JP4949875B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article for absorbing bodily fluids such as disposable diapers and absorbent pads.

As is well known, various measures have been taken for absorbent articles that are used by being attached to a body such as a disposable diaper.
For example, it is often performed to improve fit to the body, and as a specific means, a flexible shaft is arranged in parallel in the front-rear direction at the center of the article so that it can be easily deformed into a shape that fits the crotch (For example, Patent Document 1) is known.
JP 2006-149571

However, the conventional technique represented by Patent Document 1 has an improved fit at the crotch part, but it fits the part of the base of the leg, such as the groin part and the groin, which are particularly located on the front and back surfaces of the body. However, the concave portions formed from the crotch portion to these portions are not considered, and leakage from such portions is not sufficiently prevented.
Then, the main subject of this invention is providing the absorbent article which is excellent in the fitting property of the base part of the leg in front and back surfaces of bodies, such as a groin part as well as a crotch part.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
An absorbent article in which an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impervious back sheet,
The absorber has a laminated structure of a front surface side absorption core and a back surface side absorption core,
A central easy-folding portion extending in the front-rear direction at the center in the width direction of the surface-side absorbent core ,
In the back-side absorbent core, a pair of substantially V-shaped or substantially C-shaped extending in the front-rear direction and the widthwise center from the center in the front-rear direction to the front-rear edge side with respect to the position of the center easily foldable part . An absorbent article comprising a side easily folded portion.

(Function and effect)
Since the absorbent article of the present invention is easily broken by the center easy-folding part extending in the front-rear direction at the center in the width direction, it is difficult to generate useless wrinkles particularly in the narrow crotch part when worn, and the article side edge is large in the crotch part. The body fluid is effectively fitted to the inner side of the thigh, and the body fluid is guided and diffused in the front-rear direction of the article along the folds and bends formed by the center easy-folding part.
And a ridge is formed radially by bending and bending of a trident portion formed by a front side extended portion or a rear side extended portion of the central easy fold portion and a pair of V-shaped side easy fold portions, On the front side (back side), it spreads from the crotch to the groin, and on the back side (ventral side), it fits suitably to the radial recesses on the front and back surfaces of the body that extend from the crotch to the rupture and groin.
In addition, the side easy-to-fold part is bent and bent so as to follow and fit the groin and the inguinal part, and body fluid is guided and diffused along the side easily-folded part.
In the present invention, since the absorber has a layer structure, the liquid absorbency is excellent. In particular, it is possible to increase the liquid absorption amount on the side edge side with respect to the side easily folded portion. Moreover, since the center easy folding part to which the force for bending strongly applies at the time of mounting | wearing exists in the position (surface side absorption core) near a skin contact surface, it becomes easy to fit along the shape of a body.

<Invention of Claim 2>
The absorptive article according to claim 1 in which any one end part of the front-and-back end part of a central easy-folding part or its neighborhood has higher liquid absorbency than other parts.

(Function and effect)
The body fluid guided to the end of the line along the crease line formed by the central easy-folding portion at the time of mounting can be effectively absorbed.

<Invention of Claim 3>
The absorptive article according to claim 1 or 2 in which at least one of a central easy-folding part and a side part easy-folding part is a line formed by press processing.

(Function and effect)
It can be formed easily, and can be surely set to the bending position.

<Invention of Claim 4>
The absorptive article according to any one of claims 1 to 3, wherein at least one of the center easily foldable portion and the side easily foldable portion is formed so that the density of the absorber is less sparse than other portions.

(Function and effect)
In addition to Claim 3 and the function and effect, the film is excellent in deformability in the thickness direction and has higher fit.

<Invention of Claim 5>
The absorbent body has a laminated structure of a front surface side absorption core and a wider back surface side absorption core, and the side easily foldable portion extends outward in the width direction from a side edge of the back surface side absorption core. the absorbent article according to any one of claims 1 and 4 are.

  As described above, according to the present invention, there is provided an absorbent article that is excellent in fitting properties such as a base portion of a leg on the front and rear surfaces of a body such as a groin portion as well as a crotch portion.

