JP2011136063A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper capable of exchanging only a crotch part without detaching a back part and an abdominal part from a wearer and capable of sharply reducing the replacement frequency of the back part and the abdominal part. <P>SOLUTION: In the disposable diaper wherein the back part 2 arranged on the back side of the wearer and the abdominal part 3 arranged on the abdominal side of the wearer are preliminarily formed in an annular state or made connectable in the annular state, the crotch part 4 arranged to the crotch of the wearer is made connectable with respect to the back part 2 and the abdominal part 3 in a freely detachable manner and has an absorber 44 and a pair of leg gathers 45 and 45. Three-dimensional gathers 51-54 are formed so as to surround the periphery of the crotch part 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

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.

JP 2008-36019 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.

  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. The 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 has an absorber and a pair of leg gathers. And a disposable diaper in which a three-dimensional gather is formed so as to surround the circumference of the crotch part.

  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. Drawing 2 is a figure showing the disposable diaper of a 1st embodiment, and is a top view showing the state where the crotch part was separated from the back side part and the abdominal side part. The crotch part in FIG. 2 shows a state in which the elastic member of each part is extended and expanded to the design dimension (same as the dimension when the flat member is expanded in a state where the influence of the elastic member is completely eliminated). . 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 top view which shows the crotch part in the disposable diaper of 2nd Embodiment of this invention. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7: is a top view which shows the crotch part in the disposable diaper of 3rd Embodiment of this invention. FIG. 8: is a top view which shows the crotch part in the disposable diaper of 4th Embodiment of this invention. 9 is a cross-sectional view taken along line IX-IX in FIG. FIG. 10: is a top view which shows the crotch part in the disposable diaper of 5th Embodiment of this invention. 11 is a cross-sectional view taken along line XI-XI in FIG. FIG. 12 is a cross-sectional view showing the vicinity of an end portion in the front-rear direction of the crotch part according to another embodiment of the present invention. FIG. 13 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 top 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 portion 4 has a rectangular shape in a state where the elastic members of the respective portions are extended to be flat (hereinafter also referred to as “extended state”). The crotch part 4 is provided with 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 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, it is preferable that the fastening areas 26 and 36 for fastening the fastening means 41 in the back side part 2 and the abdominal side part 3 are the fastening areas. It is preferable to make it understandable, 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, the attachment regions 26 and 36 for fastening the fastening means 41 in the back side portion 2 and the abdominal side portion 3 It is preferable to arrange a female member of a mechanical surface fastener having a loop or the like that can be engaged with the protrusion. 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 surface fastener should be fastened is indicated by color coding, surrounding, letters, etc. so that the fastened areas 26 and 36 where the fastening means 41 is fastened can be seen. It is preferable to keep it.

  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. Further, as shown in FIGS. 2 and 3, the crotch part 4 includes a back side solid gather 53 and a ventral side solid gather 54 in the vicinity of both ends in the X 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 back side three-dimensional gather 53 has a fixed end 58 extending along the Y direction at a position slightly outward from the end edge in the front-rear direction of the absorber 44. A sheet 59 for forming a three-dimensional gather for backside or ventral three-dimensional gathers has a portion positioned outward in the Y direction from the fixed end 58 and a portion positioned at both ends of the crotch 4 in the Y direction. The member (for example, the front sheet 42, the back sheet 43, the three-dimensional gather forming sheet 55, etc.) is joined by a known joining means. And, in the three-dimensional gather forming sheet 59, the portion located between the fixed portions 58 located on the inner side in the X direction from the fixed end 58 (the width direction center line Q side of the crotch part 4) and at both ends in the Y direction, The elastic member 60 that is fixed to the sheet 59 in a stretched state contracts and rises away from the surface sheet or the like to form the back side three-dimensional gather 53. The ventral side three-dimensional gather 54 has the same configuration as the back side three-dimensional gather 53 except that it is symmetrical with respect to the center line Q in the width direction of the crotch part 4. The center line Q in the width direction of the crotch part 4 is a center line extending in the width direction (Y direction) of the crotch part 4.

In the diaper 1 of the first embodiment, the pair of side three-dimensional gathers 51 and 52 and the dorsal and ventral three-sided gathers 53 and 54 are thus formed so as to surround the crotch part 4.
Further, as shown in FIGS. 2 and 4, the pair of side three-dimensional gathers 51 and 52 in the diaper 1 of the first embodiment is such that the free end 61 is inward of the fixed end 56 in the width direction (front-rear direction center line P side). 2), the back side three-dimensional gather 53 and the ventral side three-dimensional gather 54 are arranged so that the free end 62 is inward (in the width direction) from the fixed end 58, as shown in FIGS. It is formed so as to be located on the center line Q side).
Moreover, in the overlapping part of the side solid gathers 51 and 52 and the back side or ventral side solid gathers 53 and 54 in the four corners of the crotch part 4, the dorsal and ventral side gathers 53 and 54 are close to the skin. It overlaps to become.

