JP2018007705A - Sanitary absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sanitary absorbent article which can quickly absorb discharged menstrual blood and which causes less stickiness in a part contacting a wearer's skin.SOLUTION: A sanitary absorbent article 1 comprises: an absorbent core 40 having an excretion part facing part B to be positioned opposite an excretion part of a wearer and including a high absorbent polymer; and surface layers 2, 5 arranged on a position closer to a skin of a wearer than the absorbent core 40. The surface layers 2, 5 comprise a plurality of open holes 20 through the surface layers in a thickness direction, and the absorbent core 40 has a plurality of recess parts 42 having an opening in the skin facing surface. In plan view, at least some of the open holes 20 of the surface layers 2, 5 overlap at least some of the recess parts 42 of the absorbent core 40. A hemagglutination agent 10 is present in a position closer to a skin of a wearer than the absorbent core 40.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sanitary absorbent article used for absorption of menstrual blood.

  As a typical configuration of a sanitary absorbent article used for menstruation such as a sanitary napkin, an absorbent body including an absorbent material such as a fiber material or a superabsorbent polymer, and a skin of the wearer than the absorbent body What comprises surface layers, such as a surface sheet arrange | positioned in the near position, is known. In the sanitary absorbent article having such a configuration, for the purpose of increasing the absorbability of excretory fluid such as menstrual blood, the surface layer and further the absorption layer, a recess or a through hole having an opening on the skin facing surface thereof. It has been conventionally performed. For example, in Patent Document 1, a plurality of cutting openings are formed in a surface sheet, and a cut piece that defines the cutting opening is bent to the absorber side and formed on the skin-facing surface of the absorber. A configuration is described in which it penetrates and covers the sides of the recesses of the absorber. In the configuration described in Patent Document 1, a laminate of a topsheet and an absorbent body is embossed from the topsheet side, the topsheet is partially cut to form broken pieces, and the broken pieces are absorbed into the absorbent body. According to Patent Document 1, it is said that the sanitary absorbent article does not become hard even if it has such a recess by embossing. Patent Document 1 also describes that a blood slipperiness-imparting agent is applied around the cutting opening of the topsheet, thereby improving menstrual transfer from the topsheet to the absorber. ing.

  A sanitary absorbent article has high menstrual blood absorption performance, and it is desired that menstrual blood excreted on the topsheet is quickly absorbed by the absorbent body inside the article. However, menstrual menstrual blood may contain components such as endometrium, and is difficult to absorb because it has a higher viscosity than urine, which is the main absorption target of disposable diapers. Blood is not absorbed and remains on the top sheet, which may give the wearer a sticky feeling.

  Regarding a technique related to menstrual blood absorption performance, a technique for improving the menstrual blood absorption performance of an absorbent article by applying a cationic polymer material to the absorbent article is known. For example, Patent Document 2 describes a personal care absorbent article such as a napkin or tampon that includes a porous nonwoven web material treated with a treatment agent that clumps or dissolves red blood cells in blood. . In this document, a polycation material which is a strongly positively charged polymer is used as the treatment agent. This treatment agent aggregates or dissolves red blood cells in the blood when the blood enters or passes through the absorbent article. Patent Document 3 describes an absorbent article to which a blood gelling agent containing a copolymer having a maleic anhydride group is applied. These blood modifying agents are usually applied to a surface sheet or a member farther away from the wearer's skin, such as an absorbent body, in an absorbent article.

JP 2014-68957 A Special table 2002-528232 gazette JP-A-57-153648

  By applying a blood modifying agent as described in Patent Documents 2 and 3 to a sanitary absorbent article having a depression or through-hole formed in the surface layer or absorption layer as described in Patent Document 1, It is expected that the blood absorption rate is further improved. Such a combination of techniques is not described in Patent Documents 1 to 3. In particular, a blood modifying agent having the property of aggregating non-liquid components such as erythrocytes contained in menstrual blood is considered to be effective in improving the absorption rate of menstrual blood. Is not appropriate, not only can the absorption rate be improved, but also the aggregate of red blood cells produced by the blood modifying agent may inhibit the absorption of menstrual blood, which may reduce the absorption rate. is there.

  The subject of this invention is related with providing the sanitary absorbent article which can absorb the excreted menstrual blood quickly, and there is little stickiness of the part which contact | connects a wearer's skin.

  The present invention has a longitudinal direction corresponding to the longitudinal direction of the wearer and a lateral direction perpendicular to the longitudinal direction, and has an excretion part facing part disposed to face the excretion part of the wearer, and includes a superabsorbent polymer. A sanitary absorbent article comprising an absorbent core and a surface layer disposed closer to the wearer's skin than the absorbent core, wherein the surface layer penetrates the surface layer in the thickness direction. A plurality of indentations or through-holes are formed, and the absorbent core is formed with a plurality of depressions or through-holes having openings on the skin-facing surface of the absorbent core. At least a part of the plurality of cuts or through-holes in the surface layer and at least a part of the plurality of indentations or through-holes in the absorbent core are overlapped, and the wearer's wearer than the absorbent core. Physiology where hemagglutinating agent is present at a position close to the skin It is to provide an absorbent article.

  ADVANTAGE OF THE INVENTION According to this invention, the sanitary absorbent article which can absorb rapidly the excreted menstrual blood and there is little stickiness of the part which contact | connects a wearer's skin is provided.

FIG. 1 is a plan view schematically showing a skin facing surface side (surface sheet side) of an example of a sanitary napkin that is an embodiment of the sanitary absorbent article of the present invention. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. FIG. 3 is a cross-sectional view schematically showing a part of FIG. 2 (a surface layer and a recessed portion of the absorbent core) in an enlarged manner. FIG. 4 is a schematic diagram showing a menstrual blood absorption mechanism in the sanitary absorbent article of the present invention. Fig.5 (a) and FIG.5 (b) are the schematic diagrams which show the absorption mechanism of the menstrual blood in the conventional sanitary absorbent article. FIG. 6 is a view corresponding to FIG. 3 of a main part of another embodiment of the sanitary absorbent article of the present invention. Fig.7 (a)-FIG.7 (d) are each FIG. 3 equivalent views of the principal part of further another embodiment of the sanitary absorbent article of this invention. FIG. 8 is a view corresponding to FIG. 3 of a main part of still another embodiment of the sanitary absorbent article. FIG. 9 is a perspective view schematically showing the skin facing surface side of the absorbent core shown in FIG. 8. It is FIG. 3 equivalent view of the principal part of further another embodiment of the sanitary absorbent article.

  Hereinafter, the sanitary absorbent article of the present invention will be described based on preferred embodiments with reference to the drawings. 1 and 2 show a sanitary napkin 1 which is an embodiment of the sanitary absorbent article of the present invention. As shown in FIG. 1, the napkin 1 corresponds to the wearer's front-rear direction, and has a longitudinal direction X extending from the wearer's abdominal side to the back side through the crotch portion, and a transverse direction Y orthogonal thereto. In addition, the front portion A, the excretory portion facing portion B, and the rear portion C are provided in the vertical direction X. The excretory part facing part B is a part where the excretion part (such as the vaginal opening) of the wearer is opposed to the central part in the lateral direction Y, and the front part A is more worn by the wearer than the excretion part facing part B. The rear portion C is a portion disposed on the back side of the wearer, that is, the rear side, rather than the excretory portion facing portion B.

  As shown in FIG. 1, the napkin 1 has an absorbent main body 6 that is long in the vertical direction and outwards in the lateral direction Y from both side portions along the vertical direction X of the excretory part-facing portion B of the absorbent main body 6. A pair of extending wings 6W, 6W is provided. When the absorbent article has a wing part like the napkin 1, the excretion part opposing part in the absorbent article of the present invention has a wing part in the longitudinal direction (longitudinal direction, X direction in the figure) of the absorbent article. If the napkin 1 is taken as an example, it is a region sandwiched between the root along the longitudinal direction X of one wing portion 6W and the root along the longitudinal direction X of the other wing portion 6W. Moreover, the excretion part opposing part in the absorbent article which does not have a wing part is a transverse direction (width direction, Y in a figure) which arises when this absorbent article is folded by the trifold individual packaging form. With respect to two fold lines (not shown) crossing in the direction), it means a region surrounded by a first fold curve and a second fold curve as counted from the front end in the longitudinal direction of the absorbent article.

  The absorptive main body 6 includes a 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 both sheets 2 and 3. The absorptive main body 6 is divided into three areas of the front part A, the excretory part opposing part B, and the rear part C in order from the wearer's stomach side in the longitudinal direction X. The longitudinal direction X coincides with the longitudinal direction of the napkin 1 and the absorbent main body 6, and the lateral direction Y coincides with the width direction orthogonal to the longitudinal direction of the napkin 1 and the absorbent main body 6.

  In the present specification, the “skin facing surface” is a surface of the absorbent article or its constituent member (for example, the absorbent body 4) that is directed toward the wearer's skin when the absorbent article is worn, that is, relative to the wearer's skin. The side close to the skin, and the “non-skin facing surface” is directed toward the side opposite to the skin side when the absorbent article is worn, that is, the side relatively distant from the wearer's skin. It is the surface to be. In addition, "at the time of wearing" here means a state where a normal proper wearing position, that is, a correct wearing position of the absorbent article is maintained, and the absorbent article is in a state of being deviated from the wearing position. Is not included.

