JP4912198B2 - Pants-type disposable diapers - Google Patents

Description

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

A pants-type disposable diaper that has a front body and a back body that are continuous through the crotch part, and that both side edges of the front body and the back body are joined together to form a leg opening and a waist opening. Well known.
In this type of diaper, various techniques are disclosed for conforming to the wearer's three-dimensional body shape in order to prevent leakage and improve the wearing feeling.
For example, a substantially wedge-shaped elastic elastic member is arranged at the center of the back body of the exterior body in order to improve the fit to a ridge with a groove such as a ridge groove or a crack. A technique for forming a protrusion that enters a crack is known (for example, Patent Documents 1 and 2 below).
JP2003-038571 JP 2006-043124 A

However, these conventional techniques for improving the fit to the buttock, when stationary, have a convex portion that fits into the crack and fits it to provide a leakage prevention function. Thus, when the left and right buttocks alternately move back and forth on the body, it was not possible to follow the cracks, changes in the shape of the groin, etc., and leakage could not be effectively prevented.
Then, the main subject of this invention is providing the underpants type disposable diaper which is excellent in the fitting property with respect to a buttocks, especially the operation | movement which moves bodies, especially a leg, and a waist, such as walking.

The present invention and effects obtained by solving the above problems are as follows.
<Invention of Claim 1>
An exterior body in which a front body and a back body are joined at both side edges to form a waist opening and a pair of left and right leg openings;
An absorbent body positioned from the front body to the back body on the inner surface side of the exterior body, and a pants-type disposable diaper comprising:
The exterior body includes a plurality of curved elastic elastic members that bypass the crotch side from the one side edge joint portion of the front body and the back body and reach the other side edge joint portion on the back body, and The elastic member is;
In widthwise central portion, a substantially V-shape protruding to the site that overlaps with the rear end of the absorbent body have suited the crotch side from between the rear end of the absorber and the waist opening of the back body A first elastic stretch member disposed in a raised portion forming pattern that forms a raised portion extending in the front-rear direction on the skin contact surface side in the width direction center of the back body;
It passes through the apex of the substantially V-shaped raised portion forming pattern at the center in the width direction or the vicinity of the crotch side, and is on the waist opening side of the both side edges of the diaper from the apex of the substantially V-shaped raised portion forming pattern. The ridges follow the change in shape of the skin surface that is curved more gently than the ridge formation pattern from the central part in the width direction toward both side edges of the diaper so that both ends are located at a position close to Comprising a second elastic stretch member arranged in a follow-up assisting pattern that assists performance and deformability,
A pants-type disposable diaper characterized in that the first elastic stretchable member and the second elastic stretchable member do not cross each other.

(Function and effect)
The disposable pants-type diaper of the present invention has a substantially V-shaped raised portion formation pattern formed by an elastic elastic member at the center in the width direction of the back body.
With this raised portion formation pattern, a substantially V-shaped raised portion that easily enters the crack is formed on the skin contact surface at the center in the width direction of the back body.
Further, the elastic stretchable member constituting the raised portion forming pattern is a curved elastic stretchable member that bypasses the crotch side from the one side edge joint portion and reaches the other side edge joint portion.
That is, a part of the curved elastic elastic member forms a raised portion forming pattern.
For this reason, due to the elastic stretchability of the portion from the side edge joint portion to the raised portion formation pattern, the raised portion has followability and deformability with respect to the skin surface shape change.
Furthermore, the present invention passes through the apex of the substantially V-shaped protuberance formation pattern or the crotch side thereof, which constitutes the protuberance formation pattern or is formed by another curved elastic elastic member, and is waisted from the apex. It has a follow-up assisting pattern having a base that is close to or at the same distance from the opening side.
Since this followable auxiliary pattern passes through the apex of the substantially V-shaped raised portion forming pattern or the vicinity thereof, the elasticity of the portion from the side edge joint portion to the raised portion forming pattern in the curved elastic stretchable member The substantially V-shaped portion is opened unnecessarily, and the height of the raised portion is prevented from being lowered, and the shape of the raised portion is stabilized.
In addition, since this follow-up assist pattern is a pattern toward the both side edges of the diaper while gently curving from the apex or nearby position of the protuberance formation pattern, particularly when the protuberance is mounted, The followability and the deformability with respect to the shape change of the skin surface on the apex side of the substantially V shape are more effectively enhanced.
Furthermore, since the followable auxiliary pattern is also directed to the waist opening edge as it goes from the center in the width direction to the side edge, there is also an effect of improving the rounded shape of the buttocks and the fit to the ridges.
Thus, in the disposable diaper of the present invention, a raised portion having a shape that easily enters a crack is formed, and the followability to the skin is enhanced while effectively maintaining the shape.
Therefore, even when the body, especially legs, and the waist are moved, such as walking, the raised portion is not separated from the rupture. Further, the pants-type disposable diaper has a fitting property with respect to other parts of the buttocks, and is extremely excellent in leakage prevention and wearing feeling.
Further, the elastic elastic member can be easily arranged.

