JP7236833B2 - absorbent article - Google Patents

Description

The present invention relates to pants-type diapers, tape-type diapers, pad-type diapers, and disposable absorbent articles such as sanitary napkins.

The absorbent article includes a top sheet forming a surface and an absorbent body provided on the back side of the top sheet. It is based on absorption and retention by the body. The absorbent body is generally made by stacking a mixture of pulp fibers and superabsorbent polymer particles, and has a substantially hourglass shape with a constricted part formed in the middle in the front-rear direction in order to improve the fit to the crotch part. are widely used. In addition, the absorbent body is generally wrapped in a wrapping sheet made of crepe paper, non-woven fabric, or the like for the purpose of preventing deformation of the absorbent body and leakage of the superabsorbent polymer particles.

On the other hand, the demand for thin absorbent bodies for the purpose of improving flexibility and fitting properties is still one of the important issues. For this reason, in order to improve the flexibility and fit of the absorbent body, or for other purposes, it has been proposed to form unevenness on the absorbent body by embossing (see Patent Literatures 1 and 2).

Japanese Patent Application Laid-Open No. 2004-16648 Japanese Patent Publication No. 2014-510589

However, in order to reduce the thickness of an absorbent body in which short fiber-like absorbent materials such as pulp fibers are stacked, there is no other choice but to reduce the amount of fibers. has a problem that it is likely to occur.
Moreover, if a large number of embossed recesses are formed at intervals by embossing in order to improve flexibility and fit over the entire absorbent body, flexibility is improved but rigidity is reduced. In particular, when the absorber is provided with a constricted portion as described above, the edge of the constricted portion is separated from the side edge of the packaging sheet, so the shape of the constricted portion tends to collapse.

Therefore, the main object of the present invention is to make it difficult for the shape of the constricted portion to collapse while having embossed recesses in an absorbent body having a constricted portion.

The invention that solves the above problems is as follows.
<Invention according to claim 1>
Having an absorbent element provided in a range including the crotch part,
The absorbent element includes an absorbent body in which at least short-fiber absorbent materials are stacked, and a packaging sheet that wraps the absorbent body,
The packaging sheet has a first portion covering the front side of the absorbent body and a second portion covering the back side of the absorbent body,
The absorbent body has a constricted portion in the middle in the front-rear direction,
the first portion and the second portion are adhered along the edge of the constricted portion;
embossed depressions extending from the first portion to at least a middle portion in the thickness direction of the absorbent body are arranged at intervals in a range including at least a portion of the absorbent element that overlaps with the constricted portion of the absorbent body;
An absorbent article characterized by:

(Effect)
The absorbent body of this absorbent article has a constricted portion, and the first portion and the second portion are adhered along the edge of this constricted portion. Therefore, even if the shape of the absorbent element is repeatedly changed, the absorbent body is less likely to be twisted or cracked, and the constricted portion is less likely to lose its shape.
In particular, in this absorbent article, the embossed recesses extending from the first portion to at least the middle of the absorbent body in the thickness direction are arranged at intervals in the range including the portion overlapping the constricted portion. Therefore, the flexibility and fit of the constricted portion are improved. In this case, the formation of the embossed depressions reduces the rigidity of the absorbent body, but the first part and the second part of the packaging sheet are firmly adhered along the constricted part, and the side edges of the constricted part are pressed, so that the constriction does not occur. It has an effect that the shape of the part is difficult to collapse.

<Invention according to claim 2>
The absorber is made by stacking a mixture of short fiber pulp fibers and superabsorbent polymer particles,
The total basis weight of the pulp fibers and the superabsorbent polymer particles is 250 to 500 g/m ² , the weight ratio of the superabsorbent polymer particles to the pulp fibers is 50 to 300%, and the thickness is 2.5 to 5.5 mm. is
The absorbent article according to claim 1.

(Effect)
In the case of such an absorbent body having a small amount of fibers and a high content ratio of superabsorbent polymer particles, the shape of the constricted portion is particularly likely to be deformed. Therefore, when having such an absorbent body, the structure in which the first portion and the second portion of the packaging sheet are adhered along the constricted portion is particularly significant.

<Invention according to claim 3>
The first part and the second part are directly bonded in the embossed recess,
The absorbent article according to claim 1 or 2.

(Effect)
Since the first portion and the second portion are directly bonded in the embossed recesses, the shape of the embossed recesses does not easily collapse. It also has the effect of improving the flexibility and fit of the absorbent element. On the other hand, in the case of having such embossed concave portions, the absorbent body is divided in places, so that the shape of the constricted portion is particularly likely to be deformed. Therefore, when having such an absorbent body, the structure in which the first portion and the second portion of the packaging sheet are adhered along the constricted portion is particularly significant.

<Invention according to claim 4>
The packaging sheet is made of a nonwoven fabric of thermoplastic resin fibers,
The bonding of the first portion and the second portion along the edge of the constricted portion and the bonding of the first portion and the second portion in the embossed recess are performed by welding the first portion and the second portion. ,
The absorbent article according to claim 3.

(Effect)
The packaging sheet is made of a non-woven fabric of thermoplastic resin fibers, and the edge of the constricted portion and the embossed recess are welded by the first portion and the second portion, so that they are firmly adhered. Therefore, the shape of the absorbing element is more difficult to collapse.

<Invention according to claim 5>
The embossed depressions are arranged in a zigzag pattern,
The absorbent article according to any one of claims 1 to 4.

(Effect)
If the concave portions are arranged in a continuous straight line, the excreted fluid will concentrate in the concave portions. However, when the concave portions are arranged in a zigzag pattern, it has the effect of making it difficult for the excreted liquid to concentrate only in specific concave portions. In addition, the effect of improving the flexibility of the absorbent body due to the embossed recesses is less directional (that is, the flexibility in various directions is improved), and the fit is improved.

<Invention according to claim 6>
A method for manufacturing an absorbent article according to claim 1,
After bonding the first portion and the second portion along the edge of the constricted portion,
forming an embossed concave portion extending from the first portion to at least a middle portion in a thickness direction of the absorbent body in a range including at least a portion of the absorbent element overlapping with the constricted portion of the absorbent body;
A method for manufacturing an absorbent article characterized by:

(Effect)
Also when forming the embossed recesses, there is a risk that the shape of the constricted portion of the absorber may be lost. On the other hand, as in this manufacturing method, if the first part and the second part of the packaging sheet are first adhered along the edge of the constricted part and then the embossed recess is formed, the embossed recess is formed. It is possible to prevent the shape of the constricted portion from collapsing. Further, according to this manufacturing method, it is possible to manufacture an absorbent article having embossed concave portions and an absorbent body in which the shape of the constricted portion does not easily collapse.

