JP2017099563A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which achieves both further excellent performance of preventing lateral leakage of a liquid by a leakage prevention groove and excellent wearing feeling such as soft texture performance and dry feeling by a surface sheet while keeping bulkiness by unevenness of the surface sheet in the vicinity of the leakage prevention groove.SOLUTION: A surface sheet 1 includes uneven surfaces 11A, 11B which do not involve an embossment part and a hollow part, and at least a pair of right and left leakage prevention grooves 6 dented to an absorber 3 are arranged on the surface sheet. The leakage prevention groove has a row 8 in which a plurality of compressed parts 7, where the surface sheet and the absorber are dented in an integrally compressed state, are aligned in a longitudinal direction (a Y direction). Between the compressed parts in the row, at least a part of the uneven surface of the surface sheet exists, and the absorber between the compressed parts is a thin sub-dented part 9. The compressed parts are joined to each other at the sub-dented part. The compressed part has parts that are different in widths from each other in a plane view of the surface sheet in an extending direction of the row. In an absorbent article, the leakage prevention grooves are configured to be bilaterally symmetric with respect to a central line L in a width direction that extends in the longitudinal direction as an axis in the plane view of the surface sheet.SELECTED DRAWING: Figure 1

Description

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

  In absorbent articles such as sanitary napkins, the material and structure of each member have been improved to improve its function and wearing feeling. The surface sheet and the absorbent body as members have also been developed with the aim of such improvement.

For example, Patent Document 1 describes an absorbent article that uses a surface sheet that is formed by partially pressing and bonding two sheets and having an uneven portion. From the standpoint of improving the prevention of leakage and twisting without impairing the uneven shape of the surface sheet, two or more convex portions of the surface sheet are present between the point-shaped embosses in which the surface sheet and the absorber are partially fixed. It is described. That is, the unevenness | corrugation of a surface sheet is hold | maintained by not making embossing linear.
Patent Document 2 describes a bodily fluid absorbent article in which embossed wires are provided in an inner and outer double. It is described that the hardness of the inner embossed wire and the outer embossed wire are made different from the viewpoint of preventing rough skin and preventing leakage.

JP 2009-142402 A JP 2004-113538 A

  From the viewpoint of improving the feeling of wearing, it has been strongly demanded to further soften the surface sheet that touches the skin. The surface sheet described in Patent Document 1 has a pressure-bonding portion and becomes hard at this portion. Therefore, a more bulky and soft material that does not have the pressure-bonding portion is required. However, since the surface sheet tried to compensate for the liquid leakage between the point-like embossments with the liquid trapping property of the pressure bonding part, it would rather prevent the liquid from leaking just by having no pressure bonding part. It becomes difficult to maintain.

Moreover, a softer surface sheet tends to be crushed in the part adjacent to the embossed leak-proof groove. When a surface sheet has both sides unevenness and has a hollow part, it will become especially easy to be crushed. In this case, when incorporated as an absorbent article, the original function of the bulky surface sheet may be impaired and may not be sufficiently exhibited.
As described above, the leak-proof groove is indispensable from the viewpoint of preventing lateral leakage of liquid and twisting, and it is difficult to achieve compatibility with a bulky surface sheet having irregularities.

  Therefore, the present invention maintains the bulkiness due to the unevenness of the surface sheet in the vicinity of the leakage prevention groove, and further improves the excellent liquid side leakage prevention property by the leakage prevention groove and the soft touch and dry feeling by the surface sheet. The present invention relates to an absorbent article that achieves both a good wearing feeling.

  The present invention has a skin contact surface side topsheet, a non-skin contact surface side backsheet, and an absorbent body positioned between the topsheet and the backsheet, An absorbent article having a longitudinal direction extending from the crotch portion to the back side portion and a width direction orthogonal to the longitudinal direction, wherein the top sheet is accompanied by an embossed portion on the skin side surface and the absorber side surface. There are at least a pair of left and right leak-proof grooves that are recessed from the top sheet to the absorber, and the leak-proof grooves are formed with the top sheet. The absorbent body and the absorbent body have a plurality of consolidated portions that are recessed in the consolidated compaction state in the longitudinal direction, and there is at least part of the uneven surface of the topsheet between the consolidated portions of the rows, and The thickness of the absorber between the consolidated portions of the row is thinner than the thickness of the absorber outside the leak-proof groove. Each of the compacted portions is connected to the sub-recessed portions, and the compacted portions have portions having different widths in the extending direction of the rows in the plan view of the topsheet. The pair of left and right leakage prevention grooves provide an absorbent article whose shape is symmetrical with respect to the center line in the width direction extending in the longitudinal direction in a plan view of the topsheet.

  The absorbent article of the present invention maintains a bulkiness due to the unevenness of the surface sheet in the vicinity of the leakage preventing groove, while further preventing liquid side leakage due to the leakage preventing groove, soft touch and dry feeling due to the surface sheet, etc. It is possible to achieve both an excellent wearing feeling.

It is a partially cutaway perspective view schematically showing from the skin contact surface side in a state where a sanitary napkin as a preferred embodiment of the absorbent article in the present invention is extended. It is a partially notched perspective view which shows typically the preferable aspect of the surface sheet in the sanitary napkin of this embodiment. It is a partially notched perspective view which shows typically the other preferable aspect of the surface sheet in the sanitary napkin of this embodiment. (A) is a top view which shows typically the preferable aspect of the leak-proof groove in this embodiment, (B) is a top view which expands and shows a part of leak-proof groove shown to (A). 4A is a cross-sectional view showing a cross section taken along the line RA-RA in FIG. 4B; FIGS. 4B and 1B are cross-sectional views showing a cross section taken along the line RB-RB in FIG. ) Is a cross section taken along the line RC-RC in FIG. (A) And (B) is explanatory drawing which shows typically the pattern which squeezes the protrusion part of a surface sheet by the leak-proof groove of this embodiment, (C) is by the conventional linear leak-proof groove. It is explanatory drawing which shows typically the pattern which squeezes the protrusion part of a surface sheet. (A)-(C) are top views which show the other specific example of the shape of the compaction part in the leak-proof groove of this embodiment. It is explanatory drawing which shows typically the relationship between the separation distance of a compaction part, and the uneven | corrugated pitch of a surface sheet. (A) is a top view which shows typically another preferable aspect of the leak-proof groove in this embodiment, (B) is a top view which expands and shows a part of leak-proof groove shown to (A). . (A)-(C) are top views which show the other specific example of the shape of the compaction part in the leak-proof groove of this embodiment. 9A is a cross-sectional view taken along the line RA-RA in FIG. 9A, FIG. 9B is a cross-sectional view taken along the line RB-RB in FIG. 9A, and FIG. It is a section which shows a RC-RC line section. (A) arranges a plurality of leak-proof grooves of this embodiment on both side portions in parallel in the excretory part corresponding region, and in the leak-proof grooves adjacent to each other on both side parts, the respective compaction parts are shifted in the longitudinal direction. It is a top view which shows typically the state arranged with the pitch, (B) is the elements on larger scale of (A). It is explanatory drawing which shows typically arrangement | positioning in case two or more leak-proof grooves are arranged. (A) And (B) is explanatory drawing which shows typically the deformation | transformation when the external force from the width direction in the case of the arrangement structure of the leak-proof groove of FIG. 13 is applied, (C) and (D) FIG. 5 is an explanatory view schematically showing deformation when an external force is applied from the width direction in the case of the arrangement configuration of the leak-proof grooves in FIG. 1. (A) And (B) is a figure which shows the planar shape of the leak-proof groove in the sample of Example 1 and the comparative example 1, (C), (D), and (E) are the samples of the said leak-proof groove vicinity. It is the drawing substitute photograph which imaged the cross section. (A)-(C) is a drawing-substituting photograph shown with the L value measured in the vicinity of the leak-proof groove when the liquid residue test was performed in Example 1 and Comparative Examples 1 and 2, and (D)- (F) is a drawing-substituting photograph showing the state at the time of liquid injection in the leakage prevention test of Example 1 and Comparative Examples 1 and 2, and (G) to (I) are Example 1 and Comparative Example 1. 2 is a drawing-substituting photograph showing a state of the outside of the leak-proof groove at the time of injection.

First, a sanitary napkin (hereinafter also referred to as a napkin) 10 as a preferred embodiment of an absorbent article in the present invention will be described with reference to the drawings.
A napkin 10 shown in FIG. 1 includes a top sheet 1 on the skin contact surface side, a back sheet 2 on the non-skin contact surface side, and an absorbent body 3 positioned between the top sheet 1 and the back sheet 2. In the present embodiment, side sheets 4 are further laminated on both sides of the surface sheet 1 on the skin contact surface side. The side sheet 4 and the back sheet 2 extend outward in the width direction of the absorber 3 to form a wing portion 5 that is a fixing means to the underwear or the like of the napkin 10. In the laminated structure of the sheet, the outer peripheral edge of the napkin 10 is an outer peripheral seal portion 10A that is joined without the absorbent body 3 interposed.

