JP5875730B1 - Absorption pad - Google Patents

Abstract

The present invention provides an absorbent pad that reduces an uncomfortable feeling of a wearer at the time of use and easily recovers to an original shape when the wearer opens a leg. An absorbent pad 10 mounted inside a diaper is provided between a topsheet 20, a backsheet 22, and a topsheet 20 and a backsheet 22 and includes an absorbent core 32 made of an absorbent material. And a body 30. The absorber 30 has a peripheral region P and a central region C surrounded by the peripheral region P. The peripheral region P is thinner than the central region C and has higher rigidity than the central region C. The absorber 30 has a pair of low basis weight regions 42 extending along the longitudinal direction L at the boundary between the peripheral region P adjacent to the central region C in the width direction W and the central region C, and the central region C. On the non-skin surface side of the absorbent body 30, a groove 40 extending in the longitudinal direction L at the center in the width direction W is provided. [Selection] Figure 1

Description

  The present invention relates to an absorbent pad attached to the inside of a diaper.

Patent document 1 is disclosing the sanitary napkin provided with the absorber which absorbs a liquid. The sanitary napkin absorbent body includes a pressing groove provided in the center in the width direction and extending in the longitudinal direction, and a pair of other pressing grooves provided on both sides of the pressing groove. This napkin
It is supposed to be deformed into a W shape by being sandwiched between the wearer's legs during use.

Patent document 2 is disclosing the underpants type diaper provided with the absorber which absorbs a liquid. The absorbent body of this pant-type diaper has a two-layer structure including a first layer (lower layer) and a second layer (upper layer) superimposed 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 across the opening of the first layer. The crotch region of the diaper is deformed into a W shape by being sandwiched between the wearer's legs during use.

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

Currently, an absorbent pad to be worn inside the diaper has been developed. In use, such an absorbent pad is placed between the crotch region of the diaper, i.e., between the legs of the wearer. However,
Since such an absorbent pad is attached to the 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 both legs of the wearer, there is a problem that even if the wearer opens both legs, the absorbent pad is difficult to recover to the original shape. If the absorbent pad is kept in a collapsed state when the wearer opens both legs, there may be anxiety that liquid (body fluid) may leak from the absorbent pad, or the liquid may actually leak There is.

Accordingly, there is a demand for an absorbent pad that reduces the uncomfortable feeling of the wearer during use and easily recovers to the original shape when the wearer opens the leg.

The absorption pad which concerns on one aspect is an absorption pad with which the inner side of a diaper is mounted | worn. The absorbent pad is provided between the longitudinal direction, the width direction orthogonal to the longitudinal direction, the top sheet, the back sheet, and the absorbent core including an absorbent core made of an absorbent material. And having. The absorber has a peripheral region and a central region surrounded by the peripheral region. The peripheral region has a thickness thinner than that of the central region and a rigidity higher than that of the central region. The absorber has a pair of low basis weight regions extending along the longitudinal direction at a boundary between the peripheral region adjacent to the central region in the width direction and the central region, and the central region,
And a groove extending in the longitudinal direction at the center in the width direction on the non-skin surface side of the absorber.

The absorption pad which concerns on the said aspect reduces a wearer's discomfort at the time of use, and is easy to recover | restore to an original shape, when a wearer opens a leg.

FIG. 1 is a plan view of an absorbent pad according to an embodiment. 2 is a cross-sectional view of the absorbent pad taken along line F2-F2 of FIG. FIG. 3 is a plan view of the absorber according to the embodiment. FIG. 4 is a plan view of the absorber viewed from the side opposite 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 outer side to the inner side. 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 outer side to the inner side. 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 absorbent pad according to an embodiment will be described with reference to the drawings. The absorption pad of this invention is related with the absorption pad with which the inner side of a disposable diaper is mounted | worn, for example. 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 and the like may differ from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

(1) Configuration of Absorption Pad FIG. 1 is a plan view of an absorption pad according to an embodiment. FIG. 1 shows the absorbent pad in a stretched state. 2 is a cross-sectional view of the absorbent pad taken along line F2-F2 of FIG.
FIG. 3 is a plan view of an absorbent body provided in the absorbent pad. FIG. 4 is a plan view of the absorber viewed from the side opposite 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 side to the rear side (back 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 the “skin side”. Also, when using the side facing away from the wearer's skin,
Sometimes called “non-skin side”.

