JP2014023949A - Underpants-type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underpants-type disposable diaper adjustable in a leg peripheral size.SOLUTION: This underpants-type disposable diaper includes inner outer junctions 71 and 72 which join each an overlapping part of an internal body 200 and an external sheet 12F of an abdominal side, and an overlapping part of the internal body 200 and an external sheet 12B of a back side. The inner outer junctions 71 and 72 of the abdominal side and the back side are a non-peelable junction 71 preventing the end part of a waist side from peeling off, and the external sheet of a side including a peelable junction is provided with a marginal-part-detaching perforation for detaching the marginal part of a crotch side over the entire width direction.

Description

  The present invention relates to a pants-type disposable diaper.

  The pants-type disposable diaper includes an exterior sheet having a front body and a back body, and an interior body including an absorbent body joined to the inner surface of the exterior sheet, and the front body and the back body of the exterior sheet are on both sides. It is a product in which a waist opening and a pair of left and right leg openings are formed by being joined, and when worn, like the underwear pants, the wearer is standing one leg at a time through the waist opening. Then, after passing through the leg opening, it is pulled up to the waist (for example, see Patent Documents 1 and 2). Hereinafter, the fixing portion between the exterior sheet and the interior body is also referred to as an inner / outer joint.

  In order to improve the fit, the pants-type disposable diaper is generally provided with, for example, an elastic elastic member such as a thread rubber around the leg and the waist (for example, Patent Document 1, Patent) (Ref. 2), the size and elasticity of the leg openings are set to be relatively small in consideration of side leakage. You may not be able to pass. In this case, if the wearer stands on one foot and this state continues for a long time, there is a risk of falling. In addition, for wearers with thick legs or large buttocks for the waist dimensions, choosing a diaper according to the waist dimensions will tighten the legs, so that the legs will fit. When a diaper is selected, the waist becomes loose, and there is a problem that it is difficult to properly fit the standard dimensional setting.

JP 2011-156341 A JP 2004-329386 A

  Then, the main subject of this invention is providing the underpants type disposable diaper which can adjust a leg periphery dimension.

The present invention that has solved the above problems is as follows.
<First Reference Form>
A cylindrical waistline portion in which both side portions of the ventral exterior sheet and both side portions of the back exterior sheet are joined to form a side seal portion,
An interior body that is an excretion absorbing portion extending from the inner surface of the exterior sheet on the ventral side to the inner surface of the exterior sheet on the back side,
The ventral side exterior sheet and the back side exterior sheet are spaced apart from each other without being continuous on the crotch side,
In a pants-type disposable diaper having an overlapping part between the inner body and the abdominal exterior sheet, and an inner and outer joint part that respectively joins the overlapping part between the interior body and the back exterior sheet,
At least one of the inner and outer joints on the abdominal side and the back side is a non-peeling joint where the end on the waist side does not peel off, and a detachable joint where the crotch side part can be detached from the joint that does not peel off Being
A pants-type disposable diaper characterized by that.

(Function and effect)
In this pants-type disposable diaper, the detachable joint is removed, the crotch side end of the exterior sheet is freed, and after the free part is lifted up, the leg opening is enlarged by joining again with the detachable joint Can do. In other words, if the attachment / detachment joints are provided on both the abdomen and the back side, and both the abdomen exterior sheet and the dorsal exterior sheet are lifted up, the entire leg opening can be enlarged, If only the side exterior sheet is lifted (or the same as if the detachable joint is provided only on the abdomen), if only the back side exterior sheet is squeezed (or if the detachable joint is provided only on the back side) ) The leg opening can be enlarged only backwards.
Therefore, by enlarging the leg opening before wearing, it is easy to pass the wearer's foot through the leg opening. Further, by enlarging the leg opening part before or after the wearing, it is possible to appropriately fit even a wearer with a thick leg or a wearer with a large buttocks.

<Second Reference Form>
The attachment / detachment joint is configured to be attachable / detachable by a hook material of a mechanical fastener provided on the inner surface of the exterior sheet and a locked material to which the hook material provided on the outer surface of the interior body is engaged. The pants type disposable diaper of the 1st reference form which is.

(Function and effect)
The attachment / detachment means of the attachment / detachment joint portion may be an adhesive, but it is desirable to use a hook material (male material) of a mechanical fastener (surface fastener) in that the joint strength hardly decreases even when attachment / detachment is repeated. However, if the hook material of the mechanical fastener is provided on the outer surface of the interior body, the hook material may be exposed when the exterior sheet is lifted up, and may be erroneously locked to the underwear or clothes. Therefore, it is preferable that the hook material is provided on the inner surface of the exterior sheet.

<Third Reference Form>
The back-side inner / outer joint has the detachable joint, and has a perforated cut-off perforation from the crotch-side edge toward the waist side at the center in the width direction of the back-side exterior sheet. Pants type disposable diaper of reference form.

(Function and effect)
In this embodiment, the back side attachment / detachment joint is removed, the buttock parting perforation is cut off, and the crotch side of the back side exterior sheet is widened to the left and right, and then joined again by the attachment / detachment joint, The leg opening can be expanded rearward without raising the exterior sheet, that is, while maintaining the covering of the lower side of the buttock by the exterior sheet on the back side. Of course, it is also possible to combine the raising of the back exterior sheet.

<Fourth Reference Form>
Of the crotch side end portion and the waist side portion of the exterior sheet on the side having the detachable joining portion or the side seal portion, one end portion of the scooping member is fixed to the crotch side end portion, and the other end of the scooping member The underpants type disposable diaper of the reference form in any one of the 1st-3rd which penetrates the side to a waist side part.

(Function and effect)
By providing such a lifting member, the exterior sheet can be easily lifted by picking up the other end of the lifting member and pulling it up.

<Invention of Claim 1>
A cylindrical waistline formed by joining both sides of the abdominal exterior sheet and both sides of the exterior exterior sheet;
An interior body that is an excretion absorbing portion extending from the inner surface of the exterior sheet on the ventral side to the inner surface of the exterior sheet on the back side,
The ventral side exterior sheet and the back side exterior sheet are spaced apart from each other without being continuous on the crotch side,
In a pants-type disposable diaper having an overlapping part between the inner body and the abdominal exterior sheet, and an inner and outer joint part that respectively joins the overlapping part between the interior body and the back exterior sheet,
At least one of the inner and outer joints on the ventral side and the back side is a non-peeling joint where the end on the waist side is not peeled off, and a peeled joint where the crotch part is peelable from the joint that does not peel off Has been
In the exterior sheet on the side having the peel joint, an edge cut perforation is provided for cutting the crotch side edge over the entire width direction,
A pants-type disposable diaper characterized by that.

