JP4627502B2 - Disposable diapers - Google Patents

Description

  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 on top of 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.

  Therefore, a disposable diaper has been proposed in which another sheet body (hereinafter referred to as “skin contact sheet”) is disposed on the top of 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.

  In these disposable diapers, since the skin contact sheet first comes into contact with the skin of the wearer, the top sheet disposed at the lower part of 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 stool remains on the top sheet, it is possible to expect the effect of greatly reducing the chance that the stool and the skin of the wearer are in direct contact.

  By the way, when urine and stool are mixed, ammonia is generated, this ammonia makes the environment alkaline, the enzyme in the stool is strongly activated in an alkaline atmosphere, and the weak part of the skin is inflamed by this enzyme and ammonia, It has been reported that diaper rash occurs (for example, see Non-Patent Document 1).

  Therefore, in the disposable diaper described in Patent Document 2, a weir is formed on the crotch part of the diaper with a top sheet or an absorbent body, or the thickness of the absorbent body is reduced from the crotch part to the back body side of the diaper, thereby reducing the pocket part. Etc. are added.

Utility Model Registration No. 2559050 (paragraph 0010, FIG. 2) JP 2002-11044 A (paragraphs 0044 to 0046, FIGS. 10 to 12) Kazuya Yamamoto, Dermatology 30, p. 949-956 (1998)

  In the disposable diaper described in Patent Document 2, movement of the urine to the back body side and movement of the stool to the front body side are suppressed by the weir formed in the crotch part of the diaper. Moreover, the movement to the front body side of the stool is suppressed by the pocket part formed from the crotch part of the diaper to the back body side. Therefore, the urine excreted by the wearer and the stool are hardly mixed, and an effect of reducing diaper rash can be expected.

  However, although the disposable diaper described in Patent Document 2 can prevent mixing of urine and stool to some extent, the urine and stool excreted by the wearer can be reliably separated and absorbed and retained. There was a problem that urine and stool may be mixed. In other words, the urine and feces excreted by the wearer are surely separated and absorbed and retained, which is not fully satisfactory and still has problems to be solved.

  Thus, at present, a disposable diaper that can effectively prevent the mixing of urine and feces is not disclosed, and such a disposable diaper is desired. The present invention has been made to solve the problems of the prior art, and can reliably separate and absorb and retain the urine and feces excreted by the wearer, and the urine and feces are mixed. Disclosed is a disposable diaper that can effectively prevent the situation of being combined.

  As a result of intensive studies to solve the problems of the prior art as described above, the disposable diaper described in Patent Document 2 has a space above the formed weir. Since the weir is usually formed by a top sheet composed of a liquid-permeable sheet (hydrophilic sheet), the urine penetrates the weir and the back body is moved to the front body side. It has been found that the effect of separating urine and stool tends to be insufficient. Then, it is conceived that the above problem can be solved by forming a stool capturing space for communicating with the stool passage opening and capturing the stool in the space between the skin contact sheet and the top sheet. The present invention has been completed. Specifically, the following disposable diapers are provided by the present invention.

[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 disposable diaper comprising a back sheet made of a functional material, further comprising a skin contact sheet disposed on the top sheet and having an opening (stool passing opening) through which feces can pass; In the space between the skin contact sheet and the top sheet, a stool capturing space is formed that communicates with the stool passage opening and captures the stool, and the stool capturing space is formed of a water repellent material or liquid. A sheet material made of an impermeable material is joined to the outer edge of the stool passage opening on the back side of the skin contact sheet so as to surround the periphery of the stool passage opening. A disposable diaper formed in a bag shape (hereinafter, also referred to as “first invention”).

[2] An absorber, a top sheet that is arranged to cover the upper surface of the absorber, and at least a part that is made of a liquid-permeable material; A disposable diaper comprising a back sheet made of a functional material, further comprising a skin contact sheet disposed on the top sheet and having an opening (stool passing opening) through which feces can pass; In the space between the skin contact sheet and the top sheet, a stool capturing space is formed that communicates with the stool passage opening and captures the stool, and the stool capturing space is formed of a water repellent material or liquid. Each of the end portions of the band-shaped sheet material made of an impermeable material has a back surface of the skin contact sheet at at least two positions on the front body side and the back body side of the outer edge of the feces passage opening. A disposable diaper that is formed into a shape in which at least a part of the side is opened by being joined to the surface side (hereinafter, also referred to as “second invention”).

