JP5090975B2 - Disposable diapers - Google Patents

Description

  The present invention includes an absorbent body, a top sheet, and a back sheet, and is disposed on an upper portion of the top sheet and allows a stool passage opening to pass therethrough, and a urine passage opening that allows a urine excreted by the wearer to pass therethrough. It is related with the disposable diaper provided with the skin contact sheet in which was formed.

  In recent years, as a diaper for infants or the elderly or the disabled, 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 the 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. In this disposable diaper, the urine excreted by the wearer permeates through the top sheet and is absorbed and held by the absorber by using the top sheet so that the surface of the top sheet contacts the wearer's skin. At the same time, leakage of excrement to the outside of the diaper is prevented by the back sheet having excellent leakage prevention.

  However, in the disposable diaper configured as described above, 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 by 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. The urine excreted by the wearer becomes difficult to mix with the stool, and the diaper rash is reduced. However, in the disposable diaper described in Patent Document 2, although mixing of urine and feces can be prevented to some extent, the urine and feces excreted by the wearer are 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.

  For such a problem, in the disposable diaper described in Patent Document 3, a space between the skin contact sheet and the top sheet is provided with a urine / feces separation wall that partitions the front body side and the back body side, It is expected that the urine and feces excreted by the wearer are reliably separated and absorbed and retained, and an excellent effect of effectively preventing the situation where the urine and feces are mixed can be expected.

  As described above, a series of problems seemed to be solved by the appearance of the disposable diaper of Patent Document 3 in the past trial and error. However, new problems have arisen in recent years.

  That is, when the urine passage opening is formed near the crotch, the cut surface of the skin contact sheet is exposed to form the opening shape of the urine passage opening. As a result, a delicate zone (for example, testicles) such as a male genital of the wearer hits (contacts) the cut surface, which is a new problem that skin trouble may occur.

  For example, as shown in FIGS. 13 and 14, when the cut surface of the skin contact sheet 24 is exposed, a delicate zone (for example, testicles) such as male genital D is easily hit (contacted) on the exposed cut surface, Such contact points tend to cause skin troubles. Even in a delicate zone (for example, testicles, etc.), even though skin troubles are likely to occur, repeated contact with the cut surface may cause further skin troubles. Even if there is no skin trouble, the contact with the cut surface tends to cause pain and pain, and the usability such as a feeling of use tends to be lowered.

  For such a new problem, a sufficient solution has not been shown at present, and further improvement is required.

Utility Model Registration No. 2559050 JP 2002-11044 A Japanese Patent No. 3919023 Kazuya Yamamoto, Dermatology 30, p. 949-956 (1998)

  The present invention has been made to solve the above-described problems of the prior art, and has a urine passage opening nearer to the crotch portion of the urine passage opening than the virtual contour of the urine passage opening. Disposable that can fold urine reliably and effectively prevent skin troubles by providing a bent portion that protrudes inward and that serves as a cushioning material for the wearer. It provides diapers.

  As a result of diligent studies to solve the problems of the prior art as described above, the present inventors have found that the urine passage opening is closer to the crotch portion of the urine passage opening than the virtual contour of the urine passage opening. The present invention has been completed by conceiving that the above problems can be solved by preventing the cut surface of the skin contact sheet and the male genitalia from coming into direct contact by providing a bent portion projecting inward. . Specifically, the following disposable diapers are provided by the present invention.

[1] The front body, the crotch part, and the back body are composed of each part, and are arranged so as to cover the upper surface of the absorber, and at least a part of the top sheet made of a liquid-permeable material; A disposable diaper arranged to cover the lower surface of the absorbent body and provided with a back sheet made of a liquid-impermeable material, wherein a skin contact sheet is arranged on the top sheet, and the skin contact In the sheet, a stool passage opening that allows stool to pass and a urine passage opening that allows urine to pass therethrough are formed, and the urine passage opening is provided near the crotch portion of the urine passage opening. The urine passage opening is provided with a bent portion projecting inside the urine passage opening from the virtual contour of the urine passage, and the fold passage portion is brought into contact with the male genital from the virtual contour of the urine passage opening by the urine passage opening. Part A disposable diaper configured to be bendable so as to be inclined downward.

[2] The disposable diaper according to [1], wherein a length of the bent part is formed to reach a vicinity of a center of the urine passage opening.

[3] The disposable diaper according to [1] or [2], wherein the bent portion is made of a hydrophilic material.

