JP5280653B2 - Disposable diapers - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper capable of preventing discharged feces from easily coming into contact with the skin of a wearer, suppressing the pain of a crotch part or the like and suppressing skin troubles. <P>SOLUTION: The disposable diaper is formed of respective parts of a front section 2, a crotch part 4 and a back section 6, and is provided with an absorbent 22, a top sheet 18 arranged on the upper surface of the absorbent 22, a back sheet 20 arranged on the lower surface of the absorbent 22, and a skin contact sheet 24 which has a feces passing opening 26 formed thereon and is arranged such that the front end part is positioned above the crotch part 4 of the top sheet 18 and the rear end part is positioned above the back section 6 of the top sheet 18. In the skin contact sheet 24, a flexible area 30 having flexible force in a width direction and/or a longitudinal direction is formed at at least a part of the outer edge of the feces passing opening 26, and a non-flexible area 31 not having the flexible force in the width direction and the longitudinal direction is formed at least more on the front end part side than the flexible area 30. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a disposable diaper that includes an absorbent body, a top sheet, and a back sheet, and further includes a skin contact sheet that is disposed so as to cover the upper side of the top sheet and that has an opening through which feces can pass. It is.

  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 (see, for example, Patent Document 1).

  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 is proposed in which another sheet body (hereinafter referred to as “skin contact sheet”) is disposed above the top sheet (see, for example, Patent Document 2). . 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 such a disposable diaper as described in Patent Document 2, the skin contact sheet first comes into contact with the wearer's skin (buttock), so the top sheet disposed below the skin contact sheet is the wearer's skin. It becomes difficult to make direct contact with the buttocks. That is, a wearer's buttocks and a top sheet are separated. In addition, a shielding layer called a skin contact sheet is interposed between the top sheet and the buttocks of the wearer. Therefore, even if stool remains on the top sheet, it is possible to expect an effect of greatly reducing the chance that the stool and the wearer's buttocks come into direct contact.

Japanese Patent No. 2572744 JP 2007-125259 A

  Such a skin contact sheet is usually provided with a stretchable elastic material to form a stretchable region for the purpose of improving adhesion to the wearer's skin. In general, the stretchable region is in a state in which wavy gathers are formed by the stretchable elastic material. The gathers thus formed may cause the wearer to feel discomfort or pain when pressed against the wearer's skin. In particular, the region including the crotch part of the diaper is a portion where the wearer strongly presses or frequently rubs, so that when the gathers are formed, the above-described pain or the like occurs, and skin trouble is likely to occur. In this respect, conventional disposable diapers are not fully satisfactory, and still have problems to be solved.

  Thus, at present, there is no disclosure of a disposable diaper in which excreted stool is less likely to come into direct contact with the wearer's skin and which can suppress pain in the crotch, etc., and such disposable Diapers are anxious. The present invention has been made in order to solve the above-described problems of the prior art, and the excreted stool is less likely to come into direct contact with the wearer's skin and suppresses pain in the crotch, etc. The present invention provides a disposable diaper capable of suppressing the occurrence of trouble.

  As a result of intensive studies to solve the problems of the prior art as described above, the skin contact sheet configured to cover the back body side from the crotch part of the top sheet is the skin contact sheet. A stretchable region having a stretching force in the width direction and / or the longitudinal direction is formed on at least a part of the outer edge of the stool passage opening, and a stretching force in the width direction and the longitudinal direction is formed on the front end side of the stretchable region. The present invention was completed by conceiving that the above-mentioned problems can be solved by forming a non-stretchable region that does not have any. Specifically, the following disposable diapers are provided by the present invention.

[1] An absorbent body formed from the front body, the crotch part, and the back body, a top sheet that is made of at least a part of a liquid-permeable material and covers the upper surface of the absorbent body, and a liquid A back sheet made of an impermeable material and disposed so as to cover the lower surface of the absorbent body, and a skin contact sheet in which a fecal passage opening is formed and disposed above the top sheet, The skin contact sheet is disposed such that a front end portion is located above the crotch portion of the top sheet and a rear end portion is located above the back body of the top sheet. The opening stretchable material continuously extends along at least a part of the outer edge of the opening for use and extends in the longitudinal direction from the rear end portion of the skin contact sheet toward the front end portion. An elastic region having an elastic force in the width direction and / or the longitudinal direction is formed on at least a part of the outer edge of the stool passing opening of the skin contact sheet, and at least a front end portion than the elastic region A non-stretchable region that is continuous in the longitudinal direction from a part of the front end of the stool passage opening to a part of the front end of the skin contact sheet and has no stretching force in the width direction and the longitudinal direction. And the front end portion of the skin contact sheet is joined to the surface of the top sheet, and a space formed between the skin contact sheet and the back body side surface of the top sheet, A disposable diaper partitioned off from the space on the front body side.

