JP5525255B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper.

When urine and stool are excreted during wearing of disposable diapers, they spread from the part arranged in the crotch part of the wearer to the part located on the wearer's dorsal or ventral side. Depending on the elapsed time from excretion, when the disposable diaper is removed, there are many portions that are not soiled by excrement in the portion located on the abdomen or back side of the wearer.
In such a case, if only the part soiled by the excrement can be separated and replaced, there is no waste and the amount of waste is reduced.
Patent Document 1 includes an annular waistline portion disposed around the wearer's waist and a crotch portion extending from the wearer's back to the abdomen via the crotch and connected to the waistline, the crotch portion being the waistline A pants-type wearing article that can be detachably attached to is described.
Patent Document 2 describes that a pad is placed on the inner surface of a diaper cover and worn on a wearer.

JP 2008-36019 A JP 2005-168725 A

However, in the pants-type wearing article of Patent Document 1, urine and soft stool easily move from the crotch part to the annular waistline part, and the crotch part is replaced by a guardian or caregiver judging that it is an appropriate replacement time. However, at that time, many cases occur where the waistline is already dirty with excrement. Therefore, it is necessary to replace the waistline part with the crotch part or to endure the dirty waistline part for continued use. Frequent replacement of the waistline is not preferable in terms of effective use of resources, and continued use of the dirty waistline is not preferable in terms of skin trouble and hygiene.
In the technique of Patent Document 2, while changing the pad, the diaper cover can be used repeatedly, but in order to change the pad, the diaper cover must be removed from the wearer.

  The present invention relates to a disposable diaper in which only the crotch portion can be replaced without removing the back side portion and the abdominal side portion from the wearer, and the replacement frequency of the back side portion and the abdominal side portion can be greatly reduced.

  The present invention is a disposable diaper in which a dorsal side portion arranged on the wearer's back side and an abdominal side portion arranged on the wearer's ventral side are formed in a ring shape in advance or can be connected in a ring shape. A crotch part disposed in the crotch part of the wearer is detachably connectable to the back side part and the abdomen side part, and the crotch part comprises an absorber, a pair of leg gathers, and A pair of side three-dimensional gathers formed at positions on the inner side in the width direction than the pair of leg gathers, and at least one end side of the crotch part in the front-rear direction has a tack part in which the crotch part is folded in the width direction The present invention provides a disposable diaper which is formed and side solid gathers are close to each other.

  According to the disposable diaper of the present invention, it is possible to replace only the crotch without removing the back side and the abdomen from the wearer, and it is possible to greatly reduce the replacement frequency of the back side and the abdomen. It is.

FIG. 1 is a perspective view showing a disposable diaper according to a first embodiment of the present invention, in which a crotch portion is connected to a back side portion and an abdominal side portion. FIG. 2 is a perspective view showing the disposable diaper of the first embodiment, and shows a state where the crotch part is separated from the back side part and the abdominal side part. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a plan view showing the crotch manufacturing intermediate in the first embodiment. FIG. 6 is a view showing a cross section (cross section taken along the line VI-VI in FIG. 5) along the horizontal direction of the portion having the crotch tack portion. FIG. 7: is a top view which shows the crotch manufacturing intermediate in the disposable diaper of 2nd Embodiment of this invention. FIG. 8: is a top view which shows the crotch manufacturing intermediate in the disposable diaper of 4th Embodiment of this invention. FIG. 9 is a side view showing still another embodiment of the present invention.

Hereinafter, the present invention will be described based on preferred embodiments thereof.
FIG. 1 is a perspective view showing a disposable diaper according to a first embodiment of the present invention, in which a crotch portion is connected to a back side portion and an abdominal side portion. Drawing 2 is a figure showing the disposable diaper of a 1st embodiment, and is a perspective view showing the state where the crotch part was separated from the back side part and the abdominal side part.

