JP6901272B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article worn with a separate absorbent pad.

Various techniques for dividing an absorber in an absorbent article into a plurality of parts are known.
For example, Patent Document 1 describes an absorbent article having an absorber having a central absorber and a side absorber. There is a separation between the central absorber and the side absorber. In addition, an intermediate sheet is interposed between the central absorber and the side absorber. According to this absorbent article, there is an advantage that the fit around the base of the thigh or the inseam is improved, and leakage from around the base of the thigh is prevented.

JP-A-2015-066306

By the way, in the absorbent article having the structure described in Patent Document 1, a separate absorbent pad is detachably arranged at a position corresponding to the central absorber, and the absorbent article and the absorbent pad are combined. May be worn. In that case, urine or stool that cannot be completely absorbed by the absorbent pad flows out to the absorbent article and is absorbed and held by the absorbent article. Therefore, in order to improve the absorption of urine and feces in the absorbent article, a method of increasing the amount of pulp and water-absorbing polymer used in the absorbent body of the absorbent article to increase the absorption capacity and the thickness of the absorbent pad are used. In addition, methods such as reducing the gap between the auxiliary pad and the wearer's body have been conventionally adopted.

However, when the amount of pulp or water-absorbent polymer used in the absorbent body of the absorbent article is increased, the thickness of the absorbent body is also increased, which tends to reduce the diffusibility of the liquid in the absorbent body. In addition, the rigidity of the absorber is also increased, so that the fit is likely to decrease.

Therefore, an object of the present invention is to improve an absorbent article worn together with a separate absorbent pad, and more specifically, to provide an absorbent article having excellent absorbency of liquid leaked from the absorbent pad and having a high fit. There is.

The present invention has a crotch part and a ventral side part and a dorsal side part extending from the crotch part in the anterior-posterior direction in the longitudinal direction, respectively, and is worn together with a separate absorbent pad detachably arranged on the skin facing surface. It is an absorbent article
The absorbent article has an absorbent core and
The absorbent core comprises a central region and lateral regions located on both sides in the width direction thereof.
The central region and the lateral region are separated from each other at least in the inseam by a lateral groove extending in the longitudinal direction of the absorbent core.
The lateral region has a plurality of intersecting grooves extending in a direction intersecting the longitudinal direction of the absorbent core.
Each intersecting groove provides an absorbent article in which its virtual extension intersects the longitudinal direction of the absorbent core at an angle such that it faces the central portion of the absorbent core.

Further, the present invention is detachably arranged on an absorbent article having a crotch portion, a ventral side portion and a dorsal side portion extending from the crotch portion in the longitudinal direction and back and forth, respectively, and a skin-facing surface of the absorbent article. A worn item provided with a separate absorbent pad.
The absorbent article has an absorbent core and
The absorbent core comprises a central region and lateral regions located on both sides in the width direction thereof.
The central region and the lateral region are separated from each other at least in the inseam by a lateral groove extending in the longitudinal direction of the absorbent core.
The lateral region has a plurality of intersecting grooves extending in a direction intersecting the longitudinal direction of the absorbent core.
Each cross groove intersects the longitudinal direction of the absorbent core at an angle such that its virtual extension points toward the central portion of the absorbent core.
The central region provides a worn article whose width is narrower than the width of the absorbent pad.

According to the absorbent article of the present invention, even if a liquid leaks from another absorption pad arranged on the skin facing surface, the liquid can be successfully absorbed. In addition, the absorbent article of the present invention has a high fit around the legs, which also effectively prevents liquid leakage.

FIG. 1 is a plan view of a disposable diaper according to an embodiment of the absorbent article of the present invention in an unfolded state. FIG. 2A is a cross-sectional view in the thickness direction of the disposable diaper shown in FIG. 1 along the width direction of the inseam, and FIG. 2B shows a combined form of the disposable diaper shown in FIG. 1 and an absorbent pad. It is a cross-sectional view in the thickness direction along the width direction of the inseam. FIG. 3 is a perspective view showing a combined form of the disposable diaper shown in FIG. 1 and the absorbent pad. FIG. 4 is a plan view showing an embodiment of the absorbent core. FIG. 5 is a plan view (corresponding to FIG. 4) showing another embodiment of the absorbent core. FIG. 6 is a plan view (corresponding to FIG. 4) showing still another embodiment of the absorbent core. 7 (a) is a cross-sectional view in the thickness direction (corresponding to FIG. 2) of the disposable diaper provided with the absorbent core shown in FIG. 6 along the width direction of the inseam, and FIG. 7 (b) is FIG. 7 (a). It is an enlarged view of the main part of the central groove part in). FIG. 8A is a cross-sectional view in the thickness direction along the width direction of the crotch part when wearing a disposable diaper, and FIG. 8B is a width direction of the crotch part when wearing a disposable diaper using an absorbent pad. It is a cross-sectional view in the thickness direction along.