The topsheet 1 has a bulky structure including a concavo-convex surface without an embossed portion and a hollow portion on the skin side surface and the absorber side surface (non-skin contact surface side). The embossed portion referred to here is a portion provided in the surface sheet, which has a higher density than the periphery thereof and where the fibers are fused together, and this portion does not reach the absorber. Therefore, in other words, the embossed portion is a densified fusion portion that is provided on the top sheet and does not reach the absorber. Therefore, the pressing part 6 mentioned later is distinguished from the embossed part said here. As a surface sheet which has a bulky structure provided with the uneven surface and hollow part which do not accompany an embossed part, it describes in Unexamined-Japanese-Patent No. 2013-133574, for example. Thereby, the surface sheet 1 is soft as the part which touches a wearer's skin directly, air permeability is good, and it is hard to produce a liquid residue with quick liquid permeability.
On the surface sheet 1, a pair of leakage prevention grooves 6 recessed from the surface sheet 1 to the absorber 3 are arranged on the left and right sides at least on both sides in the longitudinal direction. The pair of left and right leak-proof grooves 6 and 6 have a row 8 in which a plurality of compacted portions 7 in which the topsheet 1 and the absorber 3 are recessed in an integrated compacted state are arranged in the longitudinal direction (Y direction). In the row 8, between the consolidated portions 7 and 7, a portion where the thickness of the absorbent body 3 is thinner than the thickness of the absorbent body 3 outside the leak-proof groove 6 is a sub-recessed portion 9 connected to the consolidated portion 7. The leak-proof groove 6 has a linear groove formed by connecting the consolidated portions 7 with the sub-recessed portions 9. Since the sub-recessed portion 9 is not a portion where the topsheet 1 and the absorber 3 are pressure-bonded, at least a part of the uneven surface of the topsheet 1 exists. Therefore, the sub-recessed portion 9 is not as rigid as the consolidated portion 7 and gives the leakage preventing groove 6 with flexibility. In addition, the thickness of the absorber 3 is thinner than the thickness of the absorber outside the leak-proof groove 6 in the sub-recessed portion 9 due to the influence of the consolidated portion 7.
Further, each consolidated portion 7 has portions with different widths in the extending direction of the rows 8 in the plan view of the topsheet 1. Thereby, the leak-proof groove 6 has a portion in which the width of the groove is narrow on the row 8. In addition, the leak-proof groove 6 is bilaterally symmetric about the width direction center line L extending in the longitudinal direction of the napkin 10 in the plan view of the topsheet 1. Thereby, it becomes the napkin 10 which has the area | region where the said bulky structure of the surface sheet 1 was fully maintained in parts other than the leak-proof groove 6 including the periphery of the leak-proof groove 6 widely. And since the leak-proof groove 6 forms the linear groove | channel of a longitudinal direction, having a soft part between the compaction parts 7 and 7, it becomes the thing excellent in leak-proof property.
Details of the bulky structure of the top sheet 1 and the leak-proof groove 6 will be described later.

  The napkin 10 has a vertically long shape having a longitudinal direction (Y direction) and a width direction (X direction) orthogonal to the longitudinal direction. A longitudinal direction is a direction which connects a wearer's skin side part and back side part via a crotch part at the time of mounting | wearing of the napkin 10. FIG. That is, when wearing the napkin 10, the topsheet 1 side is directed to the wearer's skin side, the longitudinal direction is arranged from the wearer's lower abdomen through the crotch part to the back side, and the width direction is left and right. It is worn with the feet facing the direction that connects them. At that time, the wing portions 5 and 5 are bent and wound around the crotch portion of the underwear, and the napkin 10 is fixed by an adhesive portion (not shown) included in the wing portion 5.

  The napkin 10 has the excretion part corresponding | compatible area | region C arrange | positioned corresponding to a wearer's excretion point. Furthermore, it can be classified as a front part F arranged in the lower abdomen in front of the excretory part corresponding region C, and as a rear part R arranged on the rear hip side. Further, in the width direction of the excretion part corresponding region C, a region that directly receives excretion fluid, which is particularly inward of leakage preventing grooves 6 and 6 described later, is referred to as a liquid reception region C1. In the present embodiment, these three regions are regions in which the napkin 10 is divided into three equal parts in the longitudinal direction, and the region with the wing portion is the excretory portion corresponding region. This division can be set in accordance with the size of the absorbent article that varies depending on the purpose of use and the like. For example, when the napkin is formed symmetrically in the front-rear direction such as a daytime napkin, the excretion part corresponding region is the central part when the napkin is divided into three equal parts in the vertical direction. A night napkin or the like has a wide left and right rear flap that covers the buttocks at the rear, and therefore the excretory part corresponding region is closer to the front center when the napkin is divided into two equal parts in the longitudinal direction. In addition, regardless of whether it is daytime or nighttime, when a wing that is bent and fixed to the crotch part of the shorts is provided, the region where the wing exists becomes the excretion region corresponding region. On the other hand, when the wing portion is not provided, the excretory portion corresponding region is generally a central region when the napkin 10 is divided into three equal parts in the longitudinal direction Y.

  In the present invention, unless otherwise specified, the side in contact with the human body is referred to as the skin surface side or the skin contact surface side or the surface side, and the opposite side is referred to as the non-skin surface side or the non-skin contact surface side or the back surface side. That's it. The direction positioned on the front side of the human body when worn is referred to as the front, and its end is referred to as the front end, and the direction positioned on the rear is referred to as the rear, and the end is referred to as the rear end. Moreover, the normal line direction of the surface or back surface of an absorbent article is called thickness direction, and the quantity is called thickness.

  Next, the top sheet 1 will be described.

The topsheet 1 has a concavo-convex surface 11 without an embossed part on each of the skin side surface Z1 and the absorber side surface (non-skin side surface) Z2 (the concavo-convex surface 11A for the skin side surface Z1 and the one on the absorber side surface Z2). It may be distinguished from the uneven surface 11B). In addition, the uneven | corrugated surface 11 means the part except the part directly squeezed by the leak-proof groove mentioned later. In the present embodiment, the concavo-convex surface 11 is disposed on the entire surface sheet 1 other than the leak-proof groove 6.
The topsheet 1 has a thickness due to the uneven surfaces 11 on both sides, and has a hollow portion in the thickness portion. Due to the uneven surface and the hollow portion, the surface sheet 1 is bulky and soft to the touch, and is excellent in air permeability. Moreover, since the uneven surface has no embossed portion, there is no hardened portion, the deformation due to body pressure is smooth, and the followability to the skin and the fit property are excellent. Such a surface sheet 1 is particularly preferably an air-through nonwoven fabric formed by an air-through method. Moreover, it is preferable that the surface sheet 1 consists of one nonwoven fabric from a soft viewpoint.

  A specific example of the topsheet 1 will be described with reference to FIGS. However, the surface sheet 1 is not limited to the form of FIG.2 and FIG.3, If both surfaces have a hollow part with the uneven surface which does not accompany embossing, and a bulky thing can take various forms.

The topsheet 1A shown in FIG. 2 has a first protrusion 21 on the skin side surface Z1 and a second protrusion 22 on the absorber side surface Z2 that protrudes in the opposite direction to the first protrusion 21. A plurality of first protrusions 21 and second protrusions 22 are alternately arranged in different directions intersecting in plan view. The different directions are, for example, the longitudinal direction (Y direction) and the width direction (X direction) of the napkin 10. However, the different directions that intersect are not limited to the orthogonal X and Y directions, but include different directions that intersect at various angles. A plurality of such alternate arrangements are arranged in the sheet plane direction. In this plurality of arrangements, it is a staggered arrangement in which the alternate arrangement of the first protrusions 21 and the second protrusions 22 is shifted by a half pitch between the adjacent parallel running arrays. It is preferable from the viewpoint of making the load of pressure as uniform as possible and improving shape retention.
The 1st protrusion part 21 has the hollow part 21K, and the 2nd protrusion part 22 has the hollow part 22K. The hollow portion 21K of the first projecting portion 21 is an internal space opened at the absorber side surface Z2, and forms a recess in the absorber side surface Z2 (hereinafter also referred to as an absorber-side recess 21K). The hollow portion 22K of the second projecting portion 22 is an internal space opened at the skin side surface Z1, and forms a recess in the skin side surface Z1 (hereinafter also referred to as a skin side recess 22K). Thereby, the skin side surface Z1 of the surface sheet 1 has the uneven | corrugated surface 11A by which the 1st protrusion part 21 and the skin side recessed part 22K were alternately distribute | arranged alternately by each in the different direction which planar view crosses. Moreover, the absorber side surface Z2 of a 1st nonwoven fabric sheet has the uneven | corrugated surface 11B by which the 2nd protrusion part 22 and the absorber side recessed part 21K were alternately distribute | arranged alternately in each different direction which planar view crosses.

  The top sheet 1A has a structure in which the first projecting portion 21 and the second projecting portion 22 are connected in the plane direction without an embossed portion, except for a leakage prevention groove 6 described later. Further, the top sheet 1A of the present embodiment does not have a bent portion, and is configured by a continuous curved surface as a whole. Here, “continuous” means that there are no broken portions of fibers or through holes. This through-hole does not mean a fine hole such as a gap between fibers, but is a portion where fibers are cut off. For example, a hole having an equivalent circle diameter of 1 mm or more can be defined as a through hole. The topsheet 1A does not have such a through hole.

  In this embodiment, the 1st protrusion part 21 and the 2nd protrusion part 22 are made into the truncated cone shape or hemisphere which rounded the top part. That is, each of the first projecting portion 21 and the second projecting portion 22 is not a streak but an independent dome-shaped projecting shape. The first projecting portion 21 and the second projecting portion 22 are not limited to the above-described shapes, and may have any form as long as they are independent projecting shapes, for example, various cone shapes (in this specification, cones It is practical that the shape includes a cone, a truncated cone, a pyramid, a truncated pyramid, an oblique cone, etc.). In the present embodiment, the internal spaces 21K and 22K of the first protrusion 21 and the second protrusion 22 are frustoconical or hemispherical spaces with rounded tops similar to the outer diameters of the protrusions.

