JP2020039508A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of suppressing discomfort and unpleasantness at the time of wearing the absorbent article.SOLUTION: An absorbent article comprises: a body including a front face sheet, an absorbent body, and a rear face sheet; a line-shaped groove; and fixation means provided on the rear face sheet. The fixation means includes a plurality of fixation regions formed via an interval in the lateral direction on the body. The line-shaped groove includes: intermediate grooves that are positioned at fringes in the lateral direction on the body and extend in the longitudinal direction; and a front groove and rear groove that are positioned in front and back of the intermediate grooves, respectively, and extend across a center line. At least either of the front groove and rear groove has: a center convex part that includes a center maximum point on the center line and is convex outwardly in the longitudinal direction; and a right and left convex parts that are positioned on the fixation regions individually and are convex outwardly in the longitudinal direction more than the center convex part. The right and left convex parts are individually connected to the center convex part via minimum points positioned on the interval of the fixation means.SELECTED DRAWING: Figure 1

Description

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

Conventionally, in an absorbent article such as a sanitary napkin, a groove formed by integrally recessing a top sheet and an absorber toward a back sheet side on a skin facing surface thereof in order to improve leakage prevention and wearability. It is known to form
For example, in Patent Literature 1, a linear groove in which a topsheet and an absorber are integrally recessed toward the backsheet side is formed on the skin-facing surface of the absorbent main body. An absorbent article in which an adhesive portion made of a melt or the like is formed is described.

JP-A-2005-24001

  In a conventional absorbent article, the absorbent article may be deformed so that the absorbent article locally hits the skin due to a breakage of the absorbent main body, adhesion between the adhesive sections when the adhesive section is separated from the clothing, and the like. This caused discomfort in wearing and rubbing between the absorbent article and the skin.

  An object of the present invention relates to an absorbent article that can suppress discomfort and discomfort when worn.

An absorbent article according to an embodiment of the present invention includes a main body having a topsheet, an absorber and a backsheet, a linear groove provided on the topsheet side, and the main body provided on the backsheet for clothing. And a fixing means for fixing the main body. The main body has a vertical direction and a horizontal direction that are orthogonal to each other, and is divided into a left area and a right area by a center line that bisects the main body in the horizontal direction.
The fixing means has a plurality of fixing areas formed through a gap in the main body.
The linear groove,
A pair of intermediate grooves located on both lateral sides of the main body and extending in the vertical direction,
A front groove and a rear groove which are respectively located in front of and behind the intermediate groove and extend over the center line.
At least one of the front groove and the rear groove,
On or near the center line, including a central maximum point, and a central convex portion convex outward in the vertical direction,
A left and right convex portion that includes left and right maximum points respectively located on the fixed region, and that is more outwardly convex in the vertical direction than the central convex portion.
The left and right convex portions are respectively connected to the central convex portion by a minimum point located on a gap of the fixing means.

  As described above, according to the absorbent article of the present invention, discomfort and discomfort during wearing can be suppressed.

It is a top view showing the absorptive article concerning one embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1. It is a rear view of the said absorbent article. FIG. 3 is an enlarged plan view schematically showing a front region of the absorbent article. It is an enlarged plan view showing an absorbent article according to another embodiment of the present invention. It is a top view showing an absorptive article concerning yet another embodiment of the present invention. It is a top view showing an absorptive article concerning yet another embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Overall composition of napkin]
The absorbent article 1 according to the first embodiment of the present invention includes a main body M, a pair of wings W, and a linear groove 6, as shown in FIG. The absorbent article 1 is configured as a sanitary napkin, and is hereinafter referred to as a napkin 1.
The napkin 1 has a vertical direction X corresponding to the front-back direction of the wearer and a horizontal direction Y corresponding to the left-right direction of the wearer and orthogonal to the vertical direction X. Further, the napkin 1 has a thickness direction Z orthogonal to both the vertical direction X and the horizontal direction Y. In the present specification, in the thickness direction Z, a side close to the wearer's skin when worn may be referred to as an upper or skin side, and a side closer to clothing may be referred to as a lower or non-skin side.
The napkin 1 is divided into a left region L and a right region R by a center line C that bisects the main body M in the horizontal direction Y. In the present embodiment, the napkin 1 is configured symmetrically to the left and right, and the left region L and the right region R are configured to have the same shape.

