JP2008220531A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article which exerts sufficient anti-leakage effects, enhances a fitting property, and prevents generation of uncomfortable feelings while a user wears. <P>SOLUTION: The absorbent article 10 has a pair of anti-leakage walls 14 on both right and left side parts or on both front and back end parts on a skin-opposing face side. The anti-leakage wall 14 is constituted by overlapping a plurality of folded pleats F in a step-like manner and to be in parallel mutually. A folding position P of each of the overlapped folded pleats F gradually shifts outside of the absorbent article 10 toward the upper side folded pleat F from the lower side folded pleat F. The folded pleats F are mutually bonded by a join line 15 formed to have a shape convexly bent outside of the absorbent article 10 and to cross each folded pleat F. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, and incontinence pads.

  A sanitary napkin with a leak-proof wall formed with folds on both the left and right sides of the skin facing surface side is known. For example, Patent Document 1 proposes a sanitary napkin having a leakage barrier made of a single sheet of a substantially hydrophobic material that is folded many times to form a pleated cuff. By adopting the leak barrier having such a structure, this sanitary napkin is described in the same document as preventing side leakage.

  Patent Document 2 describes a sanitary napkin that includes an elastic stretchable side flap that is adjacent to the opposite side edge of the absorbent core and extends along the side edge. The side flap has a first base edge and a first free edge, and an upper surface located on the skin side of the wearer and a lower surface located on the opposite side. The side flap includes a plurality of pleats which are spaced apart from each other between the first base edge and the first free edge on the upper surface and extend in the length direction of the side flap. Each pleat has a second base edge shared on the basis of the upper surface, and a second free edge that tends to rise toward the wearer's skin. In this document, side flaps having a plurality of pleats are elastically contacted with the wearer's skin in a plurality of lines, so that leakage of excrement is prevented, and the skin of the wearer is compared with side flaps that are in surface contact It is described that it causes little rash.

JP-A-8-336556 Japanese Patent Laid-Open No. 11-104173

  However, in the napkin described in Patent Document 1, the folds in the leakage barrier are opened to stand and become a barrier against side leakage, and the leakage barrier stands straight upward. The fit is not good. Further, since the folded folds are joined in a state of being overlapped with each other in the same width, the folded state is maintained, so that the number of overlapping sheets at the joining portion increases. As a result, the joint tends to become hard, and the hardness causes a sense of incongruity during the wearing of the napkin.

  In the napkin described in Patent Document 2, when the liquid reaches the pleats provided on the upper surface of the napkin when the pleats fall down due to the wearer's body pressure, the liquid contacts the wearer's skin. This gives the wearer an unpleasant wet feeling. In addition, since it is necessary to dispose an elastic member on the free edge of each pleat, the manufacturing process becomes complicated and the number of parts increases, which is not economical.

  Therefore, the objective of this invention is providing the absorbent article which can eliminate the fault which the prior art mentioned above has.

  The present invention has a pair of leak-proof walls on the left and right side portions or both front and rear end portions on the skin facing surface side, and the leak-proof walls are formed in a plurality of folded folds and stacked in parallel with each other. Each of the folded folds is an absorbent article, and the folding position of the folded folds is gradually shifted to the outer side of the absorbent article as it goes to the upper folds. The present invention provides an absorbent article that has a convex curved shape toward the outside of the absorbent article and is joined by a joining line formed so as to straddle each fold.

  Further, the present invention has a pair of leak-proof walls on the left and right sides or both front and rear ends on the skin facing surface side, and the leak-proof walls face a single sheet in a mountain shape from the bottom side to the top side. Thus, it is possible to provide an absorbent article that is formed by overlapping a plurality of folds by folding the mountain folds and the valley folds alternately.

  According to the absorbent article of the present invention, the leak-proof wall is folded in a staircase pattern, and there is little overlap between the upper and lower folding folds, so that the leak-proof wall is hard to become hard. In addition, since the folds of the leak-proof wall are narrower as the width is higher, the leak-proof wall is difficult to be hardened even if the fold folds are superimposed directly above. As a result, it is possible to improve the fit while exhibiting a sufficient leakage prevention effect, and to prevent the occurrence of a sense of incongruity during wearing.

