JP6645818B2 - Absorbent pad - Google Patents

Description

  The present invention relates to an absorbent pad to be fitted inside a diaper.

Patent Literature 1 discloses a sanitary napkin provided with an absorber that absorbs a liquid. The absorbent body of the sanitary napkin has a compressed groove provided in the center in the width direction and extending in the longitudinal direction, and a pair of different compressed grooves provided on both sides of the compressed groove. This napkin is
It is said that it is deformed into a W shape by being sandwiched between the legs of the wearer during use.

Patent Document 2 discloses a pants-type diaper provided with an absorber that absorbs liquid. This absorbent article for a pants-type diaper has a two-layer structure including a first layer (lower layer) and a second layer (upper layer) stacked on the first layer. The first layer of the absorber is provided at the center in the width direction and has an opening extending in the longitudinal direction. The second layer of the absorber has a pair of side slits provided on both sides of the opening of the first layer. It is said that the crotch region of the diaper is deformed into a W shape by being sandwiched between the legs of the wearer during use.

Japanese Utility Model Publication No. 03-33622 JP 2011-177308 A

At present, absorbent pads to be worn inside diapers are being developed. In use, such an absorbent pad is placed in the crotch region of the diaper, i.e., between the wearer's legs. However,
Since such an absorbent pad is attached to a diaper, the total thickness of the diaper and the absorbent pad is increased, and as a result, the wearer may feel uncomfortable.

In addition, after the absorbent pad is crushed in the width direction by being sandwiched between the legs of the wearer, there is a problem that the absorbent pad is difficult to recover to the original shape even if the wearer opens both legs. If the wearer maintains the crushed state of the absorbent pad when the legs are opened, there is a possibility that liquid (body fluid) may leak from the absorbent pad, or the liquid may actually leak. There is.

Therefore, an absorbent pad that reduces the discomfort of the wearer during use and that easily recovers to the original shape when the wearer opens the leg is desired.

The absorbent pad according to one aspect is an absorbent pad that is attached to the inside of a diaper. The absorbent pad is provided in a longitudinal direction, a width direction orthogonal to the longitudinal direction, a top sheet, a back sheet, and an absorbent core provided between the top sheet and the back sheet and including an absorbent core made of an absorbent material. And The absorber has a peripheral region and a central region surrounded by the peripheral region. The peripheral region has a smaller thickness than the central region and has higher rigidity than the central region. At the boundary between the peripheral region and the central region adjacent to the central region in the width direction with respect to the central region, a pair of low basis weight regions extending along the longitudinal direction, and the central region,
A groove extending in the longitudinal direction at the center in the width direction on the non-skin surface side of the absorber.

The absorbent pad according to the above aspect reduces the discomfort of the wearer during use, and easily recovers to the original shape when the wearer opens the leg.

FIG. 1 is a plan view of an absorbent pad according to one embodiment. FIG. 2 is a cross-sectional view of the absorbent pad taken along line F2-F2 in FIG. FIG. 3 is a plan view of the absorber according to one embodiment. FIG. 4 is a plan view of the absorber viewed from the opposite side to FIG. FIG. 5 is a schematic cross-sectional view showing a deformed state of the absorbent pad when a weak force is applied from the lateral outside to the inside. FIG. 6 is a schematic cross-sectional view showing another shape state of the absorbent pad in a state where a strong force is applied from the lateral outside to the inside. FIG. 7 is a perspective view showing an example of a diaper to which an absorbent pad is attached. FIG. 8 is a plan view showing the absorbent pad attached to the developed diaper.

Hereinafter, an absorption pad according to an embodiment will be described with reference to the drawings. The absorbent pad of the present invention relates to, for example, an absorbent pad to be mounted inside a disposable diaper. The disposable diaper may be an adult diaper.

In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions may be different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, parts having different dimensional relationships and ratios between drawings may be included.

