JP5008491B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper that prevents back leakage.

Most disposable diapers are a part that extends from the lower abdomen through the crotch part to the buttocks along the center in the width direction, and a liquid-permeable top sheet that forms the body side surface; Absorbent main body part, which is a part where the absorbent element is interposed between the liquid-impermeable sheet positioned, and a part extending to the front side and the rear side of the absorbent main body part, and having no absorbent element It has a ventral side and a back end flap part which are parts. Fastening pieces (tape type) are provided with fastening pieces on both sides on the back side, and these fastening pieces are attached to the outer surface of the ventral side. Both side portions on the side and both side portions on the abdomen side are joined, and a waist opening and a leg opening are formed in advance, and wearing is performed by pulling the leg opening through the leg to the waist.
The stationary disposable diaper is more likely to have a gap between the body and the back side of the diaper than the so-called underpants type, and excrement such as urine, watery stool, and loose stool leaks through this gap ( There is a problem that so-called back leakage is likely to occur. Therefore, conventionally, it has been proposed to improve the stretchability in the product width direction on the back side, and to provide a back side barrier body along the width direction on the back side inner surface (see, for example, Patent Documents 1 to 6). .
JP-A-10-328234 Japanese Patent No. 3638819 JP 2001-245922 A Japanese Patent Laid-Open No. 9-215709 Japanese Patent No. 3602134 Japanese Patent No. 3605426

However, all of the conventional ones are difficult to fit into the three-dimensional unevenness of the body surface.
On the other hand, pants-type disposable diapers are more fit to the body than the fixed type and are less likely to leak back. When external pressure due to weight or the like is applied at the time of replacement, excrement may be pushed out and leak out. Of course, such a leak also occurs in the stationary type. In particular, since the absorbent body of a recent diaper is thin and flexible, such a tendency is strong.
Furthermore, in a pants-type disposable diaper, there is also a problem that urine tends to leak before using a particularly thin absorbent body in order to improve fit.
Then, the main subject of this invention is providing the disposable diaper which is excellent in the fitting property with respect to the three-dimensional unevenness | corrugation of the body surface, and can prevent a leak effectively also with respect to the leakage of the excrement especially by external pressure.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A liquid-permeable top sheet that extends from the lower abdomen along the center in the width direction through the crotch to cover the buttocks and that forms the body-side surface, and a liquid impervious located on the outer surface side An absorbent main body that is a portion where an absorber is interposed between the sheet and the sheet,
A disposable diaper, wherein a bar-like barrier body protruding on the body side extends along the width direction so that at least one of the back-side upper end part and the abdominal side upper end part overlaps at least the absorbent body in the width direction. ,
The barrier body is formed by packing a compression-recoverable material in a package formed by forming a sheet into an elongated cylinder, and the compression-recoverable material is packed at least in a portion where the width direction range overlaps the absorber. der thing is is,
The barrier body has an initial thickness T0 of 5 to 20 mm, a compression stiffness LC in the thickness direction of 0.75 to 0.99, and a compression energy WC in the thickness direction of 6.000 to 9.500 gf · cm / cm ² and the compression resilience RC in the thickness direction is 40 to 70%,
The compressible material is an assembly of crimped filaments or an assembly of staples;
The barrier body has a shape in which the thickness becomes thinner toward both ends of the diaper width direction, and the initial thickness T0 is thicker than the initial thickness T0 of the portion having the absorber.
A disposable diaper characterized by that.

(Function and effect)
The barrier body of the present invention is a rod-shaped body in which a compression-restorable material is packed in a package, and has a three-dimensional shape as well as each part can be independently and freely deformed, so that the body surface is complicated and three-dimensional. Fits well against uneven surfaces. In addition, since a space apart from the body is secured on the crotch side of the barrier body, the amount of excrement damming is significantly increased, and excrement dammed by the barrier body even when external pressure is applied is contained in this space. It is difficult for a situation to occur that the excrement is pushed out and leaked. In addition, compression decompression | restoration means the property to which a shape decompress | restores toward the original volume when releasing compression force from a compression state, and the thing which decompress | restores only part is included besides what restore | restores a volume completely. Moreover, the vertical direction when referring to the back upper end and the abdominal upper end of the diaper means the direction in the wearing state with the crotch down, and when the barrier body is provided on the back side, When it is provided on the rear side or the back side upper end, and on the ventral side, it means the front end or the upper side of the diaper.

In addition, the thickness of the barrier body and the compression / restoration property can be determined as appropriate. For example, when a watery stool or soft stool dam is used in an infant diaper, a barrier body having the characteristics described in this section is preferable. The initial thickness T0 means the thickness at a pressure of 0.5 gf / cm ^{2, and} the compression stiffness LC is a value that means that the compression stiffness is closer to 1, and the compression energy WC is larger and the compression is easier. The compression resilience RC is a value that means that as the value is closer to 100, the resilience to compression is better, and can be measured by a KES-FB3-AUTO-A automated compression tester.

In addition, when the fiber assembly as described in this section is used as the compression-restorable material of the present invention, the barrier body is particularly independent of each part during deformation, and can be formed into an arbitrary three-dimensional shape. In addition, the elasticity is weak and a soft feel is preferable.

Furthermore, it is preferable that the barrier body has a shape as described in this section because the fit to the waist curve is enhanced, and in particular, a gap is not easily formed between both ends of the barrier body 20 and the body.

<Invention of Claim 2 >
The packaging body continuously extends from one end to the other end in the width direction of the diaper, and includes a main portion including at least a portion where the absorbent body and the width direction range overlap, and both end portions located on both sides in the width direction. The disposable diaper according to claim 1, wherein the compression-recoverable material is packed therein and the compression-recoverable material is not packed in both ends.

(Function and effect)
In a diaper production line, a continuous sheet base material is placed on a roll and conveyed, and each part is sequentially attached to the part that becomes a diaper, and then cut into individual products at the final stage. Such a method is widely adopted. And when attaching elongate components like a barrier body, it is preferable to cut | disconnect simultaneously in the step which supplies and attaches a continuous component, and cuts into an individual product at the final stage. However, when the barrier body is attached by such a method, if the compression-recoverable material is packed in the entire longitudinal direction, a thick barrier body including the unnecessary part such as the side part is provided. And the side part is undesirably swollen. On the other hand, when having the structure as described in this section, only the package is continuous along the width direction of the diaper, and the main part containing the compression-recoverable material is not continuous. It is possible to adopt a form that is supplied and attached in a state and cut at the same time in the stage of cutting into individual products in the final stage, and it is also possible to prevent the side parts from bulging undesirably.

<Invention of Claim 3 >
The sheet forming the package has an initial thickness T0 of 0.05 to 1 mm, a bending stiffness B of 1 to 100 gf · cm ² / cm, and a bending hysteresis 2HB of 1 to 20 gf · cm / cm. The disposable diaper according to claim 1 or 2 .

(Function and effect)
The sheet of the package can be determined as appropriate, but using an excessively hard or non-flexible sheet will inhibit the deformation of the compression-recoverable material and the barrier body will become hard. Sheet is preferred. The larger the bending stiffness B is, the greater the bending stiffness is. The larger the bending hysteresis 2HB is, the greater the bending recovery property is. KES-FB2-AUTO-A Automated Pure Bending Test It can be measured by each machine.

<Invention of Claim 4 >
The disposable diaper of any one of Claims 1-3 whose sheet | seat which makes the said package is a water-repellent nonwoven fabric.

(Function and effect)
Since the barrier body blocks the excrement containing the liquid, the sheet forming the package is preferably a water-repellent nonwoven fabric. Thereby, exudation of excrement can be prevented.

<Invention of Claim 5 >
The disposable diaper according to any one of claims 1 to 4 , wherein the sheet forming the package is a hydrophilic nonwoven fabric, and the compression-recoverable material is a liquid-absorbing material.

(Function and effect)
Although the barrier body blocks the excrement containing the liquid component, the absorption of the excrement can be partially borne by being configured as described in this section.

<Invention of Claim 6 >
It is a part extending to the rear side of the absorbent main body part, and a part extending to the front side of the absorbent main body part, and a back end flap part which is a part not having the absorber, And having a ventral end flap portion which is a portion not having the absorber,
The disposable body according to any one of claims 1 to 5 , wherein the barrier body is provided in the end flap portion, and a crotch side end of the barrier body and an upper end of the absorber are separated from each other. Diapers.

(Function and effect)
Thus, it is preferable that the crotch side end of the barrier body and the upper end of the absorber are separated from each other, because a larger space is secured from the body on the crotch side of the barrier body. In addition, the vertical direction when referring to the upper end of the absorber means the direction in the wearing state with the crotch down, and when the barrier body is provided on the back side, the rear end or the back upper end of the absorber In the case of being provided on the ventral side, it means the front end or the ventral upper end of the absorbent body.

