JP7351630B2 - Pants type disposable wear article - Google Patents

Description

The present invention relates to a disposable wearing article with improved fit in the groin area.

The pants-type disposable wearing article includes an exterior body that constitutes at least the waist circumference of the front body and the back body, and an interior body that includes an absorbent body and is attached to the exterior body so as to extend from the front body to the back body. Generally, both sides of the front body exterior body and both sides of the back body exterior body are joined to form a side seal, thereby forming a waist opening and a pair of left and right leg openings. (For example, see Patent Document 1).

In such pants-type disposable wearing articles, in order to improve the fit to the body, it is common to provide an elastic structure in the outer body. For example, if a stretchable structure is provided in the torso area defined as the front-rear area corresponding to the side seal part, or in the intermediate area between the front and rear torso areas, it is said that the fit to the body is relatively high. (For example, see Patent Documents 1 to 5).

A typical stretchable structure of a pants-type disposable wearing article includes an elongated elastic member provided between an overlapping first sheet layer and a second sheet layer along the stretch direction and spaced apart from each other. It is something. The first sheet layer and the second sheet layer form a planar elastic area and play the role of covering and concealing the elastic member, and the elastic member built in between the first sheet layer and the second sheet layer is It plays the role of generating power for. At least portions of the elastic member located at both ends of the elastic region are fixed to the first sheet layer and the second sheet layer in a state where the elastic member is stretched in the elastic direction. By this fixing, the elastic member and the first sheet layer and the second sheet layer are integrated, and the first sheet layer and the second sheet layer contract due to the contraction force of the elastic member and form folds (including wrinkle-like ones). They are formed not only in the natural length state but also in the state where the elastic member is stretched (hereinafter simply referred to as folds), and when the elastic member is stretched from this contracted state against the contractile force, folds are formed. is expanded. Normally, the first sheet layer and the second sheet layer are in a unfolded state with no folds at the limit of elastic elongation, are folded as the elastic member contracts, and are most densely folded in the natural length state.

In such a stretchable structure, if the first sheet layer and the second sheet layer are free from each other, one nonwoven fabric layer may partially or completely float relative to the other nonwoven fabric layer, causing unnecessary folds or bulges. The first sheet layer and the second sheet layer need to be joined directly or indirectly over almost the entirety of the first sheet layer and the second sheet layer, since this may cause deterioration of the fit or misalignment when worn. Further, in order to generate stretchability by the elastic member, the elastic member is extended over the entire stretch direction of the stretch region, and at least the portions located at both ends of the stretch region in the stretch direction are covered with the first sheet layer and the second sheet layer. It is necessary that the first sheet layer and the second sheet layer also contract as the elastic member contracts in the natural length state. That is, it is necessary to bond the first sheet layer and the second sheet layer and to fix the elastic member to the first sheet layer and the second sheet layer.

Currently, in most cases, hot melt adhesives are selected as the means for fixing the elastic member to the first sheet layer and the second sheet layer. On the other hand, in order to reduce the amount of hot melt adhesive used, joining between the first sheet layer and the second sheet layer is increasingly performed by welding such as ultrasonic welding. The structure of doing this is also deeply used. In particular, by bonding the first sheet layer and the second sheet layer via a hot melt adhesive at the position of the elastic member, the bonding of the first sheet layer and the second sheet layer, and the bonding of the first sheet layer and the second sheet layer are performed. A dual-purpose structure that also serves to fix the elastic member to the layer is known as the most typical structure.

On the other hand, the waist region and the intermediate region overlap the front-rear region having the absorbent body, and there is an inner-outer joint portion that joins the inner body and the outer body in this range. Therefore, even if an elastic member is provided across the front-rear range of the absorbent body, its expansion and contraction function is limited by the rigidity of the absorbent body. Furthermore, the absorbent body may shrink in the width direction, resulting in poor wearing comfort and appearance, or may cause twisting or cracking of the absorbent body, resulting in a decrease in absorbent performance.

For this reason, in the past, elastic members were attached to the exterior body continuously along the width direction, and the elasticity generated by the elastic members was eliminated in the portions that overlapped with the absorbent body, thereby making the exterior body non-stretchable. Forming regions is practiced (for example, see Patent Documents 1 to 6). When fixing the elastic member and joining the first sheet layer and the second sheet layer using a hot melt adhesive as in the above-mentioned dual-use structure, there are two main methods for eliminating elasticity.

That is, the first method is a method in which the portion of the elastic member located in the non-stretchable region is cut into small pieces. The second method is to form an independent shrinkable portion in a non-stretchable region of the elastic member, which is not fixed to the first sheet layer and the second sheet layer or is weakly fixed with a hot melt adhesive; In this method, the sheet is cut at one point in the width direction of the sheet, and the independently contracted portion is contracted to the natural length or a state close to it without involving the first sheet layer and the second sheet layer. The second method has the advantage that there is only one cutting location compared to the first method.

However, in conventional pants-type disposable wearing articles, there is room for improvement in the fit to the hollow of the wearer's groin area.

Special table 2015-512296 publication Patent No. 5779738 Japanese Patent Application Publication No. 2015-58061 Japanese Patent Application Publication No. 2010-029693 Japanese Patent Application Publication No. 2008-194160 JP2012-029806A

Therefore, the main object of the present invention is to improve the fit to the hollow of the wearer's groin area.

The pants-type disposable wearing article that solved the above problems is as follows.
<First aspect>
An integral exterior body extending from the front body to the back body, or an exterior body provided separately on the front body and the back body,
an interior body including an absorbent body attached to the exterior body so as to extend from the front body to the back body;
a side seal portion in which both sides of the exterior body in the front body and both sides of the exterior body in the back body are respectively joined;
Equipped with a waist opening and a pair of left and right leg openings,
The exterior body includes a non-stretchable region provided in the widthwise central part in a front-back direction range including the side seal portion and the absorbent body, and a lower waist elastic region divided on both sides in the widthwise direction by the non-stretchable region. It has
The lower waist elastic region includes a lower waist elastic member, is contracted in the width direction together with the waist lower elastic member, and is expandable in the width direction together with the waist lower elastic member,
Rising gathers are provided on both sides of the interior body, respectively;
The rising gathers include a root portion attached to both sides of the interior body, a main body portion extending from the root portion to both sides of the surface of the interior body, and a front end and a rear end of the main body portion that are collapsed. a receding portion fixed to the surface of the interior body in a state of and a gathered elastic member;
The rising portion contracts in the front-rear direction together with the gather elastic member and rises from the surface of the interior body, and is expandable in the front-rear direction together with the gather elastic member.
In pants-type disposable wearing articles;
At least the end on the crotch side of the lower waist elastic region of the front body is a high elongation region extending toward the center in the width direction than the rising gathers,
The rising portion and the gathered elastic member extend toward the waist opening side into the high elongation region of the front body.
A pants-type disposable wearing article characterized by:

(effect)
In this pant-type disposable article, since the high stretch region of the waist lower elastic region exists across the hollow of the wearer's groin region, the outer body follows the expansion and contraction of the groove in the groin region and firmly holds the inner body. Can be pushed. However, since the high elongation region does not fit into the inguinal depression, simply providing the high elongation region is insufficient to improve the fit to the inguinal depression, and a gap may occur. Therefore, in this pants-type disposable wearing article, the rising portion of the rising gathers and the gathered elastic member extend to the portion pressed down by this high elongation region. Therefore, the portion of the rising portion having the gathered elastic member can rise to enter the depression of the inguinal region based on the high elongation region that is firmly pressed against the inguinal region. Therefore, in this pants-type disposable wearing article, the fit to the inguinal region is significantly improved.

<Second aspect>
The widthwise dimension of the non-stretchable region in the front-rear direction range having the high stretchable region is less than 1/2 of the widthwise dimension of the absorbent body,
The widthwise dimension of the absorbent body is 1.1 to 1.8 times the interval between the rising gathers on both sides .
A pants-type disposable wearing article according to the first aspect.

(effect)
The dimensions of each part can be determined as appropriate, but in general, it is preferable that it is within the above range because the positional relationship between the high elongation region and the rising gathers will be appropriate and the fit to the inguinal region will be particularly good.

<Third aspect>
The edge of the lower waist elastic region of the front body on the non-elastic region side extends stepwise or continuously from the waist opening side toward the crotch side so as to be located on the center side in the width direction,
The high stretch region is provided only on the crotch side in the waist lower stretch region of the front body.
The pants-type disposable wearing article according to the first or second aspect.

(effect)
Groin depressions are more noticeable on the groin side and rarely occur on the waist side. Therefore, it is preferable to provide the high elongation region only in the portion of the inguinal region where the depression is likely to become deep, thereby improving the fit to the inguinal region while preventing contraction of the absorbent body in other portions.

<Fourth aspect>
The exterior body is a front exterior body and a rear exterior body provided separately in the front body and the back body ,
The front exterior body and the rear exterior body are separated from each other in the front-rear direction on the crotch side,
The interior body extends in the front-rear direction from the front exterior body to the rear exterior body, and is joined to the front exterior body and the rear exterior body, respectively,
The side seal portion is a portion where both side portions of the front exterior body and both side portions of the rear exterior body are respectively joined.
The pants-type disposable wearing article according to any one of the first to third aspects.