(1) Configuration of Absorption Pad FIG. 1 is a plan view of an absorption pad according to one embodiment. FIG. 1 shows the absorbent pad in an extended state. FIG. 2 is a cross-sectional view of the absorbent pad taken along line F2-F2 in FIG.
FIG. 3 is a plan view of the absorber provided on the absorbent pad. FIG. 4 is a plan view of the absorber viewed from the opposite side to FIG.

The absorbent pad 10 has a longitudinal direction L and a width direction W. The longitudinal direction L is the front side of the wearer (
It is a direction extending from the abdomen) to the rear side (the dorsal side), or a direction extending from the rear side of the wearer to the front side.
The width direction W is a direction orthogonal to the longitudinal direction L. Hereinafter, the side facing the wearer's skin during use may be referred to as “skin side”. Also, the side that is turned away from the wearer's skin during use,
It may be called "non-skin side".

The absorbent pad 10 has a top sheet 20, a back sheet 22, and an absorber 30. The topsheet 20 faces the wearer's skin when the absorbent pad 10 is worn. The topsheet 20 covers the absorber 30. The topsheet 20 may be composed of a liquid-permeable sheet.

The back sheet 22 is turned to the side opposite to the wearer's skin when the absorbent pad 10 is worn, and faces the disposable diaper. The back sheet 22 may be composed of a liquid-impermeable sheet.

The absorbent pad 10 may have a side sheet 50 and elastic members 52 and 54. The elastic member 54 extends long along the longitudinal direction L, and is provided on the non-skin side of the back sheet 22. The side sheet 50 covers the elastic member 54 on the non-skin side of the back sheet 22. The elastic member 54 is attached to the back sheet 22 while extending in the longitudinal direction L. As a result, the peripheral portion of the absorbent pad 10 in the width direction W contracts in a natural state. Here, the natural state refers to a state in which no external force is applied to the absorbent pad 10.

The side sheet 50 extends from the non-skin side of the back sheet 22 to the top sheet 20 through the end in the width direction W of the absorbent pad 10. The end of the side sheet 50 on the side of the top sheet 20 is folded back and encloses the elastic member 52. The elastic member 52 is attached to the side sheet 50 while extending in the longitudinal direction L. Thus, the end of the side sheet 50 on the side of the top sheet 20 forms a standing gather.

The absorber 30 is provided between the top sheet 20 and the back sheet 22. The absorber 30 is
Includes an absorbent core 32 made of an absorbent material. The absorbent material constituting the absorbent core 32 can be formed, for example, from hydrophilic fibers, pulp, and superabsorbent polymers (SAP). The absorber 30 may have a core wrap 34 surrounding the absorbent core 32. The core wrap 34 can be made of, for example, a nonwoven fabric or a tissue sheet.

The absorbent core 32 preferably has a single-layer structure. In other words, in the state where the absorbent pad 10 is extended and the natural state of the absorbent pad 10, the absorbent cores 32 in each region are arranged without overlapping each other in the thickness direction.

The absorber 30 has a central region C and a peripheral region P. The central region C is a region including the center of the absorber 30 and not including the edge of the absorber 30. When the absorbent pad is worn, the central region C is located at the inseam of the wearer.

The peripheral region P is a region surrounding the central region C, and includes the edge of the absorber 30. The peripheral region P is a region having a thickness smaller than that of the central region C and having higher rigidity than that of the central region C. That is, the thickness T2 of the absorber 30 in the peripheral region P is smaller than the thickness T1 of the absorber 30 in the central region C. Furthermore, the rigidity of the absorber 30 in the peripheral region P is higher than the rigidity of the absorber 30 in the central region C.

The peripheral region P preferably has a thickness of 2.4 to 3.6 mm. On the other hand, the thickness of the central region C is preferably 3.6 to 5.4 mm. The thickness can be measured using “PEACOCK Dial Thickness Gauge J-B manufactured by Ozaki Seisakusho Co., Ltd.” having a measuring element with a diameter of 50 mm. Specifically, the thickness of the measurement site was measured while sandwiching the measurement site of the sample between the measurement terminals having a diameter of 50 mm and adjusting the load to 3.0 gf / cm ² .

