JP6275364B1 - Absorbent articles - Google Patents

Abstract

The present invention provides an absorbent article that is less likely to have a foreign body feeling and poor appearance and that has an excellent wearing feeling. In the absorbent article of the present invention, the ridges (21) and the groove portions (22) continuously extending in a predetermined first direction are alternately arranged along a second direction orthogonal to the first direction. A liquid permeable sheet in which a first nonwoven fabric layer (2) having a concavo-convex structure (20) and a second nonwoven fabric layer (3) are joined at a joint (7), and further, the absorptivity The article includes a round seal portion including a first embossed portion (8) disposed inwardly from the outer peripheral edge of the absorbent article, and a first portion extending in a direction parallel to the first direction. A second embossed portion (9) disposed between one outer peripheral edge portion and the round seal portion and having a smaller planar view area than the first embossed portion (8).

Description

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

  Conventionally, absorbent articles such as panty liners, light incontinence pads, sanitary napkins, etc. have been required to have the ability to quickly absorb liquid excretion such as urine and menstrual blood and keep it from leaking outside. Further, in recent years, in addition to such ability, there is a demand for excellent touch, fit to the wearer's body, and excellent wearing feeling.

  For example, Patent Document 1 discloses an absorbent article in which a plurality of sheets are overlapped and formed in a vertically long shape having left and right side edges extending in the vertical direction, and a front edge and a rear edge. In a predetermined length range extending in the vertical direction across the horizontal center line that bisects the vertical direction, a plurality of crimping portions of the first group are provided inside the side edge portions, The plurality of crimping portions are arranged in a row following the shape of the side edge portions at a predetermined interval, and on both sides of the row formed by the crimping portions, along the arrangement direction of the plurality of crimping portions. An absorbent article is disclosed in which each extending non-crimp region is provided. As in the absorbent article disclosed in Patent Document 1, when a plurality of crimping parts such as a round seal part are provided inside the outer peripheral edge of the absorbent article, a hard crimping part is worn by the wearer. Therefore, there is an advantage that it is difficult to give the wearer a feeling of foreign matter due to the crimping portion.

JP 2004-8596 A

  On the other hand, in order to improve the flexibility and contact feel of the absorbent article and obtain a better wearing feeling, as the surface sheet of the absorbent article, it protrudes toward the skin facing surface side in the thickness direction of the absorbent article. Further, the ridge portion continuously extending in the predetermined first direction and the concave groove portion recessed toward the non-skin facing surface side in the thickness direction and continuously extending in the first direction are orthogonal to the first direction. A first nonwoven fabric having a concavo-convex structure arranged alternately along the second direction and forming a skin facing surface of the absorbent article, and adjacent to the non-skin facing surface of the first nonwoven fabric and the first A technique using a specific liquid-permeable sheet composed of a second nonwoven fabric joined to at least a part of the concave groove of the nonwoven fabric has been studied.

  However, when such a technique is applied to the absorbent article disclosed in Patent Document 1 described above, a plurality of crimping parts such as a round seal part are provided inside the outer peripheral edge of the absorbent article. Of the outer peripheral edge of the absorbent article, in the outer peripheral edge located at the end in the second direction orthogonal to the first direction in which the convex portion of the topsheet extends (particularly, located at the end in the second direction) When the outer peripheral edge is formed in a curved shape), at least a part of the end of the first nonwoven fabric is formed as a free end (that is, an unfixed end), and the end is By projecting to the skin facing surface side of the absorbent article or the outward side in the plane direction (see FIG. 4), the wearer feels a foreign object and the wear feeling is lowered, or the appearance as the absorbent article is deteriorated. There was a risk of causing problems.

  Then, an object of this invention is to provide the absorbent article which was hard to produce the above foreign material feelings and external appearance defects, and was excellent in the feeling of wear.

One aspect (aspect 1) of the present invention is a liquid-permeable sheet in which a first nonwoven fabric layer forming a skin facing surface and a second nonwoven fabric layer adjacent to the non-skin facing surface of the first nonwoven fabric layer are joined at a joint portion. And a liquid-impermeable sheet located on the non-skin facing surface side of the liquid-permeable sheet,
The first nonwoven fabric layer protrudes toward the skin facing surface side in the thickness direction of the absorbent article and continuously extends in the predetermined first direction, and the non-skin facing surface side in the thickness direction And the concave groove portions continuously extending in the first direction have a concavo-convex structure alternately arranged along a second direction orthogonal to the first direction, and at least a part of the concave groove portions. Is joined to the second nonwoven fabric layer at the joint,
Furthermore, the first nonwoven fabric layer is made of a nonwoven fabric that has a length in the second direction in a stretched state that is longer than the length in the second direction of the second nonwoven fabric layer, and can form the ridges.
The absorbent article is disposed so as to be at least partially along the outer peripheral edge at a position away from the outer peripheral edge of the absorbent article inward, and the liquid-permeable sheet and the liquid impervious. A round seal portion comprising a first embossed portion that integrates the adhesive sheet in the thickness direction;
The second outer peripheral portion disposed between a first outer peripheral edge portion extending in a direction parallel to the first direction and the round seal portion and having a smaller planar view area than the first embossed portion. It is the said absorbent article provided with an embossing part.

The absorbent article according to this aspect 1 is disposed between a first outer peripheral edge portion extending in a direction parallel to the first direction in the outer peripheral edge portion and the round seal portion, and the first of the round seal portions. Since it has the 2nd embossed part which has a plane view area smaller than 1 embossed part, the end of the 1st nonwoven fabric layer in the neighborhood of the peripheral edge part of an absorptive article is rolled up by the 2nd embossed part, and skin Protruding to the opposing surface side or projecting outward in the plane direction can be suppressed, and it is possible to make it difficult to cause a foreign object feeling and poor appearance due to the protrusion of the end portion.
Moreover, since the above-mentioned 2nd embossed part has a planar view area smaller than the 1st embossed part of a round seal part, the said 2nd embossed part is a wearer's large temporarily. Even if the skin surface of the thigh or the like is touched, the hardness thereof is hardly perceived by the wearer (that is, it is difficult to give the wearer a foreign body feeling) and is achieved by the liquid permeable sheet having the specific uneven structure. An excellent wearing feeling can be maintained well.

  Moreover, in another aspect (aspect 2) of the present invention, in the absorbent article according to aspect 1, the ridge portion has a hollow internal structure.

  Since the absorbent article of this aspect 2 has a hollow internal structure of the first nonwoven fabric layer, the absorbent article can have good cushioning properties and a softer touch, and is further excellent as an absorbent article. A feeling of wearing can be obtained.

  In still another aspect (Aspect 3) of the present invention, in the absorbent article according to Aspect 1 or 2, the second outer peripheral edge extending in a direction parallel to the second direction of the outer peripheral edge and the round. The second embossed portion is not disposed between the seal portion.

  In the absorbent article according to aspect 3, the second embossed portion is disposed between the second outer peripheral edge portion extending in a direction parallel to the second direction in the outer peripheral edge portion and the round seal portion. Therefore, in the second outer peripheral edge portion where the end portion of the first nonwoven fabric layer hardly protrudes, there is no hard portion due to the embossed portion, and it is difficult to give the wearer a sense of foreign matter. It has become. Thereby, the absorbent article of this aspect 3 can maintain the outstanding wearing feeling more reliably.

  In still another aspect (Aspect 4) of the present invention, in the absorbent article according to any one of the aspects 1 to 3, the absorbent article has a vertically long outer shape having a longitudinal direction and a width direction orthogonal to each other. The first direction is parallel to the width direction.

In the absorbent article according to aspect 4, the first direction in which the protrusions of the first nonwoven fabric layer extend is parallel to the width direction of the absorbent article having a vertically long outer shape, and the first nonwoven fabric layer has the first nonwoven fabric layer. Since the first outer peripheral edge portion where the end portion is likely to protrude is the outer peripheral edge portion of the end portion in the longitudinal direction of the absorbent article, the width of the absorbent article where the wearer's thigh and buttocks are easy to contact In the outer peripheral edge portion of the end portion in the direction, the protrusion of the end portion of the first non-woven fabric layer is less likely to occur, and a foreign object feeling due to the protrusion of the end portion is less likely to occur. Thereby, the absorptive article of this mode 4 can maintain the above-mentioned outstanding wearing feeling still more reliably.
Moreover, when the absorbent article of this aspect 4 further contains the structure of the above-mentioned aspect 3, between the 2nd outer periphery part of the edge part in the width direction of an absorbent article, and the said round seal part, it is the above-mentioned. Since the second embossed portion is not arranged, the absorbent article is formed by the embossed portion on the second outer peripheral edge portion of the end portion in the width direction of the absorbent article which is easily contacted by the wearer's thigh and buttocks. A hard part does not exist and it is hard to give a wearer the foreign body feeling more reliably.