(effect)
As a pants-type disposable wearing article, one in which the front exterior body and the rear exterior body are not continuous on the crotch side but are spaced apart in the front-rear direction, as in the present embodiment, is known. Such a two-piece exterior type has the advantage that the exterior body does not need to be cut out to form the leg openings, or even if it is cut out, only a small area is required. That is, since the cut-off piece (trim) is disposed of, it has the advantage that waste of material (trim loss) can be suppressed.

However, in such a pants-type disposable wearing article with a two-piece exterior, the fit around the legs inevitably deteriorates, and especially the fit around the groin area tends to deteriorate. In other words, when wearing pants-type disposable wearing articles with a two-piece exterior, the distance from the crotch area of the inner body to the intersection with the outer body is long, so the inner body tends to swing left and right using the intersection as a fulcrum. This makes it easier for the interior body to move laterally compared to a type that includes an integral exterior body that extends from the front body to the back body. In addition, for pants-type disposable wearing articles with a two-piece exterior, the edge on the crotch side of the exterior body has a straight line along the width direction or a shape close to it, and intersects the side edge of the interior body at a right angle or at an angle close to it. do. These mean that pants-type disposable wearing articles with a two-piece exterior tend to have insufficient fit for the groin area.

Therefore, the above-mentioned formation of the high elongation region and the positional relationship between the high elongation region and the raised gathers have great technical significance, especially when applied to such a pants-type disposable wearing article with a two-part exterior. Become.

<Fifth aspect>
On both sides of the interior body, side flaps extending laterally beyond the rising gathers extend in the front-rear direction from the front exterior body to the rear exterior body,
The side flap has a side elastic region that elastically expands and contracts in the front-rear direction,
The side elastic region includes a side elastic member, is contracted in the front-rear direction together with the side elastic member, and is expandable in the front-rear direction together with the side elastic member,
The side stretchable region extends toward the waist opening side into the high stretchable region of the front body.
The pants-type disposable wearing article according to the fourth aspect.

(effect)
As mentioned above, in pants-type disposable wearing articles with a two-piece exterior, not only is the interior body easy to move laterally, but the crotch side edge of the exterior body intersects the side edge of the interior body at a right angle or at an angle close to it. Therefore, the area that covers the inguinal region has to be small. On the other hand, when the side flaps and side elastic areas are provided as in this embodiment, the side elastic areas elastically support the lateral movement of the interior body, and the side elastic areas cover the sides of the interior body. , gaps are less likely to form next to the interior body.

According to the present invention, advantages such as improved fit to the groin cavity of the wearer are brought about.

FIG. 2 is a plan view showing the inner surface of the pant-type disposable diaper in an unfolded state. FIG. 2 is a plan view showing the outer surface of the pant-type disposable diaper in an unfolded state. 2 is a sectional view taken along line 2-2 in FIG. 1. FIG. 2 is a sectional view taken along line 3-3 in FIG. 1. FIG. (a) A 4-4 sectional view in FIG. 1, and (b) a 5-5 sectional view in FIG. 1. FIG. 1 is a perspective view of a pants-type disposable diaper. FIG. 3 is a plan view showing the outer surface of the interior body in an expanded state together with the outline of the exterior body. FIG. 2 is a sectional view of another example corresponding to the section 4-4 in FIG. 1; 2 is a sectional view of another example corresponding to the 2-2 section in FIG. 1. FIG. FIG. 2 is a sectional view of another example corresponding to the 3-3 section in FIG. 1; 4 is an enlarged view of the main part of FIG. 3. FIG. 9 is an enlarged view of the main part of FIG. 9. FIG. FIG. 3 is an enlarged plan view of the front exterior body. FIG. 3 is an enlarged plan view of the rear exterior body. FIG. 3 is an enlarged plan view of the front exterior body. FIG. 3 is an enlarged plan view of the rear exterior body. FIG. 3 is an enlarged plan view of the front exterior body. FIG. 3 is an enlarged plan view of the rear exterior body. It is a perspective view of a cutting device. FIG. 3 is an enlarged plan view of a non-stretchable region.

Hereinafter, a pants-type disposable diaper will be explained in detail as an example of a pants-type disposable wearing article with reference to the accompanying drawings. The dotted pattern in the cross-sectional view indicates the adhesive used as a joining means for joining each component located on the front and back sides, and may be solid, bead, curtain, summit, or spiral application of hot melt adhesive, or pattern coating. (transferring hot melt adhesive using a letterpress method), or alternatively or in addition to this, the fixed part of the elastic member is formed by applying it to the outer circumferential surface of the elastic member using a comb gun or SureWrap coating. be. Examples of hot melt adhesives include EVA adhesives, adhesive rubber adhesives (elastomer adhesives), olefin adhesives, and polyester/polyamide adhesives, which can be used without particular limitation. As a joining means for joining each component, means by material welding such as heat sealing or ultrasonic sealing can also be used.

1 to 6 show an example of a pants-type disposable diaper. This pants-type disposable diaper includes a rectangular front exterior body 12F that constitutes at least the waist circumference of the front body F, a rectangular rear exterior body 12B that constitutes at least the waist circumference of the back body B, and a rectangular rear exterior body 12B that constitutes at least the waist circumference of the front body F, and a section between the front body 12F and the crotch. The interior body 200 is provided inside the exterior bodies 12F and 12B so as to extend through the rear exterior body 12B. Both sides of the front exterior body 12F and both sides of the rear exterior body 12B are joined to form a side seal portion 12A, which allows the opening formed by the front and rear ends of the exterior bodies 12F and 12B to be opened to the wearer. A waist opening WO through which the torso passes is formed, and a portion surrounded by the lower edges of the exterior bodies 12F, 12B and the side edges of the interior body 200 on both widthwise sides of the interior body 200 serves as a leg opening LO through which the legs are passed. The inner body 200 is a part that absorbs and holds excrement such as urine, and the outer bodies 12F and 12B are parts that support the inner body 200 against the wearer's body. Further, the symbol Y indicates the total length of the diaper in the unfolded state (the length in the front-rear direction from the edge of the waist opening WO in the front body F to the edge of the waist opening WO in the back body B), and the symbol X indicates the diaper in the unfolded state. The full width is shown.

This pants-type disposable diaper has a waist area T defined as a front-back range (a front-back range from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A, and a front-back direction of the part forming the leg opening LO. It has an intermediate region L defined as a range (between the front-rear region having the side seal portion 12A of the front body F and the front-rear region having the side seal portion 12A of the back body B). The waist region T can be conceptually divided into a "waist region" W forming the edge of the waist opening, and a "lower waist region" U being a region below this. Normally, when the waist area T has a boundary where the elastic stress in the width direction WD changes (for example, the thickness or elongation rate of the elastic member changes), the waist opening WO side is closer to the waist than the boundary closest to the waist opening WO. If there is no such boundary, the waist extending portion 12E that extends toward the waist opening WO from the absorbent body 56 or the inner body 200 becomes the waist portion W. These lengths in the front-rear direction vary depending on the size of the product and can be determined as appropriate. For example, the waist part W can be 15 to 40 mm, and the lower waist part U can be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are constricted in a U-shape or a curved shape along the circumference of the wearer's legs, and these are the parts into which the wearer's legs are inserted. As a result, the pant-type disposable diaper in the unfolded state has a generally hourglass shape as a whole.

(Interior body)
Although the interior body 200 can have any shape, it is rectangular in the illustrated example. As shown in FIGS. 3 to 5, the interior body 200 includes a top sheet 30 facing the body, a liquid-impermeable sheet 11, and an absorbent element 50 interposed between these. This is the main body that has an absorption function. Reference numeral 40 indicates an intermediate sheet (second sheet) provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer the liquid that has permeated through the top sheet 30 to the absorbent element 50; 2 shows riser gathers 60 extending from both sides of the interior body 200 so as to come into contact with the wearer's legs in order to prevent excrement from leaking to both sides of the interior body 200.

(Top sheet)
The top sheet 30 has a property of permeating liquid, and may be made of, for example, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, and the like. Further, the top sheet 30 may be made of a single sheet, or may be made of a laminated sheet obtained by laminating two or more sheets together. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

Both side portions of the top sheet 30 may be folded back at the side edges of the absorbent element 50, or may be allowed to protrude laterally from the side edges of the absorbent element 50 without being folded back.

The top sheet 30 may be fixed to a member adjacent to the back side using a bonding means such as heat sealing or ultrasonic sealing or hot melt adhesive for the purpose of preventing misalignment with respect to the back side member. desirable. In the illustrated example, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.

(intermediate sheet)
In order to quickly transfer the liquid that has permeated through the top sheet 30 to the absorbent body, an intermediate sheet (also called a "second sheet") 40, which has a higher liquid permeation rate than the top sheet 30, can be provided. This intermediate sheet 40 is for quickly transferring the liquid to the absorbent body, improving the absorption performance of the absorbent body, and preventing the phenomenon of “returning” of the absorbed liquid from the absorbent body. The intermediate sheet 40 can also be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bonded nonwoven fabric, or crepe paper. In particular, air-through nonwoven fabrics are preferred because they are bulky. It is preferable to use a composite fiber with a core-sheath structure for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) with high rigidity is preferable. The basis weight is preferably 17 to 80 g/m ² , more preferably 25 to 60 g/m ² . The thickness of the raw material fibers of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers whose core is not in the center, hollow fibers, or eccentric and hollow fibers as the mixed fibers for all or part of the raw material fibers.

