JP7478629B2 - Absorbent articles - Google Patents

Description

The present invention relates to an absorbent article.

It is known that, in order to inhibit the growth of bacteria contained in excrement such as urine and feces, an antibacterial agent is contained in the components of absorbent articles such as diapers. For example, the present applicant previously proposed an antibacterial sheet manufactured by spraying an aqueous coating liquid containing a poorly water-soluble benzalkonium salt antibacterial agent and a basic compound and having a pH of 6.5 or higher onto a fiber sheet containing cellulose fibers (Patent Document 1). Such an antibacterial sheet is used as a covering sheet that covers the entire surface of an absorbent core.

The applicant has also previously proposed an absorbent article (Patent Document 2) that includes an absorbent body that includes an absorbent core and a core wrap sheet that covers the absorbent core and contains an antibacterial agent, and in which a lateral passage is formed in the absorbent core that runs continuously from one lateral end to the other.

JP 2015-089487 A Patent No. 6494889

In an absorbent containing an antibacterial agent, the antibacterial agent is eluted into absorbed body fluids such as urine, thereby suppressing the proliferation of bacteria in the body fluids. However, when the body fluid absorbed into the absorbent returns to the wearer's skin side, a phenomenon known as liquid return, the body fluid containing the antibacterial agent adheres to the wearer's skin due to the liquid return. Body fluids containing antibacterial agents can cause stickiness, and reducing the content of the antibacterial agent to suppress stickiness reduces the antibacterial properties of the absorbent. Patent Documents 1 and 2 do not disclose a technology for achieving both the suppression of liquid return of body fluids containing antibacterial agents and the antibacterial properties of the absorbent.

Therefore, the objective of the present invention is to provide an absorbent article that combines suppression of liquid return with antibacterial properties of the absorbent body.

The present invention provides an absorbent article comprising an absorbent body including an absorbent core and a core wrap sheet covering the skin-facing and non-skin-facing surfaces of the absorbent core, and having a vertical direction corresponding to the front-to-back direction of the wearer and a horizontal direction perpendicular to the vertical direction.
The absorbent core preferably has, on the skin-facing surface, recesses recessed toward the inside of the absorbent core and non-recesses where no such recesses exist.
The core wrap sheet preferably contains an antibacterial agent and has a core-facing surface facing the absorbent core, and a non-core-facing surface located on the opposite side to the core-facing surface.
It is preferable that the antibacterial agent is unevenly distributed on the core-facing side in the thickness direction of the core wrap sheet, at least on the skin-facing side of the absorbent core.
It is preferable that the core wrap sheet has a high antibacterial agent area in the lateral center on the non-skin facing side of the absorbent core, the antibacterial agent having a higher basis weight than both lateral sides.
In the absorbent body, it is preferable that an adhesive is disposed between the skin-facing surface of the absorbent core and the core wrap sheet, and the adhesive area in the non-recessed areas is larger than the adhesive area in the recessed areas.

The present invention provides an absorbent article that can simultaneously suppress liquid return and provide antibacterial properties for the absorbent body.

FIG. 1 is a perspective view showing a pants-type disposable diaper according to one embodiment of the present invention. FIG. 2 is a plan view showing the diaper shown in FIG. 1 in an unfolded and extended state. FIG. 3 is a cross-sectional view taken along line II-II shown in FIG. FIG. 4 is a cross-sectional view of the absorbent body shown in FIG. 3 taken along the lateral direction. 5(a) and (b) are enlarged plan views showing the pattern of adhesive applied to the recessed and non-recessed areas. 6(a) and (b) are enlarged cross-sectional views showing the core-facing surface side of the core wrap sheet according to the present invention. 7(a) and (b) are schematic diagrams showing an example of the distribution of an antibacterial agent on the core-facing surface of the core wrap sheet according to the present invention. FIG. 8 is a view corresponding to FIG. 4 and showing another embodiment of the absorbent body according to the present invention. FIG. 9 is a view corresponding to FIG. 4, showing still another embodiment of the absorbent body according to the present invention. FIG. 10 is a view corresponding to FIG. 4, showing still another embodiment of the absorbent body according to the present invention.

BEST MODE FOR CARRYING OUT THE DISCLOSURE Hereinafter, an absorbent article according to a preferred embodiment of the present invention will be described with reference to the drawings.
A disposable diaper 1 (hereinafter, also referred to as diaper 1) according to one embodiment of the present invention will be described with reference to Figs. 1 to 4. As shown in Fig. 1, the diaper 1 according to this embodiment is a pants-type disposable diaper, and includes an absorbent body 10 having an absorbent body 4, and an exterior body 2 arranged on the non-skin-facing side of the absorbent body 10. When worn, the diaper 1 has a ventral side portion A arranged on the ventral side of the wearer, and a dorsal side portion B arranged on the dorsal side of the wearer, and both ends of the ventral side portion A in the lateral direction Y and both ends of the dorsal side portion B in the lateral direction Y are joined to form a pair of side seal portions S, S. This joining also forms a waist opening 5 and a pair of leg openings 6. The diaper 1 has a crotch portion C arranged in the crotch portion of the wearer, located between the ventral side portion A and the dorsal side portion B.

The "skin-facing side" is the side of an absorbent article or its constituent member (e.g., absorbent body 4) that faces the wearer's skin when the absorbent article is worn. The "non-skin-facing side" is the side of an absorbent article or its constituent member that faces the side opposite the wearer's skin when the absorbent article is worn. In other words, the skin-facing side is the side that is relatively closer to the wearer's skin, and the non-skin-facing side is the side that is relatively farther from the wearer's skin. The "worn state" refers to the normal, proper wearing position, i.e., the state in which the correct wearing position of the absorbent article is maintained.

The diaper 1 has a vertical direction X corresponding to the front-rear direction of the wearer, and a horizontal direction Y perpendicular to the vertical direction X. The vertical direction X corresponds to a direction extending from the abdominal portion A of the diaper 1 through the crotch portion C to the dorsal portion B, and usually coincides with the longitudinal direction of the absorbent body 10. As shown in FIG. 2, the horizontal direction Y is a direction perpendicular to the vertical direction X when the diaper is in an unfolded and stretched state. As shown in FIG. 1, the horizontal direction Y coincides with the circumferential direction of the tubular waist portion D formed by connecting the abdominal portion A and the dorsal portion B. The "unfolded and stretched state" of the diaper 1 refers to a state in which the diaper 1 is unfolded by cutting the diaper 1 at the side seal portion S, and the elastic members of the unfolded diaper 1 are stretched to the designed dimensions (the same dimensions as when the diaper 1 is unfolded flat without any influence of the elastic members).
Since the vertical direction X is the up-down direction in the abdominal portion A and the back portion B when worn, the waist opening 5 side in each of the abdominal portion A and the back portion B is also referred to as the upper side or top, and the crotch portion C side is also referred to as the lower side or bottom.

