JP6306656B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

  The applicant firstly has a central slit region formed by dispersing vertical slits in the central part of the excretory part facing part of the absorber, and a rear slit extending in the lateral direction at the rear part of the absorber. An absorptive article having a rear slit region formed by being intermittently disposed on the surface is proposed (Patent Document 1). According to the absorbent article described in Patent Document 1, it is difficult for deep creases and twists to occur, the fit is improved, and the wearing feeling is improved.

  As a technique different from this, in Patent Document 2, in the use of the absorbent article, from the viewpoint of stabilizing the absorbent article by extending into a crack between the wearer's hips, An absorbent article is disclosed having an elongated through hole extending along a longitudinal centerline of the article.

JP 2015-23999 A JP 2005-512680 A

  When the present inventors take a posture with their bodies lying on their back at bedtime, in a general sanitary napkin for night use, there is a gap behind the excretory part facing part disposed opposite to the liquid excretion part of the wearer. It has been found that menstrual blood easily flows along the skin when a large amount of menstrual blood is excreted at a time and causes leakage. For such a leak, if the absorbent article described in Patent Document 1 is worn, the fit property is improved by the rear slit region. There may be a gap between the absorbent article and the skin due to a difference in rigidity between the portion and the portion between the middle and high portion and the rear slit constituting the rear slit region. There was room for improvement in the absorbent article.

  Moreover, if the absorbent article described in Patent Document 2 is worn, the rear area of the absorbent body is deformed into a shape bent from the through hole toward the wearer's skin when worn, giving the wearer a sense of incongruity. End up.

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

  The present invention has a longitudinal direction corresponding to the wearer's front-rear direction and a lateral direction perpendicular to the longitudinal direction, has an absorbent body, and has an absorptivity having a front part, an intermediate part, and a rear part along the longitudinal direction. It is an article, and the absorbent body has a middle-high part thicker than other parts on the skin facing surface side of the intermediate part, and the absorbent body is located on the rear side of the middle-high part, A rear slit region in which a rear slit extending in the vertical direction is disposed, and the rear slit region is paired on both sides with a virtual vertical center line extending in the vertical direction by dividing the absorber into the horizontal direction; Among the rear slits constituting the pair of rear slit regions, the lateral spacing between adjacent slits that are disposed closest to the middle-high portion and located in the innermost side in the lateral direction is , The lateral width of the rear end portion in the longitudinal direction in the middle and high portions Flip or wider than the width, it is to provide an absorbent article.

  According to the absorbent article of the present invention, the fit property is improved, the body fluid is difficult to flow along the skin, and the leak-proof property is improved.

FIG. 1 is a plan view of a sanitary napkin, which is a preferred embodiment of the absorbent article of the present invention, viewed from the skin facing surface side. 2 is a cross-sectional view schematically showing a cross section taken along line II-II in FIG. 3 is a cross-sectional view schematically showing a cross section taken along line III-III in FIG. FIG. 4 is a plan view of the absorbent body of the sanitary napkin shown in FIG. 1 as viewed from the skin facing surface side. FIG. 5: is the top view which looked at the absorber of another embodiment with which the absorbent article of this invention is provided from the skin opposing surface side.

  Hereinafter, an absorbent article of the present invention will be described with reference to the drawings based on a sanitary napkin 1 (hereinafter also referred to as “napkin 1”) which is a preferred embodiment thereof. The napkin 1 includes a longitudinal direction X corresponding to the wearer's front-rear direction and a lateral direction Y orthogonal to the longitudinal direction X, and has an absorbent body 4, along the longitudinal direction X, a front portion F, an intermediate portion M, and It has a rear portion R. The napkin 1 shown in FIGS. 1 to 3 is a night napkin suitable for use at bedtime. FIG. 1 shows a plan view of the napkin 1 as viewed from the skin facing surface side, and FIGS. 2 and 3 show sectional views of the napkin 1. Moreover, the top view which looked at the absorber 4 with which the napkin 1 is provided from the skin opposing surface side is shown by FIG.

  In this embodiment, the napkin 1 has the absorptive main body 10 which comprises the absorber 4, and the surface sheet 2 and the back surface sheet 3 which clamp the absorber 4, as shown in FIGS. . In other words, the absorbent main body 10 includes a liquid-permeable top sheet 2 that forms a skin facing surface, a back sheet 3 that forms a non-skin facing surface, and an absorbent body 4 interposed between the two sheets 2 and 3. It has. In this embodiment, the absorbent body 4 of the napkin 1 is formed from an absorbent sheet. Specifically, as shown in FIGS. 2 and 3, the absorbent sheet has a structure in which a plurality of layers are stacked in the thickness direction. It has become. In the napkin 1, the absorbent body 4 formed from the absorbent sheet contains a superabsorbent polymer and constituent fibers.

As shown in FIG. 1, the absorbent main body 10 of the napkin 1 is worn more than the intermediate portion M including an excretory portion-facing portion disposed opposite to the vaginal opening which is the excretory portion of the wearer when worn. It has the front part F distribute | arranged near a wearer's front side, and the rear part R distribute | arranged near this wearer's rear side rather than this intermediate part M, and has a shape long in the front-back direction. The napkin 1 and the absorbent main body 10 have a longitudinal direction X corresponding to the wearer's front-rear direction, a lateral direction Y orthogonal to the longitudinal direction X, and a thickness direction Z. That is, the absorptive main body 10 has the front part F, the intermediate part M, and the rear part R along the vertical direction X which is the front-back direction, and is divided in this order.
The napkin 1 is symmetrical with respect to the vertical center line CL, which is a virtual bisector extending in the vertical direction X passing through the horizontal direction Y center of the napkin 1.

  Moreover, in this specification, a skin opposing surface is a surface in the napkin 1 or its component (for example, surface sheet 2) orient | assigned to a wearer's skin side at the time of wear of the napkin 1, and a non-skin opposing surface is a napkin. 1 or a component thereof, which is a surface directed to the side opposite to the skin side (clothing side) when the napkin 1 is worn. Further, the longitudinal direction X coincides with the longitudinal direction of the napkin 1 and the absorbent main body 10, and the lateral direction Y coincides with the width direction (direction orthogonal to the longitudinal direction) of the napkin 1 and the absorbent main body 10.

  In the present embodiment, as shown in FIGS. 1 and 3, the napkin 1 is provided on the rear portion R of the absorbent main body 10, which is behind the intermediate portion M, in addition to the absorbent main body 10. A pair of rear flap portions 10H, 10H extending outward in the lateral direction Y from each of both side portions along the longitudinal direction X are provided. Moreover, in the napkin 1, as shown in FIG.1 and FIG.2, a pair of wing part 10W extended outward of the horizontal direction Y from each side part along the vertical direction X of the intermediate part M in the absorptive main body 10, 10W.

