JP2022088702A - Absorbent article - Google Patents

Abstract

To provide an absorbent article where visual discomfort and bodily sensitive discomfort given to a wearer are reduced.SOLUTION: An absorbent article is provided with a surface sheet, a rear surface sheet, and an absorber. The absorber is a material of the highest absorption capacity of members composing the absorbent article. The absorbent article is provided with a colored second sheet positioned between the surface sheet and the absorber by covering the absorber in a planar view. A skin side surface of the absorbent article has a pair of back and forth leakage prevention horizontal grooves where the surface sheet and the colored second sheet that do not reach the absorber toward the non-skin side surface of the absorbent article are integrally compressed. Each of the pair of leakage prevention horizontal grooves has a projection projecting outward in the vertical direction in a planar view, and projecting ends of the pair of leakage prevention horizontal grooves are positioned in an area in the vertical direction of the absorber in the planar view. The absorbent article has a pair of left and right first constricted parts and a pair of left and right second constricted parts provided on left and right both side edges along the vertical direction of an excretion part opposite area. The leakage prevention horizontal grooves do not cross a first virtual line connecting the pair of first constricted parts and a second virtual line connecting the pair of second constricted parts in a planar view.SELECTED DRAWING: Figure 1

Description

The present invention relates to absorbent articles such as panty liners, vaginal discharge sheets, and sanitary napkins.

The absorbent article is configured by arranging an absorber between the front surface sheet and the back surface sheet. In general, the absorbent article has a shape in which the horizontal direction corresponding to the width direction of the wearer is narrow and the shape is long in the vertical direction corresponding to the front-back direction. May be controlled or increased absorption capacity. Since liquid diffusion in the surface sheet constituting the absorbent article leads to wet discomfort, a leak-proof groove formed by integrally pressing the surface sheet and the absorber is provided to prevent unintended liquid diffusion or to the absorber. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-68991

In the absorbent article, the leak-proof groove is a region having a high density that is integrally squeezed from the surface sheet side to the absorber, and is a region where body fluid from the wearer is more likely to be drawn in and a liquid pool is likely to occur. Therefore, in the leak-proof groove, the body fluid color is easily noticeable, which may cause visual discomfort to the wearer.
Further, in the absorbent article, the absorbent body may be deformed unfavorably, resulting in a decrease in the absorbent performance, and as a result, the wearer may be perceived to feel uncomfortable when wearing the article.

An object of the present invention relates to the provision of an absorbent article in which the visual discomfort and the perceived discomfort given to the wearer are reduced.

The absorbent article according to one embodiment of the present invention includes a front surface sheet, a back surface sheet, and an absorber.
The absorbent article has a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction.
The absorbent article has an excretion portion facing region located in the central portion in the vertical direction, a front region located vertically forward from the excretion portion facing region, and a rear portion located vertically rearward from the excretion portion facing region. Has an area.
The surface sheet is located on the skin side surface of the absorbent article.
The back sheet is located on the non-skin side of the absorbent article.
The absorber is located between the front surface sheet and the back surface sheet, and its vertical length is shorter than that of the front surface sheet and the back surface sheet. The absorber is a member having the highest absorption capacity among the members constituting the absorbent article.
The absorbent article includes a colored second sheet located between the surface sheet and the absorbent body so as to cover the absorbent body in a plan view.
The skin side surface of the absorbent article has a pair of front and rear leak-proof lateral grooves in which the surface sheet and the colored second sheet that do not reach the absorber toward the non-skin side surface of the absorbent article are integrally squeezed. Each of the pair of leak-proof lateral grooves has a convex shape protruding outward in the vertical direction in a plan view, and the tip of the convex portion of the pair of leak-proof lateral grooves projects in the vertical direction of the absorber in a plan view. Located within the area of.
The absorbent article has a pair of left and right first constrictions and a pair of left and right second constrictions provided on both left and right edges along the vertical direction of the area facing the excretion portion.
The leak-proof lateral groove does not straddle the first virtual line connecting the pair of first constrictions and the second virtual line connecting the pair of second constrictions in a plan view.

As described above, according to the absorbent article of the present invention, it is possible to reduce the discomfort during wearing.

FIG. 3 is a plan view showing an absorbent article in a state where an individual packaging sheet is attached, which is obtained by opening and unpacking a folded and individually packaged absorbent article according to an embodiment of the present invention. It is an enlarged cross-sectional view which shows the cross section cut by the line II-II of FIG. 1 which omitted the illustration of the individual packaging sheet. It is a top view which shows an example of the coating area and the coating pattern of the first adhesive S1 arranged between the surface sheet and the colored second sheet when the absorbent article is viewed in a plan view. It is a top view which shows an example of the coating area and coating pattern of the 2nd adhesive S2 arranged between a colored second sheet and an absorber when the absorbent article is viewed in a plan view. It is a top view which shows an example of the coating area and the coating pattern of the 3rd adhesive S3 arranged between the back surface sheet and the absorber when the absorbent article is viewed in a plan view. It is a top view which shows an example of the coating area and coating pattern of the 4th adhesive S4 used for the absorber which constitutes a part of the absorbent article. FIG. 5 is a plan view showing another example of the coating pattern of the second adhesive S2 arranged between the colored second sheet and the absorber in the absorbent article. It is a top view of the other absorbent article which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, a panty liner will be described as an example of an embodiment of an absorbent article. Panty liners are generally attached to the inner surface of the crotch part of underwear such as shorts from the time when the amount of menstrual blood in the late menstrual period is low to the non-menstrual period, and are used to absorb body fluids such as vaginal discharge, menstrual blood, or urine. Be done. Therefore, since the panty liner is rarely used for the purpose of absorbing a large amount of menstrual blood, it is generally configured to be narrower and thinner than other body fluid-absorbing articles such as menstrual napkins. Will be done.

<Overall composition of panty liner>
As shown in FIG. 1, the panty liner 1 as an absorbent article of the present invention 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. And have. The lateral direction of the panty liner 1 corresponds to the width direction of the panty liner 1.
In the present specification, with respect to the thickness direction Z of the panty liner 1, the side close to the wearer's skin may be referred to as the upper or skin side, and the side close to the clothing may be referred to as the lower or non-skin side. Further, in the present specification, the "skin side surface" is a surface of the absorbent article or its constituent members that is directed toward the wearer's skin side when the absorbent article is worn, that is, a side relatively close to the wearer's skin. be. The "non-skin side surface" is a surface of the absorbent article or its constituent members that is directed toward the side far from the wearer's skin when the absorbent article is worn. The term "when worn" as used herein means a state in which the normal proper wearing position, that is, the correct wearing position of the absorbent article is maintained. Further, in the present specification, the "planar view" means a plan view seen from the thickness direction Z.
Further, here, for convenience, they are referred to as front and back with reference to the front-back direction when worn. The panty liner 1 has an outer shape that becomes axisymmetric with the virtual horizontal line as an axis when a virtual horizontal line extending in the Y direction that bisects the vertical direction X is drawn, and the panty liner 1 has a vertical X in the vertical direction. It is configured so that either end of the sword can be worn forward.

As shown in FIG. 1, the panty liner 1 extends along the vertical direction X and is fixed to the inner surface of the wearer's clothing by an adhesive portion arranged on the non-skin side surface 1b of the panty liner 1 when worn. The panty liner 1 has an absorber 4 described later, and has a function of absorbing liquid substances (hereinafter, also referred to as “body fluid”) such as menstrual blood, vaginal discharge, and urine of the wearer.

The panty liner 1 is divided into a front region 51, an excretion portion facing region 52, and a rear region 53 along the vertical direction X.
The excretion section facing region 52 is a region facing the wearer's fluid excretion section (vaginal opening, urethral opening) when worn and to which body fluid is mainly supplied. The excretion portion facing region 52 is arranged in the central portion of the panty liner 1 in the vertical direction X. In the panty liner 1 of FIG. 1, the region X in the vertical direction of the excretion portion facing region 52 corresponds to the entire length of the absorber 4 described later in the vertical direction X, that is, the region from the front tip portion to the rear tip portion of the absorber 4. do.
The anterior region 51 is a region arranged in front of the excretion portion facing region 52 (ventral side of the wearer), and is configured to face the front of the excretion portion facing region of the wearer when worn.
The rear region 53 is a region arranged behind the excretion portion facing region 52 (dorsal side of the wearer), and is configured to face the rear of the wearer's excretion portion facing region when worn.

The panty liner 1 may be packaged in an individual packaging sheet from the viewpoint of hygiene and portability. As shown in FIG. 1, the individually packaged panty liner 10 has a panty liner 1 and an individual packaging sheet 9 arranged on the non-skin side surface 1b of the panty liner 1.
As shown in FIG. 2, the panty liner 1 has a skin side surface 1a and a non-skin side surface 1b.
The panty liner 1 is folded at two points when the skin side surface 1a of the panty liner 1 is set as the upper surface at the time of individual packaging, and is held in a tri-folded state. Therefore, as shown in FIG. 1, the panty liner 1 has two first folding lines 31 and a second folding line 32 along the horizontal direction Y by being folded in the vertical direction X. It is formed. The first individual folding line 31 is located in front of the second individual folding line 32.
In the example shown in FIG. 1, the first individual folding line 31 is at the same position as the virtual horizontal line 34 extending in parallel with the horizontal direction Y passing through the front tip portion in the vertical direction X of the absorber 4, which will be described later. The second individual folding line 32 is at the same position as the second virtual line 22 connecting the pair of second constricted portions 12 which will be described later.
In the state of the individually wrapped panty liner 10, for example, the panty liner 1 is folded by the second folding line 32 so that the skin side surface 1a is inside, and then the skin side surface 1a is inside. It is folded by the first individual wrapping line 31.
Hereinafter, when explaining the configuration of the panty liner in the individually wrapped state, it is clearly stated that the panty liner is in the individually wrapped state. Unless otherwise specified, as shown in FIG. 1, the configuration of the panty liner in the unfolded state is described.

As shown in FIG. 2, the panty liner 1 is composed of a member such as an absorber 4, a front surface sheet 2, a back surface sheet 3, and a colored second sheet 5. The surface sheet 2 constitutes the skin side surface 1a of the panty liner 1. The back sheet 3 constitutes the non-skin side surface 1b of the panty liner 1. The panty liner 1 has a configuration in which a back surface sheet 3, an absorber 4, a colored second sheet 5, and a front surface sheet 2 are laminated in the thickness direction Z. These configurations are appropriately joined by, for example, joining with an adhesive, heat sealing, or the like, embossing with a pressing groove, or the like. Details will be described later.