  As shown in FIG. 2, the absorbent body 4 includes a liquid-retaining absorbent core 40 and a hydrophilic core wrap sheet 41 that covers the skin-facing surface of the absorbent core 40. The absorbent core 40 has a single-layer structure and has a shape that is long in the longitudinal direction X in plan view as shown in FIG. 1. Therefore, the longitudinal direction of the absorbent core 40 is the same as the longitudinal direction X of the napkin 1. The width direction of the absorbent core 40 is the same direction as the lateral direction Y of the napkin 1. The core wrap sheet 41 is a single continuous liquid permeable sheet having a width that is not less than 2 times and not more than 3 times the length of the absorbent core 40 in the transverse direction Y. As shown in FIG. 40 that covers the entire area of the skin facing surface 40 and extends outward from both side edges along the longitudinal direction X of the absorbent core 40 in the lateral direction Y, and the extended portion is wound down below the absorbent core 40 Thus, the entire area of the non-skin facing surface of the absorbent core 40 is covered. Here, “the entire region is covered” means that the core wrap sheet 41 arranged over the entire surface of the absorbent core 40 covering surface (skin facing surface or non-skin facing surface) is 1) the core wrap sheet. 41 includes a form in which the entire surface of the covering surface is covered evenly, and 2) a form in which the core wrap sheet 41 has a rupture portion, and the covering surface is not covered with the core wrap sheet 41 in the rupture portion. . Specifically, in the form of 2), for example, as shown in FIGS. 2 and 3, the core wrap sheet 41 disposed over the entire skin-facing surface of the absorbent core 40 is a dent described later of the absorbent core 40. In the form where the portion 42 is formed, a through hole is formed as a fracture portion, and the recessed portion 42 is not covered with the core wrap sheet 41 in the through hole. Moreover, the form shown in FIG. 8 to be described later can be included in the form 1).

  The core wrap sheet may not be such a single sheet. For example, one skin side core wrap sheet that covers the skin facing surface of the absorbent core 40 and the skin side core wrap sheet are: It may be configured separately and including one non-skin-side core wrap sheet that covers the non-skin facing surface of the absorbent core 40. The absorbent core 40 and the core wrap sheet 41 are joined by a known joining means such as a hot-melt adhesive.

  The absorbent core 40 is a fiber assembly in which absorbent materials such as hydrophilic fibers and superabsorbent polymers are stacked, and can be manufactured according to a conventional method using a known stacking device. The hydrophilic fibers that form the main body of the absorbent core 40 include those obtained by hydrophilizing an inherently hydrophobic fiber, represented by chemical fibers, and an essentially hydrophilic fiber, represented by wood pulp. These can be used alone or in combination of two or more.

  The absorbent core 40 further contains a superabsorbent polymer in addition to the hydrophilic fibers. As the superabsorbent polymer contained in the absorbent core 40, 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.

  As shown in FIG. 2, the top sheet 2 covers the entire skin facing surface of the absorbent body 4, and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4. On the other hand, the back sheet 3 covers the entire area of the non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4. A side flap portion 6S is formed together with a side seat 7 to be described later at an outward position in the lateral direction Y from the extended portions from both side edges of the four. The back sheet 3 and the side sheet 7 are joined to each other by known joining means such as an adhesive, heat seal, ultrasonic seal, and the like at the extended portions from both side edges along the longitudinal direction X of the absorber 4. Moreover, the surface sheet 2 and the back surface sheet 3 are joined to each other by a known joining means at the extending portions from both ends in the longitudinal direction X of the absorber 4. The top sheet 2 and the back sheet 3 may be bonded to the absorber 4 with an adhesive. 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. As the back sheet 3, a moisture-permeable resin film or the like can be used.

  As shown in FIG. 1, the side flap portion 6 </ b> S greatly protrudes outward in the lateral direction Y at the excretory portion-facing portion B, whereby a pair of side flap portions 6 </ b> S is provided on both the left and right sides along the longitudinal direction X of the absorbent main body 6. Wings 6W, 6W are extended. The wing portion 6W has a substantially trapezoidal shape in which the lower base (side longer than the upper base) is positioned inward in the lateral direction Y of the napkin 1 than the upper base in a plan view as shown in FIG. A wing adhesive portion (not shown) for fixing the wing 6W to clothes such as shorts is formed on the non-skin facing surface. The wing portion 6W is used by being folded back to the non-skin facing surface (outer surface) side of the crotch portion of clothes such as shorts. The wing adhesive section is covered with a release sheet (not shown) made of a film, nonwoven fabric, paper, or the like before use.

In the present embodiment, the absorbent main body 6 includes a second sheet 5. Specifically, as shown in FIG. 2, a liquid-permeable second sheet 5 is disposed between the top sheet 2 and the absorber 4. The second sheet 5 is a constituent member of a sanitary absorbent article that is also referred to as a sublayer sheet in the present technical field. The second sheet 5 is improved in the liquid permeability from the top sheet 2 to the absorbent body 4 and the liquid absorbed in the absorbent body 4. It plays a role of reducing liquid return to the top sheet 2. The second sheet 5 together with the surface sheet 2 constitutes a “surface layer arranged closer to the wearer's skin than the absorbent core 40”, and the surface layer is arranged in the order closer to the absorbent core 40. And the surface sheet 2. In the present embodiment, the second sheet 5 covers substantially the entire skin facing surface of the absorbent body 4. As the second sheet 5, a hydrophilic nonwoven fabric or a hydrophilic fiber aggregate can be used. Examples of the nonwoven fabric include an air-through nonwoven fabric, a point bond nonwoven fabric, a resin bond nonwoven fabric, a spunlace nonwoven fabric, and an airlaid nonwoven fabric. The basis weight of the second sheet 5 is preferably 10 g / m ² , more preferably 15 g / m ² or more, and preferably 50 g / m ² or less, more preferably 40 g / m ² or less. The thickness of the second sheet 5 is preferably 0.1 mm or more and 5 mm or less.

  A pair of sides on both sides along the longitudinal direction X of the skin-facing surface of the absorbent body 6, that is, the skin-facing surface of the topsheet 2, overlaps with the left and right sides along the longitudinal direction X of the absorbent body 4 in plan view. The sheets 7 and 7 are arranged over substantially the entire length in the longitudinal direction X of the absorbent main body 6. The pair of side sheets 7 and 7 are joined to the top sheet 2 by known joining means such as an adhesive at joining lines (not shown) extending in the longitudinal direction X.

  Leakproof grooves 8 and 9 are formed on the skin facing surface of the absorbent main body 6, that is, the skin facing surface of the topsheet 2. Each of the leak-proof grooves 8 and 9 is formed such that the surface layer composed of the top sheet 2 and the second sheet 5 and the absorber 4 are integrally recessed toward the back sheet 3 side. The density is higher than that of the periphery. The leak-proof groove 8 has a closed ring shape having a constricted portion in a plan view as shown in FIG. 1 and extends from a portion near the excretory portion facing portion B of the front portion A to a portion near the excretory portion facing portion B of the rear portion C. It extends in the vertical direction X. A pair of leak-proof grooves 9 are formed on both outer sides in the lateral direction Y of the leak-proof groove 8 in the excretory part facing part B, and project toward the outer side in the lateral direction Y in a plan view as shown in FIG. It has an arc shape. The leakage preventing grooves 8 and 9 can be expected to have effects such as suppressing the diffusion of the liquid in the planar direction of the absorbent body 4, particularly in the lateral direction Y, and preventing the absorbent body 4 from twisting. The leak-proof grooves 8 and 9 can be formed in accordance with a conventional method by squeezing with or without heat, or embossing such as ultrasonic embossing. In the leak-proof grooves 8 and 9, the top sheet 2, the second sheet 5 and the absorber 4 are integrated by heat fusion or the like.

  In the sanitary absorbent article of the present invention, the surface layer has a plurality of cuts or through-holes penetrating the surface layer in the thickness direction, and the absorbent core is formed on the skin-facing surface of the absorbent core. A plurality of recesses or through holes having openings are formed. In FIG. 3, the surface layer in the napkin 1, that is, the laminate of the top sheet 2 and the second sheet 5, and the skin facing surface side of the absorbent core 40 located in the vicinity of the laminate are shown enlarged. . In the napkin 1, as shown in FIGS. 1 to 3, both sheets 2, A plurality of surface layer through-holes 20 penetrating through 5 are formed, and a plurality of hollow portions 42 having openings on the skin facing surface of the absorbent core 40 are formed in the absorbent core 40. The recess 42 is defined by a bottom wall 42U located on the opposite side of the opening of the recess 42 and a side wall 42S standing from the periphery of the bottom wall 42U toward the skin facing surface. It is a space part.

  In the sanitary absorbent article of the present invention, in plan view, at least one of the plurality of cuts or through holes in the surface layer and at least one of the plurality of recesses or through holes in the absorbent core. The part overlaps. In this regard, in the napkin 1, the plurality of surface layer through holes 20 in the laminate of the surface sheet 2 and the second sheet 5 and the plurality of depressions 42 in the absorbent core 40 overlap one by one. In the plan view of the skin facing surface of the napkin 1 as shown in FIG. 1, the bottom wall portion 42 </ b> U of the recessed portion 42 can be confirmed through the surface layer through hole 20 corresponding thereto. That is, in the napkin 1, the patterns determined by the number and arrangement of the plurality of surface layer through-holes 20 and the plurality of depressions 42 are the same.

  In the napkin 1, as shown in FIG. 1, each of the plurality of surface layer through holes 20 has a circular shape in plan view, and is formed in a dotted pattern on the skin facing surface of the napkin 1, that is, the skin facing surface of the surface sheet 2. Yes. Each of the plurality of depressions 42 also has a circular shape in a plan view, and is formed in a dotted shape on the skin facing surface of the absorbent core 40 (absorber 4). Both the surface layer through-hole 20 and the recess 42 are in a zigzag pattern.