The absorbent pad 10 includes 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 top sheet 20 covers the absorber 30. The top sheet 20 may be composed of a liquid permeable sheet.

The back sheet 22 is directed to the opposite side of 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 include 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 surface side of the back sheet 22. The side sheet 50 covers the elastic member 54 on the non-skin surface side of the back sheet 22. The elastic member 54 is attached to the back sheet 22 in a state of extending in the longitudinal direction L. Thereby, the peripheral part of the width direction W of the absorption pad 10 will be in the contracted state in a natural state. Here, the natural state means a state where no external force is applied to the absorbent pad 10.

The side sheet 50 extends from the non-skin surface side of the back sheet 22 through the end of the absorbent pad 10 in the width direction W to the top sheet 20 side. An end portion of the side sheet 50 on the surface sheet 20 side is folded back and encloses the elastic member 52. The elastic member 52 is attached to the side seat 50 in a state of extending in the longitudinal direction L. Thereby, the edge part by the side of the surface sheet 20 of the side sheet | seat 50 comprises a standing gather.

The absorber 30 is provided between the top sheet 20 and the back sheet 22. The absorber 30 is
An absorbent core 32 made of an absorbent material is included. The absorbent material constituting the absorbent core 32 can be formed from, for example, hydrophilic fibers, pulp, and superabsorbent polymer (SAP). The absorbent body 30 may have a core wrap 34 that wraps 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 a state where the absorbent pad 10 is extended and a 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 that includes the center of the absorber 30 and does not include the edge of the absorber 30. When the absorbent pad is worn, the central region C is located at the wearer's crotch.

The peripheral area P is an area surrounding the central area C and includes the edge of the absorber 30. The peripheral region P is a region that is thinner than the central region C and has higher rigidity than 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 thickness of the peripheral region P is preferably 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 a “PEACOCK dial thickness gauge J-B manufactured by Ozaki Mfg. Co., Ltd.” having a probe having a diameter of 50 mm. Specifically, the thickness of the measurement site was measured while sandwiching the measurement site of the sample with a circular measurement terminal having a diameter of 50 mm and adjusting the load to be 3.0 gf / cm ² .

Further, 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 rigidity value is defined as a value obtained by dividing a value measured by the Gurley bending resistance by the length of the sample piece. For the measurement of the Gurley bending resistance, no. A 311 Gurley type flexibility tester (manufactured by Yasuda Seiki Seisakusho) is used. This testing machine complies with JIS-L1096. This testing machine is a testing machine that measures the flexibility (bending resilience) of a sample piece. First, the sample piece is attached to the chuck of the movable arm and rotated left and right at a specified speed, the scale when the lower end of the sample piece is separated from the pendulum is read, and the bending resistance S (mN) is based on To 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 the reading of the scale plate, 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 weights (g) of the weights attached to the holes of D ₁ , D ₂ , D ₃ , L is the length of the sample piece (mm), b Is the width (mm) of the sample piece.

In this specification, the sample piece is obtained by cutting the absorbent body of the absorbent pad 10 into a rectangular parallelepiped having a longitudinal direction of 38 mm and a width direction 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. In this way, the Gurley stiffness (mN) per 38 mm length of the sample piece is measured. In addition, as a length direction of a sample piece, although the longitudinal direction (The conveyance direction (MD direction) at the time of manufacture) of the absorption pad 10 is mentioned, for example, it is not limited to this.

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

In order to increase the rigidity of the absorbent body 30 in the peripheral region P, it is preferable that the compressed groove 46 is formed in the absorbent body 30 in the peripheral region P. The compressed 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 surface side of the absorbent body 30. More specifically, the pressing groove 46 may be formed in a straight line along the first direction and the second direction intersecting the first direction. The first direction and the second direction may be inclined with respect to the longitudinal direction L. Instead of this embodiment, the compressed 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 region P has a relatively high rigidity and can easily maintain the original shape, the force received from the side of the absorbent pad caused by the wearer changing the posture is easily transmitted toward the central region 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 extends along the longitudinal direction L. The pair of low basis weight regions 42 is
It is provided at the boundary between the peripheral region P and the central region C adjacent to the central region C in the width direction W.