  The main body M extends along the vertical direction X, and is fixed to the inner surface of the wearer's clothes when worn. The main body M has an absorber 4 to be described later, and has a function of absorbing a liquid substance such as menstrual blood of a wearer (hereinafter, also referred to as “liquid”).

The main body M is divided along the vertical direction X into a front area M1, an intermediate area M2, and a rear area M3.
The intermediate area M2 is an area facing the excretion area of the wearer when worn. In FIG. 1, an intermediate region M2 is a region between the front and rear base ends of the wing W in the main body M.
The front area M1 is an area disposed in front of the intermediate area M2 (abdomen of the wearer), and is configured to face the front of the excretion area of the wearer when worn.
The rear area M3 is an area arranged behind the intermediate area M2 (on the back side of the wearer), and is configured to face the rear of the excretion area of the wearer when worn.
Note that the term “wearing” as used herein means a state where a normal appropriate wearing position (an assumed wearing position of the napkin 1) is maintained, and does not include a case where the napkin 1 is shifted from the wearing position. .

  The wing portion W is configured to protrude largely outward in the lateral direction Y from the intermediate region M2 of the main body M.

  As shown in FIG. 2, the napkin 1 includes an absorber 4, a top sheet 2, a back sheet 3, and a pair of side sheets 5. In the main body M, the napkin 1 has a configuration in which the back sheet 3, the absorber 4, and the top sheet 2 are stacked in the thickness direction Z. These components are appropriately joined and integrated by, for example, joining with an adhesive or heat sealing, embossing with a linear groove 6, or the like.

The absorber 4 extends along the longitudinal direction X and is disposed between the top sheet 2 and the back sheet 3. As shown in FIG. 1, the front end of the absorber 4 is referred to as a front end 4a, and the rear end is referred to as a rear end 4b. The front end 4a and the rear end 4b may be curved or straight.
The absorber 4 absorbs the liquid from the surface on the side of the topsheet 2, diffuses the liquid inside, and holds the liquid. Specifically, the absorber 4 is formed of a laminate of the absorbent sheets 401 to 403, and has a thick high basis weight portion 42 in the intermediate region M2 as shown in FIG. Details of the absorber 4 will be described later.

  The topsheet 2 is configured as a liquid-permeable sheet material, and is disposed above the absorber 4 in the thickness direction Z. In addition, between the topsheet 2 and the absorber 4, the liquid permeability from the topsheet 2 to the absorber 4 is improved, and the liquid absorbed by the absorber 4 is prevented from returning to the topsheet 2. From the viewpoint, a second sheet (sub-layer sheet) may be arranged.

The back sheet 3 is disposed below the absorber 4 in the thickness direction Z. The back sheet 3 is joined to the top sheet 2 and the side sheet 5 by an adhesive, a heat seal, or the like, for example, at the periphery. The back sheet 3 may be joined to the absorber 4 with an adhesive or the like.
The back sheet 3 is formed of, for example, a sheet material having functions such as poor liquid permeability, water vapor permeability, and water repellency. As the sheet material, for example, a thermoplastic resin film or a laminate of the film and a nonwoven fabric can be used.

  The pair of side sheets 5 are arranged outside the top sheet 2 in the lateral direction Y. As the material of the side sheet 5, a sheet material having a lower hydrophilicity than the surface sheet 2 is preferable, and specifically, a nonwoven fabric, a film material, and a laminate structure of the nonwoven fabric and the film material having a lower hydrophilicity than the surface sheet 2 Sheet. Details of the side seat 5 will be described later.

