JP4808501B2 - Disposable diapers - Google Patents

Description

  The present invention comprises an absorbent body, a top sheet, and a back sheet, and is arranged on the top sheet, and has a skin contact sheet formed with an opening through which feces can pass, and urine and feces excreted by the wearer individually. The present invention relates to a disposable diaper further provided with a urine / feces separation wall for collection.

  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. Further, a breathable water-repellent sheet (a urine / feces separation wall forming sheet) for forming a urine / feces separation wall that divides the space between the skin contact sheet and the top sheet into a front body side and a rear body side is a new component. As a result, 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, wherein the skin contact sheet is disposed on an upper part of the top sheet and has an opening (stool passing opening) through which feces can pass; and the skin A ventilated water-repellent sheet (urine / feces separation wall forming sheet) for forming a urine / feces separation wall that divides a space between the contact sheet and the top sheet into a front body side and a rear body side; The stool separation wall forming sheet has one end bonded to the back side of the skin contact sheet and the other end bonded to the surface side of the top sheet. There is a fold part that has at least one fold part in between, and is folded so as to be stretchable in the vertical direction. In the fold part, the folded urine / feces separation wall forming sheets are not separated from each other but are peeled off The disposable diaper in which the 1st temporary fix | stop part fixed to possible is formed.

[2] In the urine / feces separation wall forming sheet, the other end of the urine / feces separation wall forming sheet is fixed to the back side of the skin contact sheet so as not to be separated from each other but can be peeled off to form a second temporary fixing portion. ] The disposable diaper as described in.

[3] The first temporary fixing portions, the one in which are intermittently formed from one side edge of the urine-feces separating wall forming sheet to the other side edge [1] or [2] The disposable diaper described.

[4] The corresponding side edge portions 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 the above [1] to [3], further comprising an abdominal circumference elastic material disposed in a portion between the two.

[5] An absorber, a top sheet that is disposed 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 bottom sheet that covers the lower surface of the absorber. A back sheet made of a functional material, a skin contact sheet disposed on an upper portion of the top sheet and formed with an opening through which feces can pass (opening for passing stool), and the skin contact sheet and the top sheet. A method for producing a disposable diaper comprising a ventilated water-repellent sheet (urine / feces separation wall forming sheet) for forming a urine / feces separation wall that divides the space between the front body side and the rear body side, between one end and the other end of feces separating wall forming sheet has a bending portion of at least one location, forming a folded portion folded to allow expansion and contraction in the vertical direction, in the folded portion, folded A step of obtaining a temporary fixing sheet in which the urine / feces separation wall forming sheets are not separated from each other but are detachably fixed to form a first temporary fixing portion; and the temporary fixing on the back surface side of the skin contact sheet The manufacturing method of the disposable diaper provided with the process of joining the end of a sheet | seat, and joining the other end of the said temporary fix | stop sheet | seat to the surface side of the said top sheet.

[6] After the other end of the temporary fixing sheet is fixed to the back side of the skin contact sheet so as to be peelable but peelable, the second temporary fixing portion is formed, and then the skin contact sheet is attached to the top sheet. The manufacturing method of the disposable diaper as described in said [5] joined to the surface side.

[7] The first temporary fixing portions, the disposable diaper according to [5] or [6] to intermittently formed from one side edge of the urine-feces separating wall forming sheet to the other side edge Manufacturing method.

  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. In addition, about FIG.4, FIG.7 and FIG.8, the drawing was performed in the form which abbreviated the opening part elastic material, the belly circumference elastic material, and the waist elastic material from drawing for the convenience of drawing.

  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 is the backsheet which consists of the absorber 22, the top sheet 18 which consists of a liquid-permeable material at least partially, and the liquid-impermeable material like the disposable diaper 1 shown in FIGS. 20 is a disposable diaper having a skin contact sheet 24 formed with an opening (stool passing opening 28a) through which feces can pass, and a space between the skin contact sheet 24 and the top sheet 18 The urine / feces separation wall forming sheet 52 is further provided with a breathable water-repellent sheet (a urine / feces separation wall forming sheet 52) for forming a urine / feces separation wall that divides into a side 2 side and a back body 6 side. There together is joined to the rear surface side of the skin contact sheet 24, the other end 56 is joined to the surface side of the topsheet 18, between the end 54 and the other end 56, at least 1箇Has a bending portion of the upper and lower folded portion 58 are folded to allow expansion and contraction in the direction is formed, in the folded portion 58, the urine feces separating wall forming sheet 52 folded are not separated from each other but peelably secured A first temporary fixing portion 60 is formed.

