CN111182872B

CN111182872B - Absorbent article

Info

Publication number: CN111182872B
Application number: CN201880064790.6A
Authority: CN
Inventors: 加藤幸江; 山本耕裕; 广瀬祐一
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2017-12-14
Filing date: 2018-12-04
Publication date: 2022-02-18
Anticipated expiration: 2038-12-04
Also published as: JP2019103710A; CN111182872A; JP6578342B2; WO2019116954A1

Abstract

The absorbent article of the present invention includes an absorbent core. The absorbent core has: a front core portion and a rear core portion opposed to each other in a longitudinal direction; and an intermediate core portion located between the front core portion and the rear core portion and narrower than widths of the front core portion and the rear core portion. The intermediate core includes: a high grammage portion having a higher grammage than the front core portion and the rear core portion and formed at a widthwise center; and a low grammage portion having a lower grammage than the front core portion and the rear core portion and formed around the high grammage portion.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article such as a sanitary napkin.

Background

When the sanitary napkin is used in a sleeping position, a gap is formed between the sanitary napkin and the wearer, and thus liquid tends to leak to the rear. In view of this, in an absorbent article such as a sanitary napkin, there is known a technique of providing an absorbent core having a protrusion in a central region in a width direction in order to improve the fit to a wearer (see patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2014-104093

Disclosure of Invention

Technical problem to be solved by the invention

An absorbent article according to one embodiment of the present invention includes an absorbent core.

The absorbent core has: a front core portion and a rear core portion opposed to each other in a longitudinal direction; and an intermediate core portion located between the front core portion and the rear core portion and narrower than widths of the front core portion and the rear core portion.

The intermediate core includes: a high grammage portion having a higher grammage than the front core portion and the rear core portion and formed at a widthwise center; and a low grammage portion having a lower grammage than the front core portion and the rear core portion and formed around the high grammage portion.

Drawings

Fig. 1 is a perspective view showing an absorbent article according to embodiment 1 of the present invention.

Fig. 2 is a plan view of the absorbent article.

Fig. 3 is a sectional view taken along line III-III of fig. 2.

Fig. 4 is a plan view showing the absorbent core of the absorbent article.

Fig. 5 is a schematic side view showing the absorbent core described above.

Fig. 6 is a plan view schematically showing a configuration example of the longitudinal end portion of the high grammage portion of the absorbent core.

Fig. 7 is an enlarged plan view showing the tapered portion of the absorbent core.

Fig. 8 is a plan view showing the structure of the compressed groove portion formed in the absorbent core.

Fig. 9 is a plan view schematically showing an absorbent core of an absorbent article according to another embodiment of the present invention.

Fig. 10 is a plan view schematically showing an absorbent core of an absorbent article according to another embodiment of the present invention.

Detailed Description

Generally, the width of a crotch of a human is narrower than the width of a sanitary napkin. Therefore, a force directed inward in the width direction is applied to the intermediate portion of the sanitary napkin that faces the excretory region of the wearer, and compression deformation is likely to occur in the width direction. Further, with such compression deformation, the front portion located forward of the intermediate portion and the rear portion located rearward are also likely to be deformed.

When the front portion and the rear portion of the sanitary napkin are deformed in this manner, a gap is formed between the sanitary napkin and the wearer, and liquid substances such as menstrual blood excreted from the excretory region of the wearer easily flow forward and rearward. Therefore, liquid leakage may occur at the front portion and the rear portion.

The present invention relates to an absorbent article capable of preventing liquid leakage at a front portion and a rear portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

< embodiment 1>

[ integral Structure of sanitary napkin ]

Fig. 1 is a perspective view showing an absorbent article 1 according to an embodiment of the present invention. In fig. 1, the X-axis direction corresponds to the front-rear direction, the Y-axis direction corresponds to the left-right direction, and the Z-axis direction corresponds to the up-down direction.

Fig. 2 is a plan view of the absorbent article 1, and shows a state in which the absorbent article 1 shown in fig. 1 is stretched along the XY plane. In the absorbent article 1 shown in fig. 2, the X-axis direction corresponds to the longitudinal direction, the Y-axis direction corresponds to the width direction, and the Z-axis direction corresponds to the thickness direction. The absorbent article 1 will be described below in the state shown in fig. 2.

The absorbent article 1 of the present embodiment is configured as a sanitary napkin, hereinafter referred to as a sanitary napkin 1.

The sanitary napkin 1 of the present embodiment may be used at bedtime, and may have a length of 30cm or more in the longitudinal direction, for example.

The sanitary napkin 1 in this embodiment includes a main body M, a pair of flaps W, a pair of side cuffs G, and a pair of rear flaps F.

The main body M extends in the longitudinal direction and is fixed to the inner surface (the surface to be worn) of the underwear of the wearer when worn. The main body M has an absorbent body described later and has a function of absorbing a liquid material (hereinafter, also referred to as "liquid") such as menstrual blood of a wearer.

The main body M has a front region M1, a middle region M2, and a rear region M3 defined in the longitudinal direction.

The front region M1 is a region disposed in front of the middle region M2 (on the abdominal side of the wearer), and is configured to face the front of the excretory region of the wearer when worn.

The intermediate region M2 is configured to face the excretion region of the wearer when worn. The intermediate region M2 may be located forward of the main body M as shown in the drawing, or may be located in the center of the main body M.

The rear region M3 is a region disposed rearward of the intermediate region M2 (on the back side of the wearer), and is configured to face rearward of the excretory region of the wearer when worn.

The wing portions W are configured to greatly protrude outward in the width direction from the intermediate region M2. In other words, the middle region M2 exists in a range where the wing portion W exists in the longitudinal direction.

The side apron G is disposed on the widthwise periphery of the body M including the intermediate region M2 so as to extend in the longitudinal direction.

The rear wing F is configured to bulge outward in the width direction from the rear region M3.

The sanitary napkin 1 may not have at least one of the wing portions W, the side cuffs G, and the rear wing portions F.

[ Structure of each part of sanitary napkin ]

Fig. 3 is a sectional view taken along line III-III of fig. 2.

The sanitary napkin 1 includes an absorbent body 11, a front sheet 12, a back sheet 13, a pair of side sheets 14, an adhesive portion 15, and a compressed groove portion 16. In the main body M, the sanitary napkin 1 has a structure in which a back sheet 13, an absorbent body 11, and a front sheet 12 are laminated.

The absorber 11 has a longitudinal direction in the X-axis direction and is disposed in the center portion in the thickness direction of the sanitary napkin 1. The absorbent body 11 absorbs liquid from the surface on the topsheet 12 side, and diffuses and retains the liquid therein.

