JP6659242B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as a sanitary napkin.

  As an absorbent article provided with a fragrance, for example, the absorbent articles described in Patent Literature 1 and Patent Literature 2 are known. Patent Literature 1 describes an absorbent article in which a portion provided with a fragrance substance is arranged on an outermost surface in a product thickness direction. According to the absorbent article described in Patent Literature 1, since the portion to which the fragrance substance is applied is arranged on the outermost surface, the fragrance can be sufficiently scented before wearing.

  Patent Document 2 describes an absorbent article in which a fragrance substance is added to an absorber located between a top sheet and a back sheet. According to the absorbent article described in Patent Literature 2, since the fragrance substance is provided to the absorber between the top sheet and the back sheet, the fragrance can be made to permeate continuously.

JP 2014-113302 A JP 2010-110443 A

  However, in the absorbent article described in Patent Literature 1, since the portion provided with the fragrance substance is disposed on the outermost surface, the fragrance is fragrant before wearing, and the fragrance is continuously fragrant before wearing. Is difficult. Further, Patent Literature 1 does not disclose anything about a configuration in which a scent spreads over the entire absorbent article by a body pressure during wearing and an inward pressing force of a wearer's thigh.

  Further, in the absorbent article described in Patent Document 2, since the fragrance substance is given to the absorber between the top sheet and the back sheet, the fragrance is easily scented continuously, while the scent is inside the absorber. It is easy to put on and it is difficult to make the fragrance fragrant. Further, Patent Literature 2 does not disclose anything about a configuration in which a scent spreads over the entire absorbent article by a body pressure during wearing and an inward pressing force of a wearer's thigh.

  Therefore, an object of the present invention is to provide an absorbent article that can solve the above-mentioned disadvantages of the related art.

  The present invention includes a liquid-permeable top sheet that forms a skin-facing surface, a back sheet that forms a non-skin-facing surface, and an absorber interposed between these two sheets. Absorption having an excretion part opposing part arranged opposite, a front part arranged on the wearer's ventral side from the excretion part opposition part, and a rear part arranged on the wearer's back from the excretion part opposition part. An absorbent article comprising a water-soluble main body, a longitudinal direction corresponding to the wearer's front-rear direction, and a lateral direction perpendicular to the longitudinal direction, wherein the topsheet has a plurality of internal spaces protruding toward the skin-facing surface side. It has a skin-side protruding part, the absorber has a plurality of slits in the excretion part facing part, and the absorber has a fragrance disposed inside the excretion part facing part. When the absorber is viewed in cross section along the lateral direction, the slit is It is to provide an absorbent article which the perfume has reached the disposed surface.

  ADVANTAGE OF THE INVENTION According to this invention, while the body pressure at the time of wear and the inward pressing force by a wearer's thigh can spread a fragrance over the whole absorbent article, a fragrance | perfume stands continuously and a fragrance | flavor Can be sufficiently scented.

FIG. 1 is a plan view showing a skin facing surface side (top sheet side) of a sanitary napkin which is a preferred embodiment of the absorbent article of the present invention. FIG. 2 is an end view schematically showing a cross section taken along line II-II of FIG. FIG. 3 is an enlarged perspective view of a main part of the topsheet provided in the sanitary napkin shown in FIG. 1. FIG. 4 is an enlarged schematic sectional view of a main part of the topsheet shown in FIG. FIG. 5 is a plan view of the absorbent body included in the sanitary napkin shown in FIG. 6 (a) and 6 (b) are partially enlarged plan views showing a preferred arrangement of the longitudinal slits in the excretion portion slit region of the absorber shown in FIG. FIG. 7 is an enlarged perspective view of a main part of a topsheet of another embodiment provided with the absorbent article of the present invention.

  Hereinafter, the absorbent article of the present invention will be described with reference to the drawings based on a sanitary napkin 1 (hereinafter, also referred to as “napkin 1”) which is a preferred embodiment thereof. FIG. 1 is a plan view of the napkin 1 of the present embodiment viewed from the top sheet side, and FIG. 2 is a cross-sectional view of the napkin 1 of the present embodiment. As shown in FIGS. 1 and 2, the napkin 1 of this embodiment has a liquid-permeable top sheet 2 that forms a skin-facing surface, a back sheet 3 that forms a non-skin-facing surface, and both sheets 2 and 3. It has an absorbent body 10 with an absorber 4 interposed therebetween.

  As shown in FIG. 1, the absorbent main body 10 of the napkin 1 has an excretion portion facing portion B that is arranged to face the excretory portion (the vaginal opening or the like) of the wearer when worn, and the wearer has a better position than the excretion portion facing portion B. A front part A disposed closer to the abdomen (front side) of the wearer and a rear part C disposed closer to the back side (rear side) of the wearer than the excretion part facing part B. The napkin 1 and the absorbent main body 10 have a vertical direction X corresponding to the front-back direction of the wearer and a horizontal direction Y orthogonal to the vertical direction X. That is, the absorbent main body 10 is divided in the longitudinal direction X in the order of the front part A, the excretion part facing part B, and the rear part C.

  In the present specification, the skin-facing surface is a surface of the napkin 1 or a component thereof (for example, the absorbent main body 10) that faces the wearer's skin when the napkin 1 is worn, and the non-skin-facing surface is A surface of the napkin 1 or a component thereof that faces the side opposite to the skin side (clothing side) when the napkin 1 is worn. The vertical direction X corresponds to the longitudinal direction of the napkin 1 and the absorbent main body 10, and the horizontal direction Y corresponds to the width direction of the napkin 1 and the absorbent main body 10 (a direction orthogonal to the longitudinal direction).

  In the present embodiment, as shown in FIGS. 1 and 2, the napkin 1 further includes, in addition to the absorbent main body 10, a lateral direction from each of both sides along the longitudinal direction X of the excretion portion facing part B in the absorbent main body 10. It has a pair of wing portions 10W, 10W extending outward from Y.

  In the absorbent article of the present invention, when the excretion part facing part B has a wing part 10W like the napkin 1 of the present embodiment, the excretion part facing part B has a longitudinal direction (the longitudinal direction of the absorbent article, (X direction in the middle) means a region having a wing portion 10W (a region sandwiched between a root of one wing portion 10W along the vertical direction X and a root of the other wing portion 10W along the vertical direction X). The excretion part-facing portion in the absorbent article having no wing portion is formed by folding the absorbent article in the lateral direction (the width direction of the absorbent article, (Y direction) of the absorbent article (not shown) means a region surrounded by a first fold curve and a second fold curve counted from the front end in the longitudinal direction X of the absorbent article. .

  In the napkin 1, as shown in FIG. 2, the topsheet 2 covers the entire surface of the absorbent body 4 facing the skin, and extends outwardly in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4. ing. On the other hand, the back sheet 3 covers the entire area of the non-skin-facing surface of the absorber 4, and further extends outward in the horizontal direction Y from both side edges along the vertical direction X of the absorber 4, and the side sheet 5 described later. Together with this, a side flap portion 10S is formed. The back sheet 3 and the side sheet 5 are joined to each other at a portion extending from both side edges along the longitudinal direction X of the absorber 4 by a known joining means such as an adhesive, a heat seal, and an ultrasonic seal. In addition, each of the top sheet 2 and the back sheet 3 and the absorber 4 may be joined by an adhesive.

  In the napkin 1, as shown in FIGS. 1 and 2, the side sheets 5 are arranged on both sides along the vertical direction X on the skin-facing surface of the absorbent main body 10 (the skin-facing surface of the topsheet 2). Preferably, the side sheets 5 are disposed over the entire length of the absorbent main body 10 in the vertical direction X so as to overlap on both left and right sides along the vertical direction X of the absorber 4 in plan view.

  In the napkin 1, the pair of side sheets 5, 5 each include, as shown in FIG. 1, a linear first joining line 61 located at the excretion portion facing portion B, and a vertical X (Front part A and rear part C). The first joining line 61 has a curved shape projecting outward in the horizontal direction Y in plan view, and the second joining line 62 has a linear shape (zigzag) extending alternately in the vertical direction in plan view. Linear). As described above, when the side sheet 5 is joined to the topsheet 2 at the first joining line 61 and the second joining line 62 and is fixed to the skin-facing surface of the absorbent main body 10, as shown in FIG. Inside the first joint line 61 and the second joint line 62 in the lateral direction Y, a space P defined by the side sheet 5 and the top sheet 2 is formed. Since the space P is opened toward the center in the lateral direction Y of the absorbent main body 10, the body fluid such as menstrual blood flowing outward from the center in the lateral direction Y is accommodated in the space P. As a result, leakage of body fluid can be effectively prevented.