  As shown in FIG. 1, the disposable diaper 1 according to the first embodiment (hereinafter, also simply referred to as diaper 1) is arranged on the back side 2 disposed on the back side of the wearer when worn, and on the abdomen side of the wearer. And a crotch part 4 disposed in the crotch part of the wearer. As shown in FIG. 1, in a state where the back side part 2, the abdominal side part 3 and the crotch part 4 are connected, the direction from the back side part 2 through the crotch part 4 to the abdominal side part 3 is the front-rear direction (X direction in the figure). Hereinafter, the direction perpendicular to the front-rear direction will be referred to as the width direction (Y direction in the figure, hereinafter also referred to simply as the Y direction).

  A pair of fastening tapes 21 and 21 are provided at both ends of the back side 2 in the Y direction, and the pair of fastening tapes 21 and 21 are fixed to the outer surface (non-skin contact surface) of the abdomen 3. A possible landing tape 31 is provided. The dorsal side portion 2 and the abdominal side portion 3 can be connected in an annular shape by fastening a pair of fastening tapes 21 to the landing tape 31. This connection is usually performed when the diaper 1 is worn in the same manner as a deployable disposable diaper.

  As shown in FIG. 3, the back side portion 2 includes a liquid-permeable top sheet 22, a liquid-impermeable or water-repellent back sheet 23, and a liquid-holding absorber 24 sandwiched between both sheets. ing. Similarly to the back side portion 2, the ventral side portion 3 has a liquid-permeable top sheet 32, a liquid-impermeable or water-repellent back sheet (not shown), and a liquid retaining property sandwiched between both sheets. An absorber 34 is provided. In addition, elastic members 25 and 35 that expand and contract in the Y direction are disposed on the waist side end portions disposed on the wearer's waist portion in the back side portion 2 and the abdominal side portion 3.

  As shown in FIG. 2, the crotch part 4 has a tack part 4 </ b> R in which the crotch part 4 is folded in the width direction at one end of the back side part 2 in the front-rear direction (X direction). At one end of the crotch part 4 on the side of the abdominal side 3 in the front-rear direction (X direction), the crotch part 4 has a tack part 4R folded in the width direction.

The crotch part 4 includes fastening means 41 for detachably connecting the crotch part 4 to the back side part 2 and the abdomen side part 3 at both ends in the front-rear direction (X direction).
As the fastening means 41, an adhesive part formed by coating with a hot melt adhesive or the like, a male member of a mechanical surface fastener, or the like can be preferably used. In the case where the fastening means 41 is an adhesive part, a fastening area (not shown) for fastening the fastening means 41 on the back side part 2 and the abdominal side part 3 is the fastening area. For example, it is preferable to indicate the area to be secured by color coding, surroundings, characters, or the like. On the other hand, when the fastening means 41 is a male member of a mechanical hook-and-loop fastener, a male region is not provided in a to-be-attached region (not shown) for fastening the fastening means 41 on the back side portion 2 and the ventral side portion 3. It is preferable to arrange a female member of a mechanical hook-and-loop fastener having a loop or the like with which the protrusion of the member can be engaged. Moreover, the outer surface of the back side part 2 or the abdominal side part 3 can be comprised with the nonwoven fabric rich in engagement property, and the male member of a mechanical hook-and-loop fastener can also be engaged with this nonwoven fabric. Also in this case, the specific area where the male member of the mechanical hook-and-loop fastener should be fixed is indicated by color coding, surrounding, letters, etc. so that the fixed area (not shown) for fixing the fixing means 41 can be understood. It is preferable to show.

  As shown in FIGS. 3 and 4, the crotch part 4 includes a liquid-permeable top sheet 42, a liquid-impermeable or water-repellent back sheet 43, and a liquid-retaining absorbent body 44 sandwiched between both sheets. It has. The back sheet 43 in the diaper 1 is a laminated sheet in which a moisture permeable or non-moisture permeable resin film 43a and a nonwoven fabric 43b are bonded together. However, it is needless to say that the back sheet 43 made only of the resin film 43a may be used. is there.

