KR102346040B1 - absorbent article - Google Patents

Abstract

An object of the present invention is to provide an absorbent article that is less prone to foreign body feeling or poor appearance and excellent in wearing comfort. The absorbent article of the present invention has a specific concave-convex structure ( 20) comprising a liquid-permeable sheet in which the first nonwoven fabric layer 2 and the second nonwoven fabric layer 3 are joined together at a joint portion 7, and the absorbent article has an outer peripheral edge of the absorbent article. a round seal portion comprising a first embossed portion (8) disposed inwardly away from the A second embossed portion 9 having a planar view area smaller than that of the first embossed portion 8 is provided.

Description

absorbent article

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, and sanitary napkins have been required to have the ability to quickly absorb liquid excretion such as urine and menstrual blood and keep them from leaking out. However, it is required to have excellent fit properties and fit to the wearer's body.

For example, Patent Document 1 discloses an absorbent article in which a plurality of sheets are superimposed and vertically elongated with both left and right edge portions, front edge portions, and rear edge portions extending in the longitudinal direction. In a range of a predetermined length extending in the longitudinal direction across the transverse centerline, a plurality of first group pressing portions are provided inside the both side edge portions, and the plurality of first group pressing portions are spaced apart from each other at predetermined intervals. Disclosed is an absorbent article in which non-compression regions extending along the arrangement direction of a plurality of crimping sections are provided on both sides of the rows formed by the crimping sections, respectively, arranged in a line along the shape of the both side edges. As in the absorbent article disclosed in Patent Document 1, if a plurality of crimping portions such as a round seal portion are provided inside the outer peripheral edge of the absorbent article, the hard crimped portion is difficult to contact with the skin surface such as the wearer's thighs, There is an advantage in that it is difficult to give the wearer a feeling of a foreign body by the crimping portion.

Patent Document 1: Japanese Patent Laid-Open No. 2004-8596

On the other hand, in order to improve the flexibility and touch feeling of the absorbent article to obtain a better fit, as a top sheet of an absorbent article, it protrudes from the thickness direction of the absorbent article toward the skin-facing surface side and extends continuously in a predetermined first direction. Having a concave-convex structure alternately arranged in a second direction orthogonal to the first direction with convex portions and concave groove portions recessed toward the skin non-facing surface side in the thickness direction and continuously extending in the first direction; A first nonwoven fabric which together forms a skin-facing surface of the absorbent article, and a second nonwoven fabric adjacent to the skin-non-facing surface of the first nonwoven fabric and joined to the concave groove portion of at least a portion of the first nonwoven fabric, A technique using a specific liquid-permeable sheet is being studied.

However, when such a technique is applied to the absorbent article disclosed in Patent Document 1 described above, since a plurality of crimping portions such as a round seal portion are provided inside the outer peripheral edge of the absorbent article, among the outer peripheral edge of the absorbent article, the top sheet At the outer periphery located at the end in the second direction orthogonal to the first direction in which the convex ribs extend (in particular, when the outer periphery located at the end in the second direction is formed in a curved shape), the first 1 at least a part of the end of the nonwoven fabric is formed as a free end (that is, an end that is not fixed) and discarded, and such an end protrudes outward in the skin-facing surface side or planar direction of the absorbent article (see Fig. 4); There exists a possibility that problems, such as a feeling of giving a foreign body to a wearer, and a feeling of wearing falls, or the external appearance as an absorbent article worsening existed.

Accordingly, an object of the present invention is to provide an absorbent article which is less likely to cause foreign body feeling and poor appearance as described above and is excellent in wearing comfort.

One aspect (Aspect 1) of the present invention provides 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 skin-non-facing surface of the first nonwoven fabric layer are joined at a joint portion; An absorbent article comprising a liquid-impermeable sheet located on a non-skin-facing side of the liquid-permeable sheet, the absorbent article comprising:

The first nonwoven fabric layer includes a convex portion protruding toward the skin-facing surface side in the thickness direction of the absorbent article and continuously extending in a predetermined first direction, and recessed toward the non-skin-facing surface side in the thickness direction, The concave groove portions continuously extending in the first direction have a concave-convex structure alternately arranged along a second direction orthogonal to the first direction, and at least a portion of the concave groove portions in the joint portion of the second nonwoven fabric connected to the layer,

In addition, the first nonwoven layer has a length in the second direction in an extended state is longer than a length in the second direction of the second nonwoven fabric layer, and consists of a nonwoven fabric capable of forming the ridges,

the absorbent article is disposed so as to at least partially follow the outer peripheral edge at a position away from the outer peripheral edge of the absorbent article inward, and a first first for integrating the liquid-permeable sheet and the liquid-impermeable sheet in the thickness direction A round seal part consisting of an embossing part, and

a second embossed portion disposed between the first outer peripheral edge portion extending in a direction parallel to the first direction among the outer peripheral edge portions and the round seal portion and having a smaller planar area than the first embossed portion It is the said absorbent article provided with.

The absorbent article of this aspect 1 is disposed between a first outer peripheral edge portion extending in a direction parallel to the first direction among the outer peripheral edge portions and the round seal portion, and is larger than the first embossed portion of the round seal portion. Since the second embossed portion having a small planar area is provided, the end of the first nonwoven fabric layer in the vicinity of the outer peripheral edge of the absorbent article is rolled up by the second embossed portion and protrudes toward the skin-facing surface side, or , can be suppressed from protruding outward in the planar direction, and it is possible to make it difficult to produce a feeling of foreign matter or poor appearance due to the protrusion of such an end portion.

Further, in the absorbent article of Embodiment 1, since the above-described second embossed portion has a smaller planar view area than the first embossed portion of the round seal portion, for example, the second embossed portion is applied to the skin surface such as the wearer's thigh. Even when touched, the hardness is hardly perceived by the wearer (that is, it is difficult to give a foreign feeling to the wearer), and the excellent wearing comfort exhibited by the liquid-permeable sheet having the specific uneven structure can be maintained well.

Moreover, in another aspect (aspect 2) of this invention, in the absorbent article of the said aspect 1, the said protrusion part has a hollow internal structure.

In the absorbent article of aspect 2, since the ridges of the first nonwoven fabric layer have a hollow internal structure, good cushioning properties and a more flexible feel can be obtained, and a more excellent wearing feeling as an absorbent article can be obtained.

In another aspect (Aspect 3) of the present invention, in the absorbent article according to Aspect 1 or 2, a second outer peripheral edge portion extending in a direction parallel to the second direction among the outer peripheral edge portions and the round seal portion Between them, the said 2nd embossing part is not arrange|positioned.

In the absorbent article of aspect 3, the second embossed portion is not disposed between the second outer peripheral edge portion extending in a direction parallel to the second direction among the outer peripheral edge portions and the round seal portion, In the second outer peripheral edge portion in which the end portion of the first nonwoven fabric layer is less likely to protrude, there is no hard portion due to the embossing portion, which makes it difficult to give the wearer a sense of foreign body. Thereby, the absorbent article of this aspect 3 can maintain the outstanding wearing comfort more reliably.

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

In the absorbent article of this aspect 4, the first direction in which the ridges of the first nonwoven fabric layer extend is parallel to the width direction of the absorbent article having a longitudinally elongated outer shape, and the protrusion of the end of the first nonwoven fabric layer described above Since the first outer periphery that is likely to occur becomes the outer periphery of the end in the longitudinal direction of the absorbent article, the outer periphery of the end in the width direction of the absorbent article that the wearer's thighs and groin are easily in contact with, The protrusion of the edge part of the 1st nonwoven fabric layer is difficult to occur, and the foreign body feeling by the protrusion of such edge part is made hard to arise. Thereby, the absorbent article of this aspect 4 can maintain the above-mentioned outstanding wearing comfort more reliably.

Moreover, when the absorbent article of this aspect 4 further includes the structure of aspect 3 mentioned above, between the 2nd outer peripheral edge part of the edge part in the width direction of an absorbent article, and the said round seal part, the above-mentioned 2nd M Since the boss part is not disposed, in this absorbent article, there is no hardness hard part by the embossing part on the second outer peripheral edge part of the end in the width direction of the absorbent article which the wearer's thigh or groin easily comes into contact with. This makes it difficult to more reliably give the wearer a sense of foreign body.