  In the napkin 1, as shown in FIG. 1, the side flap portion 10S greatly protrudes outward in the lateral direction Y at the excretion portion facing portion B, and thereby the left and right sides of the absorbent main body 10 along the vertical direction X. A pair of wing portions 10W, 10W extend on both sides. As shown in FIG. 1, the top sheet 2 and the back sheet 3 extend outward in the vertical direction X from the front end and the rear end in the vertical direction X of the absorber 4, and are bonded at their extended portions. They are joined to each other by a known joining means such as an agent, a heat seal, an ultrasonic seal or the like to form an end seal portion.

  The wing portion 10W is used by being folded back to the non-skin-facing surface side of the crotch portion of clothes such as shorts. As shown in FIG. 1, in the napkin 1, the wing portion 10 </ b> W has a substantially trapezoidal shape in which the lower base (the side longer than the upper base) is located on the side of the absorbent main body 10 along the vertical direction X in plan view. It has a shape. As shown in FIG. 2, on the non-skin facing surface of the wing portion 10W, a wing portion adhesive portion 71 for fixing the wing portion 10W (napkin 1) to clothing (not shown) such as shorts is formed. The wing portion adhesive portion 71 allows the wing portion 10W folded back to the non-skin facing surface (outer surface) side of the crotch portion of the clothes to be adhesively fixed to the crotch portion during use. Further, as shown in FIG. 2, a main body adhesive portion 72 (shift preventing portion) for fixing the absorbent main body 10 to clothing such as shorts is formed on the non-skin-facing surface of the absorbent main body 10. .

  In the napkin 1, as shown in FIGS. 1 and 2, the topsheet 2 and the absorber 4 are integrally formed on the skin-facing surface of the absorbent main body 10 (the skin-facing surface of the topsheet 2) toward the backsheet 3. A linear compressed groove 8 is formed. “Linear” in the linear compressed groove 8 means that the shape of the groove (concave portion) is not limited to a straight line in plan view, but includes a curved line. Each line may be a continuous line or a broken line. For example, the linear pressing groove 8 may be constituted by a row formed by a large number of discontinuous point embosses. The linear pressing groove 8 includes a first horizontal pressing groove 81 extending in the horizontal direction Y on the front part A and a rear part C, and a vertical pressing groove 82 extending in the vertical direction X on both sides of the excretion part facing part B. Have. In the napkin 1, the first horizontal pressing grooves 81 of the front part A and the rear part C are curved in a convex shape toward the outside in the vertical direction X, and each vertical pressing groove 82 is directed toward the inside in the horizontal direction Y. It is a convex curved shape. In the napkin 1, the first horizontal compressed groove 81 of the front part A, one vertical compressed groove 82, the first horizontal compressed groove 81 of the rear part C, and the other vertical compressed groove 82 are connected to form a ring-shaped entire circumferential groove. Has formed. Further, in the napkin 1, the linear compressed grooves 8 extend in the vertical direction X more inward than the first horizontal compressed grooves 81 of the front part A and the rear part C, and extend in the horizontal direction Y, respectively. 83. In the napkin 1, the second lateral compressed grooves 83, 83 in the front part A and the rear part C are curved in a convex shape outward in the vertical direction X. In addition, as shown in FIG. 1, none of the second horizontal compressed grooves 83, 83 of the napkin 1 is connected to the pair of vertical compressed grooves 82, 82, but may be connected. The linear compressed groove 8 formed in this way can suppress the diffusion of the bodily fluid in the plane direction of the absorber 4 and effectively prevent the leakage of liquid from around the napkin 1.

  The topsheet 2 of the napkin 1 will be described in detail. As shown in FIGS. 3 and 4, the topsheet 2 has a plurality of skin-side protrusions 21 projecting toward the skin-facing surface and having an internal space S1. Preferably, in the napkin 1, the topsheet 2 has a plurality of skin-side protrusions 21 and a plurality of non-skin-side protrusions 22 protruding toward the non-skin-facing surface and having an internal space S2. When the topsheet 2 is viewed in plan, the skin-side protrusions 21 and the non-skin-side protrusions 22 are arranged alternately and continuously along two different directions intersecting each other. Here, as for the two different directions, it is preferable that an arbitrary first direction in the plane and a second direction intersecting the same intersect at an angle of 30 degrees or more and 90 degrees or less. Intersect at That is, for example, in the napkin 1, one of the two directions is the horizontal direction Y, and the other of the two directions is the vertical direction X. Therefore, when the topsheet 2 is viewed in a plan view, the skin-side protruding portions 21 and the non-skin-side protruding portions 22 are alternately and continuously arranged along the vertical direction X and the horizontal direction Y. In the embodiment shown in FIG. 4, the convex portion viewed from the skin-facing surface side is the skin-side protruding portion 21, and the concave portion is the non-skin-side protruding portion 22. Conversely, the convex portion viewed from the non-skin-facing surface side is the non-skin side protruding portion 22, and the concave portion is the skin side protruding portion 21. Therefore, the skin-side protrusion 21 and the non-skin-side protrusion 22 are partially shared.

  In the napkin 1, as shown in FIGS. 3 and 4, regarding the topsheet 2, the skin-side protruding portion 21 has an annular wall portion 21 </ b> W between its top 21 </ b> T and the opening 21 </ b> H of the internal space S <b> 1. are doing. In addition, the non-skin side protruding portion 22 has a wall portion 22W having an annular structure between the top portion 22T and the opening portion 22H of the internal space S2. In the napkin 1, the skin-side protruding portion 21 and the non-skin-side protruding portion 22 are formed in a truncated conical shape or a hemispherical shape with rounded tops 21T and 22T. It is preferable that the top portions 22 </ b> T of the plurality of non-skin-side protruding portions 22 have a lower fiber density than the surrounding portions and have the through holes 23. In the embodiment shown in FIGS. 3 and 4, the non-skin-side protruding portion 22 has a through hole 23 penetrating the top portion 22T. When the non-skin-side protrusion 22 has the through-hole 23, a part of the top 22 </ b> T of the plurality of non-skin-side protrusions 22 may have the through-hole 23, and the top of the plurality of non-skin-side protrusion 22. All of 22T may have the through hole 23. Further, the topsheet 2 has a non-skin side protruding portion 22 having both a top portion 22T having a through hole 23 penetrating therethrough and a top portion 22T having a low fiber density without the through hole 23. It may be.

  Looking at the skin-side protrusion 21 and the non-skin-side protrusion 22 of the topsheet 2 of the napkin 1 in more detail, the protrusion shape of the skin-side protrusion 21 is hemispherical. The protruding shape is a cone or truncated cone with a rounded top. In addition, the protruding shapes of the skin-side protruding portion 21 and the non-skin-side protruding portion 22 are not limited to the above shapes, and may be any protruding shape. For example, the shape may be a cone, such as a cone, truncated cone, pyramid, truncated pyramid, or oblique cone. In the napkin 1, the skin-side protruding portion 21 and the non-skin-side protruding portion 22 hold a frusto-conical or hemispherical inner space S1 and an inner space S2 having a rounded top portion similar to the outer diameter thereof.

  When the topsheet 2 is viewed in plan from the skin-facing surface side, the wall 21W of the skin-side protrusion 21 has an annular structure centered on the top 21T of the skin-side protrusion 21. When the topsheet 2 is viewed from the non-skin-facing surface side in a plan view, the wall 22W of the non-skin-side protruding portion 22 has an annular structure centered on the top 22T of the non-skin-side protruding portion 22. As shown in FIG. 4, the wall 21W of the skin-side protrusion 21 shares a part with a part of the wall 22W of the non-skin-side protrusion 22. Here, the term “annular” is not particularly limited as long as it forms a series of endless shapes in a plan view of the topsheet 2, and may be any shape such as a circle, an ellipse, a rectangle, and a polygon in a plan view of the topsheet 2. Such a shape may be used. From the viewpoint of suitably maintaining the continuous state of the topsheet 2, a circular or elliptical shape is preferable. Furthermore, speaking of "annular" as a three-dimensional shape, cylindrical, oblique cylindrical, elliptic cylindrical, truncated cone, truncated oblique cone, truncated elliptical cone, truncated square pyramid, truncated oblique pyramid Any ring structure such as a shape may be mentioned, and from the viewpoint of realizing a continuous sheet state, a columnar shape, an elliptical columnar shape, a truncated cone shape, and a truncated elliptical cone shape are preferable.