[4] The disposable diaper according to [1] or [2], wherein the bent portion is made of a hydrophobic material.

[5] The disposable diaper according to any one of [1] to [4], wherein the bent portion is formed so as to be a tongue-like convex portion.

[6] Any one of [1] to [5], wherein a plurality of the bent portions are formed along the urine passage opening and toward the inside of the opening in addition to the vicinity of the crotch. Disposable diapers described in 1.

[7] The disposable diaper according to any one of [1] to [6], wherein the bent portion is formed by an opening contour of the urine passage opening of the skin contact sheet.

[8] The disposable diaper according to any one of [1] to [6], wherein the bent part is formed of a sheet separate from at least one skin contact sheet.

[9] The disposable diaper according to any one of [1] to [8], which is for men.

  The absorbent article of the present invention is provided with a bent portion projecting inside the urine passage opening from the virtual contour of the urine passage opening in the vicinity of the crotch portion of the urine passage opening. Becomes a cushioning material around the wearer's genital area (contact), and even if the bent part is provided, urine can be absorbed reliably and skin troubles can be effectively prevented.

  Hereinafter, the best mode for carrying out the absorbent article of the present invention will be specifically described. However, the present invention broadly encompasses absorbent articles having the invention specific items, and is not limited to the following embodiments.

  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, for the convenience of drawing, about FIGS. 3-13, it drawn in the form which left the opening part elastic material, the belly circumference elastic material, and the waist elastic material from the 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. The “two-piece type” means that the absorbent main body 14 that absorbs and retains the excrement of the wearer (absorption / retention function), like the disposable diaper 1 shown in FIG. It means a diaper of a type configured as a separate member separated from the exterior member 16 that has the function of encapsulating the body (mounting function). As shown in FIGS. 3 and 4, the absorbent main body 14 is a member that includes an absorbent body 22, a top sheet 18, and a back sheet 20 as components.

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

[1] Configuration of the disposable diaper of the present invention:
The disposable diaper of this invention is comprised from each part of the front body 2, the crotch part 4, and the back body 6 like the disposable diaper 1 shown by FIGS. 1-4, The absorber 22 and the said absorber 22 are comprised. A top sheet 18 disposed so as to cover the upper surface and made of at least a part of a liquid-permeable material, and a back sheet 20 disposed so as to cover the lower surface of the absorber 22 and made of a liquid-impermeable material. I have. A skin contact sheet 24 is disposed on the top sheet 18, and a stool passage opening 28b through which stool can pass and a urine passage opening 28a through which urine can pass are formed in the skin contact sheet 24. In the vicinity of the crotch part 4 of the urine passage opening 28a, a bent portion 7 is provided that protrudes inside the urine passage opening 28a from the virtual contour of the urine passage opening 28a.

[1-1] Skin contact sheet:
The skin contact sheet is a member for separating the wearer's skin and the top sheet. As shown in FIGS. 1 to 4, the skin contact sheet is disposed on the top of the top sheet 18 and can pass stool. This is a sheet-like member in which a portion 28a and a fecal passage opening 28b are formed. 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.

  As shown in FIGS. 1 to 4, the skin contact sheet has an opening 28 (stool passing opening 28 b) through which the wearer excreted stool passes and an opening 28 (urine passing opening through which urine passes). The part 28a) needs to be formed. By adopting such a structure, the urine and feces excreted by the wearer pass through the skin contact sheet and fall onto the top sheet, greatly increasing the chance of direct contact between the feces and the wearer's skin. It becomes possible to decrease.

[1-1-1] Urine passage opening:
The urine passage opening in the present embodiment is an opening for allowing urine to pass therethrough, and is bent in the vicinity of the crotch portion so as to protrude inside the urine passage opening from the virtual contour of the urine passage opening. A site is provided. A conventional urine passage opening has a shape that facilitates passage of urine as an opening through which urine can pass. As this conventional urine passage opening, for example, a so-called opening (hole) shape such as a circular opening, an elliptical opening, or a rhombus opening is generally used. However, when the urine passage opening is formed in these conventional opening shapes, the part of the wearer in contact with the opening corresponds to a so-called delicate zone such as a male genitalia. Therefore, in the shape of the opening for urine passage described above, the contour portion of the opening, that is, the portion where the male genital in the vicinity of the crotch contacts, the male genital is pressed in the conventional opening shape, or the opening of the opening There is a risk that it may be put underneath and impair the comfort. Furthermore, there is a possibility of causing skin trouble by being pressed or pinched.