<Invention of Claim 7 >
Side barrier cuffs that stand on the use surface side are provided on both sides of the diaper along the front-rear direction.
Each side barrier cuff is a fixed portion in which the outer portion in the width direction is fixed to the side portion of the diaper, and both of the inner portions in the width direction are fixed portions that are fixed to the diaper in the front-rear direction. The front-rear direction range between the fixed parts is a free part,
The fixing part of the side barrier cuffs is located on the outer side in the width direction than the absorber,
The width direction range of the portion including the compression-recoverable material in the barrier body is not less than the width direction range from one side edge of the absorber to the other side edge, and from the fixing part of one side barrier cuff. The width direction range to the fixed part of the other side barrier cuffs is below,
The disposable diaper of any one of Claims 1-6 .

(Function and effect)
In a general disposable diaper, in order to prevent leakage from around the legs, side barrier cuffs standing on the use surface side are provided on both sides of the diaper along the front-rear direction. In such a structure, the barrier body of the present invention is preferably provided over the range described in this section.

<Invention of Claim 8 >
The portion of the barrier body that encloses the compression-recoverable material is continuously continuous along the diaper width direction with a joining width corresponding to 1/16 to 1/2 of the outer periphery of the packaging body in the cylindrical state. The disposable diaper according to any one of claims 1 to 7 , wherein the disposable diaper is joined to a member located on a back side of the barrier body, and a portion other than the joined portion is not joined to an adjacent member.

(Function and effect)
When the barrier body is joined in this way, the degree of freedom of deformation of the barrier body can be increased without impairing the fit to the body, and the upper side of the joint portion of the barrier body is the crotch side. Since the excrement can be received under the protruding portion, the damming effect is further enhanced.

<Invention of Claim 9 >
The disposable diaper according to claim 8 , wherein the joint width is expanded at least to the crotch side as it goes to both sides of the diaper width direction.

(Function and effect)
By being configured as described in this section, the excrement blocked by the barrier body is difficult to spread outward in the diaper width direction.

<Invention of Claim 10 >
Of the both ends of the diaper in the diaper width direction and the intermediate portion between the compression-recoverable material of the barrier body,
At both ends of the diaper width direction, the back surface is joined to a member located on the back side of the barrier body with a joining width corresponding to 1 / 2-5 mm of the outer periphery in the cylindrical state of the package body to 1/2 of the outer periphery. In addition, the part other than this joint is not joined to the adjacent member,
In the middle part of the diaper width direction, the back surface is continuously located on the back side of the barrier body along the diaper width direction with a joining width corresponding to 1/16 to 1/2 of the outer periphery of the package body in the cylindrical state. The disposable diaper according to any one of claims 1 to 9 , wherein the disposable diaper is bonded to a member and a portion other than the bonded portion is not bonded to an adjacent member.

(Function and effect)
By being configured as described in this section, the barrier body in the middle part of the diaper width direction protrudes toward the crotch side with respect to the joint part, and includes a part corresponding to the protrusion part on both sides. Since it is joined, the excrement received under the protruding part is surrounded, and the movement to the outer side in the width direction is blocked.

<Invention of Claim 11 >
On the back side of the thickness direction center of the part containing the compressed resilient material of said barrier member, the elastic member is fixed in a stretched state along the diaper width direction, in any one of claims 1-10 The disposable diaper described.

(Function and effect)
When the elastic member is provided in this manner, the portion of the barrier body containing the compression-restorable material is warped so as to bulge toward the body side toward the center side in the diaper width direction, and the fit to the waist shape of the waist is enhanced. Therefore, it is preferable.

<Invention of Claim 12 >
The elastic member is fixed in a state where the elastic member extends along the diaper width direction from the center in the thickness direction in the portion of the barrier body containing the compression-restorable material, to any one of claims 1 to 11. The disposable diaper described.

(Function and effect)
It is preferable to provide the elastic member in this manner, because it is possible to prevent the barrier body from warping or to force the cross-sectional shape of the barrier body.

<Invention of Claim 13 >
A water-repellent nonwoven fabric is provided on the back side of the barrier body, the water-repellent nonwoven fabric is folded back on the body side at the front and rear ends of the diaper, and at least the surface of the barrier body on the upper side of the diaper is covered by the folded portion the disposable diaper according to any one of clauses 1-12.

(Function and effect)
When the edges of the sheet are exposed at the front and rear ends of the diaper, the touch becomes worse. In particular, in the case of a pants-type disposable diaper, the exterior body and the interior body having the absorbent body are formed as separate bodies. Therefore, when the edge of the interior body is exposed, the step with the exterior body deteriorates the touch. Let For this reason, the water-repellent nonwoven fabric constituting the exterior body is folded back to the body side at the front and rear ends of the diaper so as to cover the corners of the sheet at the front and rear ends of the diaper and to cover the front and rear ends of the interior body. The invention described in this section utilizes a water-repellent nonwoven fabric positioned on the back side of such a barrier body, and folds the water-repellent nonwoven fabric to the body side at the front and rear ends of the diaper to cover at least the surface of the diaper at the upper end side. In addition, it prevents exudates from exuding through the barrier body. The vertical direction when referring to the upper end of the diaper means the direction in the wearing state with the crotch down, and if the barrier body is provided on the back side, the rear end or back side upper end of the diaper, When provided on the ventral side, it means the front end or the ventral upper end of the absorber.
<Invention of Claim 14>
At the time of wearing, it is a stationary disposable diaper that locks fastening pieces provided on both sides of the back side to the ventral side outer surface,
Between the fastening pieces, there is provided a belt-like back side elastic sheet that elastically expands and contracts in the width direction, and this back side elastic sheet is elastic in the width direction by an elastic expansion member fixed in an extended state along the width direction. It is configured to expand and contract,
The disposable diaper according to any one of claims 1 to 13, wherein a portion of the barrier body that encloses the compression-restorable material is fixed to the upper back side of the back side of the elastic member of the back side elastic sheet. .

  As described above, according to the present invention, there are advantages such as excellent fit to the three-dimensional unevenness of the body surface and effective prevention of leakage even when excrement leaks due to external pressure.

  Below, the example of the basic structure of a fixed type and underpants type disposable paper diaper is demonstrated. In each figure, “front-rear direction” means a direction connecting the ventral side (front side) and back side (rear side), “width direction” means a direction (left-right direction) orthogonal to the front-rear direction, “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 part so that the both sides of the front body and the back side of the diaper are overlapped, in other words It means the direction connecting the waist opening WO side and the crotch part side.

<An example of the basic structure of fixed disposable diapers>
1 to 5 show an example of a stationary disposable diaper according to the present invention. 2, FIG. 3, FIG. 4 and FIG. 5 are diagrams showing a cross section taken along line 2-2 in FIG. 1, a cross section taken along line 3-3, a cross section taken along line 4-4, and a cross section taken along line 5-5, respectively. This fixed disposable diaper is a part that extends from the lower abdomen along the center in the width direction through the crotch to cover the buttocks, and a liquid-permeable top sheet that forms the body side surface, and an outer surface An absorbent main body 10 that is a portion where the absorber 56 is interposed between the liquid-impermeable sheet positioned on the side, and a portion that extends to the front side and the rear side of the absorbent main body portion 10, respectively. And it has the abdominal side end flap part FE and back side end flap part BE which are parts which do not have the absorber 56. FIG.
The fixed disposable diaper includes a pair of abdominal side flap portions FF, FF extending to the outside in the width direction from the crotch portion C on both sides of the upper edge F1 side portion of the abdominal side F, and the back side. On both sides of the upper edge B1 side portion of B, a pair of back side flap portions BF, BF extending to the outside in the width direction from the crotch portion C are provided. Moreover, the fastening piece 130 as a locking member is provided in the back side flap part BF and BF, respectively.
More specifically, the entire outer surface of the absorbent main body 10 and the side flap portions BF and FF on the back side and the abdomen side is formed by the exterior sheet 12. In particular, in the absorbent main body 10, a liquid-impermeable sheet 11 is fixed to the inner surface side of the exterior sheet 12 with an adhesive such as a hot-melt adhesive, and an absorbent element is further disposed on the inner surface side of the liquid-impermeable sheet 11. 50, the intermediate sheet 40, and the top sheet 30 are laminated in this order. The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, have slightly larger dimensions in the front-rear direction and the width direction than the absorbent element 50, and are eaten from the side edges of the absorbent element 50 in the top sheet 30. The peripheral edge that protrudes and the peripheral edge that protrudes from the side edge of the absorbent element 50 in the liquid-impermeable sheet 11 are fixed by a hot melt adhesive or the like. The liquid-impermeable sheet 11 is made of a moisture-permeable polyethylene film or the like and is formed to be slightly wider than the top sheet 30.
Further, side barrier cuffs 60, 60 projecting (standing) on the skin side of the wearer are provided on both sides of the absorbent main body 10, and a barrier sheet forming the side barrier cuffs 60, 60 is provided. 62 and 62 are extended over the whole width direction outer side of the absorptive main-body part 10 including the inner surface of each side flap part BF and FF of back side and abdominal side.