(Function and effect)
In this pants-type disposable diaper, the leg opening is enlarged by separating the crotch side edge over the entire width direction by the edge cut perforation and separating the part from the interior body by peeling off the peeling joint. Can do. That is, if the crotch side edges of both the abdominal side and the back side exterior sheet are separated, the entire leg opening can be enlarged, and if only the abdominal side exterior sheet is separated from the crotch side edge (or the abdomen) The same is true even if the detachable joint is provided only on the side) If only the crotch side edge is separated only on the front side, or only on the back side (or the detachable joint is provided only on the back side), the leg only on the back The opening can be enlarged.
Therefore, by enlarging the leg opening before wearing, it is easy to pass the wearer's foot through the leg opening. Further, by enlarging the leg opening part before or after the wearing, it is possible to appropriately fit even a wearer with a thick leg or a wearer with a large buttocks.
In addition, the peeling joint part can acquire the same effect also as an above-mentioned attachment / detachment joint part. In this case, the exterior sheet can be lifted, but this embodiment has an advantage that the leg opening can be enlarged without lifting the exterior sheet (that is, without wrinkles).

  As described above, there are advantages such that the leg circumference dimensions can be adjusted.

It is a top view in the state where the diaper was developed showing the inside of a pants type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a pants type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 in FIG. It is 7-7 sectional drawing of FIG. It is 8-8 sectional drawing of FIG. It is a top view in the state where a diaper was developed showing only a principal part of a pants type disposable diaper with a size. It is sectional drawing which shows only the principal part of an underpants type disposable diaper with a dimension. It is a front view of the underpants type disposable diaper of a product state. It is a rear view of the pants type disposable diaper of a product state. It is a rear view of the underpants type disposable diaper of the state where it folds up. It is a rear view of the underpants type disposable diaper of the state where it folds up. It is a principal part enlarged view of a raising member. It is a top view in the state where the diaper was developed showing the outer surface of a pants type disposable diaper. It is a rear view of the pants type disposable diaper of a product state.

  Below, the basic structure example of a pants type disposable paper diaper is demonstrated first, and the characteristic part is demonstrated next. In each figure, “front-rear direction (vertical direction)” means a direction connecting the ventral side (front side) and back side (rear side), and “width direction” means a direction (left-right direction) orthogonal to the front-rear direction. The "up and down direction" means the wearing state of the diaper, that is, the direction perpendicular to the waistline direction when the diaper is folded in two at the crotch so that both the front body side and the back body side of the diaper overlap each other In other words, it means the direction connecting the waist opening WO side and the crotch side.

<Basic structure example of pants-type disposable diapers>
1 to 9 show an example of a pants-type disposable diaper. This pants-type disposable diaper has an abdominal exterior sheet 12F covering the abdominal side of the wearer's waist and a back exterior sheet 12B covering the back side, and the width direction of the abdominal exterior sheet 12F Both side edges and both side edges in the width direction of the back exterior sheet 12B are welded and joined by heat sealing, ultrasonic welding, or the like over the entire vertical direction to form a cylindrical waistline portion 100. Reference numeral 12A denotes a side seal portion as a group of individual weld portions. As shown in the figure, when the back exterior sheet 12B extends below the welded portion 12A, a process such as heat sealing is integrally performed in the vertical range including this portion, and the back The extension weld part 12E can be provided in the side extension part 14. FIG. By providing the extended welded portion 12E, it is possible to prevent the second elongated elastic elastic member 16 from being pulled in the backside extended portion 14 described later. In this case, in consideration of the ease of tearing of the side portions, the welded portion 12A is generally composed of a group of small welded portions, and a bonding pattern with a low ratio of the welded area in the welded portion 12A is generally used. Since it is not necessary to consider the ease of tearing in the welded portion 12E, the second elongated elastic elastic member 16 is surely welded and fixed by making the ratio of the welded area higher than the welded portion 12A. May be. Further, the extended welded portion 12E can be welded by a curved line at the edge of the collar cover portion 14C, and the second elongated elastic elastic member 16 of the collar cover portion 14C can be prevented from being pulled.

  In addition, the front end portion of the interior body 200 is connected to the inner surface in the width direction of the abdominal exterior sheet 12F in the waist portion 100 by the inner and outer joints, and the interior body is connected to the inner surface in the width direction center of the back exterior sheet 12B. The rear end portion of 200 is connected by an inner / outer joint, and the abdominal exterior sheet 12F and the back exterior sheet 12B are not continuous on the crotch side and are separated. This separation distance Y can be about 150 to 250 mm. Although not shown, a form in which the abdominal side exterior sheet 12F and the back side exterior sheet 12B are continuous at the crotch, that is, a form in which the abdomen side to the back side are continuously covered with an integral exterior sheet may be employed. it can.

  As can be seen from FIGS. 7 and 8, the upper opening of the waistline portion 100 becomes a waist opening WO through which the wearer's torso passes, and the lower edge of the waistline portion 100 and the interior body 200 on both sides in the width direction of the interior body 200. The portions surrounded by the side edges are leg openings LO through which the legs pass. In the state where each welded portion 12A is peeled off and developed, an hourglass shape is formed as shown in FIG. The interior body 200 extends from the back side through the crotch part to cover the abdomen side, and is a part that receives the excrement and absorbs and retains the liquid. This is the part that supports the wearer.

(Exterior sheet)
The stomach-side exterior sheet 12F and the back-side exterior sheet 12B are formed by laminating two sheet-like materials 12 and 12 as shown in FIGS. 12 extends only to the edge of the waist opening WO, but the outer sheet-like material 12 located on the outer side wraps around the waist-side edge of the inner sheet-like material 12 and is folded inside. The folded portion 12r extends so as to cover the upper end of the interior body 200 and is fixed to the opposing surface with a hot melt adhesive or the like. The sheet-like material 12 is not particularly limited as long as it can be joined by welding, but is preferably a nonwoven fabric. The nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When using a nonwoven fabric, it is preferable that the basic weight shall be about 10-30 g / m < ² >.

  And in order to improve the fit property with respect to the trunk | drum, long and thin elastic elastic members 15-19, such as a rubber thread, are predetermined between the sheet-like materials 12 and 12 in the abdominal-side exterior sheet 12F and the back-side exterior sheet 12B. It is provided with the elongation rate. As the elongated elastic elastic members 15 to 18, 19, synthetic rubber or natural rubber may be used. Hot melt bonding, heat sealing, or ultrasonic bonding can be used for bonding the sheet materials 12 and 12 of the exterior sheets 12F and 12B and fixing the elongated elastic members 15 to 19 sandwiched therebetween. . If the entire surface of the exterior sheets 12F and 12B is firmly fixed, the texture of the sheet is impaired, which is not preferable. By combining these, it is preferable that the elongated elastic elastic members 15 to 19 are firmly bonded, and other portions are not bonded or bonded weakly.

  More specifically, the back-side exterior sheet 12B includes a back-side main body portion 13 that occupies the same vertical range as the side seal portions by the welded portion 12A group, and a back side that extends below the back-side main body portion 13. And an extending portion 14. The back extension part 14 has a width direction center part 14 </ b> M overlapping with the interior body 200, and a buttock cover part 14 </ b> C extending on both sides thereof.

