JP2007275491A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article preventing leakage flowing at a rear part by being tightly fitted to a complicated recessed/projecting shape of a body of a user when being worn. <P>SOLUTION: A sanitary napkin 1 is provided with an absorbent layer 10 having a liquid retaining property and a leakage prevention layer 11 having liquid impermeability, is divided into a front part A, a discharge part facing part B and a rear part C in the longitudinal direction, and has a substantially longitudinally long shape. A skin abutment face side of the absorbent layer 10 in the rear part C has two grooves 8a and 8b, the two grooves 8a and 8b have forward projecting shape respectively, the protruded front part are disposed approximately into a line on a virtual line passing through the central part of the width direction in the napkin 1, and each of the two grooves 8a and 8b has a pair of side parts extending longitudinally rearward in the napkin 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an absorbent article, particularly an absorbent article such as a sanitary napkin or an incontinence pad.

DESCRIPTION OF RELATED ART Conventionally, absorbent articles, such as a sanitary napkin which contacts from a wearer's excretion part to a hip part, are known. This type of absorbent article is used when the amount of body fluid excreted is large or when the usage time is long, such as at night. In particular, during nighttime bedtime use, a relatively viscous body fluid excreted from the excretion part of the wearer spreads to the hip part through the wearer's skin and is transferred to the back part of the absorbent article. Is likely to occur.
The cause of this transfer is that the absorbent article cannot adhere to the complex uneven shape of the wearer's body, and a gap (space) is formed between the absorbent article and the wearer's skin. It is conceivable that the body fluid moves while being transmitted.
For example, an absorbent article for the purpose of preventing side leakage and back leakage is disclosed (Patent Document 1).

  The applicant previously described in Patent Document 1 has a pair of front grooves formed along the longitudinal direction on the skin contact surface of the excretory part contact part that contacts the body fluid excretion part of the wearer when worn. And has a groove formed along the width direction on the skin contact surface of the rear part that is in contact with the back side of the wearer at the time of wearing. The distance between the ends is 10 to 50 mm, and the distance between the innermost portions in the width direction of the sanitary napkin of the pair of front grooves is larger than the distance between the outermost portions in the width direction of the sanitary napkin in the groove. Proposes shorter absorbent articles.

  Moreover, the absorbent article which became the predetermined shape excellent in fitting property at the time of mounting | wearing and was excellent in leak-proof property is disclosed (patent document 2).

  The present applicant previously described in Patent Document 2 was interposed between the liquid-permeable skin contact surface, the liquid-impermeable non-skin contact surface, and the skin contact surface and the non-skin contact surface. An absorptive portion, which is substantially vertically formed and extends from the central portion in the longitudinal direction to the rear portion disposed on the back side of the wearer at the time of wearing, as the edge of the rear portion approaches, the side of the rear portion Proposed is an absorbent article in which a three-dimensional groove close to the edge is formed, and the three-dimensional groove is arranged apart from the end edge and the side edge.

JP-A-10-155832 Japanese Patent Laid-Open No. 10-201788

  The absorbent article described in Patent Document 1 has a configuration for the purpose of preventing side leakage and back leakage, and is considered to prevent the transfer leakage in the rear part of the absorbent article described above to some extent. However, from the viewpoint that the absorbent article is in close contact with the complex uneven shape of the body, there is an aspect where further improvement is expected.

  The absorbent article described in Patent Document 2 has a three-dimensional groove, and is considered to have a certain degree of adhesion to the uneven portion of the hip portion. However, in the same manner as described above, there is an aspect in which further improvement is expected from the viewpoint that the absorbent article is in close contact with the complex uneven shape of the body.

  Therefore, the objective of this invention is providing the absorbent article which improved further the prior art mentioned above from a viewpoint of preventing the transmission leak in the rear part of an absorbent article.

  The present invention is a substantially vertically long absorbent article comprising an absorbent layer and a leak-proof layer, the longitudinal direction of which is divided into a front part, an excretory part facing part and a rear part, and the absorption in the rear part A plurality of grooves are provided on the skin contact surface side of the layer, and each of the plurality of grooves has a convex shape toward the front, and the tip of the convex shape has the absorptivity. Arranged in substantially one row on an imaginary line passing through the center in the width direction of the article, each of the plurality of grooves has a pair of side parts extending toward the rear in the longitudinal direction of the absorbent article. The above-mentioned object is achieved by providing an absorbent article.