<Outer shape of panty liner>
The panty liner 1 has a front edge 16a, a trailing edge 16b, a left edge 17a and a right edge 17b.
In a plan view, the panty liner 1 has a pair of left and right first constrictions 11 and a pair of left and right second constrictions 12 that divide the panty liner 1 into three along the vertical direction X. The pair of left and right first constrictions 11 and the pair of left and right second constrictions 12 are provided on the left and right side edges 17a and 17b along the vertical direction X of the panty liner 1. The panty liner 1 has a total of four constrictions.
In a plan view, the pair of left and right first constrictions 11 and the pair of left and right second constrictions 12 are located in the excretion portion facing region 52. The pair of left and right first constrictions 11 and the pair of left and right second constrictions 12 are intermittently arranged in the vertical direction X. In the panty liner 1, the first constriction portion 11 is located in the front in the vertical direction X, and the second constriction portion 12 is located in the rear.

The first constriction portion 11 and the second constriction portion 12 each have a width (dimension in the lateral direction Y) of the panty liner 1 from the front region 51 to the rear region 53 along the vertical direction X. This is the part where the width changes from decreasing to increasing. The first constriction portion 11 and the second constriction portion 12 may be a portion having a certain length in the vertical direction X of the panty liner 1, or may be a portion specified by a single point having no length. There may be. In the panty liner 1 shown in FIG. 1, the positions of the first constricted portion 11 and the second constricted portion 12 are specified at one point. The first constricted portion 11 on the left edge 17a and the first constricted portion 11 on the right edge 17b are located at the same position when the panty liner 1 is viewed along the vertical direction X. The same applies to the second constricted portion 12.

The line segment passing through the pair of left and right first constricted portions 11 is called the first virtual line 21. The line segment passing through the pair of left and right second constricted portions 12 is called the second virtual line 22. The first virtual line 21 and the second virtual line 22 are straight lines extending in parallel with the lateral direction Y. When the first constricted portion 11 and the second constricted portion 12 are portions having a certain length, for example, several mm, with respect to the vertical X of the panty liner 1, the longitudinal length of the portions. The first virtual line 21 and the second virtual line 22 are linear virtual wide lines extending parallel to the horizontal direction Y having a width.

The panty liner 1 is divided into three parts along the vertical direction X by a pair of left and right first constricted portions 11 and a pair of left and right constricted portions 12, a front portion F, a central portion C, and a rear portion R. To. The central portion C is an area between the first virtual line 21 and the second virtual line 22. The front portion F is located in front of the central portion C. The rear portion R is located behind the central portion C. The panty liner 1 is substantially divided into three equal parts along the vertical direction X by the first virtual line 21 and the second virtual line 22, and the lengths of the front portion F, the central portion C, and the rear portion R in the vertical direction X are approximately the same. It is the same.
In a plan view, the first virtual line 21 and the second virtual line 22 are located in the excretion section facing region 52. The excretion portion facing region 52 includes a central portion C, a portion of the anterior portion F, and a portion of the posterior portion R.

As shown in FIG. 1, when viewed along the vertical direction X of the panty liner 1, the front portion F has a portion b whose width is not constant and has a maximum width (this portion is referred to as a “maximum width portion b”. ) Is owned by one. The maximum width portion b is a portion in the front portion F where the width changes from an increase to a decrease, and is located in the front region 51.
The width of the front portion F gradually decreases from the maximum width portion b toward the first constricted portion 11. Further, the width of the front portion F gradually decreases from the maximum width portion b toward the tip end portion of the front end edge 16a. From the maximum width portion b to the first constricted portion 11, both side edges 17a and 17b of the front portion F are substantially linear. On the other hand, between the maximum width portion b and the tip portion of the front end edge 16a, a gentle arc shape convex toward the tip portion is formed. The front end edge 16a and the both side edges 17a and 17b are smoothly connected to each other.

When the panty liner 1 is viewed along the vertical direction X, the rear portion R has one portion c (this portion is referred to as "maximum width portion c") having a maximum width and the width is not constant. .. The maximum width portion c is a portion where the width changes from an increase to a decrease in the rear portion R, and is located in the rear region 53 in a plan view.
The width of the rear portion R gradually decreases from the maximum width portion c toward the second constricted portion 12. Further, the width of the rear portion R gradually decreases from the maximum width portion c toward the tip portion of the rear end edge 16b. From the maximum width portion c to the second constricted portion 12, both side edges 17a and 17b of the rear portion R are substantially linear. On the other hand, between the maximum width portion c and the tip portion of the rear end edge 16b, a gentle arc shape convex toward the tip portion is formed. The trailing edge 16b and the side edges 17a and 17b are smoothly connected to each other.

As shown in FIG. 1, the side edges 17a and 17b of the panty liner 1 are located between the pair of left and right first constrictions 11 and the pair of left and right second constrictions 12, that is, in the central portion C, in the lateral direction Y. It has a pair of left and right convex-shaped portions 15 that project outward.
When the panty liner 1 is viewed along the vertical direction X, the central portion C has one portion a (this portion is referred to as "maximum width portion a") having a maximum width and the width is not constant. .. The maximum width portion a is the maximum width portion in the lateral direction Y between the pair of left and right convex portions 15. The maximum width portion a is a portion in the central portion C where the width changes from an increase to a decrease.
The convex portion 15 has a gentle arc shape that is convex toward the outside in the lateral direction Y. The maximum width portion a is formed at a position where the central portion C is bisected in the front-rear direction in the vertical direction X. The width of the central portion C gradually decreases from the maximum width portion a toward the first constricted portion 11. The width of the central portion C gradually decreases from the maximum width portion a toward the second constricted portion 12.

When the first constriction portion 11 and the second constriction portion 12 are worn, when a force is applied to the panty liner 1 due to the movement of the wearer or the like, the panty liner 1 is moved in the vertical direction X via the side edge of the panty liner 1 or the like. It has the function of buffering the propagating twist or stress and reducing its influence. As a result, even if a twist occurs in the front portion F, the central portion C, and the rear portion R, the twist does not easily spread to the entire panty liner, and the twist in the panty liner 1 is effectively prevented.
Further, since the both side edges 17a and 17b (left side edge 17a and right side edge 17b) of the central portion C have a convex arc shape toward the outside in the lateral direction Y, the panty liner 1 is formed from both legs of the wearer when worn. When a force inward in the lateral direction Y is applied to the center portion C, the deformation of the central portion C is prevented by the resistance force generated due to the shape of both side edges, so that the central portion C is less likely to be twisted.
Here, the panty liner is generally thinner than other absorbent articles such as menstrual napkins, and it is difficult to prevent twisting by utilizing the rigidity by increasing the thickness. However, in the present embodiment, the panty liner is provided with the first constriction portion 11 and the second constriction portion 12, and the side edges 17a and 17b of the central portion C are formed into a shape that is convex outward in the lateral direction Y. It is possible to prevent twisting without increasing the thickness. As a result, it is possible to make it difficult to give a feeling of discomfort when wearing it due to kinking, and it is possible to suppress the occurrence of deterioration of absorption performance due to kinking and reduce the perceived discomfort given to the wearer.

Further, since the side edges 17a and 17b of the central portion C have a shape protruding outward in the lateral direction Y, the area of the central portion C is visually felt to be wide, so that lateral leakage is prevented. It is possible to give the wearer a sense of security regarding the absorption performance. Moreover, since the area of the central portion C can be actually secured widely, the absorption capacity of the body fluid can be increased.

Further, as shown in FIG. 1, in the panty liner 1, the maximum width portion a is narrower than the maximum width portion b in the front region 51 and the maximum width portion c in the rear region 53. As described above, the width of the anterior region 51 and the posterior region 53 in which the excretion portion facing region 52, which is more likely to receive the force from the wearer's legs, is less likely to receive the force from the wearer's legs than the excretion portion facing region 52 ( By making it narrower than the dimension of the lateral direction Y), it is possible to reduce the feeling of discomfort in wearing as compared with widening the width of the excretion portion facing region 52. Further, by making the maximum width portion b in the front region 51 and the maximum width portion c in the rear region 53 wider than the maximum width portion a in the excretion portion facing region 52, a wide absorption area of the entire panty liner 1 is secured. And the absorption capacity can be increased. Even if a large amount of body fluid is excreted at once, it is possible to deal with an unintended fluid flow and give the wearer a sense of security.

<Composition of each part>
Hereinafter, each member constituting the panty liner 1 will be described.

[Absorber]
The absorber 4 extends along the vertical direction X and is arranged between the colored second sheet 5 and the back surface sheet 3. The absorber 4 absorbs the body fluid from the side surface 4a of the skin and diffuses it inside to retain the body fluid. The absorber 4 is a member having the highest absorption capacity among the members constituting the panty liner 1.

The absorber 4 includes a fiber material such as pulp fiber and, if necessary, a fiber material containing particles of a highly absorbent polymer, a fiber material such as pulp fiber, and if necessary, a highly absorbent polymer. An absorbent paper containing the particles of the above can be used, such as an absorbent sheet in which particles of a highly absorbent polymer are arranged between two absorbent papers.
As the fiber material, wood pulp, natural fiber such as cotton and linen, polyolefin resin such as polyethylene and polypropylene, polyester resin such as polyethylene terephthalate, single fiber made of synthetic resin such as polyvinyl alcohol resin, and these resins are used. Composite fibers containing more than seeds, semi-synthetic fibers such as acetate and rayon can be used.
As the highly absorbent polymer, a polymer capable of absorbing and retaining a body fluid having a weight of 5 times or more of its own weight and capable of gelling is preferable. The shape is not particularly limited and may be spherical, lumpy, grape-like, powdery or fibrous. Examples of highly absorbent polymers include polyacrylic acid and its salts, as well as polyacrylic acid graft polymers, such as starch, crosslinked carboxylmethylated cellulose, acrylic acid or polymers of alkali metal salts of acrylic acid, or copolymers. be able to. As the polyacrylate, a sodium salt can be preferably used. Further, a copolymer such as maleic acid, itaconic acid, acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, 2- (meth) acryloylethanesulfonic acid, 2-hydroxyethyl (meth) acrylate or styrenesulfonic acid is added to the acrylic wire. A copolymer obtained by copolymerizing the highly absorbent polymer within a range that does not deteriorate the performance can also be preferably used.

