JP6120324B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as sanitary napkins (absorbent articles for women).

  Conventionally, in an absorbent article such as a sanitary napkin, in order to improve leakage prevention and wearability, a groove in which a top sheet and an absorbent body are integrally recessed toward the back sheet side on the skin facing surface Is known to form. In addition, as a sanitary napkin suitable for long-time use at bedtime etc., a sanitary napkin provided with a pair of wings on the front (exhaust part facing part) in the longitudinal direction (longitudinal direction of the napkin) and a rear flap part on the back Are known.

  For sanitary napkins having a wing portion and a rear flap portion and having grooves formed on the skin facing surface, for example, Patent Document 1 discloses a region around the anus facing portion at the rear of the napkin that is placed on the wearer's buttocks side when worn Describes providing a non-grooved portion where no groove is disposed so that the groove is interrupted in the vertical direction. The peripheral area of the anus facing portion is an area that is divided in a vertical direction including the upper part of the dorsal side from a portion facing the anus of the wearer. According to the description of FIG. It is in a position relatively close to the boundary with the wing part on the front side of the part. According to Patent Document 1, when the napkin is worn, the groove non-arranged portion appropriately rises and fits toward the wearer's skin, and therefore, leakage of menstrual blood or the like can be suppressed.

  Further, Patent Document 2 discloses that the shape of the rear flap portion in plan view has a maximum width dimension at the front in the vertical direction for the purpose of improving the shape stability of the rear flap portion when wearing a napkin and preventing leakage of menstrual blood and the like. In addition, it is described that the width dimension (the length in the horizontal direction) gradually decreases toward the rear. In the napkin described in Patent Document 2, a vertically long rear adhesive portion that fixes the rear flap portion to clothes is formed on the non-skin facing surface of each of the pair of rear flap portions. Moreover, according to description of FIG.1 of FIG.1 and FIG.5 of patent document 2, in the right-and-left both sides of the skin opposing surface of the rear part of a napkin, a pair of groove | channels extended in a vertical direction and lateral direction outer than a pair of this groove | channel. A pair of outer grooves that are located in the direction and extend in the vertical direction are formed, and the pair of outer grooves are interrupted on the front side in the vertical direction with respect to the rear adhesive portion. However, Patent Document 2 does not specifically describe the technical significance of the discontinuity of the outer groove.

JP 2009-261777 A Japanese Patent No. 4252439

  This type of absorbent article represented by a sanitary napkin is usually attached to clothing such as shorts and is placed on the crotch. However, this crotch part tends to fluctuate greatly due to body movements such as walking, and the sanitary napkin tends to be twisted. The twist here is not a deformation intentionally generated for the purpose of improving characteristics such as fit, but is an unintended deformation, and refers to what can cause inconveniences such as a decrease in fit and side leakage. In particular, in a sanitary napkin provided with a rear flap portion, if a groove is formed in the skin facing surface in the vertical direction from the excretory portion facing portion to the rear portion, the twist generated in the excretory portion facing portion. May be transmitted to the rear part by the groove, and the flap of the rear flap part may be twisted or turned over. Since the excretory part facing part is a part that is sandwiched between the thighs of the wearer when wearing the napkin, it is easy to receive an external force (compression force) from the lateral direction, and a twist (deformation) is likely to occur compared to the rear part.

  On the other hand, as described in Patent Documents 1 and 2, when the groove extending in the vertical direction from the excretory part facing part to the rear part is interrupted in the middle, the twist generated in the excretion part facing part is Since it is not transmitted to the rear in the longitudinal direction from the interrupted portion, twisting or turning of the rear flap portion is unlikely to occur. However, when the rear part is easily provided in the groove extending in the longitudinal direction, the portion located on the side of the cut part (the lateral center part of the rear part of the napkin) is on the skin side of the wearer when wearing the napkin. As a result, there is a concern that the portion located on the side of the raised portion (back flap portion) may be twisted or turned up. No absorbent article having a high body following ability that can easily follow the change of the movement and posture of the wearer is difficult to cause the twist and turn of the rear part.

  Therefore, the present invention relates to an absorbent article that is less likely to be twisted or turned up at the rear and has high body following ability.

  The present invention comprises a liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body. A longitudinal direction corresponding to the wearer's front-rear direction, comprising an absorbent main body having an excretion part facing part disposed opposite to the excretion part and a rear part disposed on the back side of the wearer with respect to the excretion part facing part And a transverse direction orthogonal thereto, comprising a pair of rear flap portions extending laterally outward from both side portions along the longitudinal direction of the rear portion of the absorbent main body, A vertically long rear adhesive portion for fixing the rear flap portion to clothes is formed on the non-skin facing surface of each of the pair of rear flap portions, and the top sheet and the absorption are formed on the skin facing surface of the absorbent main body. The body is recessed integrally toward the back sheet side. The linear groove includes a vertical groove extending in the longitudinal direction at the rear part, and an inner groove positioned laterally inward from the vertical groove at the rear part. The longitudinal groove has a discontinuity portion that is discontinuous in the longitudinal direction, and the discontinuity portion is sandwiched between two virtual straight lines extending in the lateral direction through the longitudinal front and rear ends of the rear adhesive portion. This is an absorbent article that exists in the part specific region and in which the inner groove exists in the rear part specific region.

  The absorbent article of the present invention is less likely to cause twisting or turning of the rear part (for example, the rear flap part of the sanitary napkin), has high body following ability, and hardly causes side leakage.

FIG. 1 is a plan view showing a skin facing surface side (surface sheet side) of a sanitary napkin that is an embodiment of the absorbent article of the present invention. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. FIG. 3 is an enlarged plan view showing the main part (rear part) of FIG. FIG. 4 is a plan view for explaining a discontinuity portion of the longitudinal groove according to the present invention (the non-recessed portion indicated by reference numeral 83 in FIG. 4 is not the discontinuity portion). FIG. 5 is a view corresponding to FIG. 2 of another example of a sanitary napkin that is an embodiment of the absorbent article of the present invention.

  Hereinafter, the absorbent article of this invention is demonstrated with reference to drawings based on the sanitary napkin which is one preferable embodiment. As shown in FIGS. 1 and 2, the napkin 1 of the present embodiment includes a liquid-retaining absorbent body 4, a surface sheet 2 disposed on the skin-facing surface side of the absorbent body 4, and a non-skin of the absorbent body 4. It has an absorptive main body 5 having a back sheet 3 arranged on the opposite surface side, and has a longitudinal direction X corresponding to the wearer's front-rear direction and a transverse direction Y orthogonal thereto.