[2] In the skin contact sheet, an opening stretchable material is disposed in an expanded state along at least a part of the outer edge of the stool passing opening, and the front end of the skin contact sheet is located in front of the stretchable region. The disposable diaper according to [1], wherein the non-stretchable region is formed by a portion where the opening stretchable material is cut and the opening stretchable material is cut on a part side.

[3] The skin contact sheet is one in which an opening elastic member is arranged in an extended state along at least a part of an outer edge of the stool passing opening, or is made of an elastic sheet, and the skin A non-stretchable sheet that does not have a stretching force is attached to the front end side of the contact sheet from the stretchable region, and the non-stretchable region is formed by a portion where the non-stretchable sheet is stuck. The disposable diaper according to the above [1].

[4] The disposable diaper according to any one of [1] to [3], wherein the length in the width direction of the non-stretchable region is 10 to 80% of the width of the skin contact sheet.

[ 5 ] The disposable diaper according to any one of [1] to [ 4 ], wherein at least a pair of three-dimensional gathers, which are three-dimensionally standing leak-proof walls, are formed on both sides of the skin contact sheet.

  The disposable diaper of the present invention makes it difficult for the excreted stool to be in direct contact with the wearer's skin, and suppresses pain caused by a portion corresponding to the crotch part of the skin contact sheet, and effectively suppresses the occurrence of skin troubles. To get. For this reason, there exists an outstanding effect that it is possible to use a disposable diaper comfortably, without making a wearer feel the discomfort and pain by a skin contact sheet.

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

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

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

[1] Configuration of the disposable diaper of the present invention:
The disposable diaper of this invention is formed from each part of the front body 2, the crotch part 4, and the back body 6 like the disposable diaper 1 shown in FIGS. 1-3, and the absorber 22 and at least one part are liquid-permeable. A top sheet 18 made of a material and arranged to cover the upper surface of the absorbent body 22; a back sheet 20 made of a liquid-impermeable material and arranged to cover the lower surface of the absorbent body 22; This is a disposable diaper 1 having an opening 26 for use and a skin contact sheet 24 disposed above the top sheet 18.

  The skin contact sheet 24 constituting the disposable diaper 1 of the present invention is disposed such that the front end portion is located above the crotch portion 4 of the top sheet 18 and the rear end portion is located above the rear body 6 of the top sheet 18. An elastic region 30 having an elastic force in the width direction and / or the longitudinal direction is formed on at least a part of the outer edge of the stool passage opening 26 of the skin contact sheet 24, and more than the elastic region 30. A non-stretchable region 31 that does not have a stretching force in the width direction and the longitudinal direction is formed at least on the front end side.

  The skin contact sheet is positioned so that the front end is located above the crotch of the top sheet and the rear end is located above the back body of the top sheet. The region will be arranged in the crotch part of the disposable diaper. A large gather is not formed in such a non-stretchable region of the skin contact sheet, and pain and skin troubles due to a portion corresponding to the crotch portion of the skin contact sheet can be effectively suppressed.

  Here, the longitudinal direction of the skin contact sheet is the front-rear direction when the disposable diaper is attached to the wearer, and the width direction is the left-right direction when the disposable diaper is attached to the wearer.

  In the present embodiment, the stretching force is a value (g / g) obtained by dividing the force required to stretch when a skin contact sheet having a certain width is stretched in a direction perpendicular to the width. cm). The stretching force measured at this time is the stretching force in the direction perpendicular to the width. Here, the “certain width” may be the width in the width direction or the width in the longitudinal direction of the skin contact sheet. Accordingly, when the “certain width” is the width in the skin contact sheet width direction, the extending direction is the skin contact sheet longitudinal direction, and when the “certain width” is the skin contact sheet longitudinal direction, The extending direction is the skin contact sheet width direction. The length of the “certain width” is not particularly limited. If the region to be measured and the extending direction are specified, the length in the direction perpendicular to the extending direction in the region is obtained.

  “Skin contact sheet is fully extended” means that the skin contact sheet is stretched and then returned to the original shape (length) of the sheet material (non-woven fabric, etc.). Say. Therefore, a state where the sheet material is further extended so as to be larger than the original shape is not included. The stretching force is measured by a tensile tester, and the strength of the stretched skin contact sheet is measured.

  As the tensile tester, Toyo Seiki Seisakusho Co., Ltd., trade name “Strograph”, or Orientech Co., Ltd., trade name “Tensilon” can be used. And it is set as the strength before the sheet is stretched and the strength of the nonwoven fabric appears. When measuring the stretching force, a region to be measured is cut out to be a measurement sample, and stretched in a direction perpendicular to the “certain width” to measure the stretching force.

