TWI744277B - Absorbent articles - Google Patents

Abstract

Improves the fit to the wearer's buttocks and suppresses the leakage of excrement. The absorbent core (31) of the absorbent article has: a pair of first low basis weight regions (41) each extending from both outer edges of the absorbent core toward the inner side in the widthwise direction, and a rear region along the connecting widthwise direction The center line of the center extends the second low basis weight area (42) in the front-rear direction. The basis weight of the first low basis weight region and the basis weight of the second low basis weight region are lower than the basis weight of the outer edge of the absorbent core in the back domain (S3). A pair of first low basis weight regions (41) are separated in the widthwise direction, and are only arranged in the middle domain (S4) among the central domain (S1), the rear domain (S3), and the middle domain (S4) .

Description

Absorbent articles

The present invention relates to an absorbent article such as sanitary napkins for sanitary use, which is installed in underwear.

An absorbent article with a notch extending from the outer edge of the absorbent body toward the inside in the widthwise direction is disclosed (for example, refer to Patent Document 1). The gaps in Patent Document 1 are provided in plural at intervals in the front-rear direction.

[Advanced Technical Literature] [Patent Literature]

[Patent Document 1] JP 2013-52290 A

In the absorbent article of Patent Document 1, a plurality of notches are formed at intervals in the front-rear direction, and the entire area of the absorbent article is easily deformed through the notch structure in the front-rear direction. Therefore, the entire absorbent article is deformed repeatedly and there is a concern that leakage may occur due to twisting and offset of the absorbent article. Also, in the posterior region that abuts the wearer’s buttocks, the outer side of both the posterior regions The edge deforms through the notch. Therefore, the center of the widthwise direction of the rear side domain is not easy to be continuously attached to the body, and a gap is generated between the groin and the absorbent article, and there is a concern that leakage may occur.

In addition, in the absorbent article of Patent Document 1, a plurality of notches are formed in the rear region, and no absorbent material is disposed in the portion where the notches are disposed. Therefore, there is a concern that the leakage of body fluids may occur in the posterior domain through the notch.

The present invention was developed in view of the above-mentioned problems, and aims to improve the fit to the wearer's buttocks and suppress the leakage of excrement.

In order to solve the above-mentioned problems, the absorbent article (absorbent article 1) of the present disclosure has: the front-rear direction (front-rear direction L) and the widthwise direction (widthwise direction W) orthogonal to each other; and the excretion of the wearer The central domain facing the mouth (central domain S1); the posterior domain (posterior domain S3) facing the wearer’s hips; the middle domain (middle domain S4) arranged between the aforementioned central domain and the aforementioned posterior domain ); and an absorbent article arranged in the absorbent core (absorbent core 31) of the central domain, the rear domain and the intermediate domain, the gist of which is that the absorbent core has: from both outer edges of the absorbent core toward the width A pair of first low basis weight regions (first low basis weight regions 41) each extending inward in the side direction, and a second low side region extending in the front-rear direction along the center line connecting the center of the wide side in the rear side region The basis weight region (the second low basis weight region 42), the basis weight of the first low basis weight region and the basis weight of the second low basis weight region are higher than those of the outer edge of the absorbent core in the back region Lower basis weight, the first low basis weight area of the aforementioned pair The domains are divided in the widthwise direction, and are arranged only in the middle domain among the central domain, the rear domain, and the middle domain.

1. 1A‧‧‧Absorbent articles

3‧‧‧wing piece

4‧‧‧Hip Wings

10‧‧‧Skin face sheet

20‧‧‧Non-skin facial flakes

31‧‧‧Absorbent core

33‧‧‧Middle and high school

41‧‧‧The first low basis weight area

42‧‧‧The second low basis weight area

61‧‧‧The first body adhesion area

62‧‧‧Second body adhesion area

81‧‧‧1st side press section

82‧‧‧Second side press section

L‧‧‧Fore and aft direction

W‧‧‧Wide side direction

T‧‧‧Thickness direction

S1‧‧‧Central Domain

S2‧‧‧Front domain

S3‧‧‧Back domain

S4‧‧‧Intermediate domain

CL‧‧‧Centerline

FL, F1, F2, F3‧‧‧Broken line

Fig. 1 is a plan view of an absorbent article in one embodiment.

[Fig. 2] is a plan view of the absorbent article viewed from the opposite side of Fig. 1. [Fig.

[Fig. 3] is a cross-sectional view of the absorbent article along the line A-A in Fig. 1. [Fig.

[Fig. 4] is a cross-sectional view of the absorbent article along the line B-B in Fig. 1. [Fig.

[Fig. 5] is a cross-sectional view of a state where the absorbent article shown in Fig. 1 is installed by a wearer.

[Fig. 6] is a cross-sectional view of a state where the absorbent article shown in Fig. 1 is installed by a wearer.

[Fig. 7] Fig. 7 is a diagram for explaining the operation of the absorbent article shown in Fig. 1 in a state where the absorbent article is installed by a wearer.

[Fig. 8] is a plan view of an absorbent article of a modified example.

[Forms for implementing the invention]

According to the description in this manual and attached drawings, at least the following items can be understood.

An absorbent article having: the front and rear directions and the widthwise direction orthogonal to each other; the central area opposite to the excretion opening of the wearer; the back side area opposite to the hip of the wearer; located in the aforementioned central area And an intermediate domain between the back domain and the aforementioned back domain; and an absorbent article having an absorbent core arranged in the aforementioned central domain, the aforementioned back domain, and the aforementioned middle domain, characterized in that the aforementioned absorbent core has: two parts from the aforementioned absorbent core A pair of first low basis weight regions each extending inward in the widthwise direction from the outer edges, and a second low basis weight region extending in the front-rear direction along the center line connecting the center of the widthwise direction in the rear side domain, The basis weight of the first low basis weight region and the basis weight of the second low basis weight region are lower than the basis weight of the outer edge of the absorbent core in the back domain, and the first low basis weight of the pair The areas are divided in the widthwise direction, and are arranged only in the intermediate area among the central area, the rear area, and the intermediate area.

According to such an absorbent article, the first low basis weight region suppresses the influence of the deformation of the absorbent core in the central region on the deformation of the absorbent core in the rear region, so that the absorbent article is positioned between the central region and the rear region. Easy to deform independently. Therefore, the central region of the absorbent article is arranged along the shape of the wearer's crotch, and the rear region of the absorbent article can be arranged along the shape of the wearer's buttocks. Therefore, it is easy to maintain the state where the central domain and the rear domain are respectively attached to the body, and the feeling of attachment can be improved.

In this way, if the wearer walks while the absorbent article is attached to the body, a force in the twisting direction is applied to the central region sandwiched by the two legs. At this time, the pair of first low basis weight regions are each deformed, and the deformation caused by the force in the twist direction is absorbed in the first low basis weight region, so that the deformation of the rear region can be reduced. Therefore, even when the central area moves significantly due to the movement of the legs, the posterior area moves less than the central area, and continues to follow the buttocks for the buttocks.

In addition, the pair of first low basis weight regions are spaced apart in the widthwise direction, and the center region and the back side region can be deformed in the left and right directions with the absorbent core between the pair of first low basis weight regions as the center. Therefore, following the body of the wearer while walking, the absorbent article can be twisted and deformed, maintaining the fit of the crotch and buttocks, and suppressing leakage. In addition, since the central zone and the back zone are maintained in a state in which they fit the body during walking, the wearer can obtain a so-called sense of peace of mind that the absorbent article often continues to follow the body.

