JP2014233500A - Disposable pants-type diaper - Google Patents

Abstract

Disclosed is a disposable pants-type diaper that has a good appearance when worn.
A crotch panel 14 of a disposable pant-type diaper 10 includes a body fluid absorbing part 41, a leg flap 42 attached to the body fluid absorbing part 41, an outer sheet 76 and a leg flap 42 in the body fluid absorbing part 41. On the other hand, it has the exterior sheet 79 which overlaps from the outside of the diaper 10. In the lateral direction X of the diaper 10, the exterior sheet 79 has a joint portion for the leg flap 42 and the body fluid absorbing portion 41 inside the proximal edge 87 of the leg flap 42, and is more than the joint portion. Outside, it is in a non-bonded state with respect to the leg flap 42.
[Selection] Figure 1

Description

  The present invention relates to a disposable pant-type diaper, and more particularly to a disposable pant-type diaper having a front panel that forms a front waistline region, a rear panel that forms a back waistline region, and a crotch panel that forms a crotch region.

  Such disposable pants-type diapers having a front panel, a rear panel, and a crotch panel are known and well known. Disposable pants-type diapers in which the inseam panel includes an absorbent body including an aggregate of water-absorbing materials such as pulverized pulp, and leg flaps that are formed on both sides of the inseam panel and elastically extend and contract. Also known and well known.

  For example, an interior body, an absorbent element, and a second barrier cuff in a pants-type disposable diaper described in Japanese Patent Application Laid-Open No. 2008-253285 (Patent Document 1) correspond to a crotch panel, an absorbent body, and a leg-wrapping flap. is there.

  Moreover, an example of the pants-type absorbent article described in JP 2012-61138 A (Patent Document 2) is a pants-type diaper, and the diaper includes an absorbent main body, an absorbent body, and a second three-dimensional gather. Have. An absorptive main body is equivalent to a crotch panel, and a 2nd solid gather is equivalent to a leg circumference flap.

JP 2008-253285 A JP 2012-61138 A

  A pants-type diaper having a crotch panel in which an absorbent body and a leg-wrapping flap are formed has a sheet material such as a nonwoven fabric positioned between the elastic member attached to the leg-wrapping flap and the absorbent body when the diaper is worn. People who gather at the wearer's buttocks, make wrinkles there, and give the impression that the diaper does not fit the wearer's body can be seen from the front of the worn diaper.

Then, this invention makes it a subject to provide the disposable pants-type diaper improved so that the worn diaper may have a favorable external appearance.

  In order to solve the above-described problems, the present invention is directed to a front panel having a longitudinal direction, a lateral direction, and a front-rear direction orthogonal to each other, and forming a front waistline region and a rear panel forming a rear waistline region. Each of the front panel and the rear panel has a front end portion and a rear end portion that extend in the front-rear direction to form a crotch region. It is a disposable pants-type diaper.

  The features of the present invention in this diaper are as follows. That is, the crotch panel has an absorbent body having an outer surface facing the inner surface of the waistline region and an inner surface that is the opposite surface, and a transparent coating that covers at least the inner surface of the outer surface and the inner surface of the absorber. A leg having a bodily fluid absorbing part including a liquid inner sheet and an impermeable outer sheet covering the outer surface, and attached to the bodily fluid absorbing part and elastically extending and contracting in the front-rear direction. A rotating flap and an exterior sheet that overlaps the outer surface sheet and the leg-wrapping flap from the outside of the diaper, and at least the front end portion of the front end portion and the rear end portion is the inner surface of the front panel It is joined to. The body fluid absorbing portion is formed by at least one of the outer sheet and the inner sheet and has both side edges extending in the front-rear direction. The leg periphery flap extends in the front-rear direction along each side edge, and is separated from the proximal edge in the transverse direction and in the longitudinal direction, and is joined to the body fluid absorbing portion. A distal edge extending parallel to the proximal edge. The exterior sheet extends beyond the proximal edge in the lateral direction, and has a joint portion for the leg flap and the body fluid absorbing portion inside the proximal edge. However, it is in a non-joined state with respect to the leg flaps on the outside of the joint part.

  According to this invention, the crotch panel in the disposable pants-type diaper has the exterior sheet, and the exterior sheet overlaps the outer surface sheet of the body fluid absorbing portion and the leg-around flap from the outside of the diaper. The exterior sheet is also in a non-bonded state with respect to the leg flaps on the outer side of the site after contact with the outer sheet and the leg flaps in the lateral direction of the diaper. When the diaper is worn, the leg flaps gather at the buttock to create a wrinkle, but the part of the leg flap that is not joined can cover the wrinkle from the front of the diaper, The presence of the can prevent the appearance of the diaper from being deteriorated.

The perspective view of the disposable underpants type diaper concerning this invention. The side view of the diaper of FIG. The top view of the extension diaper obtained from the diaper of FIG. The exploded assembly figure of the extension diaper of FIG. The figure which shows the VV line | wire cut surface of FIG. The front view of the diaper of FIG. 1 made to wear on a human body model. The perspective view of the diaper of FIG. The side view of the diaper of FIG. FIG. 8 is a partial cross-sectional view taken along line IX-IX in FIG. 7. The figure which illustrates one aspect | mode of a leg periphery flap.

