorb and hold the urine excreted by the wearer in a state separated from the stool, so that the urine and the stool are hardly mixed, and diaper rash is effectively prevented. can do.

  It is preferable to arrange an elastic material (opening elastic material) on the outer edge of the fecal passage opening or the urine passage opening (hereinafter sometimes simply referred to as an opening). When the opening stretchable material is disposed, tension is applied to the skin contact sheet, so that the skin contact sheet can be firm. Therefore, it is possible to prevent the skin contact sheet from falling to the top sheet side, and there is an advantage that the skin contact sheet can easily come into contact with the wearer's skin. Further, when the opening stretchable material is disposed, the skin contact sheet is contracted, and the top sheet, the absorbent body, and the back sheet can act to bend downward (exterior member side). Therefore, the skin contact sheet can be kept floating from the top sheet, and the skin contact sheet and the top sheet can be reliably separated from each other.

  As the opening stretchable material, stretchable materials that have been used in conventional disposable diapers can be suitably used. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc., as well as thread rubber and flat rubber made of elastic materials such as natural rubber and synthetic rubber (urethane rubber, etc.). .

  The arrangement pattern of the opening stretchable material is not particularly limited as long as it is a pattern that can exert the above-described effect, but the opening stretchable material surrounds the periphery of the opening in order to make the stretching force act reliably on the opening. It is preferable to arrange in a pattern. For example, the opening stretchable material may be arranged in a pattern such as a circle, an ellipse, or a rhombus so as to surround the periphery of the opening.

  Also, a pattern in which two opening elastic members are used as the opening elastic members, and the two opening elastic members intersect at at least one point before and after the opening and surround a part of the periphery of the opening. It is also one of the preferable forms that it is arrange | positioned. When the opening stretchable material is arranged in such a pattern, it is possible to continuously arrange the opening stretchable material in the front-rear direction of the diaper, so that it is easy to continuously manufacture disposable diapers. Is preferable.

  For example, the disposable diaper 1 shown in FIG. 2 uses two opening elastic members 30a and 30b as the opening elastic members 30, and the two opening elastic members 30a and 30b are the feces passage opening 54 and the urine. This is an example in which the crossing is made at a point P between the passage openings 56 and the stool passage openings 54 and the urine passage openings 56 are partly surrounded by a pattern. When the opening elastic members 30a and 30b are arranged in such a pattern, it is possible to easily manufacture an absorbent main body continuous body in which the absorbent main body 14 is continuously arranged in the longitudinal direction.

  In addition, the disposable diaper 1 shown in FIG. 2 is arranged such that the opening elastic members 30 a and 30 b intersect at the center of the crotch part 4. By adopting such an arrangement, it is possible to exert a greater stretching force in the width direction (diaper left-right direction) in the crotch part 4 (that is, in the vicinity of the point P) than in the front body 2 side and the back body 6 side of the diaper. it can. Therefore, the skin contact sheet 50 has an effect of making the portion between the stool passage opening 54 and the urine passage opening 56 relatively easy to be loosened more closely to the skin of the wearer.

  The arrangement method of the opening stretchable material is not particularly limited. For example, it is preferable that the opening stretchable material is sandwiched between the upper sheet and the liner sheet constituting the skin contact sheet. Employing such an arrangement method is preferable because the skin contact sheet can be stretched with the minimum necessary stretch material.

  The opening stretchable material is fixed to the skin contact sheet by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

  The opening stretchable material is preferably fixed in an expanded state in order to cause a sufficient stretching force to act on the opening. For example, when the opening stretchable material is natural rubber or synthetic rubber, it is preferably fixed in an extended state of 150 to 400%, and more preferably fixed in an extended state of 200 to 300%. By fixing in the extended state in such a range, it is possible to cause a sufficient stretching force to act on the opening and to prevent the opening from being reduced more than necessary.

[1-2] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  Examples of the absorbent material constituting the absorbent body include disposable diapers and other absorbent articles, for example, conventionally known absorbent materials usually used for disposable diapers, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; Hereinafter, it is referred to as “SAP”), a hydrophilic sheet, and the like. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Especially, what used together about 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp.

  It is preferable that the absorber is interposed at least in part between the top sheet and the back sheet. Usually, the absorber is interposed between the top sheet and the back sheet by being sandwiched between the top sheet and the back sheet and sealing the peripheral edge thereof. Therefore, the flap part in which the absorber is not interposed is formed between the top sheet and the back sheet at the peripheral part of the absorber.