  In addition, in this specification, a skin opposing surface is a surface which faces a wearer's skin side at the time of wear of an absorbent article in the absorbent article or its structural member (for example, absorbent main body 5), and is a non-skin opposing surface Is the surface of the absorbent article or its component that is directed to the side opposite to the skin side (clothing side) when the absorbent article is worn. Further, the longitudinal direction X coincides with the direction (longitudinal direction) along the long side of the absorbent article (absorbent body), and the lateral direction Y is perpendicular to the width direction (longitudinal direction) of the absorbent article (absorbent body). Direction).

  The absorptive main body 5 includes an excretion part facing part B disposed opposite to the excretion part of the wearer when worn, and a front part A disposed on the abdomen side (front side) of the wearer from the excretion part facing part B when worn. In the longitudinal direction X, the rear portion C is arranged on the back side (rear side) of the wearer rather than the excretory portion facing portion B when worn. "At the time of wearing" here means a state in which a normal proper wearing position (correct wearing position of the absorbent article) is maintained, and includes when the absorbent article is in a state of being deviated from the wearing position. Absent.

  In addition to the absorbent main body 5, the napkin 1 further includes a pair of wing portions 7, 7 extending outward in the lateral direction Y from both side portions along the vertical direction X of the excretory portion facing portion B of the absorbent main body 5. And a pair of rear flaps 8 and 8 extending outward in the lateral direction Y from both side portions along the longitudinal direction X of the rear portion C in the absorbent main body 5. Such a sanitary napkin having a rear flap part is suitable for long-time use such as at bedtime and is particularly useful as a sanitary napkin for nighttime use.

  In the absorbent article of the present invention, when the excretory part facing part has a wing part like the napkin 1 of the present embodiment, the longitudinal direction of the absorbent article (the longitudinal direction of the absorbent article, (X direction) is a region having a wing portion (a region sandwiched between a base on one side in the vertical direction of the wing portion and a base on the other side). The excretion part opposing part in the absorbent article which does not have a wing part is the transverse direction (width direction of an absorbent article, in the figure) generated when the absorbent article is folded into a tri-fold individual form. The two folding lines (not shown) crossing in the Y direction) are the same as the area surrounded by the first folding line and the second folding curve, counting from the front end in the longitudinal direction of the absorbent article, or The region is narrower than the region.

  As shown in FIG. 2, the top sheet 2 covers the entire skin facing surface of the absorbent body 4, and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4. On the other hand, the back sheet 3 covers the entire area of the non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4 to be described later. A side flap portion 6 is also formed. The back sheet 3 and the side sheet 10 are joined to each other by known joining means such as an adhesive, heat seal, ultrasonic seal, and the like at the extended portions from both side edges along the longitudinal direction X of the absorber 4. The top sheet 2 and the back sheet 3 may be bonded to the absorber 4 with an adhesive.

  The absorber 4 in this embodiment consists of a laminated body of the absorbent sheets 401-403 as shown in FIG. 2, and has the middle-high part 42 in the excretion part opposing part B as shown in FIG.1 and FIG.2. ing. The absorbent body 4 has a structure in which another absorbent sheet 403 is sandwiched between two absorbent sheets 401 and 402, and the other absorbent sheet 403 is disposed in the middle and high part 42. The middle-high part 42 is formed only in the excretion part opposing part B, and is not formed in the front part A and the rear part C. As shown in FIG. 2, the middle-high portion 42 is a portion where the number of laminated absorbent sheets constituting the absorbent body 4 is larger than the portion positioned around the absorbent sheet 4 and is thicker. For this reason, the napkin 1 forms the protruding part which protruded in the excretion part opposing part B at the surface sheet 2 side (skin opposing surface side of the napkin 1). The absorbent body 4 includes a main absorbent body 40 that forms the outer shape of the absorbent body 4, and an auxiliary absorbent body 41 that is smaller than the main absorbent body 40 that is arranged on a part of the main absorbent body 40. Yes. The main absorbent body 40 has a substantially rectangular shape with rounded corners in plan view, and extends from the front part A through the excretory part facing part B to the rear part C and has the same shape and size. 402, the auxiliary absorbent body 41 has a substantially rectangular shape in plan view, and is disposed from the excretory part facing part B to the rear part C in the vicinity thereof. The auxiliary absorbent body 41 is formed by folding a single absorbent sheet 403 into a two-layer structure, and is disposed between the two absorbent sheets 401 and 402 constituting the main absorbent body 40. In the middle-high portion 42, the auxiliary absorbent body 41 (one absorbent sheet 403 folded into a multi-layer structure) is disposed. By arranging the auxiliary absorber 41 on a part of the main absorber 40, the absorption capacity of a part of the absorber 4 can be increased easily and efficiently. Instead of arranging the auxiliary absorbent body 41 between the two absorbent sheets 401 and 402 constituting the main absorbent body 40, the auxiliary absorbent body 41 is disposed on the skin facing surface side of the upper absorbent sheet 401 constituting the main absorbent body 40. You may laminate | stack, and may laminate | stack on the non-skin opposing surface side of the lower absorbent sheet 402 which comprises the main absorber 40. FIG. Further, the absorbent sheets may not be joined, or may be adhered by a sparsely spread adhesive or the like.

  In the absorber 4, the thickness of the middle-high portion 42 is preferably 0.7 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 4 mm or less. More specifically, the thickness of the middle-high portion 42 is preferably 0.7 mm or more and 5 mm or less, and more preferably 1 mm or more and 4 mm or less. By setting the thickness of the middle-high portion 42 within this range, it becomes easy to achieve both good wearing feeling and high absorption performance in the excretory portion-facing portion B where the middle-high portion 42 is formed. Moreover, when the absorbent article is equipped with the wing part like the napkin 1 of this embodiment, it becomes easy to suppress the twist of the absorber in the excretion part opposing part at the time of the wear. Regarding the thickness of the absorbent body 4 other than the middle-high portion 42, that is, the thickness of the main absorbent body 40 (a laminate of two absorbent sheets 401 and 402), it is preferably 0.3 mm or more, more preferably 0.5 mm or more. And preferably 3 mm or less, more preferably 2.5 mm or less. More specifically, the thickness of the main absorbent body 40 is not less than 0.5 mm and not more than 3 mm, and further not less than 0.6 mm and not more than 2.5 mm, thereby enhancing the high absorption performance and the followability to the wearer's movement. It is preferable from the viewpoint.