The rigidity (MD) of the peripheral region P is preferably 4.2 to 7.2 mN / 25 mm. On the other hand, the rigidity (MD) of the central region C is preferably 2.2 to 5.2 mN / 25 mm.

Here, in the present specification, the stiffness value is defined as a value obtained by dividing the value measured by the Gurley stiffness by the length of the sample piece. For the measurement of Gurley rigidity, No. A 311 Gurley-type flexibility tester (manufactured by Yasuda Seiki Seisakusho) is used. This tester complies with JIS-L1096. This tester is a tester for measuring the flexibility (bending rebound) of a sample piece. First, the sample piece is attached to the chuck of the movable arm, rotated to the right and left at a specified speed, the scale at the time when the lower end of the sample piece is separated from the pendulum is read, and the rigidity S (mN) is calculated based on the following equation And calculate.

S = R × (D ₁ W ₁ + D ₂ W ₂ + D ₃ W ₃ ) × (L-12.7) ² /b×3.375×
^10-5 .

Here, R is a scale plate reading, and D ₁ , D ₂ , and D ₃ are distances from the pendulum fulcrum to the weight mounting position (25.4 mm (1 in.), 50.8 mm (2 in.), 101.6 mm). (4
in. )), W ₁ , W ₂ , W ₃ are the masses (g) of the weights attached to the holes of D ₁ , D ₂ , D ₃ , L is the length (mm) of the sample piece, b Is the width (mm) of the sample piece.

In the present specification, a sample piece is obtained by cutting the absorber of the absorbent pad 10 into a rectangular parallelepiped having a length of 38 mm and a width of 17.5 mm. In this case, the length L of the sample piece
Is 38 mm, and the width b of the sample piece is 17.5 mm. Thus, the Gurley stiffness (mN) per 38 mm length of the sample piece is measured. The longitudinal direction of the sample piece is, for example, the longitudinal direction of the absorbent pad 10 (the transport direction (MD direction) at the time of manufacture), but is not limited thereto.

The boundary between the peripheral region P and the central region C outside the low basis weight region 42 described later in the longitudinal direction L is inclined linearly inward in the width direction W toward the outside in the longitudinal direction L. Is preferred.

In order to increase the rigidity of the absorber 30 in the peripheral region P, it is preferable that a compression groove 46 is formed in the absorber 30 in the peripheral region P. The pressing groove 46 may be provided entirely in the peripheral region P. In the present embodiment, the compressed grooves 46 are formed in a lattice shape on the skin side of the absorber 30. More specifically, the compressed groove 46 may be formed linearly along a first direction and a second direction intersecting the first direction. The first direction and the second direction may be directions inclined with respect to the longitudinal direction L. Instead of this embodiment, the pressing groove 4
6 may be formed in any pattern as long as the rigidity of the peripheral region P can be increased. Since the peripheral area P has relatively high rigidity and is easy to maintain the original shape, the force received from the side of the absorbent pad generated by the wearer changing his posture is easily transmitted to the central area C.

The absorber 30 has a groove 40 and a pair of low basis weight regions 42. The groove 40 is provided on the non-skin surface side of the absorber 30 in the central region C. The groove 40 may be a compressed groove in which the absorber 30 is compressed. The groove 40 extends in the longitudinal direction L at the center in the width direction W. The length of the groove 40 in the longitudinal direction L is preferably 80 to 150 mm, more preferably 90 to 110 mm.
It is.

The pair of low basis weight regions 42 extend along the longitudinal direction L. The pair of low basis weight areas 42
It is provided at the boundary between the peripheral region P adjacent to the central region C in the width direction W and the central region C.