In 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 joined through an adhesive at the joint portion, while the Between the outer peripheral edge portion and the round seal portion, there is an adhesive-free region in which the adhesive is not present.

Since the absorbent article according to the fifth aspect has, between the outer peripheral edge portion and the round seal portion, an adhesive non-existent region in which an adhesive bonding the first nonwoven fabric layer and the second nonwoven fabric layer does not exist, the wearer's In the vicinity of the outer peripheral edge portion, which is easy to come into contact with the skin surface, it is difficult for the wearer to perceive the hardness of the joint portion by the adhesive, and it may be difficult to give the wearer a feeling of a foreign body or the like.

In still another aspect (Aspect 6) of this invention, in the absorbent article in any one of Aspects 1-5, the said 1st nonwoven fabric layer has a larger thickness than the said 2nd nonwoven fabric layer.

In the absorbent article of this aspect 6, since the said 1st nonwoven fabric layer has a larger thickness than the said 2nd nonwoven fabric layer, in the said 1st nonwoven fabric layer, the restoring force with respect to the compression of the thickness direction of a ridge part can be ensured, , higher cushioning performance can be exhibited. In addition, when such a nonwoven fabric having a large restoring force of the ridges is used for the first nonwoven fabric layer, the end of the first nonwoven fabric layer is usually rolled up and protrudes toward the skin-facing surface side or is easily protruded outward in the planar direction. However, since the absorbent article of this aspect 6 is equipped with the 2nd embossing part mentioned above, the protrusion of the edge part of such a 1st nonwoven fabric layer can be suppressed.

Therefore, the absorbent article of this aspect 6 can make it difficult to produce the foreign body feeling and appearance defect by the protrusion of the edge part mentioned above, exhibiting higher cushioning performance.

In still another aspect (Aspect 7) of this invention, in the absorbent article in any one of Aspects 1-6, the said 2nd embossing part is arrange|positioned at the position which overlaps with the said 1st outer peripheral edge part at least in planar view. has been

In the absorbent article of this aspect 7, since the said 2nd embossing part is arrange|positioned at the position which overlaps with the said 1st outer peripheral edge part at least, this 2nd embossing part uses the said 2nd embossing part in the vicinity of the outer peripheral edge part of an absorbent article. The portion serving as the free end of the first nonwoven fabric layer can be reduced, and it can be more reliably suppressed that the end portion of the first nonwoven fabric layer is rolled up and protrudes toward the skin-facing surface side or protrudes outward in the planar direction. . Thereby, in the absorbent article of this aspect 7, it can make it more difficult to produce the feeling of foreign material by the protrusion of the edge part mentioned above, and an appearance defect.

In 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 portion is curved so as to protrude outward in the second direction in plan view. It has a shape, and the second embossed portion is disposed so as to conform to the outer shape of the first outer peripheral edge portion.

In the absorbent article of aspect 8, since the above-described second embossed portion is disposed so as to follow the curved outer shape of the first outer peripheral edge portion of the absorbent article, the end portion of the first nonwoven fabric layer is easily formed as a free end. Even for an absorbent article having a shape (that is, an outer shape in which the first outer peripheral edge portion is curved so as to protrude outward in the second direction in plan view), the end portion of the first nonwoven fabric layer is rolled up and faces the skin Projecting to the side or projecting outward in the planar direction can be more reliably suppressed. Thereby, in the absorbent article of this aspect 8, it can make it difficult to produce more reliably the feeling of foreign material and the appearance defect by the protrusion of the edge part mentioned above.

Advantageous Effects of Invention According to the present invention, it is possible to provide an absorbent article having an excellent feeling of wear and less feeling of foreign matter or poor appearance as described above.

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 a panty liner 1 according to an embodiment of the present invention.
Fig. 3 is a partial cross-sectional view taken along line III-III in Fig. 2 of the panty liner 1 according to the embodiment of the present invention.
Fig. 4 is a partial cross-sectional view corresponding to Fig. 3 of the panty liner 1' without the second embossing portion.
Fig. 5 is an enlarged plan view of a main part of a panty liner according to another embodiment of the present invention.
6 is a plan view of a panty liner 10 according to still another embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of the absorbent article of this invention is demonstrated in detail, referring drawings. In addition, in this specification, unless otherwise stated, "an object placed on a horizontal surface in an unfolded state (eg, absorbent article, top sheet (liquid-permeable sheet), etc.) is viewed from the upper side in the vertical direction in the thickness direction of the object. ' is simply referred to as "planar view".

The various directions used in the present specification are as follows, unless otherwise specified.

In this specification, "longitudinal direction" refers to "the longitudinal direction of the longitudinally long object (eg, absorbent article, topsheet (liquid-permeable sheet), etc.) in plan view", and "width direction" refers to "planar It points to the short direction (shorter direction) of the length of the vertically long object in the city, and the "thickness direction" refers to "the direction perpendicular to the object placed on the horizontal plane in the expanded state", these longitudinal and width directions and the thickness direction have a mutually orthogonal relationship, respectively. In addition, in this specification, "planar direction" refers to "a direction in which the plane of a substantially sheet-like object (eg, absorbent article, topsheet (liquid-permeable sheet), etc.) in a planar view extends (i.e., horizontal direction)" , the plane direction and the thickness direction have a mutually orthogonal relationship.

In addition, in this specification, "in the longitudinal direction of a vertically long object, _{relatively proximal to the longitudinal central axis C W} located in the center of the longitudinal direction of the object and extending in the width direction" is defined as "the longitudinal direction". _{The inner side of” and “the distal side relative to the longitudinal central axis C W} in the longitudinal direction of the longitudinally long object” is referred to as “the outward side in the width direction”. _{Similarly, "in the width direction of a vertically long object, relatively proximal to the width direction central axis C L} located at the center of the width direction of the object and extending in the longitudinal direction" is "inward in the width direction" _{, and “a side relatively distal to the central axis C L} in the width direction in the width direction of the longitudinally long object” is referred to as an “outer side in the width direction”. In addition, in this specification, "in the planar direction of a substantially sheet-shaped object, _{relatively proximal to the intersection of the longitudinal central axis C W} and the width direction central axis C _L of the object" is defined as "in the planar direction." in the planar direction of the object in said inward side ", and" substantially sheet-like, in a relatively distal "with respect to the intersection point of the center axis (C _W) and a width of the central axis (C _L) direction, length direction of the object" plane direction It's called 'outside'.

And, in this specification, unless otherwise specified, in the thickness direction of the absorbent article, "at the time of wearing the absorbent article, relatively proximal with respect to the wearer's skin surface" is referred to as "skin surface side", and "the side of the absorbent article" At the time of wearing, the relatively distal side with respect to the wearer's skin surface is referred to as "non-skin surface side". Here, "at the time of wearing" means from the time when the wearer wears the absorbent article (that is, the time when a usable state is formed) while maintaining the state (while wearing).

In addition, in this specification, the "surface on the skin-facing side" and "surface on the non-skin-facing side" of various members constituting the absorbent article (eg, topsheet (liquid-permeable sheet), backsheet (liquid-impermeable sheet), etc.) are simply referred to as "skin-facing surface" and "skin-non-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 a panty liner 1 in FIG. It is a partial cross-sectional view along line III-III.

1 and 2, the panty liner 1 according to the embodiment of the present invention has a longitudinally elongated external shape having a longitudinal direction L and a width direction W in plan view, , more specifically, the outer peripheral edge portions (the first outer peripheral edge portion (E ₁ in FIGS. 1 and 2 ) located at both ends in the longitudinal direction L) toward the outward side in the longitudinal direction L, respectively It is curved so that it may protrude, and has a longitudinally elongate external shape in which the substantially central part of the said longitudinal direction L is slightly constricted toward the inner side in the width direction W.

In the present invention, the external shape of the absorbent article is not limited to this aspect, and any external shape (eg, rectangular, elliptical, hourglass shape, etc.) can be adopted according to various uses and the like.

1 to 3 , the panty liner 1 according to the present embodiment has a specific concave-convex structure that is located on the skin-facing surface side Da of the panty liner 1 in the thickness direction T and will be described later. A topsheet 4 comprising a liquid-permeable sheet constituted by a first nonwoven fabric layer 2 having (20) and a second nonwoven fabric layer 3 laminated on the first nonwoven fabric layer 2, and a panty liner ( A back sheet 6 made of a liquid-impermeable sheet positioned on the non-skin-facing side Db of 1) and an intermediate sheet 5 positioned between these sheets as a basic configuration, the top sheet 4 The skin-facing surface side (Da) surface (i.e., skin-facing surface) of ) forms the non-skin-facing surface of the panty liner 1 .