As shown in FIG. 2, the absorber 4 is composed of, for example, a fiber material 41 and a highly absorbent polymer 42. In the panty liner 1, the absorber 4 is arranged in a folded state of the sheet-shaped absorbent sheet and has a laminated structure of two or more layers, but the absorbent body 4 may be a single-layer structure absorbent without folding. .. Further, the absorber 4 is formed by coating an absorbent core, which is an absorbent core on which a fiber material is stacked, or an absorbent core, which is a mixed fiber in which particles of a highly absorbent polymer are supported on the fiber, with a core wrap sheet. May be good.

In the panty liner 1, the front surface sheet 2, the colored second sheet 5, and the back surface sheet 3 have the same shape, and these overlap in a plan view to form the outer shape of the panty liner 1.
As shown in FIG. 1, in a plan view, the absorber 4 is located in the region where the front surface sheet 2, the colored second sheet 5, and the back surface sheet 3 are present. The absorber 4 is present over the entire longitudinal direction of the central portion C, and is also present in a part of the front portion F and the rear portion R.
The length of the absorber 4 in the vertical direction X is shorter than that of the front surface sheet 2, the colored second sheet 5 and the back surface sheet 3, and the length in the horizontal direction Y is the narrowest of the front surface sheet 2, the colored second sheet 5 and the back surface sheet 3. It is shorter than the width dimension. In a plan view, the front surface sheet 2, the colored second sheet 5, and the back surface sheet 3 extend outward from the entire peripheral edge of the absorber 4, and the extending areas thereof are joined to each other by an adhesive described later. .. Further, the extension areas are joined by a continuous peripheral joint portion 13 such as a heat seal located inward of the peripheral edge of the panty liner 1 over the entire circumference of the panty liner 1.
In the panty liner 1, the absorber 4 has a rectangular shape having a long side in the vertical direction X in a plan view. The planar shape of the absorber 4 is not limited.

The panty liner 1 has a squeezing groove such as a leak-proof lateral groove 6, a recessed portion 8, and a leak-proof vertical groove 7. The squeezing groove is formed by integrally recessing the surface sheet 2 and the colored second sheet 5. The squeezed groove has not reached the absorber 4, and the entire surface of the skin side surface 4a of the absorber 4 is in a non-squeezed state. The detailed configuration of the squeeze groove will be described later.
"Non-squeezed" includes the following forms as well as the forms that are not squeezed at all. By arranging the surface sheet 2 and the colored second sheet 5 having the squeezing groove in which the surface sheet 2 and the colored second sheet 5 are integrated on the absorber 4, the surface of the absorber 4 is slightly formed by the squeezing groove. A dent may occur. Such a form is also included in "non-squeezing". In such a form, the surface sheet, the colored second sheet, and the absorber are not integrated by the squeezing groove, and the absorber and the colored second sheet can be easily separated from each other.

Since the entire surface of the skin side surface 4a of the absorber 4 is in a non-squeezed state, the absorber 4 is effectively absorbed in the entire surface without causing a local liquid pool due to the compressed dense region. Noh can be used. Further, since the rigidity of the absorber 4 is prevented from being increased and the difference in rigidity due to the difference in the squeezed state is eliminated, the absorber 4 having good liquid absorption and flexibility can be obtained.
Further, when the absorber 4 contains the highly absorbent polymer 42, by putting the absorber 4 in a non-squeezed state, it is possible to prevent the highly absorbent polymer 42 contained in the absorber 4 from causing swelling inhibition due to the squeezing groove. The liquid absorption characteristics of the highly absorbent polymer 42 can be made effective.

[Surface sheet]
The surface sheet 2 is configured as a liquid-permeable sheet material, and is arranged above the colored second sheet 5 in the thickness direction Z.
The surface sheet 2 constitutes the outer shape of the panty liner 1.
As the surface sheet 2, those usually used in absorbent articles such as panty liners and menstrual napkins can be used without particular limitation.
The surface sheet 2 includes, for example, natural fibers such as cotton and linen, 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 two kinds of these resins. It is composed of composite fibers containing the above, semi-synthetic fibers such as acetate and rayon, and the like.

As shown in FIG. 1, the surface sheet 2 may have a plurality of openings 14. The opening 14 is a through hole that penetrates the surface sheet 2 in the thickness direction Z. In the example shown in FIG. 1, seven rows of opening portions 140 in which a plurality of openings 14 are arranged along the vertical direction X are intermittently arranged along the horizontal direction Y. The group of open holes composed of the plurality of rows of open holes 140 is arranged in the central portion of the surface sheet 2 in the lateral direction Y, and is not arranged on both sides. Further, the plurality of open hole rows 140 are arranged over the entire length of the panty liner 1 in the vertical direction X excluding both ends in the vertical direction. In plan view, the plurality of perforated rows 140 are located in the region surrounded by the peripheral joint 13, located inward of the peripheral joint 13 of the panty liner 1, and not outward. ..
The plurality of openings 14 are arranged in a staggered pattern, for example. The plan view shape of the opening 14 is not limited to the elliptical shape shown in FIG. 1, and may be, for example, a polygon such as a triangle, a square, or a rectangle, or a star shape. In the cross-sectional view of FIG. 2, the opening is not shown.

By providing the plurality of holes 140, the downward liquid transferability of the body fluid supplied to the surface sheet 2 is improved. By arranging a plurality of openings 140 along the vertical direction X to form the opening row, the panty liner has a longer dimension in the vertical direction X than the dimension in the horizontal direction Y even when the excretion rate of body fluid is high. In 1, the body fluid is easily diffused in the vertical direction X, and it is easy to prevent lateral leakage.
Further, the dimension of the opening portion row group consisting of a plurality of (7 rows in FIG. 1) opening portion rows 140 is shorter than the dimension of the lateral Y of the absorber 4, and is described later. It is shorter than the dimension of the lateral groove 6 in the lateral direction Y. The recessed portions 8, which will be described later, are arranged on both sides of the leak-proof lateral groove 6 on both sides in the lateral direction Y, and do not overlap with the open hole row 140 in a plan view. In the region 52 facing the excretion portion of the panty liner 1, the opening row 140 is located in the region where the absorber 4 is present in a plan view, so that the bodily fluid reaches the absorber 4 when the body fluid moves downward. Therefore, it is easy to suppress lateral leakage in the lateral direction Y.

The surface sheet 2 is configured so that when the panty liner 1 is viewed from the surface sheet 2 side, the colored second sheet 5, which will be described later, can be seen through. The surface sheet 2 is, for example, white. The color of the surface sheet 2 is not limited to white, and it is sufficient that the color of the colored second sheet 5 can be seen through when the panty liner 1 is viewed from the surface sheet 2 side.

On the skin side surface of the surface sheet 2, that is, the skin side surface 1a of the panty liner 1, a leak-proof lateral groove 6, a recessed portion 8, and a leak-proof vertical groove 7 formed by pressing from the surface sheet 2 side in the thickness direction Z, etc. A squeeze groove is formed. The squeezing groove will be described later.

[Colored second sheet]
The colored second sheet 5 is arranged between the surface sheet 2 and the absorber 4. The colored second sheet 5 promotes the attraction of body fluid from the surface sheet 2, improves the permeability of the body fluid to the absorber 4, reduces the return of the body fluid absorbed by the absorber 4 to the surface sheet 2, and the like. It is a sheet that plays the role of.
The colored second sheet 5 is made of a water-absorbent material. The water absorption can be evaluated by the Krem method described in "Paper and Paperboard-Water Absorption Test Method" of JIS P 8141. The Krem water absorption height of the colored second sheet 5 is preferably 1 mm or more higher than the Krem water absorption height of the surface sheet 2, and more preferably 5 mm or more. The Krem water absorption height of the surface sheet 2 is preferably 1 mm or more and 20 mm or less. The Krem water absorption height of the colored second sheet 5 is preferably 5 mm or more and 40 mm or less.
As the colored second sheet 5, a hydrophilic non-woven fabric or a hydrophilic fiber aggregate can be used. Examples of the non-woven fabric include air-through non-woven fabric, point-bonded non-woven fabric, resin-bonded non-woven fabric, spunlace non-woven fabric, air-laid non-woven fabric and the like. The colored second sheet 5 is formed by coloring a hydrophilic non-woven fabric or a hydrophilic fiber aggregate with, for example, a dye or the like.

The colored second sheet 5 is larger than the absorber 4 in a plan view and is positioned so as to cover the absorber 4. In the panty liner 1 of the present embodiment, the colored second sheet 5 has the same shape as the front surface sheet 2 and the back surface sheet 3, and is arranged on the entire surface of the panty liner 1. As a result, when the panty liner 1 is viewed in a plan view from the white surface sheet 2 side, the entire surface of the panty liner 1 is visually recognized by the color caused by the colored second sheet 5 via the surface sheet 2. By visually recognizing the entire surface in the same color in this way, a sense of unity is created in the product, and the wearer can be reminded that the color has a liquid hiding effect, which gives a sense of security. Further, by arranging the water-absorbent colored second sheet 5 on the entire surface of the panty liner 1, the feeling of stuffiness in the entire panty liner 1 when sweat or body fluid from the wearer at the time of wearing is supplied to the panty liner 1. It can be alleviated and the discomfort of wearing is reduced.

Here, "white" means a color having an L ^* value of 95 or more in the CIE-L ^* a ^* b ^* color system.
"Colored" means that in addition to excluding colorless and transparent, colors (white) having an L ^* value of 95 or more are also excluded. Further, in order to enhance the concealing property in the conventional absorbent article, for example, adding an agent such as titanium oxide to make it cloudy to make the L ^* value less than 95 is included in the colored concept of the present invention. I can't.
In the present specification, the L ^* value, a ^* value, and b ^* value in the CIE-L ^* a ^* b ^* color system can be measured by a color difference meter. For example, it can be obtained by measuring the reflected light of the sheet using a handy type spectrocolor difference meter NF333 (trade name) manufactured by Nippon Denshoku Kogyo Co., Ltd. under the measurement conditions of the light source C and the viewing angle of 2 °. At this time, it is preferable to use a white plate having an L ^* value of 95 or more as the background plate for measurement.

The color of the colored second sheet 5 is preferably a color that exerts a visual liquid hiding effect in the panty liner 1 to which the body fluid after wearing is supplied, in which the body fluid absorbed by the wearer is inconspicuous. For example, since the red color of menstrual blood is a warm color system, it is preferable to use a cool color system such as green, light blue, and purple, which contrasts with this. As a result, when menstrual blood adheres to the region where the colored second sheet 5 of the panty liner 1 is located in a plan view, the color of the menstrual blood can be difficult to see. This can reduce the visual discomfort given to the wearer.