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.
Urine and loose stool excreted in the crotch spread in the front-rear direction and the width direction of the crotch, but the three-dimensional gathers 51 to 54 are formed so as to surround the crotch 4, so that 2 and the back side part 3 and the ventral side part 3 are effectively prevented from spreading to the ventral side part 3.
Therefore, it is possible to reduce the frequency of occurrence of a situation where the back side part 2 and / or the abdominal side part 3 must be replaced together with the crotch part 4, and the resources can be effectively used. Moreover, since the back side part 2 and the abdominal side part 3 are hard to get dirty, it is not necessary to endure the dirty back side part 2 or the abdominal side part 3 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.

  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%.

The forming material of each part in the diaper 1 will be described. As the top sheet 42, the back sheet 43, the absorber 44, the three-dimensional gather forming sheets 55, 59, the elastic members 46, 57, 60, etc. Various materials and the like conventionally used as the material 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.

Next, the disposable diaper of 2nd-5th embodiment of this invention is demonstrated.
About 2nd-5th 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.

  As shown in FIG. 5, a pair of leg gathers 45, 45 and a pair of side solid gathers 51, 52 are formed on the crotch part 4A in the second embodiment, while the back solid gather and the ventral solid gather Is not formed. Further, one side three-dimensional gathers 51 and 52 in the crotch part 4A have overlapping portions 65 and 65 of three-dimensional gather forming sheets at or near both ends in the X direction of the crotch part 4A.

  Further, as shown in FIGS. 5 and 6, the side three-dimensional gathers 51 and 52 in the second embodiment are provided with a reduction portion 66 that reduces the width of the side three-dimensional gather between the fixed end 56 and the free end 61. Thus, the width of the crotch part 4A at the center in the front-rear direction is narrower than the width at both ends of the crotch part 4A in the front-rear direction. The reduced width portion 66 shown in FIG. 6 is a multilayer portion formed by picking up a part of the three-dimensional gather forming sheet 55 to form a laminated portion of the sheets and fixing the laminated state with an adhesive 66a. The multi-layered portion as the reduced width portion 66 may be formed so as to protrude toward the inner side (absorber side) in the Y direction of the crotch portion 4A, or may be formed so as to protrude outward. Alternatively, it may be formed so as not to protrude on either side. In addition, a multilayer portion in which the sheets 55 are laminated in three or more layers may be formed as the reduced width portion 66, or a configuration other than the multilayer portion may be formed as the reduced width portion 66. In addition, fixing of the stacked state of the sheets 55 in the multi-layer portion may be performed by means other than the adhesive 66a, for example, heat sealing, ultrasonic sealing, high frequency sealing, stitching, and a combination of these with an adhesive.

  As shown in FIG. 7, the crotch part 4B in the third embodiment is the same as the crotch part 4A in the second embodiment with the back side three-dimensional gather 53 and the ventral side three-dimensional gather 54 in the first embodiment. It has the structure provided in the same manner as in FIG.

The disposable diaper of 2nd and 3rd Embodiment is also the state which connected crotch part 4A, 4B to the back side part 2 and the abdominal side part 3 via the fastening means 41 similarly to the diaper 1 of 1st Embodiment. Use as
In the second embodiment, as shown in FIG. 5, the crotch 4 is surrounded by a pair of side solid gathers 51 and 52. Therefore, it is possible to effectively prevent urine, loose stool, etc. from spreading on the dorsal side 2 and the ventral side 3 and soiling the dorsal side 2 and the ventral side 3, and the same effect as in the first embodiment is achieved. The The crotch part 4A in the second embodiment has an advantage that it is not necessary to introduce an elastic member along the direction along the CD direction when the front-rear direction (X direction) is manufactured as the machine direction (MD direction).

  In the third embodiment, as in the second embodiment, the circumference of the crotch 4 is surrounded by a pair of side solid gathers 51 and 52, and the back solid gather 53 and the ventral solid gather 54 are provided. Have. Therefore, it is more effectively prevented that urine, loose stool or the like spreads to the back side portion 2 or the ventral side portion 3 and contaminates the back side portion 2 or the ventral side portion 3.