Further, in the present embodiment, between the top sheet 4 and the intermediate sheet 5 and between the intermediate sheet 5 and the back sheet 6, respectively, via an adhesive layer (not shown) made of a hot melt adhesive. is connected.

Further, as shown in Fig. 3, on the non-skin-facing surface of the back sheet 6, a plurality of pressure-sensitive adhesives continuously extending in the width direction W are arranged along the length direction L (so-called stripe shape). and an adhesive portion 12 for fixing the worn clothes, and disposed on the surface of the adhesive portion 12 on the non-skin-facing surface side so as to cover substantially the entire surface of the non-skin-facing surface of the back sheet 6 . The release sheet 11 for protecting the adhesive part 12 before use is provided. The panty liner 1 constructed in this way, when worn, peels off the above-described release sheet 11, so that the panty liner 1 is disposed on the non-skin-facing surface of the back sheet 6 for fixing the garment. It is fixed to the inner surface of the wearer's clothing (eg, underwear, etc.) by the part 12, and is worn with the topsheet 4 facing the wearer's skin surface.

The pressure-sensitive adhesive for forming the above-described pressure-sensitive adhesive portion is not particularly limited as long as it can fix the absorbent article to the wearer's clothing, and any pressure-sensitive adhesive containing, for example, a styrenic polymer or the like can be used. Moreover, the arrangement pattern of an adhesive is not specifically limited, either, The adhesive may extend intermittently in the width direction W, and may extend continuously or intermittently in the longitudinal direction L.

In addition, in the panty liner 1 according to the present embodiment, the top sheet 4 includes the first nonwoven fabric layer 2 forming the skin-facing surface of the panty liner 1 and the above-mentioned agent, as shown in FIG. 3 . The second nonwoven fabric layer 3 adjacent to the skin-non-facing surface of the first nonwoven fabric layer 2 consists of a liquid-permeable sheet joined at a joint part 7, and the first nonwoven fabric layer 2 is a panty liner. A convex rib portion 21 protruding toward the skin-facing surface side in the thickness direction T of ( _{1) and continuously extending in the first direction D 1 corresponding to the width direction W of the panty liner 1;} , the concave groove portion 22 dented toward the non-skin-facing surface side in the thickness direction T _{and continuously extending in the first direction D 1} corresponds to the longitudinal direction L of the panty liner 1 . has the concave-convex structures 20 alternately arranged along the second direction D ₂ , and at least a part of the concave groove portions 22 are joined to the second nonwoven fabric layer 3 in the bonding portion 7 . has been In addition, the first nonwoven fabric layer 2, the length of the first direction (D ₁₎ in the extension a state longer than a length in the first direction (D ₁₎ of the second nonwoven fabric layer (3), the It consists of a nonwoven fabric which can form the ridge part 21.

Further, as shown in Figs. 1 to 3, the panty liner 1 is arranged so as to follow the outer peripheral edge at a position away from the outer peripheral edge of the panty liner 1 inward in the planar view, and A first embossed portion 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 . round-sealed portion consisting of 8 of (R _S), and a panty liner (1) (i.e., panty liner (1) extending in a direction parallel to the first direction (D ₁₎ of the outer peripheral edge portion of the length It located in each of both end portions in a direction (L) also being disposed between and extending substantially in the width direction (W)) a first outer edge portion (E ₁₎ and the round-sealed portion (R _S) in addition, the first embossment A second embossed portion 9 having a planar area smaller than that of the portion 8 is provided.

The panty liner 1 according to the present embodiment has a first outer peripheral edge portion E _{1 extending in a direction parallel to the first direction D 1} among the outer peripheral edge portions of the panty liner 1 and the because disposed between a round-sealed portion (R _S) and also be provided with a second embossed portion 9 having a smaller plan view area than the first embossed portion (8) of the round-seal portion (R _S), With the second embossed portion 9 , the end 24 of the first nonwoven fabric layer 2 in the vicinity of the outer peripheral edge of the panty liner 1 (ie, in the vicinity of the first outer peripheral edge E _{1 ).} ) can be suppressed from being rolled up and protruding toward the skin-facing surface side Da or protruding outward in the planar direction, making it difficult to produce a foreign body feeling or poor appearance due to the protrusion of the end portion 24 .

Further, since the panty liner 1, the above-described second embossed portion 9 a will having a smaller plan view area than the first embossed portion (8) of the round-sealed portion (R _S), for example, the second Even if the embossed portion 9 touches the skin surface of the wearer's thigh or groin, its hardness is difficult to be sensed by the wearer (that is, it is difficult to give the wearer a sense of foreign body), and having the specific concave-convex structure 20 The excellent wearing comfort exhibited by the liquid-permeable sheet can be maintained favorably.

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. In FIG. 4, components other than the second embossed portion, that is, , first nonwoven layer 2', second nonwoven layer 3', intermediate sheet 5', back sheet 6', bonding part 7', first embossing part 8', peeling The sheet 11' and the adhesive portion 12' are the same as in the above-described embodiment, respectively.

As shown in Fig. 4, in the panty liner 1' not provided with the second embossed portion as described above, among the outer peripheral edges of the panty liner 1', the convex portion of the first nonwoven fabric layer 2'. _{At the outer peripheral edge portion E′ 1} located at the end of the second direction (ie, the longitudinal direction L of the panty liner 1′) perpendicular to the first direction in which 21′ extends (in particular, the above When the outer peripheral edge portion E' ₁ is formed in a curved shape in plan view), at least a part of the end 24' of the first nonwoven fabric layer 2' is formed as a free end, and this end 24' protrudes toward the skin-facing surface side of the panty liner 1' or outward in the planar direction (in addition, in the embodiment shown in Fig. 4, the end 24' is the panty liner 1') It is an aspect which protrudes outward in the planar direction.), giving a foreign body feeling to a wearer, and there exists a possibility that the wearability may fall, and there exists a possibility that the external appearance as an absorbent article may deteriorate.

Further, in the present invention, the outer peripheral edge of the absorbent article indicates 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 length of the panty liner 1 is It is constituted by a first outer peripheral edge portion E _{1 positioned at each of both ends in the direction L and a second outer peripheral edge portion E 2} positioned at each of both ends in the width direction W. Here, the first outer peripheral edge portion E ₁ is substantially parallel _{to the first direction D 1 in} which the ridge portions 21 of the first nonwoven fabric layer 2 extend among the outer peripheral edges of the panty liner 1 . It is an outer periphery extending in one direction, and the second outer periphery E ₂ is a first, among the outer periphery of the panty liner 1 , from which the convex portion 21 of the first nonwoven fabric layer 2 extends. An outer peripheral edge portion extending in a direction substantially parallel to the second direction D ₂ orthogonal to the direction D _{1 .}

In addition, in the present invention, the ridges and concave grooves of the first nonwoven layer include the highest point of the ridges (that is, the point located on the skin-facing side most in the thickness direction) in the thickness direction of the first nonwoven fabric layer. Located in the middle of the second virtual horizontal plane including the virtual horizontal plane and the lowest point of the concave groove (ie, the point located on the most non-skin-facing side in the thickness direction) (ie, the first virtual horizontal plane and the second virtual horizontal plane) Based on the third virtual horizontal plane (located so that the distance from each is equidistant), the part protruding toward the skin-facing surface side is called a ridge part, and the part recessed toward the skin-non-facing surface is called a concave groove part.

In addition, in this specification, "planar view area" means the area of the external shape (ie, planar view shape) of the object viewed in plan view. Therefore, when the planar shape of the first embossed portion to the second embossed portion is circular, the circular area becomes the planar view area of the first to second embossed portions. In addition, when the planar view shape of the first embossed portion to the second embossed portion is a shape formed by combining a plurality of geometric figures, etc. (that is, a shape in which individual geometric figures etc. are continuously connected), the combined The area of the entire shape becomes the area in plan view, and in the case of a shape formed by aggregation of a plurality of geometric figures etc. without being combined (that is, a shape in which individual geometric figures are not connected but formed by aggregation), the individual geometric figures The area of a shape, such as a figure, becomes the planar area.