  According to the absorptive article of the present invention, at the time of wearing, it adheres to the complicated uneven shape of the wearer's body, thereby preventing the transmission from being transferred in the rear part.

  Hereinafter, a preferred embodiment of the absorbent article of the present invention will be described with reference to FIGS.

The absorbent article of the present embodiment is a sanitary napkin 1 and includes a liquid-retaining absorbent layer 10 and a liquid-impermeable leak-proof layer 11 as shown in FIGS. It is vertically long. The absorbent layer 10 in the napkin 1 is composed of a liquid-permeable top sheet 2 and a liquid-retaining absorbent body 4, and the leak-proof layer 11 is composed of a liquid-impermeable back sheet 3. As for the napkin 1, the longitudinal direction is the front part A, the excretion part opposing part B (part which has the excretion part opposing area | region arrange | positioned facing a wearer's liquid excretion part in the center in the width direction) and back part It is divided into C.
Further, in the napkin 1 of the present embodiment, two grooves 8a and 8b are provided on the skin contact surface side of the absorbent layer 10 in the rear portion C, as shown in FIG. 8b each has a convex shape toward the front, and the tips of the convex shapes are arranged in substantially one row on a virtual line passing through the central portion in the width direction of the napkin 1, and two grooves Each of 8a and 8b has a pair of side portions extending toward the rear of the napkin 1 in the longitudinal direction.
In the present embodiment, the imaginary line passing through the central portion in the width direction of the napkin 1 is the vertical center line CL of the napkin 1.

  The napkin 1 of the present embodiment will be further described. The plan view shape of each of the top sheet 2 and the back sheet 3 is vertically long, and the longitudinal direction thereof coincides with the longitudinal direction of the napkin 1. Yes. As shown in FIG. 4, both side portions of the surface sheet 2 in the longitudinal direction extend from both side edges of the absorbent body 4, and are wound down between the absorbent body 4 and a leak-proof wall 5 to be described later. It is joined to the leak wall 5.

  As shown in FIGS. 4A and 4B, the absorber 4 is sandwiched between the top sheet 2 and the back sheet 3. The absorber 4 has a two-layer structure including an upper absorber 41 and a lower absorber 42 as shown in FIG. The lower absorbent body 42 is vertically long, and the longitudinal direction thereof coincides with the napkin 1. The plan view shape of the lower absorbent body 42 is substantially the same as that of the top sheet 2. In the present embodiment, the upper absorbent body 41 is disposed only in the excretory part facing part B, and forms a so-called middle-high area.

  The back sheet 3 covers the entire region of the absorbent body 4 on the non-skin contact surface side (including the wound surface sheet 2), and extends from the both side edges in the longitudinal direction of the absorbent body 4 outward in the width direction. A flap 71 is formed. As shown in FIG. 2, the side flap 71 further extends outward in the width direction at the position of the excretory part facing part B of the sanitary napkin 1 to form a pair of wing parts 7, 7. The wing part 7 is bent and fixed to an outer surface of an underwear such as shorts by an adhesive or the like when worn.

  The top sheet 2 and the back sheet 3 respectively extend from the front and rear ends in the longitudinal direction of the absorbent body 4 and are bonded to each other by a known bonding method such as heat sealing at the extended portions.

  In the rear part C of the napkin 1 of the present embodiment, on the skin contact surface side of the absorbent layer 10, as shown in FIG. Is provided. Since the front groove 8a and the rear groove 8b are formed in the same manner, the front groove 8a will be described below as an example.

As shown in FIG. 3A, the front groove 8a is formed by a central portion 81a having a convex shape toward the front, and side portions 82a that are continuous with the central portion 81a and extend rearward. Has been. More specifically, the groove 8a has a central portion 81a that is a region divided into the center when the groove 8a is divided into approximately three equal parts in the napkin width direction, and a groove that is divided into approximately three equal parts in the napkin width direction. It is formed from a pair of side parts 82a and 82a which are areas divided into both sides.
The groove 8a is formed by embossing by heat sealing, and joins the topsheet 2 and the lower absorbent body 42.