The outer casing 2 of the diaper 1 of this embodiment has a ventral sheet member 2A forming a ventral portion A and a dorsal sheet member 2B forming a dorsal portion B, and the ventral sheet member 2A and the dorsal sheet member 2B are joined at a pair of side seal portions S, S (see Figure 1).
2, the absorbent body 10 is fixed across the ventral sheet member 2A and the dorsal sheet member 2B. The portions of the absorbent body 10 that overlap with the ventral sheet member 2A and the dorsal sheet member 2B are joined entirely or partially to both sheet members 2A, 2B by a known joining means such as an adhesive.

In the diaper 1 of this embodiment, the side seal portion S is formed by overlapping both ends of the lateral direction Y of the abdominal portion A with both ends of the lateral direction Y of the dorsal portion B, and subjecting the overlapping portions to a thermal embossing process. Instead of thermal embossing, ultrasonic sealing, laser, adhesives, etc. may also be used to form the side seal portion S.

The exterior body 2 may have a narrow region, for example a region of 10 mm or less, at both ends in the lateral direction Y of the ventral or dorsal sheet member where the ventral sheet member 2A and the dorsal sheet member 2B are not joined, and this case is also included in the case where the ventral portion A and the dorsal portion B are joined at both ends in the lateral direction Y.

As shown in FIG. 2, the diaper 1 of this embodiment is formed symmetrically with respect to the longitudinal center line CL extending in the longitudinal direction X. Therefore, in the following description, the symmetrical parts will be mainly described on the right side in FIG. 2, but the left side has a similar configuration except that it is symmetrical with the right side.

In the diaper 1 of this embodiment, the ventral sheet member 2A and the dorsal sheet member 2B constituting the outer body 2 each have, as shown in Figure 2, an outer layer sheet 22 on the non-skin-facing side which forms the outer surface of the diaper 1, an inner layer sheet 23 arranged on the skin-facing side of the outer layer sheet 22, and a plurality of elastic members 24 arranged in a stretched state between the outer layer sheet 22 and the inner layer sheet 23.
In the exterior body 2, the outer sheet 22 and the inner sheet 23 are joined at a plurality of joints (not shown) formed intermittently in the lateral direction Y. Such joints can be formed by known processing means such as thermal embossing, ultrasonic sealing, laser, etc.

A pair of sheets 16, 16 for forming a three-dimensional guard are arranged on both sides of the absorbent body 10. The sheet 16 for forming a three-dimensional guard has an elastic member 15 for forming a three-dimensional guard near the edge close to the longitudinal center line CL, and when the diaper is worn, the contraction force of the elastic member 15 causes a portion of the edge by a predetermined width to stand up and separate from the top sheet 12, forming a three-dimensional guard.

In the crotch portion C of the diaper 1, leg elastic members 17 extending in the vertical direction X are arranged in a stretched state on the outer side of the horizontal direction Y of the three-dimensional guard forming sheet 16. When the leg elastic members 17 contract, leg gathers are formed in the crotch portion C when the diaper 1 is worn, improving the fit around the legs of the wearer.

As shown in Fig. 3, the absorbent body 10 has a liquid-permeable top sheet 12, a liquid-impermeable back sheet 13, and an absorbent body 4 disposed therebetween. The liquid-impermeable property includes liquid-impermeable property and liquid-impermeable property.
The absorbent body 4 is used as a main liquid absorbing portion in absorbent articles such as diapers. As shown in Figures 3 and 4, the absorbent body 4 is configured to include an absorbent core 40 and a core wrap sheet 41 that covers the skin-facing surface and non-skin-facing surface of the absorbent core 40. The absorbent core 40 is configured, for example, from a laminate of hydrophilic fibers such as cellulose, a mixed laminate of the hydrophilic fibers and a water-absorbent polymer, a pile of water-absorbent polymer, a laminated structure in which a water-absorbent polymer is supported between two absorbent sheets, or the like.

4, the absorbent core 40 of this embodiment has, on its skin-facing surface, recesses 45 recessed toward the inside of the absorbent core 40, and non-recesses 48 where no recesses 45 are present. The recesses 45 of this embodiment are bottomed recesses that open to the skin-facing surface side of the absorbent core 40, and the bottoms of the recesses are formed by the absorbent core 40. The non-recesses 48 are located between the recesses 45, and the surfaces of the non-recesses 48 form the skin-facing surface of the absorbent core 40.
The recesses 45 in this embodiment may be non-stacking portions where the forming material of the absorbent core 40 is missing and the missing portions are empty, low-stacking portions where the forming material has a lower basis weight than the surrounding area, or densified portions where the forming material is densified. The non-stacking portions may be through holes that penetrate the absorbent core 40. The densified portions are usually portions where the forming material has a higher density and a smaller thickness than the surrounding area. The low-stacking portions are portions where the forming material has a basis weight of 50 g/ ^m2 or less.

In the present embodiment, the entire surface of the absorbent core 40, including the skin-facing surface and the non-skin-facing surface, is covered with one core wrap sheet 41. Specifically, one core wrap sheet 41 covers the skin-facing surface of the absorbent core 40, and the sheet extends outward in the horizontal direction Y from both side edges of the absorbent core 40 along the vertical direction X, and the extended portions are wrapped around the non-skin-facing surface of the absorbent core 40 to cover the non-skin-facing surface.
The core wrap sheet 41 of this embodiment has a sheet overlapping portion 49 in which both side portions along the longitudinal direction X are overlapped on the non-skin facing side of the absorbent core 40 (see FIG. 4).

The absorbent core 40 may be covered with a liquid-permeable core wrap sheet 41 at least on its skin-facing and non-skin-facing surfaces. For example, the core wrap sheet 41 may be composed of two sheets, one on each of the skin-facing and non-skin-facing surfaces of the absorbent core 40, to cover both of these surfaces. In this case, one of the two sheets may extend outward in the horizontal direction Y from both side edges of the absorbent core 40 along the vertical direction X, and the extended portion may be wrapped around the surface of the absorbent core 40 on which the other sheet is arranged, to cover a part of the surface on which the other sheet is arranged. In addition, the two sheets may be joined by a known joining means such as an adhesive at the overlapping portions.

In the absorbent body 4 , the core wrap sheet 41 contains an antibacterial agent 43 .
The antibacterial agent 43 may be any antibacterial agent used in absorbent articles such as diapers, without any particular limitation. Examples of the antibacterial agent include antibacterial metals, antibacterial metal carriers, and organic antibacterial agents. Examples of antibacterial metals include copper, silver, gold, lead, nickel, tin, zinc, iron, and zirconium. Examples of antibacterial metal carriers include water-insoluble or poorly water-soluble antibacterial agents such as silver zeolite, divinylbenzene-2-vinylpyridine-2-vinylpyridine silver copolymers (e.g., those described in JP-A-2006-307404), aluminum-silver-sodium nitrate silicate (e.g., those described in JP-A-2005-232654), composites of silicon dioxide, zinc oxide, and aluminum oxide carrying silver or zinc (specifically, metal-substituted cancrinite-like minerals carrying antibacterial metals), silver zirconium phosphate, and mixtures of silver and zinc zeolites. Examples of organic antibacterial agents include cationic surfactants such as quaternary alkylbenzylammonium salts. Examples of the cationic surfactant include tetraalkylammonium salts, trialkylbenzylammonium salts, monoalkyltrimethylammonium salts, dialkyldimethylammonium salts, trialkylmonomethylammonium salts, and monoalkyldimethylbenzylammonium salts.
The antibacterial agent 43 may be a plant extract having an antibacterial effect. Examples of the plant extract include oat extract, seaweed (Hibamata) extract, yuzu extract, witch hazel (witch hazel) extract, burnet extract, asarum extract, aloe extract, phellodendron bark extract, horsetail extract, chamomile extract, eucalyptus extract, peach leaf extract, and green tea extract.
The antibacterial agent 43 may contain one type of the above-mentioned components alone or two or more types in combination.