[Configuration of fixing means]
As shown in FIG. 3, the fixing means 7 is provided on the back sheet 3 and has a function as a slip stopper for fixing the main body M to clothing. The fixing means 7 is provided not only on the main body M but also on the wing portion W.
The fixing means 7 is formed, for example, by applying an adhesive on the back sheet 3 in a predetermined pattern. As the pressure-sensitive adhesive used for the fixing means 7, a hot-melt pressure-sensitive adhesive such as a rubber-based, olefin-based, or ethylene vinyl acetate (EVA) -based adhesive is preferably used. Alternatively, as the fixing means 7, a mechanical fastener or the like may be used.

  In the main body M, the fixing means 7 has a plurality of fixing areas 71, 72, 73 formed with a gap 74 in the lateral direction Y. The fixed areas 71, 72, 73 are formed, for example, in a substantially rectangular shape extending in the vertical direction X. These fixing regions 71, 72, 73 are, for example, regions where a hot melt adhesive is applied densely. The term “densely coating” is not limited to a solid coating mode having no gap, but also includes a mode having a slight gap of 2 mm or less. For example, each of the fixed regions 71, 72, 73 may be formed by a dense spiral coating pattern, or may be formed by a coating pattern in which horizontal stripes are densely arranged.

The plurality of fixed areas 71, 72, 73 are also referred to as a center fixed area 71 and left and right fixed areas 72, 73.
The center fixing region 71 is formed including the center line C. In FIG. 3, the center fixed region 71 continuously overlaps with the center line C in the vertical direction X, but instead, the center line C and the center line C are located between the front end and the rear end of the middle-high fixed region 71. The ratio of the overlapping length of the central fixed region 71 in the vertical direction X is preferably 50% or more, more preferably 70% or more. Examples of such an embodiment include a case where the center fixed region 71 is discontinuous in the vertical direction X, and a case where portions meandering and overlapping the center line C and portions not overlapping do exist alternately.
The width of the central fixed region 71 in the lateral direction Y is determined in relation to the linear groove 6, but is preferably 2 mm or more and 30 mm or less, more preferably 5 mm or more and 15 mm or less.
The left and right fixed areas 72 and 73 are formed outside the center fixed area 71 on the left and right sides with a gap 74 therebetween. The width of the left and right fixed regions 72 and 73 in the horizontal direction Y is also determined in relation to the linear groove 6, and is preferably 1.5 mm or more and 30 mm or less, more preferably 10 mm or more and 20 mm or less.
The width of the gap 74 in the lateral direction Y is also determined in relation to the linear groove 6, and is 1.5 mm or more and 30 mm or less, more preferably 5 mm or more and 15 mm or less.
By configuring the linear grooves 6 in the following manner with respect to the fixing regions 71, 72, and 73 having such a shape, it is possible to suppress bending deformation that causes a feeling of discomfort and discomfort in the napkin 1. .

[Overall configuration of linear groove]
As shown in FIGS. 1 and 2, a linear groove 6 is formed on the napkin 1 on the top sheet 2 side.
The linear groove 6 is a linear groove formed on the peripheral edge of the main body M, and is formed by squeezing in the thickness direction Z from the surface sheet 2 side of the main body M. Thereby, as shown in FIG. 2, the linear groove 6 has a configuration in which the top sheet 2 and the absorber 4 are integrally recessed toward the back sheet 3.
The “linear shape” in the linear groove 6 is not limited to a linear shape in a plan view but includes a curved shape. Each line in the linear groove 6 may be a continuous line or a broken line. For example, the linear groove may be formed by forming a large number of discontinuous concave portions (for example, point embosses) in a row.