[ 3 ] The absorber according to [1] or [2] , wherein a concave portion is formed on an upper surface side of the absorber, and the concave portion is disposed in a portion corresponding to a lower side of the stool capturing space. Disposable diapers.

[ 4 ] The disposable diaper according to any one of [1] to [ 3 ], wherein an opening (urine passing opening) through which urine can pass is further formed in the skin contact sheet.

[ 5 ] The corresponding side edges of the front body and the back body are joined together to form one waist opening and a pair of leg openings, and the waist opening and the leg openings. The disposable diaper according to any one of [1] to [ 4 ], further comprising an abdominal circumference stretchable material disposed in a portion between the two.

  The disposable diaper of the present invention can reliably separate and absorb and retain the urine and feces excreted by the wearer, and can effectively prevent the situation where urine and feces are mixed.

  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. Here, FIG. 1 is a schematic perspective view showing one embodiment of the disposable diaper of the present invention, is a schematic perspective view showing a state as viewed from the front of the diaper, and FIG. It is a top view which shows one Embodiment of the disposable diaper of invention, and expand | deploys the disposable diaper shown in FIG. 1, and is a top view which shows the state seen from the absorptive main body side of the diaper. 3 is a schematic cross-sectional view showing a cross section of the disposable diaper shown in FIG. 2 cut along the line X1-X1 ′, and FIG. 4 shows the disposable diaper shown in FIG. 2 along the line YY ′. It is a schematic sectional drawing which shows the cross section cut | disconnected by.

  In the present specification, the term “pants-type diaper” refers to the corresponding side edges of the front body 2 and the back body 6 (side edges 2a, 6a) as in the disposable diaper 1 shown in FIGS. , 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 “two-piece type” means a function (wearing function) in which the absorbent main body 14 responsible for absorbing and holding the excrement of the wearer (absorption / holding function) encapsulates the wearer's body. It shall mean a diaper of the type configured as a separate member separated from the carrying exterior member 16. As shown in FIGS. 3 and 4, the absorbent main body 14 is a member including 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:
The disposable diaper of this invention (1st invention) is a disposable diaper provided with the absorber 22, the top sheet 18, and the back sheet | seat 20, like the disposable diaper 1 shown in FIGS. The skin contact sheet 24 is further provided with an opening (stool passing opening 28a) that is disposed at the top of the sheet 18 and through which feces can pass.

In the disposable diaper 1 of the first invention, a stool capturing space 50 is formed in the space between the skin contact sheet 24 and the top sheet 18 to communicate with the stool passage opening 28a and capture stool. The stool capturing space 50 has a stool passage opening on the back side of the skin contact sheet 24 so that a sheet material 48 made of a water repellent material or a liquid-impermeable material surrounds the periphery of the stool passage opening 28a. It is formed into a bag shape by being joined to the outer edge of 28a.

  Moreover, the disposable diaper 11 of this invention (2nd invention) is similar to the disposable diaper of 1st invention, as shown in FIG.1, FIG.5 and FIG.6, the absorber 22, the top sheet 18, A disposable diaper provided with a back sheet 20, further comprising a skin contact sheet 24 disposed on the top sheet 18 and having an opening (stool passing opening 28 a) through which feces can pass. is there.

