CN109789046B - absorbent articles - Google Patents

Abstract

The invention provides an absorptive article which is not easy to generate foreign body feeling, has poor appearance and excellent wearing feeling. The absorbent article of the present invention includes a liquid-permeable sheet in which a 1 st nonwoven fabric layer (2) and a 2 nd nonwoven fabric layer (3) are joined together at a joint (7), wherein the 1 st nonwoven fabric layer (2) has a specific uneven structure (20) formed by alternately arranging raised strips (21) and recessed grooves (22) that extend continuously in a predetermined 1 st direction along a 2 nd direction orthogonal to the 1 st direction, and the absorbent article includes: a circular arc seal portion formed of a 1 st embossed portion (8), the 1 st embossed portion (8) being disposed at a position inwardly spaced from an outer peripheral edge portion of the absorbent article; and a 2 nd embossed portion (9) which is arranged between a 1 st outer peripheral edge portion extending in a direction parallel to the 1 st direction and the arc seal portion, and which has a smaller plan view area than a plan view area of the 1 st embossed portion (8).

Description

absorbent articles

technical field

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

Background technique

For absorbent articles such as panty liners, light incontinence pads, and sanitary napkins, the ability to rapidly absorb liquid excretion such as urine and menstrual blood without leaking to the outside has been sought. In addition to the ability of the product, it also seeks to have excellent skin feel, fit to the wearer's body, and excellent wearing feeling.

For example, Patent Document 1 discloses an absorbent article which is formed by overlapping a plurality of sheets, and has left and right side edge portions, front and rear edge portions extending in the longitudinal direction so as to be longitudinally elongated, wherein: The plurality of crimping portions of the first group are provided on the inner sides of the both side edge portions within a range of a predetermined length that traverses the transverse center line that divides the absorbent article into two in the longitudinal direction and extends in the longitudinal direction, The plurality of crimping parts of the first group are arranged in a row with a predetermined interval apart from the shape of the edge parts on both sides; A non-crimping area extending in the arrangement direction of the plurality of crimping parts. As in the absorbent article disclosed in Patent Document 1, if a plurality of crimping portions such as an arc seal portion are provided on the inner side of the outer peripheral edge portion of the absorbent article, the relatively hard crimping portions are not easily connected to the wearer. There is an advantage that the wearer is not easily given a foreign body sensation due to the crimped portion, etc.

prior art literature

Patent Literature

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

SUMMARY OF THE INVENTION

Invention to solve problem

On the other hand, in order to improve the softness and the touch feeling of the absorbent article and obtain a more excellent wearing feeling, a technique of using a first nonwoven fabric and a second nonwoven fabric as the surface sheet of the absorbent article has been studied. A specific liquid-permeable sheet formed of cloth, wherein the above-mentioned first nonwoven fabric has a concavo-convex structure formed by alternately arranging ridge portions and groove portions along a second direction orthogonal to a predetermined first direction, and forms an absorption The skin-opposing surface of the absorbent article, the ridge portion protrudes toward the skin-opposing surface side in the thickness direction of the absorbent article and extends continuously along the first direction, and the groove portion faces the non-skin in the thickness direction The opposite surface side is concave and extends continuously along the first direction, the second non-woven fabric is adjacent to the non-skin facing surface of the first non-woven fabric, and at least a part of the first non-woven fabric is The said groove part is joined to the said 2nd nonwoven fabric.

However, when such a technique is applied to the absorbent article disclosed in the above-mentioned Patent Document 1, since a plurality of crimping portions such as the arc seal portion is provided inside the outer peripheral edge portion of the absorbent article, the absorbent article Among the outer peripheral edge portions of the surface sheet, the outer peripheral edge portion of the end portion located in the second direction orthogonal to the first direction in which the ridge portion of the surface sheet extends (especially the outer periphery of the end portion located in the second direction) When the edge portion is formed in a curved shape), at least a part of the end portion of the first nonwoven fabric is formed as a free end (ie, an unfixed end portion), and if the end portion faces the skin-opposite side of the absorbent article Or, if the outer side in the plane direction protrudes (see FIG. 4 ), there is a possibility that the wearer may be given a foreign body feeling, the wearing feeling may be reduced, and the appearance as an absorbent article may be deteriorated.

Then, the objective of this invention is to provide the absorbent article which is hard to generate|occur|produce the foreign body feeling as mentioned above, has a poor appearance, and is excellent in wearing feeling.

solution to the problem

One aspect (aspect 1) of the present invention is an absorbent article comprising: a liquid-permeable sheet, a first non-woven fabric layer forming a skin-facing surface, and a non-skin-facing non-skin-facing surface of the first non-woven fabric layer. The second non-woven fabric layers adjacent to the surface are joined together at the joint to form the liquid-permeable sheet; and the liquid-impermeable sheet is located on the non-skin-opposite side of the liquid-permeable sheet, wherein ,

The said 1st nonwoven fabric layer has the uneven|corrugated structure in which the convex part and the groove part are alternately arrange|positioned along the 2nd direction orthogonal to the predetermined 1st direction, and this convex part is formed in the said absorbent article. The groove portion protrudes toward the skin-opposing surface side in the thickness direction and extends continuously along the first direction, and the groove portion is recessed toward the non-skin-opposing surface side in the thickness direction and extends continuously along the first direction , and at least a part of the groove portion is joined with the second non-woven fabric layer at the joint portion,

In addition, the ridges can be formed by the length in the second direction of the first nonwoven fabric layer being longer than the length in the second direction of the second nonwoven fabric layer in a stretched state. The non-woven fabric of the part is formed,

The absorbent article includes:

an arc seal portion formed of a first embossed portion arranged at least partially along the outer peripheral edge portion at a position spaced inward from the outer peripheral edge portion of the absorbent article, and integrating the liquid-permeable sheet and the liquid-impermeable sheet in the thickness direction; and

A second embossed portion is disposed between a first outer peripheral edge portion of the outer peripheral edge portion extending in a direction parallel to the first direction and the arc seal portion, and has a larger diameter than the The plan view area of the first embossed portion is small in plan view area.

Since the absorbent article of this claim 1 includes a first outer peripheral edge portion that is disposed in the outer peripheral edge portion and extends in a direction parallel to the first direction and the arc seal portion, and has a ratio of The first embossed portion of the arc seal portion is a second embossed portion having a small plan area in plan view, so that the second embossed portion can be used to suppress the absorbent article of the first nonwoven fabric layer. When the edge near the outer peripheral edge portion is rolled up and protrudes toward the skin-opposing surface side, or protrudes outward in the plane direction, foreign body sensation and poor appearance are less likely to occur due to the protrusion of the edge portion.