The low basis weight region 42 is defined by a region composed of an absorbent core having a basis weight lower than the basis weight (basis weight) of the absorbent core 32 in the central region C and the peripheral region P, or a region substantially not including the absorbent core. . That is, the low basis weight region 42 is a concept including a region where the basis weight of the absorbent core 32 is zero. Here, the region that does not substantially include the absorbing core means a region that does not include the absorbing material constituting the absorbing core 32 in design. In other words, the region substantially free of the absorbent core is
This is a concept that includes a region where a small amount of absorbing material is mixed during manufacturing.

The low basis weight area 42 may be an area including an absorbent core having a basis weight of 0 to 200 g / m ² . The low basis weight region 42 is a region including an absorbent core having a basis weight of preferably 150 g / m ² or less, more preferably 100 g / m ² or less.

The low basis weight area 42 is a boundary where the rigidity of the absorbent pad 10 changes. Therefore, the low basis weight area 42 corresponds to an area where the absorbent pad 10 is easily deformed.

Preferably, the length of the groove 40 in the longitudinal direction L is equal to the low basis weight area 42 in the longitudinal direction L.
Longer than the length. The length of the low basis weight area 42 in the longitudinal direction L is preferably 60 to 13
0 mm, more preferably 70 to 90 mm. Width W of low basis weight area 42 in width direction W
1 is preferably larger than the thickness T2 of the absorber 30 in the peripheral region P. Width direction W
Is preferably 10 to 25 mm, more preferably 20 mm.

The distance W2 between the pair of low basis weight regions 42 is preferably shorter than the total width (W3 + W3) of the peripheral region P in the width direction W at the center position in the longitudinal direction L. The distance between the pair of low basis weight regions 42 may be, for example, 40 to 60 mm.

The “length”, “width”, and “distance” described in the present specification are numerical values measured in a state where the absorbent pad 10 is stretched until the wrinkles disappear.

The absorbent core 32 preferably extends to the edge of the absorbent pad 10 in the width direction W within the range of the longitudinal direction L where the low basis weight area 42 is provided. The absorbent core 32 may have a linear outline along the longitudinal direction L at least in the range of the longitudinal direction L where the low basis weight area 42 is provided.

The absorbent pad 10 may have a locking portion 90 for locking the diaper on the non-skin side of the back sheet 22. In FIG. 1, the locking portion 90 is shown in a perspective manner by a dotted line. Locking part 90
Is preferably provided so as to avoid a region where the groove 40 is formed in the longitudinal direction L.

The topsheet 20 and the absorber 30 extend to the outer end in the width direction W in the central portion of the absorbent pad 10, for example, at least in a range where the central region C exists along the longitudinal direction L as shown in FIG. I have. Thereby, even if the thickness of the absorber 30 is reduced, the liquid such as urine diffused to the outer end in the width direction W of the absorbent pad 10 can be absorbed, so that the liquid hardly leaks from the absorbent pad 10. Further, since the topsheet 20 and the absorber 30 extend to the outer end in the width direction W, relatively high rigidity is maintained up to the outer end in the width direction W of the absorbent pad 10, and as a result, the absorbent pad The force received from the side of 10 is easily transmitted to the central area C.

(2) Absorbing Pad During Wearing Next, an example of the shape of the absorbing pad 10 during wearing will be described with reference to FIGS. 5 and 6.
FIG. 5 shows the deformation of the absorbent pad when the absorbent pad receives a weak force from the outside to the inside in the width direction W. FIG. 6 shows the deformation of the absorbent pad when the absorbent pad receives a strong force from outside to inside in the width direction W. In FIGS. 5 and 6, the compressed groove 46 is not shown for simplification of the drawings.