  It is preferable that the absorber is entirely wrapped with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  Although there is no restriction | limiting in particular about the shape of an absorber, The shape used in the conventional disposable diaper and other absorbent articles, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned.

[1-3] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the upper surface (surface located in a wearer's skin side at the time of mounting | wearing of a diaper) may be coat | covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the lower surface side needs to absorb the wearer's urine.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among these, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and subjected to a hydrophilic treatment.

  The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials. For example, in a tape-type diaper described later, a top sheet (center sheet) made of a liquid-permeable material is disposed at the center of the diaper, and a top sheet (side sheet) made of a water-repellent material is disposed on the side flap portion of the diaper. A form of arranging is often used.

[1-4] Backsheet:
A back seat | sheet is a sheet | seat arrange | positioned so that the lower surface (surface located in a wearer's clothing side at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Note that a sheet material (cover sheet) may be bonded to the outer surface of the back sheet. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[1-5] Absorbent body:
In the two-piece type pants-type diaper, the top sheet, the back sheet, and the absorbent body are configured as one member called an “absorbent body” that is responsible for absorption and holding functions, and an exterior member that is manufactured separately. A disposable diaper is formed by joining. Like the sanitary napkin, this absorbent main body has a top sheet on the upper surface side of the absorbent body and a back sheet on the lower surface side. The absorbent body is interposed between the top sheet and the back sheet. It has a structured. In the disposable diaper of the present invention, for example, like the absorbent main body 14 of the disposable diaper 1 shown in FIG. 3, the absorbent body 22 is sandwiched between the top sheet 18 and the back sheet 20, and the peripheral portion of the absorbent body 22 is sealed. By doing so, an absorbent main body having a structure in which the absorber 22 is interposed between the top sheet 18 and the back sheet 20 is provided.

  An absorptive main body is comprised by the size which covers at least the crotch part of a diaper. However, in order to ensure the effect of preventing leakage, it is preferable to have a size that covers not only the crotch part but also a part of the front body and the back body. The absorptive main body can be fixed to the exterior member using, for example, a hot melt adhesive or the like.

[1-6] Exterior member:
The exterior member is a member having a mounting function for encapsulating the wearer's body, and specifically, is a sheet-like member that forms the front body, the crotch portion, and the back body.

  In the two-piece type pants-type diaper, the absorbent main body serves exclusively for the absorption / holding function of absorbing and holding the excrement of the wearer, so a liquid-impermeable material as a material constituting the exterior member There is no need to use. Examples of the material constituting the exterior member include a nonwoven fabric composed of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins.

  And in order to fix an exterior member in the state which pinched | interposed the elastic material etc. around the leg, it is often configured by bonding two or more nonwoven fabrics together. For example, in the disposable diaper 1 shown in FIGS. 2 to 5, the exterior member 16 is composed of two nonwoven fabrics, and the leg elastic members 40, the waist elastic material 42, and the belly elastic materials between the two nonwoven fabrics. This is an example in which 44 is sandwiched and fixed.

[1-7] Solid gather:
The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming this three-dimensional gather, urine is excreted on the skin contact sheet, and even if urine diffuses along the skin contact sheet, the three-dimensional gather becomes a breakwater, and from the opening around the leg of the diaper, etc. Leakage (so-called “lateral leakage”) can be effectively prevented.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, it is possible to suitably use a material in which a stretchable material (a three-dimensional gathered stretchable material) is arranged on a part of the sheet material, and a gather is formed on the sheet material by the three-dimensional gathered stretchable material.

  As the sheet material constituting the three-dimensional gather, a water-repellent material is used from the viewpoint of improving the leak-proof property of the three-dimensional gather. Non-woven fabrics such as spunbond and card embossing may be used as the water-repellent material, but SMS (spunbond / meltblown / spunbond) and SMMS (spunbond / meltblown / meltblown / spun) are used because of their high water pressure resistance. It is preferable to use a non-woven fabric such as a bond.

  The three-dimensional gather can be formed by folding back the top sheet or back sheet of the absorbent main body. However, it is more preferable that the three-dimensional gather is formed by sticking a sheet material completely different from the top sheet, the back sheet, and the like.

  The three-dimensional gather is preferably formed on both sides of the skin contact sheet for the purpose of preventing side leakage of urine. Especially, it is preferable that it forms along the both-sides edge part of a skin contact sheet. By doing this, even when urine is excreted on the skin contact sheet and the urine diffuses through the skin contact sheet, the three-dimensional gather surely functions as a breakwater, and from the openings around the legs. Side leakage can be effectively prevented.