Moreover, in the absorbent article of this claim 1, since the above-mentioned second embossed portion has a plan view area smaller than that of the first embossed portion of the arc seal portion, even if the second embossed portion has a plan view area smaller than that of the first embossed portion of the arc seal portion It is not easy for the wearer to feel the hardness (that is, it is not easy to give the wearer a foreign body feeling) when it comes into contact with the skin surface of the wearer's thighs, etc., and the liquid permeability having the above-mentioned specific uneven structure can be maintained satisfactorily. The excellent wearing feeling achieved by the sexual sheet.

Moreover, according to the absorbent article of the said Claim 1, in another Claim (claim 2) of this invention, the said rib part has a hollow internal structure.

In the absorbent article of the second aspect of the invention, since the ridge portion of the first nonwoven fabric layer has a hollow internal structure, good cushioning properties and softer skin feel can be obtained, and as an absorbent article, more Excellent wearing feel.

According to the absorbent article according to claim 1 or claim 2, in yet another claim (claim 3) of the present invention, in the outer peripheral edge portion, a portion extending in a direction parallel to the second direction The second embossing portion is not arranged between the second outer peripheral edge portion and the arc seal portion.

In the absorbent article according to claim 3, there is no gap between the second outer peripheral edge portion extending in the direction parallel to the second direction and the arc seal portion among the outer peripheral edge portions. Since the second embossed portion is arranged, there is no portion having a high hardness due to the embossed portion in the second outer peripheral edge portion where the protrusion of the end portion of the first nonwoven fabric layer is less likely to occur. It is more difficult to bring foreign body sensation to the wearer. Thereby, the absorbent article of this Claim 3 can maintain the outstanding wearing feeling more reliably.

According to any one of the absorbent articles of the above-mentioned claims 1 to 3, in yet another aspect (claim 4) of the present invention, the absorbent article has a vertically elongated outer shape, and the outer shapes are orthogonal to each other The length direction and the width direction of the first direction are parallel to the width direction.

In the absorbent article of claim 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 vertically long external shape, and the above-mentioned first occurrence is likely to occur. The protruding first outer peripheral edge portion of the end portion of the nonwoven fabric layer serves as the outer peripheral edge portion of the end portion in the longitudinal direction of the absorbent article, so that it is easy to be in contact with the wearer's thigh and groin portion. The protrusion of the edge of the first nonwoven fabric layer described above is less likely to occur at the outer peripheral edge of the edge in the width direction of the article, and a foreign body sensation due to the protrusion of the edge is less likely to occur. Thereby, the absorbent article of this Claim 4 can maintain the said outstanding wearing feeling more reliably.

In addition, when the absorbent article of claim 4 further includes the structure of claim 3 described above, the difference between the second outer peripheral edge portion of the end portion in the width direction of the absorbent article and the arc seal portion Since the above-mentioned second embossing portion is not arranged between, the absorbent article does not exist in the second outer peripheral edge portion of the end portion in the width direction of the absorbent article that is likely to be in contact with the wearer's thigh and groin portion. The hard part due to the embossed part is more reliably less likely to give a foreign body feeling to the wearer.

According to the absorbent article of any one of the above-mentioned claims 1 to 4, in yet another aspect (claim 5) of the present invention, the first nonwoven fabric layer and the second nonwoven fabric layer are in the same The joining portion is joined by an adhesive, and on the other hand, there is an adhesive non-existing region in which the adhesive does not exist between the outer peripheral edge portion and the arc seal portion.

In the absorbent article of this claim 5, since there is no space between the outer peripheral edge portion and the arc seal portion for connecting the first nonwoven fabric layer and the second nonwoven fabric Since the adhesive agent-free region of the adhesive layer is bonded together, it is difficult for the wearer to feel the hardness of the bonding portion formed by the adhesive in the vicinity of the outer peripheral edge portion, which is likely to be in contact with the wearer's skin surface. , it is more difficult to bring foreign body sensation to the wearer.

According to any one of the absorbent articles of the above-mentioned claims 1 to 5, in still another aspect (claim 6) of the present invention, the first nonwoven fabric layer has a larger thickness than the second nonwoven fabric layer. Thick thickness.

In the absorbent article of claim 6, since the first nonwoven fabric layer has a thickness greater than that of the second nonwoven fabric layer, convexity can be secured in the first nonwoven fabric layer. The restoring force of the bar portion with respect to the compression in the thickness direction can exhibit higher cushioning performance. In addition, when a nonwoven fabric having a large restoring force such as the protruding line portion is used for the first nonwoven fabric layer, the end portion of the first nonwoven fabric layer is usually easily rolled up and protrudes toward the skin-opposing surface side. , or protrude outward in the plane direction, since the absorbent article of claim 6 includes the second embossed portion described above, such protruding of the edge of the first nonwoven fabric layer can be suppressed.

Therefore, the absorbent article of this Claim 6 can exhibit higher cushioning performance, and it is hard to generate|occur|produce the foreign body feeling and external appearance defect by the protrusion of the said edge part.

According to any one of the absorbent articles of the above-mentioned claims 1 to 6, in yet another aspect (claim 7) of the present invention, the second embossed portion is disposed at least at the same distance from the first outer periphery in a plan view. The position where the edges overlap.

In the absorbent article of this claim 7, since the second embossed portion is disposed at a position overlapping at least the first outer peripheral edge portion, the first embossed portion can be reduced in size by the second embossed portion. The portion of the non-woven fabric layer that becomes the free end in the vicinity of the outer peripheral edge of the absorbent article can more reliably prevent the end portion of the first non-woven fabric layer from being rolled up and protruding toward the skin-opposing surface side or in the plane direction. On the outside protruding condition. Thereby, the absorbent article of this Claim 7 can make it more difficult to generate|occur|produce the foreign body feeling and external appearance defect by the protrusion of the said edge part.

According to any one of the absorbent articles of the above-mentioned claims 1 to 7, in yet another aspect (claim 8) of the present invention, the first outer peripheral edge portion has a direction in the second direction in a plan view. The outer shape is curved so as to protrude outside, and the second embossed portion is arranged along the outer shape of the first outer peripheral edge portion.

In the absorbent article of this claim 8, since the above-mentioned second embossed portion is arranged along the curved outer shape of the first outer peripheral edge portion of the absorbent article, even if it has the above-mentioned first nonwoven fabric layer The absorbent article in which the end portion is easily formed into the outer shape of the free end (that is, the outer shape in which the first outer peripheral edge portion is curved so as to protrude outward in the second direction in plan view) can more reliably suppress the above-mentioned The state in which the edge part of a 1st nonwoven fabric layer is rolled up and protrudes to the skin-opposing surface side, or to the outer side in the plane direction. Thereby, the absorbent article of this Claim 8 can make it difficult to generate|occur|produce the foreign body feeling and external appearance defect by the protrusion of the said edge part more reliably.

effect of invention

According to the present invention, it is possible to provide an absorbent article which is less likely to produce the above-mentioned foreign body sensation, has poor appearance, and is excellent in wearing feeling.