  In the skin side surface Z1 and the absorber side surface Z2 of the topsheet 1A, the opening portions of the hollow portion 21K and the hollow portion 22K are ridge portions 23 that connect the first projecting portions 21, 21 and the second projecting portions 22, 22. It is an independent space separated. In the sheet thickness direction of the topsheet 1, the first protruding portion 21 and the second protruding portion 22 are connected via a wall portion 24, and the wall portion 24 divides the internal spaces 21 </ b> K and 22 </ b> K. The wall portion 24 has a shape that is annular in the plane direction so as to surround the internal space, and the ring is continuous in the sheet thickness direction. The “ring” here is not particularly limited as long as it has an endless series of shapes in plan view, and may be any shape such as a circle, an ellipse, a rectangle, or a polygon in plan view. In order to maintain the continuous state of the sheet suitably, a circle or an ellipse is preferable. The top sheet 1 in FIG. 2 has a sheet structure in which both protruding portions are continuous via the wall portion 24 and the ridge portion 23.

  Moreover, the wall part 24 has the fiber orientation along the standing direction in any point along a ring. In other words, the wall 24 has a radial fiber orientation that converges toward the vertex 22T of the second protrusion 22 in relation to the second protrusion 22. Specifically, the fiber orientation described in paragraphs [0014] to [0020] of JP2012-136790A.

  In the sheet thickness when the whole surface sheet 1A is viewed, the first protruding portion 21, the wall portion 24, and the second protruding portion 22 are typically defined as portions divided into three equal parts. These thicknesses are naturally determined by the sheet thickness (P1 = P2 = P3). However, when the kurtosis or curvature of the top of the first protrusion 21 and the second protrusion 22 is different, a relatively narrow portion that is linear in the cross section is used as the wall 24, and is curved and rounded therefrom. It is good also considering the going area as the 1st protrusion part 21 and the 2nd protrusion part 22, respectively. In the latter definition, for example, when the first protrusion 21 is a gentle curved surface having a smaller curvature (larger radius of curvature) than the second protrusion 22, the second protrusion 22 is the first protrusion. 1 is long in the thickness direction of the sheet, and the whole is biased in the thickness direction.

The top sheet 1A has excellent cushioning properties.
The surface sheet 1A has a three-dimensional cushioning property that makes contact with other members, skin, etc. in a small area on both sides, and flexibly deforms following the three-dimensional movement of the members and skin. . Moreover, by having the hollow portions 21K and 22K, the touch when the skin touches the top sheet 1A becomes a soft cushioning property. In addition, the first projecting portion 21 and the second projecting portion 22 can be independently deformed without interfering with each other due to the interposition of the wall portion 24 and have a three-dimensional cushioning property. Further, the annular wall portion 24 connects the first projecting portion 21 and the second projecting portion 22 to disperse the stress applied to one projecting portion in an annular shape, thereby reducing the ripple to the other projecting portion. Thereby, it has the cushioning property which the surface sheet 1A whole does not collapse completely. In addition, due to this stress distribution, the shape retention of the entire topsheet 1A is high, and the shape restoring force is large even when crushed. In addition, the wall 24 has a fiber orientation along the standing direction at any point of the ring as described above, so that a firm stiffness is produced and the cushioning property is enhanced.
As a result, the top sheet 1A is unlikely to lose its initial cushioning property even if the packing state and wearing of the napkin 10 are continued, for example.

The top sheet 1A is highly liquid permeable and hardly retains liquid, and has excellent air permeability.
The top sheet 1A has a bulkiness that separates the skin and the absorbent body by the protruding portions on both sides, and has excellent liquid permeability due to the hollow portions 21K and 22K on both sides, so that the liquid hardly remains. At the same time, the permeated liquid is difficult to return to the skin side. Furthermore, the contact area with the skin is suppressed by the state where both surfaces are in contact with each other in a small area and the hollow portions 21K and 22K, and the air permeability is excellent. As a result, after a urine, stool, menstrual blood, and excretion of the urine, a very smooth and dry feeling can be sustained widely.
Particularly, in the plurality of independent hollow portions 21K and 22K, the excretory liquid can be dispersed and collected and quickly separated from the skin. Thereby, it can be quickly delivered to the absorber 3 without retaining the liquid on the surface of the topsheet 1A. Specifically, when the excreta is high in viscosity such as menstrual blood or loose stool and has low permeability, it is once dispersed and collected into the skin side concave portion (hollow portion of the second protruding portion) 22K of the skin side surface Z1. It is possible to effectively suppress contact with the skin. In addition, the liquid once collected is taken in and collected from the wall 24 into the internal space 21 </ b> K of the first protrusion 21. Further, when the excrement is low in viscosity of clay such as urine and has high permeability, it is directly permeated from the first projecting portion 21, and the absorber-side concave portion (the hollow of the first projecting portion 21 is formed on the absorber side surface Z <b> 2. Part) 21K is also taken in. Thereby, excrement dispersion collection in laminated nonwoven fabric 10 is promoted, and it is efficiently handed over to absorber 3, and has high liquid permeability.

  The topsheet 1 may be a topsheet 1B as shown in FIG. 3, for example, in addition to the topsheet 1A.

In the topsheet 1B shown in FIG. 3, the third protrusion 25 on the skin side surface Z1 (corresponding to the first protrusion 21 in FIG. 2) and the fourth protrusion 26 on the absorber side surface Z2 (second protrusion in FIG. 2). 22) has a streak-like protruding shape extending in the longitudinal direction (Y direction). The 3rd protrusion part 25 and the 4th protrusion part 26 protrude in the mutually opposite direction, and are arrange | positioned alternately in the width direction (X direction), and have a waveform shape like a tin.
The 3rd protrusion part 25 has the hollow part 25K, and the 4th protrusion part 26 has the hollow part 26K. The hollow portion 25K of the third projecting portion 25 is an internal space opened at the absorber side surface Z2, and forms a streak-like recess on the absorber side surface Z2 (hereinafter also referred to as an absorber-side recess 25K). The hollow portion 64K of the fourth projecting portion 26 is an internal space opened at the skin side surface Z1, and forms a streak-like concave portion of the skin side surface Z1 (hereinafter also referred to as a skin side concave portion 26K). Thereby, the skin side surface Z1 of the topsheet 1B has a concavo-convex surface 11A in which a plurality of third projecting portions 25 and skin-side concave portions 26K extending in the longitudinal direction are alternately arranged in the width direction. Moreover, the absorber side surface Z2 of a 1st nonwoven fabric sheet has the uneven surface 11B by which the 4th protrusion part 26 extended in a longitudinal direction and the absorber side recessed part 25K were alternately arranged with two or more by the width direction.
The surface sheet 1B also has a continuous curved surface without a bent portion, with the third protrusions 25 and the fourth protrusions 26 continuously and continuously without an embossed portion, except for a leakage prevention groove 6 described later. It is configured. Thereby, the surface sheet 1B has the bulkiness which separates skin and an absorber, and has the outstanding cushioning property. Further, due to the bulkiness and liquid permeability due to the hollow portion, the liquid hardly remains and the liquid does not easily return. In addition, it has excellent breathability and tends to sustain a dry feeling when worn.

The napkin 10 includes the top sheet 1 as described above, and has at least a pair of leakage preventing grooves 6 that are partially recessed from the top sheet 1 to the absorber 3 on the top sheet 1.
The leak-proof groove 6 is a portion where the constituent fibers of the member are pressure-bonded and compressed by pressing. Blocks the liquid in the width direction by pressure bonding. In addition, the capillary force is higher than the other parts due to the consolidation, and the force to draw the liquid into the thickness direction acts strongly. Accordingly, the leak-proof groove 6 fulfills a blocking function against liquid transfer.

  Next, the leakage preventing groove 6 will be described below. In the present specification, the “consolidated portion” is a recessed portion having a higher density than its surroundings, and typically, as in this embodiment, pressure is applied to the member to increase the density. It is created by the method.

  As described above, the leak-proof groove 6 has a row 8 in which a plurality of compacted portions 7 formed by pressing the top sheet 1A and the absorbent body 3 are arranged in the longitudinal direction. Between the consolidated portions 7 and 7 on the row 8, there is a sub-recessed portion 9, and each of the consolidated portions 7 and 7 is connected by the sub-recessed portion 9. The leak-proof grooves 6 and 6 are symmetrical with respect to the center line L in the width direction extending in the longitudinal direction. In the present embodiment, the leak-proof groove 6 is arranged to extend in the longitudinal direction at positions on the left and right sides of the excretory part corresponding region C. However, the arrangement of the leak-proof groove 6 is not necessarily limited to the excretion part corresponding region C, and may extend from the excretion part corresponding region C to the front part F and the rear part R.

  Further, in the present embodiment, each of the leakage preventing grooves 6 and 6 has one large gentle arch (bow) shape whose overall shape is curved outward in the width direction of the napkin 10. This arch shape enhances the tension relaxation action by the wave shape described later, and works to absorb and relax the pressure in the width direction when the napkin 10 is installed as a whole. Thereby, the twist of the member structure of the liquid receiving region C1 is suppressed, and the bulky structure of the double-sided uneven surface provided with the hollow portion of the topsheet is preferably maintained even during mounting. In the leakage prevention groove 6, “rows in which a plurality of the compacted portions 7 are arranged in the longitudinal direction” may be any row in the longitudinal direction (Y direction) as a whole, and may be a straight line along the longitudinal direction (Y direction). It is not limited to the sequence. For example, as in the present embodiment, a row that extends in the longitudinal direction while being partially curved is included.

  A specific example of such a leak-proof groove 6 will be described below with reference to FIGS. However, the leak-proof groove 6 is not limited to these forms, and has a compacted portion 7 having a portion with a different width and a sub-recessed portion 9, and can maintain the bulky structure of the topsheet 1. Any form can be used. Moreover, the consolidation parts 7 and 7 may be spaced apart in the extending direction of the row 8, or may be partially in contact with the front and rear ends.

First, FIG. 4A shows a leakage prevention groove 6A as an example.
4A has a row 8 in which a plurality of circular compacted portions 7 are arranged with a separation length T interposed therebetween. In the part of the separation length T, the sub-recessed portion 9 that is depressed by the tensions F1 and F1 between the consolidated portions 7 and 7 is disposed (see FIG. 4B).