In the absorbent body 4, the core wrap sheet 41 has a core facing surface a facing the absorbent core 40, and a non-core facing surface b located on the opposite side to the core facing surface a (see FIG. 4).
At least on the skin-facing side of the absorbent core 40, the core wrap sheet 41 has the antibacterial agent 43 unevenly distributed on the core-facing surface a side in the thickness direction Z of the sheet 41. In other words, when the core wrap sheet 41 is divided into two equal parts in the thickness direction Z into a region on the core-facing surface a side and a region on the non-core-facing surface b side, at least on the skin-facing side of the absorbent core 40, the region on the core-facing surface a side has a higher concentration of the antibacterial agent 43, i.e., the amount of the antibacterial agent 43 is greater, than the region on the non-core-facing surface b side.
In the core wrap sheet 41 of this embodiment, the antibacterial agent 43 is unevenly distributed on the core-facing surface a side in the thickness direction Z of the sheet on both the skin-facing and non-skin-facing sides of the absorbent core 40 .

The core wrap sheet 41 in the absorbent body 4 of this embodiment is on the non-skin facing side of the absorbent core 40, and has a high antibacterial agent region R in the central part of the absorbent core 40 in the lateral direction Y, where the basis weight of the antibacterial agent 43 is higher than that of both side parts in the lateral direction Y. The central part of the absorbent core 40 in the lateral direction Y is the central part of the three parts when the entire length of the absorbent core 40 in the lateral direction Y is divided into three equal parts. The both side parts in the lateral direction Y of the absorbent core 40 are the parts on both sides of the lateral direction Y of the three parts, and sandwich the central part in the lateral direction Y.

In this embodiment, the high antibacterial agent region R is formed by a sheet overlap portion 49 of the core wrap sheet 41, and by overlapping the core wrap sheet 41, the basis weight of the antibacterial agent 43 is made higher than that of both lateral sides in the lateral direction.
The high antibacterial agent region R may be formed by partially increasing the amount of antibacterial agent 43 sprayed onto the core wrap sheet 41 .

In the absorbent body 4, adhesive is at least partially disposed between the absorbent core 40 and the core wrap sheet 41. Such an absorbent body 4 may be produced by covering an absorbent core 40 having an adhesive applied to its surface with a core wrap sheet 41, or by covering an absorbent core 40 with a core wrap sheet 41 having an adhesive applied to its surface.

In the absorbent body 4 of the present embodiment, an adhesive is disposed between the skin-facing surface of the absorbent core 40 and the core wrap sheet 41. More specifically, in each of the non-recessed portion 48 and the recessed portion 45, an adhesive is disposed between the absorbent core 40 and the core wrap sheet 41.
When the absorbent core 40 has a plurality of recesses 45 , adhesive may be provided in all of the recesses 45 , or adhesive may be provided in some of the recesses 45 .
When the absorbent core 40 has a plurality of non-recessed portions 48, adhesive may be provided in all of the non-recessed portions 48, or adhesive may be provided in some of the non-recessed portions 48.
Hereinafter, the region in the recess 45 where the adhesive is disposed to bond the absorbent core 40 and the core wrap sheet 41 together will be referred to as the "first adhesive region 55," and the region in the non-recess 48 where the adhesive is disposed to bond the absorbent core 40 and the core wrap sheet 41 together will be referred to as the "second adhesive region 58." That is, in the first adhesive region 55 and the second adhesive region 58, the absorbent core 40 and the core wrap sheet 41 are bonded together by the adhesive.
The first adhesive region 55 and the second adhesive region 58 do not include any region where adhesive is applied that does not contribute to bonding between the absorbent core 40 and the core wrap sheet 41 .

In this embodiment, the portion of the core wrap sheet 41 arranged on the skin-facing side of the absorbent core 40 fits into the recess 45 and is joined to the absorbent core 40 via the first adhesive region 55 formed at the bottom of the recess 45.
The portion of the core wrap sheet 41 disposed on the skin-facing side of the absorbent core 40 is joined to the absorbent core 40 via a second adhesive region 58 formed in the non-recessed portion 48 .
Figure 4 illustrates adhesive forming the first adhesive region 55 and the second adhesive region 58, but the core wrap sheet 41 may be joined to portions of the absorbent core 40 other than the skin-facing surface via adhesive.

The adhesive may be a water-insoluble one. Examples of the water-insoluble adhesive include those made of hydrophobic thermoplastic resins, such as various hot melt adhesives such as styrene-ethylene-butylene-styrene (SEBS)-based, styrene-isoprene-styrene (SIS)-based, styrene-butylene-styrene (SBS)-based, styrene-ethylene-propylene-styrene-based (SEPS), ethylene vinyl acetate (EVA), and polyvinyl alcohol (PVA).
The adhesive may use one type of the above-mentioned components alone or two or more types in combination.

The adhesive area in the non-recessed areas 48 of the absorbent core 40 is larger than the adhesive area in the recessed areas 45. That is, the area of the second adhesive areas 58 is larger than the area of the first adhesive areas 55. Therefore, in the absorbent body 4 of this embodiment, the total area of the second adhesive areas 58 is larger than the total area of the first adhesive areas 55.

When body fluids such as urine are excreted into the diaper 1 of this embodiment, the body fluids pass through the top sheet 12 and transfer to the absorbent body 4. On the skin-facing side of the absorbent body 4, the body fluids tend to transfer to the recesses 45, which have a smaller area (adhesive area) where adhesive is arranged than the non-recesses 48, and the body fluids tend to be stored in the recesses 45. In addition, since the area where adhesive is arranged in the recesses 45 is smaller than the non-recesses 48, the adhesive is less likely to inhibit the elution of the antibacterial agent in the recesses 45, and the antibacterial agent tends to transfer to the absorbent core 40. When the body fluid transfers to the absorbent core 40, the antibacterial agent 43 is unevenly distributed on the core-facing surface a side of the core wrap sheet 41 in the thickness direction, so that the body fluid is easily drawn into the absorbent core 40 due to the concentration gradient of the antibacterial agent 43. As a result, the antibacterial agent 43 present in the core wrap sheet 41 is quickly eluted by the body fluid, and the antibacterial agent 43 tends to transfer to the absorbent core 40. In this way, the antibacterial agent 43 contained in the core wrap sheet 41 can be sufficiently dissolved, and furthermore, since the core wrap sheet 41 has a high antibacterial agent region R, high antibacterial performance can be exhibited in the absorbent core 40 that has absorbed body fluids.
Furthermore, in the non-recessed portion 48 of the absorbent core 40, which is closer to the skin than the recessed portion 45, the area in which the water-insoluble adhesive is applied is larger than that of the recessed portion 45, so that the adhesive can effectively suppress the return of body fluids (liquid backflow) in the non-recessed portion 48.
Therefore, in the diaper 1 of the present embodiment, it is possible to suppress the return of the antibacterial agent-containing body fluids and to ensure the antibacterial properties of the absorbent body.