  In the present invention, the cut or through hole in the surface layer and the recess or through hole in the absorbent core can be formed by known embossing. Taking the napkin 1 as an example, the surface sheet 2 and the second sheet 5 as the surface layer, and the absorbent core 40 and the core wrap sheet 41 as the absorbent body 4 are laminated on the surface of the laminated body. Pin embossing is applied from the sheet 2 side. The pin embossing is a well-known embossing performed using a pin provided on the surface of a pressure body made of a roller or the like. By the pin embossing, in the top sheet 2 and the second sheet 5, the portion pressed by the pin is broken to form the surface layer through-hole 20 or a not-shown cut, and in the absorbent core 40, the skin facing surface The side is pressed by a pin and is recessed to the non-skin facing surface side, so that a recess 42 or a through hole (not shown) is formed. In this way, when the surface layer and the absorbent core (absorber) are laminated and embossed integrally with each other, a plurality of cuts or through-holes in the surface layer and the absorbent The plurality of depressions or through-holes in the core overlap one-on-one in plan view.

  In the napkin 1, as the constituent member of the absorbent body 4, in addition to the absorbent core 40, a core wrap sheet 41 that covers the core is disposed, and the skin facing surface of the absorbent core 40 in the core wrap sheet 41. The portion covering the skin (skin-side core wrap sheet) is usually broken in the same manner as the sheets 2 and 5 constituting the surface layer by the pin embossing, and communicates with the surface layer through-hole 20 as shown in FIG. A through hole is formed. That is, in the napkin 1, the core wrap sheet 41 is disposed over the entire area of the absorbent core 40 on the skin facing surface side, and the core wrap sheet 41 is opened at the opening of the recess 42.

  However, in the present invention, the skin-side core wrap sheet does not have to be broken (that is, the notch is formed at the notch or through hole forming position in the surface layer, or at the recessed part or through hole forming position in the absorbent core). For example, the skin-side core wrap sheet is not ruptured by the pin embossing, and is deformed so as to be raised toward the absorbent core, and the deformed core wrap. The raised portion of the sheet may enter into a recess or a through hole in the absorbent core. Moreover, although the form which has coat | covered the opening part of the skin opposing surface of an absorptive core is shown in FIG. 8 as another embodiment of this invention, without a skin side core wrap sheet | seat breaking or deform | transforming, This will be described later.

  When the surface layer is subjected to pin embossing as described above, the contact portion with the pin in the surface layer is cut, and the pin needs to penetrate the surface layer in the thickness direction. This is because the “cuts or through-holes penetrating the surface layer in the thickness direction” to be provided in the sanitary absorbent article of the present invention are not formed only by deforming the surface layer without being cut by the pins. In this respect, if the surface layer is a material (typically non-woven fabric) that is normally used as a surface sheet or a second sheet in this type of absorbent article, the surface layer is almost always obtained by a known pin embossing process. It is possible to form a notch or a through-hole penetrating this in the thickness direction. In addition, for example, when the heat-sealed portion is formed in a predetermined pattern such as a lattice shape or a dot-like shape on the surface layer, such a surface layer loses its inherent extensibility in the heat-sealed portion. , There is a tendency to be easily cut without stretching during pin embossing. In addition, the surface layer can be easily cut by means such as sharpening the tip shape of the pin used in pin embossing or increasing the amount of pressing of the pin against the surface layer.

  In the present invention, the cut is a slit (slit) formed by cutting the constituent fibers of the surface layer, and penetrates the surface layer in the thickness direction. The incision may be formed by pin embossing, but is generally formed by pressing a blade against the skin facing surface of the surface layer and sliding the blade in a predetermined direction. The notch is common to the through hole in that it penetrates the surface layer in the thickness direction, but the interval between the opposing wall portions (wall portions extending in the longitudinal direction of the notch) that define this is compared to that of the through hole. Differ in short points. In the case of a through-hole, the space surrounded by the wall portion can usually be confirmed visually, but in the case of a cut, it is usually very close even if the wall portions are in contact or not in contact. For this reason, it is difficult to visually confirm the space.

  In the present invention, the surface layer may have only one of the notch and the through hole, or both of them may be mixed. Further, the plurality of cuts or through holes in the surface layer may be the same or different in shape and / or size in plan view. The above description of the surface layer also applies to the depressions and through holes in the absorbent core. Moreover, the planar view shape of the through-hole and the hollow portion in the surface layer or the absorbent core is not limited to a circle as shown in FIG. 1, and may be, for example, a polygon such as a triangle, a square, or a rectangle, a star, or an ellipse. .

  As one of the main features of the napkin 1, as described above, in addition to the surface layer through-hole 20 and the recessed portion 42 of the absorbent core 40 overlapping, the skin of the wearer more than the absorbent core 40. The point that the hemagglutinating agent 10 exists in the near position is mentioned. In the napkin 1, the hemagglutinating agent 10 is provided on the non-skin facing surface of the second sheet 5, as shown in FIGS. That is, in the excretion part opposing part B of the napkin 1, the surface sheet 2, the second sheet 5, the hemagglutinating agent 10, the core wrap sheet 41, and the absorbent core 40 are sequentially laminated in the order close to the wearer's skin. In the present invention, the “hemagglutinating agent” means an agent capable of aggregating red blood cells in blood, and more specifically, a compound that meets the definition described later is preferable.

  In general, the absorption rate and amount of water absorbed by a superabsorbent polymer vary depending on the type of water. When comparing saline and blood, blood absorbs more slowly and absorbs more than saline. Few. The reason is as follows. Blood is roughly divided into liquid components such as plasma and non-liquid components such as red blood cells, and the components absorbed by the superabsorbent polymer are liquid components such as plasma. As shown in FIG. 5A, when menstrual blood 11 comes into contact with superabsorbent polymer 14, only liquid component 12 in menstrual blood 11 is absorbed by superabsorbent polymer 14, and red blood cells that are non-liquid component 13 are high. It is not absorbed by the absorbent polymer 14. When the absorption of the liquid component 12 into the superabsorbent polymer 14 proceeds, the non-liquid component 13 that is not absorbed by the superabsorbent polymer 14 accumulates on the surface of the superabsorbent polymer 14 as shown in FIG. A coating 14 is formed. Due to the formation of the coating film 14, liquid absorption inhibition of the superabsorbent polymer 14 occurs, and the absorption rate decreases. In addition, due to the formation of the coating 14, swelling of the superabsorbent polymer 14 is also inhibited, and the amount of absorption is reduced.

  As a result of various studies conducted by the present inventors on the means for preventing the phenomenon as shown in FIG. 5 (b) from occurring and preventing the decrease in absorption performance, a component occupying most of the non-liquid components in menstrual blood It has been found that it is effective to agglomerate erythrocytes as shown in FIG. By forming the agglomerate 15 of erythrocytes, it becomes difficult to produce a coating film of the agglomerate 15, or even if a coating film 14 as shown in FIG. Since there remains a space through which the component 12 can permeate, absorption inhibition of the liquid component 12 is difficult to occur. As a result, the superabsorbent polymer 14 can sufficiently exhibit the absorption performance. Here, the absorption performance is expressed on the basis of the absorption amount and the absorption rate. The amount of absorption can be expressed as the ratio of the volume of the superabsorbent polymer 14 before absorption to the volume of the superabsorbent polymer 14 after absorption, that is, the volume swelling magnification described later. Further, the absorption rate can be expressed as the slope of the volume swell ratio of the superabsorbent polymer 14 over time.

  In the sanitary absorbent article of the present invention, the hemagglutinating agent plays a role in generating erythrocyte aggregates during menstrual blood. According to the knowledge of the present inventor, a cationic polymer is useful as a hemagglutinating agent for the following reason. Red blood cells have a red blood cell membrane on their surface. The erythrocyte membrane has a two-layer structure. This two-layer structure is composed of a red blood cell membrane skeleton as a lower layer and a lipid membrane as an upper layer. The lipid film exposed on the surface of erythrocytes contains a protein called glycophorin. Glycophorin has a sugar chain to which a sugar having an anionic charge called sialic acid is bonded at its end. As a result, erythrocytes can be treated as colloidal particles having an anionic charge. In general, an aggregating agent is used for aggregating the colloidal particles. Considering that erythrocytes are anionic colloidal particles, it is advantageous to use a cationic substance as an aggregating agent from the viewpoint of neutralizing the electric double layer of erythrocytes. Further, if the aggregating agent has a polymer chain, the polymer chains of the aggregating agent adsorbed on the surface of the erythrocyte tend to be entangled with each other, thereby promoting the aggregation of erythrocytes. Furthermore, when the aggregating agent has a functional group, it is preferable because the aggregation of erythrocytes is promoted by the interaction between the functional groups. According to the hemagglutinating agent (cationic polymer), it becomes possible to produce an aggregate of red blood cells during menstrual blood by the above mechanism of action.