  Moreover, in the absorber 4, the thickness difference (step) between the middle and high portions 42 and the peripheral portion thereof or the vicinity thereof is preferably 2 mm or less, and more preferably 1.5 mm or less. The purpose is to suppress the occurrence of twisting in the vicinity of the boundary between the middle-high portion 42 and the region where only the main absorber 40 in the peripheral portion exists in the excretory portion facing portion B. If this step is large, the napkin 1 tends to fill the gap due to the step when the napkin 1 follows the movement of the wearer during wearing. By setting within the range, the effect of suppressing the occurrence of twisting in the excretory part facing part B is enhanced. The thickness of each part of the absorber 4 described above is measured by the following method.

<Measurement method of absorber thickness>
The absorber, which is a measurement object, is placed in a horizontal place so as not to be wrinkled or bent, and the thickness under a load of 5 cN / cm ² is measured. A thickness meter PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG.CO.LTD.) Was used for measuring the thickness in the present invention. At this time, a circular plate or a square plate (acrylic plate having a thickness of about 5 mm) in plan view is disposed between the tip of the thickness meter and the measurement portion of the measurement object, and the load is 5 cN / cm ² . Adjust the size of the plate so that

  On both sides along the longitudinal direction X of the skin facing surface of the absorbent main body 5 (skin facing surface of the topsheet 2), as shown in FIG. A pair of side sheets 10, 10 are arranged over substantially the entire length in the longitudinal direction X of the absorbent main body 5. The pair of side sheets 10 and 10 are each a linear first joining line 11 located in the excretory part facing part B, and the longitudinal direction X of the first joining line 11 (front part A and rear part C). It joins to the absorptive main body 5 (surface sheet 2) with the linear 2nd joining line 12 located in this. The first joining line 11 has a curved shape that protrudes outward in the lateral direction Y in plan view, and the second joining line 12 has a linear shape (zigzag line shape) that extends in the longitudinal direction in plan view. ). The side sheet 10 is made of a water-repellent nonwoven fabric. Thus, when the side sheet 10 is joined to the skin facing surface (surface sheet 2) of the absorbent main body 5 by the joining lines 11 and 12, as shown in FIG. A space P defined by the side sheet 10 and the top sheet 2 is formed inward in the direction Y. Since the space P is open toward the center in the lateral direction Y of the absorbent main body 5, excretion fluid such as menstrual blood flowing outward from the center in the lateral direction Y seems to be accommodated in the space P. As a result, the leakage of excretory fluid is effectively prevented.

  As shown in FIG. 1, the side flap portions 6 project greatly outward in the lateral direction Y at the excretory portion-facing portion B, whereby a pair of side flap portions 6 are provided on both the left and right sides along the longitudinal direction X of the absorbent main body 5. The wing portions 7, 7 are extended. In addition, the side flap portion 6 also protrudes outward in the lateral direction Y also at the rear portion C, whereby a pair of rear flap portions 8, 8 are formed on the left and right sides along the longitudinal direction X of the main body 5. It is extended. Further, as shown in FIG. 1, the top sheet 2 and the back sheet 3 extend outward in the longitudinal direction X from the front end and the rear end in the longitudinal direction X of the absorbent body 4. The end seal portion is formed by bonding to each other by a known bonding means such as an agent, heat sealing, ultrasonic sealing or the like.

  The wing part 7 is used by being folded back to the non-skin facing surface (outer surface) side of the crotch part of clothes such as shorts. As shown in FIG. 1, the wing portion 7 has a substantially trapezoidal shape in which a lower base (a side longer than the upper base) is positioned on the side of the absorbent main body 5 in a plan view. On the non-skin facing surface of the wing part 7, a wing part adhesive part (not shown) for fixing the wing part 7 (napkin 1) to clothing (not shown) such as shorts is formed. The wing portion 7 that is folded back to the non-skin facing surface (outer surface) side of the crotch portion of the clothes can be adhered and fixed to the crotch portion by the adhesive portion. In the napkin 1, the boundary line between the absorbent main body 5 and the wing portion 7 is a straight line (not shown) that connects the roots in the longitudinal direction X of the wing portion 7.

  A longitudinally long face that fixes the rear flap 8 (napkin 1) to clothes (not shown) such as shorts on the non-skin facing surface (the non-skin facing surface of the side seat 10) of each of the pair of rear flaps 8, 8. The rear adhesive part 9 is formed. The rear adhesive portion 9 has a rectangular shape that is long in the vertical direction X in plan view. As shown in FIG. 1, the rear adhesive portion 9 in one rear flap portion 8 and the rear adhesive portion 9 in the other rear flap portion 8 have the same shape and the same size and are located at the same position in the longitudinal direction X. The absorbent main body 5 is formed symmetrically with respect to a center line (not shown) that bisects the transverse body Y in the lateral direction Y. The rear flap portion 8 is not folded back when it is fixed to the clothes, and the non-skin facing surface is spread (in a state extended to the side of the absorbent main body 5), and the rear adhesive portion 9 is interposed therebetween. And adhesively fixed to the skin facing surface (inner surface) of the clothes. The back adhesive part 9 and the wing part adhesive part are provided by applying a hot melt adhesive to a predetermined location, and are covered with a release sheet (not shown) made of a film, a nonwoven fabric, paper, or the like before the napkin 1 is used. Has been.

  As shown in FIGS. 1 to 3, the top sheet 2 and the absorbent body 4 are integrally recessed toward the back sheet 3 side on the skin facing surface of the absorbent main body 5 (skin facing surface of the top sheet 2). A linear groove extending in the longitudinal direction X in the rear part C, and an inward located inward in the lateral direction Y from the vertical groove 51 in the rear part C. Groove 61. Since the vertical groove 51 is a groove located outward in the lateral direction Y from the inner groove 61, it can be said to be an outer groove (outer vertical groove). Here, regarding the inward groove 61, “located inward in the lateral direction from the longitudinal groove” means that the inward groove 61 is inward of the longitudinal groove 51 on the same virtual straight line parallel to the lateral direction Y. Means to be located in A linear groove | channel can be formed in accordance with a conventional method by pressing process with or without heat, or embossing, such as ultrasonic embossing. In the linear groove, the topsheet 2 and the absorber 4 are integrated by heat fusion or the like.

  When such a linear groove is formed on the skin-facing surface of the napkin 1, the diffusion of the liquid in the planar direction of the absorbent body 4 is effectively suppressed, and the twist of the absorbent body 4 is prevented. it can. The formation of the linear groove is particularly effective for preventing diffusion of excretory fluid such as menstrual blood and improving adhesion to the body when worn. In particular, the vertical groove 51 located in the rear part C effectively prevents the back part C from being twisted and leaking in the rear oblique direction, and the inward groove 61 follows the groove of the wearer's buttocks when the napkin 1 is worn. Thus, back leakage can be effectively prevented. What is necessary is just to set the width | variety (length of the direction orthogonal to a length direction) and depth of a linear groove similarly to the linear groove in this kind of absorbent article.