<Invention of Claim 2>
The raised portion forming pattern includes a width direction both side portion extending from both side edges of the diaper along the width direction to the width direction center side of the absorbent body, and a width direction center side of the width direction side portions. The underpants type disposable diaper of Claim 1 which is a pattern which has the said substantially V-shaped part which goes to the crotch side from the edge part of this.

<Invention of Claim 3>
The pants-type disposable diaper according to claim 1 or 2, wherein the followable auxiliary pattern is a pattern passing through both side edges of the absorber.

<Invention of Claim 4>
The pants type according to any one of claims 1 to 3, wherein at least one of a portion along the raised portion formation pattern and a portion along the follow-up assisting pattern is formed at a lower rigidity than the other portion of the absorbent body. Disposable diapers.

(Function and effect)
The bulge is easily formed and / or the followability of the bulge is further increased.

  As described above, according to the present invention, there is provided a pant-type disposable diaper that is excellent in fit with respect to the buttocks, particularly when the body, such as walking, moves the legs and waist.

Next, embodiments of the present invention will be described in detail below with reference to the drawings.
[First Embodiment]
A pants-type disposable diaper X1 according to the first embodiment will be described with reference to a development view of FIG. 1 and a back view of FIG.
The pants-type disposable diaper X1 is mainly composed of an exterior body 1 and an absorbent body 3 fixed to the inner surface of the exterior body 1.

The exterior body 1 is formed with leg peripheral edges EL and EL that are recessed at the center in the front and rear direction on both sides and curved in the center in the width direction. A liquid-impervious and breathable exterior sheet 11 having a substantially hourglass-shaped planar outer shape formed with a ventral waist part Fs and a back waist part Bs wider than between the peripheral edges EL and EL. Side portions of the abdomen waistline portion Fs and the back waistline portion Bs of the seat 11 are joined to form a pants shape having a waist opening WO and a leg periphery opening LO.
Here, the crotch C in the pants-type disposable diaper X1 of the present invention is the middle position of the line connecting the leg-opening side ends of the left joint part in the unfolded state and the leg-opening side ends of the right joint part The middle position of the line connecting the two lines is a position on the line connecting the two lines, and the front side F is defined as the front body F and the back side B is defined as the back side from the crotch. In particular, in the case of this embodiment, the leg opening side end of the side joint corresponds to both ends of the leg periphery edge EL.
Moreover, the exterior sheet 11 of this embodiment has a laminated structure in which an appropriate elastic stretchable member, which will be described later, is disposed between two layers of nonwoven fabric sheets 11s and 11s. However, the sheet material can be appropriately selected from non-woven sheets and sheet materials used as a known diaper outer package, and the number of sheets stacked can be set to a suitable number of layers.

On the other hand, the exterior body 1 has a plurality of characteristic bodies that are connected to the back body B from the one side edge joint Ec of the front body F and the back body B, bypassing the crotch side and reaching the other side edge joint Ec. Are arranged with elastic elastic members 20, 20.
These curved elastic elastic members 20, 20... Are composed of a first elastic elastic member 20A and a second elastic elastic member 20B having different curved shapes.
20 A of 1st elastic expansion-contraction members go to the center of a width direction from a both-sides edge part, and change the extending direction to the crotch C side just before reaching the center of a width direction, and form the substantially V-shaped protruding part formation pattern P1. ing.
With this raised portion formation pattern, raised portions that are convex on the skin contact surface are formed.

