JP6235883B2 - Absorbent articles - Google Patents

Description

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

  When a sanitary napkin of a relatively long type (hereinafter referred to as a napkin) such as a sanitary napkin for night use is attached to an undergarment (shorts, etc.), as shown in FIG. In many cases, each part is worn with one hand. At that time, the hand holding the back part of the napkin is placed on the back side of the wearer, and it is difficult to visually check the back part, so the back part is bent left and right with respect to the center line of the underwear May be worn. Wearing in a state where the rear part is bent may lead to leakage from the rear part, and also causes the wearer to feel uncomfortable during wearing.

  By the way, as a surface sheet for absorbent articles such as a sanitary napkin, a surface sheet that has been embossed on the surface that comes into contact with the skin of the wearer to enhance the design is known. For example, what formed patterns, such as a petal shape, circular shape, star shape, and leaf shape, by the compression part formed by embossing is known (refer to patent documents 1 and 2).

  However, Patent Literature 1 and Patent Literature 2 describe using a compression portion formed by embossing or a protruding portion other than the compression portion as an alignment means when attaching an absorbent article to an underwear such as shorts. It has not been.

JP 2012-077553 A JP 2004-181107 A

  The present invention can confirm the orientation of an absorbent article by touching the surface sheet with a hand, and can prevent the absorbent article from being mounted in a bent state with respect to underwear by tactile sense. About.

  The present invention is an absorbent article having a liquid-permeable surface sheet, a back sheet, and an absorbent body disposed between both sheets that form a skin-facing surface, wherein the surface sheet comprises heat-fusible fibers. And the two fiber layers are arranged so that a plurality of polygonal regions having a polygonal outline are formed, wherein the two fiber layers are compressed and thermally fused to each other. The plurality of polygonal regions are formed so as to be aligned along at least two different directions in the plan view of the topsheet, and the individual polygonal regions can be aligned on the plane without gaps. A polygonal area having a large polygonal shape and adjacent polygonal areas are arranged such that the sides of the polygons face each other and the two opposite sides are parallel to each other. , By a linear raised portion raised with respect to the fused portion. Each of the polygonal regions has a central raised portion surrounded by a plurality of the fused portions that are located inside the polygonal region to form a polygonal outline. The absorbent article has a rear indicating portion having a shape in plan view that is tapered toward the rear end in the vicinity of the rear end located on the rear end side in the longitudinal direction of the absorbent article. Is to provide.

  According to the absorbent article of the present invention, the orientation of the absorbent article can be confirmed by touching the surface sheet with a hand, and the absorbent article is mounted in a bent state with respect to the underwear by touch. It can be prevented. Moreover, a contact area with a wearer's skin is reduced and it is also possible to reduce the stickiness and stuffiness after liquid absorption.

FIG. 1 is a perspective view showing a state immediately before a sanitary napkin that is an embodiment of the absorbent article of the present invention is attached to underwear such as shorts. FIG. 2 is a partially enlarged plan view of the topsheet used in the absorbent article shown in FIG. FIG. 3 is an enlarged plan view showing details of a polygonal region in the top sheet shown in FIG. FIG. 4 is a partially enlarged perspective view of the top sheet used for the absorbent article shown in FIG. 1. 5 is a cross-sectional view taken along line II-II in FIG. FIG. 6 is an explanatory diagram of a more preferable shape of the rear indicating unit. FIG. 7A to FIG. 7E are plan views showing the shapes of the central raised portion and the rear indicating portion thereof in another embodiment of the present invention.

The present invention will be described below based on preferred embodiments with reference to the drawings.
A sanitary napkin 1 (hereinafter also simply referred to as “napkin 1”), which is an embodiment of the absorbent article of the present invention, has a long shape in a direction corresponding to the front-rear direction of the wearer, as shown in FIG. It has an absorbent main body 5, a pair of wing portions 7, 7, and a pair of rear flap portions 8, 8. With respect to absorbent articles such as sanitary napkins, the “longitudinal direction” is the same direction as the longitudinal direction of the absorbent main body 5 and, in an appropriate wearing state, is a direction that coincides with the wearer's front-rear direction when worn. , “Width direction” is a direction orthogonal to the longitudinal direction. The sanitary napkin of FIG. 1 is mainly used for night use, and preferably has a total length of 30 cm or more.

