JP6261838B1 - Absorbent articles - Google Patents

Abstract

The present invention provides an absorbent article that is less likely to give a wearer a foreign object feeling and is excellent in 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. The first nonwoven fabric layer (2) having the concavo-convex structure (20) and the second nonwoven fabric layer (3) include a liquid-permeable sheet joined at the joint portion (7), and further, the first The end (24) in the second direction of the nonwoven fabric layer (2) is not joined to the second nonwoven fabric layer (3) and is more outward than the outer peripheral edge of the absorbent article in the second direction. Protrudes to the side.

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.

JP 2004-8596 A

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. This makes it difficult to contact the skin surface such as the thigh and the buttocks of the body, and thus has an advantage that it is difficult to give the wearer a feeling of foreign matter or the like due to the crimped portion.
However, the absorbent article disclosed in Patent Document 1 has a ridge part of the ridge groove structure formed in the top sheet and a direction (that is, absorption direction) orthogonal to the direction in which the groove part extends (that is, the longitudinal direction of the absorbent article). The first topsheet, the second topsheet, the intermediate sheet, and the backsheet constituting the absorbent article are bonded by an adhesive at the outer peripheral edge of the absorbent article located at both ends in the width direction of the absorbent article. Since these are integrated and a hard part having a high hardness is formed (see FIGS. 2 and 3 of Patent Document 1), the hard part contacts the skin surface of the wearer's thigh, buttocks, and the like. As a result, the wearer is given a feeling of foreign matter, and a good wearing feeling may not be obtained.

  Then, an object of this invention is to provide the absorbent article which was hard to give a wearer the feeling of a foreign material 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. An absorbent article comprising
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 end of the first nonwoven fabric layer in the second direction is not joined to the second nonwoven fabric layer and protrudes outward from the outer peripheral edge of the absorbent article in the second direction. The absorbent article.

  In the absorbent article according to this aspect 1, the end of the first nonwoven fabric layer in the second direction is not joined to the second nonwoven fabric layer, and is outside the outer peripheral edge of the absorbent article in the second direction. A portion (including an end portion) of the first nonwoven fabric layer that protrudes outward from the outer peripheral edge of the absorbent article in the second direction is simply referred to as “first”. Therefore, when the absorbent article is worn, the protruding part of the first nonwoven layer covers the hard part at the outer peripheral edge of the absorbent article. It is easy to interpose between a person's skin surface and the said hard part, and it can make it difficult to make a wearer sense the hardness of the outer periphery part of an absorbent article (namely, hardness of the hard part in an outer periphery part). . Thereby, the absorbent article of this aspect 1 can make a wearer hard to produce the foreign material feeling resulting from the hardness of the outer periphery part of the said absorbent article, and has the said specific uneven structure as a result. The excellent wearing feeling of the absorbent article exhibited by the liquid permeable sheet 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.

  The absorbent article of this aspect 2 has a hollow internal structure, so that it can obtain a good cushioning property and a softer feel, and has an even better wearing feeling as an absorbent article. Can be obtained.

  In yet another aspect (Aspect 3) of the present invention, in the absorbent article according to Aspect 1 or 2, the outermost peripheral edge part of the absorbent article is configured such that the joint portion located on the outermost side in the second direction is It is the embossing part arrange | positioned in the position away from the inward side.

Since the absorbent article of this aspect 3 is an embossed part arranged at a position away from the outer peripheral edge of the absorbent article to the inward side, the joint located on the outermost side in the second direction, In the first nonwoven fabric layer, a portion adjacent to the embossed portion and the second direction, particularly a portion on the outer side (hereinafter sometimes referred to as an “end region”) stands on the skin facing surface side. It is easy to separate from the outer peripheral edge of the absorbent article (more specifically, from the hard part in the outer peripheral edge). And since the edge part area | region of the 1st nonwoven fabric layer spaced apart from the outer periphery part of the absorbent article in this way can function like a shock absorbing material, a wearer's skin surface is the protrusion of the above-mentioned 1st nonwoven fabric layer. It is further difficult to contact the outer peripheral edge of the absorbent article through the portion, and it is possible to make the wearer more difficult to sense the hardness of the outer peripheral edge of the absorbent article.
Moreover, since the said embossed part is arrange | positioned in the position away from the outer peripheral edge part of the absorbent article inward, the skin surface, such as a wearer's thigh and a buttocks, is a protrusion part of a 1st nonwoven fabric layer. Even if it indirectly contacts the outer peripheral edge of the absorbent article through the outer peripheral edge, there is no hard part due to the embossed part, making it more difficult for the wearer to feel a foreign object. Yes.