  In the consolidated portion 7, as shown in FIGS. 5A and 5B, the topsheet 1 and the absorber 3 are in an integrated consolidated state, and have higher rigidity than the other portions. This portion of the surface sheet 1 is particularly referred to as a pressure-bonding portion 16 of the surface sheet 1, and this portion of the absorber 3 is referred to as a pressure-bonding absorption portion 31. The pressure-bonding portion 16 and the pressure-bonding absorbing portion 31 of the surface sheet 1 are pressure-bonded and integrated, and the fiber density is increased. Therefore, strong capillary force works in this part, and the drawability of the liquid to the crimping | compression-bonding absorption part 31 is high.

  On the other hand, the sub-recessed portion 9 is not directly compressed, and the action of the tensions F1 and F1 between the consolidated portions 7 and 7 when the consolidated portions 7 and 7 aligned in the extending direction of the row 8 are formed ( This is a portion formed according to FIG. That is, the absorber 3 is pressed by the tension (F1, F1) and the backing sheet (not shown) that wraps the pulp of the top sheet 1 or the absorber 3 is stretched, and the thickness is reduced and the portion is depressed. As shown in FIG. 5A, this recess is connected to the compacted portion 7 to form a continuous groove (linear recess) of the leakage preventing groove 6A. As shown in FIGS. 5A and 5C, the thickness H3 of the sub-recessed portion 9 is thinner than the thickness H1 of the outer portion of the leakage preventing groove 6A, particularly the portion of the liquid receiving region C1, and the skin contact surface. It is sufficient that the thickness is concave on the side. At this time, the thickness H3 of the sub-recessed portion 9 may be the same as or different from the thickness H2 of the consolidated portion 7.

  As shown in FIG. 5 (A), the sub-recessed portion 9 has an extended portion 17 of the topsheet 1 extended by tensions F1 and F1, and a compression absorbing portion 32. Since the sub-indentation part 9 is not formed by pressing, the topsheet 1 and the absorbent body 3 are not in an integrated compaction state and are more flexible than the compaction part 7. That is, each of the extending portion 17 and the compression absorbing portion 32 of the topsheet 1 can be independently deformed, and functions as a flexible portion of the leak-proof groove 6 </ b> A at a position adjacent to the rigid consolidated portion 7.

  In the sub-recessed portion 9, the elongated portion 17 of the topsheet 1 is not squeezed even if it is stretched by the tensions F <b> 1 and F <b> 1. As this uneven surface 11, at least one of the uneven surface 11 </ b> A on the skin side surface of the top sheet 1 and the uneven surface 11 </ b> B on the side surface of the absorbent body only needs to be present in any part of the sub-dent portion 9. In that case, there may be a state in which any one of the hollow portions (21K, 22K, 25K, 26K) is contracted or does not remain. Since the uneven surface 11 is not formed into a fiber film by pressing, the liquid permeability between the fibers is good in the leak-proof groove 6. This, combined with the liquid trapping property due to the position recessed from the liquid receiving region C1 and the liquid trapping property on the uneven surface described above, improves the liquid permeability in the leakage preventing groove 6A, and the liquid remaining Reduce.

  Further, in the sub-recessed portion 9, the density of the compression absorbing portion 32 is higher than that of the absorber 3 portion outside the leakage preventing groove 6A, and the capillary force works strongly. Therefore, the compression absorption part 32 cooperates with the liquid permeability of the surface sheet 1, and raises the liquid absorption capability in 6 A of leak-proof grooves, and further reduces a liquid residue. Moreover, the compression absorption part 32 is connected with the crimping | compression-bonding absorption part 31 in the adjacent compaction part 7. FIG. The capillary force of the compressed fibers of the connected compression absorbing portion 32 and the pressure absorbing portion 31 increases the liquid diffusibility in the longitudinal direction along the leak-proof groove 6A and the liquid drawing property in the thickness direction, thereby preventing liquid side leakage. Increase sex. At this time, the compression absorption part 32 and the pressure-bonding absorption part 31 may have the same fiber density or may be different. From the viewpoint of liquid diffusion, it is preferable that the fiber densities of the two are different because the difference in capillary force acts as a driving force for liquid diffusion.

  The sub-recessed portion 9 is formed in accordance with the widths of both end portions 71 and 71 before and after the compacted portion 7 that generates the tension described above. In the present embodiment, the sub-recessed portion 9 is formed with a predetermined width between the vertices G1 and vertices G2 of both ends 71 and 71 of the circular compacted portion 7. Therefore, the sub-recessed portion 9 has a width S1 that is narrower than the diameter R of the circular compacted portion 7 in the plan view of the topsheet 1. A sufficient depression is not formed on both sides of the sub depression 9 because the action of tension is weak. As a result, the leak-proof groove 6 has a constricted portion 65 of the groove at the sub-recessed portion 9 in a plan view of the topsheet 1 (see FIG. 4A).

Each consolidated portion 7 has portions with different widths in the extending direction of the rows 8 in a plan view of the topsheet 1. In the present embodiment, with respect to the circular compacted portion 7 having the contour of a closed curve, the width becomes narrower toward both end portions 71 and 71 with respect to the width (diameter) R of the central portion 73. Thereby, as mentioned above, it has the constriction part 65 of 6 A of leak-proof grooves in the part of the sub-indentation part 9. As shown in FIG. The leak-proof groove 6A has a plurality of constricted portions 65 in the extending direction of the row 8, and the inner groove edge 61 on the inner side in the width direction of the napkin 10 (liquid receiving region side) and the outer side in the width direction of the napkin 10 (outer edge side). The outer groove edge 62 has a wave shape.
In addition, the site | part from which said width differs is not limited to the front-and-rear both ends 71 and 71, You may exist in the other position of the compaction part 7. FIG. At that position, the width of the consolidated portion 7 becomes narrower and another constricted portion is formed. However, from the viewpoint of imparting flexibility in the rigid leak-proof groove 6A, it is preferable that there is a constricted portion at least at the position of the sub-recessed portion 9.

  Since the leak-proof groove 6A has a wave shape by the constricted portion 65, the protruding portion of the surface sheet 1 by the linear leak-proof groove 99 as shown in FIG. 6C at the edge of the extension line of the leak-proof groove 6A. Is prevented from being continuously crushed. As a result, a region in which the protruding portion of the topsheet 1 remains in the periphery or edge of the leakage preventing groove 6A is created. For example, in the surface sheet 1A, the first projecting portion 21 and the second projecting portion 22 continue discontinuously along the wave of the leakage preventing groove 6A (see FIG. 6A). In the surface sheet 1B, the streak-like third projecting portion 25 and the fourth projecting portion 26 are stopped by the partial squeezing by the wave of the leakage preventing groove 6A (see FIG. 6B). Thereby, the bulkiness by the double-sided uneven surface of the surface sheet 1 relaxes the hardness around the leak-proof groove 6 </ b> A, softens the outer edge portion of the napkin 10, and provides a good wearing feeling. 6A to 6C, the shaded portion indicates a portion where the protruding portion is crushed.

  In addition, the pocket portion 12 of the topsheet 1 surrounded by the constricted portion 65 is located on the inner side in the width direction (the liquid receiving region C1 side) of the inner groove edge 61 forming the constricted portion 65 (see FIG. 4A). The surface sheet 1 of the pocket portion 12 is provided in the vicinity of the leak-proof groove 6A and has a concavo-convex surface 11 and a hollow portion on both sides without an embossed portion because the action of tension is weaker than that of the sub-recessed portion 9. A bulky structure exists (see FIG. 5C). Naturally, this is bulkier than the elongated portion 17 of the top sheet 1 in the sub-recessed portion 9. Therefore, the liquid permeability described above of the topsheet 1 is exhibited while being at a position near the outer peripheral edge of the napkin 10 in the width direction. This liquid permeability suppresses the amount of diffusion liquid and helps the liquid blocking function by the leakage preventing groove 6A. Moreover, the capillary force mentioned above acts strongly as a part of the leak-proof groove 6A in the sub-recessed portion 9. The sub-indentation 9 surrounds the pocket 12 so that the liquid is drawn in by the leak-proof groove itself and acts in the direction of encouraging liquid permeation through the topsheet while enclosing and temporarily holding the liquid in the pocket 12. The pocket portion 12 is effective for suppressing the lateral leakage of the liquid due to the interaction between the top sheet 1 and the above-described sub-dent portion 9. Further, since the hollow portion of the topsheet 1 exists in the pocket portion 12, the texture of the leakage preventing groove 6A and its surroundings is good in combination with the softness of the sub-recessed portion 9, and liquid return from the absorbent body hardly occurs. Moreover, in this pocket part 12, since the moderate distance to 6 A of leak-proof grooves can be maintained, the liquid which fell from the protrusion part becomes difficult to exceed 6 A of leak-proof grooves, and it is effective also in the side leakage suppression of a liquid also in this point. Moreover, since the scattered compaction portions 7 make the topsheet 1 and the absorbent body 3 firmly and integrally compacted, the above-described action tends to be sustained for a long time even during swelling after liquid absorption.