According to the present invention, it is possible to provide an absorbent article having an absorbent body in which the shape of the constricted portion does not easily collapse while having embossed recesses.

Fig. 2 is a plan view showing the surface of the tape-type disposable diaper when the diaper is unfolded; Fig. 2 is a plan view showing the back surface of the tape-type disposable diaper in a state in which the diaper is unfolded; 6 is a cross-sectional view taken along line 6-6 of FIG. 1; FIG. FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. 1; FIG. 2 is a cross-sectional view taken along line 8-8 of FIG. 1; 2 is a cross-sectional view taken along line 9-9 of FIG. 1; FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 1; FIG. It is explanatory drawing of provision of an embossed recessed part. It is explanatory drawing of provision of an adhesion part. Fig. 2 is a plan view of an absorbent element; It is sectional drawing of an embossed recessed part. It is explanatory drawing which shows an example of the provision process of an adhesion part and an embossed recessed part. Fig. 10 is a plan view of an absorbent element of another embodiment; Fig. 10 is a plan view of an absorbent element of another embodiment; It is explanatory drawing of the adhesion|attachment part of another embodiment, and provision of an embossed recessed part. FIG. 10 is an explanatory diagram of the vicinity of the protruding portion of the roller; It is explanatory drawing of the protrusion part vicinity of the roller of another embodiment. Fig. 10 is a plan view of an absorbent element of another embodiment; FIG. 11 is a cross-sectional view of an embossed recess in another embodiment; It is an enlarged view of an embossed recessed part.

1 to 7 show an example of a tape-type disposable diaper, where X in the figures indicates the total width of the diaper excluding the connecting tape, and L indicates the total length of the diaper. Each component can be joined to adjacent members in place. The dotted pattern portion in the cross-sectional view indicates the adhesive as this joining means. Bonding between members with an adhesive can be achieved, for example, by solid, bead, curtain, summit or spiral application of hot-melt adhesive, pattern coating (transfer of hot-melt adhesive by letterpress method), etc., or fixed portions of elastic members. can be applied to the outer peripheral surface of the elastic member instead of or together with this, such as comb gun or Surewrap application. Hot-melt adhesives include, for example, EVA-based, adhesive rubber-based (elastomer-based), olefin-based, and polyester/polyamide-based types, and they can be used without particular limitation (however, the adhesive may excluding cellulose nanofibers). As a joining means for joining each constituent member, a means by material welding such as heat sealing or ultrasonic sealing can be used.

This tape-type disposable diaper comprises an absorbent body 56, a liquid-permeable top sheet 30 covering the front side of the absorbent body 56, a liquid-impermeable resin film 11 covering the back side of the absorbent body 56, and a liquid-impermeable resin film. It has an exterior nonwoven fabric 12 that covers the back side of the product and constitutes the back side of the product. Symbol F indicates a ventral portion located forward of the center in the front-rear direction, and symbol B represents a dorsal portion located rearward of the center in the front-rear direction.

The materials and characteristic parts of each part will be described in order below.
(Absorber)
The absorbent body 56 is a part that contains a superabsorbent polymer and absorbs and retains bodily fluids such as excretions and blood. As the absorber 56, a known structure such as a structure in which a superabsorbent polymer is held by an aggregate of fibers, a structure in which a superabsorbent polymer is sandwiched between liquid-permeable sheets, or the like is appropriately adopted. be able to. As the fiber assembly, a product obtained by laminating short fibers such as cotton pulp and synthetic fibers can be used. The fabric weight can be, for example, about 100 to 300 g/m ² . The synthetic fiber has a fineness of, for example, 1 to 16 dtex, preferably 1 to 10 dtex, more preferably 1 to 5 dtex. The degree of crimping of the crimped fibers can be, for example, about 5 to 75, preferably 10 to 50, more preferably 15 to 50 per 2.54 cm. Further, uniformly crimped crimped fibers can be used.
The absorber can be molded into various shapes such as a substantially rectangular shape, a substantially hourglass shape, a substantially trapezoidal shape, and other shapes.

(superabsorbent polymer particles)
Although the shape of the superabsorbent polymer contained in the absorbent body 56 is not particularly limited, it is preferably particulate. Superabsorbent polymer particles include "powder" in addition to "particles". As the superabsorbent polymer particles 54, those used in this type of absorbent article can be used as they are. Although the particle size of the superabsorbent polymer particles is not particularly limited, for example, sieving using a 500 μm standard sieve (JIS Z8801-1: 2006) (shaking for 5 minutes), and particles falling under the sieve in this sieving When sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006), the percentage of particles remaining on the 500 μm standard sieve is 30% by weight or less, and the 180 μm standard sieve It is desirable that the proportion of particles remaining on the top is 60% by weight or more. The superabsorbent polymer contained in the absorbent body 56 may be wholly movable, or partly or wholly fixed to another material such as the fiber assembly described above or the packaging sheet 58 described later. may

Materials for the superabsorbent polymer are not particularly limited, but those having a water absorption of 30 g/g or more are suitable. Superabsorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based particles. and acrylic acid (salt) polymers can be used. As for the shape of the superabsorbent polymer particles, the powder particles that are commonly used are suitable, 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 reversion.

As the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. As a result, even when the absorbent body 56 is bulky, it is possible to effectively suppress the feeling of stickiness after liquid absorption.

The basis weight of the superabsorbent polymer can be appropriately determined according to the absorption amount required for the use of the absorbent body 56 . Therefore, although it cannot be generalized, it can be 50 to 350 g/m ² . If the basis weight of the polymer is less than 50 g/m ² , it becomes difficult to secure the absorption capacity. If the amount exceeds 350 g/m ² , not only the effect is saturated, but also the excessive superabsorbent polymer particles give a gritty feeling of discomfort.

In the absorbent body 56 containing superabsorbent polymer particles, when the superabsorbent polymer particles absorb the excreted fluid and expand, the liquid passages in the absorbent body shrink. "Gel blocking" that reduces the diffusibility of the gel is likely to occur. In general, gel blocking is likely to occur in a site where excreted fluid is likely to concentrate, that is, in the crotch area or in the vicinity thereof, and when gel blocking occurs, the rate of absorption decreases, and it is believed that reversion is likely to occur. .

(packaging sheet)
In order to prevent the superabsorbent polymer particles from slipping out or to improve the shape retention of the absorbent body 56, the absorbent body 56 can be incorporated as an absorbent element 50 wrapped with a wrapping sheet 58. FIG. As the wrapping sheet 58, tissue paper, especially crepe paper, nonwoven fabric, poly-laminated nonwoven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the sheet is such that the superabsorbent polymer particles do not escape. When non-woven fabric is used instead of crepe paper, hydrophilic SMMS (spunbond/meltblown/meltblown/spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene/polypropylene, etc. can be used as the material. The fiber basis weight is preferably 5 to 40 g/m ² , particularly 10 to 30 g/m ² . Moreover, when using a nonwoven fabric, the nonwoven fabric which consists of at least one of a thermoplastic resin fiber and a non-thermoplastic resin fiber can be used.