The colored second sheet 5 may contain a functional agent capable of exerting a specific function such as an antibacterial agent or a deodorant. A colored second sheet containing a functional agent can be produced, for example, by blending the functional agent at the time of production thereof.
By using an antibacterial agent or a deodorant, it is possible to reduce the odor discomfort given to the wearer when wearing it, and it is not suitable for the wearer in combination with the visual discomfort reducing effect due to the coloring of the colored second sheet 5. It is hard to give a pleasant sensation.
Further, in the panty liner 1, by arranging the colored second sheet 5 containing the antibacterial agent and the deodorant on the skin side of the absorbent body 4 which is the liquid holding layer, the odor emitted from the body fluid held in the absorbent body 4 is emitted. It is easy to obtain the deodorant effect on the skin more effectively. As a result, the discomfort caused by the odor is reduced, and the discomfort given to the wearer can be further reduced in combination with the reduction of the visual and sensory discomfort.

Known antibacterial agents can be used. As the antibacterial agent, it is preferable to use an organic antibacterial agent. When the odor-generating substance in the excrement is organic, the organic antibacterial agent can be expected to have high antibacterial and deodorant properties due to its good affinity with the odor-generating substance. Organic cationic antibacterial agents are particularly preferred from the viewpoint of affinity with organic odor-causing substances and bacteria. Cationic antibacterial agents can suppress the generation of strong putrid odors as a control of malodor production. Therefore, in the present specification, the antibacterial agent is a concept included in the deodorant.
Cationic antibacterial agents are organic compound-based antibacterial agents that elute more into excrement such as urine than metal ion-based agents such as silver, zinc, and copper, and have a wide range of antibacterial effects. In particular, quaternary ammonium salts such as didecyldimethylammonium salt, alkylpyridinium salt, benzethonium salt, benzalconium salt, monoalkyltrimethylammonium salt and dialkyldimethylammonium salt are mentioned, and at least one selected from the group consisting of these. It is preferable to contain seeds. One of these cationic antibacterial agents may be used alone, or two or more thereof may be combined.

The deodorant itself is a substance that can directly act on the odor, that is, adsorb, neutralize, decompose, etc., and exert a deodorizing effect, and is also widely used in the technical field for deodorizing applications. Can be used. Porous deodorant granules are preferable because they have a wide deodorizing spectrum for odors. Examples of the porous deodorant granules include inorganic deodorant granules and organic deodorant granules. The inorganic deodorant granule is a deodorant granule mainly composed of an inorganic compound, that is, a deodorant granule in which the compound serving as the skeleton of the deodorant granule is an inorganic compound. The organic deodorant granule is a deodorant granule mainly composed of an organic compound, that is, a deodorant granule in which the compound serving as the skeleton of the deodorant granule is an organic compound.
As described above, by using a deodorant in addition to the antibacterial agent, the generation of bad odor can be further suppressed.
Preferred inorganic deodorant granules include canclinite-like minerals, zeolites, montmorillonite, activated carbon and the like. Among these, the porous deodorant granules having polarity are preferable because they are suitable for deodorizing water-soluble odor-causing substances, and further, the canclinite-like mineral and zeolite have a wide deodorizing spectrum. preferable. Since activated carbon belongs to non-polarity, it is effective in deodorizing organic odorous components, and examples thereof include coconut shell charcoal, charcoal, calendar blue charcoal, peat, and lignite.
Preferred organic deodorant particles include particles obtained by copolymerizing a monomer component containing a crosslinkable vinyl monomer and a vinyl monomer having a heteroaromatic ring.

[Back sheet]
The back surface sheet 3 is arranged below Z in the thickness direction of the absorber 4. The non-skin side surface of the back sheet 3 constitutes the non-skin side surface 1b of the panty liner 1.
The back sheet 3 constitutes the outer shape of the panty liner 1.
As the back sheet 3, those usually used in absorbent articles such as panty liners and menstrual napkins can be used without particular limitation.
The back surface 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, a laminate of the film and a non-woven fabric, or the like can be used.
Although not shown, the non-skin side surface of the back sheet 3 is provided with an adhesive portion for fixing the panty liner 1 to the clothes.

[Squeezing groove]
As described above, the skin side surface of the surface sheet 2, that is, the skin side surface 1a of the panty liner 1, is formed by pressing from the surface sheet 2 side in the thickness direction Z, so that the leakage-proof lateral groove 6 and the recessed portion 8 are formed. A squeeze groove such as a leak-proof flute 7 is formed (see FIGS. 1 and 2). The squeezing groove can be formed according to a conventional method by squeezing with or without heat, or by embossing such as ultrasonic embossing.

As shown in FIG. 2, the surface sheet 2 and the colored second sheet 5 of the squeezing groove such as the leak-proof lateral groove 6, the recessed portion 8, or the leak-proof vertical groove 7, which is not shown in FIG. 2, are the panty liner 1. It has a recessed structure formed by being integrally squeezed toward the non-skin side surface 1b (back surface sheet 3 side). The squeeze groove has not reached the absorber 4.

In the panty liner 1, the squeezing grooves such as the leak-proof horizontal groove 6, the recessed portion 8, and the leak-proof vertical groove 7 do not reach the absorber 4 in the thickness direction Z, so that the surface sheet, the colored second sheet, and the absorber are used. Compared with the squeezed groove formed by being integrally squeezed (hereinafter, may be referred to as “squeezed groove reaching the absorber”), the fiber density is low and the rigidity is also low. For this reason, in the squeezed grooves such as the leak-proof lateral groove 6, the recessed portion 8, and the leak-proof vertical groove 7 in the panty liner 1, the color of menstrual blood and the like tends to be darker than that of other unsqueezed regions, but the absorber Compared to the squeezed groove that has reached up to, the color of the body fluid is less noticeable, and it is less likely to cause visual discomfort to the wearer.

Next, each squeezing groove will be described.
(Leakage-proof lateral groove)
As shown in FIG. 1, in a plan view, the leak-proof lateral grooves 6 are arranged in pairs in the front-rear direction in the excretion portion facing region 52 of the panty liner 1.
Of the pair of front and rear leak-proof lateral grooves 6, the leak-proof lateral groove located in the front is referred to as a front leak-proof lateral groove 6a, and the leak-proof lateral groove located in the rear is referred to as a rear leak-proof lateral groove 6b. When the two are not particularly distinguished, it is referred to as a leak-proof lateral groove 6.

The anterior leakage-proof lateral groove 6a has a convex shape extending along the lateral direction Y and projecting forward. In the example shown in FIG. 1, the front leakage-proof lateral groove 6a has a gentle arc shape that is convex outward in the vertical direction X of the panty liner 1, but is not limited thereto. For example, it may have an inverted V shape, or may be a convex shape protruding forward. The front leakage-proof lateral groove 6a is located in the front portion F.
The rear leakage-proof lateral groove 6b has a convex shape extending along the lateral direction Y and projecting rearward. In the example shown in FIG. 1, the rear leakage-proof lateral groove 6b has a gentle arc shape that is convex outward in the vertical direction X of the panty liner 1, but is not limited thereto. For example, it may be V-shaped, or it may be a convex shape protruding rearward. The rear leakage-proof lateral groove 6b is located in the rear portion R.

The leak-proof lateral groove 6 has a linear shape in which a plurality of recessed squeezing portions 60 are intermittently arranged to form a row and can be regarded as a continuous line as a whole. In the present embodiment, the plurality of recessed squeezing portions 60 have different planar shapes from each other, and the leak-proof lateral groove 6 has the largest width in the central region in the length direction of the leak-proof lateral groove 6 as a whole, and its end thereof. The shape is such that the width gradually decreases toward the part.
The "continuous" linear shape in the leak-proof lateral groove 6 means a form in which a leak-proof lateral groove is formed by a continuous linear concave depression pressing portion, and a row of a plurality of discontinuous concave depression pressing portions as in the present embodiment. A leak-proof lateral groove is formed by the aggregates formed, and includes a form that can be regarded as a continuous line as a whole. The leak-proof lateral groove 6 may be composed of one continuous linear concave depression squeezing portion. In FIGS. 4 and 7, the shape of the leak-proof lateral groove 6 is simplified and illustrated in an arc shape formed by a continuous linear shape.
The “linear” in the leak-proof lateral groove 6 is not limited to the linear aspect in the plan view of the leak-proof lateral groove, and includes a curved form.
The phrase "extending in the lateral direction Y" is not limited to a mode completely parallel to the lateral direction Y, and may extend from the right side to the left side. Similarly, "extending in the vertical direction X" is not limited to a mode completely parallel to the vertical direction X, and may extend from the front to the rear.

Since the leakage-proof lateral groove 6 has a higher fiber density than the surrounding unsqueezed region, the body fluid excreted by the capillary action can be absorbed and retained. The pair of front and rear leak-proof lateral grooves 6 have a leak-proofing action of suppressing the diffusion of body fluid in the vertical direction X in the panty liner 1 and preventing the liquid from leaking outward in the vertical direction X.

The tip of the convex portion of the front leak-proof lateral groove 6a and the convex tip of the rear leak-proof lateral groove 6b are located in the absorber 4. That is, the pair of front and rear leak-proof lateral grooves 6 are located in the region where the absorber 4 is located in a plan view, and by extension, are located in the region where the colored second sheet 5 arranged so as to cover the absorber 4 is located. is doing.

The pair of front and rear leak-proof lateral grooves 6 are more likely to collect liquid than the surrounding unsqueezed region, but the leak-proof lateral grooves 6 have a shape that does not reach the absorber 4 in the thickness direction Z, so that they can be absorbed. Compared to the leak-proof groove that reaches the body, the fiber density is low, liquid pools are unlikely to occur, and the rigidity is low. As a result, the flexibility of the panty liner 1 is improved and it is difficult to give a feeling of discomfort when wearing it, and the color of the body fluid due to the liquid pool in the leak-proof lateral groove 6 can be made inconspicuous. Further, since the pair of front and rear leak-proof lateral grooves 6 are located in the colored second sheet 5 in a plan view, the color of the body fluid due to the liquid pool is less noticeable.