  The shape of the dorsal extension 14 can be determined as appropriate, but in the illustrated example, the upper end of the dorsal extension 14 has the same width as the dorsal body 13 and extends below the dorsal body 13. The width is narrowed as the lower side approaches the crotch side. A portion having the same width as that of the back-side main body 13 can be omitted. If comprised in this way, the edge 14e of the width direction outer side of the buttock cover part 14C will come in the shape of a straight line or a curve which approaches the interior body 200 side as it approaches the crotch side, and it is easy to cover a buttock part. It becomes a shape.

  Although the dimension of the back side extension part 14 can be determined suitably, as shown in FIG. 6, the width direction length 14x of the collar part cover part 14C (the edge 14e on the width direction outer side of the collar part cover part 14C and the inner body 200) More preferably, the maximum distance in the width direction with respect to the side edge is 80 to 160 mm, and the length 14y (extension length) in the vertical direction of the collar cover portion 14C is 30 to 80 mm. Further, assuming that the area of a quadrangle determined by the widest part in the width direction and the widest part in the vertical direction is S, the area of the back side extension part 14 is 20 to 80% of S, In particular, it is preferable that the content is about 40 to 60% because the outer appearance and wearing feeling of the buttocks are excellent.

  The back body 13 can be conceptually divided into an upper end (waist part) W and a lower part U below the upper part in the vertical direction, and the range varies depending on the size of the product. The vertical length of the upper end W can be 15 to 80 mm, and the vertical length of the lower portion U can be 35 to 220 mm.

Between the inner side surface of the inner sheet-like material 12 and the outer side surface of the folded-back portion 12r of the outer sheet-like material at the upper end (waist portion) W of the back-side main body portion 13, a plurality of pieces are continuously provided in the entire width direction. The back waist elastic elastic members 17 are fixed in a state of being spaced apart in the vertical direction and extended along the width direction at a predetermined extension rate. In addition, one or more of the back-side waist elastic elastic members 17 disposed in the region adjacent to the lower portion U of the back-side main body 13 may overlap the interior body 200. Alternatively, it may be provided on both sides in the width direction except for the central portion in the width direction that overlaps the interior body 200. The back waist elastic elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to the rubber thread of 1.0mm about ^2), 3 to 22 present approximately at intervals of 4 to 12 mm, respectively elongation from 150% to 400%, preferably fixed in particular about 220-320%. Further, it is not necessary that all of the back side waist elastic elastic members 17 have the same thickness and extension rate. For example, the thickness and extension rate of the elastic elastic members may be different between the upper part and the lower part of the back waist part. Good.

  Further, between the outer side surface of the inner sheet-like material 12 and the inner side surface of the outer sheet-like material 12 in the lower portion U of the back-side main body portion 13, except for the center portion in the width direction overlapping the interior body 200, A plurality of first elongated elastic members 15 are vertically spaced along the width direction at a predetermined elongation rate so as to be continuous over the entire width direction at each of the upper and both sides in the width direction. It is fixed in the stretched state.

The first elongated elastic elastic member 15 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1. the rubber thread ~1.0mm about ^2), 1 to 15 mm, particularly 5 to 30 present approximately at intervals of 3 to 8 mm, respectively elongation 200-350%, preferably fixed in particular about 240-300%.

  In addition, between the outer side surface of the inner sheet-like material 12 and the inner side surface of the outer sheet-like material 12 in the back side extending portion 14, except for the center portion in the width direction that overlaps the interior body 200, The plurality of second elongated elastic elastic members 16 are spaced in the vertical direction so as to be continuous with each part over the entire width direction (at least over the entire buttock cover portion 14C), and at a predetermined elongation rate in the width direction. It is being fixed in the state extended along.

The second elongated elastic elastic member 16 has a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1. the rubber thread ~1.0mm about ^2), 5 to 40 mm, in particular 2 to 10 present approximately at intervals of 5 to 20 mm, respectively elongation 150-300%, preferably fixed in particular 180 to 260%.

  On the other hand, the abdominal side exterior sheet 12F is basically the same as the back side body part 13 of the back side exterior sheet 12B (the part occupying the same vertical range as the side seal part by the welded part 12A group). It has a rectangular shape extending along the waistline direction, and does not have the back side extension portion 14 like the back side exterior sheet 12B.

  That is, among the upper end portion (waist portion) W and the lower portion U of the abdominal exterior sheet (abdominal body portion) 12F, the inner side surface of the inner sheet material 12 and the outer sheet material 12 are folded at the upper end portion W. Between the outer surface of the portion 12r, a plurality of ventral waist elastic elastic members 18 are vertically spaced along the width direction at a predetermined elongation rate so as to be continuous over the entire width direction. It is fixed in the stretched state. The ventral waist elastic elastic member 18 is preferably as close as possible in number, thickness, elongation rate, spacing, and vertical arrangement with respect to the back waist elastic elastic member 17, but may be different. When differentiating, the difference in number is 10 or less, preferably 5 or less, the difference in thickness is 1880 dtex or less, preferably 470 dtex or less, the difference in elongation is 100% or less, preferably 40% or less, the difference in spacing Is 10 mm or less, preferably 5 mm or less.

  Moreover, the width direction which overlaps with the interior body 200 between the outer side surface of the inner sheet-like material 12 and the inner side surface of the outer sheet-like material 12 in the lower portion U of the abdominal exterior sheet 12F (abdominal side main body). Except for the central portion, a plurality of third elongate elastic elastic members 19 are vertically extended at predetermined intervals in the upper and lower sides of the width direction so as to be continuous over the entire width direction. It is fixed in a stretched state along the width direction at a rate. Although the vertical disposition range of the third elongated elastic elastic member 19 may be a part of the lower portion, it is preferable that the third elongated elastic elastic member 19 is substantially the whole (a range in which the expansion / contraction force acts on the whole).

  The third elongated elastic elastic member 19 is preferably as close as possible to the first elongated elastic elastic member 15 in terms of the number, thickness, elongation rate, interval, and vertical arrangement, but may be different. When differentiating, the difference in number is 10 or less, preferably 5 or less, the difference in thickness is 1880 dtex or less, preferably 470 dtex or less, the difference in elongation is 100% or less, preferably 40% or less, the difference in spacing Is 10 mm or less, preferably 5 mm or less.

  The abdominal side exterior sheet 12F in the illustrated form is composed of only the portion that occupies the same vertical range as the welded portion 12A, but the ventral main body occupies the same vertical range as the welded portion 12A, similar to the back side. And it can also be set as the structure which consists of an abdominal side extension part extended under this abdominal side main-body part. Thereby, the leg periphery shape of the exterior sheet | seat 12F on the ventral side can be made into the shape fitted along a buttock. In this case, the area of the ventral extension part is preferably 10 to 80% of the area of the dorsal extension part, and more preferably 20 to 50%. If the ventral extension is excessively large, the fit is rather impaired, which is not preferable.