During use, the absorbent pad 10 is sandwiched between both legs of the wearer and receives a force from the outside to the inside in the width direction W. When the absorbing pad 10 receives a weak force in the width direction W, the outer region in the width direction W of the peripheral region P rises upward, and the peripheral region P tries to move toward the central region C (see FIG. 5). . The center of the central region C is deformed in a convex shape toward the wearer's skin by being pushed by the peripheral region P. At this time, since the groove 40 is formed on the non-skin surface side of the central region C, the absorber 30 is easily deformed in a convex shape toward the wearer's skin. Further, since the rigidity of the low basis weight area 42 is low, the absorbent pad 10 is likely to bend based on the low basis weight area 42. As a result, the absorbent pad 10 is deformed into a substantially W shape in a cross section along the width direction W.

When the absorbent pad 10 receives a strong force from the outside to the inside in the width direction W at the time of mounting, the peripheral region P of the absorber 30 has a relatively high rigidity, so that the shape of the absorbent core 32 in the central region C is maintained while maintaining its shape.
(See FIG. 6). Therefore, while the overall width of the absorbent pad 10 is reduced,
The absorber 30 in the central region C can be deformed to fit the body. Width W1 of low basis weight area 42
Is larger than the thickness T2 of the absorber 30 in the peripheral region P, so that even if the absorbent pad 10 is deformed in this way, the overall thickness of the absorbent pad 10 does not become too large.

(3) Disposable diaper to which an absorbent pad is attached FIG. 7 is a perspective view showing an example of a diaper to which an absorbent pad is attached. FIG. 8 is a plan view showing the absorbent pad attached to the developed diaper. FIG. 8 shows the absorbent pad and the diaper in a stretched state. The disposable diaper may be, for example, an adult diaper.

The disposable diaper 1 may have a pants-type structure as an example. The disposable diaper 1 has a girth region applied to a wearer's girth, and a crotch region applied to a wearer's crotch. The waist edges 4, 4 'located outside the width direction W of the front waist region are joined with the rear waist edges 6, 6' located outside the lateral direction W of the rear waist region S2, thereby disposable. The diaper 1 is formed in a pants shape. The disposable diaper 1 has a pair of leg openings 9 surrounding the wearer's legs when formed in a pants shape. The crotch region is a region between the pair of leg openings 9.

The disposable diaper 1 includes an absorbent main body 1A. The absorbent main body 1A may include a top sheet, a back sheet, and an absorber 130 between the top sheet and the back sheet. Absorber 13
0 is provided at least in the crotch region. The absorber 130 may be formed of a mixed powder such as pulverized pulp or a superabsorbent polymer.

The above-mentioned absorbent pad 10 is mounted on the crotch region of the disposable diaper 1. After the wearer has excreted, only the absorbent pad 10 can be replaced. Thereby, the disposable diaper can be used for a long time.

The width W4 of the absorbent pad 10 in the width direction W is the same as the width of the absorbent 13
It is preferably larger than the minimum width W5 in the width direction W of 0.

(4) Operation and Effect According to the absorbent pad 10 according to the embodiment, the absorber 30 includes the peripheral region P and the peripheral region P.
And a central region C surrounded by The peripheral region P has a smaller thickness than the central region C and has higher rigidity than the central region C. Absorber 30 includes a pair of low basis weight regions 42 extending along longitudinal direction L at a boundary between peripheral region P and central region C adjacent to central region C in width direction W.
And a groove 40 extending in the longitudinal direction L at the center in the width direction W on the non-skin surface side of the absorber 30 in the central region C.

Since the peripheral region P surrounding the central region C corresponding to the excretion part of the wearer is thin, the absorbent pad 1
0 is attached to the inside of the diaper, so that the feeling of incongruity due to the increase in thickness is unlikely to occur, and since the peripheral region P is highly rigid, the shape of the peripheral region P may be changed even if a force is applied from the outside in the width direction W to the inside. Easy to be maintained. Therefore, when the force that causes the absorbent pad 10 to shrink in the width direction W is removed, the absorbent pad 10 is easily recovered to its original shape because of the high-rigidity peripheral region P.