Although the intermediate sheet 40 in the illustrated example is shorter than the width of the absorber 56 and is arranged at the center, it may be provided over the entire width. The length of the intermediate sheet 40 in the front-back direction may be the same as the entire length of the diaper, the length of the absorbent element 50, or may be within a short length range centered on the liquid receiving area.

The intermediate sheet 40 may be fixed to a member adjacent to the back side using a bonding means such as heat sealing or ultrasonic sealing or hot melt adhesive for the purpose of preventing misalignment of the intermediate sheet 40 with respect to the member on the back side. desirable. In the illustrated example, the intermediate sheet 40 is fixed to the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.

(liquid impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but includes, for example, a plastic film made of olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric with a plastic film on the surface of the nonwoven fabric, and a plastic film. Examples include laminated sheets in which nonwoven fabrics and the like are laminated and bonded. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impermeable and moisture-permeable material that is preferred from the viewpoint of preventing stuffiness. Moisture-permeable plastic films include microporous plastic films obtained by kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching it uniaxially or biaxially. is widely used. Other methods include non-woven fabrics using micro-denier fibers, strengthening leak-proofing by reducing fiber pores by applying heat or pressure, and coating with super absorbent or hydrophobic resins or water repellent agents. Accordingly, a liquid-impermeable sheet without using a plastic film can also be used as the liquid-impermeable sheet 11, but it must have sufficient adhesive strength when bonded to the cover nonwoven fabric 13 via a hot melt adhesive, which will be described later. In order to obtain this, it is desirable to use a resin film.

The liquid-impermeable sheet 11 has a width that fits on the back side of the absorbent element 50 as shown in the figure, and also wraps around both sides of the absorbent element 50 so as to fit on the side surface of the top sheet 30 of the absorbent element 50 in order to improve leakage prevention. It can also extend to both sides. The appropriate width of this extending portion is about 5 to 20 mm on each side.

(absorption element)
The absorbent element 50 includes an absorbent core 56 and a packaging sheet 58 that completely wraps around the absorbent core 56. The packaging sheet 58 can also be omitted.

(Absorber)
The absorbent body 56 can be formed from an aggregate of fibers. These fiber aggregates include those obtained by stacking short fibers such as cotton pulp and synthetic fibers, as well as filament aggregates obtained by opening tows (fiber bundles) of synthetic fibers such as cellulose acetate as necessary. can also be used. The fiber weight can be, for example, about 100 to 300 g/m ² when stacking cotton-like pulp or short fibers, and about 30 to 120 g/m ² in the case of filament aggregates. I can do it. The fineness of synthetic fibers is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament assembly, the filaments may be non-crimped fibers, but are preferably crimped fibers. The degree of crimps of the crimped fibers can be, for example, about 5 to 75 crimps, preferably 10 to 50 crimps, and more preferably 15 to 50 crimps per 2.54 cm. Further, crimped fibers that are uniformly crimped can be used. Preferably, superabsorbent polymer particles are dispersed and retained in the absorbent body 56.

The absorbent body 56 may have a rectangular shape, but as shown in FIG. This is preferable because the fit of the riser gathers 60 around the legs is improved.

Further, the dimensions of the absorbent body 56 can be determined as appropriate as long as they extend to the front, back, left and right of the urinary opening position, but it is preferable that the absorber 56 extends to or near the peripheral edge of the interior body 200 in the front-rear direction LD and the width direction WD. . In addition, the code|symbol 56X has shown the full width of the absorber 56.

(Super absorbent polymer particles)
The absorbent body 56 can contain superabsorbent polymer particles in part or in whole. The term "superabsorbent polymer particles" includes "powder" in addition to "particles." As the superabsorbent polymer particles, those used in this type of disposable diapers can be used as they are. It is desirable that the proportion of particles remaining on the sieve is 30% by weight or less, and when sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1:2006), the proportion of particles remaining on the sieve is 60% by weight or less. % by weight or more is desirable.

Although any material can be used for the superabsorbent polymer particles without particular limitation, those with a water absorption of 40 g/g or more are preferred. Superabsorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based particles, including starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and cross-linked sodium carboxymethyl cellulose. Materials such as acrylic acid (salt) and acrylic acid (salt) polymers can be used. The shape of the superabsorbent polymer particles is preferably a commonly used powder or granule, but other shapes can also be used.

As the superabsorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption rate is too slow, the liquid supplied into the absorbent body 56 tends to return to the outside of the absorbent body 56, which is called backflow.

Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even when the absorbent body 56 is bulky, the sticky feeling after liquid absorption can be effectively suppressed.

The basis weight of the superabsorbent polymer particles can be determined as appropriate depending on the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be generalized, it can be set at 50 to 350 g/m ² . If the basis weight of the polymer is less than 50 g/m ² , it becomes difficult to ensure sufficient absorption. When it exceeds 350 g/m ² , the effect is saturated.

(packaging sheet)
When the packaging sheet 58 is used, tissue paper, especially crepe paper, nonwoven fabric, polylaminated nonwoven fabric, a perforated sheet, etc. can be used as the material. However, it is desirable that the sheet be a sheet that does not allow the superabsorbent polymer particles to escape. When using a nonwoven fabric instead of crepe paper, a hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and its material may be polypropylene, polyethylene/polypropylene composite, or the like. The basis weight is preferably 5 to 40 g/m ² , particularly 10 to 30 g/m ² .

The packaging structure of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of superabsorbent polymer particles from the front and rear edges, a cylinder is used to surround the front and back surfaces and both side surfaces of the absorbent body 56. It is preferable to wrap the absorbent body into a shape, with its front and rear edges protruding from the front and rear sides of the absorber 56, and to join the overlapping portions and the overlapping portions of the front and rear protruding portions using a joining means such as hot melt adhesive or material welding.

(get up and gather)
The rising gathers 60 has a rising portion 68 that rises from the side of the interior body 200, and this rising portion 68 comes into contact with the range from the wearer's groin area through the leg area to the buttocks to prevent side leakage. It is something. In the illustrated rising gathers 60, the base portion 60B stands up obliquely toward the center in the width direction, and the tip end portion 60A stands up obliquely toward the outside in the width direction from the middle portion. It is not limited to this, and appropriate changes can be made, such as one that stands up on the center side in the width direction as a whole.

To explain in more detail, the raised gathers 60 in the illustrated example is made by folding a band-shaped gather sheet 62 having a length equal to the length of the interior body 200 in the front-rear direction in the width direction WD at the tip and folding it in half. In addition to overlapping, a plurality of elongated gather elastic members 63 are fixed at intervals in the width direction WD in a stretched state along the longitudinal direction between the folded portions and the sheets in the vicinity thereof. The proximal end portion of the rising gathers 60 located on the opposite side to the tip portion (the end portion on the opposite side to the sheet folded portion in the width direction WD) is fixed to the side portion of the interior body 200 on the back side of the liquid-impermeable sheet 11. A portion other than the root portion 65 is a main body portion 66 (a portion on the folded portion side) extending from the root portion 65. Further, the main body portion 66 includes a root portion 60B extending toward the center in the width direction, and a tip portion 60A that is folded back at the tip of the root portion 60B and extending outward in the width direction. Both end portions of the main body portion 66 in the front and back direction are set as a collapsed portion 67 that is fixed to the side surface of the top sheet 30 in a collapsed state, while the intermediate portion in the front and rear direction located between these ends is not fixed. A gathered elastic member 63 along the front-rear direction LD is fixed to at least the distal end portion of the rising portion 68 in an extended state.

In the rising gathers 60 configured as described above, the rising portion 68 rises to come into contact with the skin as shown by the arrow in FIG. 3 due to the contraction force of the gather elastic member 63. In particular, when the base portion 65 is located on the back side of the interior body 200, the rising portion 68 stands up in the crotch region and its vicinity so as to open outward in the width direction, so that the rising gathers 60 come into contact with the area around the legs. This will improve the fit. The root portion 65 can also be fixed to the front side of the interior body 200, for example, to the surface of both sides of the top sheet 30.

Like the rising gathers 60 in the illustrated example, the main body portion 66 is bent to consist of a root side portion 60B that extends toward the center in the width direction, and a tip side portion 60A that is folded back at the tip of this root side portion 60B and extends outward in the width direction. In the structure, the tip side portion 60A and the base side portion 60B are joined in a laid down state at the laid down portion 67, and the base side portion 60B is joined to the top sheet 30 in a laid down state. For joining the opposing surfaces in the collapsed portion 67, at least one of hot melt adhesives using various coating methods and material welding methods such as heat sealing and ultrasonic sealing can be used. In this case, the joining of the root side portion 60B and the top sheet 30 and the joining of the tip side portion 60A and the root side portion 60B may be performed by the same means or by different means. For example, it is preferable that the root side portion 60B and the top sheet 30 be joined using a hot melt adhesive, and that the tip side portion 60A and the root side portion 60B be joined by material welding.