Hereinafter, the present invention will be described based on the preferred embodiment with reference to the drawings. 1 and 2 show a disposable diaper, which is an embodiment of the absorbent article of the present invention. The diapers shown in the figure are deployable disposable diapers for adults.

The diaper 1 has a longitudinal direction X corresponding to the front-back direction of the wearer and a width direction Y orthogonal to the longitudinal direction X in the wearing state. The diaper 1 has an inseam 1M which is arranged in the inseam of the wearer at the time of wearing in a substantially central region in the longitudinal direction X. Further, the diaper 1 has a ventral side portion 1F and a dorsal side portion 1R extending from the inseam 1M to the front and back in the longitudinal direction X, respectively. The ventral portion 1F and the dorsal portion 1R are parts arranged on the ventral side and the dorsal side of the wearer when the diaper 1 is worn, respectively. The ventral portion 1F, the inseam 1M, and the dorsal portion 1R correspond to each region when the diaper 1 is roughly divided into three equal parts along the longitudinal direction X. The inseam 1M has an excretion portion facing portion that is arranged to face both the urine excretion portion and the fecal excretion portion of the wearer when the diaper 1 is worn, and the excretion portion facing portion is usually in the longitudinal direction of the diaper 1. It is located in or near the center of X.

The diaper 1 is a liquid-retaining absorber 4, a liquid-permeable surface sheet 2 arranged on the skin-facing surface side of the absorber 4 and capable of contacting the wearer's skin when worn, and the absorbent body 4. It is provided with a liquid-impermeable or liquid-impermeable back sheet 3 arranged on the non-skin facing surface side. In the plan view as shown in FIG. 1, the diaper 1 is abbreviated as vertically long, in which the central region of the longitudinal direction X located at the inseam 1M is constricted inward in the width direction Y and is long in the longitudinal direction X. It has an hourglass shape.

In the present specification, the "skin facing surface" is a surface of the absorbent article or its constituent members (for example, the absorber 4) that is directed toward the skin side of the wearer when the absorbent article is worn, that is, relatively of the wearer. It is the side closer to the skin. The "non-skin facing surface" is a surface of the absorbent article or its constituent members that is directed to the side opposite to the skin side when the absorbent article is worn, that is, to the side relatively far from the wearer's skin. Further, in the present specification, "when worn" means a state in which a normal proper wearing position, that is, a state in which the correct wearing position of the absorbent article is maintained, and the absorbent article is in a state deviated from the wearing position. If not included.

The front surface sheet 2 and the back surface sheet 3 each have a larger size than the absorber 4, and extend outward from the peripheral edge of the absorber 4. As shown in FIG. 1, the back sheet 3 forms the outer shape of the diaper 1 in the unfolded state and the extended state. As the front surface sheet 2 and the back surface sheet 3, various types conventionally used for this kind of absorbent article can be used without particular limitation. For example, as the surface sheet 2, various non-woven fabrics, perforated films, and the like can be used. As the back sheet 3, a liquid-impermeable resin film, a laminate of the resin film and a non-woven fabric, or the like can be used. The back surface sheet 3 includes, for example, a form of a film sheet that is permeable to liquid resistance alone and a form in which an exterior sheet is laminated on a non-skin facing surface of the film sheet, that is, an outer surface side. It is a non-woven fabric. In the embodiment shown in FIG. 2, the back surface sheet 3 is composed of a poorly permeable film sheet 3a and an exterior sheet 3b made of a non-woven fabric laminated on the outer surface side thereof. Further, as the back surface sheet 3, a water-repellent and poorly permeable sheet, for example, a spunbond-melt blown-spanbond (SMS) non-woven fabric or the like can be used.

A thread-like elastic member 31 extends along the width direction Y between the front surface sheet 2 and the back surface sheet 3 at the waists of the ventral 1F and the dorsal 1R, that is, at the ends along the longitudinal direction X. It is fixed at. As a result, waist gathers are formed on the waist portion when the diaper 1 is worn due to the contraction of the elastic member 31.

Side sheets 34 are arranged on the left and right sides of the diaper 1 on the surface sheet 2 side along the longitudinal direction X, respectively. The side seat 34 has an inner edge portion along the longitudinal direction X and an outer edge portion located outside the inner edge portion in the width direction Y and along the longitudinal direction X. In the plan view shown in FIG. 1, the inner edge portion overlaps with a part of the absorber 4, and the outer edge portion extends outward in the width direction Y from the side edge along the longitudinal direction X of the absorber 4. It is joined to the back sheet 3.