  For example, in the case of the disposable diaper 1 shown in FIGS. 2 to 5, the skin contact sheet 50 is disposed up to both side edges of the absorbent main body 14, and the three-dimensional gathers 26 a and 26 b are connected to both side edges of the skin contact sheet 50. That is, it is an example formed along both side edges of the absorbent main body 14. The disposable diaper 1 shown in FIGS. 2 to 5 is an example in which the three-dimensional gathers 26a and 26b are formed over the entire side edges of the absorbent main body 14, but at least a diaper for the purpose of preventing side leakage of urine. What is necessary is just to be arrange | positioned in the part corresponded to crotch part.

  In the disposable diaper, at least a pair of three-dimensional gathers are preferably formed, but two or more pairs may be formed.

[1-8] Various elastic materials:
In a pants-type disposable diaper, it is common to arrange an elastic material around the legs, arrange an elastic material around the waist, and more preferably arrange an elastic material around the abdomen.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented.

  The waist elastic material is an elastic material arranged along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, preventing urine leakage from around the waist, and improving the fit of the diaper to the wearer, thereby preventing the diaper from falling down.

  An abdominal circumference elastic material is an elastic material arrange | positioned in the part (namely, part equivalent to a wearer's abdominal circumference) between a waist circumference opening part and a leg circumference opening part. By arranging the elastic material around the abdomen, it is possible to form a highly elastic tammy gather around the abdomen of the wearer. This Tammy Gather, together with West Gather, can make the diaper fit and anti-slip effect even better.

  In the disposable diaper 1 shown in FIG. 1 and FIG. 2, a plurality of leg-surrounding elastic members 40 are arranged on the periphery of the leg-surrounding opening, and the waist-surrounding opening surrounds the waist-surrounding opening. A plurality of waist elastic members 42 are arranged, and a portion between the waist opening and the leg opening (that is, a portion corresponding to the wearer's belly) is arranged around the wearer's belly. This is an example in which a plurality of belly elastic members 44 are arranged so as to surround them.

  About these elastic materials, the structure similar to the opening part elastic material already described is employable. Then, after considering the degree of gather contraction and the like, the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

[2] Manufacturing method:
Hereinafter, an example of the method of manufacturing the disposable diaper of the present invention will be described with reference to an example of manufacturing the disposable diaper 1 (two-piece type pants-type diaper) shown in FIGS.

[2-1] Production of absorbent main body:
An absorber 22 wrapped in a hydrophilic sheet is disposed on the upper surface of the back sheet 20, and a top sheet 18 is disposed on the upper surface. Next, the absorbent main body 14 is obtained by sealing the periphery of the absorbent body 22 so as to be sandwiched between the top sheet 18 and the back sheet 20.

[2-2] Production of solid gathers:
One end of the sheet material 32a (32b) is folded, and the three-dimensional gathers 26a (26b) are bonded together by sandwiching the two three-dimensional gather elastic members 36a, 36b (36c, 36d) between the folded portions. Get.

[2-3] Production of skin contact sheet:
The upper sheet 50a is bonded to the upper surface of the liner sheet 50b while arranging the two opening stretchable members 30a and 30b in a predetermined pattern. At this time, the two opening elastic members 30a and 30b intersect at a point P between the feces passage opening 54 and the urine passage opening 56 to be formed later, and the feces passage opening 54 and the urine passage It arrange | positions in the pattern which surrounds a part of periphery of the opening part 56 for an object.

  When manufacturing the disposable diaper 1 of the first embodiment, a porous sheet 60 in which a plurality of apertures 52 are formed in a base material is used as the above-described upper sheet 50a. As this porous sheet, the area of the opening on the upper surface side of the porous sheet is larger than the area on the lower surface side, and the area of each opening gradually decreases from the upper surface side to the lower surface side of the porous sheet. It is assumed that the total area of the openings on the upper surface side of the porous sheet is within a range of 30 to 70% with respect to the total area of the porous sheet.

  In addition, when manufacturing the disposable diaper of 2nd embodiment, the uneven | corrugated sheet | seat in which the several hollow part by the unevenness | corrugation was formed in the surface of a base material is used as an upper sheet | seat.