In order to further suppress liquid backflow, when the core wrap sheet 41 is divided into two equal parts in the thickness direction Z and divided into a region on the core facing surface a side and a region on the non-core facing surface b side, it is preferable that the basis weight of the antibacterial agent 43 in each of the region on the core facing surface a side and the region on the non-core facing surface b side is within the following range.
The basis weight of the antibacterial agent 43 in the region on the core-facing surface a side is preferably 101% or more, more preferably 150% or more, and also preferably 101% or more and 300% or less, more preferably 150% or more and 300% or less, relative to the basis weight of the antibacterial agent 43 in the region on the non-core-facing surface b side.
The basis weight of the antibacterial agent 43 in the region on the core facing surface a side is preferably 1 mg/ ^m2 or more, more preferably 2.5 mg/ ^m2 or more, more preferably 20 mg/ ^m2 or more, even more preferably 30 mg/ ^m2 or more, and is preferably 80 mg/ ^m2 or less, more preferably 50 mg/ ^m2 or less, and is preferably 1 mg/ ^m2 or more and 80 mg/ ^m2 or less, more preferably 2.5 mg/ ^m2 or more and 80 mg/ ^m2 or less, more preferably 20 mg/ ^m2 or more and 80 mg/ ^m2 or less, and even more preferably 30 mg/ ^m2 or more and 50 mg/ ^m2 or less.
The basis weight of the antibacterial agent 43 in the region on the non-core facing surface b side is preferably 0.3 mg/ ^m2 or more, more preferably 0.8 mg/ ^m2 or more, more preferably 8 mg/ ^m2 or more, even more preferably 10 mg/ ^m2 or more, and is preferably 55 mg/ ^m2 or less, more preferably 35 mg/ ^m2 or less, and is preferably 0.3 mg/ ^m2 or more and 55 mg/ ^m2 or less, more preferably 0.8 mg/ ^m2 or more and 55 mg/ ^m2 or less, more preferably 8 mg/ ^m2 or more and 55 mg/ ^m2 or less, and even more preferably 10 mg/ ^m2 or more and 35 mg/ ^m2 or less.
The basis weight of the antibacterial agent 43 in each of the region on the core facing surface a side and the region on the non-core facing surface b side is measured by the following method.

[Method for measuring basis weight of antibacterial agent]
A piece of ³⁰⁰ mm2 or more is cut out from the portion of the core wrap sheet 41 that covers the skin-facing side of the absorbent core. If the area of the piece is less than ³⁰⁰ mm2, pieces are cut out from multiple locations so that the total area is ³⁰⁰ mm2 or more.
Next, using XPS (X-ray photoelectron spectroscopy) or SEM-EDX (scanning electron microscope-energy dispersive X-ray spectroscopy), the peak intensity of the constituent elements of the antibacterial agent present on the core facing surface a side and the non-core facing surface b side of the slice, or the peak intensity of the peak characteristic of the antibacterial agent, is measured. By comparing the peak intensities of the core facing surface a and the non-core facing surface b, it is possible to confirm whether the basis weight of the antibacterial agent on the core facing surface a side is higher than that on the non-core facing surface b side. The amount of the antibacterial agent is determined by using a calibration curve based on the correlation between the amount of the antibacterial agent present on the core facing surface a side or the non-core facing surface b side and the peak intensity of the constituent elements or the peak intensity of the peak characteristic of the antibacterial agent.
The basis weight of the antibacterial agent in the entire core wrap sheet is determined by performing a multi-stage solvent extraction method using a non-polar solvent to a polar solvent on the slice, separating the antibacterial agent present in the slice, and obtaining a solution containing a single composition. The obtained solution is dried and solidified, and the chemical structure of the antibacterial agent is identified by a combination of 1H-NMR (nuclear magnetic resonance), IR (infrared spectroscopy), LC (liquid chromatography), GC (gas chromatography), MS (mass spectrometry), GPC (gel permeation chromatography), and fluorescent X-rays. In addition, a calibration curve is created by a known analytical means such as GC and LC using an agent having a specified chemical structure as a standard substance, and the antibacterial agent in the slice is quantified. Based on this quantification result, the mass of the antibacterial agent in the slice is determined. When multiple types of antibacterial agents are present in the slice, the sum of the masses of the various antibacterial agents is calculated, and the sum is regarded as the mass of the antibacterial agent in the slice. The mass of the antibacterial agent in the slice is then divided by the area of the slice to calculate the basis weight of the antibacterial agent.

The components to be measured, such as the core wrap sheet, are removed from the absorbent article by solidifying the hot melt adhesive with a cold spray or liquid nitrogen, and then carefully peeling it off from the other components of the absorbent article. Such a method is also common to other measurements in this specification.

From the viewpoint of drawing more body fluids toward the non-skin facing surface side of the absorbent core 40 and further suppressing liquid backflow, it is preferable that the recesses 45 and the high antibacterial agent region R overlap in a planar view (see FIG. 4). In this case, it is sufficient that the recesses 45 partially overlap the high antibacterial agent region R in a planar view. When the absorbent core 40 has a plurality of recesses 45 as in this embodiment, it is preferable that at least some of the recesses 45 overlap the high antibacterial agent region R.
From the same viewpoint as above, the area of the region where the recesses 45 and the high antibacterial agent region R overlap in a plan view of the absorbent body 4 is preferably 10% or more, more preferably 15% or more, and preferably 50% or less, and also preferably 10% or more and 50% or less, and more preferably 15% or more and 50% or less, of the area of the recesses 45. When the absorbent core 40 has a plurality of recesses 45, the "area of the recesses 45" means the area of the recesses 45 that overlap with the high antibacterial agent region R in a plan view, among the plurality of recesses 45.
From the same viewpoint as above, in a planar view of the absorbent body 4, the area of the region where the recess 45 and the high antibacterial agent region R overlap is preferably ⁵⁰⁰ mm2 or more, more preferably ⁷⁰⁰ mm2 or more, even more preferably ⁸⁰⁰ mm2 or more, and also preferably ³⁵⁰⁰ mm2 or less, more preferably ³⁰⁰⁰ mm2 or less, even more preferably ²⁵⁰⁰ mm2 or less, and also preferably 500 mm2 ^or more and 3500 ^mm2 or less, more preferably 700 mm2 or more and ^{3000 mm2} or less, even more preferably 800 mm2 ^or more and ²⁵⁰⁰ mm2 or less.