Description of drawings

FIG. 1 is a partially cutaway perspective view of a panty linen 1 according to an embodiment of the present invention.

FIG. 2 is a plan view of the panty line 1 according to the embodiment of the present invention.

Fig. 3 is a partial cross-sectional view taken along line III-III in Fig. 2 of the panty linen 1 according to the embodiment of the present invention.

Fig. 4 is a partial cross-sectional view corresponding to Fig. 3 of the pantiliner 1' without the second embossed portion.

Fig. 5 is an enlarged plan view of a main part of a sanitary pad according to another embodiment of the present invention.

FIG. 6 is a plan view of the panty line 10 according to still another embodiment of the present invention.

Detailed ways

Hereinafter, preferred embodiments of the absorbent article of the present invention will be described in detail with reference to the accompanying drawings. In addition, in this specification, unless otherwise specified, "from the upper side in the vertical direction along the thickness direction of the object to the object placed on the horizontal surface in a spread state (such as an absorbent article, a surface sheet) (liquid-permeable sheet) etc.) to observe" is abbreviated as "plan view".

Unless otherwise specified, various directions and the like used in this specification are as follows.

In this specification, the "longitudinal direction" refers to "the direction in which the length of a vertically long object (for example, an absorbent article, a topsheet (liquid-permeable sheet), etc.) is long in plan view", and the "width direction" refers to "The direction in which the length of the vertically long object is short (short-side direction) in plan view", and the "thickness direction" refers to "the direction perpendicular to the object placed on the horizontal plane in the unfolded state". The above-mentioned longitudinal direction, width direction, and thickness direction are all in a relationship orthogonal to each other. In addition, in this specification, the "planar direction" refers to "the direction in which the plane of a substantially sheet-like object (for example, an absorbent article, a surface sheet (liquid-permeable sheet), etc.) extends in a plan view (ie, a horizontal plane direction) ”, the plane direction and the thickness direction are in an orthogonal relationship to each other.

Also, in this specification, "the near side of the longitudinal center axis _CW extending in the width direction, which is relatively close to the longitudinal center of the longitudinally elongated object in the longitudinal direction" is referred to as The "inner side in the longitudinal direction" is referred to as "the outer side in the width direction" as "the distal side relatively farther from the longitudinal center axis _CW in the longitudinal direction of the vertically long object". Similarly, "relatively close to the widthwise center axis _CL of the vertically long object in the widthwise direction of the object and extending in the widthwise direction" is referred to as "the widthwise direction". The inner side of the longitudinally long object is referred to as the "outer side in the width direction", which is relatively far from the widthwise central axis _CL in the width direction of the vertically long object. In addition, in this specification, "the near side of the intersection of the longitudinal center axis _CW and the width direction center axis _CL of the substantially sheet-shaped object is relatively close in the plane direction of the object" is referred to as "" The inner side in the plane direction", and "the distal side of a substantially sheet-shaped object that is relatively far from the intersection of the longitudinal center axis _CW and the width direction center axis _CL of the object in the plane direction" is referred to as " Outer side in plane direction".

In addition, in this specification, unless otherwise specified, in the thickness direction of the absorbent article, "the proximal side of the absorbent article that is relatively close to the wearer's skin surface when worn" is referred to as the "skin surface side" ”, and the “distal side of the absorbent article which is relatively far from the skin surface of the wearer when worn” is referred to as the “non-skin surface side”. Here, "wearing" means a period (wearing period) during which the state is maintained from the time when the wearer puts on the absorbent article (ie, the time when the absorbent article is in a usable state).

In addition, in this specification, the "surface on the side opposite to the skin" of various members (for example, a surface sheet (liquid-permeable sheet), a back sheet (liquid-impermeable sheet), etc.) constituting the absorbent article is simply referred to as "" "Skin-opposite surface", and "the surface on the side of the non-skin-opposite surface" is simply referred to as "non-skin-opposite surface".

FIG. 1 is a partial cross-sectional perspective view of the pantiliner 1 according to an embodiment of the present invention, FIG. 2 is a plan view of the pantiliner 1, and FIG. 3 is a partial cross-sectional view of the pantiliner 1 taken along line III-III in FIG. 2 . .

As shown in FIGS. 1 and 2 , a sanitary pad 1 according to an embodiment of the present invention has a vertically elongated outer shape in plan view, and the outer shape has a longitudinal direction L and a width direction W. More specifically, a sanitary pad 1 has a longitudinally elongated outer shape such that outer peripheral edge portions (first outer peripheral edge portions E ₁ in FIG. 1 and FIG. 2 ) located at both ends in the longitudinal direction L are directed outward in the longitudinal direction L, respectively. The protruding manner is curved, and the substantially central portion in the longitudinal direction L is slightly narrowed toward the inner side in the width direction W. As shown in FIG.

Moreover, in this invention, the external shape of an absorbent article is not limited to such a form, Arbitrary external shape (for example, a rectangle, an ellipse, an hourglass, etc.) can be employ|adopted according to various uses etc.. FIG.

As shown in FIGS. 1 to 3 , as a basic structure, the sanitary pad 1 of the present embodiment includes, in the thickness direction T, a surface sheet 4 formed of a liquid-permeable sheet located on the sanitary pad 1 . The skin-opposing surface side Da is formed by a first non-woven fabric layer 2 having a specific concave-convex structure 20 described later and a second non-woven fabric layer 3 laminated on the first non-woven fabric layer 2; the back sheet 6, It is formed by a liquid-impermeable sheet located on the non-skin-opposite side Db of the sanitary pad 1; and an intermediate sheet 5, which is located between the above-mentioned topsheet 4 and the above-mentioned backsheet 6, and the skin-opposite side Da of the topsheet 4 is formed. The surface of the back sheet 6 (ie, the skin-opposing surface) forms the skin-opposing surface of the sanitary pad 1 , and the non-skin-opposing surface (ie, the non-skin-opposing surface) of the back sheet 6 forms the non-skin-opposing surface of the sanitary pad 1 .

In addition, in this embodiment, the surface sheet 4 and the intermediate sheet 5 and the intermediate sheet 5 and the back sheet 6 are each joined via the adhesive layer (not shown) which consists of a hot melt adhesive agent.

