TW202023503A - Absorbent article - Google Patents

Abstract

In the present invention, a standing section (51) of a leakproof cuff (5) is configured to include an inward extension section (52) that extends inward in a lateral direction (Y) from a base end (50) and that is stretchable in a longitudinal direction (X). A standing inhibition part (55) at which the inward extension section (52) is fixed to a surface sheet (2) is formed each in a front section (F) and a rear section (R). When worn, the standing section (51), which is positioned between the standing inhibition parts (55, 55) at both ends in the longitudinal direction (X) of the leakproof cuff (5), stands up with an end (52a), which is a free end, of the inward extension section (52) being oriented toward the skin side of a wearer, and in this standing state, the free end is positioned more inward in the lateral direction (Y) than the base end (50). An absorbent body (4) has a rear slit region (RS) in the rear section (R), and the standing inhibition part (55) in the rear section (R) is positioned more toward the rear in the longitudinal direction than the longitudinal direction rear end of said region (RS).

Description

Absorbent articles

The present invention relates to an absorbent article with leak-proof cuffs standing up toward the wearer's skin side.

Menstrual sanitary napkins and other absorbent articles are worn on the wearer's crotch while contacting the wearer's crotch. Therefore, it is more ideal to deform in a way that follows the wearer's body shape and adhere well to the wearer's skin so as not to The wearer has discomfort or discomfort. In addition, among the absorbent articles, there are absorbent articles designed to be relatively long in the longitudinal direction along the front and back directions of the wearer. Such night-use absorbent articles usually have flaps on the rear side of the wearer's back in order to prevent leakage of excrement such as menstrual blood.

In Patent Document 1, there is described a menstrual napkin for nights when side leakage prevention members, also called leak prevention cuffs, three-dimensional folds, etc. are provided. In the menstrual sanitary napkin described in Patent Document 1, a pair of leak-proof cuffs are arranged on both sides along the longitudinal direction of the absorbent body, and are provided with side sheets extending across the full length of the absorbent body, and An elastic member fixed to the lateral inner edge of the side sheet in an extended state. In addition, the lateral inner edges of the respective longitudinal front and rear ends of the side sheet are fixed to the front sheet to form a fixed part. When the sanitary napkin is worn, the part of the side sheet sandwiched between the fixed parts is passed through the above For contraction of the elastic member, the above-mentioned lateral inner edge portion is used as a free end, and the free end rises toward the wearer's skin side. Furthermore, the aforementioned longitudinal direction corresponds to the direction of the wearer's front and back, and the aforementioned transverse direction corresponds to the direction perpendicular to the longitudinal direction. Patent Document 2 describes a menstrual sanitary napkin having a leak-proof cuff with the same configuration as the above.

Furthermore, in order to make the absorbent article adhere to the wearer's skin well, etc., it is known that there is a technique for forming slits or openings in an absorbent body having a particularly high rigidity among constituent members of the absorbent article. For example, in Patent Document 3, it is described that, in a menstrual sanitary napkin having a flap part at the rear part, the part of the absorbent body located at the rear part and the excretion part located more longitudinally forward than the rear part are paired The part of the directional part is provided with a slit area provided with a plurality of slits extending in the longitudinal direction. Prior art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2013-85829 Patent Document 2: Japanese Patent Laid-Open No. 2016-67957 Patent Document 3: Japanese Patent Laid-Open No. 2018-50951

The present invention is an absorbent article, which has a longitudinal direction corresponding to the front and back directions of the wearer and a transverse direction orthogonal to the longitudinal direction, and has a middle part including an excretion part facing part that faces the excretion part of the wearer when worn Part, a front part extending from the middle part to the longitudinal front, and a rear part extending from the middle part to the longitudinal rear, and having an absorbent body and one of both sides along the longitudinal direction arranged on the absorbent body For leak-proof cuffs, the absorbent body is provided with an absorbent body containing a water-absorbing material, a front sheet arranged on the skin facing side of the absorbent body, and a back face arranged on the non-skin facing side of the absorbent body Sheet. A pair of the above-mentioned leak-proof cuffs are each composed of a sheet for leak-proof cuffs, the sheet for leak-proof cuffs is fixed to the base end of other member, and the sheet for leak-proof cuffs is directed to the wearer side The upright department. The said standing part is comprised by including the inner side extension part which extends in the lateral direction from the said base end part and is stretchable in a longitudinal direction. In the said front part and the said rear part, the stand-up hindering part which fixes the said inner side extended part to the said surface sheet is respectively formed. When wearing, the upright part of the upright hindering part sandwiched between the two longitudinal ends of the leak-proof cuff has the edge of the inner extension part as a free end, and the free end faces the wearer's skin side Standing up, in the standing state, the free end is located on the laterally inner side of the base end. The said absorber has the rear slit area arrange|positioned at the said rear part with the rear slit extended in a longitudinal direction. The erection hindering portion of the rear portion is located more longitudinally rearward than the longitudinal rear end of the rear slit region.

As a unique problem when using a menstrual tampon when falling asleep, there is the following problem: when the wearer falls asleep, menstrual blood and other body fluids move along the wearer’s body to the back of the tampon, and leak out from both sides of the back. external. To solve this problem, it is effective to: 1) make the whole sanitary napkin adhere well to the wearer’s crotch to improve conformability; and 2) set a leak-proof flap across the front and rear of the sanitary napkin side.

However, the actual situation is that the menstrual period sanitary napkins for night use have a longer longitudinal length corresponding to the front and back directions of the wearer, so compared to the daily menstrual sanitary napkins with a relatively short longitudinal length, the entire sanitary napkin is It is technically difficult for wearers with complicated surface shapes to closely follow the crotch to improve conformability, and therefore, the technology corresponding to the above 1) has not been provided. In addition, regarding the above 2), even if the menstrual napkins used at night based on the prior art are equipped with leak-proof cuffs, especially at the rear part, the leak-proof cuffs are not fully erected, so that they are attached to the wearer’s buttocks. There is room for improvement in terms of performance and liquid leakage resistance.

The present invention relates to an absorbent article with excellent conformability to the crotch of the wearer and excellent liquid leakage resistance.

Hereinafter, referring to the drawings, the absorbent article of the present invention will be described based on its preferred embodiment. In Figs. 1 to 6, there is shown a menstrual sanitary napkin 1 as an embodiment of the absorbent article of the present invention. As shown in Figures 1 and 2, the sanitary napkin 1 corresponds to the wearer’s front and rear directions with a longitudinal X extending from the wearer’s abdominal side to the back through the crotch and a transverse Y orthogonal to the longitudinal X, and has Including the middle part M of the part facing the excretory part (vaginal opening, etc.) of the wearer during wearing, that is, the middle part M of the opposite part of the excretion part, which is arranged more forward than the middle part M in the longitudinal direction X, that is, the wearer's front side Side) The front part F and the rear part R of the wearer's back (back side), which is arranged behind the middle part M in the longitudinal direction X. The above-mentioned drain portion facing portion of the middle portion M is located at the center portion of the middle portion M in the transverse direction Y.

The sanitary napkin 1 is mainly used as a menstrual napkin suitable for night sleep. Menstrual sanitary napkins for night use are worn for a long time, so the amount of menstrual blood and other excretion fluids that are excreted during wearing also increases, and it needs to absorb and maintain a large amount of fluid with high absorption and retention. In order to cope with this situation, the sanitary napkin 1 preferably has a certain size. Specifically, the total length of the longitudinal direction X is preferably 27 cm or more, more preferably 30 cm or more.

As shown in Figure 1, the sanitary napkin 1 is bounded by a central fold line CFL formed by the folding in the longitudinal direction X, and is divided into a first area in front of the longitudinal direction X and a second area in the rear. The area includes the middle portion M and the front portion F, and the second area includes the rear portion R. That is, the central fold line CFL forms the boundary between the middle part M and the rear part R. The central fold line CFL is formed by folding the sanitary napkin 1 in the longitudinal direction X with the front sheet 2 forming the skin facing surface as the inner side (the back sheet 3 forming the non-skin facing surface as the outer side). A straight line extending in the transverse direction Y. The central fold line CFL only needs to be formed at the center of the longitudinal direction X of the sanitary napkin 1. Specifically, the center of the longitudinal direction X of the sanitary napkin 1 is used as a reference, and the front and rear sides of the longitudinal direction X are respectively in the longitudinal direction from the reference sanitary napkin 1 The area within 10% of the full length of X.

Moreover, as shown in FIG. 1, in the rear part R of the sanitary napkin 1, at the rear of the longitudinal direction X than the rear slit region RS (RSr, RS1) described below, a strip formed by folding the sanitary napkin 1 is formed Fold the line RFL afterwards. The rear fold line RFL is also the same as the central fold line CFL. It is formed by folding the sanitary napkin 1 in the longitudinal direction X with the front sheet 2 forming the skin facing surface as the inner side, and is formed in a straight line extending in the lateral direction Y. The rear fold line RFL extends in the transverse direction Y between the rear slit region RS and the transverse groove 9 of the rear portion R (between the inner groove 13 and the transverse groove 9). The rear fold line RFL is usually formed at a position where the front side of the longitudinal direction X and the rear end of the longitudinal direction X of the sanitary napkin 1 are separated by 10-30% of the full length of the longitudinal direction X of the sanitary napkin 1.

Moreover, as shown in FIG. 1, in the front part F of the sanitary napkin 1, a front fold line FFL formed by the folding of the sanitary napkin 1 is formed. The front fold line FFL is also the same as the central fold line CFL and the rear fold line RFL. It is formed by folding the sanitary napkin 1 in the longitudinal direction X as the inner side with the front sheet 2 forming the skin facing surface, and is formed in the transverse direction Y Straight extension. The front fold line FFL extends in the lateral direction Y between the central slit area MS described below and the lateral groove 9 of the front portion F. The front fold line FFL is usually formed at a position separated from the front end of the longitudinal X of the sanitary napkin 1 by 10-30% of the full length of the longitudinal X of the sanitary napkin 1 on the rear side of the longitudinal X.

In this way, the sanitary napkin 1 has three fold lines in sequence from the front side of the longitudinal direction X: front fold line FFL, central fold line CFL, and rear fold line RFL. These fold lines are used to fold the sanitary napkin 1 in the longitudinal direction X And used in single packaging. That is, the single packaging form of the sanitary napkin 1 is a four-fold form formed by three folding lines.

As shown in FIG. 1, the sanitary napkin 1 includes an absorbent body 10 that is long in the longitudinal direction X, and both sides along the longitudinal direction X of the middle part M of the absorbent body 10 are directed to the outer side of the transverse direction Y. A pair of extended wings 10W, 10W. The absorbent body 10 extends from the front part F to the rear part R. The length direction of the absorbent body 10, that is, the length direction of the sanitary napkin 1 coincides with the longitudinal direction X, and the width direction of the absorbent body 10 and the sanitary napkin 1 orthogonal to the length direction coincides with the transverse direction Y.

The middle part M in the absorbent article of the present invention is the area divided by the central fold line CFL and the front end of the wing when the absorbent article like the sanitary napkin 1 has wings, here is the so-called "front end of the wing" If the sanitary napkin 1 is taken as an example, it is the root of a wing 10W on the front side of the longitudinal direction X. That is, the middle portion M is a continuous area with an imaginary straight line extending in the transverse direction Y passing through the root of the front side of a wing portion 10W as the longitudinal X front end and the central fold line CFL as the longitudinal X rear end. Furthermore, in the sanitary napkin 1, a pair of wings 10W and 10W are symmetrically formed on the basis of a longitudinal center line CL that bisects the sanitary napkin 1 in the transverse direction Y and extends in the longitudinal direction X. The root of the front side and the root of the other wing 10W are present at the same position in the longitudinal direction X.

