JP3244445U - absorbent articles - Google Patents

Abstract

An object of the present invention is to provide an absorbent article that includes a top sheet mainly made of non-heat-fusible fibers and that easily conforms to the shape of the wearer's body. An absorbent article includes an absorbent core 4, a top sheet, and a back sheet. The topsheet mainly contains non-thermal fusible fibers. The absorbent body has a mid-high part 9 disposed on the lateral center side of the excretory part facing area C facing the wearer's excretory part, and is arranged around the mid-high part in the vertical and horizontal directions, and has a lower area than the mid-taka part. It has a peripheral part 10 with a small amount, and left and right notches 11 arranged in the peripheral part and extending laterally inward from the left and right side edges in the lateral direction of the absorber. [Selection diagram] Figure 4

Description

The present invention relates to absorbent articles such as sanitary napkins.

Absorbent articles generally include an absorbent body that absorbs excreted liquid, a top sheet placed on the skin side of the absorbent body, and a back sheet placed on the non-skin side of the absorbent body. As a top sheet, one using a cotton nonwoven fabric is known from the viewpoint of achieving a soft touch and high moisture absorption, and giving the wearer a sense of security due to natural fibers (see Patent Document 1).

JP2009-148328A

On the other hand, since cotton fibers are non-heat-fusible fibers, the fibers are not heat-fused but entangled or adhered to each other when manufacturing a sheet. For this reason, a top sheet made mainly of cotton fibers tends to have lower extensibility in the machine direction during manufacturing than one made mainly of heat-sealable fibers, making it difficult to make it conform to the shape of the wearer's body. was difficult. Therefore, there is a need for an absorbent article that easily conforms to the shape of the wearer's body while having a top sheet made of non-heat-fusible fibers such as cotton fibers.

An object of the present invention is to provide an absorbent article that includes a top sheet mainly made of non-thermal fusible fibers and that easily conforms to the shape of the wearer's body.

The absorbent article according to one embodiment of the present invention has two types of absorbent articles: a vertical direction corresponding to the front-back direction of the wearer, a horizontal direction perpendicular to the vertical direction and corresponding to the left-right direction of the wearer, and a vertical direction and the horizontal direction. perpendicular to each other in the thickness direction, an absorbent body, a top sheet disposed on the skin side of the absorbent body in the thickness direction, and a back sheet disposed on the non-skin side of the absorbent body in the thickness direction. Be prepared.
The top sheet mainly contains non-thermal fusible fibers.
The absorber is
a mid-high portion disposed on the lateral center side of the excretion part facing area facing the wearer's excretion part;
A peripheral portion that is arranged around the mid-high portion in the vertical direction and the horizontal direction and has a lower basis weight than the mid-high portion;
Left and right notches are arranged in the peripheral portion and extend inward in the lateral direction from left and right side edges of the absorbent body in the lateral direction, respectively.

According to the absorbent article of the present invention, it is provided with a top sheet mainly made of non-thermal fusible fibers, and can be made to conform to the shape of the wearer's body.

1 is a plan view of an absorbent article (napkin) according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the absorbent article taken along line II-II in FIG. 1. FIG. FIG. 2 is a cross-sectional view of the absorbent article taken along line III-III in FIG. 1. FIG. It is a top view of the absorber of the said absorbent article. It is a top view of the absorber of the said absorbent article, and is a figure which shows the structure which arrange|positioned the compression part on the absorber. FIG. 6 is a plan view of an absorbent body according to another configuration example of the absorbent article, and is a diagram showing a configuration in which a compressed portion having a different form from that in FIG. 5 is arranged on the absorbent body. FIG. 3 is a cross-sectional view of an absorbent article (napkin) according to a second embodiment of the present invention, showing a cross section at the same position as FIG. 2; It is a top view of the absorber of the said absorbent article. It is a top view of the absorber based on the other structural example of the said absorbent article. FIG. 3 is a cross-sectional view of an absorbent article (napkin) according to a third embodiment of the present invention, showing a cross-section at the same position as FIG. 2; It is a top view of the absorber of the said absorbent article.

Embodiments of the present invention will be described below with reference to the drawings.

<First embodiment>
[Overall composition of napkin (absorbent article)]
The absorbent article 1 according to the first embodiment of the present invention includes a main body M and a pair of wing parts W, as shown in FIG. The absorbent article 1 is configured as a sanitary napkin, and is hereinafter referred to as the napkin 1. Note that the napkin 1 does not need to include the wing portion W.
The napkin 1 has a vertical direction X that corresponds to the front-back direction of the wearer and a horizontal direction Y that corresponds to the left-right direction of the wearer and is orthogonal to the vertical direction X. Furthermore, the napkin 1 has a thickness direction Z that is orthogonal to both the longitudinal direction X and the lateral direction Y.
In this specification, "the inside in the horizontal direction Y" means the side approaching the vertical center line CL that bisects the main body M in the horizontal direction Y, and "the outside in the horizontal direction Y" means the side from the vertical center line CL. It means the side that goes away.
As used herein, "front" means the front in the longitudinal direction X, that is, the direction toward the ventral side of the wearer. Similarly, "rear" means the rear in the longitudinal direction X, that is, the direction toward the back of the wearer.
In this specification, with respect to the thickness direction Z, the side closer to the wearer's skin when worn is sometimes expressed as the upper or skin side, and the side closer to clothing is sometimes expressed as the lower or non-skin side.
In this specification, "planar view" means a planar view viewed from the thickness direction Z.

The main body M extends along the longitudinal direction X and is arranged on the inner surface of the wearer's clothing. The main body M has a top sheet 2, an absorbent body 4, and a back sheet 3, which will be described later, laminated in the thickness direction Z, and has the function of absorbing the wearer's excretory fluids such as menstrual blood (hereinafter also referred to as "liquid"). have
The wing portion W is disposed on the outer side in the lateral direction Y of the excretory portion facing region C of the absorbent body 4, which will be described later, and protrudes outward from the main body M in the lateral direction Y.

As shown in FIG. 2, the napkin 1 includes an absorbent core 4, a top sheet 2, a back sheet 3, and left and right side sheets 5. These members are appropriately joined and integrated, for example, by joining with an adhesive, heat sealing, etc., and by pressing in a pressing section 6, which will be described later.

The absorbent body 4 extends along the longitudinal direction X and is disposed between the top sheet 2 and the back sheet 3. The absorber 4 absorbs liquid from the skin-facing surface 4a on the side of the top sheet 2, diffuses it internally, and retains the liquid. Note that the surface of the absorbent body 4 on the back sheet 3 side is defined as a non-skin facing surface 4b.
The absorbent core 4 includes, for example, an absorbent core 7 and a core wrap sheet 8.
The absorbent core 7 may be formed of a fiber aggregate made of hydrophilic fibers such as pulp fibers, or may have a structure in which the fiber aggregate holds a water-absorbing polymer. .
The core wrap sheet 8 is a sheet that covers the absorbent core 7, and has a function of, for example, maintaining the shape of the absorbent core 7. The core wrap sheet 8 is made of, for example, thin and soft paper such as tissue paper, liquid-permeable nonwoven fabric, or the like.
Note that the absorbent body 4 does not need to have the core wrap sheet 8.

The topsheet 2 is arranged on the skin side (upper side) of the absorber 4 in the thickness direction Z. The top sheet 2 is a liquid-permeable sheet material, and includes non-thermal fusible fibers as described below.