In addition, since the wave-shaped leak-proof grooves 6A and 6A are arranged symmetrically, the inner groove edges 61 of the constricted portion 65 are arranged to face each other as shown in FIG. Thereby, the distance W1 between the inner groove edges 61 and 61 of the constriction parts 65 and 65 spreads rather than between normal linear leak-proof groove, and the tension | tensile_strength with respect to the surface sheet 1 in the meantime is reduced. As a result, in the region in the width direction extending from the periphery of the constricted portions 65, 65 to the liquid receiving region C1, the hollow portion of the topsheet 1 is prevented from being crushed and the internal space tends to remain. And the bulkiness by both surface unevenness | corrugation of the surface sheet 1 is maintained, and the high cushioning property mentioned above, the soft touch by it, and the outstanding liquid permeability and air permeability are expressed. In addition, as described above, each of the leakage preventing grooves 6A and 6A as a whole has one large gentle arch shape curved outward in the width direction, which acts in the direction of weakening the tension, Contributes to action.
Further, as shown in FIG. 4A, the compacted portions 7 and 7 are also arranged to face each other. The distance W2 between the consolidated portions 7 and 7 is closer than the distance W1 between the constricted portions 65 and 65, and the tension F2 with respect to the topsheet 1 is relatively strong (see FIG. 5A). Thereby, between the compaction parts 7 and 7, the liquid drawing force of the thickness direction in 6 A of leak-proof grooves acts strongly.
Thus, between the pair of corrugated leak-proof grooves 6A, 6A, a portion where the tension in the width direction with respect to the top sheet 1 works strongly and a portion where the tension in the width direction works weakly are arranged in the longitudinal direction of the napkin 10. Have alternating along. Thereby, the cushioning property and liquid permeability due to the bulkiness of the topsheet 1 and the liquid blocking function by the leakage preventing groove 6A act in a well-balanced manner.

  Moreover, the same effect | action arises also in the outer edge side (outer edge side of the napkin 10) of the leak-proof groove 6A, further reduces the hardness felt in the crotch, and gives a good dry feeling without liquid residue. On the outer side in the width direction of the outer groove edge 62 of the constricted portion 65, a bulky structure of the uneven surface of the topsheet 1 is present, resulting in cushioning and soft touch, and good dry feeling is obtained with high liquid permeability. Further, at the outer side in the width direction of the outer groove edge 62 of the compacted portion 7, the distance from the outer peripheral seal portion 9 is shorter than the constricted portion 65, and the liquid blocking function is activated by the tension of the leakage preventing groove 6A. Thereby, the cushioning property and liquid permeability by the bulkiness of the surface sheet 1 and the liquid blocking function by the leakage preventing groove 6A function in a more balanced manner throughout the napkin 10.

  Furthermore, the wave-shaped leak-proof groove 6A includes a circular compacted portion 7 having a closed curved contour and a sub-recessed portion 9 that is recessed by tension therebetween, and does not include a straight portion. That is, it has a curved shape without a bent portion. As a result, the liquid puddle is hardly generated at the bent corner, and the dry feeling is excellent. Further, the external force at the time of wearing does not have an angular deformation at the bent portion, and becomes a soft flexible deformation, so that a soft touch is maintained. Moreover, it becomes easy to fit skin.

The shape of the compacted portion 7 in the leak-proof groove 6A is not limited to the above-described circular shape in the plan view of the topsheet 1, and a shape having portions having different widths in the extending direction of the row can be arbitrarily adopted. With this shape, the leakage preventing groove 6A has a wave shape including a plurality of sub-recessed portions 9 with the constricted portions 65 as described above.
Further, in order to obtain the sub-recessed portion 9 with the constricted portion 65, the compacted portion 7 has at least the widths of the front and rear end portions in the extending direction of the row being narrower than the width of the central portion in the extending direction of the row. It is preferable. That is, it is preferable that the consolidated part 7 has a shape in which the front and rear ends of the planar shape are tapered.
Furthermore, it is more preferable that the compacted portion 7 has a closed curved outline having no corners in the plan view of the topsheet 1. As a result, the constricted portion 65 (the edge of the sub-recessed portion 9) and the consolidated portion 7 are connected by a gentle curve, and the above-described soft deformation and soft touch that are not angular are more likely to be expressed, which is preferable.

  From the above viewpoint, other preferable shapes of the compacted portion 7 include those shown in FIGS. 7A to 7C, for example. FIG. 7A shows a pentagonal shape in which both end portions 71 and 71 are narrower than the width of the central portion 73. FIG. 7B is a rhombus, and the apexes are arranged at both end portions 71 and 71, and are naturally narrower than the width of the central portion 73. FIG. 7C is elliptical with the major axis oriented in the extending direction of the row 8, and the widths of both end portions 71, 71 are narrower than the width of the central portion 73.

  In the leakage preventing groove 6A of the present embodiment, the distance (separation length) T between the consolidated portions 7 and 7 in the extending direction of the row 8 is the uneven pitch N in the longitudinal direction of the topsheet 1 as shown in FIG. Shorter than that. Thereby, the combination of the sub hollow part 9 and the constriction part 65 is arrange | positioned finely, and since the bulky structure of the surface sheet 1 in the periphery can be hold | maintained along the leak-proof groove 6, it is preferable. Here, the uneven pitch N in the longitudinal direction of the topsheet 1 is the length between the projecting portions in the longitudinal direction when the projecting portion and the recessed portion are a set of repeating units on the skin contact surface side of the topsheet 1. Means.

  The ratio (T / N) of the distance (separation length) T between the consolidated portions 7 and 7 to the unevenness pitch N in the longitudinal direction of the topsheet 1 is preferably less than 1, more preferably 0.7 or less, and 5 or less is more preferable. The ratio (T / N) is preferably 0 or more, more preferably 0.05 or more, and still more preferably 0.1 or more, from the viewpoint of maintaining the hollow structure in the pocket portion. More specifically, the ratio (T / N) of the distance (separation length) T between the consolidated portions 7 and 7 is preferably 0 or more and less than 1, more preferably 0.05 or more and 0.7 or less. More preferably, it is 1 or more and 0.5 or less.

In addition, the separation distance T between the consolidated portions 7 and 7 is preferably 8 mm or less, more preferably 4 mm or less, and even more preferably 2 mm or less, from the viewpoint of forming the sub-recessed portion 9 by tension. In addition, the separation length T between the consolidated portions 7 and 7 is preferably 0 mm or more, more preferably 0.5 mm or more, and more preferably 1 mm or more, from the viewpoint of imparting flexibility to the leakage preventing groove 6A by the sub-dent 9. Further preferred. Specifically, the separation length T between the consolidated portions 7 and 7 is preferably 0 mm or more and 8 mm or less, more preferably 0.5 mm or more and 4 mm or less, and further preferably 1 mm or more and 2 mm or less.
Further, the widthwise length (S1) of the widest portion of the consolidated portion 7 is preferably 0.5 mm or more, more preferably 1 mm or more, and more preferably 1.5 mm or more from the viewpoint of increasing the wave shape due to the constriction. Further preferred. Further, from the viewpoint of the flexibility of the leakage preventing groove, it is preferably 6 mm or less, more preferably 5 mm or less, and still more preferably 4 mm or less.
In addition, the length (S2) in the extending direction of the rows 8 of the consolidated portions 7 is preferably 0.5 mm or more, more preferably 1 mm or more, and still more preferably 2 mm or more, from the viewpoint of obtaining sufficient leakage prevention. Moreover, from a viewpoint of making many constriction parts exist in a leak-proof groove, 8 mm or less is preferable, 7 mm or less is more preferable, and 6 mm or less is still more preferable.

  Depending on the size and compressive strength of the compacted portion 7, the depression peripheral portion 91 may be disposed by reaching the range of the width direction indicated by the two-dot chain line in FIG. Since the tension forming the depression peripheral portion 91 is a force in one direction, it is weaker than the force applied to the sub depression portion 9. Therefore, the hollow peripheral part 91 becomes weaker than the sub hollow part 9 (thickness H4> H3, FIG. 5 (A), (B-2), and (C)). When there exists this hollow peripheral part 91, here is the leak-proof groove 6A. For example, as shown in FIG. 5 (B-2), the thickness H1 outside the leak-proof groove 6 such as the liquid receiving region C1 is gradually increased to the thickness H4 of the recess peripheral portion 91 and the thickness H2 of the consolidation portion 7. It is a recessed groove. Thereby, the groove width in the consolidated part 7 becomes larger than the groove width of the sub-recessed part 9, and the constricted part 65 becomes clearer. Further, the degree of elongation of the topsheet 1 and the density of the absorber 3 have a gradient that is gradually increased from the liquid receiving region C1 toward the depression peripheral portion 91 and the compacted portion 7 in the width direction. With respect to the top sheet 1, the number of uneven surfaces is gradually reduced to increase the remaining rate, and with respect to the absorber 3, the density is gradually increased to have a capillary force gradient. This combination is effective in improving the drawability of the liquid.

  As described above, the leak-proof groove 6 may be formed by partially contacting the front and rear ends of the compacted portion 7 in addition to the compacted portions 7 being separated from each other. FIGS. 9A and 9B show preferred embodiments thereof. 10A to 10C show specific examples of other preferable shapes of the consolidated portion 7 in FIG.

FIGS. 9A and 9B show leakage prevention grooves 6B arranged in a row 8 in a state where the circular compaction portions 7 are partially in contact with each other. The part that is in contact with each other is referred to as a consolidation connecting portion 75. Similarly to the leakage preventing groove 6A shown in FIG. 4, the leakage preventing groove 6B is paired on both sides of the liquid receiving region C1, and the shape is arranged symmetrically about the widthwise center line extending in the longitudinal direction.
The shape of the compacted portion 7 in the leak-proof groove 6B is not limited to a circular shape, and a shape having portions having different widths from each other and the sub-recessed portion 9 and the constricted portion 65 are disposed can be arbitrarily adopted. For example, a pentagonal compaction part 7 shown in FIG. 10A, a rhombus compaction part 7 shown in FIG. 10B, an elliptical compaction part 7 shown in FIG. In any shape, a row 8 is formed in a state where the end portion 71 of the compacted portion 7 and the end portion 71 of the other compacted portion 7 facing each other are in contact with each other to form a leak-proof groove 6B.