  In still another aspect (Aspect 5) of the present invention, in the absorbent article according to any one of Aspects 1 to 4, the first nonwoven fabric layer and the second nonwoven fabric layer are bonded to each other through an adhesive at the bonding portion. On the other hand, an adhesive non-existing region where the adhesive is not present is provided between the outer peripheral edge portion and the land seal portion.

  The absorbent article according to this aspect 5 has an adhesive non-existing region where the adhesive for joining the first nonwoven fabric layer and the second nonwoven fabric layer is not present between the outer peripheral edge portion and the land seal portion. Therefore, in the vicinity of the outer peripheral edge where it is easy to touch the skin surface of the wearer, the hardness of the bonded portion by the adhesive is hardly perceived by the wearer, and the wearer can be made more difficult to feel a foreign object or the like. .

  In still another aspect (Aspect 6) of the present invention, in the absorbent article according to any one of Aspects 1 to 5, the first nonwoven fabric layer has a thickness larger than that of the second nonwoven fabric layer.

In the absorbent article according to aspect 6, since the first nonwoven fabric layer has a thickness larger than that of the second nonwoven fabric layer, in the first nonwoven fabric layer, a restoring force against compression in the thickness direction of the ridges. Can be secured, and higher cushion performance can be exhibited. Further, when such a nonwoven fabric having a large restoring force of the protruding portion is used for the first nonwoven fabric layer, the end portion of the first nonwoven fabric layer is usually rolled up and protrudes to the skin facing surface side, or in the planar direction. However, since the absorbent article according to the sixth aspect includes the above-described second embossed portion, it is possible to suppress the protrusion of the end portion of the first nonwoven fabric layer. it can.
Therefore, the absorbent article of the present aspect 6 can make it difficult to cause a foreign object feeling and a poor appearance due to the protrusion of the end portion described above while exhibiting higher cushioning performance.

  In still another aspect (Aspect 7) of the present invention, in the absorbent article according to any one of Aspects 1 to 6, the second embossed portion overlaps at least the first outer peripheral edge in a plan view. Is arranged.

  In the absorbent article according to aspect 7, the second embossed portion is disposed at a position where at least the first outer peripheral edge overlaps, so that the second embossed portion causes the above-mentioned in the vicinity of the outer peripheral edge of the absorbent article. The part which becomes a free end of the 1st nonwoven fabric layer can be reduced, and the end of the above-mentioned 1st nonwoven fabric layer is rolled up and protrudes to the skin facing surface side, or protrudes outward in the plane direction. Furthermore, it can suppress reliably. Thereby, the absorptive article of this mode 7 can make it difficult to produce the foreign object feeling and the appearance defect by the above-mentioned projection of the end.

  In still another aspect (Aspect 8) of the present invention, in the absorbent article according to any one of Aspects 1 to 7, the first outer peripheral edge protrudes outward in the second direction in plan view. The second embossed portion is disposed along the outer shape of the first outer peripheral edge.

  In the absorbent article according to aspect 8, the second embossed portion is arranged so as to follow the curved outer shape of the first outer peripheral edge portion of the absorbent article, so that the end portion of the first nonwoven fabric layer is free. Even an absorbent article having an outer shape that is easy to be formed as an end (that is, an outer shape that is curved so that the first outer peripheral edge protrudes outward in the second direction in a plan view) is described above. It can suppress more reliably that the edge part of the 1st nonwoven fabric layer rolls up, protrudes to the skin opposing surface side, or protrudes to the outward side of a plane direction. Thereby, the absorptive article of this mode 8 can make it difficult to produce the feeling of foreign material and the appearance defect by the above-mentioned projection of the end more certainly.

  ADVANTAGE OF THE INVENTION According to this invention, the above-mentioned foreign material feeling and external appearance defect are hard to produce, and the absorbent article excellent in the feeling of wear can be provided.

FIG. 1 is a partially broken perspective view of a panty liner 1 according to an embodiment of the present invention. FIG. 2 is a plan view of the panty liner 1 according to one embodiment of the present invention. 3 is a partial cross-sectional view of the panty liner 1 according to the embodiment of the present invention, taken along line III-III in FIG. FIG. 4 is a partial cross-sectional view corresponding to FIG. 3 of the panty liner 1 ′ that does not include the second embossed portion. FIG. 5 is an enlarged plan view of a main part of a panty liner according to another embodiment of the present invention. FIG. 6 is a plan view of a panty liner 10 according to still another embodiment of the present invention.

  Hereinafter, preferred embodiments of the absorbent article of the present invention will be described in detail with reference to the drawings. In the present specification, unless otherwise specified, “an object placed on a horizontal surface in an unfolded state (for example, an absorbent article, a surface sheet (liquid permeable sheet), etc.) "Looking in the thickness direction of the object" is simply called "plan view".

Various directions and the like used in this specification are as follows unless otherwise specified.
In the present specification, the “longitudinal direction” refers to a “long direction of a vertically long target object (for example, an absorbent article, a surface sheet (liquid permeable sheet), etc.) in plan view”, and a “width direction”. Refers to “the direction in which the length of the vertically long object in the plan view is short (short direction)”, and “thickness direction” is “the direction perpendicular to the object placed on the horizontal plane in the unfolded state” The longitudinal direction, the width direction, and the thickness direction are orthogonal to each other. In the present specification, the “planar direction” means “a direction in which a plane of a substantially sheet-like object (for example, an absorbent article, a surface sheet (liquid permeable sheet), etc.) in a plan view extends (that is, a horizontal plane direction) The plane direction and the thickness direction are orthogonal to each other.
Further, in the present specification, “in the longitudinal direction of a longitudinally long object, a position relatively proximal to a longitudinal central axis _CW that is located at the center of the object and extends in the width direction” is defined. This is called “inward side in the longitudinal direction”, and “relatively distal to the longitudinal central axis C _W in the longitudinal direction of the vertically long object” is called “outward side in the width direction”. Similarly, “in the width direction of the vertically long object, positioned in the center in the width direction of the object and relatively proximal to the width direction central axis C _L extending in the longitudinal direction” The term “inward side” refers to “the distal side relative to the central axis C _L in the width direction in the width direction of the vertically long object” as “the outer side in the width direction”. Further, in the present specification, “in the plane direction of the substantially sheet-like object, the relatively proximal side relative to the intersection of the longitudinal center axis C _W and the width direction center axis C _L of the object” is defined as “ “Inward side in the plane direction”, “in the plane direction of the substantially sheet-like object, relatively distal to the intersection of the longitudinal center axis C _W and the width direction center axis C _L of the object. Is referred to as “the outer side in the plane direction”.
In the present specification, unless otherwise specified, in the thickness direction of the absorbent article, “relatively proximal to the wearer's skin when wearing the absorbent article” "The distal side relative to the skin surface of the wearer when the absorbent article is worn" is referred to as "the non-skin surface side". Here, “when wearing” means from the time when the wearer wears the absorbent article (that is, when the wearable state is formed) to the time that the state is maintained (while being worn) means.
In the present specification, “the surface on the skin facing surface side” and “the surface of the various members constituting the absorbent article (for example, a surface sheet (liquid permeable sheet), a back sheet (liquid impermeable sheet), etc.)” and “ The “surface on the non-skin facing surface side” is simply referred to as “skin facing surface” and “non-skin facing surface”, respectively.

FIG. 1 is a partially cutaway perspective view of a panty liner 1 according to an embodiment of the present invention, FIG. 2 is a plan view of the panty liner 1, and FIG. 3 is III-III in FIG. 2 of the panty liner 1. It is a fragmentary sectional view in alignment with a line.
As shown in FIGS. 1 and 2, the panty liner 1 according to an embodiment of the present invention has a vertically long outer shape having a longitudinal direction L and a width direction W in plan view, and more specifically. The outer peripheral edge portions (first outer peripheral edge portions E ₁ in FIGS. 1 and 2) located at both ends in the longitudinal direction L are curved so as to protrude outward in the longitudinal direction L, respectively. Further, the substantially central portion in the longitudinal direction L has a vertically long outer shape slightly constricted toward the inner side in the width direction W.
In the present invention, the outer shape of the absorbent article is not limited to such an embodiment, and any outer shape (for example, a rectangle, an ellipse, an hourglass, etc.) may be adopted according to various applications. it can.