  For example, when measuring the stretching force of the stretchable region or the non-stretchable region, the region to be measured is cut out from the skin contact sheet and used as a measurement sample. And when measuring the stretching force in the width direction, the stretching force is measured by grasping both ends in the width direction (direction corresponding to the width direction of the skin contact sheet) and extending in the width direction. When measuring the stretching force in the longitudinal direction, the stretching force is measured by grasping both ends in the longitudinal direction (the direction corresponding to the longitudinal direction of the skin contact sheet) and extending in the longitudinal direction.

[1-1] Skin contact sheet:
The skin contact sheet is a member for separating the wearer's skin and the top sheet, and is a sheet-like member that is disposed above the top sheet and in which a fecal passage opening that allows passage of feces is formed. As described above, the skin contact sheet used in the disposable diaper of the present invention is disposed so that the front end portion is located above the crotch portion of the top sheet and the rear end portion is located above the back body of the top sheet. It is a half-size skin contact sheet.

  By providing this skin contact sheet, the skin contact sheet (for example, the buttocks) is first brought into contact with the skin contact sheet, so that the top sheet disposed below the skin contact sheet is in direct contact with the wearer's buttocks. It becomes difficult. That is, a wearer's buttocks and a top sheet are separated. In addition, a shielding layer called a skin contact sheet is interposed between the top sheet and the buttocks of the wearer. Therefore, even if the stool remains on the top sheet, there is an effect of greatly reducing the chance that the stool and the wearer's buttocks 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 is preferably a breathable sheet. Thereby, it is possible to further suppress the portion (skin) that the skin contact sheet comes into contact with from being steamed, and to suppress the occurrence of skin troubles.

  As shown in FIG. 2, the skin contact sheet 24 is formed with a stool passing opening 26 so as to pass the stool excreted by the wearer. By adopting such a structure, the feces excreted by the wearer pass through the fecal passage opening 26 and fall onto the top sheet 18, and the feces and the wearer's skin are in direct contact with each other. Can be greatly reduced.

  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 stool passage opening, and the star slit once again passes the stool that has passed through the stool passage opening and dropped onto the top sheet. There is an advantage that it can be effectively prevented from being exposed from the fecal passage opening and contaminating the wearer's buttocks. The size of the holes and slits constituting the feces passage opening may be appropriately determined in consideration of the function of “passing feces”.

  For example, the disposable diaper 1 shown in FIG. 2 is an example in which an elliptical opening having the longitudinal direction of the diaper as the major axis direction is formed as the fecal passage opening 26 of the skin contact sheet 24. The fecal passage opening 26 is preferably located at the center of the skin contact sheet 24 in the width direction. Further, the arrangement of the stool passage opening 26 in the longitudinal direction of the skin contact sheet 24 is not particularly limited as long as the stool excreted by the wearer can pass therethrough.

  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.

  The size of the stool passage opening 26 is not particularly limited as long as it is a size that allows the stool to pass through. For example, in the case of L size for infants (length in the longitudinal direction of about 420 mm), the length of the stool passage opening 26 (length in the longitudinal direction of the skin contact sheet 24) is preferably 50 to 150 mm, and the width direction About length, 1-100 mm is preferable.

  In the present invention, at least a part of the outer edge of the stool passage opening 26 of the skin contact sheet 24, for example, in the vicinity of the central portion in the longitudinal direction, a stretchable region 30 having a stretching force in the width direction and / or the longitudinal direction is formed. Has been. As a result, when the disposable diaper 1 is attached to the wearer, the portion of the skin contact sheet 24 where the stool passing opening 26 is formed is brought into close contact with the wearer without being loosened, so that the stool passes the stool passing opening. It is possible to effectively prevent the stool from passing over and dropping onto the top sheet and staying on the skin contact sheet. The stretching force in the width direction of the stretchable region 30 is preferably 2 to 20 (g / cm), and more preferably 5 to 10 (g / cm).

  Further, in the present invention, as described above, at least the front end portion side of the stretchable region 30, specifically, for example, the front end portion of the skin contact sheet 24 has a stretch force in the width direction and the longitudinal direction. There is no non-stretchable region 31. The stretching force of the non-stretchable region 31 is 0 (g / cm). By forming such a non-stretchable region 31, no gathers are formed in the non-stretchable region 31, and it is possible to suppress pain and the like due to a region corresponding to the crotch part of the skin contact sheet 24 and skin troubles. Further, as described above, the non-stretchable region 31 is preferably formed with no gathers and less irregularities, and more preferably formed in a planar shape. The term “planar” means that no gathers are formed on the sheet material and the sheet material is flat.