Hereinafter, the material and the characteristic part of each part are demonstrated in order.
(Exterior sheet)
The exterior sheet 12 is a part that supports the absorbent element 50 and is attached to the wearer. The exterior sheet 12 has an hourglass shape in which the center part in the front-rear direction on both sides is constricted, and this is a part into which the wearer's leg is placed.
The exterior sheet 12 is preferably a non-woven fabric, but is not limited thereto. The type of the nonwoven fabric is not particularly limited, and as the material fiber, for example, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, and natural fibers such as cotton are used. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved. In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can be used. In the latter case, the nonwoven fabrics 12 are preferably bonded to each other with a hot melt adhesive or the like. When using a nonwoven fabric, the fabric weight is preferably 10 to 50 g / m ² , particularly 15 to 30 g / m ² .

(Top sheet)
The top sheet 30 is sufficient if it has liquid permeability, and for example, a porous or non-porous nonwoven fabric or a porous plastic sheet can be used. 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, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.
The top sheet 30 may be composed of a single sheet or 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.

(Intermediate sheet)
An intermediate sheet (also referred to as a second sheet) 40 can be provided between the top sheet 30 and the absorbent element 50 in order to move excrement that has passed through the top sheet 30 to the absorbent body and prevent reversal. This intermediate sheet 40 not only quickly transfers the excrement to the absorber to enhance the absorption performance by the absorber, but also prevents the excretion of the absorbed excrement from returning from the absorber and improves the feel of the top sheet 30 surface. To do. The intermediate sheet 40 can be omitted.
As the intermediate sheet 40, the same material as the top sheet 30 can be used. The intermediate sheet 40 is preferably bonded to the top sheet 30. When heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 40 preferably has the same melting point as the top sheet 30. Further, considering the permeation of the solid content in the stool, the fineness of the fiber used for the intermediate sheet 40 is preferably 5.0 to 7.0 dtex, but the liquid residue in the top sheet 30 increases. On the other hand, when the fineness of the fiber used for the intermediate sheet 40 is 1.0 to 2.0 dtex, the liquid residue of the top sheet 30 hardly occurs, but the solid content of the stool is difficult to permeate. Therefore, it is preferable that the fiber of the nonwoven fabric used for the intermediate sheet 40 has a fineness of about 2.0 to 5.0 dtex.
The intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbent element 50, but may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the entire length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length range centered on the region that receives the liquid.

(Side barrier cuffs)
In order to prevent urine and soft stool that move laterally on the top sheet 30 and prevent lateral leakage, side barrier cuffs 60, 60 that protrude (stand up) on the use surface side are provided on both sides of the product. Is preferred.
The side barrier cuff 60 includes a barrier sheet 62 that is substantially continuous in the width direction, and an elongated elastic elastic member 63 that is fixed to the barrier sheet 62 in a stretched state along the front-rear direction. As the barrier sheet 62, a water-repellent nonwoven fabric can be used, and as the elastic elastic member 63, thread rubber or the like can be used. As shown in FIGS. 1 and 2, a plurality of elastic elastic members can be provided in addition to a plurality of elastic expansion members.
The inner surface of the barrier sheet 62 has a fixing start end in the width direction on the side portion of the top sheet 30, and a portion on the outer side in the width direction from the fixing start end is on the side portion of the liquid-impermeable sheet 11 and on the outer side in the width direction. It fixes to the side part of the exterior sheet | seat 12 located by the hot-melt-adhesive etc. Out of the adhering portions, on the outer side in the width direction in the vicinity of the adhering start end, leg elastic elastic members 64 made of rubber thread or the like are provided along the front-rear direction between the sheets of the portions where the barrier sheet 62 and the exterior sheet 12 face each other. It has been.
Around the leg, the width direction inner side of the side barrier cuff 60 is fixed on the top sheet 30 at both ends in the longitudinal direction of the product, but the portion between them is an unfixed free part. The portion comes to stand by the contraction force of the rubber thread 63. When the diaper is worn, the diaper is attached to the body in the shape of a boat, and the contraction force of the rubber thread 63 acts, so that the side barrier cuffs 60 stand up and adhere to the legs around the contraction force of the rubber thread 63. . As a result, so-called side leakage from around the legs is prevented.
Unlike the illustrated embodiment, the front and rear direction end portions of the barrier sheet 62 on the inner side in the width direction are divided into a base end side portion extending from the outer side in the width direction to the inner side in the width direction and a center side in the width direction of the base end side portion. It is also possible to fix in a double-folded state having a distal end side portion that is folded back from the edge toward the body side and extends outward in the width direction, and the portion in between can be an unfixed free portion.

(Absorption element)
The absorption element 50 is a part that absorbs and holds liquid such as urine and loose stool. The absorbent element 50 includes an absorbent body 56 and a covering sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The covering sheet 58 can be omitted. The absorbent element 50 can be adhered to the inner surface of the liquid-impermeable sheet 11 via an adhesive such as a hot melt adhesive on the back surface.

(Absorber)
The absorber 56 can be formed by an aggregate of the fibers 52 and 52. As this fiber assembly, a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as 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.

(Superabsorbent polymer particles)
As shown in FIG. 2, the absorbent body 56 preferably includes superabsorbent polymer particles 54, 54..., In particular, at least in the liquid receiving region, the superabsorbent polymer particles with respect to the aggregate of fibers 52, 52. It is desirable that (SAP particles) be dispersed substantially throughout the thickness direction.
If there is no SAP particle in the upper part, the lower part, and the middle part of the absorber 56, or if there is very little, it cannot be said that the "absorbed throughout the thickness direction". Therefore, “distributed in the entire thickness direction” means “distributed unevenly in the upper part, the lower part, and / or the middle part of the aggregate of fibers in addition to the form“ uniformly ”distributed in the entire thickness direction. However, it is still included in the form of being dispersed in the upper, lower and middle portions. Further, a form in which some SAP particles do not penetrate into the aggregates of the fibers 52, 52. The form on the sheet 58 is not excluded.
The superabsorbent polymer particles 54 include “powder” in addition to “particles”. As the particle diameter of the superabsorbent polymer particles 54, those used for 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 54 can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. Examples of the superabsorbent polymer particles 54 include starch-based, cellulose-based and synthetic polymer-based ones, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, sodium carboxymethylcellulose A cross-linked product or an acrylic acid (salt) polymer can be used. The shape of the superabsorbent polymer particles 54 is preferably a granular material that is usually used, but other shapes can also be used.
As the superabsorbent polymer particles 54, those having a water absorption speed 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.
The basis weight of the superabsorbent polymer particles 54 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. If it exceeds 350 g / m ² , not only will the effect be saturated, but an excessively high superabsorbent polymer particle 54 will give a sense of incongruity.

(Enveloping sheet)
When the covering 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 instead 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 fiber basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .
As shown in FIG. 2, the covering sheet 58 wraps only the back and side surfaces of the continuous fiber 52, 52... And the superabsorbent polymer particles 54, 54. It may be covered. 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 becomes a component of the covering sheet). If necessary, the aggregate of continuous fibers 52, 52... And the layer of superabsorbent polymer particles 54, 54... May be sandwiched between two upper and lower sheets or disposed only on the lower surface. This is not a desirable form because it is difficult to prevent the movement of particles.

(Fastening piece)
The fastening piece 130 has a base portion of a fastening base material 130C made of a nonwoven fabric, a plastic film, a polylaminated nonwoven fabric, paper, or a composite material thereof attached to the diaper, and serves as a locking portion for the abdomen on the tip side portion protruding from the diaper. A hook element 130A of a mechanical fastener is provided. The hook element 130A is bonded to the fastening substrate 130C by an adhesive so as not to be peeled off.
In the diaper for infants up to about 12 months in which a watery stool and soft stool are frequently excreted, which is particularly preferable to apply the present invention, the length in the width direction of the diaper among the dimensions of the attachment portion of the fastening piece 130 The length X1 is preferably 10 to 50 mm, particularly preferably 20 to 40 mm, and the longitudinal length Y1 is preferably 20 to 100 mm, particularly preferably 40 to 80 mm. Of the dimensions of the front end portion of the fastening piece 130, the length X2 in the width direction of the diaper is preferably 30 to 80 mm, particularly 40 to 60 mm, and the length Y2 in the front-rear direction is 20 to 70 mm, particularly 25. It is preferably ˜50 mm. In addition, when a part or all of the fastening piece 130 has, for example, a substantially tapered shape, and the lengths Y1 and Y2 in the front-rear direction and the lengths X1 and X2 in the width direction are not constant, the numerical range is determined by an average value. The shape of the fastening piece 130 may be a left-right symmetric shape such as a rectangular shape. However, if the fastening piece 130 is a convex shape composed of a wide attachment portion and an elongated tip-side portion, the knob on the tip-side portion can be easily picked and This is preferable because the tension between the bases of this region acts over a wide range. The hook element 130A has a large number of engaging protrusions on the outer surface side thereof. The shape of the engaging protrusion is (A) Le-shaped, (B) J-shaped, (C) Mushroom-shaped, (D) T-shaped, (E) Double J-shaped (J-shaped And the like may be any shape. Instead of the hook element 130 </ b> A, an adhesive layer can be provided as a locking portion of the fastening piece 130.
When the diaper is worn, the fastening piece is locked at a proper position on the outer surface of the abdominal side F with the back side flap portion BF overlapped on the outside of the abdominal side flap portion FF. The position and size of the fastening portion of the fastening piece 130 can be arbitrarily determined. In diapers for infants up to about 12 months from the newborn, the locking location is a rectangular range of 20 to 80 mm in the front-rear direction and 150 to 300 mm in the width direction, and the separation distance in the height direction between the upper edge and the ventral upper edge F1 It is preferably 0 to 60 mm, particularly 20 to 50 mm, and the center in the width direction of the product.
It is preferable to provide a target tape 74 at the locking position of the fastening piece 130 on the ventral side F in order to facilitate locking. As the target tape 74, when the hook portion is the hook element 130A, a tape having a large number of loop yarns on which the engaging projections of the hook element are entangled can be used. A film having a smooth surface that is rich in properties can be used.
Further, when the fastening portion of the fastening piece 130 on the ventral side F is made of a nonwoven fabric, for example, when the exterior sheet 12 of the illustrated form is made of a nonwoven fabric, and the fastening portion of the fastening piece 130 is the hook element 130A, The target tape 74 can be omitted, and the hook element 130A can be entangled with the nonwoven fabric of the exterior sheet 12 and locked.
When the fastening piece 130 is attached so that the attachment portion of the fastening piece 130 overlaps the boundary line between the back end flap portion BE and the absorbent element 50, the tension acting between the attachment portions of the left and right fastening pieces 130 when the diaper is attached. This is preferable because the back side end of the absorbent element 50 is firmly pressed against the body. Moreover, if the attachment part of the fastening piece 130 is too far from the back side end part (rear end part) of the diaper, the tension acting between the attachment parts of the left and right fastening pieces 130 when the diaper is mounted is the back side end part of the diaper. Therefore, a gap is likely to occur between the back end of the diaper and the body surface. Therefore, the length in the front-rear direction of the back end flap BE is preferably the same as or shorter than the length in the front-rear direction of the base portion of the fastening piece 130.