The absorbent body 11 has an absorbent core 20 and a core-spun sheet 30.

The absorbent core 20 has a function of absorbing and retaining liquid. The absorbent core 20 may be formed of a fiber aggregate made of hydrophilic fibers such as wood pulp fibers, or may have a structure in which a water-absorbent polymer is held by the fiber aggregate. The detailed structure of the absorbent core 20 will be described later.

The core sheet 30 covers the absorbent core 20, and has a function of, for example, maintaining the shape of the absorbent core 20. The core sheet 30 is formed of, for example, thin and soft paper such as tissue paper, liquid-permeable nonwoven fabric, or the like.

The top sheet 12 is a liquid-permeable sheet and is disposed on the absorbent body 11. The front sheet 12 constitutes an outer surface of the sanitary napkin 1 in the main body M above in the thickness direction.

The back sheet 13 is disposed opposite to the front sheet 12 in the thickness direction with the absorber 11 interposed therebetween. The back sheet 13 constitutes an outer surface of the sanitary napkin 1 in a thickness direction downward. The back sheet 13 is joined to the front sheet 12 and the side sheet 14 at the peripheral edge portion thereof by, for example, an adhesive, heat sealing, or the like.

The pair of side sheets 14 face each other in the width direction through the front sheet 12, and are disposed on the width direction peripheral edge of the sanitary napkin 1. The side panel G includes an elastic member 143 such as a linear elastic member disposed in the longitudinal direction between the folded portion 141 of the side panel 14 folded back on the outer side in the width direction and the front panel joining portion 142, and is configured to be able to rise toward the skin surface side. The side sheet 14 is joined to the main surface 12a at a front sheet joining portion 142 serving as a base of the side apron G using an adhesive B.

The attachment portion 15 is configured to fix the sanitary napkin 1 to the undergarment, and is formed on the outer surface of the back sheet 13. The attachment portion 15 includes, for example: a main body attaching part 151 provided in the main body M; a wing portion attaching portion 152 provided on the wing portion W; and a rear wing attachment portion (not shown) provided on the rear wing F.

The pair of compressed groove portions 16 are formed as linear grooves formed by compression processing of the absorbent body 11 and the topsheet 12. The pair of compression groove portions 16 are formed in the topsheet 12, the core sheet 30, and the absorbent core 20, extend in the longitudinal direction, and are opposed to each other in the width direction.

The pair of compression groove portions 16 may be connected to each other at the front end portion and the rear end portion so as to surround the body M. The detailed structure of the compressed groove portion 16 will be described later.

[ planar shape of absorbent core ]

Fig. 4 is a plan view showing the absorbent core 20.

The absorbent core 20 has: a front core portion 21 and a rear core portion 23 opposed to each other in a longitudinal direction; and an intermediate core 22 located between the front core 21 and the rear core 23. The front core 21 is located in the front region M1, the middle core 22 is located in the middle region M2, and the rear core 23 is located in the rear region M3. The absorbent core 20 has a planar shape that is bilaterally symmetric in the width direction.

Widths D1, D2, D3, which are the widthwise dimensions of the front core portion 21, the intermediate core portion 22, and the rear core portion 23, are shown in fig. 4. The intermediate core 22 has a width D2 narrower than the widths D1, D3 of the front and

rear core portions

21, 23. In other words, the absorbent core 20 has a planar shape that narrows in the width direction at the intermediate core portion 22.

The absorbent core 20 has the intermediate core portion 22 having a narrow width, whereby, in the case where the legs of the wearer are closed and the crotch width is narrowed, the external force applied to the inner side in the width direction of the intermediate core portion 22 can be reduced.

The widths D1, D3 of the front core portion 21 and the rear core portion 23 are preferably 60mm or more and 100mm or less, and more preferably 70mm or more and 90mm or less.

The width D2 of the intermediate core 22 is preferably 40mm or more and 75mm or less, and more preferably 50mm or more and 70mm or less. This makes it possible to cope with a shift in the wearing position in the width direction and to give a feeling of comfort to the wearer while being less susceptible to an external force applied to the inside in the width direction by the legs of the wearer.

The length of the intermediate core 22 in the longitudinal direction is preferably 60mm or more and 170mm or less, and more preferably 80mm or more and 160mm or less. This enables the center core 22 to face the excretory region of the wearer even when the wearing position in the longitudinal direction is shifted.

In the present embodiment, the width D1 of the front core portion 21 is the same as the width D3 of the rear core portion 23. However, the width D1 of the front core portion 21 may be different from the width D3 of the rear core portion 23. The widths of the front core portion 21, the intermediate core portion 22, and the rear core portion 23 may be unequal. In this case, the maximum width dimensions of the front core portion 21 and the rear core portion 23 in the width direction can be set to the widths D1 and D3, and the minimum width dimension of the intermediate core portion 22 in the width direction can be set to D2.

In the present embodiment, the front core portion 21, the intermediate core portion 22, and the rear core portion 23 are divided into blocks by the low grammage vertical groove portion 27, the horizontal groove portion 28, and the peripheral groove portion 29. In the following description, the grammage of the front core portion 21, the intermediate core portion 22, and the rear core portion 23 refers to the grammage of the block portion excluding the

respective groove portions

27, 28, 29. The structures of the vertical groove portion 27, the horizontal groove portion 28, and the peripheral groove portion 29 will be described later.

[ grammage distribution of absorbent core ]

Fig. 5 is a schematic side view of the absorbent core 20.

The intermediate core portion 22 includes a high grammage portion 24 and a low grammage portion 25. In fig. 4, the high grammage part 24 is represented by a high-density dot pattern, and the low grammage part 25 is represented by a low-density dot pattern.

The high grammage portion 24 is formed at the widthwise center of the intermediate core portion 22 and is disposed so as to face the excretory region of the wearer when worn. The high grammage portion 24 has a front end 24a and a rear end 24b that are opposed to each other in the longitudinal direction, and extends in the longitudinal direction. The width of the lengthwise intermediate portion of the high grammage portion 24 is preferably 15mm or more and 60mm or less, and more preferably 20mm or more and 50mm or less. By setting the width in such a range, the fit to the excretory region of the wearer can be improved, and a sufficient absorption amount can be secured.

The high grammage portion 24 has a length in the longitudinal direction equal to or less than the length of the intermediate core portion 22, for example, the same length as the intermediate core portion 22 in the longitudinal direction.