Since the pair of low basis weight regions 42 can reduce the amount of absorbent material forming the absorbent core 32, even if the absorbent pad 10 is mounted on a diaper, the total thickness of the absorbent pad 10 and the diaper in the crotch region Can be reduced. This can reduce the discomfort of the wearer during use. Further, since the low basis weight area 42 is a relatively soft area, the absorbent pad 10 fits the wearer's body based on the low basis weight area 42 when receiving a force from the outside in the width direction W to the inside. Easy to deform.

Furthermore, since the central region C has a rigidity lower than the rigidity of the peripheral region P and is soft, the central region C is easily deformed so as to fit the wearer's body at the time of use, and does not easily give the wearer an uncomfortable feeling. In addition, the groove 40 formed on the non-skin side of the absorber 30 easily deforms the central region C of the absorbent pad 10 so as to protrude toward the wearer's skin. This makes it easier for the absorbent pad 10 to fit the wearer's body during use.

As described above, the absorbent pad 10 reduces the discomfort of the wearer during use, and easily recovers to the original shape when the wearer opens the leg. Furthermore, the absorbing pad 10 is easily deformed according to the shape of the body when receiving a force from the outside to the inside in the width direction W, and as a result, the leakage of the liquid can be suppressed.

According to one embodiment, the absorbent core 32 has a single-layer structure. Thereby, the thickness of the absorber 30 can be suppressed. In particular, since the absorbent pad 10 is attached to the diaper at the time of use,
It is preferable that the thickness be as thin as possible from the viewpoint of comfort. In addition, by combining with the above-described embodiment, it is possible to achieve both comfort and fit to the body.

Further, when the absorbent core 32 has a structure of two or more layers, when a force is applied from the outside in the width direction W, a gap may be generated between the layers due to the deformation of the absorber 30. Therefore, it becomes difficult to maintain the shape of the absorber, and the recoverability of the shape of the absorber may decrease. In the present embodiment, since the absorption core 32 is a single layer, it is possible to suppress a decrease in the recoverability of the shape of the absorber 30.

According to one embodiment, the low basis weight area 42 is an area substantially free of absorbent material. Thereby, the absorbent pad 10 and the absorbent body 30 are easily deformed at the low basis weight area 42.
Therefore, the absorbent pad 10 is more easily fitted to the wearer's body.

According to one embodiment, the distance W2 between the pair of low basis weight regions 42 is shorter than the sum of the widths of the peripheral regions in the width direction W at the center position in the longitudinal direction L (W3 + W3). Absorbing pad 1 when installed
When a weak force is applied to the outside from the width direction W, the absorbent pad 10 is deformed into a substantially W shape in a cross section along the width direction W as shown in FIG. When the absorbent pad 10 is deformed into a substantially W-shape, the height of the peripheral region P becomes sufficiently high, so that leakage of liquid from the outside of the absorbent pad 10 in the width direction W can be further prevented.

According to one embodiment, the width W1 of the low basis weight area 42 in the width direction W is larger than the thickness T2 of the absorber 30 in the peripheral area P. This allows the absorbent pad 10 to move in the width direction W during mounting.
When a strong force is applied from the outside to the inside, the peripheral region P of the absorber 30 is
2 (see FIG. 6). Therefore, while the overall width of the absorbent pad 10 is reduced, the absorbent body 30 in the central region C can be deformed to fit the body. Width W of low basis weight area 42
Since 1 is larger than the thickness T2 of the absorber 30 in the peripheral region P, even if the absorbent pad 10 is deformed in this way, the overall thickness of the absorbent pad 10 does not become too large. As a result, the discomfort of the wearer can be reduced.

Further, when the absorbent pad 10 receives a strong force from the outside to the inside in the width direction W, the peripheral region P of the absorber 30 is more easily inserted under the absorbent core 32 in the central region C.
Is preferably larger than the total value of the thickness T2 of the absorber 30 in the peripheral region P and the thickness T1 of the absorber 30 in the central region C.