The gather sheet 62 is made of a flexible nonwoven fabric with excellent uniformity and hiding properties such as spunbond nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), melt blown nonwoven fabric, etc., and water repellent with silicone etc. as necessary. Those that have been treated can be suitably used. In this case, the fiber basis weight of the nonwoven fabric is preferably about 10 to 30 g/m ² . As the gather elastic member 63, a rubber thread or the like can be used. When using spandex rubber thread, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate of the gathered elastic member 63 in the attached state is preferably 150 to 350%, more preferably 200 to 300%. The number of gather elastic members 63 is preferably 2 to 6, more preferably 3 to 5. The appropriate spacing between the gather elastic members 63 is 3 to 10 mm. With this configuration, the area in which the gathered elastic member 63 is arranged can easily come into contact with the skin. The gather elastic member 63 may be arranged not only on the tip side but also on the base side.

In the rising portion 68 of the rising gathers 60, hot melt adhesive, heat sealing, and ultrasonic waves are applied by various application methods to bond the inner and outer layers of the gather sheet 62 and to fix the gather elastic member 63 sandwiched therebetween. At least one of fixing means by material welding, such as a seal, can be used. If the entire surfaces of the inner layer and outer layer of the gather sheet 62 are bonded together, the flexibility will be lost, so it is preferable that the portions of the gather elastic member 63 other than the bonded portions are not bonded or bonded weakly. In the illustrated example, the gathered elastic member 63 is coated with hot melt adhesive only on the outer peripheral surface of the gathered elastic member 63 using a coating means such as a comb gun or a sure wrap nozzle, and is sandwiched between the inner and outer layers of the gathered sheet 62. The structure is such that the gather elastic member 63 is fixed to the inner layer and outer layer of the gather sheet 62, and the inner layer and outer layer of the gather sheet 62 are fixed using only the hot melt adhesive applied to the outer peripheral surface of the gather sheet 62. There is.

Similarly, for fixing the collapsed portion 67, at least one of hot melt adhesives using various coating methods and material welding methods such as heat sealing and ultrasonic sealing can be used.

(side flap)
Side flaps 70 extending to the sides of the absorbent body 56 are provided on both sides of the interior body 200, and it is preferable that side flaps 70 are formed with side elastic regions SG that extend and contract in the front-rear direction. The illustrated side flap 70 includes one or more elongated side elastic members 73 provided along the front-rear direction LD at intervals, and a first sheet facing the outside of the side elastic members 73. layer 71 and a second sheet layer 72 facing inside of the side elastic member 73.

The sheet material forming the first sheet layer 71 and the second sheet layer 72 is not particularly limited, and any appropriate nonwoven fabric can be selected, such as the nonwoven fabric that can be used in the riser gathers 60 described above or the exterior bodies 12F and 12B described above. . In the examples shown in FIGS. 3, 4, and 11, the gather sheet 62 of the rising gathers 60 is extended to form the first sheet layer 71 and the second sheet layer 72, as described later. As shown in FIGS. 9, 10, and 12, the side flaps 70 may be constructed by adding a special sheet material 79 other than the rising gathers 60. In the former case, the front and rear ends of the side flaps 70 coincide with the front and rear ends of the rising gathers 60 (that is, in this case, the front and rear ends of the interior body 200), but in the latter case, the front and rear ends of the side flaps 70 coincide with the front and rear ends of the rising gathers 60. It may be located closer to the center in the front-rear direction than the end.

The side elastic members 73 are not particularly limited either, and an elongated elastic member similar to the aforementioned gather elastic member 63 can be used. The elongation rate of the side elastic member 73 in the attached state is preferably 150 to 350%, more preferably 200 to 270%. The number of side elastic members 73 is preferably 2 to 16, more preferably 6 to 10. The appropriate spacing between the side elastic members 73 is 5 to 10 mm.

The side elastic members 73 are fixed to the first sheet layer 71 and the second sheet layer 72. For bonding the first sheet layer 71 and the second sheet layer 72 and fixing the side elastic member 73 sandwiched between them, hot melt adhesive HM is applied using various coating methods, and material welding is performed using heat sealing, ultrasonic sealing, etc. Fixing means can be used. If the bonding area of the first sheet layer 71 and the second sheet layer 72 is large, flexibility will be impaired, so it is preferable that the portions of the side elastic members 73 other than the bonded portions are not bonded or are bonded weakly. In the illustrated example, by applying the hot melt adhesive HM only to the outer circumferential surface of the side elastic member 73 using a coating means such as a comb gun or a sure wrap nozzle, and sandwiching it between the first sheet layer 71 and the second sheet layer 72, The side elastic member 73 can be fixed to the first sheet layer 71 and the second sheet layer 72, and the first sheet layer 71 and the second sheet layer can be fixed using only the hot melt adhesive HM applied to the outer peripheral surface of the side elastic member 73. It has a structure that fixes between 72 and 72.

The attachment range of the side elastic member 73 in the front-rear direction, that is, the range in the front-rear direction in which the side elastic region SG is formed, can be determined as appropriate, but it may be the same as or more than the range in the front-rear direction of the non-joined portion 77, which will be described later. Preferably, the range is wide. Further, it is also preferable that the range of the side elastic region SG in the front-rear direction is the same as the contracted portion of the rising gathers 60 by the gather elastic member 63 , or extends further in the front-rear direction.

The side flap 70 has three or more sheet layers including a first sheet layer 71 and a second sheet layer 72. That is, in addition to the innermost sheet layer 74 and the outermost sheet layer 75, there is at least one inner sheet layer 76 located between them. Some or all of these sheet layers may be formed from separate sheet materials, or may be formed by folding back one sheet material once or multiple times. The inner sheet layer 76 can be appropriately selected from the above-mentioned gathered sheet 62, the liquid-impermeable sheet 11, or the same nonwoven fabric as the exterior bodies 12F and 12B described later, as well as the above-mentioned gathered sheet 62, It can be formed by extending or folding the liquid-impermeable sheet 11 as appropriate.

It is preferable that the side flap 70 has a non-joined portion 77 where at least one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping the back thereof are not joined. Further, the non-jointed portion 77 is a portion that continues continuously or intermittently in the front-rear direction LD in the width direction WD including the region between the side elastic member 73 located at the most lateral side and the side edge of the side flap 70. It is. In other words, as long as either one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping on the back thereof are not bonded, the non-bonded portion 77 is formed between some or all of the other layers. may be bonded, or all sheet layers in the thickness direction may be non-bonded. For example, in the non-joined portion 77 shown in FIGS. 3, 4, and 11, the part where the innermost sheet layer 74 and the inner sheet layer 76 overlapping the back side are not joined is located at the most lateral side from the side edge. The part where the outermost sheet layer 75 and the inner sheet layer 76 overlapping the outermost sheet layer 76 are not joined continues to the center side in the width direction up to the fixed position of the side elastic member 73 . In the non-bonded portion 77 of the example shown in FIGS. 9, 10, and 12, the innermost sheet layer 74 and the inner sheet layer 76 overlapping the back thereof are non-bonded, and the outermost sheet layer 75 and the back thereof are not bonded. The part that is not joined to the inner sheet layer 76 that overlaps with the inner sheet layer 76 continues from the side edge to the center in the width direction than the fixed position of the side elastic member 73 that is the most lateral, but the former is closer to the center in the width direction It continues to the side.

The dimension of the non-joint portion 77 in the width direction WD can be determined as appropriate, but is preferably 2 to 15 mm, particularly preferably 5 to 10 mm. Further, the dimension of the non-jointed portion 77 in the front-rear direction LD is preferably 30% or more, particularly 40% or more of the total product length Y. In addition, in the case of a pants-type disposable wearing article in which the front exterior body 12F and the rear exterior body 12B are separated from each other like the illustrated example, the non-joined portion 77 extends to a position where they overlap with the front exterior body 12F and the rear exterior body 12B, respectively. It is preferable. In this case, it is preferable that the non-jointed portion 77 extends over the entire length of the interior body 200 in the front-rear direction LD. Further, the non-jointed portion 77 extends only to a position between the front and rear edges of the interior body 200 and the elastic members 16 and 19 of the front exterior body 12F and the rear exterior body 12B closest to the leg opening LO. is also preferable. Further, the non-jointed portion 77 is connected to the elastic members 16 and 19 closest to the leg opening LO in the front exterior body 12F and the rear exterior body 12B, and the edge of the leg opening LO (the rear edge of the front exterior body 12F and the front side of the rear exterior body 12B). It may extend only to a position between the edges).

Further, a gap between at least one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping the back side thereof is closed on both sides of the non-joint portion 77 in the width direction WD. As shown in the illustrated example, one side of the gap in the non-joined portion 77 is closed by folding back the sheet material forming the innermost sheet layer 74 or the outermost sheet layer 75 at the side edge of the side flap 70, and the other side is closed. It can be closed by joining sheet layers adjacent in the thickness direction at appropriate locations using hot melt adhesive HM, welding means, or the like. Of course, both sides of the gap in the non-joint portion 77 can also be closed in the same way, for example by folding back the sheet material or by hot melt adhesive HM.