The back sheet 3 is arranged on the non-skin side (lower side) in the thickness direction Z of the absorbent body 4. The back sheet 3 is joined to the top sheet 2 and the side sheets 5 by heat sealing or the like without using the absorbent body 4, for example, at its periphery. The back sheet 3 may be bonded to the absorbent body 4 with an adhesive or the like.
The back sheet 3 is formed of a sheet material having functions such as low liquid permeability, water vapor permeability, and water repellency, for example. As the sheet material, for example, a thermoplastic resin film, a laminate of the film and a nonwoven fabric, or the like can be used.
Note that an adhesive part (not shown) may be provided on the outer surface of the back sheet 3 to fix the main body M and the wing part W to clothing.

The left and right side sheets 5 are arranged outside the top sheet 2 in the lateral direction Y. The material for the side sheet 5 is preferably a sheet material with lower hydrophilicity than the top sheet 2, and specifically, nonwoven fabrics, film materials, and laminate structures of nonwoven fabric and film materials that are lower in hydrophilicity than the top sheet 2. Examples include sheets.

[Structure of top sheet]
The topsheet 2 mainly contains non-heat-fusible fibers from the viewpoint of achieving a soft touch and high hygroscopicity.
"The top sheet 2 mainly contains non-thermal fusible fibers" means that the top sheet 2 contains 90% by mass or more of non-thermal fusible fibers. The top sheet 2 preferably contains 95% by mass or more, more preferably 100% by mass of non-thermal fusible fibers, and may be composed only of non-thermal fusible fibers.
"Non-thermal fusible fiber" means a fiber that does not melt or fuse even when heated. Since the topsheet 2 mainly contains non-heat-fusible fibers, even when the topsheet 2 is configured as a nonwoven fabric sheet, fusion points between the fibers are unlikely to be formed, and a soft texture can be obtained.
In the present invention, the non-thermal fusible fibers may be natural fibers or synthetic fibers, and specific examples include cotton fibers, silk fibers, rayon fibers, polynosic fibers, cellulose fibers other than cotton fibers (hemp, coconut, kraft pulp, etc.). , straw), recycled fibers, and semi-synthetic fibers such as acetate rayon. In particular, the non-thermal fusible fiber is preferably cotton fiber from the viewpoint of providing a soft feel and high hygroscopicity as well as providing a sense of security to consumers.

The top sheet 2 is composed of a woven fabric or a nonwoven fabric mainly composed of non-thermal fusible fibers, and is particularly preferably composed of a nonwoven fabric. Examples of such nonwoven fabrics include spunlace nonwoven fabrics, resin bond nonwoven fabrics, needle-punched nonwoven fabrics, etc. from the viewpoint of interlacing or adhering non-thermal fusible fibers, and in particular, from the viewpoint of interlacing by taking advantage of the texture of non-thermal fusible fibers. Therefore, spunlace nonwoven fabric is preferred.
Furthermore, the napkin 1 (absorbent article) has the following features from the viewpoint of inducing deformation that conforms to the wearer's body shape without requiring excessive stretching, even when non-heat-sealable fibers are used for the top sheet 2. The absorber 4 has the following configuration.

[Configuration of absorber]
As shown in FIG. 4, the absorbent body 4 is divided into a front region F, an excretion part facing region C, and a rear region R along the longitudinal direction X.
The excretory part facing area C is an area that faces the wearer's excretory part when worn, and is an area where a mid-high part 9, which will be described later, is arranged. When the absorbent article is the napkin 1, the excretory part is the vaginal opening.
The front region F is a region arranged in front of the excretory part facing region C, and faces the front of the wearer's excretory part when worn.
The rear region R is a region arranged behind the excretory part facing region C, and faces the rear of the wearer's excretory part when worn.
Here, when worn means a state where the normal proper wearing position (the expected wearing position of the napkin 1) is maintained.

In order to improve absorbency and fit in the excretion part facing area C, the absorbent body 4 has a middle high part 9 disposed on the center side in the horizontal direction Y of the excretion part facing area C, and a middle high part 9 arranged in the vertical direction X and the horizontal direction of the middle high part 9. A peripheral portion 10 disposed around the direction Y.
"The central side of the excretion part facing area C in the horizontal direction Y" means the side of the excretion part facing area C that is close to the vertical center line CL. As shown in FIG. 4, the mid-high portion 9 is arranged to extend from side to side in the horizontal direction Y across the vertical center line CL.

As shown in FIG. 2, the middle portion 9 is a region of high basis weight in the absorber 4, and preferably includes a region thicker than the surrounding portion 10. For example, the middle portion 9 is a region where the absorbent core 7 protrudes upward or downward from the surrounding portion 10 in the thickness direction Z.

As shown in FIG. 4, the middle portion 9 includes a front end portion 9a located most forwardly and a rear end portion 9b located most rearward, and extends over the entire length of the excretion part facing region C in the longitudinal direction X. The shape of the middle portion 9 in plan view is not particularly limited, and can be appropriately selected from, for example, a polygonal shape or a shape close to it, a circular shape, an elliptical shape, an oval shape, or other shapes.
The boundary between the excretion part facing area C and the front area F is a straight line portion that touches the front end 9a of the middle portion 9 and extends in the lateral direction Y. The boundary between the excretion part facing area C and the rear area R is a straight line portion that touches the rear end 9b of the middle portion 9 and extends in the lateral direction Y.

The peripheral portion 10 is a region that extends across the outer region in the lateral direction Y of the mid-high portion 9 in the excretion part facing region C, the front region F, and the rear region R. The peripheral part 10 is a region having a lower basis weight than the middle part 9, and preferably has a thinner thickness than the middle part 9. In other words, the absorbent body 4 has a structure in which a middle portion 9 having a high basis weight and high rigidity is surrounded by a peripheral portion 10 having low rigidity.

As shown in FIG. 4, the absorbent core 4 further has left and right notches 11 arranged in the peripheral part 10 from the viewpoint of controlling deformation of the peripheral part 10.
The left and right notches 11 extend inward in the lateral direction Y from the left and right side edges 4s of the absorbent body 4 in the lateral direction Y, respectively. "The notch portion 11 extends inward in the lateral direction Y from the side edge 4s" means that each notch portion 11 as a whole extends from the side edge 4s inward in the lateral direction Y. It is not limited to the aspect in which it extends parallel to the .
The left notch 11 is a notch that extends inward in the lateral direction Y from the left side edge 4s, and the right notch 11 is a notch that extends inward in the lateral direction Y from the right side edge 4s. These notches 11 may be arranged apart from each other in the lateral direction Y, or may be connected at the center of the absorbent body 4 in the lateral direction Y, as will be described in detail later.
In the example shown in FIG. 4, the left and right notches 11 are spaced apart from each other in the horizontal direction Y, and each includes an inner end portion 11e in the horizontal direction Y. The inner end portion 11e is a portion of each cutout portion 11 that is furthest inward in the lateral direction Y from the side edge 4s serving as the starting point.

As shown in FIG. 3, the cutout portion 11 may be formed at least in the absorbent core 7. The core wrap sheet 8 is wound in the horizontal direction Y of the absorbent core 7 so as to cover the front and back sides of the absorbent core 7, for example, but it may be cut or cut at the cutout portion 11, or may not be cut out. You don't have to. FIG. 3 shows a configuration in which the core wrap sheet 8 is cut out at a notch 11.
Note that, as shown in FIGS. 1 and 3, from the viewpoint of covering the entire absorber 4, it is preferable that the topsheet 2 overlaps the left and right notches 11 in a plan view. Thereby, the topsheet 2 becomes more susceptible to the deformation of the absorber 4, which will be described later, and is more easily guided into a preferable shape.

The cutout portion 11 may be, for example, a core-absent portion where the constituent material of the absorbent core 7 is locally present at the side edge 4s, or where the constituent material of the absorbent core 7 is locally small and thick at the side edge 4s. Either the thin part.
"The constituent material of the absorbent core 7 does not exist" means that the main body of the absorbent core 7 does not exist, but there are fibers protruding outward from the periphery of the absorbent core 7 and constituent materials separated from the absorbent core 7. This includes an aspect in which a part of is partially present.
The thin portion is a region having a lower basis weight than other regions of the peripheral portion 10.