(End flap)
The end flap part is a part that extends to the front side and the rear side of the absorbent main body part 10 and does not have the absorber 56, and the front side extension part is the ventral end flap part FE. The extended portion on the rear side is the back end flap portion BE.
The length in the front-rear direction of the back end flap BE is preferably the same as or shorter than the length in the front-rear direction of the attachment portion of the fastening piece 130 for the reasons described above. If it is too close, a gap is likely to be formed between the diaper dorsal side end and the body surface due to the thickness and stiffness of the absorbent body 56, so that it is preferably 10 mm or more.
The front-rear direction lengths of the ventral end flap part FE and the back end flap part BE are preferably about 5 to 20% of the front-rear direction length L of the entire diaper, and it is particularly preferable to apply the present invention. In a diaper for infants up to about 12 months, which frequently excretes watery stool and soft stool, it is appropriate that the diameter is 10 to 60 mm, particularly 20 to 50 mm.

(Back elastic sheet)
In the illustrated embodiment, a belt-like back-side elastic sheet 70 that elastically expands and contracts in the width direction is provided between both fastening pieces 130 to improve the fit in the diaper back side. Both end portions of the back-side elastic sheet 70 are preferably extended to a portion that overlaps with the attachment portions of both fastening pieces 130, but may be spaced apart in the center in the width direction. The back-and-forth stretchable sheet 70 has a front-rear dimension that is approximately the same as the front-rear dimension of the attachment portion of the fastening piece 130, but there may be a dimensional difference of about ± 20%. The back-side elastic sheet 70 may use a sheet-like elastic member such as a rubber sheet, but from the viewpoint of air permeability, as shown in FIG. 3, two nonwoven fabrics 71 are bonded with an adhesive such as a hot melt adhesive. A material in which an elastic stretch member 72 such as a perforated sheet, net, or elongated shape (thread shape or string shape) is fixed in a stretched state in the width direction is preferably used. . As the nonwoven fabric 71 in this case, the same thing as the exterior sheet 12 can be used. It is preferable that the elastic expansion / contraction member 72 has an extension ratio of about 150 to 250%. In addition, when an elongated (stretch or string-like) member is used as the elastic elastic member 72, it is preferable to provide about 5 to 15 members having a thickness of 420 to 1120 dtex at intervals 72d of 3 to 10 mm.
Further, as shown in the drawing, it is preferable that a part of the elastic expansion / contraction member 72 is arranged so as to cross the absorber 56, because the fit of the absorber 56 is improved. In this case, the elastic expansion / contraction member 72 is used. If the contraction force is prevented from acting on a part or all of the overlapping portion by means such as cutting, the back end portion of the absorbent body 56 does not contract in the width direction, so that the fit is further improved.
The elastic elastic member 72 may be fixed over the entire length of the nonwoven fabric 71 in the longitudinal direction of the sheet (width direction of the diaper), but in order to prevent shrinkage and turning over when attached to the diaper main body, the longitudinal direction of the sheet (Diaper width direction) In the range of about 5 to 20 mm at the end, it is preferable that the contraction force does not work or the elastic elastic member 72 does not exist.
In the illustrated embodiment, the back-side stretchable sheet 70 is sandwiched between the barrier sheet 62 and the exterior sheet 12 on both sides in the width direction of the liquid-impermeable sheet 11 and overlaps with the liquid-impermeable sheet 11. Although provided so as to be sandwiched between the permeable sheet 11 and the absorber 56, it may be provided between the top sheet 30 and the absorber 56 or between the liquid-impermeable sheet 11 and the exterior sheet 12. good. Further, when the exterior sheet 12 is formed by stacking a plurality of nonwoven fabrics, the entire back-side stretchable sheet 70 may be provided between the nonwoven fabrics of the exterior sheet 12.

<Example of basic structure of pants-type disposable diapers>
FIGS. 11-19 has shown an example of the underpants type disposable diaper.
This pants-type disposable diaper has an abdominal exterior sheet 12F that covers the abdominal side of the wearer's waist and a back exterior sheet 12B that covers the dorsal side, on both side edges in the width direction of the abdominal exterior sheet 12F. The joining portion 12A and the joining portions 12A on both side edges in the width direction of the back exterior sheet 12B are joined by heat sealing, ultrasonic welding, or the like to form the cylindrical waistline portion 100. When the backside exterior sheet 12B extends below the joining portion 12A as in the illustrated embodiment, the backside sheet is subjected to processing such as heat sealing integrally in the vertical range including up to this portion. The extension weld part 12E can be provided in the 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, considering the ease of breakage of the side portion, the joining portion 12A is generally composed of a collection of small welded portions, and is generally a joining pattern having a low ratio of the welding area in the joining portion 12A. 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 increasing the ratio of the welded area of the welded pattern to 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 of the belly side exterior sheet 12F in the width direction center portion of the waistline portion 100 by a hot melt adhesive or the like, and The rear end portions of 200 are connected by a hot melt adhesive or the like, and the abdominal exterior sheet 12F and the back exterior sheet 12B are not continuous on the crotch side and are separated from each other. This separation distance Y can be about 150 to 250 mm.
As can be seen from FIGS. 17 and 18, the upper opening of the waistline portion 100 becomes a waist opening WO through which the wearer's torso is passed. The portions surrounded by the side edges are leg openings LO through which the legs pass. In a state where each joint 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)
As shown in FIGS. 14 and 15, the abdominal exterior sheet 12 </ b> F and the back exterior sheet 12 </ b> B are formed by laminating two sheets 12, 12 such as non-woven fabrics, , 12 are provided with elongated elastic expansion / contraction members 15 to 19 such as rubber thread at a predetermined expansion rate. When using a nonwoven fabric, it is preferable that the basic weight shall be about 10-30 g / m < ² >. 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. Further, as the elongated elastic elastic members 15 to 18, 19T, and 19U, synthetic rubber or natural rubber may be used. Hot melt bonding, heat sealing, or ultrasonic bonding can be used to bond the two sheets 12 and 12 of the exterior sheets 12F and 12B and to fix the elongated elastic 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 joint portion 12A, and a back-side extension portion 14 that extends below the back-side main body portion 13. Have. 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. 16, 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.
A plurality of back-side waist elastic elastic members 17 are vertically spaced at the upper end (waist) W of the back-side main body 13 so as to be continuous over the entire width direction and at a predetermined extension rate. It is fixed in a stretched state along the width direction. 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, an extension ratio 150% to 400%, preferably fixed in particular about 220-320%. Further, it is not necessary for all of the back side waist elastic elastic members 17 to have the same thickness and extension rate. For example, the elastic waist members may have different thicknesses and extension rates at the upper and lower portions of the back waist part. Good. The back waist elastic elastic member 17 can be freely determined with respect to the first and second elongated elastic elastic members 15 and 16 regardless of the size or the expansion rate.

Further, in the lower portion U of the back-side main body portion 13, except for the width direction central portion that overlaps with the interior body 200, a plurality of portions are provided so as to be continuous over the entire width direction on each of the upper side and both sides in the width direction. The first elongated elastic elastic members 15 are fixed in a state where they are extended along the width direction at a predetermined extension rate with a space in the vertical direction.
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, at an extension rate of 200 to 350%, preferably fixed in particular about 240-300%.