Moreover, as shown in FIG. 3, the non-skin facing surface of the back sheet 6 has an adhesive portion 12 for fixing to clothing, and the adhesives continuously extending in the width direction W are arranged in a plurality of lines along the longitudinal direction L The adhesive portion 12 for fixing to clothing is formed by being arranged in a manner (so-called stripe), and the adhesive portion 12 has a release sheet 11 on the surface of the non-skin-opposite side, and the release sheet 11 is arranged such that Substantially the entire surface of the non-skin facing surface of the back sheet 6 is covered to protect the adhesive portion 12 before use. The sanitary pad 1 configured as described above is worn as follows: when wearing, the above-mentioned release sheet 11 is peeled off, and the sanitary pad is attached by the adhesive portion 12 for fixing to clothing disposed on the non-skin facing surface of the back sheet 6 . 1 is fixed to the inner surface of the wearer's clothing (eg, underwear, etc.) so that the surface sheet 4 faces the wearer's skin surface.

In addition, the adhesive for forming the above-mentioned adhesive portion is not particularly limited as long as it can fix the absorbent article to the clothing of the wearer, and for example, any adhesive containing a styrene-based polymer or the like can be used. . In addition, the arrangement pattern of the adhesive is not particularly limited, either, and the adhesive may extend intermittently in the width direction W, or may extend continuously or intermittently in the longitudinal direction L.

Furthermore, in the pantiliner 1 of the present embodiment, as shown in FIG. 3 , the top sheet 4 is formed of a liquid-permeable sheet that is a first nonwoven that will form the skin-facing surface of the pantiliner 1 The fabric layer 2 and the second non-woven fabric layer 3 adjacent to the non-skin facing surface of the first non-woven fabric layer 2 are formed by joining together at the joint portion 7, and the first non-woven fabric layer 2. It has a concave-convex structure 20 in which convex strips 21 and concave grooves 22 are alternately arranged along a second direction D ₂ corresponding to the longitudinal direction L of the pantiliner 1. The convex strips 21 are in the sanitary pad 1 In the thickness direction T, the groove portion 22 protrudes toward the skin-opposing surface side and extends continuously along the _first direction D1 corresponding to the width direction W of the sanitary pad 1, and the groove portion 22 faces the non-skin in the thickness direction T. The opposite surface side is recessed and extends continuously along the first direction D ₁ , and at least a part of the groove portion 22 is joined to the second nonwoven fabric layer 3 at the joining portion 7 . In addition, the above-mentioned first nonwoven fabric layer 2 can be formed such that the length in the _first direction D1 in the stretched state is longer than the length in the _first direction D1 of the second nonwoven fabric layer 3. The nonwoven fabric of the ridge portion 21 is formed.

Furthermore, as shown in FIGS. 1 to 3 , the pantiliner 1 includes a circular arc seal portion R _S formed by a first embossed portion 8 that is positioned between the pantiliner 1 in a plan view. The outer peripheral edge portion of the sheet is arranged along the outer peripheral edge portion at a position separated from the inner side in the plane direction, and the top sheet 4 (liquid-permeable sheet), the intermediate sheet 5 and the back sheet 6 ( The liquid-impermeable sheet) is integrated in the thickness direction T of the sanitary pad _1; Between the first outer peripheral edge portion E ₁ extending in a parallel direction (that is, respectively located at both ends in the longitudinal direction L of the sanitary pad 1 and extending in the approximate width direction W) and the arc seal portion R _S , And it has a plan view area smaller than the plan view area of the said 1st embossed part 8. FIG.

The panty linen 1 of the present embodiment includes a second embossed portion 9 that is arranged in the outer peripheral edge portion of the pantiliner ₁ and extends in a direction parallel to the first direction D1 Between the first outer peripheral edge portion E1 _of the arc seal portion R S and the arc seal portion R _S , since there is a plan area smaller than the plan view area of the first embossed portion 8 of the arc seal portion R _S , it is possible to use this The second embossed portion 9 prevents the end portion 24 of the first nonwoven fabric layer 2 from being rolled up in the vicinity of the outer peripheral edge portion of the pantiliner ₁ (that is, in the vicinity of the first outer peripheral edge portion E1 ) and facing the skin. When the side Da protrudes or protrudes outward in the plane direction, foreign body sensation and poor appearance due to the protrusion of the end portion 24 are less likely to occur.

In addition, since the above-mentioned second embossed portion 9 has a plan view area smaller than the plan view area of the first embossed portion 8 of the arc seal portion R _S in the panty sheet 1, even if the second embossed portion is assumed to be The part 9 is in contact with the skin surface of the wearer's thigh, groin, etc., and it is not easy for the wearer to feel its hardness (that is, it is not easy to give the wearer a foreign body feeling), and it can be well maintained by having the above-mentioned specific characteristics. The liquid-permeable sheet of the concavo-convex structure 20 realizes an excellent wearing feeling.

Here, FIG. 4 is a partial cross-sectional view corresponding to FIG. 3 of the panty line 1 ′ not provided with the second embossed portion as described above, and in this FIG. 4 , components other than the second embossed portion, That is, the first nonwoven fabric layer 2', the second nonwoven fabric layer 3', the intermediate sheet 5', the back sheet 6', the joint portion 7', the first embossed portion 8', the release sheet 11', and the adhesive portion 12' are respectively the same as in the above-mentioned embodiment.

As shown in FIG. 4 , in the panty linen 1' that does not include the second embossed portion as described above, in the outer peripheral edge portion of the panty linen 1', it is located on the side of the first nonwoven fabric layer 2'. The outer peripheral edge portion E' ₁ (especially in the outer peripheral edge portion E' of the end portion in the second direction (that is, the longitudinal direction L of the pantiliner 1') perpendicular to the first direction in which the protruding strip portion 21' extends. ₁ , when it is formed into a curved shape in a plan view), at least a part of the end portion 24' of the first non-woven fabric layer 2' is formed as a free end, and the end portion 24' faces the skin of the sanitary pad 1'. (In addition, the form shown in FIG. 4 is a form in which the end portion 24' protrudes to the outside in the planar direction of the pantiliner 1'.) may cause the wearer to protrude outward in the opposite surface side or in the planar direction. There are problems such as a foreign body feeling, a decrease in the wearing feeling, or deterioration of the appearance as an absorbent article.