A thread-like elastic member 32 is fixed in an extended state along the longitudinal direction X between the side seat 34 and the back seat 3 in the left and right leg portions arranged around the wearer's legs. As a result, a pair of leg gathers are formed on the leg portion when the diaper 1 is worn due to the contraction of the elastic member 32. Further, a thread-like elastic member 33 is fixed to the inner edge of the side seat 34 in an extended state along the longitudinal direction X, whereby when the diaper 1 is worn, the elastic member 33 contracts to at least 1M inseam. A leak-proof cuff 37 is formed on the diaper. The leak-proof cuffs 37 are arranged on both sides of the diaper 1 on the skin-facing surface in the width direction Y so as to extend in the longitudinal direction X. The front surface sheet 2, the back surface sheet 3, the absorber 4, the elastic members 31, 32, 33 and the side sheet 34 are joined to each other by a known joining means such as a hot melt type adhesive.

The diaper 1 is a so-called deployable disposable diaper, and as shown in FIG. 1, a pair of two fastening tapes 35, 35 are provided on both side edges of the dorsal portion 1R of the diaper 1 along the longitudinal direction X. There is. A fastening portion made of a male member of a mechanical hook-and-loop fastener is attached to the fastening tape 35.

A landing region 36 made of a female member of a mechanical hook-and-loop fastener is formed on the non-skin facing surface of the ventral side 1F of the diaper 1. In the landing region 36, a female member of a mechanical hook-and-loop fastener is attached to the non-skin facing surface of the back surface sheet 3 forming the non-skin facing surface on the ventral side 1F by a known joining means such as an adhesive or a heat seal. It is formed by joining and fixing, and the fastening portion of the fastening tape 35 can be detachably fastened.

The absorber 4 includes a liquid-retaining absorbent core 40, a skin-side core wrap sheet 41 that covers the skin-facing surface of the absorbent core 40, and a non-skin that covers the non-skin facing surface of the absorbent core 40. It is configured to include a side core wrap sheet 42. The absorbent core 40 and the core wrap sheets 41 and 42 are joined by a known joining means such as a hot melt type adhesive. The absorbent core 40 has a single-layer structure and has a long shape in the longitudinal direction X.

The absorbent core 40 of the present embodiment is a fiber aggregate obtained by stacking core-forming materials mainly composed of fiber materials. The fiber stacking of the core forming material can be carried out according to a conventional method using a known fiber stacking device. The term "mainly composed of fiber material" as used herein means that the content of the fiber material in the core forming material, that is, the absorbent core 40 is 40% by mass or more. The content of the fiber material is preferably 50% by mass or more with respect to the total mass of the absorbent core 40, and 100% by mass, that is, the absorbent core 40 may be composed of only the fiber material.

The skin-side core wrap sheet 41 and the non-skin-side core wrap sheet 42 are both mainly made of fiber material. The meaning of "mainly fiber material" here is as described above. The skin-side core wrap sheet 41 and the non-skin-side core wrap sheet 42 may be 1) one continuous sheet or 2) separate sheets. In the diaper 1 of the present embodiment, the above 1) is adopted. That is, in the diaper 1, one continuous core wrap sheet having a width of 2 times or more and 3 times or less the length of the absorbent core 40 in the width direction Y is adopted, and this one core wrap sheet is adopted. Covers the entire surface of the absorbent core 40 facing the skin as shown in FIG. 2, and extends outward in the width direction Y from both side edges of the absorbent core 40 along the longitudinal direction X, and the extending portion thereof. Is wound down below the absorbent core 40 to cover the entire non-skin facing surface of the absorbent core 40. Then, in this one core wrap sheet, the portion covering the skin facing surface of the absorbent core 40 is the skin side core wrap sheet 41, and the portion covering the non-skin facing surface of the absorbent core 40 is the non-skin side core wrap. Sheet 42.

In the case of 2) above, the length in the width direction Y, that is, the width may be the same or different between the skin side core wrap sheet 41 and the non-skin side core wrap sheet 42. If the widths of both sheets 41 and 42 are different, whichever is longer may be used. For example, the skin-side core wrap sheet 41 has the same width as the maximum width of the skin-facing surface of the absorbent core 40, that is, has a size capable of covering the entire skin-facing surface of the absorbent core 40, and is not. The skin-side core wrap sheet 42 can be wider than the sheet 41. The wide non-skin side core wrap sheet 42 covers the entire non-skin facing surface of the absorbent core 40, and extends outward in the width direction Y from both side edges along the longitudinal direction X of the absorbent core 40. The extending portion thereof may be rolled up on a skin-side core wrap sheet 41 arranged to face the skin-facing surface of the absorbent core 40, and may cover both side edges of the sheet 41 along the longitudinal direction X. ..

As the fiber material to be the constituent fiber of the absorbent core 40, a fiber material usually used for a liquid absorbing element in this kind of absorbent article can be used without particular limitation, and natural pulp such as wood pulp and non-wood pulp; Modified pulp such as cationized pulp and marcelified pulp; Regenerated cellulose fiber such as rayon; Synthetic fiber made of synthetic resin such as polyethylene resin and polyethylene terephthalate resin; Hydrophilization treatment of the synthetic fiber with a hydrophilic agent such as a surfactant One of these can be used alone or in combination of two or more. As the core wrap sheets 41 and 42, for example, paper, non-woven fabric and the like can be used, and as the constituent fibers thereof, the same constituent fibers as those of the absorbent core 40 can be used.