  Next, the stool passage opening 54 and the urine passage opening 56 are formed in the bonded liner sheet 50b and upper sheet 50a. By doing so, the two opening elastic members 30a and 30b intersect at a point P between the fecal passage opening 54 and the urine passage opening 56, and the fecal passage opening 54 and the urine passage opening. A skin contact sheet 50 having a two-layer structure arranged in a pattern surrounding a part of the peripheral edge of 56 is obtained.

[2-4] Attaching skin contact sheet etc. to absorbent main body:
After the skin contact sheet 50 is bonded to the surface of the top sheet 18 constituting the absorbent main body 14, the three-dimensional gathers 26 a and 26 b are bonded so as to sandwich the side edges of the absorbent main body 14 and the skin contact sheet 50.

[2-5] Production of exterior member:
First, two nonwoven fabrics to be the exterior member 16 are prepared, and a waist elastic member 42, an abdominal elastic member 44, and a leg elastic member 40 are disposed on and bonded to the upper surface of one of the nonwoven fabrics. And by laminating and fixing another nonwoven fabric on the upper surface, the waist elastic member 42, the belly elastic member 44 and the leg elastic member 40 are interposed between the two nonwoven materials. The exterior member 16 is obtained.

[2-6] Manufacture of disposable diapers:
The absorbent main body 14 is disposed and fixed near the crotch part of the exterior member 16. Next, the absorbent body 14 is turned inside, and the front body 2 and the back body 6 are folded in two so that the front body 2 and the back body 6 are matched, and the front body 2 and the back body 6 are joined by means such as heat sealing to form the joint 8. By doing so, the disposable diaper 1 shown in FIG. 1 can be manufactured.

  The series of steps as described above can be continuously performed by mechanical means. For example, by adopting a method / apparatus such as continuously feeding a long sheet material or stretchable material from a roller, it becomes possible to continuously manufacture disposable diapers, which contributes to an improvement in productivity.

[3] Application target of the present invention:
The application object of the disposable diaper of this invention is not restricted to the said 2 piece type underpants type diaper, For example, it can apply also to a 1 piece type underpants type diaper and a tape type diaper. That is, as long as the skin contact sheet using the upper sheet in which a hole having a specific shape or a recess is formed, the effect of the disposable diaper of the present invention can be enjoyed.

  “One-piece type” includes a top sheet, a back sheet, and an absorber as in the case of the two-piece type. However, the absorber that performs absorption and holding functions is interposed between the top sheet and the back sheet. This means a diaper of a type that is (built-in) and configured integrally with a top sheet and / or a back sheet that has a mounting function.

  The “tape-type diaper” includes a top sheet, a back sheet, an absorber interposed in at least a part between the two sheets, and a tape fastener for wearing. It shall mean a disposable diaper that can fix the back and back parts to each other. “Tape-type diapers” also have “1-piece type” and “2-piece type” as in pants-type diapers, but the disposable diaper of the present invention is applicable to any type of tape-type diaper.

  The disposable diaper of the present invention can be suitably used as a disposable diaper for infants or adults such as elderly people and persons with disabilities who need care.

It is a figure which shows the state which looked at 1st embodiment of the disposable diaper of this invention from the front. It is a top view which expands the 1st embodiment of the disposable diaper of this invention, and shows the state seen from the absorptive main body side of the diaper. It is a schematic sectional drawing of 1st embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 2 along the A-A 'line. It is a schematic sectional drawing of 1st embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 2 along the B-B 'line. It is a schematic sectional drawing of 1st embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 2 along the C-C 'line. It is a partially expanded view of the upper sheet constituting the skin contact sheet of the disposable diaper shown in FIG. It is a top view which expands 2nd embodiment of the disposable diaper of this invention, and shows the state seen from the absorptive main body side of the diaper. It is a schematic sectional drawing of 2nd embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 7 along the D-D 'line. It is a schematic sectional drawing of 2nd embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 7 along the E-E 'line. It is a schematic sectional drawing of 2nd embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 7 along the F-F 'line. It is a partial enlarged view of the upper sheet which comprises the skin contact sheet of the disposable diaper shown in FIG. It is the schematic sectional drawing which cut | disconnected other examples of the disposable diaper of 1st embodiment of this invention by the cross section similar to sectional drawing shown in FIG. It is the schematic sectional drawing which cut | disconnected other examples of the disposable diaper of 1st embodiment of this invention by the cross section similar to sectional drawing shown in FIG. It is a partial enlarged view of the upper sheet which comprises the skin contact sheet of the disposable diaper shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100: Disposable diaper, 2: Front body, 4: Crotch part, 6: Back body, 14: Absorbent main body, 16: Exterior member, 18: Top sheet, 20: Back sheet, 22: Absorber, 26, 26a, 26b: Three-dimensional gather, 30, 30a, 30b: Opening and contracting elastic material, 32, 32a, 32b: Sheet material, 36, 36a, 36b, 36c, 36d: Three-dimensional gathering elastic material, 40: Leg elastic material, 42 : Elastic material around waist, 44: elastic material around waist, 50: skin contact sheet, 50a: upper sheet, 50b: liner sheet, 52: opening, 54: opening for passing stool, 56: opening for passing urine, 60: porous sheet, 61: upper surface side (upper surface side of porous sheet), 62: lower surface side (lower surface side of porous sheet), 70: skin contact sheet, 70a: upper sheet, 70b: Inert sheet, 72: recess, 80: uneven sheet, 81: upper surface side (upper surface side of the concave-convex sheet), 82: lower side (lower surface side of the concave-convex _{sheet), S a1, S a2,} S a3, S a4: area (Area of opening), S _b1 , S _b2 : Area (area of the depression).