As shown in FIGS. 8 and 9, the crotch part 4C in the fourth embodiment includes a back side three-dimensional gather 53C and a ventral side three-dimensional gather 54C in a basic structure portion having substantially the same configuration as the crotch part 4A in the second embodiment. It has the structure which provided.
Further, the back side three-dimensional gather 53C and the ventral side three-dimensional gather 54C are each formed such that the free end 62 is positioned outward of the fixed end 58 in the Y direction.
More specifically, the back side three-dimensional gather 53C has a fixed end 58 that extends along the width direction (Y direction) at a position slightly outward from the end edge of the absorber 44 in the front-rear direction (X direction). ing. As shown in FIG. 9, the three-dimensional gather-forming sheet 59 for the back-side three-dimensional gather is folded back outward in the X direction in the vicinity of the fixed end 58. Both ends in the direction are fixed on the three-dimensional gather forming sheet 55 for side three-dimensional gathers at both ends in the Y direction of the crotch part 4C. The ventral three-dimensional gather 54C has the same configuration as the dorsal three-dimensional gather 53C except that it is symmetrical with respect to the center line Q in the width direction of the crotch 4.

According to the fourth embodiment, since the circumference of the crotch part 4 is surrounded by the pair of side solid gathers 51 and 52, urine, soft stool, etc. spread to the back side 2 and the abdominal side 3 and dorsal Staining the part 2 and the ventral part 3 is effectively prevented, and the same effect as in the first embodiment is achieved.
Further, since the back side three-dimensional gather 53C and the ventral side three-dimensional gather 54C are formed so that the free end 62 is positioned outward in the front-rear direction from the fixed end 58, urine, loose stool, and the like are present in the side three-dimensional gather 51. , 52 can be absorbed by spreading to the dorsal side 2 or ventral side 3 via the dorsal three-dimensional gather 53C or ventral three-dimensional gather 54C. Can be prevented.

As shown in FIGS. 10 and 11, the crotch part 4D in the fifth embodiment has a configuration in which a plurality of dorsal solid gathers 53 and ventral solid gathers 54 are provided on the crotch part 4A in the second embodiment. ing.
The back three-dimensional gather 53 in the fifth embodiment will be described. The back crotch 4D is provided with two back three-dimensional gathers 53, and one of the back three-dimensional gathers 53a has a free end 62a as a fixed end. It is formed so as to be located inward in the front-rear direction (X direction) from 58a (on the width direction center line Q side of the crotch part 4), and the other back side three-dimensional gather 53b has a free end 62b from a fixed end 58b. It is formed so as to be located outward in the X direction. The same applies to the ventral three-dimensional gather 54. In one ventral three-dimensional gather 54a, the free end 62a is inward in the front-rear direction (X direction) from the fixed end 58a (in the width direction center line Q side of the crotch part 4). The other back side three-dimensional gather 54b is formed such that the free end 62b is positioned outward in the X direction from the fixed end 58b.

According to the fifth embodiment, since the circumference of the crotch part 4 is surrounded by the pair of side solid gathers 51 and 52, urine, loose stool, etc. spread to the dorsal side 2 and ventral side 3 and dorsal Staining the part 2 and the ventral part 3 is effectively prevented, and the same effect as in the first embodiment is achieved. In addition to the pair of side three-dimensional gathers 51 and 52, the free end 62a further includes a back three-dimensional gather 53a and a ventral three-dimensional gather 54a facing inward in the front-rear direction. It is more effectively prevented that the dorsal part 2 and the ventral part 3 are spread by spreading on the dorsal part 2 and the ventral part 3.
Further, since the free end 62b has the back side three-dimensional gather 53b and the ventral side three-dimensional gather 54b facing outward in the front-rear direction, urine, soft stool, etc. have crossed the back side three-dimensional gather 53a and the ventral side three-dimensional gather 54a. Even in this case, since it can be spread and absorbed in the back side part 2 or the abdominal side part 3 through the back side three-dimensional gather 53b or the ventral side three-dimensional gather 54b, it is possible to prevent the bleeding from the connecting part.

The crotch part in the present invention preferably has a portion obtained by folding back a portion other than the three-dimensional gather in a Z shape at one end portion or both end portions in the front-rear direction (X direction).
FIG. 12 is a diagram showing a portion 7 that is folded back in a Z shape at the end on the back side 2 side of the crotch part 4 in the first embodiment.
The folded portion 7 shown in FIG. 12 includes a first bent portion 71 obtained by folding the top sheet 42 and the back sheet 43 extending from the end edge in the X direction of the absorber 44 in the vicinity of the end edge of the absorber 44; The top sheet 42 and the back sheet 43 have a second bent part 72 positioned inward in the front-rear direction (X direction) from the first bent part 71, and the first bent part 71 and the first bent part 71 A pocket 73 is formed between a portion located between the two bent portions 72 and the top sheet 42 located on the absorber 44.
Transition of urine, loose stool, etc. from the crotch part to the dorsal part and / or the abdominal part by forming a Z-shaped folded portion 7 at one or both ends in the front-back direction (X direction) of the crotch part Can be more effectively prevented.