  The details of the disposable pants-type diaper according to the present invention will be described below with reference to the accompanying drawings.

  1 and 2 are a perspective view and a side view of an infant diaper 10 as an example of a disposable pants-type diaper according to the present invention. The diaper 10 is in a natural state in which no external force is applied except that a force is applied so as to open a waist opening 22 and a leg opening 23 described later. The diaper 10 includes a front panel 12 that forms the front waistline region 2, a rear panel 13 that forms the rear waistline region 3, and a crotch panel 14 that forms the crotch region 4. In the front panel 12 and the rear panel 13, the side edges 16 and 17 located in the lateral direction X overlap each other in the form of a palm, and are joined at a number of ultrasonic seals 15 to form an annular shape in FIG. 11 is formed. In the crotch panel 14, a front end portion 18 and a rear end portion 19, which will be described later, are joined to the inner surface of the front panel 12 and the inner surface of the rear panel 13, respectively. In such a diaper 10, a waist opening 22 is formed by the front panel 12 and the rear panel 13, and a pair of leg opening 23 is formed by the front panel 12, the rear panel 13, and the crotch panel 14. However, in FIG. 1, only one of the pair of leg openings 23 is shown. The periphery of the leg opening 23 is formed by a leg flap 42 in the crotch panel 14. In the lateral direction X of the diaper 10, the leg periphery flap 42 has an outer region 91 located on the outer side and an inner region 92 located on the inner side. In FIG. 1, a part of the inner region 92 is covered with a frill portion 79 a formed on both sides of the exterior sheet 79 in the crotch panel 14. In the figure, double-headed arrows X, Y, and Z that are orthogonal to each other indicate the horizontal direction, vertical direction, and front-rear direction of the diaper 10.

  3, 4, and 5, FIG. 3 shows that the front and rear panels 12 and 13 shown in the diaper 10 of FIG. 1 are unbonded at the seal portion 15 formed by ultrasonic welding treatment, adhesive, or the like. , 13 and the crotch panel 14 in a lateral direction X and a front-rear direction Z in FIG. 1 are partially broken plan views of a flat extended diaper 10a, and FIG. 4 is an exploded view of the extended diaper 10a. FIG. 5 is an assembly view, and FIG. 5 is a cross-sectional view taken along line VV in FIG. In these drawings, various elastic members described later are in a state of being stretched in the lateral direction X or the front-rear direction Z. In addition, in these elastic members, the portions covered with other members are indicated by chain lines in FIGS. The extended diaper 10a has a longitudinal center line P that bisects the dimension in the transverse direction X and a transverse center line Q that bisects the dimension in the front-rear direction Z, and is made symmetrical with respect to the longitudinal center line P. Yes. The VV line for obtaining FIG. 5 coincides with the horizontal center line Q. Further, the horizontal center line Q is also a line extending in the horizontal direction X at the lowermost end portion 70 of the crotch region 4 in the diaper 10 of FIG. In the present invention, the term “extension” refers to the diaper 10 or a part of the diaper 10 that is in a natural state to the extent that the gathers and diaper folds caused by the contraction of the elastic member disappear. It means extending in at least one of Y and the front-rear direction Z.

  The front panel 12 and the rear panel 13 not only form the waistline region 11 in the diaper 10 but also serve as an elastic belt for holding the body fluid absorbing portion 41 in the crotch panel 14 in the crotch region 4 of the diaper wearer. It also has a function. The front panel 12 is an inner layer sheet 54 that is also an inner surface of the diaper 10 and an inner surface of the extended diaper 10a and forms a part of the skin facing surface, and a non-skin facing surface that is an outer surface of the extended diaper 10a. And an outer layer sheet 56. The outer layer sheet 56 extends from the inner layer sheet 54 in the front-rear direction Z of FIG. 3, and is folded and overlapped on the inner surface side of the extended diaper 10 a at the upper end edge 12 a of the front panel 12. In the portion along the upper edge 12 a and the lower edge 12 b of the front panel 12, a plurality of first and second waistline elastic members 57, 58 extending in parallel with each other in the lateral direction X are provided to the outer layer sheet 56. It joins via a hot-melt-adhesive (not shown). The first waistline elastic member 57 is interposed between the outer layer sheets 56 that are folded and overlapped at the upper end edge 12a. The second waistline elastic member 58 is interposed between the belt-shaped covering sheet 59 that forms a part of the skin facing surface and the outer layer sheet 56.

  The rear panel 13 includes an inner layer sheet 64 that forms a part of the skin facing surface and an outer layer sheet 66 that forms a non-skin facing surface. The outer layer sheet 66 extends from the inner layer sheet 64 in the front-rear direction Z, is folded back to the inner surface side at the upper end edge 13a of the rear panel 13, and overlaps. At the portion along the upper edge 13a and the lower edge 13b of the rear panel 13, a plurality of third and fourth waistline elastic members 67, 68 extending in parallel with each other in the lateral direction X are hot melt adhesives (FIG. (Not shown) to the outer layer sheet 66. The third waistline elastic member 67 is interposed between the outer layer sheets 66 folded and overlapped at the upper end edge 13a. The fourth waistline elastic member 68 is interposed between the covering sheet 69 and the outer layer sheet 66 forming a part of the skin facing surface.