As shown in FIG. 2, the center portion 81 a has a center in the napkin width direction that is pointed forward and substantially positioned on the vertical center line CL of the napkin 1.
As shown in FIG. 2, each of the pair of side portions 82a and 82a is separated from the longitudinal center line CL while being curved outwardly in the napkin width direction toward the rear from the central portion 81a, and shows a vertex 83a. The napkin is approaching the longitudinal center line CL while curving convexly outward in the width direction. In the present embodiment, each of the pair of side portions 82a and 82a is bent toward the longitudinal center line CL and bent further outwardly in the napkin width direction as described above as it goes rearward from the central portion 81a. However, it is far from the vertical center line CL.
In the present embodiment, the rear end of the side portion 82a is thin and has a sharp shape toward the rear.

  In this specification, unless otherwise specified, the front of the groove 8a means the front of the napkin 1, the rear of the groove 8a means the rear of the napkin 1, and the longitudinal direction of the groove 8 is the longitudinal direction of the napkin 1. And the width direction of the groove 8 means the width direction of the napkin 1.

As shown in FIG. 2, the entire shape of the groove 8a is pointed toward the front side of the napkin, and is curved to protrude outward in the napkin width direction toward the back side of the napkin. After being bound inward in the width direction, it opens while curving convexly outward in the napkin width direction.
The portion of the lower absorbent body 42 located inside the groove 8a having the shape as described above is surrounded by the groove 8a except for the rear, and the surface shape is stable.

In the groove 8a, the length W2 (see FIG. 2) measured in the napkin width direction between the inner edges of the apexes 83 of the pair of side portions 82a and 82a is the inner side in the napkin width direction of the pair of side portions 82a and 82a. The distance between the inner edges of each of the portions that are bound to each other is larger than the length W1 (see FIG. 2) measured in the napkin width direction.
Specifically, the length W2 is 120 to 250%, particularly 130 to 200% with respect to the length W1, which will be described later in detail. When the napkin is worn, the inner portion of the groove 8a is worn. It is preferable when it protrudes toward the person's skin. Further, a length W3 measured in the longitudinal direction of the napkin between a portion where the pair of side portions 82a and 82a are constricted inward in the napkin width direction and a vertex pointed forward in the central portion 81a (FIG. 2). Is preferably 50 to 95%, particularly 60 to 80% with respect to the length W1 for the same reason.

  Further, the width of the groove 8a is such that the central portion 81a is wider than the side portion 82a. When the napkin 1 is worn, the napkin 1 can be easily arranged in the longitudinal direction of the napkin with the central portion 81a as a flexible shaft. It is preferable when it bends. If the width of the side portion 82a is wider than the central portion 81a, when the napkin is worn, the napkin 1 bends in the napkin width direction with the side portion 82a as a flexible shaft, and the skin of the wearer There may be a gap between the napkin 1 and the napkin 1.

More specifically, the width of the central portion 81a in the groove 8a is obtained by measuring the length between both side edges of the central portion 81a as follows. First, a tangent line is drawn at a certain point on one side edge, and the length between the point and the other side edge is measured along a direction orthogonal to the tangent line, and the length is set to the central portion 81a. The width of The width of the central portion 81a is preferably 1.5 to 10.0 mm, particularly preferably 6.0 to 8.0 mm. It is preferable that the width of the central portion 81a is 1.5 mm or more when the napkin 1 is easily and sufficiently bent in the longitudinal direction with the central portion 81a as a flexible shaft when worn. On the other hand, the width of the central portion 81a is 10.0 mm or less, as will be described in detail later. When the napkin 1 was bent at the central portion 81a, the groove was separated from the central portion 81a. This is preferable in that no gap is generated between the front and rear absorbers.
When the width of the central portion 81a is not constant, the minimum value is set.

  Further, the width of the side portion 82a in the groove 8a is also measured in the same manner as the width of the central portion 81a described above. When the width of the side portion 82a is not constant, the maximum value is set.

  The width of the groove 8a is a width when only the groove 8a is targeted, and does not necessarily coincide with the width direction of the napkin 1.

  The rear groove 8b is formed of a central portion 81b and a pair of side portions 82b and 82b, and is formed in the same manner as the front groove 8a described above.