  This will be described specifically with reference to FIGS. 13 and 5. FIG. FIG. 13 is a view schematically showing a state where a male genitalia is in contact with a skin contact sheet 24 arranged in a conventional diaper and a urine passage opening 28a. FIG. 5 is a diagram schematically showing a state where the male genitalia is in contact with the skin contact sheet 24 and the urine passage opening 28a in the diaper of the present embodiment.

  As shown in FIG. 13, in the conventional diaper, the cut surface of the skin contact sheet 24 is exposed to form the urine passage opening 28a, and the cut surface is the peripheral edge of the urine passage opening 28a. It was. When the opening is formed in this way, the male genitalia easily comes into contact with the cut surface, and the contact point (the point indicated by the arrow in the figure) becomes painful or uncomfortable, causing skin troubles. It was easy to let. Therefore, in the present embodiment, as shown in FIG. 5, by forming an overhanged bent portion on the cut surface of the skin contact sheet, the skin trouble is not caused to the wearer without causing pain or discomfort. It is something to prevent.

  That is, the urine passage opening provided in the present embodiment is newly provided while the urine passage opening is generally provided with a contour of a so-called opening (hole) such as a circular opening, an elliptical opening, and a diamond opening. These openings (holes) are provided with a bent portion that protrudes inside the urine passage opening from the virtual contour of the urine passage opening, so that the bent portion is a buffer between the male genitalia and the edge of the opening. It becomes a material and does not squeeze or pinch male genitals. Therefore, skin trouble can be prevented without impairing comfort.

  Here, “the outline of the so-called opening (hole) such as a circular opening, an elliptical opening, and a rhombus opening is generally provided” is an opening such as a circular opening, an elliptical opening, and a rhombus opening. This is because, when all the outlines of the portions are provided, the shape of the opening is the same as that of the circular opening, the elliptical opening, the diamond opening, or the like. That is, in this embodiment, so-called openings such as a circular opening, an oval opening, and a rhombus opening are formed in an opening shape such as a circular shape, an oval shape, and a rhombus shape except for the vicinity of the crotch. Is.

  In addition, the “virtual contour of the urine passage opening” refers to a contour drawn when the opening is formed into a circular shape, an elliptical shape, a rhombus shape, or the like including the vicinity of the crotch. Specifically, the contour indicated by the dotted line shown in FIG. In addition, as described above, the virtual contour R is a urine passage opening such as a circular opening, an ellipse opening, a rhombus opening, or the like unless a bent portion projecting inside the urine passage opening is provided. This is the outline on which the outline of (hole) will be formed (drawn). Further, the “folded portion projecting inside the urine passage opening” refers to a portion projecting from the above-mentioned virtual contour inside the urine passage opening and bent, and is denoted by reference numeral 7.

[1-1-1-1] Bending part:
The bent portion that protrudes inside the urine passage opening is formed in the vicinity of the crotch portion of the urine passage opening so that the bent portion protrudes inside the urine passage opening from the virtual contour of the urine passage opening. Is desirable. The reason why the bent part is formed in the vicinity of the crotch part of the urine passage opening is that the skin contact sheet 24 and the male genitalia are easily in contact with each other near the crotch part as shown in FIG. This is to avoid such contact and prevent skin troubles. In addition, the skin contact sheet is formed so that the bent part is formed so as to "project beyond the virtual contour of the urine passage opening to the inside of the urine passage opening". In order to prevent urine from falling into the urine passage opening and to prevent leakage through the skin contact sheet, by preventing the contact with the urine passage opening. is there.

  Here, the “folded portion protruding to the inside of the urine passage opening” is bent and inclined toward the opening to the extent that urine can fall into the urine passage opening due to the contact of the male genitalia. It means a part. As shown in FIG. 12A, it is not preferable that it is not bent at all and does not incline because it is difficult for urine to fall into the urine passage opening when it is used as a female diaper, causing leakage. Further, if the skin contact sheet is bent along the cut surface, the cut surface disappears, but a so-called flange shape as shown in FIG. 12B is formed. It is because it is not preferable.

  For example, as shown in FIGS. 2 and 5, the bent portion 7 is formed so as to protrude inside the urine passage opening 28 a, or the urine passage opening with an appropriate inclination due to contact with the male genitalia. By forming so as to protrude inside 28a, skin troubles can be prevented and urine leakage can also be prevented, so that the effects of the present application can be achieved.