These inner layer sheets 54 and 64 and outer layer sheets 56 and 66 include spunbond / meltblown / spunbond nonwoven fabric (SMS nonwoven fabric), spunbond nonwoven fabric and the like having a mass per unit area in the range of 15-30 g / m ² . A nonwoven fabric or a plastic film having a thickness in the range of 10-50 μm can be used. A hot melt adhesive can be used for joining the inner layer sheets 54, 64 and the outer layer sheets 56, 66 or joining the outer layer sheets 56, 66 to each other. 3, the second waistline elastic member 58 extends between the side edge 16 of the front panel 12 and the body fluid absorption part 41 of the crotch panel 14 and crosses the leg flap 42. However, it is used in such a manner that it does not cross the body fluid absorption part 41. The fourth waistline elastic member 68 extends between the side edge 17 of the rear panel 13 and the leg flaps 42 of the crotch panel 14 and does not cross the body fluid absorber 41 and the leg flaps 42. Used in the embodiment. Therefore, the inner area 92 described later of the leg flap 42 does not contract even when the fourth waistline elastic member 68 contracts. The leg-around flap 42 in such a manner has an apparently smaller size in the lateral direction X due to the contraction of the second waistline elastic member 58 at the front portion thereof, so that it easily fits in the groin portion of the diaper wearer (see FIG. 7). ). Moreover, even if the 4th waistline elastic member 68 shrink | contracts, the back part of the leg periphery flap 42 does not produce a gather, but can cover a diaper wearer's buttocks widely.

  The front panel 12 and the rear panel 13 formed in this way are elastically stretched or shrunk by the action of the first, second, third and fourth waistline elastic members 57, 58, 67, 68. In the diaper 10 of FIG. 1, it fits elastically around the waist of the diaper wearer.

  3-5, in particular, as shown in detail in FIG. 5, the crotch panel 14 includes a body fluid absorbing portion 41 located at the center in the lateral direction X, and both sides of the body fluid absorbing portion 41 and the front-rear direction. A leg-wrapping flap 42 extending to Z and an exterior sheet 79 (see FIG. 1) that overlaps the body fluid absorbing portion 41 from the outside of the diaper 10. The body fluid absorbing portion 41 has a front end portion 41a, a rear end portion 41b, and an intermediate portion 41c so that the dimension W in the lateral direction X is uniform between the front panel 12 and the rear panel 13. Is formed. The dimension W is a linear distance between the distal edges 88 described later in the leg flaps 42 on both sides. In the crotch panel 14, the uniform dimension W means that the distal edges 88 are parallel to each other. The front end 41a is a portion that overlaps the inner surface of the front panel 12, and is joined to the inner surface via a hot melt adhesive (not shown). A part of the front end portion 41 a is covered with a folded outer layer sheet 56. The rear end portion 41b overlaps the inner surface or the outer surface of the rear panel 13, and preferably overlaps with the inner surface as shown in the drawing and is joined to the inner surface via a hot melt adhesive (not shown). . A part of the rear end portion 41b is located between the outer layer sheet 66 and the inner layer sheet 64, and is joined to both the sheets 66 and 64 via a hot melt adhesive (not shown). The leg-around flap 42 of the crotch panel 14 is formed so that the dimension in the front-rear direction Z is shorter than that of the body fluid absorbing portion 41, and the front end portion 42 a applies hot melt adhesive (not shown) to the covering sheet 59 in the front panel 12. The rear end portion 42b is joined to the covering sheet 69 of the rear panel 13 via a hot melt adhesive (not shown).

As shown in detail in FIG. 5, the body fluid absorbing portion 41 is an aggregate of body fluid absorbing material formed of pulverized pulp, a mixture of pulverized pulp and superabsorbent polymer particles conventionally used in the art, or the like. 71 has the absorber 73 coat | covered with the liquid-permeable wrapping sheet 72 formed with the tissue paper or the nonwoven fabric. The absorber 73 has an outer surface 73b that faces the inner surface 11a (see FIG. 1) of the waist region 11, and an inner surface 73a that is the opposite surface. In the absorber 73, at least the inner surface 73a of the inner surface 73a and the outer surface 73b is covered with a liquid-permeable inner surface sheet 74. In the illustrated example, the inner surface sheet 74 forms both side edges 45 of the body fluid absorbing portion 41. The outer surface 73b is also covered with an outer sheet 76 formed of a liquid-impermeable plastic film. An exterior sheet 79 formed of a nonwoven fabric is joined to the outer sheet 76 from the outside of the diaper 10, in other words, from the outside of the extended diaper 10a. The hot melt adhesive HA ₁ is interposed between the inner sheet 74 and the outer sheet 76, and the hot melt adhesive HA ₅ is interposed between the outer sheet 76 and the exterior sheet 79. Due to the presence of the exterior sheet 79, the diaper 1 has a cloth-like texture on the outside of the crotch panel 14. In FIG. 5, the outer sheet 76 and the outer sheet 79 are separated from each other in the longitudinal direction Y, but this state arises from the convenience of drawing to try to clarify the layer structure in the body fluid absorbing portion 41. It is one, in actual extension diapers 10a, and the outer sheet 76 and outer sheet 79 are bonded with a hot melt adhesive HA _5.