  The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 (a) shows a perspective view of a sanitary napkin as a first embodiment of the absorbent article of the present invention. The napkin 10 has a vertically long shape having left and right side edges 10a, 10a extending in the longitudinal direction in plan view and front and rear end edges 10b, 10b extending in the width direction. The napkin 10 includes a top sheet 11 located on the skin facing surface side, a back sheet (not shown) located on the underwear facing surface side, and an absorbent core (not shown) interposed between the two sheets. The absorption core has a vertically long shape in plan view. The top sheet 11 and the back sheet respectively extend outward from the front and rear end edges and the left and right side edges of the absorbent core, and the extending portions are joined to each other. In particular, in the central region in the longitudinal direction of the napkin 10, the top sheet 11 and the back sheet that extend from the left and right side edges of the absorbent core form a pair of wing portions 12,12.

  As the top sheet 11 and the back sheet 12, materials similar to those conventionally used in the technical field can be used without particular limitation. As the surface sheet 11, a liquid permeable sheet, for example, various nonwoven fabrics such as an air-through nonwoven fabric, or a material in which a number of apertures are formed by perforating a thermoplastic resin film can be used. As the back sheet, a liquid-impermeable or water-repellent material, for example, a film made of a thermoplastic resin or a laminate of a nonwoven fabric can be used. A spunbond-meltblown-spunbond (SMS) nonwoven fabric or a spunbond-meltblown-meltblown-spunbond (SMMS) nonwoven fabric can also be used. The back sheet 12 may have moisture permeability. Examples of the back sheet having moisture permeability include a porous film obtained by extruding a resin composition containing a thermoplastic resin and fine particles incompatible with the thermoplastic resin into a film shape and uniaxially or biaxially stretching, and the above-described SMS nonwoven fabric. It is done.

  As the constituent material of the absorbent core, the same materials as those conventionally used in the technical field can be used without particular limitation. For example, an absorbent sheet obtained by sandwiching and fixing a superabsorbent polymer particle between two absorbent papers made of tissue paper or the like, which is a mixture of flap pulp and superabsorbent polymer particles. Can be used.

  As shown in FIG. 1 (a), a vertically long closed leak-proof groove 13 having two pairs of constricted portions is formed on the skin facing surface side of the napkin 10. The leak-proof groove 13 is formed in the central area in the longitudinal direction of the napkin 10. This region faces the wearer's excretion site when the napkin 10 is used. The leak-proof groove 13 is formed by joining and compacting the topsheet 11 and the absorbent core by pressing with or without heat. By making the thickness of the region surrounded by the leak-proof groove 13 larger than the thickness of the region outside the leak-proof groove 13, it is possible to further improve the fit of the wearer to the excretion site.

  On the skin facing surface side of the napkin 10, a pair of leak-proof walls 14 are provided on both left and right side portions thereof. The leak-proof wall 14 extends in the longitudinal direction over the entire length of the napkin 10. The leak-proof wall 14 stands up from the skin facing surface of the napkin 10 when the napkin 10 is worn, and serves as a barrier for preventing side leakage. The leak-proof wall 14 is formed by superimposing and bonding liquid-impermeable or water-repellent sheets on the top sheet 11 on both the left and right sides of the napkin 10. As this sheet | seat, various nonwoven fabrics, such as a spun bond nonwoven fabric and an air through nonwoven fabric, can be used, for example.