Moreover, in the back side extension part 14, except the center part of the width direction which overlaps with the interior body 200, it extends over the whole width direction (at least over the whole collar cover part 14C) to each site | part of the width direction both sides. The plurality of second elongated elastic elastic members 16 are fixed in a state where they are spaced apart in the vertical direction and stretched along the width direction at a predetermined stretch rate.
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. It is preferable that about ² to 10 thread rubbers having an interval of 5 to 40 mm, particularly 5 to 20 mm, and an elongation ratio of 150 to 300%, particularly 180 to 260%, are fixed.

On the other hand, the abdominal exterior sheet 12F is composed of only the abdominal body part basically the same as the back body part 13 of the back exterior sheet 12B (the part occupying the same vertical range as the joint part 12A). It has a rectangular shape extending along the 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 ventral side exterior sheet (abdominal side main body portion) 12F, the upper end portion W has a plurality of ventral side waist portions so as to be continuous over the entire width direction. The elastic elastic members 18 are fixed in a state where they are extended along the width direction at a predetermined extension rate with a space in the vertical direction. The ventral waist elastic elastic member 18 is preferably as close as possible in number, thickness, stretch 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.

Further, in the lower portion U of the abdominal exterior sheet 12F (abdominal side main body portion), except for the widthwise central portion overlapping with the interior body 200, it is continuous over the entire width direction on each of the upper side and both sides in the width direction. As described above, the plurality of third elongated elastic elastic members 19 are fixed in a state of being spaced apart in the vertical direction and stretched along the width direction at a predetermined stretch 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 number, thickness, stretch rate, spacing, 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 exterior sheet 12F in the illustrated form is composed of only a portion that occupies the same vertical range as the joint portion 12A, but, similarly to the back side, a ventral main body portion that occupies the same vertical range as the joint portion 12A; In addition, a configuration including an abdominal-side extension portion extending below the abdominal-side main body portion may be employed. Thereby, the leg periphery shape of the abdominal exterior sheet | seat 12F 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 and the outer sheet are not easily peeled off, but in this form, in addition to the form in which the elastic elastic member exists only on both sides in the width direction, the inner body 200 is traversed from one side in the width direction to the other side. An elastic elastic member is present, but the elastic elastic member is cut at the central portion in the width direction overlapping the interior body 200 so that the elastic force does not act (substantially equivalent to not providing the elastic elastic member). A configured form 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. 13, the interior body 200 includes a surface sheet 30 on the body side, the liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. On the back side of the liquid-impermeable sheet 11, a crotch portion is provided 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 exterior 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 absorption part 20, barrier cuffs 60 and 61 standing 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 sheet 20 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 point between the width direction both side edges of the interior body 200 and the lower end edge of the ventral side exterior sheet 12F and in the vicinity of the intersection point between the lower end edge of the back side exterior sheet 12B. The rigidity (rigidity) of 15 to 50 cN / 50 mm, particularly 20 to 35 cN / 50 mm, is preferable because the overall standing shape of the barrier cuffs 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. In addition, the range which makes rigidity high is the range of 5-30 mm to the center side from the width direction both-sides edge of the interior body 200 in the width direction, and the interior body 200, the abdominal side exterior sheet | seat 12F, and the back side exterior sheet | seat 12B in the front-back direction. It is preferable that the distance is within 50 mm in the front-rear direction from the intersection (not including 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-Bending stiffness test method). For the measurement, a tensilon tester (curvature radius R1 = 5.0 ± 0.1 mm at the tip of the indenter, curvature radius R2 = 5.0 ± 0.2 mm at the tip of the support plate) was used, and the product 200 of the interior body 200 was measured 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 the 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 barrier cuffs 60 and 61 are provided, both side portions of the surface sheet 30 pass between the liquid-impermeable sheet 11 and the barrier cuffs 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 barrier cuffs 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 side in the width direction to the back side of the absorber 56 and is bonded and fixed with a hot melt adhesive or the like, the rigidity of both sides 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. Further, an excretion indicator 80 whose color changes due to absorption of the liquid component can be provided inside the liquid-impermeable sheet 11.

(Barrier cuffs)
The barrier cuffs 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 stool that travel along the top sheet 30 in the lateral direction and prevent side leakage. It is provided to prevent this.
In the present embodiment, as also shown in FIGS. 13 and 14, barrier cuffs 60 and 61 are provided double on 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 barrier cuff 61 stands obliquely from the side of the interior body 200 toward the center in the width direction, and the outer barrier cuff 60 is in the width direction of the inner barrier cuff 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 barrier cuff 61 folds the belt-like barrier 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. Between them, a plurality of elongated elastic elastic members 63 are fixed along the longitudinal direction at intervals in the width direction. The elongated elastic elastic member 63 is not fixed to the barrier sheet 62 at the front and rear ends, and is fixed so that the barrier cuff extends and contracts in the middle part. The barrier sheet 62 is made of a spunbond nonwoven fabric (SS, SSS, etc.), an 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%. Although not shown, a waterproof film can be interposed between the barrier sheets folded in two.

  It is preferable to arrange one or two elongated elastic expansion / contraction members 63 at the distal end portion of the inner barrier cuff 61, and it is even more preferable that one or two elongated elastic expansion / contraction members 63 be disposed at an 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 portion is preferably in the range of 30 to 70% of the height of the inner barrier cuff 61 (length in the width direction of the protruding portion). In an infant paper diaper, the height of the inner barrier cuff 61 is preferably about 15 to 35 mm. Therefore, the arrangement range of the elongated elastic stretchable 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 intermediate portion of the inner barrier cuff 61, the arrangement interval 61d is preferably 2 to 10 mm, and more preferably 2 to 6 mm.

The end of the inner barrier cuff 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. And a front-rear fixing portion 67 by heat sealing, and a middle portion in the front-rear direction is an unfixed free portion (inner free portion), and an elongated elastic member 63 along the front-rear direction is fixed to the free portion in an extended state. Yes.
The outer barrier cuff 60 also has basically the same structure as the inner barrier cuff 61, but its attachment portion (outer attachment portion) 68 is an attachment portion 65 of the inner barrier cuff 61 on the back side of the interior body 200. Further, both ends in the front-rear direction of the projecting portion (outer projecting portion) 69 pass from the mounting portion 68 to the side of the interior body 200, and are fixed to the outer surface of the inner barrier cuff 61 on the center side in the width direction. 61, a base side portion that extends to the surfaces of both end portions in the front-rear direction of the inner projecting portion 66 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 barrier cuff 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 1/2 of the height of the inner barrier cuff 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 in the width direction and fixed to the base portion side portion similarly to the outer barrier cuff 61 may be adopted.
The number of the elongated elastic elastic members 63 provided in the free part (outer free part) of the outer barrier cuff 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. The elongated elastic elastic member 63 disposed on the outer barrier cuff 60 has the same thickness and elongation rate as the inner barrier cuff 61, but the thickness is the same as or larger than that of the inner barrier cuff 61, and the elongation rate is the inner barrier cuff 61. The same or lower than that of 61 is preferred.
In addition, the longitudinal length of the front-rear fixing portion 67 of the protruding portions 66, 69 is preferably formed so that the inner barrier cuff 61 is the same as or shorter than the outer barrier cuff 60, and the elongated elastic cuffs 60, 61 are elongated elastic. The length of the stretchable member 63 fixed in the front-rear direction is preferably such that the inner barrier cuff 61 is the same as or longer than the outer barrier cuff 60. The boundary between the attachment portion 65 and the protruding portion 66 may be the same position on the outer barrier cuff 60 and the inner barrier cuff 61, but the boundary of the outer barrier cuff 60 is the center in the width direction than the boundary of the inner barrier cuff 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 part by hot melt adhesive or heat sealing at the edge part on the protruding parts 66, 69 side of the attaching parts 68, 65 of the outer barrier cuff 60 and the inner barrier cuff 61. 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 barrier cuff is folded and fixed to the surface 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 act. The outer barrier cuff 60 and the inner barrier cuff 61 both stand up outward in the width direction, and the pocket formed by the inner barrier cuff 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 barrier cuff rises toward the center in the width direction also in the crotch part, and the pocket formed by the inner barrier cuff 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 barrier cuffs 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 barrier cuff can be fixed to the interior body 200 via the one barrier cuff.

  In the outer and inner barrier cuffs 60 and 61 configured in this way, the contraction force of the elongated elastic elastic 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 protruding 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. 13. In particular, when the attachment portions 68 and 65 are located on the back side of the interior body 200, the outer and inner barrier cuffs 60 and 61 stand up so as to open outward in the width direction at the crotch portion and the vicinity thereof. The barrier cuffs 60, 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 inner and rear barrier cuffs 61 are restricted by the front and rear fixing part 67 so that the outer and inner barrier cuffs 60 and 61 do not open outward in the width direction. In addition, since the lower half of the outer barrier cuff 60 is also erected in the same manner, it is possible to surely prevent the abdomen and the back from leaking from both sides of the interior body 200. Further, the front and rear fixing portions 67 of the protruding portion 66 of the inner barrier cuff 61 are not folded back, and the front and rear fixing portions 67 of the protruding portion 68 of the outer barrier cuff 60 are folded outward. , 61 is maintained between the inner and outer free parts, and the outer and inner barrier cuffs 60, 61 are securely raised at a wide interval, and each fits around the leg, providing excellent leakage prevention. It will be.