  In the napkin 1, the hemagglutinating agent 10 having such an effect is, as described above, the non-skin facing surface of the second sheet 5 at a position closer to the wearer's skin than the absorbent core 40 in the excretory portion facing portion B. It is not provided in the absorptive core 40 containing a superabsorbent polymer. During wearing of the napkin 1 having such a structure, menstrual blood excreted from the excretion part of the wearer to the excretion part facing part B sequentially passes through the top sheet 2 and the second sheet 5 to face the non-skin of the second sheet 5. It comes into contact with the hemagglutinating agent 10 provided on the surface, and is thereby separated into red blood cells and plasma. The red blood cells that are difficult to be absorbed by the superabsorbent polymer form aggregates and remain on the non-skin facing surface of the second sheet 5 (between the second sheet 5 and the skin-side core wrap sheet 41) and in the vicinity thereof. Plasma that is easily absorbed by the absorbent polymer diffuses in the plane direction over the entire absorbent core 40, and at least a part thereof flows into the recessed portion 42 and is absorbed from the side wall portion 42S and the bottom wall portion 42U of the recessed portion 42. It is absorbed into the interior of the absorbent core 40 and finally absorbed and held by a superabsorbent polymer (not shown) contained in the absorbent core 40. In this manner, the napkin 1 separates menstrual blood into red blood cells and plasma by the hemagglutinating agent 10 at a position closer to the wearer's skin than the absorbent core 40, and only the separated plasma is preferentially depressed. Since the absorbent core 40 is drawn into the interior of the absorbent core 40 via the lip and is absorbed and retained by the superabsorbent polymer, the absorbent core 40 can quickly absorb menstrual blood without being inhibited by red blood cells, Thereby, the sticky feeling of the part which touches a wearer's skin can be reduced significantly. If the hemagglutinating agent 10 is directly applied to the skin-facing surface of the absorbent core 40, it is included in the absorbent core 40 due to the influence of the aggregate of red blood cells separated from menstrual blood by the action of the hemagglutinating agent 10. The liquid absorption by the superabsorbent polymer may be hindered.

  According to the napkin 1, excretion fluid such as menstrual blood hardly stays in a portion corresponding to the fluid excretion portion of the wearer and its peripheral portion, and even when the amount of excretion fluid is relatively large, this is quickly absorbed. Moreover, the so-called liquid return in which the excretory liquid once absorbed by the absorbent core 40 returns to the surface sheet 2 side, or the so-called liquid residue remaining in the surface sheet 2 without being absorbed is effectively prevented. The In addition, since the liquid component in menstrual blood such as plasma is efficiently absorbed by the absorbent core 40, the occurrence of inconvenience such as transpiration of the liquid component, stuffiness and skin fog due to the liquid component is effectively prevented.

From the viewpoint of more effectively utilizing the above-described effects of the hemagglutinating agent 10, it is preferable to set the dimensions and the like of each part of the napkin 1 as follows.
The diameter R1 (see FIG. 3) in plan view of the surface layer through-hole 20 is preferably 1.0 mm or more, more preferably 1.5 mm or more, and preferably 6.0 mm or less, more preferably 4.0 mm or less. is there. The “diameter in plan view” here means the diameter of an imaginary circle inscribed in the surface layer through hole 20 in plan view when the plan view shape of the surface layer through hole 20 is not circular. Further, when the plane area of the surface through hole 20 is not constant in the thickness direction but is partially different, the diameter of the surface through hole 20 in the planar shape at the outermost surface position on the skin facing surface side of the surface layer is set to “plane”. "Diameter in view".
The distance between adjacent surface layer through-holes 20, 20 is preferably 1.0 mm or more, more preferably 1.5 mm or more, and preferably 10 mm or less, more preferably 8 mm or less.
The number of the surface layer through-holes 20 existing in the square-shaped region of 70 mm square in plan view in the excretory part facing part B is preferably 25 or more, more preferably 36 or more, and preferably 1225 or less, more preferably Is 530 or less.

The diameter R2 (see FIG. 3) of the hollow portion 42 in a plan view is preferably 1.0 mm or more, more preferably 1.5 mm or more, and preferably 6.0 mm or less, more preferably 4.0 mm or less. The “diameter in plan view” here means the diameter of a virtual circle inscribed in the recess 42 in plan view when the shape of the recess 42 in plan view is not circular. In addition, when the flat area of the recess 42 is not constant in the thickness direction but is partially different, the diameter of the recess 42 in the planar shape at the outermost surface position on the skin facing surface side of the absorbent core 40 is expressed as “plane "Diameter in view".
The depth D (see FIG. 3) of the recess 42 is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 12 mm or less, more preferably 10 mm or less.
The interval between the adjacent depressions 42 and 42 is preferably 1.0 mm or more, more preferably 1.5 mm or more, and preferably 10 mm or less, more preferably 8 mm or less.
The number of depressions 42 present in a square area of 70 mm square in plan view in the excretory part facing part B is preferably 25 or more, more preferably 36 or more, and preferably 1225 or less, more preferably 530. Or less.

In addition, the ratio of the surface layer through-holes 20 in the surface layer that overlap with the recess 42 of the absorbent core 40 in plan view is preferably at least 5%, particularly preferably 10% or more. As used herein, “overlap with the dent portion 42” includes not only the case where one entire surface layer through hole 20 overlaps with the dent portion 42, but also one surface layer through hole as shown in FIGS. 1 to 3. The case where only a part of 20 overlaps with the recessed portion 42 is also included. In the napkin 1, such a ratio is 100%.
In addition, in the absorptive core 40, it can design similarly to the hollow part 42 about the through hole in the case of forming a through hole instead of the hollow part 42. FIG.

The amount of hemagglutinating agent 10 per unit area is preferably 0.5 g / m ² or more, more preferably 1.0 g / m ² or more, and preferably 12 g / m ² or less, more preferably 10 g / m ^2. It is as follows.
The amount per unit area of the superabsorbent polymer in the absorbent core 40 is preferably 5 g / m ² or more, more preferably 10 g / m ² or more, and preferably 100 g / m ² or less, more preferably 80 g / m. ² or less.

  Hereinafter, other embodiments of the present invention will be described with reference to FIGS. In other embodiments to be described later, constituent parts different from the above-described napkin 1 will be mainly described, and the same constituent parts will be denoted by the same reference numerals and description thereof will be omitted. The description of the napkin 1 is appropriately applied to components that are not particularly described.

  In the napkin 1 </ b> A shown in FIG. 6, in the excretory part facing part B, the break part 21, which is a part that defines the surface layer through-hole 20 in the surface layer, It extends toward the. The napkin 1A is a state in which the surface sheet 2 and the second sheet 5 as the surface layer, and the absorbent core 40 and the core wrap sheet 41 as the absorbent body 4 are laminated from the surface sheet 2 side with respect to the laminated body. It is manufactured through a process of forming the surface layer through-hole 20 in the surface layer by forming pin embossing and forming the recess 42 in the absorbent core 40. The surface layer is broken by processing and pushed into the absorbent core 40 side, and protrudes to the non-skin facing surface side as compared to the peripheral portion of the surface layer. The fracture | rupture part 21 has coat | covered the part near the opening part of the hollow part 42 in the side wall part 42S of the hollow part 42 over the full length of the circumferential direction. Also, the core wrap sheet 41 is formed with a rupture portion 43 similar to the rupture portion 21 of the surface layer by this pin embossing, and extends from the opening of the recessed portion 42 together with the rupture portion 21 toward the inside thereof. Yes. That is, in the napkin 1 </ b> A, the core wrap sheet 41 is disposed over the entire area of the absorbent core 40 on the skin facing surface side, and the core wrap sheet 41 enters the opening at the opening of the recess 42. Moreover, since the hemagglutinating agent 10 is provided in the whole area of the non-skin facing surface of the second sheet 5, the hemagglutinating agent 10 is also applied to the non-skin facing surface of the second sheet 5 that constitutes the breaking portion 21 extending inside the recess 42. The hemagglutinating agent 10 exists, and therefore, the hemagglutinating agent 10 exists in the inside of the recessed portion 42, specifically, in the side wall portion 42S near the opening of the recessed portion 42. Note that the diameter (the length corresponding to R2 in FIG. 3) of the recess 42 of the napkin 1A is between the side walls 42S in the opening of the absorbent core 40 when the flat area of the recess 42 is not constant in the thickness direction. It becomes the distance.

FIG. 7 shows another embodiment of the surface layer and the absorbent core. The napkin 1B shown in FIG. 7A does not include the second sheet 5, the surface layer is composed of only the surface sheet 2, and the hemagglutinating agent 10 is provided on the non-skin facing surface of the surface sheet 2. Except for the point, it is the same as the napkin 1 shown in FIG. In the napkin 1B, the surface layer in which the hemagglutinating agent 10 is provided on the non-skin facing surface does not extend into the recessed portion 42, and the hemagglutinating agent 10 does not exist inside the recessed portion 42.
The napkin 1C shown in FIG. 7 (b) does not have the second sheet 5, the surface layer is composed only of the surface sheet 2, and the hemagglutinating agent 10 is provided on the non-skin facing surface of the surface sheet 2. Except for this point, it is the same as the napkin 1A shown in FIG.

The napkin 1D shown in FIG. 7 (c) is similar to the napkin 1D shown in FIG. 7 (b) except that the separation part 22 cut off from the top sheet 2 as the surface layer exists on the bottom wall part 42U of the depression part 42. It is the same as the napkin 1C shown in FIG. The surface layer separation part 22 is completely separated from the surface layer in the pin embossing for forming the surface layer through-hole 20 and falls onto the bottom wall part 42U. Moreover, the separation part 44 derived from the core wrap sheet 41 is formed by this pin embossing, and the separation part 44 is located on the non-skin facing surface side of the separation part 22, and the two separation parts 22, 44 are separated from each other. There is a hemagglutinating agent 10 between them. That is, in the napkin 1D, the hemagglutinating agent 10 is present on the side wall portion 42S of the recess portion 42 near the opening of the recess portion 42 and the bottom wall portion 42U.
The napkin 1E shown in FIG. 7 (d) is the same as the napkin 1C shown in FIG. 7 (b), except that the broken portions 21 and 43 are not continuous over the entire length in the circumferential direction of the opening of the recessed portion 42. .