In addition, in the present invention, the outer peripheral edge portion of the absorbent article refers to the outer edge of the external shape of the absorbent article in plan view. For example, in the sanitary pad 1 of the above-described embodiment, the outer peripheral edge portion of the absorbent article includes The first outer peripheral edge portions E ₁ located at both ends in the longitudinal direction L of the pantiliner 1 and the second outer peripheral edge portions E ₂ located at both ends in the width direction W are respectively. Here, the first outer peripheral edge portion E ₁ is one of the outer peripheral edge portions of the pantiliner 1 that extends in a direction substantially parallel to the first direction D ₁ in which the ridge portions 21 of the first nonwoven fabric layer 2 extend. The outer peripheral edge portion, the second outer peripheral edge portion E ₂ is the second outer peripheral edge portion of the pantiliner 1 , which is perpendicular to the first direction D ₁ extending from the ridge portion 21 of the first nonwoven fabric layer 2 . The outer peripheral edge portion extending in _two substantially parallel directions in the direction D2.

Furthermore, in the present invention, the ridges and grooves of the first nonwoven fabric layer are located at the highest points including the ridges in the thickness direction of the first nonwoven layer (that is, in the thickness direction). The first imaginary horizontal plane including the point closest to the skin-opposite side) and the lowest point of the groove portion (that is, the point located closest to the non-skin-opposite side in the thickness direction) The third imaginary horizontal plane in the middle of the second imaginary horizontal plane (that is, the position at the same distance from the first imaginary horizontal plane and the second imaginary horizontal plane) is used as a reference, and the part protruding toward the skin-opposing surface side is called As a convex part, the part recessed toward the non-skin opposing surface is called a groove part.

In addition, in this specification, "planar area" means the area of the external shape (namely, planar shape) of the object seen from a plan view. Therefore, when the top view shape of the 1st crimped part or the 2nd crimped part is a circle, the area of this circle becomes the planar view area of the 1st crimped part or the 2nd crimped part. In addition, when the top view shape of the 1st crimping part or the 2nd crimping part is a shape in which a plurality of geometric figures and the like are combined (that is, a shape in which each geometric figure and the like are continuously connected) , the overall area of the combined shape becomes the top view area, and the top view shape is a shape in which a plurality of geometric figures etc. are not combined but are assembled (that is, although the geometric figures and the like are not connected, they are formed by gathering shape), the area of each geometric figure or other shape is the plan view area.

Hereinafter, various members etc. which comprise the absorbent article of this invention are demonstrated in detail using the panty sheet 1 of the above-mentioned embodiment.

[surface sheet]

In the panty pad 1 of the present embodiment, as shown in FIGS. 1 and 3 , the top sheet 4 is disposed at a position on the skin-opposite surface side Da of the panty pad 1 that is in direct contact with the wearer's skin surface. The first non-woven fabric layer 2 having the above-mentioned specific uneven structure 20 and the non-skin-facing surface of the first non-woven fabric layer 2 are formed from a liquid-permeable sheet, which will form the skin-facing surface of the sanitary pad 1 . The adjacent second nonwoven fabric layers 3 are joined together at the joining portion 7 to form the above-mentioned liquid-permeable sheet.

In the present embodiment, as shown in FIGS. 1 and 2 , in a plan view, the surface sheet 4 is located in the range between the first outer peripheral edge portions E ₁ of both ends in the longitudinal direction L of the panty pad 1 , respectively. It extends inward and extends in the range between the second outer peripheral edge portions E ₂ of both ends in the width direction W of the sanitary pad 1. The surface sheet 4 has the same external shape as the sanitary pad 1. Longitudinal shape. Moreover, in the absorbent article of this invention, the surface sheet (liquid-permeable sheet) is not limited to such a shape, Arbitrary planar shape and size can be employ|adopted.

In addition, in the present embodiment, the liquid-permeable sheet used as the top sheet 4 is formed of a liquid-permeable sheet that forms the skin-facing surface of the pantiliner 1 and has the above-mentioned specific uneven structure 20. The woven fabric layer 2 and the second non-woven fabric layer 3 adjacent to the non-skin opposing surface of the first non-woven fabric layer 2 are joined together at the joining portion 7 to form the above-mentioned liquid-permeable sheet.

As described above, the first nonwoven fabric layer 2 constituting the liquid-permeable sheet has the ridges 21 and the grooves 22 which are alternately arranged along the _second direction D2 corresponding to the longitudinal direction L of the pantiliner 1 The specific concave-convex structure 20 is formed in which the protruding strips 21 protrude toward the skin-opposing surface side Da in the thickness direction T of the pantiliner 1 and along the first direction D corresponding to the width direction W of the pantiliner 1 ₁ extends continuously, the groove portion 22 is recessed toward the non-skin-opposing surface side Db in the thickness direction T, and extends continuously along the first direction D ₁ , and at least a part of the groove portion 22 is in the The joint portion 7 is joined to the second nonwoven fabric layer 3 .

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

Moreover, in this embodiment, as shown in FIG. 3, the said ridge part 21 has the hollow part 23 which the non-skin opposing surface of the 1st nonwoven fabric layer 2 faces. The absorbent article of the present invention is not an essential structural condition when the ridges of the first nonwoven fabric layer have such a hollow internal structure, but if the ridges of the first nonwoven layer have such a hollow internal structure With a hollow inner structure, good cushioning properties and softer skin feel can be obtained, and a more excellent wearing feeling can be obtained as an absorbent article. On the other hand, if the ridge portion of the first non-woven fabric layer has a solid internal structure, it is difficult to form a void between the first non-woven fabric layer and the second non-woven fabric layer, and the liquid is released from the liquid-permeable sheet. The transferability of the skin-opposite side to the non-skin-opposite side was good.

In the present invention, as long as the effect of the present invention is not impaired, the height of the protruding portion of the first nonwoven fabric layer is not particularly limited, and for example, it is in the range of 0.01 mm to 6.0 mm. Considering the aspect, it is preferably within the range of 0.1 mm to 4.0 mm, and more preferably within the range of 0.1 mm to 3.0 mm. Similarly, as long as the effect of the present invention is not impaired, the depth of the groove portion of the first non-woven fabric layer is not particularly limited. It is considered that it is preferably within the range of 0.1 mm to 4.0 mm, and more preferably within the range of 0.1 mm to 3.0 mm. In addition, in this specification, the "height of the ridge portion" refers to the height from the second imaginary horizontal plane as a reference plane to the highest point of the ridge portion (that is, between the first imaginary horizontal plane and the second imaginary horizontal plane). The “depth of the groove portion” refers to the depth from the first imaginary horizontal plane as the reference plane to the lowest point of the groove portion (that is, the distance between the above-mentioned first imaginary horizontal plane and the above-mentioned second imaginary horizontal plane) .

In the present invention, as long as the effects of the present invention are not impaired, the widths of the ridges and grooves (that is, the maximum lengths of the ridges and grooves in the second direction) of the first nonwoven fabric layer are not particularly limited. The limit is, for example, in the range of 0.1 mm to 15.0 mm, but from the viewpoint of cushioning properties and skin feel, it is preferably in the range of 0.5 mm to 10.0 mm, and more preferably in the range of 1.0 mm to 5.0 mm.