Next, an embodiment of the absorbent article of the present invention will be described in detail below with reference to the drawings, taking a disposable diaper as an example.
“First Embodiment”
The disposable diaper X1 which concerns on 1st Embodiment is shown to FIGS. 6 and 7 are representative examples of this example, and the following description will be made with reference to FIGS. 1 to 5 as another example based on this example.
As shown in FIG. 1, the disposable diaper X1 includes an abdominal side F located on the abdomen side of the wearer, a back side B located on the back side, and an abdominal side F and the back side B when worn. A diaper main body Z having a crotch M positioned between them, and a so-called fastening type comprising a pair of left and right fastening pieces 4, 4 connected to the left and right edges of the back side B of the diaper main body Z. It is a disposable diaper X1.
In this example , the fastening pieces 4, 4 are obtained by arranging male fasteners 41, 41 of mechanical fasteners on a nonwoven fabric sheet, and the fastening portion 5 has a female fastener sheet of mechanical fasteners on the outer surface side of the ventral side F. It is formed by bonding. In addition, the structure used for a known fastening disposable diaper can be selected suitably for the structure of the fastening pieces 4 and 4 and the fastening part 5 to which this is latched.

The diaper main body Z has a layer structure in which an absorbent body 3 is interposed between a liquid-permeable top sheet 1 and a liquid-impervious back sheet 2, and the liquid-permeable top sheet 1 and the liquid-impervious back sheet 2. The front and rear end portions and the both side portions extend outward from the absorbent body 3, and the two sheets are joined to each other at the extended portions. The joining method is not particularly limited. According to known methods. For example, hot melt bonding, ultrasonic sealing, heat sealing (thermal fusion), heat pressing (thermocompression bonding), or a combination thereof can be used.
As shown in the drawing, the planar outline of the diaper main body Z is formed with leg peripheral edges EL, EL that are recessed at the front and rear center portions on both sides and curved in the center in the width direction, and the leg peripheral edges EL, EL. A substantially hourglass-shaped planar outer shape in which a wider ventral waist part and a back waist part are formed on the edge side in the front-rear direction, which is wider than between both side leg peripheral edges EL, EL.
In this example , similarly to the diaper main body Z, the absorbent body 3 also has a planar outer shape in which the center portions in the front-rear direction on both sides are notched, and the fit to the leg periphery is enhanced.

Here, the liquid-permeable surface sheet 1 is a net-like sheet material obtained by plain weaving of yarns such as nylon and polyethylene terephthalate, a film sheet material in which a large number of through holes are formed, a film sheet material such as polyethylene and polypropylene, and a liquid-permeable material. Suitable woven fabrics and nonwoven fabrics are suitable, and nonwoven fabrics are particularly suitable. Nonwoven fabrics can be made from synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cupra, and natural fibers such as cotton. Spunlace method, spunbond method, thermal bond Processed by an appropriate processing method such as a method, a melt blown method, or a needle punch method can be used.
A layered nonwoven fabric such as an SMS nonwoven fabric, a point bond nonwoven fabric, a plastic film such as a polyethylene film, or a laminated nonwoven fabric obtained by laminating a plastic film and a nonwoven fabric may also be used.

  The liquid-impermeable back sheet 2 is a known resin sheet such as polyethylene or polypropylene, in particular, a sheet is formed by kneading an inorganic filler in a resin such as polyethylene or polypropylene, and then stretched uniaxially or biaxially. A microporous resin sheet obtained by doing so is preferably used. The liquid-impermeable back sheet 2 is particularly preferably a laminate of an outer sheet made of a nonwoven fabric or the like on the outer surface of the resinous sheet for improving the touch. The nonwoven fabric sheet that can be used for the exterior sheet is the same as that used for the liquid-permeable surface sheet.

The absorbent body 3 can be configured by enveloping an absorbent core in which absorbent polymer is dispersed in fibers such as piled pulp and nonwoven fabric with a permeable sheet such as crepe paper, nonwoven fabric sheet, and perforated sheet.
Examples of the superabsorbent polymer include carboxymethyl cellulose, polyacrylic acid and salts thereof, acrylate polymer cross-linked product, starch-acrylic acid graft copolymer, starch-acrylonitrile graft copolymer hydrolyzate, polyoxyethylene cross-linked product Products, crosslinked products of carboxymethyl cellulose, polyethylene oxide, polyacrylamide and other partially crosslinked polymers, or a copolymer of isobutylene and maleic acid are preferably used. What added the blocking inhibitor in order to suppress the blocking property by moisture absorption of a product can also be used. In addition, the superabsorbent polymer has various forms such as powder, particles, granules, pellets, sol, suspension, gel, film, and nonwoven fabric. Any of them can be used in the present invention, and a particulate material is particularly preferably used.