  FIG. 4 is a plan view schematically showing a skin contact sheet used in the disposable diaper of the present embodiment. In the present embodiment, as shown in FIG. 4, the non-stretchable region 31 is formed at least on the front end side of the stretchable region 30. Thereby, when a wearer wears the disposable diaper of this embodiment, a non-stretchable region will contact a wearer's crotch part, and it becomes possible to control skin trouble etc. effectively.

  In the present embodiment, as shown in FIG. 4, the elastic contact member (opening elastic member) 28 is disposed in a specific position of the skin contact sheet 24 so as to be extendable and contractible, whereby the feces passage opening of the skin contact sheet 24. A stretchable region 30 having a stretching force in the width direction and / or the longitudinal direction is formed on at least a part of the outer edge of the portion 26, and the stretchable elastic material 28 is not disposed at least on the front end side of the stretchable region 30. By configuring as described above, the region is defined as a non-stretchable region 31.

  In other words, in the present embodiment, for example, the two opening stretchable members 28 (28a, 28b) are opened for passing the stool so as to extend in the longitudinal direction from the rear end portion to the front end portion of the skin contact sheet 24. The stretched region 30 is formed along at least a part of the outer edge of the portion 26 in an extended state, and at least a part of the outer edge of the feces passage opening 26 is formed. Under the present circumstances, you may arrange | position the two opening part expansion-contraction materials 28 so that it may have a width direction component in at least one part. And the area | region where the opening part expansion-contraction material 28 is not arrange | positioned is provided in the front-end part side of the skin contact sheet 24, and the non-expanding-contraction area | region 31 is formed.

  In addition, as a method of forming a non-stretchable region, (1) a method of cutting the arranged stretchable material at one or a plurality of locations so that stretchability cannot be expressed, and (2) fixing the stretchable material to the skin contact sheet At this time, the adhesive is applied to the region behind the non-stretchable region, while the stretchable material is fixed so that the adhesive is not applied to the non-stretchable region. Thereafter, when the skin contact sheet is cut to a predetermined size, the elastic material is cut at the same time, and the elastic material is shrunk to the rear area (back side) from the non-elastic area, (3) For example, a method of giving a sheet with rigidity so that it cannot be expressed.

  For example, the non-stretchable region 31 is arranged so that two opening stretchable members are not connected on the front end side of the skin contact sheet 24 (specifically, in front of the fecal passage opening 26). It may be formed, or in the longitudinal direction while crossing the two opening stretchable members on the front end side of the skin contact sheet 24 (specifically, in front of the fecal passage opening 26) It may be formed by being arranged so as to extend and then cutting at the intersection and snapping back. Moreover, the non-stretchable region may be formed by adding a sheet material such as a non-woven fabric to the intersection and pasting the stretchable force due to the opening stretchable material.

  Although not particularly limited, in the disposable diaper of the present embodiment, the width direction length of the non-stretchable region is preferably 10 to 80% of the width of the skin contact sheet, and 20 to 50%. More preferably. Moreover, it is preferable that a non-stretchable region is formed at least in the middle part of the width of the skin contact sheet. This makes it possible to maintain the state where the non-stretchable region is in contact with the inseam of the wearer even when the skin contact sheet is displaced in the left-right direction of the wearer, and can more effectively suppress skin troubles. It becomes.

  The disposable diaper equipped with a skin contact sheet makes it easier for stool to pass through the stool passage opening as the skin contact sheet comes into close contact with the wearer's body, reducing the chance of contact between the stool and the wearer's skin It becomes easy to demonstrate. However, the better the adhesion between the skin contact sheet and the wearer's body, the more likely the skin contact sheet and the wearer's skin become moistened by sweat or the like.

  In order to eliminate such a situation, the skin contact sheet used in the disposable diaper of the present invention has a region (rear end portion) located on the rear end side in the longitudinal direction of the skin contact sheet 24 as shown in FIG. The side region 51 is preferably a region having no stretching force in the width direction and the longitudinal direction. Thus, by making the rear end side region 51 of the skin contact sheet 24 a region that does not have the stretching force in the width direction and the longitudinal direction, the skin contact sheet is worn in the region that does not have the stretching force. It is possible to improve air permeability without being in close contact with a person's skin, and to suppress skin troubles.

  As shown in FIG. 5, in order to make the rear end side region 51 of the skin contact sheet 24 a region that does not have the stretching force in the longitudinal direction and the width direction, the rear end side region 51 has an opening and contraction. Preferably no material is provided. The opening stretchable material 28 (28a, 28b) is preferably arranged so as to extend in the longitudinal direction along the side edge of the fecal passage opening 26 in the skin contact sheet 24. Thus, although it is preferable to use a linear elastic elastic material as the opening elastic material, the sheet material itself constituting the skin contact sheet may have a structure having elasticity.