  The front groove 8a is provided in the rear part C located behind the excretory part facing part B. More specifically, it is preferable to provide the groove 8a so that the front end of the groove 8a is positioned 40 to 100 mm, particularly 50 to 80 mm, backward from the excretion point X (see FIG. 2). The excretion point X is the central part in the width direction and the longitudinal direction of the excretion part facing part B, and is a central part that receives excretion of body fluid in the napkin 1.

  In this embodiment, the excretion point X is also a wing center. The wing center is an intersection of a line connecting the longitudinal centers of the pair of wing portions 7 and 7 and the vertical center line CL of the napkin 1. For example, when a napkin having a pair of wing parts is attached to a shorts, a seam of a fabric formed in the narrowest part of the crotch part of the shorts and a wing center of the napkin When matching and attaching the napkin to the shorts, the excretion point X matches the wing center as described above.

The napkin 1 of the present embodiment will be further described. As shown in FIG. 2, the front groove 9 is provided in the excretory part facing part B from the front part A to the rear part C. As shown in FIG. 3B, the front groove 9 includes a central portion 91 having a convex shape toward the front, and a pair of side portions 92 and 92 that are continuous with the central portion and extend rearward. Formed from. The shape of the central portion 91 is the same as that of the central portion 81a of the groove 8a.
Each of the pair of side portions 92, 92 in the front groove 9 is formed by connecting three portions that are convexly curved outward in the width direction in the longitudinal direction. The portion located in the front in the longitudinal direction extends rearward from the central portion 91. The said part located in the middle of the longitudinal direction is formed longer in the longitudinal direction than the other two parts. The said part located in the back of a longitudinal direction is opening, curving convexly toward width direction outward.
The wing center X is located at the central portion of the portion located in the middle of the longitudinal direction.

The front groove 9 is formed by embossing by heat sealing, and joins the top sheet 2 and the lower absorbent body 42.
Moreover, the upper absorber 41 mentioned above is arrange | positioned inside the front groove | channel 9 in the center area | region of the longitudinal direction of the front groove | channel 9, as shown to Fig.4 (a).

As described above, the rear ends of both side portions 92, 92 in the front groove 9 open to the left and right, and extend outward in the napkin width direction. As shown in FIG. 2, the front groove 8 a is disposed so that a part of the front groove 8 a is positioned between the rear ends of both side portions 92, 92 of the front groove 9.
Further, as shown in FIG. 2, the rear groove 8b is arranged immediately behind the front groove 8a.

  In the napkin 1 of the present embodiment, a pair of leak-proof walls 5 and 5 are arranged along the longitudinal direction on the outer sides in the width direction of the absorber 4 as shown in FIG. The leak-proof wall 5 is disposed across the front and rear ends of the napkin 1.

The leak-proof wall 5 includes a base wall portion 51 that stands up from the vicinity of the side surface 43 of the absorber 4 and a planar elastic stretchable portion 52 that is connected to the upper end portion 54 of the base wall portion 51. An elastic member 56 (56a, 56b) is disposed along the longitudinal direction of the napkin 1 to the elastic stretchable portion 52 to give elastic stretchability.
The leak-proof wall 5 is disposed along the side surface 43 of the absorber 4, and the upper surface (skin contact surface side) of the elastic stretchable part 52 is substantially the same as the upper surface (skin contact surface side) of the absorber 4. Parallel. The elastic expansion / contraction part 52 comes into contact with the skin of the wearer at least in the excretion part facing part B at least.

The elastic stretchable part 52 is connected to the upper end part 54 of the base wall part 51 in a T-shaped cross section. That is, the elastic expansion / contraction part 52 protrudes inwardly in the napkin width direction from the upper end part 54 of the base wall part 51 and extends outward in the napkin width direction from the upper end part 54 of the base wall part 51. It is comprised from the outward projecting part 52b.
The projecting widths of the two projecting parts 52a and 52b are different, and the ratio of the projecting width of the inner projecting part 52a to the projecting width of the outer projecting part 52b (the former: the latter) is preferably 3: 2-5. : 1. Each of the inwardly extending portion 52a and the outwardly extending portion 52b has four thread-like inner elastic members 56a and two outer elastic members 56b (only one is shown in FIG. 4). Are arranged at intervals. The elastic member 56 is disposed at least on the excretory part facing part B of the napkin 1.