On the other hand, elastic elastic members 6, 6 around the legs are fixed in an extended state on both sides in the width direction of the diaper main body Z along the front-rear direction. In this example , the leg elastic members 6, 6... Are arranged between the front and back sheets, and are arranged so as to constitute a so-called flat gather. The elastic elastic members around the legs can be fixed to adjacent appropriate sheets using a hot melt adhesive or the like.
The leg elastic members 6, 6... Are arranged so as to be slightly curved toward the center in the width direction of the diaper main body Z along the leg periphery EL. It is located on the edge side in the front-rear direction about 0 to 50 mm from the peripheral edges EL.
As is apparent from the figure, a plurality of leg elastic members 6, 6... Can be arranged, and the number in this case is preferably about 2 to 8. Moreover, it is good that the space | interval of an adjacent leg periphery elastic elastic member shall be 4-10 mm.
Due to the presence of the leg elastic members 6, 6..., The leg peripheral edge is pushed up to the skin contact surface side with elastic elasticity, and fits effectively around the wearer's leg. In addition, the leg periphery is not a base part but a part located on the leg tip side.
In this example , the elastic elastic member 6 around the leg typically uses rubber thread. As the thread rubber, those made of synthetic rubber or natural rubber and those mainly composed of natural rubber are suitable.
The leg-hole elastic member 6 is a material having rubber elasticity, which is formed (molded) into a thread, string, belt, net, foam, or the like, including a generally well-known elastomer resin in addition to the rubber thread. Can be used.

  On the other hand, as the hot-melt adhesive used for fixing the elastic elastic member 6 and bonding the sheets 1 and 2 together, known ones used in this type of disposable diaper can be used. Styrenic block copolymer, polyurethane block copolymer, polyester block copolymer, polyamide block copolymer, copolymer blend base polymer, rosin resin, polyterpene resin, terpene phenol resin, Solid-state adhesion-imparting components such as dicyclopentadiene petroleum resins, aliphatic petroleum resins, aromatic petroleum resins, copolymer petroleum resins, alicyclic petroleum resins, xylene resins and elastomers, and waxes Those containing at least a plasticizer component such as an antioxidant and a constituent component are suitable.

On the other hand, the disposable diaper X1 includes a strip-shaped central easy-folding part 10 extending in the front-rear direction at the center in the width direction, and a back side in the front-rear direction from the front-rear direction and the center part in the width direction. A pair of side easily foldable portions 11 and 11 that are substantially V-shaped and extend toward the edge E2 are provided.
These easy-folding parts 10 and 11 are arranged so that a part thereof is positioned between the elastic elastic members 6 and 6 around the legs and between the recesses of the absorbent body 3 and elastically elastic around the legs when worn. The expansion / contraction force of the members 6, 6... Acts on each easy-folding portion 10, and the folding at the easy-folding portion 10 is easily induced, and the skin contact surface side is easily deformed into a three-dimensional shape that easily fits against the skin. Moreover, when it becomes three-dimensional shape, the both-sides notch edge part of the absorber 3 tends to stand on the skin surface side.

More specifically, the easily foldable portion will be described in detail. In the embodiment shown in FIG. 1, the center easily foldable portion 10 has one end 10a located at a predetermined distance from the ventral side edge E1 of the diaper main body Z and the other end 10b. The crotch part M of the diaper main body Z or the crotch part M is located slightly on the back side. It is desirable that at least the other end 10b is located closer to the back edge E2 than the center C in the front-rear direction of the diaper main body Z.
If the arrangement | positioning aspect of the center easily folding part in this example is taken, the separation distance L1 between the said one end 10a and the ventral side edge E1 of the diaper main body Z will be 3 cm or more irrespective of the magnitude | size of the diaper main body Z, It is preferable that the distance is 7 cm or more. If it is less than 3 cm, there is an increased possibility that the body fluid guided along the central easy-folding portion 10 leaks from the ventral edge E1.
In addition, the position of the other end 10b of the center easily foldable portion 10 in this example is about 0.5 to 7 cm for a so-called adult diaper, about 0.1 to 5 cm for a so-called children's diaper, and back from the center C in the front-rear direction. Located on the side. The specific length of the central easy-folding portion 10 is set to an appropriate length according to the position of each end.
In addition, in this example , the center easily folding part 10 can also take the form extended so that it might become long in the back side B, for example, as shown in FIG. In this case, the position of each end may be the position and object described above with respect to the front-rear direction center line.