In another embodiment, the absorbent core 40 may contain a water-absorbing polymer in addition to or in place of the fibrous material described above. As the water-absorbent polymer, various hydrogel materials can be used. For example, a crosslinked product of a polymer or copolymer of an acrylic acid or an alkali metal salt of acrylic acid, a crosslinked product of polyacrylic acid and a salt thereof, a crosslinked product of a polyacrylate graft polymer, a crosslinked product of starch or carboxymethylated cellulose, starch-. Crosslinked product of hydrolysis product of acrylate graft copolymer, crosslinked product of vinyl alcohol-acrylate copolymer, crosslinked product of maleic anhydride grafted polyvinyl alcohol, crosslinked isobutylene-maleic anhydride copolymer, acetic acid A saponified product of a vinyl-acrylic acid ester copolymer or the like can be used.

As shown in FIGS. 2 (b) and 3 (3), the diaper 1 of the present embodiment is worn as an article to be used together with a separate absorbent pad 100 which is detachably arranged on the surface of the surface sheet 2 which is the surface facing the skin. It is what is used. The absorption pad 100 generally has a liquid-permeable front surface sheet 102 located on the skin-facing surface side, a back surface sheet 103 located on the non-skin-facing surface side, and a liquid-retaining absorption located between the two sheets 102 and 103. It has a body (not shown). The back sheet 103 may be liquid-impermeable or impermeable, or may be liquid-permeable. As the surface sheet 102 and the absorber used for the absorption pad 100, the same ones as the surface sheet 2 and the absorber 4 used for the diaper 1 can be used. Further, as the back sheet 103, the same one as the back sheet 3 of the diaper 1 can be used in the case of liquid impermeability or poor liquid permeability, and the same as the front sheet 2 in the case of liquid permeability. Can be used. The absorption pad 100 is arranged on the skin-facing surface of the diaper 1 so that the back surface sheet 103 located on the non-skin-facing surface side faces the front surface sheet 2 of the diaper 1. In the absorption pad 100, for example, an adhesive layer (not shown) is provided on the outer surface of the back surface sheet 103, and the adhesive layer allows the absorption pad 100 to be detachably fixed from the diaper 1. ing. The absorption pad 100 is arranged between the pair of leak-proof cuffs 37 so that the central region in the longitudinal direction thereof is located at the crotch portion 1M of the diaper 1.

FIG. 4 shows a plan view of the absorbent core 40. The absorbent core 40 shown in the figure is roughly classified into a central region 5 and a pair of side regions 6. The central region 5 includes the longitudinal center line CL that bisects the absorbent core 40 in the width direction Y, is located in the center of the width direction Y, and is approximately 1/2 of the maximum width of the absorbent core 40. Has a width of. The maximum width of the absorbent core 40 refers to a portion where the length of the absorbent core 40 in the width direction Y is the largest. For example, when the absorbent core has an hourglass shape, that is, the length of the crotch portion 1M in the width direction Y of the absorbent core 40 is shorter than the length of the ventral portion 1F or the dorsal portion 1R in the width direction Y. The length in the maximum width direction Y of the absorbent core in the ventral portion 1F or the dorsal portion 1R is the maximum width of the absorbent core 40. Each side region 6 is located on both sides in the width direction Y with respect to the central region 5, and has a width of approximately 1/4 with respect to the maximum width of the absorbent core 40. The central region 5 and the lateral region 6 are separated from each other by the lateral grooves 43 and 43 at least in the inseam 1M. Each side groove portion 43 has a basis weight lower than the basis weight of the central area 5 and the side area 6, or a portion having no basis weight or a basis weight lower than the basis weight of the central area 5 and the side area 6. Even if it is not, it is a portion which is thinned in thickness and has a groove shape by being partially compacted by embossing, and extends along the longitudinal direction X of the absorbent core 40. In the embodiment shown in FIG. 2, each side groove portion 43 is a portion of a through hole having no basis weight. In the absorbent core 40, the lateral groove 43 is formed in at least the inseam 1M of the diaper 1, and extends from the inseam 1M in the anterior-posterior direction in the longitudinal direction X to the ventral 1F and the dorsal 1R, respectively. It is preferable that it reaches up to. However, it is preferable that the lateral groove 43 does not reach the front and rear edges 40F and 40R of the absorbent core 40 in the longitudinal direction X, respectively. Therefore, the central region 5 and the lateral region 6 are separated from each other by the lateral groove portion 43 at least in the inseam 1M of the diaper 1, and the end region on the ventral side 1F side and the end on the dorsal side 1R side. In the local area, it is preferable that the central area 5 and the side area 6 are connected.