Although the dimensions of the barrier cuffs 60 and 61 can be determined as appropriate, in the case of an infant paper diaper, for example, as shown in FIG. 17, the standing height of the inner barrier cuff 61 (the length in the width direction of the protruding portion 66 in the unfolded state). ) W5 is 10 to 50 mm, preferably 15 to 35 mm. Standing height of the outer barrier cuff 60 (width direction length 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 barrier cuff 61 is tilted to the surface of the top sheet 30 is preferably 60 to 170 mm, particularly 70 to 120 mm. Further, it is preferable that the separation distance W3 between the innermost folds when the outer barrier cuff 60 is flatly folded so as to be parallel to the surface of the top sheet 30 is 60 to 190 mm, particularly 70 to 140 mm.
Unlike the illustrated embodiment, only one of the outer and inner barrier cuffs 60 and 61 can be provided.

(Absorption element)
The absorbent element 50 includes an absorbent body 56 and a covering sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The covering 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, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as 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 have a rectangular shape, but as shown in FIG. 16, 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 barrier cuffs 60, 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 at the overlapping portion between the absorber 56 and the ventral exterior sheet 12F is L2, and the length of the front and rear ends of the absorber rear end portion 56B. The length in the 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, the width of the absorber front end portion 56F and the rear of the absorber When the width of the end portion 56B is W2, it is preferable that the 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)
If W1 and W2 are too narrow, the standing of the barrier cuffs 60 and 61 becomes unstable, and the amount of absorption becomes insufficient. If it is too wide, the fit feeling deteriorates due to a decrease in fit.
In addition, when the value is within the above numerical range, the absorber 56 does not exist in the vicinity of the attachment portion 65 of the barrier cuff 60, 61 in the crotch portion. Therefore, the degree of freedom of movement of the barrier cuff 60, 61 increases, and the barrier cuff 60, 61 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 absorber 56 on the side of the interior body 200 exists in a sufficient range on both the front and rear sides, the standing of the barrier cuffs 60 and 61 is stabilized 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 barrier cuffs 60 and 61 are opened outward in the width direction from a posture in which the barrier cuffs 60 and 61 are erected on the inner side in the width direction with reference to both side edges in the width direction. The posture change of 60, 61 is supported by the absorber 56 that exists up to the side of the interior body 200, and the overall standing shape of the barrier cuffs 60, 61 is stabilized. If the constricted part is too large outside the above numerical range, the degree of freedom of the barrier cuffs 60 and 61 becomes too high in the crotch part, and there is a possibility that a gap is easily formed around the leg, and both the front and rear sides of the crotch part However, since there is no base point (fulcrum), the standing of the barrier cuffs 60 and 61 may become unstable. Conversely, if the constricted portion becomes too small, the degree of freedom of the barrier cuffs 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 barrier cuffs 60 and 61 is lowered, and the fit of the absorbent body 56 around the legs is lowered to prevent the movement of the legs, which is too long. And the standing of the barrier cuffs 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 and deodorant zeolite) are contained in the superabsorbent polymer or antibacterial. Antibacterial and 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.

(Enveloping sheet)
When the covering 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 instead 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. 12, the covering sheet 58 may cover only the back surface and the side surface of the layer in addition to the form for 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 becomes a component of the covering 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 the 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 exterior sheet 12F and the back-side 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 goes from the side in the width direction to the side of the body and is bonded and fixed to the outer surface of the barrier 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 outer sheet 12M is sandwiched between the inner 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 them to the outside of the ventral and backside exterior sheets 12F and 12B. The crotch outer sheet 12M is affixed to the back surface of the inner 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.

<Characteristics of the present invention>
Characteristically, in each of the above-mentioned fixed diaper and pant-type configurations, a bar-like barrier body 20 that protrudes toward the body side is provided along the width direction at the upper end of the back side. In particular, in the above-described pant-type configuration, the barrier body 20 is provided not only on the back-side upper end portion but also on the ventral-side upper end portion. However, the same structure can be adopted even in the stationary type.
The barrier body 20 may be provided on the body side of the top sheet 30 as shown in FIG. 4 or the like as long as the barrier body 20 is raised on the body side, and may be provided on the back side of the top sheet 30. For example, as shown in FIG. It can be provided between the sheet 30 and the liquid-impermeable sheet 11 on the back side thereof, or can be provided between the liquid-impermeable sheet and the exterior sheet 12 (not shown). In the illustrated embodiment, the barrier body 20 is provided so as to straddle the side barrier cuffs 60 on both sides. However, the barrier body 20 is provided between the side barrier cuffs 60 and provided only on the top sheet. The both end portions may be sandwiched between the side barrier cuffs 60 and the top sheet 30, and the portion between them may be disposed on the top sheet 30.
As shown in FIG. 4, the barrier body 20 is formed by packing a compression-recoverable material 22 into a packaging body 21 in which a sheet is formed in an elongated cylindrical shape, at least in a portion where the absorbent body 56 overlaps the width direction range. It is what. Such a barrier body 20 itself has a three-dimensional shape, and since each part can be deformed independently and freely, it fits well against complex and three-dimensional irregularities on the body surface. Further, since a space 23 separated from the body is secured on the crotch side of the barrier body 20, the excrement damming allowance is greatly increased, and the excrement dammed by the barrier body 20 even when external pressure is applied. It is difficult to cause a situation in which the space 23 is escaped and stored, and the excrement is pushed out and leaked.

The thickness 20h of the barrier body 20 and the compression recovery property can be determined as appropriate. For example, damming of watery stool or soft stool is assumed in a diaper for an infant whose initial thickness T0 of the portion having the absorber 56 is 4 to 8 mm. In this case, the barrier body 20 has an initial thickness T0 of 5 to 20 mm, a compression stiffness LC in the thickness direction of 0.75 to 0.99, and a compression energy WC in the thickness direction of 6.000 to 9 500 gf · cm / cm ² , and the compression resilience RC in the thickness direction is preferably 40 to 70%. In addition, it is preferable that the initial thickness T0 of the barrier band 20 is larger than the initial thickness T0 of the portion having the absorber 56, because it fits well to the wearer. The compression stiffness LC is closer to 1, which means that the compression stiffness is higher. The compression energy WC is larger, the compression is easier. The compression resilience RC is closer to 100, the better the resilience to compression is. To do. The initial thickness T0, compression stiffness LC, compression energy WC, and compression resilience RC are measured using a KES-FB3-AUTO-A automated compression tester based on KES (Kawabata's Evaluation System for Fabrics). Measurements between steel plates with circular plane of compression area 2 cm ^2, the sample was compressed from 0 gf / cm ² to a maximum compressive load 50 gf / cm ^2, carried out between undo. The initial thickness T0 is the thickness of the sample at a pressure of 0.5 gf / cm ² . The compression stiffness LC represents the linearity of the compression displacement, and the numerical value increases as the load and displacement (thickness reduction due to compression) are proportional. The compression energy WC represents the work of compression, and the larger the value, the better the feeling of swelling and the feeling of lower back. The compression recovery rate RC represents the compression recovery property, and the larger the numerical value, the smaller the hysteresis.

Such thickness and compression recoverability can be adjusted by the material, amount, and structure of the compression recoverable material 22 packed in the package 21. The compressible material 22 is preferably in close contact with the inner peripheral surface of the package 21 without a gap, but there may be some gap.
Examples of the material of the compression restoring material 22 include a bulky crimped filament aggregate obtained by opening a crimped filament tow, a staple aggregate obtained by stacking staples such as pulp, and foamed urethane foam. Rubber, non-woven fabric, foamed hot melt adhesive and the like can be used.
The shape of the compression-recoverable material 22 can be determined as appropriate. In addition to using a rod-like material as shown in FIGS. 4 and 6, a sheet-like material can be folded or rolled as shown in FIG. A cylindrical thing can also be used as shown in FIG. Among these forms, as the material used for the rod-like form, fiber aggregates such as crimped filament aggregates and staple aggregates, and foamed resins such as foamed urethane foam and foamed hot-melt adhesive are suitable, sheet-like As a material used for the form, foamed urethane foam, rubber and nonwoven fabric are suitable, and as a material used for the tubular form, foamed urethane foam and rubber are suitable. However, in the present invention, a crimped filament aggregate or a staple aggregate is used.