The linear groove 6 can be formed by a pressing method with or without heat, or an embossing method such as an ultrasonic embossing in a conventional manner. In the linear groove, the topsheet 2 and the absorber 4 are integrated by heat fusion or the like.
With such a configuration, the linear groove 6 has a higher rigidity as compared with other regions, and is a portion that is not easily deformed. For this reason, when the napkin 1 receives an external force, the linear groove 6 can also function as a base axis of elastic deformation that is likely to be preferable.

As shown in FIG. 1, the linear groove 6 has a front groove 61, an intermediate groove 62, and a rear groove 63. The front groove 61 is formed in a front area M1 of the main body M. The intermediate groove 62 is formed as a pair in the intermediate region M2 of the main body M. The rear groove 63 is formed in a rear area M3 of the main body M.
Note that the intermediate groove 62 may extend to the front area M1 and the rear area M2.
The gap between the front groove 61 and the middle groove 62 and the gap between the rear groove 63 and the middle groove 62 may be interrupted or continuous.

The intermediate grooves 62 are located on both sides in the horizontal direction Y of the main body M and extend in the vertical direction X. In FIG. 1, a pair of the intermediate grooves 62 is formed on the left and right, but a plurality of pairs may be formed.
The expression “the groove extends in the vertical direction X” is not limited to a state in which the vertical groove is continuous without being interrupted on the way, but is a relatively short length (approximately 8 mm or less) having no groove (non-recessed). Part) may be provided, and it is sufficient that the entire vertical groove is substantially continuous in the vertical direction X.

The front groove 61 extends forward in the vertical direction X from each of the left and right intermediate grooves 62, and both are connected near the front end of the main body M.
Similarly, the rear groove 63 extends rearward in the vertical direction X from each of the left and right intermediate grooves 62, and both of them are connected near the rear end of the main body M.
In addition, the front groove 61 and the rear groove 63 are not limited to one, and may appropriately have an auxiliary groove or the like extending in the lateral direction Y across the center line C.

  In the example shown in FIG. 1, the front groove 61 has a plurality of convex portions 64, 65, 66. The convex portions 64 to 66 are portions where the linear groove 6 is bent or curved in a linear shape convex outward (forward) in the vertical direction X. Each of the convex portions 64 to 66 has a maximum point located at the forefront in the vertical direction X. In the examples shown in FIGS. 1 and 4, the local maximum point is a point where a straight or curved groove is bent and the slope changes discontinuously, but a point located on a curve where the slope changes continuously. May be.

[Detailed configuration of front groove]
As shown in FIG. 4, the front groove 61 has a central convex portion 64 and left and right convex portions 65 and 66, and the left and right convex portions 65 and 66 are more forward than the central convex portion 64. It is configured to protrude.
The central convex portion 64 includes a central maximum point 64a on the center line C, and is configured to protrude outward (forward) in the vertical direction X. Note that the central maximum point 64 is not strictly limited to one disposed on the center line C, and may be located near the center line C. Here, the vicinity of the center line C means a range within 10% of the total length of the absorber 4 in the lateral direction Y on each of the left and right with respect to the position of the center line C.
The left and right convex portions 65 and 66 include left and right maximum points 65a and 66a located on the right and left fixed regions 72 and 73, respectively, and are configured to protrude more in the vertical direction X outward (forward) than the central convex portion 64. . The left and right convex portions 65 and 66 are connected to the central convex portion 64 by minimum points 65b and 66b located on the gap 74 of the fixing means 7, respectively.
In FIG. 4, for the sake of explanation, the local maximum points 64a, 65a, 66a and the local minimum points 65b, 66b are indicated by circles formed by alternate long and short dash lines.

  That is, the left and right maximum points 65a and 66a are located outside (periphery) in the vertical direction X and the horizontal direction Y with respect to the center maximum point 64a, and are located on the left and right fixed regions 72 and 73. Thereby, the peripheral edge of the front end portion 4a of the absorber 4 is fixed to the clothing at the time of wearing, and it is possible to prevent the linear groove 6 from being bent to the skin side as a folding line.