The shape of each notch 11 is not particularly limited, and examples include a substantially triangular shape, a substantially quadrangular shape, a part of a circle or an ellipse, a part of an oval shape, and other shapes. In the example shown in FIG. 4, each notch 11 has a substantially semicircular shape, and the inner end 11e is formed by a part of a curve.
The left and right notches 11 are preferably formed symmetrically with respect to the vertical center line CL, but may be asymmetrically formed.

From the viewpoint of promoting the deformation of the absorbent body 4 in the surrounding area 10, the left and right notches 11 are preferably arranged at least one of the front and rear sides of the middle high part 9, and both the front and rear sides of the middle high part 9. It is more preferable that the
Moreover, the absorbent body 4 is not limited to the example having a pair of left and right notches 11, but may have multiple pairs of notches 11.
A more detailed arrangement example of the notch portion 11 will be described later.

In the above configuration, by arranging the notch part 11 in the peripheral part 10, (1) the middle high part 9, (2) the area in the peripheral part 10 where the notch part 11 is not arranged, and (3) the peripheral part. The rigidity of the absorbent body 4 decreases in stages in the order of the regions in which the notch portions 11 are arranged.
As a result, as described below, bending deformation of the absorbent body 4 in the horizontal direction Y and the vertical direction It becomes easier to deform.
In the following description, "bending deformation in the lateral direction Y" means a deformation in which the sheet is bent from a folding axis along the vertical direction X as a starting point. Moreover, the bending rigidity in the bending deformation is referred to as "bending rigidity in the lateral direction Y".
Similarly, “bending deformation in the longitudinal direction Moreover, the bending rigidity in the bending deformation is referred to as "bending rigidity in the longitudinal direction X."
Further, a straight line extending parallel to the horizontal direction Y is referred to as a "horizontal line", and a straight line extending parallel to the vertical direction X is referred to as a "vertical line".

First, attention will be paid to the bending rigidity of the absorbent body 4 in the lateral direction Y.
The bending rigidity in the lateral direction Y in the peripheral part 10 is lower than the bending rigidity in the middle and high part 9, which is a high rigidity part. Furthermore, the bending rigidity along the virtual vertical line VL1 (see FIG. 4) passing through the notch 11 is compared to the bending rigidity in the middle and high part 9 due to the presence of the notch 11, which is a low-rigidity part. can be significantly reduced. This makes it easier for the vertical line VL1 passing through the notch 11 and its vicinity in the surrounding portion 10 to more easily function as a folding axis in bending deformation in the lateral direction Y. By inducing such bending deformation in the absorbent body 4, the vicinity of the left and right side edges 4s stand gently upward in the thickness direction Z, making it easier to follow both sides of the wearer's excretory area.
Next, attention will be paid to the bending rigidity of the absorbent body 4 in the longitudinal direction X.
The bending rigidity in the vertical direction X on the virtual horizontal line VL2 (see FIG. 4) passing through the left and right notches 11 is due to the existence of the notch 11, which is a low-rigidity part, in the surrounding area that does not pass through the notch 11. The bending stiffness is lower than that of . Thereby, the horizontal line VL2 passing through the notch portion 11 and the vicinity thereof can easily function as a folding axis in bending deformation in the vertical direction X. By inducing such bending deformation in the absorbent body 4, the front region F and/or the rear region R gently stand up in the upper side in the thickness direction Z, and the front region F and/or the rear region R stand in the front and/or rear region of the wearer's excretory area. It becomes easier to follow.
In this way, the cutout portion 11 forms a folding axis along the horizontal direction Y and the vertical direction X in the absorbent core 4, making it easier for the absorbent core 4 to deform into a gently curved shape that wraps around the excretory portion. The topsheet 2, which mainly contains non-thermal fusible fibers, is not suitable for deformation that causes it to stretch significantly, but due to the above deformation of the absorber 4, the topsheet 2 is also induced to curve gently, causing the topsheet 2 to become unforced. It transforms without any problem. Therefore, the topsheet 2 is also induced to deform in accordance with its characteristics, making it easier for the entire napkin 1 (absorbent article) to deform along the wearer's body shape.
As described above, the napkin 1 (absorbent article) of the present invention not only provides the benefits of non-heat-sealable fibers such as reduced stuffiness and soft touch, but also induces the above deformation, thereby providing High fit and comfort are maintained even during intense movement or long-term use.

[Example of placement of cutout]
Hereinafter, a preferred arrangement example of the notch portion 11 will be described.
In addition, in the following explanation, "the notch part 11 is arranged in a certain area of the absorbent body 4" means that 50% or more of the maximum length of the notch part 11 along the longitudinal direction means that it is placed in

As shown in FIG. 4, the left and right notches 11 preferably include left and right front notches 11a arranged in front of the middle portion 9. As shown in FIG. Since the front of the middle high part 9 becomes the front region F, it is preferable that the front notch portion 11a is arranged in the front region F.
In this configuration, the horizontal line VL21 passing through the left and right front notches 11a is arranged so as not to pass through the middle and high portions 9, but through the front notches 11a and the surrounding area 10, which are low-rigidity parts. As a result, the bending rigidity in the vertical direction X at the horizontal line VL21 is sufficiently reduced. Therefore, the horizontal line VL21 and its vicinity can function more reliably as a folding axis in the bending deformation in the vertical direction X. Further, by arranging the left and right front notches 11a in the front region F, the absorbent body 4 can easily curve along the curved shape in front of the wearer's excretory part. Therefore, the fit of the napkin 1 (absorbent article) in front of the excretory area is improved.

Moreover, as shown in FIG. 4, it is preferable that the left and right notches 11 include left and right rear notches 11b arranged at the rear of the middle high part 9. Since the rear part of the middle high part 9 becomes the rear region R, it is preferable that the rear notch part 11b is arranged in the rear region R.
In this configuration, the horizontal line VL22 passing through the left and right rear notches 11b is arranged so as not to pass through the mid-high portion 9 but through the rear notch 11b and the surrounding area 10, which are low rigidity parts. As a result, the bending rigidity in the vertical direction X at the horizontal line VL22 is sufficiently reduced. Therefore, the horizontal line VL22 and its vicinity can more reliably function as a folding axis in bending deformation in the vertical direction X. Further, by arranging the left and right rear notches 11b in the rear region R, the absorbent body 4 can easily curve along the curved shape behind the wearer's excretory region. Therefore, the fit of the napkin 1 (absorbent article) at the rear of the excretion area is improved.

Furthermore, as shown in FIG. 4, it is more preferable that the left and right notches 11 include both left and right front notches 11a and left and right rear notches 11b.
As a result, the folding axes for bending deformation in the longitudinal direction X are arranged at the front and rear of the mid-high portion 9, making it easier for the absorbent body 4 to curve along the body shape in front and behind the excretory part.
Further, regarding bending deformation in the lateral direction Y, a virtual vertical line VL1 passing through the plurality of notches 11 can be set, and the bending rigidity at this vertical line VL1 can be further reduced. Therefore, the vertical line VL1 and its vicinity can function more reliably as a folding axis in bending deformation in the lateral direction Y.
In this way, in the above configuration, the absorbent core 4 is even more likely to curve not only at the front and rear of the middle high portion 9 but also at the lateral Y side portion of the middle high portion 9. As a result, the napkin 1 (absorbent article) equipped with the top sheet 2 mainly containing non-thermal fusible fibers is induced to deform into a shape that wraps around the excretory area from the front, back, left and right, improving the fit and The feeling of wearing is further enhanced.