  FIG. 1B shows an enlarged view of the main part of the leak-proof wall 14. FIG.1 (b) is an enlarged view of the circled part in Fig.1 (a). The leak-proof wall 14 is formed by folding one sheet so that the mountain fold portions P and the valley fold portions V are alternately formed. As a result, a plurality of folds F are formed on the sheet. Each fold F extends in the longitudinal direction of the napkin 10. The folding amount of each fold fold F is the same. The folds F are stacked in the vertical direction (that is, the thickness direction of the napkin 10). The folds F are stacked stepwise and parallel to each other. That the folds F are parallel to each other means that the folding position of the folds F, that is, the folds F are formed by folding the sheet so that the mountain folds P are parallel to each other. The number of folding folds F is the same in the left and right leak-proof walls 14. The number of the fold folds F may be appropriately set according to the size of the napkin 10 and a specific application (for example, for nighttime or daytime). In general, if the number of folds F is 2 to 5, sufficient side leakage prevention effect can be obtained.

The folding folds F stacked in a staircase shape are gradually displaced toward the outer side in the width direction of the napkin 10 as the folding position, that is, the mountain fold portion P is the lower fold, as it goes to the upper fold. ing. That is, each fold F is inward with respect to the vertical center line (not shown) of the napkin 10. As a result, the folding position of the folding fold F located at the lowest level is closest to the vertical center line of the napkin 10, and conversely, the folding position of the folding fold F positioned at the top level is the vertical center line of the napkin 10. Farthest from. In addition, in FIG.1 (b), although the bending position in each folding fold was all shifted | deviated, a bending position is not restricted to this. For example, as shown in FIG. 2, than the bending position in pleated F _B located at the bottom, towards the folded position in the pleated F _T located at the top is, if the outer side of the napkin 10 The folding position of the folding folds F located between them may be the same position.

  Each fold fold F is inward with respect to the vertical center line (not shown) of the napkin 10, so that when the napkin 10 is worn, each fold fold F is shown in FIG. Stand up to open outward in the width direction. As a result, the liquid receiving surface can be secured widely, and the entire area of the absorbent core can be used effectively. Therefore, it is difficult for liquid leakage to occur. Furthermore, since the folds F are inward, a pocket T for trapping the liquid that has passed over the leak-proof wall 14 is easily formed between the folds F that stand up in the wearing state of the napkin 10. Become. This also makes it difficult for liquid leakage (especially side leakage) to occur. In particular, in the present embodiment, when the napkin 10 is worn, the leak-proof wall 14 does not contact only the folding position of the fold fold F linearly with the wearer's skin, but the entire fold fold F is a surface. Since it abuts on the shape, the leakage prevention effect is enhanced. Moreover, since an elastic member such as a rubber thread is not disposed at the folding position of the fold fold F, the uncomfortable wearing caused by the elastic member does not occur.

  As shown in FIG. 1 (a), in the leak-proof portion 14, the folds F are formed so as to have a convex curved shape outward in the width direction of the napkin 10 and straddle the folds F. Bonded by the bonded line 15. The joining line 15 is formed in the central area in the longitudinal direction of the napkin 10. By joining each fold fold F by the joining line 15, the standing property of each fold fold F becomes good in the wearing state of the napkin 10. Further, since the joining line 15 has a curved shape that protrudes outward in the width direction of the napkin 10, in the standing state of the fold fold F, the fold fold F positioned outward in the width direction has a longer longitudinal direction. Since length becomes short, the fitting property in the wearing condition of the napkin 10 becomes favorable. Furthermore, the fold fold F located on the lower side is likely to stand up, and the fold fold F located on the upper side is less likely to occur. On the other hand, even when the joining line is formed so as to straddle each fold fold F, when the shape of the joining line is a convex curved shape toward the inner side in the width direction of the napkin 10 Further, the fold fold F does not have good standing. In particular, the fold fold F positioned on the lower side is difficult to stand up, and the fold fold F positioned on the upper side is more likely to bump.

  As described above, in the napkin 10 of the present embodiment, unlike the technique described in Patent Document 2 described above, an elastic member such as rubber thread is provided at the folding position of the fold F, that is, at the mountain fold portion P of the sheet. The folded pleats F stand up easily without being arranged in an extended state. However, if an elastic member such as a rubber thread is provided in an expanded state at the folding position of the fold fold F, the fold fold F can be further raised.