The absorbent core 40 has a central region 5 and a side region 6, and the central region 5 and the side region 6 are separated by the side groove portion 43, so that the diaper 1 cannot be completely absorbed by the absorbing pad 100. The urine and stool leaked to the stool are guided and diffused along the longitudinal direction X by the lateral groove 43. Further, since the side groove portion 43 acts as a bending guide portion of the absorbent core 40 when the diaper 1 is worn, the side region 6 is flexibly deformed to improve the fit with the wearer's body. Further, the side region 6 is flexibly deformed to improve the fit with the wearer's body, so that the inseam 1M of the central region 5 is narrowed toward the center in the width direction Y when worn, and the wearer. There is a gap between the body and diaper 1. Due to this, urine or stool leaked from the absorption pad 100 to the diaper 1 can be guided, held and diffused along the width direction Y into the gap between the wearer's body and the diaper 1. This effectively prevents the leakage of urine and stool from the diaper 1. From these viewpoints, the formation position of the lateral groove portion 43 is preferably 10% or more inward from the side edge 40S with respect to the maximum width of the absorbent core 40, more preferably 20% or more, still more preferably. It is 30% or more inward. Further, the formation position of the side groove portion 43 is preferably within 20% from the side edge 40S, more preferably within 28%, and even more preferably within 35% with respect to the maximum width of the absorbent core 40. ..

From the same viewpoint as described above, the ratio of the width of the central region to the maximum width of the absorbent core 40 is preferably 35% or more, more preferably 40% or more, and more preferably 45% or more. Is even more preferable. Further, it is preferably 65% or less, more preferably 60% or less, and further preferably 55% or less.

From the viewpoint of further enhancing the flexible deformability of each side region 6 when the diaper 1 is worn and the fit with the wearer's body, as shown in FIG. 2, the side region 6 is long on the non-skin facing surface side. It is advantageous to arrange the elastic member 38 extending in the direction X in the extended state. Specifically, it is preferable that the elastic member 38 is fixed in an extended state between the non-skin side core wrap sheet 42 and the back surface sheet 3. As a result, when the diaper 1 is worn, the elastic member 38 contracts so that the side region 6 successfully stands up toward the wearer's body.

From the viewpoint of more effectively preventing the leakage of urine and feces from the diaper 1, as shown in FIG. 2, the leak-proof cuff 37 described above is fixed when the position is focused on the fixed end 37a of the rising portion. It is advantageous that the side edge 40S of the absorbent core 40 is located outside the width direction Y rather than the position of the end 37a. By adopting this configuration, even if urine or stool leaks into the diaper 1 without being completely absorbed by the absorbent pad 100, it is possible to successfully absorb them in the lateral region 6 of the absorbent core 40. Become. From the viewpoint of further enhancing this advantageous effect, the position of the fixed end 37a of the leakage-proof cuff 37 is 0% or more inward from the side edge 40S with respect to the maximum width of the absorbent core 40. It is preferable, more preferably 0.5% or more, still more preferably 1% or more inward. The position of the fixed end 37a is preferably within 10% from the side edge 40S, more preferably within 9%, and even more preferably within 8% with respect to the maximum width of the absorbent core 40.

As shown in FIG. 4, a plurality of groove portions 61 are formed in each side region 6. These grooves 61 extend in a direction intersecting the longitudinal direction X of the absorbent core 40. Therefore, these groove portions 61 will be referred to as "intersection groove portions 61" in the following description. The cross groove portion 61 is partially embossed even if the basis weight is lower than the basis weight of the side area 6 or the portion having no basis weight or the basis weight is not lower than the basis weight of the side area 6. It is a part that is thinned and has a groove shape due to consolidation. In the present embodiment, the cross groove portion 61 is a portion of a through hole having no basis weight. The cross groove 61 is formed at least in the inseam 1M of the diaper 1, and more preferably also in the ventral 1F and / or the dorsal 1R. Each intersecting groove 61 intersects the longitudinal direction X of the absorbing core 40 at an angle such that their virtual extension lines L face the central portion of the absorbing core 40. The "central portion of the absorbent core 40" includes the position of the center of gravity of the two-dimensional figure defined in a plan view of the absorbent core 40, and the range of ± 280 mm in the longitudinal direction X from the center of gravity position and the width direction. It is a rectangular area in the range of Y ± 60 mm. In the embodiment shown in FIG. 4, the virtual extension lines L of all the intersecting groove portions 61 pass through the position of the center of gravity of the two-dimensional figure defined in a plan view of the absorbent core 40. The virtual extension line L may pass through the central portion of the absorbent core 40 described above. However, it is not necessary for all of the intersecting grooves 61 to pass through the central portion of the absorbent core 40 described above. From the viewpoint that the advantageous effect produced by providing the intersecting groove portion 61 is remarkably exhibited, it is preferable that all the intersecting groove portions 61 pass through the central portion of the above-mentioned absorbent core 40.