Further, as is apparent from FIGS. 3 and 5, the leg flap 42 extends in the front-rear direction Z along each of the side edges 45 of the body fluid absorbing portion 41, and overlaps two sheets 81a, 81b, for example, repellent It is formed by interposing a plurality of thread-like leg-line elastic members 82 between sheets 81a and 81b formed by folding a single nonwoven fabric 81 formed of thermoplastic synthetic fiber having water, The transverse direction X has a proximal edge 87 and a distal edge 88. In the transverse direction X, the leg flap 42 also includes an outer region 91 that includes a distal edge 88, an inner region 92 that is located between the outer region 91 and the proximal edge 87, and an inner region that includes a proximal edge 87. The inner edge portion 93 is located on the inner side of the inner edge portion 92, and the inner edge portion 93 is joined to the body fluid absorbing portion 41 via the hot melt adhesive HA ₂ . However, a part of the inner edge portion 93 and the body fluid absorbing portion 41 are illustrated in a state of being separated from each other in the vertical direction Y for convenience of drawing. At the proximal edge 87, the leg flaps 42 are joined to the outer sheet 76. In the outer region 91, a plurality of leg-hole elastic members 82 are in an extended state and in a parallel state, and extend between the front end portion 42a and the rear end portion 42b of the leg-wrap flap 42, and overlap two sheets 81a and 81b. At least one of them is joined via a hot melt adhesive (not shown). Accordingly, the outer region 91 can be repeatedly elastically expanded and contracted in the front-rear direction Z of FIG. 3. In the diaper 10 in the state of FIG. 1, a large number of gathers 95 are added to the contracted outer region 91. Is formed. The inner region 92 is a portion that only needs to be formed by two sheets 81a and 81b. In the illustrated example, a liquid-impervious plastic film 94, for example, a thickness is provided between the sheets 81a and 81b. The plastic film 94 may be present in the outer region 91, but the outer region 91 is made impermeable by interposing a polyethylene film of 10-20 μm. In the case where it is present at 91 and hinders elastic expansion and contraction of the outer region 91, it is preferably present only at the inner region 92. Plastic film 94 is joined to the seat 81a by means of hot melt adhesive HA _3, it is bonded to the sheet 81b by means of hot melt adhesive HA _4.

Further, as is apparent in FIG. 5, the outer sheet 76 and the leg flaps 42 of the body fluid absorbing portion 41 are covered by the outer sheet 79 from the outside of the diaper 10, in other words, from the outside of the extended diaper 10a. bonded to the outer sheet 79 through the melt adhesives HA _5. The spread of the exterior sheet 79 in the lateral direction X includes a portion 79 c that covers the outer sheet 76, a portion 79 b that covers the inner edge 93 in the leg flap 42, and the outer region 91 and the inner region 92. And a portion 79a covering at least a part of the inner region 92. However, in the lateral direction X, the range 79d in which such an exterior sheet 79 is joined to the leg flap 42 via the hot melt adhesive HA ₅ is that the body fluid absorbing portion 41 and the leg flap 42 are hot melt bonded. It does not extend beyond the part joined via the agent HA ₂ to the inner region 92 of the leg flap 42. That is, in the exterior sheet 79 of FIG. 5, the part 79c and the part 79b or the part 79c and a part of the part 79b that are located on the inner side of the proximal edge 87 of the leg-wrapping flap 42 are the body fluid absorbing part 41 and the leg part. A portion 79a that forms a joint portion with the flap 42 and extends outward in the lateral direction X beyond the proximal edge 87 is in a non-joined state with respect to the leg flap 42 and becomes a frill portion 79a.

  The leg periphery flap 42 shown with the virtual line in FIG. 5 has illustrated the process of wearing the diaper 10, and the state of the leg periphery flap 42 of the diaper 10 in a wearing state. In any state, the leg-wrapping flap 42 has a portion located outside the proximal edge 87, that is, the outer region 91 and the inner region 92 upward or downward in the longitudinal direction Y with the proximal edge 87 as a base. It is deformed to extend. In the leg-wrapping flap 42 in such a state, the exterior sheet 79 is joined to the leg-wrapping flap 42 at the portion 79c and the portion 79b located on the inner side of the proximal edge 87, and is located on the outer side of the proximal edge 87. Since the portion 79c is not joined to the leg flap 42, the exterior sheet 79 does not hinder the deformation in the longitudinal direction Y of the leg flap 42 based on the proximal edge 87. In other words, the exterior sheet 79 is joined to the leg-wrapping flap 42 even at the portion 79 a, reducing the flexibility of the leg-wrapping flap 42 at a portion adjacent to the proximal edge 87, and the proximal sheet of the leg-wrapping flap 42. It does not act to suppress movement in the longitudinal direction Y with the edge 87 as a base edge.