  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. 13, 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. 13 have substantially the same configuration as a 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.

  The side three-dimensional gathers 51 and 52 in the first embodiment are formed so that the free ends 61 and 61 are parallel to the extending and contracting directions of the leg gathers 45 and 45 of the crotch part 4. The free ends 61 and 61 of 51 and 52 may have a convex arc shape toward the inside in the width direction of the crotch. Further, the absorbers 24 and 34 and the elastic members 25 and 35 in the back side portion 2 and / or the ventral side portion 3 may be omitted.

Further, the side three-dimensional gathers 51 and 52 in the second to fifth embodiments have the overlapping portions 65 of the three-dimensional gather forming sheets at both ends of the crotch part in the front-rear direction. Instead of such a superposed part, the end part on the part side and / or the abdomen side part side may have an abutting part in which edges on the free end side of the sheet for forming a three-dimensional gather are abutted.
Further, the side three-dimensional gathers 51 and 52 in the second to fifth embodiments do not need to be provided with the reduced width portion 66, and the width of the side three-dimensional gather may be uniform over the entire length.

Moreover, the side solid gathers in one embodiment mentioned above and the back side solid gathers and / or ventral side solid gathers in other embodiment can also be provided in arbitrary combinations.
For example, instead of the back side three-dimensional gather 53 and / or the ventral side three-dimensional gather 54 in the first embodiment, the back side three-dimensional gather and / or the abdomen in the third to fifth embodiments are used in the crotch part 4 of the first embodiment. Side solid gathers can also be provided. Moreover, the side solid gathers in the first embodiment and the back solid gathers and / or the ventral solid gathers in the third to fifth embodiments can be provided in combination.

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-5th embodiment, although the two elastic members were each distribute | arranged to the leg gather 45 and a pair of side three-dimensional gathers 51 and 52, respectively 1 or 3 or more are arranged. 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 side three-dimensional gather 53 and / or the ventral side three-dimensional gather 54 is used for side three-dimensional gathers in place of a laminated sheet having two layers formed by folding two sheets in two. It may be composed of a single sheet, such as a sheet for forming a three-dimensional gather, excluding the portion where the elastic member is disposed. 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, 4A-4D Crotch part 41 Fastening means 42 Top sheet 43 Back sheet 44 Absorber 45 Leg gather 46 Elastic member 51 for leg gather formation, 52 Side Solid Gather 56 Fixed Side 61 of Side Solid Gather 61 Free End of Side Solid Gather 55 Solid Gather Forming Sheet 66 for Side Solid Gather Multilayer Part (Reduced Part)
53, 53C dorsal solid gathers 54, 54C ventral solid gathers 58 dorsal or ventral solid gather fixed ends 62 dorsal or ventral solid gather free ends 59 for forming three-dimensional gathers for dorsal or ventral solid gathers Seat P Front-rear direction center line Q Crotch width direction center line

Claims (7)

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 has an absorber and a pair of leg gathers. A disposable diaper in which a three-dimensional gather is formed so as to surround the circumference of the crotch part.   The crotch part has a pair of side three-dimensional gathers at a position on the inner side in the width direction from the pair of leg gathers, and has a back side three-dimensional gather and a ventral side three-dimensional gather in the vicinity of both ends in the front-rear direction. The disposable diaper according to claim 1.   The crotch part has a pair of side three-dimensional gathers at a position inside the pair of leg gathers in the width direction, and one side three-dimensional gather has three-dimensional gathers at or near both ends of the crotch part in the front-rear direction. The disposable diaper of Claim 1 which has the butting | matching part by which the edge part of the superposition part of the sheet | seats for formation or the edge part of the free end side of the sheet | seat for solid gathers was faced | matched.   The disposable diaper according to claim 2 or 3, wherein the side three-dimensional gather has a width at the center of the crotch that is narrower than widths at both ends of the crotch in the front-rear direction.   The disposable diaper of Claim 3 which has a back side three-dimensional gather and / or a ventral side three-dimensional gather at the one end part or both ends of the front-back direction.   The disposable diaper according to claim 2 or 5, wherein the back side three-dimensional gather and / or the ventral side three-dimensional gather are formed so that the free end is located outward in the front-rear direction from the fixed end.   A plurality of dorsal solid gathers and / or ventral solid gathers are formed, one of which is formed such that the free end is positioned inward in the front-rear direction from the fixed end, and the other is free. The disposable diaper of Claim 2 or 5 formed so that an end may be located in the outward of the front-back direction from a fixed end.

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