As shown in FIG. 4, in the plan view of the absorbent core 40, the cross groove portion 61 extends substantially radially from the position of the center of gravity of the two-dimensional figure defined in the plan view. Specifically, the angle θ formed by the longitudinal direction X of the absorbent core 40 and the intersecting groove portion 61 is approximately 90 degrees at the center position of the longitudinal direction X, and is directed from the center position toward the end portion of the longitudinal direction X. The angle θ gradually decreases. Therefore, the distance between two adjacent crossing grooves 61 along the longitudinal direction X (that is, the length along the longitudinal direction X) increases toward the side edge 40S of the absorbent core 40 along the width direction Y. There is.

By forming the above-mentioned cross groove portion 61 in the side region 6 of the absorbent core 40, urine and stool that could not be completely absorbed by the absorption pad 100 and leaked into the diaper 1 can be collected by the cross groove portion 61 in the center of the absorbent core 40. It is guided toward the part and diffuses. The leakage of urine or stool from the diaper 1 is more effectively prevented by the synergistic action of this diffusion and the diffusion of the leaked urine or stool in the longitudinal direction X by the lateral groove portion 43 described above. Moreover, since the cross groove portion 61 acts as a bending guide portion of the side region 6 when the diaper 1 is worn, the side region 6 is flexibly deformed to improve the fit with the wearer's body. Further, the side region 6 is flexibly deformed to improve the fit with the wearer's body, so that the inseam 1M of the central region 5 is narrowed toward the center in the width direction Y when worn, and the wearer. There is a gap between the body and diaper 1. Due to this, urine or stool leaked into the diaper 1 can be guided, held and diffused along the width direction Y into the gap between the wearer's body and the diaper 1.

As long as the leakage of urine and feces from the diaper 1 is effectively prevented, as shown in FIG. 5, the cross groove portion 61 has an end portion 61a on the inner side in the width direction Y connected to the side groove portion 43. You don't have to do it. On the other hand, in FIG. 4, each intersecting groove portion 61 has an end portion 61a on the inner side in the width direction Y connected to the side groove portion 43 described above. By this connection, diffusion in the longitudinal direction X by the lateral groove portion 43 and diffusion to the central portion of the absorbent core 40 by the cross groove portion 61 occur more effectively, and urine and feces leak from the diaper 1 further. It is prevented more effectively.

From the viewpoint of forming a cross groove 61 in the side region 6 of the absorbent core 40 to more effectively prevent leakage of urine and stool by the side region 6, the central region 5 of the absorbent core 40 Is preferably narrower than the width of the absorption pad 100 (see FIGS. 2B and 3). By setting the size relationship of the width in this way, when the diaper 1 is worn, the side groove portion 43 effectively acts as a bending guide portion, the side region 6 is flexibly deformed, and the diaper 1 is worn together with the absorption pad 100. The fit around the legs of the person is further improved. From the viewpoint of making this effect more remarkable, the width of the central region 5 is preferably 85% or less, more preferably 80% or less, and 75% or less with respect to the width of the absorption pad 100. It is more preferable to have. Further, it is preferably 25% or more, more preferably 30% or more, and even more preferably 35% or more. The "width of the absorbent pad 100" is the total width of the absorbent pad 100, that is, the entire width of the absorbent pad 100 including the front surface sheet and the back surface sheet, not the width of the absorbent core in the absorbent pad 100. ..

Next, another embodiment of the present invention will be described with reference to FIGS. 6 to 8. As for the points not particularly described with respect to these embodiments, the detailed description of the embodiments shown in FIGS. 1 to 5 described above will be appropriately applied. Further, in FIGS. 6 to 8, the same members as those in FIGS. 1 to 5 are designated by the same reference numerals.

In the embodiment shown in FIG. 6, the side region 6 has a second lateral groove 44 extending from the crotch portion 1M of the diaper 1 to the front and back in the longitudinal direction X. The front and rear ends of the second lateral groove 44 reach the ventral 1F and the dorsal 1R of the diaper 1. In FIG. 6, the positions of the front and rear ends of the second lateral groove portion 44 substantially coincide with the positions of the front and rear ends of the side groove portion 43. However, the positions of the front and rear ends of both groove portions 43 and 44 do not have to be the same. For example, the positions of the front and rear ends of the second lateral groove portion 44 are higher than those of the front and rear ends of the side groove portions 43. It may reach near the edge 40F, 40R of the absorbent core, and conversely, the position of the front-rear end of the side groove 43 is higher than the front-rear end of the second side groove 44, and the edge 40F, 40R of the absorbent core. It may have reached nearby. In any case, it is preferable that the front and rear ends of the second lateral groove 44 do not reach the edges 40F and 40R of the absorbent core 40.