The napkin 1 has a front part A, a liquid excretion part facing part B, and a rear part C in the longitudinal direction X, and a pair of wing parts 7 on both left and right sides of the absorbent main body 5 in the liquid excretion part facing part B. 7. It has a pair of back flap parts 8 and 8 on the left and right sides of the absorbent main body 5 in the back part C. The excretion part facing part B is a part in which the wearer's liquid excretion part (vaginal opening, etc.) is disposed opposite to the central part in the width direction, and the front part A is the front side of the wearer from the liquid excretion part facing part B. The rear part B is a part arranged on the back side of the wearer from the liquid excretion part facing part B. When the excretory part facing part B has a wing part like the napkin 1 of the present embodiment, the wing part is arranged in the longitudinal direction of the absorbent article (the same as the longitudinal direction of the absorbent main body, the X direction in the figure). It is the area | region (area | region pinched | interposed into the base of the one side of the front-back direction of a wing part, and the base of the other side). The excretion part opposing part in the absorbent article which does not have a wing part is the transverse direction (width direction of an absorbent article, in the figure) generated when the absorbent article is folded into a tri-fold individual form. The two folding lines (not shown) crossing in the Y direction) are areas surrounded by the first folding curve and the second folding curve counted from the front end in the longitudinal direction of the absorbent article.
Moreover, in this specification, a skin opposing surface is a surface turned to a wearer's skin side at the time of wear in an absorbent article or its component, and a non-skin opposing surface is at the time of wear in an absorbent article or its component. It is a surface directed to the opposite side (usually clothing side) of the wearer's skin side.

  The napkin 1 includes a liquid permeable top sheet 2 that forms a skin facing surface, a liquid permeable back sheet 3 that forms a non-skin facing surface, and an absorbent body 4 positioned between the two sheets. The liquid poor permeability includes liquid impermeability and liquid impermeability. Moreover, the absorptive main body 5 has the structure where the surface sheet 2, the back surface sheet 3, and the absorber 4 were laminated | stacked and integrated in the thickness direction. A pair of three-dimensional guard forming sheets 6 and 6 are arranged on both sides of the napkin 1. The three-dimensional guard forming sheet 6 has an elastic member (not shown) for forming a three-dimensional guard in the vicinity of the edge near the article longitudinal center line CL, and when worn, due to the contraction force of the elastic member, In the excretion part opposing part B, the part of predetermined width from the said edge separates from the surface sheet 2, and forms a solid guard.

The surface sheet 2 in the napkin 1 of this embodiment is demonstrated with reference to FIGS.
As shown in FIG. 5, the surface sheet 2 in the present embodiment (hereinafter also simply referred to as “surface sheet 2”) includes two fiber layers 2A and 2B including heat-fusible fibers, and the two layers. The fiber layers 2A and 2B are thermally fused to each other in each of a large number of fused portions 21 regularly formed in a specific pattern. These fusion parts 21 are formed by pressurization and heating by hot embossing, and the fusion part 21 is a recess that is recessed toward the non-skin facing surface side.
In the present embodiment, the top sheet 2 is obtained by partially heat-sealing a lower layer mainly composed of heat-shrinkable fibers and an upper layer mainly composed of non-heat-shrinkable fibers by heat embossing. After that, the lower layer is obtained by heat shrinking the lower layer, and the lower layer including the heat-shrinkable fibers constitutes the fiber layer 2B on the non-skin facing side of the two fiber layers 2A and 2B. ing. Further, a part thermally fused by hot embossing is a fused part 21. Further, as shown in FIG. 2, the large number of fused portions 21 formed on the topsheet 2 are formed so as to generate a plurality of polygonal regions 22 having a rhombic square shape (polygonal shape).