In such an absorbent article, the non-skin surface sheet located on the non-skin surface side of the absorbent core is provided with an adhesion area for holding the absorbent article into underwear, the first low basis weight area and the first 2 It is desirable that the low basis weight region is arranged in a region not overlapping the aforementioned adhesion region in the thickness direction.

According to such an absorbent article, it is possible to prevent the underwear from excessively hindering the deformation of the first low basis weight region and the deformation of the second low basis weight region. The force applied to the central area by the first low basis weight area can be prevented from being transmitted to the rear area, and the second low basis weight area can be used as the base point to deform the absorbent article into a convex shape to maintain the adhesion to the buttocks sex.

In such an absorbent article, in which, In the central zone, a pair of first side presses are provided on both sides of the center line, and in the rear zone, a pair of first press parts are provided on both sides of the second low basis weight region. For the two-side press section, it is desirable that no press section is provided in the aforementioned intermediate zone.

According to such an absorbent article, because there is no squeezing part in the middle zone, the first side squeezing part and the second side squeezing part are separated in the front-to-rear direction. Therefore, the deformation of the absorbent core in the central zone can be more effectively suppressed. The influence caused by the deformation of the absorbent core in the side area. In addition, on both sides of the second low basis weight region, a pair of second side press portions extending in the front-rear direction are provided. Since the second side press portion has relatively high rigidity, it becomes the deformation base point of the absorbent core. The second low basis weight region sandwiched between the pair of second side presses is more likely to bulge toward the wearer's body. Thereby, it is more compliant with the body of the wearer, and a comfortable fit feeling can be given to the wearer. The side portions of the absorbent core in the central region have higher rigidity due to the first side squeezing portion, and relative to the side portions of the absorbent core, the center in the widthwise direction is easily deformed into a convex shape toward the excretion opening of the wearer.

In addition, since the middle zone has no squeezing part, the rigidity is relatively low. Therefore, when the absorbent article is applied with force in the twisting direction, the pair of first low basis weight regions are easily deformed. Therefore, the absorbent article can be twisted and deformed by following the movement of the legs. Therefore, the first low basis weight region absorbs the deformation of the front region, so that the rear region can continue to follow the buttocks, and leakage can be suppressed.

In such an absorbent article, in which, The length of the first low basis weight region in the front-rear direction at the position of the outer edge of the first low basis weight region is preferably 10 mm or more and 50 mm or less.

According to such an absorbent article, since the length in the front-rear direction of the outer edge of the first low basis weight region is 10 mm or more, it is possible to effectively separate the deformation of the central region and the deformation of the rear region. In addition, since the length in the front-rear direction of the outer edge of the first low basis weight area is less than 50mm, the deformation of the body can be absorbed by the first low basis weight area, and flow to the buttocks side by the back side area. Body fluids. The user does not easily feel the anxiety of menstrual blood flowing to the buttocks side, and can obtain a sense of peace of mind at the time of installation.

In such an absorbent article, the rear region has hip wings that extend outward in the widthwise direction than the outer edge of the absorbent core of the central region.

According to such an absorbent article, not only the side portions of the absorbent core but also the hip wings are pushed down during installation. Therefore, the absorbent core of the back domain is more likely to swell up with the second low basis weight area as the apex. Therefore, arranging the absorbent core along the wearer's buttocks makes it easier to obtain the effect of suppressing leakage in the buttocks.

In such an absorbent article, the length of the outer edge of the first low basis weight region in the front-rear direction is longer than the length of the inner edge of the first low basis weight region in the front-rear direction. The length of the heavy region in the front-rear direction is preferably longer toward the outside in the aforementioned wide side direction.

According to such an absorbent article, the length of the outer edge of the first low basis weight area in the front-rear direction is longer than that of the inner edge of the first low basis weight area. The length of the front and back direction of the absorbent core is longer, so when the absorbent core receives a torsion force, the movable range of the absorbent core becomes wider, and the absorbent core can further follow the deformation of the body. In addition, the first low basis weight region is formed in a pair on the left and right, and the shape of the first low basis weight region is a tapered shape that tapers inward in the widthwise direction. Therefore, the imaginary line extending the outer edge extending inward in the widthwise direction in the first low basis weight regions on the left and right has a substantially X-shape. The absorbent core is easy to move in the rotation direction with the center in the widthwise direction as the fulcrum, and it is easy to follow the movement of the legs back and forth.

In such an absorbent article, it is desirable that the second low basis weight region intersects with an imaginary line connecting the rear end edges of the first low basis weight region.

According to such an absorbent article, since the second low basis weight region crosses the imaginary line connecting the first low basis weight region, it is easy to propagate the deformation of the absorbent core to the second low basis weight region based on the first low basis weight region. Basis weight area. In addition, with the second low basis weight area as the apex, the convexly deformed portion is located between the pair of first low basis weight areas, and receives the force from the wearer's leg via the first low basis weight area. Therefore, when the rear side of the second low basis weight area receives a force from the outside in the width direction to the inside in the width direction through the first low basis weight area, the second low basis weight on the imaginary line connecting the first low basis weight area The area is the fulcrum moving left and right. Compared with the structure in which the second low basis weight region can move freely in the widthwise direction, the movement of the front side of the second low basis weight region can be restricted, the distortion of the absorbent core can be suppressed, and the leakage of body fluids can be suppressed.

In such an absorbent article, there is a fold line for folding the aforementioned absorbent article, It is desirable that the first low basis weight region is arranged in a region where there is no fold line.

According to such an absorbent article, because the first low basis weight area is arranged in an area without a fold line, no folding habit is formed in the first low basis weight area, and the absorbent core can be made based on the first low basis weight area. Deformed.

In such an absorbent article, the rear end edge of the second low basis weight region may be positioned in front of the rear end edge of the absorbent core.

According to such an absorbent article, the absorbent core is arranged behind the second low basis weight region, and since the second low basis weight region is not formed, it does not bulge toward the wearer's side. It becomes the periphery of the sacrum behind the groin of the body, and it has a relatively flat shape. The part that abuts the periphery of the sacrum becomes a flat shape, and the rear end edge of the absorbent core fits the body of the wearer.

In such an absorbent article, the rear end edge of the second low basis weight region may be located at the rear end edge of the absorbent core.

According to such an absorbent article, the absorbent core of the rear side domain is divided on the left and right by the second low basis weight region, and each unilateral absorbent core sandwiching the second low basis weight region is moved by alternate movements of the legs. Therefore, allowing the one side absorbent core sandwiching the second low basis weight region to track the movement of the body, so that the other side absorbent core can be continuously attached to the body.

===About the absorbent article of this embodiment ===

Hereinafter, referring to the drawings, the absorbent article of the embodiment will be explained. bright. The absorbent article may be any absorbent article such as a sanitary pad (exudate sheet), a sanitary napkin, and an incontinence pad. In the following embodiment, a disposable sanitary napkin is described as an example of an absorbent article.

In addition, in the description of the following drawings, the same or similar parts are indicated by the same or similar symbols. However, the drawing is for illustration, and you must pay attention to the difference between the ratio of each size and the actual one. Therefore, the specific dimensions must be judged with reference to the following description. In addition, even between the drawings, there may be parts with different dimensional relationships and ratios.