  The leak-proof wall 5 stands up in the excretion part facing part B, and at least the inner side in the width direction of the elastic expansion / contraction part 52 (inwardly projecting inward) on the front end side in the front part A and the rear end side in the rear part C. The part 52a) is partially fixed to the top sheet 2 so that the standing is inhibited (not standing). The elastic stretchable part 52 is joined to the skin contact surface side of the topsheet 2 by a front seal part 74 on the front side in the longitudinal direction and a rear seal part 75 on the rear side in the longitudinal direction. Therefore, by the contraction of the elastic stretchable part 52, the entire shape of the napkin 1 in the longitudinal direction is curved in a concave shape as shown in FIG.

  The leak-proof wall 5 in the present embodiment is formed by fixing the leak-proof wall-forming sheet 53 to other components (such as the top sheet 2 and the back sheet 3) of the napkin 1. The leak-proof wall forming sheet 53 is a sheet having a constant width in the longitudinal direction, and has a shape in which the upper end portion 54 of the base wall portion 51 and the elastic expansion / contraction portion 52 are continuously provided in a T-shaped cross section. So that it is folded. Therefore, the leak-proof wall forming sheet 53 has two layers in the base wall portion 51 and the elastic stretchable portion 52. In addition, the width | variety of the sheet | seat 53 for leak-proof wall formation is the width | variety of the sheet | seat 53 for leak-proof wall formation of a single-piece | unit state, Comprising: It does not necessarily correspond with the width direction of an absorbent article.

The members constituting the napkin 1 of the present embodiment will be described. As materials for forming the upper absorbent body 41 and the lower absorbent body 42 that form the absorbent body 4, various materials used in conventional absorbent articles and the like. In particular, long fibers such as softwood pulp, chemically treated synthetic pulp, and cellulose tow are preferable. Further, as a material for forming the absorbent body 4, in addition to a pulp material, a polymer-absorbing polymer, a synthetic fiber made of polyester or polypropylene, a heat-fusible fiber, or rayon can also be used. As a material for forming the absorbent body 4, it is also preferable to use a mixture of pulp material and other materials.
Each of the upper absorbent body 41 and the lower absorbent body 42 is preferably wrapped and integrated with a mount or the like, or synthetic fibers are mixed to enhance the integrity.

  About the other structural member in the napkin 1, each forming material used in the conventional absorbent article can be used preferably.

The napkin 1 according to the present embodiment having the above-described configuration is intended to prevent transfer leakage in the rear part by being in close contact with the complicated uneven shape of the wearer's body when worn. As specific means, the napkin 1 is curved in the longitudinal direction of the napkin so as to follow (1) the curved shape of the wearer's hip. (2) The skin contact surface side protrudes toward the wearer's skin so as to follow the concave shape of the wearer's hip.
The mechanism will be described below with reference to FIGS. 5 and 6, only the absorbent body 4 is shown as the napkin 1 for easy understanding.

About the mechanism of said (1) In the wearing condition of the napkin 1 of this embodiment, the shape of the longitudinal direction of the napkin 1 is concavely curved toward the wearer's skin, as shown in FIG. The excretory part facing part B is relatively flat, and the rear part C is largely concavely curved toward the wearer's skin. In the rear portion C of the napkin 1, the central portions 81a and 81b of the grooves 8a and 8b are easily bent as flexible axes, and the napkin 1 is concavely curved toward the wearer's skin in the longitudinal direction. Yes. As a result, the napkin 1 is in close contact with the curved body shape of the wearer's hip.

  At this time, in the groove 8a on the front side of the rear portion C, the portion P of the lower absorbent body 42 located immediately behind the central portion 81a is directed to the front lower side together with the central portion 81a as shown in FIG. It is sinking. The central portion 81a is a highly rigid groove, and is easy to sink toward the front lower side when the napkin is worn. Further, in the present embodiment, the rear end of the front groove 9 opens to the left and right and widens, so that the central portion 81a and the portion P are more likely to sink toward the front lower side.

  When the portion P sinks toward the front lower side, the portion P comes into contact with the portion Q of the lower absorbent body 42 located immediately in front of the central portion 81a, and the central portion 81a is covered by the portions P and Q. Is called. Therefore, on the skin contact surface side of the napkin 1, a continuous absorption surface having no gap in the napkin longitudinal direction is formed at least in the central portion in the napkin width direction.