The pair of leak-proof lateral grooves 6 are positioned so as to substantially surround the absorber 4 in the front-rear direction. Since the pair of front and rear leak-proof horizontal grooves 6 each have a convex shape toward the outside of the panty liner 1 in the vertical direction X, even when the body fluid diffuses in the vertical direction X and reaches the leak-proof horizontal groove 6. The leak-proof lateral groove 6 dams the body fluid and allows it to be returned inward in the vertical direction X while being diffused in the lateral direction Y, so that the body fluid can be easily concentrated in the central portion of the panty liner 1. Since the pair of leak-proof lateral grooves 6 are located on the absorber 4 in a plan view, the liquid diffusion range in the vertical direction X can be easily contained in the absorber 4 which is the liquid holding layer, and the liquid absorption of the panty liner 1 can be easily contained. The sex can be good.

Moreover, in the panty liner 1, since the absorber 4 has a higher absorption capacity than the colored second sheet 5, liquid transfer to the absorber 4 is promoted even if the squeezed groove including the leak-proof lateral groove does not reach the absorber. Will be done.
That is, the surface sheet 2 and the colored second sheet 5 are integrally recessed, and the body fluid from the wearer supplied to the surface sheet 2 is promoted to be transferred to the colored second sheet 5. The absorber 4 is a member having the largest absorption capacity among the members constituting the panty liner 1, and the body fluid from the colored second sheet 5 to the absorber 4 is determined by the absorption capacity gradient between the absorber 4 and the colored second sheet 5. Transition is facilitated. Therefore, the liquid transfer to the absorber 4 is efficiently performed, and the liquid absorption property of the panty liner 1 can be improved.

In this way, the body fluid from the wearer is mainly held by the absorber 4, and the colored second sheet 5 is arranged above the absorber 4 so as to cover the absorber 4. When the wearer looks at the panty liner 1 from the surface sheet 2 side, the colored second sheet 5 is located in front of the absorber 4 in which the body fluid is mainly held, which makes it difficult to visually recognize the presence of the body fluid. Discomfort can be reduced.

The positional relationship between the pair of front and rear leak-proof horizontal grooves 6, the first virtual line 21, the second virtual line 22, the first individual fold line 31, and the second individual fold line 32 will be described later.

(Leakage-proof flute)
As shown in FIG. 1, in a plan view, the leak-proof flutes 7 are arranged in pairs on the left and right at the center of the vertical direction X in the excretion portion facing region 52 of the panty liner 1. The pair of left and right leak-proof vertical grooves 7 extend continuously in the vertical direction X, respectively. The pair of left and right leak-proof flutes 7 each have a gentle arc shape that is convex toward the lateral Y outward of the panty liner 1.
The leak-proof vertical groove 7 is located laterally outward from the left and right side edges of the absorber 4 along the vertical direction X. The leak-proof flute 7 has the largest width in the central region in the length direction thereof, and the width gradually decreases toward the end thereof.

Since the pair of left and right leak-proof flutes 7 have a higher fiber density than the surrounding area, the body fluid excreted by the capillary action can be absorbed and retained. As a result, the pair of left and right leak-proof flutes 7 also have a leak-proof action to prevent leakage (lateral leakage) of body fluid to the lateral Y outward of the absorber 4. In the present embodiment, the pair of left and right leak-proof flutes 7 each have a gentle arc shape that is convex outward in the lateral direction Y of the panty liner 1, so that the body fluid diffuses in the lateral direction Y. Even when the leak-proof flute 7 is reached, the body fluid can be dammed by the leak-proof flute 7 and diffused in the vertical direction X while being returned inward in the horizontal direction Y. As a result, lateral leakage in the central portion C is further suppressed.

The pair of left and right leak-proof flutes 7 have higher rigidity than other unsqueezed regions and are less likely to be deformed. Therefore, when the panty liner 1 is worn, when the panty liner 1 receives an external force from the lateral direction Y, the pair of left and right leakage-proof flutes 7 are opposed to a deformation starting point that promotes deformation of the surrounding low-rigidity region and an external force. It can function as a part that exerts resistance. As a result, in the central portion C, the external force transmitted to the absorber 4 is weakened, the occurrence of unfavorable deformation of the absorber 4 such as kinking is suppressed, and the absorption performance of the panty liner 1 can be kept good.

The pair of left and right leak-proof flutes 7 are formed in an arc shape so as to substantially follow the shape of the convex portions 15 on the left and right side edges in the central portion C of the panty liner 1. In this way, by making the convex direction of the convex shape portions 15 on the left and right side edges of the central portion C of the panty liner 1 the same as the convex direction of the pair of arcuate left and right leak-proof vertical grooves 7, the leak-proof vertical groove The shape retention of 7 is improved. Even when an external force from the lateral direction Y is applied to the panty liner 1 when worn, the shape of the leak-proof flute 7 does not easily collapse, and the leak-proof effect can be effectively exhibited. Further, by forming the leak-proof flute 7 so as to substantially follow the shape of the convex portion 15, the deformation of the central portion C due to the external force applied from the wearer during wearing is caused by the shape of the pair of left and right leak-proof flutes 7. Since it is blocked by the resistance force generated due to the above, the central portion C is less likely to be twisted.

(Recessed part)
As shown in FIG. 1, in a plan view, the recessed portion 8 is provided on each of the left and right sides of the front leak-proof lateral groove 6a located in the front portion F, and on the left and right sides of the rear leak-proof lateral groove 6b located in the rear portion R. One is provided for each. Each of the pair of left and right concave portions located in the front portion F is referred to as a front concave portion 8a. Each of the pair of left and right concave portions located in the rear portion R is referred to as a rear concave portion 8b. When it is not necessary to distinguish between the two, it is referred to as a recessed portion 8.

Each of the pair of left and right front recessed portions 8a is located in contact with the left and right side portions 44a and 44b (left side portion 44a and right side portion 44b) of the front end region 43a of the absorber 4.
Each of the pair of left and right rear recessed portions 8b is located so that at least a part of each of the left and right side portions 44a and 44b of the rear end region 43b of the absorber 4 is in contact with each other.
In other words, in the present embodiment, the absorber 4 has a rectangular planar shape, and each of the four corners of the absorber 4 is in contact with each of the four recessed portions 8 at least in part. Each of the four corners of the absorber 4 and each of the four recessed portions 8 are positioned so as to overlap each other in a plan view.
By locating each of the four recessed portions 8 extending in the vertical direction X in contact with each of the four corners of the absorber 4, it is possible to further suppress the diffusion of body fluid in the lateral direction Y and prevent lateral leakage. be able to.

Each recess 8a has a shape that extends continuously in the vertical direction X. Each recess 8 has an arc shape that is convex toward the inside of the panty liner 1 in the lateral direction Y.

<Positional relationship between leak-proof lateral groove, 1st and 2nd virtual lines, 1st and 2nd individual folding lines>
In the panty liner 1, the pair of front and rear leakage-proof lateral grooves 6 do not straddle the first virtual line 21 and the second virtual line 22 in a plan view.
In the "non-straddling" form, in addition to the form in which the first and second virtual lines and the leak-proof lateral groove 6 do not overlap at all in a plan view, the first and second virtual lines 21 and 22 and the leak-proof lateral groove 6 are points. The form of contact is also included. For example, in a plan view, a form in which the tip of the convex portion of the leak-proof lateral groove 6 and the virtual line 21 or 22 are in contact with each other at one point, or a form in which both ends of the linear leak-proof lateral groove 6 are in contact with the virtual line 21 or 22. That is, a form in which two points are in contact with each other is also included.

The first constriction portion 11 and the second constriction portion 12 buffer the stress propagated in the vertical direction X through the side edges of the panty liner 1 and reduce its influence, and the panty liner 1 is twisted. Has a function of suppressing. Therefore, the positions of the first virtual line 21 and the second virtual line 22 are more susceptible to stress and are more likely to be deformed than the other regions before and after the first virtual line 21.
In the panty liner 1, the leak-proof lateral groove 6 is arranged so as not to straddle the first virtual line 21 and the second virtual line 22 which are susceptible to this stress, so that the shape of the leak-proof lateral groove 6 is hard to collapse and is prevented. The shape retention of the leakage lateral groove 6 can be improved. As a result, it is possible to improve the flexibility of the panty liner 1 and improve the shape retention of the leak-proof lateral groove 6 by forming the squeezing groove that does not reach the absorber, and the leak-proof lateral groove 6 can be prevented from leaking. The function can be efficiently expressed.

In addition, in the panty liner 1, the leakage-proof lateral groove 6 is arranged so as not to straddle the first individual folding line 31 and the second individual folding line 32. As a result, deformation of the leak-proof lateral groove 6 due to the individual packaging fold lines 31 and 32 is suppressed, the shape-retaining property of the leak-proof lateral groove 6 is further improved, and the leak-proof lateral groove 6 is already unintentionally collapsed when the individual packaging is opened. It is prevented from being there. Therefore, when worn, the leak-proof function of the leak-proof lateral groove 6 can be efficiently exhibited in the panty liner 1.
The "non-straddling" form includes a form in which the first individual folding line 31 and the second individual folding line 32 and the leakage-proof lateral groove 6 do not overlap at all, as well as the individual folding line 31 or 32. A form in which the leak-proof lateral groove 6 is in contact with a point is also included. For example, in a plan view, the tip of the convex portion of the leak-proof lateral groove 6 and the individual fold line 31 or 32 are in contact with each other at one point, or both ends of the linear leak-proof lateral groove 6 and the individual fold line 31 or 32. A form in which is in contact with each other, that is, a form in which two points are in contact with each other is also included.

As described above, in the panty liner 1, the leakage-proof lateral groove 6 is not located across any of the first and second folding lines 31 and 32 and the first and second virtual lines 21 and 22. The shape retention of the leak-proof lateral groove 6 is improved. As a result, the leak-proof function can be efficiently exhibited, and the presence of the highly rigid leak-proof lateral groove 6 suppresses the deformation of the panty liner 1 and maintains good liquid absorption characteristics.

Further, in the panty liner 10 in an individually packaged state in which the panty liner 1 is folded in three in the vertical direction, at least one of the pair of front and rear leak-proof lateral grooves 6 is at least one of the first virtual line 21 and the second virtual line 22. It is located between one side and the individual fold line. As shown in FIG. 1, in the panty liner 10 in the individually wrapped state by folding in three, the front leakage-proof lateral groove 6a is located between the first virtual line 21 and the first individual folding line 31. The rear leakage-proof lateral groove 6b is located outside the rear region 53 side in the vertical direction X of the second virtual line 22 and the second individual folding line 32. Further, in the panty liner 10 in the individually wrapped state, the front leak-proof lateral groove 6a and the rear leak-proof lateral groove 6b do not overlap each other in a plan view. If the front leak-proof lateral groove 6a and the rear leak-proof lateral groove 6b are individually packaged so as to overlap each other in a plan view, a force is applied in the lateral direction Y at the position where the leak-proof lateral groove exists in the panty liner 10 in the individually packaged state. When added, any of the pair of leak-proof lateral grooves 6 may lose its shape. On the other hand, by setting the front leak-proof lateral groove 6a and the rear leak-proof lateral groove 6b into an individually packaged state in which they do not overlap each other in a plan view, the possibility that both shapes of the pair of leak-proof lateral grooves 6 are distorted is reduced. be able to.
By setting the individual packaging state as described above, the shape of the leak-proof lateral groove 6 can be made more difficult to collapse, and the leak-proof lateral groove 6 is already unintentionally collapsed when the individual package is opened. Can be prevented.