As shown in FIG. 3, the packaging sheet 58 may be configured to wrap the entire absorber 56 with one sheet, or may wrap the entire absorber 56 with a plurality of sheets, such as two upper and lower sheets.

(top sheet)
The top sheet 30 is liquid-permeable, and may be, for example, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like. In addition, among these, the nonwoven fabric is not particularly limited as to what the raw material fibers are. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters, and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of these. etc. can be exemplified. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of processing methods include known methods such as spunlace, spunbond, thermal bond, meltblown, needle punch, air through, and point bond methods. For example, if flexibility and drapeability are desired, the spunlace method is preferable, and if bulkiness and softness are desired, the thermal bond method is the preferable processing method.

The top sheet 30 extends from the front end to the rear end of the product in the front-rear direction, and extends laterally from the absorbent body 56 in the width direction WD. If necessary, such as when the top sheet 30 is located on the center side in the width direction, the width of the top sheet 30 may be made shorter than the total width of the absorbent body 56, and other suitable modifications may be made.

(intermediate sheet)
In this tape-type disposable diaper, an intermediate sheet (also called a "second sheet") 40 is provided in order to prevent the aforementioned "backflow" phenomenon.

Examples of the intermediate sheet 40 include materials similar to those of the top sheet 30, spunlace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, mixed sheet of pulp and rayon, pointbond nonwoven fabric, and crepe paper. In particular, an air-through nonwoven fabric is preferred because it is bulky. Composite fibers having a core-sheath structure are preferably used for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. The basis weight is preferably 17-80 g/m ² , more preferably 25-60 g/m ² . The fineness of the constituent fibers of the nonwoven fabric is preferably 2.0 to 10 dtex, more preferably 1.7 to 5 dtex. In addition, long fibers and short fibers can be used for the fibers constituting the nonwoven fabric. In particular, short fibers can be used, and the fiber length is preferably 35 to 60 mm, preferably 40 to 55 mm. In order to make the non-woven fabric bulky, it is preferable to use eccentric fibers, hollow fibers, or eccentric and hollow fibers whose core is not in the center as mixed fibers of all or part of the raw material fibers. In particular, the intermediate sheet made of short fiber nonwoven fabric preferably has a basis weight of 20 to 50 g/m ² .

As the non-woven fabric of the intermediate sheet 40, a non-woven fabric of raw fibers having higher hydrophilicity than the non-woven fabric of the top sheet 30 may be used, or the same material as the top sheet 30 may be added with a hydrophilizing agent. The raw material fibers of the nonwoven fabric used for the intermediate sheet 40 are not particularly limited, but synthetic fibers such as olefin-based fibers such as polyethylene and polypropylene, polyester-based fibers, and polyamide-based fibers can be used. As a method for processing the nonwoven fabric forming the intermediate sheet 40, any known method such as a spunlace method, a spunbond method, a thermal bond method, a meltblown method, a needle punch method, an air through method, a point bond method, or the like can be used. However, the use of the air-through method with bulkiness is particularly preferred.

The Clark stiffness (JIS P 8143 (2009)) of the nonwoven fabric forming the intermediate sheet 40 is 30 to 80, particularly 30 to 60, preferably lower than that of the top sheet 30 . If the stiffness is higher than 80, the softness of the intermediate sheet 40 of the worn article is impaired, and if it is lower than 30, the required thickness of the intermediate sheet 40 is impaired.

The middle sheet 40 has the same width as the top sheet 30, but may be shorter than the width of the absorbent element 50 and only centrally located. The length of the intermediate sheet 40 in the front-rear direction may be the same as the full length of the diaper, the length of the absorbent element 50, or within a short length range centered on the liquid-receiving area.

Intermediate sheet 40 is preferably joined to top sheet 30 . As a joining method, a known method such as adhesion using a hot-melt adhesive, spun lace, heat embossing, ultrasonic welding, or the like can be used. In particular, the use of heat embossing is preferable because the top sheet 30 becomes uneven and the diffusion of the liquid increases. In the uneven top sheet 30, a large number of concave portions are formed on the intermediate sheet 40 side. As a result, it becomes difficult for the liquid to permeate the intermediate sheet 40 only at a specific portion of the top sheet 30, and the liquid is diffused into a large number of concave portions and easily permeated.
When heat embossing is used as the joining means, the intermediate sheet 40 preferably has a melting point similar to that of the top sheet 30 . Although it is preferable that the top sheet 30 and the intermediate sheet 40 are joined in all the concave portions, there may be portions that are not joined.

(liquid-impermeable resin film)
The liquid-impermeable resin film 11 is not particularly limited as long as it has moisture permeability. Alternatively, a microporous sheet obtained by biaxially stretching can be preferably used. In particular, the liquid-impermeable resin film 11 can be one having moisture permeability in the thickness direction. Needless to say, the liquid-impermeable resin film 11 is made of a non-woven fabric as a base material with improved waterproofness. does not include

The liquid-impermeable resin film 11 preferably extends in the same or wider range than the absorbent body 56 in the front-rear direction LD and the width direction WD. , the end portions of the absorber 56 may not be covered in the front-rear direction LD and the width direction WD.

(exterior non-woven fabric)
The exterior non-woven fabric 12 covers the entire back side of the liquid-impermeable resin film 11 to give the back side of the product a cloth-like appearance. The exterior nonwoven fabric 12 is not particularly limited, and examples of raw material fibers include olefin-based, polyester-based, and polyamide-based synthetic fibers such as polyethylene or polypropylene, regenerated fibers such as rayon and cupra, and natural fibers such as cotton. A spunlace method, a spunbond method, a thermal bond method, an air through method, a needle punch method, or the like can be used as a processing method. However, spunbond nonwoven fabrics, SMS nonwoven fabrics, SMMS nonwoven fabrics, and other long-fiber nonwoven fabrics are suitable because they can achieve both good texture and strength. The non-woven fabric can be used singly or in multiple layers. In the latter case, it is preferable to bond the nonwoven fabrics together with a hot-melt adhesive or the like. When non-woven fabric is used, its fiber basis weight is preferably 10 to 50 g/m ² , particularly 15 to 30 g/m ² .

(Getting up gathers)
On both sides of the top sheet 30 in the width direction WD, rise gathers 60 standing up toward the wearer's skin are provided in order to prevent excrement from moving laterally along the top sheet 30 and prevent so-called side leakage. preferably. Of course, the rising gathers 60 can be omitted.