Moreover, since it becomes continuous from a side edge junction part to the protruding part formation pattern P1, the protruding part formed in the center part of the width direction has the followability and deformability which respond to the shape change of the skin surface.
Here, the position of the vertex Vt of the raised portion formation pattern P1 (when the raised portion formation pattern P1 is composed of a plurality of curved elastic stretchable members, the position of the vertex of the substantially V-shaped pattern closest to the crotch) Is preferably within a range of 80 mm to the left and right with the width center line H of the diaper as a boundary, and a distance L1 from the crotch C within a range of 0 to 150 mm, and more preferably within a range of 0 to 50 mm.
If it is 80 mm or more away from the center H in the width direction of the diaper, the ridge formed will not easily enter the crack, and the leakage prevention effect cannot be effectively obtained.
Further, if the crotch C is separated from the crotch C by 150 mm or more, the raised portion is not formed on the crotch side of the crack, and leakage of the portion cannot be prevented.
In the present invention, the substantially V shape of the raised portion formation pattern P1 means a divergent shape that spreads from the vertex Vt toward the waist opening edge We, such as a parabolic shape as well as a V shape, and at least from the vertex Vt. A shape having a divergent shape that widens toward the waist opening edge We side and having a portion having a hem width L2 of 10 to 230 mm and a longitudinal length (height) L3 of 10 to 190 mm is in a substantially V-shaped range. enter. Further, the substantially V-shape does not necessarily need to be bilaterally symmetric as in the illustrated example, and may be bilaterally asymmetric.

On the other hand, the second elastic elastic member group 20B passes through the crotch side vicinity of the apex Vt of the substantially V-shaped raised portion formation pattern P1, and has a position closer to the waist opening edge We side than the apex Vt. Furthermore, the vicinity of the vertex Vt is used as an inflection point, and a gentler or obtuse pattern is formed toward the end than the raised portion formation pattern P1.
In this way, the second elastic elastic member 20B passes through the vicinity of the apex Vt of the raised portion formation pattern P1 and extends toward the both side edge joint portions Ec and Ec of the diaper while being gently bent from the vicinity position. Thus, while preventing the height of the raised portion from being lowered at the time of wearing, the raised portion is urged toward the skin contact surface side, and the followability and deformability of the raised portion according to the change in the shape of the skin are achieved. Assists and enhances the ability to follow the skin surface.

The distance L4 between the apex Vt of the raised portion formation pattern P1 by the first elastic elastic member 20A and the second elastic elastic member 20B is 0 to 150 mm, preferably 0 to 30 mm. When it exceeds 150 mm, it becomes difficult to obtain the effect of assisting the followability of the raised portion.
In the present embodiment, the first elastic elastic member 20A and the second elastic elastic member 20B do not intersect. Accordingly, at the side edge joint Ec, the base end of the second elastic elastic member 20B is located on the crotch C side with respect to the base end of the first elastic elastic member 20A. The separation distance L5 between the first elastic elastic member 20A and the second elastic elastic member 20B at the side edge joint portion is preferably about 0 to 40 mm. If the distance exceeds 40 mm, the pulling directions are too different, and it becomes difficult to obtain the follow-up assist effect of the raised portion.

On the other hand, the number of the first elastic elastic member 20A and the second elastic elastic member 20B may be one, but it is preferable to arrange a plurality of them. In the example shown in the figure, two are provided for each. Note that. When a plurality of lines are arranged side by side, they do not need to be spaced apart at equal widths at all locations unless they intersect each other.
In the case of a plurality, it is preferable that the number of the first elastic elastic members 20A is about 2 to 20, and the number of the second elastic elastic members 20B is about 2 to 15. In the case where a plurality of elastic elastic members are arranged, the distance between the elastic elastic members arranged in a line is preferably about 1 to 5 mm.