  In the present invention, two regions (side edge side regions) 50 (50a, 50b) extending in the longitudinal direction along both widthwise end portions of the skin contact sheet 24 shown in FIG. A region having no longitudinal stretching force is preferred. Thereby, air permeability can be further improved, and skin trouble can be further suppressed. And the width direction length per one side of each side edge part side area | region which does not have a stretching force is 2.5 to 25% of the width | variety of the whole skin contact sheet (width direction length of a skin contact sheet). It is preferable that it is 5 to 10%. That is, when the both side edges are combined, it is preferably 5 to 50%, more preferably 10 to 20%. By setting the side edge portion side region in such a range, it is possible to more favorably maintain a balance between adhesion to the wearer's body and prevention of skin trouble.

  Further, the skin contact sheet 24 shown in FIG. 6 has a plurality of stretchable materials (opening stretchable materials) 28 (28 c) extending in the width direction over the entire longitudinal direction of the skin contact sheet 24. On the front end side of the skin contact sheet 24, the opening stretchable material 28c is disposed with a gap therebetween. The interval portion is a non-stretchable region 31. In the disposable diaper of the present embodiment, since the skin contact sheet 24 is formed in this way, a large gather is formed in the non-stretchable region 31 on the front end side of the skin contact sheet 24 when the disposable diaper is attached to the wearer. Therefore, it can be flat and can effectively suppress pain and skin troubles caused by the portion corresponding to the crotch part of the skin contact sheet.

  The arrangement pattern of the opening stretchable material is preferably the above pattern, but is not particularly limited as long as a non-stretchable region can be formed on the front end side of the skin contact sheet.

  Further, when the opening stretchable material is arranged so as to extend in the longitudinal direction of the diaper as shown in FIG. 4, the opening stretchable material is continuously arranged, so that it is easy to continuously manufacture disposable diapers. It is preferable.

  If the opening stretchable material is arranged as described above, tension is applied to the skin contact sheet, so that the entire skin contact sheet can be firm. Therefore, it is possible to prevent the skin contact sheet from falling to the top sheet side, and there is an advantage that the skin contact sheet can easily come into contact with the wearer's skin. Further, when the opening stretchable material is disposed, the skin contact sheet is contracted, and the top sheet, the absorbent body, and the back sheet can act to bend downward (exterior member side). Therefore, the skin contact sheet can be kept floating from the top sheet, and the skin contact sheet and the top sheet can be reliably separated from each other.

  As the opening stretchable material disposed in the skin contact sheet, stretchable materials that have been used in conventional disposable diapers can be suitably used. Specifically, thread rubber made of an elastic material such as natural rubber or synthetic rubber (urethane rubber, etc.), flat rubber, etc., stretchable net, stretchable film, stretchable foam (urethane foam, etc.) and the like can be mentioned.

  When the opening stretchable member is disposed along the opening, a contraction force in the longitudinal direction is generated around the opening. The contraction force in the longitudinal direction is preferably 10 to 100 (gf), more preferably 20 to 80 (gf) in the stretchable region. By setting it as such a range, it becomes possible to give moderate elastic force to a skin contact sheet. For example, when natural rubber is used, one having a thickness of 0.2 to 0.25 mm and a width of 1.6 to 2.4 mm is 150 to 300% (a natural length of 1.5 to 1.5%). (3 times) is preferably stretched and fixed. When urethane rubber is used, it is preferable to use 2 to 3 thread rubbers having a thickness of about 620 Dtex and extend them to 200 to 300% and arrange them in parallel.

  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 to form a gather on the sheet material in order to exert sufficient stretching force on the skin contact sheet. For example, when the opening stretchable material is natural rubber or synthetic rubber, it is preferably fixed in a stretched state of 110 to 400%, and more preferably fixed in a stretched state of 200 to 300%. When the material is natural rubber, it is preferably stretched and fixed to 150 to 300% as described above. A sufficient stretching force can be applied to the skin contact sheet by fixing it in such a stretched state.

  The arrangement method of the opening stretchable material disposed in the skin contact sheet is not particularly limited. For example, as in the disposable diaper 1 illustrated in FIGS. 1 to 3, the skin contact sheet 24 is composed of two sheets (upper sheet). 24a and liner sheet 24b) are bonded to each other, and extend in the longitudinal direction while intersecting the two opening elastic members 28 on the front end side of the skin contact sheet between the upper sheet 24a and the liner sheet 24b. It is preferable to form the opening stretchable members 28a and 28b by arranging them in a snap-back manner. Employing such an arrangement method is preferable because it can impart stretching force to the skin contact sheet with the minimum necessary stretching material.