When adopting the rising gathers 60, the structure is not particularly limited, and any known structure can be adopted. The illustrated rising gathers 60 are composed of a gathering sheet 62 substantially continuous in the width direction WD, and an elongated gathering elastic member 63 fixed to the gathering sheet 62 in a stretched state along the front-rear direction LD. ing. As the gather sheet 62, a water-repellent nonwoven fabric can be used, and as the gather elastic member 63, thread rubber or the like can be used. The elastic member may be provided in a plurality of pieces as shown in FIGS. 1 and 2, or may be provided in a single piece.

The surface of the gather sheet 62 has a joining start end in the width direction WD on the side of the top sheet 30, and the portion on the back side in the width direction from this joining start end is the surface of each side flap portion SF, that is, liquid impermeable in the illustrated example. It is bonded to the side of the flexible resin film 11 and the side of the exterior nonwoven fabric 12 located on the back side in the width direction with a hot-melt adhesive or the like.

Around the legs, the front side in the width direction from the joining start end of the rising gathers 60 is fixed on the top sheet 30 at both ends in the front and back direction of the product, but the portion in between is a non-fixed free portion. It rises due to the contractile force of the elastic member 63 and comes to adhere to the surface of the body.

(end flap part, side flap part)
The illustrated tape-type disposable diaper has a pair of end flap portions EF without the absorbent body 56 extending to the front side and the rear side of the absorbent body 56, and extending laterally from both side edges of the absorbent body 56, respectively. and a pair of side flap portions SF that do not have the absorber 56. As shown in FIG.

(flat gather)
A side elastic member 64 made of an elongated elastic member such as rubber thread is fixed to each side flap portion SF while being stretched along the front-rear direction LD. is constructed as a planar gather. The leg elastic member 64 is provided between the gather sheet 62 and the liquid-impermeable resin film 11 on the widthwise back side of the joining portion of the gather sheet 62 in the vicinity of the joining start end, as shown in the illustrated example, and also includes side flaps. It can also be provided between the liquid-impermeable resin film 11 and the exterior nonwoven fabric 12 in the part SF. A plurality of leg-surrounding elastic members 64 may be provided on each side as in the illustrated example, or only one leg-surrounding elastic member 64 may be provided on each side.

(connecting tape)
The side flap portions SF of the dorsal portion B are provided with connecting tapes 13 that are detachably connected to the back surface of the ventral portion F, respectively. When wearing the diaper 10, the connecting tape 13 is wrapped around the back of the abdominal portion F from both sides of the waist, and the connecting portions 13A of the connecting tape 13 are connected to the back of the abdominal portion F at appropriate locations.

Although the structure of the connecting tape 13 is not particularly limited, in the illustrated example, a tape mounting portion 13C fixed to the side flap portion SF, a sheet base material forming a tape body portion 13B projecting from the tape mounting portion 13C, and the sheet It has a connecting portion 13A for the ventral side, which is provided in the middle portion in the width direction of the tape body portion 13B in the base material, and the leading end side of the connecting portion 13A serves as a knob portion.

As the connection portion 13A, a hook member (male member) of a mechanical fastener (surface fastener) may be provided, or an adhesive layer may be provided. The hook material has a large number of engaging projections on its connection surface, and the shapes of the engaging projections are (A) square-shaped, (B) J-shaped, (C) mushroom-shaped, and (D). Although there are a T shape, (E) a double J shape (a shape in which two J shapes are joined back to back), and the like, any shape may be used.

Further, as the sheet base material forming the tape attachment portion 13C to the tape main body portion 13B, nonwoven fabric, plastic film, poly-laminated nonwoven fabric, paper, or a composite material thereof can be used. , a spunbond nonwoven fabric, an air-through nonwoven fabric, or a spunlace nonwoven fabric having a basis weight of 20 to 100 g/m ² is preferred.

(target sheet)
A target sheet 20 having a target for facilitating the connection is preferably provided at the connection point of the connection tape 13 in the ventral portion F. As shown in FIG. When the connecting portion 13A is a hook material, the target sheet 20 may be one in which a large number of loop threads are provided on the surface of a sheet base material made of a plastic film or a non-woven fabric so that the engaging protrusions of the hook material can be entangled. Further, in the case of the adhesive layer, a sheet substrate made of a plastic film having a smooth surface and having high adhesiveness and having a release treatment applied to the surface thereof can be used. In addition, when the connecting portion of the connecting tape 13 in the abdominal portion F is made of nonwoven fabric, for example, when the outer nonwoven fabric 12 is provided as in the illustrated embodiment, the target sheet 20 is omitted, and the hook material is used as the fiber of the outer nonwoven fabric 12. It can also be tangled and connected. In this case, a target sheet 20 as a mark may be provided between the exterior nonwoven fabric 12 and the liquid-impermeable resin film 11 .

Preferred embodiments of the present invention are shown below.
FIG. 8 is an explanatory view of providing the embossed recesses 110 in the embossed area with the embossing roller 120. FIG. FIG. 9 is an explanatory view of applying the adhesive portion 112 along the edge 56f of the constricted portion with the adhesive roller 100. As shown in FIG. FIG. 10 is a plan view of an absorbent element provided with adhesive portions 112 and embossed recesses 110 . As an example, the dotted rectangular area in the center of the absorbent element 50 represents the embossed area 114 . FIG. 11 is a cross-sectional view of an embossed recess. The cross section shows a plane obtained by cutting the absorbent element 50 from the front side to the back side, that is, from the front side 56 a to the back side 56 b of the absorbent body 56 . The first portion and the second portion of the packaging sheet 58 are directly adhered (welded) in the embossed recesses 110 . Here, the state in which "the first portion and the second portion of the packaging sheet 58 are directly adhered (welded)" means that the first portion and the second portion are directly adhered (welded) without any other member. a state in which the first portion and the second portion are directly bonded (welded) with the absorbent body 56 interposed therebetween; A state in which at least one member is melted and the first portion and the second portion are directly bonded (welded) can be exemplified, but the present invention is not limited to this. FIG. 12 is an explanatory view showing an example of a step of providing a bonded portion and embossed recesses. After the adhesive portion 112 is applied to the absorbent element 50 with the adhesive roller 100 , the embossed recesses 110 are applied with the embossing roller 120 . The roller 105 is a facing roller that functions as a pair with the bonding roller 100 , and the roller 125 is a facing roller that functions as a pair with the embossing roller 120 . FIG. 13 is another form of embossed recesses 110 . An L-shaped embossed recess 110 is provided in the embossed area. FIG. 14 is another form of embossed depressions. A curvilinear embossed recess 110 is provided in the embossed area. FIG. 15 is an explanatory view of applying the adhesive portion and the embossed recesses with a single roller 100'. FIG. 16 is an explanatory diagram of the vicinity of the protruding portion of the roller 100'. The length of the protrusions 101 providing the embossed recesses 110 is shorter than the length of the protrusions 102 providing the adhesive portions 112 . Using this roller 100 ′, the first and second parts are firmly adhered at the adhered portion 112 and not adhered at the embossed recesses 110 . FIG. 17 is an explanatory diagram of the vicinity of the protruded portion of the roller 100'. The length of the protruding portion 101 that provides the embossed recesses 110 and the length of the protruding portion 102 that provides the adhesive portion 112 are the same. Using this roller 100', the first part and the second part are firmly adhered at the adhesive part 112 and the embossed depressions. Figure 18 is a plan view of an absorbent element of another embodiment. Glued portions 112 are glued in spaced curved lines. FIG. 19 is a cross-sectional view of an embossed recess 110 of another embodiment. The cross section shows a plane obtained by cutting the absorbent element 50 from the front side to the back side, that is, from the front side 56 a to the back side 56 b of the absorbent body 56 . The first portion and the second portion of the packaging sheet 58 are directly adhered (welded) in the embossed recesses 110 . That is, the first portion and the second portion are adhered (welded) with the absorbent body 56 interposed therebetween. FIG. 20 is an enlarged view of the embossed recesses 110. FIG.