In the following description, the "front end 24a and the rear end 24 b" are also referred to as "

longitudinal ends

24a and 24 b" or "ends 24a and 24 b".

The high grammage portion 24 has a higher grammage than the front core portion 21, the rear core portion 23, and the low grammage portion 25. Therefore, the high grammage portion 24 is configured to protrude upward in the thickness direction than the low grammage portion 25, the front core portion 21, and the rear core portion 23.

The low grammage portion 25 has a lower grammage than the front core portion 21 and the rear core portion 23, and is formed around the high grammage portion 24. The low grammage portion 25 is configured to be depressed downward from the upper surfaces in the thickness direction of the high grammage portion 24, the front core portion 21, and the rear core portion 23. Here, "around" means a region including at least the widthwise outer side of the high grammage portion 24. Further, the low grammage portion 25 is preferably present at least in the intermediate region M2 of the sanitary napkin 1.

In the present embodiment, the low grammage portion 25 is disposed laterally outward of the high grammage portion 24.

In this manner, the absorbent core 20 is configured such that the grammage increases in the order of the low grammage portion 25, the front core portion 21, the rear core portion 23, and the high grammage portion 24.

The grammage of the front core portion 21 and the rear core portion 23 is substantially the same in the present embodiment. However, the grammage of the front core portion 21 and the grammage of the rear core portion 23 may be different. In this case, the higher grammage of the front core portion 21 and the rear core portion 23 may be lower than the high grammage portion 24, and the lower grammage of the front core portion 21 and the rear core portion 23 may be higher than the low grammage portion 25.

Further, grammage is related to stiffness. Therefore, the absorbent core 20 is configured to have higher rigidity in the order of the low grammage portion 25, the front core portion 21, the rear core portion 23, and the high grammage portion 24.

In the present embodiment, the low grammage portion 25 having the lowest rigidity is disposed on the widthwise outer side of the intermediate core portion 22. Therefore, when an external force toward the inside in the width direction is applied by the legs of the wearer or the like, the low grammage portion 25 is largely compressively deformed in the width direction.

On the other hand, although a tension (tensile force) having a component in the longitudinal direction (X-axis direction) is generated by the compression deformation of the low grammage portion 25, a large tension that deforms the front core portion 21 and the rear core portion 23 is not easily generated because the low grammage portion 25 has low rigidity. In other words, the low grammage portion 25 functions as a buffer region for external force directed inward in the width direction, and can prevent the influence of the external force from being transmitted to the front core portion 21 and the rear core portion 23. This can prevent the front core portion 21 and the rear core portion 23 from being deformed by an external force such as the width of the upper surface in the thickness direction being compressed or the upper surface being curved in a concave shape.

Therefore, the front core portion 21 and the rear core portion 23 can be prevented from being deformed improperly with respect to the wearer, and liquid leakage in the front and rear directions can be prevented.

In addition, since the intermediate core portion 22 is configured to have a narrow width, the magnitude of the external force applied to the low-grammage portion 25 can be reduced, and the compression deformation of the front core portion 21 and the rear core portion 23 can be more reliably prevented.

Further, the high grammage portion 24 located at the widthwise center portion of the intermediate core portion 22 can be prevented from being deformed by the low grammage portion 25 absorbing the external force. Therefore, a gap can be prevented from being generated between the excretion region and the high grammage portion 24, and liquid leakage in the width direction can be prevented in addition to liquid leakage in the front and rear directions.

In this way, the front core portion 21 and the rear core portion 23 are less susceptible to an external force directed inward in the width direction due to the low grammage portion 25.

Further, the tension accompanying the compression deformation of the low grammage portion 25 is likely to act particularly in the vicinity of the boundary portions P1, P2 between the intermediate core portion 22 and the front and

rear core portions

21, 23. In order to further reduce the influence of the tension, the portions disposed near the boundary portions P1 and P2 may be configured as follows.

In the following description, the boundary P1 refers to a portion between the front core portion 21 and the intermediate core portion 22 that is not included, and the boundary P2 refers to a portion between the rear core portion 23 and the intermediate core portion 22 that is not included.

As shown in fig. 3, the core sheet 30 extends outward beyond the widthwise ends of the absorbent core 20 in the intermediate core portion 22 and has a folded-back portion. Since the absorbent core 20 is not present in this portion, the rigidity is lower than the low grammage portion 25 of the intermediate core portion 22, and the region can serve as a buffer region against an external force directed from the width direction outer side toward the low grammage portion 25, and therefore the above-described effect can be further improved.

[ Structure of end portion in longitudinal direction of high grammage portion ]

As shown in fig. 4, the

longitudinal ends

24a, 24b of the high grammage portion 24 closest to the boundary portions P1, P2 have a shape in which the width gradually decreases toward the front end. Thus, the ratio of the low grammage portion 25 functioning as a buffer region for external force can be increased in the region of the intermediate core portion 22 adjacent to the boundary portions P1 and P2. Therefore, the external force damping action by the low grammage portion 25 can be improved, and the front core portion 21 and the rear core portion 23 can be effectively prevented from being deformed into an improper shape.

The

end portions

24a, 24b may also have a circular arc shape or an elliptical arc shape. Accordingly, since the width of the distal ends of the

end portions

24a and 24b is 0, the ratio of the low grammage portion 25 in the region of the intermediate core portion 22 adjacent to the boundary portions P1 and P2 can be further reduced, and the external force damping action by the low grammage portion 25 can be further improved.

The shape of the

end portions

24a, 24b of the high grammage portion 24 is not limited to the above shape.

Fig. 6 is a plan view schematically showing a configuration example of the

longitudinal end portions

24a and 24b of the high-grammage portion 24.

For example, as shown in fig. 6A, the

end portions

24a and 24b may have a triangular shape with an acute tip end. Thus, the

end portions

24a, 24b also have a shape in which the width gradually decreases toward the front end, and the width at the front end of the

end portions

24a, 24b is 0. Therefore, the same operational effects as those of the

end portions

24a and 24b in fig. 4 can be obtained.

Alternatively, as shown in fig. 6B, the end portions 24a and 24B may have a trapezoidal shape including sides in the width direction at the front end, or may have a rectangular shape formed with rounded corners as shown in fig. 6C. Accordingly, the

end portions

24a and 24b also have a shape in which the width gradually decreases toward the distal end, and the external force damping action by the low grammage portion 25 can be improved.

As shown in fig. 6D, the

end portions

24a and 24b may be formed in a rectangular shape having substantially the same width as the whole, without having a shape in which the width gradually decreases toward the tip.