  On the other hand, as shown in the figure, the first, second and third elongated elastic elastic members 15, 16 and 19 are provided on both sides in the width direction except for the width direction central portion overlapping the interior body 200. However, it is preferable because the inner body 200 and the outer sheets 12F and 12B are difficult to peel off. In this form, in addition to the form in which elastic elastic members are present only on both sides in the width direction, one side in the width direction across the inner body 200 There is an elastic stretch member from one side to the other side, but the elastic stretch member is cut at the central portion in the width direction overlapping with the interior body 200, and the stretch force does not act (substantially no elastic stretch member is provided) (Equal) is also included. Also, a part of the first, second and third elongated elastic elastic members 15, 16 and 19, or the elastic force acts over the entire width direction of the back side main body part 13 and the back side extension part 14. The whole can be provided across the interior body 200 from one side in the width direction to the other side.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIG. 3, the inner body 200 includes a surface sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. On the back surface side of the liquid-impermeable sheet 11, so as to cover the entire back surface of the interior body 200, or to cover the entire portion exposed between the abdominal exterior sheet 12F and the back exterior sheet 12B, The crotch outer sheet 12M can also be fixed. In addition, an intermediate sheet (second sheet) 40 can be provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorbent element 50. Furthermore, in order to prevent excrement from leaking on both sides of the interior body 200, three-dimensional gathers 60 and 61 that stand on the body side can be provided on both sides of the interior body 200. Although not shown, the constituent members of the interior body 200 can be appropriately fixed to each other by solid, bead or spiral application such as hot melt adhesive. The interior body 200 can also be detachably attached to the exterior sheets 12F and 12B using a mechanical fastener or an adhesive material.

  In addition, in the width direction both sides of the interior body 200, particularly in the vicinity of the intersection between the width direction both side edges of the interior body 200 and the lower end edge of the abdominal exterior sheet 12F and in the vicinity of the intersection of the back side exterior sheet 12B, It is preferable that the rigidity (rigidity) of the body 200 is 15 to 50 cN / 50 mm, particularly 20 to 35 cN / 50 mm, because the overall standing shape of the three-dimensional gathers 60 and 61 as described later is further stabilized. On the other hand, for other portions, for example, the intermediate portion in the width direction, considering the flexibility, it is preferable to reduce the rigidity to 5 to 35 cN / 50 mm, preferably 10 to 25 cN / 50 mm. The range in which the rigidity is increased is a range of 5 to 30 mm in the width direction from both side edges of the interior body 200 to the center side in the width direction, and the interior body 200 and the abdominal exterior sheet 12F in the front-rear direction. It is preferable to be within 50 mm in the front-rear direction from the intersection of 12B (excluding the portion overlapping with the constricted portion 56N of the absorber 56).

  Stiffness (rigidity) is measured by the following method in accordance with JIS K 7171 (Plastic-Flexural rigidity test method). For the measurement, a tensilon tester (curvature radius R1 = 5.0 ± 0.1 mm at the tip of the indenter, radius of curvature R2 = 5.0 ± 0.2 mm at the tip of the support plate) was used, and the product 200 of the interior body 200 in the longitudinal direction. Measure the bending stiffness. The test piece is prepared by removing the elastic elastic member that affects the measurement from the inner body 200 and cutting it into a rectangle having a diaper longitudinal direction of 80 mm and a diaper width direction of 50 mm. 50 mm in the unit of the flexural rigidity value is the length of the short side of the test piece, and is the width of the test piece bent with the indenter at the time of the test. On the pair of support plates each having a tip portion having an arcuate cross-section, the interval between the tips (upper ends) of both tip portions being 50 mm, arranged in parallel with each other and the height positions of both tip portions being aligned, The test piece is placed so that its longitudinal direction is directed in a direction perpendicular to each plate, and the tip of the indenter is arranged so as to slightly touch the test piece. A load-deflection curve is obtained by lowering the indenter under conditions of a load cell of 5 kg (range 196 cN) and a speed of 30 mm / min. Let the maximum value of the obtained bending stress be a bending rigidity value (cN / 50 mm). In addition, when the site | part used as a measuring object is smaller than the said sampling dimension, it measures with a small scale test piece, and converts it by proportional calculation based on a dimension ratio.

(Surface sheet)
The top sheet 30 has a property of transmitting liquid, and examples thereof include a porous or non-porous nonwoven fabric, a porous plastic sheet, and the like. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, if flexibility and drapeability are required, the spunbond method and spunlace method are preferable. If bulkiness and softness are required, the air-through method, point bond method, and thermal bond method are preferable processing methods. .
Further, the top sheet 30 may be composed of one sheet or may be composed of a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.
When the three-dimensional gathers 60 and 61 are provided, both side portions of the top sheet 30 pass between the liquid-impermeable sheet 11 and the three-dimensional gathers 60 and 61 to the back side of the absorbent element 50 to prevent liquid penetration. Therefore, it is preferable to adhere to the liquid-impermeable sheet 11 and the three-dimensional gathers 60 and 61 with a hot melt adhesive or the like. Thereby, the effect that the rigidity of the both sides of the interior body 200 is improved is also obtained.

(Intermediate sheet)
An intermediate sheet (also referred to as “second sheet”) 40 having a higher liquid permeation rate than the top sheet 30 can be provided to quickly transfer the liquid that has passed through the top sheet 30 to the absorber. This intermediate sheet 40 not only improves the absorption performance of the absorbent by quickly transferring the liquid to the absorbent body, but also prevents the “reversed” phenomenon of the absorbed liquid from the absorbent body, so that the top sheet 30 is always dried. It can be made into the state which carried out. The intermediate sheet 40 can be omitted.
Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace, spunbond, SMS, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{20~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw fiber of the nonwoven fabric is preferably 2.2 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use an eccentric fiber, a hollow fiber, or an eccentric and hollow fiber that does not have a core at the center as the mixed fiber of all or part of the raw fiber.
The intermediate sheet 40 in the illustrated form is disposed in the center shorter than the width of the absorber 56, but may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the length of the absorbent body 56 or may be within a short length range centered on the region that receives the liquid. When the intermediate sheet 40 goes from the width direction side portion to the back surface side of the absorber 56 and is bonded and fixed with a hot melt adhesive or the like, the rigidity of both side portions of the interior body 200 is improved. A typical material of the intermediate sheet 40 is a nonwoven fabric having excellent liquid permeability.

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, the liquid-impermeable sheet 11 is substantially made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet, or a waterproof film. Non-woven fabrics that ensure liquid impermeability (in this case, a liquid-impermeable sheet is composed of a waterproof film and a non-woven fabric). Of course, in addition to this, materials having liquid impermeability and moisture permeability, which have been used and used in recent years from the viewpoint of preventing stuffiness, can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given. In addition, non-woven fabric using micro-denier fiber, strengthening leak-proofing by reducing the voids of the fiber by applying heat or pressure, and applying water-absorbing resin or hydrophobic resin or water repellent. A sheet that is liquid-impermeable without using a film can also be used as the liquid-impermeable sheet 11.
The liquid-impermeable sheet 11 is preferably extended around both sides of the absorbent element 50 to both sides of the side surface 30 of the absorbent element 50 in order to improve leakage prevention. Thereby, the effect that the rigidity of the both sides of the interior body 200 is improved is also obtained. The width of this extended portion is suitably about 5 to 20 mm on each of the left and right sides.
Further, the inner surface or the outer surface of the liquid-impermeable sheet 11 may be designed by printing or coloring. Further, a printed or colored design sheet, which is a separate member from the crotch outer sheet 12M, may be attached to the outside of the liquid-impermeable sheet 11. Moreover, the excretion indicator from which a color changes with absorption of a liquid component can be provided inside the liquid-impermeable sheet 11.