  In still another aspect (Aspect 4) of the present invention, in the absorbent article according to any one of Aspects 1 to 3, the first nonwoven fabric layer has a thickness greater than that of the second nonwoven fabric layer.

  Since the 1st nonwoven fabric layer has the thickness larger than the 2nd nonwoven fabric layer, the absorbent article of this aspect 4 ensures the restoring force with respect to the compression in the thickness direction of a protruding item | line part in the said 1st nonwoven fabric layer. And higher cushioning performance can be achieved. Moreover, when the nonwoven fabric with such a high restoring force of a protruding item | line part is used for the said 1st nonwoven fabric layer, the edge part of a 1st nonwoven fabric layer will protrude more easily to the outward side of a planar direction rather than the outer periphery part of an absorbent article. Therefore, the effect that the excellent wearing feeling of the above-mentioned absorbent article can be satisfactorily maintained can be obtained 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 has a greater restoring force than the second nonwoven fabric layer.

  Since the 1st nonwoven fabric layer has the restoring force larger than the 2nd nonwoven fabric layer, the absorbent article of this aspect 5 can exhibit higher cushion performance, and the edge part of the 1st nonwoven fabric layer is Since it becomes easier to protrude outward in the plane direction than the outer peripheral edge of the absorbent article, it is possible to more reliably obtain the effect of being able to maintain the excellent wearing feeling of the above-described absorbent article. .

  In still another aspect (Aspect 6) of the present invention, in the absorbent article according to any one of Aspects 1 to 5, 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 longitudinal direction.

In the absorbent article according to aspect 6, the first direction in which the ridges and the groove part extend is parallel to the longitudinal direction of the absorbent article having a vertically long outer shape, and therefore, urine discharged from the wearer, etc. The excrement can be diffused along the concave groove portion in the longitudinal direction of the absorbent article, and the fit to the skin surface of the wearer can be improved.
Furthermore, the outer peripheral edge part located in the edge part of the width direction of the absorbent article with which the skin surfaces, such as a wearer's thigh and a buttocks, are especially easy to contact is set as the absorbent article of this aspect 6. Since it is covered with the protruding portion of the nonwoven fabric layer and is difficult to come into direct contact with the skin surface of the wearer, even if the extending direction of the ridge and the groove is the longitudinal direction of the absorbent article, It is difficult to give a feeling, and a good wearing feeling can be maintained.

  In still another aspect (Aspect 7) of the present invention, in the absorbent article according to any one of Aspects 1 to 6, the height of the end region located on the outer side of the joint portion in the first nonwoven fabric layer. However, it is smaller than the height of the ridge.

  In the absorbent article of this aspect 7, since the height of the end region in the first nonwoven fabric layer is smaller than the height of the ridges, the protruding portion of the first nonwoven fabric layer is the outer peripheral edge of the absorbent article. Can be more easily covered, and the wearer can reliably prevent the appearance of a foreign object due to the hardness of the outer peripheral edge of the absorbent article.

  ADVANTAGE OF THE INVENTION According to this invention, it is hard to give a wearer a foreign material feeling and can provide the absorbent article excellent in the feeling of wear.

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 plan view of a panty liner 10 according to 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 (second outer peripheral edge portions E ₂ 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.
Furthermore, as shown in FIGS. 1 to 3, the panty liner 1 is positioned at the outer peripheral edge of the panty liner 1 (more specifically, at both ends in the width direction W of the panty liner 1 in a plan view). The first outer peripheral edge E ₁ and the second outer peripheral edge E ₂ positioned at each of both ends in the longitudinal direction L) are arranged along the outer peripheral edge at positions away from the inner side in the plane direction, and A round seal portion comprising an 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; ing. This embossed part 8 is also an example of the “joined part” in the absorbent article of the present invention, like the joined part 7 described later.
In addition, in this embodiment, between the surface sheet 4 and the intermediate sheet 5, and between the intermediate sheet 5 and the back surface sheet 6, in addition to the embossed portion 8 described above, an adhesive layer ( (Not shown).