In the disposable diaper 11 of the second invention, a stool capturing space 50 is formed in the space between the skin contact sheet 24 and the top sheet 18 to communicate with the stool passage opening 28a and capture stool. The stool catching space 50 has at least two ends of a belt-like sheet material 49 made of a water-repellent material or a liquid-impermeable material on the front body 2 side and the back body 6 side of the outer edge of the stool passage opening 28a. By joining to the back surface side of the skin contact sheet 24 at a location, it is formed into a shape in which at least a part of the side is open. In addition, the disposable diaper 11 of this 2nd invention is the disposable diaper 1 of 1st invention (FIGS. 2-4) except the structure of the stool capture space 50 formed of the above-mentioned strip | belt-shaped sheet | seat material 49 differing. The same constituents as those in (Ref.) Are provided. Here, FIG. 5 is a plan view showing one embodiment of the disposable diaper of the second invention, and is a plan view showing a state in which the disposable diaper shown in FIG. 1 is developed and viewed from the absorbent main body side. FIG. 6 is a schematic cross-sectional view showing a cross section of the disposable diaper shown in FIG. 5 cut along the line X2-X2 ′. In addition, since the schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 5 along the YY 'line is substantially the same as the schematic sectional drawing shown in FIG. 4, it shall refer to FIG.

[1-1] Skin contact sheet:
The skin contact sheet is a member for separating the wearer's skin and the top sheet, and is disposed in the upper part of the top sheet, and is formed in a sheet shape in which an opening through which stool can pass (a stool passing opening) is formed. It is a member. By providing this skin contact sheet, the skin contact sheet first comes into contact with the skin of the wearer, and therefore the top sheet disposed at the lower part of 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.

  As a material constituting the skin contact sheet, for example, a nonwoven fabric made of a resin such as polyethylene, polypropylene, or polyester, a mesh sheet, or a film can be used. Especially, it is preferable to use a nonwoven fabric in the point that the touch is favorable. These materials may be liquid permeable, liquid impermeable, or water repellent. However, a water repellent material (such as a water repellent nonwoven fabric) is preferable in that it can maintain a light touch (dryness) even when worn for a long time.

  The skin contact sheet needs to be formed with an opening (stool passing opening) through which the stool excreted by the wearer can pass. By adopting such a structure, the feces excreted by the wearer pass through the skin contact sheet, communicate with the fecal passage opening, and become a feces capturing space for capturing the feces. Opportunities for direct contact with the wearer's skin can be greatly reduced.

  As long as the opening has a shape that allows stool to pass through, the shape is not particularly limited. That is, the "opening" through which stool can pass includes not only so-called openings (holes) such as circular openings, elliptical openings, rhombus openings, but also linear slits, cross-shaped slits, 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 stool easily passes through the opening of the skin contact sheet, and the star-shaped slit once passes through the opening of the skin contact sheet and is captured in the stool capturing space. However, there is an advantage that it can be effectively prevented from being exposed again from the opening of the skin contact sheet and contaminating the wearer's buttocks. For example, the disposable diaper 1 shown in FIG. 2 has an oval opening having a major axis in the longitudinal direction of the diaper as a stool passing opening 28a in a portion corresponding to the crotch part 4 of the diaper of the skin contact sheet 24. 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 an opening for passing urine on the front body side of the opening. That is, it is preferable that the skin contact sheet is formed with a fecal passage opening and a urine passage opening as openings.

  By forming the urine passage opening as described above, the urine excreted by the wearer through the opening can be surely flowed into the skin contact sheet. It is possible to effectively prevent a situation in which urine diffuses and a side leak occurs from an 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 28b is further formed as an opening 28 in the skin contact sheet 24 in addition to an elliptical stool passage opening 28a. . In this example, the stool passage opening 28a is formed in a portion corresponding to the crotch part 4 of the diaper, and the urine passage opening 28b is formed in a portion closer to the front body 2 than the stool passage opening 28a. .

  It is preferable to arrange a stretchable material (opening stretchable material) on the outer edge of the 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.

  Further, for example, when the stool capturing space is formed in a shape in which at least a part of the side is open like the disposable diaper of the second invention, the side where the sealing material is not disposed. On the side, a gap may be formed between the skin contact sheet or the top sheet and the sheet material, but if the skin contact sheet contracts as described above, the gap can be filled. . Therefore, the sealing property of the stool capturing space can be improved, and the excreted stool can be captured more reliably.