(1) The overall structure of the absorbent article

Fig. 1 is a plan view of an absorbent article in one embodiment. Fig. 2 is a plan view of the absorbent article viewed from the opposite side of Fig. 1. Fig. 3 is a cross-sectional view of the absorbent article along the line A-A of Fig. 1. Fig. 4 is a cross-sectional view of the absorbent article along the line B-B in Fig. 1.

The absorbent article 1 has the front-rear direction L, the width direction W, and the thickness direction T. The front-rear direction L is a direction extending from the front side (ventral side) of the wearer to the rear side (back side), or a direction extending from the rear side of the wearer to the front side. The widthwise direction W is a direction orthogonal to the front-rear direction L. The thickness direction T is a direction extending from the skin surface side T1 of the wearer to the non-skin surface side T2, and is a direction orthogonal to the front-rear direction L and the widthwise direction W. The skin side T1 is equivalent to the side facing the wearer's skin when in use. The non-skin surface side T2 corresponds to the side opposite to the skin surface side T1 when in use, that is, corresponds to the side opposite to the skin of the wearer.

The absorbent article 1 has a central domain S1, a front domain S2, a rear domain S3, and a middle domain S4. The central domain S1 is an area including the center of the front-rear direction of the area facing the excretion opening (for example, vaginal opening) of the wearer. The central domain S1 is located at the lower part of the crotch of the underwear when the absorbent article is installed on the underwear. That is, the central domain is placed under the wearer's crotch, that is, the area between the wearer's legs.

The front domain S2 is located on the front side than the central domain S1. The front end edge of the front side domain S2 is the front end edge of the prescribed absorbent article 1. The back side domain S3 is more rearward than the middle domain S4. The rear edge of the rear domain S3 is the rear edge of the prescribed absorbent article 1. The length of the back-side domain S3 in the front-rear direction L may be longer than the length of the central domain S1 in the front-rear direction L.

The middle domain S4 is rearward than the middle domain S1 and forwardly than the rear domain S3. The middle domain S4 is a region including the rear end edge of the fin 3 described later. The front end edge of the middle domain S4 is the front end edge of the first low basis weight area 41 described later, and the rear end edge of the middle domain S4 is the rear end edge of the first low basis weight area 41.

A fin 3 may be provided in the central area S1. In addition, hip wings 4 that bulge outward in the widthwise direction W may be provided in the back domain S3. The hip wings 4 can extend outward in the widthwise direction than the outer edge of the absorbent core of the central domain S1. The front end edge of the fin 3 is defined by the root of the fin 3 and corresponds to the part on the front side among the two parts recessed most toward the inside of the widthwise direction W. As shown in FIG. The front end edge of the fin 3 may also define the boundary between the central zone S1 and the front zone S2. The rear edge of the fin 3 is regulated by the root of the fin 3 It corresponds to the portion on the rear side of the two portions recessed most inward in the widthwise direction W.

The absorbent article 1 has a skin surface sheet 10, a non-skin surface sheet 20, and an absorber 30. The skin surface sheet 10 is provided on the skin surface side T1 more than the absorber 30. The non-skin surface sheet 20 is provided on the non-skin surface side T2 more than the absorber 30. The absorber 30 is provided between the skin surface sheet 10 and the non-skin surface sheet 20.

The skin sheet 10 may have a surface sheet 11 and a side sheet 12. The surface sheet 11 is a liquid-permeable sheet that permeates liquids such as body fluids. The surface sheet 11 covers the central part of the absorber 30 in the widthwise direction W. As shown in FIG. The surface sheet 11 may extend in the front-rear direction L from the front domain S2 to the rear domain S3.

The side sheet 12 covers the outer edge of the surface sheet 11 in the widthwise direction W, and extends outward in the widthwise direction W than the surface sheet 11. The side sheet 12 may be composed of the same material as the surface sheet 11. The side sheet 12 may be arranged on the outer edge of the absorber 30 in the widthwise direction W, the flap 3 and the hip flap 4. The non-skin surface sheet 20 is a liquid-impermeable sheet.

The inner edge of the side sheet 12 is folded along the front-rear direction L toward the outside in the widthwise direction W. In addition, in this specification, the state along the front-rear direction refers to the state including the state parallel to the front-rear direction, and the state along the broadside direction refers to the state including the state parallel to the broadside direction. The stretchable member 91 which expands and contracts in the front-rear direction L is arrange|positioned between this folded side sheet 12. Inner edge and stretchable member of side sheet 12 91, is the leakage-proof side that constitutes the standing property. The standing point of the leak-proof side is the rear end edge of the stretchable member 91, the front end edge of the stretchable member 91, and a region located outside the stretchable member in the side sheet in the widthwise direction.

The absorber 30 is arranged at least in the central domain S1, the middle domain S4, and the rear domain S3. The absorbent body 30 has: an absorbent core 31 containing an absorbent material that absorbs liquid; and a core covering layer 32 that wraps the absorbent core 31. The core layer 32 only needs to cover the absorbent core 31 at least on the skin surface side than the absorbent core 31. The absorbent material constituting the absorbent core 31 may be formed of, for example, hydrophilic fiber, pulp, and super absorbent polymer (SAP). The core cladding layer may be composed of, for example, a non-woven fabric or a thin paper sheet.

The wings 3 and the hip wings 4 extend outward in the widthwise direction W from the outer edge of the absorbent core 31 in the central domain S1. The wings 3 and the hip wings 4 can be formed by layering side sheets 12 and non-skin surface sheets 20. The flap 3 is configured to be folded toward the non-skin surface sheet 20 side. The flap 3 is folded to the non-skin surface side of the crotch part of the underwear during use. The hip wing 4 is located on the back side of the wing piece 3, and is located in the back area S3. The hip wings 4 are not folded during use and are arranged between the underwear and the wearer's buttocks.

The measurement of the "thickness of the absorbent core" in this manual is performed by the following measurement method.

When enclosing the absorbent article 1 in a package, etc., use a sample taken out of the package and placed in an environment of 20°C±2°C and a relative humidity of 60%±5%RH for 12 hours in this state.

The measurement position is the central part of the absorbent core in the width direction of the product. At the time of measurement, the absorbent article is not in a contracted state, but is measured in a state where the stretchable member of the absorbent article is stretched. In addition, parts other than the absorbent core such as the skin sheet and non-skin sheet other than the absorbent core are removed. A dial indicator gauge PEACOCK manufactured by Ozaki Manufacturing Co., Ltd. was used, a gauge head with a diameter of 10 mm was used, and a test piece with a size of 30 mm×30 mm was prepared, and the thickness of the test piece was measured. The measuring device adjusts the measuring pressure relative to the test piece to 3 g/cm ² . Here, for 10 samples, the above-mentioned measurement is performed under various conditions, and the average value is used as the length.

In addition, the measurement of the "basis weight and density of the absorbent core" in this specification is performed by the following measurement method.

When enclosing the absorbent article 1 in a package, etc., use a sample taken out of the package and placed in an environment of 20°C±2°C and a relative humidity of 60%±5%RH for 12 hours in this state.

The absorbent article packed in the packaging body is unsealed, the folded absorbent article is unfolded, and the thickness and area of the part of the basis weight and density are measured. Next, the part for measuring the basis weight and density is cut out from the absorbent article, and the weight of the cut part is measured.

Next, parts other than the absorbent core, such as a skin sheet and a non-skin sheet, are removed from the cut-out part, and the weight of the absorber is measured. The basis weight is calculated from the weight of the absorbent body and the area of the part where the basis weight and density are measured. Calculate the density based on the basis weight and thickness.

In addition, the measurement of "length" in this manual is performed by the following measurement method.