Further, as shown in FIG. 2, these polygonal regions 22 are formed so as to be arranged along two different directions D <b> 1 and D <b> 2 in the plan view of the topsheet 2.
In the surface sheet 2 of the present embodiment, the two directions D1 and D2 in which the polygonal regions 22 are arranged are inclined at an inclination angle θ1 with respect to a straight line Lx parallel to the longitudinal center line CL of the napkin 1, as shown in FIG. A first direction D1 that inclines and a second direction D2 that inclines at an inclination angle θ2 in the opposite direction to the straight line Lx. The inclination angle θ1 and the inclination angle θ2 are each preferably 10 ° or more and 80 ° or less, more preferably 20 ° or more and less than 45 °, and further preferably 30 ° or more and less than 45 °. Further, it is preferable that the inclination angle θ1 and the inclination angle θ2 are the same as in the illustrated example.

  The outline of the polygonal region 22 in the present embodiment is a rhombic square shape. The rhombuses are shapes that can be arranged on the plane without gaps, and the polygonal regions 22 in the present embodiment are all rhombus shapes of the same shape and the same size, and the major axis of each rhombus is the napkin 1 It extends parallel to the longitudinal center line CL. Other examples of polygons that can be arranged on the plane without gaps include triangles, squares, hexagons, etc., but diamonds, squares, rectangles, parallelograms that can be arranged in the same direction. A hexagon or the like is preferable. The polygonal region 22 preferably has a line-symmetric shape with respect to the center line extending in the longitudinal direction of the napkin 1, and is also line-symmetric with respect to the center line extending in the width direction of the napkin 1. It is preferable.

Further, in the first direction D1 in which the plurality of polygonal regions 22 are arranged, the polygonal regions 22 and 22 adjacent to each other have polygon sides 24 and 24 facing each other and two sides 24 and 24 facing each other. They are arranged in parallel. Further, also in the second direction D2 in which the plurality of polygonal regions 22 are arranged, the polygonal regions 22 and 22 adjacent to each other have two sides 23 and 23 in which the polygonal sides 23 and 23 face each other and face each other. Are arranged in parallel.
Each polygonal region 22 is surrounded by a linear raised portion 25 that is raised with respect to the fused portion 21.
More specifically, as shown in FIG. 2, a second linear ridge 25b extending along the second direction D2 is formed between the polygonal regions 22 and 22 adjacent in the first direction D1, and the second direction A first linear raised portion 25a extending along the first direction D1 is formed between the polygonal regions 22 and 22 adjacent to each other in D2, and they form a lattice shape as a whole.
Each of the polygonal regions 22 is surrounded by two second linear raised portions 25b and two first linear raised portions 25a around the entire circumference.

  Each of the polygonal regions 22 is formed by arranging a plurality of fused portions 21 inside the polygonal region 22. More specifically, as shown in FIG. 3, four fusion portions 21 a to 21 d are arranged inside the polygonal region 22, and each of the four fusion portions 21 a to 21 d is a first one. Two first edge portions of a fusion portion adjacent to each other in the first direction D1 and having a linear first edge portion a along the first direction D1 and a linear second edge portion b along the second direction D2. A pair of sides along the first direction D1 of the polygonal region 22 is formed by a, and the second direction D2 of the polygonal region 22 is formed by the two second edges b of the fused portions adjacent in the second direction D2. Another pair of sides along the line is formed. A rhombus-shaped (polygonal) contour of the polygonal region 22 is formed by the pair of sides along the first direction D1 and the pair of sides along the second direction D2. Thus, each polygonal region 22 has a rhombus (polygonal) contour formed by the plurality of fused portions 21 a to 21 d located inside the polygonal region 22.

  In the topsheet 2 used in the present embodiment, each of the polygonal regions 22 has a central raised portion 26 in the vicinity of each central portion. The central raised portion 26 is surrounded by the plurality of fusion portions 21a to 21d forming the polygonal outline of the polygonal region 22, and the outline of the central raised portion 26 in plan view is the fusion thereof. It is formed by the central side edge portion c of the portions 21a to 21d. That is, as shown in FIG. 3, the plurality of fused portions 21 a to 21 d forming the polygonal region 22 are respectively contours of the central raised portion 26 at portions facing the polygonal corners of the polygonal region 22. A central side edge portion c is formed, and the central side edge portion c forms a contour of the central raised portion 26 in a plan view.