Further, in addition to the left and right maximum points 65a and 66a being located ahead of the central maximum point 64a, the minimum points 65b and 66b are located on the gap 74 and are not fixed to the clothes. For this reason, when an external force from the lateral direction Y is applied, the left and right convex portions 65 and 66 receive the external force, and the left region L and the right region R each have the convex portions 64 to 66 as a base axis in the thickness direction Z. It can be elastically deformed to swell.
Specifically, when the left convex portion 65 receives the above-described external force, the region between the left local maximum point 65a and the central local maximum point 64a fixed to the clothes by the fixing region 72 becomes the left side of the central convex portion 64. The portion and the left convex portion 65 are elastically deformed with the base axis. Similarly, when the right convex portion 66 receives the external force, the region between the right local maximum point 66a and the central local maximum point 64a fixed to the clothing by the fixing region 73 is the same as the right portion of the central convex portion 64. It elastically deforms with the right convex portion 66 as a base axis. By such elastic deformation, it is possible to prevent the external force from being concentrated near the center line C, and to suppress the deformation with the center line C as a broken line.
In addition, the elastic deformation in each of the left region L and the right region R suppresses the approach between the left region L and the right region R. Thereby, even when the left and right fixing regions 72 and 73 are separated from the clothing, it is possible to prevent the left and right fixing regions 72 and 73 from adhering to each other.
As described above, in the napkin 1 having the above-described configuration, it is possible to prevent the occurrence of a bending deformation that locally hits the skin, and to suppress a feeling of discomfort in wearing and rubbing.

Further, as shown in FIG. 4, the right and left maximum points 65a and 66a and the minimum points 65b and 66b, and the central maximum point 64a and the minimum points 65b and 66b are each formed in a curved shape that is outwardly convex. Here, the “outwardly convex curve” is a curve that is convex outward in the closed figure formed by the intermediate groove 62, the front groove 61, and the rear groove 63. That is, in the front groove 61, all portions (except for peripheral portions 65c, 66c described later) located inward in the horizontal direction Y from the left and right maximum points 65a, 66a are configured in a curved shape.
Accordingly, the left and right convex portions 65 and 66 are easily formed at positions along the peripheral edge of the absorber 4, and the peripheral edge of the absorber 4 can be more reliably prevented from being bent.
Furthermore, when the left and right convex portions 65 and 66 and the central convex portion 64 receive an external force, they can easily serve as a base axis for elastic deformation, and the effect of alleviating the external force can be enhanced.

  Further, since the fixing means 7 has the center fixing region 71, the center maximum point 64a is fixed to the clothes. Thereby, the buffering action of the external force from the lateral direction Y can be more reliably exerted.

The central convex portion 64 and the left and right convex portions 65 and 66 are configured symmetrically with respect to the center line C.
Thereby, the deformation to one of the right and left sides is prevented, and the occurrence of uncomfortable wearing and rubbing can be more effectively suppressed.

Further, in the left and right convex portions 65 and 66, the entire peripheral portions 65c and 66c extending from the left and right maximum points 65a and 66a toward the intermediate groove 62 are formed in a curved shape that is outwardly convex of the main body M. That is, the peripheral portions 65c and 66c do not have a constricted portion constricted inward in the lateral direction Y.
Thus, a large area surrounded by the left and right convex portions 65 and 66 can be secured, and the effect of reducing external force by elastic deformation based on the left and right convex portions 65 and 66 can be enhanced. Furthermore, by not having the constricted portion, the external force that the left and right convex portions 65 and 66 receive in the lateral direction Y can be released to the region between the front groove 61 and the intermediate groove 62. Thereby, generation | occurrence | production of a discomfort feeling and rubbing can be prevented more effectively.
In addition, the fact that the outermost portions in the lateral direction Y and the minimum points 65b and 66b in the peripheral portions 65c and 66c are shifted in the vertical direction X is more effective for the above-described relaxation effect. In particular, it is preferable that the minimum points 65b and 66b are shifted from the peripheral edges 65c and 66b toward the end in the vertical direction X.