  Examples of the method for forming the bent part include (1) a part formed by a part of the skin contact sheet, and (2) a part in which a separate bent part is attached to the skin contact sheet.

  (1) As an example formed by a part of the skin contact sheet, specifically, as shown in FIGS. 1 and 7, a part of the skin contact sheet near the crotch is placed inside the urine passage opening. For example, the bent portion may be formed so as to be stretched toward the surface and overhang. When the bent portion is formed in this way, it can be configured as a single surface as a skin contact sheet, and can work together to prevent skin troubles.

  (1) Another example formed by a part of the skin contact sheet As shown in FIG. 9, a part of the skin contact sheet near the crotch is stretched toward the inside of the urine passage opening. In addition to forming the bent part so as to overhang, the skin contact sheet is partially extended from the vicinity of the center of the opening toward the crotch, so that the opening is formed in a so-called reverse convex shape. The thing which was done is mentioned. When the bent part is formed in this way, not only can the skin contact sheet work together as a single surface to prevent skin troubles, but also the contact part with the male genitals near the crotch can be reliably treated. The effect of can be produced more. Therefore, it can be said that it is one of the preferable forms.

  (2) In the case where the bent part is formed as a separate body, as shown in FIG. 8, there is one that affixes the separate bent part to the skin contact sheet near the crotch. When the bent portion is formed in this way, there is an advantage that not only the effect of the present application is achieved but also molding is easy. As a method for fixing the bent portion, the skin contact sheet is fixed by an adhesive or other means. For example, it may be an adhesive using a hot melt adhesive or other highly fluid adhesive, or it may be a heat seal or other welding by heat or ultrasonic waves.

  7 to 9, the urine passage opening 28a, the stool passage opening 28b, and other configurations of the opening elastic member 30 are omitted for the convenience of explanation.

  Further, it is preferable that the length of the bent portion is formed so as to reach the vicinity of the center of the urine passage opening. If the length of the bent portion is not formed to an appropriate length, it is difficult to solve the skin trouble because the contact portion is not sufficient. That is, if the length of the bent portion is short, it becomes a flange shape, and it is easy to press and pin the male genitalia. If the length of the bent portion is long, the urine is surely placed in the urine passage opening. It is not preferable because it does not fall into the water and causes leakage. Therefore, the length of the bent part is formed so as to reach the vicinity of the center of the urine passage opening, so that skin troubles such as squeezing or pinching male genitals can be eliminated, and leakage can be prevented reliably. preferable.

  Specifically, as shown in FIG. 6, it is preferable that the length of the bent portion is formed so as to reach the dotted line R shown near the center of the urine passage opening 28a. FIG. 6 is a development view shown in FIG. 2 and shows a range near the center. In the figure, for convenience of explanation, a part of the stretchable material or the like is omitted, and an arrow K in the figure indicates a region that can be taken by the bent portion 7.

  Moreover, it is preferable that a bending site | part is formed from the material which consists of hydrophilic property. When the bent part is made of a hydrophilic material, even if urine falls on the bent part, the bent part protrudes toward the inside of the urine passage opening, so that it is transmitted through the bent part. This is because urine can be reliably dropped into the urine passage opening while preventing urine leakage while passing through or through.

  In the case where the bent portion is formed from a hydrophilic material, examples of the hydrophilic material include tissue, absorbent paper, and a nonwoven fabric subjected to a hydrophilic treatment. Such a hydrophilic material (material) is preferably made of a sheet-like member made of a hydrophobic resin, because it is easy to form a bent portion.

  However, it is more preferable that the bent portion is made of a material because of its hydrophobicity. In this way, when the bent portion is formed of a hydrophobic material, even if urine falls on the bent portion, the bent portion does not get wet, so that it is possible to maintain a dry feel. Therefore, the skin trouble of the male genital which is a delicate zone which contacts the bending part can be prevented. Furthermore, as described above, the bent part projects toward the inside of the urine passage opening, so that urine can be reliably dropped into the urine passage opening while being transmitted through the bent part, thus preventing urine leakage. Because it can.