From the standpoint of further suppressing liquid backflow, it is preferable that width W2 (see FIG. 4) of high antibacterial agent region R, i.e., the length of high antibacterial agent region R in the lateral direction Y, be within the following range.
The width W2 (see Figure 4) of the high antibacterial agent region R is preferably 1% or more, more preferably 5% or more, and preferably 25% or less, more preferably 20% or less, and even more preferably 15% or less, of the overall width W (see Figure 4) of the absorbent core 40, and is preferably 1% or more and 25% or less, more preferably 5% or more and 20% or less, and even more preferably 5% or more and 15% or less.
The width W2 of the high antibacterial agent region R (see Figure 4) is preferably 1 mm or more, more preferably 5 mm or more, and is preferably 30 mm or less, more preferably 20 mm or less, even more preferably 15 mm or less, and is preferably 1 mm or more and 30 mm or less, more preferably 5 mm or more and 20 mm or less, and even more preferably 5 mm or more and 15 mm or less.
In the case where the width W2 of the high antibacterial agent region R varies in the vertical direction X, the "width W2 of the high antibacterial agent region R" is the maximum width of the high antibacterial agent region R.
In addition, when the overall width W of the absorbent core 40 varies in the longitudinal direction X, the “overall width W of the absorbent core 40 ” is the maximum width of the absorbent core 40 .

When the high antibacterial agent region R is formed by the sheet overlap portion 49 as in this embodiment, the region where the core wrap sheets 41 overlap on the non-skin facing side of the absorbent core 40 is defined as the high antibacterial agent region R. In this case, the area of the high antibacterial agent region R can be measured by copying the outline of the overlap portion (sheet overlap portion 49) of the core wrap sheets 41 onto paper or film, reading it with a scanner, and using area calculation software.
When the high antibacterial agent region R is formed by distributing the basis weight of the antibacterial agent 43 unevenly in a plan view, the area of the core wrap sheet 41 arranged on the non-skin-facing side of the absorbent core 40 where the basis weight of the antibacterial agent 43 is 50 mg/ ^m2 or more is defined as the high antibacterial agent region R. The basis weight of the antibacterial agent 43 is based on the amount of the antibacterial agent 43 sprayed on the core wrap sheet 41.

The planar shape of the recess 45 is not particularly limited, and may be a shape extending in the vertical direction X or a shape extending in the horizontal direction Y. From the viewpoint of further improving the diffusibility of bodily fluids, it is preferable that the recess 45 has a shape extending in the vertical direction X. In this case, the recess 45 may extend over the entire length of the absorbent core 40 in the vertical direction X, or may be shorter than the entire length in the vertical direction X.
From the same viewpoint as above, it is preferable that the width W1 of the recessed portion 45 and the width W3 of the non-recessed portion 48, that is, the length in the horizontal direction Y, be within the following range.
The width W1 of the recess 45 (see Figure 4) is preferably 1% or more, more preferably 3% or more, even more preferably 4% or more, and is preferably 25% or less, more preferably 20% or less, even more preferably 15% or less, and is preferably 1% or more and 25% or less, more preferably 3% or more and 20% or less, more preferably 4% or more and 20% or less, even more preferably 4% or more and 15% or less.
When there are multiple recesses 45, the sum of the widths W1 (see Figure 4) of the recesses 45 is preferably 10% or more, more preferably 12% or more, even more preferably 15% or more, and preferably 50% or less, more preferably 45% or less, even more preferably 40% or less, and preferably 10% or more and 50% or less, more preferably 10% or more and 45% or less, more preferably 12% or more and 40% or less, even more preferably 15% or more and 40% or less, of the total width W of the absorbent core 40.
The width W1 of the recess 45 (see FIG. 4) is preferably 5% or more, more preferably 10% or more, and even more preferably 15% or more, relative to the width W3 of the non-recess 48 (see FIG. 4), and is preferably 50% or less, more preferably 40% or less, and even more preferably 35% or less, and is preferably 5% or more and 50% or less, more preferably 10% or more and 40% or less, and even more preferably 15% or more and 35% or less.
The width W1 of the recess 45 (see FIG. 4) is preferably 3 mm or more, more preferably 10 mm or more, even more preferably 15 mm or more, and is preferably 90 mm or less, more preferably 60 mm or less, even more preferably 45 mm or less, and is preferably 3 mm or more and 90 mm or less, more preferably 10 mm or more and 60 mm or less, even more preferably 15 mm or more and 45 mm or less.
The width W3 of the non-recess 48 (see FIG. 4) is preferably 30 mm or more, more preferably 60 mm or more, even more preferably 75 mm or more, and preferably 105 mm or less, more preferably 100 mm or less, and even more preferably 90 mm, and is preferably 30 mm or more and 105 mm or less, more preferably 75 mm or more and 105 mm or less, more preferably 60 mm or more and 100 mm or less, and even more preferably 75 mm or more and 90 mm or less.
When the width W1 of the recess 45 or the width W3 of the non-recess 48 differs in the vertical direction X, each of the widths W1 and W3 is the maximum width of the recess 45 or the non-recess 48.

The first adhesive region 55 and the second adhesive region 58 are formed by applying an adhesive to the skin-facing surface of the absorbent core 40. The adhesive application pattern is not particularly limited as long as the area of the second adhesive region 58 is larger than the area of the first adhesive region 55. For example, in a plan view of the first adhesive region 55 or the second adhesive region 58, the adhesive may be continuously applied along the vertical direction X as shown in FIG. 5(a). In such a case, the application width of the adhesive is made different in the recessed portion 45 and the non-recessed portion 48. Alternatively, the adhesive may be applied in an intermittent pattern having an adhesive non-application portion such as a spiral pattern as shown in FIG. 5(b). Examples of such intermittent patterns include a spiral pattern, a stripe pattern, an omega shape, a dot pattern, and the like. When the application width per adhesive application device is limited, multiple application devices may be used according to the desired application width, or a device that sprays the binder in a mist may be used.
The adhesive may be continuously applied along the extending direction (vertical direction X) of the recessed portion 45 or the non-recessed portion 48 as shown in Fig. 5(a) , or the adhesive may be continuously applied from the recessed portion 45 to the non-recessed portion 48 in the horizontal direction Y as shown in Fig. 5(b) .

In order to achieve both suppression of liquid backflow and antibacterial properties, it is preferable that the areas of the first adhesive region 55 and the second adhesive region 58 are within the following ranges.
The area of the first adhesive region 55 is preferably 1% or more, more preferably 3% or more, and preferably 20% or less, more preferably 15% or less, and preferably 1% or more and 20% or less, more preferably 5% or more and 15% or less, of the area of the second adhesive region 58.
The area of the first adhesive region 55 is preferably ⁵⁰⁰ mm2 or more, more preferably ¹⁵⁰⁰ mm2 or more, and is preferably 11000 ^mm2 or less, more preferably 8000 ^mm2 or less, and is preferably 500 ^mm2 or more and 11000 ^mm2 or less, more preferably 1500 mm2 ^or more and ⁸⁰⁰⁰ mm2 or less.
The area of the second adhesive region 58 is, provided that it is larger than the area of the first adhesive region 55, preferably ¹⁵⁰⁰ mm2 or more, more preferably 2500 ^mm2 or more, and also preferably 15000 ^mm2 or less, more preferably 11000 ^mm2 or less, and also preferably 1500 mm2 ^or more and 15000 ^mm2 or less, more preferably 2500 mm2 ^or more and ¹¹⁰⁰⁰ mm2 or less.
When the absorbent body 4 has a plurality of first adhesive regions 55, the area of the first adhesive region 55 is defined as the average area of the plurality of first adhesive regions 55. When the absorbent body 4 has a plurality of second adhesive regions 58, the area of the second adhesive region 58 is defined as the average area of the plurality of second adhesive regions 58.