In this pants-type disposable diaper, the side flaps 70 contract in the front-rear direction LD as the side elastic members 73 contract, and as shown in FIG. It is formed. That is, the pleats of the side stretchable regions SG are formed in a portion of the side flap 70 including the non-joined portion 77 so as to be lined up in the front-rear direction LD. Here, the non-joint part 77 is a part where at least one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping the back thereof are not joined, and the gap between the sheet layers is , are closed on both sides of the non-joint portion 77 in the width direction WD. In addition, the non-jointed portion 77 has a widthwise WD range including a region between the side elastic member 73 located at the most lateral side and the side edge of the intermediate region L (a widthwise WD range that is equal to or greater than the region). range) and continues in the front-rear direction LD. That is, in the non-joining portion 77, a hollow portion surrounded by the sheet layer continues in the front-rear direction LD. As a result, the folds formed in the non-jointed portion 77 are formed by large expansion of at least one of the innermost sheet layer 74 and the outermost sheet layer 75, and are large and soft (that is, rich in cushioning properties). Become. Therefore, these large soft folds are formed on the inner side, outer side, both inner and outer sides of the side flap 70 including the side edges, or on the entire thickness direction, so that the end portion of the leg opening LO feels good to the touch.

The side elastic member 73 may be located near the side edge of the side flap 70, but the side elastic member 73 may be located in the vicinity of the side edge of the side flap 70 from the side edge to the center side in the width direction WD by 2 to 15 mm (particularly 5 to 10 mm). , it is preferable that the side elastic member 73 is not included, and a part or all of the non-joint part 77 is included. In this way, if the side elastic member 73 is sufficiently spaced from the side edge of the side flap 70 and the spaced apart part includes part or all of the non-joined part 77, it may be difficult to hold the product by hand when installing or purchasing the product. Since large folds rich in flexibility and cushioning are formed in the entire lateral thickness direction of the part that is pressed against the skin during wear or wearing (that is, the part having the side elastic members 73), the ends of the leg openings LO This is particularly preferred for improving the feel of the skin.

Although the positional relationship between the non-bonded portion 77 and the side elastic member 73 can be determined as appropriate, as shown in the illustrated example, it is preferable to have at least one side elastic member 73 at a position overlapping the non-bonded portion 77 in the thickness direction. This is preferable because the contractile force of the side elastic member 73 is directly applied to the non-bonded portion 77, and the shape retention of the folds in the non-bonded portion 77 is improved.

In the non-joined portion 77, the inner sheet layer 76 overlapping the innermost sheet layer 74 or the outermost sheet layer 75 may be fixed to the adjacent sheet layer on the opposite side as shown in FIG. (The first sheet layer 71 and the second sheet layer 72 in the illustrated example are bonded to each other with a hot melt adhesive HM), but as shown in FIG. It is particularly preferred that it is not fixed to the layer. As a result, folds are independently formed in the inner sheet layer 76 due to the contraction force of the side elastic members 73. In other words, the large swollen folds formed on the side flaps 70 are supported by the folds of the internal sheet layer 76 formed independently on the inside thereof, so that folds with better cushioning properties are formed on the side flaps 70. Become so.

As illustrated, the side flap 70 has a folded sheet layer folded back at the side edge of the side flap 70, and at least one of the innermost sheet layer 74 and the outermost sheet layer 75 of the side flap 70. It is preferable that the folded sheet layer is located on one side across the folding position of the folded sheet layer because the cushioning properties of the folds formed in the non-joined portion 77 are particularly improved due to the restoring force against folding. The folded sheet layer means a pair of layers formed by folding back a sheet material.

One preferred example is the structure shown in FIG. This side flap 70 has double folded sheet layers folded back at its side edges. The innermost sheet layer 74 and the outermost sheet layer 75 of the non-joined portion 77 are an inner part and an outer part, respectively, sandwiching the folding position of the folded sheet layer located outside, and form an inner sheet. The layer 76 includes an inner portion and an outer portion across the folding position of the folded sheet layer located inside. In addition, the first sheet layer 71 and the second sheet layer 72 are respectively arranged on the inner side across the folding position of the folded sheet layer located inside, and on the inner side across the folded position of the folded sheet layer located on the outside. contains parts. Further, the non-joined portion 77 is a portion where a portion outside the folded sheet layer located on the outside with the folding position sandwiched therein and a portion outside the folded sheet layer located on the inside with the folded position sandwiched therebetween are not joined. Contains. In this structure, by arranging double folded sheet layers, it is possible to form two sheet layers other than the first sheet layer 71 and the second sheet layer 72, and each of them has a restoring force against folding. Therefore, pleats having better cushioning properties can be formed in the side flap 70 using less sheet material.

Another preferred example is the structure shown in FIG. This side flap 70 has double folded sheet layers folded back at its side edges, and the first sheet layer 71 and the second sheet layer 72 each have a folding position of the folded sheet layer located inside. It includes a portion on one side and a portion on the other side (that is, the first sheet layer 71 and the second sheet layer 72 are both the inner sheet layer 76). Further, the innermost sheet layer 74 and the outermost sheet layer 75 in the non-joined portion 77 are a portion on one side and a portion on the other side, respectively, with the folding position of the folded sheet layer located outside sandwiched therebetween. The non-joined portion 77 is a portion where the innermost sheet layer 74 and the first sheet layer 71 that overlaps on the back thereof are not joined, and a portion where the outermost sheet layer 75 and the second sheet layer 72 that overlaps on the back thereof are not joined. is the part that is not joined. In this structure, the folds formed in the non-joining part 77 are formed at least on both the inner and outer sides of the range including the side edges of the intermediate region L, so that the end of the leg opening LO feels good to the touch on both the inner and outer sides. . In addition, since the innermost sheet layer 74 and the outermost sheet layer 75 are on one side and the other side across the folding position of the folded sheet layer located outside, the restoring force against folding prevents the folding. The pleats formed in the joint portion 77 have particularly high cushioning properties.

When the non-joining portion 77 has a four-layer structure as in these examples, it is preferable to construct the side flap 70 using the gather sheet 62 of the rising gathers 60 as in the example shown in FIG. That is, the above-mentioned folded sheet layer of the side flap 70 includes a first portion P1 formed by a two-layer structure of the gather sheet 62 of the rise gathers 60 extending from the starting point of the rise gathers 60 to the side edge of the side flap 70; The two-layer structure of the gather sheet 62 of the raised gathers 60 can be formed by folding back at the side edges of the side flaps 70 and forming a second portion P2 extending toward the center in the width direction WD.

(exterior body)
The exterior bodies 12F, 12B include a rectangular front exterior body 12F, which is a portion of the front body F that constitutes at least the waist circumference, and a rectangular rear exterior body 12B, which is a portion that constitutes at least the waist circumference of the back body B. The front exterior body 12F and the rear exterior body 12B are not continuous on the crotch side, but are separated in the front-rear direction LD (two-piece exterior type). This distance in the front-rear direction can be, for example, about 40 to 60% of the total length Y. In the illustrated example, the lower edges of the front exterior body 12F and the rear exterior body 12B are linear along the width direction WD, but the lower edge of at least one of the front exterior body 12F and the rear exterior body 12B is along the leg circumference. It may be curved like this. Further, as shown in FIG. 8, the exterior body 12 may be integral and continuous from the front body F to the back body B passing through the crotch (exterior integral type).

The exterior bodies 12F, 12B have a waist circumference portion that corresponds to the waist circumference region T and corresponds to a front-back direction range. In addition, in this example, the rear exterior body 12B is longer in the longitudinal direction than the front exterior body 12F, and although the front exterior body 12F does not have a portion corresponding to the intermediate region L, the rear exterior body 12B does not have a portion corresponding to the intermediate region L. The body 12B has a buttock cover portion C extending from the waist region T toward the intermediate region L side. Although not shown, the front exterior body 12F may also be provided with an inguinal cover portion extending from the waist region T to the intermediate region L side, or may have a structure in which an inguinal cover portion is provided but no buttock cover portion is provided, or the front exterior body 12F and It is not necessary to provide a portion corresponding to the intermediate region L on both rear exterior bodies 12B.

As shown in FIGS. 4 and 5, the exterior bodies 12F and 12B include an inner sheet layer 12H, an outer sheet layer 12S, and elastic members 15 to 19 provided between them. Each sheet layer may be made of a common sheet material or may be made of individual sheet materials. That is, in the former case, in part or all of the exterior body, the inner and outer parts of a single sheet material that is folded back at appropriate positions such as the edge of the waist opening WO or the edge of the leg opening LO side. Elastic members 15-19 can be provided between them. In the illustrated example, the waist portion W has a portion including a folded back portion of the sheet material. For example, in the waist region W, the sheet material forming the outer sheet layer 12S extends only to the edge of the waist opening WO, but the sheet material forming the inner sheet layer 12H is similar to the sheet material forming the second sheet layer. It wraps around the waist edge of the material and is folded back inside. Further, this folded portion serves as an interior cover layer 12r that extends over the entire width direction of the exterior body up to a position overlapping the end portion of the interior body 200 on the side of the waist opening WO. The interior cover layer 12r may be formed by pasting a special sheet material instead of folding back the sheet material forming the inner sheet layer 12H.