  In the absorbent article of the present invention, the intermediate portion M is a region having the wing portion 10W in the longitudinal direction X (one wing portion 10W) when the wing portion 10W is provided like the napkin 1 of the present embodiment. The area between the base along the vertical direction X and the root along the vertical direction X of the other wing 10W. Further, in the case of an absorbent article that does not have a wing portion, a folding curve (not shown) that crosses the absorbent article in the transverse direction Y that occurs when the absorbent article is folded into an individual form, It means a region surrounded by a first folding line and a second folding line as counted from the front end in the longitudinal direction X of the absorbent article.

  In the napkin 1 of this embodiment, the surface sheet 2 has coat | covered the whole region of the skin opposing surface of the absorber 4, as shown in FIGS. On the other hand, the back sheet 3 covers the whole area of the non-skin facing surface of the absorbent body 4, and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the top sheet 2. A side flap portion 10 </ b> S is formed together with the forming sheet 5. The leak-proof cuff forming sheet 5 and the back sheet 3 fixed to the skin-facing surface of the top sheet 2 are adhesives, heat seals, ultrasonic waves at the extended portions from both ends in the longitudinal direction X of the absorber 4. They are joined together by a known joining means such as a seal. In addition, between each of the top sheet 2 and the back sheet 3 and the absorbent body 4 may be joined by an adhesive.

  In the napkin 1, the leak-proof cuff forming sheet 5 includes both side portions along the longitudinal direction X in the skin facing surface of the top sheet 2 arranged on the skin facing surface of the absorbent main body 10, as shown in FIGS. It is arranged and fixed. Preferably, the leak-proof cuff forming sheet 5 is arranged and fixed over the entire length in the longitudinal direction X of the absorbent main body 10 so as to overlap both left and right side portions along the longitudinal direction X of the absorbent body 4 in plan view. ing. For example, the leakage preventing cuff forming sheet 5 may be provided with an elastic member for forming a leakage preventing cuff inside a folded portion formed by folding back the free end portion. When the leak-proof cuff forming elastic member is arranged in this way, a leak-proof cuff is formed in which the folded portion rises toward the wearer's skin due to the contraction force of the leak-proof cuff forming elastic member. . When the leak-proof cuff is formed in this way, it is possible to prevent side leakage of menstrual blood excreted on the skin facing surface.

  In the napkin 1, as shown in FIG. 1, the side flap part 10S is greatly projecting outward in the lateral direction Y at the intermediate part M, and thereby on the left and right sides along the longitudinal direction X of the absorbent main body 10. A pair of wing portions 10W and 10W are extended. Further, as shown in FIG. 1, the side flap portion 10 </ b> S projects greatly outward in the lateral direction Y at the rear portion R, and thereby a pair of side flap portions 10 </ b> S is provided on both the left and right sides along the longitudinal direction X of the absorbent main body 10. The rear flap portions 10H, 10H are extended.

  The wing portion 10W is used by being folded back to the non-skin facing surface side of the crotch portion of clothes such as shorts. In the napkin 1, the wing portion 10 </ b> W has a substantially trapezoidal shape in which a lower base (a side longer than the upper base) is located on a side portion along the longitudinal direction X of the absorbent main body 10 in a plan view as illustrated in FIG. 1. It has a shape. On the non-skin facing surface of the wing portion 10W, there is disposed a wing portion adhesive portion 10W1 which is a slippage preventing member for fixing the wing portion 10W (napkin 1) to clothes (not shown) such as shorts. The wing portion 10W folded back to the non-skin facing surface (outer surface) side of the crotch portion of the clothes can be adhesively fixed to the crotch portion by the partial adhesive portion 10W1. The wing adhesive section 10W1 is arranged to extend in the vertical direction X. In the napkin 1, the shape of the wing adhesive portion 10W1 is a rectangular shape that is long in the vertical direction X, and extends parallel to the vertical center line CL. Moreover, the main body adhesion part (not shown) for fixing the absorptive main body 10 to clothes, such as shorts, is also formed in the non-skin opposing surface of the absorptive main body 10.

  The rear flap 10H is arranged on the skin facing surface side of clothing such as shorts when worn. On the non-skin facing surface of the rear flap portion 10H, a rear flap portion adhesive portion 10H1, which is a slip stopper member for fixing the rear flap portion 10H to clothes (not shown) such as shorts, is disposed. The rear flap portion 10H can be adhesively fixed on the skin-facing surface (inner surface) of the clothing during use by the partial adhesive portion 10H1. The rear flap adhesive section 10H1 is arranged so as to extend in the vertical direction X. In the napkin 1, the shape of the rear flap adhesive section 10H1 is a rectangular shape that is long in the vertical direction X, and extends parallel to the vertical center line CL.

  As shown in FIGS. 1 to 3, the napkin 1 includes a top sheet 2 and a back sheet 3 that sandwich the absorber 4, and the back surface in which the top sheet 2 and the absorber 4 are integrated with the skin facing surface. A groove 9 having a bottom is provided on the sheet 3 side. Specifically, a linear groove in which the topsheet 2 and the absorbent body 4 are integrally recessed toward the backsheet 3 side on the skin facing surface of the absorbent main body 10 (skin facing surface of the topsheet 2). 9 is provided. Therefore, the groove 9 is a groove in which the density of each of the constituent members is higher than the density of the peripheral portion of the groove with respect to the top sheet 2 and the absorbent body 4. “Linear” in the linear groove 9 means that the shape of the groove (concave portion) is not limited to a straight line in a plan view but includes a curved line. Each line may be a continuous line or a discontinuous line such as a broken line. For example, the groove | channel 9 may be comprised from the row | line | column which many discontinuous point embosses make.

  In the napkin 1, as shown in FIG. 1, the groove 9 includes a first lateral pressing groove 91 extending in the lateral direction Y at each of the front part F and the rear part R, and both sides of the napkin 1 in the longitudinal direction X. The part has a vertical squeezing groove 92 extending in the longitudinal direction X across the front part F, the intermediate part M, and the rear part R. In the napkin 1, the 1st horizontal pressing groove 91 of the front part F and the back part R is extended in the horizontal direction Y, forming the convex curvilinear shape toward the vertical direction X outward. In the napkin 1, the first lateral pressing groove 91 in the front portion F, the one vertical pressing groove 92, the first horizontal pressing groove 91 in the rear portion R, and the other vertical pressing groove 92 are connected to form a ring-shaped circumferential groove. Forming. Further, in the napkin 1, the groove 9 has a second lateral pressing groove 93 extending in the lateral direction Y inward of the first lateral pressing groove 91 of the front portion F in the longitudinal direction X. Further, in the napkin 1, the groove 9 is the rear portion R, and the vertical direction X is within the region surrounded by the pair of vertical pressing grooves 92, 92 and the first lateral pressing groove 91 in the rear portion R. It has the 3rd pressing groove 94 extended while forming the convex curve shape toward outward. In addition, in the napkin 1, although the 2nd horizontal pressing groove 93 and the 3rd pressing groove 94 are not connected with a pair of vertical pressing grooves 92 and 92, as shown in FIG. 1, they may be connected. The grooves 9 formed in this way can effectively prevent liquid leakage from the periphery of the napkin 1 by suppressing diffusion of body fluid flowing in the plane direction on the top sheet 2.