As shown in FIG. 1, the anterior leakage-proof lateral groove 6a is located in the excretion portion facing region 52 and is located in the region where the absorber 4 is located. The front leak-proof lateral groove 6a is located in the region between the first individual folding line 31 and the first virtual line 21. The front leakage-proof lateral groove 6a is located in the vicinity of the first individual folding line 31.
The first individual folding line 31 is at the same position as the virtual horizontal line 34 extending in parallel with the lateral direction Y passing through the front tip portion of the absorber 4. The first individual folding line 31 is located at the boundary between the region where the absorber 4 is located and the region where the absorber 4 is not located in the panty liner 1.

On the other hand, the rear leakage-proof lateral groove 6b is located in the area facing the excretion portion 52, and is located in the area where the absorber 4 is located. The rear leakage-proof lateral groove 6b is located outside the vertical direction X with respect to the second folding line 32. The rear leakage-proof lateral groove 6b is located in the vicinity of the second folding line 32. The second folding line 32 is at the same position as the second virtual line 22.

When a force is applied laterally Y inward from both legs of the wearer to the intermediate portion C located in the excretion portion facing region 52 of the panty liner 1, the pair of first constricted portions 11 and the pair of second constricted portions 11 The constricted portion 12 serves as a twist relaxation starting point, and wrinkles are likely to occur in the front portion F and the rear portion R so as to extend in the vertical direction X from the first virtual line 21 and the second virtual line 22. The front leak-proof lateral groove 6a and the rear leak-proof lateral groove 6b may be twisted as starting points.
However, in the panty liner 1 of the present embodiment, as shown in FIG. 1, the front leakage-proof lateral groove 6a is in the vertical direction from the position 36 having the same width as the maximum width portion a of the excretion portion facing region 52 in the front region 51. It is located inside X (on the side facing the excretion portion) and outside the vertical direction X (on the front end side of the vertical direction X) with respect to the first virtual line 21. As described above, by arranging the front leakage-proof lateral groove 6a on the absorber 4 in the region where the wrinkles are likely to occur, it is easy to prevent the front leakage-proof lateral groove 6a from being twisted and deformed due to the wrinkles when worn. Become.
The same applies to the rear leakage-proof lateral groove 6b. The rear leakage-proof lateral groove 6b is located inward in the vertical direction X (on the side of the excretion portion facing region) from the position 37 having the same width as the maximum width portion a of the excretion portion facing region 52 in the rear region 53, and is a second virtual line. It is located outside the vertical direction X (on the front end side of the vertical direction X) with respect to 22. As described above, by arranging the rear leakage-proof lateral groove 6b on the absorber 4 in the region where the wrinkles are likely to occur, it is easy to prevent the rear leakage-proof lateral groove 6b from being twisted and deformed due to the wrinkles when worn. Become.

As described above, in the panty liner 1, the leak-proof lateral groove 6 that does not reach the absorber 4, the colored second sheet 5 that covers the absorber 4, and the absorption capacity gradient between the colored second sheet and the absorber make it possible to visually conceal the liquid. The shape retention of the leak-proof lateral groove 6 is improved by providing the leak-proof lateral groove 6 so as not to straddle the virtual line connecting the pair of constricted portions and the individual folding line, and the occurrence of unfavorable deformation such as twisting occurs. It can be effectively suppressed. This makes it possible to reduce the visual discomfort and the perceived discomfort given to the wearer.

<Positional relationship between recessed part, 1st and 2nd virtual lines, 1st and 2nd individual folding lines>
Each recess 8 has an arcuate shape that extends continuously in the vertical direction X and is convex inward in the lateral direction Y of the panty liner 1.

The front recessed portion 8a is located between the first individual folding line 31 and the first virtual line 21 in a plan view. Neither the virtual line nor the individual folding line is located straddling the front recessed portion 8a, and the shape of the front recessed portion 8a is not easily deformed like the leak-proof lateral groove 6.
In the panty liner 1, one end of each of the pair of front recessed portions 8a is located on or near the first virtual line 21, and in the example shown in FIG. 1, they are located near each other. The other ends of each of the pair of front concave portions 8a are located on or near the first individual folding line 31, and in the example shown in FIG. 1, they are located on the first individual folding line 31. .. One end of the front recessed portion 8a is located in the vicinity of the first constricted portion 11. By locating the front recessed portion 8a having high rigidity in the vicinity of the first constricted portion 11, it is easy to suppress the twisting of the side edge of the panty liner 1 in the vicinity of the first constricted portion 11.

The rear recessed portion 8b is a virtual horizontal line 35 extending in parallel with the lateral direction Y passing through the rear tip portion of the absorber 4, and the second folding line 32 and the second virtual line at the same positions as each other. It is located between 22 and. The rear recessed portion 8b is not located straddling either the individual folding line or the virtual line, and like the leak-proof lateral groove 6, the shape of the rear recessed portion 8b is not easily deformed.
In the panty liner 1, one end of each of the pair of rear recessed portions 8b is located on or near the second virtual line 22, and in the example shown in FIG. 1, they are located near each other. The other ends of each of the pair of rear recessed portions 8b are located on or near the virtual horizontal line 35, and in the example shown in FIG. 1, they are located on the virtual horizontal line 35. One end of the rear recessed portion 8b is located in the vicinity of the second constricted portion 12. By locating the rear recessed portion 8b having high rigidity in the vicinity of the second constricted portion 12, it is easy to suppress the twisting of the side edge of the panty liner 1 in the vicinity of the second constricted portion 12.

Since the pair of front recessed portions 8a are arranged on both sides in the lateral direction Y with the front leak-proof lateral groove 6a sandwiched between them, when an external force toward the lateral direction Y inward is applied to the panty liner 1, the front recessed portions 8a Due to the presence, the force exerted on the front leak-proof lateral groove 6a can be reduced, and the shape retention of the front leak-proof lateral groove 6a is improved. Further, as described above, since the pair of front recessed portions 8a are configured so that their shapes do not easily collapse, the shape retention of the front leakage-proof lateral groove 6a can be further improved. The same can be said for the rear recessed portion 8b.

<Adhesive>
In the panty liner 1, the surface sheet 2 and the colored second sheet 5 are joined by a first adhesive S1 arranged between them.
The colored second sheet 5 and the absorber 4 are joined by a second adhesive S2 arranged between them.
The absorber 4 and the back surface sheet 3, and the back surface sheet 3 and the colored second sheet 5 are bonded by a third adhesive S3 arranged between them, respectively.
In the absorber 4 having a laminated structure, the plurality of layers are joined by a fourth adhesive S4 arranged between them. This improves the shape retention of the absorber 4.
Each adhesive will be described below.

[First Adhesive S1]
As shown in FIG. 3, the coating region 71 of the first adhesive S1 arranged between the surface sheet 2 and the colored second sheet 5 is formed over the entire surface of the surface sheet 2 and the colored second sheet. In other words, the first adhesive S1 covers the interface between the surface sheet 2 and the colored second sheet 5 on the entire surface.

The coating pattern of the first adhesive S1 is an intermittent coating pattern in which a coated portion 76 coated with the first adhesive S1 and a non-coated portion 77 not coated are mixed. The coated region 71 of the first adhesive S1 means a region in the range where the first adhesive S1 exists, and the non-coated portion 77 may be included, and hereinafter, the second adhesive S2, The same applies to the third adhesive S3 and the fourth adhesive S4.
By applying the first adhesive S1 in an intermittent coating pattern, the flexibility at the interface between the surface sheet 2 and the colored second sheet 5 is enhanced, and the occurrence of liquid flow inhibition due to the adhesive is suppressed, so that the absorber is absorbed. It is possible to obtain a panty liner 1 having good liquid absorbency, in which body fluid is effectively transferred to 4.
Examples of the intermittent coating pattern include a spiral shape, a summit shape, an omega shape, a striped shape, and the like. Hereinafter, the same intermittent coating is applied to the second adhesive S2, the third adhesive S3, and the fourth adhesive S4. Patterns can be used.

It is preferable to use a hydrophobic adhesive as the first adhesive S1. As a result, the body fluid is less likely to remain on the surface sheet 2, and the visual liquid hiding property is further improved. Further, since the first adhesive S1 is formed on the entire surface and the surface sheet 2 does not easily float from the colored second sheet 5, the body liquid absorbed by the surface sheet 2 easily moves to the colored second sheet 5, and is hydrophobic. Combined with the suppression of the liquid remaining on the surface sheet 2 by using the adhesive, the liquid transferability to the colored second sheet 5 can be improved. Further, since the first adhesive S1 is formed on the entire surface, the colored second sheet 5 is easily deformed following the deformation of the surface sheet 2 that comes into contact with the wearer's skin when worn, and the surface sheet 2 and the colored second sheet are easily deformed. Twisting at the interface of the sheet 5 is suppressed, and it is possible to reduce the perceived discomfort when wearing the sheet 5.
For the first adhesive S1 as the first hydrophobic adhesive, for example, SBS-based, SEBS-based, olefin-based hot melt and the like can be used.

[Second Adhesive S2]
As shown in FIG. 4, the coating region 72 of the second adhesive S2 arranged between the colored second sheet 5 and the absorber 4 is a region where the colored second sheet 5 and the absorber 4 overlap in a plan view. Located in a part. In other words, the second adhesive S2 covers the interface between the colored second sheet 5 and the absorber 4 on a non-whole surface. Further, the second adhesive S2 is located between the pair of front and rear leak-proof lateral grooves 6 in a plan view, and is not positioned so as to overlap with the leak-proof lateral grooves 6. In the example shown in the figure, the coating region 72 of the second adhesive S2 has a strip shape extending in the vertical direction X at the vertical X center portion of the horizontal Y central portion of the absorber 4.