Furthermore, as shown in FIG. 4, it is more preferable that the left and right rear notches 11b are disposed in an area within 20 mm from the rear end 9b of the middle portion 9 in the longitudinal direction X.
"A region within 20 mm rearward in the longitudinal direction

In the above configuration, since the horizontal line VL22 passing through the rear notch portion 11b is arranged near the rear end portion 9b of the mid-high portion 9, bending deformation in the vertical direction A folding axis is provided. This induces bending deformation in the longitudinal direction X in the absorber 4 in accordance with the curved shape of the rear portion of the excretion portion.
Further, in the rear region R, a region that extends further rearward than the rear notch portion 11b is provided. The bending rigidity along the virtual horizontal line VL3 extending in the region is higher than the bending rigidity along the virtual horizontal line VL22 passing through the rear notch portion 11b. That is, in the rear region R, a region with locally low bending rigidity is provided near the rear end portion 9b of the middle high portion 9, and a decrease in the bending rigidity of the entire region behind the region is suppressed. Thereby, even if the absorbent body 4 has a rear region R that is long in the longitudinal direction X, undesirable deformation such as wrinkles or twisting of the rear region R is suppressed.

Similarly, from the viewpoint of inducing more preferable deformation in the front area F, the left and right front notches 11a are also arranged in an area within 20 mm in the longitudinal direction X forward from the front end 9a of the middle high part 9 in the peripheral area 10. It is more preferable that
"A region within 20 mm in the longitudinal direction X forward from the front end 9a of the mid-high portion 9" means a region within 20 mm forward from the boundary between the front region F and the excretory part facing region C.

[Preferable configuration example of the notch]
As shown in FIG. 4, it is preferable that the left and right notches 11 are spaced apart from each other in the lateral direction Y. In this case, as shown in FIG. 3, it is preferable that the left and right notches 11 be formed in the absorbent core 7 and not covered by the core wrap sheet 8.
"The left and right notches 11 are arranged apart from each other in the lateral direction Y" means that the inner ends 11e of the left and right notches 11 are visible, and the inner ends 11e are This means that they are spaced apart from each other. In this configuration, the inner end 11e of the left notch 11 is located in the region to the left of the longitudinal center line CL of the absorbent core 4, and the inner end 11e of the right notch 11 is located in the region to the left of the longitudinal center line CL of the absorbent core 4. It is located in the area to the right of the vertical center line CL.

Here, as shown in FIG. 3, the core wrap sheet 8 has a skin side region 8a disposed on the skin side of the absorbent core 7, and a non-skin side region 8b disposed on the non-skin side of the absorbent core 7. and, including.
"The left and right notches 11 are not covered by the core wrap sheet 8" means that the side edges of the notch 11 are not covered by the core wrap sheet 8, and the skin side area 8a of the core wrap sheet 8 and This means that the non-skin side regions 8b are spaced apart from each other in the thickness direction Z in the cutout portion 11. It is preferable that the skin-side region 8a and the non-skin-side region 8b of the core wrap sheet 8 do not extend into the notch portion 11.
Such an absorbent body 4 can be manufactured, for example, by wrapping a core wrap sheet 8 around the skin side and non-skin side of an absorbent core 7 having a substantially uniform width in the lateral direction Y, and then wrapping the core wrap sheet 8 around the skin side and non-skin side of the absorbent core 7 having a substantially uniform width in the lateral direction Y. It is formed by cutting out the absorbent core 7 and core wrap sheet 8 all at once.

Since the cutout portion 11 is not covered with the core wrap sheet 8, the degree of freedom in deforming the absorbent core 7 in the cutout portion 11 and its vicinity is increased. Thereby, the bending deformation of the absorbent body 4 along the folding axis passing through the above-described notch portion 11 is promoted more effectively, and preferable deformation of the absorbent body 4 is easily induced.

[Example of composition of middle and high school section]
As shown in FIG. 4, when the left and right notches 11 are arranged apart from each other in the lateral direction Y, the middle high portion 9 is located inside the inner end 11e of the notch 11 in the lateral direction Y. It is preferable that the
"The middle high part 9 is disposed on the inner side of the inner end 11e in the lateral direction Y" means that when a virtual vertical line is drawn through the inner end 11e, the middle high part 9 is located at the outermost side in the lateral direction Y. This means that the portion is located inside the vertical line in the horizontal direction Y.

In the above configuration, a band-shaped region along the vertical direction X in which the notch portion 11 is not arranged is provided in the peripheral portion 10 on the outer side of the middle portion 9 in the horizontal direction Y. The bending rigidity along the virtual vertical line VL4 extending in the region is higher than the bending rigidity along the virtual vertical line VL1 passing through the notch 11. Due to the difference in bending rigidity between the vertical line VL4 and the vertical line VL1, the vertical line VL1 passing through the notch 11 and its vicinity can more reliably function as a folding axis in bending deformation in the lateral direction Y. Therefore, bending deformation starting from the folding axis is more reliably induced in the absorbent body 4, and the vicinity of the left and right side edges 4s can more easily follow both sides of the wearer's excretory area.

[Example of configuration of pressing section]
As shown in FIGS. 1 and 5, the napkin 1 (absorbent article) further includes a compressed portion 6 formed on the topsheet 2 and the absorbent core 4 and arranged in the peripheral portion 10 and extending in the longitudinal direction X. is preferred. The compressed portion 6 is a portion where the topsheet 2 and the absorbent body 4 are compressed in the thickness direction Z, and is formed by, for example, compression with or without heat, or embossing such as ultrasonic embossing.
"The compressed part 6 extends in the longitudinal direction X" means that the compressed part 6 as a whole extends from the front to the rear, and includes forms in which it is curved, bent, etc. Further, the compressed portion 6 may be formed by forming a row of a large number of discontinuous recesses (for example, point embossing or line embossing).

It is preferable that the pressing portions 6 are arranged in pairs on the left and right sides with the middle high portion 9 interposed therebetween. Furthermore, the compressed portion 6 extends from a region in front of the notch portion 11 to a region behind the notch portion 11 in the peripheral portion 10 . For example, the compressing part 6 extends in the longitudinal direction X from the front region F through the excretion part facing region C to the rear region R. It is preferable that the left and right pressing parts 6 are connected to each other at the front and rear ends and have a shape that surrounds the middle and high part 9 as a whole.

The compressed portion 6 not only exhibits a leakage prevention effect due to capillary action, but also has higher rigidity than the surrounding area, forming a highly rigid portion. Thereby, a rigidity difference is formed in the absorbent body 4, and favorable deformation is easily induced in the absorbent body 4.

As shown in FIGS. 5 and 6, it is preferable that the left and right pressing parts 6 have discontinuous parts 6a formed discontinuously in the longitudinal direction X. The discontinuous portion 6a may be, for example, either an interrupted portion where the compressed portion 6 is interrupted in the vertical direction X by 4 mm or more, or a bent portion where the compressed portion 6 is bent in the horizontal direction Y.
In the example shown in FIG. 5, the discontinuous portion 6a of the compressing portion 6 is constituted by an interrupted portion.
FIG. 6 shows an absorbent body 4 according to a modification of FIG. 5. In FIG. In this example, the discontinuous portion 6a of the compressing portion 6 is constituted by a bent portion. The discontinuous portion 6a has a constricted shape in which the left and right compressed portions 6 are convexly bent inward in the lateral direction Y.