Hereinafter, various members 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, the top sheet 4 has a skin-facing surface side Da of the panty liner 1 that can directly contact the wearer's skin surface as shown in FIGS. 1 and 3 . The skin of the first nonwoven fabric layer 2 and the first nonwoven fabric layer 2 disposed at a position of The second nonwoven fabric layer 3 adjacent to the non-facing surface is constituted by a liquid-permeable sheet joined at the bonding portion 7 .

In the present embodiment, the topsheet 4 has, in plan view, a first outer peripheral edge portion ( E _{1 ) while extending between the second outer peripheral edge portions E 2} positioned at each of both ends in the width direction W of the panty liner 1 , the panty liner 1 ) It has the same longitudinally long external shape as the external shape of In addition, in the absorbent article of the present invention, the topsheet (liquid-permeable sheet) is not limited to such a shape, and an arbitrary planar view shape and size can be employed.

In addition, the liquid-permeable sheet used as the topsheet 4 in this embodiment forms the skin-facing surface of the panty liner 1 and the first nonwoven fabric layer 2 having the specific concave-convex structure 20 described above. ) and the second nonwoven fabric layer 3 adjacent to the skin non-facing surface of the first nonwoven fabric layer 2 are constituted by a liquid-permeable sheet joined by the joint portion 7 .

The first nonwoven fabric layer 2 constituting this liquid-permeable sheet, as described above, protrudes from the thickness direction T of the panty liner 1 toward the skin-facing surface side Da, and is _{The ridges 21 continuously extending in the first direction D 1} corresponding to the width direction W, and recessed toward the skin non-facing surface side Db in the thickness direction T, and the first A specific concave-convex structure 20 in which concave groove portions 22 continuously extending in the direction D _{1 are alternately arranged along the second direction D 2} corresponding to the longitudinal direction L of the panty liner 1 . is provided, and at least a part of the concave groove portion 22 is joined to the second nonwoven fabric layer 3 at the joint portion 7 .

Moreover, in this invention, the specific uneven structure provided with the above-mentioned ridge part and concave groove part may be formed in the whole area|region of the 1st nonwoven fabric layer like this embodiment, and may be formed in only a partial area|region.

Moreover, in this embodiment, the said ridge part 21 has the hollow part 23 which the skin non-facing surface of the 1st nonwoven fabric layer 2 faces, as shown in FIG. It is not an essential component for the absorbent article of the present invention that the ridges of the first nonwoven layer have such a hollow internal structure, but if the ridges of the first nonwoven layer have such a hollow internal structure, good cushioning properties and more A soft feel can be obtained, and a more excellent wearing feeling can be obtained as an absorbent article. On the other hand, when the ridges of the first nonwoven fabric layer have a solid internal structure, voids are hardly formed between the first nonwoven fabric layer and the second nonwoven fabric layer, and the skin is non-facing from the skin-facing side of the liquid-permeable sheet. The liquid transfer property to the surface side becomes favorable.

In the present invention, the height of the ridges of the first nonwoven fabric layer is not particularly limited as long as the effects of the present invention are not impaired. For example, it is within the range of 0.01 mm to 6.0 mm, but from the viewpoint of cushioning properties and tactile feel, it is preferably It is in the range of 0.1 mm - 4.0 mm, More preferably, it exists in the range of 0.1 mm - 3.0 mm. Similarly, the depth of the concave groove portion of the first nonwoven fabric layer is not particularly limited as long as it does not impair the effects of the present invention, and is, for example, in the range of 0.01 mm to 6.0 mm, but from the viewpoint of cushioning properties and tactile feel, it is preferably 0.1 It is in the range of mm-4.0 mm, More preferably, it exists in the range of 0.1 mm-3.0 mm. In addition, in the present specification, "height of the ridges" refers to the height to the highest point of the ridges with the second virtual horizontal plane as a reference plane (that is, the distance between the first virtual horizontal plane and the second virtual horizontal plane), , "depth of the concave groove portion" means a depth (ie, a distance between the first virtual horizontal surface and the second virtual horizontal surface) from the first virtual horizontal plane to the lowest point of the concave groove portion as a reference plane.

In the present invention, the widths of the ridges and the concave grooves of the first nonwoven fabric layer (that is, the maximum length in the second direction of the ridges and the concave grooves) are not particularly limited as long as the effects of the present invention are not impaired, for example, Although it exists in the range of 0.1 mm - 15.0 mm, from points, such as cushioning property and a feel, Preferably it exists in the range of 0.5 mm - 10.0 mm, More preferably, it exists in the range of 1.0 mm - 5.0 mm.

Further, in the present invention, the direction in which the ridges and concave grooves of the first nonwoven fabric layer extend, that is, the first direction is not particularly limited, but as in the above-described embodiment, the width of the absorbent article having a longitudinally elongated outer shape It is preferably parallel to the direction. When the first direction in which the ridges and concave grooves of the first nonwoven fabric layer extend is parallel to the width direction of the absorbent article having a longitudinally elongated outer shape, protrusion of the end portion of the first nonwoven fabric layer is likely to occur. 1 Since the outer peripheral edge portion becomes the outer peripheral edge portion of the end portion in the longitudinal direction of the absorbent article, in the outer peripheral edge portion of the end portion in the width direction of the absorbent article that the wearer's thighs and groin easily contact, the first nonwoven fabric layer The protrusion of the end portion is less likely to occur, and the foreign body feeling due to the protrusion of the end portion is less likely to occur. Thereby, the absorbent article provided with such a structure can maintain the above-mentioned outstanding wearing comfort more reliably.

Moreover, in the above-mentioned embodiment, the length of the 1st nonwoven fabric layer 2 _{in the 1st direction D 1} in the extended state (that is, the flat state before forming an uneven structure) is the 2nd nonwoven fabric layer 3 ) is formed of a nonwoven fabric longer than the length in the first direction (D _{1 ), and the specific uneven structure 20} ) is formed by giving Provision of this specific uneven structure 20 may be performed before bonding with the 2nd nonwoven fabric layer 3, and may be performed substantially simultaneously with bonding of the 2nd nonwoven fabric layer 3 .

The nonwoven fabric forming the first nonwoven fabric layer is not particularly limited as long as it has a predetermined liquid permeability, for example, spunlace nonwoven fabric, air through nonwoven fabric, spunbond nonwoven fabric, point bond nonwoven fabric, melt blown nonwoven fabric, and combinations thereof ( For example, any nonwoven fabric such as SMS nonwoven fabric may be used. Among them, a spunlace nonwoven fabric can be suitably used from the viewpoint of excellent flexibility and the like.

In addition, 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 fibers can be used. It is preferable to use Examples of such hydrophilic fibers include cellulose fibers such as cotton and ground pulp; Regenerated cellulose fibers, such as rayon and fibril rayon; Semisynthetic cellulose fibers such as acetate and triacetate; and thermoplastic resin fibers and composite fibers subjected to hydrophilization treatment. Among these, it is preferable to use cellulose fibers, such as cellulose fibers, regenerated cellulose fibers, and semisynthetic cellulose fibers, from the viewpoint of excellent liquid absorption, liquid retention, flexibility, and feel, and in particular, cotton, rayon, or a mixture of these It is preferable to use fibers.

In addition, when the absorbent article is separately provided with an intermediate sheet or absorbent body capable of absorbing and retaining excrement such as urine, or when it is assumed that the target quantity of excretion is small, the first nonwoven fabric layer is In addition to hydrophilic fibers, polyolefin fibers such as polyethylene (PE) and polypropylene (PP); polyester fibers such as polyethylene terephthalate (PET); Hydrophobic thermoplastic resin fibers such as heat-sealable fibers may be included. When the first nonwoven fabric layer contains such thermoplastic resin fibers, the content thereof is not particularly limited, but it is preferably contained in a mass ratio of less than 50% by mass from the viewpoint of ensuring a certain or more absorption performance.

The basis weight of the first nonwoven fabric layer is not particularly limited as long as the effects of the present invention are not impaired, and any basis weight in consideration of liquid absorption, liquid retention, cushioning properties, flexibility, and the like may be employed. As such a basis weight, for example, the basis weight in the range of 5 g/m<2> - 60 g/m<2> is mentioned, Preferably it exists in the range of 10 g/m<2> - 50 g/m<2>. In addition, the basis weight can be measured according to 5.2 of JIS L 1906.