The second lateral groove portion 44 is formed at a position that substantially bisects the side region 6 in the width direction Y. Specifically, the formation position of the second lateral groove 44 is preferably 10% or more inward from the side edge 40S with respect to the total width in the width direction Y of the side region 6, and more preferably 11. It is 3% or more, more preferably 12.5% or more inward. Further, the formation position of the second lateral groove portion 44 is preferably less than 100% from the side edge 40S with respect to the total width in the width direction Y of the side portion region 6, and more preferably within 99.5%, further. It is preferably within 99%. The second lateral groove 44 is embossed even if the basis weight is lower than the basis weight of the side area 6 or the area portion having no basis weight or the basis weight of the side area 6 is not lower than the basis weight. This is a region that is thinned and has a groove shape due to partial consolidation. The second lateral groove 44 shown in FIG. 6 is a region having no basis weight.

As shown in FIG. 6, in the side region 6, the second lateral groove 44 intersects the intersecting groove 61. The figure shows a state in which the second lateral groove 44 intersects all the intersecting grooves 61. A second lateral groove 44 is formed in the side region 6, and the second lateral groove 44 intersects the intersecting groove 61, so that the absorption pad 100 cannot completely absorb the diaper 1 when the diaper 1 is worn. Urine and stool leaked into the diaper 1 are guided and diffused along the longitudinal direction X by the second lateral groove 44 formed in the side region 6, and are diffused by the cross groove 61 to the central portion of the absorbent core 40. It is guided toward and diffuses. Further, as shown in FIG. 6, when the cross groove portion 61 is connected to the side groove portion 43, urine or stool diffused toward the central portion of the absorbent core 40 by the cross groove portion 61 is discharged to the side groove portion 43. Is guided along the longitudinal direction X and diffuses. As a result, according to the diaper 1 of the present embodiment, leakage of urine and stool from the diaper 1 can be prevented even more effectively.

In relation to the formation position of the second lateral groove 44, the rising fixed end 37a of the leak-proof cuff 37 described above is on the second side when the fixed end 37a is located on the absorbent core 40. It is preferable that the position is closer to the side edge 40S than the position where the square groove portion 44 is formed.

In order to achieve the above advantageous effect, it is advantageous that the second lateral groove 44 intersects all the intersecting grooves 61, but as long as such an effect is achieved, the second side It is not necessary that the square groove 44 intersects all the intersecting grooves 61.

From the viewpoint of more effectively preventing the leakage of urine and feces from the diaper 1, as shown in FIGS. 6 and 7, a central groove portion 45 may be further formed in the central region 5 of the absorbent core 40. The central groove portion 45 extends from the crotch portion 1M of the diaper 1 to the front and back in the longitudinal direction X. The front and rear ends of the central groove portion 45 reach the ventral side portion 1F and the dorsal side portion 1R of the diaper 1. In FIG. 6, the positions of the front and rear ends of the central groove portion 45 substantially coincide with the positions of the front and rear ends of the side groove portion 43 and the second side groove portion 44. However, the positions of the front and rear ends of these groove portions 43, 44, 45 do not have to be the same. For example, the positions of the front and rear ends of the central groove portion 45 are the front and rear ends of the side groove portion 43 and the second side groove portion 44. It may reach closer to the edge 40F, 40R of the absorbent core than the end, and conversely, the positions of the front and rear ends of the side groove 43 and the second side groove 44 are closer to the front and rear ends of the central groove 45. Also, it may reach near the edge 40F, 40R of the absorbent core. In any case, it is preferable that the front and rear ends of the central groove portion 45 do not reach the edge portions 40F and 40R of the absorbent core 40.

The central groove portion 45 is substantially formed at a position that substantially bisects the central region 5 in the width direction Y, that is, on the longitudinal center line CL passing through the central portion in the width direction. The central groove 45 shown in FIGS. 6 and 7 is a region having no basis weight, but has a basis weight lower than that of the central area 5 or a basis weight lower than that of the central area 5. Even if it is not present, the region may be formed in a groove shape by being thinned by being partially compacted by embossing. Since the central groove portion 45 is formed in the central region 5 of the absorbent core 40, the central groove portion 45 acts as a bending guide portion when the diaper 1 is worn, as shown in FIGS. 8 (a) and 8 (b). The left and right regions of the central region 5 sandwiching the central groove portion 45 are deformed toward the non-skin facing surface side, and the skin facing surface of the diaper 1 in the central region 5 is recessed toward the non-skin facing surface, and the recess 46 is formed. It is formed. Further, due to the formation of the recess 46, a gap is created between the wearer's body and the diaper 1, so that urine or stool leaked from the absorption pad 100 to the diaper 1 is between the diaper 1 and the diaper 1 along the width direction Y. Guided to the gap, held and diffused. Due to this, the recess 46 acts as a temporary reservoir for urine and stool. This further effectively prevents the leakage of urine and stool from the diaper 1. The recess 46 is formed even in the diaper of the embodiment in which the absorbent core 40 does not have the central groove 45, as long as the absorbent core 40 has the lateral groove 43. The formation of the central groove 45 in addition to the side groove 43 further promotes the formation of the recess 46.