  In the napkin 1F shown in FIG. 8, the hydrophilic core wrap sheet 41 covering the skin facing surface of the absorbent core 40A is not broken (does not have cuts and through holes), and the opening of the recess 42 Except that the part is covered with the core wrap sheet 41, it is the same as the napkin 1B shown in FIG. Such a napkin 1F having an unbroken core wrap sheet 41 can be manufactured by a method different from the above-described method of performing pin embossing on the laminate of the surface layer and the absorber. it can. That is, the absorbent core 40A having the recess 42 is manufactured, and the outer surface including the skin facing surface of the manufactured absorbent core 40A is covered with the core wrap sheet 41 to obtain the absorbent, and the skin facing surface of the absorbent body In addition, the napkin 1F can be manufactured by superposing the separately manufactured topsheet 2 having the top layer through-holes 20.

  The absorbent core 40 </ b> A in the napkin 1 </ b> F can be manufactured by separately manufacturing a flat absorbent core having no recess and embossing the skin-facing surface of the absorbent core to form the recess 42. However, when a core forming material such as hydrophilic fiber is stacked to manufacture an absorbent core, the absorbent core can also be manufactured by intentionally reducing the amount of stacking of the portion where the depression is to be formed. Specifically, for example, in the step of obtaining the absorbent core by sucking and depositing the core forming material supplied on the airflow on the bottom of the accumulation recess formed on the outer surface of the fiber stacking device (rotating drum or the like), By adjusting the hole area ratio of the portion corresponding to the dent in the bottom part to be lower than that of the peripheral part, the amount of the core forming material in the part having the low hole area ratio is smaller than that of the peripheral part. Since it decreases, a hollow part is formed in this part. The hollow portion 42 formed by embossing a flat absorbent core having no hollow portion has a bottom wall portion 42U that is consolidated and has a higher density than the peripheral portion. In this way, since the core forming material is not consolidated in the formation process, the hollow portion 42 formed by reducing the amount of the core forming material in comparison with the peripheral portion has a density compared with the peripheral portion. Has a feature that there is no substantial difference.

  FIG. 9 shows the skin facing surface side of the absorbent core 40A in the napkin 1F. In the excretory part facing part B of the skin facing surface of the absorbent core 40A, a plurality of linear dent parts 42 extend in the vertical direction X, and a plurality of linear dent parts 42 extend in the horizontal direction Y. The part located in the excretion part opposing part B of 40 A of absorbent cores is divided into the some small area | region 45 by the several linear hollow part 42 orthogonal to each other in this way. The small region 45 is a high basis weight portion 45 in which the amount of the core forming material is larger than the formation position of the recess portion 42 (bottom wall portion 42U). Thus, the part located in the excretion part opposing part B of 40 A of absorbent cores is the high basic weight part 45 and the linear hollow part 42 (low basic weight part which surrounds this high basic weight part 45 over the perimeter. And a block structure having a large number of block regions, and each block region is individually independent.

  Hereinafter, the hemagglutinating agent used in the present invention will be described. The hemagglutinating agent used in the present invention acts to agglutinate erythrocytes in the blood and separate the aggregate from the aggregated blood cells and plasma components.

Preferred hemagglutinating agents include those having the following properties, for example.
That is, when 1000 ppm of the measurement sample agent is added to the pseudo blood, this measurement sample agent is preferable when at least two blood cells aggregate to form an aggregate in a state where the blood fluidity is maintained. Hemagglutinating agent.
The simulated blood has a viscosity of 8 mPa · s measured using a B-type viscometer (manufactured by Toki Sangyo Co., Ltd., model number TVB-10M, measurement conditions: rotor No. 19, 30 rpm, 25 ° C., 60 seconds). In addition, a blood cell / plasma ratio of defibrinated horse blood (manufactured by Nippon Biotest Co., Ltd.) was prepared.

Here, “the state in which the fluidity of blood is maintained” means that 10 g of the simulated blood to which the measurement sample agent is added is a screw tube bottle (product number “Screw tube No. 4” manufactured by Marum Co., Ltd.) 5 mm, trunk diameter 27 mm, total length 55 mm), and when the screw tube bottle containing the pseudo blood is inverted 180 degrees, the pseudo menstrual blood with a volume of 60% or more flows down within 20 seconds.
Further, whether or not “two or more blood cells aggregate to form an aggregate” is determined as follows. That is, the simulated blood to which the measurement sample agent was added at 1000 ppm was diluted 4000 times with physiological saline, and a laser diffraction / scattering type particle size distribution measuring device (manufactured by HORIBA, Inc., model number: LA-950V2, measurement condition: flow type cell). The average median diameter of the volume particle diameter measured at a temperature of 25 ° C. by a laser diffraction scattering method using a measurement, a circulation speed of 1 and no ultrasonic wave corresponds to the size of an aggregate obtained by agglomeration of two or more blood cells. In the case of 10 μm or more, it is determined that “two or more blood cells aggregate to form an aggregate”.

  The hemagglutinating agent used in the present invention is an agent that can satisfy the above definition (can express erythrocyte aggregation) by a compound that meets the above definition or a combination thereof, or a combination of compounds. That is, the hemagglutinating agent is an agent limited to those having a hemagglutinating action as defined above. Therefore, when the hemagglutinating agent contains a third component that does not meet the above definition, it is expressed as a hemagglutinating agent composition and is distinguished from the hemagglutinating agent. In particular, a compound or a combination thereof that meets the definition of the preferred hemagglutinating agent described above is preferable.

  Cationic polymers are suitable as compounds compatible with the preferred hemagglutinating agent that meets the above definition. Examples of the cationic polymer include cationized cellulose and cationized starch such as hydroxypropyltrimonium chloride. The hemagglutinating agent used in the present invention can also contain a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer or a quaternary ammonium salt polycondensate as a cationic polymer. In the present invention, the “quaternary ammonium salt” includes a compound having a plus monovalent charge at the nitrogen atom position, or a compound that generates a plus monovalent charge at the nitrogen atom position by neutralization. Specific examples thereof include a salt of a quaternary ammonium cation, a neutralized salt of a tertiary amine, and a tertiary amine having a cation in an aqueous solution. The “quaternary ammonium moiety” described below is also used in the same meaning and is a moiety that is positively charged in water. Further, in the present invention, the “copolymer” is a polymer obtained by copolymerization of two or more kinds of polymerizable monomers, and is a binary copolymer or a ternary copolymer or more. Includes both things. In the present invention, the “polycondensate” is a polycondensate obtained by polymerizing a condensate composed of two or more monomers.

  When the hemagglutinating agent used in the present invention contains a quaternary ammonium salt homopolymer and / or a quaternary ammonium salt copolymer and / or a quaternary ammonium salt polycondensate as the cationic polymer, the hemagglutination The agent may contain any one of a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer and a quaternary ammonium salt polycondensate, or any combination of two or more. May be included. Moreover, a quaternary ammonium salt homopolymer can be used individually by 1 type or in combination of 2 or more types. Similarly, the quaternary ammonium salt copolymer can be used alone or in combination of two or more. Furthermore, similarly, a quaternary ammonium salt polycondensate can be used individually by 1 type or in combination of 2 or more types.

  Of the various cationic polymers described above, in particular, the use of a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer or a quaternary ammonium salt polycondensate from the viewpoint of adsorptivity to erythrocytes. preferable. In the following description, for convenience, the quaternary ammonium salt homopolymer, the quaternary ammonium salt copolymer and the quaternary ammonium salt polycondensate are collectively referred to as “quaternary ammonium salt polymer”.

  The quaternary ammonium salt homopolymer is obtained by polymerizing one type of polymerizable monomer having a quaternary ammonium moiety. On the other hand, the quaternary ammonium salt copolymer uses at least one polymerizable monomer having a quaternary ammonium moiety and, if necessary, at least one polymerizable monomer having no quaternary ammonium moiety. It was obtained by using seeds and copolymerizing them. That is, the quaternary ammonium salt copolymer is obtained by using two or more polymerizable monomers having a quaternary ammonium moiety and copolymerizing them, or having a quaternary ammonium moiety. It is obtained by copolymerizing one or more polymerizable monomers having one or more polymerizable monomers having no quaternary ammonium moiety. The quaternary ammonium salt copolymer may be a random copolymer, an alternating copolymer, a block copolymer, or a graft copolymer. The quaternary ammonium salt polycondensate is obtained by polymerizing these condensates using a condensate composed of one or more monomers having a quaternary ammonium moiety. That is, the quaternary ammonium salt polycondensate is obtained by polymerizing two or more kinds of condensates having a quaternary ammonium moiety, or quaternary ammonium moieties. And a condensate comprising one or more monomers having quaternary ammonium moieties and one or more monomers having no quaternary ammonium moiety, and obtained by condensation polymerization.

  A quaternary ammonium salt polymer is a cationic polymer having a quaternary ammonium moiety. A quaternary ammonium moiety can be generated by quaternary ammoniumation of a tertiary amine using an alkylating agent. Alternatively, the tertiary amine can be dissolved in acid or water and generated by neutralization. Or it can produce | generate by the quaternary ammonium formation by the nucleophilic reaction containing a condensation reaction. Examples of the alkylating agent include alkyl halides and dialkyl sulfates such as dimethyl sulfate and dimethyl sulfate. Of these alkylating agents, the use of dialkyl sulfate is preferable because the problem of corrosion that may occur when an alkyl halide is used does not occur. Examples of the acid include hydrochloric acid, sulfuric acid, nitric acid, acetic acid, citric acid, phosphoric acid, fluorosulfonic acid, boric acid, chromic acid, lactic acid, oxalic acid, tartaric acid, gluconic acid, formic acid, ascorbic acid, and hyaluronic acid. . In particular, it is preferable to use a quaternary ammonium salt polymer in which a tertiary amine moiety is quaternized with an alkylating agent, because the electric double layer of erythrocytes can be reliably neutralized. Quaternary ammoniumation by a nucleophilic reaction including a condensation reaction can be caused by a ring-opening polycondensation reaction of dimethylamine and epichlorohydrin or a cyclization reaction of dicyandiamide and diethylenetriamine.