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. first and convex portions 21 in the direction D ₁ extending continuously, said in the thickness direction T recess toward the non-skin facing side and the first direction corresponding to the longitudinal direction L of and then headed protrude panty liner 1 which has a convex-concave structure 20 arranged alternately with grooves 22 along the second direction D ₂ corresponding to the width direction W 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.
Furthermore, as shown in FIG. 3, the panty liner 1 has an end 24 in the second direction D ₂ of the first nonwoven fabric layer 2 that is not joined to the second nonwoven fabric layer 3 and is panty in the second direction D ₂ . the outer peripheral edge portion of the liner 1 (i.e., the first outer peripheral edge portion E ₁ extending in a first direction D ₁₎ protrudes outward than.

In the panty liner 1 according to the present embodiment, the end 24 in the second direction D ₂ of the first nonwoven fabric layer 2 is not joined to the second nonwoven fabric layer 3 and the panty liner 1 in the second direction D ₂ Since the outer peripheral edge portion (that is, the first outer peripheral edge portion E ₁ extending in the first direction D ₁ ) protrudes outward, the protruding portion P of the first nonwoven fabric layer 2 when the panty liner 1 is worn. _T is, as shown in FIG. 3, so as to cover the hard segment e ₁ at the outer peripheral edge portion of the panty liner 1, easily interposed between the skin surface of the wearer and the hard segment e _1, the wearer It is possible to make it difficult to sense the hardness of the outer peripheral edge portion of the panty liner 1 (that is, the hardness of the hard portion e ₁ in the first outer peripheral edge portion E ₁ ). Thereby, the panty liner 1 can make the wearer less likely to feel a foreign object due to the hardness of the outer peripheral edge of the panty liner 1, and as a result, the liquid permeability having the specific concavo-convex structure 20. The excellent wearing feeling produced by the sheet can be maintained well.

In the present invention, the outer peripheral edge portion of the absorbent article refers to the outer edge of the outer shape of the absorbent article (excluding the protruding portion of the first nonwoven fabric layer) in plan view, for example, in the above-described embodiment. In the panty liner 1, the first outer peripheral edge E ₁ located at each of both ends in the width direction W of the panty liner 1 and the second outer peripheral edge E ₂ located at each of both ends in the longitudinal direction L are provided. Composed. 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.

  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 this embodiment, as shown in FIGS. 1 and 2, the top sheet 4 extends between the second outer peripheral edge portions E ₂ located at both ends in the longitudinal direction L of the panty liner 1 in plan view. It extends over the first outer peripheral edge E ₁ located at each of both ends in the width direction W of the panty liner 1, and has a vertically long outer shape similar 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 longitudinal direction L 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 width direction W of the second non-woven fabric layer. 3 is joined. Here, the first nonwoven fabric layer 2 has an end portion 24 in the second direction D ₂ of the first nonwoven fabric layer 2 that is not joined to the second nonwoven fabric layer 3 and the panty liner 1 in the second direction D ₂ . The outer peripheral edge portion (that is, the first outer peripheral edge portion E ₁ extending in the first direction D ₁ ) is disposed so as to protrude outward, and the protruding portion _PT of the first nonwoven fabric layer 2 is a panty. The hard part e ₁ at the outer peripheral edge of the liner 1 is covered so as to be easily interposed between the skin surface of the wearer and the hard part e ₁ .
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).