The thickness of the first nonwoven fabric layer is not particularly limited as long as it does not impair the effects of the present invention. For example, a thickness within the range of 0.001 mm to 5.0 mm can be adopted. From these points, Preferably it exists in the range of 0.01 mm - 3.0 mm, More preferably, it exists in the range of 0.05 mm - 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 1st nonwoven fabric layer has a larger thickness than the 2nd nonwoven fabric layer, in the said 1st nonwoven fabric layer, since the restoring force with respect to the compression of the thickness direction of a ridge part can be ensured, higher cushioning performance can be exhibited. In addition, when a nonwoven fabric having such a large restoring force of the ridges is used for the first nonwoven fabric layer, the end of the first nonwoven fabric layer described above is usually rolled up and protrudes toward the skin-facing surface side or tends to protrude outward in the planar direction, Since the absorbent article of this invention is equipped with the 2nd embossing part mentioned above, the protrusion of the edge part of such a 1st nonwoven fabric layer can be suppressed. Therefore, by using such a nonwoven fabric for the 1st nonwoven fabric layer, the absorbent article of this invention can make it hard to produce the feeling of foreign material by the protrusion of the edge part mentioned above, or an appearance defect, while exhibiting higher cushioning performance.

Here, the thickness of various sheets such as the nonwoven fabric used for the first nonwoven fabric layer and the second nonwoven fabric layer and the intermediate sheet and back sheet to be described later is determined from a sample sheet of a predetermined size (for example, 30 mm × 30 mm, etc.) from the sheet to be measured. The cut-out sample sheet is set in an automated compression tester (type: KES FB-3A) manufactured by Katotech Co., Ltd., and the thickness when the pressure on the sample sheet by the measuring terminal of the tester becomes 49 Pa ( mm) can be obtained.

In the above-described embodiment, the second nonwoven fabric layer 3 constituting the liquid-permeable sheet is adjacent to the skin non-facing surface of the first nonwoven fabric layer 2, and at least a portion of the first nonwoven fabric layer 2 has concave grooves ( 22) is joined to the skin non-facing surface at the joint portion (7). In this embodiment, the 2nd nonwoven fabric layer 3 has a substantially flat structure and is formed of the nonwoven fabric which has predetermined liquid permeability. It is not an essential constitutive requirement for the absorbent article of the present invention that the second nonwoven fabric layer has such a substantially flat structure, but if the second nonwoven fabric layer has such a substantially flat structure, a predetermined volume inside the ridges of the first nonwoven fabric layer It is easy to form the hollow part mentioned above, and more excellent cushioning property, softness|flexibility, etc. can be provided to a liquid-permeable sheet|seat, and the even more excellent wearing comfort as an absorbent article can be obtained. On the other hand, if the second nonwoven fabric layer has a structure that enters into the hollow portion of the ridge portion of the first nonwoven fabric layer or a structure that fills the hollow portion, it is difficult to form a void between the first nonwoven fabric layer and the second nonwoven fabric layer, and the liquid-permeable sheet The liquid transfer property from the skin-facing surface side to the non-skin-facing surface side is improved.

The nonwoven fabric forming the second nonwoven fabric layer is not particularly limited as long as it has a predetermined liquid permeability, for example, a tissue made of hydrophilic fibers, a hydrophobic nonwoven fabric, a water repellent nonwoven fabric, and a spunlace nonwoven fabric similar to the first nonwoven fabric layer described above. , air-through non-woven fabric, spun-bonded non-woven fabric, point-bonded non-woven fabric, melt-blown non-woven fabric, and combinations thereof (eg, SMS non-woven fabric, etc.) may be used. Among them, a tissue made of a hydrophilic fiber can be suitably used from the viewpoint of excellent liquid absorption, liquid retention, flexibility, and the like.

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 fibers can be used. 1 It is preferable to use the same hydrophilic fiber as the nonwoven fabric layer. In addition, the 2nd nonwoven fabric layer may contain the thermoplastic resin fiber other than a hydrophilic fiber similarly to the 1st nonwoven fabric layer mentioned above.

The basis weight of the second nonwoven fabric layer is not particularly limited as long as the effects of the present invention are not impaired, and any basis weight in consideration of liquid absorption, liquid retention, cushioning properties, flexibility, and the like can be employed. As such a basis weight, the basis weight in the range of 1 g/m<2> - 50 g/m<2> is mentioned, for example, Preferably it exists in the range of 3 g/m<2> - 40 g/m<2>.

The thickness of the second nonwoven fabric layer is not particularly limited as long as it does not impair the effects of the present invention, and for example, a thickness within the range of 0.001 mm to 3.0 mm can be employed, but the thickness of the second nonwoven fabric layer is not limited to liquid absorption, liquid retention, cushioning properties, flexibility, and the like. From this point, it 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.

[copula]

In the embodiment described above, the panty liner 1 has, as shown in Figs. 1 and 3, the first nonwoven fabric layer 2 (more specifically, the concave groove portions 22 of the first nonwoven fabric layer 2). and the second nonwoven fabric layer 3 are bonded to each other at the bonding portion 7 via an optional adhesive (not shown) such as a hot melt adhesive. Thus, when the 1st nonwoven fabric layer 2 and the 2nd nonwoven fabric layer 3 are joined by the bonding part 7, since it becomes difficult to produce a position shift or deformation|transformation between these respective layers, the absorption performance of an absorbent article and The wearing comfort can be more stable.

Further, in the panty liner 1 of the present embodiment, the first nonwoven fabric layer 2 and the second nonwoven fabric layer 3 are joined through the adhesive at the bonding portion 7, while the panty liner 1 is between the outer circumferential edge portion and the round-sealed portion _(S R), it has a non-adhesive area, the adhesive is present it does not exist. If the absorbent article has such a position, that is, between the outer peripheral edge portion of the absorbent article and the round seal portion, an adhesive-free region in which an adhesive bonding the first nonwoven fabric layer and the second nonwoven fabric layer is not present, the surface of the wearer's skin In the vicinity of the easy-to-reach outer peripheral edge portion, since the hardness of the joint portion by the adhesive is difficult to be perceived by the wearer, it is possible to further make it difficult to give the wearer a feeling of a foreign substance or the like.

In the present invention, the arrangement pattern of the adhesive used for bonding the first nonwoven fabric layer and the second nonwoven fabric layer is not particularly limited, and for example, a plurality of spiral types extending in the first direction and/or the second direction in plan view. , an omega type, a broken line type, a zigzag type, a stripe type, an arbitrary arrangement pattern, such as a strip|belt type, can be employ|adopted.

In addition, the arrangement area (arrangement range) or arrangement amount (coating amount) of the adhesive is not particularly limited as long as the effects of the present invention are not impaired, and any arrangement area or arrangement amount in consideration of desired flexibility, liquid permeability, etc. can be hired In addition, the above-mentioned adhesive agent may be arrange|positioned on the non-skin-facing surface of the recessed groove part in a 1st nonwoven fabric layer, and may be arrange|positioned on the skin-facing 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, for example, a compression means such as embossing with heating or non-heating, a heat sealing means such as ultrasonic welding, etc. Any bonding means of can be used. For example, when the first nonwoven fabric layer and the second nonwoven fabric layer are joined by a pressing means or a heat sealing means, the joint portion (fusion portion) is unlikely to be affected by decomposition by excreta such as urine, so that excretion such as urine It is possible to maintain a good bonding state of the bonding portion even when wet by , and it is difficult to cause distortion or the like in the absorbent article. As a result, such an absorbent article can maintain good wearing comfort even when wet.

[middle sheet]

In the panty liner 1 according to the present embodiment, the intermediate sheet 5 comprises a top sheet 4 and a back sheet 5 in the thickness direction T of the panty liner 1, as shown in Figs. 6) It is disposed so as to be located between the two and functions to impart various characteristics such as cushioning properties, strength, and absorption performance to the panty liner 1 .

In the present embodiment, the intermediate sheet 5 extends between _{the first outer peripheral edge portions E 1} positioned at each of both ends in the longitudinal direction L of the panty liner 1 in plan view, _{It extends between the second outer peripheral edge portions E 2} positioned at each of both ends in the width direction W of the panty liner 1 and has a vertically elongated outer shape identical to the outer shape of the panty liner 1 . has a

Moreover, in the absorbent article of this invention, the thing of an arbitrary planar view shape and size can be employ|adopted for the intermediate|middle sheet|seat not being limited to the thing of such a shape. Accordingly, for the intermediate sheet, for example, the intermediate sheet having absorbent performance may be disposed only in an area corresponding to the excretion opening corresponding area of the absorbent article.