  Here, “extending” with respect to the longitudinal groove is not limited to a state in which the longitudinal groove is continuous without being interrupted, but has a relatively short length (approximately 8 mm or less) such as interrupted portions 52A and 52B described later. In addition, there may be a portion (non-recessed portion) where the concave portion (embossed portion) constituting the vertical groove does not exist, and it is only necessary that the entire vertical groove is substantially continuous in the vertical direction. In addition, “linear” in the linear groove is not limited to a straight line in the plan view, but includes a curved line, and each line may be a continuous line or a broken line. For example, the linear groove may be constituted by a row formed by a large number of discontinuous embosses (for example, point embosses). In this case, the distance between the adjacent embosses is shorter than the length of the interrupted portion.

  As shown in FIG. 1, a pair of vertical grooves 51 are formed across a center line (not shown) that bisects the absorbent main body 5 in the lateral direction Y. It is formed symmetrically with respect to the center line. The pair of longitudinal grooves 51, 51 extend not only to the rear part C but also to the excretion part facing part B and the front part A. In the excretion part facing part B, the outer side in the lateral direction Y of the middle-high part 42 The direction extends in the longitudinal direction X. Moreover, in the excretion part opposing part B, the vertical groove 51 becomes the convex curve shape toward the inner side of the horizontal direction Y, and goes toward the center side from the front-and-rear end side of the vertical direction X of the excretion part opposing part B. The space between the pair of longitudinal grooves 51, 51 is narrow. In the napkin 1 of this embodiment, the middle-high part 42 of the absorber 4 is arranged in the excretory part facing part B, and the center in the longitudinal direction X of the middle-high part 42 is worn by the pair of vertical grooves 51, 51 of the configuration. It is easy to be raised toward the skin side. Moreover, since the 1st junction part line | wires 11 of the side seat | sheet 10 and the absorptive main body 5 become the convex curve shape toward the outward of the horizontal direction Y in the excretion part opposing part B, FIG. As shown in FIG. 4, in the central region in the longitudinal direction X of the excretory part facing part B, the gap between the groove 51 and the first joining line 11 is wider than the front and rear regions. Therefore, the body fluid that has passed over the groove 51 is guided to the space portion P (see FIG. 2) defined by the side sheet 10 and the top sheet 2 while spreading in the longitudinal direction of the longitudinal direction X. The liquid flow rate to the part is suppressed. In addition, the central region in the vertical direction X of the excretory part-facing portion B is compared to the front and rear regions because the first joining line 11 has a convex curved shape outward in the lateral direction Y. And since the capacity | capacitance of the space part P is large, the inconvenience which a body fluid leaks over the side sheet | seat 10 to a horizontal direction side part is easy to be suppressed.

  In the present embodiment, as the linear grooves, as shown in FIG. 1, in addition to the grooves 51 and 61 extending in the vertical direction X, horizontal grooves 71 and 72 extending in the horizontal direction Y are further provided in the vertical direction of the absorbent main body 5. They are formed in this order from the front side to the rear side in the direction X. The lateral groove 71 is located at the front portion A and is curved in a convex shape toward the front end in the longitudinal direction X of the absorbent main body 5 in plan view, and the lateral groove 72 is located at the rear portion C and is planar. As viewed, the groove is convexly convex toward the rear end of the longitudinal direction X of the absorbent main body 5, and both grooves 71 and 72 have the same planar view shape except for the convex direction. The convex tops of the lateral grooves 71 and 72 are located at the center in the lateral direction Y of the absorbent main body 5. The pair of vertical grooves 51 and 51 and the horizontal grooves 71 and 72 are connected at the end portions in the length direction thereof, whereby the groove facing the skin facing surface of the absorbent main body 5 has an annular shape (substantially elliptical shape) in plan view. Is formed. Here, the “plan view” means that the napkin 1 is seen in a planar shape from the skin contact surface side as shown in FIG.

  The inner groove 61 has a substantially U-shape convex toward the rear end of the longitudinal direction X of the absorbent main body 5 in a plan view as shown in FIG. 1, and the top of the convex portion is the rear end of the longitudinal direction X. 61b. A rear end 61 b (a U-shaped convex top) of the U-shaped inner groove 61 is located at a substantially center in the longitudinal direction X of the rear flap 8. Further, the front ends 61a, 61a in the longitudinal direction X of the U-shaped inner groove 61 are located at or near the boundary 15 between the excretory part facing part B and the rear part C (within 5 mm from the boundary 15), Thereby, diffusion of the excretion fluid such as menstrual blood leaking from the excretion portion facing portion B is effectively prevented by the inner groove 61. The boundary 15 between the excretory part facing part B and the rear part C is "a straight line connecting the roots on the rear side in the longitudinal direction X of the pair of wing parts 7 and 7" or "the rear end of the middle and high part 42 in the longitudinal direction X. It is also the position where the longitudinal front end 8a of the rear flap 8 exists. A portion (a portion other than the rear end 61b and the vicinity thereof) extending in the vertical direction in the U-shaped inner groove 61 is such that the front end 61a in the vertical direction X is outward in the lateral direction Y from the rear end in plan view. It is inclined with respect to the vertical direction X so as to be positioned. That is, the inward groove 61 has a U-shape in which the front end 61a side extends laterally outward from the rear end 61b side and opens toward the front part A side in plan view, and the rear end part 61b The distance (lateral width) between the pair of grooves 61, 61 constituting the U-shape is narrowed as it goes. This makes it possible to effectively achieve both fit to the wearer's buttocks and suppression of excrement leakage.

  As one of the main features of the napkin 1 of the present embodiment, as shown in FIGS. 1 and 3, the longitudinal groove 51 is interrupted in the longitudinal direction X, and the interrupted portions 52 </ b> A and 52 </ b> B are the longitudinal features of the rear adhesive portion 9. It exists in the rear part specific area CS sandwiched between two virtual straight lines L1, L2 extending in the horizontal direction Y through the front and rear ends 9a, 9b in the direction X, and is an inward groove in the rear part specific area CS. The point where 61 exists is mentioned.