Moreover, in the panty liner 1 of the present embodiment, as shown in FIG. 3, the embossed portion 8 in the first nonwoven fabric layer 2 (like the bonded portion 7 is an example of the “bonded portion” in the present invention). Also, the height h of the end region A _E located on the outer side is configured to be smaller than the height H of the ridge 21. Thus, panty liner 1, the protruding portion P _T of the first nonwoven layer 2 described above, the outer peripheral edge portion of the panty liner 1 (more specifically, the hard segment e ₁ of the first outer peripheral edge portion E ₁₎ It is easier to cover, and it is difficult for the wearer to reliably give a foreign object feeling due to the hardness of the outer peripheral edge of the panty liner 1.

  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 having a vertically long outer shape as in the above embodiment. It is preferable to be parallel to the longitudinal direction. When the 1st direction where the protruding line part and the ditch | groove part of a 1st nonwoven fabric layer extend is parallel with respect to the longitudinal direction of an absorbent article, excrement, such as urine discharged | emitted from the wearer, is along the said ditch | groove part. In addition to being able to diffuse in the longitudinal direction of the absorbent article, the fit to the wearer's skin surface can be improved. Further, the outer peripheral edge portion positioned on an end portion in the width direction of the easy absorbent article the skin surface, such as thighs and groin of the wearer is particularly contact (first outer peripheral edge portion E in the above embodiment ₁₎ Since it is difficult to come into direct contact with the skin surface of the wearer because it is covered by the protruding portion of the first nonwoven fabric layer, the wearer even if the extending direction of the ridge and the groove is the longitudinal direction of the absorbent article It is difficult to give a feeling of foreign matter to the skin, and a good wearing feeling can be maintained.

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 large restoring force of a protruding item | line part is used for a 1st nonwoven fabric layer, it will become easy to protrude the edge part of a 1st nonwoven fabric layer to the outward side of a planar direction rather than the outer-periphery edge part of an absorbent article. For this reason, an excellent wearing feeling of the absorbent article can be obtained more reliably.

  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).

  Moreover, in this invention, it is preferable that the 1st nonwoven fabric layer has a larger restoring force than a 2nd nonwoven fabric layer. When the first nonwoven fabric layer has a restoring force greater than that of the second nonwoven fabric layer, it can exhibit higher cushioning performance as a surface sheet, and the end of the first nonwoven fabric layer is the outer periphery of the absorbent article. Since it becomes easy to protrude to the outward side of a plane direction rather than a part, the outstanding wearing feeling can be obtained more reliably.

  Here, the restoring force of the first nonwoven fabric layer and the second nonwoven fabric layer is evaluated by the bending resistance (mm) measured in accordance with the “45 ° cantilever method” defined in JIS L 1096 “General Textile Test Method”. be able to. Such bending resistance is obtained by cutting a strip-shaped sample of a predetermined size (for example, 25 mm × 200 mm, 25 mm × 140 mm, etc.) from the nonwoven fabric constituting the nonwoven fabric layer to be evaluated for restoring force, and cutting the strip-shaped sample into Daiei Co., Ltd. It can be obtained by setting in a cantilever bending resistance test apparatus (model: CAN-1MCA) manufactured by Kagaku Seiki Seisakusho and measuring under predetermined measurement conditions (moving speed: 5 mm / sec). The measurement of the bending resistance is performed five times, and the average value is adopted as the bending resistance (mm) for restoring force evaluation.

  In addition, the means in particular which implement | achieves the structural requirement that a 1st nonwoven fabric layer has a restoring force larger than a 2nd nonwoven fabric layer is not restrict | limited, As mentioned above, the thickness of a 1st nonwoven fabric layer is larger than a 2nd nonwoven fabric layer. In addition, the density, basis weight, constituent fibers, and the like of each nonwoven fabric layer may be adjusted so that the rigidity (flexibility) of the first nonwoven fabric layer is greater than that of the second nonwoven fabric layer.

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 addition, the 1st nonwoven fabric layer 2 and the 2nd nonwoven fabric layer 3 mutually also in the embossing part 8 which integrates the 1st nonwoven fabric layer 2, the 2nd nonwoven fabric layer 3, the intermediate sheet 5, and the back surface sheet 6 other than the junction part 7. It is joined.
And in this embodiment, the 2nd nonwoven fabric layer 3 has a substantially flat structure, and is formed with the nonwoven fabric which has predetermined | prescribed 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. The joint 7 is an example of the “joint” in the present invention, like the embossed part 8.