  In the case where the bent part is formed from a hydrophobic material, examples of the hydrophobic material include resins such as polyethylene, polypropylene, and polyester. Furthermore, specifically, a nonwoven fabric, a mesh sheet, a film, or the like made of polyethylene, polypropylene, polyester, polyethylene-polyester, or the like can be used. In addition, by using a sheet material made of a water repellent material, it is possible to improve the leakproof property against soft stool or watery stool. As this water-repellent material, a nonwoven fabric such as spunbond or card embossing can be used. Among these, nonwoven fabrics such as SMS (spunbond / meltblown / spunbond) and SMMS (spunbond / meltblown / meltblown / spunbond) have the advantage of high water pressure resistance and can be suitably used. The material of the hydrophobic sheet is preferably composed of a sheet-like member made of a hydrophobic resin, so that it is easy to mold the bent portion.

  Further, it is preferable that the bent portion is formed to be a tongue-like convex portion. If it is formed in such a tongue-like convex shape, it becomes a shape that conforms to the general shape of a male genital that comes into contact with it, which is preferable because skin troubles can be prevented reliably and appropriately.

  In addition to the vicinity of the crotch portion, it is preferable that a plurality of tongue-like convex portions are formed along the urine passage opening and toward the inside of the opening. It is because it can respond widely to male genitals that are individual delicate zones.

[1-1-2] Stool passage opening:
As long as the feces passage opening has a shape capable of passing feces, there is no particular limitation on the shape. 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.

  For example, the disposable diaper 1 shown in FIG. 2 has an elliptical opening having a major axis in the longitudinal direction of the diaper as a stool passing opening 28b 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”. Note that the shape of the opening is not limited to the shape of the opening. For example, in the portion corresponding to the crotch part 4 of the diaper of the skin contact sheet 24, the stool passing opening 28b is long in the front-rear direction of the diaper. You may form in the substantially hexagonal opening part etc. whose six corners are round shape.

  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 feces passage opening 28b and the urine. This is an example in which the crossing is made at a point P between the passage openings 28a and the stool passage openings 28b and the urine passage openings 28a are surrounded by a part of the periphery. 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.

  Moreover, the disposable diaper 1 shown to the disposable diaper 1 shown in FIG. 2 is the arrangement | positioning which the opening-part expansion-contraction materials 30a and 30b cross | intersect in the center of the crotch part 4. FIG. 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 28b and the urine passage opening 28a, which are relatively easily loosened, more closely contact the skin of the wearer. 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 28b It arrange | positions in the pattern by which the periphery of the front body 2 side of the opening part 28a for passage 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] 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.

[1-3] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the upper surface (surface located in a wearer's skin side at the time of mounting | wearing of a diaper) may be coat | covered. 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.

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

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

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

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

[1-5] Absorbent body:
In the two-piece type pants-type diaper, the top sheet, the back sheet, and the absorbent body are configured as one member called an “absorbent body” that is responsible for absorption and holding functions, and an exterior member that is manufactured separately. A disposable diaper is formed by joining. Like the sanitary napkin, this absorbent main body has a top sheet on the upper surface side of the absorbent body and a back sheet on the lower surface side. The absorbent body is interposed between the top sheet and the back sheet. It has a structured. For example, the disposable diaper 1 shown in FIG. 2 and FIG. 3 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 periphery 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.

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

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

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

[1-7] Various elastic materials:
In a pants-type disposable diaper, it is common to arrange an elastic material around the legs, arrange an elastic material around the waist, and more preferably arrange an elastic material around the abdomen.

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

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

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

  In the disposable diaper 1 shown in 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.

[1-8] Urine / feces separation wall:
It is preferable that the diaper in this embodiment is formed with a urine / feces separation wall. The urine / feces separation wall is a member for separating the urine excreted by the wearer from the stool, is constituted by a breathable water-repellent sheet, and is disposed in a 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 is formed 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 this invention, it is preferable that the urine / feces separation wall is comprised with the ventilation | gas_flowing 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. In addition, it is conceivable that the urine / feces separation wall is constituted by a liquid-impermeable sheet used for a back sheet. However, when a liquid-impermeable sheet such as a plastic film is used, (1) There is a problem that stuffiness is likely to occur because it is not provided, and (2) the fit with the wearer's body is low due to poor flexibility and shape followability. 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 is made of a breathable water-repellent sheet, preventing the above-mentioned problems and making it difficult to mix the urine and feces excreted by the wearer. The effect can be exhibited.

  Nonwoven fabrics such as spunbond and card embossing may be used as the constituent material of the breathable water repellent sheet, but SMS (spunbond / meltblown / spunbond), SMMS (spunbond / meltblown) are used because of their high water pressure resistance. / Melt blow / spun bond) or the like is preferably used.