[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. 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.

  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 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 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 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. The size of the hole or slit may be appropriately determined in consideration of the function of “passing stool”.

  In addition, the feces passage opening has a shape in which the opening area of the rear area (rear area) from the center line is smaller than the opening area of the front area (front area) from the center line in the front-rear direction. It is preferable to form the stool passage opening, and it is more preferable that the stool passage opening has a shape having a maximum opening width (maximum opening) in the front region. By setting it as such a shape, the situation which the stool which passed the skin contact sheet and fell on the top sheet adheres to a wearer's buttocks, especially a ridge groove can be prevented effectively. On the other hand, since the opening area of the front region is kept large, the passage of stool is not hindered.

  For example, the disposable diaper 1 shown in FIG. 2 has a stool passing opening 28a generally having a bowl shape, and has a shape in which a part of the front region has an outer edge projecting to the left and right. That is, since the protruding portion is the maximum opening, the disposable diaper 1 is formed in a shape in which the opening area of the rear region is smaller than the opening area of the front region of the feces passage opening 28a. It is formed in a shape having a maximum opening in the front region. In the present specification, the “center line in the front-rear direction” means a straight line extending in the left-right direction of the diaper from the midpoint of the straight line connecting the front end and the rear end of the feces passage opening 28a.

  The skin contact sheet may have a urine passage opening 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 oval urine passage opening 28b is further formed as an opening 28 in the skin contact sheet 24 in addition to a generally bowl-shaped stool passage opening 28a. is there. 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. Furthermore, when the skin contact sheet contracts, even when there is a gap between the skin contact sheet or the top sheet and the ventilated water-repellent sheet serving as the urine / feces separation wall, the gap can be filled. Therefore, it is possible to reliably partition the space between the skin contact sheet and the top sheet.

  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 central 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 materials (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 is not limited to such a sheet, and any 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 24 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.

[1-2] Urinary stool separation wall forming sheet:
The “urine / feces separation wall forming sheet” referred to in the present specification is a sheet-like shape for forming a urine / feces separation wall that partitions the space between the skin contact sheet and the top sheet into a front body side and a back body side. It is a member and is comprised from a ventilation water-repellent sheet. By this urine / feces separation wall forming sheet, a urine / feces separation wall which is a member for isolating urine excreted by the wearer and stool can be formed in the space between the skin contact sheet and the top sheet. By providing this urine / feces separation wall, the space between the skin contact sheet and the top sheet is partitioned into the front body side and the back body side with the urine / feces separation wall as a boundary, and urine is separated into the space on the front body side. The stool is guided to the space on the back body side. In addition, since the urine / feces separation wall forming sheet is composed of a breathable water-repellent sheet, urine that has passed through the sheet and is guided to the front body side does not ooze out to the back body side. Therefore, mixing of urine and stool can be effectively prevented, and occurrence of diaper rash due to mixing of urine and stool is effectively suppressed.

  In the disposable diaper of the present invention, the urine / feces separation wall forming sheet needs to be constituted by a breathable water-repellent sheet. Since the air-permeable and water-repellent sheet has low liquid permeability, it is possible to effectively prevent a situation in which urine or soft stool leaks out from the urine / feces separation wall and urine and stool are mixed. Note that it is conceivable that the urine / feces separation wall forming sheet is constituted by a liquid-impermeable sheet such as that used for a back sheet. However, when a liquid-impermeable sheet such as a plastic film is used, (1) ventilation There is a problem that stuffiness is likely to occur because it does not have the property, and (2) the fit property with the wearer's body is low because the flexibility and shape following property are poor. Moreover, when exposed from the opening part of a skin contact sheet and contacting a wearer's body, there exists a possibility of producing the malfunction that (3) the touch is bad and the wet feeling remains on the surface easily. Like the disposable diaper of the present invention, the urine / feces separation wall forming sheet is made of a breathable water-repellent sheet for the first time while preventing the above-mentioned problems and making it difficult to mix the urine excreted by the wearer and the stool. An excellent effect can be exhibited.