(Three-dimensional gather)
The three-dimensional gathers 60 and 61 are belt-like members extending along the both sides of the interior body 200 over the entire front-rear direction, blocking urine and soft stools that move in the lateral direction along the top sheet 30, and prevent lateral leakage. It is provided to prevent this.

  In this embodiment, as shown in FIGS. 3 and 4, double gathers 60 and 61 are provided on each of the left and right sides of the interior body 200. In the state where the diaper is unfolded, as shown in the figure, the inner three-dimensional gather 61 rises diagonally from the side of the interior body 200 toward the center in the width direction, and the outer three-dimensional gather 60 extends in the width direction of the inner three-dimensional gather 61. The outer side portion is provided so as to stand upright from the side of the interior body 200, the base side portion stands obliquely toward the center in the width direction, and the tip side portion from the intermediate portion stands obliquely outward in the width direction. To do.

More specifically, the inner three-dimensional gather 61 folds the belt-shaped gather sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction and folds it into two. A plurality of elongated elastic elastic members 63 are fixed along the longitudinal direction with a gap in the width direction. The elongated elastic elastic member 63 is not fixed to the gather sheet 62 at the front and rear end portions, and is fixed so that the three-dimensional gather extends and contracts in the middle portion. The gather sheet 62 is made of a spunbond nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), a melt-blown nonwoven fabric with excellent uniformity and concealment, and water repellent with silicon as necessary. A treated product can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m ² . As the elongated elastic elastic member 63, rubber thread or the like can be used. When spandex thread rubber is used, the thickness is preferably 420 to 1120 dtex, and more preferably 620 to 940 dtex. The elongation rate at the time of fixation is preferably 150 to 350%, more preferably 200 to 300%. Moreover, although not shown in figure, a waterproof film can also be interposed between the gather sheets folded in two.

  It is preferable to arrange one or two elongated elastic elastic members 63 at the distal end portion of the inner three-dimensional gather 61, and it is more preferable to arrange one or two elongated intermediate elastic members 63 at the intermediate portion between the distal end portion and the proximal end portion. When the elongated elastic elastic member 63 is present in the intermediate portion, it becomes easy to hit the skin against the surface in the range from the intermediate portion to the distal end portion using this as a fulcrum. The arrangement position of the elongated elastic elastic member 63 in the middle part is preferably in the range of 30 to 70% of the height of the inner solid gather 61 (length in the width direction of the protruding portion). In the infant paper diaper, since the height of the inner three-dimensional gather 61 is preferably about 15 to 35 mm, the arrangement range of the elongated elastic elastic member 63 is preferably 5 to 25 mm from the distal end to the proximal end, and is 12 to 18 mm. Is more preferable. When the elongated elastic elastic members 63 are provided in parallel at the front end portion and / or the middle portion of the inner three-dimensional gather 61, the arrangement interval 61d is preferably 2 to 10 mm, and more preferably 2 to 6 mm.

  The end of the inner three-dimensional gather 61 opposite to the folded portion in the width direction is an attachment portion (inner attachment portion) 65 fixed to the back surface of the side edge of the interior body 200. The portion is a protruding portion 66 (a portion on the folded portion side and corresponding to the inner protruding portion) protruding from the mounting portion 65, and both ends in the front-rear direction of the protruding portion 66 are hot melt adhesive on the surface of the surface sheet 30. The front and rear direction fixing portion 67 is fixed by heat sealing and the intermediate portion in the front and rear direction is an unfixed free portion (inner free portion), and the elongated elastic member 63 along the front and rear direction is fixed to the free portion in an extended state. Yes.

  The outer three-dimensional gather 60 also has basically the same structure as the inner three-dimensional gather 61, but its attachment portion (outer attachment portion) 68 is an attachment portion 65 of the inner three-dimensional gather 61 on the back side of the interior body 200. A point fixed to the outer surface of the inner three-dimensional gather 61 on the center side in the width direction, and both ends in the front-rear direction of the protruding portion (outer protruding portion) 69 pass from the mounting portion 68 to the side of the inner body 200 and are inner three-dimensional gather. A base side portion that extends to the surfaces of both end portions in the front-rear direction of the inner projecting portion 66 in 61 and is fixed to the surfaces of both end portions in the front-rear direction of the inner projecting portion 66, and is folded back outward in the width direction from the tip of the base side portion In addition, the point differs from the front end side portion fixed to the base side portion, the arrangement and number of the elongated elastic elastic members 63, and the like.

  However, the inner solid gather 61 also has a structure in which the tip of the inner protruding portion is folded outward in the width direction, specifically, not more than ½ of the height of the inner three-dimensional gather 61 (width direction length of the protruding portion), If it is preferably 1/3 or less, a structure in which the tip side portion is folded back to the outside in the width direction and fixed to the base side portion similarly to the outer three-dimensional gather 61 may be adopted.

  The number of the elongated elastic elastic members 63 provided in the free part (outer free part) of the outer three-dimensional gather 60 is preferably 2-6, and more preferably 3-5. The arrangement interval 60d is suitably 3 to 10 mm. If comprised in this way, in the range which has arrange | positioned the elongate elastic expansion-contraction member 63, it will become easy to contact | abut with respect to skin. The elongated elastic elastic member 63 may be disposed not only at the distal end side but also at the base side. Although the thickness and elongation rate of the elongated elastic elastic member 63 arranged in the outer three-dimensional gather 60 are the same as those of the inner three-dimensional gather 61, the thickness is the same as or larger than that of the inner three-dimensional gather 61, and the elongation rate is the inner three-dimensional gather. The same or lower than that of 61 is preferred.

  In addition, the front-rear direction length L6 of the front-rear fixing portion 67 of the projecting portions 66, 69 is preferably formed so that the inner three-dimensional gather 61 is the same as or shorter than the outer three-dimensional gather 60. The length of the elastic stretch member 63 in the front-rear direction is preferably formed so that the inner three-dimensional gather 61 is the same as or longer than the outer three-dimensional gather 60. The boundary between the attachment portion 65 and the protruding portion 66 may be the same position in the outer three-dimensional gather 60 and the inner three-dimensional gather 61, but the boundary of the outer three-dimensional gather 60 is the center in the width direction than the boundary of the inner three-dimensional gather 61. It is preferable to be spaced apart to the side, and the distance is preferably within 10 mm.