  The ventilated water-repellent sheet can form a urine / feces separation wall by joining one end to the skin contact sheet and hanging the other end to the surface of the top sheet. Thus, by joining one end of the breathable water repellent sheet to the skin contact sheet, it is possible to prevent urine and feces from moving through the space above the urine / feces separation wall. Moreover, it is preferable that the other end of the ventilation water-repellent sheet is joined to the top sheet. By joining the other end of the breathable water repellent sheet to the top sheet, the urine / feces separation wall is firmly fixed without being displaced, so the space between the skin contact sheet and the top sheet is the front body side and the back It is surely partitioned from the body side.

  For example, in the disposable diaper 1 shown in FIGS. 2 and 4, one end of a ventilation water-repellent sheet 52 constituting the urine / feces separation wall 48 is joined to the surface (lower surface) of the liner sheet 24 b constituting the skin contact sheet 24, In this example, the other end is suspended to the surface of the top sheet 18 and then joined to the surface (upper surface) of the top sheet 18.

  When the urine / feces separation wall in the present embodiment has a long distance between one end (joint portion on the skin contact sheet side) and the other end (joint portion on the top sheet side) of the ventilated water-repellent sheet, the urine / feces separation wall This is preferable because the standing height of the skin can be increased and the skin contact sheet and the top sheet can be reliably separated. In this case, the breathable water repellent sheet is preferably folded once or plural times between one end and the other end thereof. With such a configuration, as shown in FIG. 5, the urine / feces separation wall 48 can be formed with a foldable portion that can be expanded and contracted in the vertical direction. The folded portion extends as the skin contact sheet 24 moves away from the top sheet 18 when the diaper is used, so that the standing height of the urine / feces separation wall 48 can be secured. In addition, the formation of the folded portion is also preferable in that the urine / feces separation wall 48 hardly restrains the behavior of the skin contact sheet 24. Furthermore, even when the ventilated water-repellent sheet is configured to be long, the vented water-repellent sheet is difficult to cover the surface of the top sheet immediately below the feces passage opening and the urine passage opening. Therefore, there is an advantage that the problem that the absorption of urine into the absorbent body is hindered by a breathable water-repellent sheet as will be described later.

  As a method of folding the breathable water repellent sheet, the cross section of the breathable water repellent sheet as viewed from the side is Z-shaped (folded twice), M-shaped (folded three times), and accordion (folded many times). And the like. For example, the disposable diaper 1 shown in FIG. 4 has a breathable water repellent sheet 52 after the breathable water repellent sheet 52 is folded so as to have a Z-shaped cross section (this folding may be referred to as “Z-fold”). In this example, one end of 52 is joined to the skin contact sheet 24 and the other end is joined to the top sheet 18. In these examples, the portions other than the one end 54 and the other end 56 of the ventilated water repellent sheet 52 (for example, the folded portion) are not joined to the skin contact sheet 24 and the top sheet 18.

  When forming a urine / feces separation wall, it is sufficient that the space between the skin contact sheet and the top sheet is partitioned into a front body side and a back body side, and the space is completely divided. Is not required. For example, in the disposable diaper 1 shown in FIG. 4, there are gaps on both the left and right sides of the urine / feces separation wall 48, and the space 46 communicates between the front body side and the back body side. This has the effect of making it difficult to mix urine excreted by the wearer and 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.

  For the disposable diaper of the present invention, the bonding position of the breathable water-repellent sheet to the skin contact sheet and the bonding position to the top sheet are close to each other, in other words, the distance in the front-rear direction of the diaper at both bonding positions is shortened. Thus, the area where the surface of the top sheet immediately below the stool passage opening and the urine passage opening is covered with the breathable water repellent sheet can be reduced.

  As described above, when the bonding position of the breathable water repellent sheet to the skin contact sheet and the bonding position to the top sheet are close to each other (that is, the distance in the front-rear direction of the diaper at both bonding positions), the top The area covered by the breathable water-repellent sheet bonded to the sheet and the top sheet surface immediately below the stool passage opening and the urine passage opening is the same as that of the diaper for adults and infants. The area is preferably 50 area% or less, and more preferably 30 area% or less. For example, the disposable diaper 1 shown in FIG. 2 and FIG. 4 is a diaper for infants, has a short distance between the joints 62b and 62d and the joint 66, and the feces passage opening 28a by the ventilated water-repellent sheet 52. This is an example in which the surface of the top sheet 18 immediately below is covered with about 30% of the opening area of the feces passage opening.