  As a constituent material of the urine / feces separation wall forming sheet, a breathable water repellent sheet (a sheet-like material having both breathability and water repellency), specifically, a nonwoven fabric such as spunbond or card embossing may be used. It is preferable to use non-woven fabrics such as SMS (spunbond / meltblown / spunbond) and SMMS (spunbond / meltblown / meltblown / spunbond) because of high water pressure resistance.

  This urine / feces separation wall forming sheet can form a urine / feces separation wall by joining one end of the sheet to the back side of the skin contact sheet and hanging the other end to the surface of the top sheet. By joining one end of the urine / feces separation wall forming sheet to the skin contact sheet in this manner, it is possible to prevent urine and feces from moving through the space above the urine / feces separation wall. Further, the other end of the urine / feces separation wall forming sheet needs to be joined to the surface side of the top sheet. By joining the other end of the urine / feces separation wall forming sheet to the top sheet, the urine / feces separation wall is firmly fixed without displacement, so the space between the skin contact sheet and the top sheet is the front body side. And is reliably partitioned from the back body side.

  For example, the disposable diaper 1 shown in FIGS. 3 and 4 has one end of a urine / feces separation wall forming sheet 52 constituting the urine / feces separation wall 48 on the back side (lower surface side) of the liner sheet 24b constituting the skin contact sheet 24. Is joined to the surface side (upper surface side) of the top sheet 18 after the other end is suspended to the surface of the top sheet 18. In this example, one end 54 of the urine / feces separation wall forming sheet 52 is connected to the back surface side of the skin contact sheet 24 by the joint portion 62, and the other end 56 of the urine / feces separation wall forming sheet 52 is connected to the front surface side of the top sheet 18 by the joint portion 66. It is joined to.

  In the disposable diaper of the present invention, it is only necessary that the space between the skin contact sheet and the top sheet is partitioned into the front body side and the back body side, and it is not necessary that the space is completely partitioned. . For example, in the disposable diaper 1 shown in FIG. 3, there are gaps on the left and right sides of the urine / feces separation wall forming sheet 52 that forms the urine / feces separation wall, and the space 46 communicates between the front body side and the rear body side. However, this also has the effect of making it difficult to mix the urine excreted by the wearer and the feces, and is included in the scope of the present invention. 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 space on the back body side because it is absorbed by the body.

  As for the disposable diaper of this invention, it is preferable that a part of surface of a top sheet is coat | covered with the urine / feces separation wall formation sheet. With such a configuration, urine that has passed through the top sheet from the space on the front body side moves to the back body side without being absorbed by the absorbent body, and even if it oozes from the surface of the top sheet, It is possible to prevent the situation where the stool is in direct contact.

  For example, in the disposable diaper 1 shown in FIGS. 3 and 4, one end of the urine / feces separation wall forming sheet 52 is joined to the skin contact sheet 24, and the urine / feces separation wall forming sheet 52 is suspended to the surface of the top sheet 18, Furthermore, it is the example arrange | positioned so that a part of surface of the back body 6 side of the top sheet 18 may be coat | covered. In this example, a part of the surface of the top sheet 18 including the portion immediately below the fecal passage opening 28 a is covered with the urine / feces separation wall forming sheet 52.

  In the disposable diaper of the present invention, it is preferable to arrange the urine / feces separation wall forming sheet so that the urine / feces separation wall is formed in the crotch part, and the portion where the urine / feces separation wall can come into contact with the wearer's perineum It is more preferable to arrange a urine / feces separation wall forming sheet so as to be formed. By forming a urine / feces separation wall in such a portion, it is possible to reliably separate urine and feces excreted by the wearer. For example, the disposable diaper 1 shown in FIG. 4 is a urine / feces separation wall-forming sheet so that the urine / feces separation wall is formed in a crotch part 4 of the diaper, more specifically, a portion that can contact the perineum of the wearer. This is an example in which 52 is arranged.

  When two openings, a stool passage opening and a urine passage opening, are formed in the skin contact sheet, a urine / feces separation wall is formed between the stool passage opening and the urine passage opening. Thus, it is preferable to arrange a urine / feces separation wall forming sheet. By arranging the urine / feces separation wall forming sheet in such a position, the urine / feces separation wall can be formed between the feces passage opening and the urine passage opening, and the skin contact sheet and the top sheet Can be partitioned into a space communicating with the fecal passage opening and a space communicating with the urine passage opening. This makes it possible to more reliably separate urine and feces excreted by the wearer. For example, in the disposable diaper 1 shown in FIG. 4, a urine / feces separation wall that partitions the front body 2 side and the back body 6 side of the diaper is formed between the stool passage opening 28a and the urine passage opening 28b. In this way, the urine / feces separation wall forming sheet 52 is disposed.