On the other hand, as shown in the drawing, the side easily foldable portions 11 and 11 are respectively positioned on both sides in the width direction of the central easily foldable portion 10 and have a pair of a substantially V shape or a substantially C shape.
The one end 11a of the side easily foldable portion 11 is not particularly limited as long as it is located at the center portion in the front-rear direction, that is, the crotch portion M or the crotch portion M at a slightly back side or abdominal side. Preferably, it is preferably in the range of about 2-15 cm in the front-rear direction from the center C in the front-rear direction for so-called adult diapers, and in the range of about 1-10 cm for children.
The specific positions of the other ends 11b and 11b close to the back side edge E2 of the side easily folded portions 11 and 11 are different depending on the shape and size of the diaper main body Z. For example, in the case of a so-called diaper for adults, the diaper main body Z may be positioned at a distance of about 3 to 13 cm from the center line P in the width direction and about 1 to 10 cm from the center line C in the front-rear direction. If it is what is called a diaper for children, it is good to set it as the position spaced apart from about 1-5 cm from the width direction center line P of the diaper main body, and about 0.5-8 cm from the front-back direction center line C.
In the illustrated example, one end 11a of the side easily foldable portions 11 and 11 is on the center easily foldable portion, and the side easily foldable portions 11 and 11 and the center easily foldable portion 10 are integrated.
As another example, in the case of a C-shape, as shown in FIG. 4, it may be slightly separated from the central easily folded portion 10. In this case, the separation distance is preferably less than 4 cm. Should be less than 3 cm.

Furthermore, although not shown, when the ventral side end 10a of the central easily foldable portion 10 is located in the crotch portion, the V-shaped apex 11b of the side easily foldable portion 11 is It can also comprise so that it may be located nearer to the ventral side edge E1 of the diaper main body Z than the ventral end 10a.
On the other hand, it is desirable that the angle ∠α between the side easy-to-fold portions 11 and 11 and the center line P in the width direction is 30 to 60 degrees. In addition, although the angle with respect to the center line P in the width direction may be different between the left and right side easily foldable portions 11, it is desirable that the left and right side easily foldable portions 11 be arranged so as to be equiangular.
The side easily foldable portions 11 and 11 shown in FIG. 1 extend linearly from one end to the other end, but may be formed in a curved line shape as shown in FIG. Good.

On the other hand, the width L2 of the center easily foldable portion and the width L3 of the side easily foldable portion are appropriately designed according to the thickness of the absorber, the size of the diaper, etc., but both may be approximately 2 to 40 cm. The central easy-folding portion 10 and the side easy-folding portion 11 do not necessarily have the same width, and the left and right side easy-folding portions do not necessarily have the same width.
Here, each easy-folding part is a part that is intentionally folded within a range where there is no problem in use in consideration of the characteristics of the material constituting the absorbent article, and is given a slight vulnerability to bending, etc. In addition, it also has a function of being easily bent and wrinkled.
In this example , the easy-folding part is formed by imparting vulnerability to bending or the like by forming the thin part by pressing the absorbent core.