  The absorbent body included in the absorbent article of the present invention has a middle-high portion having a thickness greater than that of other portions on the skin facing surface side of the intermediate portion M. In the napkin 1 of the present embodiment, the absorbent body 4 is formed of an absorbent sheet as shown in FIGS. 1 and 2, and specifically, a structure in which the absorbent sheet overlaps with a plurality of thickness directions Z. It has become. In the napkin 1, the absorbent body 4 formed from the absorbent sheet contains a superabsorbent polymer and constituent fibers. One absorbent sheet constituting the absorbent body 4 has a superabsorbent polymer and constituent fibers that are three-dimensionally distributed. As the absorbent sheet, the adhesive force generated in the wet superabsorbent polymer or a binder such as an adhesive or adhesive fiber added separately, between the constituent fibers or between the superabsorbent polymer and the constituent fibers. Those formed into a sheet form by bonding can be preferably used. In addition, an absorptive sheet | seat is an absorber currently shape | molded by the sheet form, and is generally distinguished from the absorbent body of the pile type structure which piled up the absorptive material. Typical examples of the absorbent sheet include those described in Japanese Patent No. 2963647 and those described in Japanese Patent No. 2955223.

  In the napkin 1, the absorbent body 4 has a multilayer structure formed of an absorbent sheet, as shown in FIGS. Here, the formed multilayer structure may be formed by overlapping a plurality of absorbent sheets, or may be formed by folding a single absorbent sheet. However, it may be formed by combining these. In the napkin 1, the absorbent body 4 is composed of a central absorbent sheet 42 formed of an absorbent sheet at the intermediate portion M and a main body absorbent sheet 41 covering the central absorbent sheet 42, as shown in FIG. ing. That is, the absorbent body 4 of the napkin 1 is formed with a multilayer structure including the main body absorbent sheet 41 and the central absorbent sheet 42, and the middle and high portions 43 are formed in the intermediate portion M. The multilayer structure of the absorbent body 4 of the napkin 1 has a structure in which a central absorbent sheet 42 is included inside a folded structure of one main body absorbent sheet 41, and the central absorbent sheet 42 is formed in the middle-high portion 43. It is arranged.

  Preferably, in the napkin 1, as shown in FIGS. 1 to 3, the main body absorbent sheet 41 is composed of a single sheet having a length (width) in the lateral direction Y longer than that of the napkin 1, and the main body absorbent sheet 41 The two side portions along the longitudinal direction X of the adhesive sheet 41 are folded back to the back sheet 3 side to form a two-layer structure, and both side edges along the longitudinal direction X are overlapped at the center in the lateral direction Y, The outer shape is formed. The central absorbent sheet 42 is composed of one sheet having a rectangular shape in plan view, and has a three-layer structure in which the central absorbent sheet 42 is folded in three in the lateral direction Y. When the central absorbent sheet 42 has a three-layer structure, in the two fold lines crossing the central absorbent sheet 42 in the longitudinal direction X, the second fold line counted from the free end in the lateral direction Y is used. Bend to the back sheet 3 side, and then bend to the top sheet 2 side at the first fold line counted from the free end in the lateral direction Y so that the free end in the lateral direction Y is arranged inside the three-layer structure Fold it in a spiral. Thus, the central absorbent sheet 42 has a three-layer structure that is folded into three in a spiral shape. The middle-high portion 43 is formed in a five-layer structure by sandwiching a central absorbent sheet 42 having a three-layer structure between main absorbent sheets 41 having a two-layer structure. The middle and high portions 43 are formed only in the intermediate portion M, and are not formed in the front portion F and the rear portion R. As shown in FIGS. 2 and 3, the number of laminated absorbent sheets constituting the absorber 4 around the middle and high portions 43 is two, whereas the absorbent sheet constituting the absorber 4 in the middle and high portions 43. The number of stacked layers is 5 and the number of stacked layers is large, and the thickness is larger than the periphery of the middle-high portion 43. For this reason, the middle-high part 43 is a raised part protruding from the top sheet 2 side (the skin facing surface side of the napkin 1) at the intermediate part M.

  The thickness per absorbent sheet is preferably 0.1 mm or more, particularly 0.3 mm or more, and preferably 2 mm or less, particularly 1.5 mm or less. More specifically, it is 0.1 mm or more and 2 mm or less, particularly 0.3 mm or more and 1.5 mm or less, and the absorbent article 4 absorbs menstrual blood spotwise and obtains an absorbent article having a good wearing feeling. It is preferable from the point.

  The absorber 4 has a thickness at the middle-high portion 43 of preferably 0.7 mm or more, more preferably 1 mm or more, preferably 5 mm or less, more preferably 4 mm or less, more specifically preferably It is 0.7 mm or more and 5 mm or less, More preferably, it is 1 mm or more and 4 mm or less. By making the thickness of the middle-high portion 43 in such a range, it becomes easy to achieve both a good wearing feeling and high absorption performance in the middle portion M where the middle-high portion 43 is formed. Moreover, when the absorbent article is provided with a wing part like the napkin 1 of this embodiment, it becomes easy to suppress the deflection | deviation of the absorber in the intermediate part M at the time of mounting | wearing. Further, the thickness of the absorber around the middle-high portion 43 other than the middle-high portion 43 is preferably 0.3 mm or more, more preferably 0.5 mm or more, and preferably 3 mm or less, more preferably 2. More specifically, it is preferably 0.3 mm or more and 3 mm or less, and more preferably 0.5 mm or more and 2.5 mm or less. This range is preferable from the viewpoint of enhancing the high absorption performance and the ability to follow the wearer's movement. In addition, the thickness of an absorber and an absorptive sheet is measured by the following method.

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

  The absorbent body included in the absorbent article of the present invention has a rear slit region RS in which a rear slit R <b> 1 extending in the vertical direction X is disposed on the rear side in the vertical direction X with respect to the middle-high portion 43. A pair of rear slit regions RS are arranged on both sides of a longitudinal center line CL that is a virtual longitudinal center line extending in the longitudinal direction X by dividing the absorber 4 into two in the lateral direction Y. In the napkin 1 of the present embodiment, the absorbent body 4 includes a pair of rear slits separated in the lateral direction Y on the rear side in the longitudinal direction X with respect to the middle and high portions 43 of the intermediate part M, as shown in FIGS. The regions RSr, RSl are provided, and each of the rear slit regions RSr, RSl has a rear slit R1 extending in the vertical direction X. Here, the shape of the rear slit R1 extending in the vertical direction X means not only a straight line but also a wavy line, a curve, a broken line, and the like as long as it extends in the vertical direction X. Further, the inclination angle of the rear slit R1 extending in the vertical direction X is not only the slit extending in parallel to the vertical center line CL extending in the vertical direction X but also an angle formed by a virtual line extending in parallel to the vertical center line CL. Includes slits that are less than 1 degree. However, the inclination angle of the rear slit R1 is preferably less than 30 degrees, particularly preferably less than 10 degrees, and most preferably 0 degrees. Each rear slit region RS preferably has at least one such rear slit R1, more preferably 2 or more and 18 or less, and more preferably 4 or more and 14 or less. It is particularly preferred. When each rear slit region RS has a plurality of rear slits R1, the shape and the inclination angle of the rear slit R1 may all be the same slit, may include some different slits, and are all different. It may be a slit. When each rear slit region RS has a plurality of rear slits R1, it is preferable that each rear slit region RS has two or more slit rows extending in the vertical direction X in the horizontal direction Y. Three or more rows are more preferable. Further, the number of rear slits R1 included in each slit row is preferably one or more, more preferably two or more. In the napkin 1, as shown in FIG. 4, in each rear slit region RS, three rows of slits extending in the vertical direction X are formed in the horizontal direction Y, and the rear slits R1 included in each of the slit rows are arranged. The number is two. In the napkin 1, the slit row arranged between the two slit rows is arranged closer to the middle high portion 43 side of the absorber 4 than the two slit rows to form the rear slit region RS.