In the disposable diaper of the present invention, the urine / feces separation wall forming sheet has at least one folded portion between one end and the other end, and is formed with a folded portion that is folded up and down in the vertical direction. It is necessary to be. When the folding portion is formed, the urine / feces separation wall can be formed with a foldable / extendable fold in the up / down direction, so that the urine / feces separation wall rarely restrains the behavior of the skin contact sheet. Therefore, the skin contact sheet can be more closely attached to the wearer's body.

  As a specific shape of the folding part, it is sufficient that at least one folding part is formed. For example, a cross-sectional V-shape (one folding part), a cross-sectional Z-shape (two folding parts), and a cross-section M Various shapes, such as a letter shape (3 places of folding parts), can be mentioned. For example, in the disposable diaper 1 shown in FIG. 3 and FIG. 4, the urine / feces separation wall forming sheet 52 is folded so as to have a Z-shaped cross section, and one end of the urine / feces separation wall forming sheet 52 is used as a skin contact sheet. This is an example in which the other end is joined to the top sheet 18 and the lower surface side of the folded portion 58 is not joined.

And the disposable diaper of this invention needs that the 1st temporary fix | fixed part to which the folded urine / feces separation wall formation sheet | seat was fixed not to mutually separate but to be able to peel was formed in the folding part. . Disposable diapers are often manufactured by laminating sheet-like members, and the production of the disposable diapers is required to be smoothly delivered. However, when the folded portion is formed as in the disposable diaper of the present invention, the folded urine / feces separation wall forming sheets are separated from each other in the process of feeding the sheet, even if the folded portion is folded in an untreated state. The urine / feces separation wall forming sheet is crumpled and joined to the top sheet, which may cause manufacturing troubles. By forming the first temporary fixing portion in the folding portion as in the present invention, the folded urine / feces separation wall forming sheets are suppressed from being separated from each other, and the above-described troubles are prevented.

For example, in the disposable diaper 1 shown in FIGS. 3 and 4, the folded urine / feces separation wall forming sheet 52 is fixed to the folding portion 58 of the urine / feces separation wall forming sheet 52 so as to be peeled but not separated from each other. This is an example in which one temporary fixing portion 60 is formed. In this example, the urine / feces separation wall forming sheet 52 folded by the first temporary fixing part 60 is detachably fixed, and the urine / feces separation wall forming sheet 52 is prevented from being separated from each other. .

  The first temporary fixing portion may be formed in any form as long as the folding portion is prevented from being separated and the urine / feces separation wall forming sheet and the skin contact sheet can be fixed. For example, FIG. 5 is an example in which the first temporary fixing portions 60 are formed at both side edges of the urine / feces separation wall forming sheet 52 in the folded portion 58 of the urine / feces separation wall forming sheet 52. In the example of FIG. 5, the folding portions 58 having a width of 30 mm are formed, and the first temporary fixing portions 60 are formed at a total of 6 locations on each side edge portion, 3 locations at 10 mm intervals.

However, it is preferable that the 1st temporary fix | stop part is made | formed intermittently from one side edge part of the urine / feces separation wall formation sheet to the other side edge part. For example, as shown in FIG. 6, when the first temporary fixing portion 60 is intermittently formed from one side edge portion of the urine / feces separation wall forming sheet 52 to the other side edge portion, the first temporary fixing portion 60 is formed. The positioning of the urine / feces separation wall forming sheet 52 with respect to the side edge portion is not necessary, and therefore the effect of fixing the first temporary fixing portion 60 so as not to be separated from each other but to be peeled off is lost due to the position shift of the first temporary fixing portion 60. Such a problem is difficult to occur. That is, there is an advantage that the positioning work when forming the first temporary fixing portion is not required, the manufacture of the diaper is facilitated, and the effect of the fixing can be surely obtained. In the example of FIG. 6, strip-shaped first temporary fixing portions 60 having a 45 mm slope and having a width of 1.5 mm are intermittently formed at a pitch of 5 mm.