From the standpoint of further preventing body fluids absorbed by the absorbent core 40 from migrating to the skin-facing surface, the area of the skin-facing surface of the absorbent core 40 where adhesive is arranged is preferably 3% or more, more preferably 5% or more, and preferably 30% or less, more preferably 20% or less, even more preferably 15% or less, and preferably 3% or more and 30%, more preferably 3% or more and 20% or less, even more preferably 5% or more and 15% or less of the area of the skin-facing surface of the absorbent core 40.
The area on the skin-facing surface where the adhesive is applied is the total area of each of the first adhesive regions 55 and each of the second adhesive regions 58 described above.

The area where adhesive is applied, such as the first adhesive region 55 and the second adhesive region 58, can be determined, for example, by performing image analysis of the skin-facing surface of the absorbent core 40 after the core wrap sheet 41 has been peeled off.

From the viewpoint of allowing the antibacterial agent 43 to be more efficiently dissolved into body fluids and further improving antibacterial performance, it is preferable that the core wrap sheet has fine undulations on its core-facing surface a. An example of a core wrap sheet 41 having such a configuration is shown in Figures 6(a) and (b).
In the core wrap sheet 41a shown in Fig. 6(a), the core facing surface a has larger unevenness than the non-core facing surface b. Specifically, the non-core facing surface b is flat, whereas the core facing surface a has irregular unevenness. Such a core wrap sheet 41 is made of crepe paper, for example, and the irregular unevenness is formed by wrinkles in the crepe paper.
The core wrap sheet 41b shown in Fig. 6(b) has a raised surface formed by applying a raising treatment to the core-facing surface a. This raised surface, i.e., the core-facing surface a, has fine undulations formed by the raised fibers. The raising treatment can be performed by a known method such as rubbing the surface of the nonwoven fabric with a roller having an uneven surface.

The core wrap sheet 41b may have fine undulations over the entire core facing surface a, or may have fine undulations only in a portion of the core facing surface a.
From the same viewpoint as above, it is preferable that the core wrap sheet 41b has fine undulations at least in the portion of the core facing surface a that covers the skin facing surface of the absorbent core 40.

The core wrap sheet 41 may have a uniform or uneven distribution of the amount of antibacterial agent 43 when viewed in a plane of the core facing surface a or the non-core facing surface b, provided that the antibacterial agent 43 is biased toward the core facing surface a in the thickness direction Z.
For example, as shown in Figures 7(a) and (b), the core facing surface a of the core wrap sheet 41 may have different basis weights of the antibacterial agent 43 in the longitudinal direction X. Figures 7(a) and (b) are schematic diagrams showing the distribution of the antibacterial agent 43 on the core facing surface a, with the basis weight of the antibacterial agent 43 being indicated by different shades of black. That is, the higher the basis weight of the antibacterial agent 43, the darker the black is indicated.
7(a), when the core-facing surface a is viewed in plan, the basis weight of the antibacterial agent 43 changes linearly along the longitudinal direction X. More specifically, the basis weight of the antibacterial agent 43 increases linearly and gradually toward the inside of the longitudinal direction X.
7B, when the core-facing surface a of the core wrap sheet 41 is viewed in plan, the basis weight of the antibacterial agent 43 changes concentrically. More specifically, the basis weight of the antibacterial agent 43 gradually increases concentrically toward the inside in the longitudinal direction X.

The core wrap sheet 41 of this embodiment is obtained by spraying the antibacterial agent 43 onto the surface that will become the core-facing surface a while continuously conveying the continuous sheet of the core wrap sheet 41, as described below. With this method, the antibacterial agent 43 tends to be sprayed more in the center of the longitudinal direction X of the core wrap sheet 41, so that a core wrap sheet 41 is obtained in which the basis weight of the antibacterial agent 43 is high from the outside toward the center in the longitudinal direction X [see Figures 7(a) and (b)].

Figures 8 to 10 show other embodiments of the absorbent body according to the present invention. For the second to fourth embodiments described below, components that differ from the first embodiment shown in Figures 1 to 4 will be mainly described, and similar components will be given the same reference numerals and will not be described. For components that are not specifically described, the description of the first embodiment will be applied as appropriate.

8, the absorbent body 4a of the second embodiment is bonded to the skin-facing surface of the absorbent core 40, specifically, to the non-recessed portion 48, via an adhesive, without the core wrap sheet 41 entering the recessed portion 45. The adhesive forms a second adhesive region 58 in the non-recessed portion 48.
In the second embodiment, the first adhesive region 55 is not formed in the recess 45. With this configuration, the absorbent core 40 can have a further improved bodily fluid absorption performance.

The absorbent body 4b of the third embodiment shown in FIG. 9 has recesses 45b that are through-holes that penetrate the absorbent core 40. In such recesses 45b, no material that forms the absorbent core 40 is present.

An absorbent body 4 c of the fourth embodiment shown in FIG. 10 has a first adhesive region 55 and a second adhesive region 58 on the skin-facing surface of the absorbent core 40 .
In addition, in the absorbent body 4 c of the fourth embodiment, an adhesive 54 is provided on the non-skin facing surface of the absorbent core 40 .
In the absorbent body 4c of the fourth embodiment, the adhesive 50 is also disposed on the non-core facing surface b of the core wrap sheet 41. In this case, the adhesive 50 may be disposed on the entire non-core facing surface b of the core wrap sheet 41, or the adhesive 50 may be disposed on a part of the non-core facing surface b. With such a configuration, the inhibition of elution of the antibacterial agent 43 unevenly distributed on the core facing surface a side is further suppressed, while the antibacterial performance in the absorbent core 40 is further improved, and by disposing the adhesive 50 on the outer surface of the core wrap sheet 41, liquid return can be further suppressed.

In order to ensure the above-mentioned effects, it is preferable that the non-core facing surface b of the core wrap sheet 41 has a larger area covered with adhesive than the core facing surface a.
From the same viewpoint as above, the area where the adhesive is applied on the non-core facing surface b is preferably 101% or more, more preferably 105% or more, and also preferably 200% or less, more preferably 150% or less, and also preferably 101% or more and 200% or less, more preferably 105% or more and 150% or less, of the area where the adhesive is applied on the core facing surface a. When the adhesive is applied at multiple locations on the core facing surface a, the "area where the adhesive is applied on the core facing surface a" is the total area of the multiple locations. When the adhesive is applied at multiple locations on the non-core facing surface b, the "area where the adhesive is applied on the non-core facing surface b" is the total area of the multiple locations.

Regarding the materials forming each part of the diaper 1, the top sheet 12, back sheet 13, and other components can be made of materials similar to those conventionally used in this type of absorbent article, without any particular restrictions. For example, the top sheet 12 can be made of a liquid-permeable nonwoven fabric, a perforated film, or a laminate of these, while the back sheet 13 can be made of a resin film or a laminate of a resin film and a nonwoven fabric.