  The topsheet 2 having the skin-side protruding portions 21 and the non-skin-side protruding portions 22 provided as described above does not have a bent portion, and has a continuous curved surface as a whole. As described above, the topsheet 2 preferably has a structure that is continuous in the planar direction. Here, “continuous” means that there is no small hole other than the intermittent portion or the through-hole 23 formed in the top 22T of the non-skin-side protruding portion 22. However, micropores such as gaps between fibers are not included in the small holes. The small hole including the through hole 23 can be defined as, for example, a hole having a diameter equivalent to a circle of 1.0 mm or more.

  In the napkin 1, when the topsheet 2 is cross-sectionally viewed along one of the two different directions intersecting each other, the internal spaces S1 of the plurality of skin-side protrusions 21 are connected to each other. Preferably, in the napkin 1, each of the internal spaces S1 is not separated (not independent) and, as shown in FIG. 4, for example, a surface along a lateral direction Y which is one of the two directions. When the sheet 2 is viewed in cross section, the internal spaces S1 and S1 of the plurality of skin-side protruding portions 21 that are adjacent to each other in an oblique direction between the vertical direction X and the horizontal direction Y are connected, and the internal spaces S1 and S1 are connected. Are extended in the plane direction formed from the vertical direction X and the horizontal direction Y.

  In the napkin 1, the surface sheet 2 differs in the fiber density of the constituent fibers in the thickness direction. Here, the fiber density refers to the mass of the fiber per unit volume of the topsheet 2. High fiber density means that the amount of fibers present per unit volume of the topsheet 2 is large and the distance between fibers is small. A low fiber density means that the amount of fibers present per unit volume of the topsheet 2 is small and the distance between fibers is large. That is, a portion having a high fiber density has a high capillary force, and a portion having a low fiber density has a low capillary force.

Preferably, in the napkin 1, the fiber density of the wall 21W of the skin-side protrusion 21 is higher than the fiber density of the top 21T of the skin-side protrusion 21. More preferably, in the napkin 1, the fiber density of the top portion 22T including the through-holes 23 formed in the non-skin-side protruding portions 22 is the lowest. That is, the fiber density increases in the order of the top 22T including the through hole 23 <the top 21T of the skin-side protrusion 21 <the wall 21W of the skin-side protrusion 21 (the wall 22W of the non-skin-side protrusion 22). . Therefore, also regarding the capillary force, the capillary force increases in the order of the top 22T including the through-hole 23 <the top 21T of the skin-side protrusion 21 <the wall 21W of the skin-side protrusion 21 (the wall 22W of the non-skin-side protrusion 22). Is getting higher. In this case, the fiber density and the capillary force are in the order of the top 22T including the through hole 23 <the top 21T of the skin-side protrusion 21 <the wall 21W of the skin-side protrusion 21 (the wall 22W of the non-skin-side protrusion 22). May be continuously and gradually increased, or may be gradually increased stepwise.
As described above, the excretion such as menstrual blood absorbed from the skin side of the topsheet 2 is transferred to the non-skin side due to the capillary force difference due to the change in density from the skin side projection 21 to the non-skinside projection 22 of the topsheet 2. The amount of excreted liquid remaining on the skin side surface of the topsheet 2 and the amount of liquid returned can be reduced. Further, since the fiber density of the top portion 22T including the through-holes 23 is low, the excreted liquid is easily transferred to the absorber 4, so that the excretion liquid is absorbed at a higher speed and the fragrance component imparted to the absorber 4 is increased. Is easily diffused from the inside of the napkin 1 as an absorbent article to the outside.

The value of the fiber density of the surface sheet 2, with respect to the top 22T of the non-skin-side projection 22, two / mm ² or more, preferably particularly ten / mm ² or more, 100 / mm ² or less, particularly The number is preferably 80 lines / mm ² or less, specifically, 2 lines / mm ² or more and 100 lines / mm ² or less, and 10 lines / mm ² or more and 80 lines / mm ² or less. Is more preferred. Further it, with respect to the top portion 21T of the skin-side projection 21, 30 present / mm ² or more, preferably particularly 50 present / mm ² or more, 130 present / mm ² or less, in particular, 120 / mm ² or less it is preferable. Specifically, preferably 30 present / mm ² or more 130 present / mm ² or less, further preferably 50 present / mm ² or more, 120 / mm ² or less. As for the wall 21W of the skin-side projection 21 (wall portion 22W of the non-skin-side protruding portion 22), preferably 30 present / mm ² or more, in particular 50 lines / mm ² or more, 200 lines / mm It is preferable that the number is not more than ² , especially 150 lines / mm ² , specifically, it is preferably 30 lines / mm ² or more and 200 lines / mm ² or less, and 50 lines / mm ² or more and 150 lines / mm ^2. It is more preferred that: Fiber density of the top portion 21T of the skin-side projection 21 is measured at a location near the center of the layer thickness T _L1 at the top 21T. Fiber density of the top portion 22T of the non-skin-side protruding portion 22 is measured at a location near the center of the layer thickness T _L2 at the top 22T. Fiber density of the wall portion 21W of the skin-side projection 21 (wall portion 22W of the non-skin-side protruding portion 22) is measured at a position near the center of the layer thickness T _L3 in the wall portion 21W. The method for measuring the fiber density is as follows.

<Measurement method of fiber density>
The cut surface of the topsheet 2, the magnification observation using a scanning electron microscope (adjusted magnification fiber cross section can be measured 30 to 60 present; 150-500-fold) above was, per certain area ⁽² about 0.5 mm) Count the number of cross sections of the fiber cut by the cut surface. Next, it is converted into the number of cross sections of the fiber per 1 mm ² , and this is defined as the fiber density. The measurement is performed at three points, and the average is defined as the fiber density of the sample.
-Scanning electron microscope: JCM-5100 (trade name) manufactured by JEOL Ltd.

  In addition, the compression ratio of the topsheet 2 is preferably 40% or more, particularly from the viewpoint of spreading the scent throughout the absorbent article due to the body pressure during wearing and the inward pressing force of the thigh of the wearer. It is preferably at least 60%, more preferably at most 95%, particularly preferably at most 90%, specifically, preferably at least 40% and at most 95%, more preferably at least 60% and at most 90%. More preferred. The compression ratio of the topsheet 2 can be measured using a KES compression tester. It can be evaluated that the larger the value measured using the KES compression tester, the better the cushioning property. The compression ratio of the surface sheet 2 by the KES compression tester is described in “Standardization and Analysis of Texture Evaluation (Second Edition)” by K. Kawabata, published by The Japan Textile Machinery Society Texture Measurement and Standardization Research Committee (Showa 55) July 10, 2008)], and are physical properties relating to the compression characteristics of the cloth. The method of measuring the compressibility of the topsheet 2 by the KES compression tester is as follows.

<Method of measuring compression ratio>
As a measuring device, a KES-FB3 compression tester manufactured by Kato Tech Co., Ltd. is used. Using this tester, to measure the thickness _{T 0} under 0.5 gf / cm ² load of the sample (surface sheet 2) by the compression area 2 cm ^2. Next, the sample is compressed at a pressing speed of 10 μm / sec. The load increases with compression. Compression is performed until the load becomes 50 gf / cm ² . Then, to measure the thickness _{T m} of a under 50 gf / cm ² load. The value obtained by subtracting the thickness T _m from the thickness T ₀ divided by the thickness T _0, in which the multiplying by 100 to calculate the compression ratio of the surface sheet 2 by the compression tester (%). That is, the compression ratio (%) is calculated from (T ₀ −T _m ) / T ₀ × 100.

Further, the surface sheet 2 has a compression energy of 0.98 mN · m from the viewpoint of spreading the scent throughout the absorbent article by the body pressure at the time of wearing and the inward pressing force by the thigh of the wearer. / cm ² or more, especially preferably at 3.43mN · m / cm ² or more, 9.8 mN · m / cm ² or less, particularly preferably at 6.86mN · m / cm ² or less, specifically more preferably, it is preferably at 0.98mN · m / cm ² or more 9.8mN · m / cm ² or less, 3.43mN · m / cm ² or more 6.86mN · m / cm ² or less . The compression energy of the topsheet 2 can be measured using a KES compression tester. The larger the WC value measured using the KES compression tester, the more the surface sheet 2 can be evaluated as being soft. The method of measuring the compression energy of the topsheet 2 by the KES compression tester is as follows.