  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, 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, the means for joining the first nonwoven fabric layer and the second nonwoven fabric layer is not limited to the above-mentioned adhesive or the like, for example, pressing means such as heating or non-heating embossing or ultrasonic welding. Any joining means such as heat fusion means can be used. For example, when the first nonwoven fabric layer and the second nonwoven fabric layer are joined by heat fusion means, the joined portion (fused portion) is hardly affected by decomposition by excrement such as urine. Even when moistened with excrement, 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.

Further, in the above-described embodiment, the joint portion located on the outermost side in the second direction D ₂ is formed by the embossed portion 8 disposed at a position away from the outer peripheral edge portion of the panty liner 1 toward the inner side. Is formed. Panty liner 1, the junction portion located on the most outer side in the second direction D ₂ is formed by the embossed portion 8 from the outer peripheral edge portion disposed at a position spaced inwardly of the panty liner 1 In the first nonwoven fabric layer 2, the portion adjacent to the embossed portion 8 and the second direction D ₂ , particularly the outer side portion (that is, the end region A _E ) stands on the skin facing surface side Da. Thus, it is easy to separate from the outer peripheral edge of the panty liner 1 (more specifically, from the hard part e _{1 at the} outer peripheral edge). And since the edge part area | region _AE of the 1st nonwoven fabric layer 2 spaced apart from the outer periphery part of the panty liner 1 in this way can function like a shock absorbing material, a wearer's skin surface is the above-mentioned 1st nonwoven fabric. The outer peripheral edge portion of the panty liner 1 is hardly contacted via the protruding portion _PT of the layer 2, and it is possible to make the wearer more difficult to sense the hardness of the outer peripheral edge portion of the panty liner 1. Furthermore, since the said embossed part 8 is arrange | positioned in the position away from the outer peripheral edge part of the panty liner 1 to the inward side, skin surfaces, such as a wearer's thigh and a buttocks, are the 1st nonwoven fabric layers 2. Even if the outer peripheral edge of the panty liner 1 is indirectly contacted via the projecting part _PT , there is no hard part due to the embossed part 8 at the outer peripheral edge, and the wearer feels a foreign object. It is harder to give.

[Embossed part]
Next, the embossed portion 8 will be described in detail.
As shown in FIGS. 1 to 3, the panty liner 1 according to the present embodiment has the outer peripheral edge (i.e., the width) at a position away from the outer peripheral edge 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 W and the second outer peripheral edge E ₂ located at both ends in the longitudinal direction L) and the topsheet 4 (liquid permeable sheet) A round seal portion comprising a plurality of dot-like 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. As shown in FIG. 1 and FIG. 2, the round seal portion is arranged side by side so that a plurality of dot-like embossed portions 8 draw a predetermined pattern. The plurality of dot-like embossed portions 8 are joined by stacking a top sheet 4 (liquid permeable sheet), an intermediate sheet 5 and a back sheet 6 (liquid impermeable sheet) in this order, which are constituent members of the panty liner 1. Using the heated or non-heated embossing means (for example, a pair of pressure rolls or the like), the laminated body is made thick on both the skin facing surface of the top sheet 4 and the non-skin facing surface of the back sheet 6. It is formed by squeezing so as to face each other in the direction T. Therefore, the embossed portion 8 has a relatively higher density than the other portions, and thus the hardness is also relatively hard. However, the panty liner 1 according to the present embodiment is hard because the round seal portion including the above-described embossed portion 8 is disposed at a position away from the outer peripheral edge portion of the panty liner 1 inward in the planar direction. The hard embossed portion 8 is less likely to contact the skin surface of the wearer's thigh, buttocks, etc., and it is difficult to give the wearer a feeling of foreign matter due to the embossed portion 8.

  Moreover, in the panty liner 1 according to the present embodiment, the round seal portion including the above-described embossed portion 8 extends along the entire outer peripheral edge portion of the panty liner 1 in a plan view as shown in FIGS. 1 and 2. Are arranged. 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.