  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 so as 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 stool passage opening 28a and the urine. This is an example in which the crossing is made at a point P between the passage openings 28b and the stool passage openings 28a and the urine passage openings 28b 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 24 has an effect of making the portion between the stool passage opening 28a and the urine passage opening 28b, which are relatively loose, more closely contact the wearer's skin. Further, in the disposable diaper 1 shown in FIG. 2, the opening elastic members 30a and 30b do not intersect except at the center point P of the crotch part 4, and the peripheral edge and urine on the back body 6 side of the feces passage opening 28a It arrange | positions in the pattern by which the peripheral part by the side of the front body 2 of the opening part 28b for opening was open | released. By setting it as such an arrangement | positioning, since the front body 2 side and the back body 6 side of the skin contact sheet 24 do not adhere too much with respect to a wearer's skin, air permeability can be ensured. Therefore, sweating due to the contact of the skin contact sheet is suppressed, and stuffiness and skin trouble caused by sweat can be effectively prevented.

  The opening stretchable material as described above 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 a stretched state of 100 to 400%, and more preferably fixed in a stretched 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.

  The arrangement method of the opening stretchable material is not particularly limited. For example, like the disposable diaper 1 shown in FIG. 3, the skin contact sheet 24 is bonded to two sheet-like members (upper sheet 24a and liner sheet 24b). It is preferable that the opening stretchable members 30a and 30b are sandwiched between the upper sheet 24a and the liner sheet 24b. Employing such an arrangement method is preferable because the skin contact sheet can be stretched with the minimum necessary stretch material.

  The disposable diaper 1 shown in FIGS. 2 and 3 has a shape that covers the entire surface of the top sheet 18 as the skin contact sheet 24. However, the skin contact sheet in the disposable diaper of the present invention (the first invention and the second invention) is not limited to such a sheet body, and is a sheet body disposed above the surface of the top sheet. If there is enough.

  As a fixing method of the skin contact sheet, (1) like the disposable diaper 1 shown in FIG. 3, the three-dimensional gather sheet materials 32a and 32b and the top sheet 18 (or the back sheet 20) constituting the three-dimensional gathers 26a and 26b A method of fixing the skin contact sheet 24 so as to be sandwiched between the two, and (2) a skin contact on the inner surface of the three-dimensional gather between the upper edge and the lower end edge (standing line) of the three-dimensional gather Examples thereof include a method for fixing the sheet. 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 a 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.

[1-2] Stool capture space:
The stool capturing space is a space for capturing stool excreted by the wearer after passing the stool passing opening of the skin contact sheet. As shown in FIGS. 2 to 4, in the disposable diaper 1 according to the first aspect of the present invention, the stool capturing space includes a sheet material 48 made of a water-repellent material or a liquid-impermeable material . It is formed in a bag shape by being joined to the outer edge of the feces passage opening 28a on the back surface side of the skin contact sheet 24 so as to surround the periphery, and as shown in FIGS. In addition, in the disposable diaper 11 of the second invention, the respective end portions of the strip-shaped sheet material 49 made of a water-repellent material or a liquid-impermeable material are connected to the front body 2 side of the outer edge of the feces passage opening 28a and At least two places on the back body 6 side are joined to the back side of the skin contact sheet 24 to form a shape in which at least a part of the side is open.

As a material of the sheet materials 48 and 49 that form the stool capturing space, a space for communicating stool passing and for capturing stool is formed in the space between the skin contact sheet and the top sheet. der what can is, (1) as well as capture the excreted faeces of the wearer, it is preferably made of a material that can be isolated from the excreted urine of the wearer. In addition, as the material of the sheet material, (2) the material has air permeability and is less likely to cause stuffiness in the stool capturing space; (3) excellent in flexibility and shape followability; It is more preferable that the material has a high fit.

For this reason, in the disposable diaper of the present invention, a sheet material made of a water-repellent material or a liquid-impermeable material is used as the sheet material forming the stool capturing space . In the sheet material configured in this way, urine guided onto the front body side top sheet does not permeate the sheet material and ooze out into the stool capturing space. Therefore, mixing of urine and stool can be effectively prevented, and occurrence of diaper rash caused by mixing of urine and stool is effectively suppressed .