In such a discontinuous portion 6a, the compressed portion 6, which is a high-rigidity portion, is interrupted, or the extending direction of the compressed portion 6 changes significantly, so that the bending rigidity in the longitudinal direction X locally decreases.
For example, as shown in FIG. 5, when the discontinuous portion 6a is an interrupted portion, a difference in rigidity is formed between the compressed portion 6 before and after the interrupted portion and the unsqueezed interrupted portion. This difference in rigidity forms the starting point of deformation, and a virtual horizontal line passing through the discontinuous part (discontinuous part 6a) of the left and right compressed parts 6 and the vicinity thereof can become the folding axis of the bending deformation in the longitudinal direction X.
Further, as shown in FIG. 6, when the discontinuous part 6a is a bent part, the structure is such that the non-squeezed part (low rigidity part) around the squeezed part 6 locally enters in the lateral direction Y at the bent part. be done. As a result, since the low-rigidity part that has entered is likely to become the starting point of deformation, the virtual horizontal line passing through the bent part and its vicinity can become the folding axis of the bending deformation in the longitudinal direction X.

From the viewpoint of promoting bending deformation in the longitudinal direction It is preferable that it is arranged so as to overlap with a virtual band-shaped or linear region VR extending in the lateral direction Y through the portion 6a.
"A virtual band-shaped or linear region VR extending in the horizontal direction Y through the discontinuous portion 6a" means that the width in the vertical direction X is the length of the discontinuous portion 6a in the vertical direction It means a virtual band-like or linear region that extends linearly.
For example, when the discontinuous portion 6a is an interrupted portion as shown in FIG. 5, the width of the region VR in the vertical direction X corresponds to the length in the longitudinal direction X of the interrupted portion of the discontinuous portion 6a, This is a band-shaped area extending in the horizontal direction Y. In FIG. 5, the region VR is indicated by a diagonal line pattern.
Alternatively, as shown in FIG. 6, when the discontinuous portion 6a is a bent portion, the region VR is a linear region passing through the portion where the left and right pressing portions 6 are bent in the lateral direction Y. In FIG. 6, the region VR is indicated by a thick dashed line.

With the above configuration, the virtual horizontal line VL2 passing through the left and right notches 11 and the region VR are arranged to overlap or be close to each other in plan view. Thereby, the bending deformation of the absorber 4 in the vertical direction X at and near the horizontal line VL2 is further promoted by the region VR including the discontinuous portion 6a. Therefore, even in the napkin 1 (absorbent article) using the top sheet 2 mainly containing non-heat-fusible fibers, deformation along the front or rear curved shape of the wearer's excretory area can be more effectively induced. , fit and comfort are improved.

[Example of configuration of side sheet and cutout]
The napkin 1 (absorbent article) includes the left and right side sheets 5 as described above.
As shown in FIGS. 1 to 3, the left and right side sheets 5 are arranged on both sides of the top sheet 2 in the lateral direction Y on the skin side in the thickness direction Z. "Both sides of the topsheet 2 in the lateral direction Y" means the left and right areas when the topsheet 2 is divided into three equal parts in the lateral direction Y. The left and right side sheets 5 are arranged so as to overlap at least a portion of both sides of the top sheet 2 in the lateral direction Y in a plan view.

Furthermore, as shown in FIGS. 1 and 3, it is preferable that the left and right side sheets 5 overlap the left and right notches 11 in a plan view. "The left and right side sheets 5 overlap the left and right notches 11 in a plan view" means that the side sheets 5 overlap at least a portion of the notches 11 in a plan view.

In the above configuration, when the vicinity of the side edge 4s of the absorbent body 4 is curved by the folding axis passing through the cutout portion 11, the left and right side sheets 5 can be deformed along both sides of the wearer's excretory area. By arranging the side sheet 5 so as to overlap at least a portion of the cutout portion 11, the area on the folding axis and on the outside in the lateral direction Y can be configured to be bulky. Therefore, when the absorbent body 4 is deformed into the above-mentioned curved shape, the left and right side sheets 5 tend to come into close contact with both sides of the excretion part, and the fit of the napkin 1 (absorbent article) to both sides of the excretion part becomes more effective. can be enhanced.

[Detailed configuration example of top sheet]
It is preferable that the top sheet 2 is composed only of water-absorbing non-heat-fusible fibers.
"Having water absorption" means having the property of absorbing liquid, and specifically, the moisture content measured by the following measurement method is 6% or more, preferably 10% or more. It means that.
Examples of non-heat-fusible fibers having water absorption properties include cotton fibers and cellulose fibers other than cotton fibers.

The method for measuring moisture content will be explained below. The moisture content is calculated by applying the moisture content test method of JIS P8203. That is, after leaving the fiber sample in a test room at a temperature of 40° C. and a relative humidity of 80% RH for 24 hours, the weight W (g) of the fiber sample before absolute drying treatment is measured in the room. Thereafter, the fiber sample is left to stand for 1 hour in an electric dryer (for example, manufactured by Isuzu Seisakusho Co., Ltd.) at a temperature of 105±2° C. to completely dry the fiber sample. After the bone-dry treatment, in a test room under standard conditions at a temperature of 20 ± 2°C and a relative temperature of 65 ± 2%, the fiber sample was wrapped in Saran Wrap (registered trademark) manufactured by Asahi Kasei Corporation and wrapped in Si silica gel (for example, Toyota (manufactured by Kako Co., Ltd.) is placed in a glass desigator (for example, manufactured by Techjam Co., Ltd.) and left standing until the fiber sample reaches a temperature of 20±2°C. Thereafter, the constant weight W' (g) of the fiber sample is weighed, and the moisture content of the fiber sample is determined using the following formula.
Moisture content (%) = (W-W'/W') x 100

By configuring the top sheet 2 only from water-absorbing non-heat-fusible fibers, the top sheet 2 can quickly absorb excreted liquid and sweat of the wearer. Furthermore, such a top sheet 2 can also absorb water vapor derived from the liquid or sweat and release the water vapor to an unused portion of the absorbent body 4 (ie, a portion capable of absorbing excreted liquid). This effectively suppresses stuffiness when wearing the napkin 1 (absorbent article), improves the feeling of wearing it, and also suppresses skin problems for the wearer.

In this case, the topsheet 2 is preferably arranged so as to be in contact with the skin-facing surface 4a of the absorber 4. In other words, other members such as a second sheet (sublayer sheet) are not placed between the topsheet 2 and the absorbent body 4, and the topsheet 2 is placed directly on the skin-facing surface 4a of the absorbent body 4. preferable.
Thereby, the topsheet 2 can quickly transfer the absorbed liquid and water vapor to the absorber 4, and the stickiness and wet feeling of the topsheet 2 can be suppressed. Furthermore, by omitting the member between the topsheet 2 and the absorbent body 4, the bending rigidity of the napkin 1 (absorbent article) can be kept low. Therefore, even when the top sheet 2 having the above configuration is used, the bending deformation of the napkin 1 (absorbent article) in the above-mentioned horizontal direction Y and longitudinal direction X can be easily induced more effectively. As a result, the napkin 1 (absorbent article) is more easily deformed to conform to the shape of the body, and the fit and wearing comfort are further improved.

[Specific examples of basis weight of each part of the absorbent core]
The basis weight of the absorbent core 7 in the mid-high portion 9 is preferably 250 g/m ² or more, more preferably 300 g/m ² or more, and preferably 700 g/m ² or less, more preferably 650 g/m ² or less. .
The basis weight of the absorbent core 7 in the surrounding area 10 is preferably 90 g/m ² or more, more preferably 100 g/m ² or more, and preferably 350 g/m ² or less, more preferably 300 g/m ² or less. .
The basis weight of the absorbent core 7 at the notch 11 is preferably 200 g/m ² or less, more preferably 5 g/m ² or less.

A method for measuring the basis weight of the absorbent core 7 will be explained.
Each part of the absorbent core 7 to be measured is cut using a single-edged razor (manufactured by Feather Safety Razor Co., Ltd.) to obtain small pieces having a predetermined area. The weight of these small pieces is measured using an electronic balance (electronic balance GR-300 manufactured by A&D Co., Ltd., accuracy: 4 digits after the decimal point). The basis weight of the small piece is calculated by dividing the obtained weight by the area of the small piece of each part. For each part, the average basis weight of five small pieces is taken as the basis weight.