<Method of measuring compression energy>
As a measuring device, a KES-G5 handy compression tester manufactured by Kato Tech Co., Ltd. is used. Using this tester, a 5 cm × 10 cm sample (top sheet 2) is prepared and attached to a test table. Next, the material is compressed between steel plates having a circular flat surface with an area of 2 cm ² . The compression speed is 20 μm / sec, and the maximum compression load is 4.9 kPa. The recovery process also measures at the same rate. The compression energy (WC) of the topsheet 2 is represented by the following equation. T _m , T ₀ and P represent the thickness under a load of 4.9 kPa (50 gf / cm ² ), the thickness under a load of 49 Pa (0.5 gf / cm ² ), and the load during measurement, respectively.

Regarding the thickness of the surface sheet 2, the entire thickness of the sheet thickness T _S, local thickness of the surface sheet 2 which is curved to the unevenness when the surface sheet 2 and a side view as shown in FIG. 4 the layer thickness _{T L} a of. The sheet thickness T _S is preferably 0.5 mm or more and 6.0 mm or less, and more preferably 0.9 mm or more and 2.0 mm or less. Within this range, the body fluid absorption rate during use is high, fluid return from the absorber is suppressed, and further, appropriate cushioning properties can be realized.

The layer thickness _TL may be different at each part in the topsheet 2, and the layer thickness T _{L1 at} the top 21 </ b> T of the skin-side protrusion 21> the wall 21 </ b> W of the skin-side protrusion 21 (the non-skin-side protrusion 22). It is preferable that the thickness becomes smaller in the order of the layer thickness T _{L3 at} the wall portion 22W)> the layer thickness T _L2 at the top portion 22T of the non-skin side protrusion 22. Thereby, the fiber density is low at the top 21T of the skin-side protruding portion 21, particularly on the skin-facing surface side, and good skin contact can be realized. On the other hand, the wall portion 21W of the skin-side protruding portion 21 (the wall portion 22W of the non-skin-side protruding portion 22) has a high fiber density, is hard to be crushed, has good cushioning properties without being out of shape, and has excellent liquid absorption speed. The top sheet 2 can be used.

Sheet thickness T _S and the layer thickness T _L is measured by the following method.
The sheet thickness T _S is measured by using a thickness measuring device with a load of 0.05 kPa applied to the top sheet 2. A laser displacement meter manufactured by OMRON Corporation is used as a thickness measuring instrument. In the thickness measurement, ten points are measured, and the average value thereof is calculated to be the thickness. The layer thickness _TL is measured by cutting the topsheet 2 along the thickness direction using a feather razor (product number FAS-10, manufactured by Feather Safety Razor Co., Ltd.). Then, the thickness of each layer is measured by enlarging the cross section of the cut sheet by about 20 times with a digital microscope VHX-900 manufactured by KEYENCE.

The distance between the top 21T of the skin-side protruding portion 21 and the top 22T of the non-skin-side protruding portion 22 which is the closest position when the topsheet 2 is viewed in plan is preferably 1 mm or more and 15 mm or less, more preferably 3 mm or more and 10 mm or less. preferable. The distance L21 (see FIG. 4) between the tops 21T of the skin-side protruding portions 21 adjacent to each other in the lateral direction Y on the topsheet 2 (see FIG. 4) is preferably 2 mm or more and 30 mm or less, more preferably 3 mm or more and 15 mm or less. The distance between the tops 21T of the skin-side protruding portions 21 adjacent to each other in the vertical direction X on the topsheet 2 is preferably 2 mm or more and 30 mm or less, more preferably 3 mm or more and 15 mm or less. The basis weight of the topsheet 2 may be appropriately selected depending on the application. When used as a topsheet for absorbent articles such as sanitary products, the average weight of the entire sheet is 15 g / m ² or more and 50 g / m ² or less. Preferably, it is 20 g / m ² or more and 40 g / m ² or less.

  In the napkin 1, the absorber 4 has a plurality of slits 43 in the excretion part facing part B. Preferably, in the napkin 1, as shown in FIGS. 1 and 5, each slit 43 is arranged parallel to the longitudinal direction X. That is, each slit 43 is a vertical slit extending in the vertical direction X. In the napkin 1, the slits (longitudinal slits) 43 extending in the vertical direction X have the excretion part slit regions 4S formed in a state of being dispersed in both the vertical direction X and the horizontal direction Y. More preferably, as shown in FIG. 5, the absorbent body 4 includes a main absorbent body 40 that forms the outer shape of the absorbent body 4 when viewed from above, and a main absorbent body that is disposed in the excretory portion facing portion B. An auxiliary absorber 41 smaller than the body 40 is provided. As shown in FIG. 2, the absorber 4 is formed by wrapping an auxiliary absorber 41 with a main absorber 40. In the napkin 1, the absorber 4 is formed from a laminate of the absorbent sheets 411 to 412.

  In the napkin 1, the main absorbent body 40 is formed from a single absorbent sheet 411 as shown in FIG. 2, and is disposed on the skin-facing surface side of the auxiliary absorbent body 41 so as to surround the auxiliary absorbent body 41. The two sides of the absorbent sheet 411 along the longitudinal direction X are folded toward the non-skin-facing surface side of the auxiliary absorbent body 41 to form a two-layer structure. The two-layer main absorbent body 40 has a substantially rectangular shape with rounded corners in plan view, and extends from the front part A to the rear part C via the excretion part facing part B. Further, in the napkin 1, the auxiliary absorbent body 41 is formed from a single absorbent sheet 412 as shown in FIG. 2, and one of both side portions along the longitudinal direction X of the absorbent sheet 412 is The central part 41C between the parts is folded toward the skin-facing surface side, and the other of the two side parts is further folded on one of the folded sides to form a three-layer structure. The auxiliary absorber 41 having a three-layer structure has a substantially rectangular shape in plan view, and is disposed in the excretion part facing part B. As described above, the napkin 1 is formed by wrapping the auxiliary absorber 41 having a three-layer structure formed of the absorbent sheet 412 with the main absorbent body 40 formed of the absorbent sheet 411.

  As shown in FIG. 2, the absorbent body 4 formed of the absorbent sheets 411 to 412 is formed of the main absorbent body 40 having a two-layer structure and the auxiliary absorbent body 41 having a three-layer structure at the excretion part facing part B. It has a five-layer middle / high part 42. The portion of the absorber 4 other than the middle and high portions 42 also has a two-layer laminated structure formed by the two-layer main absorber 40. Here, the middle and high section 42 is formed to have a thickness that is thicker than a portion located therearound, and that the excretion section facing section B is formed with a protruding section that protrudes toward the top sheet 2 (the skin facing surface of the napkin 1). Part that is In the napkin 1, as shown in FIG. 2, the middle / high section 42 is a section where the number of laminated sheets of the absorbent sheet constituting the absorber 4 is larger than that of the surrounding area. By disposing the auxiliary absorber 41 having a three-layer structure in a part of the main absorber 40, the absorption capacity of a part of the absorber 4 can be easily and efficiently increased. The layers between the absorbent sheets 411 to 412 may not be joined, or may be partially joined by a partial adhesive arrangement such as a stripe. As described above, since the layers between the absorbent sheets 411 to 412 are not joined or partially adhered, voids are generated between the layers of the absorbent sheets 411 to 412, and the absorbent sheets 411 to 412 Since the surface area of the layer is not reduced, the absorption amount and the absorption rate are maintained, and the voids between the absorbent sheets serve as a route for diffusing the scent, so that the scent can be easily spread over the entire napkin 1.

  The absorber 4 of the napkin 1 has a thickness at the middle and high section 42 of preferably 0.7 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, and more specifically. , Preferably 0.7 mm or more and 5 mm or less, more preferably 1 mm or more and 4 mm or less. By setting the thickness of the middle and high section 42 in such a range, it is easy to achieve both good wearing feeling and high absorption performance in the excretion portion facing section B where the middle and high section 42 is formed. Further, when the absorbent article has a wing portion as in the napkin 1 of the present embodiment, it is easy to prevent the absorbent body 4 from being twisted at the excretion portion facing portion B at the time of mounting. In addition, the absorber 4 has a thickness in a portion other than the middle and high portions 42 of preferably 0.3 mm or more, more preferably 0.5 mm or more, and preferably 3 mm or less, more preferably 2.5 mm or less. More specifically, it is preferably from 0.3 mm to 3 mm, more preferably from 0.5 mm to 2.5 mm. This range is preferable from the viewpoint of enhancing the high absorption performance and the ability to follow the movement of the wearer.