Characteristically, in the present embodiment, the absorber 56 can preferably have an hourglass shape. As shown in FIG. 10, the hourglass-shaped absorber 56 has a constricted portion in the middle of the absorber 56 in the front-rear direction LD, and narrows in the width direction WD at the constricted portion. Here, on both side edges in the width direction of the absorbent body 56, a region surrounded by a starting point 113s of the edge 56f of the constricted portion, an end point 113e of the edge of the constricted portion, and an edge 56f of the constricted portion is defined as a constricted portion outer region 113. It says.
The middle of the front-rear direction LD of the absorbent body 56 having a constricted portion can be, for example, a portion obtained by dividing the length of the front-rear direction LD into four and excluding the front end and the rear end thereof, but is not limited to this. .
As the absorbent body 56, a fiber assembly obtained by laminating short fibers such as cotton pulp and synthetic fibers can be used. Also, a filament assembly obtained by opening a tow (fiber bundle) of synthetic fibers such as cellulose acetate as necessary can be used. Characteristically, however, it is preferable to use short fibrous pulp fibers and superabsorbent polymers spliced together.

The packaging sheet 58 has a first portion that covers the front side of the absorbent body 56 and a second portion that covers the back side of the absorbent body, and wraps the hourglass-shaped absorbent body 56 . The packaging sheet 58 may be configured to wrap the entire absorbent body 56 with one sheet, or may wrap the entire absorbent body 56 with a plurality of sheets such as two upper and lower sheets. Of the first portion of the packaging sheet 58 covering the front side of the absorbent body 56, the portion facing the constricted portion outer region 113 is referred to as a first constricted portion outer portion 113a. Further, of the second portion of the packaging sheet 58 that covers the back side of the absorbent body 56, the portion that faces the constricted portion outer region 113 is referred to as a second constricted portion outer portion 113b.
The first constricted portion outer portion 113a and the second constricted portion outer portion 113b are adhered with a hot-melt adhesive (or adhered (welded) with an ultrasonic horn). ). Characteristically, the first constriction outer portion 113a and the second constriction outer portion 113b are bonded (or welded) along the constriction edge 56f to form the bonded portion 112. As shown in FIG. The adhesive portions 112 may be arranged continuously or intermittently. The adhesive portion 112 is preferably provided at a distance 112L within 5 mm outward from the edge 56f of the constricted portion. Also, it is preferable that the thickness of the adhesive portion 112 is 3 to 5 mm. One of the purposes of the adhesive portion 112 is to prevent the constricted portion of the absorber 56 from twisting or cracking due to movement (change in posture) of the wearer. If the adhesive portion 112 is provided more than 5 mm from the edge 56f of the constricted portion, it becomes difficult to prevent the constricted portion from twisting or cracking. If the thickness of the adhesive portion 112 is smaller than the above range, the adhesive portion 112 may come off. In addition, since the adhesive portion 112 is hardened by the adhesion of the hot-melt adhesive, if it is thicker than the above range, the attachment portion 112 will irritate the skin when the absorbent article is worn, causing a sense of incongruity or discomfort. may cause However, when the adhesive portion 112 is provided at the above position and within the above thickness range, the adhesive portion 112 is close to the edge 56f of the constricted portion (that is, the thick portion), so that when the absorbent article is worn, the adhesive portion 112 is close to the edge 56f. The portion 112 is less likely to come into contact with the skin, making it less likely that discomfort or discomfort will occur. It also has the effect of preventing the superabsorbent polymer from falling off from the absorbent body 56 .
Both edges of the adhesive portion 112 should preferably not protrude outward beyond the width direction WD side edges of the absorber 56 . If the edge of the adhesive portion 112 were to protrude outward, the protruding portion would irritate the skin, which could cause discomfort or discomfort.

(Emboss recess)
Embossed depressions 110 extending from the first portion covering the front side of the absorbent body 56 to at least the middle of the absorbent body 56 in the thickness direction are arranged at intervals in a range including at least a portion overlapping with the constricted portion of the absorbent body 56 in the absorbent element 50. It is The middle in the thickness direction refers to, for example, the 2nd division (middle of 3 divisions) when the thickness is divided into 3 equal parts in the thickness direction, but it is not limited to this.
When arranging the embossed depressions 110 in a range including at least a portion of the absorbent element 50 that overlaps with the constricted portion of the absorbent body 56, for example, the embossed depressions 110 may be arranged in a range that overlaps the entire absorbent body 56 in the absorbent element 50. , the embossed recesses 110 may be arranged in a range overlapping with the constricted portion of the absorbent element 50 . In addition, the range may overlap with a portion of the absorbent element 50 that is obtained by dividing the absorbent body 56 into four equal parts in the front-rear direction LD and excluding the first equal division at the front end and the first equal division at the rear end. It is not limited to this. In particular, by arranging the embossed concave portions 110 in the constricted portion, the thickness of the constricted portion is reduced, so that the absorbent article becomes thinner and the flexibility and fitting properties can be improved. In addition, since the edges 56f of the constricted portion on both sides in the width direction WD are firmly adhered by the adhesive portions 112, the constricted portion is unlikely to be twisted or cracked.
The embossed recesses 110 provided in the embossed regions 114 may reach the middle of the absorbent body 56 in the thickness direction from the first portion covering the front side of the absorbent body 56, or may extend from the first portion covering the front side of the absorbent body 56. A second portion covering the back surface of the absorbent body 56 in the thickness direction of the absorbent body 56 may be reached. Furthermore, the embossed recesses 110 need not reach from the first portion covering the front side of the absorbent body 56 to the middle of the absorbent body 56 in the thickness direction. When the first part reaches the second part, the first part and the second part may or may not be glued.
When the embossed concave portion 110 is provided, the portion becomes concave, and the vicinity thereof is also concave. Since a plurality of embossed recesses 110 are provided, the vicinity of each of the embossed recesses 110 is also recessed. Therefore, the absorbent element 50 provided with the embossed recesses 110 is thinner than the absorbent element 50 not provided with the embossed recesses 110 .