In addition, the middle part M in an absorbent article (not shown) having no wings is produced when the absorbent article is folded into a single package form in the transverse direction (width direction; Y direction in the figure). The two fold lines transverse to the article refer to the area enclosed by the first fold line and the second fold line counted from the longitudinal front end of the absorbent article. If described in conjunction with FIG. 1, the front fold line FFL corresponds to the so-called first fold line here, and the center fold line CFL corresponds to the so-called second fold line here. That is, in the sanitary napkin 1 shown in FIG. 1, assuming that there is no pair of wings 10W and 10W, the middle part M in the sanitary napkin 1 without wings has the front fold line FFL as the longitudinal direction The front end of X and the central fold line CFL is regarded as a continuous area at the rear end of longitudinal X.

As shown in FIGS. 1 to 5, the absorbent body 10 constituting the sanitary napkin 1 includes a liquid-retaining absorbent body 4 containing a water-absorbing material, a front sheet 2 arranged on the skin-facing side of the absorbent body 4, and The back sheet 3 is arranged on the non-skin facing side of the absorber 4. The absorber 4 is interposed between the front sheet 2 and the back sheet 3. The side edge 2S of the front sheet 2 along the longitudinal direction X represented by the symbol 2S in the figure is the side edge of the absorbent body 10 along the direction, and also the absorbent body 10 and the above-mentioned wings 10W and the following The boundary of each of the rear wing pieces 10H (refer to FIGS. 3 to 5).

In this specification, the "skin facing surface" refers to the surface of the absorbent article or its constituent members (such as the absorbent body 4) that faces the wearer's skin when the absorbent article is worn, that is, opposite to the wearer's skin On the nearer side, the "non-skin facing surface" refers to the surface of the absorbent article or its constituent members that faces the side opposite to the skin side (clothing side) when the absorbent article is worn, that is, compared to the wearer’s skin Far side. Furthermore, the term "wearing" here refers to the state of maintaining the correct wearing position, that is, the correct wearing position of the absorbent article.

As shown in Figs. 3 to 5, the front sheet 2 covers the entire area of the skin-facing surface of the absorber 4, and the back sheet 3 covers the entire area of the non-skin-facing surface of the absorber 4. The back sheet 3 extends further to the outside of the lateral direction Y than the front sheet 2 and forms a side flap sheet portion 10S together with the side sheet 6 described below. The side flap 10S includes a member extending from the side edges 4S and 4S of the absorbent body 4 along the longitudinal direction X to the outside of the transverse direction Y (in this embodiment, the front sheet 2, the back sheet 3, and the side portion The part constituted by the sheet 6) includes the above-mentioned wing portion 10W and the following rear wing piece portion 10H. The back sheet 3 and the side sheet 6 are joined to each other at the extending portions from the both side edges of the absorber 4 along the longitudinal direction X by a known joining method such as adhesive, heat sealing, and ultrasonic sealing. In addition, the front sheet 2 and the back sheet 3 are joined to each other by a well-known joining method at the extension portions from the both ends of the longitudinal direction X of the absorbent body 4. The front sheet 2 and the back sheet 3 and the absorber 4 may be joined by adhesives, respectively. As the top sheet 2 and the back sheet 3, various sheets previously used for absorbent articles such as menstrual sanitary napkins can be used without particular limitation. The top sheet 2 is preferably a liquid-permeable sheet, and specifically, for example, a single-layer or multilayer structure non-woven fabric, an apertured film, etc., produced by various known manufacturing methods can be cited. The back sheet 3 is preferably a liquid-impermeable sheet. Specifically, for example, a resin film, a laminated sheet of a resin film and a non-woven fabric, etc. may be mentioned, and the resin film may be moisture-permeable. Furthermore, regarding the back sheet 3, the so-called liquid impermeability includes the concept of both the property of completely impervious to liquid and the property of allowing only a small amount of liquid (liquid impermeability). The back sheet 3 may have water repellency.

As shown in FIGS. 1 to 3, a pair of wings 10W and 10W are extended on both sides of the middle part M of the absorbent body 10 along the longitudinal direction X. A pair of wing portions 10W and 10W are formed by extending the back sheet 3 and the side sheet 6 of the side wing sheet portion 10S located in the middle portion M to the outer side of the lateral direction Y than the peripheral portion, as shown in FIG. 1 And the figure shown in FIG. 2 has a substantially trapezoidal shape with a bottom bottom (longer side than the top bottom) on the side of the absorbent body 10 in a plan view. On the non-skin facing surface of the wing portion 10W, a wing portion fixing material (not shown) for fixing the wing portion 10W to clothing such as shorts is arranged. The wing portion fixing material is formed by applying an adhesive, and is covered with a release sheet including a film, non-woven fabric, paper, etc. before use. When using the sanitary napkin 1, the wings 10W are folded back to the outer surface side, which is the non-skin facing surface of the crotch of clothing such as shorts, and used.

Moreover, as shown in FIGS. 1, 2, 4, and 5, a pair of rear flap portions 10H, 10H are extended on both sides of the rear part R of the absorbent body 10 along the longitudinal direction X. A pair of rear wing piece parts 10H and 10H are formed by extending the back sheet 3 and the side sheet 6 of the part of the side wing piece 10S located in the rear part R to the outer side of the lateral direction Y than the peripheral part. On the non-skin facing surface of the rear flap portion 10H, a rear flap portion fixing material 11 for fixing the rear flap portion 10H to clothing such as shorts is arranged. The rear flap portion 10H does not fold back when it is fixed to the clothing, but expands on its non-skin facing surface, that is, extends to the side of the absorbent body 10, through the rear flap formed on its non-skin facing surface The sheet fixing material 11 is fixed on the inner surface, which is the skin-facing surface of the clothing. The rear wing sheet portion fixing material 11 is formed by applying an adhesive, and is covered with a release sheet (not shown) containing a film, non-woven fabric, paper, and the like before use.

As shown in FIG. 2, on the non-skin facing surface of the absorbent body 10, a plurality of body fixing materials 12 for fixing the absorbent body 10 to clothing such as shorts are intermittently arranged in the longitudinal direction X. In this embodiment, the main body fixing material 12 has a rectangular shape in plan view, the length direction of which is consistent with the horizontal direction Y, and a plurality of pieces are arranged in the vertical direction X at a certain interval. The main body fixing material 12 is formed by applying an adhesive, and is covered with a release sheet (not shown) including a film, non-woven fabric, paper, and the like before use.

As shown in FIGS. 1 and 3 to 5, a pair of leak-proof cuffs 5, 5 are arranged on both sides of the absorbent body 10 along the longitudinal direction X. A pair of leak-proof cuffs 5 and 5 are each composed of a sheet for leak-proof cuffs, and have a base end 50 where the sheet for leak-proof cuffs are fixed to other members, and the sheet for leak-proof cuffs A standing part 51 standing up to the wearer's side. In the present embodiment, the side sheet 6 is a sheet for leak-proof flanging.

The base end 50 is a part of the raised base end when the raised portion 51 is raised toward the wearer's skin side when the sanitary napkin 1 is worn, and more specifically, is a leak-proof flanging sheet (in this embodiment In the form, it is the part of the fixing part of the side sheet 6) and the "other member" adjacent to the rising part 51 in the lateral direction Y, in other words, the part of the fixing part located at the innermost side of the lateral direction Y. In addition, the "other member" refers to the constituent members of the sanitary napkin 1 other than the leak-proof cuff sheet, and is typically arranged in contact with the sheet on the non-skin facing of the leak-proof cuff sheet The member on the surface side is the top sheet 2 as shown in FIGS. 3 to 5 in this embodiment.

As described above, the base end portion 50 is a fixing portion between the leak-proof flanging sheet and other members, and is typically formed by a known joining method such as hot melt adhesive or thermal welding. In this embodiment, as shown in FIG. 1, the base end 50 is linear in a plan view, and crosses approximately the longitudinal direction X of the leak-proof flanging sheet (in this embodiment, the side sheet 6) The full length extends in the longitudinal direction X, and, as shown in FIGS. 3 to 5, it is located near the side edge 2S of the front sheet 2 along the longitudinal direction X.

The upright portion 51 is a non-fixed portion of the leak-proof flanging sheet with other members. As shown in FIGS. 3 and 4, it includes an inner extension portion 52 extending from the base end portion 50 to the inner side of the lateral direction Y. constitute. In this embodiment, the standing portion 51 includes only the inner extension portion 52.

The inner extension portion 52 of the standing portion 51 is stretchable in the longitudinal direction X. In this embodiment, as shown in FIGS. 3 and 4, the side sheet 6 (leak-proof flanging forming sheet) forming the edge region 520 of the inner extension portion 52 of the standing portion 51 is arranged There is an elastic member 7 having stretchability in the longitudinal direction X. With this configuration, the inner extension portion 52, that is, the rising portion 51, is provided with stretchability in the longitudinal direction X. To explain further, in the present embodiment, the entirety of the leak-proof cuff 5 including the following stand-up hindering portion 55 and the end fixing part 56 includes a side sheet 6 that will be a sheet for leak-proof cuffs. It is formed by folding in two in the transverse direction Y to form a part of a double-layer structure, and the fold of the two-fold fold and its vicinity are the edge area 520. The edge area 520 of the inner extension portion 52 includes the edge portion 52a of the inner extension portion 52 along the longitudinal direction X and the portion near the edge portion 52a, typically toward the base end 50 and away from the edge 52a It is the area within 15 mm. Furthermore, the elastic member 7 is fixed in an extended state between the side sheets 6 and 6 constituting the double-layer structure in the edge region 520 of the inner extension portion 52 of the standing portion 51. With this configuration, the edge region 520 Stretchable in the longitudinal direction X. The front end of the half-folded side sheet 6 is joined to the front sheet 2 at the base end 50. Furthermore, the inner extension portion 52 of the upright portion 51 of the elastic member 7 does not necessarily need to be arranged at the edge area 520. From the viewpoint of improving the erection of the inner extension portion 52, it is preferably arranged at the edge portion Area 520.

In this embodiment, the elastic member 7 has a linear shape, and its length direction coincides with the longitudinal direction X, and is fixed in an extended state to the inner extension portion 52 (edge region 520) constituting the rising portion 51 in the side sheet 6 The part. The elastic member 7 is preferably in the shape of a wire, and it may be in the shape of a belt instead of the wire. Moreover, in this embodiment, one (root) elastic member 7 is arranged on each leak-proof flanging 5, but the number of elastic members 7 in each leak-proof flanging 5 is not particularly limited, and can be one ( The root) can also be plural (root). Furthermore, assuming that the inner extension portion 52 of the standing portion 51 is stretchable in the longitudinal direction X, an elastic member may not be arranged on the inner extension portion 52. In this case, for example, as long as it is used as a leak-proof flange The part of the side sheet 6 constituting the inner extension portion 52 of the sheet material itself may have stretchability in the longitudinal direction X.

In this way, in this embodiment, the elastic member 7 is at least at the upright portion 51 (between the upright hindering portions 55 and 55 before and after the following longitudinal direction X in the leak-proof flange 5), and the inner extension portion 52 It is fixed to the side sheet 6 which is a sheet for leakage prevention flanging in a stretched state, whereby the upright portion 51 (inside extension portion 52) can be stretched in the longitudinal direction X. Moreover, the leak-proof cuff 5 of this embodiment is manufactured by fixing the elastic member 7 in an extended state to the side sheet 6 and then releasing the extended state. Due to this manufacturing method, the leak-proof cuff 5 is produced on the front , More specifically, there are a plurality of wrinkles on the front of the upright portion 51 (the inner extension portion 52). The wrinkles on the front of the leak-proof flanging 5 are arranged intermittently in the longitudinal direction X approximately regularly.

In this embodiment, as shown in FIG. 1, the side sheet 6 as the leak-proof cuff sheet spans substantially the entire length of the longitudinal direction X of the absorbent body 10, and is along the longitudinal direction X of the absorbent body 10. The side surface of the absorbent main body 10, that is, the skin-facing surface of the front sheet 2 is covered by the side sheet 6. Thereby, the pair of leak-proof cuffs 5 and 5 are arranged continuously in the longitudinal direction X from the front part F and the rear part R, respectively. The side sheet 6 is preferably a liquid impermeable sheet, and for example, what can be used as the back sheet 3 can be used.