  In particular, the side edge of the free end side of the two side parts of the sheet constituting the leak-proof part 14 extends beyond the side edge of the absorbent core (not shown) to the outside in the width direction of the napkin 10. By extending and joining the extended portion to the wing portion 12 described above, the fold fold F is further improved in standing. The reason is that when attaching the napkin 10 to the shorts (not shown), the wing part is fixed to the outer surface of the crotch part of the 12 shorts, so that the leak barrier 14 integrated with the wing part 12 is This is because a pulling force acts outward in the width direction of the napkin 10.

  The bonding line 15 shown in FIG. 1A can be formed by, for example, heat-sealing a sheet in which a plurality of folds F are formed or applying an adhesive. Note that the joining line 15 shown in the figure has a curved top and its vicinity extending beyond the fold fold F to the outside in the width direction of the napkin 10, but the joining line is folded instead. You may form this joining line so that it may be located only in the site | part in which the pleat was formed.

  As shown in FIG. 4A, when attention is paid to one of the fold folds F, the one fold fold F partially overlaps with the fold fold F positioned one step above or one step below. Further, the sheet constituting the leak-proof wall 14 is folded. Accordingly, the number of overlapping sheets increases between the upper and lower folds. Thereby, the cushioning property of the leak-proof wall 14 becomes good. However, if the overlapping of sheets increases, it is necessary to strengthen the joining between the folds by the joining line 15 described above, so that the joining line 15 is formed hard, which causes a sense of incongruity during wearing. There is a case. In such a case, as shown in FIGS. 4B and 4C, when attention is paid to one of the folds F, the one fold F is one step above or one step below. The sheet constituting the leak-proof wall 14 may be folded so as not to overlap with the fold folds that are positioned. By forming the fold fold F by the folding method shown in FIGS. 4B and 4C, the overlapping of the sheets becomes three sheets. Therefore, it becomes possible to make the conditions at the time of joining the folds F by the joining line 15 weaker than the case shown in FIG.

  As described above, in this embodiment, the folding amount of each fold fold F is the same. The folding amount W of the fold fold F (see FIG. 4A) depends on the size of the napkin 10 and its specific application, but is preferably 5 to 20 mm, particularly preferably 10 to 15 mm.

  Instead of setting the folding amount of each folding fold F to be the same, the folding amount of each folding fold can also be changed. For example, as shown in FIGS. 5A and 5B, when attention is paid to one of the fold folds F, the fold amount W1 of the one fold fold F is equal to that of the fold folds located one step above. The sheet | seat which comprises the leak-proof wall 14 can be folded so that it may become smaller than the folding amount W2. By forming the fold folds F in this way, the pockets formed on the upper surface of the folds F can be enlarged, so that it is possible to improve the effect of preventing leakage of liquid flowing along the body surface (skin), which is preferable. . Of the leakage barriers 14 shown in FIGS. 5A and 5B, the leakage prevention wall 14 shown in FIG. 5A has a folding fold F positioned one step above or one step below. The pleats F are partially overlapped. The leak-proof wall 14 shown in FIG. 5B has a configuration in which one fold fold F does not overlap with a fold fold located one step above or one step below.

  Instead of the leak-proof wall 14 shown in FIGS. 5A and 5B, the leak-proof wall 14 shown in FIGS. 6B and 6B may be employed. The leak-proof wall 14 shown in FIGS. 6B and 6B is obtained by changing the folding amount of each fold fold similarly to the leak-proof wall 14 shown in FIGS. 5A and 5B. However, the method of changing the amount of folding is different from the leak-proof wall 14 shown in FIGS. 5 (a) and 5 (b). Specifically, when attention is paid to one of the fold folds F, the folding amount W1 of the one fold fold F is larger than the folding amount W2 of the fold fold located on the upper level. The sheet | seat which comprises the leak-proof wall 14 is folded. It is preferable that the folding amount W2 is large because the folds F can be easily raised, the fit with the body can be improved, and the side leakage prevention property can be improved. Of the leakage barriers 14 shown in FIGS. 6A and 6B, the leakage barrier 14 shown in FIG. 6A has a folding fold F positioned one step above or one step below. The pleats F are partially overlapped. The leak-proof wall 14 shown in FIG. 6B has a configuration in which one fold fold F does not overlap with a fold fold located one step above or one step below.