Further, in the present embodiment, the intermediate sheet 5 includes the non-skin-facing surface of the topsheet 4 (more specifically, the non-skin-facing surface of the second nonwoven fabric layer 3) and a hot-melt adhesive (illustrated). not), but 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 thermal fusion. For example, when the top sheet and the intermediate sheet are joined by heat sealing, the bonding portion (fusion portion) is unlikely to be affected by decomposition by excretion such as urine, and thus distortion or the like is less likely to occur in the absorbent article. As a result, such an absorbent article can maintain a good wearing comfort even when wet.

The sheet-like member constituting the intermediate sheet is not particularly limited, and any sheet-like member may be employed depending on desired properties (eg, cushioning properties, strength, water absorption, etc.). Examples of the sheet-like member that can be used as the intermediate sheet include a hydrophobic nonwoven fabric, an absorbent sheet, and the like. When the intermediate sheet is made of a hydrophobic nonwoven fabric, even if the absorbent article (specifically, the top sheet or absorbent sheet of the absorbent article) absorbs liquid excretion such as urine and becomes wet, the absorbent article is less likely to be twisted and has a good fit is easier to maintain. On the other hand, if the intermediate sheet is made of an absorbent sheet, the liquid excrement that has passed through the top sheet without being completely absorbed by the top sheet can be absorbed and retained by the intermediate sheet, so that such excrement from the absorbent article is prevented. It is possible to suppress re-wetting by the liquid and the like, and as a result, it is possible to more reliably provide the wearer with a good fit of the absorbent article.

Further, the intermediate sheet may be constituted by a sheet-like member having a single-layer structure or a multi-layer structure using only one of the hydrophobic nonwoven fabric and the absorbent sheet, or may be constituted by a sheet-like member having a laminated structure using the hydrophobic nonwoven fabric and the absorbent sheet in combination. good. By appropriately adjusting the number of layers of the sheet-like member constituting the intermediate sheet, the wet strength, cushioning properties, absorbency, and the like of the absorbent article can be easily adjusted.

The hydrophobic nonwoven fabric usable as the intermediate sheet is not particularly limited as long as it has hydrophobicity, and any nonwoven fabric such as an air-through nonwoven fabric or an air-laid nonwoven fabric can be used. The fibers constituting such a hydrophobic nonwoven fabric are not particularly limited as long as they have hydrophobicity, and include, for example, polyolefin-based fibers such as PE and PP; polyester fibers such as PET; Hydrophobic thermoplastic resin fibers, such as various composite fibers, such as a core sheath type|mold composite fiber, can be used, and also it may contain the heat-fusible fiber. When the hydrophobic nonwoven fabric contains heat-sealable fibers, the rigidity of the intermediate sheet increases due to fusion of the heat-sealable fibers in the hydrophobic nonwoven fabric (that is, the intermediate sheet becomes difficult to twist), so It is easy to maintain good cushioning property, a feel, etc., and it becomes easy to ensure a favorable wearing comfort 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 excrement, and any absorbent material known in the art can be used. Examples of such an absorbent body include a material in which an absorbent core made of an absorbent material is covered with a core wrap sheet such as a tissue having hydrophilicity. Examples of the absorbent material constituting the absorbent core include hydrophilic fibers and superabsorbent polymers, and more specifically, cellulose fibers such as pulverized pulp and cotton; Regenerated cellulose fibers, such as rayon and fibril rayon; Semisynthetic cellulose fibers such as acetate and triacetate; granular materials made of superabsorbent polymers such as sodium acrylate copolymer; And what combined these 2 or more types arbitrarily, etc. are mentioned.

In addition, the basis weight of the intermediate sheet is not particularly limited, and any basis weight in consideration of desired strength, flexibility, cushioning properties, and the like may be employed. As such a basis weight, for example, the basis weight in the range of 20 g/m<2> - 200 g/m<2> is mentioned, Preferably it exists in the range of 30 g/m<2> - 100 g/m<2>. In the case where the intermediate sheet is formed of a sheet-like member having a multilayer structure, the total basis weight of the basis weights of each layer may be within the above-mentioned range.

In addition, the thickness of the intermediate sheet is not particularly limited, and, for example, a thickness within the range of 0.01 mm to 8.0 mm can be adopted, but from the viewpoint of strength and flexibility, it is preferably within the range of 0.05 mm to 5.0 mm, further Preferably it is in the range of 0.1 mm - 3.0 mm. Moreover, when the intermediate sheet is made of the above-mentioned hydrophobic laminated nonwoven fabric, the total thickness of the thicknesses of the respective layers constituting the hydrophobic laminated nonwoven fabric should just be within the above-mentioned range.

In addition, in the absorbent article of the present invention, since the intermediate sheet is not an essential component, when liquid absorption, liquid retention, strength, etc. as an absorbent article are secured by the top sheet, the absorbent article is designed in consideration of flexibility, etc. It can be set as the structure which abbreviate|omitted the intermediate sheet|seat.

[Backsheet]

In the panty liner 1 according to the present embodiment, the back sheet 6 is disposed at a position on the non-skin-facing side Db of the panty liner 1 as shown in Figs. 1 and 3, and is breathable. It is constituted by a liquid-impermeable sheet which functions to prevent penetration of excrement such as urine discharged from the wearer while providing the excreta so that the excretion does not leak through the wearer's clothing.

In the present embodiment, the back sheet 6 extends between _{the first outer peripheral edge portions E 1} positioned at each of both ends in the longitudinal direction L of the panty liner 1 in plan view, _{It extends between the second outer peripheral edge portions E 2} positioned at each of both ends in the width direction W of the panty liner 1 and has a vertically elongated outer shape identical to the outer shape of the panty liner 1 . has a In addition, the back sheet (liquid-impermeable sheet) in the absorbent article of the present invention is not limited to such a shape, and an arbitrary planar view shape and size can be employed.

In addition, in this 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), but the present invention is not limited to such a bonding form, The back sheet may be bonded to the intermediate sheet (or the top sheet when the absorbent article is not provided with the intermediate sheet) by any bonding means such as thermal fusion. For example, when the backsheet is joined to the intermediate sheet or topsheet by thermal fusion, the bonding portion (fusion portion) is less susceptible to decomposition by excretion such as urine, so that the absorbent article is less prone to distortion or the like. lose As a result, such an absorbent article can maintain a good wearing comfort even when wet.

The liquid-impermeable sheet used as the back sheet is not particularly limited as long as it has a predetermined liquid impermeability, and for example, a hydrophobic nonwoven fabric, a resin film such as polyethylene or polypropylene having air permeability, and a nonwoven fabric bonded to the resin film. Any liquid-impermeable sheet, such as a laminated body and laminated nonwoven fabric, such as SMS, can be used. Among these, it is preferable to use a hydrophobic nonwoven fabric from points, such as liquid impermeability, flexibility, air permeability, and strength at the time of wet (hardness to twist). Here, the degree of hydrophobicity of the hydrophobic nonwoven fabric is sufficient as long as it is hydrophobic enough not to absorb the dripped water when water is dripped onto the surface of the hydrophobic nonwoven fabric. In the present invention, when water is added dropwise to the surface of the hydrophobic nonwoven fabric, it is more preferable that the dropped water is hydrophobic (so-called water repellency) to the extent that water splashes on the surface of the hydrophobic nonwoven fabric to form water droplets.

The type of hydrophobic nonwoven fabric that can be used as the backsheet (liquid impermeable sheet) is not particularly limited, and any nonwoven fabric such as spunbond nonwoven fabric, pointbond nonwoven fabric, meltblown nonwoven fabric, and SMS nonwoven fabric can be used. Among these nonwoven fabrics, it is preferable to use a nonwoven fabric comprising 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 breathability and liquid impermeability and has adequate flexibility, when the nonwoven fabric including the ultrafine fiber layer is used as a back sheet, the wearability of the absorbent article 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.