<Second embodiment>
The absorbent body 4 of the napkin 1 (absorbent article) according to the second embodiment of the present invention has the following low basis weight from the viewpoint of more effectively inducing bending deformation in the folding axis passing through the notch 11. It has vertical grooves 12 and low basis weight lateral grooves 13.
Hereinafter, a description of the same configuration as the first embodiment described above will be omitted, and a different configuration will be described.

[Structure of low basis weight groove]
As shown in FIGS. 7 and 8, the absorbent core 4 of the present embodiment has a low basis weight vertical groove 12 that extends in the vertical direction X in contact with the notch portion 11 and has a lower basis weight than the surrounding portion 10; It further includes a low basis weight lateral groove 13 that extends in the lateral direction Y in contact with the notch portion 11 and has a basis weight lower than that of the surrounding portion 10 .
In the present embodiment, the term "groove having a lower basis weight than the surrounding area" means a region where the constituent material of the absorbent core 7 is locally small and has an elongated depression shape. In addition, the embodiment in which "the constituent material of the absorbent core 7 is locally small" includes the embodiment in which the constituent material of the absorbent core 7 is present at the bottom of the groove, as well as the embodiment in which the constituent material of the absorbent core 7 is present at the bottom of the groove. It also includes aspects that do not exist.
Note that a "groove having a lower basis weight than the surroundings" is also referred to as a "low basis weight groove".
Referring to FIG. 7, the low basis weight vertical grooves 12 and the low basis weight lateral grooves 13 may be grooves that are open on the skin-facing surface 4a side of the absorbent body 4, or may be grooves that open on the non-skin-facing surface 4b side. It may also be a groove that is open.
With such a configuration, the low basis weight vertical grooves 12 and the low basis weight lateral grooves 13 become regions that have lower rigidity than the surrounding areas and are more easily deformed.

"The low basis weight vertical groove 12 extends in the vertical direction X" means that the low basis weight vertical groove 12 as a whole extends in the vertical direction .
Similarly, "the low basis weight lateral groove 13 extends in the lateral direction Y" means that the low basis weight lateral groove 13 as a whole should extend in the lateral direction Y, and also includes a mode in which at least a portion thereof is curved or meandering. .
Moreover, although it is preferable that the low basis weight vertical grooves 12 and the low basis weight lateral grooves 13 have substantially constant groove widths, they may have regions with different groove widths.

"The low basis weight vertical grooves 12 and the low basis weight lateral grooves 13 are in contact with the notch 11" means that a part of the low basis weight vertical grooves 12 and the low basis weight lateral grooves 13 are in the left or right side of the notch 11. This means that it is in contact with at least one side. For example, the ends of the low basis weight vertical grooves 12 or the low basis weight lateral grooves 13 may be in contact with at least one of the left or right notch portions 11. Alternatively, the side wall of the low basis weight vertical groove 12 or the low basis weight lateral groove 13 may be in contact with at least one of the left or right notch portions 11. Further, at least one of the left-hand side and right-hand side notches 11 may be formed in a part of the bottom of the low basis weight vertical groove 12 or the low basis weight lateral groove 13.

In the above configuration, the low rigidity parts of the notch 11, the low basis weight vertical grooves 12, and the low basis weight lateral grooves 13 work together, so that the bending deformation in the vertical direction X and the horizontal direction Y in the absorber 4 is more reliably achieved. be guided.
Focusing on the bending rigidity in the horizontal direction Y of the absorber 4, the low basis weight vertical groove 12 is arranged in contact with the notch 11, so that the bending rigidity in the horizontal direction Y through the notch 11 is The bending rigidity in the horizontal direction Y in the vertical line is significantly reduced. Thereby, the low basis weight vertical groove 12 can effectively function as a folding axis in bending deformation in the lateral direction Y. Therefore, the vicinity of the left and right side edges 4s becomes easier to stand up on the upper side in the thickness direction Z, and it becomes easier to follow both sides of the wearer's excretory area.
Focusing on the bending rigidity in the longitudinal direction X in the absorber 4, the bending rigidity in the longitudinal direction decreases markedly. Thereby, the low basis weight lateral groove 13 can effectively function as a folding axis in bending deformation in the longitudinal direction X. Therefore, the front region F and/or the rear region R more easily stand up on the skin side in the thickness direction Z, and more easily follow the front and/or rear region of the wearer's excretory area.
In this way, the cutout portions 11, the low basis weight vertical grooves 12, and the low basis weight horizontal grooves 13 make it easier for the absorbent body 4 to form folding axes along the longitudinal direction The gently curved shape that wraps around the body makes it easier to deform. By the above-mentioned deformation of the absorbent body 4, the entire napkin 1 (absorbent article) using the top sheet 2 mainly containing non-thermal fusible fibers can be deformed in a preferable manner according to the body shape of the wearer. be guided by.
In particular, in the napkin 1 of this embodiment shown in FIG. The length of the low basis weight lateral groove 13 in the vertical direction X is shorter than the outer length of the notch 11. Therefore, the cutout portion 11 and the low basis weight lateral groove 13 connected thereto are more easily deformed. Further, it is preferable that the basis weight of the material of the absorbent core 7 is smaller at the cutout portion 11 than at the low basis weight lateral groove 13 because deformation starting from the cutout portion 11 is more likely to be induced.

As shown in FIG. 8, from the viewpoint of inducing bilaterally symmetrical deformation, the absorber 4 has two low basis weight vertical grooves 12 on the left side that are in contact with the notch part 11 on the left side and one on the right side as the low basis weight vertical grooves 12. It is preferable to have a low basis weight vertical groove 12 on the right side in contact with the notch portion 11. Furthermore, when the notch portion 11 includes the inner end portion 11e, the low basis weight vertical groove 12 may be arranged so as to be in contact with the inner end portion 11e from the viewpoint of more reliably performing the function as a folding axis. preferable.

As shown in FIG. 8, the low basis weight lateral groove 13 is preferably in contact with both the left notch 11 and the right notch 11 in order to more reliably function as a folding axis. Furthermore, it is more preferable that the low basis weight lateral groove 13 be disposed so as to be in contact with the left and right notches 11 at the left and right ends, and to connect the left and right notches 11. Further, when the cutout portion 11 includes the inner end portion 11e, the low basis weight lateral groove 13 is arranged so as to contact both the left and right inner end portions 11e at the end and connect the left and right inner end portions 11e. is more preferable.

Furthermore, when the notch part 11 includes the front notch part 11a and the rear notch part 11b, it is preferable that the low basis weight vertical grooves 12 and the low basis weight lateral grooves 13 are arranged as follows.
As shown in FIG. 8, the low basis weight vertical groove 12 is preferably in contact with both the front notch 11a and the rear notch 11b from the viewpoint of more reliably functioning as a folding axis. Specifically, the absorbent body 4 has a low basis weight longitudinal groove 12 on the left side that contacts both the left front notch part 11a and the left rear notch part 11b, and the right front notch part 11a and the right rear notch part 12. It is preferable to have a low basis weight vertical groove 12 on the right side that contacts both sides of the notch portion 11b.
The left and right low basis weight vertical grooves 12 can more significantly reduce the bending rigidity in the lateral direction Y in the vertical line passing through the front notch 11a and the rear notch 11b and along the low basis weight vertical groove 12. . Thereby, bending deformation in the lateral direction Y along the low basis weight longitudinal grooves 12 is induced more reliably.