  In the present embodiment, the leak-proof wall 14 is configured by folding a single sheet so that a plurality of folds F are formed. Instead, as shown in FIG. The leak-proof wall 14 can also be comprised using. Specifically, a strip-shaped sheet is folded in two vertically to form a folded piece 14a, and the plurality of folded pieces 14 are stepped and mutually connected so that their folding lines extend in the same direction. The leak-proof wall 14 in which the folded folds F similar to the leak-proof wall 14 having the structure shown in FIG. 1B are formed by joining the bent pieces 14 adjacent to each other at the joint portion 14b in an overlapping manner. Can be formed. The joint portion 14b is formed by, for example, heat fusion or adhesion using an adhesive. The joint portion 14b is formed in a linear shape over the entire length of the bent piece 14 in the longitudinal direction. As a result, the liquid trapped in the pocket T (see FIG. 3) is prevented from leaking. According to the embodiment shown in FIG. 7, since the material of the sheet constituting each bent piece 14 can be individually selected, various functions are imparted to the leak-proof wall 14 according to the specific use of the napkin 10. It becomes easy. For example, by using a highly cushioning sheet as a part of the bent piece 14, it is possible to impart a high cushioning property to the leak-proof wall 14.

  In addition, as a structure of the leak-proof wall 14 of embodiment shown in FIG. 7, the structure shown to FIG.4 (b) and (c), FIG.5 (a) and (b) and FIG.6 (a) and (b), for example. It is also possible to adopt the structure shown in FIG.

  FIG. 8 shows a napkin 10 according to another embodiment of the present invention. The napkin 10 of this embodiment has a pair of leak-proof walls 14 at both front and rear ends of the skin facing surface. The leak-proof wall 14 extends in the width direction over the entire width of the napkin 10. The leak-proof wall 14 stands up from the skin-facing surface of the napkin 10 when the napkin 10 is worn, and serves as a barrier for preventing leakage from the front and rear. The leak-proof wall 14 is formed by folding a single sheet so that a mountain fold portion and a valley fold portion are alternately formed, thereby forming a plurality of folds. Each fold F extends in the width direction of the napkin 10. The folding amount of each fold is the same.

  The folds F are stacked stepwise and parallel to each other. Since the folding positions of the folds stacked in a staircase pattern are lower folds, they gradually shift to the outer side in the longitudinal direction of the napkin 10 as they move toward the upper folds. That is, each fold is inward with respect to the horizontal center line (not shown) of the napkin 10. The fold folds F are joined by a joining line 15 having a convex curved shape outward in the longitudinal direction of the napkin 10 and formed so as to straddle each fold fold. The curved shape of the joining line 15 is substantially similar to the curved shape of the front and rear end edges 10 b of the napkin 10. The joining line 15 is formed on or near the front and rear edges of the absorbent core (not shown).

  According to the napkin 10 of the present embodiment having the above configuration, each fold is joined by the joining line 15, so that the fold folds can be raised. Further, in the standing state of the fold folds, the fold fold F located outward in the longitudinal direction has a shorter length in the width direction, so that the fit in the wearing state of the napkin 10 is improved. Due to these reasons, the napkin 10 according to the present embodiment is excellent in prevention of liquid leakage from the front and rear and fit. In addition, regarding the napkin 10 of the present embodiment, the description described above regarding the embodiment shown in FIGS.