Further, in the present invention, the direction in which the ridges and grooves of the first nonwoven fabric layer extend, that is, the first direction is not particularly limited, but it is preferable to have a vertical direction like in the above-mentioned embodiment. The width direction of the long-shaped absorbent article is parallel. When the first direction in which the ridges and grooves of the first nonwoven fabric layer extend is parallel to the width direction of the absorbent article having a vertically long outer shape, the above-mentioned edge of the first nonwoven fabric layer tends to occur. The protruding first outer peripheral edge portion of the absorbent article becomes the outer peripheral edge portion of the end portion in the longitudinal direction of the absorbent article, and therefore, in the width direction of the absorbent article that is likely to come into contact with the wearer's thigh and groin portion In the outer peripheral edge part of an edge part, the protrusion of the edge part of the said 1st nonwoven fabric layer is hard to generate|occur|produce, and the foreign body feeling by the protrusion of this edge part is less likely to generate|occur|produce. Thereby, with respect to the absorbent article which has this structure, the said outstanding wearing feeling can be maintained more reliably.

In addition, in the above-mentioned embodiment, the length of the first nonwoven fabric layer 2 in the _first direction D1 in the stretched state (that is, the flat state before forming the uneven structure) is longer than the length of the second nonwoven fabric layer 3 A nonwoven fabric having a length in the _first direction D1 is formed, and the above-mentioned specific uneven structure 20 is given to the nonwoven fabric by any processing method (for example, shaping processing under heating conditions or non-heating conditions, etc.) The first nonwoven fabric layer 2 is formed. The provision of the specific uneven structure 20 may be performed before joining with the second nonwoven fabric layer 3 , or may be performed substantially simultaneously with the joining of the second 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, a spunlace nonwoven fabric, an air-through nonwoven fabric, and a spunbond nonwoven fabric can be used. , point-bonded non-woven fabrics, melt-blown non-woven fabrics, and combinations of the above-mentioned non-woven fabrics (for example, SMS non-woven fabrics, etc.) and other arbitrary non-woven fabrics. Among them, a spunlace nonwoven fabric can be preferably used from the viewpoint of being excellent in flexibility and the like.

Further, as long as the first nonwoven fabric layer has a predetermined liquid permeability, the fibers constituting the first nonwoven fabric layer are not particularly limited, and any fibers can be used, but from the viewpoints of liquid absorption, liquid retention, and the like, Hydrophilic fibers are preferably used. 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; Hydrophilized thermoplastic resin fibers, composite fibers, etc. Among them, cellulose fibers such as cellulose fibers, regenerated cellulose fibers, and semi-synthetic cellulose fibers are preferably used, and cotton, Rayon or a blend of cotton and rayon.

In addition, when the absorbent article further includes an intermediate sheet or an absorber capable of absorbing and retaining excretion such as urine, or when the amount of excrement to be targeted is assumed to be small, etc., in addition to the above-mentioned hydrophilic fibers The first non-woven fabric layer may also contain polyolefin fibers such as polyethylene (PE) and polypropylene (PP); polyester fibers such as polyethylene terephthalate (PET); hydrophobic fibers such as heat-fusible fibers flexible thermoplastic resin fibers. When the first nonwoven fabric layer contains such thermoplastic resin fibers, the content thereof is not particularly limited, but it is preferable to contain thermoplastic resin fibers in a mass ratio of less than 50% by mass from the viewpoint of securing a certain level of absorption performance or more. resin fiber.

In addition, 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 unit determined in consideration of liquid absorption, liquid retention, cushioning properties, flexibility, and the like can be adopted. area weight. Such a basis weight can be, for example, a basis weight within a range of 5 g/m ² to 60 g/m ² , and preferably within a range of 10 g/m ² to 50 g/m ² . In addition, the basis weight can be measured in accordance with 5.2 of JIS L 1906.

The thickness of the first nonwoven fabric layer is not particularly limited as long as the effect of the present invention is not impaired. It is preferable to exist in the range of 0.01 mm - 3.0 mm, and it is more preferable to exist in the range of 0.05 mm - 2.0 mm from the viewpoints of properties, skin feel, and the like.

In this invention, it is preferable that a 1st nonwoven fabric layer has a thickness larger than the thickness of a 2nd nonwoven fabric layer. If the first non-woven fabric layer has a thickness larger than that of the second non-woven fabric layer, the restoring force of the ridge portion with respect to the compression in the thickness direction can be ensured in the first non-woven fabric layer, Therefore, higher buffer performance can be exerted. In addition, when a nonwoven fabric having a large restoring force of such a ridge portion is used for the first nonwoven fabric layer, the end portion of the first nonwoven fabric layer is usually easily rolled up and protrudes toward the skin-opposing surface side. Or it protrudes to the outer side in a planar direction, but since the absorbent article of this invention is provided with the said 2nd embossing part, it can suppress the protrusion of the edge part of such a 1st nonwoven fabric layer. Therefore, by using such a nonwoven fabric for the first nonwoven fabric layer, the absorbent article of the present invention can exhibit higher cushioning performance, and the foreign body sensation and appearance due to the protrusion of the above-mentioned end portions are less likely to occur. bad.

Here, the thicknesses of the nonwoven fabrics used in the first nonwoven fabric layer and the second nonwoven fabric layer, and various sheets such as the intermediate sheet and the back sheet to be described later can be obtained as follows: A sample piece of a predetermined size (for example, 30 mm×30 mm, etc.) is cut out of the sheet, and the cut sample piece is placed in an automatic compression tester (model: KES FB-3A) manufactured by Kato Technology Co., Ltd. The thickness (mm) when the pressure applied to the sample piece by the measuring terminal is 49Pa is measured.

In the above-described embodiment, the second non-woven fabric layer 3 constituting the liquid-permeable sheet is adjacent to the non-skin facing surface of the first non-woven fabric layer 2 and is connected to the first non-woven fabric layer 2 at the joint portion 7 At least a part of the groove portion 22 of the non-skin-opposite surface is engaged. In the present embodiment, the second nonwoven fabric layer 3 is formed of a nonwoven fabric having a substantially flat structure and predetermined liquid permeability. The absorbent article of the present invention is not an essential structural condition for the second nonwoven fabric layer to have such a substantially flat structure, but when the second nonwoven fabric layer has such a substantially flat structure, it is easy to A hollow portion having a predetermined volume or more is formed inside the protruding portion of the first nonwoven fabric layer, and the liquid-permeable sheet can be provided with more excellent cushioning properties, softness, etc., and can obtain a more excellent wearing feeling as an absorbent article. On the other hand, if the second nonwoven fabric layer has such a structure that it enters into the hollow portion of the ridge portion of the first nonwoven fabric layer or that the hollow portion is filled up, it is not easy to connect the first nonwoven fabric layer and the hollow portion. A void is formed between the second nonwoven fabric layers, and the transferability of the liquid from the skin-opposing surface side of the liquid-permeable sheet to the non-skin-opposing surface side is favorable.