  Further, as shown in FIGS. 2 and 4, the crotch part 4 has a pair of leg gathers 45, 45 in the vicinity of both ends in the Y direction. The leg gathers 45 and 45 are formed by fixing the elastic member 46 in an extended state between the back sheet 43 and the three-dimensional gather forming sheet 55 for the side three-dimensional gathers 51 and 52, respectively. The leg gathers 45 and the elastic members 46 each extend along the X direction.

  Further, as shown in FIGS. 2 and 4, the crotch part 4 has a pair of side three-dimensional gathers 51 and 52 at positions inside the pair of leg gathers 45 and 45 in the Y direction.

  The side three-dimensional gather 52 has a fixed end 56 extending along the X direction at a position slightly outward from the side edge of the absorber 44. The three-dimensional gather forming sheet 55 for the side three-dimensional gather is a member in which a portion located outward in the Y direction from the fixed end 56 and a portion located at both ends in the Y direction of the crotch part 4 are arranged below ( For example, it is joined to the top sheet 42, the back sheet 43, etc.) by a known joining means. And in the three-dimensional gather forming sheet 55, the portion located between the fixed portions 56 located on the inner side in the Y direction from the fixed end 56 (on the front-rear direction center line P side of the crotch part 4) and at both ends in the X direction, By contracting the elastic member 57 fixed to the sheet 55 in an extended state, the elastic member 57 stands up and separates from the surface sheet or the like to form the side three-dimensional gather 52. The side solid gathers 51 have the same configuration as the side solid gathers 52 except that the side solid gathers 51 are symmetrical with respect to the center line P in the front-rear direction of the crotch part 4. The front-rear direction center line P of the crotch part 4 is a center line extending in the front-rear direction (X direction) of the crotch part 4.

  The crotch part 4 has a tack part 4R in which the crotch part 4 is folded in the width direction at one end on the back side part 2 side in the front-rear direction (X direction). And thereby, the side solid gathers 51 and 52 in the one end part by the side of the back side 2 of the crotch part 4 are adjoining. Further, the crotch part 4 also has a tack part 4F in which the crotch part 4 is folded in the width direction at one end part on the abdomen side part 3 side in the front-rear direction (X direction). And thereby, the side solid gathers 51 and 52 in the one end part by the side of the stomach side 3 of the crotch part 4 are adjoining.

More specifically, as shown in FIG. 5, the crotch part 4A (hereinafter referred to as the crotch manufacturing intermediate) before forming the tack parts 4R and 4F is formed into a planar shape by extending the elastic members of the respective parts. In this state (hereinafter also referred to as “extended state”), it is rectangular.
In the crotch manufacturing intermediate 4A, the distance between the side three-dimensional gathers 51 and 52 is constant over the entire region of the crotch 4 in the front-rear direction.

The crotch part 4 in the diaper 1 of the present embodiment is in the vicinity of the end on the back side 2 side of the crotch manufacturing intermediate 4A and in the vicinity of the abdomen 3 side end of the crotch manufacturing intermediate 4A. The tack portions 4R and 4F are formed as follows.
The tack part 4R on the back side part 2 side is two V-shaped in the laminated body 10 composed of the top sheet 22 and the back sheet 23 extending from the edge of the absorbent body 4 in the front-rear direction (X direction). The triangular area 40A between the straight lines 40c and 40d is folded in half so that the center line 40b is a valley fold, and then the folded area 40A is integrated at the position of the straight lines 40c and 40d. And is fixed to the outer surface 10a of the other part of the laminate 10. Before the region 40A is folded in half, the adhesive 71 is applied to the region between the straight line 40c and the center line 40b and / or the region between the straight line 40d and the center line 40b. Before the bent region 40A is bent at the positions of the straight lines 40c and 40d, the adhesive 72 is applied to either or both of the two surfaces that face each other.