As an example of the form of the embossed depressions 110, a form in which a plurality of line segments are arranged in a staggered manner in a plurality of rows and a plurality of columns can be presented. As another form of the embossed depressions 110, a form in which a plurality of substantially circular (including substantially oval) shapes are arranged in a zigzag pattern in a plurality of rows and a plurality of columns can be presented. Further, the substantially circular shape may be a continuous substantially circular shape, or may be a substantially circular arc with a part of the substantially circular shape missing (that is, a part of the substantially circular shape) (see FIG. 10). Specifically, the shape of the approximate circular arc in FIG. A recess 110 is formed. The embossed recesses 110 of one unit are provided at intervals of 110W in the width direction WD to form a row of embossed recesses 110 group. Note that the embossed recesses 110 located at the end of the row of embossed recesses 110 in the width direction WD do not necessarily constitute one unit. This interval 110W is preferably 10 to 15 mm. A plurality of groups of embossed recesses 110 in one row are provided in the front-rear direction LD (a group of embossed recesses 110 in the first row, a group of embossed recesses 110 in the second row, a group of embossed recesses 110 in the third row, . . . ). The distance 110L between rows should be 0-10 mm. If the spacing 110W and the row-to-row distance 110L are too long, the number of embossed recesses 110 in the embossed area 114 will be too small, and the effect of providing the embossed recesses 110 to reduce the thickness of the absorbent element 50 will be reduced. . Also, the thickness of each of the embossed recesses 110 is preferably 1 to 3 mm. If it is too thin, the effect of reducing the thickness of the absorbent element 50 will be reduced, and if it is too thick, the superabsorbent polymer will be densely packed in the areas where the embossed recesses 110 are formed in the absorbent body 56, resulting in a high density. For each of the embossed recesses 110 shown in FIG. 20, the length 150L in the front-rear direction is preferably 15 to 30 mm, and the length 150W in the width direction is preferably 10 to 25 mm. If the length 150L and the length 150W are too long, the number of embossed recesses 110 arranged in the embossed region 114 is too small, and improvement in flexibility and fit cannot be expected. On the other hand, if it is too short, the number of embossed concave portions 110 arranged in the embossed region 114 will be too large, and the absorbent body 56 will be divided at many locations, so that the shape tends to collapse.
In this form, in the region 114 provided with the embossed recesses 110, when an imaginary straight line is extended in the front-rear direction LD at an arbitrary position in the width direction WD, the imaginary straight line intersects with any of the embossed recesses 110 provided or Since they are in contact with each other, the diffusibility of the excreted liquid in the front-rear direction LD is good. However, since the wearer changes posture in various ways, the imaginary straight line extending in the front-rear direction LD does not necessarily have to intersect with or touch any of the provided embossed recesses 110 . In the above description, one unit of the embossed concave portion 110 is composed of an arc of a substantially circular solid line from 0° to 90° and an arc of a solid line from 180° to 270° in a plan view. It can be in any form. For example, one unit of the embossed concave portion 110 is formed by an arc of a substantially circular solid line from 0° to 60°, an arc of a solid line from 120° to 180°, and an arc of a solid line from 240° to 300°. may be formed.
Also, the embossed concave portion 110 may of course have a curved shape similar to a circular shape with a part of the arc missing. Furthermore, as another form of the embossed recesses 110, a form in which a plurality of L-shaped and S-shaped embossments are arranged in a zigzag pattern in a plurality of rows and a plurality of columns can be presented. However, the arrangement of the embossed depressions 110 described above is not limited to the zigzag pattern, and may be arranged in a grid pattern, an oblique lattice pattern, or a concentric pattern, but the arrangement is not limited to these.

The total basis weight of pulp fibers and superabsorbent polymer particles is, for example, 250 to 500 g/m ² , preferably 300 to 400 g/m ² , but is not limited to this. This is because even if the total weight per unit area is not within this range, there are cases where it is necessary to absorb a larger amount of excreted fluid, and there are also forms in which a smaller amount of excrement is acceptable.
The weight ratio of superabsorbent polymer particles to pulp fibers may range from 50 to 300%, but is not limited to this range.
The thickness of the absorber 56 is preferably 2.5 to 5.5 mm, but the thickness is not limited to this range in order to accommodate design changes due to usage of the product and other reasons.

(Thickness of embossing)
As shown in FIG. 11, it is preferable that the thickness of the absorbent element 50 is thinner at locations where the embossed recesses 110 are provided than at locations where the embossed recesses 110 are not provided. Since the portions provided with the embossed recesses 110 are recessed and thinned, excreted liquid permeated from the top sheet 30 spreads along the embossed recesses 110 . Therefore, the diffusibility of the excreted liquid is improved. The first portion of the packaging sheet 58a that covers the front side of the absorbent body 56 and the packaging sheet 58b that covers the back side of the absorbent body 56 may or may not be bonded directly at the location where the embossed recesses 110 are provided. may When the first part and the second part of the packaging sheet 58 are directly adhered to each other, even if the superabsorbent polymer provided in the absorbent body 56 absorbs the excrement and expands, the adherence remains. is maintained, and the embossed recesses 110 do not disappear due to swelling or the like. As a result of the shape of the embossed recesses 110 being maintained, additional bodily fluids can also travel through the embossed recesses 110 and be diffused. On the other hand, as shown in FIG. 19, the first part and the second part can be exemplified by a state in which they are adhered via an absorbent body 56 . Since the first part and the absorbent body 56, and the second part and the absorbent body 56 are adhered with a hot-melt adhesive, the shape of the absorbent element 50 in the vicinity of the adhered portions is affected by changes in the wearer's posture and excretory fluids. The recessed state of the embossed recesses 110 is maintained even when deformed by absorption. However, depending on the amount of the hot-melt adhesive applied, it is possible that the embossed recesses 110 may swell.
The embossed concave portions 110 can be adhered with a hot-melt adhesive or other adhesives, but they can also be adhered (or welded) with an ultrasonic horn or the like. Similarly, the portions along the edge 56f of the constricted portion in the first portion and the second portion can also be adhered with a hot-melt adhesive or other adhesive, or adhered (or welded) with an ultrasonic horn. can also

When the embossed recesses 110 are formed in a plurality of continuous lines as in Patent Document 1, the area ratio of the embossed recesses 110 occupying the absorbing element 50 is relatively large, so the thickness of the absorbing element 50 is larger than that of the present invention. It gives a thin impression. Forming a large number of embossed recesses to make the absorbent element 50 thinner reduces its rigidity. In addition, kinks and cracks are likely to occur. On the other hand, in the present invention, since the embossed recesses 110 are provided intermittently in the embossed regions 114, the same area ratio is relatively small. Therefore, the softness of the absorbent element 50 is maintained. In addition, since the softness is maintained, twisting and cracking are less likely to occur.