As shown in FIG. 1, in the front part F and the rear part R, a stand-up hindering part 55 is formed as a part that hinders the rise of the stand-up part 51 (inside extension part 52), respectively. The standing portion 51 is a portion sandwiched between the standing blocking portion 55 of the front portion F and the standing blocking portion 55 of the rear portion R. In FIG. 5, the erection hindering part 55 of the rear part R is shown. The erection hindering portion 55 is formed by fixing the inner extension portion 52 constituting the erection portion 51 to the surface sheet 2. In the erection hindering portion 55, the inner extension portion 52 is preferably fixed to the front sheet 2 at least in a stretchable portion in the longitudinal direction X. In this embodiment, it is preferably the edge portion of the inner extension portion 52 The area 520 is fixed to the front sheet 2. In the present embodiment, the erection obstruction part 55 (the inner extension part 52 of the erection obstruction part 55) is fixed to the front sheet 2 at a position on the inner side of the base end part 50 in the lateral direction Y. The method of fixing the erection obstructing portion 55 and the front sheet 2, that is, the method of forming the erection obstructing portion 55 is not particularly limited. For example, a known fixation method such as hot melt adhesive or thermal welding can be used. Although not shown in the figure, the erection hindering part 55 of the front part F is also configured in the same manner as the erection hindering part 55 of the rear part R.

In this way, the inner extension portion 52 of the upright portion 51 that is stretchable in the longitudinal direction X is fixed to the front sheet 2 at both ends of the longitudinal direction X, and is respectively formed with the front portion F and the rear portion R The obstructing portion 55 is erected, whereby the portion of the erecting obstructing portion 55 between the front portion F and the upstanding obstructing portion 55 of the rear portion R in the leak-proof flanging 5 is extended by the inner extension portion 52. The contraction force of the (elastic member 7) can be as shown in Figures 3 and 4, using the side sheet 6 (leak-proof flanging sheet) and the fixed portion of the front sheet 2 as the base end 50 as a stand The base end stands up with the edge 52a of the inner extension part 52 as a free end. In addition, when the sanitary napkin 1 is worn, a pair of leak-proof cuffs 5, 5 stand up in this way, effectively preventing side leakage of excretion fluid such as menstrual blood excreted to the skin facing surface of the sanitary napkin 1. Also, although not shown, in the erected state of the leak-proof cuff 5, due to the contraction force of the inner extension 52 (elastic member 7), the entire sanitary napkin 1 is oriented in the longitudinal direction of the absorbent body 10 The central part of X is bent so as to protrude toward the non-skin facing side (the back sheet 3 side) and deforms into a boat shape, so it is easy to conform to the body shape of the wearer of the sanitary napkin 1.

As shown in FIG. 1, the part of the leak-proof flanging 5 that is located on the outer side of the vertical direction X than the erection hindering part 55 is fixed to other members by the end fixing part 56. In this embodiment, the "other members" are the front sheet 2 and the back sheet 3. In this embodiment, the end fixing portion 56 has a wavy or zigzag shape in a plan view as shown in FIG. 1, and at least the inner extension portion 52 of the leak-proof flange 5 and its vicinity, more specifically the side portion The part of the sheet 6 (leak-proof flanging sheet) spanning from the base end 50 to the edge 52a of the inner extension 52 is formed by being fixed to another member. The end fixing portion 56 is formed by a well-known fixing method such as hot melt adhesive or thermal welding. The coated portion with the adhesive or the thermally welded portion is compared with the peripheral portion ( The non-formed part of the end fixing part 56 is harder and more rigid. Furthermore, the top-view shape of the end fixing portion 56 is not limited to the linear shape shown in FIG. 1 and can be arbitrarily set. For example, the leak-proof flange 5 may be located closer to the longitudinal direction X than the standing obstructing portion 55 The entire outer side and the inner side of the base end portion 50 in the lateral direction Y is the end fixing portion 56 as a whole.

As shown in FIG. 1, the absorber 4 has a rear slit region RS arranged with a rear slit R1 extending in the longitudinal direction X in the rear part R as the second region. In this embodiment, the absorber 4 has a pair of rear slit regions RSr arranged on both sides of the longitudinal center line CL that bisects the absorber 4 (sanitary napkin 1) in the transverse direction Y and extends in the longitudinal direction X , RS1 as the rear slit area RS. The rear slit R1 is a slit formed in the absorber 4, and at the position where the rear slit R1 is formed, the forming material of the absorber 4 is cut or the forming material is separated from each other compared to other parts. In the sanitary napkin 1, the rear slit R1 is linear in plan view, but the plan view shape of the rear slit R1 is not limited to this, and may be a wave line or the like. In addition, the rear slit R1 only needs to extend in the longitudinal direction X, and may not be parallel to the longitudinal centerline CL as shown in the figure, as long as the angle formed by the longitudinal centerline CL (longitudinal X) in a plan view is less than 45 degrees OK. The angle formed by the rear slit R1 and the longitudinal direction X is preferably less than 30 degrees, more preferably less than 10 degrees, and even more preferably 0 degrees, that is, the rear slit R1 preferably extends parallel to the longitudinal direction X.

In the pair of rear slit regions RSr and RS1, only one rear slit R1 is arranged, or a plurality of rear slits R1 are dispersedly arranged. In the present embodiment, as shown in FIGS. 1 and 6, in the pair of rear slit regions RSr and RS1, four rear slits R1 are respectively dispersedly arranged. When only one rear slit R1 is arranged in the rear slit regions RSr, RS1, the one rear slit R1 itself is the rear slit regions RSr, RS1. In addition, when a plurality of rear slits R1 are dispersedly arranged in the rear slit regions RSr and RS1, as shown in FIG. 6, the ranges of the regions RSr and RS1 are the ranges of the top view quadrilateral respectively, and the top view quadrilateral will be located on its own The longitudinal length from the front end of the frontmost rear slit R1 in the longitudinal direction X to the rear end of the rear slit R1 located in the rearmost position is taken as the longitudinal length, and from the inner edge of the rearmost slit R1 located in the transverse direction Y to the outermost rear end The outer edge of the slit R1 serves as the lateral length.

The number of rear slits R1 existing in each of the pair of rear slit regions RSr and RS1 is not particularly limited, and is preferably 2 or more, more preferably 3 or more, and preferably 9 or less, More preferably, it is 7 or less.

When a pair of rear slit regions RSr and RS1 respectively have a plurality of rear slits R1, any one of the planar shape of the plurality of rear slits R1 and the inclination angle with respect to the longitudinal center line CL (longitudinal X) One or both may be the same as each other or different. Moreover, when the rear slit regions RSr and RS1 respectively have a plurality of rear slits R1, it is preferable to have a pattern in which the plurality of rear slits R1 are arranged in a row in the longitudinal direction X as shown in FIG. 6 There are two or more rear slits R1 with different positions in the horizontal Y.

In the sanitary napkin 1, as shown in FIG. 6, the planar shape of the plurality of rear slits R1 in each of the rear slit regions RSr and RS1 and the inclination angle with respect to the longitudinal center line CL are the same, and each rear slit R1 extends in a straight line parallel to the vertical center line CL. There are four rear slits R1 in the rear slit regions RSr and RS1, respectively, and the four rear slits R1 are arranged in a state of being dispersed in both the longitudinal X and the lateral Y directions, more specifically, they are arranged in a zigzag shape. Specifically, the zigzag arrangement of the rear slit R1 in each of the rear slit regions RSr and RS1 is as follows: a slit formed by intermittently arranging a plurality of (2) rear slits R1 in the longitudinal direction X When the slit row is projected in the horizontal direction Y, other rear slits adjacent to the slit row in the horizontal direction Y are arranged between the projection images of the slit R1 that constitutes the slit row Projection image of slit R1.

Preferably, the rear slit R1 penetrates the absorber 4 as shown in FIG. 4. Moreover, it is preferable that the rear slit R1 is not formed in the front sheet 2 and the back sheet 3 arrange|positioned above and below the absorber 4 as shown in FIG. In addition, although not shown, when another sheet is interposed between the front sheet 2 and the absorber 4, the rear slit R1 is preferably not formed in the other sheet. As the "other sheet" here, for example, liquid-permeable sheets such as non-woven fabrics called sublayers etc. in the technical field can be cited.

The rear slit area RS is very helpful for improving the conformability of the sanitary napkin 1. For example, the menstrual period sanitary napkin used for the night of sanitary napkin 1 has a relatively long length in the longitudinal direction X, so it is required to span a large area in the front and back direction of the crotch to closely follow it. However, in particular, the excretory part such as the vaginal opening and its vicinity have a relatively large radius of curvature and a small degree of curvature. In contrast, the groove of the buttocks located more rearward (dorsal) than the excretory part and the curvature radius of its vicinity are relatively relatively large The surface shape of the continuous part from the excretion part to the buttocks ditch changes drastically. Therefore, the menstrual sanitary napkin used in the previous night has insufficient conformability to this part. On the other hand, the sanitary napkin 1 has the rear slit region RS of the above-mentioned configuration in the rear part R of the absorbent body 4, so the part from the excretory part to the buttocks where the surface shape changes sharply can be deformed without wrinkles and can be worn. Adhesively and closely.

In addition, in the sanitary napkin 1, as shown in FIG. 1, the upright hindering portion 55 of the leak-proof cuff 5 located at the rear portion R is located further behind the longitudinal direction X than the longitudinal rear end of the rear slit region RS, by This structure improves the standing property of the leak-proof cuff 5, especially the standing property in the rear portion R. Moreover, the sanitary napkin 1 cooperates with the above-mentioned rear slit R1 to follow the wearer's crotch, especially the part where the surface shape changes rapidly, that is, the part from the excretory part to the buttocks (gluteal groove). Tight, leak-proof cuffs 5 fit around the buttocks, so it can effectively prevent liquid leakage from the back when the wearer falls asleep, which is a unique problem of menstrual sanitary napkins used at night.

Here, the "longitudinal rear end of the rear slit region RS" refers to the longitudinal X rear end of the slit R1 located at the rearmost rear of the longitudinal X in the rear slit region RS. When there are a plurality of rear slit regions RS as in the present embodiment, the longitudinal X of the rear slit R1 of all the rear slits R1 in the plurality of rear slit regions RS is located at the rearmost of the longitudinal direction X The rear end is the aforementioned "longitudinal rear end of the rear slit region RS". For example, in the sanitary napkin 1 of this embodiment, there are a pair of left and right rear slit regions RSr and RS1 as the rear slit regions RS. As shown in FIG. 6, one of the rear slit regions RSr and the other rear slit When the position of the longitudinal rear end in the region RS1 is the same, the longitudinal X rear end of the rear slit R1 located at the rearmost of the longitudinal X in each of the two regions RSr and RS1 is the above-mentioned "the longitudinal rear of the rear slit region RS When the position is different, the rear end of the longitudinal X of the slit R1 located at the rearmost rear of the longitudinal X in the region RSr or RS1 located relatively rearward of the longitudinal X is the above-mentioned "rear slit region RS Longitudinal rear end". That is, when the position of the longitudinal rear end in one of the rear slit regions RSr and the other rear slit region RS1 is different, the erection hindering portion 55 is only required to be located in a rear slit region located at the rearmost position in the longitudinal direction X It can be more behind the vertical X. With the sanitary napkin 1 with this structure, even when the elongation stress of the elastic member 7 constituting the leak-proof cuff 5 is low, the leak-proof cuff 5 can easily stand up, and it can be fitted by wrapping the wearer’s buttocks. Therefore, the peculiar problem of menstrual sanitary napkins used at night is solved, that is, when the wearer falls asleep, menstrual blood and other body fluids move along the wearer's body to the hip side and leak to the outside.

In particular, in the present embodiment, as shown in FIG. 6, the rear slit regions RSr and RS1 are separated from each other by a longitudinal center line CL that halves the absorber 4 in the transverse direction Y and extends in the longitudinal direction X. There is a pair on the side, one of the rear slit area RSr and the other rear slit area RS1 are separated in the lateral direction Y. Therefore, for the sanitary napkin 1, it can further reduce the wrinkles generated when deforming to follow the wearer’s buttocks. Possibility to further improve compliance.