When the absorbent article 1 is enclosed in a package, etc., use it and take it out of the package. In this state, it should be at 20℃±2℃, relative humidity 60%± Samples placed 12 hours in an environment of 5% RH. Next, using a spring gauge (belt: polyvinyl chloride coated with glass fiber) manufactured by Affinity Measurement Co., Ltd., the length of the measurement target part in this state was measured along the measurement target part. Here, for 10 samples, the above-mentioned measurement is performed under various conditions, and the average value is used as the length.

(2) The detailed structure of the absorber

Next, the structure of the absorber 30 will be described in more detail. The absorbent core 31 has a middle-high part 33 at least in the central domain S1. The middle-high part 33 may also extend from the central domain S1 toward the front domain S2. The middle-high part 33 is arranged across the center line CL in the central domain S1. The center line is a line connecting the centers of the widthwise direction of the absorbent article, and is parallel to the front-rear direction. The mid-high portion 33 refers to an area thicker than the thickness of the outer edge of the absorbent core. The basis weight of the absorbent material of the mid-high portion 33 may be higher than the basis weight of the absorbent core 31 in the region other than the mid-high portion 33 in the central domain S1, and may be higher than that of the pair of first low basis weight regions 41 in the middle domain S4. The area in between has a higher basis weight. It is desirable that the thickness of the absorbent core between the first low basis weight regions 41 and the thickness of the absorbent core 31 on the rear side than the first low basis weight regions 41 are thinner than the thickness of the mid-high portion 33. More desirably, the thickness of the absorbent core 31 of the entire rear side domain S3 is thinner than the thickness of the mid-high portion 33. Because the middle-high portion 33 has a relatively thick thickness, it is easy to fit on the excretory opening of the wearer. On the other hand, since the thickness of the absorbent core of the back domain S3 is relatively thin, and the rigidity of the back domain S3 is relatively low, it is easy to follow the movement of the wearer's legs, and the sense of discomfort when moving the legs can be reduced. In addition, if the basis weight of the absorbent core is relatively high, the absorbent core tends to be twisted. By, The basis weight of the absorbent core between the first low basis weight region 41 and the basis weight of the absorbent core 31 behind the first low basis weight region 41 are low, so that the absorbent core on the buttocks side of the wearer is not easily twisted . The rear end edge of the middle-high portion 33 is the front end edge of the first low basis weight region 41. The front end edge of the middle-high portion 33 is adjacent to a first side press portion 81 described later. The middle-high part 33 is surrounded by the first side press part 81.

The absorber 30 has a first low basis weight region 41 and a second low basis weight region 42. Here, the "low basis weight area" refers to the area formed by the absorbent core 31 having a lower basis weight than the surrounding absorbent core 31, or the area without the absorbent core 31. In this way, the "low basis weight area" is a concept including the area where the basis weight of the absorbent core 31 is zero. In the sleeping position of the wearer, the back domain of the absorbent article is arranged directly under the wearer's buttocks, that is, between the buttocks and the bed. Since the second low basis weight region formed in the rear domain has relatively low rigidity, it causes less sense of disobedience to the wearer. In addition, the absorbent core constituting the absorbent core by the first low basis weight region and the second low basis weight region is not easy to move between the central region, the right part of the back domain, and the left part of the back domain. Thereby, it is possible to suppress the local concentration of the absorbent material constituting the absorbent core according to the operation during installation. As a result, the wearer's sense of disobedience can be alleviated in the loading of the absorbent article. Therefore, the pretender is less likely to feel a sense of contradiction, especially in the sleeping posture.

The basis weight of the absorbent core 31 in the low basis weight regions 41 to 42 is preferably 60% or less of the basis weight of the absorbent core around the low basis weight regions 41 to 42 (except for the middle and high parts), and more preferably 50% or less . The basis weight of the first low basis weight region 41 and the basis weight of the second low basis weight region of this embodiment The weight is lower than the basis weight of the outer edge of the absorbent core in the back domain S3.

Even if the absorbent core 31 does not have the area of the "low basis weight area", the core cladding layer covers the entire absorbent core 31 across the low basis weight area. At this time, even if the absorbent core 31 is divided into a plurality of regions, the absorbent body 30 can be integrated by the core cladding layer.

The first low basis weight region 41 and the second low basis weight region 42 serve as boundaries where the rigidity of the absorber 30 changes. Therefore, the first low basis weight region 41 and the second low basis weight region 42 correspond to regions where the absorber 30 is easily deformed.

The first low basis weight region 41 is provided in the middle region S4. The pair of first low basis weight regions 41 each extend from both outer edges of the absorbent core toward the inner side in the widthwise direction. The first low basis weight region suppresses the influence of the deformation of the absorbent body in the central region on the deformation of the absorbent body in the rear region, so that the absorbent article is easily deformed independently in the central region and the rear region. Therefore, the central region of the absorbent article is arranged along the shape of the wearer's crotch, and the rear region of the absorbent article can be arranged along the shape of the wearer's buttocks. The first low basis weight region 41 is provided on the rear side than the center 3LC of the flap 3 in the front-rear direction L, and on the front side than the rear edge of the absorber 30. The first low basis weight region 41 is provided across the rear end edge of the wing portion 3 in the front-rear direction L. Since the rear end edge of the wing that spans the base end of the wing in the front-rear direction is provided with the first low basis weight region 41, the first low basis weight region is divided and applied to the wing from the wearer’s leg The force can restrain the force from propagating to the back domain. Since the first low basis weight region 41 is arranged across the rear end edge of the wing portion that becomes the base end of the wing portion in the front-rear direction, the first low basis weight region 41 is divided from the wearer’s leg. The force applied to the fins can restrain the force from propagating to the rear domain S3. In this way, if the wearer walks while the absorbent article is attached to the body, a force in the twisting direction is applied to the central region sandwiched by the two legs. At this time, the pair of first low basis weight regions are each deformed, and the deformation caused by the force in the twist direction is absorbed in the first low basis weight region, so that the deformation of the rear region can be reduced. Therefore, even when the central area moves significantly due to the movement of the legs, the posterior area moves less than the central area, and continues to follow the buttocks for the buttocks.

The pair of first low basis weight regions 41 are separated in the widthwise direction. Thereby, with the absorbent core between the pair of first low basis weight regions as the center, each of the central region and the rear region can be deformed left and right. Therefore, following the body of the wearer while walking, the absorbent article can be twisted and deformed, maintaining the fit to the crotch and buttocks, and suppressing leakage. In addition, since the central zone and the back zone are maintained in a state in which they fit the body during walking, the wearer can obtain a so-called sense of peace of mind that the absorbent article often continues to follow the body. An absorbent core is arranged between the pair of first low basis weight regions 41. The absorbent core between the pair of low basis weight regions is deformed into a convex shape with the first low basis weight region 41 as a base point when clamped by the legs of the wearer, and fits the body of the wearer. In addition, since the absorbent core is arranged between the pair of first low basis weight regions 41, body fluids can be guided from the central region S1 to the rear region S3.

In this embodiment, the pair of first low basis weight regions 41 are separated in the widthwise direction, and the central region S1 and the rear side region S3 are not completely divided. Since the absorbent core is arranged between the pair of first low basis weight regions 41, the deviation of the relative positions of the central domain S1 and the rear domain S3 can be reduced. Therefore, from getting up at night to walking to the toilet, etc., the central domain S1 and the rear side domain S3 are not easily offset, which can suppress the formation of a step in the thickness direction, and make it difficult to produce a sense of violation. Furthermore, the positions of the central domain S1 and the back domain S3 are not easily shifted, and it is easy to arrange the central domain S1 and the back domain S3 at a position suitable for the body.