As shown in FIGS. 1 to 3, the panty liner 1 according to the present embodiment is located in the skin facing surface side Da of the panty liner 1 in the thickness direction T and includes a specific uneven structure 20 described later. 1 non-woven fabric layer 2 and a top sheet 4 composed of a liquid-permeable sheet constituted by the second non-woven fabric layer 3 laminated on the first non-woven fabric layer 2 and a liquid surface located on the non-skin facing surface side Db of the panty liner 1 A back sheet 6 made of a permeable sheet and an intermediate sheet 5 located between these sheets are provided as a basic configuration, and the surface of the top sheet 4 on the skin facing surface side Da (that is, the skin facing surface) is The skin facing surface of the panty liner 1 is formed, and the surface of the back sheet 6 on the non-skin facing surface side (that is, the non-skin facing surface) forms the non-skin facing surface of the panty liner 1.
In the present embodiment, the top sheet 4 and the intermediate sheet 5 and the intermediate sheet 5 and the back sheet 6 are joined via an adhesive layer (not shown) made of a hot-melt adhesive. Yes.

Further, as shown in FIG. 3, the non-skin facing surface of the back sheet 6 is arranged so that a plurality of adhesives continuously extending in the width direction W are arranged along the longitudinal direction L (so-called stripe shape). The adhesive portion 12 for fixing clothes is provided, and further, the surface of the adhesive portion 12 on the non-skin facing surface side is disposed so as to cover substantially the entire non-skin facing surface of the back sheet 6. The release sheet 11 for protecting the adhesive part 12 before use is provided. When the panty liner 1 configured in this manner is worn, the above-described release sheet 11 is peeled off, and the panty liner 1 is attached to the non-skin facing surface of the back sheet 6 by the adhesive fixing part 12 for fixing clothes. It fixes to the inner surface of a wearer's clothes (for example, underwear etc.), and it wears so that the surface sheet 4 may oppose a wearer's skin surface.
The pressure-sensitive adhesive forming the above-mentioned pressure-sensitive adhesive portion is not particularly limited as long as it can fix the absorbent article to the wearer's clothes, and for example, any pressure-sensitive adhesive containing a styrene polymer or the like can be used. it can. Further, the arrangement pattern of the pressure-sensitive adhesive is not particularly limited, and the pressure-sensitive adhesive may extend intermittently in the width direction W, and may extend continuously or intermittently in the longitudinal direction L.

And in the panty liner 1 which concerns on this embodiment, the surface sheet 4 is the non-skin of the 1st nonwoven fabric layer 2 which forms the skin opposing surface of the panty liner 1, and this 1st nonwoven fabric layer 2, as shown in FIG. The second nonwoven fabric layer 3 adjacent to the facing surface is composed of a liquid permeable sheet joined at the joining portion 7, and the first nonwoven fabric layer 2 is on the skin facing surface side in the thickness direction T of the panty liner 1. A ridge portion 21 projecting toward and extending continuously in a first direction D ₁ corresponding to the width direction W of the panty liner 1, and recessed in the thickness direction T toward the non-skin facing surface and in the first direction which has a convex-concave structure 20 arranged alternately with grooves 22 along the second direction D ₂ corresponding to the longitudinal direction L of the panty liner 1 to D ₁ extends continuously, at least a portion the groove portion 2 There has been joined to the second nonwoven fabric layer 3 at the joint portion 7. Incidentally, the first nonwoven layer 2 forms a first direction D length of ₁ is longer than the length in the first direction D ₁ of the second nonwoven fabric layer 3, the ridges 21 in a state of being extended Made of a non-woven fabric.
Further, as shown in FIGS. 1 to 3, the panty liner 1 is disposed along the outer peripheral edge portion at a position away from the outer peripheral edge portion of the panty liner 1 in the planar direction inward in a plan view. A round seal comprising a first embossed portion 8 for integrating the top sheet 4 (liquid permeable sheet), the intermediate sheet 5 and the back sheet 6 (liquid impermeable sheet) in the thickness direction T of the panty liner 1. The portion R _S and the outer peripheral edge of the panty liner 1 extend in a direction parallel to the first direction D ₁ (that is, located at both ends in the longitudinal direction L of the panty liner 1 and substantially in the width direction) a second embossed portion 9 having a smaller plan view area than disposed and the first embossed portion 8 between the extending W) and the first outer peripheral edge portion E ₁ and the round seal portion R _S, It is provided.

The panty liner 1 according to the present embodiment includes a first outer peripheral edge E ₁ extending in a direction parallel to the first direction D ₁ among the outer peripheral edges of the panty liner ₁ and the round seal portion R _S. Since it has the 2nd embossing part 9 which is arrange | positioned in between and has a planar view area smaller than the 1st embossing part 8 of the said round seal | sticker part _RS , the outer periphery of the panty liner 1 by the said 2nd embossing part 9 The end portion 24 of the first nonwoven fabric layer 2 in the vicinity of the portion (that is, in the vicinity of the first outer peripheral edge E ₁ ) is rolled up and protrudes to the skin facing surface side Da or protrudes outward in the planar direction. It is possible to suppress this, and it is difficult for the foreign matter feeling and the appearance defect due to the protrusion of the end portion 24 to occur.
Moreover, since the above-mentioned 2nd embossed part 9 has a planar view area smaller than the 1st embossed part 8 of round seal | sticker part _RS , the said 2nd embossed part 9 is a wearer's temporary provision. Even if the skin surface such as the thigh or the buttocks is touched, the hardness thereof is difficult to be detected by the wearer (that is, it is difficult to give the wearer a foreign body feeling), and the liquid permeability having the specific concavo-convex structure 20 described above. The excellent wearing feeling produced by the sheet can be maintained well.

Here, FIG. 4 is a partial cross-sectional view corresponding to FIG. 3 of the panty liner 1 ′ not provided with the second embossed portion as described above, and in FIG. 4, constituent elements other than the second embossed portion, that is, The first nonwoven fabric layer 2 ′, the second nonwoven fabric layer 3 ′, the intermediate sheet 5 ′, the back sheet 6 ′, the joining portion 7 ′, the first embossed portion 8 ′, the release sheet 11 ′, and the adhesive portion 12 ′ are respectively described above. This is the same as the embodiment.
As shown in FIG. 4, the panty liner 1 ′ not provided with the second embossed portion as described above has a protruding portion 21 ′ of the first nonwoven fabric layer 2 ′ extending out of the outer peripheral edge portion of the panty liner 1 ′. At the outer peripheral edge E ′ ₁ located at the end of the second direction orthogonal to the first direction (that is, the longitudinal direction L of the panty liner 1 ′) (particularly, the outer peripheral edge E ′ ₁ is curved in plan view) At least a portion of the first nonwoven fabric layer 2 'is formed as a free end, and the end 24' is on the skin facing surface side of the panty liner 1 '. Or it wears by protruding to the outward side of a plane direction (In addition, the aspect shown in FIG. 4 is an aspect in which edge part 24 'protrudes to the outward side of the plane direction of panty liner 1'). Give a feeling of foreign material to the wearer, and the wear feeling may be reduced. There is a possibility of causing problems such as the appearance of or worsening.

In the present invention, the outer peripheral edge of the absorbent article refers to the outer edge of the outer shape of the absorbent article in plan view. For example, in the panty liner 1 according to the above-described embodiment, the longitudinal direction of the panty liner 1 The first outer peripheral edge E ₁ located at each of both ends in L and the second outer peripheral edge E ₂ located at each of both ends in the width direction W are configured. The first outer peripheral edge portion E _1, of the outer peripheral edge portion of the panty liner 1, the outer peripheral edge portion extending in the first direction D ₁ substantially parallel to the direction in which the first nonwoven layer 2 of the convex portion 21 extends Yes, the second outer peripheral edge E ₂ is substantially parallel to the second direction D ₂ orthogonal to the first direction D _{1 in} which the protruding strips 21 of the first nonwoven fabric layer 2 extend, out of the outer peripheral edge of the panty liner 1. It is an outer peripheral edge extending in the direction.
Moreover, in this invention, the protruding item | line part and the ditch | groove part of a 1st nonwoven fabric layer are located in the skin facing surface side most in the thickness direction of a 1st nonwoven fabric layer (namely, the highest direction of a protruding item | line part). The first virtual horizontal plane including the point) and the second virtual horizontal plane including the lowest point of the concave groove portion (that is, the point closest to the non-skin facing surface in the thickness direction) (that is, the first A portion projecting toward the skin facing surface side with respect to the third virtual horizontal plane (positioned so that the distance from each of the first virtual horizontal plane and the second virtual horizontal plane is equal) is referred to as a ridge, A portion that is recessed toward the skin facing surface is referred to as a groove portion.
In the present specification, the “plan view area” means the area of the outer shape (that is, the plan view shape) of the object in plan view. Therefore, when the planar view shape of the first embossed portion or the second embossed portion is a circle, the area of the circle is the planar view area of the first embossed portion or the second embossed portion. In addition, the planar view shape of the first embossed portion or the second embossed portion is a shape formed by combining a plurality of geometric figures or the like (that is, a shape in which individual geometric figures or the like are continuously connected). In some cases, the area of the combined shape as a whole is an area in plan view, and a plurality of geometric figures etc. are assembled without being combined (that is, individual geometric figures etc. are not connected, In the case of a shape formed by gathering, the area of the shape of each geometrical figure or the like is a planar view area.