[ structures of tapered portions of front and rear core portions ]

As shown in fig. 4, the front core portion 21 and the rear core portion 23 respectively include tapered

portions

21a, 23a formed adjacent to the boundary portions P1, P2 and having a width gradually decreasing toward the center core portion 22. The

tapered portions

21a, 23a are symmetrical in shape about an axis of symmetry parallel to the width direction.

Along with the compressive deformation of the intermediate core portion 22, tension having components in the longitudinal direction (X-axis direction) and the width direction (Y-axis direction) is applied to the vicinity of the boundary portions P1, P2. By providing the

tapered portions

21a and 23a, portions that project outward in the width direction and are susceptible to the influence of the tension can be removed from the regions of the front core portion 21 and the rear core portion 23 adjacent to the boundary portions P1 and P2. Therefore, it is possible to prevent large deformation such as inward folding of the portions of the front core portion 21 and the rear core portion 23 adjacent to the boundary portions P1 and P2 due to the tension.

Fig. 7 is an enlarged plan view showing the tapered portion 21 a. In the drawing, the boundary groove portion 26, the vertical groove portion 27, the horizontal groove portion 28, and the peripheral groove portion 29, which will be described later, are not shown. Since the configuration of the tapered portion 23a is also the same, illustration and description thereof are omitted.

In the present embodiment, the outer edge line Lt of the tapered portion 21a (tapered portion 23a) is formed by a straight line extending in the direction of the rotation angle θ with respect to an axis parallel to the longitudinal direction. The rotation angle θ is preferably 20 degrees or more and 80 degrees or less, and more preferably 30 degrees or more and 70 degrees or less. This reduces the difference between the direction of the tension and the direction of the outer edge line, and thus more effectively reduces the influence of the tension.

The outer edge lines of the

tapered portions

21a and 23a are not limited to straight lines, and may be curved lines. The shape of the

tapered portions

21a and 23a may be asymmetrical about a symmetry axis parallel to the width direction.

[ Structure of boundary groove portion ]

As shown in fig. 4, the absorbent core 20 further has boundary groove portions 26, the boundary groove portions 26 being located between at least one of the front core portions 21 and the rear core portions 23 and the intermediate core portions 22. That is, the boundary groove 26 is located at the boundary portions P1 and P2. The boundary groove portions 26 can block the deformation of the low grammage portion 25 as described later.

The boundary groove portions 26 are formed with grooves that sink downward from the upper surface of the absorbent core 20 in the thickness direction, and have a lower grammage than the low grammage portion 25. Since the grammage and the thickness have a correlation, the absorbent core 20 has a relatively smaller thickness in the region where the boundary groove portions 26 are formed, i.e., in the bottom portions where the boundary groove portions 26 are formed, than in the low grammage portion 25 or the like where the boundary groove portions 26 are not formed.

The boundary groove portion 26 is formed over the entire length of the intermediate core portion 22 in the width direction. Alternatively, the boundary groove portion 26 may be formed in a part of the intermediate core portion 22 in the width direction.

The width and depth (thickness of the bottom) of the boundary groove 26 can be set as appropriate to obtain the operational effects described below.

The boundary grooves 26 form the boundary portions P1 and P2 to be thin at a low grammage. Therefore, when the intermediate core portions 22 including the low grammage portion 25 are deformed, the boundary groove portions 26 can prevent the transmission of the tension inducing the deformation to the front core portions 21 and the rear core portions 23. Therefore, the deformation of the front core portion 21 and the rear core portion 23 accompanying the deformation of the low grammage portion 25 can be suppressed, and the rear leakage and the front leakage can be effectively prevented.

[ structures of vertical groove portions, horizontal groove portions, and peripheral groove portions ]

Further, the absorbent core 20 has a groove portion of low grammage in addition to the boundary groove portion 26.

As shown in fig. 4, the absorbent core 20 further has longitudinal groove portions 27, lateral groove portions 28, and peripheral groove portions 29. The vertical groove portions 27, the horizontal groove portions 28, and the peripheral groove portions 29 are formed as grooves that are depressed downward from the upper surface in the thickness direction of the absorbent core 20.

The vertical groove portions 27 extend in the longitudinal direction and are arranged at intervals in the width direction. The vertical groove portion 27 is formed over the entire length in the longitudinal direction so as to divide the front core portion 21, the intermediate core portion 22, and the rear core portion 23 in the width direction.

The horizontal groove portions 28 extend in the width direction and are arranged at intervals in the longitudinal direction. The lateral groove portion 28 is formed over the entire length in the width direction so as to divide the front core portion 21, the intermediate core portion 22, and the rear core portion 23 in the longitudinal direction. In the present embodiment, the boundary groove portions 26 formed in the boundary portions P1 and P2 do not include the horizontal groove portions 28.

By providing the vertical groove portions 27 and the horizontal groove portions 28, which have low grammage and are easily deformed, the flexibility of the absorbent core 20 can be improved. Further, the liquid absorption speed of the absorbent core 20 can be increased by introducing liquid into the vertical groove portions 27 and the horizontal groove portions 28.

The peripheral groove portion 29 is formed along the longitudinal outer edge of the high grammage portion 24. By providing the peripheral groove portion 29 which is low in grammage and is easily deformed, the deformation around the high grammage portion 24 is absorbed by the peripheral groove portion 29, and therefore the high grammage portion 24 is less likely to be affected by the deformation around.

The configuration of the vertical groove portions 27, the horizontal groove portions 28, and the peripheral groove portions 29, such as the shape and arrangement thereof, is not limited to the configuration shown in fig. 3 and 4, and may be appropriately set based on the shape of the absorbent core 20, the required function, and the like. In the sanitary napkin 1, the absorbent core 20 may not have at least one of the vertical groove portion 27, the horizontal groove portion 28, and the peripheral groove portion 29.

The widths of the vertical groove portion 27, the horizontal groove portion 28, and the peripheral groove portion 29 are preferably 0.5mm or more and 10mm or less, and more preferably 1mm or more and 5mm or less. The depth of the peripheral groove portion 29, the vertical groove portion 27, and the horizontal groove portion 28 is, for example, 0.5mm to 10 mm.

It is preferable that the vertical groove portions 27 of the intermediate core portion 22 have a width wider than that of the peripheral groove portions 29 because deformation of the absorbent core along the excretory part is likely to be induced. In this case, the width of the vertical groove portion 27 of the intermediate core portion 22 is preferably larger than the peripheral groove portion 29 by 0.5mm or more and 5mm or less, and more preferably larger by 1mm or more and 3mm or less.