As shown in FIG. 8, the absorbent body 4 has a first low basis weight lateral groove 13a in contact with the front notch 11a and a rear It is preferable to have a second low basis weight lateral groove 13b in contact with the notch portion 11b. It is more preferable that the first low basis weight lateral groove 13a is disposed so as to be in contact with both the left and right front notches 11a at the left and right ends, and to connect the left and right front notches 11a. It is more preferable that the second low basis weight lateral groove 13b contacts both the left and right rear notches 11b at the left and right ends, and is arranged so as to connect the left and right rear notches 11b.

The first low basis weight lateral grooves 13a more significantly reduce the bending rigidity in the vertical direction X in the horizontal line passing through the front notch 11a and along the first low basis weight lateral grooves 13a. Bending deformation in the longitudinal direction X can be more reliably promoted.
Similarly, the second low basis weight lateral groove 13b more significantly reduces the bending rigidity in the vertical direction X in the horizontal line passing through the rear notch 11b and along the second low basis weight lateral groove 13b. Bending deformation in the longitudinal direction X along 13b can be more reliably promoted.
As a result, the absorbent core 4 can more easily curve along the body shape in front and behind the excretion part, and the fit in the front and back of the excretion part can be further improved.

[Other configuration examples of low basis weight grooves]
Furthermore, as shown in FIG. 9, the absorbent body 4 may have a low basis weight groove that is not in contact with the notch 11 in addition to the low basis weight groove that is in contact with the notch 11, and these low basis weight grooves may be provided. It may be divided into a plurality of block parts by basis weight grooves.
In addition, in FIG. 9, the block part corresponding to the middle high part 9 is shown by the dot pattern.

For example, the absorbent body 4 includes a pair of left and right first low basis weight vertical grooves 12a that are in contact with the notch portion 11 and these first low basis weight vertical grooves 12a as grooves extending in the vertical direction X and having a basis weight lower than the surroundings. and one or more second low basis weight vertical grooves 12b arranged between them.
In the example shown in FIG. 9, the absorber 4 has three second low basis weight vertical grooves 12b. Among the three second low basis weight vertical grooves 12b, one second low basis weight vertical groove 12b is arranged on the vertical center line CL so as to pass through the middle part 9, and the two second low basis weight vertical grooves 12b The vertical grooves 12b are arranged along the side edges in the horizontal direction Y of the middle and high portion 9 on the left and right sides of the central second low basis weight vertical groove 12b.

In the above configuration, a folding axis of bending deformation in the lateral direction Y is formed along the first low basis weight vertical groove 12a in contact with the notch portion 11, and also in the lateral direction Y in the second low basis weight vertical groove 12b. bending deformation is induced. As a result, the vicinity of the left and right side edges 4s stands upward in the thickness direction Z with the first low basis weight vertical groove 12a as the folding axis, and the area between them is also horizontally formed by the second low basis weight vertical groove 12b. A gentle curvature in direction Y is induced. As a result, the absorbent body 4 is easily deformed into a curved shape that is gently convex downward in the vicinity of the longitudinal centerline CL. Therefore, the napkin 1 (absorbent article) is easily deformed into an ideal shape that wraps around the excretory area from the left and right sides, and the fit and wearing comfort are further improved.

Furthermore, in the example shown in FIG. 9, the absorber 4 has first low basis weight lateral grooves 13a and second low basis weight lateral grooves 13b in contact with the notch portion 11 as grooves extending in the lateral direction Y and having a basis weight lower than the surroundings. In addition, it has one or more third low basis weight lateral grooves 13c, one or more fourth low basis weight lateral grooves 13d, and one or more fifth low basis weight lateral grooves 13e.
The third low basis weight lateral groove 13c is arranged in front of the first low basis weight lateral groove 13a. In the example shown in FIG. 9, the absorbent body 4 has one third low basis weight lateral groove 13c.
The fourth low basis weight lateral groove 13d is arranged between the first low basis weight lateral groove 13a and the second low basis weight lateral groove 13b. In the example shown in FIG. 9, the absorber 4 has four fourth low basis weight lateral grooves 13d. Among the four fourth low basis weight lateral grooves 13d, the front and rear fourth low basis weight lateral grooves 13d are in contact with, for example, the front end 9a and the rear end 9b of the middle and high portion 9, respectively, and the two fourth low basis weight lateral grooves 13d between them are The four low basis weight lateral grooves 13d are arranged, for example, to cross the middle and high portions 9.
The fifth low basis weight lateral groove 13e is arranged behind the second low basis weight lateral groove 13b. In the example shown in FIG. 9, the absorber 4 has one fifth low basis weight lateral groove 13e.

In the above configuration, a folding axis of bending deformation in the vertical direction , bending deformation in the longitudinal direction X is also induced in the fourth low basis weight lateral groove 13d and the fifth low basis weight lateral groove 13e. As a result, the front region F and the rear region R are curved upward in the thickness direction Z using the first low basis weight lateral groove 13a and the second low basis weight lateral groove 13b as folding axes, and the third low basis weight lateral groove 13c and the fourth low basis weight lateral groove 13c are bent upward in the thickness direction Z. Gentle curvature in the longitudinal direction X is also induced by the low basis weight lateral grooves 13d and the fifth low basis weight lateral grooves 13e. As a result, the absorbent core 4 is more likely to curve along the curved shape of the wearer's body from front to back. Therefore, the napkin 1 (absorbent article) is easily deformed into an ideal shape that wraps around the excretory area from the front and back, and the fit and wearing comfort are further improved.
In particular, in the napkin 1 of this embodiment shown in FIG. 9, the length (outer length) of the cutout portion 11 along the vertical direction The length of the low basis weight lateral groove 13 in the vertical direction X is shorter than the outer length of the notch 11. Therefore, the notch 11 and the low basis weight lateral grooves 13a, 13b connected thereto are more easily deformed than the other low basis weight lateral grooves 13c to 13e. Therefore, the connecting portion between the notch 11 and the first and second low basis weight lateral grooves 13a, 13b tends to be largely deformed, and the other low basis weight lateral grooves 13c to 13e tend to undergo relatively small deformation. Therefore, deformation that follows the shape and movement of the wearer's skin becomes easier.
Moreover, if the basis weight of the material of the absorbent core 7 is smaller at the notch 11 than at the first and second low basis weight lateral grooves 13a, 13b, deformation starting from the notch 11 is likely to be induced, which is preferable. .

[Specific numerical examples of low basis weight grooves]
The basis weight of the absorbent core 7 in the low basis weight groove may be lower than the basis weight of the surrounding portion 10, and is preferably 25 g/m ² or more and 300 g/m ² or less. Note that the basis weight of the absorbent core 7 in the low basis weight groove can be measured in the same manner as the method for measuring the basis weight of the absorbent core 7 described in the first embodiment.
The width of the low basis weight groove is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 10 mm or less, more preferably 5 mm or less. Note that the width of the low basis weight groove means the dimension of the portion perpendicular to the extending direction.
The depth of the low basis weight groove is preferably 0.5 mm or more, more preferably 3 mm or more, and preferably 10 mm or less, more preferably 5 mm or less.

The width of the low basis weight groove is determined by measuring the width at the opening of the low basis weight groove. The absorbent core 7 is placed horizontally, and the opening width is measured by adjusting the measurement magnification and enlarging the opening using a microscope (VHX-1000 manufactured by Keyence Corporation).
Alternatively, the absorbent core 7 is cut using a single-edged razor (manufactured by Feather Safety Razor Co., Ltd.), and the cross section of the cut sample is magnified 20 to 100 times using a microscope (VHX-1000, manufactured by Keyence Corporation). The groove width may be measured by observing with magnification.
In addition, when the low basis weight groove includes portions with different widths, the widths at five locations are measured in the low basis weight groove, and the average value thereof is taken as the width of the low basis weight groove.