  In addition, the skin contact sheet of the disposable diaper of this invention may consist of an elastic sheet | seat itself. Examples of such stretchable sheets include polyurethane, styrene-butadiene-styrene block copolymer (SBS), styrene-butadiene-ethylene-styrene block copolymer (SBES), and styrene-isoprene-styrene block copolymer ( Preferred examples include those having at least one layer each of an elastic sheet in which an elastomer such as SIS) is made into a sheet or net shape and a nonwoven fabric.

  By comprising in this way, the whole skin contact sheet becomes easy to closely_contact | adhere to skin, and it becomes difficult to rub. Further, since such a skin contact sheet does not require the use of an elastic material such as rubber thread, there is an advantage that even if the skin contact sheet and the skin are in close contact with each other, there is no trace of the elastic material on the skin. Moreover, since it is not necessary to arrange | position and fix an elastic material, there also exists an advantage that a manufacturing process becomes simple.

  Thus, when the skin contact sheet is formed from an elastic sheet, a non-elastic sheet that does not have an elastic force is attached to the front end side of the elastic region of the skin contact sheet, It is preferable that a non-stretchable region is formed by a portion where the non-stretchable sheet is attached.

  The skin contact sheet fixing method includes (1) a method of fixing the skin contact sheet so as to be sandwiched between the sheet material and the top sheet (or back sheet) constituting the three-dimensional gather, and (2) the three-dimensional gather. A method of fixing the skin contact sheet to a portion on the inner surface between the upper edge and the lower edge (standing line) of the three-dimensional gather can be exemplified. 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.

In Operation s discarded diapers, made from a breathable water repellent sheet, has a urine-feces separation wall that partitions the space formed between the skin contact sheet and the top sheet of the back portion side surface from the space of the front body side, the It may be formed by joining one end of the urine / feces separation wall to the front end portion of the skin contact sheet and hanging the other end to the surface of the top sheet.

In the disposable diaper of the present invention, the front end of the skin contact sheet is joined to the surface of the top sheet, and the space formed between the skin contact sheet and the back body side surface of the top sheet is the space on the front body side that have been separated from.

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

[1-2] Solid gathering:
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. The disposable diaper of the present invention preferably has at least a pair of three-dimensional gathers formed on both sides of the skin contact sheet. By forming this three-dimensional gather, urine is excreted on the skin contact sheet, and even if urine diffuses along the skin contact sheet, the three-dimensional gather becomes a breakwater, and from the opening around the leg of the diaper, etc. Leakage (so-called “lateral leakage”) can be effectively prevented.

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

  As the sheet material constituting the three-dimensional gather, it is preferable to use a water-repellent material from the viewpoint of improving the leak-proof property of the three-dimensional gather. Examples of the water repellent material include a breathable water repellent sheet.

  The three-dimensional gather may be formed by folding back the top sheet or the back sheet of the absorbent main body, but it is preferable to form a sheet material completely separate from these. For example, the disposable diaper 1 shown in FIG. 2 and FIG. 3 has a pair of three-dimensional structures by sticking sheet materials 32a and 32b completely different from the top sheet 18 and the back sheet 20 to both side edges of the absorbent main body 14. This is an example in which gathers 46a and 46b are formed.

  As the three-dimensional gather stretchable material, the same stretchable material as the already described opening stretchable material can be used. One or more three-dimensional gather elastic materials may be arranged for one three-dimensional gather. There is no particular limitation on the arrangement position. For example, it may be arranged in the vicinity of the lower end edge (standing line) of the three-dimensional gather, or between the upper end edge and the lower end edge (standing line) of the three-dimensional gather, but in order to improve the standing property of the three-dimensional gather, It is preferable to arrange one or a plurality of opening elastic members near the upper edge of the three-dimensional gather.

  For example, the disposable diaper 1 shown in FIGS. 2 and 3 is an example in which a three-dimensional gather expansion / contraction material 36 is disposed in the vicinity of the upper end edge 34 of the three-dimensional gathers 46a, 46b, and ends of the sheet materials 32a, 32b (three-dimensional gathers 46a, 46b, 46b, the end corresponding to the upper end edge 34) is folded back, and the two three-dimensional gather elastic members 36a, 36b or the three-dimensional gather elastic members 36c, 36d are disposed between the folded portions.

  The height of the three-dimensional gather (length from the lower end edge to the upper end edge) is preferably 5 to 80 mm, and more preferably 10 to 40 mm. In addition to being able to ensure a sufficient leak-proof effect by setting it to 5 mm or more, by making it 80 mm or less, the three-dimensional gather covers the surface of the skin contact sheet or the top sheet, and this impedes the absorption effect. Can be prevented.