The pair of first low basis weight regions 41 are arranged only in the middle domain S4 among the middle domain S1, the rear domain S3, and the middle domain S4. That is, the first low basis weight region 41 is not provided in the central area S1 and the rear area S3. The first low basis weight region 41 is also not provided in the front side domain S2. In more detail, the first low basis weight region passes through the center 3LC of the fin in the front-rear direction, and is not arranged on a straight line extending in the widthwise direction, but is located behind the center 3LC. The central area S1 is clamped by the wearer's legs, and a force toward the inside of the widthwise direction is applied. In particular, this force is applied to the center 3LC of the wing portion in the front-rear direction, and the absorbent core is swelled by the force toward the inner side of the width direction to fit the body of the wearer. By shifting the first low basis weight region 41 with respect to the center 3LC in the front-rear direction of the fin, a force toward the inside of the widthwise direction is applied to the center 3LC in the front-rear direction of the fin without hindering the attachment of the central area S1. Fit.

The pair of first low basis weight regions 41 are not provided in the central domain S1 and the rear domain S3. Since the low basis weight area is not formed in the central domain S1, the side leakage in the central domain S1 can be effectively suppressed. In addition, the rigidity of the absorbent core in the central region can be maintained, and excessive deformation of the absorbent core in the central region can be suppressed when the absorbent core is sandwiched between the wearer's legs, and unintended deformation of the absorbent core in the central region can be suppressed. In addition, the wearer can get the so-called peace of mind that body fluids can be absorbed by the central domain S1, and will not feel uneasy about leakage. Use absorbent articles.

In addition, since the first low basis weight region 41 is not formed in the back domain S3, the outer edge of the absorbent core 31 of the back domain S3 is not easily deformed and is easily maintained as a deformation base point. Therefore, the center of the widthwise direction of the absorbent core 31 in the rear side domain S3 is easily deformed into a convex shape with the side portion of the absorbent core as a base point, and the absorbent core is easily adhered to the crotch groove continuously, and the occurrence of leakage can be suppressed. In addition, since the first low basis weight region 41 is not provided in the anterior domain S2, the force of the anterior domain S2 attached to the vaginal opening will not run away, and the anterior domain S2 can be attached to the vaginal opening to prevent side leakage.

The length of the outer edge of the first low basis weight region 41 in the front-rear direction is longer than the length of the inner side edge of the first low basis weight region 41 in the front-rear direction. The length of the first low basis weight region 41 in the front-rear direction becomes longer toward the outside in the widthwise direction. Thereby, when the absorbent core receives a torsion force, the movable range of the absorbent core is widened, and the absorbent core can further follow the deformation of the body. In addition, the first low basis weight region is formed in a pair on the left and right, and the shape of the first low basis weight region is a tapered shape that tapers inward in the widthwise direction. Therefore, the imaginary line extending the outer edge extending inward in the widthwise direction in the first low basis weight regions on the left and right has a substantially X-shape. The absorbent core is easy to move in the rotation direction with the center in the widthwise direction as the fulcrum, and it is easy to follow the movement of the legs back and forth.

The first low basis weight region 41 is three regions divided into 3 equal parts in the front-rear direction of the absorbent article, and can be provided in a central region. Since the first low basis weight area 41 is not provided in the anterior region among the three regions, the force of the anterior region S2 on the vaginal opening will not run away, and the anterior region Domain S2 fits on the vaginal opening to prevent side leakage. In addition, since the first low basis weight region 41 is not provided in the rear region among the three regions, the outer edge of the absorbent core 31 of the rear region S3 is not easily deformed and is easily maintained as a deformation base point. Therefore, the center of the widthwise direction of the absorbent core 31 in the rear side domain S3 is easily deformed into a convex shape with the side portion of the absorbent core as a base point, and the absorbent core is easily adhered to the crotch groove continuously, and the occurrence of leakage can be suppressed. The first low basis weight region 41 is a range provided on the rear end edges of the straddling wings 3 and the hip wings 4 in the front-rear direction. The central area S1 is fixed to the underpants via the wings 3, and the back side area S3 is fixed to the underpants via the hip wings 4. Since the first low basis weight region 41 is provided in the area spanning the wing piece 3 and the hip wing 4, it has a function of buffering both the movement of the central domain S1 and the movement of the rear domain S3.

The length of the first low basis weight region 41 in the front-rear direction at the position of the outer edge of the first low basis weight region 41 is desirably 10 mm or more and 50 mm or less, and more desirably 10 mm or more and 30 mm or less. Since the length of the first low basis weight region in the front-rear direction is 10 mm or more, the deformation of the central region and the deformation of the rear region can be effectively separated. In addition, since the length of the first low basis weight region in the front-rear direction is 50 mm or less, the first low basis weight region can absorb body deformation while absorbing body fluids flowing to the buttocks side by the back side region. The wearer is not easy to feel the anxiety of menstrual blood flowing to the buttocks side, and can get a sense of peace of mind during installation.

The stretchable member 91 constituting the leak-proof side is arranged across the first low basis weight region 41 in the front-rear direction L. The area where the stretchable member 91 expands and contracts in the front-rear direction overlaps the first low basis weight area 41, and the shrinkage by the stretchable member 91 tends to be effective. Also, absorbent articles 1 Following the movement of the leg, when it is twisted and fitted to the body, the first low basis weight region 41 is compressed or stretched. The stretchable member 91 is easily contracted when the first low basis weight region 41 is compressed, and easily stretched when the first low basis weight region 41 is extended. Even when the absorbent article 1 is twisted, the standing leak-proof frills can easily follow the body and can maintain good fit. In addition, due to the contraction of the stretchable member 91, the central domain S1 and the rear domain S3 on both sides of the front and rear direction sandwiching the first low basis weight region 41 can be brought close to each other. Therefore, even when wrinkles are generated in the intermediate zone S4 due to the deformation of the first low basis weight region 41, the wrinkles can be gathered.

The second low basis weight region 42 extends in the front-rear direction L along the center line CL of the absorbent article in the back domain S3. The second low basis weight region 42 may extend linearly in the front-rear direction L. Since the second low basis weight area is formed in the back domain, the center of the back domain in the width direction tends to face the wearer's The body is prominent. Thereby, the absorbent article can be deformed in accordance with the shape of the crotch of the wearer in the sleeping posture in the rear region. As a result, the wearer can obtain a comfortable fit with the absorbent article on the buttocks.