From the viewpoint of more surely exerting the effect of the design of the positional relationship between the erection hindering portion 55 of the leak-proof flanging 5 and the rear slit regions RSr, RS1, the erection hindering portion 55 and the rear narrow The separation distance G1 (refer to Fig. 1) of the longitudinal rear end of the slit region RS (RSr, RSl) relative to the total length of the absorbent body 10 in the longitudinal direction X is preferably 5.0% or more, more preferably 6.25% or more, and more preferably It is 15% or less, more preferably 12.5% or less. In addition, the separation distance G1 is preferably 15 mm or more, more preferably 25 mm or more, and more preferably 60 mm or less, more preferably 50 mm or less. If the separation distance G1 is in the above range, from the rear part R to the middle part M, the deformation of the sanitary napkin 1 that is useful for conforming to the wearer's body is easily transmitted to the leak-proof cuff 5, and it is leak-proof when wearing the sanitary napkin 1. The standability of the side 5 is further improved, thereby obtaining a higher leakage prevention effect.

In addition, in the sanitary napkin 1, in the erected state of the leak-proof cuff 5, as shown in FIGS. 3 and 4, the inner extended portion 52 constituting the erected portion 51 is located more upright than when it is erected The base end 50 of the base end is closer to the inner side of the lateral Y. With this configuration, a pocket-like structure P that can capture excretion fluid such as menstrual blood is formed between the front sheet 2 and the upright portion 51 (inner extension part 52), thereby effectively preventing the excretion fluid from going laterally Y leaks outside, so-called side leakage. Therefore, according to the sanitary napkin 1, the effects produced by the above-mentioned rear slit regions RSr and RS1 are complementary to those produced by the position where the hindering portion 55 is erected, and especially the liquid leakage in the rear portion R can be effectively prevented.

As shown in Fig. 1, on the skin-facing surface of the absorbent body 10, the front sheet 2 and the absorber 4 are integrally recessed toward the back sheet 3 side, and the longitudinal grooves 8 extending in the longitudinal direction X are A pair of transverse grooves 9 extending in the transverse direction Y are formed at a certain interval in the transverse direction Y, and is connected to the rear end of each of the pair of longitudinal grooves 8 and 8 in the longitudinal direction X. The pair of longitudinal grooves 8 and 8 are continuous from the front part F through the middle part M and to the rear part R, respectively. In the plan view as shown in FIG. 1, the transverse groove 9 has a convex shape protruding toward the outside of the longitudinal direction X, and the top of the protrusion is located on the longitudinal center line CL.

The longitudinal groove 8 only needs to have a linear shape extending in the longitudinal direction X in a plan view, and the angle formed by the longitudinal direction and the longitudinal direction X may be less than 45 degrees. The horizontal groove 9 only needs to have a linear shape extending in the horizontal direction Y in a plan view, and the angle formed by the longitudinal direction and the horizontal direction Y may be less than 60 degrees. In addition, the two grooves 8, 9 may be continuous linear grooves that are continuous along the longitudinal direction of the recessed portion (the part formed by the front sheet 2 and the absorbent body 4 being recessed integrally toward the back sheet 3 side), or also It may be a discontinuous linear groove formed by alternately arranging recessed portions and non-recessed portions (flat portions) in the longitudinal direction. In the groove of the discontinuous line, the interval between adjacent recessed portions in the longitudinal direction (the length of the non-recessed portion in the longitudinal direction) is preferably 5 mm or less. In addition, the connection between the vertical groove 8 and the horizontal groove 9 includes not only the form in which the recesses of the two grooves 8 and 9 are continuous, but also the form in which a non-recessed part is interposed between the longitudinal groove 8 and the horizontal groove 9, which is the latter form Next, the interval between the vertical groove 8 and the horizontal groove 9 (the length of the intervening non-recessed portion along the longitudinal direction of the two grooves 8, 9) is preferably 5 mm or less.

In this embodiment, horizontal grooves 9 are formed in the front part F and the rear part R, respectively. The horizontal groove 9 of the front part F is connected to the front end of the longitudinal X of each of the pair of longitudinal grooves 8, 8, and the horizontal groove 9 of the rear part R is connected to the rear end of the longitudinal X of each of the pair of longitudinal grooves 8, 8. The connecting body of 8 and 9 is in a closed ring shape when viewed from above. The vertical groove 8 and the horizontal groove 9 are each formed symmetrically with respect to the vertical center line CL. In the area enclosed by the vertical groove 8 and the horizontal groove 9, there is the following middle-high portion 43 (a region where the basis weight of the water-absorbent material in the middle portion M is higher than the front portion F and the rear portion R).

Also, as shown in Figures 1 and 7, on the skin-facing surface of the absorbent body 10, on the inner side of the longitudinal direction X than the lateral groove 9 of the rear portion R, there is formed a portion extending in the lateral direction Y (lateral The groove portion) 13b within the groove 13. The inner groove 13 is located in the area enclosed by the longitudinal groove 8 and the horizontal groove 9 further behind the longitudinal direction X than the middle-high part 43. The inner groove 13 includes a pair of longitudinal groove portions 13a, 13a extending in the longitudinal direction X, and a lateral groove portion 13b connected to the rear end of each of the longitudinal groove portions 13a, 13a in the longitudinal direction X. The longitudinal centerline CL is The reference is formed symmetrically. The horizontal groove portion 13b has a convex shape that protrudes toward the outside of the longitudinal direction X in a plan view, and the top of the protrusion is located on the longitudinal center line CL. Furthermore, the connecting portion between the longitudinal groove portion 13a and the lateral groove portion 13b is located at the inflection point of the inner groove 13, and therefore, the lateral groove portion 13b is located on the outer side of the longitudinal direction X than the inflection point in the inner groove 13. For the inner tank 13, the description of the above-mentioned tanks 8 and 9 is also appropriately applied.

In addition, the rear end of the inner groove 13 is located more forward in the longitudinal direction X than the erection hindering portion 55 of the rear portion R. Therefore, when the sanitary napkin 1 is deformed into a boat shape, the rear portion R can be deformed according to the wearer's movement or body shape, and excessive deformation of the absorbent body 4 can be suppressed. Therefore, the leak-proof cuff 5 (standing portion 51) The uprightness. In particular, as shown in FIG. 1, the lateral groove portion 13b of the inner groove 13 is arranged to overlap the rear wing piece fixing material 11 in the lateral direction Y, thereby suppressing the deviation of the rear portion R in the longitudinal direction X It can be deformed moderately, so it can further improve the standing property of the leak-proof cuff 5 (standing part 51) during wearing.

The above-mentioned grooves 8, 9, and 13 function as so-called leak-proof grooves, which can suppress the diffusion of the liquid in the plane direction of the absorber 4, especially the horizontal Y, and prevent wrinkles of the absorber 4. The grooves 8, 9, and 13 can be formed by embossing with or without heat, or by embossing such as ultrasonic embossing. In the grooves 8, 9, and 13, the front sheet 2 and the absorber 4 are integrated by thermal welding or the like, and the bottoms of the grooves 8, 9, and 13 have a higher density than the peripheral portions thereof.

In the sanitary napkin 1, as described above, by designing the position of the erection hindering portion 55 of the rear portion R in relation to the longitudinal rear ends of the rear slit regions RSr and RS1, the leakage prevention in the rear portion R is particularly improved In this embodiment, the standing property of the side 5 is further designed in relation to the transverse groove 9 to further improve the standing property of the leak-proof flange 5. Specifically, as shown in FIG. 7, in this embodiment, the upright hindering portion 55 of the rear portion R overlaps with the longitudinal front end 9a of the lateral groove 9, or is located closer to the longitudinal direction X than the longitudinal front end 9a of the lateral groove 9 Afterwards. The longitudinal front end 9a of the transverse groove 9 is located at the junction of the longitudinal groove 8 and the transverse groove 9, that is, the inflection point. With this structure, the rear portion R of the sanitary napkin 1 easily protrudes toward the non-skin facing side, that is, the back sheet 3 side, starting from the longitudinal front end 9a of the transverse groove 9 (to the skin facing side, that is, the front sheet) 2 sides recessed) to bend and deform into a boat shape. Therefore, the pocket-like structure P of the leak-proof cuff 5 (refer to Figures 3 and 4) has a deeper shape to further effectively prevent falling asleep The liquid leaks. From the viewpoint of more surely exerting this effect, the separation distance G2 (refer to FIG. 7) between the standing hindering portion 55 and the longitudinal front end 9a of the lateral groove 9 is preferably 35 mm or less, more preferably 30 mm or less.

Moreover, in this embodiment, as shown in FIG. 7, the upright hindering part 55 of the rear part R is located behind the longitudinal direction X of the rear wing part fixing material 11. As shown in FIG. With this configuration, the part of the sanitary napkin 1 located further behind the longitudinal direction X than the rear flap portion fixing material 11, especially the rear end of the sanitary napkin 1 in the longitudinal direction X, is easily accompanied by the leak-proof flange 5 (stand The upright portion 51) deforms the way in which the buttocks are wrapped, so that the conformability and liquid leakage resistance are further improved, thereby further effectively preventing liquid leakage when falling asleep. From the viewpoint of more surely exerting this effect, the separation distance G3 (refer to FIG. 7) between the erection hindering portion 55 and the rear wing piece fixing member 11 is preferably 10 mm or more, and more preferably 15 mm or more, Moreover, it is preferably 40 mm or less, and more preferably 35 mm or less.

The pair of longitudinal grooves 8 and 8 respectively include an indented portion 80 in the rear portion R in a plan view as shown in FIG. 7. In the form shown in FIG. 7, the pair of longitudinal grooves 8 and 8 each include two indented portions 80. The indented portion 80 can be the starting point when the sanitary napkin 1 is deformed into a so-called boat shape so as to protrude toward the non-skin facing surface. The existence of the indented portion 80 facilitates the deformation of the sanitary napkin 1.

Furthermore, the longitudinal groove 8 may also include a splitting part instead of the inwardly-contracted part, or include a splitting part together with the inwardly-contracted part. The breaking portion is a portion where the longitudinal groove 8 loses continuity, and includes a non-recessed portion (flat portion) where a recessed portion constituting the longitudinal groove 8 is not formed. The split part is also a part that can be the starting point when the sanitary napkin 1 is deformed into a so-called boat shape so as to protrude to the non-skin facing surface side, similarly to the indented part.

In addition, in the skin facing surface of the absorbent body 10, a row 15 of recesses is formed further behind the longitudinal direction X than the horizontal groove 9 is formed by disposing a plurality of recesses 14 intermittently in one direction. In a plan view, it has a curved shape (arc shape) protruding toward the outside of the longitudinal direction X. The recessed part 14 is a part in which the surface sheet 2 and the absorber 4 are integrally recessed toward the back sheet 3 side similarly to the part which comprises the grooves 8, 9, and 13. The distance between the adjacent recesses 14, 14 in the recess row 15 is preferably 5 mm or more, more preferably 7 mm or more, and more preferably 15 mm or less, more preferably 13 mm or less. Compared with the horizontal groove 9, the concave portion row 15 has a larger radius of curvature, that is, compared with the horizontal groove 9, the curvature is smaller. The radius of curvature of the recessed portion row 15 is the radius of curvature that passes through the imaginary curve (the dashed line in FIG. 7) of all the recessed portions 14 constituting the recessed portion row 15.