(Manufacturing process method 1)
An example of the manufacturing process of the absorbent element 50 is as follows. Adhesive such as hot-melt adhesive is applied to one surface of the packaging sheet 58 . The absorbent body 56 is spun on the surface coated with the adhesive by a splicing drum. An adhesive is applied to the front side of the spliced absorbent body 56 and the absorbent body 56 is covered (wrapped) with a packaging sheet 58 . At this time, the first constricted portion outer portion 113a and the second constricted portion outer portion 113b overlap in the constricted portion outer region. Then, the first portion and the second portion are adhered along the edge 56f of the constricted portion. Specifically, the first constricted portion outer portion 113a and the second constricted portion outer portion 113b are pressed by the protruding portion 102 provided on the bonding roller 100 and adhered along the edge 56f of the constricted portion. to form The adhesive portion 112 may be formed in a continuous linear shape, or may be formed in an intermittent linear shape. After that, an embossed concave portion 110 extending from the first portion to at least the middle of the absorber 56 in the thickness direction is formed in a range including at least a portion of the absorbent element 50 that overlaps the constricted portion of the absorber 56 . Specifically, a plurality of embossed recesses 110 are provided by pressing with the protrusions 101 provided on the embossing roller 120 . Here, the range including at least the portion overlapping the constricted portion of the absorbent body 56 in the absorbent element 50 is as described above.
The embossed recesses 110 provided in the embossed regions 114 may reach the middle of the absorbent body 56 in the thickness direction from the first portion covering the front side of the absorbent body 56, or may extend from the first portion covering the front side of the absorbent body 56. A second portion covering the back surface of the absorbent body 56 in the thickness direction of the absorbent body 56 may be reached. Furthermore, the embossed recesses 110 need not reach from the first portion covering the front side of the absorbent body 56 to the middle of the absorbent body 56 in the thickness direction. When the first part reaches the second part, the first part and the second part may or may not be glued.
The bonding roller 100 described above forms the bonding portion 112 by applying pressure. Alternatively, the bonding portion 112 may be formed by bonding (welding) with an ultrasonic horn. When bonding (welding) by ultrasonic waves, the bonding portion 112 can be bonded (welded) without using an adhesive, so the adhesive may or may not be used as appropriate. Also, the embossed recesses 110 may be provided by a method of applying pressure with the embossing roller 120 for bonding, or a method of bonding (welding) with an ultrasonic horn.

(Second manufacturing process method)
An example of another manufacturing process for the absorbent element 50 is as follows. Adhesive such as hot-melt adhesive is applied to one surface of the packaging sheet 58 . The absorbent body 56 is spun on the surface coated with the adhesive by a splicing drum. An adhesive is applied to the front side of the spliced absorbent body 56 and the absorbent body 56 is covered (wrapped) with a packaging sheet 58 . At this time, the first constricted portion outer portion 113 a and the second constricted portion outer portion 113 b overlap in the constricted portion outer region 113 . Then, the first portion and the second portion are adhered along the edge 56f of the constricted portion. Specifically, the first constricted portion outer portion 113a and the second constricted portion outer portion 113b are pressed by the protruding portion 102 provided on the roller 100′ and adhered along the edge 56f of the constricted portion. to form The adhesive portion 112 may be formed in a continuous linear shape, or may be formed in an intermittent linear shape. Simultaneously with the formation of the adhesive portion 112 , an embossed concave portion extending from the first portion to at least the middle of the absorbent body 56 in the thickness direction is formed in a range including at least a portion of the absorbent element 50 that overlaps the constricted portion of the absorbent body 56 . Specifically, a plurality of embossed concave portions 110 are provided by pressing with a protruding portion 101 provided on the roller 100'.
The embossed recesses 110 provided in the embossed regions 114 may reach the middle of the absorbent body 56 in the thickness direction from the first portion covering the front side of the absorbent body 56, or may extend from the first portion covering the front side of the absorbent body 56. A second portion covering the back surface of the absorbent body 56 in the thickness direction of the absorbent body 56 may be reached. Furthermore, the embossed recesses 110 need not reach from the first portion covering the front side of the absorbent body 56 to the middle of the absorbent body 56 in the thickness direction. When the first part reaches the second part, the first part and the second part may or may not be glued.
The roller 100' described above forms the bonded portion 112 by applying pressure, but apart from this, the bonded portion 112 may be formed by bonding (welding) with an ultrasonic horn. When bonding (welding) by ultrasonic waves, the bonding portion 112 can be bonded (welded) without using an adhesive, so the adhesive may or may not be used as appropriate. Also, the embossed recesses 110 may be provided by a method of applying pressure with the embossing roller 120 for bonding, or a method of bonding (welding) with an ultrasonic horn.
In addition, when bonding (welding) by an ultrasonic horn, it is preferable to use a non-woven fabric for the packaging sheet 58 . SMS and SMMS (spunbond/meltblown/meltblown/spunbond) nonwoven fabrics are particularly suitable, and polypropylene, polyethylene/polypropylene, etc. can be used as the material thereof.
When the embossed recesses 110 are provided so that the packaging sheet 58a and the packaging sheet 58b are spaced apart, the projection length of the projections 102 should be longer than the projection length of the projections 101 provided on the roller 100'. In this way, the embossed recesses 110 separate the packaging sheet 58a and the packaging sheet b, and the adhesive portions 112 are reliably bonded. On the other hand, when the embossed recesses 110 are provided so that the packaging sheet 58a and the packaging sheet b are directly bonded, the projection length of the projections 101 and the projections 102 of the roller 100' should be the same. . In this way, the embossed depressions 110 are directly bonded between the packaging sheets 58a and b, and the bonding portions 112 are similarly directly bonded between the packaging sheets 58a and b.
When the adhesive portion 112 is firmly adhered, the constricted portion of the absorbent body 56 is fixed by the adhesive portion 112 without being displaced, so that the constricted portion does not collapse or break, and the crotch portion of the wearer can be securely attached. It fits and keeps its shape.
In addition, by providing the embossed recesses 110 in the embossed regions 114 , the thickness of the absorbing element 50 is thinner in the areas where the embossed recesses 110 are provided in the absorbent element 50 than in the areas where the embossed recesses 110 are not provided. The thinness prevents the absorbent body 56 from being twisted or cracked, and the absorbent element 50 is thinned as a whole, so that the absorbent article surely fits the body and gives a stylish impression.
Moreover, in the form in which the embossed recesses 110 are arranged in a zigzag pattern at intervals, the absorbent element 50 is not crushed too much and the superabsorbent polymer contained in the absorbent body 56 is not locally unevenly distributed. If the superabsorbent polymer is unevenly distributed inside the absorbent body 56, for example, in the vicinity of the surface, when wearing the absorbent article, the wearer receives a harsh stimulus from the superabsorbent polymer and feels uncomfortable or uncomfortable. There is a risk. However, in this embodiment, since the embossed recesses 110 are arranged in a zigzag pattern at intervals, the superabsorbent polymer is less likely to be unevenly distributed locally. Therefore, the wearer is less likely to be stimulated by the superabsorbent polymer and is less likely to experience discomfort or discomfort.