In order to improve the fit around the wearer's waist, the exterior bodies 12F and 12B incorporate elastic members 15 to 19, and an elastic region A2 is formed that elastically expands and contracts in the width direction WD as the elastic members expand and contract. ing. In this elastic region A2, the exterior bodies 12F and 12B contract with the contraction of the elastic member in their natural length state, forming wrinkles or folds, and when the elastic member is stretched in the longitudinal direction, they are completely stretched without wrinkles. Expansion is possible up to a predetermined expansion rate. As the elastic members 15 to 19, in addition to elongated elastic members such as rubber thread (as shown in the drawings), known elastic members such as band-shaped, net-shaped, and film-shaped elastic members can be used without particular limitation. The elastic members 15 to 19 may be made of synthetic rubber or natural rubber.

To explain the elastic members 15 to 19 in the illustrated example in more detail, a plurality of waist elastic members 17 are arranged at intervals in the front-back direction in the waist portions W of the exterior bodies 12F and 12B so as to be continuous over the entire width direction WD. It is installed with a blank space. Also, one or more of the waist elastic members 17 disposed in the region adjacent to the lower waist portion U may overlap with the interior body 200, or the widthwise central portion that overlaps with the interior body 200. may be provided on both sides of the width direction. The waist elastic member 17 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 , especially 0.1 to 1.0 mm). It is preferable to provide about ² to 15, especially about 4 to 10 rubber threads at intervals of 2 to 12 mm, particularly 3 to 7 mm, and this will increase the elongation of the waist portion W in the width direction WD. The ratio is preferably about 150 to 400%, particularly about 220 to 320%. Furthermore, it is not necessary to use the waist elastic member 17 of the same thickness or the same elongation rate in the entire front-rear direction LD of the waist part W; for example, the waist elastic member 17 does not need to have a thicker The sheath elongation rates may be different.

Further, it is preferable that a plurality of waist lower elastic members 15, 19 made of elongated elastic members are attached to the waist lower part U of the exterior bodies 12F, 12B at intervals in the front-rear direction. The waist lower elastic members 15, 19 have 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 , especially 0.1 to 1 It is preferable to provide about 5 to 30 rubber threads of 1 to 15 mm, ^especially 3 to 8 mm, and the elongation rate of the lower waist part U in the width direction WD is 200 to 350%. In particular, it is preferably about 240 to 300%.

Further, it is preferable that a cover elastic member 16 made of an elongated elastic member is attached to the buttock cover C of the rear exterior body 12B. The buttock cover portion C is contracted toward the center in the width direction WD by the cover portion elastic member 16. The cover 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 , especially 0.1 to 1.0 mm). It is preferable to provide a rubber thread of about ² ), and the elongation rate of the buttock cover portion C in the width direction WD is preferably 150 to 300%, particularly 180 to 260%.

On the other hand, when providing an inguinal cover part on the front exterior body 12F, a cover part elastic member can be provided similarly to the buttock cover part C.

When the elastic members 15, 16, 19 are provided in the front-rear direction range including the absorbent body 56, as in the lower waist part U and the buttocks cover part C in the illustrated example, some or all of the elastic members 15, 16, and 19 are provided in the width direction of the absorbent body 56. In order to prevent contraction of the WD, a widthwise intermediate portion including a part or all of the portion overlapping with the absorber 56 in the width direction WD (preferably including the entirety of the inner and outer joint portions 201 and 202) is set as a non-stretchable region A1. , it is preferable that both sides in the width direction are made into elastic areas A2. Although it is preferable that the waist portion W has an elastic region A2 over the entire width direction WD, similarly to the lower waist portion U, a non-elastic region A1 may be provided in the middle in the width direction. Of the stretchable region A2, a portion located in the front-rear direction LD range having the side seal portion 12A becomes a waist lower stretchable region A3.

Such stretchable region A2 and non-stretchable region A1 supply the elastic members 15 to 17, 19 between the inner sheet layer 12H and the outer sheet layer 12S, and the elastic members 15, 16, 19 are connected to the stretchable region A2. After fixing only the positioned portion with hot melt adhesive, in the region having the absorber 56, the elastic members 15, 16, 19 are cut at one point in the middle in the width direction by pressure and heating, or the elastic member 15 is , 16, 19 are cut into pieces by applying pressure and heat, and the elasticity is removed in the non-stretchable region A1 while leaving the stretchability in the stretchable region A2.

FIG. 19(a) shows a case where the elastic members 15, 16, and 19 are cut at one point in the middle in the width direction, and a pressure section 171 having a cutting protrusion 172 at one point in the circumferential direction is cut on the outer periphery. The elastic member 15 is formed between the inner sheet layer 12H and the outer sheet layer 12S by a seal roll 170 whose cutting convex portion 172 is heated to a desired temperature and an anvil roll 180 with a smooth surface placed opposite thereto. The object to be cut to which ~ 17, 19 are attached is sandwiched so that the inner sheet layer 12H faces the seal roll side, and the elastic members 15, 16, 19 is cut by applying pressure and heating. In a product that has been processed in this way, as shown in FIG. 20(a), there is only a cut remaining portion between the outer sheet layer 12S and the inner sheet layer 12H that continues from the elastic members 15, 16, and 19 in the elastic region A2. will remain alone as the unnecessary elastic member 18 in a state contracted to its natural length.

Further, FIG. 19(b) shows a case in which almost the entire elastic members 15, 16, and 19 are finely cut. Elastic members 15 to 17, 19 are attached between the inner sheet layer 12H and the outer sheet layer 12S by a seal roll 170 in which 173 is heated to a desired temperature and an anvil roll 180 with a smooth surface disposed opposite thereto. The object to be cut is sandwiched so that the inner sheet layer 12H faces the seal roll side, and the elastic members 15, 16, 19 are pressurized and heated only at the portion sandwiched between the cutting convex portion 173 and the outer peripheral surface of the anvil roll 180. and then cut it. In a product subjected to such processing, as shown in FIG. 20(b), between the outer sheet layer 12S and the inner sheet layer 12H, there is a cut residue continuous from the elastic members 15, 16, 19 in the elastic region A2, The cut pieces of the elastic members that are not continuous with the elastic members 15, 16, and 19 in both elastic regions A2 remain as unnecessary elastic members 18 in a state where they have been contracted to their natural length.

The sheet material forming the inner sheet layer 12H and the outer sheet layer 12S can be used without particular limitation, but nonwoven fabric is preferred. When using a nonwoven fabric, it is preferable that the basis weight per sheet is about 10 to 30 g/m ² .

The elastic members 15 to 19 are fixed to the exterior bodies 12F and 12B with hot melt adhesive HM using various coating methods. It is preferable that the inner sheet layer 12H and the outer sheet layer 12S are joined with a hot melt adhesive HM for fixing the elastic members 15 to 19 at the portions having the elastic members 15 to 19, respectively. In the portions that do not have the adhesive, they may be bonded using a hot melt adhesive HM, or may be bonded by material welding such as heat sealing or ultrasonic sealing, or some or all of them may not be bonded. In the parts of the exterior bodies 12F and 12B in the illustrated example having the elastic members 15 to 19, hot melt adhesive HM is applied only to the outer circumferential surfaces of the elastic members 15 to 19 using a coating means such as a comb gun or a SureWrap nozzle, and the hot melt adhesive HM is applied between the sheet layers. By sandwiching the elastic members 15 to 19 between the sheets, only the hot melt adhesive HM applied to the outer peripheral surfaces of the elastic members 15 to 19 fixes the elastic members 15 to 19 to both sheet layers and fixes the two sheet layers together. The elastic members 15 to 19 may be fixed to both sheet layers only at both ends in the stretching direction in the stretchable region A2.

(High elongation area)
As shown in FIG. 13, at least the end on the crotch side of the lower waist elastic region A3 of the front body F is a high stretch region A4 extending toward the center in the width direction than the rising gathers 60, and the rising portion 68 and It is preferable that the gather elastic member 63 extends into the high elongation region A4 of the front body F toward the waist opening WO. As a result, the high stretch region A4 of the waist lower stretch region A3 exists so as to cross the hollow of the wearer's groin region, so that the exterior bodies 12F and 12B follow the expansion and contraction of the groove in the groin region and firmly fit into the inner body 200. can be imposed. Furthermore, if the rising portion 68 of the rising gathers 60 and the gather elastic member 63 extend to the portion pressed down by this high elongation region A4, the portion of the rising portion 68 that has the gather elastic member 63 will be pressed against the inguinal region. Using the high elongation area A4, which is firmly pressed against the patient, as a base, the user can rise up to enter the hollow of the groin area. Therefore, in this pants-type disposable wearing article, the fit to the inguinal region is significantly improved.