In addition, the second low basis weight region 42 crosses a virtual line connecting the pair of first low basis weight regions 41. The imaginary line may be a line connecting any part of the first low basis weight regions, and specifically, a line connecting the rear end edges of the first low basis weight regions. The second low basis weight region 42 extends forward from the imaginary line connecting the rear end edges of the left and right first low basis weight regions 41. Taking the first low basis weight area as the base point, it is easy to propagate the deformation of the absorbent core to the second low basis weight area. No. 1 low basis weight area The deformation base point extending in the widthwise direction due to the domain and the deformation base point extending in the front-rear direction due to the second low basis weight region are easily linked, and the position to reach the depth of the gullet is variable. In addition, the convex shape formed by the mid-high portion and the second low basis weight area along the front-rear direction of the body is pseudo-connected, and the area capable of absorbing body fluids is connected in the front-rear direction. Therefore, the body fluid adhering to the wearer's skin can be quickly absorbed, and the spread of the body fluid to the skin surface can be suppressed, and the leakage of the body fluid can be reduced. In addition, with the second low basis weight area as the apex, the convexly deformed portion is located between the pair of first low basis weight areas, and receives the force from the wearer's leg via the first low basis weight area. Therefore, when the rear side of the second low basis weight area receives a force from the outside in the width direction to the inside in the width direction through the first low basis weight area, the second low basis weight on the imaginary line connecting the first low basis weight area The area is the fulcrum moving left and right. Compared with the structure in which the second low basis weight region can move freely in the widthwise direction, the movement of the front side of the second low basis weight region can be restricted, the distortion of the absorbent core can be suppressed, and the leakage of body fluids can be suppressed.

The rear end edge of the second low basis weight region 42 is located on the front side than the rear end edge of the absorbent core, and is located on the rear side than the center of the rear side domain S3 in the front-rear direction. In the cross section along the front-rear direction L of the wearer's body, the groove between the buttocks (thigh groove) exists in an area that reaches the coccyx from behind the perineum, and the second low basis weight area is in contact with this area. On both sides of the second low basis weight region 42, the basis weight of the absorbent core is higher than that of the second low basis weight region 42, and regions with high cushioning properties are arranged. Both sides of the second low basis weight region 42 softly abut against the tailbone, and can prevent irritation to the wearer's skin. In addition, the absorbent core is arranged behind the second low basis weight region, and since the second low basis weight region is not formed, it does not swell toward the wearer's side. Than body The femoral groove of the body becomes the periphery of the sacrum and is relatively flat. The part that abuts the periphery of the sacrum becomes a flat shape, and the rear end edge of the absorbent core fits the body of the wearer.

In the area where the first low basis weight region 41 and the second low basis weight region 42 overlap, the constituent members constituting the absorbent article may not be joined to each other. Specifically, the surface sheet 11 and the absorber 30 may not be joined, and the non-skin surface sheet 20 and the absorber 30 may not be joined. By not joining the structural members, the first low basis weight region 41 and the second low basis weight region 42 can be deformed more flexibly, and the absorbent article can easily follow the deformation of the body.

(3) Press section

The absorbent article 1 has at least a squeezing part 80 formed by squeezing the absorbent core 31 in the thickness direction T. The area where the squeezed part is formed has a higher density than the area where the squeezed part is not formed. The squeezing part 80 has a higher density than the area where the squeezing part is not formed. The press section 80 has a first side press section 81 and a second side press section 82 (refer to FIG. 1). The press section 80 is provided in the central area S1, the front side area S2, and the rear side area S3, and is not provided in the middle area S4. Therefore, no press part is provided in the first low basis weight region 41. According to such an absorbent article, because there is no squeezing part in the middle zone, the first side squeezing part and the second side squeezing part are separated in the front-to-rear direction. Therefore, the deformation of the absorbent core in the central zone can be more effectively suppressed. The influence caused by the deformation of the absorbent core in the side area. In addition, on both sides of the second low basis weight region, a pair of second side press portions extending in the front-rear direction are provided. NS The two-side press section becomes the base point of deformation of the absorbent core due to its relatively high rigidity. The second low basis weight region sandwiched between the pair of second side presses is more likely to bulge toward the wearer's body. Thereby, it is more compliant with the body of the wearer, and a comfortable fit feeling can be given to the wearer. The side portion of the absorbent core in the central region increases rigidity due to the first side squeezing portion, and the center of the widthwise direction with respect to the side portion of the absorbent core is easily deformed into a convex shape toward the excretion opening of the wearer. In addition, since the middle zone has no squeezing part, the rigidity is relatively low. Therefore, when the absorbent article is applied with force in the twisting direction, the pair of first low basis weight regions are easily deformed. Therefore, the absorbent article can be twisted and deformed by following the movement of the legs. Therefore, the first low basis weight region 41 absorbs the deformation of the front region, so that the rear region can continue to follow the buttocks, and leakage can be suppressed.

The first side press 81 is provided at least in the central zone S1. The first side press portion 81 is formed by compressing the surface sheet 11 and the absorber 30 in the thickness direction T. The first side press section 81 is arranged on both sides with the center line CL and the mid-high section 33 interposed therebetween, and extends in the front-rear direction L. As shown in FIG. The first side squeezing part 81 is an outer edge of the predetermined middle-high part 33.

The first side squeeze portion 81 is bent in the widthwise direction W in the vicinity of the front end edge of the absorbent core 31, and is continuously connected in a U-shape. Instead of the above-mentioned structure, the first side press section 81 may be separately provided on both sides of the widthwise direction W of the mid-height section 33. That is, the pair of first side press parts 81 may be separately provided in the form of being separated from each other. Thereby, when a force is applied from the outside in the widthwise direction to the inside in the widthwise direction of the absorbent article, the force is easily transmitted to the middle-high part via the first side squeezing part 81, and the middle-high part can be easily attached to the vaginal opening.

The second side press section 82 sandwiches the second low base in the rear area S3 The heavy areas 42 are provided on both sides. The second side press portion 82 is separated from the second low basis weight region 42 and does not hinder the convex deformation caused by the second low basis weight region. The second side press portion 82 extends in the front-rear direction L. The first side press section 81 and the second side press section 82 are separated in the aforementioned front-rear direction. A first low basis weight region 41 is arranged between the first side press section 81 and the second side press section 82. Since the first side squeeze part and the second side squeeze part are separated in the front-rear direction, the influence of the deformation of the absorber in the central zone S1 on the deformation of the absorber in the rear zone can be more effectively suppressed. In addition, because the second side press section is provided on both sides with the second low basis weight area 42 therebetween, the second low basis weight area sandwiched between the pair of second side press sections is easier to install. The side of the person's body bulges. The absorbent core is more compliant with the wearer's body and can give the wearer a comfortable fit.

(4) Adhesion area

As shown in FIG. 2, the absorbent article 1 has: a first body adhesive area 61 as a first adhesive area of an adhesive used to lock the absorbent article 1 into underwear S, and a second body adhesive area as a second adhesive area Area 62, flap adhesion area 63 and hip adhesion area 64. These adhesion regions 61 to 64 are provided on the non-skin surface side of the non-skin surface sheet 20.

The first body adhesion area 61 is arranged in front of the second body adhesion area 62. The first body adhesion area 61 and the second body adhesion area 62 extend in the front-rear direction L. The first body adhesion area 61 is arranged to be separated from the second body adhesion area 62 in the front-rear direction L. The first body adhesion area 61 is located in front of the first low basis weight area 41 side. The second body adhesion area 62 is located on the rear side of the first low basis weight area 41. The flap adhesion area 63 is provided on the flap 3. The hip wing adhesion area 64 is provided on the hip wing 4. By separating the first adhesion area from the second adhesion area, it is easy to realize respective deformations and actions in the area ahead of the first low basis weight area and the area behind the first low basis weight area. It is easier for the central domain and the rear domain to deform into different shapes according to the shape of the wearer's body.