In addition, SMS nonwoven fabric is a laminated nonwoven fabric consisting of a three-layer structure of spunbond/meltblown/spunbond, and has both air permeability and constant strength (difficulty to twist) (particularly, Because it is a nonwoven fabric capable of more effectively suppressing the permeation of excrement such as urine by the ultrafine fiber layer (melt-blown layer), when used as a back sheet, excellent air permeability and twisting difficulty (especially twisting difficulty when wet) are ensured. While doing so, it is possible to more effectively suppress leakage of excrement such as urine.

The constituent fibers of the hydrophobic nonwoven fabric that can be used as the back sheet are not particularly limited as long as they have hydrophobicity, and include, for example, polyolefin-based fibers such as PE and PP; polyester fibers such as PET; Hydrophobic thermoplastic resin fibers, such as various composite fibers, such as a core sheath type|mold composite fiber, can be used.

In addition, the basis weight of the back sheet is not particularly limited, and any basis weight in consideration of flexibility, air permeability, liquid impermeability, strength, and the like may be employed. Examples of such a basis weight include a basis weight within the range of 8 g/m 2 to 60 g/m 2 , and preferably within the range of 15 g/m 2 to 50 g/m 2 .

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

[First embossing part]

As shown in Figs. 1 to 3, the panty liner 1 according to the present embodiment has the outer peripheral edge (that is, the panty liner 1) at a position away from the outer peripheral edge portion of the panty liner 1 inward in the planar view. a first outer edge portion (E ₁₎ being disposed along a second outer edge portion (E ₂₎₎ which is located at both ends of and the width direction (W) in addition, the surface sheet length located on both ends of the direction (L) ( 4) (liquid-permeable sheet), the intermediate sheet 5 and the back sheet 6 (liquid-impermeable sheet) are integrated in the thickness direction T of the panty liner 1, a plurality of dot-shaped first M and a round-sealed portion _(S R) consisting of a boss portion (8). Round-sealed portion _(S R), as shown in Figs. 1 and 2, the first embossed part 8 of the plurality of dot-like are arranged side by side so as to draw a predetermined shape. The plurality of dot-shaped first embossed portions 8 are a top sheet 4 (liquid-permeable sheet), an intermediate sheet 5 and a back sheet 6 (liquid-impermeable), which are constituent members of the panty liner 1 . The laminated body formed by overlapping and bonding sheets) in this order is formed using heating or non-heating embossing means (eg, a pair of pressure rolls, etc.) It is formed by squeezing both surfaces of the skin non-facing surface to face each other in the thickness direction (T). Accordingly, the first embossed portion 8 has a relatively higher density than the other portions, thereby making it relatively hard. However, the panty liner 1 according to the present embodiment, the above-described first embossing unit 8, a round consisting of sealed portion (R _S) is away from the side of the plane direction inward from the outer peripheral edge of the pantiliner 1 Since the first embossed portion 8, which is hard in hardness, is difficult to contact with the skin surface such as the wearer's thigh or groin, it is difficult to give the wearer a sense of foreign body caused by the first embossed portion 8. has been

Further, in the panty liner 1 according to this embodiment, as shown in round-sealed portion (R _S) consisting of the above-described first embossing unit 8, Figs. 1 and 2, in a plan view, briefs It is arrange|positioned along the whole area of the outer peripheral edge part of the liner 1 . Such disposition of the round seal portion along the entire outer peripheral edge portion of the absorbent article is not an essential constitutive requirement for the absorbent article of the present invention, and if the round seal portion is arranged at least partially along the outer peripheral edge portion of the absorbent article, However, from the viewpoints of shape retention of the absorbent article and prevention of leakage of excrement, it is preferable that the round seal portion be continuously or intermittently disposed along the entire area of the outer periphery of the absorbent article as in the above-described embodiment.

In this embodiment, a round-sealed portion (R _S) is, arranged side by side, the first embossed part 8 of the form a plurality of dots so as to draw a predetermined shape composed of the above-described first embossed portion 8 However, in the present invention, the arrangement form of the first embossed portion forming the round seal portion is not particularly limited as long as it is disposed at a position away from the outer peripheral edge portion of the absorbent article inward in the planar direction, and the first embossed portion is not particularly limited. , a straight line, a curved line, a broken line, and a zigzag type.

Further, in the present embodiment, the individual first embossed portions 8 forming the round seal portion have a substantially circular planar view shape, but in the present invention, the planar view shape of these individual first embossed portions is It is not particularly limited, and any shape such as an oval, a triangle, a quadrangle, a star, a straight line, a broken line, and a geometric figure can be adopted other than the circle as in the above-described embodiment.

The size of the individual first embossed portions forming the round seal portion is not particularly limited as long as the effects of the present invention are not impaired, and any size in consideration of the shape-retaining properties of the absorbent article, the leakage prevention properties of excrements, flexibility, and the like. can be employed

[Second embossing part]

As shown in Figs. 1 to 3, the panty liner 1 according to the present embodiment has a first sheet extending in a direction parallel to the _{first direction D 1 among the outer peripheral edges of the panty liner 1 .} a first outer edge portion (E ₁₎ and the round-sealed portion (R _S) (more specifically, between the, as a position away toward the inward of the plane direction from the first outer edge portion (E ₁₎ of the panty liner 1, and the round-seal portion (R _S) arranged at a position) toward the outside in the plane direction are also described above from the first embossing unit (8) than the plurality of dot-like having a plan view area of the second embossing unit (9 ) is provided. This second embossed portion 9 is also similar to the above-described first embossed portion 8, the top sheet 4 (liquid permeable sheet), the intermediate sheet 5 and the back sheet 6 ( The liquid-impermeable sheet) is pressed in the thickness direction T of the panty liner 1, and these sheets are integrated in the thickness direction T.

The panty liner 1 according to the present embodiment includes a first outer peripheral edge portion E _{1 extending in a direction parallel to the first direction D 1} among the outer peripheral edge portions of the panty liner 1 ; since the position between the above-described round-sealed portion (R _S), it comprises a second embossing unit (9), the second M by a boss portion (9), near the outer edge of the panty liner (1) ( That is, the end 24 of the first nonwoven fabric layer 2 in the vicinity of the first outer peripheral edge portion E ₁ ) is rolled up and protrudes toward the skin-facing surface side Da, or protrudes outward in the planar direction. It can be suppressed, and it becomes difficult to produce the foreign body feeling and appearance defect by such protrusion of the edge part 24.

The second embossed portion 9, since it has a smaller plan view area than the first embossed portion (8) of the round-sealed portion (R _S), for example, the second embossing portion 9. The wearer Even when it touches the skin surface such as the thigh or groin of The excellent wearing feeling exhibited by the sheet) can be maintained favorably.

As described above, in the panty liner 1 according to the present embodiment, the first outer peripheral edge portion E ₁ protrudes outward in the longitudinal direction L (the second direction D ₂ ) in plan view. It has an external shape curved as much as possible, and the above-mentioned some dot-shaped 2nd embossing part 9 is arrange|positioned so that it may follow the curved external shape of the _{said 1st outer peripheral edge part E 1 .} When 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 in this way, the end portion of the first nonwoven fabric layer is easily formed as a free end in the outer shape (that is, the first outer periphery). Even for an absorbent article having an outer shape in which the edge portion is curved to protrude outward in the second direction in plan view), the end of the above-described first nonwoven fabric layer is rolled up and protrudes toward the skin-facing surface side, or in the planar direction It can suppress more reliably that it protrudes outward.

Further, in the present embodiment, the second embossed portion 9 is, as shown in Figs. 1 and 2 , in the longitudinal direction L (second direction D ₂ ) of the outer peripheral edge portions of the panty liner 1 . ) a second outer edge portion (E ₂₎ extending in a direction parallel to and is not disposed between the round-sealed portion _(S R). Although the arrangement form of such a second embossed portion is not an essential constitutive requirement in the absorbent article of the present invention, the second embossed portion is disposed between the second outer peripheral edge portion and the round seal portion of the absorbent article as in the above-described embodiment. It is preferable not to. 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 portion of the above-described first nonwoven fabric layer does not easily protrude, the embossed portion Since there is no hard hard part and it becomes more difficult to give a feeling of a foreign body to a wearer, the outstanding fit of an absorbent article can be maintained more reliably.