The central raised portion 26 is raised on the skin facing surface side with respect to the fused portions 21 a to 21 d, and the shape in plan view is in the vicinity of the rear end 26 e located on the rear end side in the longitudinal direction of the napkin 1. It has a rear-pointing portion 27 having a tapered shape toward 26e.
The tapered shape is a shape in which the length L1 in the width direction Y of the napkin (absorbent article) decreases toward the rear side Xe in the longitudinal direction of the napkin (absorbent article) as shown in FIG. It is. From the viewpoint of easily recognizing the rear of the article when touched by the hand, the rear instruction unit 27 includes a rear end 26e and two points P1 and P2 each having a linear distance of 3.0 mm from the rear end 26e. The angle θ formed by the connecting two straight lines La and Lb is preferably less than 150 degrees, more preferably less than 120 degrees, still more preferably less than 90 degrees, preferably 30 degrees or more, more preferably 60 degrees or more. . The position of the rear end 26e and the two points P1 and P2 when determining this angle θ is on the boundary line (the above-mentioned central side edge) between the fusion part 21 and the raised part rising from the fusion part. Set.

  According to the napkin 1 of the present embodiment, since the central raised portion 26 has the above-described rear-pointing portion 27 having the shape in plan view, as shown in FIG. 1, the wearer moves the front portion and the rear portion of the napkin, respectively. Even when the rear part held in the hand is difficult to be visually recognized by the wearer's body when worn with one hand, the wearer can move his / her finger from the rear instruction part 27 of the central raised part 26. It is possible to recognize in what direction the back of the napkin 1 is directed by the feeling received. Therefore, the wearer can move the rear part of the napkin 1 to the left and right to easily match the longitudinal direction of the napkin 1 with the front-rear direction of the underwear such as shorts. It can be worn in the right direction and applied to the wearer's body in an appropriate state.

Moreover, in the napkin 1 of this embodiment, the some fusion | fusion part 21a-21d which forms each polygonal area | region 22 in the surface sheet 2 surrounds the circumference | surroundings by the linear protruding part 25 over the perimeter. Therefore, even when the topsheet 2 is pressurized by the wearer's body pressure, the linear raised portion 25 resists the pressure, and the wearer's skin is brought into contact with the fused portions 21a to 21d. Hateful. Furthermore, the compressive strength of the topsheet increases as a whole by arranging the linear ridges 25 on the plane without any gaps. That is, when the topsheet 2 is pressed by the wearer's body pressure, not only the individual linear ridges 25 disperse the body pressure, but the linear ridges 25 are adjacent to each other without any gaps. It can resist body pressure with the whole surface sheet. Therefore, the topsheet 2 is less likely to buckle, and the skin of the wearer can be prevented from coming into contact with the fused portions 21a to 21d. The contact area with the skin of the wearer is kept low, the dry feeling after liquid absorption is improved, and the amount of liquid return to the skin is also reduced.
In addition, the shape of the central raised portion 26 can improve the design of the napkin 1 (absorbent article) on the skin-facing surface, and can also be expected to relieve the depressed mood during the menstrual period.

Moreover, in the surface sheet 2 of the napkin 1 of this embodiment, as shown in FIG.4 and FIG.5, the protrusion height from the melt | fusion part 21 is higher in the center protruding part 26 than in the linear protruding part 25. It has become. Thereby, when a wearer touches the surface of the surface sheet 2, a wearer's finger becomes easier to receive the sense from the back instruction | indication part 27. FIG.
From this point of view, it is preferable that the protruding height t6 of the central raised portion 26 from the fused portion 21 is 0.25 mm or more higher than the projected height t5 of the linear raised portion 25 from the fused portion 21. More preferably, the height is 0.50 mm or more. Moreover, the thickness of the part which has the center protruding part 26 is preferably 5 times or more, more preferably 10 times or more the thickness T2 in the fusion | melting part 21. On the other hand, the thickness of the portion of the topsheet 2 having the linear raised portions 25 is preferably 2.5 times or more, more preferably 5 times or more the thickness T2 of the fused portion 21.