  In the napkin 1, as shown in FIGS. 1 and 4, the rear slits R1 constituting each of the pair of rear slit regions RSr and RSl are arranged symmetrically with respect to the longitudinal center line CL so as to be paired with the pair of rear slit regions RSr. , RSl. In the napkin 1, each rear slit region RS has a plurality of rear slits R1 having the same shape and the same inclination angle. In the napkin 1, each rear slit R1 extends in a straight line parallel to the longitudinal center line CL. In the napkin 1, rear slits R1 extending linearly parallel to the vertical center line CL are arranged in a state of being distributed in both the vertical direction X and the horizontal direction Y, thereby forming a rear slit region RS. The rear slit R <b> 1 of the napkin 1 is disposed on the main body absorbent sheet 41 located around the middle-high portion 43 in the absorbent body 4. The rear slit R1 only needs to penetrate at least one layer of the main body absorbent sheet 41 having a two-layer structure. However, in the napkin 1, the main body absorbent sheet 41 having a two-layer structure is entirely extended in the thickness direction Z. The layer penetrates.

  In the napkin 1, as shown in FIG. 1, among the rear slits R <b> 1 constituting the pair of rear slit regions RSr and RS <b> 1, the napkin 1 is arranged at a position closest to the middle-high portion 43 and is most inward in the lateral direction Y. The distance d1 between the pair of adjacent slits R1ar and R1al in the horizontal direction Y is equal to or wider than the width b3 in the horizontal direction Y of the rear end portion 43B of the vertical direction X in the middle-high portion 43. ing. Here, among the rear slits R1 constituting each rear slit region RS, the pair of proximity slits arranged at positions closest to the middle-high portion 43 is, in other words, located at the most front side among the rear slits, These are a pair of slits that are separated in the direction Y. Further, the distance d2 between the pair of rear slits R1r, R1l means the shortest distance in the horizontal direction Y between the pair of rear slits R1r, R1l.

  In the napkin 1, as shown in FIG.1 and FIG.4, since the middle-high part 43 is provided in the intermediate part M of the absorber 4, the fit property to a liquid excretion part of a wearer improves. In the napkin 1, the distance d1 between the pair of adjacent slits R1ar and R1al arranged in the absorber 4 in the lateral direction Y is the same as or wider than the width b3 of the rear end 43B of the middle and high portions 43. It has become. Therefore, even if the body is turned upside down at bedtime, a pair of adjacent slit regions RSar in the absorber 4 starts from the pair of adjacent slits R1ar and R1al by applying force from both sides of the napkin 1. , The part between RSal is easily raised on the wearer side. As described above, when the portion between the pair of adjacent slit regions RSar and RSal is raised in a curved shape on the wearer side, it is difficult to give the wearer a sense of incongruity, but a gap is hardly generated between the skin and the result. As a result, the fit is improved, the body fluid is less likely to flow along the skin, and the leak-proof property is improved. From the viewpoint of further achieving such an effect, it is preferable that the distance d1 between the pair of adjacent slits R1ar and R1al in the lateral direction Y is wider than the width b3 of the rear end portion 43B of the middle-high portion 43.

From the viewpoint of further achieving the above effect, the width b1 (see FIG. 4) when the rear slit R1 is viewed in plan is preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 1 mm or less. 8 mm or less is more preferable, 0.1 mm or more and 1 mm or less are preferable, and 0.2 mm or more and 0.8 mm or less are more preferable. From the same viewpoint, the length (vertical X length) L1 (see FIG. 4) when the rear slit R1 is viewed in plan is preferably 10 mm or more, more preferably 15 mm or more, and preferably 35 mm or less. More preferably, it is 25 mm or less, preferably 10 mm or more and 35 mm or less, more preferably 15 mm or more and 25 mm or less.
From the viewpoint of further achieving the above effect, when there are a plurality of rear slits R1 in each of the rear slit regions RSr and RSl, the distance (width direction distance) d3 between the rear slits R1 and R1 closest to the lateral direction Y is preferably 3 mm. More preferably, it is 5 mm or more, preferably 18 mm or less, more preferably 15 mm or less, preferably 3 mm or more and 18 mm or less, more preferably 5 mm or more and 15 mm or less.

  In the napkin 1, the rear slits R1r and R1l located on the innermost side in the lateral direction Y of each of the pair of rear slit regions RSr and RSl have a width in the lateral direction Y of the rear end portion of the longitudinal direction X in the middle-high portion 43 of 5 It is located on the outer side in the lateral direction Y from the central one region when equally divided. For this reason, the above-described effects are more easily exhibited. Further, the distance Y2 (see FIG. 1) between the pair of rear slits R1r and R1l arranged at the position where the distance in the horizontal direction Y is the narrowest is the distance between the rear end portion 43B of the vertical direction X in the middle-high portion 43. The width of the center 1 region when the width in the horizontal direction Y is equally divided into five is preferably larger, and the width of the center 1 region when the width in the horizontal direction Y of the rear end portion 43B of the middle-high portion 43 is equally divided into three. More preferably, it is wider. When a plurality of rear slits R1 constituting each rear slit region RS are arranged, the pair of rear slits R1r and R1l arranged at the position where the interval in the lateral direction Y is the narrowest is a pair of adjacent slits R1ar. , R1al are preferably different slits, and the distance d2 (see FIG. 1) between the pair of rear slits R1r, R1l is narrower than the distance d1 between the pair of adjacent slits R1ar, R1al (see FIG. 1). It is preferable. The distance d2 (see FIG. 1) between the pair of rear slits R1r and R1l means the shortest distance in the lateral direction Y between the pair of rear slits R1r and R1l.

  In the napkin 1, since the middle-high portion 43 is formed by the rectangular central absorbent sheet 42, the width b3 in the lateral direction Y of the middle-high portion 43 is constant. On the other hand, when the width of the rear end portion of the middle and high portion 43 is smaller in the lateral direction Y than the front side, the distance between the pair of adjacent slits R1ar and R1al in the lateral direction Y is the middle height. It is preferable that the length is equal to or greater than the maximum length in the lateral direction Y in the rearmost rearmost division when the portion 43 is divided into five in the vertical direction X, and two from the rear side adjacent to the rearmost division. It is preferably equal to or wider than the maximum length in the lateral direction Y in the adjacent divided area of the eye. Here, the “maximum length in the lateral direction Y” means a distance at a position that is longest in the lateral direction Y when the middle and high portions 43 are viewed in plan. By doing in this way, the effect mentioned above becomes still easier to be exhibited.