  Examples of the sheet material made of the water repellent material include a breathable water repellent sheet. The breathable water-repellent sheet may be made of non-woven fabric such as spunbond or card emboss, but because of its high water pressure resistance, SMS (spunbond / meltblown / spunbond), SMMS (spunbond / meltblown / meltblown / spun) It is preferable to use a non-woven fabric such as a bond.

  Examples of the sheet material made of a liquid-impermeable material 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 impermeable but moisture permeable. There is an advantage.

  The liquid impervious film may be uncomfortable when it comes into contact with sweaty skin, and may cause a rash, so that a film bonded to a nonwoven fabric can be used. The non-woven fabric is used so that it is on the side that contacts the skin.

  For example, the disposable diaper 1 shown in FIG. 2 to FIG. 4 has the stool passage opening 28 a so as to surround the periphery of the stool passage opening 28 a on the lower surface of the liner sheet 24 b constituting the skin contact sheet 24. The outer peripheral part of the sheet | seat material 48 is joined to an outer edge, and the feces capture space 50 is formed in the bag shape. In this example, as shown in FIG. 4, a bag-like stool capturing space 50 is configured by bending the sheet material 48 so as to have respective Z-shaped cross sections on the front body 2 side and the back body 6 side. Yes. With such a configuration, the sheet material 48 can be formed with a wrinkle that can be expanded and contracted in the vertical direction, and therefore the sheet material 48 is less likely to restrain the behavior of the skin contact sheet 24. Therefore, the skin contact sheet 24 can be more closely attached to the wearer's body.

  Moreover, in the disposable diaper 11 of 2nd invention, as shown in FIGS. 4-6, each edge part of the strip | belt-shaped sheet | seat material 49 is the front body 2 side and the back of the outer edge of the feces passage opening part 28a. As shown in FIG. 4, it is joined at at least two locations on the body 6 side, and is folded so as to have a Z-shaped cross section on the front body 2 side and the back body 2 side of the belt-like sheet material 49, thereby capturing the stool. The space 50 is formed in a shape where at least a part of the side is open.

  In the disposable diaper of the second invention, the stool capturing space may be partitioned from the other space between the skin contact sheet and the top sheet on the front body side and the back body side. Does not need to be completely separated. For example, in the disposable diaper 11 shown in FIGS. 5 and 6, there are gaps on the left and right sides of the sheet material 49, and the space 46 communicates with the stool capture space 50 at the gaps on the left and right sides. The stool is captured in the stool capturing space 50 and has an effect of making it difficult to mix the urine excreted by the wearer and the stool. That is, when the diaper is worn, the absorbent body 22 is deformed so as to have a U-shaped cross section. Therefore, practically, feces and urine do not pass through this gap, and usually excreted urine is quickly absorbed. This is because there is almost no possibility that unabsorbed urine passes through the gap and flows into the stool capture space 50 because it is absorbed by the body.

  The stool capturing space 50 is not necessarily formed directly below the stool passing opening 28a as long as it is communicated with the stool passing opening 28a and can capture stool. It is preferable that the stool is formed immediately below the stool passage opening 28a so that the excreted stool can be captured reliably and promptly.

  Further, the sheet material forming the stool capturing space in the disposable diaper of the first invention is joined to the outer edge of the stool passing opening on the back side of the skin contact sheet in the vicinity of the periphery of the stool passing opening. However, for example, if it is possible to form a space (capturing space) for communicating with the stool passage opening and capturing the stool, in a region away from the periphery of the stool passage opening It may be joined to the outer edge of the stool passage opening on the back side of the skin contact sheet. In addition, if the position where the sheet material is joined is too close to the front body side, the urine excreted by the wearer may flow directly into the stool capturing space through the skin contact sheet or the like. The position at which the sheet material is joined is preferably on the back body side with respect to the portion that can contact the perineum of the wearer. By comprising in this way, the inflow of the urine which the wearer excreted can be prevented effectively.