The outer region 91 in the leg flap 42 is located at the distal edge 88 as a leg elastic member 82, and is called the first elastic member in the present invention, the outermost elastic member 82a, and the innermost elastic member 82a. It includes inner elastic members 82b-82f which are located between the regions 92 and are either the second elastic member of the present invention or the third elastic member of the present invention. The second elastic member means a leg-hole elastic member that is inside the outermost elastic member 82a and has the same expansion ratio as the first elastic member 82a, and the third elastic member is more than the outermost elastic member 82a. This means a leg-hole elastic member that is inside and has a higher expansion ratio than the outermost elastic member 82a. The third elastic member is preferably located on the inner side in the outer region 91. Of the inner elastic members 82b to 82f, the inner elastic member 82f may be referred to as an innermost elastic member. In preferred outer region 91, the dimension _{L 1} in the transverse direction X is set to at least 10 mm. Dimension L ₁ is the dimension from the distal edge 88 elastic member located innermost of the outer region 91, for example until the illustration of the inner elastic member 82f. Note that the expansion ratio of the leg elastic member 82 is that the specimen 81 including one leg elastic member 82 cut out from the leg flap 42 together with the sheet 81 is pulled until the gathers by the elastic member disappear. and the length S ₁ of the elastic members when there is a resilient member naturally being removed from the specimen by immersing the specimen for example a toluene solution but for the length S ₂ when you have a straight The ratio means S ₁ / S ₂ . The lengths S ₁ and S ₂ may be a dimension between marked lines written on a specimen or an elastic member. In addition, in addition, in the present invention, when the extension force is applied to the leg elastic member 82, the length at the time of relaxation obtained by leaving a specimen including one leg elastic member 82 in a natural state. This means the force required to stretch the wire to twice its length. In order to extend the specimen, use one of Shimadzu Autograph AG-Xplus series or an equivalent thereof, and set the extension speed (tensile speed) to 100 m / min.

The inner region 92 in the leg flap 42 preferably includes no leg elastic member 82, but may include an elastic member having a lower expansion ratio than the outermost elastic member 82a. If the diaper 10 is intended for infants, the inner region 92, the transverse direction X of dimension _{L 2} is preferably at least 10 mm, more preferably set to at least 15 mm. Its dimensions L ₂ is the dimension from the proximal edge 87 as illustrated to the inner elastic member 82f which is located innermost of the outer region 91.

In the example of FIG. 5, spandex having 310 to 620 dtex can be used for the leg elastic member 82 so that the expansion ratio is 2.0 to 3.0 times. As the sheet 81, a sheet material known in the art such as an SMS nonwoven fabric or a spunbond nonwoven fabric having a mass per unit area of 15-30 g / m ² can be used. In the leg-wrapping flap 42 formed in this way, an example in which an inner elastic member 82b-82f having the same thickness and length as the outermost elastic member 82a is used at the same expansion ratio as the outermost elastic member 82a. In the crotch region 4 in FIG. 1, an inner region 92 located on a line extending in the lateral direction X through the lowermost end portion 70, that is, an inner region 92 located on the side of the lowermost end portion 70 is a perpendicular line. while double-headed rises sharply from the body fluid absorbent structure 41 so as to make a small crossing angle with respect to the perpendicular Y ₁ shown in parallel phantom arrow Y, the outer zone 91 in a state where the inner elastic member 82a-82f and contraction perpendicular It extends in the lateral direction X so as to create a relatively large crossing angle β with respect to Y ₁ . That is, the inner area 92 suddenly rises upward in the vertical direction Y, and the outer area 91 extends from the inner area 92 toward the outer side in the lateral direction X. Such a leg opening 23 is greatly opened as compared with the case where the entire leg flap 42, that is, both the outer area 91 and the inner area 92 rises suddenly. For the mother, the leg opening 23 can be clearly seen from the inside of the diaper 10, and the target for passing the infant's leg can be easily determined. At the same time, it is easy to pass the legs through the leg opening 23. In addition to the fact that the leg opening 23 is large, the work is easy. In addition to the fact that the work is easy because the leg opening 23 is large, the leg flaps 42 rise from below the leg opening 23 and try to pass the leg. Compared to the case where only the inner region 92 is a wall where the toes are easily caught, and the inner region 92 and the outer region 91 rise suddenly in the longitudinal direction Y, the wall height is remarkably high. It also means that the mother's work becomes easier by lowering.