  Further, in the napkin 1, the distance in the lateral direction Y between the rear slits R1r and R1l adjacent to the lateral direction Y, which is located on the innermost side in the lateral direction Y of each of the pair of rear slit regions RSr and RSl, is in the lateral direction Y. It is longer than the distance in the lateral direction Y between the adjacent central slits M1, M1. For this reason, the middle-high portion 43 is easily deformed along the intermediate portion M, but the rear portion R is easily deformed so as to buffer the influence of the deformation. Therefore, the effects described above are more easily exhibited.

From the viewpoint of further achieving the above effect, the distance d1 (see FIG. 1) between the pair of adjacent slits R1ar and R1al is preferably 25 mm or more, more preferably 30 mm or more, and preferably 55 mm or less, more preferably 45 mm or less. Yes, and preferably 25 mm or more and 55 mm or less, more preferably 30 mm or more and 45 mm or less.
From the viewpoint of further achieving the above effects, when the pair of rear slits R1l, R1r and the pair of adjacent slits R1ar, R1al arranged at the position where the distance in the lateral direction Y is the narrowest are different, the pair of rear slits R1r, R1l The distance d2 (see FIG. 1) is preferably 8 mm or more, more preferably 15 mm or more, preferably 40 mm or less, more preferably 30 mm or less, and preferably 8 mm or more and 40 mm or less, more preferably 15 mm or more and 30 mm. It is as follows.

  Further, in the napkin 1, as shown in FIGS. 1 and 4, in addition to the pair of rear slit regions RSr and RS1, a central slit M1 extending in the vertical direction X in the middle and high portions 43 is dispersed in the vertical direction X and the horizontal direction Y. The central slit region MS is arranged. Here, the central slit M1 extending in the vertical direction X is similar to the rear slit R1 extending in the vertical direction X described above, and the shape thereof is not only a straight line but also a wavy line, broken line, The inclination angle includes not only a slit extending parallel to the longitudinal center line CL extending in the longitudinal direction X but also an angle formed by a virtual line extending parallel to the longitudinal center line CL is less than 45 degrees. The meaning also includes a slit. However, the inclination angle is preferably less than 30 degrees, particularly preferably less than 10 degrees, and most preferably 0 degrees. The central slit region MS preferably has 10 or more and 40 or less, more preferably 20 or more and 30 or less such central slits M1. In the central slit region MS, it is preferable that three or more slit rows in which the central slit M1 extending in the vertical direction X is intermittently arranged in the horizontal direction Y are formed in the vertical direction X, and more than four rows are more preferable. Preferably, 5 or more rows are more preferable. Further, the number of central slits M1 included in each slit row is preferably 2 or more, more preferably 3 or more. The plurality of central slits M1 constituting the central slit region MS may have the same shape and inclination angle, may include partially different slits, or may be different slits.

  In the napkin 1, the rear slit R <b> 1 constituting each rear slit region RS has a portion that overlaps the groove 9 in plan view as shown in FIG. 1. Preferably, in the napkin 1, a part of the plurality of rear slits R <b> 1 constituting each rear slit region RS is a vertical compressed groove 92 or a third compressed groove 94 disposed in the rear part R configuring the groove 9. It has an overlapping part. When the rear slit R1 has a portion overlapping the groove 9, the fit of the napkin 1 is further improved by the synergistic effect of the groove 9 and the rear slit R1. Further, when the rear slit R1 has a portion overlapping the groove 9, the topsheet 2 easily enters the absorber 4 from the rear slit R1 in the overlapping portion, and the body fluid flowing on the topsheet 2 is absorbed by the absorber 4. Easy to absorb.

  In the napkin 1, each rear flap portion 10H has a rear flap portion adhesive portion 10H1 that is a shift preventing member extending in the longitudinal direction X on the non-skin facing surface. As shown in FIG. 1, the rear slit R1 constituting each rear slit region RS is not arranged behind the rear end portion in the longitudinal direction X of the rear flap portion adhesive portion 10H1 in plan view. In other words, in the napkin 1, the rear end portion of the rear slit R1 located at the rearmost in the vertical direction X among the plurality of rear slits R1 constituting each rear slit region RS is the vertical direction of the rear flap portion adhesive portion 10H1. It is located in front of the rear end of X in the vertical direction X. When the rear slit R1 constituting the rear slit region RS is arranged at such a position, when the napkin is deformed along the wearer's body, the rear flap portion 10H is shorted via the rear flap portion adhesive portion 10H1. Therefore, the occurrence of wrinkles due to the rear slit R1 is suppressed, and leakage prevention is improved.

  In the napkin 1, as shown in FIG. 1 and FIG. 4, in addition to the pair of rear slit regions RS, central slits M1 extending in the vertical direction X are distributed in the vertical direction X and the horizontal direction Y in the middle and high portions 43. And a central slit region MS. For this reason, the central slit region MS is easily deformed along the wearer's body by the central slit M1, and the fitting property of the napkin 1 is improved, and the leakage prevention and the wearing feeling are further improved.

From the viewpoint of further achieving the above effects, the width b2 (see FIG. 4) when the central slit M1 is viewed in plan is preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 1 mm or less. 8 mm or less is more preferable, 0.1 mm or more and 1 mm or less are preferable, and 0.2 mm or more and 0.8 mm or less are more preferable.
From the standpoint of further achieving the above effects, the length (vertical X length) L2 (see FIG. 4) when the central slit M1 is viewed in plan is preferably 10 mm or more, more preferably 15 mm or more, and preferably Is 35 mm or less, more preferably 25 mm or less, preferably 10 mm or more and 35 mm or less, more preferably 15 mm or more and 25 mm or less.
From the standpoint of further achieving the above effects, the distance (widthwise direction interval) d4 between the closest central slits M1, M1 is preferably 3 mm or more, more preferably 7 mm or more, and preferably 20 mm or less, more preferably 15 mm or less. And preferably 3 mm to 20 mm, more preferably 7 mm to 15 mm.

  In the napkin 1, as shown in FIGS. 1 and 4, a central slit M <b> 1 extending in parallel with the longitudinal center line CL is formed in both the longitudinal direction X and the lateral direction Y in the middle-high part 43 of the intermediate part M of the absorber 4. A central slit region MS is formed by being distributed symmetrically with respect to the vertical center line CL. The central slit M1 of the napkin 1 is at least one of the five-layered absorbent sheets (the two-layered main body absorbent sheet 41 and the three-layered central absorbent sheet 42) constituting the middle-high portion 43 of the absorbent body 4. Although it is only necessary to penetrate one layer, the napkin 1 penetrates the absorbent sheet having a five-layer structure through the entire layer in the thickness direction.