In this way, the longitudinal groove 8 includes an indented portion 80 at the rear portion R that becomes the starting point when the rear portion R is deformed into a boat shape, and a recessed portion meeting specific conditions is formed behind the transverse groove 9 in the longitudinal direction X In the case of line 15, as shown in FIG. 7, the erection hindering portion 55 of the rear portion R is located between the imaginary straight line V1 and the imaginary straight line V2, and the imaginary curve V1 passes through the indented portion 80 contained in the longitudinal groove 8 The rearmost part of the longitudinal direction X extends in the transverse direction Y. The imaginary curve V2 passes through the rear end of the longitudinal X of the recessed portion row 15 and extends in the transverse direction Y, thereby further easily causing the rear portion R to deform into a boat shape. As a result, Further improve the conformability of the sanitary napkin 1 in the longitudinal direction X. In particular, since the erection hindering portion 55 is positioned forward of the longitudinal direction X relative to the imaginary straight line V2, the leak-proof groove is overlapped with two layers and the part that is difficult to deform into a boat shape is protruded toward the non-skin facing surface. The body side of the person is pulled up to promote the deformation into a boat shape.

In addition, there is a row 15 of recesses at the rear end of the sanitary napkin 1, which is located further behind the transverse groove 9 in the longitudinal direction X, to impart hardness to the rear end, thereby effectively preventing the wearing of the sanitary napkin 1 Bending or rolling up of the rear end. On the other hand, because there is a row 15 of recesses at the rear end of the sanitary napkin 1, it is feared that the decrease in the flexibility of the rear end may cause a decrease in the conformability of the sanitary napkin 1 or a feeling of discomfort during wearing. By setting the distance between the adjacent recessed portions 14 and 14 in the recessed portion row 15 to be 5 mm or more, the reduction in the flexibility of the rear end portion, etc., is suppressed to the minimum, thereby eliminating this concern. Furthermore, with regard to the radius of curvature, the magnitude relationship of "the radius of curvature of the transverse groove 9 located relatively in front of the longitudinal direction X<the radius of curvature of the recessed portion row 15 located relatively behind the longitudinal direction X" is established, thereby The front is facing the rear, and the ease of bending (easy to deform) of the rear part R increases, so it effectively prevents unplanned wrinkles or breaks when wearing the sanitary napkin 1, so that it is not easy to cause discomfort to the wearer of the sanitary napkin 1 . In particular, in the present embodiment, if the curvature radius of the lateral groove portion 13b of the inner groove 13 that is located more forward in the longitudinal direction X than the lateral groove 9 is also considered, as shown in FIG. 7, in the rear portion R, In terms of the radius of curvature, from the front to the rear in the longitudinal direction X, the size relationship of "horizontal groove 13b<horizontal groove 9<indented part row 15" is established, so it can further effectively prevent wrinkles or breakage of the rear part R, thereby further Effectively reduce discomfort when wearing.

Furthermore, in the sanitary napkin 1, as described above, as shown in FIG. 2, the main body fixing material 12 disposed on the non-skin facing surface of the absorbent main body 10 is intermittently disposed in the longitudinal direction X, and thus is in contact with the erection hindering portion 55 Complementing the effects produced by the positional relationship of the imaginary straight lines V1 and V2, the sanitary napkin 1 is easily deformed into a boat shape, thereby further improving the conformability.

The length of the free end of the free ends of the standing hindering portions 55, 55 in the leak-proof flange 5 sandwiched between the two ends of the longitudinal direction X, that is, the longitudinal direction of the edge portion 52a of the inner extension portion 52 of the standing portion 51 The length of X is preferably shorter than the length of the longitudinal direction X of the non-rising part of the leak-proof flange 5. The "non-rising part of the leak-proof flanging 5" here is the base end part 50, and it is the part of the rising base end when the leak-proof flanging 5 is erected. In addition, the term "length" here refers to the length of each part in a state where the leak-proof cuff 5 is maximized against the contraction force of the elastic member 7. By such "the longitudinal length of the free end of the part sandwiched between the erection hindering parts 55, 55 (the edge 52a of the inner extension part 52 of the erect part 51) <the non-rising part of the leak-proof flange 5 ( The size relationship of the "longitudinal length of the base end 50) is established, and the amount of deformation on the side of the non-rising portion is greater than that on the free end. The pocket-like structure P of the leak-proof cuff 5 (refer to Figures 3 and 4) is easy to follow The shape of the wearer's buttocks is deformed, so the liquid leakage resistance can be further improved. The longitudinal length of the non-rising part (base end part 50) of the leak-proof flange 5 and the free end of the part sandwiched between the erection hindering parts 55 and 55 (the edge part 52a of the inner extension part 52 of the erect part 51) The ratio of the longitudinal length of the former is greater than the latter, and the former/the latter is preferably 1.01 or more, more preferably 1.03 or more, and more preferably 1.30 or less, more preferably 1.25 or less.

If the absorber 4 is further described, the absorber 4 includes a water-absorbing material. As the above-mentioned water-absorbent material, it can be used without particular limitation. It can be used in the absorber of such absorbent articles. Examples include hydrophilic fibers and water-absorbent polymers. One of these can be used alone or in combination of two. Used above. As the hydrophilic fiber, it may be a fiber that is inherently hydrophilic, or may be a fiber obtained by hydrophilizing the water-based fiber, and the former is particularly preferred. As the fibers that are inherently hydrophilic, natural fibers, cellulose-based regenerated fibers, or semi-synthetic fibers are cited as preferred examples, and preferred examples include pulp and rayon. Among the pulps, in addition to wood pulps such as softwood kraft pulp and hardwood kraft pulp, there are non-wood pulps such as cotton pulp and straw pulp, etc., and there is no particular limitation. In addition, bulky cellulose fibers obtained by mercerizing cross-linked cellulose fibers and wood pulp formed by intra-molecular and/or intermolecular cross-linking of cellulose fibers can also be used. As the water-absorbent polymer, those in the form of particles can generally be used, but those in the form of fibers may also be used. The shape of the particulate water-absorbing polymer is not particularly limited, and may be, for example, a spherical shape, a block shape, a bag shape, or an indefinite shape. Typically, the water-absorbing polymer is mainly composed of acrylic acid or acrylic acid alkali metal salt polymer or copolymer.

As shown in Figures 3 to 5, the absorbent body 4 in the sanitary napkin 1 includes a central absorbent sheet 41 arranged opposite to the excretion part of the wearer when worn, and a central absorbent sheet 41 with a top view. The superimposed portion and the main absorbent sheet 42 extending from the periphery of the central absorbent sheet 41 to the outside are constituted by a laminated structure of a plurality of sheets. Both absorbent sheets 41 and 42 contain hydrophilic fibers and water-absorbing polymers.

In the present invention, the so-called "absorbent sheet" refers to a sheet-like absorbent structure containing hydrophilic fibers, water-absorbent polymers and other water-absorbing materials, and a fiber stack formed by stacking water-absorbent material fibers The difference. Generally speaking, the absorbent sheet is thinner and less rigid than the fiber accumulation of the absorbent material. Therefore, the absorbent article with the absorbent sheet is a thinner, softer and better wearing feeling. In addition, it can be folded to a small size and is excellent in handling. From the viewpoint of making more effective use of the characteristics of the absorbent sheet to obtain an absorbent article that has sufficient liquid diffusibility and liquid retention, and has a good wearing feeling, the absorbent sheet has 5 cN/cm ² per sheet The thickness under load is preferably 0.1 mm or more, more preferably 0.3 mm or more, and more preferably 2 mm or less, more preferably 1.5 mm or less. As the absorbent sheet, for example, those described in Patent No. 2963647 and Patent No. 2955223 can be used. If it is exemplified as an absorbent sheet, it can be exemplified by the adhesive force generated by the water-absorbent polymer in a wet state or the adhesive or adhesive fiber and other binders added to polymerize the constituent fibers or the constituent fibers and the water absorption. The combination of objects is made into a sheet.

As shown in FIG. 1, the central absorbent sheet 41 is arranged in the middle part M or the part near the middle part M between the middle part M and the front part F in the central part of the sanitary napkin 1 or the absorbent body 10 in the horizontal direction. Moreover, as shown in FIG. 3, the central absorbent sheet 41 has a multilayer structure in which the sheet 41 is folded. The folded multi-layer structure of the central absorbent sheet 41 consists of a sheet 41 having a substantially rectangular shape in a plan view, and two strips extending in the longitudinal direction X by passing the sheet 41 into roughly three-half positions in the transverse direction Y When the bending line is bent to the same surface side (skin facing surface side) to form a so-called inner trifold state, the sheet 41 has a three-layer structure.

In addition, as shown in FIGS. 3 to 5, the main body absorbent sheet 42 also has a multilayer structure in which the sheet 42 is folded. The folded multi-layer structure of the main body absorbent sheet 42 is to bend a sheet 42 of a substantially rectangular shape in a plan view on two bending lines extending in the longitudinal direction X to the same side (non-skin facing side) And formed by overlapping the two end edges of the sheet material 41 along the longitudinal direction X with the central part of the transverse direction Y, the overlapping part of the two end edges has the three-layer structure of the sheet material 42, and the part other than the overlapping part It has a two-layer structure of the sheet 42. The folded multilayer structure of the main body absorbent sheet 42 forms the outer shape of the absorbent body 4.

In this way, the absorbent body 4 in the sanitary napkin 1 has a folded structure in which a central absorbent sheet 41 is enclosed within the folded structure of a body absorbent sheet 42, and the middle part M is in the transverse direction Y The central part has a folded structure in which the central absorbent sheet 41 is arranged, and becomes a middle-high part 43 that is thicker than the peripheral part and bulges toward the skin facing side. On the other hand, the absorbent body 4 does not have the folded structure of the central absorbent sheet 41 except for the mid-high portion 43, and is constituted by including the folded structure of the main absorbent sheet 42, so that it is thicker than the mid-high portion 43. Smaller standard absorber 44.

In this way, in the middle part M, there is an area where the basis weight of the water-absorbing material is higher than that of the front part F and the rear part R, that is, the middle-high part 43. As shown in FIG. 6, the middle-high portion 43 is arranged at a position separated from the rear slit region RS (RSr, RS1) by a certain distance, and the middle-high portion 43 and the rear slit region RS become a non-slit forming area where no slit is formed. . That is, the sanitary napkin 1 has a middle-high part 43, a non-slit forming area, and a rear slit area RS in the longitudinal direction X from the middle part M to the rear part R. The above means that as the middle part M goes to the rear part R, The decrease in basis weight means the decrease in rigidity. With this configuration, in the wearer's crotch, especially the part where the surface shape changes sharply, that is, the part from the excretion part to the buttocks groove, the sanitary napkin 1 is easily deformed so that it can follow the part without wrinkles, so it can improve the fit. Sex.

As shown in FIG. 1, the middle-high portion 43 has a rectangular shape in a plan view, its length direction is consistent with the longitudinal direction X, and is arranged at the center portion of the middle portion M in the transverse direction Y. However, the top-view shape of the middle-high part 43 can be arbitrarily selected, and is not limited to a rectangular shape. The length of the longitudinal direction X of the middle-high portion 43 is preferably 60 mm or more, more preferably 80 mm or more, and more preferably 150 mm or less, more preferably 120 mm or less. In addition, the length of the lateral Y of the middle-high portion 43 is preferably 25 mm or more, more preferably 30 mm or more, more preferably 55 mm or less, and more preferably 50 mm or less.

The thickness of the mid-high portion 43 in the absorber 4 is preferably 0.7 mm or more, more preferably 1 mm or more, and more preferably 5 mm or less, and more preferably 4 mm or less. By setting the thickness of the middle-high part 43 to this range, it is easy to balance the good wearing feeling and high absorption performance in the middle part M where the middle-high part 43 is formed. In addition, when an absorbent article like the sanitary napkin 1 has wings, it is easy to suppress wrinkles of the absorbent body in the middle part M during wearing. In addition, the thickness of the standard absorbent portion 44 in the absorbent body 4 is preferably 0.3 mm or more, more preferably 0.5 mm or more, and more preferably 3 mm or less, and more preferably 2.5 mm or less. By setting the thickness of the standard absorbing portion 44 to this range, higher absorption performance and followability to the wearer's actions can be further improved. The thickness of the absorber and the absorbent sheet was measured by the following method.