  FIG. 9 shows a napkin 10 according to still another embodiment of the present invention. The napkin 10 has a pair of leak-proof walls 14 on the left and right sides. The leak-proof wall 14 extends in the longitudinal direction over the entire length of the napkin 10. As shown in FIG. 10, the leak-proof wall 14 folds a single sheet S having a mountain shape so that mountain fold portions P and valley fold portions V are alternately formed from the bottom side toward the top side. It is formed by that. By this folding, a plurality of folding folds F are formed so as to overlap each other in the vertical direction. The folds F are stacked stepwise and parallel to each other. The shape of the chevron sheet S is not limited to the triangle shown in FIG. 10, and may be other shapes such as a trapezoidal shape, a semicircular shape, and a semielliptical shape.

  The folding folds F stacked in a staircase shape are gradually shifted to the outer side in the width direction of the napkin 10 as the folding position, that is, the mountain fold portion P is the lower fold, as it goes to the upper fold. ing. That is, each fold F is inward with respect to the vertical center line (not shown) of the napkin 10. In FIGS. 9 and 10, the folding position of each fold is shifted, but the folding position is not limited to this. For example, as shown in FIG. 11, the mountain-shaped sheet S may be folded so that the positions of the mountain folds P and the valley folds V in each fold fold F are the same.

  By folding the chevron sheet S to form a plurality of fold folds F, the longer the fold fold F is located, the shorter the length in the longitudinal direction. In other words, the leakproof wall 14 has a greater amount of overlap of the chevron sheets S toward the central region in the longitudinal direction, and conversely, the overlap of the chevron sheets S decreases toward the end in the longitudinal direction. As a result, the leak-proof wall 14 has the thickest central region in the longitudinal direction, and the thickness decreases from the central region toward the front and rear ends. Therefore, when the napkin 10 is worn, the leak-proof wall 14 is formed with the largest number of folds F and a pocket portion (not shown) located in the middle in the longitudinal direction, which is a portion corresponding to the excretion portion of the wearer. Then, the number of folds F and the number of pockets decrease from the central area toward the front and rear ends. When the leak-proof wall 14 has such a structure, the fitting property in the wearing state of the napkin 10 becomes good, and side leakage is effectively prevented.

  In order to maintain the folded shape of the chevron sheet S and to stabilize the folds F, joints (not shown) can be formed along the two ridge lines in the chevron sheet S. Alternatively, as shown in FIG. 9, the fold folds are joined by the joining line 15 so as to have a convex curved shape outward in the width direction of the napkin 10 and straddle the fold fold F. May be. The joining line 15 is formed in the central area in the longitudinal direction of the napkin 10. The effect of forming the joining line 15 is the same as that of the above-described embodiment. In addition, regarding the napkin 10 of the present embodiment, the description described above regarding the embodiment shown in FIGS.

  The embodiment shown in FIG. 11 is a modification of the embodiment shown in FIG. In the embodiment shown in FIG. 11, a trapezoidal sheet is used as the mountain-shaped sheet S. The trapezoidal sheet is not folded in its entirety from the lower side to the upper side, but in the vicinity of the upper side, the upper side exceeds the side edge of the absorbent core (not shown) and the napkin 10 It is bent so as to be located on the outer side in the width direction, whereby a substantially trapezoidal side extending portion 16 extending outward in the width direction of the napkin 10 is formed. The laterally extending portion 16 is used as a wing portion extending from the left and right side edges of the napkin 10. That is, the wing portion is configured to include at least the top region of the mountain-shaped sheet S. In this case, the wing portion may be formed only by the lateral extension portion 16. Alternatively, the side extending portion 16 may be bonded to the top sheet 11 and / or the back sheet (not shown) to form a wing portion. According to this embodiment, when attaching the napkin 10 to the shorts, the width of the napkin 10 with respect to the leak-proof wall 14 integrated with the wing portion is secured to the outer surface of the crotch part of the shorts. Since a pulling force acts outward in the direction, there is an advantage that the fold fold F constituting the leak-proof wall 14 becomes easier to stand up.