From the same viewpoint, the total length L2 of the polygonal region 22 in the longitudinal direction X of the napkin (absorbent article) is preferably 20 mm or less, more preferably 15 mm or less, and preferably 5 mm or more, more preferably. Is 7 mm or more. The ratio of the total length L5 in the same direction of the central raised portion 26 to the total length L2 in the longitudinal direction X of the polygonal region 22 is preferably 10% or more, more preferably 20% or more, and preferably 90% or less. More preferably, it is 80% or less.
Further, the polygonal region 22 preferably has a rhombus or square plan view shape having a diagonal line parallel to the longitudinal direction of the napkin 1 (absorbent article), and the surface sheet in that case is one side of the rhombus or square. It is preferable that length L3 (refer FIG. 2) is 4.0 mm or more, More preferably, it is 5.0 mm or more.

  As shown in FIG. 5, the constituent fibers of the surface sheet 2 are consolidated in the individual fused portions 21 of the surface sheet 2, and the surface sheet 2 is compared with a portion that is not consolidated by hot embossing. The thickness t2 is the thinnest. That is, the fiber density in the fused part 21 is higher than that of the part that is not thermally fused, and is the highest in the top sheet 2. Depending on the embossing conditions, the fibers may be melted and solidified to form a film.

  Further, the width W (see FIG. 2) of the linear bulge portion 25 is equal to one side of the polygonal region 22 from the viewpoint of recognizing the positions and intervals of the plurality of central bulge portions 26 and making the rear side easy to understand by tactile sensation. Is preferably smaller than the length L3. More specifically, W / L3 is preferably 0.5 or less, and more preferably 0.3 or less. On the other hand, W / L3 is preferably 0.05 or more, and particularly preferably 0.1 or more, from the viewpoint of easy rear part recognition due to the shape stability of the central raised portion 26.

  In the napkin 1 of the present embodiment, the corner 22e at the rear end in the longitudinal direction of the polygonal region 22 is aligned with the rear end 26e of the central raised portion 26 on a virtual straight line (not shown) along the longitudinal direction. For this reason, the rear part of the napkin 1 is easily understood only by the touch of the hand.

  The surface sheet 2 used for the napkin 1 of the present embodiment has the highest fiber density in the fused portion 21, and a capillary force gradient is generated between the central raised portion 26 and the linear raised portion 25 and the fused portion 21. ing. Therefore, the excreted liquid is drawn into the fused portion 21 from the central raised portion 26 by a strong capillary force. Therefore, it is possible to separate the excretion liquid more reliably from the skin.

The formation material of the surface sheet 2 mentioned above is demonstrated.
As described above, as the upper layer used for the fiber layer 2A forming the skin facing surface side, for example, a web formed by a card method or a bulky nonwoven fabric is preferably used for the surface sheet 2. As a bulky nonwoven fabric, it is possible to give the surface sheet 2 a desired density gradient, and from the viewpoint that a good texture can be brought to the surface sheet 2, an air-through nonwoven fabric, an airlaid nonwoven fabric, A resin bond nonwoven fabric is preferably used. The web formed by the card method is a fiber assembly in a state before being made into a nonwoven fabric. That is, a fiber assembly in which fibers are in an extremely loose entanglement state after being subjected to a post-treatment applied to a card web used for manufacturing a nonwoven fabric, for example, a heat-sealing treatment by an air-through method or a calendar method. It is the body. When a web formed by the card method is used as an upper layer, the fibers in the upper layer are heat-sealed together or after the upper layer and the lower layer are bonded.
It is preferable that the upper-layer constituent fibers have substantially no heat shrinkability, or are fibers having a heat shrink temperature higher than that of the lower layer constituent fibers.
The basis weight of the upper layer, the touch aspects and topsheet 2 to form a sufficient density gradient from the viewpoint of good, preferably 10 to 50 g / m ^2, more preferably a 15 to 40 g / m ^2.

As the lower layer used for the fiber layer 2B that forms the non-skin facing surface side, a web formed by a card method or a nonwoven fabric having heat shrinkability can be used.
As the constituent fibers of the lower layer, those made of a thermoplastic polymer material and having heat shrinkability are preferably used. Examples of such fibers include latently crimpable fibers. The lower layer before heat shrinking has a heat shrinkable fiber content ratio (preferably a latent crimpable fiber content ratio) of preferably 50 mass% or more, more preferably 60 mass% or more, and even more preferably 70. The upper limit is 100% by mass.
Further, the content of the non-heat-shrinkable fiber in the upper layer is preferably 50% by mass or more, more preferably 60% by mass or more. The non-heat-shrinkable fiber may be one that does not heat-shrink, and heat-shrinks depending on the temperature, but as described above, it does not heat-shrink at the temperature at which the heat-shrinkable fiber in the lower layer shrinks. May be.