In the leak-proof groove 6B, a portion of the compacted portion 7 that is recessed in an integrated compacted state of the topsheet 1 and the absorber 3 is continuous in the extending direction of the row 8 (see FIG. 11A). . More specifically, the crimping part 16 and the crimping absorption part 31 of the top sheet 1 of the compaction part 7 are continuous in the extending direction of the rows 8 via the compaction connection part 75. This portion becomes a liquid diffusion path in the longitudinal direction along the leakage preventing groove 6B where the compaction portion 7 continues, and the capillary force acts more strongly than in the case of the leakage preventing groove 6A, thereby further preventing the lateral leakage of the liquid. Make it high.
In addition, in the adjacent portions on both sides of the consolidation connection portion 75, the sub-recess portions 9 in which the tension of the front and rear consolidation portions 7 is exerted strongly are arranged. As described above, the sub-recessed portion 9 has the extended portion 17 of the bulky surface sheet 1 with the uneven surface remaining and the compression absorbing portion 32, and connects the consolidated portions 7 in the extending direction of the rows 8. This portion is another liquid diffusion path in the longitudinal direction in which the compacted portion 7 is connected (connected) by the sub-recessed portion 9 (see FIG. 11B). This liquid diffusion path is a liquid diffusion path due to a difference in capillary force or the like, as described in the leakage preventing groove 6A.
Further, in the sub-recessed portion 9, the elongated portion 17 of the topsheet 1 can quickly take in the transition liquid from the liquid receiving region C1 due to the liquid capturing property and liquid permeability due to the uneven surface. The sub-recessed portion 9 can efficiently distribute the liquid to two systems of a liquid diffusion path in which the compaction part 7 continues and a liquid diffusion path in which the compaction part 7 is connected by the sub-recessed part 9.
Further, the consolidation connecting portion 75 and the sub-recessed portion 9 are arranged in the width direction (see FIG. 11C). Furthermore, depending on the magnitude of the tension of the squeezed portion 7, the above-described dent peripheral portion 91 may be disposed outside the sub-dent portion 9. The sub-recessed portion 9 and the recessed peripheral portion 91 are provided on both sides of the consolidation connecting portion 75 with a bulkiness on the uneven surface of the surface sheet, and give further softness to the leak-proof groove 6B. Moreover, since the width of the consolidation connecting portion 75 is narrower than the width of the central portion 73 of the consolidation portion 7, the rigidity is further relaxed at this portion by this combination.

  The leak-proof groove 6 </ b> B has a constricted portion 65 of the groove at the portion of the consolidation connecting portion 75 and the sub-recessed portion 9 in the plan view of the topsheet 1. Thereby, the continuous crushing of the protrusion part of the surface sheet 1 is avoided similarly to the leak-proof groove 6A. In addition, there is a bulky structure of the double-sided uneven surface having a hollow portion of the topsheet 1 in the pocket portion 12 at the position of the constricted portion 65. This pocket part 12 expresses the enclosure of the liquid by interaction with the bulky surface sheet 1 and the corrugated leak-proof groove 6B, and is effective in suppressing the lateral leakage of the liquid. Moreover, the bulky structure of the surface sheet 1 in this portion, together with the flexibility of the sub-dent 9, relaxes the rigidity of the leak-proof groove 6 </ b> B and gives softness when touching the skin, resulting in a good wearing feeling.

  Further, the wave shape of the leak-proof groove 6B is symmetric with respect to the width direction center line L extending in the longitudinal direction. Thereby, between the leak-proof grooves 6B and 6B, as in the case of the leak-proof groove 6A, along the longitudinal direction of the napkin 10, a portion where a strong tension is applied to the surface sheet, and a portion where a weak tension is applied Alternately (not shown). Furthermore, the strength of the tension becomes a repetitive pattern similar to that on the inside also on the outside of each of the leakage preventing grooves 6B and 6B. Thereby, the cushioning property and liquid permeability due to the bulkiness of the topsheet 1 and the liquid blocking function act in a well-balanced manner by the leakage preventing groove 6B. In addition, as described above, each of the leakage prevention grooves 6B and 6B has one large gentle arch shape curved outward in the width direction as a whole. Contributes to action.

Moreover, it is preferable that the napkin 10 arranges a plurality of the above-described pair of left and right leakage prevention grooves 6 in parallel on both sides. For example, as shown in FIG. 12 (A), in the excretory part corresponding region C, the leak-proof grooves 6P and 6P that make a pair with the liquid-receiving region C1 interposed therebetween, and the leak-proof grooves 6S and 6S that make a pair on the outside of the pair. The form which has arrange | positioned is mentioned. The leak-proof grooves 6P and 6S have the sub-recessed portion 9 and the constricted portion 65, and may be in any form as long as they are symmetric pairs. For example, as shown in FIGS. And leakage prevention grooves 6A and 6B. As a result, it is possible to further improve the prevention of leakage and the soft touch with the double leak-proof grooves 6P and 6S having liquid absorbency and flexibility.
In addition, as shown in FIG. 12B, the leakage prevention grooves 6P and the leakage prevention grooves 6S adjacent to each other on both side portions of the napkin 10 are arranged at a pitch in which the compaction portions 7 are shifted in the longitudinal direction. Preferably it is. Thereby, the compaction parts 7 are not adjacent to each other, and it is avoided that the top sheet 1 and the absorber 3 are pulled with each other's tension. As a result, a pocket portion 12S having a bulky structure with double-sided uneven surfaces having a hollow portion of the topsheet 1 can be formed in a narrow region between the leak-proof groove 6P and the leak-proof groove 6S. This pocket portion 12S is also preferable because quick liquid permeation acts and functions as a further breakwater for liquid leakage. Moreover, the part which touches the crotch by the pocket part 12S between the leak-proof groove 6P and the leak-proof groove 6S is preferable because the touch is further soft.

The napkin 10 preferably has a plurality of pairs of the left and right leakage prevention grooves 6 described above. And it is preferable that the part where the space | interval area | region between a pair of right-and-left leakage prevention grooves adjacent in the width direction is the widest exists in the liquid receiving area | region C1 of the excretion part corresponding | compatible area C.
As a specific example of the plurality of pairs, the mode shown in FIG. In FIG. 13, a pair of leakage prevention grooves 6Q and 6Q and a pair of leakage prevention grooves 6R and 6R are arranged on the front part F and the rear part R of the pair of leakage prevention grooves 6P and 6P, respectively. Furthermore, a pair of leakage preventing grooves 6S, 6S is arranged at positions spaced apart on the left and right outer edges of the leakage preventing grooves 6P, 6P.
The leak-proof groove 6P is one large gentle arch shape that is curved so as to surround the outer edge in the width direction of the liquid receiving region C1 of the excretory part corresponding region C. Leak preventive groove 6Q has a shorter length than leak preventive groove 6P and draws one arc curved outward, and is connected to the other leak preventive groove 6Q on the front end side of napkin 10 to form an arc. It has become. Similarly, the leak-proof groove 6R has a shorter length than the leak-proof groove 6P and draws one arc curved outward and connected to the other leak-proof groove 6R to form an arc. Leakproof groove 6S draws an arc that is curved outward by connecting waves so as to surround the outer edge side of leakproof groove 6P with a shorter length than leakproof groove 6P. Each leak-proof groove is symmetrical with each other in pairs.
Moreover, between the leak-proof groove 6P and the leak-proof groove 6S is a non-squeezed region on both sides of the napkin 10. Further, the leak-proof groove 6P and the leak-proof groove 6S are symmetric in the left and right sides of the napkin 10, respectively. For this reason, a plurality of pocket portions 12 </ b> S with mutual waves drawn are arranged between the leakage preventing grooves 6 </ b> P and 6 </ b> S.
Furthermore, the leak-proof groove 6Q and the leak-proof groove 6R are connected to the front and rear ends of the leak-proof groove 6P, and there are connecting portions 69 at the front and rear, right and left four places. Since each connecting portion 69 is formed at a portion where the arch of each leakage prevention groove enters inward, the connecting portion 69 has a concave shape toward the inward side.

  In such a configuration having a plurality of pairs of leak-proof grooves, the area of tension relaxation due to the wave shape increases, and the bulky structure of the topsheet 1 is maintained in a wide range. In addition, pressure absorption and relaxation by the leak-proof groove 6 can be further enhanced with respect to the external force in the width direction when the napkin 10 is mounted. Thereby, the twist of the member structure of the liquid-receiving area C1 is suppressed, and the bulky structure of the double-sided concavo-convex surface provided with the hollow portion of the topsheet is preferably maintained even when the napkin 10 is used. In addition, the liquid absorbability at the outer peripheral edge of the napkin 10 is further improved. As a result, even when there are various situations when the napkin 10 is worn (for example, situations such as momentary changes in posture during walking or work, continuation of sitting posture for a long time, etc.) It is preferable because it can prevent and achieve absorption well.

  For example, in the case of the embodiment of FIG. 13, as shown in FIGS. 14A and 14B, when the external force F9 from the crotch is applied, the leakage preventing groove 6P receives the external force F9. At that time, the leak-proof groove 6P is connected to the front and rear leak-proof grooves 6Q and 6R by the connecting portion 69 to form a breakwater extending in the longitudinal direction of the napkin. For this reason, the external pressure F9 applied to the leakage preventing groove 6P is weakened inwardly in the liquid receiving region C1 with the rigidity of the front and rear leakage preventing grooves 6Q and 6R. Further, since the connecting portion 69 has a shape that is recessed inward, the external force F9 is difficult to be connected to the front and rear leakage prevention grooves 6Q and 6R and the deformation of the surroundings. Accordingly, the twist in the liquid receiving region C1 and the accompanying bulky structure of the topsheet 1 can be easily maintained even at the time of wearing, and appropriate liquid absorption is realized, which is preferable. Moreover, although not shown in figure, since the leak-proof groove 6S becomes a 1st breakwater with respect to an external pressure, the spreading of the external force to the inner side of the liquid receiving area | region C1 can be further prevented and it is preferable. On the other hand, when it consists of a pair of leak-proof grooves as shown in FIGS. 14C and 14D, the spread of the external force F9 is stronger in the liquid receiving region C1 than in the above case depending on the strength of the force. May work. For this reason, it is more preferable to have a plurality of pairs of leak-proof grooves from the viewpoint of maintaining performance during use.