  Further, in the absorber 4 of the napkin 1, the difference in thickness (step) between or near the boundary between the middle and high portion 42 and the peripheral portion is preferably 2 mm or less, and more preferably 1.5 mm or less. . The purpose of this purpose is to suppress the occurrence of twisting near the boundary between the middle and high section 42 and the area where only the main absorber 40 exists around the middle and high section 42 in the excretion part facing section B. If the step is large, when the napkin 1 follows the movement of the wearer during wearing, the napkin 1 tries to fill the gap due to the step, and as a result, the twist may easily occur due to the influence of the step. By setting the value within the above range, the effect of suppressing the occurrence of twisting in the excretion part facing part B is enhanced. The thickness of each part of the above-mentioned absorber 4 is measured by the following method.

<Method of measuring thickness of absorber>
The absorber to be measured is allowed to stand on a horizontal place without wrinkles or bending, and the thickness under a load of 5 cN / cm ² is measured. For measuring the thickness, a dial gauge type thickness gauge (PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG.CO.LTD.)) Is used. At this time, a circular plate or a square plate (an acrylic plate having a thickness of about 5 mm) in plan view is disposed between the tip of the thickness gauge and the measurement portion of the measurement object, and the load is 5 cN / cm ² . Adjust the size of the plate so that

  In the napkin 1, as shown in FIG. 2, the fragrance 9 is disposed inside the absorbent body 4, which is located at the excretion part facing part B. Preferably, the fragrance 9 is applied to the auxiliary absorber 41. More preferably, in the napkin 1, the fragrance 9 is applied to the skin-facing surface of the central portion 41C of the absorbent sheet 412, and at the front and rear ends of the auxiliary absorber 41 in the vertical direction X in parallel with the vertical direction X. Coated throughout. As described above, the auxiliary absorbent body 41 is disposed in the excretory portion facing portion B and is wrapped by the main absorbent body 40, so that the absorbent body 4 of the napkin 1 is located inside the excretory portion facing portion B. And the fragrance 9 is applied to the surface.

  As the fragrance 9 to be applied, any fragrance that can evaporate a fragrance component into the atmosphere under atmospheric pressure may be used, and a normal fragrance capable of perceiving the fragrance under normal temperature and normal pressure environment is used without any particular limitation. And those similar to those conventionally used in the art can be used. For example, as the fragrance 9, a highly volatile fragrance component having a boiling point of about 250 ° C. or less, or a medium volatile fragrance component having a boiling point of about 250 to about 300 ° C. is preferably used.

  Examples of the highly volatile flavor component include, for example, anisole, benzaldehyde, benzyl acetate, benzyl alcohol, benzyl formate, isobornyl acetate, citronellal, citronellol, citronellyl acetate, paracymene, decanal, dihydrolinalool, dihydromyrcenol, dimethylphenylcarbinol, Eucalyptol, 1-carvone, geranial, geraniol, geranyl acetate, geranyl nitrile, nerol, neryl acetate, nonyl acetate, linalool, linalyl acetate, phenylethyl alcohol, α-pinene, β-pinene, γ-pinene, α-yonone , Β-yonone, γ-yonone, α-terpineol, β-terpineol, terpinyl acetate, tentarome, and the like. One of these can be used alone, or two or more can be used in combination. You.

  Examples of the medium volatile flavor component include amyl cinnamaldehyde, methyl dihydrojasmonate, isoamyl salicylate, β-caryophyllene, cedrene, ceryl methyl ether, cinnamon alcohol, coumarin, dimethyl benzyl carbvinyl acetate, ethyl vanillin, eugenol, isogenol Eugenol, γ-methylyonone, heliotropin, hexyl salicylate, cis-3-hexenyl salicylate, phenylhexanol, vanillin, pentalide, and the like can be used, and one of these can be used alone or two or more can be used in combination.

  In addition, as the fragrance 9 to be applied, in addition to the above-mentioned high- and medium-volatile fragrance components, or in addition to these fragrance components, fragrances having a lavender fragrance, a jasmine fragrance, and a ylang-ylang fragrance can be used. The perfume composition contained can also be used. Examples of such a fragrance composition include lavandulol, jasmar, cyclopidene, and the like, and one of these can be used alone, or two or more can be used in combination.

  In addition, the fragrance 9 to be applied is a simple substance of the above-described fragrance composition and a combination of a fragrance material composed of a plurality of fragrances (a fragrance composition) such as a natural essential oil or a blended base. , Those diluted and adjusted with a solvent. " For example, by using a fragrance composition containing a fragrance having a lavender, jasmine, or ylang-ylang-like fragrance as the fragrance 9, the action of the fragrance generated from the fragrance causes particularly mental discomfort among the menstrual symptoms. Thus, it is possible to safely and easily relax the body without giving physical stimulus to the body and irrespective of oral administration. In addition, a feeling of comfort is also obtained.

  The fragrance 9 is applied by diluting the fragrance 9 to be used with an appropriate solvent (for example, water, ethanol, low molecular weight hydrocarbons, liquid LPG gas, dimethyl ether, etc.) or the undiluted solution itself, for example, using an absorbent sheet 412. A method of applying, spraying, or impregnating on the skin-facing surface of the central portion 41C.

  The content of the applied fragrance 9 per one absorbent article is preferably from 0.5 to 10.0 mg, particularly preferably from 1.5 to 5.0 mg.

  Further, in the napkin 1, the ratio of the mass of the applied fragrance 9 to the mass of the auxiliary absorber 41 ((mass of applied fragrance (mg) / mass of auxiliary absorber (mg) × 100)) From the viewpoint of imparting a scent, the content is preferably 0.06% or more, more preferably 0.25% or more, preferably 6.0% or less, and more preferably 2.0% or less. Preferably, it is 0.06% or more and 6.0% or less, more preferably 0.25% or more and 2.0% or less.Fragrance 9 extends in the vertical direction X on both sides of the excretion part facing part B. It is preferable that the perfume 9 is disposed only between the pair of vertical compressed grooves 82, 82. In the napkin 1 of the present embodiment, the perfume 9 is applied only to the absorbent sheet 412 forming the auxiliary absorber 41 of the absorber 4. By processing, the fragrance 9 Only it is disposed between the longitudinal compression grooves 82 and 82.

  In the napkin 1, when the absorber 4 is viewed in cross section along the horizontal direction Y, the slits (vertical slits) 43 reach the surface on which the fragrance 9 is arranged (coated). Here, the surface on which the fragrance 9 is arranged (applied) means, for example, in the napkin 1, the skin-facing surface of the central portion 41C of the absorbent sheet 412 forming the auxiliary absorber 41. In the case where it is difficult to distinguish the surface on which the fragrance 9 is directly applied from the surface on which the fragrance 9 is attached just above the applied fragrance 9, the surface on which the fragrance 9 is attached is also used. 9 is determined as the arranged (coated) surface. Further, when the napkin 1 is viewed in plan from the top sheet 2 side, the fragrance 9 may be provided only on a part of the surface to which the fragrance 9 is applied or adhered. In this case, both the area where the perfume 9 exists and the area where the perfume 9 does not exist exist on the surface to which the perfume 9 is applied or adhered. In this case, "the slit has reached the surface on which the fragrance is disposed (coated)" means that the slit 43 does not need to reach the area where the fragrance 9 is present, and the fragrance 9 is present. This is included even when the area has not been reached. However, it is preferable that the slit 43 reaches a region where the fragrance 9 exists.

In the napkin 1, as shown in FIG. 2, the vertical slits 43 of the absorber 4 not only reach the skin-facing surface of the central portion 41C on which the fragrance 9 is directly applied, but also the thickness of the absorber 4 It penetrates in all directions. However, it is preferable that the slit 43 of the absorber 4 be open at least on the skin surface side, since release of the fragrance component (dissipation of aroma) to the inside and the outside of the absorbent article easily occurs.
Preferably, the vertical slit 43 is formed in the middle and high section 42 on which the fragrance 9 is applied in the excretion part opposing section B, and penetrates the absorber 4 in a region other than the middle and high section 42 in the thickness direction thereof. It is formed by making a notch. As shown in FIG. 5, the excretion part slit area 4S in which the plurality of vertical slits 43 are arranged includes not only the excretion part opposing part B coated with the fragrance 9 but also a part of the front part A and the rear part C. Partial. Since a slight space is formed in the vertical slit 43 and the surface area of the absorbing sheet increases, the excreted liquid from the top sheet 2 is easily taken in, and the cut portion of the vertical slit 43 is cut. The absorption speed is further increased due to the slight compression. In addition, since the vertical slit 43 completely penetrates the absorber 4, the liquid that has reached the absorber 4 can easily reach the non-skin-facing surface side of the absorber 4, and the absorption using the absorber 4 efficiently is achieved. Becomes possible. If the vertical slit 43 reaches the skin-facing surface of the central portion 41C on which the fragrance 9 is directly applied, an opening exists on the skin-facing surface side of the absorber 4 and the high absorption described above. Although a speed can be obtained, it is more preferable that the vertical slit 43 completely penetrates the absorber 4.