  There are three types of three-dimensional gathers: (1) Inverted gathers that incline toward the inner side of the diaper, (2) Outer gathers that incline toward the outer side of the diaper, and (3) A bent portion at a part in the height direction. And three-dimensional gathers (C-folded gathers, Z-folded gathers, etc.) in which folded portions are formed. Of these, inward gathering is preferable in terms of high leakage prevention. For example, the disposable diaper 1 shown in FIG. 2 and FIG. 3 is an example in which the three-dimensional gathers 46a and 46b are inverted and gathered.

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

  For example, in the case of the disposable diaper 1 shown in FIGS. 2 and 3, the skin contact sheet 24 is disposed up to both side edges of the absorbent main body 14, and the three-dimensional gathers 46 a and 46 b are connected to both side edges of the skin contact sheet 24. That is, it is an example formed along both side edges of the absorbent main body 14. In addition, although the disposable diaper 1 shown in FIG.2 and FIG.3 is an example in which the three-dimensional gathers 46a and 46b were formed over the both side edge whole region of the absorptive main body 14, from the objective of preventing the side leakage of urine, It should just be arrange | positioned at the part corresponded at least to the crotch part of a diaper.

  The three-dimensional gather is preferably formed so that the upper end edge thereof is disposed at a position higher than the surface of the skin contact sheet. By doing so, when urine is excreted on the skin contact sheet and the urine diffuses through the skin contact sheet, the urine can be prevented from leaking over the three-dimensional gather. .

  Examples of the method of arranging the upper end edge of the three-dimensional gather at a position higher than the surface of the skin contact sheet include a method of arranging the lower end edge of the three-dimensional gather on the surface of the skin contact sheet. That is, in the disposable diaper of the present invention, it is preferable that the lower end edge of the three-dimensional gather is disposed on the surface of the skin contact sheet. By doing so, the upper end edge of the three-dimensional gather is surely arranged at a position higher than the surface of the skin contact sheet. At this time, by appropriately adjusting the height of the three-dimensional gather according to the surface height of the skin contact sheet, it is possible to more reliably prevent a situation where urine leaks over the three-dimensional gather and leaks outside.

  For example, the disposable diaper 1 shown in FIG. 3 fixes the lower end edge of the three-dimensional gathers 46a and 46b to the skin contact by fixing the skin contact sheet 24 so as to be sandwiched between the bonded portions of the three-dimensional gathers 46a and 46b and the top sheet 18. This is an example in which the upper end edge 34 of the three-dimensional gathers 46 a and 46 b is arranged at a position higher than the surface of the skin contact sheet 24. In the present specification, the “lower edge of the three-dimensional gather” means a fixed end of the three-dimensional gathers 46a and 46b, that is, a portion of the upright line 38, as shown in FIG.

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

[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. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the lower surface side needs to absorb the wearer's urine.

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

  The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials. For example, in a tape-type diaper described later, a top sheet (center sheet) made of a liquid-permeable material is disposed at the center of the diaper, and the side flap portion of the diaper is resistant to liquid permeation. A form in which a top sheet (side sheet) made of a water-repellent material is disposed 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 FIG. 3 sandwiches the absorbent body 22 between the top sheet 18 and the back sheet 20 and seals the peripheral edge of the absorbent body 22, so that the gap between the top sheet 18 and the back sheet 20 is achieved. It is the example which comprised the absorptive main body 14 of the structure where the absorber 22 was interposed.

  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 to 3, the exterior member 16 is composed of two non-woven fabrics, and the leg elastic member 40, the waist elastic member 42, and the belly elastic member between the two non-woven 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, 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.

[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 two opening stretchable members in a predetermined pattern. The upper sheet 24a is configured to cover only the center portion of the liner sheet 24b and to expose both side edges of the liner sheet 24b. Further, as shown in FIG. 4, the two opening elastic members intersect on the front end side with respect to the feces passage opening 26 to be formed later and surround a part of the periphery of the feces passage opening. Arrange in a simple pattern.

  Next, a fecal passage opening 26 is formed in the bonded liner sheet 24b and upper sheet 24a. And the intersection part of the said opening part expansion-contraction material 28 is cut | disconnected, and it snaps back. Thereby, the opening elastic members 28a and 28b are formed, and the skin contact sheet 24 having a two-layer structure is obtained. It is preferable to fix the tip part of the opening stretchable member snapped back with an adhesive or the like. This snapback portion becomes a non-stretchable region. Further, a manufacturing method may be employed in which two opening stretchable members are provided on the upper surface of the liner sheet 24b from the beginning so as not to snap back. The snapback may be performed before the feces passage opening 26 is formed. Further, the non-stretchable region may be formed by attaching a non-stretchable sheet.