  Further, in the present embodiment, the round seal portion composed of the above-described embossed portion 8 is arranged side by side so that a plurality of dot-like embossed portions 8 draw a predetermined pattern. The arrangement form of the embossed part forming the part is not particularly limited as long as the embossed part is arranged at a position distant from the outer peripheral edge part of the absorbent article to the inner side in the plane direction. Arbitrary forms such as wavy lines and zigzags can be used.

  Further, in the present embodiment, each embossed portion 8 forming the round seal portion has a substantially circular plan view shape, but in the present invention, the plan view shape of the individual embossed portion is particularly The shape is not 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 the circle as in the above-described embodiment.

  The size of each embossed part forming the round seal part is not particularly limited as long as the effect of the present invention is not impaired, and the shape retention property of the absorbent article, the leakage prevention property of excrement, flexibility and the like are taken into consideration. Any size can be employed.

[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 second outer peripheral edges E ₂ 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 first outer peripheral edge portions E ₁ 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 second outer peripheral edges E ₂ 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 first outer peripheral edge portions E ₁ 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.

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

FIG. 4 is a plan view of a panty liner 10 according to 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 top sheet is directed to 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 width direction W of the panty liner 10, and recessed in the thickness direction T toward the non-skin facing surface and in the first direction D _The concave and convex groove portions 22 extending continuously to ₁ have the concavo-convex structure 20 alternately arranged along the second direction D ₂ corresponding to the longitudinal direction L 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 longitudinal direction L of the panty liner 10) in the stretched state. consisting longer nonwoven than the length of the second direction D ₂ of 3.

Then, the panty liner 10 is also the first nonwoven layer 2, the end portion in the second direction D ₂ of the first nonwoven fabric layer 2 is not joined to the second nonwoven fabric layer 3 and in the second direction D ₂ the outer peripheral edge portion of the panty liner 10 (i.e., the first outer peripheral edge portion E ₁ extending in a first direction D ₁₎ than is disposed so as to protrude outward side, the first projecting portion of the nonwoven fabric layer 2 The hard part of the outer peripheral edge of the panty liner 10 is covered so as to be easily interposed between the skin surface of the wearer and the hard part. Thus, even in the panty liner 10, it is possible to make it difficult to sense the hardness of the outer peripheral edge portion of the panty liner 10 (i.e., the hardness of the hard portion in the first outer peripheral edge portion E ₁₎ to the wearer, such A feeling of foreign matter caused by the hardness of the outer peripheral edge (specifically, a feeling of foreign matter on the wearer's abdomen side portion and back portion (back) side portion where both ends in the longitudinal direction L of the panty liner 10 can contact). It can be made difficult for the wearer, and as a result, the excellent wearing feeling exhibited by the liquid-permeable sheet having the specific uneven structure 20 can be maintained well.

  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 part 22 Concave groove part 23 Hollow part 24 End 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 joints (example of joints)
8 Embossed part (an example of joint)
10 Panty liner (an example of an absorbent article)
11 Release sheet 12 Adhesive part A _E edge part _PT Projection part

Claims (7)

The absorbent article includes 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,
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 end of the first nonwoven fabric layer in the second direction is not joined to the second nonwoven fabric layer and protrudes outward from the outer peripheral edge of the absorbent article in the second direction. The absorbent article.   The absorbent article of Claim 1 in which the said protruding item | line part has a hollow internal structure.   The said junction part located in the outermost side in the said 2nd direction is an embossing part arrange | positioned in the position away | separated to the inner side from the said outer periphery part of the said absorbent article. Absorbent articles.   The absorptive article according to any one of claims 1 to 3 in which said 1st nonwoven fabric layer has thickness larger than said 2nd nonwoven fabric layer.   The absorbent article according to any one of claims 1 to 4, wherein the first nonwoven fabric layer has a greater restoring force than the second nonwoven fabric layer.   6. The absorbent article according to claim 1, 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 longitudinal direction. The absorbent article as described.   The absorptivity as described in any one of Claims 1-6 whose height of the edge part region located in the outer side rather than the said junction part in a said 1st nonwoven fabric layer is smaller than the height of the said protruding item | line part. Goods.

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