It is desirable that the first low basis weight region 41 is arranged in a region that does not overlap with the adhesion regions 61 to 64 in the thickness direction T. More specifically, the first low basis weight area 41 is provided in the area between the first body adhesion area 61 and the second body adhesion area 62. It is desirable that the second low basis weight region 42 is arranged in a region that does not overlap with the adhesion regions 61 to 64 in the thickness direction T. More specifically, the second low basis weight region 42 is provided between the plurality of second body adhesion regions 62. Thereby, the deformation of the first low basis weight region and the deformation of the second low basis weight region can be prevented from being excessively hindered by the underwear. With the first low basis weight area, it is possible to prevent the force applied to the central area from being transmitted to the rear area. In addition, the first low basis weight region 41 and the second low basis weight region 42 can further function as deformation base points. That is, the adjacent absorbent cores 31 sandwiching the first low basis weight region 41 and the second low basis weight region 42 easily operate independently of each other. Thereby, the absorber 30 fits the shape of the wearer's crotch and buttocks more easily. Therefore, it is possible to provide an absorbent article that conforms to the body of the wearer more and can give the wearer a more comfortable fit feeling.

It is desirable that the second side press portion 82 is provided in an area overlapping with the second body adhesion area 62. The area where the second side press 82 is located is stuck In panties. Thereby, when the absorbent core 31 is deformed with the second side press portion 82 as a base point, the second side press portion 82 can be supported by the underwear. Since the second side press portion 82 that is the base point of deformation is supported, it is easy to maintain a state where the area between the second side press portions 82 protrudes.

(5) Absorbent articles in use

Next, referring to FIGS. 5 to 7, the shape of the absorbent article in use will be described. Fig. 5 is a schematic cross-sectional view of the absorbent article in use along the line C-C in Fig. 1. Fig. 6 is a schematic cross-sectional view of the absorbent article in use along the line D-D of Fig. 1. Fig. 7 is a view of the absorbent article in a state where the underwear is attached from the skin facing surface side. In addition, Figs. 5 and 6 are two-dot chain lines showing the shape of the wearer's body.

When the absorbent article 1 is used as a sanitary napkin for sanitary use, the absorbent article 1 is fixed to the underwear S. The wearer pulls up the underwear fitted with the absorbent article to install the absorbent article. By pulling up the underwear, the central area S1 and the back area S3 of the absorbent article are pressed on the wearer's side via the underwear, and are closely attached to the wearer's body. In this state, if the wearer’s legs are sandwiched, the central region S1 of the absorbent article 1 is sandwiched by the wearer’s legs and bears from the outside of the widthwise direction W to the inside of the widthwise direction W. force.

The cross-sectional shape of the wearer's body along the widthwise direction W of the absorbent article 1 is different between the vicinity of the crotch and the vicinity of the buttocks. Specifically, the cross-sectional shape of the body near the vaginal cleft of the wearer's crotch (near the vaginal opening where menstrual blood comes out) is a depression of the labia majora from the side toward the absorbent article 1 Concave shape. In the crotch area of the wearer, the central area S1 of the absorbent article is arranged to face each other. Under the wearer's crotch, the absorbent core 31 of the central domain S1, especially the mid-high portion 33, is arranged along the body to suppress the leakage of body fluids under the crotch (refer to FIG. 5).

The perineum, which is behind the labia majora of the pretender, is more behind, where the anus and groin are located. The cross-sectional shape of the body near the rear side of the perineum is a shape with a recessed center in the widthwise direction. On the buttocks of the wearer, the back side domain S3 of the absorbent article is arranged to face each other.

A second low basis weight region 42 extending in the front-rear direction L along the center line CL is formed in the rear side domain S3. In addition, the absorbent core of the rear side domain S3 pushes down the side of the absorbent core by the right and left buttocks. At this time, because the hip wings are provided, not only the sides of the absorbent core but also the hip wings are pushed down. Therefore, the absorbent core of the back domain is more likely to swell up with the second low basis weight area as the apex. The center of the rear side domain S3 in the widthwise direction W easily protrudes toward the wearer's body by the force from the outside to the inside of the absorbent article (refer to FIG. 6). Thereby, the absorbent article 1 can be deformed in accordance with the shape of the wearer's crotch in the rear region S3. As a result, the wearer can obtain a comfortable fit with the absorbent article 1 even on the buttocks. In addition, the absorbent core is arranged behind the second low basis weight region, and since the second low basis weight region is not formed, it does not swell toward the wearer's side. It becomes the periphery of the sacrum behind the groin of the body, and it has a relatively flat shape. The part that abuts the periphery of the sacrum becomes a flat shape, and the rear end edge of the absorbent core fits the body of the wearer.

Herein, the absorbent article 1 changes into different shapes in the central domain S1 and the rear domain S3 to match the shape of the wearer's body. 1st Low Base The heavy region 41 suppresses the influence of the deformation of the absorber 30 in the central domain S1 on the deformation of the absorber 30 in the rear domain S3. That is, the absorbent article is easily deformed independently in the central area S1 and the rear area S3 by the first low basis weight area 41.

In addition, the absorbent article constructed in this way deforms in response to the movement of the wearer's legs in the installed state. Fig. 7 shows the modified form of the absorbent article when the wearer alternately moves the legs. Fig. 7(a) shows a state where the positions of the wearer's legs are aligned in the front-rear direction. From the state shown in Figure 7(a), if the wearer extends the left leg on the left side of Figure 7 to the front of the right leg, the central area S1 is pushed forward and the left leg becomes Figure 7(b) ) Shown in the state. Also, from the state shown in Figure 7(a), if the wearer extends the right leg on the right side of Figure 7 to the front of the left leg, the central area S1 will be pushed forward to the left by the right leg and become Figure 7 (c) The state shown.

As shown in Figures 5 and 6, when the absorbent article is attached to the body, if the wearer walks, the legs alternately move and force is applied to the product twisting direction. At this time, the notch on both sides absorbs the force of twisting, and the convex fitting shape can be maintained.

In more detail, when the wearer’s legs are not moving, as shown in Figure 5, the central domain S1 fits under the wearer’s crotch, and as shown in Figure 6, the rear side domain S3 fits on The user’s throat. In this state, if the wearer moves his leg, the central area S1 where the leg is clamped receives the force in the twisting direction in response to the front and back movement of the leg. Specifically, when a force is applied to the absorbent article from the wearer's legs, it is easy to be applied to the central area S1, particularly the center 3LC of the wings in the front-rear direction. The central domain S1 of the absorbent article, especially the front of the flap The center 3LC in the rear direction exerts a force along the broadside direction. At this time, the back side area is attached to the body, because the rigidity of the area between the pair of first low basis weight areas is relatively low, so the central area is centered on the area between the pair of first low basis weight areas Swing left and right. Therefore, the central area S1 is twisted left and right about the area between the pair of first low basis weight areas as the center. In addition, not only when walking, but also when the wearer turns over while asleep, the body also bends, and a force in the twisting direction is applied to the central area S1 and the rear area S3. Therefore, the absorbent article twists and deforms in response to the movement of the leg, and can follow the movement of the body.

At this time, since the first low basis weight region 41 has a lower basis weight and lower rigidity, it is compressed or stretched. The deformation of the first low basis weight region can suppress the deformation of the central region S1 from being transmitted to the rear region S3. For example, as shown in Figures 7(b) and (c), when the absorbent core between a pair of first low basis weight regions 41 is the center, the front end edge of the central domain S1 swings to the left and right, the left and right first low The basis weight area is deformed individually to absorb the deformation of the central area. Therefore, even when the front end edge of the central zone S1 swings greatly left and right, the rear zone can continue to follow the body. Similarly, with the first low basis weight region 41, it is possible to suppress the deformation of the back domain S3 from being transmitted to the central domain S1. Therefore, the central domain S1 and the rear domain S3 will not buffer each other, and can continue to follow the body separately.