If it is the arrangement | positioning form of this form, a 1st elastic expansion-contraction member is a thing of 470-620 dtex with a thickness of 470 dtex or more especially suitably. It is preferable to fix the sheet material in a stretched state of 150 to 300%, particularly preferably 220 to 250%. In particular, in a substantially V-shaped raised portion formation pattern, it is preferable to fix the sheet material in a stretched state of 220 to 300%.
The second elastic elastic member 20B has a thickness of 470 dtex or more, particularly preferably 470 to 620 dtex. It is good to fix to an upright sheet in the stretched state of 150 to 300%, particularly preferably 220 to 250%.

On the other hand, in the illustrated example, in addition to the curved elastic stretch members 20 (20A) and 20 (20B) constituting the raised portion forming pattern P1 and the followable auxiliary pattern P2 (20B), the pattern is disposed along the waist opening edge We. The waist elastic elastic members 21, 21... And the leg elastic elastic members 22, 22... Arranged along the leg periphery EL are arranged to improve the fit at various places.
In addition, the arrangement | positioning form of elastic expansion-contraction members other than the curved elastic expansion-contraction member 20 is not only the arrangement | positioning of an example of illustration, but the range of the technique currently employ | adopted for the conventionally known pants type disposable diaper in the range which does not deviate from the scope of the present invention. It can be appropriately selected and employed.
In addition, the elastic elastic members are arranged in a known manner in which they are bonded by an adhesive such as a hot melt adhesive while being stretched and sandwiched between one side of the nonwoven fabric sheet 11s or between the laminated sheets 11s and 11s. Adhesion method can be taken.
Here, the elastic elastic members 20 to 22 are typically made of rubber thread. As the thread rubber, those made of synthetic rubber or natural rubber and those mainly composed of natural rubber are suitable. In addition to the rubber thread, a material having rubber elasticity, which is formed (molded) into a thread shape, a string shape, a belt shape, a net shape, a foam shape, or the like, including a generally well-known elastomer resin can be used. For example, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester can be used.

On the other hand, the absorber 3 is disposed so as to extend from the front body through the crotch portion to the back body according to a known pants-type diaper, and is bonded to the exterior body 1. The adhering method of the absorber 3 is based on a known appropriate method such as a hot melt adhesive.
The structure of the absorber 3 can be a known layer structure in which an absorbent core 33 is disposed between a liquid-permeable top sheet 31 and a liquid-impermeable back sheet 32. In the example of illustration, although not arranged, you may provide the standing cuff which stands on the skin contact surface side.
In the present embodiment, the absorbent core 33 is formed in a circular arc shape in the front-rear direction on both sides along the leg-circumference edge EL of the exterior sheet 11, and the fit around the legs is enhanced.
As the liquid-permeable top sheet 31 that covers the surface side (skin contact surface side) of the absorbent core 33, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid-permeable surface sheet 31, urine and the like are quickly absorbed, and the dry touch property is excellent.
As the liquid-impervious back sheet 32 covering the back side (non-skin contact surface side) of the absorbent core 33, a liquid-impervious plastic sheet such as polyethylene or polypropylene is used. Those having wettability are preferably used. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. If the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, which is superior in terms of flexibility.

The absorbent core 33 is made of an absorbent polymer dispersed in fibers such as piled pulp and nonwoven fabric and encased by a liquid-permeable sheet such as crepe paper, nonwoven fabric sheet or perforated sheet.
Examples of the superabsorbent polymer include carboxymethyl cellulose, polyacrylic acid and salts thereof, acrylate polymer cross-linked product, starch-acrylic acid graft copolymer, starch-acrylonitrile graft copolymer hydrolyzate, polyoxyethylene cross-linked product Products, crosslinked products of carboxymethyl cellulose, polyethylene oxide, polyacrylamide and other partially crosslinked polymers, or a copolymer of isobutylene and maleic acid are preferably used. What added the blocking inhibitor in order to suppress the blocking property by moisture absorption of a product can also be used. In addition, the superabsorbent polymer has various forms such as powder, particles, granules, pellets, sol, suspension, gel, film, and nonwoven fabric. Any of them can be used in the present invention, and a particulate material is particularly preferably used.