[2-3] Production of solid gathers:
One end of the sheet material 32a (32b) is folded, and the three-dimensional gathers 46a (46b) are bonded together with the two three-dimensional gather elastic members 36a, 36b (36c, 36d) sandwiched between the folded portions. Get.

[2-4] Attaching skin contact sheet etc. to absorbent main body:
After the skin contact sheet 24 (liner sheet 24b) is bonded to the surface of the top sheet 18 constituting the absorbent main body 14, the side edges of the absorbent main body 14 and the skin contact sheet 24 (liner sheet 24b) are sandwiched. The solid gathers 46a and 46b are bonded together.

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

[2-6] Manufacture of disposable diapers:
The absorbent main body 14 is disposed and fixed near the crotch part of the exterior member 16. Next, the absorbent body 14 is turned inside, and the front body 2 and the back body 6 are folded in two so that the front body 2 and the back body 6 are matched, and the front body 2 and the back body 6 are joined by means such as heat sealing to form the joint 8. By doing, the disposable diaper 1 shown in FIGS. 1-3 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 skin contact sheet is above the surface of the top sheet, specifically, the front end is above the crotch of the top sheet and the rear end is above the back body of the top sheet. By arrange | positioning so that it may be located in, it can enjoy the effect of the disposable diaper of this 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 is particularly suitable as a disposable diaper for infants, because the excreted stool is less likely to come into direct contact with the wearer's skin and there is little stool return or urine return. Can be used.

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 plan view which shows the skin contact sheet used for one Embodiment of the disposable diaper of this invention. It is a schematic plan view which shows the skin contact sheet used for other embodiment of the disposable diaper of this invention. It is a schematic plan view which shows the skin contact sheet used for other embodiment of the disposable diaper of this invention.

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: stool passage opening, 28, 28a, 28b, 28c: opening stretchable material, 30: stretchable region, 31: non-stretchable region, 32, 32a, 32b: sheet material, 34: upper edge, 36, 36a 36b, 36c, 36d: Three-dimensional gather elastic material, 38: Standing line, 40: Elastic material around leg, 42: Elastic material around waist, 44: Elastic material around belly, 46, 46a, 46b: Three-dimensional gather, 50: Side edge Side region 51 rear end side region.

Claims (5)

It is formed from each part of the front body, the crotch, and the back body,
An absorbent body, a top sheet that is at least partially made of a liquid-permeable material and arranged to cover the upper surface of the absorbent body, and a liquid-impermeable material that covers the lower surface of the absorbent body An arranged back sheet, and a stool passing opening is formed, and a skin contact sheet arranged above the top sheet,
The skin contact sheet is disposed such that the front end is located above the crotch of the top sheet and the rear end is located above the back body of the top sheet,
The skin contact sheet has an opening stretchable material along at least a part of the outer edge of the stool passage opening and extending in the longitudinal direction from the rear end portion to the front end portion of the skin contact sheet. Are continuously disposed, and at least a part of the outer edge of the stool passage opening of the skin contact sheet is formed with a stretch region having a stretch force in the width direction and / or the longitudinal direction, and from the stretch region Also at least on the front end side and continuously extending in the longitudinal direction from a part of the front end of the stool passing opening to a part of the front end of the skin contact sheet, having a stretching force in the width direction and the longitudinal direction. A non-stretchable region is formed, and the front end of the skin contact sheet is bonded to the surface of the top sheet, and the skin contact sheet and the front Disposable diaper space formed between the body-side surface of the topsheet have been separated from the space of the front body side. The skin contact sheet is one in which an opening stretchable material is arranged in an expanded state along at least a part of the outer edge of the stool passing opening,
The non-stretchable region is formed by a portion where the opening stretchable material is cut and the opening stretchable material is cut at a front end side of the skin contact sheet with respect to the stretchable region. The disposable diaper described. The skin contact sheet is one in which an opening stretchable material is arranged in an expanded state along at least a part of the outer edge of the stool passing opening, or a stretchable sheet,
A non-stretchable sheet that does not have stretchability is attached to the front end side of the skin contact sheet from the stretchable area, and the non-stretchable area is formed by a portion where the non-stretchable sheet is stuck. The disposable diaper according to claim 1.   The disposable diaper according to any one of claims 1 to 3, wherein a length in the width direction of the non-stretchable region is 10 to 80% of a width of the skin contact sheet.   The disposable diaper according to any one of claims 1 to 4, wherein at least a pair of three-dimensional gathers that are three-dimensionally standing leakage preventing walls are formed on both sides of the skin contact sheet.