[ detailed Structure of compressed groove portion ]

The compressed groove portions 16 shown in fig. 2 and 3 are formed by compressing in the thickness direction from the topsheet 12 toward the absorbent core 20, unlike the respective groove portions of low grammage. Thus, the bottom of the compression groove portion 16 has a higher density than the other regions, and is relatively high in rigidity, and therefore is less likely to be deformed by an external force. Therefore, when an external force directed inward in the width direction is applied to the sanitary napkin 1, the compression groove portions 16 can cause the regions between the paired compression groove portions 16 to bulge upward in the thickness direction. In other words, the compression groove portion 16 can define a deformation region for an external force, and can induce deformation according to the shape of the compression groove portion 16.

Thus, by configuring the compressed groove portions 16 in such a manner, a desired deformation can be induced to the absorbent core 20, and an undesired deformation of the front core portions 21 and the rear core portions 23 can be suppressed.

Fig. 8 is a plan view showing the structure of the compressed groove portions 16 formed in the absorbent core 20. In this figure, the high grammage portion 24, the low grammage portion 25, the boundary groove portions 26, the vertical groove portions 27, the horizontal groove portions 28, the peripheral groove portions 29, and the like are not shown.

The compression groove portion 16 includes a front compression groove portion 161, a middle compression groove portion 162, and a rear compression groove portion 163.

The intermediate compression groove portion 162 is formed in the intermediate core portion 52, extends in the longitudinal direction, and bulges outward in the width direction. The pair of intermediate compression groove portions 162 face each other in the width direction.

The front compression groove portion 161 is located at the front in the longitudinal direction of the middle compression groove portion 162, extends in the longitudinal direction, and bulges outward in the width direction. The pair of front compression groove portions 161 are connected to each other at the longitudinal front end portions.

The rear compression groove portion 163 is located rearward in the longitudinal direction of the intermediate compression groove portion 162, extends in the longitudinal direction, and bulges outward in the width direction. The pair of rear compression groove portions 163 are connected to each other at the longitudinal rear end portions.

In the present embodiment, the pair of compressed groove portions 16 includes two pairs of narrowed

portions

16a and 16b that are adjacent to each other inward in the width direction.

The narrowed portion 16a is formed as a portion where the intermediate compression groove portion 162 and the front compression groove portion 161 are in contact with each other. The intermediate compression groove portion 162 and the front compression groove portion 161 bulge out from the narrowed portion 16 a.

The narrowed portion 16b is formed as a portion where the intermediate compression groove portion 162 and the rear compression groove portion 163 are in contact with each other. The intermediate compression groove portion 162 and the rear compression groove portion 163 bulge out from the narrowed portion 16 b.

As described above, when an external force in the width direction is applied to the intermediate core portion 22, the region between the paired intermediate compression groove portions 162 bulges in the thickness direction. In the narrowed

portions

16a and 16b, the compression grooves having high rigidity run inward in the width direction, and therefore, the transmission of deformation between the intermediate compression groove portions 162 to the front and rear in the longitudinal direction can be blocked. That is, the narrowed

portions

16a and 16b define raised front and rear end portions that can be formed between the intermediate compression groove portions 162.

In the present embodiment, the narrowed

portions

16a and 16b are formed in boundary regions P10 and P20 including boundary portions P1 and P2.

The boundary region P10 is a region including the boundary portion P1, and includes a region of the front core portion 21 adjacent to the boundary portion P1 and a region of the intermediate core portion 22 adjacent to the boundary portion P1. Similarly, the boundary region P20 is a region including the boundary portion P2, and includes a region of the rear core portion 23 adjacent to the boundary portion P2 and a region of the intermediate core portion 22 adjacent to the boundary portion P2. In the present embodiment, the boundary region P10 is a region including a portion from the tapered portion 21a to the intermediate core portion 22 where the end portion 24a is formed, and the boundary region P20 is a region including a portion from the tapered portion 23a to the intermediate core portion 22 where the end portion 24b is formed.

Since the narrowed

portions

16a and 16b of the present embodiment are located in the boundary regions P10 and P20, the deformation induced by the intermediate compression groove portion 162 can be stopped at the boundary regions P10 and P20, and the deformation can be prevented from being transmitted to the front core portion 21 and the rear core portion 23. Thus, the front core portion 21 and the rear core portion 23 can be prevented from being deformed by the external force applied to the intermediate core portion 22 in the width direction by the narrowed

portions

16a, 16 b.

Further, the sanitary napkin 1 may also have 1 or more auxiliary rear grooves 164 extending in the width direction formed between the pair of rear compressed groove portions 163. The shape of the rear core portion 23 can be induced to a desired shape by the auxiliary rear groove 164.

[ additional description of the present embodiment ]

The following complements the description of the present embodiment.

(Material for absorbent core)

As the hydrophilic fibers contained in the absorbent core 20, for example, 1 or 2 or more kinds of hydrophilic fibers such as cellulose-based hydrophilic fibers such as wood pulp fibers, rayon fibers, cotton fibers, and cellulose acetate fibers, polyolefin-based fibers such as polyethylene and polypropylene fibers, and condensation-based fibers such as polyester and polyamide fibers can be used.

Examples of the water-absorbent polymer contained in the absorbent core 20 include 1 or 2 or more kinds of sodium polyacrylate, acrylic acid-vinyl alcohol copolymer, crosslinked sodium polyacrylate, starch-acrylic acid graft copolymer, isobutylene-maleic anhydride copolymer and saponified product thereof, and polyaspartic acid.

(grammage of front and rear cores and high and low grammage parts)

The grammage of the front core portion 21 and the rear core portion 23 is preferably 100g/m²Above and 700g/m²Hereinafter, it is more preferably 150g/m²Above and 620g/m²The following.

The grammage of the high grammage part 24 is preferably 400g/m²Above and 1000g/m²Hereinafter, it is more preferably 500g/m²Above and 900g/m²The following.

The grammage of the low grammage part 25 is preferably 90g/m²Above and 600g/m²Hereinafter, more preferably 140g/m²Above and 500g/m²The following.

The high grammage portion 24 preferably has a grammage 50g/m greater than the grammage of the front core portion 21 and the rear core portion 23²Above, more preferably 100g/m or more²The above.

The grammage of the low-grammage portion 25 is preferably 10g/m smaller than the grammage of the front core portion 21 and the rear core portion 23²Above, more preferably 20g/m or less²The above.