  In the disposable diaper of the present invention, the surface of the top sheet immediately below the stool passing opening or the urine passing opening may be covered with the folded portion of the breathable water repellent sheet. Since the folded part of the ventilated water repellent sheet is not joined to the top sheet and can move freely, it is difficult to cause problems such as the absorption of urine into the absorber and the cause of urine leakage as already described. Because.

  On the other hand, the disposable diaper of the present invention is also one of preferred embodiments in which a part of the surface of the top sheet is covered with a breathable water-repellent 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, There is an advantage that it is possible to prevent a situation where the stool is in direct contact.

  The urine / feces separation wall is preferably disposed between the stool passage opening and the urine passage opening. By arranging the urine / feces separation wall at such a position, the space between the skin contact sheet and the top sheet is divided into a space communicating with the stool passage opening and a space communicating with the urine passage opening. Can do. Urine and feces excreted by the wearer can be more reliably separated. For example, the disposable diaper 1 shown in FIG. 4 has a urine / feces separation wall 48 between the stool passage opening 28a and the urine passage opening 28b so as to partition the front body 2 side and the back body 6 side of the diaper. This is an example of arrangement.

  The length of the ventilated water-repellent sheet constituting the urine / feces separation wall is not particularly limited, and the height of the urine / feces separation wall (the distance between the skin contact sheet and the top sheet), the size of the folded portion, A desired length may be used in consideration of the joining position and the like.

[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 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:
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 fecal passage opening 28b and the urine passage opening 28a to be formed later, and the feces passage opening 28b and the urine passage It arrange | positions in the pattern which surrounds a part of periphery of the opening part 28a for an object.

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

  When the folding part 7 constitutes another pair with the skin contact sheet, the folding part 7 formed as a separate body is joined to the skin contact sheet 24.

  Further, one end 54 of the Z-folded breathable water-repellent sheet 52 (which will later become the urine / feces separation wall 48) is the surface (lower surface) of the liner sheet 24b, and the feces passage opening 28b and the urine passage opening 28a. Affixed to a position between, joined, and fixed (joined portions 62a, 62b, 62c, 62d). By doing so, the skin contact sheet 24 to which the air-permeable water-repellent sheet 52 to be the urine / feces separation wall 48 later is attached is obtained. At this time, the ventilated water-repellent sheet is not limited to the Z-folded one, and a plurality of folded structures may be used. This fixing is performed by a conventionally known bonding method used when manufacturing disposable diapers such as bonding with an adhesive such as a hot melt adhesive, heat sealing, ultrasonic sealing, heat bonding with an embossing roll, pressure bonding, or the like. be able to. The disposable diaper 1 shown in FIG. 4 is an example in which one end 54 of a breathable water-repellent sheet 52 is attached to the surface (lower surface) of the liner sheet 24b with a hot melt adhesive, and bonded and fixed.

[2-3] 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.

[2-4] Attaching skin contact sheet etc. to absorbent main body:
The front end side, the rear end side, and the left and right side edge sides of the skin contact sheet 24 (liner sheet 24b) are joined and fixed to the surface of the top sheet 18 constituting the absorbent main body 14 (joining portions 68a, 68b, 68c, 68d). At this time, the other end 56 of the ventilated water-repellent sheet 52 is bonded to the surface of the top sheet 18 to be bonded and fixed (bonding portion 66). These fixations can be performed by the same joining method as joining the breathable water-repellent sheet to the skin contact sheet. At this time, it is preferable that the breathable water-repellent sheet has a structure in which the air-repellent sheet is folded once or a plurality of times between the joint portions at both ends, since the standing height of the urine / feces separation wall can be increased. The disposable diaper 1 shown in FIG. 4 is an example in which the breathable water-repellent sheet 52 is Z-folded and folded twice. Note that the front end portion of the joint portion 66 forms an upright line of the urine / feces separation wall 48 when the diaper is worn. The disposable diaper 1 shown in FIG. 11 has a front end side, a rear end side, a left and right side edge side of the skin contact sheet 24, and the other end 56 of the breathable water repellent sheet 52 attached to the surface (upper surface) of the top sheet 18 with hot melt adhesive. This is an example of attaching, joining and fixing.

  After the front end side, the rear end side, the left and right side edge sides of the skin contact sheet 24 (the liner sheet 24b) and the other end 56 of the air-permeable water-repellent sheet 52 are bonded to the surface of the top sheet 18 as described above, the absorbent main body The three-dimensional gathers 26a and 26b are bonded together so as to sandwich the side edges of the skin contact sheet 24 and the skin contact sheet 24 (liner sheet 24b).