  Hereinafter, various members and the like constituting the absorbent article of the present invention will be described in more detail using the panty liner 1 according to the above-described embodiment.

[Surface sheet]
In the panty liner 1 according to the present embodiment, as shown in FIGS. 1 and 3, the top sheet 4 is disposed at a position on the skin facing surface side Da of the panty liner 1 that can be in direct contact with the skin surface of the wearer. The first nonwoven fabric layer 2 that forms the skin facing surface of the panty liner 1 and has the specific uneven structure 20 described above, and the second nonwoven fabric layer 3 adjacent to the non-skin facing surface of the first nonwoven fabric layer 2 Is constituted by a liquid-permeable sheet joined at the joint 7.

In the present embodiment, as shown in FIGS. 1 and 2, the top sheet 4 extends between the first outer peripheral edges E ₁ located at both ends in the longitudinal direction L of the panty liner 1 in plan view. A longitudinal outer shape that extends between the second outer peripheral edge portions E ₂ located at both ends in the width direction W of the panty liner 1 and extends similarly to the outer shape of the panty liner 1. have. In the absorbent article of the present invention, the surface sheet (liquid permeable sheet) is not limited to such a shape, and may have any shape and size in plan view.

And the liquid-permeable sheet used as the surface sheet 4 in this embodiment forms the skin opposing surface of the panty liner 1, and has the above-mentioned specific uneven structure 20 and the first nonwoven fabric layer. The second non-woven fabric layer 3 adjacent to the non-skin facing surface 2 is composed of a liquid-permeable sheet joined at the joint 7.
As described above, the first nonwoven fabric layer 2 constituting the liquid permeable sheet protrudes toward the skin facing surface side Da in the thickness direction T of the panty liner 1 and corresponds to the width direction W of the panty liner 1. a convex portion 21 extending continuously in the direction D _1, the thickness and the depression toward the non-skin facing side Db in the direction T extends continuously in the first direction D ₁ recessed groove portion 22 and the panty liner 1 Specific concave-convex structures 20 that are alternately arranged along the second direction D ₂ corresponding to the longitudinal direction L of the second non-woven fabric layer. 3 is joined.
In addition, in this invention, even if the specific uneven structure provided with the above-mentioned protruding item | line part and a ditch | groove part is formed in the whole area | region of a 1st nonwoven fabric layer like this embodiment, it forms only in a one part area | region. May be.

  Furthermore, in this embodiment, the said protruding item | line part 21 has the hollow part 23 which the non-skin opposing surface of the 1st nonwoven fabric layer faces as shown in FIG. Although it is not an essential constituent requirement in the absorbent article of the present invention that the protruding portion of the first nonwoven fabric layer has such a hollow internal structure, the protruding portion of the first nonwoven fabric layer has such a hollow shape. When it has this internal structure, a favorable cushioning property and a softer touch can be obtained, and a more excellent wearing feeling can be obtained as an absorbent article. On the other hand, when the protruding portion of the first nonwoven fabric layer has a solid internal structure, it is difficult to form a gap between the first nonwoven fabric layer and the second nonwoven fabric layer, and the liquid-permeable sheet faces the skin. The liquid transfer from the surface side to the non-skin facing surface side is improved.

  In the present invention, the height of the protruding portion of the first nonwoven fabric layer is not particularly limited as long as the effect of the present invention is not hindered. For example, the height is in the range of 0.01 mm to 6.0 mm. From such points, it is preferably within a range of 0.1 mm to 4.0 mm, and more preferably within a range of 0.1 mm to 3.0 mm. Similarly, the depth of the groove portion of the first nonwoven fabric layer is not particularly limited as long as the effect of the present invention is not impaired. For example, the depth is in the range of 0.01 mm to 6.0 mm. Therefore, it is preferably within a range of 0.1 mm to 4.0 mm, and more preferably within a range of 0.1 mm to 3.0 mm. In the present specification, the “height of the ridge portion” refers to the height from the second virtual horizontal plane to the highest point of the ridge portion (ie, the first virtual horizontal plane and the second virtual horizontal plane). The distance between the first virtual horizontal plane and the second virtual plane is the depth from the first virtual horizontal plane to the lowest point of the concave groove section (that is, the first virtual horizontal plane and the second virtual plane). Means the distance to the horizontal plane).

  In this invention, the width | variety (namely, the maximum length in the 2nd direction of a protruding item | line part and a ditch | groove part) of a 1st nonwoven fabric layer is not restrict | limited especially unless the effect of this invention is inhibited, For example, it is in the range of 0.1 mm to 15.0 mm, but preferably in the range of 0.5 mm to 10.0 mm, more preferably in the range of 1.0 mm to 5.0 mm, from the viewpoint of cushioning properties and touch. Is within.

  Further, in the present invention, the direction in which the ridges and the groove portions of the first nonwoven fabric layer extend, that is, the first direction is not particularly limited, but the absorbent article has a vertically long outer shape as in the above-described embodiment. It is preferable to be parallel to the width direction. When the first direction in which the protruding portions and the groove portions of the first nonwoven fabric layer extend is parallel to the width direction of the absorbent article having a vertically long outer shape, the protrusion of the end portion of the first nonwoven fabric layer described above Since the said 1st outer periphery part which is easy to produce turns into the outer periphery part of the edge part in the longitudinal direction of an absorbent article, the end part in the width direction of the absorbent article which a wearer's thigh and a buttock are easy to contact In the outer peripheral edge portion, the protrusion of the end portion of the first nonwoven fabric layer is less likely to occur, and a foreign object feeling due to the protrusion of the end portion is less likely to occur. Thereby, the absorptive article provided with this composition can maintain the above-mentioned outstanding wearing feeling still more reliably.

In the above-described embodiment, the length of the first nonwoven fabric layer 2 in the first direction D ₁ in the extended state (that is, the flat state before forming the uneven structure) is the second nonwoven fabric layer 3. is formed from a long nonwoven fabric than the length of one direction D _1, in such a nonwoven fabric, any processing method (e.g., heating with or without heating at shaping processing or the like) with a specific uneven structure 20 described above It is formed by giving. The application of the specific concavo-convex structure 20 may be performed before joining the second nonwoven fabric layer 3 or may be performed substantially simultaneously with the joining of the second nonwoven fabric layer 3.

  The non-woven fabric forming the first non-woven fabric layer is not particularly limited as long as it is a non-woven fabric having predetermined liquid permeability. Any non-woven fabric such as a combination (eg, SMS non-woven fabric) can be used. Among these, a spunlace nonwoven fabric can be suitably used because it is excellent in flexibility and the like.

  Further, the fibers constituting the first nonwoven fabric layer are not particularly limited as long as the first nonwoven fabric layer has a predetermined liquid permeability, and any fiber can be used. Therefore, it is preferable to use hydrophilic fibers. Examples of such hydrophilic fibers include cellulose fibers such as cotton and pulverized pulp; regenerated cellulose fibers such as rayon and fibril rayon; semi-synthetic cellulose fibers such as acetate and triacetate; and thermoplastic resin fibers subjected to hydrophilic treatment. And composite fibers. Among these, it is preferable to use cellulose fibers such as cellulose fibers, regenerated cellulose fibers, and semi-synthetic cellulose fibers because they are excellent in liquid absorbency, liquid retention, flexibility, touch, and the like. Or it is preferable to use the mixed fiber which combined these.

  In addition, in the case where the absorbent article is separately provided with an intermediate sheet or absorber that can absorb and hold excrement such as urine, or when the amount of excrement targeted is assumed to be small, In addition to the above-mentioned hydrophilic fibers, the first nonwoven fabric layer is a polyolefin fiber such as polyethylene (PE) or polypropylene (PP); a polyester fiber such as polyethylene terephthalate (PET); a hydrophobic property such as a heat-fusible fiber. These thermoplastic resin fibers may be included. When the first nonwoven fabric layer includes such thermoplastic resin fibers, the content thereof is not particularly limited, but from the viewpoint of securing a certain level of absorption performance, it should be included at a mass ratio of less than 50 mass%. Is preferred.