[Additional description of this embodiment]
Hereinafter, the description of the present embodiment will be supplemented.

[Each dimension of the convex part of the linear groove]
The distance in the vertical direction X between the left and right maximum points 65a, 65b and the end of the absorber 4 is preferably from 2 mm to 20 mm, more preferably from the viewpoint of effectively preventing bending deformation at the end. 5 mm or more and 15 mm or less. The dimension in the vertical direction X from the minimum points 65b, 66b to the maximum points 65a, 65a in the left and right convex portions 65, 66 is preferably from the viewpoint of effectively preventing the napkin 1 from being broken centering on the center line C. It is 3 mm or more and 25 mm or less, more preferably 5 mm or more and 15 mm or less. Further, the dimension in the horizontal direction Y from the minimum points 65b, 66b to the maximum points 65a, 65a of the left and right convex portions 65, 66 is preferably 3 mm or more and 30 mm or less, more preferably 5 mm or more and 20 mm or less.
Further, the dimension from the center line C to each of the local maximum points 65a and 66a is preferably 5 mm or more and 40 mm or less, more preferably 10 mm or more and 25 mm or less, from the viewpoint of effectively preventing bending deformation at the ends.
The dimension in the vertical direction X from the minimum points 65b, 66b to the maximum point 64a in the central convex portion 64 is preferably 1 mm or more and 20 mm or less from the viewpoint of effectively preventing the napkin 1 from being centered on the center line C. And more preferably 3 mm or more and 10 mm or less. Further, the dimension in the horizontal direction Y between the minimum points 65b and 66b of the central convex portion 64 is preferably 5 mm or more and 30 mm or less, and more preferably 10 mm or more and 20 mm or less.

[Configuration of absorber]
As shown in FIG. 2, the absorbent body 4 has a structure in which an absorbent sheet 403 constituting the central absorbent body 41 is sandwiched between two absorbent sheets 401 and 402 constituting the main body absorbent body 40. With such a configuration, the thickness of the absorber 4 can be reduced while maintaining the absorbing power.
The main body absorber 40 forms the outer shape of the absorber 4. The absorbent sheets 401 and 402 constituting the main body absorber 40 have a substantially rectangular shape with rounded corners in plan view, and extend from the front region M1 to the rear region M3 via the intermediate region M2. These absorbent sheets 401 and 402 have the same shape and size.
The central absorber 41 is arranged so as to overlap a part of the main body absorber 40 and is configured to be smaller than the main body absorber 40. The central absorber 41 has a substantially rectangular shape in plan view, and is disposed over the intermediate region M2 and the vicinity thereof. The central absorbent body 41 is formed by folding one absorbent sheet 403 into a two-layer structure, and is disposed between the two absorbent sheets 401 and 402 constituting the main body absorbent body 40.
The central absorbent body 41 (the absorbent sheet 403) forms the high basis weight portion 42 by the folded absorbent sheet 403. The high basis weight portion 42 is formed in the intermediate region M2, and is a portion in which the number of laminated sheets of the absorbent sheet constituting the absorber 4 is larger than the portion located around the absorbent sheet and the thickness is large. For this reason, the napkin 1 forms a raised portion protruding toward the topsheet 2 (the side of the napkin 1 facing the skin) in the intermediate region M2. By configuring the high basis weight portion 42, the absorption capacity of a part of the absorber 4 can be easily and efficiently increased.
The center absorbent body 41 may be laminated on the upper absorbent sheet 401 constituting the main body absorbent body 40, instead of being disposed between the two absorbent sheets 401 and 402 constituting the main body absorbent body 40. Then, the lower absorbent sheet 402 constituting the main body absorbent body 40 may be laminated on the non-skin-facing surface side. Further, the absorbent sheets 401, 402, and 403 may not be joined, or may be adhered by an adhesive or the like sparsely dispersed.