  From the viewpoint of effectively generating red blood cell aggregates, the cationic polymer preferably has a molecular weight of 2000 or more, more preferably 10,000 or more, and even more preferably 30,000 or more. When the molecular weight of the cationic polymer is not less than these values, the entanglement of the cationic polymers between the erythrocytes and the crosslinking of the cationic polymer between the erythrocytes are sufficiently caused. The upper limit of the molecular weight is preferably 10 million or less, more preferably 5 million or less, and even more preferably 3 million or less. When the molecular weight of the cationic polymer is not more than these values, the cationic polymer dissolves well into menstrual blood. The molecular weight of the cationic polymer is preferably 2000 or more and 10 million or less, more preferably 2000 or more and 5 million or less, further preferably 2000 or more and 3 million or less, and more preferably 10,000 or more and 3 million or less. It is even more preferable, and it is particularly preferably 30,000 to 3,000,000. The molecular weight referred to in the present invention is a weight average molecular weight. Further, two or more kinds of cationic polymers having different molecular weights may be combined within the aforementioned molecular weight range. The molecular weight of the cationic polymer can be controlled by appropriately selecting the polymerization conditions. The molecular weight of the cationic polymer can be measured using HLC-8320GPC manufactured by Tosoh Corporation. Specific measurement conditions are as follows.

  As the column, a column in which a guard column α and an analytical column α-M manufactured by Tosoh Corporation are connected in series is used at a column temperature of 40 ° C. The detector uses RI (refractive index). As a measurement sample, 1 mg of the treatment agent (quaternary ammonium salt polymer) to be measured is dissolved in 1 mL of the eluent. A copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate uses an eluent in which 150 mmol / L sodium sulfate and 1% by mass acetic acid are dissolved in water. A copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate has a molecular weight of 5900, a pullulan with a molecular weight of 47300, a pullulan with a molecular weight of 212,000, and a molecular weight of 788,000 with respect to 10 mL of the eluent. Pullulan, a pullulan mixture with 2.5 mg each dissolved, is used as the molecular weight standard. A copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate is measured at a flow rate of 1.0 mL / min and an injection amount of 100 μL. Except for a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate, elution with 50 mmol / L lithium bromide and 1% by mass acetic acid dissolved in ethanol: water = 3: 7 (volume ratio) Use liquid. Except for a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate, a polyethylene glycol (PEG) having a molecular weight of 106, a PEG having a molecular weight of 400, a PEG having a molecular weight of 1470, and a PEG having a molecular weight of 6450 with respect to 20 mL of the eluent. Polyethylene oxide (PEO) having a molecular weight of 50,000, PEO having a molecular weight of 235,000, PEO having a molecular weight of 875,000, and a PEG-PEO mixture in which 10 mg of each is dissolved is used as a molecular weight standard. Except for a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate, the flow rate is 0.6 mL / min and the injection amount is 100 μL.

  In the case of using a quaternary ammonium salt polymer as the cationic polymer, it is preferable that the quaternary ammonium salt polymer has a flow potential of 1500 μeq / L or more from the viewpoint of more effectively generating red blood cell aggregates. , More preferably 2000 μeq / L or more, still more preferably 3000 μeq / L or more, and still more preferably 4000 μeq / L or more. When the flow potential of the quaternary ammonium salt polymer is not less than these values, the electric double layer of erythrocytes can be sufficiently neutralized. The upper limit of the streaming potential is preferably 13000 μeq / L or less, more preferably 8000 μeq / L or less, and even more preferably 6000 μeq / L or less. When the flow potential of the quaternary ammonium salt polymer is below these values, the electrical repulsion between the quaternary ammonium salt polymers adsorbed on the erythrocytes can be effectively prevented. The streaming potential of the quaternary ammonium salt polymer is preferably 1500 μeq / L or more and 13000 μeq / L, more preferably 2000 μeq / L or more and 13000 μeq / L or less, and 3000 μeq / L or more and 8000 μeq / L or less. Is more preferably 4000 μeq / L or more and 6000 μeq / L or less.

The flow potential of the quaternary ammonium salt polymer adjusts, for example, the molecular weight of the constituting cationic monomer itself, and the copolymerization molar ratio of the cationic monomer and the anionic monomer or nonionic monomer constituting the copolymer. Can be controlled. The streaming potential of the quaternary ammonium salt polymer can be measured using a streaming potential measuring device (PCD04) manufactured by Spectris Co., Ltd. Specific measurement conditions are as follows. First, hot melt bonding each member to a commercially available napkin is invalidated using a dryer or the like, and decomposed into members such as a top sheet, an absorber, and a back sheet. For each decomposed member, a multi-stage solvent extraction method from a nonpolar solvent to a polar solvent is performed to separate the treating agent used in each member to obtain a solution containing a single composition. The obtained solution was dried and solidified, and 1H-NMR (nuclear magnetic resonance method), IR (infrared spectroscopy), LC (liquid chromatography), GC (gas chromatography), MS (mass spectrometry), GPC (gel) Permeation chromatography) and fluorescent X-rays are combined to identify the structure of the treatment agent. With respect to a measurement sample in which 0.001 g of a treatment agent (quaternary ammonium salt polymer) to be measured is dissolved in 10 g of physiological saline, a 0.001N sodium polyethylene sulfonate aqueous solution (if the measurement sample has a negative charge) , 0.001N polydiallyldimethylammonium chloride aqueous solution) is titrated, and the titer XmL required until the potential difference between the electrodes disappears is measured. Thereafter, the streaming potential of the quaternary ammonium salt polymer is calculated by the following formula 1.
Streaming potential = (X + 0.190 ^* ) × 1000 Equation 1
(* Titration required for the physiological saline solution)

  In order for the cationic polymer to be successfully adsorbed on the surface of erythrocytes, it is advantageous that the cationic polymer is likely to interact with sialic acid present on the surface of erythrocytes. From this point of view, the present inventors proceeded with studies, and as a result, inorganic value / organic value (hereinafter referred to as “IOB (Inorganic Organic Balance) value”), which is the ratio between the inorganic value and the organic value of the substance. It was found that the degree of interaction between the sialic acid conjugate and the cationic polymer can be evaluated on the basis of. Specifically, it has been found advantageous to use a cationic polymer having an IOB value that is the same as or close to that of the sialic acid conjugate. The sialic acid conjugate is a compound in which sialic acid can exist in a living body, and examples thereof include a compound in which sialic acid is bound to the end of a glycolipid such as galactolipid.

  In general, the properties of a substance are largely governed by various intermolecular forces between molecules, and this intermolecular force mainly consists of Van Der Waals force due to molecular mass and electrical affinity due to molecular polarity. If the Van Der Waals force, which has a great influence on changes in the properties of substances, and the electric affinity can be grasped individually, the properties of unknown substances or their mixtures can be predicted from the combination. be able to. This idea is a theory well known as “organic conceptual diagram”. Conceptual diagram of organic materials is, for example, “Organic analysis” written by Kei Fujita (Kanya Shoten, Showa 5), “Organic qualitative analysis: Systematic. Pure products” by Kyoda Fujita (Kyoritsu Shuppan, 1953) "Reform Chemistry Experiments-Organic Chemistry" by Kawasaki Sho (1971), "Systematic Organic Qualitative Analysis (mixture)" by Kaoru Fujita and Masami Akatsuka (Kasama Shobo, 1974), and Yoshio Koda It is described in detail in Shiro Sato and Yoshio Honma's “New Edition Organic Conceptual Diagram Basics and Applications” (Sankyo Publishing, 2008). In the organic conceptual diagram, regarding the physicochemical properties of materials, the degree of physical properties mainly due to Van Der Waals force is called “organic”, and the degree of physical properties mainly due to electrical affinity is called “inorganic”. The physical properties of substances are considered as a combination of “organic” and “inorganic”. Then, one carbon (C) is defined as organic 20, and the inorganic and organic values of various polar groups are defined as shown in Table 1 below. The sum of the values is obtained, and the ratio between the two is defined as the IOB value. In the present invention, the IOB value of the sialic acid conjugate described above is determined based on these organic and inorganic values, and the IOB value of the cationic polymer is determined based on the value.

  Specifically, when the cationic polymer is a homopolymer, the inorganic value and the organic value are determined based on the repeating unit of the homopolymer, and the IOB value is calculated. For example, in the case of polydiallyldimethylammonium chloride which is a cationic polymer used in Example 1 described later (trade name “Mercoat 106” manufactured by Nippon Lubrizol Co., Ltd.), an organic value of −C− × 8 = 160, Ammo and NH4 salt × 1 = 400 inorganic value, Ring (non-aromatic single ring) × 1 = 10 inorganic value, −Cl × 1 = 40 organic value and 10 inorganic value Therefore, the sum of the inorganic values is 400 + 10 + 10 = 420, and the sum of the organic values is 160 + 40 = 200. Therefore, the IOB value is 420/200 = 2.10.

  On the other hand, when the cationic polymer is a copolymer, the IOB value is calculated by the following procedure according to the molar ratio of the monomers used for the copolymerization. That is, a copolymer is obtained from monomer A and monomer B, the organic value of monomer A is ORA, the inorganic value is INA, the organic value of monomer B is ORB, and the inorganic value is INB. Yes, when the molar ratio of monomer A / monomer B is MA / MB, the IOB value of the copolymer is calculated from the following equation.