Furthermore, the fact that the outer region 91 including the distal edge 88 in FIG. 1 tends to extend outward in the lateral direction X rather than upward in the longitudinal direction Y is that when passing the leg through the leg opening 23. The outer region 91 can be easily directed downward along the leg, and as a result, the outer region 91 can be easily fitted around the leg in a state of facing downward (see FIG. 7). Incidentally, in the diaper 10, when the entire leg flap 42 is facing upwards, the entire leg flaps 42 even after wearing the diaper 10 so as to make a small crossing angle with respect to the perpendicular Y ₁ In a state in which it faces upward, a part of the leg-wrapping flap 42 is in a state in which its outer surface is in contact with the leg periphery, and leakage of urine or the like from the leg periphery may easily occur. Therefore, it is necessary for the mother after putting on the diaper 10 to put his hand inside the leg opening 23 from the outside of the diaper 10 and to make the leg flap 42 face downward. However, according to the diaper 10 according to the present invention, leakage from the leg circumference can be prevented by the outer region 91 fitted around the leg without the mother performing such work.

The attachment structure to the rear panel 13 of the leg flap 42 also contributes to the fact that the leg flap 42 can act in this way. That is, in FIG. 3, the fourth waistline elastic member 68 of the rear panel 13 may extend so as to intersect the legline elastic member 82 of the outer region 91 with respect to the rear end portion 42 b of the legline flap 42. , Do not extend to the inner region 92. Therefore, the inner zone 92, inner region dimension L ₂ in the transverse direction X is located in the fourth without that are contracted by the contraction of the waist elastic member 68, the side of the lowermost portion 70 of the crotch region 4 92 tends to have a crossing angle with respect to perpendicular line Y ₁ of Fig. 1 increases. Note that the vertical line Y ₁ in FIG. 1 is as follows. That is, in the transverse direction X of the diaper 10 of Figure 1, the virtual line X ₁ connecting to what top 10b of the side edges 16 and 17 is the part that joined together around the panel 12 and 13, it when the horizontal It almost coincides with the double-headed arrow X. Perpendicular Y ₁ in FIG. 1, perpendicular orthogonal to such horizontal imaginary line X _1, or a vertical line parallel to the perpendicular line.

  In the side view of the diaper 10 shown in FIG. 2, when the leg opening 23 is observed at a horizontal viewing angle, the outer region 91 of the leg flap 42 acts to enlarge the leg opening 23 at the peripheral edge of the leg opening 23. You can see that

  FIG. 6 is a front view of the diaper 10 worn on the infant human body model 100. In this figure, the inner area 92 in the leg-wrapping flap 42 is behind the frill portion 79a in the exterior sheet 79 and does not enter the eyes of an observer (not shown) located in front of the diaper 10. The observer can see only the portion located in the buttocks of the model 100 in the outer region 91.

  FIG. 7 is a perspective view of the diaper 10 of FIG. In FIG. 7, the outer region 91 and the inner region 92 of the leg flap 42 extend along the thigh portion 100 a (see FIG. 9) forming a collar portion. The outer region 91 extends so as to be in close contact with the portion 100a, but the inner region 92 has a large number of wrinkles. The frill part 79a in the exterior sheet 79 acts so that the inner region 92 is difficult to see from the front or from the front. By such an action of the frill portion 79a, the diaper 10 in the worn state can give a good impression that it fits well to the wearer's waist and legs around the wearer. When the dimension W (see FIG. 3) in the lateral direction X of the crotch panel 14 is uniform in the crotch region 4, if the wearer's buttocks are to be covered widely, the dimension W must be increased, and the crotch panel 14 Will be wide. Therefore, the inner region 92 of the leg flap 42 that gathers at the groin of the wearer tends to make many wrinkles, and the frill portion 79a makes it difficult to see the inner region 92 in such a state. It is preferable for making the appearance of the diaper 10 slim.

  FIG. 8 is a side view of the diaper 10 of FIG. In FIG. 8, an outer region 91 and an inner region 92 that are located in the heel portion of the leg flaps 42 can be seen below the front panel 12. A frill portion 79a is present in front of the leg flap 42.

FIG. 9 is a partial cross-sectional view taken along the line IX-IX in FIG. 7, and shows an example of the state when the leg flap 42 is in close contact with the thigh portion 100 a of the model 100. Looking at the diaper 10 in the worn state, the outer region 91 of the leg flap 42 is the inner surface 91a (see FIG. 5) at a portion extending in the lateral direction X at the lowermost end portion 70 (see FIGS. 1 and 6) of the crotch region 4. ) May be in close contact with the portion 100a, but the outer region 91 may be bent in the lateral direction X of the diaper 10 as illustrated, and may be in close contact with the portion 100a even in the bent state. The outer region 91 in such a state is interposed between the thigh portion 100a and the inner region 92 together with the frill portion 79a (see FIG. 5) covering at least a part of the inner region 92 as a result of bending. Thus, the inner region 92 having many wrinkles is covered, and the inner region 92 can be prevented from stimulating the portion 100a even by rubbing the thigh portion 100a. The outer region 91 and the frilled portion 79a for acting in this manner are such that the sum of dimensions on the lateral center line Q (see FIG. 3) passing through the lowermost end portion 70 of the crotch region 4 is in the lateral direction X of the inner region 92. Preferably it is larger than the dimension. In addition, furyl portion 79a preferably has a dimension on the horizontal center line Q in FIG. 5 is 1/2 or more of the dimension L ₂ on the transverse center line Q of the inner region 92.