According to one embodiment, the absorbent pad 10 has a locking portion 90 that locks to the diaper on the non-skin side of the back sheet 22. The locking portion 90 is provided to avoid a region where the groove 40 is formed in the longitudinal direction L. Thus, the region where the groove 40 is formed and the region outside the width direction W of the region where the groove 40 is formed are not directly locked to the diaper. Accordingly, it is possible to prevent the locking portion 90 from hindering the deformation of the absorbent pad 10, and as a result, it is possible to suppress a decrease in the fit of the absorbent pad 10 to the body.

According to one embodiment, the length of the groove 40 in the longitudinal direction L is longer than the length of the low basis weight area 42 in the longitudinal direction L. Thereby, the distance between the position of the end of the groove 40 in the longitudinal direction L and the position of the end of the low basis weight area 42 in the longitudinal direction L becomes longer. Therefore, when the absorbent pad 10 is deformed as shown in FIGS. 5 and 6, the deformation of the absorbent pad 10 along the longitudinal direction L to a region that does not protrude from the projecting portion becomes gentle.

According to one embodiment, the absorbent core 32 extends to the edge of the absorbent pad 10 in the width direction W within the range of the longitudinal direction L where the low basis weight area 42 is provided. The region where the absorbent core 32 exists is a region having relatively high rigidity in the absorbent pad 10. That is, the region having relatively high rigidity extends to the edge of the absorbent pad 10 in the width direction W. Thereby, when a force directed inward in the width direction from the edge in the width direction W of the absorbent pad 10 is applied, the force is efficiently transmitted to the pair of low basis weight areas 42 and the central area C. Accordingly, the absorbent pad 10 is more easily deformed to fit the wearer's body during use.

According to one embodiment, outside the low basis weight area 42 in the longitudinal direction L, the boundary 44b between the peripheral area P and the central area C is linearly inward in the width direction W toward the outside in the longitudinal direction L. It is inclined. When the boundary of the peripheral region P is straight rather than curved, the boundary 44b of the peripheral region P is more likely to be the starting point of folding, and the central region C of the absorbent pad 10 fits the wearer's body. It becomes easy to be deformed. Further, since the absorbent pad 10 is bent neatly at the boundary 44b of the peripheral region P, it is possible to reduce a sense of discomfort of the wearer.

According to one embodiment, the width W4 of the absorbent pad 10 in the width direction W is larger than the minimum width W5 in the width direction W of the absorber 130 arranged in the crotch region of the diaper. Accordingly, when the absorbent pad 10 is mounted on the diaper, both ends of the absorbent pad 10 outside the width direction W protrude outside the width direction W of the diaper absorber 130 in the crotch region. The force received from the side of the wearer's leg from the side inward in the width direction W by being sandwiched between the wearer's legs is transmitted to the absorbent pad 10 before the absorber 130 arranged in the crotch region of the diaper. Therefore, the absorbent pad 1
Since the deformation of the absorbent pad 10 is promoted and the absorbent pad 10 fits the body, even when the absorbent pad 10 and the diaper are worn while being layered, it is difficult to feel a sense of incongruity.

Further, in the crotch region, the absorbent pad 1 is extended to a region wider than the absorber 130 of the diaper 1.
Since 0 exists, the liquid hardly leaks to the diaper 1. Accordingly, there is an advantage that only the absorbent pad 10 needs to be replaced many times without replacing the diaper.

As described above, the present invention has been described in detail using the above-described embodiment.
Obviously, the invention is not limited to the embodiments described herein. The present invention can be implemented as modified and changed aspects without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description herein
It is intended for illustrative purposes and does not have any restrictive meaning to the present invention.