  It is preferable to form a linear root fixing portion by a hot melt adhesive or heat seal at the edge of the mounting portions 68 and 65 of the outer three-dimensional gather 60 and the inner three-dimensional gather 61 on the protruding portions 66 and 69 side. The other fixing parts can be fixed in an appropriate pattern using a hot melt adhesive or the like. This linear root fixing portion is located in the vicinity of the side portion on the front surface side of the interior body 200 (specifically, the position from 0 to 5 mm in the width direction from the side edge, preferably 0 to 3 mm) or the back surface side. preferable. In this case, since the three-dimensional gather is folded and fixed to the front side substantially only at both ends in the front-rear direction, in the crotch part where the restriction to the center in the width direction by the front-rear fixing part 67 does not sufficiently work Both the outer three-dimensional gather 60 and the inner three-dimensional gather 61 stand up toward the outer side in the width direction, and the pocket formed by the inner three-dimensional gather 61 becomes wider. When the linear root fixing part is positioned over 5 mm in the width direction from the side edge on the surface side, the three-dimensional gather also stands toward the center in the width direction in the crotch part, and the pocket formed by the inner three-dimensional gather 61 is narrow Therefore, it is not preferable. When located on the back surface side, a position of 0 to 20 mm from the side edge of the interior body 200 is appropriate, but may be located beyond 20 mm.

  The fixing target of the attachment portions 68 and 65 of the outer and inner three-dimensional gathers 60 and 61 can be an appropriate member such as the surface sheet 30, the liquid-impermeable sheet 11, and the absorbent element 50 in the interior body 200. The other three-dimensional gather can be fixed to the interior body 200 via one three-dimensional gather.

  In the outer and inner three-dimensional gathers 60 and 61 thus configured, the contraction force of the elongated elastic expansion and contraction member 63 acts so as to bring the both ends in the front-rear direction closer, but the both ends in the front-rear direction among the projecting parts 66 and 69 do not stand up. However, only the free part stands up so as to come into contact with the body side as shown in FIG. 3. In particular, when the attachment portions 68 and 65 are positioned on the back surface side of the interior body 200, the outer and inner three-dimensional gathers 60 and 61 stand up so as to open outward in the width direction at the crotch portion and in the vicinity thereof. The three-dimensional gathers 60 and 61 come into contact with the legs around the surface, and the fit is improved. On the other hand, on both the front and rear sides (abdomen and back) of the crotch part, the front and rear fixing parts 67 restrict the outer and inner solid gathers 60 and 61 from opening outward in the width direction. In addition, since the lower half of the outer three-dimensional gather 60 also stands up in the same manner, it is possible to reliably prevent leakage from the sides of the interior body 200 in the abdomen and back. Further, the front and rear fixing portions 67 in the protruding portion 66 of the outer three-dimensional gather 60 are not folded back, and the front and rear fixing portions 67 in the protruding portion 68 of the outer three-dimensional gather 60 are folded outward. , 61 is maintained in a separated state between the inner and outer free parts, and the outer and inner three-dimensional gathers 60, 61 are erected securely at a wide interval, and each fits around the leg, thus providing excellent leakage prevention. It will be.

The dimensions of the three-dimensional gathers 60 and 61 can be determined as appropriate. In the case of an infant paper diaper, for example, as shown in FIG. 7, the standing height of the inner three-dimensional gather 61 (the length in the width direction of the protruding portion 66 in the unfolded state). ) W5 is preferably 10 to 50 mm, particularly preferably 15 to 35 mm, and the standing height of the outer three-dimensional gather 60 (the length in the width direction of the protruding portion 69 in the unfolded state) W6 is 15 to 60 mm, particularly 20 to 40 mm. Is preferred. Further, the separation distance W4 between the tips in a state where the inner three-dimensional gather 61 is tilted to the top sheet 30 surface is preferably 60 to 170 mm, particularly 70 to 120 mm. In addition, when the outer three-dimensional gather 60 is folded flat so as to be parallel to the surface of the top sheet 30, the separation distance W3 between the innermost folds is preferably 60 to 190 mm, particularly preferably 70 to 140 mm.
Note that, unlike the illustrated embodiment, only one of the outer and inner three-dimensional gathers 60 and 61 can be provided.

(Absorption element)
The absorbent element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The packaging sheet 58 can be omitted.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening as necessary a synthetic fiber tow (fiber bundle) such as cellulose acetate, in addition to those obtained by stacking short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber basis weight can be set to, for example, about 100 to 300 g / m ² when cotton-like pulp or short fibers are stacked, and in the case of a filament aggregate, for example, about 30 to 120 g / m ^2. Can do. The fineness in the case of a synthetic fiber is 1-16 dtex, for example, Preferably it is 1-10 dtex, More preferably, it is 1-5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used. It is preferable to disperse and hold superabsorbent polymer particles in the absorber 56.

The absorber 56 may be rectangular, but as shown in FIG. 6, the front end portion 56F, the rear end portion 56B, and a constricted portion having a narrower width than those of the front end portion 56F and the rear end portion 56B. It is preferable to form an hourglass shape having 56N because the fit of the absorber 56 itself and the three-dimensional gathers 60 and 61 around the legs is improved. As specific dimensions, the length in the front-rear direction of the absorber front end portion 56F is L1, the length in the front-rear direction in the overlapping portion between the absorber 56 and the abdominal exterior sheet 12F is L2, and the absorber rear end portion 56B The length in the front-rear direction is L3, the length in the front-rear direction at the overlapping portion between the absorber 56 and the back exterior sheet 12B is L4, the minimum width of the constricted portion 56N is W1, and the width and absorption of the front end portion 56F of the absorber When the width of the body rear end portion 56B is W2, it is preferable that the body rear end portion 56B is configured to satisfy the following expressions (1) to (4).
70 mm ≦ W1 <W2 ≦ 190 mm (1)
0.5 ≦ W1 / W2 ≦ 0.85 (2)
0 mm ≦ L1-L2 ≦ 70 mm (3)
0mm ≦ L3-L4 ≦ 50mm (4)
When W1 and W2 are too narrow, the standing of the three-dimensional gathers 60 and 61 becomes unstable and the amount of absorption becomes insufficient, and when too wide, the feeling of wearing deteriorates due to a decrease in fit.

  In addition, when the value is within the above numerical range, the absorbent body 56 does not exist in the vicinity of the attachment portion 65 of the three-dimensional gathers 60 and 61 in the crotch portion, so that the degree of freedom of movement of the three-dimensional gathers 60 and 61 is increased. Is easy to open outward in the width direction, and it is easy to hit the skin with the surface, and the followability of the fit surface to the movement of the leg is improved. Since the absorbent body 56 on the side of the interior body 200 exists in a sufficient range on both the front and rear sides, the three-dimensional gathers 60 and 61 stand up with this as a base point (fulcrum). A portion extending from the front and rear sides to the crotch portion is a displacement portion in which the three-dimensional gathers 60 and 61 are opened outward in the width direction from a posture in which the three-dimensional gathers 60 erected on the width direction both side edges as a reference. The posture changes 60 and 61 are supported by the absorber 56 existing up to the side of the interior body 200, and the overall standing shape of the three-dimensional gathers 60 and 61 is stabilized. If the constricted part is too large outside the above numerical range, the degree of freedom of the three-dimensional gathers 60 and 61 becomes too high in the crotch part, and there is a risk that a gap will easily be formed around the leg, and both the front and rear sides of the crotch part There is also a possibility that the standing of the three-dimensional gathers 60 and 61 becomes unstable because there is no base point (fulcrum). Conversely, if the constricted portion is too small, the degree of freedom of the three-dimensional gathers 60 and 61 is lowered, which is not preferable.