FIG. 10 is an enlarged view of a part of FIG. 3, showing an example of an embodiment of the present invention. In the crotch panel 14 shown in the figure, the proximal edge 87 of the leg periphery flap 42 extends in parallel with each other in the lateral direction X, in other words, in the width direction of the leg periphery flap 42 with respect to the outer sheet 76 in the body fluid absorbing portion 41. In the state in which the gathers 111 are formed, bonding is performed via the hot melt adhesive HA ₂ (see FIG. 5). The gather 111 may extend to between the proximal edge 87 and the distal edge 88. In addition, the outer region 91 is also formed with a gather 112 due to contraction of the leg-hole elastic member 82. However, it is difficult to identify the gathers 111 and 112 in the actual diaper 10. The illustrated apparent dimension M ₁ between the front panel 12 and the rear panel 13 for the leg flap 42 is the same as the dimension N of the body fluid absorbing portion 41. However, extension dimension _{M 2} of real leg flaps 42 obtained when extended to such an extent that the leg flap 42 has been removed from the diaper 10a and gathers 111 112 and disappears, the front and rear panels 3 12 The actual length of the sheets 81a and 81b located between the two is greater than the dimension N. In the leg flap 42 formed in this way, the elastically contracting movement of the outer region 91 is not constrained or strongly constrained by the body fluid absorbing part 41 having the dimension N. Free contraction of the outer area 91 becomes possible. Therefore, for example, when the leg elastic members 82 illustrated in FIG. 5, specifically, the leg elastic members 82 (82 a to 82 f) are all the same, the outer region 91 is substantially the same as the imaginary line X ₁ in FIG. 1. or extending parallel, it is possible to or extending slightly inclined with respect to the imaginary line X _1. The leg opening 23 including such an outer region 91 becomes a large opening and facilitates the passage of the leg. When the leg flap 42 has such a dimension M _2, furyl portion 79a of the outer sheet 79 may be difficult to see in the groin to the inner zone 92 in the leg flap 42, the diaper 10 having the embodiment of FIG. 9 This is very preferable for making the appearance slim.

  Incidentally, an example of a method for attaching such a leg periphery flap 42 to the body fluid absorbing portion 41 is as follows. That is, while supplying the first web, which is a continuous body of the sheets 81 for forming the leg-wrapping flaps 42, in the machine direction, the continuous elastic member, which is a continuous body of the leg-hole elastic members 82, is extended by a required magnification. Feed in the machine direction and join to the required part of the first web using hot melt adhesive to make a first composite web. A pair of first feed rolls having a high peripheral speed is set on the upstream side in the machine direction, and a second feed roll having a low peripheral speed is set on the downstream side, and the first composite web has these first and second webs. When passing the feed roll, a gather corresponding to the gather 111 is formed on the first composite web on the upstream side of the second feed roll. After the first composite web having gathers passes through the second feed roll, the first composite web is quickly joined to, for example, a web that is a continuous body of the outer sheet 76 via a hot melt adhesive to form a second composite web. The second composite web is cut to a required length, or before being cut, the absorbent body 73 that flows intermittently in the machine direction or the inner face sheet 74 or the outer face sheet 76 that covers the absorbent body 73. It joins to a required part of this through a hot melt adhesive.

  In this invention, the bodily fluid absorption part 41 of the diaper 10 can also be provided with a leakage barrier (sometimes referred to as a three-dimensional gather) commonly used in the technical field. Moreover, in the diaper 10, instead of the bodily fluid absorbing portion 41 in the illustrated example, the bodily fluid absorption in a mode in which the dimension W (see FIG. 3) between the distal edges 88 gradually increases from the front panel 12 toward the rear panel 13. Part can also be used.

  The disclosure relating to the present invention described above can be organized into at least the following matters.

The front panel having a longitudinal direction, a lateral direction, and a front-rear direction orthogonal to each other, and a front panel forming a front waistline region and a rear panel forming a rear waistline region form a waistline region having inner and outer surfaces, and the front panel and the Each of the rear panels is a disposable pants-type diaper in which the front end portion and the rear end portion of the crotch panel that extend in the front-rear direction to form a crotch region are joined.
The crotch panel has an absorbent body having an outer surface facing the inner surface of the waistline region and an inner surface that is the opposite surface, and liquid permeability that covers at least the inner surface of the outer surface and the inner surface of the absorber. The leg flap which has a bodily fluid absorption part containing an inner sheet | seat and the liquid-impermeable outer sheet | seat which coat | covers the said outer surface, is attached to the said bodily fluid absorption part, and is elastically expandable and contractible in the said front-back direction. And an exterior sheet that overlaps the outer sheet and the leg flaps from the outside of the diaper, and at least the front end portion of the front end portion and the rear end portion is joined to the inner surface of the front panel doing. The body fluid absorbing portion is formed by at least one of the outer sheet and the inner sheet and has both side edges extending in the front-rear direction. The leg periphery flap extends in the front-rear direction along each side edge, and is separated from the proximal edge in the transverse direction and in the longitudinal direction, and is joined to the body fluid absorbing portion. A distal edge extending parallel to the proximal edge. The exterior sheet extends beyond the proximal edge in the lateral direction, and has a joint portion for the leg flap and the body fluid absorbing portion inside the proximal edge. However, it is in a non-joined state with respect to the leg flaps on the outside of the joint part.