  Here, the above-described upper limit value of the width of the central portion 81a is preferably set from the relationship with the thicknesses of the portions P and Q. In general, since the thickness of the absorbent body in the sanitary napkin is 1.5 to 7.0 mm, the upper limit value of the width of the central portion 81a is set as described above.

  Further, as shown in FIG. 5, the central portion 81b of the rear groove 8b sinks to the lower front side, similarly to the front groove 8a.

About the mechanism of said (2) In the wearing state of the napkin 1 of this embodiment, the inner part of the front groove | channel 9 in the excretion part opposing part B in a wearer's crotch part is left and right by the inner side of the wearer's thigh. The cross-sectional shape in the width direction receives a compressive force inwardly in the width direction of the napkin, and has a shape that is convexly curved toward the wearer's skin. In this way, due to the influence of the excretion part facing part B of the napkin 1 to be convexly curved, the front groove 8a in the rear part C has a portion inside the groove 8a as shown in FIG. Raises towards the skin and adheres to the concave shape of the hip.

  More specifically, the inner portion of the groove 8a that is pointed forward and narrowed inward in the width direction of the napkin is raised toward the wearer's skin and curved in a concave shape in the wearer's hip Adhere closely to the shape. The apex 83 located at the outermost part in the napkin width direction of each of the pair of side parts 82a, 82a promptly receives the compressive force toward the inner side in the width direction due to the excretion part facing part B of the napkin 1 being curved convexly, A compressive force is transmitted over the whole napkin longitudinal direction of a pair of side part 82a, 82a, and raise of the inner part of the groove | channel 8a is caused.

  Further, the excretion part facing part B of the napkin 1 is curved in the convex shape, so that the central part 81a and the part P are further easily sinked to the front lower side.

  Similarly to the front groove 8a, the inner part of the rear groove 8b also protrudes toward the wearer's skin. In this case, the bulging of the inner portion of the groove 8b is caused by the compressive force toward the inner side in the width direction generated by the bulging of the inner portion of the front groove 8a.

  According to the napkin 1 of the present embodiment, as described above, the central portions 81a and 81b of the grooves 8a and 8b are easily bent in the longitudinal direction of the napkin and the inner portions of the grooves 8a and 8b are raised. The contact surface and the skin of the wearer are in close contact with each other without any gap, and transfer leakage in the rear portion C is prevented.

The napkin 1 of the present embodiment is preferably folded at a vertex 83 of the groove 8 with a fold line that straddles the napkin 1 in the width direction in the individually packaged state.
More specifically, when the napkin 1 is folded for individual packaging, the skin contact surface of the napkin 1 is wrinkled at the fold line. For example, when the napkin 1 is folded in the longitudinal direction in the individually packaged state, in order to use the napkin 1, in the state in which the individually packaged state is opened and expanded in the longitudinal direction, Wrinkles over the napkin width direction occur at two locations. Such wrinkles straddling the napkin width direction are not preferable from the viewpoint of causing side leakage.

Therefore, when the napkin 1 is folded in three for individual packaging, one fold line is formed so as to straddle the napkin 1 in the width direction at the vertex 83b of the side portion 82b of the groove 8b, and the napkin 1 is folded. It is preferable. Wrinkles are generated across the groove 8b in the width direction of the napkin, but when the napkin 1 is worn, the inner part of the groove 8b rises toward the wearer's skin as described above, and is caused by the individual packaging state. I am made to disappear.
The other fold line is preferably formed so as to straddle the napkin 1 in the width direction at the wing center X in the front groove 9 and fold the napkin 1. Like the wrinkle of the groove 8b, the wrinkle of the portion of the wing center X, when the napkin 1 is worn, the inner side of the front groove 9 including the wing center X is raised toward the wearer's skin. The generated wrinkles are made to disappear.

  Next, a modification of the above-described embodiment will be described with reference to FIG. Regarding the modification, the description in detail regarding the above-described embodiment is applied as appropriate to points that are not particularly described. Moreover, in FIG. 7, the same code | symbol is attached | subjected to the same member as FIGS.