  The tack part 4F on the ventral part 3 side has the same configuration as the tack part 4R on the dorsal part 2 side, except that it is symmetric with respect to the center line Q in the width direction of the crotch part 4. Similarly to the tack portion 4R on the back side 2 side, the tack portion 4F on the ventral side 3 side is also folded in two at the position of the straight lines 40c and 40d after the region 40B is folded in half. It is formed by bending and fixing to the outer surface 10a of the other part of the laminated body 10.

And since the crotch part 4 in the diaper 1 of this embodiment has the tack part 4R of the said structure in the edge part by the side of the back side 2 of the front-back direction, the side solid gathers 51 and 52 are adjoining.
Here, the term “close” means that the distance between the edges on the free end 61 side of the side solid gathers 51 and 52 is at least the side of the side solid gathers 51 and 52 in the front-rear direction center of the crotch 4. It means that it is smaller than the width W1 (see FIG. 5) between the edges. In the diaper 1 of the present embodiment, the sheets on the free end 61 side of the side solid gathers 51 and 52 overlap each other at both ends in the front-rear direction of the crotch part 4 or the edges on the free end 61 side are abutted. It is in a state.
The distance W between the edge portions on the free end 61 side of the side three-dimensional gathers 51 and 52 at the end portion of the crotch portion 4 in the front-rear direction has a tack portion as shown in FIG. It is preferably 10 mm or less, more preferably a butted state (W = 0 mm) or a superposed state (W <0 mm), and still more preferably a butted state.

As shown in FIG. 1, the diaper 1 according to the first embodiment has a crotch portion 4 connected to the back side portion 2 and the abdominal side portion 3 via fastening means 41 so that a normal unfolded shape is obtained. The disposable diaper can be worn on the wearer.
And, when processing urine and stool excreted during wearing, without removing the back side and the abdomen from the wearer, only the crotch is removed, and only the crotch is replaced with a new crotch. Can be replaced.

The loose stool or the like excreted in the crotch spreads in the front-rear direction and the width direction of the crotch, but in the diaper 1 of the first embodiment, a tack portion is formed on one end of the crotch 4 on the back side 2 side in the front-rear direction. 4R is formed so that the left and right side three-dimensional gathers 51 and 52 are close to each other. Therefore, the side three-dimensional gathers 51 and 52 become a three-dimensional barrier, and they are effectively prevented from spreading to the back side part 2 and soiling the back side part 2. Further, the absorbent body 44 in the vicinity of the tack portion 4R forms a deep recess having a concave shape toward the wearer's skin side by the side three-dimensional gathers 51 and 52, and the absorber 44 existing on the wall surface of the recess The liquid is effectively absorbed. Moreover, when the absorber 44 forms a dent, the space between the side three-dimensional gathers 51 and 52 and the surface of the dent also increases.
Therefore, it is effectively prevented that loose stool or the like spreads to the back side portion 2 and soils the back side portion 2, and the frequency of occurrence of a situation in which the back side portion 2 must be replaced together with the crotch portion 4 is reduced. Can be used effectively. Moreover, since the back side part 2 is hard to become dirty, it is not necessary to endure the dirty back side part 2 and to use it continuously.
Moreover, since the leg gathers 45 and 45 fit well around the legs of the wearer, leakage from the legs can be prevented.