[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.

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

[3] Application target of the present invention:
The application object of the disposable diaper of this invention is not restricted to the said 2 piece type underpants type diaper, For example, it can apply also to a 1 piece type underpants type diaper and a tape type diaper. That is, also in these disposable diapers, the skin contact sheet is disposed above the surface of the top sheet, and the urine / feces separation wall constituted by the ventilated water-repellent sheet is disposed, whereby the effect of the disposable diaper of the present invention is achieved. You can enjoy it.

  “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 according to the present invention includes a bent portion projecting inside the urine passage opening from the virtual contour of the urine passage opening in the vicinity of the crotch portion of the urine passage opening. It becomes a cushioning material around the wearer's genital area (contact), and even if it has a bent part, it can be used as a disposable diaper that can absorb urine reliably and can effectively prevent skin troubles. it can.

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 the figure which showed typically the state where the male genitalia is contacting the skin contact sheet with which the disposable diaper of this invention is equipped, and the opening part 28 for urine passage. FIG. 6 is a development view of the diaper shown in FIG. 2, and is a schematic diagram showing a range near the center. FIG. 7 is a development view of the diaper shown in FIG. 1, and is a schematic view showing an example of a bent portion provided. FIG. 8 is a development view of the diaper shown in FIG. 1, and is a schematic view showing an example of a bent portion provided. FIG. 9 is a developed view of the diaper shown in FIG. 1, and is a schematic diagram illustrating an example of a bent portion provided. FIG. 10 is a development view of the diaper shown in FIG. 1, and is a schematic view showing an example of a bent portion provided. FIG. 3 is a partially enlarged plan view showing a plane in which a part of the disposable diaper of the present invention is enlarged, and is an enlarged plan view of a top sheet portion to which a breathable water repellent sheet and a skin contact sheet shown in FIG. 2 are joined. FIG. It is the figure which showed typically the unpreferable state of the bending site | part with which a disposable diaper is equipped. It is the figure which showed typically the unpreferable state of the bending site | part with which a disposable diaper is equipped. It is the figure which showed typically the state which the male genitalia is contacting the skin contact sheet with which the conventional disposable diaper is equipped, and the opening part 28 for urine passage. It is the figure which showed the conventional disposable diaper typically, Comprising: It is a top view.

Explanation of symbols

1: Disposable diaper, 2: Front body, 4: Crotch, 6: Back body, 14: Absorbent body, 16: Exterior member, 18: Top sheet, 20: Back sheet, 22: Absorber, 24: Skin contact Sheet, 28a: urine passage opening, 28b: stool passage opening, 7: bent part, 30, 30a, 30b: opening stretchable material, 40: leg stretchable material, 42: waist stretchable material, 44: Abdominal circumference stretchable material, 48: urine / feces separation wall, 52: ventilated water repellent sheet, 70: bent part, D: male genitalia, R: virtual contour.

Claims (9)

It consists of each part of the front body, the crotch and the back body,
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 is disposed on the top of the top sheet,
The skin contact sheet is formed with a stool passage opening through which stool can pass and a urine passage opening through which urine can pass,
In the vicinity of the crotch part of the urine passage opening is provided with a bent portion that protrudes inside the urine passage opening from the virtual contour of the urine passage opening,
A disposable diaper that is configured so that the bent part can be bent so as to be inclined downward from the virtual contour of the urine passage opening by contact with a male genitalia. .   The disposable diaper according to claim 1, wherein a length of the bent portion is formed so as to reach a vicinity of a center of the urine passage opening.   The disposable diaper according to claim 1 or 2, wherein the bent portion is made of a hydrophilic material.   The disposable diaper according to claim 1 or 2, wherein the bent portion is made of a hydrophobic material.   The disposable diaper of any one of Claims 1-4 formed so that the said bending site | part may become a tongue-like convex part.   The said bending site | part is formed in multiple numbers toward the inner side of an opening part while being along the said urine passage opening part besides the crotch lower part further. Disposable diapers.   The disposable diaper according to any one of claims 1 to 6, wherein the bent portion is formed by an opening contour of a urine passage opening of a skin contact sheet.   The disposable diaper according to any one of claims 1 to 6, wherein the bent portion is formed of a sheet separate from at least one skin contact sheet.   The disposable diaper according to any one of claims 1 to 8, which is for men.

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