  The disposable pants-type diaper according to the present invention disclosed in the above paragraph includes at least the following embodiments, and these embodiments can be adopted separately or in combination with each other.

  The leg flaps include an outer region in which a plurality of elastic members parallel to the distal edge are attached in an extended state between the proximal edge and the distal edge in the lateral direction; An embodiment in which the distal edge is extendable and contractible by the elastic member, being divided into an inner region between the region and the proximal edge and not including an elastic member.

  The aspect in which the exterior sheet that extends outward beyond the proximal edge in the lateral direction does not extend beyond the distal edge of the leg flap.

  The body fluid absorbing portion and the leg-wrapping flap in the crotch panel are separate from each other, and are integrated by joining to each other at the proximal edge of the leg-wrapping flap, and the proximal edge is The aspect joined to the said bodily fluid absorption part in the state in which many gathers extended mutually parallel to the said horizontal direction were formed.

  In the portion that extends in the lateral direction at the lowermost end portion of the crotch region, the lateral dimension of the outer side region of the leg flaps and the exterior sheet that extends outward in the lateral direction beyond the proximal edge The aspect with the sum with the said horizontal dimension larger than the said horizontal dimension in the said inner area of the said leg periphery flap.

  The crotch panel is a mode in which the dimension between the distal edges is uniform between the front panel and the rear panel.

2 Front waistline area 3 Rear waistline area 4 Inseam area 10 Disposable pants-type diaper 11 Girth area 11a Inner surface 12 Front panel 13 Rear panel 14 Inseam panel 41 Body fluid absorption part 41a Front end part 41b Rear end part 42 Leg around flap 45 Rear end part 70 Bottom end
73 Absorber 73a Inner surface 73b Outer surface 79 Exterior sheet 82 Leg elastic member 87 Proximal edge 88 Distal edge 91 Outer region 92 Inner region 111 Gather L ₁ size L ₂ distance, size X Horizontal direction Y Vertical direction Z Front-back direction

Claims (6)

The front panel having a longitudinal direction, a lateral direction, and a front-rear direction orthogonal to each other, and a front panel forming a front waistline region and a rear panel forming a rear waistline region form a waistline region having inner and outer surfaces, and the front panel and the Each of the rear panel is a disposable pants-type diaper in which each of the front end portion and the rear end portion of the crotch panel that extends in the front-rear direction and forms a crotch region is joined,
The crotch panel has an absorbent body having an outer surface facing the inner surface of the waistline region and an inner surface that is the opposite surface, and liquid permeability that covers at least the inner surface of the outer surface and the inner surface of the absorber. The leg flap which has a bodily fluid absorption part containing an inner sheet | seat and the liquid-impermeable outer sheet | seat which coat | covers the said outer surface, is attached to the said bodily fluid absorption part, and is elastically expandable and contractible in the said front-back direction. And an exterior sheet that overlaps the outer sheet and the leg flaps from the outside of the diaper, and at least the front end portion of the front end portion and the rear end portion is joined to the inner surface of the front panel And
The bodily fluid absorption part has both side edges that are formed by at least one of the outer sheet and the inner sheet and extend in the front-rear direction,
The leg periphery flap extends in the front-rear direction along each side edge, and is separated from the proximal edge in the transverse direction and in the longitudinal direction, and is joined to the body fluid absorbing portion. A distal edge extending parallel to the proximal edge,
The exterior sheet extends beyond the proximal edge in the lateral direction, and has a joint portion for the leg flap and the body fluid absorbing portion inside the proximal edge. And the said diaper characterized by being in a non-joined state with respect to the said leg periphery flap outside the said joint part.   The leg flaps include an outer region in which a plurality of elastic members parallel to the distal edge are attached in an extended state between the proximal edge and the distal edge in the lateral direction; The diaper according to claim 1, wherein the diaper is divided into an inner region between a region and the proximal edge and does not include an elastic member, and the distal edge can be extended and contracted by the elastic member.   The diaper according to claim 1 or 2, wherein in the lateral direction, the exterior sheet that extends outward beyond the proximal edge does not extend beyond the distal edge of the leg flap.   The body fluid absorbing portion and the leg-wrapping flap in the crotch panel are separate from each other, and are integrated by joining to each other at the proximal edge of the leg-wrapping flap, and the proximal edge is The diaper in any one of Claims 1-3 joined to the said bodily fluid absorption part in the state in which many gathers extended mutually parallel to the said horizontal direction were formed.   In the portion that extends in the lateral direction at the lowermost end portion of the crotch region, the lateral dimension of the outer side region of the leg flaps and the exterior sheet that extends outward in the lateral direction beyond the proximal edge The diaper according to any one of claims 1 to 4, wherein a sum of the lateral dimension is larger than the lateral dimension in the inner region of the leg flap.   The diaper according to claim 1, wherein the crotch panel has a uniform dimension between the distal edges between the front panel and the rear panel.

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