As shown in FIGS. 7A and 7B, the napkin 1 according to the modified example has the upper absorbent body 41 disposed also inside the front groove 8a. Therefore, when the napkin is worn, the inner portion of the groove 8a raised toward the wearer's skin is more closely attached to the body shape curved in the recess of the wearer's hip, so that the transfer prevention is further enhanced. ing.
Other configurations are the same as those of the present embodiment described above.

The absorbent article of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention.
For example, the napkin 1 as the absorbent article of the present invention may have three or more grooves 8. Further, the groove 8 may be formed of only the pair of side portions 82 and 82 without having the central portion 81. For example, the groove | channel which has the shape of "V" shape which a front-end | tip part faces front is mentioned.
In addition, the lower absorbent body 42 positioned in front of and behind the grooves 8a and 8b may be cut in the napkin width direction along the front end edges of the grooves 8a and 8b. Moreover, the groove | channel 8 may have a shape as shown to Fig.8 (a) or (b).

The absorbent article of the present invention may be a sanitary napkin, but may be an incontinence pad or the like.
All the parts of only the one embodiment described above can be used together as appropriate.

FIG. 1 is a perspective view showing an embodiment of the absorbent article of the present invention. FIG. 2 is a plan view of the absorbent article of FIG. 3 (a) and 3 (b) are plan views showing the groove and the front groove of FIG. 2, respectively. 4 (a) and 4 (b) are enlarged sectional views showing the embodiment of FIG. 2, (a) is a sectional view taken along the line XX, and (b) is a sectional view taken along the line YY. 5 is a cross-sectional view taken along the line ZZ in FIG. 2 showing a wearing state of the absorbent article in FIG. 1. FIG. 6 is a perspective view showing a wearing state of the absorbent article of FIG. 1. 7 (a) and 7 (b) show a modification of the absorbent article of the present invention, (a) is a plan view corresponding to FIG. 2, and (b) is equivalent to FIG. 4 (b). FIG. 8 (a) and 8 (b) are plan views showing still another embodiment of the absorbent article of the present invention, each having a different groove form.

Explanation of symbols

1 Sanitary napkin (absorbent article)
DESCRIPTION OF SYMBOLS 10 Absorbing layer 11 Leak preventive layer 2 Top sheet 3 Back sheet 4 Absorber 41 Upper absorber 42 Lower absorber 5 Leak preventive wall 51 Base wall part 52 Elastic elastic part 7 Wing part 8 Groove 81 Central part 82 Side part 83 Vertex 9 Front groove 91 Central part 92 Side part A Front part B Excretion part opposing part C Rear part CL Vertical center line (imaginary line which passes through the center part of the width direction in an absorbent article)

Claims (5)

A substantially vertically long absorbent article comprising an absorbent layer and a leak-proof layer, the longitudinal direction of which is divided into a front part, an excretory part facing part and a rear part,
A plurality of grooves are provided on the skin contact surface side of the absorption layer in the rear portion,
Each of the plurality of grooves has a convex shape toward the front, and the convex tip portions are arranged in substantially one line on an imaginary line passing through the central portion in the width direction of the absorbent article. And
The said some groove | channel is an absorbent article which has a pair of side part which each extends toward the back of the longitudinal direction in the said absorbent article. The groove is formed of a central portion having a convex shape toward the front, and the side portions that are continuous with the central portion and extend toward the rear, respectively.
The absorbent article according to claim 1, wherein a width of the groove is wider at the central portion than at the side portion. The central portion is a region divided into a center when the groove is divided into approximately three equal parts in the width direction of the absorbent article, and the center in the width direction is pointed forward and the absorption It is substantially located on the imaginary line that passes through the center in the width direction of the property article,
The side portion is a region divided into both sides when the groove is divided into approximately three equal parts in the width direction of the absorbent article, and shows a vertex away from the virtual line as it goes rearward from the central portion. The absorbent article according to claim 2, wherein the absorbent article is approaching the imaginary line.   The absorbent article according to claim 3, wherein the side part is separated from the imaginary line after being bent away from the imaginary line after being pointed away from the imaginary line as it goes rearward from the central part. The absorbent article in any one of Claims 1-4 folded by the fold line which straddles the said absorbent article in the width direction in the said peak of the said groove | channel.

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