(method of measuring grammage of each part of absorbent body)

Each part of the absorbent core 20 to be measured was cut with a single-blade razor manufactured by featurer, and a small piece was obtained so as to have a predetermined area. The weight of these chips was measured using an electronic balance (electronic balance GR-300 manufactured by A & D, accuracy: 4 digits below decimal point). The grammage of the chips was calculated by dividing the obtained weight by the area of each chip. For each portion, the average of the grammage of 5 chips was defined as the grammage.

(thickness of front and rear core parts and high and low grammage parts)

The thickness of each portion in the thickness direction can be set in consideration of the grammage.

The thicknesses of the front core portion 21 and the rear core portion 23 are preferably 2mm or more and 12mm or less, and more preferably 3mm or more and 10mm or less.

The thickness of the high grammage portion 24 is preferably 3mm or more and 15mm or less, and more preferably 5mm or more and 13mm or less.

The thickness of the low grammage portion 25 is preferably 2mm or more and 10mm or less, and more preferably 3mm or more and 8mm or less.

(method of measuring thickness of each part of absorbent body)

The thickness of the absorbent body 11 to be measured is measured by measuring the thickness of a piece cut out for measuring the grammage of each portion. The measurement portion of the small piece cut out from the absorbent article was pressurized at a pressure of 5kPa for 10 minutes, and measurement was performed immediately after weight removal. In the central region of the sample after weight removal, an acrylic plate having a size of 20mm × 20mm and a thickness of 3mm was placed on the absorber 3, and the thickness of the sample was measured using a noncontact laser displacement meter (laser head LK-G30, displacement meter LK-GD500) manufactured by KEYENCE. When the size of the cut piece is small and it is difficult to measure the piece with a noncontact laser displacement meter, the cut sample may be observed and measured at a magnification of 20 to 100 times with a microscope (VHX-1000 manufactured by KEYENCE corporation).

< other embodiment >

The arrangement of the low grammage portion and the high grammage portion may be, for example, the arrangement described below as long as the low grammage portion can effectively exert a cushioning effect against an external force.

Fig. 9 is a plan view schematically showing an absorbent core 40 of a sanitary napkin 2 according to another embodiment of the present invention.

In the following description, the same components as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

The absorbent core 40 of the sanitary napkin 2 has: a front core portion 41 and a rear core portion 43 opposed to each other in the longitudinal direction; and an intermediate core portion 42 located between the front core portion 41 and the rear core portion 43.

The intermediate core 42 includes a high grammage portion 44 and a low grammage portion 45. In fig. 9, the high grammage part 44 is represented by a high-density dot pattern, and the low grammage part 45 is represented by a low-density dot pattern.

The high grammage portion 44 has a higher grammage than the front core portion 41, the rear core portion 43, and the low grammage portion 45.

The low grammage portion 45 has a lower grammage than the high grammage portion 44, the front core portion 41, and the rear core portion 43, and is formed so as to surround the periphery of the high grammage portion 24.

The high grammage portion 44 has a length L2 shorter than the length L1 of the intermediate core portion 42 in the present embodiment.

Thus, the

end portions

44a, 44b of the high grammage portion 44 are disposed at intervals inward in the longitudinal direction from the boundary portions P1, P2, and the low grammage portion 45 is located outward in the longitudinal direction of the

end portions

44a, 44 b. That is, the low grammage portion 45 is formed so as to surround the periphery of the high grammage portion 44. Therefore, the low grammage portion 45 can be disposed over the entire width of the region of the intermediate core portion 42 adjacent to the boundary portions P1, P2.

As described in embodiment 1, the low grammage portion 45 is largely compressed and deformed when an external force is applied to the inner side in the width direction, and functions as a buffer region for the external force. Therefore, by providing the low grammage portion 45 in the entire region of the intermediate core portion 42 adjacent to the boundary portions P1, P2, the cushioning effect against external forces can be enhanced, and the front core portion 41 and the rear core portion 43 can be more reliably prevented from being deformed improperly. Thus, the liquid leakage at the front core portion 41 and the rear core portion 43 can be prevented.

Further, the high grammage portion 44 and the low grammage portion 45 may be arranged as shown in fig. 10.

In the example shown in fig. 10A, the high grammage portion 44 and the low grammage portion 45 are formed so as to enter the front core portion 41, the front end portion 44a is disposed in the front core portion 41, and the rear end portion 44b is disposed in the intermediate core portion 42.

In the example shown in fig. 10B, the high grammage portion 44 and the low grammage portion 45 are formed so as to enter the rear core portion 43, the front end portion 44a is disposed in the intermediate core portion 42, and the rear end portion 44B is disposed in the rear core portion 43.

Thus, the low grammage portion 45 is disposed around the high grammage portion 44, and can function as a buffer region for external force toward the inner side in the width direction. Thus, it is possible to prevent the front core portion 41 and the rear core portion 43 from being deformed improperly, and to prevent the liquid at the front core portion 41 and the rear core portion 43 from leaking.

In the case where the high grammage portion 44 extends to the front core portion 41 or the rear core portion 43 as shown in fig. 10A, B, the grammage of the low grammage portion 45 and the grammage of the front core portion 41 or the rear core portion 43 are compared as follows.

When the high grammage portion 44 extends to the front core portion 41, the grammage of the region ahead of the end portion 44a is defined as the grammage of the front core portion 41 with the longitudinal end portion 44a of the high grammage portion 44 as a boundary, and this grammage is compared with the grammage of the low grammage portion 45. Similarly, when the high grammage portion 44 extends to the rear core portion 43, the grammage of the region rearward of the end portion 44b is defined as the grammage of the rear core portion 43 with the longitudinal end portion 44b of the high grammage portion 44 as a boundary, and the grammage is compared with the grammage of the low grammage portion 45.

As in each embodiment of fig. 10, when the high grammage portion 24 extends from the intermediate core portion 22 to at least one of the front core portion 21 and the rear core portion 23, the length of the extending portion in the longitudinal direction is preferably 30% or less, more preferably 20% or less, of the length of the front core portion 21 in the front core portion 21, and preferably 20% or less, more preferably 10% or less, of the length of the rear core portion 23 in the rear core portion 23, in terms of obtaining a good wearing feeling and a good fitting feeling.

While the embodiments of the present invention have been described above, it is apparent that the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. For example, the embodiments of the present invention can be combined with each other.

The front core portion and the rear core portion of the absorbent core may have a tapered portion, or may not have a tapered portion, as shown in fig. 9 and 10.

The boundary groove portion may be formed only between the front core portion and the intermediate core portion, or may be formed only between the rear core portion and the intermediate core portion. Alternatively, the absorbent core may not have the boundary groove portions.