  Here, “the longitudinal grooves (grooves extending in the longitudinal direction) are interrupted in the longitudinal direction” means that when the longitudinal grooves are viewed along the longitudinal direction X, the recessed portions (embossed portions) constituting the longitudinal grooves. This means that there is a portion where there is no (non-recessed portion, non-embossed portion). That is, one virtual straight line crossing the vertical groove in the horizontal direction Y is maintained in the vertical direction X over the entire length of the vertical groove while the length direction of the virtual straight line is matched with the horizontal direction Y. When there is a portion where the imaginary straight line and the concave portion constituting the vertical groove do not overlap when moved, the vertical groove is assumed to be interrupted in the vertical direction X, and the non-overlapping portion is the “interrupted portion”. It is. Therefore, for example, a twist (deformation) occurs in the absorbent main body on the front side in the longitudinal direction X from the “interruption portion” of the longitudinal groove, and the twist propagates to the rear side in the longitudinal direction X through the longitudinal groove. The propagation of the twist is cut off at the “interruption portion” and does not propagate to the rear side in the vertical direction X from the “interruption portion”. The “interruption portion” indicated by reference numerals 52A and 52B in FIGS. 1 and 3 satisfies the condition for discontinuation of such vertical grooves.

  On the other hand, for example, in the longitudinal groove 80 shown in FIG. 4, the two continuous linear grooves 81 and 82 constituting the longitudinal groove 80 are not connected to each other, and a non-recessed portion (non-recessed portion) is formed between the grooves 81 and 82. Embossed portion) 83 exists, but one imaginary straight line L0 that crosses the vertical groove 80 in the horizontal direction Y is moved in the vertical direction X while the length direction thereof is matched with the horizontal direction Y. In this case, the imaginary straight line L0 always overlaps with the concave portions constituting the vertical groove 80, including the portion where the non-concave portion 83 exists, so that the vertical groove 80 is not interrupted in the vertical direction, and the non-concave portion 83 This is not the “discontinuous part” in the invention. Therefore, if a twist occurs in the absorbent main body on the front side in the longitudinal direction X (the upper side in FIG. 4) with respect to the non-recessed portion 83, the twist is caused in the vertical direction via the portion where the non-recessed portion 83 exists. It propagates to the rear side of X (the lower side in FIG. 4).

  Moreover, regarding the “rear part specific area” according to the present invention, in the present embodiment, as shown in FIGS. 1 and 3, one rear adhesive part 9 and the other rear adhesive part in the pair of rear flap parts 8 and 8. 9 is formed symmetrically with respect to a center line (not shown) that bisects the absorbent main body 5 in the lateral direction Y, and therefore, the rear portion specific region CS is defined between the two adhesive portions 9 and 9. Although the virtual straight lines L1 and L2 coincide with each other, when one rear adhesive part and the other rear adhesive part are formed asymmetrically in the left-right direction, the pair of asymmetrical adhesive parts between the left and right sides respectively Two virtual straight lines extending in the horizontal direction through the two virtual straight lines do not coincide with each other, and two virtual straight lines passing through the longitudinal front and rear ends of one rear adhesive part and two virtual straight lines passing through the longitudinal front and rear ends of the other rear adhesive part A total of four virtual straight lines with straight lines do not overlap each other. It will be present to. In that case, if a region sandwiched between two imaginary straight lines extending in parallel to the lateral direction Y through the longitudinal front and rear end portions of either the left or right rear adhesive portion 9 is defined as a “rear portion specific region”. Well, preferably, an area defined by two of the four virtual straight lines positioned inward in the vertical direction (an area where one rear adhesive part and the other rear adhesive part overlap in the vertical direction) is referred to as “rear part. Specific area ”.

  As shown in FIGS. 1 and 3, each of the pair of vertical grooves 51 and 51 has a plurality (two) of discontinuous portions 52A and 52B, and all of the plural discontinuous portions 52A and 52B are rearward. It exists in the part specific area CS. In addition, among the plurality of discontinuous portions 52A and 52B, only the discontinuous portion 52A located at the forefront in the vertical direction X exists on the side of the inward groove 61, and the discontinuous portion 52B located at the rear is the inward groove. It doesn't exist on the side of 61. The inward groove 61 does not have the “interrupted portion” in the present invention and is continuous. The rear end 61b (the U-shaped convex top) of the inward groove 61 is a discontinuous portion 52A located at the forefront in the vertical direction X in the rear portion specific region CS among the discontinuous portions of the vertical groove 51. And the discontinuous portion 52B located at the rear end.

  In the napkin 1, the vertical groove 51 is discontinuous in the longitudinal direction X at the rear portion C, so that when the napkin 1 is worn, the twist generated in the excretory portion facing portion B becomes the discontinuous portion 52A (a plurality of discontinuous portions 52A). Since the rear flap portion 8 is less likely to be twisted or turned over than the discontinuous portion located at the forefront in the vertical direction X), the back flap portion 8 is less likely to be twisted or turned over, and the horizontal portion Y of the interrupted portion 52A The central portion in the lateral direction of the absorbent main body 5 located on the inside, particularly the portion surrounded by the U-shaped inner groove 61 in plan view, is moderately raised toward the wearer's skin side, and as a result, Part C follows the wearer's various movements and changes in posture to fit the body. If the bulge in the lateral direction Y of the interrupted portion 52A is too large, there is a risk that the outer side of the interrupted portion 52A in the lateral direction Y (rear flap portion 8) may be twisted or turned up. Since the discontinuous portion 52A exists in the rear portion specific region CS that is a region sandwiched between the pair of rear adhesive portions 9 and 9, the bulge does not generate a twist or turn of the rear flap portion 8. Moderately suppressed. In addition, since the discontinuous portion 52B exists behind the inner groove 61 in the longitudinal direction X, the rear side of the inner groove 61 absorbs without causing an appropriate bulge due to the inner groove 61. In the state where the sex main body 5 is maintained in a substantially flat state, the discontinuity portion 52B becomes a starting point and becomes easier to follow along the body, so that the body followability of the rear portion C is improved. Therefore, the napkin 1 is less likely to be twisted or turned over at the rear part C (rear flap part 8), and has a high body following ability that can follow various movements and changes in posture of the wearer.

  The expression of the above-mentioned effect (the back part is not likely to be twisted or turned over and is excellent in the body following ability) is “the longitudinal groove 51 is interrupted in the longitudinal direction X, and the interrupted part is in the rear part specific region CS. And the inner groove 61 is present in the rear specific area CS "(basic configuration) is essential, and other configurations included in the napkin 1 of the present embodiment, for example, the following configurations 1 and 2 Is not required. Therefore, in the present invention, it is only necessary that any one of the plurality of discontinuous portions of the vertical groove 51 exists in the rear portion specific area CS, and the side of the discontinuous portion in the rear portion specific area CS. The inner groove does not have to exist. However, by providing at least one of the following configurations 1 and 2 in addition to the basic configuration, the expression of the operational effect is further ensured.