  The method for forming the leak-proof groove 6 as described above can be performed by adopting a normal method used for this type of article. For example, the method of heat-sealing using the press roll (not shown) which the surface is uneven | corrugated and has a press part is mentioned. The shape of the pressing portion (height, width, uneven shape, etc.) can be appropriately set from the viewpoint of pressing strength and the like. Moreover, pressing strength and pressing depth can be adjusted by appropriately setting processing conditions such as pressing pressure, heating temperature (heat sealing temperature), and pressing time.

In the napkin 10, the bulky structure of the surface sheet 1 described above can employ various shaping methods for the nonwoven fabric as appropriate.
For example, in the case of the topsheet 1A shown in FIG. 2, in the air-through method, a fiber web is placed on a shaped support having an uneven surface, and the temperature and speed of the hot air to be blown are controlled to perform shaping treatment and heat. It can be manufactured by applying a fusion treatment. For example, the method described in paragraph [0031] of JP2012-136790A or the methods described in paragraphs [0033] to [0061] of JP2012-149371A can be used. Examples of the shaped support used in this case include the support shown in FIG. 1 of JP 2012-149370 A, the support shown in FIGS. 1, 3 and 4 of JP 2012-149371 A, and the like. .
Further, in the case of the surface sheet 1B shown in FIG. 3, the intersections of the constituent fibers of the fiber web are heat-sealed to form a nonwoven fabric, and then carried between a pair of concave and convex (tooth gap) rolls that mesh with each other and stretched in one direction. Can be obtained.

  As the material for forming the top sheet 1, the back sheet 2, the absorber 3 and the side sheet 4 constituting the napkin 10, those used for this type of article can be used without particular limitation.

  For example, the top sheet 1 is made of a non-woven fabric, and as a forming material thereof, for example, a thermoplastic resin fiber subjected to a hydrophilic treatment, a fiber material described in paragraph [0032] of Japanese Patent Application Laid-Open No. 2012-136791 can be used. . Further, a liquid permeable sheet such as an apertured film may be combined with the nonwoven fabric. Regarding the forming material, a material obtained by hydrophilization treatment with a three-dimensional crimped fiber such as a secondary crimp or a tertiary crimp may be used. Specifically, polyethylene, polypropylene, polyester, nylon, and composite fibers thereof are prepared, and various hydrophilizing agents are applied at a stage before cutting into a predetermined length to form staples. Hydrophilic agents include various alkyl sulfonates represented by α-olefin sulfonates, acrylates, acrylate / acrylamide copolymers, ester amides, ester amide salts, polyethylene glycol and derivatives thereof, water-soluble Hydrophilic treatment with various commonly used hydrophilizing agents such as a basic polyester resin, various silicone derivatives, various saccharide derivatives, and mixtures thereof can be used.

As the back sheet 2, a moisture-impermeable or moisture-permeable film alone, a laminate of a film and a nonwoven fabric, or a water-repellent nonwoven fabric (such as SMS or SMMS) can be used. From the standpoint of cost and matching with an anti-displacement adhesive, it is most preferable to use a moisture permeable film alone as a leakproof material. In this case, as the moisture permeable film material, a film obtained by melt-kneading a thermoplastic resin and an inorganic filler not compatible with the thermoplastic resin and extruding the film to a predetermined dimension, or essentially, In addition, a non-porous film having high water compatibility and capable of discharging water vapor, such as a permeable membrane, can be used. In order to realize a leak-proof layer that fully expresses the performance of moisture discharge according to the present invention and does not exude moisture, the moisture permeability is 0.7 g / 100 cm ² hr or more and 3.0 g / 100 cm ² hr or less. Preferably, it is in the range of 1.0 g / 100 cm ² hr or more and 2.5 g / 100 cm ² hr or less. From the viewpoint of sufficiently improving the smoothness, it is most preferable that the amount is 1.5 g / 100 cm ² hr or more and 2.5 g / 100 cm ² hr or less. Further, since the film can be used without troubles such as breakage of the film basis weight 18 g / ^{m 2} or more 70 g / ^{m 2} or less, more preferably 25 g / ^{m 2} or more 60 g / ^{m 2} or less. Moreover, a preferable inorganic filler compounding quantity is 30 to 65 mass% as a mass% of the filler with respect to the mass of the whole film, More preferably, it is 40 to 60 mass%.

  Although there is no restriction | limiting in particular as a constituent material of the absorber 3, It is using the thing etc. which pinched | interposed the fiber material, the mixed fiber body of the fiber material and the porous body, etc. with the core wrap sheet (paper, a nonwoven fabric, etc.). it can. Examples of the fiber material include natural fibers such as wood pulp, cotton and hemp, polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, and single fibers made of synthetic resins such as polyvinyl alcohol resin, and these resins. Bisynthetic fibers containing two or more of them, and semisynthetic fibers such as acetate and rayon can be used. When using a fiber made of a synthetic fiber, the fiber may be a heat-shrinkable fiber whose shape changes due to heat. For example, the fineness is increased by heat but the fiber length is shortened, and the fineness is hardly changed by heat, but the length occupied by the apparent fiber is shortened by changing the shape to a coil shape. Also good. As the porous body, sponge, non-woven fabric, aggregate of superabsorbent polymer (aggregate of superabsorbent polymer and fiber) and the like can be used.

  The side sheet 4 is preferably a water-repellent non-woven fabric and is made of a water-repellent material such as a non-woven fabric, spunbonded non-woven fabric, meltblown non-woven fabric, spunlace non-woven fabric, heat roll non-woven fabric, needle punched non-woven fabric manufactured by the card method. Various non-woven fabrics treated with water can be used. Particularly preferably, for example, a spunbond nonwoven fabric, a spunbond-meltblown (SM) nonwoven fabric, a spunbond-meltblown-spunbond (SMS) nonwoven fabric, or the like is used.

  The absorbent article of the present invention is not limited to the sanitary napkin of the above embodiment, and can be applied to, for example, incontinence pads, incontinence liners, urine collection pads, disposable diapers, and the like. Moreover, it is effective not only for menstrual blood but also urine, orimono, loose stool, and the like. In addition to the above-described constituent members, members may be incorporated as appropriate according to the application and function.

  This invention discloses the following absorbent articles further regarding embodiment mentioned above.

<1>
It has a top sheet on the skin contact surface side, a back sheet on the non-skin contact surface side, and an absorber positioned between the top sheet and the back sheet. An absorbent article having a longitudinal direction across the back side and a width direction orthogonal to the longitudinal direction,
The surface sheet has an uneven surface and a hollow portion without embossed portions on the skin side surface and the absorber side surface, and a leak-proof groove recessed from the surface sheet to the absorber is at least on the surface sheet. A pair of left and right
The leak-proof groove has a row in which a plurality of compacted portions in which the topsheet and the absorbent body are recessed in an integrated compaction state are arranged in the longitudinal direction, and the unevenness of the topsheet is provided between the compacted portions of the rows. And at least a part of the surface, and the thickness of the absorber between the consolidated portions of the row is a sub-recessed portion that is thinner than the thickness of the absorber outside the leak-proof groove, Are connected at the sub-recesses,
The consolidated portion has a portion having different widths in the extending direction of the row in the plan view of the top sheet,
The pair of left and right leak-proof grooves is an absorbent article whose shape is bilaterally symmetric about a widthwise center line extending in the longitudinal direction in a plan view of the topsheet.

<2>
The consolidated portion has an absorptivity according to <1>, in which the width of both end portions in the extending direction of the row is narrower than the width of the central portion in the extending direction of the row in the plan view of the top sheet. Goods.
<3>
The said compaction part is an absorbent article as described in said <1> or <2> which has the outline of a closed curve in the planar view of the said surface sheet.
<4>
The absorbent article according to <3>, wherein a shape of the compacted portion is a circle, an ellipse, a rhombus, or a pentagon.
<5>
The absorbent article according to any one of <1> to <4>, wherein a distance between the consolidated portions in the extending direction of the row is shorter than a concave-convex pitch in a longitudinal direction of the topsheet.
<6>
T / N, which is a ratio of the distance T between the consolidated portions to the uneven pitch N, is 0 or more and less than 1, preferably 0.05 or more and 0.7 or less, and particularly preferably 0.1 or more and 0.5 or less. The absorbent article as described in said <5>.
<7>
The absorbent article according to any one of <1> to <5>, wherein a distance between the consolidated portions is 0 mm or more and 8 mm or less, preferably 0.5 mm or more and 4 mm or less, and particularly preferably 1 mm or more and 2 mm or less.
<8>
The absorbent article according to any one of <1> to <7>, wherein the consolidated portions arranged in the extending direction of the row are arranged in a state in which the front and rear end portions are partially in contact with each other.
<9>
A plurality of the leak-proof grooves are arranged in parallel on both side portions of the absorbent article, and the leak-proof grooves adjacent to each other on the both side portions have a pitch at which the compaction portions are shifted in the longitudinal direction. The absorbent article according to any one of <1> to <8>, which is arranged.
<10>
Any of the above <1> to <9>, wherein a plurality of the pair of left and right leakage prevention grooves are arranged, and a portion where the separation area between the leakage prevention grooves adjacent in the width direction is the widest is in the liquid receiving area 2. The absorbent article according to 1.
<11>
The absorbent article according to any one of <1> to <10>, wherein the uneven surface of the surface sheet does not have a bent portion, and is configured as a continuous curved surface as a whole.
<12>
The top sheet has first protrusions protruding to the skin side and second protrusions protruding to the absorber side, and a plurality of the surface sheets are alternately arranged in different directions intersecting in plan view. The absorbent article according to any one of <11>.
<13>
In the topsheet, the absorbent article according to <12>, wherein the alternating arrangement of the first protrusions and the second protrusions is a staggered arrangement with a half-pitch shift between adjacent arrays.
<14>
The absorbent article <15> according to <12> or <13>, wherein the first protrusion and the second protrusion are conical.
The absorbent article according to <12> or <13>, wherein the first protrusion and the second protrusion have a truncated cone shape or a hemispherical shape with a rounded top.
<16>
The absorbent article according to any one of <1> to <12>, wherein the surface sheet has a corrugated shape in which streaky irregularities are alternately arranged in the width direction.
<17>
The absorbent article according to any one of <1> to <16>, wherein the left and right pair of leakage preventing grooves are plural.
<18>
In the excretion part corresponding region of the absorbent article that faces the excretion part of the wearer, the leakage prevention groove that forms a pair with the liquid receiving region interposed therebetween, and the leakage prevention groove that forms a pair on the outside thereof are arranged <17>.
<19>
The absorbent article according to any one of <1> to <18>, wherein in the pair of leakage preventing grooves, the compacted portions of each other are arranged at a pitch shifted in a longitudinal direction.
<20>
Each of the leak-proof grooves has one large gentle arch shape whose overall shape is curved outward in the width direction of the absorbent article, according to any one of <1> to <19>. Absorbent articles.
<21>
The absorbent article according to any one of <1> to <20>, wherein a portion having the widest separation area between the leak-proof grooves adjacent in the width direction is in the liquid receiving area of the excretory part corresponding area.
<22>
The absorbent article according to any one of <1> to <21>, wherein the absorbent article is a sanitary napkin.

  Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited thereto.

Example 1
First, the nonwoven fabric shown in FIG. 2 was produced and cut into a size for a surface sheet. Specifically, a sheet produced by the method described in JP2013-133574A was used. The surface sheet has a basis weight of 12 g / m ^{2 at} 2.4 dtex in which the core is made of polyethylene terephthalate and the sheath is made of polyethylene in the upper layer, and 2.9 dtex fiber in which the core is made of polyethylene terephthalate and the sheath is made of polyethylene in the lower layer is 18 g / m ² . The total thickness of the topsheet was adjusted to 2.2 mm, adjusted to a total weight of 30 g / m ² so as to have a basis weight. Moreover, the space | interval of the top sheet | seat of the skin side protrusion part which adjoins the surface sheet was 5 mm, and the space | interval of the top part of the skin side protrusion part adjacent to a longitudinal direction was 8 mm.
The obtained surface sheet, absorbent body (the one having a basis weight of 280 gsm, which is coated with 0.1 g of superabsorbent polymer and wrapped in tissue paper), the back sheet (the basis weight of 23 gsm polyethylene film) and the side sheet (basis weight) 20 gsm spunbond nonwoven fabric) was laminated and fixed. Next, a pair of symmetrical leak-proof grooves shown in FIG. 4 was formed. Each consolidated part 7 was circular and the diameter was 2.5 mm. The separation distance T between the consolidated parts at this time was 1.0 mm. As shown in the photograph of FIG. 15D, in the pocket portion 12 at the edge of the leakage preventing groove 6A (sub-recessed portion 9), the hollow portion 21K of the topsheet 1 remains firmly and there is a bulky structure with unevenness on both sides. It was.

(Comparative Example 1)
A sample of Comparative Example 1 was produced in the same manner as in Example 1 except that the leakage preventing groove was a continuous straight line having a width of 2 mm. As can be seen from FIG. 15 (E), the surface sheet at the edge of the leak-proof groove had a hollow portion and a concavo-convex shape crushed more than those in Example 1.

(Comparative Example 2)
A sample of Comparative Example 2 was produced in the same manner as in Example 1 except that the separation distance T between the consolidated portions of Example 1 was 4.5 mm.

(Test method)
1. Liquid residue test of surface sheet around leakproof groove 2.0 g of defibrinated horse blood was poured into a sanitary napkin for each evaluation in a 35 mm range along the leakproof groove in a non-pressurized state. 60 seconds after pouring defibrinated horse blood, L value in a range of 8 mm in diameter centering on the position of defibrated horse blood was measured. For the measurement, a simple spectral color difference meter NF333 manufactured by Nippon Denshoku Industries Co., Ltd. was used.
The larger the value of L value (brightness) is, the closer the color is to white, and the less redness is visible on the top sheet. That is, the larger the L value, the less liquid remaining on the top sheet.
The defibrinated horse blood used was adjusted to a viscosity of 8.0 ± 0.1 cP (25 ° C.). The viscosity was adjusted by adding plasma and blood cell components extracted from horse blood itself to horse blood. Plasma and blood cell components are a supernatant portion and a sediment portion, respectively, when horse blood is left and separated.

2. Leakage prevention test using leak-proof grooves The sanitary napkin for each evaluation was expanded in a flat shape, the top sheet was faced up, and fixed on a smooth inclined surface with an inclination angle of 45 ° with respect to the horizontal surface in a non-pressurized state. . The same amount of defibrinated horse blood as described above is added for 30 seconds at a rate of 1 g / 10 seconds from the leakage prevention groove on the surface sheet (leakage prevention groove adjacent to the reception area) to the 10 mm reception area side. 3 g was continuously injected. The presence or absence of seepage of the liquid to the outside of the leakage prevention groove when injected (the leakage prevention property of the liquid diffusing in the absorber) was confirmed. The state of oozing out of the liquid outside the leak-proof groove at the time of pouring was as shown in the drawing substitute photos of FIGS.

As shown in FIG. 16, in Example 1, the L value is improved by about 15% as compared with Comparative Example 1, and the liquid permeability of the surface sheet and the liquid remaining prevention property are improved in the vicinity of the leakage prevention groove. It was excellent. Further, as shown in the drawing substitute photograph of FIG. 16, Example 1 does not cause liquid side leakage as in the case of the continuous straight line of Comparative Example 1, despite the leakage prevention grooves formed by the rows of the compacted portions separated from each other. It was. As can be seen from FIG. 15, in the top sheet of Example 1, the liquid sheet is permeable to the absorbent body due to the presence of the protruding portion of the top sheet in the pocket portion 12 adjacent to the sub-dent portion between the consolidated portions. Is considered to be superior to Comparative Example 1. In particular, the protruding portion of the topsheet 1 of Example 1 has a large hollow portion and has a height, and is projected to the side of the sub-recessed portion. This can be thought to have led to the prevention of liquid leakage.
Moreover, in the comparative example 2, since the compaction part was separated too much and it was not connected by the sub-indentation part, the liquid leak had arisen.
Moreover, the surface sheet of Example 1 had a soft touch on the skin compared to that of Comparative Example 1 due to the above-described bulky structure.

DESCRIPTION OF SYMBOLS 1, 1A, 1B Surface sheet 16 Surface sheet crimping part 17 Surface sheet extending part 21 First projecting part 22 Second projecting part 25 Third projecting part 26 Fourth projecting part 2 Back sheet 3 Absorber 31 Crimp absorbing part 32 Compression absorbing portion 6, 6A, 6B Leak-proof groove 65 Constriction portion 7 Consolidation portion 75 Consolidation connection portion 8 Row (consolidation portion) Sub-recessed portion 10 Sanitary napkin 12, 12S Pocket portion

Claims (7)

It has a top sheet on the skin contact surface side, a back sheet on the non-skin contact surface side, and an absorber positioned between the top sheet and the back sheet. An absorbent article having a longitudinal direction across the back side and a width direction orthogonal to the longitudinal direction,
The surface sheet has an uneven surface and a hollow portion without embossed portions on the skin side surface and the absorber side surface, and a leak-proof groove recessed from the surface sheet to the absorber is at least on the surface sheet. A pair of left and right
The leak-proof groove has a row in which a plurality of compacted portions in which the topsheet and the absorbent body are recessed in an integrated compaction state are arranged in the longitudinal direction, and the unevenness of the topsheet is provided between the compacted portions of the rows. And at least a part of the surface, and the thickness of the absorber between the consolidated portions of the row is a sub-recessed portion that is thinner than the thickness of the absorber outside the leak-proof groove, Are connected at the sub-recesses,
The consolidated portion has a portion having different widths in the extending direction of the row in the plan view of the top sheet,
The pair of left and right leak-proof grooves is an absorbent article whose shape is bilaterally symmetric about a widthwise center line extending in the longitudinal direction in a plan view of the topsheet.   2. The absorbent article according to claim 1, wherein, in the plan view of the top sheet, the width of both end portions in the extending direction of the row is narrower than the width of the central portion in the extending direction of the row.   The absorptive article according to claim 1 or 2 in which said compaction part has the outline of a closed curve in plane view of said surface sheet.   The absorbent article according to any one of claims 1 to 3, wherein a distance between the consolidated portions in the extending direction of the row is shorter than a concave-convex pitch in a longitudinal direction of the topsheet.   The absorptive article according to any one of claims 1 to 3, wherein the compacted portions arranged in the extending direction of the row are arranged in a state in which the front and rear end portions are partially in contact with each other.   A plurality of the leak-proof grooves are arranged in parallel on both side portions of the absorbent article, and the leak-proof grooves adjacent to each other on the both side portions have a pitch at which the compaction portions are shifted in the longitudinal direction. The absorbent article according to any one of claims 1 to 5, wherein the absorbent article is arranged.   7. The liquid receiving region according to claim 1, wherein a plurality of the pair of left and right leakage preventing grooves are arranged, and a portion where the separation region between the leakage preventing grooves adjacent in the width direction is the widest is in the liquid receiving region. The absorbent article as described.