Moreover, in the diaper 1 of 1st Embodiment, the tack part 4F is formed also in the other end side by the side of the abdominal side 3 of the crotch part 4 in the front-back direction, Thereby, right and left side also in this other end side The three-dimensional gathers 51 and 52 are close to each other.
Therefore, even if urine or the like excreted in the crotch spreads in the front-rear direction or the width direction of the crotch, the side solid gathers 51 and 52 serve as a solid barrier, and they spread to the ventral side 3. It is effectively prevented that the ventral part 3 is soiled. Further, the absorbent body 44 in the vicinity of the tack portion 4R forms a deep recess having a concave shape toward the wearer's skin side by the side three-dimensional gathers 51 and 52, and the absorber 44 existing on the wall surface of the recess The liquid is effectively absorbed. Moreover, when the absorber 44 forms a dent, the space between the side three-dimensional gathers 51 and 52 and the surface of the dent also increases.
Therefore, it is effectively prevented that urine or the like spreads to the ventral side portion 3 and soils the ventral side portion 3, and the frequency of occurrence of a situation in which the ventral side portion 3 must be replaced together with the crotch portion 4 is reduced. Can be used effectively. Further, since the abdominal side 3 is difficult to get dirty, it is not necessary to endure the dirty abdominal side 3 and continue to use it.

  The total length of the crotch part 4 in the front-rear direction (X direction) is 55 to 80% of the total length in the front-rear direction of the diaper in a state where the crotch part 4 is connected to the back side part 2 and the abdomen side part 3. It is preferably 60 to 70%.

Next, the disposable diaper of 2nd and 3rd embodiment of this invention is demonstrated.
About 2nd and 3rd embodiment, a different point from 1st Embodiment is demonstrated and description is abbreviate | omitted about the same point. Components similar to those in the first embodiment are denoted by the same reference numerals. Points that are not particularly described can be configured in the same manner as in the first embodiment.

FIG. 7 shows a state before the formation of the tack portions 4R and 4F at the crotch portion in the second embodiment. That is, the crotch manufacturing intermediate 4A ′ used in the second embodiment has V-shaped notches 44a and 44b at both ends in the front-rear direction (X direction) as shown in FIG. In such a crotch manufacturing intermediate 4A ′, the portions having the cutout portions 44a and 44b in the thickness direction are folded in the same manner as in the first embodiment, that is, the straight lines 40c and 40d are folded into two at 40b. Then, the crotch part which has the tack parts 4F and 4R in the diaper of 2nd Embodiment is formed by tilting the whole and fixing to the outer surface side of a diaper.
Also in the diaper of the second embodiment, by forming such a tack portion, a gap between a pair of side solid gathers at the end on the abdomen side and / or the end on the back side of the crotch Since the width is narrowed, a diaper having the same effects as those of the first embodiment can be obtained. In addition, since the absorber 44 is also present on the wall surface of the depression formed by the absorber 44 in the vicinity of the tack portion 4R, soft stool and urine transfer to the dorsal side 2 and / or ventral side 3 Can be more effectively prevented.

FIG. 8 shows a state of the crotch part according to the third embodiment before the tack portions 4R and 4F are formed. That is, as shown in FIG. 8, the crotch manufacturing intermediate 4A ″ used in the third embodiment has an end on the back side 2 side and an end on the abdominal side 3 side in the front-rear direction (X direction), respectively. In addition, it has dorsal or ventral three-dimensional gathers 53 and 54 that expand and contract in the lateral direction (Y direction) of the crotch 4.
A sheet 59 for forming a three-dimensional gather for backside or ventral three-dimensional gathers has a portion positioned outward in the X direction from the fixed end 58 and a portion positioned at both ends of the crotch 4 in the Y direction. It is joined to the member (for example, the surface sheet 42, the three-dimensional gather formation sheet 55, etc.) by a known joining means. Further, in the three-dimensional gather forming sheet 59, it is a portion located between the fixed portions existing on the inner side in the X direction from the fixed end 58 (on the width direction center line Q side of the crotch part 4) and at both ends in the Y direction. When the tack portions 4R and 4F are formed, the unfolded portion together with the region between the straight lines 40c and 40d stands apart from the surface sheet or the like by contraction of the elastic member 60 fixed to the sheet 59 in an extended state. Then, the dorsal or ventral three-dimensional gathers 53 and 54 are formed.
As shown in FIG. 8, the apex on the side of the center line Q in the width direction of the triangular region (the region between the straight lines 40 c and 40 d) that is folded to form the tack portion has not reached the arrangement position of the elastic member 60. Therefore, the free end 62 side of the dorsal or ventral three-dimensional gathers 53 and 54 is not folded into the tack portion when forming the tack portion.