  Moreover, when two openings, a stool passage opening and a urine passage opening, are formed in the skin contact sheet, it is preferable that the stool capture space and the urine passage opening do not communicate with each other. By configuring in this way, the space between the skin contact sheet and the top sheet can be partitioned into a stool capturing space that communicates with the stool passage opening and another space that communicates with the urine passage opening. it can. Thereby, it becomes possible to more reliably separate urine and feces excreted by the wearer.

  Moreover, in the disposable diaper of 1st and 2nd invention, the sheet | seat material and the top sheet may be joined in the site | part which a sheet | seat material and a top sheet contact, and it is not necessary to join. For example, when the sheet material and the top sheet are joined, the sheet material is not displaced, and the shape of the stool capturing space is stabilized. On the other hand, when the sheet material and the top sheet are not joined, the shape of the stool capturing space can be given a degree of freedom, and a comfortable wearing feeling can be obtained.

[1-3] 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 absorber include conventionally known absorbent materials usually used for disposable diapers and other absorbent articles, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter referred to as “SAP”). And a hydrophilic sheet. 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.

  In the disposable diaper of the present invention (the first invention and the second invention), as shown in FIGS. 7 and 8, the absorbent body 22 has a recess 23 formed on the upper surface side, and the recess 23 May be a disposable diaper 1 (11) disposed in a portion corresponding to the lower side of the stool capturing space 50. Here, FIG. 7 is a schematic cross-sectional view showing another embodiment of the disposable diaper of the present invention, and FIG. 8 is a schematic cross-sectional view showing still another embodiment of the disposable diaper of the present invention. 7 and 8 are schematic cross-sectional views showing the same cross section as the disposable diaper shown in FIG. A part of the stool capture space 50 can be disposed at the site where the concave portion 23 of the absorber 22 is formed, and the size of the stool capture space 50 can be effectively ensured. Moreover, since the recessed part 23 of such an absorber 22 becomes a cushion, when stress is applied from the exterior member 16 side of the disposable diaper 1 (11), for example, the stool captured in the stool capturing space 50 is used for passing a stool. It becomes difficult to be pushed back to the opening 28a side. Furthermore, by comprising in this way, it becomes possible to make thickness of the disposable diaper 1 (11) thin, without narrowing the stool capture space 50. FIG.

[1-4] 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. Since the top sheet needs to absorb the wearer's urine in the absorber disposed on the lower surface side thereof, at least a part (the whole or a part thereof) is made of a liquid-permeable material.

  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.

[1-5] 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.

[1-6] 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. For example, in the disposable diaper 1 shown in FIGS. 3 and 4, the top sheet 18 and the back sheet 20 are sealed by sandwiching the absorbent body 22 between the top sheet 18 and the back sheet 20 and sealing the periphery of the absorbent body 22. It is the example which comprised the absorptive main body 14 of the structure where the absorber 22 was interposed in between.

  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.

[1-7] 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. 1 and 2, the exterior member 16 is composed of two nonwoven fabrics, and the leg elastic members 40, the waist elastic members 42, and the belly elastic members between the two nonwoven fabrics. This is an example in which 44 is sandwiched and fixed.

[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 elastics are joined to each other at the side edges of the front and back bodies to form a waist opening and a pair of leg openings. It is the elastic material arrange | positioned in the part between opening parts. 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 disposable diaper of the present embodiment further includes the above-mentioned belly stretchable material, so that the skin contact sheet can be surely pressed against the wearer's crotch, effectively preventing the displacement of the skin contact sheet. The stool can be captured more reliably by the stool capturing space.

  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 FIGS. 1 and 2, a plurality of leg-holes elastic members 40 are arranged on the periphery of the leg-hole openings 12 a and 12 b, and the waist-hole opening is provided on the periphery of the waist-hole opening 10. A plurality of waist elastic members 42 are disposed so as to surround 10, and a portion between the waist opening 10 and the leg openings 12 a and 12 b (that is, a portion corresponding to the wearer's abdomen). This is an example in which a plurality of belly stretchable members 44 are arranged so as to surround the wearer's belly.

  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.