  Furthermore, the front-rear direction length L7 of the entire constricted portion 56N is preferably 80 mm or more, and particularly preferably 120 to 260 mm. If the length L7 in the front-rear direction of the constricted portion 56N is too short, the degree of freedom of the three-dimensional gathers 60 and 61 is reduced, and the fit of the absorbent body 56 around the legs is lowered to hinder the movement of the legs. The standing of the three-dimensional gathers 60 and 61 becomes unstable.

(Superabsorbent polymer particles)
Superabsorbent polymer particles include “powder” in addition to “particles”. As the particle diameter of the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are, and those having a particle size of 1000 μm or less, particularly 150 to 400 μm are desirable. The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.
As the superabsorbent polymer, one integrated with an antibacterial substance can be used. In particular, zeolite particles obtained by substituting some or all of the ion-exchangeable ions in the zeolite with silver ions (hereinafter referred to as antibacterial deodorant zeolite) are contained in the superabsorbent polymer or antibacterial. Antibacterial deodorant superabsorbent polymer particles obtained by adhering deodorant zeolite particles to the surface of superabsorbent polymer particles by static electricity are suitable.
As the superabsorbent polymer particles, those having a water absorption rate of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.
Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the sticky feeling after liquid absorption can be suppressed effectively.
The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the amount of polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. When it exceeds 350 g / m ² , the effect is saturated.
If necessary, the superabsorbent polymer particles can adjust the spraying density or spraying amount in the plane direction of the absorber 56. For example, it is possible to increase the application amount of the liquid excretion site as compared to other sites. When gender differences are taken into account, men can increase the front spray density (amount), while women can increase the center spray density (amount). In addition, a portion where no polymer exists locally (for example, in a spot shape) in the planar direction of the absorber 56 can also be provided.

(Packaging sheet)
When the packaging sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene / polypropylene, etc. can be used as the material. The basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .
As shown in FIG. 2, the packaging sheet 58 may cover only the back surface and side surfaces of the layer, in addition to the configuration of covering the entire absorbent body 56. Although not shown, only the upper and side surfaces of the absorbent body 56 are covered with crepe paper or a nonwoven fabric, and the lower surface is covered with a liquid-impermeable sheet such as polyethylene, and the upper surface of the absorbent body 56 is covered with crepe paper or a nonwoven fabric. For example, the lower surface may be covered with a liquid-impermeable sheet such as polyethylene (each of these materials is a component of the packaging sheet). If necessary, the absorbent body 56 may be sandwiched between two upper and lower sheets or disposed only on the lower surface, but this is not desirable because it is difficult to prevent the movement of the superabsorbent polymer particles.

(Crotch exterior sheet)
A crotch outer sheet 12M exposed on the outer surface of the product is provided on the back side of the inner body 200. As a material of the crotch outer sheet 12M, the same material as the abdominal outer sheet 12F and the back outer sheet 12B can be used, but a material containing a higher-strength material or a deodorant, etc. A material different from the ventral exterior sheet 12F and the back exterior sheet 12B may be used. Specifically, a spunbond nonwoven fabric, a meltblown nonwoven fabric, a pointbonded nonwoven fabric, an air-through nonwoven fabric, an air point nonwoven fabric, a spunlace nonwoven fabric, an SMS nonwoven fabric, or the like, each made of fibers such as PP, PP / PE, PP / PET, or the like, or What added the deodorizer etc. to this can be used.
A high body pressure is applied to the crotch outer sheet 12M when sitting. Therefore, a material having a high friction fastness (not fuzzy) is preferable.
The crotch outer sheet 12M may be a sheet provided with design elements by printing or coloring. When used in combination with the above-described design sheet, it is preferable to dispose the designs so that they do not overlap.
It is preferable to use a stretchable nonwoven fabric as the crotch outer sheet 12M and to extend and paste in the longitudinal direction of the inner body 200 because the fit of the crotch part is improved.
When the crotch outer sheet 12M wraps around from the side in the width direction to the side of the body and is bonded and fixed to the outer surface of the gather sheet 62 with a hot melt adhesive or the like, the rigidity of both sides of the inner body 200 is improved. In such a form, it is preferable to use a sheet having high rigidity (roughness) as the crotch outer sheet 12M. Specifically, a sheet having a bending resistance measured by the Clark method (JISL1096 C method) and a sum of the MD direction and the CD direction of the sheet of 100 mm or more, preferably 150 mm or more may be used.
In the illustrated example, the crotch exterior sheet 12M is sandwiched between the interior body 200 and the abdominal and dorsal exterior sheets 12F and 12B where the abdomen and dorsal exterior sheets 12F and 12B overlap the interior body 200. However, it is also possible to affix it to the outside of the exterior sheets 12F and 12B on the ventral side and the back side. The crotch outer sheet 12M is affixed to the back surface of the interior body 200 and the inner or outer surfaces of the abdominal and back-side outer sheets 12F and 12B with a hot melt adhesive or the like.

<Inner / outer joint (reference form)>
Characteristically, each of the inner and outer joint portions 71 and 72 on the abdomen and the back side is a non-peeling joint portion 71 in which the end portion on the waist side does not peel off, and the crotch side portion is the end portion on the crotch side It is set as the attachment / detachment joining part 72 which can be attached or detached by the attaching / detaching means 73 provided in the. Any one of the inner and outer joints 71 and 72 on the abdominal side and the back side can be configured by only the non-peeling joint part 71 that does not peel off. In this pants-type disposable diaper, as shown in FIG. 10, the detachable joint portion 72 is removed to free the crotch side end portions of the exterior sheets 12F and 12B. By joining, the leg opening LO can be enlarged. The tucked-up state is shown only on the dorsal side (FIG. 10) and omitted on the ventral side, but the same applies to the ventral side, which can be easily understood from FIG.

  As shown in the figure, if the attachment / detachment joints 72 are provided on both the abdomen and the back, and both the abdomen exterior sheet 12F and the dorsal exterior sheet 12B are lifted up, the entire leg opening LO If only the abdominal exterior sheet 12F is lifted up (or even if the detachable joint 72 is provided only on the abdominal side), only the back exterior sheet 12B is lifted (or back) The same applies to the case where the detachable joint 72 is provided only on the side). The leg opening LO can be enlarged only on the rear side. Therefore, by enlarging the leg opening LO before wearing, the wearer's foot can be easily passed through the leg opening LO. Further, by enlarging the leg opening LO before or after the wearing, it is possible to appropriately fit a wearer with a thick leg or a wearer with a large buttocks.