  A part of the back side and / or ventral side three-dimensional gathers 53 and 54 in the width direction may be folded into the tack part, but the fixed end 58 side is folded together with the tack part, and the free end 62 side is not folded into the tack part. By providing the side and / or ventral side three-dimensional gathers 53 and 54, it is possible to prevent the liquid from transferring to the dorsal side portion 2 and / or the ventral side portion 3.

Explaining the forming material of each part in the diaper of each embodiment described above, as the top sheet 42, back sheet 43, absorber 44, three-dimensional gather forming sheets 55, 59, elastic members 46, 57, 60, etc. in each diaper In the conventional disposable diaper, various materials conventionally used as respective materials can be used without particular limitation.
For example, as the surface sheet 42, a nonwoven fabric by various manufacturing methods, a perforated film, a laminate of these, and the like can be used. As the back sheet 43, a moisture-permeable or non-moisture-permeable resin film, a laminate in which a nonwoven fabric is integrated with this, or the like can be used. As the absorbent body 44, a fiber aggregate (may be a non-woven fabric) made of pulp fibers or the like, or a material in which a highly water-absorbing polymer is held by tissue paper or a water-permeable non-woven fabric is used. Can do. Examples of the three-dimensional gather forming sheets 55 and 59 include water-repellent nonwoven fabrics (thermal bond nonwoven fabric, spunbond nonwoven fabric, spunbond-meltblown-spunbond nonwoven fabric, spunbond-meltblown-meltblown-spunbond nonwoven fabric, etc.) A laminate with a nonwoven fabric or the like can be used. Examples of the material of the elastic members 46, 57, and 60 include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, polyurethane, and the like. As a form, a thread-like (thread rubber or the like) or string-like (flat rubber etc.) having a rectangular, square, circular, or polygonal cross section, a multifilament type thread-like thing, or the like can be used.

  The present invention has been described above by showing some embodiments of the disposable diaper of the present invention. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. Is possible.

  For example, as shown in FIG. 9, the disposable diaper according to the present invention may have the dorsal side portion 2 and the ventral side portion 3 formed in an annular shape in advance. The back side part 2 and the abdominal side part 3 in the disposable diaper shown in FIG. 9 have substantially the same configuration as the part arranged around the wearer's waist in a normal pants-type disposable diaper. The back side portion and the ventral side portion that can be connected in a ring shape may have a rectangular shape in plan view.

Moreover, in the diaper of embodiment mentioned above, although the tack parts 4R and 4F were formed in the both ends of the back side part 2 side and the abdominal side part 3 side of the crotch part 4, the back side part 2 side Only the tack part 4R may be provided. In that case, a ventral side three-dimensional gather can be provided on the side of the ventral side 3 in the crotch part 4. The ventral three-dimensional gather may or may not have a portion that is folded into the tack portion.
When the fastening means 41 is continuously fixed in the width direction of the crotch manufacturing intermediate 4A ′ and the tack portion is formed, a part of the fastening means may be folded together with the sheet material to form the tack portion. it can

Further, the tack portions 4F and 4R may be maintained in a state folded by the adhesives 71 and 72, or maintained in a state folded only by the adhesive 71 or only by the adhesive 72. It may be a thing. Moreover, the tack parts 4F and 4R may maintain the folded state by means other than an adhesive. For example, the sheets may be joined by heat sealing, ultrasonic sealing, high frequency sealing, or the like.
Further, the adhesive 71 and / or the adhesive 72 may not reach the end edge of the crotch part 4 in the front-rear direction. The tack portions 4F and 4R can also be formed slightly apart from the front and rear end edges of the crotch portion 4.
Further, the notches 44a and 44b formed in the absorber 4 may be U-shaped instead of V-shaped. Further, instead of the V-shaped straight lines 40b and 40d, the inside of a U-shaped curve may be folded in half. Further, instead of folding the predetermined region in two, the tack portion can be formed by folding in three.