The absorbent body 4 can be an absorbent core made of a fiber aggregate of fibrous material such as pulp, or an absorbent core carrying a highly absorbent polymer, wrapped in a core wrap sheet made of tissue paper, water-permeable nonwoven fabric, or the like.
As the core wrap sheet 41, any liquid-permeable sheet conventionally used in absorbents in the art can be used without any particular restrictions. Examples of the core wrap sheet 41 include paper such as tissue paper and crepe paper, fiber sheets such as nonwoven fabrics (spunbond nonwoven fabrics, spunlace nonwoven fabrics such as acrylic and rayon, etc.), and perforated films. The core wrap sheet 41 is preferably liquid-permeable and hydrophilic, and is preferably one containing hydrophilic fibers.
The three-dimensional guard forming sheet 16 may be made of a stretchable film, a water-repellent nonwoven fabric, a woven fabric, or a laminated sheet of these.

As the sheet material constituting the outer layer sheet 22 and the inner layer sheet 23, various sheet materials conventionally used in this type of article can be used without particular restrictions, but nonwoven fabric is preferable. Examples of nonwoven fabric include single-layer nonwoven fabrics or laminated nonwoven fabrics of two or more layers, such as air-through nonwoven fabrics, heat-rolled nonwoven fabrics, spunlace nonwoven fabrics, spunbonded nonwoven fabrics, and meltblown nonwoven fabrics. Sheets in which these nonwoven fabrics are integrated with a film may also be used. A sheet made of nonwoven fabric, film, etc. can also be placed on the non-skin-facing side of the back sheet in the crotch portion C.

The elastic members 24, 15, 17 can be made from any of a variety of known elastic materials used in absorbent articles such as disposable diapers and sanitary napkins, without any particular restrictions. Examples of materials that can be used to make the elastic material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, elastic polyolefins, and polyurethanes. The elastic members can preferably be in the form of threads (e.g., rubber threads) or strings (e.g., flat rubber) with a rectangular, square, circular, or polygonal cross section, or multifilament threads.

Next, a method for manufacturing an absorbent body according to the present invention will be described by taking a method for manufacturing the absorbent body 4 of the first embodiment as an example.
When the absorbent core 40 has a recess formed of the above-mentioned non-stacking portion or low-stacking portion, the absorbent core can be manufactured in a conventional manner using a known fiber-stacking device equipped with a rotating drum. The fiber-stacking device typically includes a rotating drum having an accumulation recess formed on its outer circumferential surface, and a duct having an internal flow path for transporting a core-forming material (absorbent material) to the accumulation recess. While rotating the rotating drum around its rotation axis along the drum circumferential direction, the core-forming material transported on an air flow generated in the flow path by suction from the inside of the rotating drum is stacked in the accumulation recess. The stack formed in the accumulation recess by such a fiber-stacking process is the absorbent core 40. The non-stacking portion or low-stacking portion forming the recess 45 is a portion formed by intentionally hindering the stacking of the forming material in the fiber-stacking process. The absorbent core 40 having a non-stacking portion can be manufactured by using, as the accumulation recess, a portion in the accumulation recess that corresponds to the non-stacking portion and is non-ventilated. In addition, an absorbent core 40 having a low-stacking portion can be manufactured by using an accumulation recess in which the portion corresponding to the low-stacking portion at the bottom of the accumulation recess protrudes radially outward from the rotating drum compared to the peripheral portion.
In the absorbent core 40 obtained by the above method, the portions where no forming material is present are non-staple portions, and the portions where the forming material is present at a lower basis weight than the surrounding portions are low-staple portions.

The absorbent core 40 having the recess 45 formed from the above-mentioned compacted portion can have the recess formed by compaction means such as embossing.

The core wrap sheet 41 in which the antibacterial agent 43 is unevenly distributed on the core facing surface a side can be manufactured by spraying the antibacterial agent 43 on the surface that will become the core facing surface a of the core wrap sheet 41. For example, as described in Patent Document 1, there is a method of spraying a coating liquid in which the antibacterial agent is dispersed in a solvent onto the core wrap sheet 41. By such a method, it is possible to distribute the antibacterial agent 43 more on the core facing surface a side than on the non-core facing surface b side in the thickness direction Z of the core wrap sheet 41.
In the above method, the amount of antibacterial agent sprayed on the core wrap sheet 41 may be increased in some areas to form a high antibacterial agent region R.

The obtained absorbent core 40 is covered with the core wrap sheet 41. At this time, the surface on the side where the recess 45 is open is made to be the skin-facing surface. When the recess 45 is a through hole, the absorbent core 40 has a surface on either side of both openings of the through hole as the skin-facing surface.
When the core wrap sheet 41 is made of a single sheet as in the first embodiment, the surface of the absorbent core 40 may be covered with the core wrap sheet 41 so as to form a sheet overlapping portion 49 where the core wrap sheets 41 are overlapped with each other. In this case, the sheet overlapping portion 49 forms a high antibacterial agent region R.

While the present invention has been described based on the preferred embodiments thereof, the present invention is not limited to the above-described embodiments and can be modified as appropriate.
For example, the absorbent article of the present invention is not limited to pants-type disposable diapers, but may be flat-type disposable diapers, sanitary napkins, incontinence pads, and the like.
The above-described embodiments may also be combined.
For example, the absorbent core 40 may have a recess 45 formed of a through hole, and an adhesive may be applied to the non-core facing surface b of the core wrap sheet 41 .

In relation to the above-mentioned embodiment, the present invention further discloses the following absorbent article.
＜1＞
An absorbent article comprising an absorbent body including an absorbent core and a core wrap sheet covering a skin-facing surface and a non-skin-facing surface of the absorbent core, the absorbent article having a longitudinal direction corresponding to the front-to-rear direction of a wearer and a lateral direction perpendicular to the longitudinal direction,
the absorbent core has, on the skin-facing surface, a recess recessed toward the inside of the absorbent core and a non-recess where no such recess exists;
The core wrap sheet contains an antibacterial agent and has a core-facing surface facing the absorbent core and a non-core-facing surface located on the opposite side to the core-facing surface;
The core wrap sheet has, at least on the skin-facing side of the absorbent core, the antibacterial agent unevenly distributed on the core-facing side in the thickness direction of the core wrap sheet, and on the non-skin-facing side of the absorbent core, a high antibacterial agent region is provided in the central portion in the lateral direction, the basis weight of the antibacterial agent being higher than that of both sides in the lateral direction,
An absorbent article, wherein in the absorbent body, an adhesive is arranged between the skin-facing surface of the absorbent core and the core wrap sheet, and the adhesive area in the non-recessed areas is larger than the adhesive area in the recessed areas.