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 (weight per unit area) 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 area 42 is a concept including an area where the basis weight of the absorbent core 32 is zero. Here, the region that does not substantially include the absorbent core means a region that does not include the absorbent material constituting the absorbent core 32 in design. In other words, the region that does not substantially contain the absorbent core is
It is a concept including a region in which a small amount of absorbent material is mixed during manufacture.

The low basis weight region 42 may be a region 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 region 42 becomes a boundary where the rigidity of the absorbent pad 10 changes. Accordingly, the low basis weight region 42 corresponds to a region where the absorbent pad 10 is easily deformed.

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

The “length”, “width”, and “distance” described in the present specification are values measured in a state where the absorbent pad 10 is stretched until there is no wrinkle.

The absorbent core 32 preferably extends to the edge of the absorbent pad 10 in the width direction W within the range in the longitudinal direction L where the low basis weight region 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 region 42 is provided.

The absorbent pad 10 may have a locking portion 90 that locks to the diaper on the non-skin surface side of the back sheet 22. In FIG. 1, the locking portion 90 is perspectively shown by a dotted line. Locking part 90
Is preferably provided avoiding the region in which the groove 40 is formed in the longitudinal direction L.

As shown in FIG. 2, the top sheet 20 and the absorbent body 30 extend to the outer end in the width direction W in a central portion of the absorbent pad 10, for example, in a range where the central region C exists at least along the longitudinal direction L. Yes. Thereby, even if the thickness of the absorber 30 is reduced, the liquid such as urine diffused to the outer end portion in the width direction W of the absorption pad 10 can be absorbed, so that the liquid hardly leaks from the absorption pad 10. Further, since the topsheet 20 and the absorbent body 30 extend to the outer end portion in the width direction W, relatively high rigidity is maintained up to the outer end portion 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 region C.

(2) Absorbent pad currently worn Next, with reference to FIG.5 and FIG.6, the example of the shape of the absorbent pad 10 currently worn is demonstrated.
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 the outside to the inside in the width direction W. In FIGS. 5 and 6, the pressing groove 46 is not shown for simplification of the drawing.

During use, the absorbent pad 10 is sandwiched between both legs of the wearer and receives a force from the outside toward the inside in the width direction W. When the absorbent pad 10 receives a weak force in the width direction W, the peripheral region P tends to move toward the central region C while the outer portion of the peripheral region P in the width direction W rises upward (see FIG. 5). . The center of the central region C is pressed by the peripheral region P, and is deformed into a convex shape toward the wearer's skin. Since the groove | channel 40 is formed in the non-skin surface side of the center area | region C at this time, the absorber 30 tends to deform | transform into convex shape toward a wearer's skin. Further, since the rigidity of the low basis weight region 42 is low, the absorbent pad 10 is easily bent with the low basis weight region 42 as a base point. 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 outer side in the width direction W to the inner side during mounting, the peripheral region P of the absorbent body 30 is relatively high in rigidity, so that 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 the low basis weight area 42
Is larger than the thickness T2 of the absorbent body 30 in the peripheral region P, even if the absorbent pad 10 is deformed in this way, the thickness of the absorbent pad 10 as a whole 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 diaper in a stretched state. The disposable diaper may be a diaper for adults, for example.

The disposable diaper 1 may have a pant-type structure as an example. The disposable diaper 1 has a waist area applied to the wearer's waist and a crotch area applied to the wearer's crotch. The waistline edges 4, 4 'located on the outer side in the width direction W of the front waistline region are joined to the rear waistline edges 6, 6' located on the outside in the lateral direction W of the rear waistline region S2, respectively. The diaper 1 is formed in a pants shape. The disposable diaper 1 has a pair of leg-hole openings 9 surrounding the wearer's leg in a pant-shaped state. 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 absorbent pad 10 described above is attached to the crotch region of the disposable diaper 1. After the wearer excretes, only the absorbent pad 10 can be replaced. Thereby, a disposable diaper can be used for a long time.

The width W4 of the absorbent pad 10 in the width direction W is the absorber 13 arranged in the crotch region of the diaper.
It is preferably larger than the minimum width W5 in the zero width direction W.

(4) Effects According to the absorbent pad 10 according to the embodiment, the absorbent body 30 includes the peripheral region P and the peripheral region P.
And a central region C surrounded by The peripheral region P is thinner than the central region C and has higher rigidity than the central region C. The absorber 30 has a pair of low basis weight regions 42 extending along the longitudinal direction L at the boundary between the peripheral region P and the central region C adjacent to the central region C in the width direction W.
And in the center area | region C, the groove | channel 40 extended in the longitudinal direction L in the center of the width direction W in the non-skin surface side of the absorber 30 is provided.