<Third embodiment>
The napkin 1 (absorbent article) according to the third embodiment of the present invention has the following features from the viewpoint of effectively forming the starting point of bending deformation in the lateral direction Y of the absorbent body 4 by the notch portion 11 and the compressed portion 6. It has the following configuration.
Hereinafter, a description of the same configuration as the first embodiment described above will be omitted, and a different configuration will be described.

[Configuration of middle and high part and compression part]
As shown in FIGS. 10 and 11, the mid-high portion 9 of this embodiment includes a mid-high central portion 9c disposed on the center side in the lateral direction Y, and left and right central portions 9c disposed on both sides of the mid-high central portion 9c in the lateral direction Y. It has a middle and high side part 9d.
The mid-height central portion 9c may be disposed closer to the vertical center line CL than the mid-height side portions 9d, and preferably extends left and right across the vertical center line CL. The middle and high central portion 9c has a higher basis weight than the surrounding portion 10, as described above.
In addition, in FIG. 11, the middle and high center portions 9c are shown in a coarse dot pattern, and the middle and high side portions 9d are shown in a dense dot pattern.

The mid-height side portions 9d are arranged in contact with the mid-height center portion 9c in the lateral direction Y, and on both sides thereof in the lateral direction Y. The mid-high side portion 9d has a higher basis weight than the surrounding portion 10, similar to the mid-high central portion 9c, but by being compressed in the thickness direction Z, it becomes a thinner and denser region than the mid-high central portion 9c. Become.
In addition, it is preferable that the basis weight of the middle high center part 9c and the middle high side part 9d is the same. For example, it is preferable that the value obtained by dividing the difference between the higher basis weight and the lower basis weight by the higher basis weight of the mid-high central portion 9c and the mid-high side portions 9d is within 20%, and within 10%. It is more preferable that
Due to the above configuration, the middle and high side portions 9d have higher rigidity than the surrounding portion 10 and the middle and high center portion 9c. In other words, the middle and high side portions 9d are regions with very high bending rigidity in the lateral direction Y.

On the other hand, the napkin 1 (absorbent article) is formed on the top sheet 2 and the absorbent core 4, and includes a compressed portion 6 extending in the longitudinal direction X.
The left and right pressing portions 6 are arranged on the outer side of the middle high side portion 9d in the lateral direction Y in the peripheral portion 10 from the viewpoint of reliably providing the folding axis of bending deformation in the lateral direction Y on the outer side of the middle high side portion 9d in the lateral direction Y. It is preferable. In this case, it is preferable that the compressing part 6 extends longer in the longitudinal direction X than the length of the mid-high side part 9d in the longitudinal direction More preferably, it extends in the X direction.

The compressed portion 6 has lower rigidity than the middle and high side portions 9d, but has higher rigidity than other regions of the surrounding portion 10. Therefore, a difference in rigidity is formed between the compressed portion 6 and the region of the peripheral portion 10 adjacent to the compressed portion 6 in the lateral direction Y. Due to this difference in rigidity, the compressed portion 6 and its vicinity tend to become a starting point for deformation.
On the other hand, as described above, the bending rigidity in the lateral direction Y also decreases in the vertical line VL1 passing through the notch portion 11. Therefore, in the peripheral part 10 on the outside in the horizontal direction Y of the middle and high side part 9d, the folding axis of bending deformation in the horizontal direction Y is determined by the vertical line VL1 passing through the cutout part 11 and the compressed part 6 extending in the vertical direction is more likely to form.

In other words, in the above configuration, the rigidity of the mid-high side portion 9d can be further increased, so that the folding axis for bending deformation in the lateral direction Y can be reliably provided in the peripheral portion 10 on the outside of the mid-high side portion 9d in the lateral direction Y. can. Furthermore, in the peripheral portion 10, a bending rigidity difference is formed between the compressed portion 6 and the vertical line VL1 passing through the notch portion 11. Thereby, the folding axis of bending deformation is more reliably provided at the vertical line VL1 having lower bending rigidity and its vicinity. As a result, the left and right side edges 4s of the absorbent body 4 can more reliably deform so as to follow both sides of the wearer's excretory area. Therefore, even in the napkin 1 (absorbent article) using the top sheet 2 mainly containing non-thermal fusible fibers, preferable deformation that follows the shape of the wearer's body is more effectively induced, and the fit and wearability are improved. Feelings are heightened.

<Other embodiments>
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention. For example, the configuration may be a combination of the above embodiments.

For example, the arrangement and planar shape of the cutout portion 11 are not limited to the illustrated example, and can be changed without departing from the gist of the present invention. For example, the notch 11 may be arranged in the excretion part facing region C. Further, the number of notches 11 is not limited to two pairs either.
Further, the arrangement and planar shape of the low basis weight groove and the pressing portion are not limited to the illustrated example.

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

1...Napkins (absorbent articles, sanitary napkins)
2... Top sheet 3... Back sheet 4... Absorber 9... Middle and high part 10... Surrounding part 11... Notch part

Claims (7)

An absorbent body having a longitudinal direction corresponding to the front-back direction of the wearer, a lateral direction orthogonal to the longitudinal direction and corresponding to the left-right direction of the wearer, and a thickness direction orthogonal to the longitudinal direction and the lateral direction. an absorbent article comprising: a top sheet disposed on the skin side in the thickness direction of the absorbent body; and a back sheet disposed on the non-skin side in the thickness direction of the absorbent body,
The top sheet mainly contains non-thermal fusible fibers,
The absorber is
a mid-high portion disposed on the lateral center side of the excretion part facing area facing the wearer's excretion part;
A peripheral portion that is arranged around the mid-high portion in the vertical direction and the horizontal direction and has a lower basis weight than the mid-high portion;
An absorbent article comprising: left and right notches arranged in the peripheral portion and extending inward in the lateral direction from left and right side edges of the absorbent core in the lateral direction. The absorber is
a low basis weight longitudinal groove extending in the longitudinal direction in contact with the notch and having a basis weight lower than the surrounding area;
The absorbent article according to claim 1, further comprising a low basis weight lateral groove that extends in the lateral direction in contact with the notch and has a basis weight lower than that of the surrounding area. The absorbent body includes an absorbent core and a core wrap sheet that covers the absorbent core,
The left and right notches are
are spaced apart from each other in the lateral direction, and
The absorbent article according to claim 1 or 2, wherein the absorbent article is formed on the absorbent core and is not covered by the core wrap sheet. The absorbent article includes:
Further comprising left and right compressed parts extending in the longitudinal direction, formed on the top sheet and the absorbent body and arranged in the peripheral part,
The left and right pressing parts each include a discontinuous part formed discontinuously in the longitudinal direction,
Any one of claims 1 to 3, wherein the left and right notches are arranged so as to overlap, in plan view, a virtual band-shaped or linear region extending in the lateral direction through the discontinuous part. The absorbent article described in . The middle and high school section is
a middle and high center portion disposed on the lateral center side;
further comprising: middle and high side parts that are thinner and higher in density than the middle and high center part, arranged on both sides of the middle and high center part in the lateral direction;
The absorbent article includes:
5 . The absorbent absorbent according to claim 1 , further comprising left and right compressed portions extending in the vertical direction, which are formed on the top sheet and the absorbent body and arranged on the outer sides of the middle and high side portions in the lateral direction. Absorbent articles. The absorbent article includes:
further comprising left and right side sheets disposed on the skin side in the thickness direction on both sides in the lateral direction of the top sheet,
The absorbent article according to any one of claims 1 to 5, wherein the left and right side sheets overlap the left and right notches in a plan view. The top sheet is
Consisting only of the non-thermal fusible fibers having water absorption properties, and
The absorbent article according to any one of claims 1 to 6, wherein the absorbent article is arranged so as to be in contact with a skin-facing surface of the absorbent body.

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