[First comparative form]
Next, the first comparative embodiment will be described. The pants-type disposable diaper X2 according to the first comparative form is a pattern in which a substantially V-shaped raised portion formation pattern P1 formed by the first elastic elastic member 20A is convex toward the waist opening edge We. It is.
As shown in FIG. 3, the first elastic elastic member 20 </ b> A according to the present embodiment substantially changes its direction of extension toward the waist opening edge We just before reaching the crotch side from both side edges and reaching the center in the width direction. A V-shaped raised portion formation pattern P1 is formed.
In this embodiment, the convex direction of the raised portion forming pattern P1 is different from that of the first embodiment, but the operational effects of the raised portion forming pattern P1 and the first elastic elastic member 20A are the first embodiment. No difference.
Note that the position of the apex Vt of the raised portion forming pattern P1 (when the raised portion forming pattern P1 is composed of a plurality of curved elastic elastic members, the position is the apex of the substantially V-shaped pattern closest to the waist opening edge. ) From the crotch C to the waist opening edge We side, a position separated by 0 to 150 mm, preferably a position separated by 50 to 80 mm. When the separation distance L1 is less than 30 mm, it is difficult to fit the crack sufficiently at the time of wearing, and when it exceeds 80 mm, unnecessary wrinkles are formed on the waist opening edge We, which may cause back leakage.
The meaning of the substantially V shape of the raised portion formation pattern P1 is the same as that in the first embodiment. The divergent shape having a predetermined length (height) in the front-rear direction and a predetermined hem width shown in the first embodiment corresponds to a substantially V-shape of the present invention. Moreover, it does not need to be symmetrical.
On the other hand, the second elastic elastic member 20B is disposed closer to the waist opening edge We than the first elastic elastic member 20A, and the apex of the substantially V-shaped raised portion formation pattern P1 is near the waist opening edge We side. And a position closer to the waist opening edge We side than the apex, and further, with the vicinity of the apex Vt as an inflection point, a gentler or obtuse pattern than the raised portion formation pattern P1 toward the end There is no.
The second elastic elastic member 20B of this embodiment is different from that of the first embodiment in that it is arranged closer to the waist opening edge side than the first elastic elastic member. It has the effect of assisting shape maintenance and followability to the skin.
That is, the second elastic elastic member 20B passes through the vicinity of the apex Vt of the raised portion formation pattern P1, thereby assisting the movement of the raised portion without breaking the shape of the raised portion, and further gently curving from the vicinity position. By having a pattern toward both side edges of the diaper while being equal, the raised portion is urged toward the skin contact surface side at the time of wearing, and the followability to the skin surface is further enhanced.
In addition, about other structures, such as an exterior body and an absorber, it is the same as that of 1st Embodiment.

[Second comparative form]
Next, a second comparative form will be described. The pants-type disposable diaper X3 according to the second comparative form has a raised portion formation pattern P1 and a follow-up auxiliary pattern P2 by a pair of symmetrically elastic elastic members 20L and 20R that are arranged symmetrically and intersect each other at the center in the width direction. Is formed.
More specifically, as shown in FIG. 4, the curved elastic elastic members 20L and 20R of the present embodiment each have a pair of crotch C in front of reaching the center in the width direction from the one side edge joint Ec to the center in the width direction. The extending direction is suddenly changed to the side, and after extending to the crotch side to a predetermined position, the extending direction is gradually reversed to the waist opening edge direction and extends to the other side edge joint portion Ec. Further, the position of the other side edge joint portion Ec is located closer to the waist opening edge We than the crossing position with the center line in the width direction.
Accordingly, the pair of curved elastic elastic members 20L and 20R intersect at the center in the width direction, and the inflection point of one of the curved elastic elastic members 20L suddenly changes, and the intersection of the other curved elastic elastic member 20R making a pair, A substantially V-shaped pattern is formed at the inflection point at which the other bending elastic expansion / contraction member 20R changes suddenly, and the other side is gradually reversed from the intersection Vt to the waist opening edge direction at a predetermined position. A pattern having a base end at a position passing through the vertex Vt of the substantially V-shaped raised portion formation pattern and closer to the waist opening We than the vertex Vt is formed in the extending region to the edge joint portion.
The substantially V-shaped pattern corresponds to the raised portion formation pattern P1, and the pattern extending from the intersection Vt to the other side corresponds to the followable auxiliary pattern P2.
The position, shape, and the like of the substantially V-shaped raised portion forming pattern P1, for example, the separation distance L1 between the crotch C and the vertex Vt (particularly an intersection in the present embodiment) are the same as those in the first embodiment. However, the separation distance between the apex Vt of the raised portion formation pattern P1 and the followable auxiliary pattern P2 is inevitably 0 mm in this embodiment.
The meaning of the substantially V shape of the raised portion formation pattern P1 is also the same as that in the first embodiment. The divergent shape having a predetermined length in the front-rear direction (depth) and a predetermined skirt width shown in the first embodiment corresponds to a substantially V-shape of the present invention. Moreover, it does not need to be symmetrical.
Furthermore, when the arrangement pattern of the curved elastic elastic members 20L and 20R of the present embodiment is adopted, the preferred thickness of the elastic elastic members is preferably 470 to 960 dtex, particularly 620 to 960 dtex.
The number of the pair of curved elastic elastic members 20L and 20R may be one, but is preferably 2 to 15. In the illustrated example, there are two.
In the present embodiment described above, the arrangement form of the curved elastic stretchable member 20 is different from that of the first embodiment, but the operational effects of each raised portion forming pattern and the followable auxiliary pattern are the same.
Other configurations such as the exterior body and the absorbent body are the same as those in the first embodiment.