Since the thickness of the peripheral area | region P surrounding the center area | region C which is a wearer's excretion part is thin, the absorption pad 1
Since 0 is attached to the inside of the diaper, the discomfort due to the increase in thickness hardly occurs, and the peripheral region P is highly rigid, so even if it receives force from the outside in the width direction W, the shape of the peripheral region P is Easy to maintain. Therefore, when the force that causes the absorbent pad 10 to shrink in the width direction W is removed, the absorbent pad 10 is likely to recover to its original shape because of the highly rigid peripheral region P.

Since the amount of the absorbent material constituting the absorbent core 32 can be reduced by the pair of low basis weight regions 42, even if the absorbent pad 10 is attached to the diaper, the total thickness of the absorbent pad 10 and the diaper can be reduced in the crotch region. Can be reduced. Thereby, a wearer's uncomfortable feeling at the time of use can be reduced. Moreover, since the low basic weight area | region 42 is a comparatively soft area | region, when receiving the force from the width direction W outer side to the inner side, the absorption pad 10 fits a wearer's body on the basis of the low basic weight area 42. It is easy to deform.

Furthermore, since the central region C has a lower rigidity than the peripheral region P and is soft, the central region C is easily deformed so as to fit the wearer's body during use, and does not give the wearer a sense of incongruity. Moreover, the groove | channel 40 formed in the non-skin surface side of the absorber 30 tends to deform | transform so that the center area | region C of the absorption pad 10 may protrude toward a wearer's skin. Thereby, the absorption pad 10 becomes easy to fit a wearer's body at the time of use.

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

According to one embodiment, the absorbent core 32 is 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 during use,
It is preferable to be as thin as possible from the viewpoint of comfort. In addition, the combination with the above-described embodiment makes it possible to achieve both comfort and fit to the body.

Moreover, when the absorption core 32 has a structure of two or more layers, a gap may be generated between the layers as the absorber 30 is deformed when a force is applied from the outside in the width direction W. Therefore, it becomes difficult to maintain the shape of the absorber, and the recoverability of the shape of the absorber may be reduced. 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 region 42 is a region that is substantially free of absorbent material. Thereby, the absorbent pad 10 and the absorbent body 30 are easily deformed at the low basis weight region 42.
Therefore, it becomes easier for the absorbent pad 10 to fit 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). Absorbent pad 1 when worn
When a weak force is applied to 0 from the outside in 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 in the width direction W of the absorbent pad 10 can be further prevented.

According to one embodiment, the width W1 of the low basis weight region 42 in the width direction W is larger than the thickness T2 of the absorber 30 in the peripheral region P. As a result, the absorbent pad 10 can be moved in the width direction W when worn.
When receiving a strong force from the outside to the inside, the peripheral region P of the absorbent body 30 is the absorbent core 3 in the central region C.
2 (see FIG. 6). Therefore, the absorber 30 in the central region C can be deformed so as to fit the body while the entire width of the absorbent pad 10 is reduced. Width W of low basis weight area 42
Since 1 is larger than the thickness T2 of the absorbent body 30 in the peripheral region P, even if the absorbent pad 10 is deformed in this way, the thickness of the entire absorbent pad 10 does not become too large. As a result, the wearer's uncomfortable feeling can be reduced.

In addition, when the absorbent pad 10 receives a strong force from the outside in the width direction W to the inside, the peripheral region P of the absorber 30 is easier to enter under the absorbent core 32 in the center region C in the width direction W.
The width W1 of the low basis weight region 42 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 surface side of the back sheet 22. The locking portion 90 is provided so as to avoid a region where the groove 40 is formed in the longitudinal direction L. Thereby, the area | region in which the groove | channel 40 was formed, and the area | region outside the width direction W of the area | region in which the groove | channel 40 was formed are not latched directly to a diaper. Therefore, it can prevent that the latching | locking part 90 inhibits the deformation | transformation of the absorption pad 10, As a result, the fall of the fitting property to the body of the absorption pad 10 can be suppressed.