In addition, the basis weight of the first nonwoven fabric layer is not particularly limited as long as the effect of the present invention is not hindered, and any basis weight in consideration of liquid absorbency, liquid retention, cushioning property, flexibility, etc. may be adopted. it can. Such basis weight, for example, a basis weight in the range of 5g / m ² ~60g / m ² and the like, preferably in the range of ^{10g / m 2 ~50g / m 2} . The basis weight can be measured according to JIS L 1906 5.2.

  The thickness of the first non-woven fabric layer is not particularly limited as long as the effect of the present invention is not impaired, and for example, a thickness in the range of 0.001 mm to 5.0 mm can be adopted. From the viewpoints of cushioning properties, flexibility, touch, etc., the thickness is preferably in the range of 0.01 mm to 3.0 mm, and more preferably in the range of 0.05 mm to 2.0 mm.

  In the present invention, the first nonwoven fabric layer preferably has a larger thickness than the second nonwoven fabric layer. When the first nonwoven fabric layer has a thickness greater than that of the second nonwoven fabric layer, the first nonwoven fabric layer can secure a restoring force against compression in the thickness direction of the ridges, and thus a higher cushion. Performance can be demonstrated. Moreover, when the nonwoven fabric with such a high restoring force of a protruding part is used for a 1st nonwoven fabric layer, normally the edge part of the above-mentioned 1st nonwoven fabric layer rolls up, protrudes to the skin opposing surface side, or a plane direction Although it becomes easy to protrude outward, since the absorbent article of the present invention includes the above-described second embossed portion, it is possible to suppress such protrusion of the end portion of the first nonwoven fabric layer. Therefore, by using such a non-woven fabric for the first non-woven fabric layer, the absorbent article of the present invention makes it difficult to produce a foreign object feeling and poor appearance due to the protrusion of the end portion described above while exhibiting higher cushion performance. be able to.

  Here, the thicknesses of various sheets such as the non-woven fabric used for the first non-woven fabric layer and the second non-woven fabric layer, and an intermediate sheet and a back sheet described later are samples of a predetermined size (for example, 30 mm × 30 mm) from the measurement target sheet. When a sheet is cut out and the cut out sample sheet is set in an automated compression tester (model: KES FB-3A) manufactured by Kato Tech Co., Ltd., and the pressure on the sample sheet by the measurement terminal of the tester is 49 Pa Can be obtained by measuring the thickness (mm).

  In the above-described embodiment, the second nonwoven fabric layer 3 constituting the liquid permeable sheet is adjacent to the non-skin facing surface of the first nonwoven fabric layer 2, and the non-skin of the concave groove portion 22 of at least a part of the first nonwoven fabric layer 2. It is joined to the opposing surface at the joint 7. In the present embodiment, the second nonwoven fabric layer 3 has a substantially flat structure and is formed of a nonwoven fabric having a predetermined liquid permeability. Although it is not an essential constituent requirement in the absorbent article of the present invention that the second nonwoven fabric layer has such a substantially flat structure, the second nonwoven fabric layer has such a substantially flat structure. And, it is easy to form a hollow portion of a predetermined volume or more inside the protruding portion of the first nonwoven fabric layer, and can impart more excellent cushioning properties and flexibility to the liquid permeable sheet, as an absorbent article An even better wearing feeling can be obtained. On the other hand, when the second nonwoven fabric layer has a structure that enters the hollow portion of the protruding portion of the first nonwoven fabric layer or a structure that fills the hollow portion, the first nonwoven fabric layer and the second nonwoven fabric layer It is difficult to form a gap between them, and the liquid transfer property from the skin facing surface side to the non-skin facing surface side of the liquid permeable sheet is improved.

  The non-woven fabric forming the second non-woven fabric layer is not particularly limited as long as it is a non-woven fabric having a predetermined liquid permeability. For example, a tissue made of hydrophilic fibers, a hydrophobic non-woven fabric, a water-repellent non-woven fabric, and the first non-woven fabric layer described above. Any nonwoven fabric such as spunlace nonwoven fabric, air-through nonwoven fabric, spunbond nonwoven fabric, point bond nonwoven fabric, melt blown nonwoven fabric, and combinations thereof (for example, SMS nonwoven fabric) can be used. Especially, the tissue which consists of hydrophilic fiber can be used suitably from the point that it is excellent in a liquid absorptivity, liquid retention, a softness | flexibility, etc.

  In addition, the fibers constituting the second nonwoven fabric layer are not particularly limited as long as the second nonwoven fabric layer has a predetermined liquid permeability, and any fiber can be used. From the above, it is preferable to use the same hydrophilic fiber as that of the first nonwoven fabric layer. Furthermore, the 2nd nonwoven fabric layer may contain the thermoplastic resin fiber other than the hydrophilic fiber similarly to the above-mentioned 1st nonwoven fabric layer.

The basis weight of the second non-woven fabric layer is not particularly limited as long as the effect of the present invention is not impaired, and any basis weight considering liquid absorbability, liquid retention, cushioning property, flexibility, and the like can be adopted. Such basis weight, for example, include a basis weight in the range of ^{1g / m 2 ~50g / m 2} , preferably in the range of ^{3g / m 2 ~40g / m 2} .

  The thickness of the second non-woven fabric layer is not particularly limited as long as the effect of the present invention is not impaired. For example, a thickness in the range of 0.001 mm to 3.0 mm can be adopted, but the liquid absorbing property and the liquid retaining property can be adopted. From the viewpoints of cushioning properties, flexibility, etc., the thickness is preferably in the range of 0.01 mm to 2.0 mm, and more preferably in the range of 0.05 mm to 1.0 mm.

[Joint part]
In the above-described embodiment, as shown in FIGS. 1 and 3, the panty liner 1 includes the first nonwoven fabric layer 2 (more specifically, the groove portion 22 of the first nonwoven fabric layer 2) and the second nonwoven fabric layer 3. Are joined to each other through an adhesive (not shown) such as a hot-melt adhesive at the joint 7. Thus, when the 1st nonwoven fabric layer 2 and the 2nd nonwoven fabric layer 3 are joined in the joined part 7, since it becomes difficult to produce the position shift and deformation | transformation in these each layer, the absorption performance and wear feeling of an absorbent article Can be exhibited more stably.

Moreover, in the panty liner 1 of the present embodiment, the first nonwoven fabric layer 2 and the second nonwoven fabric layer 3 are joined to each other at the joining portion 7 via an adhesive, while the outer peripheral edge portion of the panty liner 1 is Between the land seal portion R _S , there is an adhesive non-existing region where no adhesive is present. The absorbent article has such an adhesive non-existing region where there is no adhesive for joining the first nonwoven fabric layer and the second nonwoven fabric layer between the outer peripheral edge of the absorbent article and the land seal portion. Since it is difficult for the wearer to perceive the hardness of the joint portion due to the adhesive in the vicinity of the outer peripheral edge where it is easy to touch the skin surface of the wearer, it is difficult to give the wearer a sense of foreign matter or the like. can do.

  In the present invention, the arrangement pattern of the adhesive used for joining the first nonwoven fabric layer and the second nonwoven fabric layer is not particularly limited, and for example, a plurality of adhesives extending in the first direction and / or the second direction in plan view. Arbitrary arrangement patterns such as spiral shapes, omega shapes, wavy shapes, zigzag shapes, stripe shapes, and belt shapes can be employed.

  Furthermore, the arrangement region (arrangement range) and the arrangement amount (coating amount) of the adhesive are not particularly limited as long as the effects of the present invention are not impaired, and any arrangement considering desired flexibility, liquid permeability, and the like. A region and an arrangement amount can be adopted. Moreover, the above-mentioned adhesive may be arrange | positioned at the non-skin opposing surface of the ditch | groove part in a 1st nonwoven fabric layer, or may be arrange | positioned at the skin opposing surface of a 2nd nonwoven fabric layer.

  In the present invention, means for joining the first nonwoven fabric layer and the second nonwoven fabric layer is not limited to the above-mentioned adhesive, and for example, pressing means such as heating or non-heating embossing or heat such as ultrasonic welding. Arbitrary joining means such as fusion means can be used. For example, when the first non-woven fabric layer and the second non-woven fabric layer are joined by pressing means or heat fusion means, the joining portion (fusion portion) is not easily affected by decomposition by excrement such as urine. Even when wet with excreta such as the above, the joined state of the joined portion can be maintained well, and the absorbent article is less likely to be twisted. As a result, such an absorbent article can maintain a good wearing feeling even when wet.