Configuration 1: Of the plurality (two) of discontinuous portions 52A and 52B of the vertical groove 51, the foremost discontinuous portion 52A located in the forefront in the vertical direction X exists in the rear portion specific region CS ( All of the plurality of discontinuous portions 52A and 52B included in the vertical groove 51 exist in the rear portion specific area CS).
Configuration 2: An inner groove 61 exists on the side (outward in the lateral direction Y) of the discontinuity of the vertical groove 51 (particularly, the front discontinuity 52A) in the rear specific area CS.

  From the viewpoint of further ensuring the expression of the above-described effects, the length T1 (see FIG. 1) of the rear adhesive portion 9 in the vertical direction X is the length T2 of the rear flap portion 8 in the vertical direction X (see FIG. 1). Is preferably 10% or more, more preferably 15% or more, and preferably 30% or less, more preferably 25% or less, more specifically preferably 10 to 30%, and more preferably 15 to 25%. Further, the length T1 of the rear adhesive portion 9 is preferably 15 mm or more, more preferably 20 mm or more, and preferably 50 mm or less, more preferably 45 mm or less, more specifically, preferably 15 to 50 mm, more preferably. Is 20-45 mm. In addition, the back adhesion part 9 may be comprised from the some adhesive element located in a line with the vertical direction X. FIG. In this case, the length in the vertical direction X is the distance from the front end of the adhesive element present on the frontmost side to the rear end of the adhesive element present on the rearmost side.

  From the same viewpoint, the length T3 (see FIG. 1) from the boundary 15 between the excretory part facing part B and the rear part C (the longitudinal front end 8a of the rear flap part 8) to the longitudinal front end 9a of the rear adhesive part 9 is The thickness is preferably 60 mm or more, more preferably 65 mm or more, and preferably 90 mm or less, more preferably 80 mm or less, more specifically preferably 60 to 90 mm, and more preferably 65 to 80 mm.

  From the same viewpoint, the length in the longitudinal direction X of each of the discontinuous portions 52A and 52B is preferably 3 mm or more, more preferably 3.5 mm or more, and preferably 8 mm or less, more preferably 7 mm or less, more specifically. Is preferably 3 to 8 mm, more preferably 3.5 to 7 mm.

  If the longitudinal groove 51 has the discontinuous portions 52A and 52B, menstrual blood or the like existing in the lateral direction Y of the longitudinal groove 51 depending on the length of the longitudinal portions X of the discontinuous portions 52A and 52B. There is a concern that the excretion fluid of the blood will move outward in the lateral direction Y through the discontinuous portions 52A and 52B, thereby inducing lateral leakage. However, in the present embodiment, as described above, the space portion P (see FIG. 2) defined by the side sheet 10 and the top sheet 2 is formed outside the interrupted portions 52A and 52B in the lateral direction Y. Therefore, even if the excretion fluid moves outward in the lateral direction Y through the interrupted portions 52A and 52B, the excretion fluid is accommodated in the space portion P. It is difficult for the outside to move and side leakage hardly occurs.

  As shown in FIG. 3, the pair of vertical grooves 51 and 51 each have a dividing region 53 sandwiched between two discontinuous portions 52 </ b> A and 52 </ b> B adjacent in the vertical direction X in the rear portion specific region CS. . Each segmented region 53 is inclined with respect to the longitudinal direction X so that the longitudinal front end 53a is located inward of the lateral direction Y from the longitudinal rear end 53b in plan view, and a pair of segmented regions 53, 53 is provided. Is gradually shortened toward the front in the vertical direction X. That is, the pair of divided regions 53 and 53 in the rear portion specific region CS has a letter C (eight character) shape in plan view, and thus the divided region 53 maintains the surface shape more stably. However, it comes to follow a wearer's body and the body follow-up property is further improved.

  When the formation material of each part in the napkin 1 is demonstrated, the various things conventionally used in the said technical field can be especially used as the surface sheet 2 and the back surface sheet 3 without a restriction | limiting. As the surface sheet 2, for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used. Moreover, as the back sheet 3, a liquid-impermeable material or a water-repellent material can be used. As the liquid-impermeable material, a resin film, a resin film having fine pores and moisture permeability, a laminate material of a resin film and a nonwoven fabric, and the like can be used. A composite nonwoven fabric having a multilayer structure composed of bond, meltblown, spunbond, or the like, a spunbond nonwoven fabric, a heat bond nonwoven fabric, an air-through nonwoven fabric, or the like can be used.

  The absorbent body 4 is not a laminated body obtained by stacking fiber materials such as wood pulp from the viewpoint of thinning and low rigidity of the napkin 1, but is thinner and less rigid than the stacked fiber body. It is desirable to use an absorbent sheet. In the napkin 1 of the present embodiment, as the absorbent sheets 401 to 403, between the constituent fibers and the constituent fibers through the adhesive force generated in the wet water-absorbing polymer and a binder such as an adhesive or an adhesive fiber added separately. It is preferable to use a sheet formed by bonding between the water-absorbing polymer and the water-absorbing polymer. Further, as the absorbent sheet, an absorbent sheet manufactured by the method described in JP-A-8-246395, pulverized pulp supplied in an air stream and a water-absorbing polymer are deposited, and then an adhesive (for example, acetic acid) is used. Dry sheets hardened with vinyl adhesives, PVA, etc.) Absorbent sheets obtained by applying a hot-melt adhesive between paper and non-woven fabric and then spraying a superabsorbent polymer, spunbond or melt blown non-woven fabric An absorbent sheet or the like obtained by blending a superabsorbent polymer during the production process can be used. As a suitable absorbent sheet, a water absorbent polymer is fixed to an aggregate of pulp fibers, a dry pulp sheet produced by an airlaid method, and a particulate water absorbent polymer is dispersed between two nonwoven fabrics. Things. These absorptive sheets can be used as a sheet-like absorber by cutting one sheet into a predetermined shape. The thickness per sheet of the absorbent sheet is preferably 0.1 mm or more, particularly 0.3 mm or more, and preferably 2 mm or less, particularly 1.5 mm or less. More specifically, it is preferably 0.1 mm or more and 2 mm or less, particularly preferably 0.3 mm or more and 1.5 mm or less.