[1-9] Solid gathering:
In order to prevent side leakage of urine excreted by the wearer, a three-dimensional gather may be provided. 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 such a three-dimensional gather, urine is excreted on the skin contact sheet, and even if the urine diffuses through the skin contact sheet, the three-dimensional gather becomes a breakwater, and the opening around the leg of the diaper Etc. (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 preferable to use a material in which a stretchable material (three-dimensional gather stretchable material) is disposed on a part of the ventilated water-repellent sheet, and a gather (sheet) is formed on the three-dimensional gather sheet material by the three-dimensional gather stretchable material. it can.

  The disposable diaper 1 shown in FIGS. 2 and 3 is formed by sticking three-dimensional gather sheet materials 32a and 32b, which are completely different from the top sheet 18 and the back sheet 20, to both side edges of the absorbent main body 14, and from the standing line 38. In this example, a pair of three-dimensional gathers 26a and 26b are formed by providing a structure that can stand up three-dimensionally. In this example, the end portions of the three-dimensional gather sheet materials 32a and 32b (the end portions corresponding to the upper end edges 34 of the three-dimensional gathers 26a and 26b) are folded back, and two three-dimensional gather elastic members 36a and 36b are formed at the folded portions. Or it arrange | positions so that the three-dimensional gather expansion-contraction material 36c, 36d may be inserted | pinched.

[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 in the case 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 skin contact sheet:
On the lower surface of the liner sheet 24b, a sheet material 48 for forming the stool catching space 50 is bonded to the outer edge of the stool passage opening 28a so as to surround the periphery of the stool passage opening 28a. At the same time, the upper sheet 24a is bonded to the upper surface of the liner sheet 24b while arranging the two opening elastic 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 28a and the urine passage opening 28b to be formed later, and the feces passage opening 28a and the urine passage It arrange | positions in the pattern which surrounds a part of periphery of the opening part 28b for an object.

  When the disposable diaper of the second invention is manufactured, the front body side and the rear of the outer edge of the stool passage opening formed later on the sheet material for forming the stool capturing space on the lower surface of the liner sheet The upper sheet is bonded to the upper surface of the liner sheet while two opening stretchable members are arranged in a predetermined pattern.

  Next, the stool passage opening 28a and the urine passage opening 28b are formed in the liner sheet 24b and the upper sheet 24a which are bonded together. By doing so, the two opening elastic members 30a and 30b intersect at a point P between the fecal passage opening 28a and the urine passage opening 28b, and the feces passage opening 28a and the urine passage opening. A skin contact sheet 24 having a two-layer structure arranged in a pattern surrounding a part of the periphery of 28b is obtained.

[2-3] Production of solid gathers:
One end of the three-dimensional gather sheet material 32a (32b) constituting the three-dimensional gather 26a (26b) is folded back, and the two three-dimensional gather elastic members 36a, 36b (36c, 36d) are sandwiched between the folded portions. The three-dimensional gather 26a (26b) is obtained by pasting together.

[2-4] Attaching skin contact sheet etc. to absorbent main body:
After the skin contact sheet 24 (liner sheet 24b) is bonded to the surface of the top sheet 18 constituting the absorbent main body 14, the side edges of the absorbent main body 14 and the skin contact sheet 24 (liner sheet 24b) are sandwiched. The solid gathers 26a and 26b are bonded together.

[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, the disposable diaper 1 shown in FIGS. 1-4 can be manufactured.

[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, also in these disposable diapers, a skin contact sheet in which an opening for passing stool is formed above the surface of the top sheet is disposed, and the stool passing sheet is disposed in the space between the skin contact sheet and the top sheet. The effect of the disposable diaper of the present invention can be enjoyed by providing a stool capturing space that communicates with the opening and captures stool.

  “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 diaper for infants or for adults such as elderly people and persons with disabilities who need care. The disposable diaper of the present invention can effectively prevent urine and stool from being mixed together, and the occurrence of diaper rash due to the mixture of urine and stool is effectively suppressed. It is particularly suitable as a disposable diaper for infants with weak skin and many skin troubles.