  Moreover, like the napkin 1 shown in FIG.1 and FIG.4, when the absorber 4 has a pair of back slit area | region RS and center slit area | region MS, on the rear end part 43B of the vertical direction X of the middle-high part 43 Judgment as to whether the slit arranged in is the rear slit R1 constituting the rear slit region RS or the central slit M1 constituting the central slit region MS is made as follows. That is, when the absorber 4 is viewed in plan, the overall length in the longitudinal direction X of the slit to be determined based on the imaginary line IL parallel to the lateral direction Y passing through the rearmost end 43B of the longitudinal direction X of the middle-high portion 43. When the ratio ((BL / AL) × 100) of the length (BL) in the vertical direction X of the overlapping portion of the slit with the rear end portion 43B of the middle-high portion 43 in (AL) is 10% or less It is determined as the rear slit R1 constituting the rear slit region RS, and when larger than 10%, it is determined as the central slit M1 constituting the central slit region MS.

Moreover, in the napkin 1, as shown in FIG.1 and FIG.4, among the center slits M1 which comprise the center slit area | region MS, it is located in the width direction (lateral direction Y) center side of the center slit area | region MS, and is the most vertical direction. The rear end of the central rearmost slit M1a located on the rear side of X and the front end of the proximity slit R1a of each rear slit region RS do not overlap when the napkin 1 is viewed from the lateral direction Y. The distance d5 (see FIG. 4) in the vertical direction X between the rear end of the central rearmost slit M1a and the front end of the proximity slit R1a is preferably 20 mm or less, more preferably 15 mm or less, and preferably 0 mm or more. It is 20 mm or less, More preferably, it is 0 mm or more and 15 mm or less. If it is this range, the part between a pair of proximity slits R1ar and CR1al in the absorber 4 will be worn from the pair of proximity slits R1ar and R1al by applying force from both sides of the napkin 1 during wearing. It is easier to protrude in a curved shape on the person side.
A distance d5 (see FIG. 4) in the vertical direction X between the rear end of the central rearmost slit M1a and the front end of the proximity slit R1a is the length (vertical X length) L1 of the rear slit R1 (see FIG. 4). And it is preferable that it is shorter than at least one of the length (vertical direction X length) L2 (refer FIG. 4) of the center slit M1.

The formation material of each structural member of the napkin 1 of this embodiment mentioned above is demonstrated.
As the top sheet 2 and the back sheet 3, various kinds of materials conventionally used for absorbent articles such as sanitary napkins can be used without particular limitation. For example, as the surface sheet 2, a single layer or multilayer nonwoven fabric, an apertured film, or the like can be used. Moreover, as the back surface sheet 3, a moisture-permeable resin film etc. can be used. Moreover, as the sheet for forming a leak-proof cuff, a water-repellent nonwoven fabric having high water pressure resistance, such as a spunbond nonwoven fabric, a spunbond-meltblown-spunbond laminated nonwoven fabric, or the like can be used.

  As the superabsorbent polymer that the absorbent body 4 has, a particulate polymer is generally used, but a fibrous polymer may be used. When the particulate superabsorbent polymer is used, the shape thereof may be any of a spherical shape, a block shape, a bowl shape, and an amorphous shape. As the superabsorbent polymer, generally, a polymer or copolymer of acrylic acid or an alkali metal acrylate can be used. Examples thereof include polyacrylic acid and salts thereof and polymethacrylic acid and salts thereof. As the polyacrylate and polymethacrylate, sodium salts can be preferably used. In addition, acrylic acid or methacrylic acid, maleic acid, itaconic acid, acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, 2- (meth) acryloylethanesulfonic acid, 2-hydroxyethyl (meth) acrylate, styrenesulfonic acid, etc. It is also possible to use a copolymer obtained by copolymerizing the above-mentioned comonomer within a range that does not deteriorate the performance of the superabsorbent polymer.

  Examples of the constituent fibers of the absorbent body 4 include synthetic fibers and cellulosic fibers. As a synthetic fiber, it is preferable that it is a thermoplastic fiber, for example. For example, the thermoplastic fiber is formed using a single fiber formed using a single synthetic resin such as polyethylene, polypropylene, polyester, polyurethane, or a synthetic resin such as a composite of two or more of these. A composite fiber is mentioned. Examples of the cellulosic fibers include crosslinked cellulose fibers (pulp fibers) obtained by crosslinking cellulose molecules between or between molecules with an appropriate crosslinking agent, or regenerated cellulose fibers such as rayon fibers having improved cellulose crystallinity. It is done.

In the napkin 1, it is preferable that an adhesive is applied and fixed between the top sheet 2 and the absorber 4 and between the absorber 4 and the back sheet 3. The adhesive can be applied using a known means such as a slot coat gun, a spiral spray gun, a spray gun, or a dot gun. In the napkin 1, the adhesive can be applied in a spiral shape using a spiral spray gun. preferable. As the adhesive to be applied, for example, a hot melt adhesive is preferably used. The application amount of the hot melt adhesive is preferably 1.5 g / m ² or more and 10 g / m ² or less.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, the absorbent article of this invention is not restrict | limited to the napkin 1 of the said embodiment at all, and can be changed suitably.
For example, in the napkin 1, as shown in FIG. 4, in each rear slit region RS of the absorber 4, three slit rows extending in the vertical direction X are formed in the horizontal direction Y. Although the number of rear slits R1 included is two, as in the absorber 4 shown in FIG. 5, in each rear slit region RS, three slit rows extending in the vertical direction X are formed in the horizontal direction Y. The number of the rear slits R1 included in the central slit row is two, and the number of the rear slits R1 included in the both side slit rows entering both sides of the central slit row is one. About the absorber 4 shown in FIG. 5, the different structure part from the napkin 1 mentioned above is mainly demonstrated, the same code | symbol is attached | subjected to the same structure part, and description is abbreviate | omitted. The description of the absorbent body 4 shown in FIG. If it is the sanitary napkin which has the absorber 4 shown in FIG. 5, the effect similar to the napkin 1 shown in FIG. 1 will be show | played.

  Moreover, in the napkin 1, as shown in FIG. 3, although the absorber 4 is formed from the absorptive sheet, it is not an absorptive sheet, but the skin opposing surface of the absorptive core containing the piled pulp fiber and It may be a pile-type absorber in which the non-skin facing surface is covered with a core wrap sheet.

  The absorbent article of the present invention may be a sanitary napkin, a panty liner (clay sheet), or the like.

  The following absorbent article is disclosed further regarding embodiment of this invention mentioned above.