DESCRIPTION OF SYMBOLS 10 Absorbent pad 20 Top sheet 22 Back sheet 30 Absorber 32 Absorbent core 40 Groove 42 Low basis weight area 46 Compressed groove 90 Locking part C Central area P Peripheral area L Longitudinal direction W Horizontal direction

Claims (9)

An absorbent pad to be fitted inside the diaper,
Longitudinal direction,
A width direction orthogonal to the longitudinal direction,
A topsheet,
A back sheet,
An absorber including an absorbent core made of an absorbent material, provided between the top sheet and the back sheet,
The absorber has a peripheral region and a central region surrounded by the peripheral region,
The absorber,
At a boundary between the peripheral region and the central region adjacent to the central region in the width direction, a pair of low basis weight regions extending along the longitudinal direction,
In the central region, on the non-skin side of the absorber, a groove extending in the longitudinal direction at the center in the width direction,
The width of the low basis weight regions in the width direction is much larger than the thickness of the absorber in the peripheral region,
On the non-skin side of the back sheet, has a locking portion to lock the diaper,
The absorbing pad , wherein the locking portion is provided so as to avoid a region where the groove is formed in the longitudinal direction . An absorbent pad to be fitted inside the diaper,
Longitudinal direction,
A width direction orthogonal to the longitudinal direction,
A topsheet,
A back sheet,
An absorber including an absorbent core made of an absorbent material, provided between the top sheet and the back sheet,
The absorber has a peripheral region and a central region surrounded by the peripheral region,
The absorber,
At a boundary between the peripheral region and the central region adjacent to the central region in the width direction, a pair of low basis weight regions extending along the longitudinal direction,
In the central region, on the non-skin side of the absorber, a groove extending in the longitudinal direction at the center in the width direction,
The absorbent pad, wherein a length of the groove in the longitudinal direction is longer than a length of the low basis weight region in the longitudinal direction. An absorbent pad to be fitted inside the diaper,
Longitudinal direction,
A width direction orthogonal to the longitudinal direction,
A topsheet,
A back sheet,
An absorber including an absorbent core made of an absorbent material, provided between the top sheet and the back sheet,
The absorber has a peripheral region and a central region surrounded by the peripheral region,
The absorber,
At a boundary between the peripheral region and the central region adjacent to the central region in the width direction, a pair of low basis weight regions extending along the longitudinal direction,
In the central region, on the non-skin side of the absorber, a groove extending in the longitudinal direction at the center in the width direction,
Outside the lower basis weight region in the longitudinal direction, a boundary between the peripheral region and the central region is linearly inclined inward in the width direction toward the outside in the longitudinal direction,
On the non-skin side of the back sheet, has a locking portion to lock the diaper,
The absorbing pad , wherein the locking portion is provided so as to avoid a region where the groove is formed in the longitudinal direction . An absorbent pad to be fitted inside the diaper,
Longitudinal direction,
A width direction orthogonal to the longitudinal direction,
A topsheet,
A back sheet,
An absorber including an absorbent core made of an absorbent material, provided between the top sheet and the back sheet,
The absorber has a peripheral region and a central region surrounded by the peripheral region,
The absorber,
At a boundary between the peripheral region and the central region adjacent to the central region in the width direction, a pair of low basis weight regions extending along the longitudinal direction,
In the central region, on the non-skin side of the absorber, a groove extending in the longitudinal direction at the center in the width direction,
The absorbent pad, wherein a width of the absorbent pad in the width direction is larger than a minimum width in a width direction of the absorber disposed in a crotch region of the diaper. On the non-skin side of the back sheet, has a locking portion to lock the diaper,
The absorbent pad according to claim 2 , wherein the locking portion is provided to avoid a region where the groove is formed in the longitudinal direction. The absorbent pad according to any one of claims 1 to 5 , wherein the absorbent core has a single-layer structure. The absorbent pad according to any one of claims 1 to 6 , wherein the low basis weight region is a region that does not substantially include the absorbent material. The absorbent pad according to any one of claims 1 to 7 , wherein a distance between the pair of low basis weight regions is shorter than a total width of the peripheral region in the width direction at the center position in the longitudinal direction.   9. The absorbent core according to claim 1, wherein the absorbent core extends to an edge of the absorbent pad in the width direction within a range in the longitudinal direction where the low basis weight region is provided. 10. Absorbing pad.

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