The sheet used for the package 21 is preferably sufficiently flexible to such an extent that the deformation of the compression-recoverable material is not hindered. From this viewpoint, the initial thickness T0 is 0.05 to 1.0 mm, particularly 0.1 to 0.1 mm. 0.5 mm, bending stiffness B is 1 to 100 gf · cm ² / cm, especially 4 to 20 gf · cm ² / cm, and bending hysteresis 2HB is 1 to 20 gf · cm / cm, especially 2 to 10 gf · cm. Sheets that are cm / cm are preferred. The larger the bending stiffness B, the stronger the bending stiffness, and the larger the bending hysteresis 2HB, the worse the bending recovery property. The bending stiffness B and the bending hysteresis 2HB are measured using a KES-FB2-AUTO-A automated pure bending test machine based on KES (Kawabata's Evaluation System for Fabrics). Measurement is performed by holding a 20 cm × 20 cm sample on a chuck with an interval of 1 cm, and performing a pure bending with a constant velocity curvature of a deformation rate of 0.50 cm ⁻¹ / sec in the range of curvature K = −2.5 to +2.5 cm ^−1. Do. B represents the slope of the curve of the bending moment M and the curvature K per unit length of the sample. Here, a value obtained by averaging the slope between the curvature K = 0.5 and 1.5 and the slope between the curvature K = −0.5 and −1.5 are used. 2HB is an average value of hysteresis widths in the ranges of curvature K = 0.5 to 1.5 and curvature K = −0.5 to −1.5. Here, average values of curvatures K = 0.5, 1.5, −0.5, and −1.5 are used.

  The cylindrical packaging body 21 can be formed by rolling these sheets into a cylindrical shape, overlapping the end portions, and bonding them using a hot melt adhesive. As a material for the sheet, various water-repellent nonwoven fabrics (SMS, spunbond, meltblown, air-through, etc.) are preferable from the viewpoint of preventing excrement from seeping out, but a liquid-permeable sheet such as a hydrophilic nonwoven fabric is used. At the same time, it is also possible to use a liquid-absorbing material as the compression-restoring material 22 to give the barrier body 20 absorbability. In this case, an airlaid nonwoven fabric, a spunbonded nonwoven fabric, and a spunlace nonwoven fabric are preferable as the hydrophilic nonwoven fabric, and a crimped filament assembly and a staple assembly are preferable as the compression restoring material 22 and are necessary for this. Depending on the case, particulate or fibrous superabsorbent polymers can be mixed.

  When a water-repellent nonwoven fabric is used as the exterior nonwoven fabric 12, as shown in FIG. 15 and FIG. 21 which is an enlarged view of the exterior nonwoven fabric 12, the exterior nonwoven fabric 12 is folded back to the body side at the front and rear ends of the diaper. In addition, it is also a preferable form to join the non-attachment part of the barrier body 20 (the part excluding the attachment part 20F with respect to the back side member) with a hot melt adhesive HM or the like. In this case, at least the surface of the upper side of the diaper of the barrier body 20 is covered with the water-repellent nonwoven fabric, and excretion of excrement through the barrier body 20 is prevented. Of course, it is possible to cover the entire non-attached portion of the barrier body 20, and in this case, the folded portion of the exterior nonwoven fabric 12 is joined to the barrier body 20, and other members on the crotch side than the barrier body 20, For example, it can be joined to the top sheet 30 or the like. This structure can also be adopted in a fixed form. Moreover, in a pants-type form, as shown in FIG. 22, the barrier body 20 can also be attached to the inner surface of the portion where the exterior nonwoven fabric 12 is folded back to the body side at the front and rear ends of the diaper.

The thickness of the barrier body 20 can be changed according to the part, and in the present invention, the thickness of the barrier body 20 is reduced as it goes to both ends in the diaper width direction . This increases the fit against the waist curve, becomes difficult to occur a gap between particularly the opposite ends and the body of the barrier member 20. Such a shape is formed by changing the shape of the packaging body 21 and the filling amount of the compression-restorable material 22 in the longitudinal direction of the barrier body 20.
The cross-sectional shape of the barrier body 20 is appropriately determined in addition to the round bar shape shown in FIG. 4 and the like, a square bar shape such as a trapezoidal shape whose upper base is longer than the lower base, as shown in FIG. 6, and a kamaboko shape as shown in FIG. be able to. In particular, in the case of a rectangular bar shape as shown in FIG. 6, it is preferable that the elongated elastic member 25 such as a rubber thread is fixed in an extended state along the angular position, since the shape retention property and the restoration property are improved.

  In particular, when the elastic member 25 is fixed from the center in the thickness direction of the portion 22c of the barrier body 20 containing the compression-restorable material to the back side in a state of extending along the diaper width direction, as shown in FIG. The portion 22c of the barrier body 20 containing the compression-restorable material is warped so as to bulge toward the body side toward the center side in the diaper width direction, and the fit to the waist shape of the waist is enhanced. On the other hand, when the elastic member 25 is fixed to the surface side from the center in the thickness direction of the barrier body 20 in a state of extending along the diaper width direction, the barrier body 20 is prevented from warping or the cross-sectional shape of the barrier body 20 is Can be forced. Although the elastic member 25 shown in FIG. 5 is provided in the barrier body 20, the same effect is exhibited even if it is not provided in the barrier body 25. For example, even if the back-side elastic sheet 70 described above is provided only on the back side of the barrier body 20, the barrier body 20 warps so that the center side in the diaper width direction bulges toward the body side due to the contraction action, and against the waist. Fit is improved.

On the other hand, the diaper width direction range 22W of the compression-restorable material-containing portion 22c in the package 21 can be determined as appropriate and can be the whole, but the absorbent body 56 is more like the above-described fixed type. When the fixed portion of the side barrier cuff 60 is located on the outer side in the width direction, when the above-described side barrier cuff 60 is provided, the range in the width direction from one side edge of the absorber 56 to the other side edge If the width direction is 60 W or less from the fixing part of one side barrier cuff 60 to the fixing part of the other side barrier cuff 60, a gap is generated between both ends of the barrier body 20 and the body. It is preferable because it is difficult. In the case of the pants-shaped form, the diaper width direction range 22W of the compression-restorable material-containing portion 22c is equal to or greater than the width direction range W1 from one side edge to the other side edge of the interior body 200 and the waistline portion. The width direction range between the joint portions 12A is preferably less than 12W.
In this case, as employed in the pants-type configuration, only the packaging body 21 is continuously extended from one end to the other end in the width direction of the diaper, and the barrier body 20 is manufactured on the production line as described above. It is also preferable to configure it so that it can be attached continuously along the flow direction. This structure can also be used in fixed-type, but fixed-type disposable diapers are widely used in production forms in which the flow direction of the production line and the width direction of the diaper are orthogonal to each other. In the mold, since a production form in which the flow direction of the production line is parallel to the width direction of the diaper is widely adopted, it can be said that the form is particularly suitable for a pants-type disposable diaper.

The attachment position of the barrier body 20 with respect to the absorber 56 can be determined as appropriate, but when the barrier body 20 is provided in the end flap part BE and the crotch side end of the barrier body 20 and the upper end of the absorber 56 are separated from each other, This is preferable because more space 23 separated from the body is secured on the crotch side of the barrier body 20. In addition, if the separation distance 23L is excessively narrow, the effect is insufficient, and even if it is excessively widened, it is crushed by the external pressure. Specifically, in the case of diapers for infants up to about 12 months, who frequently excrete watery stool and soft stool, the separation distance 23L is preferably 5 to 15 mm.
Further, as shown in FIG. 10, the barrier body 20 is provided so as to straddle the crotch side end portion of the end flap portion BE and the upper end portion (barrier body 20 side end portion) of the absorber 56, and the barrier body 20 is dammed up. It is also preferable that the excrement is absorbed by the absorber 56. In this case, as shown in the figure, if at least the upper end of the absorbent body 56 has a raised shape that increases in thickness as it approaches the barrier body 20, the excrement blocked by the barrier body 20 This is preferable because it easily returns to the crotch side.
The separation distance 24L between the portion 22c containing the compression-recoverable material 22 in the barrier body 20 and the front and rear ends of the diaper can be determined as appropriate, but is preferably equal to or less than the initial thickness T0 of the barrier body 20, and more preferably 0 to 15 mm. Is preferred. When the separation distance 24L becomes too large, the front and rear ends of the diaper float from the skin surface, and the wearing feeling and the appearance are deteriorated.
Although the attachment structure of the barrier body 20 can be determined as appropriate, in the illustrated embodiment, the barrier body 20 is bonded to the back side member (the top sheet 30, the barrier sheet 62, etc.) using the hot melt adhesive HM. In both end portions 22e that do not enclose the compressible restoring material 22, in order to flatten and fix the packaging body 21, as shown in FIG. 23, it is fixed by using joint HS by heat sealing or ultrasonic sealing. preferable.

The bonding width 20W of the barrier body 20 (vertical width when the crotch portion is down in the mounted state) 20W can be determined as appropriate. However, in the portion 22c containing the compression-restorable material 22, FIGS. It is preferable to set it to 1 / 16-1 / 2 of the outer periphery in the cylindrical state of the packaging body 21, especially about 1 / 8-3 / 8 so that the joint part by the adhesive agent HM may be shown in FIG. In this case, the degree of freedom of deformation of the barrier body 20 can be increased without impairing the fit to the body, and as shown in FIG. (When the crotch portion is at the bottom) is pushed out to the crotch side, and excrement can be received below the protruding portion, so that the damming effect is further enhanced.
The positions of the joining portions are only the lower side of the barrier body 20 (when the crotch portion is in the mounted state), only the central portion (FIG. 23 (a)), and only the upper side (FIG. 23 (b)). ), But the latter two are preferred.
Further, as shown in FIG. 23 (c), when the joint width 20W increases toward at least the crotch side toward both sides of the diaper width direction, the excrement dammed up by the barrier body is difficult to spread outward in the diaper width direction. Therefore, it is preferable.