<1>
An absorbent article having a longitudinal direction corresponding to the longitudinal direction of the wearer and a lateral direction perpendicular to the longitudinal direction, having an absorbent body, and having a front part, an intermediate part, and a rear part along the longitudinal direction. The absorbent body has a middle-high part thicker than other parts on the skin-facing surface side of the intermediate part, and the absorbent body is rearward of the middle-high part, in the longitudinal direction. A rear slit region in which an extended rear slit is disposed, and the rear slit region is arranged on both sides across a virtual vertical center line extending in the vertical direction by dividing the absorber into the horizontal direction. , Among the rear slits constituting the pair of rear slit regions, the lateral spacing between the adjacent slits that are disposed closest to the middle-high portion and located closest to the inner side in the lateral direction is the middle-high portion. Equal to or equal to the lateral width of the longitudinal rear end of Wider than the width, the absorbent article.
<2>
The absorptive article according to <1>, wherein a distance between the adjacent slits in the horizontal direction is equal to or wider than a maximum length in one horizontal direction on the rearmost side when the middle-high portion is divided into five in the vertical direction. .
<3>
The absorber according to <1> or <2>, wherein the absorber has a central slit region in which central slits extending in the vertical direction are arranged in the vertical direction and the horizontal direction in the middle and high portions. Sex goods.
<4>
Among the central slits constituting the central slit region, the rear end of the central rearmost slit located on the rearmost side, and the front end of the proximity slit of each rear slit region, the absorbent article from the lateral direction The absorbent article according to <3>, which does not overlap when viewed.
<5>
The lateral distance between the laterally adjacent rear slits located on the innermost side in the lateral direction of each of the pair of rear slit regions is greater than the lateral distance Y between the central slits adjacent in the lateral direction. The absorbent article according to <3> or <4>, which is long.
<6>
The rear slit located at the innermost side in the horizontal direction of each of the pair of rear slit regions is more lateral than the central one region when the horizontal width of the rear end portion in the vertical direction at the middle and high portions is divided into five equal parts. The absorbent article according to any one of the above items <1> to <5>, which is located outside the surface.
<7>
The absorbent article includes a top sheet and a back sheet sandwiching the absorber, and includes a groove having a bottom on the back sheet side in which the top sheet and the absorber are integrated on a skin facing surface. In any one of the above items <1> to <6>, the rear slit constituting each of the rear slit regions has a portion overlapping the groove when the absorbent article is viewed in plan view. The absorbent article as described.
<8>
The absorbent article has an absorbent main body comprising the absorbent body, and a front sheet and a back sheet sandwiching the absorbent body, and behind the intermediate portion of the absorbent main body, Each of the rear flaps has a pair of rear flaps extending outward in the lateral direction from both sides along the vertical direction. Then, when the absorbent article is viewed in plan, the rear slits constituting each of the rear slit regions are not arranged behind the longitudinal rear end of the misalignment stopping member, <1> to The absorbent article according to any one of <7>.
<9>
The absorbent article according to any one of <1> to <8>, wherein the shape of the rear slit is a straight line, a wavy line, a curved line, or a broken line.
<10>
Any one of the above items <1> to <9>, wherein an angle formed by the virtual longitudinal center line extending in parallel with the longitudinal direction of the rear slit is less than 45 degrees, preferably less than 30 degrees, and more preferably less than 10 degrees. 2. The absorbent article according to 1.
<11>
The absorbent article according to any one of <1> to <10>, wherein the rear slit extends along a longitudinal direction.
<12>
The absorption according to any one of <1> to <11>, wherein in each of the rear slit regions, there are preferably two or more slit rows extending in the vertical direction, more preferably three or more rows in the horizontal direction. Sex goods.
<13>
In each of the rear slit regions, there are preferably two or more slit rows extending in the vertical direction, more preferably three or more rows in the horizontal direction, and preferably one rear slit is included in each of the slit rows. As described above, the absorbent article according to any one of <1> to <12>, more preferably two or more.
<14>
The width | variety when the said back slit is planarly viewed is 0.1 mm or more and 1 mm or less, Preferably it is 0.2 mm or more and 0.8 mm or less, Absorbent article in any one of said <1>-<13> .
<15>
The absorbent article according to any one of <1> to <14>, wherein a length in a longitudinal direction when the rear slit is viewed in plan is 10 mm or more and 35 mm or less, preferably 15 mm or more and 25 mm or less.
<16>
When there are a plurality of the rear slits in each of the pair of rear slit regions, the lateral distance between the rear slits closest to the lateral direction is 3 mm or more and 18 mm or less, preferably 5 mm or more and 15 mm or less, <1> to The absorbent article according to any one of <15>.
<17>
The absorber has a central slit region in which the central slits extending in the vertical direction are distributed in the vertical direction and the horizontal direction in the middle and high portions, and among the central slits constituting the central slit region, The rear end of the central rearmost slit located at the center side in the horizontal direction of the central slit region and the rearmost in the vertical direction does not overlap with the front end of the proximity slit when viewed from the side, <1 The absorbent article according to any one of> to <16>.
<18>
Any one of the above items <1> to <17>, wherein a vertical interval between a rear end of the central rearmost slit and a front end of the proximity slit is 0 mm or more and 20 mm or less, preferably 0 mm or more and 15 mm or less. Absorbent article as described in 1.
<19>
The absorbent article according to any one of <1> to <18>, wherein the absorbent body has a multilayer structure formed of an absorbent sheet.
<20>
The absorber has a multilayer structure formed of an absorbent sheet, and the multilayer structure is formed by stacking a plurality of the absorbent sheets, or formed by folding a single absorbent sheet. The absorbent article according to any one of <1> to <19>, wherein
<21>
The absorbent body is composed of a central absorbent sheet formed of an absorbent sheet in the intermediate portion, and a main body absorbent sheet covering the central absorbent sheet, and the central absorbent sheet is formed in the middle and high portions. The absorbent article according to any one of <1> to <20>, which is arranged.
<22>
The absorbent article according to any one of <1> to <21>, wherein the absorber has a thickness of 0.7 mm to 5 mm, preferably 1 mm to 4 mm in the middle and high portions.
<23>
Any one of the items <1> to <22>, wherein the absorber has a thickness in a peripheral portion of the middle and high part other than the middle and high part of 0.3 to 3 mm, preferably 0.5 to 2.5 mm. 2. The absorbent article according to 1.
<24>
The absorbent article according to any one of <1> to <23>, wherein the absorbent article is a sanitary napkin.

  Hereinafter, the absorptive article of the present invention is explained still in detail by an example. However, the scope of the present invention is not limited by the examples.

<Example 1>
A sanitary napkin having the same basic structure as the sanitary napkin shown in FIGS. 1 to 3 having the absorbent body shown in FIG. 4 was prepared, and this was used as a sample of Example 1. As the surface sheet, a spunbonded nonwoven fabric having a basis weight of 25 g / m ² was used. As the back sheet, a moisture-permeable resin film having a basis weight of 35 g / m ² was used. A spunbonded nonwoven fabric having a basis weight of 25 g / m ² was used as the leak-proof cuff forming sheet. As an absorptive sheet which comprises an absorber, it created according to Example 2 of patent 2963647. The thickness per absorbent sheet was 0.5 mm, the thickness at the middle and high parts of the absorbent body was 2.3 mm, and the lateral width of the rear end of the middle and high parts was 35 mm. Note that the middle and high portions were rectangular.