In the disposable diaper of the present invention, the other end of the urine / feces separation wall forming sheet is fixed to the back side of the skin contact sheet so as not to be separated from each other but can be peeled off to form a second temporary fixing portion. It is preferable. In a diaper having such a structure, the urine / feces separation wall forming sheet is fixed to the skin contact sheet so as to be peelable but not separated from each other , and the urine / feces separation wall forming sheet is peeled and fixed to the skin contact sheet. It can be easily manufactured by a method such as bonding to a top sheet. At this time, if there is a free end portion, it may cause a manufacturing trouble as described above. However, as in the present invention, the other end of the urine / feces separation wall forming sheet is releasably fixed to the second temporary fixing portion. The free end portion of the urine / feces separation wall forming sheet is fixed to the skin contact sheet. Therefore, the above manufacturing trouble can be prevented beforehand.

For example, the disposable diaper 1 shown in FIGS. 3 and 4 has one end of a urine / feces separation wall forming sheet 52 constituting the urine / feces separation wall 48 on the back side (lower surface side) of the liner sheet 24b constituting the skin contact sheet 24. In addition to joining 54, the other end 56 is also fixed to the back surface side of the skin contact sheet 24 so as to be peeled but not separated from each other . In this example, the other end 56 of the urine / feces separation wall forming sheet 52 is detachably fixed to the back surface side of the skin contact sheet 24 by a second temporary fixing portion 64.

  The first temporary fixing portion may be formed in any form as long as the folding portion is prevented from being separated and the urine / feces separation wall forming sheet and the skin contact sheet can be fixed. For example, FIG. 5 is an example in which the first temporary fixing portions 60 are formed at both side edges of the urine / feces separation wall forming sheet 52 in the folded portion 58 of the urine / feces separation wall forming sheet 52. In the example of FIG. 5, the folding portions 58 having a width of 30 mm are formed, and the first temporary fixing portions 60 are formed at a total of 6 locations on each side edge portion, 3 locations at 10 mm intervals.

However, it is preferable that the 1st temporary fix | stop part is made | formed intermittently from one side edge part of the urine / feces separation wall formation sheet to the other side edge part. For example, as shown in FIG. 6, when the first temporary fixing portion 60 is intermittently formed from one side edge portion of the urine / feces separation wall forming sheet 52 to the other side edge portion, the first temporary fixing portion 60 is formed. Since the operation of positioning the urine / feces separation wall forming sheet 52 with respect to the side edge of the urine / feces separation wall forming sheet 52 is not necessary, the effect of being separable but not separated from each other due to the displacement of the first temporary fixing portion 60 is lost. Problems are unlikely to occur. That is, there is an advantage that the positioning work when forming the first temporary fixing portion is not required, the manufacture of the diaper is facilitated, and the effect of the fixing can be surely obtained. In the example of FIG. 6, strip-shaped first temporary fixing portions 60 having a 45 mm slope and having a width of 1.5 mm are intermittently formed at a pitch of 5 mm.

  In this specification, the term “temporarily fastened” means that when a peeling force is applied to the fixing portion in the direction of 90 °, it is fixed to such an extent that it can be easily peeled (this definition is This also applies to the first temporary fixing portion and the second temporary fixing portion.) That is, the temporary fixing referred to in the present specification is intended to fix the members so as not to be separated from each other at the time of manufacture of the diaper. Therefore, when the diaper is actually used, it is natural or extremely weak. It is preferable that it is peeled off by force. As a temporary fixing method, a method of temporarily fixing a tape-type diaper tape fastener in a folded state is known (for example, JP-A-10-24066, JP-A-2002-159530, etc.). This method can also be used in the present invention. Specific examples include bonding with a hot melt adhesive, hot embossing, and extremely weak welding or ultrasonic bonding by ultrasonic welding.

  As described above, the disposable diaper in which the temporary fixing portion is formed can be easily peeled off by the force of a human hand. For example, the disposable diaper 1 shown in FIG. 4 forms a urine / feces separation wall 48 having a Z-shaped cross section as shown in FIG. 7 by peeling the first temporary fixing part 60 and the second temporary fixing part 64. can do. As shown in FIG. 8, the urine / feces separation wall 48 is formed with a fold by the folded portion of the urine / feces separation wall forming sheet 52 and can expand and contract in the vertical direction. Therefore, the urine / feces separation wall 48 hardly restrains the behavior of the skin contact sheet 24, and the skin contact sheet 24 can be more closely attached to the wearer's body.

[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.