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 hydrophobic nonwoven fabric, a water repellent nonwoven fabric, a nonwoven fabric made of a hydrophilic A tissue paper formed of fibers, a spunlace nonwoven fabric, an air-through nonwoven fabric, a spunbond nonwoven fabric, a point-bonded nonwoven fabric, a meltblown nonwoven fabric, and the above-mentioned nonwoven fabrics similar to the first nonwoven fabric layer described above. Arbitrary non-woven fabrics such as combinations of woven fabrics (for example, SMS non-woven fabrics, etc.). Among them, from the viewpoint of being excellent in liquid absorption, liquid retention, flexibility, and the like, tissue paper made of hydrophilic fibers can be preferably used.

In addition, as long as the second nonwoven fabric layer has a predetermined liquid permeability, the fibers constituting the second nonwoven fabric layer are not particularly limited, and any fibers can be used, but from the viewpoints of liquid absorption, liquid retention, and the like, It is preferable to use the same hydrophilic fibers as the above-mentioned first nonwoven fabric layer. In addition, the second nonwoven fabric layer may contain thermoplastic resin fibers in addition to the hydrophilic fibers, similarly to the above-described first nonwoven fabric layer.

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 determined in consideration of liquid absorption, liquid retention, cushioning, flexibility, and the like can be adopted . Such a basis weight can be, for example, a basis weight within a range of 1 g/m ² to 50 g/m ² , and preferably within a range of 3 g/m ² to 40 g/m ² .

The thickness of the second nonwoven fabric layer is not particularly limited as long as the effect of the present invention is not impaired. From the viewpoint of properties and the like, it is preferably within a range of 0.01 mm to 2.0 mm, and more preferably within a range of 0.05 mm to 1.0 mm.

[joint part]

In the above-described embodiment, as shown in FIGS. 1 and 3 , in the sanitary pad 1, the first nonwoven fabric layer 2 (more specifically, the groove portion 22 of the first nonwoven fabric layer 2) and The second nonwoven fabric layers 3 are joined to each other at the joining portion 7 by an arbitrary adhesive (not shown) such as a hot-melt adhesive. When the first nonwoven fabric layer 2 and the second nonwoven fabric layer 3 are joined together at the joining portion 7 in this way, displacement and deformation between the above-mentioned layers are less likely to occur, so that the absorbency can be exhibited more stably The absorption performance and wearing feeling of the article.

Furthermore, in the panty linen 1 of the present embodiment, the first nonwoven fabric layer 2 and the second nonwoven fabric layer 3 are joined together by an adhesive at the above-mentioned joining portion 7, but in the sanitary pad Between the outer peripheral edge portion of the pad 1 and the arc seal portion Rs, there is an adhesive non-existing region where no adhesive is present. If the absorbent article has an adhesive at such a position, that is, between the outer peripheral edge portion of the absorbent article and the arc seal portion, the adhesive that does not exist for the adhesive that joins the first nonwoven fabric layer and the second nonwoven fabric layer The non-existing region makes it difficult for the wearer to feel the hardness of the joint portion due to the adhesive in the vicinity of the outer peripheral edge portion that is likely to be in contact with the wearer's skin surface, so that it is less likely to give the wearer a foreign body feeling. Wait.

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. Arbitrary arrangement patterns such as multi-channel spiral shape, Ω shape, wavy line shape, zigzag shape, stripe shape, strip shape, etc. extending in the direction.

Furthermore, the arrangement area (arrangement range) and arrangement amount (coating amount) of the adhesive are not particularly limited as long as the effects of the present invention are not impaired, and can be determined in consideration of desired flexibility, liquid permeability, and the like Arbitrary configuration area and configuration quantity. Moreover, the above-mentioned adhesive agent may be arrange|positioned on the non-skin opposing surface of the groove part of a 1st nonwoven fabric layer, and may be arrange|positioned on the skin opposing surface of a 2nd nonwoven fabric layer.

In addition, 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 agent, for example, compression means such as heating or non-heating embossing can be used, Any joining means such as thermal welding means such as ultrasonic welding. For example, when the first nonwoven fabric layer and the second nonwoven fabric layer are joined together by compression means or thermal welding means, the joined portion (welded portion) is less susceptible to the influence of decomposition or the like due to excrement such as urine. Therefore, even when wetted by excrement such as urine, the joined state of the joined portion can be maintained well, and the absorbent article is less likely to be twisted or the like. As a result, the absorbent article can maintain a good wearing feeling even when wet.

[intermediate film]

In the sanitary pad 1 of the present embodiment, as shown in FIGS. 1 and 3 , the intermediate sheet 5 is arranged so as to be located between the top sheet 4 and the back sheet 6 in the thickness direction T of the sanitary pad 1 , so as to improve hygiene The pad 1 functions by imparting various properties such as cushioning, strength, and absorption performance.

In the present embodiment, the intermediate sheet 5 extends in a range between the _first outer peripheral edge portions E1 at both ends in the longitudinal direction L of the pantiliner 1 in a plan view, and also extends between the first outer peripheral edge portions E1 located at the both ends of the pantiliner 1 in the longitudinal direction L, respectively. It extends in the range between the _2nd outer peripheral edge part E2 of both ends in the width direction W of 1, and has the same longitudinally long outer shape as the outer shape of the pantiliner 1.

In addition, in the absorbent article of the present invention, the intermediate sheet is not limited to such a shape, and an arbitrary plan shape and size can be employed. Therefore, as for the intermediate sheet, for example, the intermediate sheet having absorption performance may be arranged only in the region corresponding to the region corresponding to the excretion opening of the absorbent article.