[Example of absorber variations]
On the other hand, in the present invention, a low-rigidity portion is formed in the absorbent body 3 along the raised portion formation pattern P1 and the followable auxiliary pattern P2 in order to further improve the formability of the raised portion and the followability of the raised portion to the body. It is desirable to do. The low-rigidity part can be formed, for example, by partially missing or thinning the absorbent core 33.
In the absorbent body of Example X1 ′ shown in FIG. 5, the absorbent core 33 is deficient in a substantially V shape from the waist opening edge We side along the raised portion formation pattern P1. In this portion, the elastic stretch force of the raised portion forming pattern P1 acts more strongly than the other portions, so that the raised portion is easily formed on the skin contact surface side. In FIG. 5, the missing portion is indicated by 33L. In the drawing, the configuration other than the absorbent core of the absorber is omitted for the sake of explanation (the same applies to FIGS. 6 and 7).
In the absorbent body of Example X1 ′ shown in FIG. 6, the absorbent core is missing along the followable auxiliary pattern. In FIG. 6, the missing portion is indicated by 33L. Since the defect portions 33L and 33L have no absorption core and are low in rigidity, the elastic expansion and contraction force of the followable auxiliary pattern acts more strongly than other portions, and the followability of the raised portion to the skin surface is further enhanced. In the example of FIG. 6, the absorbent core is not lost in the vicinity of the vertex Vt of the raised portion formation pattern P1. By configuring in this way, it is possible to prevent a decrease in absorbability as much as possible, and from now on, the entire back body side will follow the skin surface together with the raised portion around the position near the vertex Vt of the absorbent core. , Excellent leakage prevention effect.
In the absorbent body of Example X1 ′ shown in FIG. 7, slit holes 33 s and 33 s are provided side by side along the raised portion formation pattern P <b> 1 of the absorbent core 33. Since the space between the slit holes 33s and 33s of the absorbent core 33 is particularly low in the front-rear direction, the stretch force of the raised portion formation pattern P1 acts more strongly than the other portions, and the raised portions are easily formed. The length of the slit hole and the like are not particularly limited, but it is preferable to make the length about several cm longer than the length (height) of the raised portion formation pattern P1.
In the illustrated example, the arrangement form of the curved elastic elastic member 20 is the arrangement form of the first embodiment, but of course, the arrangement form of the pants-type disposable diaper of the second and third embodiments is adopted. Even if it does, a low-rigidity part can be formed in an absorber.
Moreover, you may form a low-rigidity part along both the protruding part formation pattern P1 and the followable | assistant assist pattern P2.
Here, in order to form a thin portion and a deficient portion in the absorbent core 33, a pile region that is formed by substantially depositing pile pulp or the like provided on the surface of the pile drum for producing the absorbent core. In addition, it is possible to manufacture by appropriately arranging convex portions that prevent the piled pulp or the like from being partially piled.
In addition, the thin portion can be formed by applying pressing or embossing to an appropriate position of the absorbent core.
On the other hand, when providing a thin portion in the absorbent core 33, if there is a concern about a decrease in absorbability at the site, for example, the absorber 3 can be effectively avoided by adopting a structure in which a plurality of absorbent cores are laminated. it can.