  The IOB value of the cationic polymer thus determined is preferably 0.6 or more, more preferably 1.8 or more, further preferably 2.1 or more, 2.2 It is still more preferable that it is above. Further, the IOB value of the cationic polymer is preferably 4.6 or less, more preferably 3.6 or less, and even more preferably 3.0 or less. Specifically, the IOB value of the cationic polymer is preferably 0.6 or more and 4.6 or less, more preferably 1.8 or more and 3.6 or less, and 2.1 or more and 3.6 or less. More preferably, it is 2.2 or more and 3.0 or less. The IOB value of sialic acid is 4.25 for sialic acid alone and 3.89 for sialic acid conjugate. The sialic acid conjugate is a glycolipid in which a sugar chain in a glycolipid and sialic acid are bound, and the sialic acid conjugate has a higher organic value ratio and a lower IOB value than sialic acid alone.

  The IOB value of the cationic polymer is as described above, and the organic value itself is preferably 40 or more, more preferably 100 or more, and further preferably 130 or more. Further, it is preferably 310 or less, more preferably 250 or less, further preferably 240 or less, and further preferably 190 or less. For example, the organic value is preferably 40 or more and 310 or less, more preferably 40 or more and 250 or less, further preferably 100 or more and 240 or less, and still more preferably 130 or more and 190 or less. By setting the organic value of the cationic polymer within this range, the cationic polymer is more successfully adsorbed to erythrocytes.

  On the other hand, the inorganic value of the cationic polymer is preferably 70 or more, more preferably 90 or more, still more preferably 100 or more, still more preferably 120 or more, and 250 or more. It is particularly preferred that Further, it is preferably 790 or less, more preferably 750 or less, still more preferably 700 or less, still more preferably 680 or less, and particularly preferably 490 or less. For example, the inorganic value is preferably from 70 to 790, more preferably from 90 to 750, even more preferably from 90 to 680, even more preferably from 120 to 680, It is especially preferable that it is 250 or more and 490 or less. By setting the inorganic value of the cationic polymer within this range, the cationic polymer can be more effectively adsorbed to erythrocytes.

From the viewpoint of further successfully adsorbing the cationic polymer to erythrocytes, it is preferable that x and y satisfy the following formula A when the organic value of the cationic polymer is x and the inorganic value is y.
y = ax (A)
In the formula A, a is preferably 0.66 or more, more preferably 0.93 or more, and still more preferably 1.96 or more. Further, a is preferably 4.56 or less, more preferably 4.19 or less, and still more preferably 3.5 or less. For example, a is preferably a number from 0.66 to 4.56, more preferably from 0.93 to 4.19, and a number from 1.96 to 3.5. Is more preferable. In particular, if the organic value and the inorganic value of the cationic polymer satisfy the formula A, provided that the organic value and the inorganic value of the cationic polymer are within the above-mentioned ranges, the cationic property The polymer is likely to interact with the sialic acid conjugate, and the cationic polymer is more likely to be adsorbed to erythrocytes.

  From the viewpoint of effectively producing red blood cell aggregates, the cationic polymer is preferably water-soluble. In the present invention, “water-soluble” means that 0.05 g of a 1 mm or less powdery or 0.5 mm or less film-like cationic polymer is added to a 100 mL glass beaker (5 mmΦ) and mixed with 50 mL ion-exchanged water at 25 ° C. In this case, a stirrer chip having a length of 20 mm and a width of 7 mm is added, and the whole amount is dissolved in water within 24 hours under stirring at 600 rpm using a magnetic stirrer HPS-100 manufactured by ASONE Co., Ltd. In the present invention, as the more preferable solubility, the total amount is preferably dissolved in water within 3 hours, and the total amount is more preferably dissolved in water within 30 minutes.

  The cationic polymer preferably has a structure having a main chain and a plurality of side chains bonded thereto. In particular, the quaternary ammonium salt polymer preferably has a structure having a main chain and a plurality of side chains bonded thereto. The quaternary ammonium moiety is preferably present in the side chain. In this case, when the main chain and the side chain are bonded at one point, the flexibility of the side chain is difficult to be hindered, and the quaternary ammonium moiety present in the side chain is smoothly formed on the surface of the erythrocyte. Adsorbs. However, in the present invention, it is not hindered that the main chain and the side chain of the cationic polymer are bonded at two points or more. In the present invention, “bonded at one point” means that one of the carbon atoms constituting the main chain is single-bonded with one carbon atom located at the end of the side chain. . “Connected at two or more points” means that two or more of the carbon atoms constituting the main chain are each single-bonded with two or more carbon atoms located at the end of the side chain. Say.

  When the cationic polymer has a structure having a main chain and a plurality of side chains bonded thereto, for example, a quaternary ammonium salt polymer has a structure having a main chain and a plurality of side chains bonded thereto. In this case, the carbon number of each side chain is preferably 4 or more, more preferably 5 or more, and still more preferably 6 or more. The upper limit of the carbon number is preferably 10 or less, more preferably 9 or less, and still more preferably 8 or less. For example, the number of carbon atoms in the side chain is preferably 4 or more and 10 or less, more preferably 5 or more and 9 or less, and still more preferably 6 or more and 8 or less. The carbon number of the side chain is the carbon number of the quaternary ammonium moiety (cation moiety) in the side chain, and even if carbon is contained in the anion that is the counter ion, the carbon is counted. Not included. In particular, among the carbon atoms in the side chain, the number of carbon atoms from the carbon atom bonded to the main chain to the carbon atom bonded to the quaternary nitrogen is within the aforementioned range, so that the quaternary ammonium salt. This is preferable because the steric hindrance when the polymer is adsorbed on the surface of the erythrocyte is reduced.

  When the quaternary ammonium salt polymer is a quaternary ammonium salt homopolymer, examples of the homopolymer include a polymer of a vinyl monomer having a quaternary ammonium moiety or a tertiary amine moiety. . In the case of polymerizing a vinyl monomer having a tertiary amine moiety, a quaternary ammonium salt homopolymer in which the tertiary amine moiety is quaternized with an alkylating agent before and / or after polymerization. Becomes a polymer, becomes a tertiary amine neutralized salt obtained by neutralizing a tertiary amine site with an acid before and / or after polymerization, or becomes a tertiary amine having a cation in an aqueous solution after polymerization. . Examples of the alkylating agent and the acid are as described above.

  In particular, the quaternary ammonium salt homopolymer preferably has a repeating unit represented by the following formula 1.

  Specific examples of the quaternary ammonium salt homopolymer include polyethyleneimine. Further, poly (2-methacryloxyethyldimethylamine quaternary salt), poly (2-methacryloxyethyltrimethylammonium salt) in which the side chain having a quaternary ammonium moiety is bonded to the main chain at one point. ), Poly (2-methacryloxyethyldimethylethylammonium methylsulfate), poly (2-acryloxyethyldimethylamine quaternary salt), poly (2-acryloxyethyltrimethylamine quaternary salt), poly (2-acryloxy) Ethyldimethylethylammonium ethyl sulfate), poly (3-dimethylaminopropylacrylamide quaternary salt), dimethylaminoethyl polymethacrylate, polyallylamine hydrochloride, cationized cellulose, polyethyleneimine, polydimethylaminopropylacrylamide, polyamidine, etc. And the like. On the other hand, examples of the homopolymer in which the side chain having a quaternary ammonium moiety is bonded to the main chain at two or more points include polydiallyldimethylammonium chloride and polydiallylamine hydrochloride.

When the quaternary ammonium salt polymer is a quaternary ammonium salt copolymer, two kinds of polymerizable monomers used for the polymerization of the quaternary ammonium salt homopolymer described above are used as the copolymer. A copolymer obtained by the above copolymerization can be used. Alternatively, as a quaternary ammonium salt copolymer, one or more polymerizable monomers used for the polymerization of the quaternary ammonium salt homopolymer described above and a polymerizable monomer having no quaternary ammonium moiety The copolymer obtained by copolymerizing using 1 or more types of bodies can be used. Furthermore, in addition to or instead of the vinyl polymerizable monomer, other polymerizable monomers such as —SO ₂ — can be used. As described above, the quaternary ammonium salt copolymer may be a binary copolymer or a ternary or higher copolymer.

  In particular, the quaternary ammonium salt copolymer has a repeating unit represented by the above-described formula 1 and a repeating unit represented by the following formula 2 to effectively produce an agglomerate of erythrocytes. It is preferable from the viewpoint.

  Further, as the polymerizable monomer having no quaternary ammonium moiety, a cationic polymerizable monomer, an anionic polymerizable monomer, or a nonionic polymerizable monomer can be used. Among these polymerizable monomers, in particular, by using a cationic polymerizable monomer or a nonionic polymerizable monomer, charge cancellation with a quaternary ammonium moiety in a quaternary ammonium salt copolymer is achieved. Therefore, erythrocyte aggregation can be effectively generated. Examples of cationic polymerizable monomers include linear compounds having a cation-carrying nitrogen atom in the main chain, such as vinylpyridine as a cyclic compound having a cation-carrying nitrogen atom under a particular condition And a condensed compound of dicyandiamide and diethylenetriamine. Examples of the anionic polymerizable monomer include 2-acrylamido-2-methylpropanesulfonic acid, methacrylic acid, acrylic acid, styrenesulfonic acid, and salts of these compounds. On the other hand, examples of nonionic polymerizable monomers include vinyl alcohol, acrylamide, dimethylacrylamide, ethylene glycol, propylene glycol, ethylene glycol monomethacrylate, ethylene glycol monoacrylate, hydroxyethyl methacrylate, hydroxyethyl acrylate, methyl methacrylate, methyl Examples include acrylate, ethyl methacrylate, ethyl acrylate, propyl methacrylate, propyl acrylate, butyl methacrylate, and butyl acrylate. One of these cationic polymerizable monomers, anionic polymerizable monomers, or nonionic polymerizable monomers can be used, or any two or more of them can be used in combination. Can do. Also, two or more cationic polymerizable monomers can be used in combination, two or more anionic polymerizable monomers can be used in combination, or two or more nonionic polymerizable monomers can be used in combination. Can also be used. A quaternary ammonium salt copolymer copolymerized using a cationic polymerizable monomer, an anionic polymerizable monomer and / or a nonionic polymerizable monomer as a polymerizable monomer has a molecular weight of However, as described above, it is preferably 10 million or less, particularly preferably 5 million or less, and particularly preferably 3 million or less (the same applies to quaternary ammonium salt copolymers exemplified below).