[Thickness of absorber]
The thickness of the high basis weight portion 42 of the absorber 4 is preferably 0.7 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, and more preferably 4 mm or less. More specifically, the thickness of the high basis weight portion 42 is preferably 0.7 mm or more and 5 mm or less, and more preferably 1 mm or more and 4 mm or less. By setting the thickness of the high basis weight portion 42 in this range, it is easy to achieve both good wearing feeling and high absorption performance in the intermediate region M2 where the high basis weight portion 42 is formed. In addition, when the absorbent article has the wing W as in the napkin 1 of the present embodiment, it is easy to suppress the absorber from being twisted in the intermediate region M2 when the absorbent article is worn. Regarding the thickness of the absorbent body 4 other than the high basis weight portion 42, that is, the thickness of the main body absorbent body 40 (the laminate of the two absorbent sheets 401 and 402) is preferably 0.3 mm or more, and more preferably 0.5 mm or more. And preferably 3 mm or less, more preferably 2.5 mm or less. More specifically, the thickness of the main body absorber 40 is 0.5 mm or more and 3 mm or less, and more preferably 0.6 mm or more and 2.5 mm or less, to enhance high absorption performance and followability of the wearer's movement. Preferred from a viewpoint.

  Further, in the absorber 4, the difference in thickness (step) between or near the boundary between the high basis weight portion 42 and its peripheral portion is preferably 2 mm or less, and more preferably 1.5 mm or less. The purpose of this is to suppress the occurrence of twisting near the boundary between the high basis weight portion 42 and the region where only the main body absorber 40 exists in the peripheral portion in the intermediate region M2. If the step is large, when the napkin 1 follows the movement of the wearer during wearing, the gap due to the step is sought to be filled, and as a result, the twist may easily occur due to the influence of the step. By setting the value in the above range, the effect of suppressing the occurrence of the deflection in the intermediate region M2 is enhanced. The thickness of each part of the above-mentioned absorber 4 is measured by the following method.

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

[Configuration of side seat]
As shown in FIG. 1, each of the pair of side sheets 5 includes a linear first joining line 51 located in the intermediate region M2 and a front and rear portion of the first joining line 51 in the longitudinal direction X (a front region M1 and a rear region). It is joined to the topsheet 2 with the linear second joining line 52 located at M3). The first joining line 51 has a curved shape projecting outward in the horizontal direction Y in plan view, and the second joining line 52 has a linear shape (zigzag line) extending so as to intersect in the vertical direction X in plan view. State). As described above, when the side sheet 5 is joined to the skin facing surface (top sheet 2) of the main body M at the joining lines 51 and 52, as shown in FIG. A space P is formed by the side sheet 5 and the top sheet 2 inward. Since the space P is opened toward the center of the main body M in the lateral direction Y, excreted liquid such as menstrual blood flowing outward from the center in the lateral direction Y is accommodated in the space P. As a result, leakage of the liquid is effectively prevented.

[Other embodiments]
In the front groove 61 in which the convex portions 64 to 66 are formed, the shape between the left and right maximum points 65a and 66a and the minimum points 65b and 66b is not limited to a curved shape, but is straight as shown in FIG. It may be configured in a shape. This can also suppress the occurrence of discomfort and rubbing caused by the napkin 1 being locally applied to the skin.
Further, in the front groove 61 in which the convex portions 64 to 66 are formed, only the peripheral portions 65c and 66c may be linear, and the others may be curved, or at least a part between the local maximum point and the local minimum point. It may be linear.

  As shown in FIG. 6, in the napkin 1, both the front groove 61 and the rear groove 63 may have a configuration having a central convex portion 64 and left and right convex portions 65 and 66. Accordingly, in the rear region M3 as well as in the front region M1, it is possible to suppress the occurrence of uncomfortable wearing and rubbing caused by the napkin 1 being locally applied to the skin.