(6) Modifications

Next, the absorbent article 1A of the modified example of FIG. 8 will be described. In addition, in the description of the modified example, the same reference numerals are used for the same structure as the above-mentioned embodiment, and the description is omitted. The first lowest in Modification 1 The basis weight area 41 is formed by cut marks. Even in the first low basis weight region formed by the cut, the effect of the action of separating the absorbent core of the central region and the rear region and the deformation of the absorbent article such as twisting can be achieved.

The rear edge of the second low basis weight region 42 is located at the rear edge of the absorbent core. Therefore, the area between the rear end edge of the absorbent core and the front end edge of the second low basis weight region in the front-rear direction is divided left and right by the second low basis weight region.

Since the rear edge of the second low basis weight region 42 is positioned at the rear edge of the absorbent core 31, the absorbent core is divided left and right, so that the absorbent core 31 of the rear domain S3 can easily follow the movement of the body on the left and right individually. For example, when the wearer walks, the left and right feet are moved alternately. With the movement of this foot, the buttocks also move alternately from side to side. If the absorbent core 31 of the back domain S3 moves in the width direction, the entire absorbent core 31 of the back domain S3 moves left and right due to the alternating movement of the feet, and the fit in the buttocks may be unstable. .

The absorbent core 31 of the back side domain S3 is divided left and right by the second low basis weight area 42, whereby the individual absorbent cores 31 sandwiching the second low basis weight area 42 move according to the alternate movement of the feet. . Therefore, by allowing the one side absorbent core 31 sandwiching the second low basis weight region 42 to follow the movement of the body, the other side absorbent core 31 can be continuously attached to the body.

Moreover, the absorbent article 1A of a modification has the fold line for folding the said absorbent article. The absorbent article of Modification 1 has front and rear fold lines FL along the front-rear direction, and wide-side fold lines F1 to F3 along the wide-side direction. The fold line is the fold line when the individual is packaged. The first low basis weight region 41 is arranged without front and rear fold lines FL and along the widthwise direction The wide-sided polyline F1~F3 area. Because the first low basis weight area 41 is arranged in an area without a fold line, no folding habit is formed in the first low basis weight area 41, and it can continue to function as a base point of deformation caused by the first low basis weight area 41 .

In addition, because there is no fold line in the first low basis weight region 41, no folding habit is formed in the first low basis weight region, and the absorbent core can be deformed with the first low basis weight region as a base point. In more detail, it is possible to prevent the rigidity of a part of the first low basis weight region from increasing due to the folding line. For example, if a fold line is provided in the first low basis weight region 41, the fibers in the portion where the fold line is provided become dense, and therefore, when a force is applied to the absorbent article, the force tends to concentrate on the dense portion. Therefore, the densified part becomes the base point of deformation, which may cause concerns about the distortion of the absorbent core. However, because no fold line is provided in the first low basis weight region 41, it is possible to suppress the unintentional provision of a deformation base point. By deforming the absorbent core with the first low basis weight region 41 as the base point, the effect of continuous adhesion to the crotch groove can be exerted, and the occurrence of leakage can be suppressed.

As mentioned above, although the present invention has been described in detail using the above-mentioned embodiments, it is obvious to the industry that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as a modified and changed aspect without departing from the meaning and scope of the present invention defined by the description of the scope of the patent application. Therefore, the description in this specification is for the purpose of exemplification and does not have any meaning to limit the present invention.

In addition, the entire contents of the Japanese Patent Application No. 2016-17139 filed on February 1, 2016 are incorporated into this specification by reference.

[Industrial availability]

It is possible to provide an absorbent article that improves the fit to the wearer's buttocks and suppresses the leakage of excrement.

1‧‧‧Absorbent articles

3‧‧‧wing piece

3LC‧‧‧The center of the front and rear direction

4‧‧‧Hip Wings

10‧‧‧Skin face sheet

11‧‧‧Surface flakes

12‧‧‧Side sheet

30‧‧‧Absorber

31‧‧‧Absorbent core

33‧‧‧Middle and high school

41‧‧‧The first low basis weight area

42‧‧‧The second low basis weight area

80‧‧‧Press section

81‧‧‧1st side press section

82‧‧‧Second side press section

91‧‧‧Flexible member

CL‧‧‧Centerline

W‧‧‧Wide side direction

S1‧‧‧Central Domain

S2‧‧‧Front domain

S3‧‧‧Back domain

S4‧‧‧Intermediate domain

Claims (10)

An absorbent article having: the front and rear directions and the widthwise direction orthogonal to each other; the central area opposite to the excretion opening of the wearer; the rear area opposite to the hip of the wearer; The front side domain that is further to the front side; the middle domain located between the aforementioned central domain and the aforementioned back domain; and the absorption of absorbent cores arranged in the aforementioned central domain, the aforementioned front domain, the aforementioned back domain, and the aforementioned middle domain A sexual article characterized in that the absorbent core has: a pair of first low basis weight regions each extending from both outer edges of the absorbent core toward the inner side in the widthwise direction, and a pair of first low basis weight regions extending along the widthwise side in the rear region The center line of the center of the direction extends toward the front and rear direction of the second low basis weight region. The basis weight of the first low basis weight region and the basis weight of the second low basis weight region are greater than those of the absorbent core in the back domain. The basis weight of the outer edge of the pair is lower, and the first low basis weight regions of the pair are separated in the widthwise direction, and are only arranged in the middle region of the center region, the rear region, and the middle region , And is not set in the aforementioned front domain. The absorbent article described in claim 1, wherein the non-skin surface sheet located on the non-skin surface side of the absorbent core is provided with an adhesive area for holding the absorbent article into underwear, and the first low The basis weight region and the second low basis weight region are arranged in the thickness direction in a region that does not overlap the adhesion region. For example, the absorbent article described in item 1 or item 2 of the scope of patent application, wherein, in the central region, a pair of first side press portions are provided on both sides with the center line sandwiched therebetween, and in the rear region, A pair of second side press sections are provided on both sides of the second low basis weight region sandwiching the second low basis weight region, and no press section is provided in the intermediate region. The absorbent article described in item 1 or item 2 of the scope of patent application, wherein the length of the front-rear direction of the first low basis weight region at the position of the outer edge of the first low basis weight region is 10 mm or more and 50 mm the following. The absorbent article described in claim 1 or 2, wherein the rear domain has hip wings that extend outward in the widthwise direction than the outer edge of the absorbent core in the central domain. The absorbent article described in item 1 or item 2 of the scope of the patent application, wherein the length in the front-rear direction of the outer edge of the first low basis weight region is greater than the length of the inner edge of the first low basis weight region. The length in the front-rear direction is longer, and the length in the front-rear direction of the first low basis weight region becomes longer toward the outside in the widthwise direction. The absorbent article described in claim 1 or 2, wherein the second low basis weight region crosses an imaginary line connecting the rear end edges of the first low basis weight region. For example, the absorbent article described in item 1 or item 2 of the scope of patent application, which has a fold line for folding the aforementioned absorbent article, The first low basis weight region is a region where there is no fold line. The absorbent article as described in item 1 or item 2 of the scope of patent application, wherein the rear end edge of the second low basis weight region is located forward of the rear end edge of the absorbent core. The absorbent article described in item 1 or item 2 of the scope of patent application, wherein the rear edge of the second low basis weight region is located at the rear edge of the absorbent core.

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