A polymerizable monomer having a functional group capable of hydrogen bonding can also be used as the polymerizable monomer having no quaternary ammonium moiety. When such a polymerizable monomer is used for copolymerization, and when erythrocytes are aggregated using a quaternary ammonium salt copolymer obtained therefrom, a hard aggregate is likely to be formed. Absorption performance is less likely to be disturbed. Examples of the functional group capable of hydrogen bonding include —OH, —NH ₂ , —CHO, —COOH, —HF, —SH, and the like. Examples of polymerizable monomers having functional groups capable of hydrogen bonding include hydroxyethyl methacrylate, vinyl alcohol, acrylamide, dimethylacrylamide, ethylene glycol, propylene glycol, ethylene glycol monomethacrylate, ethylene glycol monoacrylate, Examples thereof include hydroxyethyl methacrylate and hydroxyethyl acrylate. In particular, hydroxyethyl methacrylate, 2-hydroxyethyl methacrylate, hydroxyethyl acrylate, dimethylacrylamide, and the like, in which hydrogen bonds work strongly, are preferable because the adsorption state of quaternary ammonium salt polymers on erythrocytes is stabilized. These polymerizable monomers can be used individually by 1 type or in combination of 2 or more types.

  As the polymerizable monomer having no quaternary ammonium moiety, a polymerizable monomer having a functional group capable of hydrophobic interaction can also be used. By using such a polymerizable monomer for copolymerization, the same advantageous effect as that in the case of using the polymerizable monomer having a functional group capable of hydrogen bonding described above, that is, the hardness of erythrocytes The effect that it becomes easy to produce an agglomerate is produced. Examples of functional groups capable of hydrophobic interaction include alkyl groups such as methyl, ethyl, and butyl groups, phenyl groups, alkylnaphthalene groups, and fluorinated alkyl groups. Examples of polymerizable monomers having functional groups capable of hydrophobic interaction include methyl methacrylate, methyl acrylate, ethyl methacrylate, ethyl acrylate, propyl methacrylate, propyl acrylate, butyl methacrylate, butyl acrylate, styrene, etc. Is mentioned. In particular, methyl methacrylate, methyl acrylate, butyl methacrylate, butyl acrylate, etc., which have a strong hydrophobic interaction and do not significantly reduce the solubility of the quaternary ammonium salt polymer, are adsorbed to erythrocytes by the quaternary ammonium salt polymer. Is preferable because of stabilization. These polymerizable monomers can be used individually by 1 type or in combination of 2 or more types.

  The molar ratio of the polymerizable monomer having a quaternary ammonium moiety and the polymerizable monomer having no quaternary ammonium moiety in the quaternary ammonium salt copolymer is the quaternary ammonium salt. It is preferable that the red blood cells are appropriately adjusted so as to be sufficiently aggregated by the ammonium salt copolymer. Or it is preferable to adjust so that the streaming potential of a quaternary ammonium salt copolymer may become the value mentioned above. Or it is preferable to adjust so that IOB of a quaternary ammonium salt copolymer may become the value mentioned above. In particular, the molar ratio of the polymerizable monomer having a quaternary ammonium moiety in the quaternary ammonium salt copolymer is preferably 10 mol% or more, more preferably 22 mol% or more, and 32 mol. % Or more, more preferably 38 mol% or more. Further, it is preferably 100 mol% or less, more preferably 80 mol% or less, still more preferably 65 mol% or less, and even more preferably 56 mol% or less. Specifically, the molar ratio of the polymerizable monomer having a quaternary ammonium moiety is preferably 10 mol% or more and 100 mol% or less, more preferably 22 mol% or more and 80 mol% or less, It is more preferably 32 mol% or more and 65 mol% or less, and further preferably 38 mol% or more and 56 mol% or less.

  When the quaternary ammonium salt polymer is a quaternary ammonium salt polycondensate, as the polycondensate, a condensate composed of one or more monomers having the quaternary ammonium moiety described above is used. Polycondensates obtained by polymerizing these condensates can be used. Specific examples include dicyandiamide / diethylenetriamine polycondensate, dimethylamine / epichlorohydrin polycondensate, and the like.

  The above-described quaternary ammonium salt homopolymer and quaternary ammonium salt copolymer can be obtained by a homopolymerization method or a copolymerization method of a vinyl polymerizable monomer. As the polymerization method, for example, radical polymerization, living radical polymerization, living cation polymerization, living anion polymerization, coordination polymerization, ring-opening polymerization, polycondensation and the like can be used. The polymerization conditions are not particularly limited, and the conditions under which the quaternary ammonium salt polymer having the target molecular weight, streaming potential, and / or IOB value can be obtained may be appropriately selected.

  In addition to the polycation (cationic polymer), the hemagglutinating agent used in the present invention includes one third component such as a solvent, a plasticizer, a fragrance, an antibacterial / deodorant, and a skin care agent. It may be provided in the form of a composition (hemocyte aggregating agent composition) containing the above. As the solvent, water, a water-soluble organic solvent such as a saturated aliphatic monohydric alcohol having 1 to 4 carbon atoms, or a mixed solvent of the water-soluble organic solvent and water can be used. As the plasticizer, glycerin, polyethylene glycol, propylene glycol, ethylene glycol, 1,3-butanediol, or the like can be used. As a fragrance | flavor, the fragrance | flavor which has the green herbal-like fragrance described in patent 4776407, the extract of a plant, the extract of citrus fruits, etc. can be used. As an antibacterial / deodorant, it is polymerized from a cancrinite-like mineral containing a metal having antibacterial properties described in Japanese Patent No. 4526271, and a polymerizable monomer having a phenyl group described in Japanese Patent No. 4587928. Porous polymers, quaternary ammonium salts, activated carbon, clay minerals and the like described in Japanese Patent No. 4651392 can be used. As the skin care agent, plant extracts, collagen, natural moisturizing ingredients, moisturizing agents, keratin softening agents, anti-inflammatory agents and the like described in Japanese Patent No. 4084278 can be used.

  The proportion of the cationic polymer in the hemagglutinating agent composition is preferably 1% by mass or more, more preferably 3% by mass or more, and further preferably 5% by mass or more. Further, it is preferably 50% by mass or less, more preferably 30% by mass or less, and still more preferably 10% by mass or less. By setting the proportion of the cationic polymer in the hemagglutinating agent composition within this range, an effective amount of the cationic polymer can be imparted to the sanitary absorbent article.

  Although the present invention has been described above, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention. The present invention can be applied to all articles used for absorption of menstrual blood. Examples of such articles include, but are not limited to, panty liners and tampons in addition to sanitary napkins as in the above embodiment.

1,1A, 1B, 1C, 1D, 1E, 1F Sanitary napkin (physiological absorbent article)
A Front part B Excretion part opposing part C Rear part 2 Surface sheet 20 Surface layer through-hole 21 Surface layer fracture part 22 Surface layer separation part 3 Back sheet 4, 4A Absorber 40, 40A Absorbent core 41 Core wrap sheet 42 Indented part 42S Side wall part 42U Bottom wall part 43 Broken part of core wrap sheet 44 Cut part of core wrap sheet 45 High basis weight part 5 Second sheet 6 Absorbent body 10 Hemagglutinating agent 11 Menstrual blood 12 Liquid component 13 Non-liquid Component 14 Superabsorbent polymer 15 Coating 16 Agglomerate

Claims (5)

An absorbent core having a longitudinal direction corresponding to the wearer's front-rear direction and a lateral direction perpendicular thereto, and having an excretion portion facing portion disposed opposite to the excretion portion of the wearer and comprising a superabsorbent polymer; A sanitary absorbent article comprising a surface layer disposed closer to the wearer's skin than the absorbent core,
The surface layer has a plurality of cuts or through-holes penetrating the surface layer in the thickness direction, and the absorbent core has a recess or a through-hole having an opening on the skin-facing surface of the absorbent core. Are formed, and in a plan view, at least a part of the plurality of cuts or through holes of the surface layer and at least a part of the plurality of recesses or through holes of the absorbent core Overlap,
A sanitary absorbent article in which a hemagglutinating agent is present at a position closer to the wearer's skin than the absorbent core.   The surface layer includes a second sheet and a surface sheet in order from the absorbent core, and the cut or through hole penetrates the laminate of both sheets in the thickness direction, and the non-skin facing surface of the second sheet The sanitary absorbent article according to claim 1, wherein the hemagglutinating agent is provided on the sanitary absorbent article. At least a part of the plurality of cuts or through-holes in the surface layer is located in the excretory part facing part,
The sanitary absorbent article according to claim 1 or 2, wherein a portion defining a notch or a through hole in the surface layer extends inwardly from a recess of the absorbent core or an opening of the through hole. .   The core wrap sheet is arranged over the whole area of the absorbent core on the skin-opposing surface side, and the core wrap sheet is open in the opening, or enters the opening. A sanitary absorbent article according to claim 1.   The sanitary absorbent article according to any one of claims 1 to 3, wherein the opening on the skin-facing surface of the absorbent core is covered with a hydrophilic core wrap sheet.