[Intermediate sheet]
In the panty liner 1 according to the present embodiment, the intermediate sheet 5 is disposed so as to be positioned between the top sheet 4 and the back sheet 6 in the thickness direction T of the panty liner 1 as shown in FIGS. Thus, the panty liner 1 functions to impart various characteristics such as cushioning properties, strength, and absorption performance.
In the present embodiment, the intermediate sheet 5 extends between the first outer peripheral edges E ₁ located at both ends in the longitudinal direction L of the panty liner 1 in a plan view, and the width of the panty liner 1. It extends between the second outer peripheral edge portions E ₂ located at both ends in the direction W, and has a vertically long outer shape similar to the outer shape of the panty liner 1.
In the absorbent article of the present invention, the intermediate sheet is not limited to such a shape, and may have any shape and size in plan view. Therefore, for example, the intermediate sheet having the absorption performance may be disposed only in the region corresponding to the excretion opening corresponding region of the absorbent article.

  In the present embodiment, the intermediate sheet 5 includes a non-skin facing surface of the top sheet 4 (more specifically, a non-skin facing surface of the second nonwoven fabric layer 3) and a hot melt adhesive (not shown). However, the present invention is not limited to such a bonding form, and the intermediate sheet may be bonded to the top sheet by any bonding means such as heat fusion. For example, if the top sheet and the intermediate sheet are bonded by heat sealing, the bonded portion (fused portion) is not easily affected by decomposition due to excrement such as urine, so that the absorbent article may be twisted. It becomes difficult. As a result, such an absorbent article can maintain a good wearing feeling even when wet.

  The sheet-like member constituting the intermediate sheet is not particularly limited, and any sheet-like member can be employed according to desired characteristics (for example, cushioning properties, strength, absorbability, etc.). Examples of the sheet-like member that can be used as the intermediate sheet include a hydrophobic nonwoven fabric and an absorbent sheet. If the intermediate sheet is made of a hydrophobic nonwoven fabric, the absorbent article (specifically, the surface sheet or absorbent sheet of the absorbent article) absorbs liquid excrement such as urine and gets wet. The absorbent article is difficult to twist and it is easy to maintain a good wearing feeling. On the other hand, when the intermediate sheet is composed of an absorbent sheet, liquid excretion that has not been absorbed by the surface sheet and permeated through the surface sheet can be absorbed and retained in the intermediate sheet. Leakage from the absorbent article, liquid return, and the like can be suppressed, and as a result, a good wearing feeling of the absorbent article can be provided to the wearer more reliably.

  In addition, even if the intermediate sheet is constituted by a sheet-like member having a single layer structure or a multilayer structure using only one of the hydrophobic nonwoven fabric and the absorbent sheet, the laminated structure using the hydrophobic nonwoven fabric and the absorbent sheet in combination. You may be comprised by the sheet-like member which has. By appropriately adjusting the number of layers of the sheet-like member constituting the intermediate sheet, it is possible to easily adjust the strength, cushioning property, absorbability and the like of the absorbent article when wet.

  The hydrophobic nonwoven fabric that can be used as the intermediate sheet is not particularly limited as long as it has hydrophobicity. For example, any nonwoven fabric such as an air-through nonwoven fabric or an airlaid nonwoven fabric can be used. The fiber constituting the hydrophobic nonwoven fabric is not particularly limited as long as it has hydrophobicity. For example, polyolefin fibers such as PE and PP; polyester fibers such as PET; various composites such as core-sheath composite fibers Hydrophobic thermoplastic resin fibers such as fibers can be used, and further, heat-fusible fibers may be included. If the hydrophobic non-woven fabric contains heat-fusible fibers, the rigidity of the intermediate sheet increases due to the fusion of the heat-fusible fibers in the hydrophobic non-woven fabric (that is, the intermediate sheet becomes difficult to twist). It is easy to maintain a good cushioning property, a touch, etc. in the surface sheet, and it becomes easier to secure a good wearing feeling as an absorbent article.

  The absorbent sheet that can be used as the intermediate sheet is not particularly limited as long as it can absorb and retain liquid excreta, and any absorber known in the art can be used. Examples of such an absorbent include those in which an absorbent core made of an absorbent material is covered with a core wrap sheet such as a hydrophilic tissue. Examples of the absorbent material constituting the absorbent core include hydrophilic fibers and superabsorbent polymers. More specifically, cellulose fibers such as pulverized pulp and cotton; regenerated cellulose fibers such as rayon and fibrillar rayon. A semi-synthetic cellulose fiber such as acetate and triacetate; a granular material composed of a superabsorbent polymer such as sodium acrylate copolymer; and a combination of any two or more of these.

Further, the basis weight of the intermediate sheet is not particularly limited, and any basis weight in consideration of desired strength, flexibility, cushioning property, and the like can be adopted. Such basis weight, for example, include a basis weight in the range of ^{20g / m 2 ~200g / m 2} , preferably in the range of ^{30g / m 2 ~100g / m 2} . In addition, when an intermediate sheet consists of a sheet-like member which has a multilayer structure, the total basic weight of the basic weight of each layer should just be in the above-mentioned range.

  Furthermore, the thickness of the intermediate sheet is not particularly limited, and for example, a thickness in the range of 0.01 mm to 8.0 mm can be adopted, but from the viewpoint of strength and flexibility, preferably 0.05 mm to It is in the range of 5.0 mm, more preferably in the range of 0.1 mm to 3.0 mm. In addition, when an intermediate sheet consists of the above-mentioned hydrophobic laminated nonwoven fabric, the total thickness of each layer which comprises the said hydrophobic laminated nonwoven fabric should just be in the above-mentioned range.

  In the absorbent article of the present invention, the intermediate sheet is not an essential component. Therefore, when the absorbent sheet, liquid retention, strength, etc. as the absorbent article are secured by the topsheet, the absorbent sheet is absorbed. The property article can be configured such that the intermediate sheet is omitted in consideration of flexibility and the like.

[Back sheet]
In the panty liner 1 according to the present embodiment, the back sheet 6 is disposed at the position of the non-skin facing surface side Db of the panty liner 1 as shown in FIGS. The liquid impervious sheet functions to prevent the excrement such as urine discharged from the wearer from permeating and prevent the excrement from leaking into the wearer's clothes and the like.

In the present embodiment, the back sheet 6 extends between the first outer peripheral edges E ₁ located at both ends in the longitudinal direction L of the panty liner 1 in plan view, and the width of the panty liner 1. It extends between the second outer peripheral edge portions E ₂ located at both ends in the direction W, and has a vertically long outer shape similar to the outer shape of the panty liner 1. In the absorbent article of the present invention, the back sheet (liquid impervious sheet) is not limited to such a shape, and may have any shape and size in plan view.

  In the present embodiment, the back sheet 6 is joined to the non-skin facing surface of the intermediate sheet 5 by a hot melt adhesive (not shown). However, in the present invention, the back sheet 6 is limited to such a joining form. Instead, the back sheet may be joined to the intermediate sheet (or the top sheet when the absorbent article does not include the intermediate sheet) by any joining means such as heat fusion. For example, if the back sheet is bonded to the intermediate sheet or the top sheet by heat sealing, the bonded portion (fused portion) is hardly affected by decomposition by excrement such as urine. It becomes difficult to occur. As a result, such an absorbent article can maintain a good wearing feeling even when wet.

  The liquid impervious sheet used as the back sheet is not particularly limited as long as it has a predetermined liquid impermeability, for example, a hydrophobic nonwoven fabric, a resin film such as polyethylene or polypropylene having air permeability, Arbitrary liquid-impermeable sheets, such as a laminate in which a nonwoven fabric is bonded to a resin film and a laminated nonwoven fabric such as SMS, can be used. Among these, it is preferable to use a hydrophobic nonwoven fabric in terms of liquid impermeability, flexibility, air permeability, strength when wet (difficulty in bending), and the like. Here, the hydrophobicity of the hydrophobic nonwoven fabric may be hydrophobic so long as it does not absorb the dropped water when water is dropped on the surface of the hydrophobic nonwoven fabric, but it is difficult to leak excrement such as urine. Hydrophobic (so-called water repellency) to the extent that when the water is dropped onto the surface of the hydrophobic non-woven fabric, the dripped water is repelled on the surface of the hydrophobic non-woven fabric to form water droplets. More preferably.

The kind of hydrophobic nonwoven fabric that can be used as the back sheet (liquid-impermeable sheet) is not particularly limited, and for example, any nonwoven fabric such as a spunbond nonwoven fabric, a point bond nonwoven fabric, a melt blown nonwoven fabric, and an SMS nonwoven fabric can be used. Among these nonwoven fabrics, it is preferable to use a nonwoven fabric including an ultrafine fiber layer composed of fibers having a fineness of 1 dtex or less, and it is more preferable to use an SMS nonwoven fabric.
Since the nonwoven fabric including the ultrafine fiber layer is excellent in air permeability and liquid impermeability and has appropriate flexibility, when the nonwoven fabric including such an ultrafine fiber layer is used as a back sheet, the absorbent article The feeling of wearing can be further improved. The lower limit of the fineness of the fibers constituting the ultrafine fiber layer is not particularly limited, but is, for example, about 0.1 dtex.
The SMS nonwoven fabric is a laminated nonwoven fabric having a three-layer structure of spunbond / meltblown / spunbond, and has both air permeability and a certain strength (particularly due to the spunbond layer) ( In particular, because it is a nonwoven fabric that can more effectively suppress the passage of excrement such as urine (by the meltblown layer, which is an ultrafine fiber layer), when used as a back sheet, it has excellent air permeability and difficulty in dripping (especially wet) Leakage of excrement such as urine can be more effectively suppressed.