In addition, the pair of narrowing portions of the compression groove portion may be formed only in the boundary region, or 3 or more pairs of narrowing portions may be formed in the boundary region. Alternatively, the compression groove portion may not have the constriction.

In the above embodiments, the sanitary napkin is shown as an example of the absorbent article, but is not limited thereto. The absorbent article of the present invention may be, for example, an incontinence pad, a secretion pad, a disposable diaper, or the like.

The present invention further discloses the following absorbent article according to the above embodiment.

<1> an absorbent article comprising an absorbent core having: a front core portion and a rear core portion opposed to each other in a longitudinal direction; and an intermediate core portion located between the front core portion and the rear core portion and narrower than widths of the front core portion and the rear core portion, the intermediate core portion including: a high grammage portion having a higher grammage than the front core portion and the rear core portion and formed at a widthwise center; and a low grammage portion having a lower grammage than the front core portion and the rear core portion and formed around the high grammage portion.

<2> the absorbent article as stated in above <1>, wherein the longitudinal direction end portion of the high grammage portion has a shape in which a width gradually decreases as going to a front end.

<3> the absorbent article according to <2> above, wherein the longitudinal end portion of the high grammage portion has a circular arc shape or an elliptical arc shape.

<4> the absorbent article according to any one of above <1> to <3>, wherein the high grammage part has a length equal to or less than a length of the intermediate core part in the longitudinal direction, and the low grammage part is formed so as to surround a periphery of the high grammage part.

<5> the absorbent article as stated in any one of above <1> to <4>, wherein at least one of the front core portion and the rear core portion has a tapered portion formed adjacent to a boundary portion between it and the intermediate core portion, the tapered portion having a width gradually decreasing toward the intermediate core portion.

<6> the absorbent article according to <5>, wherein the outer edge line of the tapered portion is formed by a straight line extending in a direction having a rotation angle with respect to an axis parallel to the longitudinal direction, the rotation angle being 20 degrees or more and 80 degrees or less, preferably 30 degrees or more and 70 degrees or less.

<7> the absorbent article as stated in any one of above <1> to <6>, wherein said absorbent core further has a boundary groove portion having a lower grammage than said low grammage portion, between said intermediate core portion and at least one of said front core portion and said rear core portion.

<8> the absorbent article as stated in any one of above <1> to <7>, further comprising: a topsheet disposed on the absorbent core; and a pair of compression groove portions formed in the front sheet and the absorbent core, extending in the longitudinal direction, and facing each other in the width direction, the pair of compression groove portions having at least a pair of narrowing portions which approach each other inward in the width direction and formed in a boundary region including a boundary portion between the intermediate core portion and at least one of the front core portion and the rear core portion.

<9> the absorbent article as stated in any one of above <1> to <8>, wherein the absorbent core is covered with a core-wrapped sheet, and the core-wrapped sheet is formed to have a structure having a folded back portion in the intermediate core portion extending further to the outside than the widthwise end portion of the absorbent core.

<10> the absorbent article as stated in any one of above <1> to <9>, wherein the absorbent core has vertical groove portions extending in said longitudinal direction, arranged at intervals in the width direction, and having a grammage lower than that of the peripheral portion.

<11> the absorbent article according to <10> above, wherein the longitudinal groove portion is formed over the entire length in the longitudinal direction so as to divide each of the front core portion, the intermediate core portion, and the rear core portion in the width direction.

<12> the absorbent article according to <10> or <11>, wherein the longitudinal groove portion is provided in the intermediate core portion and is wider than the peripheral groove portion.

<13> the absorbent article according to <12> above, wherein the width of the longitudinal groove portion of the intermediate core portion is larger than the width of the peripheral groove portion by 0.5mm or more and 5mm or less, preferably by 1mm or more and 3mm or less.

<14> the absorbent article as stated in any one of above <1> to <13>, wherein the absorbent core has lateral groove portions extending in the width direction, arranged at intervals in the longitudinal direction, and having a grammage lower than that of the peripheral portion.

<15> the absorbent article according to <14>, wherein the lateral groove portions are formed over the entire length in the width direction so as to divide each of the front core portion, the intermediate core portion and the rear core portion in the longitudinal direction X.

<16> the absorbent article as stated in any one of above <1> to <15>, wherein the intermediate core portion has a peripheral groove portion formed along an outer edge of the high grammage portion.

<17> the absorbent article as stated in any one of above <10> to <16>, wherein the longitudinal groove portions, the lateral groove portions and the peripheral groove portions are grooves sunk downward from an upper surface in the thickness direction of the absorbent core.

<18> the absorbent article according to any one of <10> to <17> above, wherein the widths of the longitudinal groove portions, the lateral groove portions and the peripheral groove portions are 0.5mm or more and 10mm or less, preferably 1mm or more and 5mm or less.

<19> the absorbent article according to any one of <10> to <18> above, wherein the depth of the longitudinal groove portions, the lateral groove portions, and the peripheral groove portions is 0.5mm or more and 10mm or less.

<20> the absorbent article according to any one of <1> to <19> above, wherein the width of the longitudinal middle portion of the high grammage portion is 15mm or more and 60mm or less, preferably 20mm or more and 50mm or less.

<21>As described above<1>～<20>The absorbent article of any one of the above items, wherein the grammage of the high grammage portion is 400g/m²Above and 1000g/m²Hereinafter, it is preferably 500g/m²Above and 900g/m²The following.

<22>As described above<1>～<21>The absorbent article of any one of the above items, wherein the grammage of the low grammage portion is 90g/m²Above and 600g/m²Hereinafter, it is preferably 140g/m²Above and 500g/m²The following.

<23> the absorbent article according to any one of <1> to <22>, wherein the front core portion and the rear core portion have a width of 60mm or more and 100mm or less, preferably 70mm or more and 90mm or less.

<24> the absorbent article according to any one of <1> to <23> above, wherein the front core portion and the rear core portion 23 have a thickness of 2mm or more and 12mm or less, preferably 3mm or more and 10mm or less.

<25>As described above<1>～<24>The absorbent article of any one of the above items, wherein the grammage of the front core portion and the rear core portion is 100g/m²Above and 700g/m²Hereinafter, it is preferably 150g/m²Above and 620g/m²The following.

<26> the absorbent article according to any one of <1> to <25>, wherein the width of the intermediate core portion is 40mm or more and 75mm or less, preferably 50mm or more and 70mm or less.