<Method for measuring thickness of absorbent sheet and absorber> Place the absorbent sheet or absorber as the object to be measured in a horizontal position without wrinkles or bends, and measure 5 cN/cm The thickness under the load of ² . For the measurement of the thickness in the present invention, a thickness meter PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG. CO. LTD.) is used. At this time, a circular or square flat plate (acrylic resin plate with a thickness of about 5 mm) in plan view is placed between the front end of the thickness gauge and the measurement part of the object to be measured, and the load becomes 5 cN/cm ² The way to adjust the size of the tablet.

As shown in FIGS. 1, 3 and 6, in the sanitary napkin 1, the absorbent body 4 has a central slit area MS in the middle portion M where a central slit M1 extending in the longitudinal direction X is arranged. The central slit area MS exists so as to overlap with the middle-high part 43. Since there is a central slit area MS in the middle and high portion 43, when the sanitary napkin 1 is worn, even if the wearer’s thighs exert a force to compress the absorbent body 4 in the lateral direction Y, the absorbent body 4 is in the central slit area. Various parts of MS are thinly deformed, so it is not easy to produce deep curved wrinkles in the absorbent body 4 or the sanitary napkin 1. Therefore, it can effectively prevent the defects caused by the deeper curved wrinkles, such as discomfort for the wearer, and leakage of liquid along the curved wrinkles. Therefore, according to the sanitary napkin 1, due to the effects produced by both the central slit area MS and the rear slit areas RSr, RS1, the wearer’s skin is not easy to produce gaps during wearing, thereby effectively preventing liquid from flowing from the Leakage in the gap.

The central slit M1 is a slit formed in the absorber 4, and at the position where the central slit M1 is formed, the forming material of the absorber 4 is cut off or the forming material is separated from each other compared to other parts. In the sanitary napkin 1, the central slit M1 is linear in plan view, but the plan view shape of the central slit M1 is not limited to this, and may be a wave line or the like. In addition, the central slit M1 only needs to extend in the longitudinal direction X, and may not be parallel to the longitudinal centerline CL as shown in the figure, as long as the angle formed by the longitudinal centerline CL (longitudinal X) in a plan view is less than 45 degrees That is, it is preferably less than 30 degrees, particularly preferably less than 10 degrees, and most preferably 0 degrees.

In the central slit region MS, only one central slit M1 is arranged, or a plurality of central slits M1 are dispersedly arranged. In this embodiment, it is the latter. When only one central slit M1 is arranged in the central slit region MS, the one central slit M1 itself is the central slit region MS. Also, when a plurality of central slits M1 are dispersedly arranged in the central slit area MS, as shown in FIG. 6, the area of the area MS is the area of a top view quadrilateral, and the top view quadrilateral will be located from the forefront of the longitudinal direction X The longitudinal length is from the front end of the central slit M1 to the rear end of the central slit M1 located at the rearmost position, from the inner edge of the central slit M1 located at the innermost side of the transverse direction Y to the outer side of the central slit M1 located at the outermost side The edge serves as the lateral length.

In the central slit area MS, it is only necessary to have one or more central slits M1. The number of central slits M1 present in the central slit area MS is not particularly limited, and is preferably 10 or more, more preferably 20 or more, and preferably 40 or less, and more preferably 30 or less. When the central slit area MS has a plurality of central slits M1, either or both of the planar shape of the plurality of central slits M1 and the inclination angle with respect to the longitudinal center line CL may be the same as each other, or different. Furthermore, when the central slit area MS has a plurality of central slits M1, it is preferable to have a horizontal pattern as shown in FIG. 6 compared to a pattern in which the plurality of central slits M1 are arranged in a row in the longitudinal direction X A pattern of two or more central slits M1 with different positions of Y.

As shown in FIG. 6, in the sanitary napkin 1, the top view shape of the plurality of central slits M1 in the central slit area MS and the inclination angle with respect to the longitudinal center line CL are the same, and each central slit M1 is the same as the longitudinal center line. CL extends in parallel in a straight line. The plurality of central slits M1 in the central slit area MS are arranged in a state of being dispersed in both the longitudinal direction X and the lateral direction Y, and more specifically arranged in a zigzag shape. The zigzag arrangement of the central slit M1 is the same as the zigzag arrangement of the rear slit R1 described above.

The central slit M1 preferably penetrates the absorber 4 as shown in FIG. 3. Moreover, it is preferable that the center slit M1 is not formed in the front sheet 2 and the back sheet 3 arrange|positioned above and below the absorber 4 as shown in FIG. Also, although not shown, when another sheet (such as a sub-layer) is interposed between the front sheet 2 and the absorbent body 4, the central slit M1 is preferably not formed in the other sheet. .

As shown in FIG. 6, the central slit area MS and the rear slit area RS (RSr, RS1) are separated in the longitudinal direction X. That is, there is a non-slit formation area between the central slit area MS and the rear slit area RS. With this configuration, it is easier to deform the middle part M (the above-mentioned excretory part opposing part) and the rear part R so as to conform to each part of the wearer by the elastic force of the leak-proof cuff 5.

Furthermore, between the central slit area MS and the rear slit area RS (RSr, RS1), the bending line used when the absorbent body 10 is bent, that is, the central folding line CFL, extends in the lateral direction Y. With this configuration, the formation position of the central fold line CFL located between the central slit area MS and the rear slit area RS and the vicinity of the formation position of the central fold line CFL are prevented from being reduced in rigidity due to the formation of slits (cracks). In the case of sanitary napkin 1, the central fold line CFL is pressed up from the front and back of the longitudinal direction X to further improve the conformability. In addition, the continuity of the deformation of each of the central slit area MS and the rear slit area RS is divided by the central fold line CFL, so the deformation in each area unit is likely to be deformed to conform to the body of the wearer, and the result can be further Improve the conformability of sanitary napkin 1.

The distance d7 between the rear end of the central slit area MS (that is, the rear end of the central slit M1 located at the rear end of the longitudinal X in the central slit area MS) and the longitudinal front end of the rear slit area RS (refer to FIG. 6) is preferably 20 mm or more, more preferably 25 mm or more. The "longitudinal front end of the rear slit region RS" here is defined in the same way of thinking as the above-mentioned "the longitudinal rear end of the rear slit region RS", and in the form shown in FIG. 6 is the rear slit region RSr, Among each of RS1, it is located at the front end of the rearmost slit R1 in the longitudinal direction X. In addition, if the separation distance d7 is too long, the effect of making the central fold line CFL and the skin close together may be weakened, and a gap between the sanitary napkin 1 and the skin may easily occur. In the above case, the upper limit of the separation distance S7 is preferably 40 mm, more preferably 35 mm.

From the viewpoint of more surely exerting the above-mentioned functions and effects, the size of each part of the absorber 4 is preferably set in the following manner. The interval d1 of the narrowest part in the lateral direction Y between the pair of rear slit regions RSr and RS1 (refer to FIG. 6) is preferably 10 mm or more, more preferably 20 mm or more, and more preferably 40 mm or less , More preferably less than 30 mm.

The interval d2 between the central fold line CFL and the rear slit region RS (RSr, RS1), that is, the interval d2 between the central fold line CFL and the rear slit region RS, which is located at the frontmost rear slit R1 in the longitudinal direction X (refer to FIG. 6) It is preferably 10 mm or more, more preferably 15 mm or more, and more preferably 40 mm or less, and more preferably 35 mm or less. Furthermore, in actual products, the central fold line CFL usually has a specific length or width in the longitudinal direction X, and is in the shape of a thin strip in plan view with a width wider than the thin line as shown in the figure. Regarding the central fold line CFL of this thin strip shape The above-mentioned interval d2 refers to the longitudinal direction of one of the opposite ends (front end, rear end) of the central fold line CFL along the extending direction (transverse Y in the form of the figure) The back side end of X is measured as the measurement position on the center fold line CFL side, that is, the distance between the back side end of the center fold line CFL and the rear slit region RS. Moreover, when the central fold line is not a straight line parallel to the lateral direction Y as shown in FIG. 6, the interval d2 between the non-linear central fold line CFL and the rear slit region RS means that it will be located on the longitudinal center line CL The above-mentioned rear end of the central fold line CFL is measured as the measurement position on the side of the central fold line CFL.

The length L1 of the longitudinal direction X of the rear slit R1 (refer to FIG. 6) is preferably 10 mm or more, more preferably 15 mm or more, and more preferably 35 mm or less, and more preferably 25 mm or less. The width b1 (refer to FIG. 6), which is the length of the lateral Y of the rear slit R1, is preferably 0.1 mm or more, more preferably 0.2 mm or more, and more preferably 1 mm or less, more preferably 0.8 mm or less. In the rear slit regions RSr, RS1, a plurality of rear slits R1 are arranged in a row in the longitudinal direction X. The interval between the rear slits R1 and R1 in the longitudinal direction X (1 rear slit region In the longitudinal direction, the longitudinal interval between the slits closest to each other in the longitudinal direction) d3 (refer to Figure 6) is preferably 10 mm or more, more preferably 15 mm or more, and more preferably 35 mm or less, more preferably 25 mm or less. In the rear slit regions RSr, RS1, a plurality of rear slits R1 are arranged in a row in the transverse direction Y. The interval between the rear slits R1 and R1 in the transverse direction Y (1 rear slit region In the transverse direction, the distance between the rear slits closest to each other in the transverse direction) d4 (refer to Figure 6) is preferably 5 mm or more, more preferably 10 mm or more, and more preferably 25 mm or less, more preferably 20 mm or less.

The length L2 of the longitudinal direction X of the central slit M1 (refer to FIG. 6) is preferably 10 mm or more, more preferably 15 mm or more, and more preferably 35 mm or less, more preferably 25 mm or less. The width b2 (see FIG. 6) of the length of the central slit M1 in the lateral direction Y is preferably 0.1 mm or more, more preferably 0.2 mm or more, and more preferably 1 mm or less, and more preferably 0.8 mm or less. In the central slit area MS, a plurality of central slits M1 are arranged in a row in the longitudinal direction X. The interval between the central slits M1 and M1 in the longitudinal direction X in the longitudinal slit row (the central slit area is in the longitudinal direction The longitudinal interval between the closest central slits) d5 (refer to FIG. 6) is preferably 10 mm or more, more preferably 15 mm or more, and more preferably 35 mm or less, more preferably 25 mm or less. In the central slit area MS, a plurality of central slits M1 are arranged in a row in the lateral direction Y. The interval between the central slits M1 and M1 in the lateral direction Y in the horizontal slit row (in the central slit area in the lateral direction The lateral interval between the closest central slits) d6 (refer to FIG. 6) is preferably 5 mm or more, more preferably 10 mm or more, and more preferably 25 mm or less, more preferably 20 mm or less.

In addition, the interval d1 (refer to FIG. 6) between the narrowest part in the lateral direction Y between the pair of rear slit regions RSr and RS1 is preferably larger than the two central slit regions MS adjacent in the lateral direction Y The gap d6 (refer to FIG. 6) in the lateral direction Y between the slits M1 and M1 is wider, and is wider than the lateral length of one area in the lateral center when the mid-height portion 43 is divided into 5 equal parts in the lateral direction Y. With this configuration, when the sanitary napkin 1 is worn, the part having the interval d1 (the central part of the lateral Y of the rear part R) is further stably along the wearer's gluteal groove, so that the conformability can be further improved. Even leakproof. The ratio of the interval d1 to the interval d6 in terms of the former/the latter is preferably 1.1 or more, more preferably 1.3 or more, and more preferably 3 or less, more preferably 2.5 or less. In addition, the ratio of the interval d1 to the lateral length of one region in the lateral center of the mid-high portion 43 is preferably 1.5 or more, more preferably 2 or more, and more preferably 6 or less, and more preferably 5 or less.

In FIG. 8, the main part of another embodiment of the absorbent article of this invention is shown. With regard to another embodiment described below, components that are different from the above-mentioned sanitary napkin 1 are mainly described, and the same components are denoted by the same reference numerals, and the description is omitted. The description of sanitary napkin 1 shall be applied to the components that are not specifically described.