  In the napkin 1, as shown in FIG. 1, each vertical slit 43 has a width W43 (see FIG. 5), which is a length in the horizontal direction, and a top portion of the skin-side protrusion 21 adjacent to the top sheet 2 in the horizontal direction Y. 21T are formed narrower than the interval L21 between the 21Ts (see FIG. 4). The distance L21 between the tops 21T, 21T is formed smaller than the distance L43 between the vertical slits 43 in the same slit row extending in the horizontal direction Y (see FIG. 5). Here, the width W43 of the slit refers to the length of the slit in a direction orthogonal to the direction in which the slit extends. In addition, the width of the slit as used herein is the maximum width of the width in a natural state where tension is not applied before the absorbent article is fixed to the crotch portion or the like of the clothes, and the body fluid is absorbed by the absorber 4. It means the width before letting it go. Specifically, when each slit (vertical slit) 43 is viewed in plan, the width W43 of the slit (vertical slit) 43 is preferably 0.1 mm or more, more preferably 0.3 mm or more, and further preferably 1 mm or less, 0.8 mm or less is more preferable, 0.1 mm or more and 1 mm or less are preferable, and 0.3 mm or more and 0.8 mm or less are more preferable.

The ratio ((L21 / L43) × 100) of the distance L21 (see FIG. 4) between the tops 21T of the skin-side protruding portions 21 to the distance L43 between the vertical slits 43 (see FIG. 5) gives a scent to the entire napkin 1. From the viewpoint of spreading effect and high absorbency. It is preferably at least 10%, more preferably at least 30%, preferably at most 70%, more preferably at most 55%, and at least 10% to at most 70%. More preferably, it is 30% or more and 55% or less.
Specifically, in the napkin 1, the interval L43 between the vertical slits 43 (see FIG. 5) is preferably 3 mm or more, more preferably 7 mm or more, and preferably 20 mm or less, more preferably 15 mm or less. Preferably it is 3 mm or more and 20 mm or less, more preferably 7 mm or more and 15 mm or less.

  In the napkin 1, the arrangement of the slits in the excretory part slit area 4S is not particularly limited as long as the slits are arranged in both the vertical direction X and the horizontal direction Y. However, as shown in FIG. In the case where the napkin 1 has the vertical slits 43 along the vertical direction X, it is preferable that a plurality of columns L including a plurality of the vertical slits 43 arranged in series along the vertical direction X of the napkin 1 are formed in the horizontal direction Y. . Further, in the napkin 1, it is preferable that the vertical slits 43 in the columns L, L adjacent to each other in the horizontal direction Y have different positions in the vertical direction X.

  In the napkin 1, the excretion part slit region 4S is formed to include the middle and high part 42 as shown in FIG. In the middle and high section 42, it is preferable that two or more slit rows composed of two or more vertical slits 43 separated in the horizontal direction Y are formed in the vertical direction X, and three or more slit rows are formed in the vertical direction X. More preferably, it is particularly preferable that four or more rows are formed. Further, the number of vertical slits 43 separated in the horizontal direction X included in each slit row is preferably two or more, and more preferably three or more. In the vertical direction X of the excretory part slit region 4S, in addition to the slit row included in the middle and high section 42, one row or two or more slits are provided at the front or rear in the vertical direction X or both at the front and rear of the middle and high section 42. It is preferred to have rows.

  FIG. 6 shows an example of a preferred arrangement of the vertical slits 43 in the excretory part slit area 4S. In the arrangement shown in these figures, a plurality of slit rows R1 and R2 each composed of a plurality of vertical slits 43 separated in the horizontal direction Y of the napkin 1 are formed alternately in the vertical direction X of the napkin 1. In the arrangement example shown in FIG. 6, a slit row R1 composed of two vertical slits 43 separated in the horizontal direction Y and a slit row R2 composed of three vertical slits 43 separated in the horizontal direction Y are arranged in the vertical direction. X are formed alternately.

  In an example of a preferred arrangement of the vertical slits 43 shown in FIG. 6, as shown in FIGS. 6A and 6B, the vertical slits 43 in two slit rows R1 and R2 adjacent in the vertical direction X are The vertical slit 43 of one slit row R1 is arranged at the center between the vertical slits 43 adjacent to each other in the horizontal direction Y in the other slit row R2. There is no space between the slit rows R1 and R2 adjacent to each other in the longitudinal direction X of the napkin 1. That is, no interval is provided between two slit rows R1 and R2 adjacent in the vertical direction X. The expression that there is no space between the adjacent slit rows includes, as shown in FIG. 6A, a case where the positions of the ends of the vertical slits 43 of the adjacent slit rows R1 and R2 match. As shown in FIG. 6B, the case where the ends of the vertical slits 43 of the adjacent slit rows R1 and R2 overlap in the vertical direction X is included. As shown in FIG. 6B, when the ends of the vertical slits 43 of the two slit rows R1 and R2 are arranged in the vertical direction X in an overlapping state, the overlapping length L1 is determined by the length of the slit row. Is preferably 20% or less, and more preferably 10% or less, of the length L2 of the longitudinal slits 43 in the same direction X. In the napkin 1, the length L2 (see FIG. 6) of the vertical slit 43 is preferably 10 mm or more, more preferably 15 mm or more, and preferably 35 mm or less, more preferably 25 mm or less, and preferably It is 10 mm or more and 35 mm or less, more preferably 15 mm or more and 25 mm or less.

  In the napkin 1, as shown in FIGS. 1 and 2, a second sheet 11 made of a nonwoven fabric is disposed between the topsheet 2 and the absorber 4. The second sheet 11 is a sheet separate from the topsheet 2 and the absorber 4 and also called a sublayer sheet in the technical field. The second sheet 11 is a sheet having a role of improving the permeability of the liquid from the top sheet 2 to the absorber 4 and reducing the return of the liquid to the top sheet 2 absorbed by the absorber 4. The second sheet 11 may be disposed on the skin-facing surface of the absorber 4, but the napkin 1 covers the entire area of the skin-facing surface of the auxiliary absorber 41, which is the middle and high part 42 of the absorber 4. The auxiliary absorber 41 extends outward in the horizontal direction Y from both side edges along the vertical direction X. In the napkin 1, the side edge of the second sheet 11 along the vertical direction X is located between the side edge of the auxiliary absorber 41 along the vertical direction X and the side edge of the main absorber 40 along the vertical direction X. ing. Further, the second sheet 11 has the front and rear edges in the vertical direction X located at the front and rear edges in the vertical direction X of the napkin 1 and extends over the entire area of the napkin 1 in the vertical direction X.

  The second sheet 11 is preferably made of a hydrophilic nonwoven fabric or a hydrophilic fiber aggregate. Examples of the nonwoven fabric include an air-through nonwoven fabric, a resin-bonded nonwoven fabric, a spunlace nonwoven fabric, and an air-laid nonwoven fabric. Natural fibers, semi-synthetic fibers, and synthetic fibers can be used as the fibers constituting the nonwoven fabric. Examples of natural fibers include pulp, cotton, hemp and the like. Examples of semi-synthetic fibers include triacetate fibers and diacetate fibers. As the synthetic fibers, single fibers of polyethylene, polyethylene terephthalate, polypropylene, and polyvinyl alcohol, and composite fibers containing two or more of these resins can be used. Examples of the conjugate fiber include a core-sheath type, a side-by-side type, and an eccentric type.

The second sheet 11 preferably has a basis weight of 10 g / m ² or more and 50 g / m ² or less, and more preferably 15 g / m ² or more and 25 g / m ² or less. The thickness of the second sheet 11 is preferably 0.1 mm or more and 5 mm or less.