<27> the absorbent article according to any one of <1> to <24>, wherein a length of the intermediate core portion in a longitudinal direction is 60mm or more and 170mm or less, preferably 80mm or more and 160mm or less.

<28> the absorbent article according to any one of <1> to <27> above, which is a sanitary napkin.

Industrial applicability of the invention

According to the absorbent article of the present invention, liquid leakage at the front portion and the rear portion can be prevented.

Claims

1. An absorbent article comprising a front sheet, a back sheet, and an absorbent body positioned between the front sheet and the back sheet, the absorbent article characterized by:

the absorbent body includes an absorbent core and a core-spun sheet covering the absorbent core,

the absorbent core has: a front core portion and a rear core portion opposed to each other in a longitudinal direction; and a middle core portion located between the front core portion and the rear core portion and narrower than widths of the front core portion and the rear core portion,

the intermediate core includes:

a high grammage portion having a higher grammage than the front core portion and the rear core portion and formed at a widthwise center; and

a low grammage portion having a lower grammage than the front core portion and the rear core portion and formed around the high grammage portion,

the absorbent article further includes:

a main body attachment portion provided on an outer surface of the back sheet;

a pair of wing portions arranged to overlap with the intermediate core portion in the longitudinal direction, extending outward in the width direction from the intermediate core portion, and

a pair of compressed groove portions formed in the topsheet and the absorbent core, extending in the longitudinal direction, and facing each other in the width direction,

the pair of compression groove portions have at least a pair of narrowing portions which are formed in a boundary region including a boundary portion between the intermediate core portion and at least one of the front core portion and the rear core portion and which are close to each other inward in the width direction,

the absorbent core has: a boundary groove portion located at the boundary portion; and a tapered portion adjacent to the boundary portion and having a width gradually decreasing toward the intermediate core portion,

the absorbent article is a sanitary napkin.

2. The absorbent article of claim 1, wherein:

the longitudinal end of the high grammage portion has a shape in which the width gradually decreases as it goes to the front end.

3. The absorbent article of claim 2, wherein:

the end portion of the high grammage portion in the longitudinal direction has an arc shape or an elliptical arc shape.

4. The absorbent article according to any one of claims 1 to 3, wherein:

the high grammage portion has a length in the longitudinal direction that is less than the length of the intermediate core portion,

the low grammage portion is formed so as to surround the periphery of the high grammage portion.

5. The absorbent article of claim 1, wherein:

the outer edge line of the tapered portion is a straight line extending in a direction having a rotation angle with respect to an axis parallel to the longitudinal direction, and the rotation angle is 20 degrees or more and 80 degrees or less.

6. The absorbent article according to any one of claims 1 to 3, wherein:

the boundary trench portion has a lower grammage than the low grammage portion.

7. The absorbent article according to any one of claims 1 to 3, wherein:

in the intermediate core portion, the core-covering sheet extends further outward than the widthwise end portion of the absorbent core, and is formed to have a folded-back portion.

8. The absorbent article according to any one of claims 1 to 3, wherein:

the absorbent core has longitudinal grooves extending in the longitudinal direction, arranged at intervals in the width direction, and having a lower grammage than the surrounding area.

9. The absorbent article of claim 8, wherein:

the longitudinal groove portion is formed over the entire length in the longitudinal direction so as to divide each of the front core portion, the intermediate core portion, and the rear core portion in the width direction.

10. The absorbent article of claim 8, wherein:

the vertical groove portion is provided in the intermediate core portion and is wider than a peripheral groove portion formed along an outer edge of the high grammage portion.

11. The absorbent article of claim 10, wherein:

the width of the vertical groove portion of the intermediate core portion is larger than the width of the peripheral groove portion by 0.5mm to 5 mm.

12. The absorbent article according to any one of claims 1 to 3, wherein:

the absorbent core has transverse groove portions extending in the width direction, arranged at intervals in the longitudinal direction, and having a lower grammage than the peripheral portion.

13. The absorbent article of claim 12, wherein:

the lateral groove portion is formed over the entire length in the width direction so as to divide each of the front core portion, the middle core portion, and the rear core portion in the longitudinal direction.

14. The absorbent article according to any one of claims 1 to 3, wherein:

the intermediate core portion has a peripheral groove portion formed along an outer edge of the high grammage portion.

15. The absorbent article according to any one of claims 1 to 3, wherein:

the absorbent core has longitudinal groove portions extending in the longitudinal direction, arranged at intervals in the width direction, and having a lower grammage than the peripheral portion, and lateral groove portions extending in the width direction, arranged at intervals in the longitudinal direction, and having a lower grammage than the peripheral portion,

16. The absorbent article of claim 15, wherein:

at least one of the longitudinal groove portions extending in the longitudinal direction, the lateral groove portions extending in the width direction, and the peripheral groove portions formed along the outer edge of the high grammage portion is a groove recessed downward from the upper surface in the thickness direction of the absorbent core.

17. The absorbent article of claim 15, wherein:

at least one of a longitudinal groove portion extending in the longitudinal direction, a lateral groove portion extending in the width direction, and a peripheral groove portion formed along an outer edge of the high grammage portion has a width of 0.5mm or more and 10mm or less.

18. The absorbent article of claim 15, wherein:

at least one of a longitudinal groove portion extending in the longitudinal direction, a lateral groove portion extending in the width direction, and a peripheral groove portion formed along an outer edge of the high grammage portion has a depth of 0.5mm or more and 10mm or less.

19. The absorbent article according to any one of claims 1 to 3, wherein:

the width of the middle part of the high grammage part in the longitudinal direction is 15mm to 60 mm.

20. The absorbent article according to any one of claims 1 to 3, wherein:

the gram weight of the high gram weight part is 400g/m²Above and 1000g/m²The following.

21. The absorbent article according to any one of claims 1 to 3, wherein:

the gram weight of the low gram weight part is 90g/m²Above and 600g/m²The following.

22. The absorbent article according to any one of claims 1 to 3, wherein:

the front core and the rear core have a width of 60mm to 100 mm.

23. The absorbent article according to any one of claims 1 to 3, wherein:

the front core part and the rear core part have a thickness of 2mm to 12 mm.

24. The absorbent article according to any one of claims 1 to 3, wherein:

the grammage of the front core part and the rear core part is 100g/m²Above and 700g/m²The following.

25. The absorbent article according to any one of claims 1 to 3, wherein:

the width of the intermediate core is 40mm to 75 mm.

26. The absorbent article according to any one of claims 1 to 3, wherein:

the length of the intermediate core in the longitudinal direction is 60mm to 170 mm.