  Since the non-peeling joint portion 71 is not a part to be removed in use, it is formed by a joining means that does not assume removal such as a hot melt adhesive, a heat seal, or an ultrasonic seal. Although the dimension and shape can be determined as appropriate, for example, it is desirable to set the rectangular range at the front end of the interior body 200, and the length in the width direction is about 80 to 100% of the width of the interior body 200, in the longitudinal direction. The length is preferably about 20 to 70 mm.

  The attachment / detachment means 73 for making the attachment / detachment joint portion 72 attachable / detachable may be an adhesive, but the hook material (male material) of a mechanical fastener (surface fastener) is hardly used even when attachment / detachment is repeated. It is desirable that the hook material is configured to be locked with the material to be locked. In this case, the attaching / detaching means 73 may be provided on the outer surface of the interior body 200. However, when a hook material is used as the attaching / detaching means 73, the hook material is exposed when the exterior sheets 12F and 12B are lifted up, and is attached to underwear or clothes. There is a risk of erroneous locking. Therefore, it is preferable that the hook material is provided on the inner surface of the exterior sheets 12F and 12B and is configured to be locked to the outer surface of the interior body 200. In the illustrated embodiment, the above-mentioned crotch outer sheet 12M is extended in the front-rear direction to be a locked material. However, a separate loop material (a sheet having a number of loops formed on the surface, also referred to as a female material). ) May be provided.

  The dimension and shape of the detachable joint portion 72 can be determined as a portion excluding the non-peeling joint portion 71 in the overlapping portion between the interior body 200 and the exterior sheets 12F and 12B on the ventral side and the back side. Further, the length in the width direction of the attaching / detaching means 73 is about 30 to 100% of the attaching / detaching joining portion 72 and about 20 to 70% of the attaching / detaching joining portion 72 (when the hook material is provided on the inner surface of the exterior body as shown in the figure). It is desirable that the attaching / detaching means 73 is preferably sufficiently separated from the non-peeling joint portion 71) in order to facilitate tapping.

  As shown in FIG. 2 and FIG. 9, in the form in which the back inner and outer joints 71, 72 have the detachable joint 72, the waist line extends from the crotch edge to the center in the width direction of the back exterior sheet 12 </ b> B. It is also preferable to form the heel part cutting perforation 80 toward the side. In this embodiment, as shown in FIG. 11, while removing the detachable joint portion 72 on the back side, detaching the buttock perforation 80, and detaching and joining again with the crotch side of the back exterior sheet 12B widened to the left and right By joining by the portion 72, the leg opening LO can be expanded rearward without raising the back side exterior sheet 12B, that is, while maintaining the covering of the lower side of the buttocks by the back side exterior sheet 12B. . Of course, it is also possible to combine raising of the back exterior sheet 12B.

  Further, as shown in FIG. 12, one end portion 91 of the lifting member 90 is fixed to the crotch side end portion of the crotch side end portion and the waist side portion of the side seal portion 12A. It is also proposed to insert the end side into the waist part. In the illustrated embodiment, a thread is used as the lifting member 90, and the side seal portion 12A is not formed by welding, but is formed by side-by-side sewing with the thread as the lifting member, and only the crotch side end 91 is fixed. The other end is projected from the end on the waist side of the exterior sheets 12F and 12B. By providing the lifting member 90 as described above, the exterior sheet 12F is obtained by picking and pulling up the other end of the lifting member 90 from the product state shown in FIG. 12A, as shown in FIG. 12B. , 12B can be easily tucked up.

<Embodiment of the present invention>
On the other hand, in the above-mentioned reference form, the exterior sheets 12F and 12B are lifted up, so that a surplus portion is generated, which affects the appearance and the feeling of wearing. Therefore, in the present invention, as shown in FIG. 13, the crotch side edges are provided on the exterior sheet having the attachment / detachment joint 72, that is, in the illustrated form, both the abdominal exterior sheet 12 </ b> F and the back exterior sheet 12 </ b> B. It is proposed to provide edge cut perforations 85 for cutting across the entire width direction. A plurality of perforations 85 are preferably provided at intervals in the vertical direction, but may be one.

  In this pants-type disposable diaper, as shown in FIG. 14, the crotch side edge portion 12E is cut across the entire width direction by the edge cut-off perforations 85, and the portion 12E is separated from the interior body 200 by peeling off the peeling joint portion. By doing so, the leg opening LO can be enlarged. In addition, at this time, the leg opening LO can be enlarged without lifting up the exterior sheets 12F and 12B (that is, without wrinkling). The enlarged state is shown only on the dorsal side (FIG. 14) and omitted on the ventral side, but the same applies to the ventral side, which can be easily understood from FIG.

  In the illustrated embodiment, if the crotch side edges of both the abdominal and back side exterior sheets 12B are separated, the entire leg opening LO can be enlarged, and only the abdominal exterior sheet 12F separates the crotch side edges. If this is done (or the attachment / detachment joint 72 is provided only on the abdomen side), the crotch side edge is separated only in the front and the back exterior sheet 12B only (or the attachment / detachment joint 72 is provided only on the back side). The leg opening LO can be enlarged only backward.

  In addition, in the form in which the leg opening LO is enlarged by the edge cut-off perforation 85, the cut-off portion 12E is not attached again, so instead of the attachment / detachment joint portion 72 by the attachment / detachment means 73 as shown in the example, It can also be set as the peeling joining part joined so that peeling was possible by adhere | attaching or welding weakly. Others are the same as the reference form which has the above-mentioned attachment / detachment joining part 72.

  The present invention can be used as a pants-type disposable diaper.

  DESCRIPTION OF SYMBOLS 100 ... Trunk part, 11 ... Liquid impervious sheet, 12F ... Abdominal side exterior sheet, 12B ... Back side exterior sheet, 12A ... Side seal part, 200 ... Interior body, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Side solid gather, 62 ... Gather sheet, 71, 72 ... Inside / outside joint, 71 ... Non-peeling joint, 72 ... Detachable joint, 73 ... Detachment means, 80 ... perforation cut-off perforations, 85 ... edge cut-off perforations, 90 ... lifting members, LO ... leg openings.

Claims (1)

A cylindrical waistline formed by joining both sides of the abdominal exterior sheet and both sides of the exterior exterior sheet;
An interior body that is an excretion absorbing portion extending from the inner surface of the exterior sheet on the ventral side to the inner surface of the exterior sheet on the back side,
The ventral side exterior sheet and the back side exterior sheet are spaced apart from each other without being continuous on the crotch side,
In a pants-type disposable diaper having an overlapping part between the inner body and the abdominal exterior sheet, and an inner and outer joint part that respectively joins the overlapping part between the interior body and the back exterior sheet,
At least one of the inner and outer joints on the ventral side and the back side is a non-peeling joint where the end on the waist side is not peeled off, and a peeled joint where the crotch part is peelable from the joint that does not peel off Has been
In the exterior sheet on the side having the peel joint, an edge cut perforation is provided for cutting the crotch side edge over the entire width direction,
A pants-type disposable diaper characterized by that.

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