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 region 42 in the longitudinal direction L. Thereby, the distance between the position of the edge part of the groove | channel 40 in the longitudinal direction L and the position of the edge part of the low basic weight area | region 42 in the longitudinal direction L becomes long. Therefore, when the absorbent pad 10 is deformed as shown in FIGS. 5 and 6, the deformation of the absorbent pad 10 into the region that does not project from the projecting portion along the longitudinal direction L becomes gradual.

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 in which the low basis weight region 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 relatively rigid region extends to the edge in the width direction W of the absorbent pad 10. Accordingly, 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 regions 42 and the center region C. Thereby, the absorption pad 10 becomes easy to deform | transform so that it may fit a wearer's body at the time of use.

According to one embodiment, on the outer side in the longitudinal direction L than the low basis weight region 42, the boundary 44b between the peripheral region P and the central region C is linear in the width direction W toward the outer side in the longitudinal direction L. It is inclined to. When the boundary of the peripheral region P is a straight line rather than a curved shape, the boundary 44b of the peripheral region P is likely to be a folding base point, and the central region C of the absorbent pad 10 fits the wearer's body. It becomes easy to deform. Moreover, since the absorption pad 10 bend | folds neatly in the boundary 44b of the peripheral area | region P, a wearer's discomfort can be reduced.

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 absorbent body 130 disposed in the crotch region of the diaper. Thereby, when the absorption pad 10 is mounted | worn with a diaper, the both ends of the width direction W outer side of the absorption pad 10 will protrude outside the width direction W of the absorber 130 of a diaper in a crotch region. The force received from the side in the width direction W from the wearer's leg by being sandwiched between both the legs of the wearer is transmitted to the absorbent pad 10 before the absorbent body 130 disposed in the crotch region of the diaper. Therefore, the absorbent pad 1
Since the deformation of 0 is promoted and the absorbent pad 10 fits the body, it is difficult to feel uncomfortable even if the absorbent pad 10 and the diaper are worn.

In the crotch region, the absorbent pad 1 extends to a region wider than the absorbent body 130 of the diaper 1.
Since 0 exists, it becomes difficult for the liquid to leak to the diaper 1. Thereby, 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 modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of this specification is
It is for the purpose of illustration and is not intended to limit the present invention in any way.

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

Claims (9)

An absorbent pad to be worn inside the diaper,
Longitudinal direction,
A width direction orthogonal to the longitudinal direction;
A surface sheet;
A back sheet;
An absorbent body provided between the top sheet and the back sheet and including an absorbent core made of an absorbent material;
The absorber has a peripheral region and a central region surrounded by the peripheral region,
The peripheral region has a thinner thickness than the central region and a rigidity higher than the central region,
The absorber is
A pair of low basis weight regions extending along the longitudinal direction at the boundary between the peripheral region adjacent to the central region in the width direction and the central region;
Wherein the central region, the non-skin side of the absorbent body, have a, a groove extending in the longitudinal direction at the center in the width direction,
The absorbent pad has a locking portion that locks the diaper on the non-skin side of the back sheet,
The said engaging part is an absorption pad provided avoiding the area | region in which the said groove | channel was formed in the said longitudinal direction .   The absorbent pad according to claim 1, wherein the absorbent core has a single layer structure.   The said low basic weight area | region is an absorption pad of Claim 1 or 2 which is an area | region which does not contain the said absorption material substantially.   The absorbent pad according to any one of claims 1 to 3, wherein a distance between the pair of low basis weight regions is shorter than a total width of the peripheral regions in the width direction at a center position in the longitudinal direction.   The absorbent pad according to any one of claims 1 to 4, wherein a width of the low basis weight region in the width direction is larger than a thickness of the absorber in the peripheral region. The length of the said groove | channel in the said longitudinal direction is an absorption pad of any one of Claim 1 to 5 longer than the length of the said low basic weight area | region in the said longitudinal direction. The said absorption core is extended to the edge part of the said absorption pad in the said width direction in the range of the said longitudinal direction in which the said low basic weight area | region was provided, The any one of Claim 1 to 6 Absorption pad. The boundary between the peripheral region and the central region is inclined linearly inward in the width direction toward the outer side in the longitudinal direction outside the low basis weight region in the longitudinal direction. The absorbent pad according to any one of 1 to 7 . The absorbent pad according to any one of claims 1 to 8 , wherein a width of the absorbent pad in the width direction is larger than a minimum width in a width direction of the absorbent body arranged in the crotch region of the diaper.

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