Further, in the present invention, the position of the second embossed portion is not particularly limited as long as it is a position between the first outer peripheral edge portion of the absorbent article and the round seal portion, and the second embossed portion is, as in the above-described embodiment, It may be arranged at a position away from the first outer peripheral edge of the absorbent article in a planar direction inward and further away from the round seal portion in a planar outward direction, and in plan view, at least the first outer peripheral edge of the absorbent article. and may be disposed at a position overlapping with

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 this invention, the 2nd embossing part 9 is arrange|positioned at the position which overlaps with _{the 1st outer peripheral edge part E 1 at least in planar view.} When the second embossed portion is disposed at such a position (that is, in a plan view, at least a position overlapping with the first outer peripheral edge portion), the second embossed portion causes the second embossed portion near the outer peripheral edge portion of the absorbent article. Since the portion serving as the free end of the first nonwoven fabric layer can be reduced, it is possible to more reliably suppress that the end portion of the first nonwoven fabric layer is rolled up and protrudes toward the skin-facing surface side or protrudes outward in the planar direction. Thereby, in the absorbent article provided with such a structure, it becomes more difficult to produce the feeling of foreign material by the protrusion of the edge part mentioned above, and an appearance defect.

In addition, in this invention, the arrangement|positioning form of a 2nd embossing part is not restrict|limited in particular unless the effect of this invention is impaired, The 2nd embossing part is a several dot like embodiment shown in FIG.1 and FIG.2. The second embossed portion of the mold may be arranged side by side so as to draw the same predetermined shape as the first embossed portion forming the round seal portion, or may be arranged in an arbitrary shape such as a straight line, a curved line, a broken line, and a zigzag shape. good.

Further, in the present invention, the planar shape of each second embossed portion is not particularly limited, and in addition to the circular shape as in the embodiment shown in Figs. 1 and 2, oval, triangular, square, star, straight, broken line, Any shape, such as a geometric figure, can be employ|adopted.

The size of each second embossed portion is not particularly limited as long as it has a smaller planar view area than each of the first embossed portions forming the round seal portion, and the shape retaining properties of the absorbent article, excreta leakage prevention properties, and flexibility are not particularly limited. Any size in consideration of the above can be employed. Since the respective second embossed portions have a smaller planar view area than the respective first embossed portions forming the round seal portion, even if the second embossed portion touches the skin surface of the wearer's thigh or groin, for example, The hardness is hardly perceived by the wearer (that is, it is difficult to give a foreign feeling to the wearer), and the excellent wearing comfort exhibited by the topsheet (liquid-permeable sheet) having the above-described specific uneven structure can be maintained satisfactorily.

Hereinafter, another embodiment of the present invention in which the direction in which the protrusions and concave grooves of the topsheet (liquid permeable sheet) extend from the respective embodiments described above is different will be described with reference to the drawings. In addition, since structures other than a structure different from each embodiment mentioned above are basically the same as that of embodiment mentioned above, description is abbreviate|omitted.

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 top sheet is the skin in the thickness direction T of the panty liner 10, as shown in FIG. _{The ridges 21 protruding toward the opposite surface side and continuously extending in the first direction D 1} corresponding to the longitudinal direction L of the panty liner 10, and the skin non-facing in the thickness direction T The concave groove portions 22 dented toward the surface and _{continuously extending in the first direction D 1} are alternated _{along the second direction D 2} corresponding to the width direction W of the panty liner 10 . It has a concave-convex structure 20 arranged as Also in this panty liner 10, the first nonwoven fabric layer 2 is in the second direction D ₂ in the extended state (that is, the direction corresponding to the width direction W of the panty liner 10). The length of the second nonwoven layer 3 is made of a nonwoven fabric longer than the length in _{the second direction (D 2 ).}

Further, as shown in Fig. 6, the panty liner 10 is also a plurality of panty liner 10 arranged so as to follow the outer peripheral edge portion at a position away from the outer peripheral edge portion of the panty liner 10 inward in the planar view. extending in a direction parallel to the first embossing unit 8, a round-sealed portion consisting of (R _S) and the first direction of the outer peripheral edge portion of the panty liner (10) (D ₁₎ of the dot-like (i.e. , located in each of both end portions in the width direction (W) of the pantiliner (10) between and extending substantially in longitudinal direction (L)), the first outer edge portion (E ₁₎ and the round-sealed portion (R _S) and a second embossed portion 9 which is disposed and has a smaller planar area than the first embossed portion 8 .

Accordingly, in this panty liner 10 as well, by the second embossed portion 9 described above, in the vicinity of the outer periphery of the panty liner 10 (that is, in the vicinity of the first outer periphery E ₁ ). 1 It is possible to suppress the end 24 of the nonwoven fabric layer 2 from being rolled up and protruding toward the skin-facing surface side Da or protruding outward in the planar direction. It becomes difficult for a defect to occur.

In addition, the present invention can be applied to various absorbent articles, such as sanitary napkins and (trans)incontinence pads, in addition to the panty liners of each embodiment described above. In addition, the absorbent article of this invention is not restrict|limited to embodiment mentioned above, A combination, a change, etc. are suitably possible within the range which does not deviate from the objective and meaning of this invention. In addition, in this specification, ordinal numbers such as "first" and "second" are for distinguishing the items to which the ordinal numbers are attached, and do not mean the order, priority, importance, etc. of each item.

1: Panty liner (an example of an absorbent article)
2: first non-woven fabric layer
20: uneven structure
21: convex grandfather
22: concave groove
23: hollow
3: second nonwoven layer
4: Top sheet (an example of a liquid-permeable sheet)
5: middle sheet
6: Back sheet (an example of liquid-impermeable sheet)
7: junction
8: first embossing part
9: 2nd embossing part
10: panty liner (an example of an absorbent article)
11: release sheet
12: adhesive part

Claims (8)

A first non-woven fabric layer forming a skin-facing surface, and a liquid-permeable sheet in which a second non-woven fabric layer adjacent to the non-skin-facing surface of the first non-woven fabric layer is joined at a joint portion, is located on the non-skin-facing side of the liquid-permeable sheet An absorbent article comprising a liquid-impermeable sheet comprising:
The first nonwoven fabric layer includes a protrusive ridge that protrudes toward the skin-facing surface side in the thickness direction of the absorbent article and extends continuously in the first direction, and is recessed toward the non-skin-facing surface side in the thickness direction. Also, the concave groove portions continuously extending in the first direction have a concave-convex structure alternately arranged along a second direction orthogonal to the first direction, and some or all of the concave groove portions are the above-mentioned concave groove portions in the joint portion. It is bonded to the second non-woven fabric layer,
In addition, the first nonwoven layer has a length in the second direction in an extended state is longer than a length in the second direction of the second nonwoven fabric layer, and consists of a nonwoven fabric capable of forming the ridges,
wherein the absorbent article is disposed so as to partially or entirely follow the outer peripheral edge at a position away from the outer peripheral edge of the absorbent article inward, and a first first for integrating the liquid-permeable sheet and the liquid-impermeable sheet in the thickness direction. A round seal part consisting of an embossing part, and
a second embossed portion disposed between the first outer peripheral edge portion extending in a direction parallel to the first direction among the outer peripheral edge portions and the round seal portion and having a smaller planar area than the first embossed portion An absorbent article provided. The absorbent article according to claim 1, wherein the ridges have a hollow internal structure. The second embossed portion is not provided according to claim 1 or 2, wherein the second embossed portion is not disposed between a second outer peripheral edge portion extending in a direction parallel to the second direction among the outer peripheral edge portions and the round seal portion. absorbent article. The absorbent article according to claim 1 or 2, wherein the absorbent article has a vertically elongated 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 adhesive agent according to claim 1 or 2, wherein the first nonwoven fabric layer and the second nonwoven fabric layer are joined through an adhesive at the joint portion, while the adhesive is not present between the outer peripheral edge portion and the round seal portion. An absorbent article having a non-adhesive free area. The absorbent article according to claim 1 or 2, wherein the first nonwoven layer has a thickness greater than that of the second nonwoven layer. The absorbent article according to claim 1 or 2, wherein the second embossed portion is disposed at a position overlapping with at least the first outer peripheral edge portion in a plan view. The method according to claim 1 or 2, wherein the first outer peripheral portion has an outer shape curved so as to protrude outward in the second direction in a plan view, and the second embossed portion includes the first outer peripheral edge The absorbent article is arranged so as to conform to the outer shape of the portion.

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