The coated area 72 of the second adhesive S2 is partially in the plane, but the presence of the surface sheet 2 above the colored second sheet 5 makes the colored second sheet 5 difficult to float from the absorber 4 as a whole. It has become. Further, as described above, since the absorber 4 is composed of the member having the highest absorption capacity among the members constituting the panty liner 1, the liquid flows from the colored second sheet 5 to the absorber 4 depending on the gradient of the absorption capacity. It is in a state where it is easy to migrate.
In this way, by partially applying the second adhesive S2, the occurrence of liquid flow inhibition due to the adhesive is suppressed. Further, the colored second sheet 5 is in a state where it is difficult to float from the absorber 4, and the colored second sheet 5 and the absorber 4 arranged adjacent to each other have a gradient in absorption capacity, so that the colored second sheet 5 is not easily lifted. The panty liner 1 has good liquid transferability to the absorber 4 and has good liquid absorption.

Similar to the first adhesive S1, the coating pattern of the second adhesive S2 is a mixture of the coated portion 76 to which the second adhesive S2 is coated and the uncoated portion 77 which is not coated. It is an intermittent coating pattern. By adopting the intermittent coating pattern, the flexibility of the interface between the colored second sheet 5 and the absorber 4 can be enhanced, the occurrence of liquid flow inhibition due to the adhesive can be suppressed, and the liquid passage property can be improved.

It is preferable to use a hydrophobic adhesive as the second adhesive S2. As a result, the body fluid is less likely to remain on the colored second sheet 5, and the liquid absorption property is improved by partially providing the above-mentioned second adhesive S2 in the plane, and the absorption capacity between the colored second sheet 5 and the absorber 4 is increased. Coupled with the improvement of the liquid transferability by providing the gradient, it is possible to make the body fluid more easily transferred to the absorber 4. As a result, most of the colored body fluids such as blood are retained by the absorber 4. Therefore, when the wearer looks at the panty liner 1 from the surface sheet 2 side, the colored second sheet 5 is located in front of the absorber 4 in which the body fluid is mainly held, and it becomes difficult to visually recognize the presence of the body fluid. , The visual liquid concealment is improved.
As the second adhesive S2 as the second hydrophobic adhesive, for example, SBS-based, SEBS-based, olefin-based hot melt and the like can be used.

Further, since the second adhesive S2 is arranged not on the entire surface but on the central portion of the absorber 4 in the lateral direction Y, both side portions of the absorber 4 in the lateral direction Y are not fixed by the adhesive, and the adhesive is used. It has lower rigidity than the area where it is arranged, and it can move flexibly even though it is a minute movement. As a result, when the panty liner 1 is worn, it is difficult to feel the hardness due to the rigidity of the absorber 4, and it is possible to make it difficult for the wearer to feel a sense of discomfort.
Here, for example, when the second adhesive S2 is arranged on the entire surface of the absorber in a plan view, the difference in rigidity between the region where the absorber 4 is located in the plan view and the region where the absorber 4 is not located in the panty liner becomes large. ..
On the other hand, in the present embodiment, since the second adhesive S2 is arranged in a part of the region where the absorber 4 is located in the plan view, the second adhesive S2 is arranged in the panty liner 1 in the region where the absorber 4 is located in the plan view. The difference in rigidity between the region where the adhesive S2 is arranged and the region where the adhesive S2 is not arranged, and the difference in rigidity between the region where the absorber 4 is located and the second adhesive S2 is not arranged and the region where the absorber 4 is not located in a plan view. The difference in rigidity when the above-mentioned second adhesive S2 is arranged on the entire surface of the absorber in a plan view can be made smaller. The larger the difference in rigidity, the more likely it is that the wearer feels uncomfortable. However, it is possible to make it difficult to give a feeling of discomfort when wearing it, and it is possible to reduce the feeling of discomfort.

The second adhesive S2 arranged between the colored second sheet 5 and the absorber 4 is not located so as to overlap the leakage-proof lateral groove 6 in a plan view.
Therefore, the interface between the absorber 4 and the colored second sheet 5 located directly below the leak-proof lateral groove 6 is in a state where the absorber 4 and the colored second sheet 5 are not fixed and can move flexibly. As a result, the occurrence of so-called liquid return, in which the body fluid once absorbed by the absorber 4 returns to the surface sheet 2 side due to pressure from the wearer or the like when worn, is suppressed.
Therefore, the liquid retention property in the absorber 4 is improved, and the color of the body fluid held by the absorber 4 can be effectively shielded by the colored second sheet 5 arranged on the absorber 4, and the liquid hiding property can be obtained. Can be improved and visual discomfort can be further reduced.
Further, when the absorbent body having high rigidity is twisted, the absorbent body 4 is not fixed to the colored second sheet 5 directly under the leakage-proof lateral groove 6, so that the colored second sheet 5 does not easily follow the deformation of the absorbent body 4 and is the original. It is easy to exert the restoring force to return to the state of. Therefore, even if the absorber is twisted, the surface sheet 2 which follows the absorber and is integrated with the colored second sheet 5 by the leakage-proof lateral groove 6 is less likely to be twisted.

Further, since the second adhesive S2 is not arranged directly under the leak-proof lateral groove 6 where the liquid easily collects, the liquid transfer from the colored second sheet 5 to the absorber 4 is not hindered, and the color of the body fluid is generally darkened by the liquid pool. Improves liquid concealment in easy-to-see leak-proof grooves.

Further, the second adhesive S2 is partially arranged instead of the entire surface of the absorber 4, and the absorber 4 is a colored second sheet at the interface with the colored second sheet 5 in addition to directly under the leakage-proof lateral groove 6. It has a portion that is non-fixed to 5 and is in a state of being able to move flexibly. As a result, even in the region where the leak-proof lateral groove 6 where the liquid pool is likely to occur is not located, the occurrence of liquid return is suppressed, the liquid is easily held by the absorber 4, and the liquid concealment property can be improved.

[Third Adhesive S3]
As shown in FIG. 5, the coating area 73 of the third adhesive S3 arranged between the absorber 4 and the back surface sheet 3 and between the colored second sheet 5 and the back surface sheet 3 covers the entire surface of the back surface sheet 3. Is formed. In FIG. 5, the shaded first region 61 is a region in the panty liner 1 where the absorber 4 and the back surface sheet 3 overlap in a plan view. In the panty liner 1, the second region 62, which is a region other than the first region 61, is a region where the absorber 4 is not located.
In the first region 61, the absorber 4 and the back surface sheet 3 are joined by the third adhesive S3. In the second region 62, the colored second sheet 5 and the back surface sheet 3 are joined by the third adhesive S3. That is, the third adhesive S3 covers the interface between the absorber 4 and the back surface sheet 3 on the entire surface in the first region 61, and covers the interface between the colored second sheet 5 and the back surface sheet 3 on the entire surface in the second region 62. There is.

The coating pattern of the third adhesive S3 is an intermittent coating pattern in which a coated portion 76 coated with the third adhesive S3 and a non-coated portion 77 not coated are mixed. By applying the third adhesive S3 in an intermittent coating pattern, flexibility is achieved at the interface between the absorber 4 and the back surface sheet 3 in the first region 61 and at the interface between the colored second sheet 5 and the back surface sheet 3 in the second region 62. It can enhance the sex.
The third adhesive S3 is not particularly limited, and those usually used for the adhesive can be used.

As shown in FIG. 5, the second region 62 is located so as to surround the entire circumference of the first region 61, and can be said to be a peripheral portion of the absorber 4. In the second region 62, the third adhesive S3 is a fixing material for fixing the back surface sheet 3 and the colored second sheet 5, and the fixing material is located around the absorber 4. In the second region 62, the third adhesive S3 defines the region where the absorber 4 is located inside the panty liner 1.
Since the peripheral portion of the absorber 4 is fixed by the third adhesive S3 (fixing material) arranged in the second region 62, the absorber 4 is less likely to be twisted and exhibits good liquid absorption. It is a structure to get. Further, by overlapping the four corners of the absorber 4, which is less likely to be twisted, with the recessed portion 8 having high rigidity, the occurrence of twisting of the surface sheet 2 in the excretion portion facing region 52 is suppressed. As a result, the perceived discomfort during wearing due to the twist is reduced, and the shape-retaining property of the leak-proof lateral groove 6 is also improved.

[Fourth Adhesive S4]
In the present embodiment, an example is given in which the absorber 4 constituting a part of the panty liner 1 has a laminated structure in which one absorbent sheet is folded. When having such a laminated structure, the fourth adhesive S4 may be arranged on the inner surface of the absorber when folded, as shown in FIG. As a result, the opening of the absorber 4 is suppressed, and the shape retention of the absorber 4 is improved. The absorber 4 shown in FIG. 6 is a plan view of the absorber 4 in a folded state. As shown in FIG. 6, the coating region 74 of the fourth adhesive S4 is located, for example, in the lateral Y center portion of the absorber 4.
The coating pattern of the fourth adhesive S4 is an intermittent coating pattern in which a coated portion 76 coated with the fourth adhesive S4 and a non-coated portion 77 not coated are mixed. By adopting the intermittent coating pattern, the flexibility of the fourth adhesive S4 in the coating region 74 can be enhanced, the occurrence of liquid passage inhibition by the adhesive can be suppressed, and the liquid permeability can be improved.
The fourth adhesive S4 is not particularly limited, and those usually used for the adhesive can be used.

<Additional explanation of this embodiment>
Hereinafter, the description of this embodiment will be supplemented.

[Measurement method of absorption capacity]
The absorption capacity of each of the surface sheet 2, the colored second sheet 5, and the absorber 4, which are the members constituting the panty liner 1, can be measured by the following measurement method.
The absorption capacity of each member to be measured is measured in accordance with JIS K 7223-1996, which is a water absorption test method for highly water-absorbent resin. Each member is taken out from the absorbent article (panty liner 1) and cut into a sample of a predetermined size. The sample is immersed in physiological saline (0.9 wt% sodium chloride solution) whose temperature is adjusted to 25 ° C. so that the whole is immersed. After 10 minutes from the start of immersion, the sample is taken out from the saline solution and dehydrated using a centrifugal dehydrator (Kokusan Co., Ltd., model 130c special type). The dehydration condition is 800 rpm x 5 minutes. After dehydration, the mass of the sample is measured, the centrifugal holding amount (unit: g / g) is calculated according to the following formula, and the calculated value is used as the absorption capacity of the member to be measured. In the following equation, each mass is in g units.
Centrifugal retention = (mass of sample after centrifugal dehydration-mass of sample before water absorption) / mass of sample before water supply Measured 5 times, excluding the values of 1 point each on the top and bottom, and the average value of the remaining 3 points. It was used as a measured value. The measurement is performed at 23 ± 2 ° C. and humidity of 50 ± 5%, and the sample absorber is stored in the same environment as the measurement for 24 hours or more before the measurement.