  Further, in the napkin 1, only the rear groove may have the central convex portion 64 and the left and right convex portions 65 and 66.

  By the way, instead of the napkin 1, the fixing area 75 of the fixing means 7 may extend in the horizontal direction Y and be formed in the vertical direction X with a gap 76 as shown in FIG. . Also in this case, the convex portions 64 and 65 overlap the fixed region 75, but the minimum points 65b and 66b do not overlap with the fixed region 75. Therefore, the same effects as in the above-described embodiment can be obtained. However, as in the above-described embodiment, when the fixing regions 71, 72, and 73 extend in the vertical direction X and are formed in the horizontal direction Y with the gap 74 therebetween, the existence of the gap 74 extending in the vertical direction X exists. Therefore, it is advantageous to obtain the effects of the present invention.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it is needless to say that various changes can be made without departing from the spirit of the present invention.

  In the above embodiment, the example of the sanitary napkin was shown as the absorbent article, but the absorbent article is not limited to this. The absorbent article of the present invention may be, for example, a urine absorbing pad, a vaginal discharge sheet, a disposable diaper, or the like.

For example, the napkin 1 may not have the wing portion W, or may be configured to be long in the vertical direction X for night use and have a rear flap in the rear region M3.
The intermediate region M2 having no wing W is a vertical direction defined by a folding curve (not shown) along the horizontal direction Y, which is generated when the napkin 1 is folded into a three-fold individual packaging form. It is an area at the center of X or an area smaller than the area.

  Further, the fixing means 7 is not limited to the configuration having the three fixing areas 71, 72, 73, and may have a configuration having two left and right fixing areas, or may be divided into four or more fixing areas.

1. Napkin (absorbent article)
2 top surface sheet 3 back surface sheet 4 absorber 6 linear groove 61 front groove 62 intermediate groove 63 rear groove 64 central convex portion 64a central maximum point 65, 66 left / right convex portion (left side) Convex part, right convex part)
65a, 66a: left and right maximum point 65b, 66b: minimum point 7: fixing means 71, 72, 73, 75: fixing area M: body C: center line

Claims (5)

A main body having a top sheet, an absorber and a back sheet, a linear groove provided on the top sheet side, and fixing means provided on the back sheet to fix the main body to clothing, An absorbent article having a vertical direction and a horizontal direction orthogonal to each other, and divided into a left area and a right area by a center line that bisects the main body in the horizontal direction,
The fixing means has a plurality of fixing areas formed through a gap in the main body,
The linear groove,
A pair of intermediate grooves located on both lateral sides of the main body and extending in the vertical direction,
A front groove and a rear groove located in front of and behind the intermediate groove and extending across the center line,
At least one of the front groove and the rear groove,
On or near the center line, including a central maximum point, a central convex portion convex outward in the vertical direction,
Including the left and right maximum points respectively located on the fixed region, and having a left and right convex portion that is more outwardly convex in the vertical direction than the central convex portion,
The absorbent article, wherein the left and right convex portions are respectively connected to the central convex portion by a minimum point located on a gap of the fixing means. The absorbent article according to claim 1, wherein the portion between the left and right maximum points and the minimum point and the portion between the central maximum point and the minimum point are each formed in a curved shape that is outwardly convex. The plurality of fixing means are formed with a gap in the lateral direction,
The absorbent article according to claim 1, further comprising a central fixing region that extends in the longitudinal direction including the center line. The absorbent article according to any one of claims 1 to 3, wherein the central convex portion and the left and right convex portions are configured symmetrically with respect to the central maximum point. The said right-and-left convex part WHEREIN: The whole peripheral part extended toward the said intermediate groove | channel from the said right-and-left maximum point is comprised in the curved shape convex outside the said main body. Absorbent articles.

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