＜2＞
The absorbent article described in <1>, wherein the basis weight of the antibacterial agent in the core facing surface region is 101% or more and 300% or less, preferably 150% or more and 300% or less, of the basis weight of the antibacterial agent in the non-core facing surface region.
＜3＞
The absorbent article described in <2>, wherein the basis weight of the antibacterial agent in the region on the core facing surface side is ¹ mg/ ^m2 or more and 80 mg/m2 or less, preferably 2.5 mg/ ^m2 or more and 80 mg/ ^m2 or less, more preferably 20 mg/ ^m2 or more and 80 mg/ ^m2 or less, and even more preferably 30 mg/ ^m2 or more and 50 mg/ ^m2 or less.
＜4＞
The absorbent article according to <2> or <3>, wherein the basis weight of the antibacterial agent in the region on the non-core facing surface side is 0.3 mg/m ² or more and 55 mg/m ² or less, preferably 0.8 mg/m ² or more and 55 mg/m ² or less, more preferably 8 mg/m ² or more and 55 mg/m ² or less, and even more preferably 10 mg/m ² or more and 35 mg/m ² or less.
＜5＞
The absorbent article described in <1> above, wherein the core facing surface of the core wrap sheet has greater irregularities than the non-core facing surface.
＜6＞
The absorbent article according to any one of <1> to <5>, wherein the core-facing surface of the core wrap sheet is subjected to a nap-raising treatment.
＜７＞
The absorbent body has the adhesive also disposed on the non-core facing surface of the core wrap sheet,
The absorbent article according to any one of <1> to <6>, wherein the non-core facing surface has an area where the adhesive is provided that is larger than an area where the adhesive is provided on the core facing surface.
＜8＞
The absorbent article described in <7>, wherein the area of the non-core facing surface of the absorbent where the adhesive is applied is 101% or more and 200% or less, more preferably 105% or more and 150% or less, of the area of the core facing surface of the absorbent where the adhesive is applied.
＜9＞
The absorbent article described in any one of <1> to <8>, wherein the core-facing surface of the core wrap sheet has a basis weight of the antibacterial agent that varies in the longitudinal direction.
＜10＞
The absorbent article according to any one of <1> to <9>, wherein the recess and the high antibacterial agent region overlap in a plan view.

<11>
The absorbent article according to <10> above, wherein the area of the region where the recess and the high antibacterial agent region overlap is 10% or more and 50% or less, preferably 15% or more and 50% or less, of the area of the recess.
＜12＞
The absorbent article according to <10> or ^<11> , wherein the area of the region where the recess and the high antibacterial agent region overlap is 500 mm2 or ^more and 3500 ^mm2 or less, more preferably 700 mm2 ^or more and ³⁰⁰⁰ mm2 or less, and even more preferably 800 mm2 ^or more and 2500 mm2 or less.
＜13＞
The absorbent article according to any one of <1> to <12>, wherein the width in the lateral direction of the high antibacterial agent region is 1% or more and 25% or less, more preferably 5% or more and 20% or less, and even more preferably 5% or more and 15% or less, of the total width in the lateral direction of the absorbent core.
＜14＞
The absorbent article according to any one of <1> to <13>, wherein the width of the recess in the lateral direction is 1% or more and 25% or less, preferably 3% or more and 20% or less, more preferably 4% or more and 20% or less, and even more preferably 4% or more and 15% or less, relative to the total width of the absorbent core in the lateral direction.
＜15＞
The absorbent article according to any one of <1> to <14>, wherein the width of the recess in the lateral direction is 5% to 50%, preferably 10% to 40%, more preferably 15% to 35% of the width of the non-recess in the lateral direction.
＜16＞
The absorbent article according to any one of <1> to <15>, wherein the area of the absorbent core where the adhesive is arranged on the skin-facing surface is 3% or more and 30% or less, preferably 3% or more and 20% or less, more preferably 5% or more and 15% or less, of the area of the skin-facing surface.
＜１７＞
An absorbent article described in any one of <1> to <16>, having a first adhesive region in which adhesive is arranged to bond the absorbent core and the core wrap sheet in the recess, and a second adhesive region in which adhesive is arranged to bond the absorbent core and the core wrap sheet in the non-recess.
＜18＞
The absorbent article according to <17>, wherein the area of the first adhesive region is 1% or more and 20% or less, preferably 5% or more and 15% or less, of the area of the second adhesive region.
＜19＞
The absorbent article according to any one of <1> to <18>, wherein the antibacterial agent contains a cationic surfactant.

＜20＞
The absorbent article according to any one of <1> to <19>, wherein the antibacterial agent contains a plant extract.
＜21＞
The absorbent article according to any one of <1> to <20>, wherein the adhesive is water-insoluble.

REFERENCE SIGNS LIST 1 diaper 2 exterior body 4 absorbent body 10 absorbent main body 12 top sheet 13 back sheet 16 three-dimensional guard forming sheet 40 absorbent core 41 core wrap sheet 43 antibacterial agent 45 recess 48 non-recess 49 sheet overlapping portion 55 first adhesive region 58 second adhesive region a core facing surface b non-core facing surface R high antibacterial agent region X longitudinal direction Y transverse direction Z thickness direction

Claims (8)

An absorbent article comprising an absorbent body including an absorbent core and a core wrap sheet covering a skin-facing surface and a non-skin-facing surface of the absorbent core, the absorbent article having a longitudinal direction corresponding to the front-to-rear direction of a wearer and a lateral direction perpendicular to the longitudinal direction,
the absorbent core has, on the skin-facing surface, a recess recessed toward the inside of the absorbent core and a non-recess where no such recess exists;
The core wrap sheet contains an antibacterial agent and has a core-facing surface facing the absorbent core and a non-core-facing surface located on the opposite side to the core-facing surface;
The core wrap sheet has, at least on the skin-facing side of the absorbent core, the antibacterial agent unevenly distributed on the core-facing side in the thickness direction of the core wrap sheet, and on the non-skin-facing side of the absorbent core, a high antibacterial agent region in the central portion in the lateral direction, in which the basis weight of the antibacterial agent is higher than that of both sides in the lateral direction,
In the absorbent body, an adhesive is disposed between the skin-facing surface of the absorbent core and the core wrap sheet, and an adhesive area in the non-recessed portion is larger than an adhesive area in the recessed portion,
The absorbent body has the adhesive also disposed on the non-core facing surface of the core wrap sheet,
An absorbent article, wherein the non-core facing surface has a larger area covered with the adhesive than the core facing surface. The absorbent article according to claim 1, wherein the core-facing surface of the core wrap sheet has greater irregularities than the non-core-facing surface. The absorbent article according to claim 1 or 2, wherein the core-facing surface of the core wrap sheet is brushed. The absorbent article according to claim 1 , wherein the antibacterial agent has a basis weight that varies in the longitudinal direction on the core-facing surface of the core wrap sheet. The absorbent article according to claim 1 , wherein the recess and the high antibacterial agent region overlap each other in a plan view. The absorbent article according to any one of claims 1 to 5 , wherein an area of the absorbent core where the adhesive is arranged on the skin-facing surface is 3% or more and 30% or less of an area of the skin-facing surface. The absorbent article according to any one of claims 1 to 6 , wherein the antibacterial agent comprises a cationic surfactant. The absorbent article according to any one of claims 1 to 7 , wherein the antibacterial agent comprises a plant extract.

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