  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 above embodiment is an example in which the present invention is applied to a sanitary napkin, but the present invention is applied to absorbent articles other than a napkin, such as an auxiliary pad (urine collection pad) used in combination with an incontinence pad or a diaper, and a panty liner. Can be applied similarly.

Fig.1 (a) is a perspective view which shows the sanitary napkin as one Embodiment of the absorbent article of this invention, FIG.1 (b) is a principal part enlarged view of the leak-proof wall in Fig.1 (a). It is. FIG. 2 is an enlarged view of a main part showing another embodiment of the leak-proof wall. FIG. 3 is a longitudinal cross-sectional view in the width direction of the central region in the longitudinal direction when the napkin shown in FIG. 4 (a) to 4 (c) are enlarged views of a main part showing another embodiment of the leak-proof wall. 5 (a) and 5 (b) are enlarged views of a main part showing another embodiment of the leak-proof wall. 6 (a) and 6 (b) are enlarged views of a main part showing another embodiment of the leak-proof wall. FIG. 7 is an enlarged view of a main part showing another embodiment of the leak-proof wall. FIG. 8 is a perspective view (corresponding to FIG. 1 (a)) showing a sanitary napkin as another embodiment of the absorbent article of the present invention. FIG. 9 is a perspective view (corresponding to FIG. 1 (a)) showing a sanitary napkin as another embodiment of the absorbent article of the present invention. FIG. 10 is a diagram showing a procedure for producing a leak-proof liquid by folding a chevron sheet. FIG. 11 is an enlarged view of a main part showing another embodiment of the leak-proof wall. FIG. 12 is a perspective view (corresponding to FIG. 1 (a)) showing a sanitary napkin as another embodiment of the absorbent article of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sanitary napkin 11 Top sheet 12 Wing part 13 Leak-proof groove 14 Leak-proof wall 15 Joining line F Fold fold P Mountain fold part V Valley fold part T Pocket part

Claims (11)

  The absorbent article has a pair of leak-proof walls on the left and right sides or both front and rear ends on the skin facing surface side, and the leak-proof walls are formed of a plurality of folded folds and stacked in parallel with each other. Since each folded fold is located on the lower fold, the folded folds are gradually shifted to the outer side of the absorbent article toward the upper fold, and the folds are absorbed. An absorbent article having a convex curved shape toward the outside of the absorbent article and joined by a joining line formed so as to straddle each fold.   The absorbent article according to claim 1, wherein the leak-proof wall is formed by folding a single sheet so that a mountain fold portion and a valley fold portion are alternately formed.   The absorbent article according to claim 2, wherein the sheet is folded so as to partially overlap a fold that is one fold but is located one step above or one step below.   The absorbent article according to claim 2, wherein the sheet is folded so as not to overlap with a folded fold located one step above or one step below.   The absorbent article according to any one of claims 2 to 4, wherein the sheet is folded so that a folding amount of one folding fold is smaller than a folding amount of a folding fold located one step above.   The absorbent article according to any one of claims 2 to 4, wherein the sheet is folded so that a folding amount of one folding fold is larger than a folding amount of a folding fold located one step above.   2. The absorbent article according to claim 1, wherein the leak-proof wall is formed by stacking and joining a plurality of folded pieces formed by folding one strip-shaped sheet in two.   It has a pair of leak-proof walls on the left and right sides or both front and rear ends on the skin-facing surface side, and the leak-proof walls are formed of a single ridge-shaped sheet from the bottom side to the top side, An absorptive article that is configured by overlapping a plurality of folds by folding so that valley folds are alternately formed.   The absorbent article according to claim 8, wherein the folded folds are shifted downwardly toward the outer side of the absorbent article as the folding position of the folded folds is toward the upper fold. .   The absorbent article according to claim 8 or 9, wherein the folded folds have a curved shape convex toward the outside of the absorbent article and are joined by a joining line formed so as to straddle each folded fold. .   11. The wing portion according to claim 8, further comprising a pair of wing portions extending laterally from the left and right side edges, wherein the wing portion includes a top region of the chevron-shaped sheet. Absorbent article.

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