Claims (6)

An absorber, a top sheet that is arranged so as to cover the upper surface of the absorber, and at least a part that is made of a liquid-permeable material, and a surface that covers the lower surface of the absorber, and is made of a liquid-impermeable material With a backsheet
Further comprising a skin contact sheet disposed above the top sheet and formed with a fecal passage opening through which feces can pass;
The skin contact sheet has a laminated structure in which an upper sheet arranged on the wearer side and a liner sheet arranged on the lower surface of the upper sheet are laminated,
The upper sheet is a liquid-impermeable sheet or a water-repellent sheet as a base material in which a plurality of apertures are formed and the stool passage opening is formed, and the liner sheet is The stool passage opening is formed in a sheet subjected to a hydrophilic treatment on a nonwoven fabric made of a thermoplastic resin,
The plurality of apertures are such that the area on the upper surface side of the porous sheet is larger than the area on the lower surface side, and the area of each of the apertures gradually decreases from the upper surface side to the lower surface side of the porous sheet. Formed in the
The total area of the apertures in the upper surface of the porous sheet, the total area of the perforated sheet state, and are in the range of 30% to 70%, and the area of the apertures in the upper surface of the perforated sheet the porous area of the apertures in the lower surface of the sheet, 1.5-5 Baidea Ru disposable diapers.   The perforated sheet is formed such that a peripheral edge portion of the base material in which the opening is formed protrudes toward the lower surface side of the base material so that the area of each opening is gradually reduced. The disposable diaper according to claim 1. An absorber, a top sheet that is arranged so as to cover the upper surface of the absorber, and at least a part that is made of a liquid-permeable material, and a surface that covers the lower surface of the absorber, and is made of a liquid-impermeable material With a backsheet
Further comprising a skin contact sheet disposed above the top sheet and formed with a fecal passage opening through which feces can pass;
The skin contact sheet has a laminated structure in which an upper sheet arranged on the wearer side and a liner sheet arranged on the lower surface of the upper sheet are laminated,
The upper sheet is a concavo-convex sheet in which a plurality of depressions due to concavo-convex portions are formed on the surface of a base material, and the stool passage opening is formed, and the liner sheet is a nonwoven fabric made of a thermoplastic resin. The stool passage opening is formed on a sheet subjected to a hydrophilic treatment,
The depression is configured such that the total area of the depression decreases gradually from the upper surface side to the lower surface side of the uneven sheet,
The total area of the recess in the upper surface of the uneven sheet, the total area of the concavo-convex sheet state, and are in the range of 30% to 70%, the total area of the recess in the upper surface of the uneven sheet , 1.2 to 4-fold range in der Ru disposable diaper of the total area of the recessed portion at an intermediate position of the depth of the recess portion. The disposable diaper according to claim 3 , wherein the concavo-convex sheet is a nonwoven fabric made of a thermoplastic resin and the depression is formed. The at least one pair of opening stretchable members disposed along the outer edge of the stool passing opening is attached between the upper sheet and the liner sheet constituting the skin contact sheet. the disposable diaper according to any one of 1-4. The disposable diaper according to any one of claims 1 to 5 , wherein at least a pair of three-dimensional gathers, which are three-dimensionally standing leak-proof walls, are formed on both sides of the skin contact sheet.

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