[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. This absorbent main body has a structure in which a top sheet is disposed on the upper surface side of the absorbent body and a back sheet is disposed on the lower surface side, and the absorbent body is interposed between the top sheet and the back sheet. For example, the disposable diaper 1 shown in FIGS. 3 and 4 includes the top sheet 18 and the back sheet by sandwiching the absorbent body 22 between the top sheet 18 and the back sheet 20 and sealing the peripheral edge of the absorbent body 22. 20 is an example in which the absorbent main body 14 having a structure in which an absorber 22 is interposed between the absorbent body 14 and the absorbent body 14 is configured.

  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 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 and prevents urine leakage from around the waist. In addition, the fit of the diaper to the wearer is improved, and the diaper is prevented 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. Further, the skin contact sheet can be surely pressed against the wearer's crotch, and the displacement of the skin contact sheet can be effectively prevented.

  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 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 possible to suitably use a stretchable material (three-dimensional gather stretchable material) disposed on a part of the ventilated water-repellent sheet, and a sheet (gather) formed on the sheet material by the three-dimensional gather stretchable material.

  The disposable diaper 1 shown in FIGS. 2 and 3 has sheet materials 32 a and 32 b that are completely different from the top sheet 18 and the back sheet 20 attached to both side edges of the absorbent main body 14 and three-dimensionally from the standing line 38. In this example, a pair of solid gathers 26a and 26b is formed by using a structure that can stand up. In this example, the end portions of 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 expansion / contraction materials 36a and 36b or three-dimensional gathers are formed at the folded portions. It arrange | positions so that the expansion-contraction materials 36c and 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] Temporary fixing of urine / feces separation wall forming sheet:
A folded portion 58 is formed at one end of the urine / feces separation wall forming sheet 52 to be the urine / feces separation wall 48. The folded portion 58 is fixed by a hot-melt adhesive so that the folded urine / feces separation wall forming sheets 52 are not separated from each other but can be peeled off . The temporary fixing part 60 is formed by this adhering .

[2-3] Production of skin contact sheet:
The upper sheet 24a is bonded to the upper surface of the liner sheet 24b 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 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.

  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.

[2-4] Joining and temporary fixing of urine / feces separation wall forming sheet to skin contact sheet:
As shown in FIG. 9, one end 54 of the urine / feces separation wall forming sheet 52 (temporary fixing sheet 70) in which the folded portion is temporarily fixed to form the first temporary fixing portion 60 is joined to the back side of the skin contact sheet 24. To do. In the example of FIG. 9, the urine / feces separation wall forming sheet 52 (temporary fixing sheet 70) and the liner sheet 24 b are joined by adhesion using a hot melt adhesive, and the joining portion 62 is formed by this joining. Yes.

Next, as shown in FIG. 9, the other end 56 of the urine / feces separation wall forming sheet 52 (temporary fixing sheet 70) is fixed to the back side of the skin contact sheet 24 so as not to be separated from each other but to be peeled off . A temporary fixing portion 64 is formed. In the example of FIG. 10, the urine / feces separation wall forming sheet 52 (temporary fixing sheet 70) and the skin contact sheet 24 are fixed to each other without being separated from each other by adhesion using a hot melt adhesive. The second temporary fixing portion 64 is formed by this fixing .

[2-5] 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.

[2-6] Attaching skin contact sheet etc. to absorbent main body:
As shown in FIG. 10, the skin contact sheet 24 to which the urine / feces separation wall forming sheet 52 is bonded and peeled off is attached to the surface side of the top sheet 18 constituting the absorbent main body. At this time, the skin contact sheet 24 is joined to the surface side of the top sheet 18 by the joining portion 68. Then, as shown in FIG. 3, the three-dimensional gathers 26a and 26b are bonded together so that the side edge of the absorptive main body 14 and the skin contact sheet 24 (liner sheet 24b) may be pinched | interposed.

[2-7] 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.

[2-8] 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, the urine / feces separation wall is formed by arranging the skin contact sheet above the surface of the top sheet and the urine / feces separation wall forming sheet constituted by the ventilated water-repellent sheet. This makes it possible to enjoy the effects of the disposable diaper of the present invention.