It is a schematic perspective view which shows one Embodiment of the disposable diaper of this invention, and is a schematic perspective view which shows the state seen from the front of a diaper. It is a top view which shows one embodiment of the disposable diaper of this invention (1st invention), expand | deploys the disposable diaper shown in FIG. 1, and is a top view which shows the state seen from the absorptive main body side of the diaper. It is a schematic sectional drawing which shows one Embodiment of the disposable diaper of this invention (1st invention), and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 2 along the X1-X1 'line. It is a schematic sectional drawing which shows one Embodiment of the disposable diaper of this invention (1st invention), and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 2 along the Y-Y 'line. It is a top view which shows one Embodiment of the disposable diaper of this invention (2nd invention), expand | deploys the disposable diaper shown in FIG. 1, and is a top view which shows the state seen from the absorptive main body side of the diaper. It is a schematic sectional drawing which shows one Embodiment of the disposable diaper of this invention (2nd invention), and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 5 along the X2-X2 'line. It is a schematic sectional drawing which shows other embodiment of the disposable diaper of this invention (1st invention), and is a schematic sectional drawing which shows the cross section similar to the disposable diaper shown in FIG. It is a schematic sectional drawing which shows other embodiment of the disposable diaper of this invention (1st invention), and is a schematic sectional drawing which shows the cross section similar to the disposable diaper shown in FIG.

Explanation of symbols

1,11,100: disposable diaper, 2: front body, 2a, 2b: side edge, 4: crotch, 6: back body, 6a, 6b: side edge, 8: joint, 10: opening around waist Part, 12, 12a, 12b: opening around leg, 14: absorbent main body, 16: exterior member, 18: top sheet, 20: back sheet, 22: absorber, 23: recess, 24: skin contact sheet, 24a : Upper sheet, 24b: liner sheet, 26, 26a, 26b: three-dimensional gather, 28: opening, 28a: feces passage opening, 28b: urine passage opening, 30: opening stretchable material, 32, 32a, 32b: Three-dimensional gather sheet material, 34: Upper edge, 36, 36a, 36b, 36c, 36d: Three-dimensional gather elastic material, 38: Standing wire, 40: Leg elastic material, 42: Waist elastic material, 44: Belly Ri stretchable material, 46: space, 48: sheet material 49: sheet material (strip-shaped sheet material), 50: stool trapping space, P: a point.

Claims (5)

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 A disposable diaper with a backsheet
The skin contact sheet is further provided with an opening (stool passing opening) that is disposed on the top sheet and allows the passage of feces.
In the space between the skin contact sheet and the top sheet, a stool capturing space for communicating with the stool passing opening and capturing the stool is formed,
The stool trapping space is formed on the stool passage opening on the back side of the skin contact sheet so that a sheet material made of a water-repellent material or a liquid-impermeable material surrounds the periphery of the stool passage opening. A disposable diaper that is formed into a bag by being joined to the outer edge. 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 A disposable diaper with a backsheet
The skin contact sheet is further provided with an opening (stool passing opening) that is disposed on the top sheet and allows the passage of feces.
In the space between the skin contact sheet and the top sheet, a stool capturing space for communicating with the stool passing opening and capturing the stool is formed,
In the stool capturing space, each end of the belt-shaped sheet material made of a water-repellent material or a liquid-impermeable material is at least two locations on the front body side and the back body side of the outer edge of the stool passage opening, The disposable diaper which is formed in the shape by which at least one side of the side was open | released by joining to the back surface side of the said skin contact sheet. The absorber has a recess formed on the upper surface side thereof,
The disposable diaper according to claim 1 or 2 , wherein the recess is disposed in a portion corresponding to the lower side of the stool capturing space. The disposable diaper as described in any one of Claims 1-3 in which the opening part (opening part for urine passage) through which urine can pass is further formed in the said skin contact sheet. Corresponding side edges of the front body and the back body are joined together to form one waist opening and a pair of leg openings, and between the waist opening and the leg openings. The disposable diaper according to any one of claims 1 to 4 , further comprising an abdominal circumference stretchable material disposed in a portion therebetween.

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