  However, as the absorbent body 4, a pile-type absorbent body may be used instead of the above-described absorbent sheet. FIG. 5 shows a cross-sectional view (corresponding to FIG. 2) of the napkin 1A provided with the absorbent body 4A, which is an example of this pile-type absorbent body, along the lateral direction Y in the excretory part facing part. . In this case, the absorbent body 4A has a laminated structure formed by laminating a plurality of (2) stacked-type absorbent bodies, has a substantially rectangular shape with rounded corners in plan view, and excretes from the front part A. The lower layer absorber 45 extending over the rear part C through the facing part B, and the skin facing surface of the central part in the lateral direction Y of the lower layer absorbent body 45 in the excretion part facing part B, which is narrower than the lower layer absorber 45 It has the upper layer absorber 46 arrange | positioned at the side. The upper-layer absorber 46 and the lower-layer absorber 45 are separate structures, and these laminates form the middle-high portion 42. The upper layer absorber 46 has a rectangular shape in plan view, and is arranged on the lower layer absorber 45 with its longitudinal direction coinciding with the longitudinal direction of the lower layer absorber 45. The lower layer absorber 45 and the upper layer absorber 46 may be joined by an adhesive. The thickness of the lower layer absorber 45 is preferably 0.3 mm or more, more preferably 0.5 mm or more, and preferably 3 mm or less, more preferably 2.5 mm or less. More specifically, the thickness of the lower layer absorber 45 is not less than 0.5 mm and not more than 3 mm, and further not less than 0.6 mm and not more than 2.5 mm, thereby improving the high absorption performance and the followability to the wearer's movement. It is preferable from the viewpoint.

  As materials constituting the lower layer absorber 45 and the upper layer absorber 46 (stacked type absorber), various materials conventionally used in the technical field can be used without particular limitation, for example, wood pulp, A fiber assembly made of hydrophilic fibers such as synthetic fiber, or a fiber assembly in which a particulate water-absorbing polymer is held can be used. Examples of water-absorbing polymers include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, cross-linked sodium polyacrylate, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride) copolymer. Examples thereof include a polymer and a saponified product thereof, and polyaspartic acid. The absorbent bodies 45 and 46 may include a liquid-retaining absorbent core made of the fiber assembly and the like, and a liquid-permeable core wrap sheet that covers the absorbent core. In that case, the absorbent core and the core wrap sheet may be joined to each other by a joining means such as a hot-melt pressure-sensitive adhesive at a predetermined site. As a core wrap sheet which coat | covers an absorptive core, water-permeable sheets, such as paper, such as tissue paper, various nonwoven fabrics, and an apertured film, can be used, for example.

  Further, in the napkin 1A, as shown in FIG. 5, the side seat 10 has a two-layer structure in which the portion of the napkin 1A located near the center in the lateral direction Y is folded back, and the folded portion is In addition, the side edge 10 is an inner edge along the longitudinal direction X. In addition, about the napkin 1A, the different structure part from the napkin 1 mentioned above is demonstrated, the same component as the napkin 1 is attached | subjected, and description is abbreviate | omitted. The description of the napkin 1 is appropriately applied to components that are not particularly described. The effect similar to that of the napkin 1 can be achieved by the napkin 1A.

  As the side sheet 10, various types conventionally used in the technical field can be used without particular limitation. For example, a liquid-impermeable or water-repellent resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. Can be used. Other materials include, for example, spunbond nonwoven fabrics, composite sheets of spunbond nonwoven fabric (S) and meltblown nonwoven fabric (M) (for example, SM, SMS, SMMS, etc.), heat roll nonwoven fabrics, air-through nonwoven fabrics and the like. An aqueous (hydrophobic) non-woven fabric may be mentioned. In particular, it is preferable to use a water-repellent air-through non-woven fabric from the viewpoint of touch and prevention of lateral leakage.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, the napkin 1, 1A may not have the wing part 7. Moreover, you may provide the main body adhesive part which fixes this main body 5 (napkin 1) to clothing, such as shorts, in the non-skin opposing surface (non-skin opposing surface of the back surface sheet 3) of the absorptive main body 5. In addition to sanitary napkins, the absorbent article of the present invention can also be applied to panty liners (origami sheets), incontinence pads, and the like.

  Regarding the above-described embodiment of the present invention, the following additional notes are disclosed.

<1> A liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body, and excreted by the wearer when worn A longitudinal direction corresponding to the wearer's front-rear direction, comprising an absorptive main body having an excretion part facing part disposed opposite to the part and a rear part arranged on the back side of the wearer from the excretion part facing part; An absorbent article having a lateral direction perpendicular thereto, comprising a pair of rear flap portions extending laterally outward from both side portions along the longitudinal direction of the rear portion of the absorbent main body, A vertically long adhesive portion for fixing the rear flap portion to the clothes is formed on the non-skin facing surface of each of the rear flap portions, and the top sheet and the absorbent body are formed on the skin facing surface of the absorbent main body. Is recessed integrally toward the back sheet side. The linear groove includes a vertical groove extending in the longitudinal direction at the rear portion, and an inward groove positioned laterally inward from the vertical groove in the rear portion, The vertical groove is interrupted in the vertical direction, and the interrupted portion exists in a rear portion specific region sandwiched between two virtual straight lines extending in the lateral direction through the longitudinal front and rear ends of the rear adhesive portion. And the absorptive article in which said inward groove exists in this back part specific field.
<2> The absorbent article according to <1>, wherein the length of the discontinuous portion in the vertical direction is 3 mm or more and 8 mm or less.
<3> The absorbent article according to <1> or <2>, wherein the length of the rear adhesive portion in the vertical direction is 15 mm or more and 50 mm or less.

<4> The longitudinal groove has a plurality of the discontinuous portions, all of the plural discontinuous portions exist in the rear portion specific area, and among the discontinuous portions, the longitudinally forwardmost portion. The absorbent article according to any one of <1> to <3>, wherein the discontinuous portion that is located is present on a side of the inner groove.
<5> A pair of the longitudinal grooves are formed across a center line that bisects the absorbent main body in the lateral direction, and the pair of longitudinal grooves are sandwiched between the two discontinuous portions adjacent in the longitudinal direction. The divided region is located in the rear portion specific region, and the divided region is inclined with respect to the vertical direction so that the front end in the vertical direction is located inward in the horizontal direction from the rear end in the vertical direction in plan view. The absorbent article according to <4>.
<6> The longitudinal length of the rear adhesive portion is 10 to 30% of the longitudinal length of the rear flap portion, and from the boundary between the excretory portion facing portion and the rear portion, The absorbent article according to any one of <1> to <5>, wherein the length to the front end in the longitudinal direction is 60 to 90 mm.
<7> The absorptivity according to any one of <1> to <6>, wherein a longitudinal front end of the inward groove is present at or near a boundary between the excretory part facing part and the rear part. Goods.