In addition to the easy folding part, for example, one or a plurality of slit lines are partially arranged on the absorbent core to give a weakness to bending, or the fiber density and basis weight of the absorbent core are partially sparse. By doing so, it can be formed. If for forming an easy folding portion due to the difference in basis weight, 300 to 500 g / m ² of basis weight in the portion other than the easily broken portions, good to the basis weight of the easily broken portions and 0~100g / m ² .
When the thin portion is provided in the absorbent core, in addition to pressing, for example, embossing, and fiber piles that are formed by substantially depositing pile fiber pulp or the like provided on the surface of the pile fiber drum for manufacturing the absorbent core Manufacture is possible by appropriately arranging convex portions that prevent the piled pulp or the like from being partially piled in the region.
In addition, when the easy-folding portions 10 and 11 are configured with a thin portion, if there is a concern about a decrease in absorbability of the easy-folding portions 10 and 11, for example, the absorber 3 has a structure in which a plurality of absorption cores are stacked. This can be effectively avoided. Of course, it is not limited to the case where the easy-folding portions 10 and 11 are configured by thin portions, and even when the easy-folding portions 10 and 11 are formed by other configurations, the laminated structure of the absorbent body can be employed according to the present invention .

And if an absorber is laminated | stacked according to this invention , like the absorption core shown to FIG. 6 and 7, the center easy fold part 10 in one absorption core 3A and the side part easy fold part 11 in the other absorption core 3B. , 11 may be formed. Compared to the case where one center and side portions are easily folded, the risk of damage to the absorbent core due to formation of the easily folded portion during manufacturing is greatly reduced.
And when providing the center easy fold part 10 and the side part easy fold part 11 in another absorption core in this way, as shown in the example of illustration, 3 A of absorption cores which have the center easy fold part 10 are made into a skin contact surface. It is better to place it on the near side. Moreover, it is good to make the width | variety of the absorption core which has a side part easy fold part in a position far from a skin contact surface wider than the width | variety of the absorption core which provided the center easy fold part 10. FIG. In this case, it is more preferable that the side easily folded portion extends outward in the width direction from the side edge of the absorbent core having the center easily folded portion.

At the time of wearing, the central easy-folding part 10 located in the crotch part has a stronger folding force, so that the absorption of the structure having the narrow absorbent core 3A having the central easy-folding part 10 at a position close to the skin contact surface. The body makes it easier to fit along the shape of the body. Moreover, since the side part easy folding part is not formed in the absorption core near a skin contact surface, the liquid absorptivity in the said absorption core both-sides edge part is ensured. In particular, liquid absorptivity in the vicinity of both side edges of the crotch portion is ensured. And since the said side edge part comes to stand on the skin contact surface side by the bend | folding in a center easy folding part, the side leakage in a crotch part is prevented very effectively. Furthermore, when the side easily foldable portion extends outward from the side edge of the absorbent core having the center easily foldable portion, the effect of the side easily foldable portion is more easily exhibited.
On the other hand, in the case of the above-described laminated structure, if an easy-fold portion is provided not by a thin portion but by a difference in the basis weight, the basis weight of the absorbent core near the skin contact surface is 100 to 200 g / m ² , and the skin contact It is preferable that the weight per unit area of the absorbing core far from the surface is 200 to 300 g / m ^2, and the basis weight of each easy-fold portion is 0 to 90 g / m ² . The absorption core close to the skin contact surface is easy to break, and the liquid absorption amount of the far absorption core is high, which is a preferable structure.

On the other hand, in the disposable diaper of this example , X1 has a higher absorbability of body fluid in the vicinity 20 on the back side end side of the center easy-folding part 10 than in other parts.
What is necessary is just to design suitably the specific breadth and shape of the range which raises absorptivity according to the magnitude | size of the diaper made into object, for example, for adults or children. It is desirable that it is wider than the center easily foldable portion and is interposed between the back end 10b of the center easily foldable portion 10 and the back edge E2 of the article. More preferably, it arrange | positions so that the back side edge part 10b may be surrounded, continuing to the center easy folding part 10. As shown in FIG.
Thus, by arranging the high liquid absorption region 20 in the vicinity of the back end portion 10b of the central easy-folding portion 10, the back side of the body fluid led to the back side along the central easy-folding portion 10 particularly in the supine position. Leakage from the end E2 is prevented.
Here, the high liquid absorption region 20 is formed only in the vicinity of the back end portion 10b of the central easy-folding portion 10 in this example , but instead of the back end portion 10b vicinity or the back end portion. It may be formed in the vicinity of the abdominal end 10a as well as in the vicinity of 10b.