The latent crimpable fiber can be handled in the same manner as a conventional nonwoven fabric fiber before being heated, and has a property that a helical crimp is developed and contracted by heating at a predetermined temperature. Fiber.
The latent crimpable fiber is composed of, for example, an eccentric core-sheath type or side-by-side type composite fiber composed of two types of thermoplastic polymer materials having different shrinkage rates. Examples thereof include those described in JP-A-9-296325 and Japanese Patent No. 2759331. The lower layer can contain, for example, such latently crimpable fibers, and at the same time as or after heat fusion with the upper layer, crimps of the fibers can be expressed by heating to be shrunk. The basis weight of the lower layer is preferably 10 to 50 g / m ² , more preferably 15 to 40 g / m ² .

  The surface sheet according to the present invention includes, for example, an upper layer made of non-heat-shrinkable fibers or fibers having a higher heat shrinkage temperature than lower-layer fibers, and a heat-shrinkable fiber material before shrinkage having a lower heat-shrinkage temperature than upper-layer fibers. At the same time as the lower layer composed of a plurality of fused portions 21 are partially bonded together in a predetermined pattern or after both are bonded together, heat is applied and the lower layer is thermally contracted in the horizontal direction. . Although the fused portion 21 is not easily heat-shrinked, the upper layer and the lower layer are intermittently bonded and integrated by the fused portion 21, so that when the lower layer is thermally shrunk, the upper layer is entangled and distorted to try to shrink. . Due to this strain, a portion other than the fused portion 21 in the upper layer is greatly raised, whereby a linear raised portion 25 and a central raised portion 26 are formed. The heat fusion by the fusion part 21 is, for example, an embossed surface (a circumferential surface of an embossing roll or the like) in which a large number of embossing projections corresponding to the individual fusion parts 21 of the topsheet 2 are arranged in a predetermined pattern. ) Is pressed from the upper layer side in the laminated body of the upper layer and the lower layer, and the upper layer and the lower layer in the portion hot-pressed by the embossing convex portion are melted.

The surface sheet 2 formed by the above-described method preferably has a basis weight of 20 to 100 g / m ² , and more preferably 35 to 80 g / m ² .

  When the raised portions 25 and 26 are formed by using heat-shrinkable fibers in the lower layer and the whole, as shown in FIG. 3, the adjacent fused portions 21 in the plurality of fused portions 21 that form the polygonal region 22. It is preferable to provide a gap 28 between the fiber layers 2 </ b> A and 2 </ b> B that is not fused, or whose degree of fusion is weaker than that of the fusion part 21. By providing the gap 28, the gap 28 portion is raised, and a small raised portion 29 (see FIG. 4) that rises with respect to the fused portion 21 is formed, and when the lower layer is contracted after hot embossing, The plurality of fused portions 21 contract in a direction approaching each other, and a central raised portion 26 having a high protruding height t6 and easily perceived by a finger is formed. The small raised portion 29 has a lower protruding height than both the linear raised portion 25 and the central raised portion 26. In addition, the width of the small raised portion 29 is preferably narrower than the width of the linear raised portion 25.

  The material for forming the napkin 1 will be described. As the back sheet 3, the absorber 4, and the three-dimensional guard forming sheet 6, those similar to those conventionally used in the technical field can be used without particular limitation. For example, as the back sheet 3, a water-repellent nonwoven fabric having a high water pressure resistance such as a liquid-impermeable film made of a synthetic resin or a spunbond-meltblown-spunbond laminated nonwoven fabric can be used. Moreover, as the absorbent body 4, a fiber assembly made of a fiber material such as pulp fiber, or an absorbent core formed by holding a superabsorbent polymer therein, or a water-permeable core wrap sheet covering it. Can be used. As the three-dimensional guard forming sheet 6, a water-repellent nonwoven fabric having a high water pressure resistance, such as a spunbond-meltblown-spunbond laminated nonwoven fabric or the like can be used.

  The absorptive article of the present invention is not restricted to the embodiment mentioned above, and can be changed suitably.