  The constituent fiber of the hydrophobic nonwoven fabric that can be used as the back sheet is not particularly limited as long as it has hydrophobicity. For example, polyolefin fibers such as PE and PP; polyester fibers such as PET; Hydrophobic thermoplastic resin fibers such as various composite fibers such as fibers can be used.

The basis weight of the back sheet is not particularly limited, and any basis weight considering flexibility, air permeability, liquid impermeability, strength, and the like can be adopted. Such basis weight, for example, include a basis weight in the range of ^{8g / m 2 ~60g / m 2} , preferably in the range of ^{15g / m 2 ~50g / m 2} .

  The thickness of the back sheet is not particularly limited, and for example, a thickness in the range of 0.01 mm to 5.0 mm can be adopted, but from the viewpoint of flexibility, air permeability, liquid impermeability, strength, etc. Preferably it exists in the range of 0.05 mm-3.0 mm.

[First embossed part]
As shown in FIGS. 1 to 3, the panty liner 1 according to the present embodiment has the outer peripheral edge (i.e., the longitudinal direction) at a position away from the outer peripheral edge portion of the panty liner 1 in the planar direction in plan view. The first outer peripheral edge E ₁ located at both ends in the direction L and the second outer peripheral edge E ₂ located at both ends in the width direction W) and the topsheet 4 (liquid permeable sheet) A round seal portion R _S composed of a plurality of dot-like first embossed portions 8 for integrating the intermediate sheet 5 and the back sheet 6 (liquid impermeable sheet) in the thickness direction T of the panty liner 1 is provided. ing. As shown in FIGS. 1 and 2, the round seal portion R _S is arranged side by side so that a plurality of dot-shaped first embossed portions 8 draw a predetermined pattern. The plurality of dot-shaped first embossed portions 8 are the constituent members of the panty liner 1, and the top sheet 4 (liquid permeable sheet), the intermediate sheet 5 and the back sheet 6 (liquid impermeable sheet) are stacked in this order. Using a heated or non-heated embossing means (for example, a pair of pressure rolls, etc.), the both sides of the skin facing surface of the top sheet 4 and the non-skin facing surface of the back sheet 6 are laminated. It is formed by pressing so as to face each other in the thickness direction T. Therefore, the first embossed portion 8 has a relatively higher density than the other portions, and thereby has a relatively high hardness. However, in the panty liner 1 according to the present embodiment, the round seal portion _RS composed of the first embossed portion 8 described above is disposed at a position away from the outer peripheral edge of the panty liner 1 inward in the planar direction. Therefore, the hard first embossed portion 8 is difficult to contact the skin surface of the wearer's thigh, buttocks, etc., and it is difficult to give the wearer a foreign object feeling due to the first embossed portion 8.

Moreover, in the panty liner 1 according to the present embodiment, the round seal portion _RS composed of the first embossed portion 8 is an outer peripheral edge portion of the panty liner 1 in plan view as shown in FIGS. 1 and 2. It is arranged along the whole area. Arranging the round seal portion along the entire outer peripheral edge portion of the absorbent article in this manner is not an essential component in the absorbent article of the present invention, and the round seal portion is the outer peripheral edge of the absorbent article. It is only necessary to be arranged so as to be at least partially along the part, but from the viewpoint of shape retention of the absorbent article and prevention of leakage of excrement, the round seal part is as in the above-described embodiment, It is preferable to arrange | position continuously or intermittently along the whole outer peripheral part of an absorbent article.

Furthermore, in the present embodiment, the round seal portion _RS composed of the first embossed portion 8 described above is arranged side by side so that the plurality of dot-shaped first embossed portions 8 draw a predetermined pattern. In this invention, the arrangement | positioning form of the 1st embossing part which forms a round seal part is not restrict | limited especially as long as it arrange | positions in the position away from the outer peripheral edge part of the absorbent article to the inner side of the plane direction, 1st The embossed portion can be arranged in any form such as a straight line, a curved line, a wavy line, or a zigzag.

  In the present embodiment, each of the first embossed portions 8 forming the round seal portion has a substantially circular plan view shape. However, in the present invention, the individual first embossed portions in plan view. The shape is not particularly limited, and an arbitrary shape such as an ellipse, a triangle, a quadrangle, a star, a straight line, a wavy line, or a geometric figure can be adopted in addition to a circle as in the above-described embodiment. .

  The size of each first embossed part forming the round seal part is not particularly limited as long as the effect of the present invention is not hindered, and the shape retention property of the absorbent article, the leakage prevention property of excrement, the flexibility, etc. Any size considered can be employed.

[Second embossed part]
As shown in FIGS. 1 to 3, the panty liner 1 according to the present embodiment includes a first outer peripheral edge E that extends in a direction parallel to the first direction D ₁ among the outer peripheral edges of the panty liner 1. ₁ and the between (more specifically between the round seal portion R _S is a position separated inward in the planar direction from the first outer peripheral edge portion E ₁ of the panty liner 1, and the round seal portion R _A plurality of dot-like second embossed portions 9 which are disposed at positions separated from the outer side of the planar direction from _S ) and have a smaller planar view area than the first embossed portion 8 described above. Similarly to the first embossed portion 8 described above, the second embossed portion 9 also uses the top sheet 4 (liquid permeable sheet), the intermediate sheet 5 and the back sheet 6 (liquid impermeable sheet) as the panty liner 1. The sheet is formed by pressing in the thickness direction T, and these sheets are integrated in the thickness direction T.

Panty liner 1 according to the present embodiment, the first outer peripheral edge portion E ₁ and the round seal portion R _S above extending in a direction parallel to the first direction D ₁ of the above of the outer peripheral edge of the panty liner 1 Since the second embossed portion 9 is provided between the first nonwoven fabric and the second embossed portion 9 in the vicinity of the outer peripheral edge of the panty liner 1 (that is, in the vicinity of the first outer peripheral edge E ₁ ). It is possible to prevent the end 24 of the layer 2 from rolling up and projecting toward the skin facing surface side Da or projecting outward in the plane direction. It is hard to occur.
Furthermore, since the 2nd embossed part 9 has a planar view area smaller than the 1st embossed part 8 of the round seal | sticker part _RS , the said 2nd embossed part 9 is temporarily a wearer's thigh and buttocks. The surface sheet 4 (liquid permeable sheet) having the above-described specific concavo-convex structure 20 is difficult even if the skin surface is touched by the wearer (ie, it is difficult for the wearer to feel a foreign object). It is possible to maintain the excellent wearing feeling produced by the above.

As described above, the panty liner 1 according to the present embodiment has an outer shape that is curved so that the first outer peripheral edge E ₁ protrudes outward in the longitudinal direction L (second direction D ₂ ) in plan view. The plurality of dot-like second embossed portions 9 described above are arranged along the curved outer shape of the first outer peripheral edge E ₁ . When the second embossed portion is arranged so as to follow the curved outer shape of the first outer peripheral edge of the absorbent article, the outer shape of the first nonwoven fabric layer is easily formed as a free end. Even in an absorbent article having a shape (that is, an outer shape in which the first outer peripheral edge is curved so as to protrude outward in the second direction in plan view), the above-described first nonwoven fabric layer It can suppress more reliably that an edge part rolls up and protrudes to the skin opposing surface side, or protrudes to the outward side of a plane direction.

In the present embodiment, the second embossed portion 9, as shown in FIGS. 1 and 2, a direction parallel to the longitudinal direction L (the second direction D ₂₎ of the outer peripheral edge portion of the panty liner 1 It is not arranged between the second outer peripheral edge E ₂ extending to the round seal portion R _S. Although the arrangement form of the second embossed portion is not an essential constituent element in the absorbent article of the present invention, the second embossed portion is the second outer peripheral edge of the absorbent article as in the above-described embodiment. It is preferable that it is not arrange | positioned between a part and a round seal part. If the second embossed portion is not disposed between the second outer peripheral edge portion and the round seal portion of the absorbent article, in the second outer peripheral edge portion where the end of the first nonwoven fabric layer is unlikely to protrude. Since there is no hard part due to the embossed part and it is difficult to give the wearer a foreign body feeling, the excellent wearing feeling of the absorbent article can be more reliably maintained.