In the napkin 1, it is preferable that an adhesive is applied and fixed between the top sheet 2 and the second sheet 11, and between the second sheet 11 and the absorber 4. By fixing the top sheet 2, the second sheet 11, and the absorber 4, respectively, it is possible to suppress the displacement and the displacement and improve the feeling of wearing. The adhesive can be applied using a known means, for example, a slot coat gun, a spiral spray gun, a spray gun, or a dot gun. From the viewpoint of spreading the scent over the entire napkin 1, the adhesive is partially adhered. It is preferable to apply in a spiral form using a spiral spray gun. As the adhesive to be applied, for example, a hot melt adhesive is preferably used. The application amount of the hot melt adhesive is preferably 3 g / m ² or more and 10 g / m ² or less.

The forming material of each component of the napkin 1 of the above-described embodiment will be described.
As the topsheet 2, as the raw material nonwoven fabric, an air-through nonwoven fabric having a single-layer structure or a multilayer structure in which a plurality of layers are laminated is preferably used, for example, by the method described in JP-A-2013-133574. Can be used. A configuration in which the topsheet 2 manufactured by the method described in JP-A-2013-133574 has no heat-sealing portion for forming a sheet having the skin-side protrusion 21 and the non-skin-side protrusion 22. It has become.

  As the back sheet 3, various ones conventionally used for the back sheet of the absorbent article can be used without particular limitation. For example, a liquid-impermeable or water-repellent resin film, a resin film and a nonwoven fabric A laminate sheet or the like can be used.

  As the absorbent sheets 411 to 412 constituting the absorbent body 4, water is absorbed between the constituent fibers or between the constituent fibers and the binder via an adhesive force generated in the water-absorbing polymer in a wet state or a binder such as an adhesive or an adhesive fiber added separately. It is preferable to use a material in which a sheet is formed by bonding between the polymer and the conductive polymer. Further, as the absorbent sheet, an absorbent sheet produced by the method described in JP-A-8-246395, a pulverized pulp supplied in an air stream and a water-absorbing polymer are deposited, and then an adhesive (for example, acetic acid) is used. Dry sheet solidified with vinyl adhesive, PVA, etc.), absorbent sheet obtained by applying a hot-melt adhesive between paper and non-woven fabric, and then spraying a super absorbent polymer, spun bond or melt blown non-woven fabric An absorbent sheet or the like obtained by blending a superabsorbent polymer during the production process can be used. One of these absorbent sheets can be cut into a predetermined shape and used as a sheet-shaped absorbent.

  Further, in order to form a slit in the absorbent body 4 like the napkin 1, the laminated body of the absorbent sheet may be partially cut by a known cutting means. A cutting device can be used that includes a cutter roll formed with a large number of cutting blades extending in the circumferential direction and the axial direction of the roll, and an anvil roll receiving the blade of the cutter roll.

  The water-absorbing polymer constituting the absorber 4 includes, for example, sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, sodium polyacrylate crosslinked product, (starch-acrylic acid) graft copolymer, (Isobutylene-maleic anhydride) copolymers and saponified products thereof, polyaspartic acid and the like. Further, it is preferable that each of the absorbent sheets constituting the absorbent body 4 is a water-absorbent sheet containing a water-absorbent polymer, but a water-absorbent sheet containing a water-absorbent polymer and not containing a water-absorbent polymer. A water absorbent sheet may be combined to form a laminate of the water absorbent sheets constituting the absorber.

  As the side sheet 5, various ones conventionally used in the technical field can be used without particular limitation. For example, a liquid-impermeable or water-repellent resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. Can be used. Other materials include, for example, spunbonded nonwoven fabrics, sheets (eg, SM, SMS, SMMS, etc.) in which spunbonded nonwoven fabrics (S) and meltblown nonwoven fabrics (M) are combined, heat-rolled nonwoven fabrics, air-through nonwoven fabrics, and the like. Water-repellent (hydrophobic) nonwoven fabrics can be used. In particular, it is preferable to use a water-repellent spunbonded nonwoven fabric from the viewpoint of making the aroma more efficiently aroma from the center of the product.

  As a method of forming the wing adhesive portion 71 and the main body adhesive portion 72 (offset preventing portion), a method conventionally used for an absorbent article fixed to clothing such as underwear can be used without any particular limitation. For example, the pressure-sensitive adhesive can be formed by directly applying the pressure-sensitive adhesive to the back sheet 3, or can be formed by bonding the other surface of the pressure-sensitive adhesive tape coated with the pressure-sensitive adhesive to the back sheet. Examples of the pressure-sensitive adhesive used for forming the pressure-sensitive adhesive portion include emulsion-based, water-based, and solvent-based pressure-sensitive adhesives. In addition, from the viewpoint of obtaining excellent misalignment prevention performance and stable productivity, it is preferable that the shift preventing portion is formed by applying an adhesive such as a hot melt adhesive. As such a pressure-sensitive adhesive, those usually used for this kind of article can be adopted without limitation, but it is preferable to use a synthetic rubber-based block copolymer having a basic structure similar to natural rubber. . Examples of such a block copolymer include styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-propylene-styrene copolymer (SEPS), and styrene-butadiene-styrene block copolymer (SBS). And styrene-ethylene-butylene-styrene copolymer (SEBS). The pressure-sensitive adhesive preferably contains 10 to 65% by weight, especially 30 to 50% by weight of one or more base polymers selected from these block copolymers. In addition, the deviation prevention part does not need to have adhesiveness as long as the deviation between the absorbent main body and the clothes for fixing the main body can be prevented.

  The linear compressed grooves 8 (the first horizontal compressed grooves 81, the vertical compressed grooves 82, and the second horizontal compressed grooves 83) are pressed with or without heat (so-called embossing) or embossing such as ultrasonic embossing. Can be formed according to a conventional method.

The operation and effect of the napkin 1 will be described.
In the napkin 1, as shown in FIG. 2, the fragrance 9 is applied to the inside of the absorber 4 located at the excretion portion facing portion B. As described above, since the fragrance 9 is not disposed at a position where the fragrance is directly in contact with the outside air, the fragrance component is suppressed from being diffused to the outside of the absorbent article. In the napkin 1, when viewed in cross section as shown in FIG. 2, the slit (vertical slit) 43 reaches the surface on which the fragrance 9 is applied. Here, while the napkin 1 is being worn, the slit (vertical slit) 43 is slightly applied to the excretion portion facing portion B by constantly receiving the body pressure of the wearer and the inward pressing force of the wearer's thigh. It is easy to open and close. Therefore, the fragrance 9 applied to the inside of the absorber 4 can be sufficiently scented through the slight opening of the slit (vertical slit) 43. In particular, since the topsheet 2 of the napkin 1 has the through-holes 23 at the top 22T of the non-skin side protrusion 22, the fragrance inside the napkin 1 is easily diffused to the outside, and the fragrance 9 is further perfumed. be able to. In the napkin 1, the topsheet 2 has a plurality of skin-side protrusions 21 protruding toward the skin-facing surface and having an internal space S1. Therefore, by receiving the body pressure of the wearer and the inward pressing force of the wearer's thigh, the plurality of internal spaces S1 between the topsheet 2 and the absorber 4 are repeatedly deformed, and the airflow is reduced. By the pump effect, the fragrance 9 applied to a part of the absorber 4 can spread the scent over the entire napkin 1.

  Further, in the napkin 1, as shown in FIG. 4, when the top sheet 2 is viewed in cross section along the horizontal direction Y, a plurality of skin-side protrusions adjacent in the oblique direction between the vertical direction X and the horizontal direction Y are provided. The internal spaces S1 and S1 of the part 21 are connected to each other, and the connection between the internal spaces S1 and S1 extends in a plane direction formed by the vertical direction X and the horizontal direction Y. Therefore, the scent can be further spread over the entire surface of the napkin 1 by constantly receiving the body pressure of the wearer and the inward pressing force of the wearer's thigh at the excretion part facing part B.

  In the topsheet 2 of the napkin 1, the fiber density of the wall 21W of the skin-side protrusion 21 is higher than the fiber density of the top 21T of the skin-side protrusion 21 as shown in FIG. Therefore, the convex portion is hard to be crushed by the pressure at the time of mounting, and it is easy to obtain a pump effect because of excellent cushioning property, and it is easy to spread the fragrance of the fragrance 9 over the entire napkin 1. Further, the bodily fluid can be quickly absorbed by the capillary force, and the bodily fluid can be transferred to the absorber 4 through the through-hole 23 formed in the top portion 22T of the non-skin-side protruding portion 22.