<8> The front side of the inward groove extends in the laterally outward direction from the rear end side in a plan view, and is disposed on the abdomen side of the wearer rather than the excretory part facing part when worn. The absorbent article according to any one of <1> to <7>, wherein the absorbent article has a U-shape that is open toward the part.
<9> The rear end of the inward groove is located between the foremost discontinuous portion in the longitudinal direction and the rearmost discontinuous portion in the rear portion specific region. <1> to <8 > Any one of>.
<10> The absorbent article according to any one of <1> to <9>, wherein the absorbent body includes a middle-high portion having a thickness larger than that of the surrounding portion in the excretory portion-facing portion.
<11> The absorbent article according to <10>, wherein the middle and high portions have a thickness of 0.7 mm to 5 mm.
<12> The absorbent article according to <10> or <11>, wherein the middle-high portion is present only in the excretory portion-facing portion.

<13> The absorbent article according to any one of <10> to <12>, wherein the absorber includes an absorbent sheet.
<14> In the absorbent sheet, a water absorbent polymer is fixed to an aggregate of pulp fibers, a dry pulp sheet produced by an airlaid method, or a particulate water absorbent polymer is dispersed between two nonwoven fabrics. The absorbent article according to <13>, which is a product.
<15> The absorbent article according to <13> or <14>, wherein the middle and high portions are provided with a structure in which the absorbent sheet is folded to have a multilayer structure.
<16> The absorbent body has a structure in which another absorbent sheet is sandwiched between two absorbent sheets, and the other absorbent sheet is disposed in the middle-high portion. The absorbent article according to any one of> to <15>.

<17> The absorbent article according to <10>, wherein the middle and high portions have a structure in which an upper layer absorber is laminated on a lower layer absorber, and the thickness of the lower layer absorber is 0.3 mm or more and 3 mm or less.
<18> The absorbent article according to any one of <10> to <17>, wherein a thickness difference (step) between the middle and high portions and the peripheral portion thereof is 2 mm or less.
<19> The longitudinal groove is a discontinuous line formed of a row of a large number of discontinuous embosses, and the longitudinal length of the discontinuous portion is between adjacent embosses in the large number of the embosses. The absorbent article according to any one of the above items <1> to <18>, which is longer than a distance of.

<20> A pair of side sheets is arranged over substantially the entire length in the vertical direction of the absorbent main body so as to overlap both left and right side portions along the vertical direction of the absorber in plan view, and the pair of side sheets Are joined to the absorbent main body by a linear first joining line located at the excretory part facing part and a linear second joining line located before and after the first joining line in the longitudinal direction. <1> to <19, in which a space portion defined by the side sheet and the top sheet is formed inward in the lateral direction from the first joint line and the second joint line. > Any one of>.
<21> The absorbent article according to <20>, wherein the first joint line has a curved shape that is convex outward in the lateral direction in a plan view.
<22> The absorbent article according to <21>, wherein the longitudinal groove has a curved shape that protrudes inward in the lateral direction in a plan view in the excretory part-facing part.
<23> The absorbent article according to any one of <20> to <22>, wherein the second joining line is a linear shape extending so as to intersect in a vertical direction in a plan view.

<24> The absorbent article according to any one of <1> to <23>, wherein the absorbent article includes a pair of wing parts on both lateral sides of the excretory part facing part.
<25> The absorbent article is not provided with a wing portion, and is folded in three in the vertical direction by two fold lines extending in the horizontal direction, and a region sandwiched between the two fold lines is The absorbent article according to any one of <1> to <23>, which is the excretory part-facing part.
<26> The absorbent article according to any one of <1> to <25>, wherein the absorbent article is a sanitary napkin.

1,1A Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4, 4A Absorbent body 40 Main absorbent body 41 Auxiliary absorbent body 401, 402, 403 Absorbent sheet 42 Middle-high part 45 Lower layer absorbent body (stacked type absorbent body)
46 Upper layer absorber (stacked fiber absorber)
DESCRIPTION OF SYMBOLS 5 Absorbent main body 7 Wing part 8 Back flap part 9 Back adhesion part 10 Side sheet 11 1st joint line 12 2nd joint line 51 Vertical groove (outward groove)
52A, 52B Discontinuity part 53 Vertical groove dividing area 61 Inner groove A Front part B Excretion part opposing part C Rear part CS Rear part specific area X Vertical direction Y Horizontal direction

Claims (5)

A liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body, facing the excretory part of the wearer when worn It has an absorptive main body which has an excretion part facing part arranged and a back part arranged on a wearer's back side from the excretion part facing part, and is perpendicular to the longitudinal direction corresponding to the wearer's front and back direction An absorbent article having a transverse direction,
A pair of rear flaps extending laterally outward from both side portions along the longitudinal direction of the rear portion of the absorbent main body, and the rear flaps on the non-skin facing surfaces of each of the pair of rear flap portions A vertically long adhesive part is formed to fix the part to the clothing,
On the skin-facing surface of the absorbent main body, a linear groove is formed in which the top sheet and the absorbent body are integrally recessed toward the back sheet side, and the linear groove is formed in the rear portion. A longitudinal groove extending in the longitudinal direction, and an inward groove located laterally inward from the longitudinal groove in the rear portion,
The longitudinal groove has a discontinuity portion that is discontinuous in the longitudinal direction, and the discontinuity portion is sandwiched between two virtual straight lines that extend in the lateral direction through the longitudinal front and rear ends of the back adhesive portion. The absorbent article which exists in a specific area and has the said inward groove | channel in this back part specific area.   The vertical groove has a plurality of the discontinuous portions, all of the plural discontinuous portions exist in the rear portion specific region, and among the discontinuous portions, the discontinuity is located at the forefront in the vertical direction. The absorbent article according to claim 1, wherein the portion exists on a side of the inward groove.   A pair of the longitudinal grooves are formed across a center line that bisects the absorbent main body in the lateral direction, and the pair of longitudinal grooves are divided between the two discontinuous portions adjacent to each other in the longitudinal direction. An area is included in the rear specific area, and the divided area is inclined with respect to the vertical direction so that a longitudinal front end thereof is located laterally inward from a longitudinal rear end in a plan view. 2. The absorbent article according to 2.   The longitudinal length of the rear adhesive portion is 10-30% of the longitudinal length of the rear flap portion, and the longitudinal front end of the rear adhesive portion from the boundary between the excretory portion facing portion and the rear portion The absorbent article as described in any one of Claims 1-3 whose length is up to 60-90 mm.   The absorbent article according to any one of claims 1 to 4, wherein a longitudinal front end of the inward groove is present at or near a boundary between the excretory part facing part and the rear part.

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