In the present invention, the position at which the second embossed portion is disposed is not particularly limited as long as it is a position between the first outer peripheral edge portion and the round seal portion of the absorbent article. As in the embodiment, the absorbent article is disposed at a position away from the first outer peripheral edge of the absorbent article inward in the plane direction and away from the round seal part in the outward direction of the plane. Alternatively, it may be arranged at a position overlapping at least the first outer peripheral edge of the absorbent article in plan view.
Here, FIG. 5 is an enlarged plan view of a main part of a panty liner according to another embodiment of the present invention. As shown in FIG. 5, in another embodiment of the present invention, the second embossed portion 9 is disposed at a position overlapping at least the first outer peripheral edge E ₁ in plan view. When the second embossed portion is arranged at such a position (that is, at least a position overlapping with the first outer peripheral edge portion in plan view), the outer peripheral edge portion of the absorbent article is formed by the second embossed portion. Since the part which becomes the free end of the 1st nonwoven fabric layer in the vicinity can be reduced, the edge part of the 1st nonwoven fabric layer is rolled up, it protrudes to the skin opposing surface side, or it protrudes to the outward side of a plane direction. Can be more reliably suppressed. Thereby, the absorptive article provided with such composition becomes still more difficult to produce the foreign object feeling and the appearance defect by the above-mentioned projection of the end.

  Further, in the present invention, the arrangement form of the second embossed portion is not particularly limited as long as the effect of the present invention is not hindered, and the second embossed portion has a plurality of dots as in the embodiment shown in FIGS. Even if the second embossed portions are arranged side by side so as to draw a predetermined pattern similar to the first embossed portion forming the round seal portion, any shape such as linear, curved, wavy, zigzag, etc. It may be arranged in a form.

  Furthermore, in the present invention, the shape of the individual second embossed portion in plan view is not particularly limited, and may be an ellipse, a triangle, a quadrangle, a star, a straight line in addition to a circle as in the embodiment shown in FIGS. Arbitrary shapes such as shapes, wavy lines and geometric figures can be adopted.

  The size of each second embossed part is not particularly limited as long as it has a smaller planar view area than the individual first embossed part forming the round seal part, and the shape retention and excretion of the absorbent article are not limited. Any size considering the leakage prevention property, flexibility and the like can be adopted. Since each second embossed portion has a smaller planar view area than each first embossed portion that forms the round seal portion, the second embossed portion is supposed to be a thigh, a buttocks, or the like of the wearer. Even if the skin surface is touched, it is difficult for the wearer to detect the hardness (that is, it is difficult to give the wearer a sense of foreign matter), and the surface sheet (liquid permeable sheet) having the above-described specific concavo-convex structure is used. The excellent wearing feeling can be maintained well.

  Hereinafter, still another embodiment of the present invention in which the protruding portions of the top sheet (liquid permeable sheet) and the extending direction of the groove portion are different from those of the above-described embodiments will be described with reference to the drawings. In addition, since structures other than the structure different from each of the above-described embodiments are basically the same as those of the above-described embodiment, description thereof is omitted.

FIG. 6 is a plan view of a panty liner 10 according to still another embodiment of the present invention.
In the panty liner 10 according to this embodiment, the first nonwoven fabric layer 2 of the liquid-permeable sheet constituting the surface sheet is directed toward the skin facing surface side in the thickness direction T of the panty liner 10 as shown in FIG. Projecting and extending continuously in the first direction D ₁ corresponding to the longitudinal direction L of the panty liner 10, and recessed in the thickness direction T toward the non-skin facing surface and in the first direction D ₁ has concave and convex structures 20 that are alternately arranged along the second direction D ₂ corresponding to the width direction W of the panty liner 10. In this panty liner 10 as well, the first nonwoven fabric layer 2 has a length in the second direction D ₂ (that is, the direction corresponding to the width direction W of the panty liner 10) in the stretched state. consisting longer nonwoven than the length of the second direction D ₂ of 3.

Then, as shown in FIG. 6, this panty liner 10 is also arranged along the outer peripheral edge at a position away from the outer peripheral edge of the panty liner 10 inward in the plane direction in a plan view. and round seal portion R _S composed of a plurality of dot-shaped first embossed portion 8 extends in a direction parallel to the first direction D ₁ of the outer peripheral edge portion of the panty liner 10 (i.e., the width of the panty liner 10 A plan view that is located between the first outer peripheral edge E _{1 (} located in each of both end portions in the direction W and extends in the substantially longitudinal direction L) and the round seal portion _RS and is smaller than the first embossed portion 8. A second embossed portion 9 having an area.

Accordingly, also in this panty liner 10, the end 24 of the first nonwoven fabric layer 2 near the outer peripheral edge of the panty liner 10 (that is, near the first outer peripheral edge E ₁ ) is curled by the second embossed portion 9 described above. It can suppress rising and projecting to the skin facing surface side Da or projecting outward in the planar direction, and it is difficult for foreign matter feeling and appearance defects to occur due to the projection of the end 24.

  In addition to the panty liner of each embodiment described above, the present invention can be applied to various absorbent articles such as sanitary napkins and (light) incontinence pads. Further, the absorbent article of the present invention is not limited to the above-described embodiment, and can be appropriately combined and changed within a range not departing from the purpose and spirit of the present invention. In this specification, ordinal numbers such as “first” and “second” are used to distinguish items with the ordinal numbers, and mean the order, priority, importance, etc. of each item. Not what you want.

1 Panty liner (an example of an absorbent article)
2 1st nonwoven fabric layer 20 Uneven structure 21 Convex line part 22 Concave groove part 23 Hollow part 3 2nd nonwoven fabric layer 4 Surface sheet (an example of liquid-permeable sheet)
5 Intermediate sheet 6 Back sheet (an example of a liquid-impermeable sheet)
7 Joining portion 8 First embossed portion 9 Second embossed portion 10 Panty liner (an example of an absorbent article)
11 Release sheet 12 Adhesive part

Claims (8)

A liquid permeable sheet in which a first nonwoven fabric layer forming a skin facing surface and a second nonwoven fabric layer adjacent to the non-skin facing surface of the first nonwoven fabric layer are joined at the joint, and non-skin more than the liquid permeable sheet An absorbent article comprising a liquid-impermeable sheet located on the opposite surface side,
The first nonwoven fabric layer protrudes toward the skin facing surface side in the thickness direction of the absorbent article and continuously extends in the predetermined first direction, and the non-skin facing surface side in the thickness direction And the concave groove portions continuously extending in the first direction have a concavo-convex structure alternately arranged along a second direction orthogonal to the first direction, and at least a part of the concave groove portions. Is joined to the second nonwoven fabric layer at the joint,
Furthermore, the first nonwoven fabric layer is made of a nonwoven fabric that has a length in the second direction in a stretched state that is longer than the length in the second direction of the second nonwoven fabric layer, and can form the ridges.
The absorbent article is disposed so as to be at least partially along the outer peripheral edge at a position away from the outer peripheral edge of the absorbent article inward, and the liquid-permeable sheet and the liquid impervious. A round seal portion comprising a first embossed portion that integrates the adhesive sheet in the thickness direction;
The second outer peripheral portion disposed between a first outer peripheral edge portion extending in a direction parallel to the first direction and the round seal portion and having a smaller planar view area than the first embossed portion. The said absorbent article provided with an embossing part.   The absorbent article of Claim 1 in which the said protruding item | line part has a hollow internal structure.   The said 2nd embossing part is not arrange | positioned between the 2nd outer periphery part extended in the direction parallel to the said 2nd direction among the said outer periphery parts, and the said round seal part. Absorbent article as described in 1.   The absorbent article according to any one of claims 1 to 3, wherein the absorbent article has a vertically long outer shape having a longitudinal direction and a width direction orthogonal to each other, and the first direction is parallel to the width direction. The absorbent article as described.   The first non-woven fabric layer and the second non-woven fabric layer are bonded to each other through an adhesive at the bonding portion, and the adhesive does not exist between the outer peripheral edge portion and the land seal portion. The absorbent article as described in any one of Claims 1-4 which has an agent non-existence area | region.   The absorbent article according to any one of claims 1 to 5, wherein the first nonwoven fabric layer has a larger thickness than the second nonwoven fabric layer.   The absorptive article according to any one of claims 1 to 6, wherein the second embossed portion is disposed at a position overlapping at least the first outer peripheral edge portion in plan view.   The first outer peripheral portion has an outer shape curved so as to protrude outward in the second direction in plan view, and the second embossed portion is the outer shape of the first outer peripheral portion. The absorbent article as described in any one of Claims 1-7 arrange | positioned so that a shape may be followed.

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