The details of the slits arranged in the absorber are as follows.
Regarding the rear slit R1 constituting each rear slit region RS, the width b1 is 0.5 mm, the length L1 is 20 mm, and the distance d3 between the nearest rear slits R1 and R1 is 7 mm.
The distance d1 between the pair of adjacent slits R1ar and R1al was 38 mm, and the distance d2 between the pair of rear slits R1r and R1l was 24 mm.
Regarding the central slit M1 constituting the central slit region MS, the width b2 is 0.5 mm, the length L2 is 20 mm, and the distance d4 between the closest central slits M1 and M1 is 6 mm.
The distance d5 in the vertical direction X between the rear end of the central rearmost slit M1a and the front end of the proximity slit R1a was 0 mm.

<Example 2>
A sanitary napkin having the same basic configuration as that of the sample created in Example 1 except that the absorbent shown in FIG. 5 is used instead of the absorbent shown in FIG. It was. The details of the slits arranged in the absorber shown in FIG. 5 are as follows.
The distance d1 between the pair of adjacent slits R1ar and R1al arranged in the absorber in the lateral direction Y was 35 mm which was the same as the width b1 of the rear end portion 43B, with the middle-high portion 43 having a rectangular shape.
Regarding the rear slit R1 constituting each rear slit region RS, the width b1 is 0.5 mm, the length L1 is 20 mm, and the distance d2 between the nearest rear slits R1 and R1 is 7 mm.
The distance d1 between the pair of adjacent slits R1ar and R1al was 38 mm, and the distance d2 between the pair of rear slits R1r and R1l was 24 mm.
Regarding the central slit M1 constituting the central slit region MS, the width b2 is 0.5 mm, the length L2 is 20 mm, and the distance d4 between the closest central slits M1 and M1 is 6 mm.
The distance d5 in the vertical direction X between the rear end of the central rearmost slit M1a and the front end of the proximity slit R1a was 0 mm.

<Comparative Example 1>
4 except that the absorbent body shown in FIG. 4 except for the pair of rear slit regions RS is used instead of the absorbent body shown in FIG. A napkin was prepared and used as a sample of Comparative Example 1.

[Evaluation]
About the sample (Sanitary napkin) of Examples 1-2 and the sample (Sanitary napkin) of Comparative Example 1, the spread distance of the pseudo blood in the vertical direction was measured by the following method. The results are shown in Table 1 below.

<Method for measuring the spread distance of pseudo blood in the vertical direction>
A human body model for the lower body of a woman capable of injecting liquid from the excretion point was used, and after placing the sample to be evaluated with the model upright, the model was placed on its back. Next, using a liquid discharge pump with a speed adjusting function, 3.0 g of pseudo blood (horse blood) was injected every minute from the excretion point, and a total of 6 g and 9 g were injected. One minute after the 6g injection, the sample was removed from the model, and the longitudinal diffusion distance in each of the surface sheet and the absorber produced in the sample by the injection of pseudo blood (horse blood) was measured three times, and the average value thereof Is the spread distance of pseudo blood (horse blood) in the vertical direction. In any of the surface sheet and the absorbent body, the shorter the spreading distance of this bodily fluid, the less the gap between the sanitary napkin and the wearer's skin, and it is considered that the bodily fluid is less likely to flow through the skin. It becomes evaluation.
In addition, defibrinated horse blood (manufactured by Nippon Biotest Co., Ltd.) was used as suspicious blood.

  As shown in Table 1, the sanitary napkins of Examples 1 and 2 were compared to the sanitary napkin of Comparative Example 1 in the longitudinal distance of pseudo blood (horse blood) in the top sheet and the pseudo blood in the absorber. It was found that the spread distance in the vertical direction of (horse blood) was small. From these things, compared with the sanitary napkin of Examples 1-2, the sanitary napkin of Examples 1-2 is hard to produce a space | gap between skin during wearing, fit property improves, and a bodily fluid is transmitted to skin. Therefore, it can be expected that leakage resistance will be improved.

1 Sanitary napkin (absorbent article)
DESCRIPTION OF SYMBOLS 10 Absorbent main body 2 Top sheet 3 Back sheet 4 Absorber 41 Main body absorbent sheet 42 Central absorbent sheet 43 Middle-high part 5 Leak-proof cuff forming sheet RS Rear slit region R1 Rear slit MS Central slit region M1 Central slit 9 Groove F Front part M Middle part R Rear part

Claims (8)

An absorbent article having a longitudinal direction corresponding to the longitudinal direction of the wearer and a lateral direction perpendicular to the longitudinal direction, having an absorbent body, and having a front part, an intermediate part, and a rear part along the longitudinal direction. ,
The absorbent body has a middle-high portion thicker than other portions on the skin facing surface side of the intermediate portion,
The absorber has a rear slit region in which a rear slit extending in the longitudinal direction is arranged on the rear side of the middle and high part, and the rear slit region bisects the absorber in the lateral direction in the longitudinal direction. Are arranged on both sides across a virtual vertical center line extending to
Among the rear slits constituting the pair of rear slit regions, the lateral distance between adjacent slits that are disposed closest to the middle-high portion and located in the innermost side in the lateral direction is the middle-high portion. An absorbent article having a width equal to or wider than the width in the lateral direction of the rear end portion in the vertical direction.   2. The absorption according to claim 1, wherein a distance between the adjacent slits in the horizontal direction is equal to or greater than a maximum horizontal length in the rearmost rearmost division when the middle and high portions are divided in the vertical direction. Sex goods.   The absorptive article according to claim 1 or 2 in which said absorber has a central slit field where central slits extending in the vertical direction are distributed in the vertical and horizontal directions in said middle and high portions.   Among the central slits constituting the central slit region, the rear end of the central rearmost slit located on the rearmost side, and the front end of the proximity slit of each rear slit region, the absorbent article from the lateral direction The absorptive article according to claim 3 which does not overlap visually.   The lateral distance between the laterally adjacent rear slits located on the innermost side in the lateral direction of each of the pair of rear slit regions is longer than the lateral distance between the central slits adjacent in the lateral direction. The absorbent article according to claim 3 or 4.   The rear slit located at the innermost side in the horizontal direction of each of the pair of rear slit regions is more lateral than the central one region when the horizontal width of the rear end portion in the vertical direction at the middle and high portions is divided into five equal parts. The absorbent article of any one of Claims 1-5 located in the outer side of. The absorbent article includes a top sheet and a back sheet sandwiching the absorber, and includes a groove having a bottom on the back sheet side in which the top sheet and the absorber are integrated on a skin facing surface. ,
The absorptive article given in any 1 paragraph of Claims 1-6 in which said back slit which constitutes each said back slit field has a part which overlaps with said slot in planar view of said absorptive article. . The absorbent article has an absorbent main body comprising the absorbent body, and a front sheet and a back sheet sandwiching the absorbent body, and behind the intermediate portion of the absorbent main body, It has a pair of rear flaps extending outward in the lateral direction from each of both sides along the vertical direction,
Each of the rear flaps has a displacement preventing member extending in the longitudinal direction on the non-skin facing surface,
Any one of Claims 1-7 in which the said back slit which comprises each said back slit area | region in planar view of the said absorbent article is not distribute | arranged back rather than the rear-end part of the vertical direction of the said slip prevention member. The absorbent article of Claim 1.

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