In the present invention, the liquid absorptivity is a function of at least one of a liquid holding amount and a liquid absorption speed. In this example , both functions are enhanced, that is, the portion is configured so that the absorption speed of the body fluid is higher and the amount of liquid absorption is larger than the other portions.
In order to increase the liquid absorption rate, the conventional liquid absorption rate used for absorbent articles such as, for example, reducing the fiber density of the part of the absorbent body is within a range that does not impair the function of each easy-folding part 10, 11. The technology to improve can be taken. For the purpose of enhancing the liquid diffusibility, a so-called second sheet interposed between the top sheet and the absorber may be positioned at the site. Moreover, you may distribute | arrange more superabsorbent polymer to this part than another part, and may arrange | position partly the superabsorbent polymer with a quick absorption rate. What level of absorption rate should be increased may be determined as appropriate.
In order to increase the amount of liquid retained, a technique for increasing the conventional liquid absorption rate used for absorbent articles, for example, increasing the fiber density of the portion of the absorbent body within a range that does not impair the functions of the easily-foldable portions 10 and 11. Can be used. More superabsorbent polymer may be disposed in the portion than other portions, or a superabsorbent polymer having a high absorption amount may be partially disposed. What level of liquid holding amount may be determined as appropriate.

In the disposable diaper of this example explained in full detail above, it fits suitably in a narrow crotch part by bending at the center easy folding part 10 and bending at the time of wearing.
Furthermore, a crease is formed radially by bending and bending of the central easily foldable portion 10 and the trident portion formed by the pair of V-shaped side easily foldable portions 11, 11. It comes to fit suitably in the radial hollow part which spreads over.
In addition, due to the folding and bending of the side easy-to-fold part 11, the heel groove is followed to fit.

“Second Embodiment”
2nd Embodiment is the form which made the arrangement | positioning of the side part easy folding parts 11 and 11 in 1st Embodiment into the line object in the front-back direction centerline C substantially. That is, in the first embodiment X1, the side easy-to-fold portions 11 and 11 that extend long toward the back edge E2 are used. However, the second embodiment is a ventral side. This is a form having a pair of substantially easily V-shaped or substantially C-shaped side easily foldable portions 11 and 11 extending long toward the edge E1. Other configurations are the same as those in the first embodiment.
Therefore, in this example , the central easy-folding portion 10 extends long on the back side, and the back side end 10b is located at a predetermined distance from the back side edge E2 of the diaper main body Z, and the ventral side end 10a is the diaper. The crotch part M of the main body Z or the crotch part M is located slightly on the ventral side. At least the ventral end 10a is located closer to the ventral edge E1 than the center C in the front-rear direction of the diaper main body Z.
The separation distance between the ventral side edge E1 of the diaper main body Z and the one end 10a is preferably 3 cm or more and 7 cm or more regardless of the size of the diaper main body. If it is less than 3 cm, there is a high possibility that the body fluid guided along the central easy-folding portion will leak from the ventral edge.
Further, the position of the other end 10b of the center easily foldable portion 10 in this embodiment is about 0.5 to 7 cm for a so-called adult diaper, about 0.1 to 5 cm for a so-called diaper for children, and is located behind the center in the front-rear direction. Is located. The specific length of the central easy-folding portion is set to an appropriate length according to the position of each end.
In addition, although not shown in figure, as another example , the form extended so that a center easy folding part may become long in a back | dorsal side can also be taken.
In this example , the superabsorbent region 20 is provided in the vicinity of the end 10a close to the ventral edge E1.
On the other hand, the specific position of the one end 10a close to the ventral side edge E1 of the side easily foldable portions 11, 11 differs depending on the shape and size of the diaper main body Z. For example, if it is a so-called adult diaper, A position that is about 3 to 13 cm away from the center line P in the width direction of the diaper main body Z and about 1 to 25 cm away from the center line C in the front-rear direction corresponds to a so-called diaper for children. It is good to set it at a position about 0.5 to 15 cm away from the center line C in the front-rear direction about ˜5 cm.
The back side end 11b of the side easy-to-fold parts 11 and 11 is not particularly limited as long as it is located in the center part in the front-rear direction, that is, the crotch part M or the crotch part M slightly at the back side or the ventral side. Preferably, the so-called adult diaper is positioned in the range of about 2 to 6 cm from the center in the front-rear direction, and in the range of about 1 to 4 cm for children.
In this example , a fold is formed radially by bending and bending of a trident portion formed by a pair of V-shaped side easily foldable portions and a central easily foldable portion 10, and spreads from the crotch to the groin on the abdominal side. It comes to fit suitably in a radial hollow part.
Moreover, it comes to follow and fit a groin part by the bending and bending of a side part easy folding part.