Moreover, in the diaper 1 of 1st Embodiment, the fastening means 41, such as a male part of an adhesion part or a mechanical hook-and-loop fastener, is provided in the crotch part 4 side, and this crotch part 4 is connected to the back side part 2 and the abdomen. Although it was made to attach detachably with respect to the side part 3, instead of this, on the back side part 2 and / or the abdominal side part 3 side, fastening means, such as a male part of an adhesive part or a mechanical hook-and-loop fastener, etc. It is also possible to provide the crotch part 4 with a to-be-attached region for fixing the fixing means.
Moreover, in the diaper 1 of 1st Embodiment, as shown in FIG. 3, the back side part 2 and the abdominal side part 3 were piled up on the skin contact surface side of the crotch part 4, and these were connected. Instead of this, the back side part 2 and / or the abdominal side part 3 may be overlapped on the non-skin contact surface side of the crotch part 4 to connect them. The same applies to other embodiments.

Moreover, in the crotch part in 1st-3rd embodiment, although the two elastic members were each distribute | arranged to the leg gather 45 and a pair of side solid gathers 51 and 52, respectively 1 or 3 or more arrangement | positioning May be. The elastic members disposed on the back side three-dimensional gather 53 and the ventral side three-dimensional gather 54 can also be one, two, or three or more, respectively.
Further, the three-dimensional gather forming sheet constituting the back three-dimensional gather 53 and / or the ventral three-dimensional gather 54 may be a laminated sheet in which two sheets are folded in two to form a two-layer structure. It may be a sheet made of a single sheet, excluding the arrangement site of the elastic member, such as a gathering sheet for gathering three-dimensional gathers. Further, as a three-dimensional gather forming sheet for side three-dimensional gathers, a laminated sheet in which two sheets are folded in two to form a two-layer structure, a laminated sheet having a three-layer structure or more, and the like can be used.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Back side part 21 Fastening tape 3 Abdominal side part 31 Landing tape 4 Crotch lower part 4A ', 4A "Crotch lower part production intermediate 4R Back part side tack part 4F Abdominal part side tack part 41 Fixing means 42 Top sheet 43 Back sheet 44 Absorber 45 Leg gather 46 Elastic members 51, 52 for forming leg gathers Side solid gather 56 Fixed end of side solid gather 61 Free end of side solid gather 55 For forming three-dimensional gather for side solid gather Seat 53 Backside gathers 54 Abdominal side gathers 58 Fixed end 62 of the backside or abdominal side gathers Free end 59 of the backside or abdominal side gathers 3D gathering sheet P for backside or ventral side gathers Centerline Q in the front-rear direction of the center part Centerline in the width direction of the crotch part

Claims (2)

A disposable diaper in which the back side portion arranged on the back side of the wearer and the abdominal side portion arranged on the abdomen side of the wearer are formed in a ring shape or can be connected in a ring shape,
The crotch part arranged in the crotch part of the wearer is detachably connectable to the back side part and the abdomen side part, and the crotch part includes an absorber, a pair of leg gathers, and a pair of legs. It has a pair of side solid gathers formed at a position on the inner side in the width direction from the gathers,
At least one end side in the front-rear direction of the crotch part is formed with a tack part in which the crotch part is folded in the width direction and the side solid gathers are close to each other,
The crotch part has a three-dimensional gather that expands and contracts in the lateral direction of the crotch part at the end part of the crotch part having the tack part, and the fixed gather side is folded together with the tack part. A disposable diaper whose free end is not folded into the tack portion .   The disposable diaper according to claim 1, wherein a notch portion is formed at an end portion of the absorbent body in the front-rear direction, and the tack portion is formed by folding a portion of the crotch portion having the notch portion.

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