  The absorber 4 of the napkin 1 is formed by wrapping an auxiliary absorber 41 coated with the fragrance 9 with a main absorber 40. For this reason, the fragrance 9 is not arranged at a position where the fragrance 9 is directly in contact with the outside air, so that the fragrance 9 can be made to scent more continuously. It is also preferable from the viewpoint of wearer safety. In particular, in the napkin 1, as shown in FIG. 2, the perfume 9 is applied to the skin-facing surface of the lowermost central portion 41C of the three-layer auxiliary absorber 41, and the auxiliary absorber 41 is Since it is wrapped in 40, three absorbent sheets 411 and 412 are stacked on the upper layer of the central portion 41C of the auxiliary absorber 41 coated with the fragrance 9. Therefore, the fragrance can be made to perfume more continuously.

Further, in the napkin 1, as shown in FIG. 2, a second sheet 11 is disposed between the top sheet 2 and the absorber 4, and between each of the napkins 1, from the viewpoint of suppressing twisting and displacement at the time of mounting. It is preferable to be fixed with an adhesive or the like. In addition, by partially fixing them, a scent passage is easily formed between the absorber 4 and the second sheet 11 and also between the top sheet 2 and the second sheet 11, and the entire napkin 1 is formed. The scent can be spread even more. Moreover, since the absorber 4 coated with the fragrance 9 therein is covered with the second sheet 11, the fragrance can be made to permeate more continuously.

As described above, the present invention has been described based on the preferred embodiment. However, the absorbent article of the present invention is not limited to the napkin 1 of the above embodiment, and can be appropriately changed.
For example, as shown in FIG. 3, the topsheet 2 of the napkin 1 has a plurality of skin-side protrusions 21 having an internal space S1 and a plurality of non-skin-side protrusions 22 having an internal space S2. When the topsheet 2 is viewed in a plan view, the skin-side protruding portions 21 and the non-skin-side protruding portions 22 are arranged alternately and continuously along two different directions intersecting each other. What is necessary is just to have the several skin side protrusion part 21 which has the internal space S1. For example, as shown in FIG. 7, a sheet having an uneven structure in which convex ridges 24 and concave ridges 25 each having a streak-like internal space S3 extending in the vertical direction X are alternately arranged in the horizontal direction Y may be used. . Further, the sheet may have an uneven structure in which the ridges 24 and the ridges 25 having the streak-shaped internal space S3 extending in the horizontal direction Y are alternately arranged in the vertical direction X.

  Further, in the napkin 1, as shown in FIG. 2, the second sheet 11 is provided between the topsheet 2 and the absorber 4, but the second sheet 11 may not be provided.

  Further, in the napkin 1, the absorbent body 4 is formed from a laminated body in which the absorbent sheets 411 to 412 are folded, but may be a laminated body in which a plurality of single-sheet absorbent sheets are laminated. In addition, various ways of folding the absorbent sheet can be adopted. In addition, without using the absorbent sheets 411 to 412, an absorbent core, which is usually used for absorbent articles such as sanitary napkins and is made of absorbent polymer particles and a fiber material, is covered with tissue paper. The body can also be used. In the case of using such an absorber, for example, two of the absorbers are prepared, and the fragrance 9 is applied on the skin-facing surface of one of the absorbers, and the fragrance 9 is applied on the absorber on which the fragrance 9 is applied. If the other absorber is arranged to form a laminated absorber, the absorber having the fragrance 9 applied inside is obtained.

  The plurality of slits 43 of the absorber 4 of the napkin 1 are vertical slits as shown in FIGS. 1 and 5, but may be horizontal slits along the horizontal direction of the napkin 1, or may be vertical. It may be a slit extending in an oblique direction having an angle with respect to both the X and Y directions, or a mixture of a vertical slit and a horizontal slit. As shown in FIG. 2, the plurality of slits 43 of the absorber 4 of the napkin 1 penetrate the absorber 4 in the thickness direction, but reach the surface on which the fragrance 9 is applied. It should just be.

  Further, the excretion portion slit region 4S of the absorber 4 of the napkin 1 may be formed only in the excretion portion facing portion B, or may extend from the excretion portion facing portion B to a part of the rear portion C. Alternatively, it may extend from the excretion part facing part B to a part of the front part A and a part of the rear part C. Further, the number of laminated absorbent sheets in the middle and high section 42 may be two or three, or five or more instead of four. Further, the difference in the number of laminated sheets of the absorbent sheet between the middle and high portions 42 and the other portions may be one or three or more. The location of the perfume 9 is preferably provided in the middle / high section 42, but may be provided in the main absorption section 40 alone if provided on the auxiliary absorber 41 of the middle / high section 42. In addition, by arranging the fragrance 9 in a region between the pair of left and right linear compressed grooves 82, 82, the fragrance 9 is easily affected by the body pressure and the inward pressing force by the wearer's thigh when worn. The pump effect can be easily obtained, the fragrance can be easily diffused, and the fragrance can be effectively scented from the center of the product.

  Further, the absorbent article of the present invention may be a sanitary napkin, a panty liner (vegetable sheet), an incontinence pad, or the like.

1 sanitary napkins (absorbent articles)
10B Absorbent main body 10W Wing section 10S Side flap section 10S
2 Top sheet 21 Skin-side protrusion 21T Top of skin-side protrusion 21W Wall of skin-side protrusion S1 Internal space 22 Non-skin-side protrusion 22T Top of non-skin-side protrusion 22W Wall of non-skin-side protrusion S2 Internal space 3 Back sheet 4 Absorber 411, 412 Absorbent sheet 4S Excretion part slit area 40 Main absorber 41 Auxiliary absorber 42 Middle high part 43 Vertical slit 5 Side sheet 61 First joint line 62 Second joint line 71 Wing part adhesive Part 72 Body adhesive part 8 Linear compressed groove 81 First horizontal compressed groove 82 Vertical compressed groove 83 Second horizontal compressed groove 9 Fragrance 11 Second sheet

Claims (7)

A liquid-permeable top sheet that forms the skin-facing surface, a back sheet that forms the non-skin-facing surface, and an absorber interposed between these two sheets, and are arranged to face the excretion part of the wearer when worn. An absorbent body having an excretory portion facing portion, a front portion arranged on the abdomen side of the wearer from the excretory portion facing portion, and a rear portion arranged on the wearer's back side from the excretory portion facing portion. An absorbent article having a vertical direction corresponding to the front-rear direction of the wearer and a horizontal direction orthogonal to the vertical direction,
The topsheet has a plurality of skin-side protrusions having an internal space protruding toward the skin-facing surface,
The absorber has a main absorber and an auxiliary absorber,
The main absorber and the auxiliary absorber are made of an absorbent sheet,
The main absorber forms the outer shape of the absorber,
The auxiliary absorber is disposed at the excretion portion facing portion, is smaller than the main absorber, and is wrapped with the main absorber,
The auxiliary absorber has a multilayer structure in which the absorbent sheet is folded, and each layer of the absorbent sheet is non-joined or partially joined,
A fragrance is disposed inside the auxiliary absorber,
The absorber has a plurality of slits in the excretion part facing part,
The absorbent article in which the slit reaches the surface on which the fragrance is disposed when the absorbent body is viewed in cross section along the lateral direction. The topsheet has the plurality of skin-side protrusions, and a plurality of non-skin-side protrusions that have an internal space that protrudes toward the non-skin-facing surface, and the skin-side protrusion has a top portion and an internal space thereof. Has an annular structure wall between the opening and
When the topsheet is viewed in plan, the skin-side protrusions and the non-skin-side protrusions are arranged alternately and continuously along two different directions that intersect with each other,
2. The absorbent article according to claim 1, wherein when the topsheet is viewed in a cross-section along one of the two different directions intersecting each other, the internal spaces of the plurality of skin-side protrusions are connected.   The absorbent article according to claim 2, wherein the wall density of the wall of the skin-side protrusion is higher than the fiber density of the top of the skin-side protrusion. The topsheet, the is a compressibility of 95% or less than 40%, any one of claims 1 to 3 that compression energy is 0.98mN · m / cm ² or more 9.8mN · m / cm ² or less 2. The absorbent article according to claim 1.   The absorbent article according to any one of claims 1 to 4, wherein a second sheet made of a nonwoven fabric is disposed between the top sheet and the absorber.   The absorbent article according to any one of claims 1 to 5, wherein the slit penetrates the absorber.   The topsheet and the absorbent body are squeezed together, and a pair of left and right squeezed grooves extending along the longitudinal direction are provided on both lateral sides of the absorbent article, and the fragrance is only between the pair of squeezed grooves. The absorbent article according to any one of claims 1 to 6, wherein the absorbent article is arranged.

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