“Third embodiment”
The first and second embodiments, ventral, although a pair towards one edge of the back side, which is the form with the side easy folding portion such as a substantially V-shaped, the present example, the front-rear direction center It is a form which has a pair of side part easy fold part 11A, 11A which goes to a ventral side edge E1 from a part, and a pair of side part easy fold part 11B, 11B which goes to the back side edge E2 from the front-back direction center part. Other configurations are the same as those in the first embodiment.
In the illustrated embodiment, the center easy-folding portion 10 has one end 10a at a predetermined distance from the ventral side edge E1 in the center in the width direction of the diaper main body Z, and from there through the crotch portion M, the back side edge It extends to a position separated from E2 by a predetermined distance. Of course, as shown in the first and second embodiments, a form that is offset to either the ventral side or the dorsal side may be employed.
In this example , the high liquid absorption region is disposed on both the back side and the abdomen side end portions 10a and 10b of the central easy-folding portion, and leakage from the edges E1 and E2 is suitably prevented.
The distances between the edges E1 and E2 and the ends 10a and 10b of the center easy-folding portion are as described in the first and second embodiments.
In this example, there are both effects obtained by the disposable diapers of the first and second embodiments.

  The present invention extends to the front and back body parts, particularly through the crotch part, such as pants-type disposable diapers, sanitary napkins, urine pads, etc. It can be used for a bodily fluid absorbent article that covers and attaches the base position.

It is a top view of the disposable diaper which concerns on reference embodiment. It is the II-II sectional view taken on the line of FIG. It is a top view of the disposable diaper of the other example of reference embodiment. It is a top view of the disposable diaper of another example of reference embodiment. It is a top view of the disposable diaper of another example of reference embodiment. It is a top view of the other example of the absorption core which can be used for embodiment of this invention . It is the VII-VII sectional view. It is a top view of the disposable diaper which concerns on other embodiment. It is a top view of the disposable diaper which concerns on another embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Liquid-permeable surface sheet, 2 ... Liquid-impermeable back surface sheet, 3 ... Absorber, 20 ... High liquid-absorbing area | region, 4 ... Fastening piece, 5 ... Locking part, 6 ... Elastic elastic member around a leg, DESCRIPTION OF SYMBOLS 10 ... Central easy fold part, 10a ... Central easy fold part abdominal side end, 10b ... Central easy fold part back side end, 11 ... Side part easy fold part, 11a ... Side part easy fold part abdominal side end, 11b ... Side part Easy folding part back side end, 41 ... male material, E1 ... front and rear direction ventral edge, E2 ... front and rear direction back side edge, EL ... leg circumference edge, F ... ventral side part, B ... dorsal side part, M ... crotch part, C: diaper main body longitudinal center line, Z: diaper main body, X1: disposable diaper.

Claims (5)

An absorbent article in which an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impervious back sheet,
The absorber has a laminated structure of a front surface side absorption core and a back surface side absorption core,
A central easy-folding portion extending in the front-rear direction at the center in the width direction of the surface-side absorbent core ,
In the back-side absorbent core, a pair of substantially V-shaped or substantially C-shaped extending in the front-rear direction and the widthwise center from the center in the front-rear direction to the front-rear edge side with respect to the position of the center easily foldable part . An absorbent article comprising a side easily folded portion.   The absorptive article according to claim 1 in which any one end part of the front-and-back end part of a central easy-folding part or its neighborhood has higher liquid absorbency than other parts.   The absorptive article according to claim 1 or 2 in which at least one of a central easy folding part and a side easy folding part is a line formed by press processing.   The absorptive article according to any one of claims 1 to 3, wherein at least one of the center easily foldable portion and the side easily foldable portion is formed so that the density of the absorber is less sparse than other portions. The absorbent body has a laminated structure of a front surface side absorption core and a wider back surface side absorption core, and the side easily foldable portion extends outward in the width direction from a side edge of the back surface side absorption core. the absorbent article according to any one of claims 1 and 4 are.

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