<Description of terms in the specification>
When used in the specification, the following terms shall have the following meanings, unless stated otherwise in the specification.
- "Front-back (longitudinal) direction" means a direction connecting the ventral side (front side) and the dorsal side (rear side), and "width direction" means a direction (horizontal direction) perpendicular to the front-back direction.

• "Inside" means closer to the wearer's skin, and "outer" means farther from the wearer's skin. "Inner surface" means the surface of the member closer to the wearer's skin, and "outer surface" means the surface farther from the wearer's skin.

・"LD direction" and "WD direction" mean the flow direction (LD direction) and the lateral direction (WD direction) perpendicular to this in the manufacturing equipment, and either one is the front-back direction of the product. , and the other is the width direction of the product. The LD direction of the nonwoven fabric is the direction of fiber orientation of the nonwoven fabric. The fiber orientation is the direction along which the fibers of the nonwoven fabric are aligned. It can be determined by a simple measurement method for determining the orientation direction.

- "Unfolded state" means a flat unfolded state without contraction or slack.

- "Elongation rate" means a value when the natural length is taken as 100%.

- "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 deionized water: 97.09 wt%) 1.0 g of superabsorbent polymer is added to 49.0 g and stirred with a stirrer. The resulting gel is left in a constant temperature and humidity bath at 40° C. and 60% RH for 3 hours, then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500 manufactured by I. techno Engineering).

- "Matsuke" 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 a constant weight. Pre-drying refers to making a sample or test piece constant weight in an environment at a temperature of 100°C. Fibers with an official moisture content of 0.0% do not need to be pre-dried. Using a sampling template (100 mm x 100 mm), a sample with dimensions of 100 mm x 100 mm is cut from the constant weight specimen. The weight of the sample is measured, multiplied by 100 to calculate the weight per square meter, and used as basis weight.

- "Thickness" is automatically measured using an automatic thickness gauge (KES-G5 handy compression tester) under the conditions of a load of 0.098 N/cm ² and a pressurized area of 2 cm ² .

・The “water absorption” is measured according to JIS K7223-1996 “Testing method for water absorption of super absorbent polymer”.

・"Water absorption rate" is "Time to end point" when JIS K7224-1996 "Test method for water absorption rate of superabsorbent polymer" is performed using 2g of superabsorbent polymer and 50g of physiological saline. and

・If there is no description about environmental conditions for testing and measurement, the test and measurement shall be performed in a laboratory or equipment under standard conditions (test location: temperature 23±1°C, relative humidity 50±2%). do.

・Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.

The present invention can be applied to general disposable diapers such as pants-type disposable diapers and pad-type disposable diapers in addition to tape-type disposable diapers as described above, and also to other wearable articles such as sanitary napkins. It goes without saying that this is applicable.

DESCRIPTION OF SYMBOLS 11... Liquid impermeable resin film, 12... Exterior nonwoven fabric, 13... Connection tape, 13A... Connection part, 13B... Tape body part, 13C... Tape attachment part, 20... Target sheet, 21... Edge part, 30... Top Sheet 40 Intermediate sheet 50 Absorbent element 56 Absorbent body 56 f Constricted edge 58 Wrapping sheet 60 Raised gather 62 Gathered sheet 71 Notch 72 Low basis weight part , 110... Embossed concave portion, 112... Adhesive portion, B... Dorsal portion, F... Ventral portion

Claims (6)

Having an absorbent element provided in a range including the crotch part,
The absorbent element includes an absorbent body in which at least short-fiber absorbent materials are stacked, and a packaging sheet that wraps the absorbent body,
The packaging sheet has a first portion covering the front side of the absorbent body and a second portion covering the back side of the absorbent body,
The absorbent body has a constricted portion in the middle in the front-rear direction,
the first portion and the second portion are linearly adhered along the edge of the constricted portion to form an adhered portion;
Both edges of the adhesive portion do not protrude outward beyond the widthwise side edges of the absorbent body,
embossed recesses recessed from the first portion in the thickness direction of the absorbent body are arranged at intervals in a range including at least a portion of the absorbent element overlapping with the constricted portion of the absorbent body,
The embossed depressions are formed on the surface of the absorbent element, in plan view, in a clockwise direction having a center and a starting point in the front-rear direction of the absorbent body, and an arc in the range of 0° to 90° and in the range of 180° to 270°. A first embossed recess group that constitutes one unit with an arc of It consists of a second embossed recessed portion group,
An absorbent article characterized by: The absorber is made by stacking a mixture of short fiber pulp fibers and superabsorbent polymer particles,
The total basis weight of the pulp fibers and the superabsorbent polymer particles is 250 to 500 g/m ² , the weight ratio of the superabsorbent polymer particles to the pulp fibers is 50 to 300%, and the thickness of the absorbent body is 2.5. is ~5.5 mm;
The absorbent article according to claim 1. The first portion and the second portion are bonded to each other in the embossed concave portion with the absorbent body interposed therebetween,
The absorbent article according to claim 1 or 2. The packaging sheet is made of a nonwoven fabric of thermoplastic resin fibers,
The bonding of the first portion and the second portion along the edge of the constricted portion and the bonding of the first portion and the second portion in the embossed recess are performed by welding the first portion and the second portion. ing,
The absorbent article according to claim 1 or 2. The embossed depressions are arranged in a zigzag pattern,
The absorbent article according to any one of claims 1 to 4. A method for manufacturing an absorbent article according to claim 1,
After bonding the first portion and the second portion along the edge of the constricted portion,
forming an embossed concave portion recessed in the thickness direction of the absorbent body from the first portion in a range including at least a portion of the absorbent element that overlaps with the constricted portion of the absorbent body;
A method for manufacturing an absorbent article characterized by:

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