[How to check the coated and non-coated parts]
It can be confirmed by the following method that the coated area of the adhesive has a coated portion and a non-coated portion.
The area coated with the adhesive is colored with toner, and the portion colored with toner is observed using a microscope having an image processing function. This makes it possible to confirm that the coated portion 76 and the non-coated portion 77 are mixed. Further, by observing and image processing using a microscope, the area of the coated area, the area of the coated portion 76 which is the portion colored with toner, the dimension of the non-coated portion 77 in the lateral direction, and the like are calculated. Can be done.
Further, the coating range can be confirmed by coloring the surface of the observation target member having the area coated with the adhesive with toner and observing the surface.

[Adhesive coating example]
(First Adhesive S1)
It suppresses the generation of liquid residue on the surface sheet 2, enhances the flexibility of the first adhesive S1 which is the first hydrophobic adhesive in the coated region 71, and further suppresses the occurrence of liquid flow inhibition due to the adhesive. From this point of view, the proportion of the uncoated portion 77 in the coated region 71 of the first adhesive S1 is preferably 50% or more and 90% or less.

(Second Adhesive S2)
The coating width (dimension in the lateral direction Y of the coating region 72) of the second adhesive S2, which is the second hydrophobic adhesive, suppresses the floating of the colored second sheet 5 from the absorber 4 and has liquid transferability. From the viewpoint of suppressing the occurrence of liquid return, it is preferable that the dimension of the leak-proof lateral groove 6 is shorter than the dimension in the lateral direction Y. The coating width of the second adhesive S2 is preferably 5 mm or more, more preferably 10 mm or more, and 90% or less, more preferably 70% or less of the dimension of the leakage-proof lateral groove 6 in the lateral direction Y.

The second adhesive is from the viewpoint of suppressing the generation of liquid residue on the colored second sheet 5, increasing the flexibility of the second adhesive S2 in the coated area 72, and further suppressing the occurrence of liquid flow inhibition by the adhesive. The proportion of the uncoated portion 77 in the coated region 72 of S2 is preferably 50% or more and 90% or less.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.
For example, in the above embodiments, an example of a panty liner (pantyliner) is shown as an absorbent article, but the present invention is not limited thereto. The absorbent article of the present invention may be a urine absorbing pad, a sanitary napkin, or the like.

Further, for example, in the above-described embodiment, the second adhesive S2 arranged between the colored second sheet 5 and the absorber 4 is coated with a spiral intermittent coating pattern. , The coating pattern shape is not limited to this. For example, as in the panty liner 1 shown in FIG. 7, a plurality of linear second adhesives S2 extending in parallel in the horizontal direction Y may be intermittently located in the vertical direction X in a plan view.

Further, for example, in the above-described embodiment, an example is given in which the planar shape of the colored second sheet 5 has substantially the same shape as the front surface sheet 2 and the back surface sheet 3, but the present invention is not limited to this. The colored second sheet 5 may be arranged so as to cover the absorber 4, and the absorber 4 may be located in the region where the colored second sheet 5 is located when viewed in a plan view. As a result, the absorber 4 holding the body fluid is covered with the colored second sheet 5, so that the liquid concealing effect is exhibited. FIG. 8 shows another example of the colored second sheet.
The panty liner 101 shown in FIG. 8 is different from the panty liner 1 only in that the outer shape of the colored second sheet is different. In FIG. 8, the same components as those of the panty liner 1 are designated by the same reference numerals, and the description thereof will be omitted.
As shown in FIG. 8, in a plan view, the colored second sheet 105 may have a rectangular shape slightly larger than that of the absorber 4. In FIG. 8, the colored second sheet 105 is shown by an alternate long and short dash line. In the example shown in FIG. 8, the colored second sheet 105 has the same overall length dimension in the vertical direction X as the absorber 4. The front edge of the colored second sheet 105 and the front edge of the absorber 4 are at the same position in a plan view. The trailing edge of the colored second sheet 105 and the trailing edge of the absorber 4 are at the same position in a plan view. The colored second sheet 105 has a larger dimension in the lateral direction Y than the absorber 4. The left edge of the colored second sheet 105 is located laterally Y outward of the left edge of the absorber 4. The right edge of the colored second sheet 105 is located laterally Y outward of the right edge of the absorber 4.
In the panty liner 101, the wearer can intuitively recognize the existence of the colored second sheet 105 from the difference in color between the region where the colored second sheet 105 exists and the region where the colored second sheet 105 does not exist. It is possible to remind the wearer that the coloring has a liquid hiding effect and give a sense of security.

In the panty liner 101, in the region where the absorber 4 and the colored second sheet 105 overlap, the absorber 4 and the back surface sheet 3 are joined by the third adhesive S3. In the panty liner 101, the colored second sheet 105 and the back surface sheet 3 are joined by the third adhesive S3 in the region where the absorber 4 is not located in the region where the colored second sheet 105 is located. In the panty liner 101, the front surface sheet 2 and the back surface sheet 3 are joined by the third adhesive S3 in the region where the colored second sheet 105 is not located.
In the panty liner 101, the region where the absorber 4 is not located is a region corresponding to the second region 62 of the panty liner 1 in FIG. 5, and is a peripheral portion surrounding the entire circumference of the absorber 4. In the region where the absorber 4 of the panty liner 101 is not located, the third adhesive S3 is a fixing material for fixing the colored second sheet 105 and the back surface sheet 3 or fixing the front surface sheet 2 and the back surface sheet 3. , A fixing material is located around the absorber 4.

1, 101 ... Panty liner (absorbent article)
2 ... Front sheet 3 ... Back sheet 4 ... Absorber 5, 105 ... Colored second sheet 6 ... Leakage-proof lateral groove 11 ... First constriction 12 ... Second constriction 17a ... Left side edge 17b ... Right side edge 21 ... 1st virtual line 22 ... 2nd virtual line 51 ... front area 52 ... excretion part facing area 53 ... rear area

Claims (13)

It has a vertical direction corresponding to the front-back direction of the wearer and a horizontal direction orthogonal to the vertical direction.
It has an excretion portion facing region located in the central portion in the vertical direction, a front region located vertically forward from the excretion portion facing region, and a rear region located vertically rearward from the excretion portion facing region.
The surface sheet located on the side of the skin and
The back sheet located on the non-skin side and
An absorbent article that is located between the front surface sheet and the back surface sheet and includes an absorber having a vertical length shorter than that of the front surface sheet and the back surface sheet.
A colored second sheet located between the surface sheet and the absorber so as to cover the absorber in a plan view is provided.
The absorber is a member having the highest absorption capacity among the members constituting the absorbent article.
The skin side surface of the absorbent article has a pair of front and rear leak-proof lateral grooves in which the surface sheet and the colored second sheet that do not reach the absorber toward the non-skin side surface of the absorbent article are integrally squeezed. Each of the pair of leak-proof lateral grooves has a convex shape protruding outward in the vertical direction in a plan view, and the tip of the convex portion of the pair of leak-proof lateral grooves projects in the vertical direction of the absorber in a plan view. Located within the area of
The absorbent article has a pair of left and right first constrictions and a pair of left and right second constrictions provided on both left and right edges along the vertical direction of the excretion portion facing region.
The leak-proof lateral groove is an absorbent article that does not straddle the first virtual line connecting the pair of first constrictions and the second virtual line connecting the pair of second constrictions in a plan view. The absorbent article according to claim 1, wherein the absorber contains a highly absorbent polymer and the entire surface is non-squeezed. The absorbent article according to claim 1 or 2, wherein the colored second sheet has water absorbency and is arranged on the entire surface of the absorbent article. It comprises a first hydrophobic adhesive arranged in an intermittent coating pattern between the colored second sheet and the surface sheet.
The absorbent article according to any one of claims 1 to 3, wherein the first hydrophobic adhesive is arranged on the entire surface of a region where the colored second sheet and the surface sheet overlap in a plan view. A second hydrophobic adhesive is provided between the colored second sheet and the absorber in an intermittent coating pattern.
The absorbent article according to any one of claims 1 to 4, wherein the second hydrophobic adhesive is arranged in a part of a region where the colored second sheet and the absorber overlap in a plan view. The absorbent article according to claim 5, wherein the second hydrophobic adhesive is located between the pair of front and rear leak-proof lateral grooves in a plan view. The skin side surface of the absorbent article has a recessed portion in which the surface sheet and the colored second sheet are integrally squeezed, and the recessed portion is formed on both left and right sides of the front end region of the absorber and the recessed portion. At least part of each of the left and right sides of the posterior end region of the absorber is in contact with each other.
The absorbent article according to any one of claims 1 to 6, which is arranged around the periphery of the absorber in a plan view and includes a fixing material for joining the back surface sheet and the second sheet. The absorbent article has, in the center in the lateral direction, a row of openings in which a plurality of openings provided in the surface sheet are arranged along the vertical direction.
The absorbent article according to claim 7, wherein the recessed portion does not overlap with the opened hole row in a plan view. The absorbent article has an opening row in which a plurality of openings provided in the surface sheet are arranged along the vertical direction in the center in the lateral direction, and the opening row is the absorbent row. The absorbent article according to any one of claims 1 to 7, which is arranged over the entire length in the vertical direction excluding both ends in the vertical direction of the article. Each of the pair of front and rear leak-proof lateral grooves is located outside the vertical direction of the absorbent article with respect to each of the first virtual line and the second virtual line, and each of the pair of leak-proof lateral grooves is said. 6. Absorbent article. The one according to any one of claims 1 to 10, wherein the leak-proof lateral groove is located in a plan view without straddling the individual packaging line formed by being folded in the vertical direction when the absorbent article is individually wrapped. Absorbent article. In the individually wrapped state, at least one of the pair of front and rear leak-proof lateral grooves is located between at least one of the first virtual line and the second virtual line and the individual fold line, and overlaps with each other in a plan view. The absorbent article according to claim 11. The left and right side edges of the absorbent article have a pair of left and right convex shapes that project laterally outward between the pair of left and right first constrictions and the pair of left and right second constrictions. death,
The maximum lateral width of the absorbent article in the region between the pair of left and right first constrictions and the pair of left and right second constrictions is the lateral width of the front region and the rear region. The absorbent article according to any one of claims 1 to 12, which is narrower than the maximum width.

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