In the sanitary napkin 1A shown in FIG. 8, the erection hindering portion 55 of the rear portion R is formed by including a plurality of strip-shaped fixing portions 57 obliquely crossing the elastic member 7 in a plan view. In the form shown in FIG. 8, one stand-up hindering portion 55 includes three strip-shaped fixing portions 57, and the three strip-shaped fixing portions 57 are intermittently arranged in the longitudinal direction X. Each strip-shaped fixing portion 57 has a quadrangular shape in plan view, and its length direction is not orthogonal to the elastic member 7 extending in the longitudinal direction X, but diagonally crosses. In addition, each belt-shaped fixing portion 57 has an inner edge portion (edge portion relatively close to the longitudinal center line CL) located on an outer edge portion (edge portion relatively close to the longitudinal center line CL) more forward in the longitudinal direction X The way to configure. The erection hindering portion 55 of the rear portion R includes such a plurality of strip-shaped fixing portions 57, which can improve the softness and flexibility of the leak-proof cuff 5 in the erected state without impairing the wearing feeling of the sanitary napkin 1. Followability to the body.

As mentioned above, although this invention was demonstrated, this invention is not limited to the above-mentioned embodiment, and can be changed suitably within the range which does not deviate from the summary of this invention. For example, in the above-mentioned embodiment, the absorber includes only the absorbent sheet, but it may include only the fiber accumulation in which the fibers of the absorbent material are piled, or may include both. In addition, the multilayer structure of the absorbent sheet in the absorbent body may be a structure in which one absorbent sheet is folded as in the above embodiment, or may be a structure in which a plurality of absorbent sheets are laminated without being folded , Or it can also be a combination of two components. It may also be a form obtained by appropriately changing, replacing, or combining the different configurations in the above-mentioned plural embodiments.

The present invention can be applied to all articles used for the absorption of body fluids such as menstrual blood, urine, feces, sweat, etc., and is particularly suitable for women's absorbent articles such as menstrual sanitary napkins, especially those worn at night. As an absorbent article for women, in addition to the menstrual sanitary napkins of the above-mentioned embodiment, for example, sanitary pads, incontinence pads, etc. can be cited. Regarding the embodiments of the present invention, the following appendices are further disclosed.

<1> An absorbent article which has a longitudinal direction corresponding to the front and back directions of the wearer and a transverse direction orthogonal to the longitudinal direction, and has a middle part containing an excretion part facing the wearer's excretion part when worn Part, a front part extending from the middle part to the longitudinal front, and a rear part extending from the middle part to the longitudinal rear, and having an absorbent body and one of both sides along the longitudinal direction arranged on the absorbent body For leak-proof cuffs, the absorbent body is provided with an absorbent body containing a water-absorbing material, a front sheet arranged on the skin facing side of the absorbent body, and a back face arranged on the non-skin facing side of the absorbent body A sheet, a pair of the above-mentioned leak-proof cuffs are each composed of a sheet for leak-proof cuffs, the sheet for leak-proof cuffs is fixed to the base end of another member, and the direction of the sheet for leak-proof cuffs The upright portion that stands up on the wearer's side, the upright portion includes an inner extension that extends from the base end inward in the lateral direction and is stretchable in the longitudinal direction, and is formed at the front portion and the rear portion, respectively There is an upright obstructing portion that fixes the inner extension portion to the front sheet. When wearing, the upright portion of the upright obstructing portion sandwiched between the longitudinal ends of the leak-proof cuff is the inner side The edge of the extension is a free end, and the free end stands up toward the wearer's skin side. In the erected state, the free end is located on the laterally inner side of the base end, and the absorbent body is located at the rear portion , Having a rear slit region arranged with a rear slit extending in the longitudinal direction, and the erection hindering portion of the rear part is located further longitudinally rearward than the longitudinal rear end of the rear slit region. <2> The absorbent article according to the above <1>, wherein a pair of the rear slit region is arranged on both sides of the imaginary vertical center line that bisects the absorber in the lateral direction and extends in the longitudinal direction. <3> The absorbent article of the above <1> or <2>, wherein the separation distance between the erection hindering portion and the longitudinal rear end of the rear slit area is 5.0% or more relative to the longitudinal length of the absorbent body , Preferably 6.25% or more, and 15% or less, preferably 12.5% or less. <4> The absorbent article as described in any one of <1> to <3>, wherein the separation distance between the standing hindering portion and the longitudinal rear end of the rear slit area is 15 mm or more, preferably 25 mm Above, and 60 mm or less, preferably 50 mm or less.

<5> The absorbent article according to any one of the above <1> to <4>, wherein the skin facing surface of the absorbent body is integrated as the front sheet and the absorber toward the back sheet side A pair of longitudinal grooves extending in the longitudinal direction are formed at a certain interval in the transverse direction, and the transverse grooves extending in the transverse direction are connected to the longitudinal rear ends of the pair of longitudinal grooves, and the rear part of the The erection hindering portion overlaps with the longitudinal front end of the horizontal groove, or is located more longitudinally rearward than the longitudinal front end of the horizontal groove. <6> The absorbent article according to the above <5>, wherein the longitudinal separation distance between the standing hindering portion and the longitudinal front end of the transverse groove is 35 mm or less, preferably 30 mm or less. <7> The absorbent article according to any one of the above <1> to <6>, wherein the absorptive main body has two longitudinal sides of the rear part along the longitudinal direction. The rear flap portion is formed by the members extending laterally outward from both side edges of the rear flap portion. On the non-skin facing surface of the rear flap portion, the rear flap portion is arranged to fix the rear flap portion to the wearer’s clothing. Fixed material, and The said stand-up hindering part of the said rear part is located more longitudinally rearward than the said rear flap part fixing material. <8> The absorbent article as described in the above <7>, wherein the longitudinal separation distance between the erection hindering portion and the rear flap fixing material is 10 mm or more, preferably 15 mm or more, and 40 mm or less, Preferably it is 35 mm or less. <9> The absorbent article according to any one of the above <1> to <8>, wherein the skin facing surface of the absorbent body is integrated as the front sheet and the absorbent body toward the back sheet side A pair of longitudinal grooves extending in the longitudinal direction are formed with a certain interval in the transverse direction, and the transverse grooves extending in the transverse direction are connected to the longitudinal rear ends of each of the pair of longitudinal grooves. The pair of longitudinal grooves respectively have a recessed portion or a split portion at the rear portion in a plan view, and a row of recessed portions is formed on the skin-facing surface of the absorbent body further longitudinally rearward than the horizontal grooves. The row of recesses is formed by disposing a plurality of recesses intermittently in one direction, and in a plan view, it has a curved shape protruding toward the longitudinal outside. The interval between adjacent recesses in the row of recesses is 5 mm or more. Compared with the horizontal groove, the row has a larger radius of curvature, and The upright obstructing portion of the rear portion is located between two imaginary straight lines, one of which imaginary straight line passes through the longitudinally rearmost one of the indented or divided portions of the longitudinal groove and extends in the lateral direction, Another imaginary straight line passes through the longitudinal rear end of the above-mentioned concave portion and extends in the transverse direction. <10> The absorbent article according to the above <9>, wherein the interval between the adjacent recesses in the row of recesses is 5 mm or more, preferably 7 mm or more, and 15 mm or less, preferably Below 13 mm. <11> The absorbent article as in the above <9> or <10>, wherein the non-skin facing surface of the absorbent body is intermittently arranged longitudinally to fix the absorbent body to the wearer’s clothing material.

<12> The absorbent article according to any one of the above <1> to <11>, wherein an elastic member is arranged in the edge area of the inner extension part, and the standing hindering part of the rear part is included in a plan view A plurality of strip-shaped fixing parts crossing obliquely with respect to the elastic member are formed. <13> The absorbent article according to any one of the above <1> to <12>, wherein the free end of the standing part of the standing blocking part sandwiched between the vertical ends of the leak-proof cuff The longitudinal length is shorter than that of the non-rising part of the leak-proof flange. <14> The absorbent article according to any one of the above <1> to <13>, wherein in the middle part, there is an area where the basis weight of the water-absorbent material is higher than that of the rear part. <15> The absorbent article according to any one of the above <1> to <14>, wherein the absorbent body has a central slit area arranged with a central slit extending in the longitudinal direction in the middle part, and the center The slit area is separated from the above-mentioned rear slit area in the longitudinal direction. <16> The absorbent article according to the above <15>, wherein between the central slit region and the rear slit region, the bending line used when bending the absorbent body extends in the lateral direction.

<17> The absorbent article according to any one of the above <1> to <16>, wherein the skin facing surface of the absorbent body is integrated as the front sheet and the absorbent body toward the back sheet side A recessed groove, a pair of longitudinal grooves extending in the longitudinal direction are formed at a specific interval in the transverse direction, and the transverse grooves extending in the transverse direction are connected to the longitudinal rear ends of each of the pair of longitudinal grooves, and Furthermore, on the skin-facing surface of the absorbent body, an inner groove is formed on the longitudinal inner side of the lateral groove of the rear portion, and the inner groove has a longitudinal groove extending in the longitudinal direction and a transverse groove extending in the transverse direction. unit. <18> The absorbent article according to the above <17>, wherein the inner groove is located at the longitudinal rear of the area surrounded by the vertical groove and the horizontal groove, compared to the area with a higher basis weight of the water-absorbent material. <19> The absorbent article of the above-mentioned <17> or <18>, wherein the longitudinal groove portion is formed as a pair with a specific interval in the transverse direction, and the transverse groove portion is connected to the longitudinal rear end of each of the pair of longitudinal groove portions The inner groove is symmetrically formed on the basis of a longitudinal center line that halves the absorbent article in the transverse direction and extends in the longitudinal direction, and The transverse groove portion is in a convex shape protruding toward the longitudinal outer side in a plan view, and the top of the protrusion is located on the longitudinal center line. <20> The absorbent article according to any one of the above <17> to <19>, wherein a row of depressions is formed on the skin-facing surface of the absorbent body further longitudinally rearward than the transverse grooves, and the depressions The row of recesses is formed by disposing a plurality of recesses intermittently in one direction, and in a plan view, it has a curved shape that protrudes toward the longitudinal outside. The distance between adjacent recesses in the row of recesses is more than 5 mm, and In the aforementioned rear portion, in terms of the radius of curvature, from the longitudinal front to the rear, the size relationship of the horizontal groove portion of the inner groove<the horizontal groove<the concave portion row holds true. <21> The absorbent article according to any one of the above <17> to <20>, wherein the rear end of the inner tank is positioned more longitudinally forward than the erection hindering part of the rear part. <22> The absorbent article according to any one of the above <17> to <21>, wherein the absorbent main body has two longitudinal sides of the rear part in the longitudinal direction including the absorbent article along the longitudinal direction. The rear flap portion is formed by the members extending laterally outward from both side edges of the rear flap portion. On the non-skin facing surface of the rear flap portion, the rear flap portion is arranged to fix the rear flap portion to the wearer’s clothing. Fixed material, and The said horizontal groove part is arrange|positioned so that it may overlap with the said rear wing part fixing material in a horizontal direction.

<23> The absorbent article according to any one of the above <1> to <22>, wherein the absorbent body comprises the following sheet: a central absorbent sheet, which faces the excretory part of the wearer when worn Configuration; and a main body absorbent sheet, which has a portion overlapping the central absorbent sheet in a plan view and a portion extending outward from the periphery of the central absorbent sheet. <24> The absorbent article according to the above <23>, wherein the central absorbent sheet and the main absorbent sheet each contain a hydrophilic fiber and a water-absorbing polymer. <25> The absorbent article of any one of the above <1> to <24>, which is a menstrual sanitary napkin with a longitudinal length of 27 cm or more. [Industrial availability]

According to the present invention, there is provided an absorbent article which is excellent in conformability to the crotch of the wearer and liquid leakage resistance.