From the viewpoint of successfully forming the recess 46 described above when the diaper 1 is worn, as shown in FIGS. 7 (a) and 7 (b), the central groove portion 45 is viewed in cross-sectional view in the thickness direction along the width direction Y. It is preferable that the width gradually decreases from the skin-facing surface to the non-skin-facing surface. As a result, the central groove portion 45 acts more effectively as a bending guide portion, and the left and right regions of the central region 5 sandwiching the central groove portion 45 are successfully deformed toward the non-skin facing surface side. From the viewpoint of causing this deformation more easily, as shown in FIG. 7B, the value of W1 / W2, which is the ratio of the width W1 on the skin facing surface side and the width W2 on the non-skin facing surface side in the central groove portion 45. Is preferably 1.1 or more, more preferably 1.5 or more, and even more preferably 2 or more. The value of W1 / W2 is preferably 10 or less, more preferably 9 or less, and even more preferably 8 or less.

Although the present invention has been described above based on the preferred embodiment, the present invention is not limited to the above embodiment. For example, in the embodiment shown in FIG. 6, the intersecting groove portion 61 may be formed so as not to be connected to the side groove portion 43 as shown in FIG.

Further, in the embodiment shown in FIGS. 6 and 7, it is not necessary to form the second lateral groove 44 in the side region 6 of the absorbent core 40.

Further, in the embodiment shown in FIG. 7, the width of the central groove portion 45 may be the same from the skin facing surface to the non-skin facing surface in the cross-sectional view of the absorbent core 40 in the thickness direction along the width direction Y. That is, the width W1 on the skin-facing surface side and the width W2 on the non-skin-facing surface side in the central groove portion 45 may be the same.

Further, in the diaper 1 of each of the above embodiments, the absorbent core 40 constituting the absorber 4 has a single-layer structure, but instead, a part or all of the absorbent core may have a multi-layer structure. ..

1 Disposable diapers (absorbent articles)
1F Disposable diaper ventral 1M Disposable diaper crotch 1R Disposable diaper dorsal 2 Front sheet 3 Back sheet 4 Absorber 40 Absorbent core 41 Skin side core wrap sheet 42 Non-skin side core wrap sheet 43 Side groove 44 Second lateral groove 45 Central groove 46 Recess 5 Central area 6 Side area 61 Crossed groove X Longitudinal direction Y Width direction

Claims (7)

An absorbent article that has a lower crotch and a ventral and dorsal parts that extend from the lower crotch to the front and back in the longitudinal direction, respectively, and is worn together with a separate absorbent pad that is detachably arranged on the skin-facing surface. There,
The absorbent article has an absorbent core and
The absorbent core comprises a central region and lateral regions located on both sides in the width direction thereof.
The central region and the lateral region are separated from each other at least in the inseam by a lateral groove extending in the longitudinal direction of the absorbent core.
The lateral region has a plurality of intersecting grooves extending in a direction intersecting the longitudinal direction of the absorbent core.
Each cross groove intersects the longitudinal direction of the absorbent core at an angle such that its virtual extension points toward the central portion of the absorbent core .
The central region is an absorbent article whose width is narrower than the width of the absorbent pad. The absorbent article according to claim 1, wherein the intersecting groove is connected to the side groove. The lateral region has a second lateral groove extending longitudinally back and forth from the inseam.
The absorbent article according to claim 1 or 2, wherein the second lateral groove intersects the intersecting groove. Leakage-proof cuffs extending in the longitudinal direction are arranged on both sides in the width direction on the skin-facing surface.
The absorbent article according to any one of claims 1 to 3, wherein the side edge of the absorbent core is located outward in the width direction from the fixed end of the leak-proof cuff. The absorbent article according to any one of claims 1 to 4, wherein an elastic member extending in the longitudinal direction is arranged in an extended state on the non-skin facing surface side of the side region. The central region has a central groove portion extending in the longitudinal direction from the inseam in the central portion in the width direction.
The absorbency according to any one of claims 1 to 5, wherein the width of the central groove portion gradually decreases from the skin-facing surface to the non-skin-facing surface in a cross-sectional view in the thickness direction along the width direction. Goods. An absorbent article having a lower crotch, a ventral portion and a dorsal portion extending from the inseam in the anterior-posterior direction in the longitudinal direction, and a separate absorbent pad removably arranged on the skin-facing surface of the absorbent article. It is a worn item that has and
The absorbent article has an absorbent core and
The absorbent core comprises a central region and lateral regions located on both sides in the width direction thereof.
The central region and the lateral region are separated from each other at least in the inseam by a lateral groove extending in the longitudinal direction of the absorbent core.
The lateral region has a plurality of intersecting grooves extending in a direction intersecting the longitudinal direction of the absorbent core.
Each cross groove intersects the longitudinal direction of the absorbent core at an angle such that its virtual extension points toward the central portion of the absorbent core.
The central region is a worn article whose width is narrower than the width of the absorbent pad.

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