  For example, in the topsheet of a two-layer structure, the upper layer includes a heat-extensible conjugate fiber that is elongated by heating, and the lower layer does not include the heat-extensible conjugate fiber or a smaller amount of the heat-extensible conjugate fiber than the upper layer. The intermediate sheet is subjected to heat embossing to form the fused portion 21, and then subjected to a heat treatment such as hot air treatment for extending the heat-extensible composite fiber, so that a raised portion (linear ridge) is formed on the upper layer side. Part, central raised part) may be formed. As the thermally extensible composite fiber, for example, those described in JP 2010-148730 A can be used.

In addition, the polygonal outline of each polygonal region may be formed by three or two fusion parts instead of four fusion parts, and may be formed by five or more fusion parts. May be.
Moreover, the protruding height from the fusion | melting part 21 may be the same as the linear protruding part 25 and the central protruding part 26, and the central protruding part 26 may be lower.
Moreover, the planar view shapes of the central raised portion 26 and the rear pointing portion 27 formed on the central raised portion 26 are not limited to the heart shape, and may be shapes as shown in FIGS. 7A to 7E, for example. . The central raised portion 26 shown in FIG. 7 (e) is symmetrical in shape, but the rear end side is made higher than the raised height of the linear raised portion, while the front end side is made lower than the raised height of the linear raised portion. It is possible to cause the rear end side to function as the rear instruction unit 27 by devising such as doing so.

  Further, the central raised portion 26 including the rear indicating portion 27 may be formed only in the rear portion C of the napkin 1 or may be formed only in a part from the rear end of the rear portion C. Moreover, it may be similarly formed over the entire surface sheet 2.

  Moreover, the absorbent article of this invention may not have the wing part 7, the back flap part 8, and the sheet | seat 6 for three-dimensional guard formation. In addition to the sanitary napkin, the absorbent article of the present invention may be a panty liner (origami sheet), an incontinence pad, or the like.

1 Sanitary napkin (absorbent article)
2 Surface sheet 2A, 2B Fiber layer 21, 21a-21d Fusion part 3 Back surface sheet 4 Absorber 5 Absorbent body 6 Three-dimensional guard forming sheet 7, 7 Wing part 8, 8 Rear flap part 21, 21a-21d Fusion Part 22 Polygonal region 25 Linear raised part 26 Central raised part 26e Rear end 27 Rear indicating part 28 Gap 29 Small raised part

Claims (3)

A liquid-permeable surface sheet that forms a skin facing surface, a back sheet, and an absorbent article having an absorber disposed between both sheets,
The surface sheet includes two fiber layers including heat-fusible fibers, and the fusion parts in which the two fiber layers are compressed and heat-bonded to each other have a polygonal outline. Arranged to produce a polygonal area,
The plurality of polygonal regions are formed so as to be aligned along at least two different directions in a plan view of the topsheet, and the individual polygonal regions can be aligned on the plane without gaps. And the polygonal regions adjacent to each other are arranged such that the sides of the polygons face each other and the two opposite sides are parallel to each other,
Each of the polygonal regions is surrounded by a linear ridge raised from the fusion part,
Each of the polygonal regions has a central ridge located inside the polygonal region and surrounded by a plurality of the fused portions forming a polygonal outline, and the central ridge is absorbed by In the vicinity of the rear end located on the rear end side in the longitudinal direction of the adhesive article, the shape in plan view has a rearward pointing portion that is tapered toward the rear end ,
The top sheet is an absorbent article in which the central bulge portion has a higher protruding height from the fused portion than the linear bulge portion . The surface sheet is
A lower layer mainly composed of heat-shrinkable fibers and an upper layer mainly composed of non-heat-shrinkable fibers are partially heat-sealed at the fusion part, and then obtained by heat-shrinking the lower layer. are those obtained, a lower layer comprising a heat-shrinkable fiber that is thermally contracted, constitutes the fibrous layer of the non-skin facing side of the fibrous layer of the two layers, absorbent article according to claim 1 . The polygonal region has a longitudinal direction parallel to the rhombic or square planar Migata shape having a diagonal of the absorbent article, the length of one side thereof is 4.0mm or more, according to claim 1 or 2 Absorbent articles.

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