1: Sanitary napkin 1A: Sanitary napkin 2: Front sheet 2S: Side edge 3: Back sheet 4: Absorber 4S: Side edge 5: Leak-proof flanging 6: Side sheet 7: Elastic member 8: longitudinal groove 9: Horizontal slot 9a: Longitudinal front 10: Absorbent body 10H: Rear wing section 10S: side flap 10W: Wing 11: Rear wing fixing material 12: Body fixing material 13: inner groove 13a: Longitudinal groove 13b: Horizontal groove 14: Depressed part 15: Depression row 41: Central absorbent sheet 42: body absorbent sheet 43: Middle and High 44: Standard Absorption Department 50: Base end 51: Upright 52: Inside extension 52a: margin 55: erect obstruction 56: End fixed part 57: Strip-shaped fixed part 80: Indentation 520: Margin area b1: width b2: width CFL: Central Fold Line CL: vertical centerline d1: interval d2: interval d3: interval d4: interval d5: interval d6: interval d7: separation distance F: Front FFL: Front fold line G1: separation distance G2: separation distance G3: separation distance L1: length L2: length M: middle part M1: Central slit MS: Central slit area P: Pocket structure R: Rear R1: Rear slit RFL: Rear folding line RS: Rear slit area RSl: rear slit area RSr: rear slit area V1: imaginary straight line V2: imaginary straight line X: portrait Y: horizontal

Fig. 1 is a plan view schematically showing the skin facing side (front sheet side) of a menstrual sanitary napkin as an embodiment of the absorbent article of the present invention. Fig. 2 is a plan view schematically showing the non-skin facing side (back sheet side) of the menstrual sanitary napkin shown in Fig. 1. Fig. 3 is a schematic cross-sectional view taken along the line I-I in Fig. 1. Fig. 4 is a schematic cross-sectional view taken along the line II-II in Fig. 1. Fig. 5 is a schematic cross-sectional view taken along the line III-III of Fig. 1. Fig. 6 is a plan view schematically showing the skin facing side of the absorber in the menstrual sanitary napkin shown in Fig. 1. Fig. 7 is a plan view schematically showing the skin facing side of the rear part of the menstrual napkin shown in Fig. 1 in an enlarged manner. Fig. 8 is a view corresponding to Fig. 7 in another embodiment of the absorbent article of the present invention.

1: Sanitary napkin

2: Front sheet

2S: Side edge

4: Absorber

4S: Side edge

5: Leak-proof flanging

6: Side sheet

7: Elastic member

8: longitudinal groove

9: Horizontal slot

10: Absorbent body

10H: Rear wing section

10S: side flap

10W: Wing

11: Rear wing fixing material

13: inner groove

13a: Longitudinal groove

13b: Horizontal groove

14: Depressed part

41: Central absorbent sheet

42: body absorbent sheet

43: Middle and High

44: Standard Absorption Department

50: Base end

51: Upright

52: Inside extension

55: erect obstruction

56: End fixed part

CFL: Central Fold Line

CL: vertical centerline

F: Front

FFL: Front fold line

G1: separation distance

M: middle part

M1: Central slit

MS: Central slit area

R: Rear

R1: Rear slit

RFL: Rear folding line

RS: Rear slit area

RSl: rear slit area

RSr: rear slit area

X: portrait

Y: horizontal

Claims (25)

An absorbent article having a longitudinal direction corresponding to the front and back directions of a wearer and a transverse direction orthogonal to the longitudinal direction, and having a middle portion including an excretion portion opposed to the wearer's excretion portion when worn, and The middle portion extends longitudinally forward, the front portion, and the longitudinal rearward portion from the middle portion, and The absorbent body is provided with an absorbent body and a pair of leak-proof cuffs arranged on both sides along the longitudinal direction of the absorbent body. The absorbent body is provided with an absorbent body containing a water-absorbent material and a skin facing the absorbent body. The front sheet on the front side and the back sheet on the non-skin facing side of the absorbent body, A pair of the above-mentioned leak-proof cuffs are each composed of a sheet for leak-proof cuffs, the sheet for leak-proof cuffs is fixed to the base end of other member, and the sheet for leak-proof cuffs is directed to the wearer side The upright part of the upright, The rising portion includes an inner extension portion extending inward in the lateral direction from the base end portion and having elasticity in the longitudinal direction, and The front part and the rear part are respectively formed with standing hindering parts for fixing the inner extension part to the front sheet, and When wearing, the upright part of the upright hindering part sandwiched between the two longitudinal ends of the leak-proof cuff has the edge of the inner extension part as a free end, and the free end faces the wearer's skin side Standing up, in the standing state, the free end is located more laterally inward than the base end, The absorbent body has a rear slit area arranged with a rear slit extending in the longitudinal direction in the rear portion, and The erection hindering portion of the rear portion is located more longitudinally rearward than the longitudinal rear end of the rear slit region. The absorbent article according to claim 1, wherein the rear slit region is arranged with a pair on both sides of the imaginary longitudinal center line that bisects the absorber in the lateral direction and extends in the longitudinal direction. The absorbent article of claim 1 or 2, wherein the separation distance between the standing hindering portion and the longitudinal rear end of the rear slit region is 5.0% or more and 15% or less relative to the longitudinal length of the absorbent body. The absorbent article of claim 1 or 2, wherein the separation distance between the erection hindering portion and the longitudinal rear end of the rear slit area is 15 mm or more and 60 mm or less. The absorbent article according to claim 1 or 2, wherein the skin-facing surface of the absorbent body is a groove formed by integrally recessing the front sheet and the absorbent body toward the back sheet side and extending in the longitudinal direction A pair of longitudinal grooves are formed at a specific interval in the transverse direction, and the transverse grooves extending in the transverse direction are connected to the longitudinal rear ends of each of the pair of longitudinal grooves, and The upright obstructing portion of the rear portion overlaps with the longitudinal front end of the horizontal groove, or is located more longitudinally rearward than the longitudinal front end of the horizontal groove. An absorbent article according to claim 5, wherein the longitudinal separation distance between the standing hindering portion and the longitudinal front end of the transverse groove is 35 mm or less. The absorbent article according to claim 1 or 2, wherein the two sides of the absorbent body along the longitudinal direction in the rear portion have a portion extending from both sides of the absorbent body along the longitudinal direction to the laterally outer side The rear flap portion formed by a member is provided with a rear flap portion fixing material for fixing the rear flap portion to the wearer's clothing on the non-skin facing surface of the rear flap portion, and The said stand-up hindering part of the said rear part is located more longitudinally rearward than the said rear flap part fixing material. The absorbent article of claim 7, wherein the longitudinal separation distance between the erection hindering part and the rear wing fixing material is 10 mm or more and 40 mm or less. The absorbent article according to claim 1 or 2, wherein the skin-facing surface of the absorbent body is a groove formed by integrally recessing the front sheet and the absorbent body toward the back sheet side and extending in the longitudinal direction A pair of longitudinal grooves are formed at a specific interval in the transverse direction, and the transverse grooves extending in the transverse direction are connected to the longitudinal rear ends of each of the pair of longitudinal grooves, The above-mentioned pair of longitudinal grooves respectively have a recessed part or a dividing part in the above-mentioned rear part in a plan view, In the skin facing surface of the absorbent body, a row of recesses is formed further longitudinally rearward than the transverse groove, and the row of recesses is formed by disposing a plurality of recesses intermittently in one direction and is facing the longitudinal outside in a plan view The convex curve shape, the interval between the adjacent concave parts in the concave part row is more than 5 mm, the concave part row has a larger radius of curvature than the horizontal groove, and The upright obstructing portion of the rear portion is located between two imaginary straight lines, one of which imaginary straight line passes through the longitudinally rearmost one of the indented or divided portions of the longitudinal groove and extends in the lateral direction, Another imaginary straight line passes through the longitudinal rear end of the above-mentioned concave portion and extends in the transverse direction. The absorbent article according to claim 9, wherein the interval between the adjacent recesses in the row of recesses is 5 mm or more and 15 mm or less. The absorbent article of claim 9, wherein a body fixing material for fixing the absorbent body to the wearer's clothing is intermittently arranged in the longitudinal direction on the non-skin facing surface of the absorbent body. An absorbent article according to claim 1 or 2, wherein an elastic member is arranged in the edge region of the inner extension portion, and the standing hindering portion of the rear portion includes a plurality of obliquely crossing the elastic member in a plan view A strip-shaped fixing part is formed. The absorbent article according to claim 1 or 2, wherein the longitudinal length of the free end of the standing portion of the standing obstructing portion sandwiched between the two longitudinal ends of the leak-proof cuff is compared with that of the leak-proof cuff The longitudinal length of the non-rising part of the side is shorter. The absorbent article of claim 1 or 2, wherein in the middle part, there is an area where the basis weight of the water-absorbent material is higher than that of the rear part. The absorbent article according to claim 1 or 2, wherein the absorbent body has a central slit area in the middle portion with a central slit extending in the longitudinal direction, and the central slit area and the rear slit area are Separate vertically. The absorbent article according to claim 15, wherein between the central slit area and the rear slit area, the bending line used when bending the absorbent body extends in the lateral direction. The absorbent article according to claim 1 or 2, wherein the skin-facing surface of the absorbent body is a groove formed by integrally recessing the front sheet and the absorbent body toward the back sheet side and extending in the longitudinal direction A pair of longitudinal grooves are formed at a specific interval in the transverse direction, and the transverse grooves extending in the transverse direction are connected to the longitudinal rear ends of each of the pair of longitudinal grooves, and Furthermore, on the skin-facing surface of the absorbent body, an inner groove is formed on the longitudinal inner side of the lateral groove of the rear portion, and the inner groove has a longitudinal groove extending in the longitudinal direction and a transverse groove extending in the transverse direction. unit. An absorbent article according to claim 17, wherein in the middle part, there is an area where the basis weight of the water-absorbing material is higher than that of the rear part, and The inner groove is located in the area surrounded by the vertical groove and the horizontal groove, and is located further to the longitudinal rear than the area with a higher basis weight of the water-absorbing material. The absorbent article of claim 17, wherein the longitudinal groove portion is formed as a pair with a specific interval in the lateral direction, the lateral groove portion is connected to the longitudinal rear end of each of the pair of longitudinal groove portions, and the inner groove is used to absorb Sexual articles are formed symmetrically on the basis of the longitudinal centerline extending in two halves in the horizontal direction, and The transverse groove portion is in a convex shape protruding toward the longitudinal outer side in a plan view, and the top of the protrusion is located on the longitudinal center line. An absorbent article according to claim 17, wherein a row of depressions is formed on the skin-facing surface of the absorbent body that is further longitudinally rearward than the transverse groove, and the row of depressions is intermittently arranged with a plurality of depressions in one direction It is formed and has a curved shape protruding toward the longitudinal outer side in a plan view, and the interval between adjacent recesses in the row of recesses is more than 5 mm, and In the aforementioned rear portion, in terms of the radius of curvature, from the longitudinal front to the rear, the size relationship of the horizontal groove portion of the inner groove<the horizontal groove<the concave portion row holds true. The absorbent article according to claim 17, wherein the rear end of the inner tank is positioned more longitudinally forward than the erection hindering portion of the rear portion. The absorbent article according to claim 17, wherein the absorbent body has members extending from both sides of the absorbent body along the longitudinal direction to the laterally outer side in the longitudinal sides of the rear portion, and The formed rear flap portion is provided with a rear flap portion fixing material for fixing the rear flap portion to the wearer's clothing on the non-skin facing surface of the rear flap portion, and The said horizontal groove part is arrange|positioned so that it may overlap with the said rear wing part fixing material in a horizontal direction. The absorbent article of claim 1 or 2, wherein the above-mentioned absorbent body comprises the following sheets: a central absorbent sheet, which is arranged facing the wearer’s excretion part when worn; and a body absorbent sheet, which It has a part overlapping with the central absorbent sheet in a plan view and a part extending outward from the periphery of the central absorbent sheet. The absorbent article according to claim 23, wherein the central absorbent sheet and the main absorbent sheet contain hydrophilic fibers and water-absorbent polymers, respectively. Such as the absorbent article of claim 1 or 2, which is a menstrual sanitary napkin with a longitudinal length of 27 cm or more.

Images