In particular, in pants-type disposable diapers with a two-part exterior type as shown in FIGS. 1 to 7, the fit around the legs inevitably deteriorates, and especially the fit around the groin area tends to deteriorate. In other words, when wearing a pant-type disposable diaper with a two-piece exterior, the distance from the crotch position of the inner body 200 to the intersection with the exterior bodies 12F and 12B is long, so the inner body 200 can be rotated from side to side using the intersection as a fulcrum. Since the interior body 200 is easily swayed, the interior body 200 can easily move laterally compared to a type that includes a continuous integral exterior body 12 from the front body F to the back body B. In addition, in the pant-type disposable diaper with a two-part exterior, the edges on the crotch side of the exterior bodies 12F and 12B have a straight line shape along the width direction WD or a shape close to it, and are perpendicular to or at right angles to the side edges of the interior body 200. intersect at close angles. These mean that pants-type disposable diapers with a two-part exterior tend to have insufficient fit for the groin area. Therefore, the formation of the high elongation region A4 and the positional relationship between the high elongation region A4 and the rising gathers 60 have great technical significance, especially when applied to such a pants-type disposable diaper with a two-part exterior. Become something. Furthermore, when the side flaps 70 and the side stretchable regions SG are provided as in the illustrated example, the side stretchable regions SG elastically support the lateral movement of the interior body 200, and the side stretchable regions SG cover the sides of the interior body 200. This is preferable because a gap is less likely to be formed on the side of the interior body 200.

The positional relationship between the high stretch region A4 and the rising gathers 60 can be determined as appropriate, but in normal cases, the width direction WD dimension of the non-stretch region A1 in the range of the front-rear direction LD including the high stretch region A4 is The dimension 56X in the width direction WD of the absorbent body 56 is less than 1/2 of the dimension 56 ) is 1.1 to 1.8 times (particularly 1.2 to 1.5 times), the positional relationship between the high elongation region 4 and the rising gathers 60 is appropriate, and the fit to the inguinal region is particularly good. Therefore, it is preferable.

The rising portion 68 of the rising gathers 60 and the gather elastic member 63 preferably extend to the waist side end of the high elongation region A4, but may extend only to the middle of the high elongation region A4 in the front-rear direction. In addition, the dimension in the front-rear direction LD of the overlapping portion of the high elongation region A4, the rise-up portion 68 of the rise -up gathers 60, and the gather elastic member 63 is the length in the front-rear direction LD of the region where the interior body 200 and the front body F overlap. It is preferably about 4 to 95%, particularly about 7 to 20%, of the dimension of.

The high stretch area A4 may be provided over the entire lower waist stretch area A3 in the front-rear direction as in the example shown in FIG. 13, but may be provided only in a portion as in the example shown in FIG.

For example, as shown in FIG. 17, the edge of the waist lower elastic area A3 on the non-elastic area A1 side is located on the center side in the width direction WD in stages or continuously as it goes from the waist opening WO side to the crotch side. The high stretch region A4 is preferably provided only on the crotch side of the waist lower stretch region A3. Groin depressions are more noticeable on the groin side and rarely occur on the waist side. Therefore, it is preferable to provide the high elongation region A4 only in the portion of the inguinal region where the depression tends to become deep, thereby improving the fit to the inguinal region while preventing contraction of the absorbent body 56 in other portions. In this case, the dimension of the high elongation region A4 in the longitudinal direction LD is preferably about 4 to 95%, particularly about 7 to 20%, of the dimension in the longitudinal direction LD of the region where the interior body 200 and the front body F overlap. . Moreover, when the waist lower elastic member 19 built into the high elongation region A4 is an elongated elastic member, it is preferable that the high elongation region A4 includes a plurality of waist lower elastic members 19. Furthermore, it is preferable that the edge of the portion of the waist lower stretchable region A3 other than the high stretchable region A4 on the non-stretchable region A1 side extends to the end of the absorbent core 56 in the width direction WD, as shown in the illustrated example. , may be located laterally than both side edges of the absorber 56. In the latter case, the edge of the non-elastic region A1 side of the lower waist elastic region A3 other than the high stretch region A4 is located laterally than the side edge of the side flap 70, even if it is located on the side flap 70. It may be located.

As can be seen from this example, the edge of the lower waist elastic region A3 on the non-stretchable region A1 side, the edge of the high stretch region A4 on the non-stretchable region A1 side, and the edge of the non-stretchable region A1 side of the region other than the high stretch region A4. The edges may be curved, stepped, or straight along the front-rear direction LD.

In order to maintain the front-rear elasticity balance, a high elasticity area A4 can also be provided in the lower waist elasticity area A3 of the back body B, as shown in FIGS. 14, 16, and 18. In this case, as can be seen from the combination examples shown in FIGS. 13 and 14, the combination examples shown in FIGS. 15 and 16, and the combination examples shown in FIGS. 17 and 18, the height of the front body F and the back body B is It is particularly preferable that the lengthwise positions of the stretching regions A4 coincide. In the case where the high stretch region A4 is provided in the lower waist stretch region A3 of the back body B, the rising portion 68 and the gathered elastic member 63 do not have to reach into the high stretch region A4 of the back body B as in the illustrated example. , may reach the same length as the front body F. Further, although not shown, the high stretch region A4 may be provided only in the waist lower stretch region A3 of the front body F, and the high stretch region A4 may not be provided in the waist lower stretch region A3 of the back body B.

(Internal and external joints)
The interior body 200 can be fixed to the exterior bodies 12F, 12B by joining means such as heat sealing or ultrasonic sealing by material welding, or by hot melt adhesive. In the illustrated example, the hot melt adhesive applied to the back surface of the interior body 200, that is, the back surface of the liquid-impermeable sheet 11 in this case, and the base portion 65 of the rising gathers 60 is applied to the inner surfaces of the exterior bodies 12F and 12B. Fixed. As shown in FIGS. 13 and 14, the inner and outer joints 201 and 202 that fix the interior body 200 and the exterior bodies 12F and 12B can be provided in almost the entire area where the two overlap, for example, the interior body 200 It can also be provided in a portion other than both ends in the width direction.

In addition, as in the example shown in FIGS. 17 and 18, in the range of the front-rear direction LD having the waist lower elastic region A3, the inner and outer joints 201 and 202 are located on the non-elastic region A1 side of one waist lower elastic region A3. It is also preferable that it is provided only in the range from the end to the end of the other waist lower elastic area A3 on the non-elastic area A1 side. In this way, it is preferable to limit the width of the inner and outer joint portions 201 and 202 to the same extent as the width of the non-stretchable region A1, since unnecessary contraction of the absorbent body 56 can be suppressed. Here, if the width of the inner and outer joints 201 and 202 is simply narrowed, the interior body 200 will tend to move laterally, and the fit in the inguinal region will tend to deteriorate. However, this pants-type disposable diaper has excellent fit to the groin area due to the formation of the high elongation area A4 and the positional relationship between the high elongation area A4 and the rising gathers 60, so the fit to the groin area is excellent. The contradictory effects of improving the temperature and suppressing unnecessary shrinkage of the absorber 56 are compatible. In particular, it is preferable to have the above-mentioned side elastic regions SG, since this can further compensate for the deterioration in fit in the inguinal region.

The inner and outer joints 201 and 202 may be located only within the non-elastic area A1, but from the end of one waist lower elastic area A3 on the non-elastic area A1 side to the non-elastic area A3 of the other waist lower elastic area A3. It is preferable that it is provided over the end portion on the stretchable region A1 side. In the latter case, for example, as shown in the illustrated example, the edge of the non-stretchable region A1 side of the waist lower elastic region A3 is gradually or continuously moved toward the center of the width direction WD from the waist opening WO side toward the crotch side. When extending to the side, the positions of the side edges of the inner and outer joints 201 and 202 in the width direction WD similarly change from the waist opening WO side toward the crotch side.

The dimensions in the width direction WD of the inner and outer joint portions 201 and 202 can be determined as appropriate, but usually can be set to about 75 to 95% of the dimension in the width direction WD of the non-stretchable region A1.

As in the example shown in FIGS. 15 and 16, the inner and outer joining parts 201 and 202 can have an appropriate shape regardless of the position of the side edge of the waist lower elastic area A3 on the non-elastic area A1 side. Therefore, for example, like the front body F in the illustrated example, the inner and outer joint parts 201 and 202 can have a constricted shape in which the width at the middle part is narrower than the width at both ends in the front-rear direction LD. Further, as in the illustrated example of the back body B, the inner and outer joint parts 201 and 202 can also be formed into a T-shape in which the width on the crotch side is narrower than the width on the waist opening WO side.

(Cover non-woven fabric)
In a pant-type disposable diaper with a two-part exterior, the interior body 200 is exposed between the front exterior body 12F and the rear exterior body 12B, so that the liquid-impermeable sheet 11 is not exposed on the back surface of the interior body 200. It is preferable that the back surface of the interior body 200 is provided with a cover nonwoven fabric 13 extending from between the front exterior body 12F and the interior body 200 to between the rear exterior body 12B and the interior body 200. The inner and outer surfaces of the cover nonwoven fabric 13 can be adhered to opposing surfaces, respectively, via a hot melt adhesive. The nonwoven fabric used for the cover nonwoven fabric 13 can be appropriately selected from, for example, the same material as the material of the exterior bodies 12F and 12B.