  The present invention is applicable to a pants-type disposable diaper.

It is an expanded view of the underpants type disposable diaper of 1st Embodiment. It is a rear view of the underpants type disposable diaper of a 1st embodiment. It is a rear view of the underpants type disposable diaper of the 1st comparative form. It is a rear view of the underpants type disposable diaper of the 2nd comparative form. It is the schematic which shows the example of a variation of an absorber. It is the schematic which shows the example of a variation of an absorber. It is the schematic which shows the example of a variation of an absorber.

  X1 to X3, X1 '... pants-type disposable diaper, 1 ... exterior body, 3 ... absorbent body, 11 ... exterior sheet, 11s ... nonwoven sheet, 20 ... curved elastic elastic member, 20A ... first elastic elastic member, 20B ... 2nd elastic elastic member, 20L, 20R ... curved elastic elastic member, 21 ... waist elastic elastic member, 22 ... elastic elastic member around leg, 31 ... liquid-permeable top sheet, 32 ... liquid-impervious back sheet, 33 ... absorbing core, 33L ... defect, 33s ... slit hole, EL ... leg circumference, Fs ... ventral waist, Bs ... dorsal waist, WO ... waist opening, We ... waist opening edge, LO ... leg circumference Opening part, C ... Crotch, F ... Front body, B ... Rear body, P1 ... Raised part formation pattern, P2 ... Follow-up assisting pattern, Vt ... Vertex of raised part forming pattern, H ... Center width side of diaper, L1 ... Bump formation pattern L2..., The height of the raised portion forming pattern P1, L3... The height of the raised portion forming pattern P1, L4... The second elastic elastic member (following auxiliary pattern) and the raised portion. The separation distance from the vertex Vt of the part formation pattern P1, L5, the separation distance between the first elastic elastic member 20A and the second elastic elastic member 20B at the side edge joint.

Claims (4)

An exterior body in which a front body and a back body are joined at both side edges to form a waist opening and a pair of left and right leg openings;
An absorbent body positioned from the front body to the back body on the inner surface side of the exterior body, and a pants-type disposable diaper comprising:
The exterior body includes a plurality of curved elastic elastic members that bypass the crotch side from the one side edge joint portion of the front body and the back body and reach the other side edge joint portion on the back body, and The elastic member is;
In widthwise central portion, a substantially V-shape protruding to the site that overlaps with the rear end of the absorbent body have suited the crotch side from between the rear end of the absorber and the waist opening of the back body A first elastic stretch member disposed in a raised portion forming pattern that forms a raised portion extending in the front-rear direction on the skin contact surface side in the width direction center of the back body;
It passes through the apex of the substantially V-shaped raised portion forming pattern at the center in the width direction or the vicinity of the crotch side, and is on the waist opening side of the both side edges of the diaper from the apex of the substantially V-shaped raised portion forming pattern. The ridges follow the change in shape of the skin surface that is curved more gently than the ridge formation pattern from the central part in the width direction toward both side edges of the diaper so that both ends are located at a position close to Comprising a second elastic stretch member arranged in a follow-up assisting pattern that assists performance and deformability,
A pants-type disposable diaper characterized in that the first elastic stretchable member and the second elastic stretchable member do not cross each other.   The raised portion forming pattern includes a width direction both side portion extending from both side edges of the diaper along the width direction to the width direction center side of the absorbent body, and a width direction center side of the width direction side portions. The underpants type disposable diaper of Claim 1 which is a pattern which has the said substantially V-shaped part which goes to the crotch side from the edge part of this.   The pants-type disposable diaper according to claim 1 or 2, wherein the followable auxiliary pattern is a pattern passing through both side edges of the absorber.   The pants type according to any one of claims 1 to 3, wherein at least one of a portion along the raised portion formation pattern and a portion along the follow-up assisting pattern is formed at a lower rigidity than the other portion of the absorbent body. Disposable diapers.

Images