Further developed this, in the compressed resilient material containing moiety 22c, of the intermediate portion c2 between the diaper width direction end portions c1, c1 and these cylinders state of the package 21 the bonding width 20W ₁ at both ends c1 about 1/2 of the outer periphery from 5mm width smaller than half the outer circumference at the (1/2 of 1 / 2-5mm~ outer periphery of the outer periphery), the bonding width 20W ₂ in the intermediate portion c2, of the package 21 It is also preferable to set the outer circumference in the cylindrical state to 1/16 to 1/2, particularly about 1/8 to 3/8, and 20W ₂ <20W ₁ . In this case, the upper portion of the barrier body 20 protrudes toward the crotch side at the intermediate portion c2, and the both sides c1 are joined together including the portions corresponding to the protruding portions, so that they are received below the protruding portion. The excrement is surrounded and the movement to the outer side of the diaper width direction is blocked.
In particular, a form shown in FIG. 23 (d) are those bonding width 20W ₂ of the intermediate portion c2 is constant in the diaper width direction. Furthermore, embodiments shown in FIG. 23 (e) and (d) is in the form of bonding width 20W ₂ of the intermediate portion c2 is enlarged to at least the crotch side toward the both sides diaper width direction, in FIG. 23 (e) changes in joint width 20W ₂ in the configuration shown has an arc shape, the change in bonding width 20W ₂ in the configuration shown in FIG. 23 (e) are those without straight.

  The present invention is suitable for a stationary disposable diaper and a pants-type disposable diaper as in the above example, but is also applicable to other forms of disposable diapers. For example, in a pants-type disposable diaper, not only the structure in which the abdominal exterior sheet and the back exterior sheet are separated as in the above example, but a structure having an integral exterior sheet from the abdominal side to the back side through the crotch Naturally, it is also applicable to disposable diapers having other shapes such as a pad type.

It is an expanded state top view of a fixed type disposable diaper. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is principal part sectional drawing which shows the other example of a barrier body. It is principal part sectional drawing which shows the other example of a barrier body. It is principal part sectional drawing which shows the other example of a barrier body. It is principal part sectional drawing which shows the other example of a barrier body. It is principal part sectional drawing which shows the other example of a barrier body. 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 a product state. It is a rear view of a product state. It is a top view in the state where a diaper was developed showing only a principal part of other underpants type disposable diapers with a size. It is a principal part enlarged view of FIG. It is principal part sectional drawing which shows the other example of a barrier body. It is a principal part top view which shows roughly the various joining forms of a barrier body.

  DESCRIPTION OF SYMBOLS 10 ... Absorbent main-body part, 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 20 ... Barrier body, 21 ... Packaging body, 22 ... Compression-recoverable material, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorption Element: 52 ... Fiber, 54 ... Superabsorbent polymer particle, 56 ... Absorber, 58 ... Cover sheet, 60 ... Side barrier cuff, 62 ... Barrier sheet, 70 ... Back elastic sheet.

Claims (14)

A liquid-permeable top sheet that extends from the lower abdomen along the center in the width direction through the crotch to cover the buttocks and that forms the body-side surface, and a liquid impervious located on the outer surface side An absorbent main body that is a portion where an absorber is interposed between the sheet and the sheet,
A disposable diaper, wherein a bar-like barrier body protruding on the body side extends along the width direction so that at least one of the back-side upper end part and the abdominal side upper end part overlaps at least the absorbent body in the width direction. ,
The barrier body is formed by packing a compression-recoverable material in a package formed by forming a sheet into an elongated cylinder, and the compression-recoverable material is packed at least in a portion where the width direction range overlaps the absorber. der thing is is,
The barrier body has an initial thickness T0 of 5 to 20 mm, a compression stiffness LC in the thickness direction of 0.75 to 0.99, and a compression energy WC in the thickness direction of 6.000 to 9.500 gf · cm / cm ² and the compression resilience RC in the thickness direction is 40 to 70%,
The compressible material is an assembly of crimped filaments or an assembly of staples;
The barrier body has a shape in which the thickness becomes thinner toward both ends of the diaper width direction, and the initial thickness T0 is thicker than the initial thickness T0 of the portion having the absorber.
A disposable diaper characterized by that.   The packaging body continuously extends from one end to the other end in the width direction of the diaper, and includes a main portion including at least a portion where the absorbent body and the width direction range overlap, and both end portions located on both sides in the width direction. The disposable diaper according to claim 1, wherein the compression-recoverable material is packed therein and the compression-recoverable material is not packed in both ends. The sheet forming the package has an initial thickness T0 of 0.05 to 1 mm, a bending stiffness B of 1 to 100 gf · cm ² / cm, and a bending hysteresis 2HB of 1 to 20 gf · cm / cm. The disposable diaper according to claim 1 or 2 . The disposable diaper of any one of Claims 1-3 whose sheet | seat which makes the said package is a water-repellent nonwoven fabric. The disposable diaper according to any one of claims 1 to 4 , wherein the sheet forming the package is a hydrophilic nonwoven fabric, and the compression-recoverable material is a liquid-absorbing material. It is a part extending to the rear side of the absorbent main body part, and a part extending to the front side of the absorbent main body part, and a back end flap part which is a part not having the absorber, And having a ventral end flap portion which is a portion not having the absorber,
The disposable body according to any one of claims 1 to 5 , wherein the barrier body is provided in the end flap portion, and a crotch side end of the barrier body and an upper end of the absorber are separated from each other. Diapers. Side barrier cuffs that stand on the use surface side are provided on both sides of the diaper along the front-rear direction.
Each side barrier cuff is a fixed portion in which the outer portion in the width direction is fixed to the side portion of the diaper, and both of the inner portions in the width direction are fixed portions that are fixed to the diaper in the front-rear direction. The front-rear direction range between the fixed parts is a free part,
The fixing part of the side barrier cuffs is located on the outer side in the width direction than the absorber,
The width direction range of the portion including the compression-recoverable material in the barrier body is not less than the width direction range from one side edge of the absorber to the other side edge, and from the fixing part of one side barrier cuff. The width direction range to the fixed part of the other side barrier cuffs is below,
The disposable diaper of any one of Claims 1-6 . The portion of the barrier body that encloses the compression-recoverable material is continuously continuous along the diaper width direction with a joining width corresponding to 1/16 to 1/2 of the outer periphery of the packaging body in the cylindrical state. The disposable diaper according to any one of claims 1 to 7 , wherein the disposable diaper is joined to a member located on a back side of the barrier body, and a portion other than the joined portion is not joined to an adjacent member. The disposable diaper according to claim 8 , wherein the joint width is expanded at least to the crotch side as it goes to both sides of the diaper width direction. Of the both ends of the diaper in the diaper width direction and the intermediate portion between the compression-recoverable material of the barrier body,
At both ends of the diaper width direction, the back surface is joined to a member located on the back side of the barrier body with a joining width corresponding to 1 / 2-5 mm of the outer periphery in the cylindrical state of the package body to 1/2 of the outer periphery. In addition, the part other than this joint is not joined to the adjacent member,
In the middle part of the diaper width direction, the back surface is continuously located on the back side of the barrier body along the diaper width direction with a joining width corresponding to 1/16 to 1/2 of the outer periphery of the package body in the cylindrical state. While being joined to the member, parts other than this joined part are not joined to the adjacent member,
The bonding width at both ends of the diaper width direction is larger than the bonding width at the middle part of the diaper width direction,
The disposable diaper according to any one of claims 1-9. On the back side of the thickness direction center of the part containing the compressed resilient material of said barrier member, the elastic member is fixed in a stretched state along the diaper width direction, in any one of claims 1-10 The disposable diaper described. The elastic member is fixed in a state where the elastic member extends along the diaper width direction from the center in the thickness direction in the portion of the barrier body containing the compression-restorable material, to any one of claims 1 to 11. The disposable diaper described. A water-repellent nonwoven fabric is provided on the back side of the barrier body, the water-repellent nonwoven fabric is folded back on the body side at the front and rear ends of the diaper, and at least the surface of the barrier body on the upper side of the diaper is covered by the folded portion the disposable diaper according to any one of clauses 1-12. At the time of wearing, it is a stationary disposable diaper that locks fastening pieces provided on both sides of the back side to the ventral side outer surface,
Between the fastening pieces, there is provided a belt-like back side elastic sheet that elastically expands and contracts in the width direction, and this back side elastic sheet is elastic in the width direction by an elastic expansion member fixed in an extended state along the width direction. It is configured to expand and contract,
The disposable diaper according to any one of claims 1 to 13, wherein a portion of the barrier body that encloses the compression-restorable material is fixed to the upper back side of the back side of the elastic member of the back side elastic sheet. .

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