(Nonwoven fabric)
As the nonwoven fabric in the above description, any known nonwoven fabric can be used as appropriate depending on the site and purpose. The constituent fibers of the nonwoven fabric include, for example, olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based fibers, and polyamide-based fibers (including single-component fibers as well as composite fibers such as core-sheath fibers), as well as recycled fibers such as rayon and cupro. Fibers, natural fibers such as cotton, etc. can be selected without particular limitation, and a mixture of these can also be used. In order to increase the flexibility of the nonwoven fabric, it is preferable that the constituent fibers be crimped fibers. In addition, even if the constituent fibers of a nonwoven fabric are hydrophilic fibers (including those made hydrophilic by a hydrophilizing agent), they may be hydrophobic fibers or water-repellent fibers (water-repellent fibers made water-repellent by a water-repellent agent). ). In addition, nonwoven fabrics generally vary depending on the fiber length, sheet forming method, fiber binding method, and laminated structure. It is classified into nonwoven fabrics, point bonded nonwoven fabrics, laminated nonwoven fabrics (SMS nonwoven fabrics with a meltblown layer sandwiched between spunbond layers, SMMS nonwoven fabrics, etc.), and any of these nonwoven fabrics can be used.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

・"Anteroposterior direction" means the direction indicated by the symbol LD in the figure (vertical direction), and "width direction" means the direction indicated by WD in the figure (horizontal direction), and the longitudinal direction and the width direction are orthogonal.

・"Front side" means the side closest to the wearer's skin when wearing a pants-type disposable diaper, and "backside" means the side far from the wearer's skin when wearing a pants-type disposable diaper. .

・"Front side" means the side of the component that is closest to the wearer's skin when wearing a pants-type disposable diaper, and "back side" means the side that is closer to the wearer's skin when wearing a pants-type disposable diaper. It means the far side.

- "Elongation rate" means a value when the natural length is 100%. For example, an extension ratio of 200% is synonymous with an extension ratio of 2 times.

- "Gel strength" is measured as follows. Artificial urine (urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion exchange water: 97.09 wt%) Add 1.0 g of superabsorbent polymer to 49.0 g of the mixture) and stir with a stirrer. The generated gel was left in a constant temperature and humidity chamber at 40° C. x 60% RH for 3 hours, then returned to room temperature, and the gel strength was measured using a card meter (Curdmeter-MAX ME-500, manufactured by I.techno Engineering).

・“Basic weight” is measured as follows. After pre-drying the sample or test piece, it is left in a test room or apparatus under standard conditions (test location: temperature 23±1°C, relative humidity 50±2%) to reach a constant weight. Pre-drying refers to making the sample or test piece constant weight in an environment at a temperature of 100°C. Note that fibers with an official moisture content of 0.0% do not need to be pre-dried. From the test piece that has reached a constant weight, use a sample sampling template (100 mm x 100 mm) to cut out a sample with dimensions of 100 mm x 100 mm. Measure the weight of the sample, multiply by 100 to calculate the weight per square meter, and use it as the basis weight.

- "Thickness" is automatically measured using an automatic thickness measuring device (KES-G5 Handy Compression Measurement Program) under the conditions of load: 0.098 N/cm ² and pressurized area: 2 cm ² .

- Water absorption is measured according to JIS K7223-1996 "Water absorption test method for super absorbent resin".

・Water absorption rate is the "time to end point" when JIS K7224-1996 "Water absorption rate test method for super absorbent resin" is performed using 2 g of super absorbent polymer and 50 g of physiological saline. .

- "Unfolded state" means a state in which it is flattened without shrinkage or slack.

- Unless otherwise specified, the dimensions of each part refer to the dimensions in the unfolded state, not in the natural length state.

- If there is no description of the environmental conditions for the test or measurement, the test or measurement shall be conducted in a test room or equipment under standard conditions (test location: temperature 23 ± 1°C, relative humidity 50 ± 2%). do.

The present invention can be used in general pants-type disposable wearing articles such as shorts-type sanitary napkins as well as pants-type disposable diapers as in the above example.

DESCRIPTION OF SYMBOLS 11...Liquid-impermeable sheet, 12A...Side seal part, 12B...Rear exterior body, 12E...Waist extension part, 12F...Front exterior body, 12F, 12B...Exterior body, 12H...Inner sheet layer, 12S...Outer sheet Layer, 13... Cover nonwoven fabric, 15, 19... Waist lower elastic member, 16... Cover portion elastic member, 17... Waist elastic member, 18... Unnecessary elastic member, 200... Interior body, 201, 202... Inner/outer joint portion, 30... Top sheet, 40... Intermediate sheet, 50... Absorbent element, 56... Absorber, 58... Packaging sheet, 60... Rising gathers, 60A... Tip side portion, 60B... Root side portion, 62... Gathered sheet, 63... Gathered elastic member , 67...Lodging part, 68...Rising part, A1...Non-stretchable area, A2...Stretchable area, A3...Waist lower elastic area, C...Buttock cover part, L...Intermediate area, LD...Anteroposterior direction, SG...Side elastic area , T... Waist circumference area, U... Lower waist part, W... Waist part, WD... Width direction, WO... Waist opening, LO... Leg opening, P1... First part, P2... Second part, HM... Hot melt adhesive agent, 70... side flap, 71... first sheet layer, 72... second sheet layer, 73... side elastic member, 74... innermost sheet layer, 75... outermost sheet layer, 76... inner sheet layer, 77 ...Non-joint portion, 79...Special sheet material, F...Front body, A4...High elongation area, B...Back body.

Claims (5)

A front exterior body and a rear exterior body provided separately on the front body and the back body,
an interior body including an absorbent body, which extends in the front-rear direction from the front exterior body to the rear exterior body, and is joined to the front exterior body and the rear exterior body, respectively;
a side seal portion in which both sides of the front exterior body and both sides of the rear exterior body are respectively joined;
Equipped with a waist opening and a pair of left and right leg openings,
The front exterior body and the rear exterior body are separated from each other in the front-rear direction on the crotch side,
The front exterior body and the rear exterior body are divided into a non-stretchable region provided in the center in the width direction, and a non-stretchable region on both sides in the width direction, in a range in the front and back direction including the side seal portion and the absorbent body. It has an elastic region below the waist,
The lower waist elastic region includes a lower waist elastic member, is contracted in the width direction together with the waist lower elastic member, and is expandable in the width direction together with the waist lower elastic member,
Rising gathers are provided on both sides of the interior body, respectively;
The rising gathers include a root portion fixed to both sides of the back surface of the interior body, a main body portion extending from the root portion to both sides of the front surface of the interior body through the sides of the interior body, and the main body. A collapsed portion formed by fixing the front and rear ends of the portion to the surface of the interior body in a collapsed state, an unfixed raised portion located between the front and rear collapsed portions, and at least the tip of this raised portion. a gathered elastic member provided along the front-rear direction in the part;
The main body portion has a root side portion extending toward the center side in the width direction, and a tip side portion that is folded back at the tip of the root side portion and extends outward in the width direction,
The rising portion contracts in the front-rear direction together with the gather elastic member and rises from the surface of the interior body, and is expandable in the front-rear direction together with the gather elastic member.
In pants-type disposable wearing articles;
The edge of the lower waist elastic region of the front exterior body on the non-elastic region side extends stepwise or continuously from the waist opening side toward the crotch side so as to be located at the center side in the width direction. ,
The lower waist elastic region of the front exterior body is adjacent to a high elongation region provided on the crotch side and extending toward the center in the width direction than the rising gathers, and on the waist opening side of the high elongation region, and It consists of an area that does not extend toward the center in the width direction than the rising gathers,
The widthwise dimension of the non-stretchable region in the front-rear direction range having the high stretchable region is less than 1/2 of the widthwise dimension of the absorbent body,
The longitudinal dimension of the high elongation region in the lower waist elastic region of the front exterior body is 7 to 20% of the longitudinal dimension of the region where the interior body and the front body overlap,
A boundary between the high stretch region and other regions in the lower waist stretch region of the front exterior body is located at a position that overlaps with the middle of the collapsed portion in the front-rear direction,
The rising portion and the gathered elastic member extend toward the waist opening side into the high elongation region of the front exterior body.
A pants-type disposable wearing article characterized by: The widthwise dimension of the absorbent body is 1.1 to 1.8 times the interval between the rising gathers on both sides.
The pants-type disposable wearing article according to claim 1. The inner/outer joint portion that joins the interior body and the front exterior body is provided over the entire region where the interior body and the front exterior body overlap, excluding both widthwise ends of the interior body. There is,
The pants-type disposable wearing article according to claim 1 or 2. In the range in the front-rear direction that includes the waist-lower elastic region, the inner-outer joint portion that joins the inner body and the front exterior body extends from the end of one of the waist-lower elastic regions on the non-stretchable region side to the other end of the waist-lower elastic region. It is provided only in the range up to the end of the non-stretchable region in the waist lower elastic region, and the side edge of the inner-outer joint portion is gradually or continuously formed as it goes from the waist opening side to the crotch side. , extending so as to be located at the center side in the width direction,
The pants-type disposable wearing article according to claim 1 or 2. On both sides of the interior body, side flaps extending laterally beyond the rising gathers extend in the front-rear direction from the front exterior body to the rear exterior body,
The side flap has a side elastic region that elastically expands and contracts in the front-rear direction,
The side elastic region includes a side elastic member, is contracted in the front-rear direction together with the side elastic member, and is expandable in the front-rear direction together with the side elastic member,
The side stretchable region extends toward the waist opening side into the high stretchable region of the front exterior body.
The pants-type disposable wearing article according to claim 4.

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