  “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, is a top view which expand | deploys the disposable diaper shown in FIG. 1, and 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, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 2 along the X-X 'line. It is a schematic sectional drawing which shows one 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 Y-Y 'line. It is a top view which shows one Embodiment which temporarily fixed the folding part of the urine / feces separation wall formation sheet. It is a top view which shows another embodiment which temporarily fixed | folded the folding part of the urine / feces separation wall formation sheet. It is a schematic sectional drawing which shows one use condition 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 Y-Y 'line. It is a schematic sectional drawing which shows one use condition 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 Y-Y 'line. It is a top view which shows one Embodiment of the skin contact sheet to which the urine / feces separation wall formation sheet was joined and temporarily fixed. It is a top view which shows one Embodiment of the top sheet to which the urine / feces separation wall formation sheet and the skin contact sheet were joined.

Explanation of symbols

1: disposable diaper, 2: front body, 2a, 2b: side edge, 4: crotch, 6: back body, 6a, 6b: side edge, 8: joint, 10: waist opening, 12, 12a, 12b: Leg opening, 14: Absorbent body, 16: Exterior member, 18: Top sheet, 20: Back sheet, 22: Absorber, 24: Skin contact sheet, 24a: Upper sheet, 24b: Liner sheet , 26, 26a, 26b: solid gather, 28: opening, 30: opening stretchable material, 32, 32a, 32b: sheet material, 34: upper edge, 36, 36a, 36b, 36c, 36d: solid gather stretchable material 38: Standing wire, 40: Elastic material around the leg, 42: Elastic material around the waist, 44: Elastic material around the abdomen, 46: Space, 48: Urine separation wall, 52: Urine separation wall forming sheet, 54: One end , 56: End, 58: folded portion, 60: first temporary fixing portions, 62: junction, 64: second temporary fixing portions, 66 and 68: junction, 70: temporary fixing sheet, P: a point.

Claims (7)

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
A skin contact sheet disposed on the top sheet and formed with an opening (stool passing opening) through which feces can pass; and a space between the skin contact sheet and the top sheet on the front body side An air-repellent water-repellent sheet (urine / feces separation wall forming sheet) for forming a urine / feces separation wall that partitions the back body side;
The urine / feces separation wall forming sheet has one end bonded to the back surface side of the skin contact sheet and the other end bonded to the front surface side of the top sheet, and the gap between the one end and the other end. , Having a fold portion at least one place, a fold portion is formed that is folded up and down in the vertical direction ,
The disposable diaper in which the first temporary fixing part to which the folded urine / feces separation wall forming sheet is fixed so as to be peeled off is formed in the folded part. 2. The urine / feces separation wall forming sheet according to claim 1, wherein the other end of the urine / feces separation wall forming sheet is fixed to the back side of the skin contact sheet so as not to be separated from each other but to be peeled off, thereby forming a second temporary fixing portion. Disposable diapers. The first temporary fixing portions, the disposable diaper according to claim 1 or 2 from one side edge of the urine-feces separating wall forming sheet are those which are discontinuously formed to the other side edge.   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 between the waist opening and the leg openings. The disposable diaper as described in any one of Claims 1-3 further equipped with the belly circumference elastic material arrange | positioned in this part. 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 back contact sheet, a skin contact sheet that is disposed above the top sheet and has an opening through which stool can pass (opening for passing stool), and a space between the skin contact sheet and the top sheet A disposable diaper manufacturing method comprising a ventilated water-repellent sheet (urine / feces separation wall forming sheet) for forming a urine / feces separation wall that divides a front body side and a rear body side,
Between the one end and the other end of the urine / feces separation wall forming sheet, there is a step of forming a folded portion that has at least one folded portion and is folded so as to expand and contract in the vertical direction ;
In the folding portion, the folded urine / feces separation wall forming sheets are not separated from each other but are releasably fixed to obtain a temporary fixing sheet in which a first temporary fixing portion is formed;
The manufacturing method of the disposable diaper provided with the process of joining one end of the said temporary fix | stop sheet | seat to the back surface side of the said skin contact sheet, and joining the other end of the said temporary fix | stop sheet to the surface side of the said top sheet. After the other end of the temporary fixing sheet is peeled and fixed to the back side of the skin contact sheet, but the second temporary fixing portion is formed, the skin contact sheet is placed on the surface side of the top sheet. The manufacturing method of the disposable diaper of Claim 5 to join. The manufacturing method of the disposable diaper of Claim 5 or 6 which forms the said 1st temporary fix | stop part intermittently from one side edge part of the said urine / feces separation wall formation sheet to the other side edge part.

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