In addition, in this embodiment, the intermediate sheet 5 is bonded to the non-skin opposing surface (more specifically, the non-skin facing surface of the second nonwoven fabric layer 3) of the top sheet 4 with a hot-melt adhesive (not shown). Opposing surface), but the present invention is not limited to such a joining method, and the intermediate sheet and the surface sheet may be joined by any joining means such as thermal fusion. For example, when the top sheet and the intermediate sheet are joined together by heat welding, the joined portion (welded portion) is not easily affected by decomposition due to excretion such as urine, so that the absorbent article is less likely to be twisted or the like. As a result, the 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 adopted according to desired properties (eg, cushioning properties, strength, absorbency, and the like). As a sheet-like member which can be used as an intermediate sheet, a hydrophobic nonwoven fabric, an absorptive sheet, etc. are mentioned, for example. When the intermediate sheet is formed of a hydrophobic nonwoven fabric, even if the absorbent article (specifically, the surface sheet of the absorbent article, the absorbent sheet, etc.) absorbs liquid excretion such as urine and becomes wet, the absorbent article is not easily warped. Twist, easy to maintain a good wearing feeling. On the other hand, when the intermediate sheet is formed of an absorbent sheet, the intermediate sheet can absorb and retain liquid excrement that has not been completely absorbed by the top sheet but has permeated through the top sheet, so that self-absorption of the excrement can be suppressed. Leakage, backflow, etc. of the absorbent article can be prevented, and as a result, the wearer can be more reliably provided with a good wearing feeling of the absorbent article.

In addition, the intermediate sheet may be formed of a sheet-like member having a single-layer structure or a multi-layer structure formed by using only one of the hydrophobic nonwoven fabric and the absorbent sheet, or may be formed of a sheet-like member having a hydrophobic nonwoven fabric using both A sheet-like member of a laminated structure formed with an absorbent sheet is formed. By appropriately adjusting the number of layers of the sheet-like member constituting the intermediate sheet, the wet strength, cushioning properties, absorbency, etc. of the absorbent article can be easily adjusted.

The hydrophobic nonwoven fabric that can be used as the intermediate sheet is not particularly limited as long as it has hydrophobicity, and for example, any nonwoven fabric such as an air-laid nonwoven fabric and an air-laid nonwoven fabric can be used. The fibers constituting the hydrophobic nonwoven fabric are not particularly limited as long as they have hydrophobicity. For example, the following hydrophobic thermoplastic resin fibers can be used: polyolefin fibers such as PE and PP; polyester fibers such as PET; sheath-core fibers Various conjugate fibers such as conjugate fibers, and the fibers may also contain heat-fusible fibers. When the hydrophobic nonwoven fabric contains heat-fusible fibers, the rigidity of the intermediate sheet is high (that is, the intermediate sheet is not easily twisted) due to the fusion between the heat-fusible fibers in the hydrophobic nonwoven fabric. It is easy to maintain the favorable cushioning property of the above-mentioned surface sheet, a skin feel, etc., and it becomes easy to ensure favorable wearing feeling as an absorbent article.

Moreover, as an absorptive sheet|seat which can be used as an intermediate sheet, if it can absorb and hold|maintain liquid excretion, it will not specifically limit, An arbitrary absorber well-known in this field may be used. As such an absorber, the absorber which covered the absorption core which consists of an absorptive material with a core wrap sheet, such as a tissue paper which has a hydrophilic property, is mentioned, for example. Examples of the absorbent material constituting the absorbent core include hydrophilic fibers, superabsorbent polymers, and the like, and more specifically, cellulose fibers such as pulverized pulp and cotton; and regenerated fibers such as rayon and fibril rayon. cellulose fibers; semi-synthetic cellulose fibers such as acetate and triacetate; particulate matter formed from superabsorbent polymers such as sodium acrylate polymers; and materials formed by any combination of two or more of the above-mentioned materials.

In addition, the basis weight of the intermediate sheet is not particularly limited, and an arbitrary basis weight determined in consideration of desired strength, flexibility, cushioning properties, and the like can be employed. Such a basis weight can be, for example, a basis weight within a range of 20 g/m ² to 200 g/m ² , and preferably within a range of 30 g/m ² to 100 g/m ² . In addition, when the intermediate sheet is formed of a sheet-like member having a multilayer structure, the total basis weight of the basis weight of each layer may be within the above-mentioned range.

In addition, the thickness of the intermediate sheet is not particularly limited, for example, a thickness in the range of 0.01 mm to 8.0 mm can be used, but from the viewpoint of strength, flexibility, etc., it is preferably in the range of 0.05 mm to 5.0 mm, and more preferably Within the range of 0.1mm to 3.0mm. In addition, when the intermediate sheet is formed of the above-described hydrophobic laminated nonwoven fabric, the total thickness of the thicknesses of the layers constituting the hydrophobic laminated nonwoven fabric may be within the above-described range.

In addition, in the absorbent article of the present invention, the intermediate sheet is not an essential component, so when the surface sheet is used to ensure the liquid absorbency, liquid retention, strength, etc. as the absorbent article, the absorbency In terms of articles, the intermediate sheet can be omitted in consideration of flexibility and the like.

[back sheet]

In the pantiliner 1 of the present embodiment, as shown in FIGS. 1 and 3 , the back sheet 6 is disposed at the position of the non-skin-opposing surface side Db of the pantiliner 1, and is formed of a liquid-impermeable sheet, which is impermeable to the skin. The liquid-permeable sheet has air permeability and functions to prevent permeation of excrement such as urine discharged by the wearer and prevent the excrement from leaking to the wearer's clothing or the like.

In the present embodiment, the back sheet 6 extends in a range between the _first outer peripheral edge portions E1 located at both ends in the longitudinal direction L of the pantiliner 1 in a plan view, and is located in the pantiliner It extends in the range between the _2nd outer peripheral edge part E2 of both ends in the width direction W of 1, and has the same longitudinally long outer shape as the outer shape of the pantiliner 1. Moreover, in the absorbent article of this invention, the back sheet (liquid-impermeable sheet) is not limited to such a shape, Arbitrary planar shape and size can be employ|adopted.

In addition, in the present embodiment, the back sheet 6 is joined to the non-skin-opposed surface of the intermediate sheet 5 with a hot melt adhesive (not shown), but the present invention is not limited to such a joining form, and The back sheet and the intermediate sheet (in the case where the absorbent article does not have the intermediate sheet, the surface sheet) can be joined together by any joining means such as heat fusion. For example, when the back sheet and the intermediate sheet or the top sheet are joined by heat welding, the joined portion (welded portion) is not easily affected by decomposition due to excretion such as urine, etc., so the absorbent article is not easily generated. Twisted etc. As a result, the absorbent article can maintain a good wearing feeling even when wet.

Further, 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 a breathable polyethylene and polypropylene, and a non-woven fabric can be used. Arbitrary liquid-impermeable sheets, such as a laminated body formed by bonding a woven fabric to the resin film, and a laminated non-woven fabric such as SMS. Among them, it is preferable to use a hydrophobic nonwoven fabric from the viewpoints of liquid impermeability, flexibility, air permeability, and strength (twisting difficulty) when wet. Here, the degree of hydrophobicity of the hydrophobic nonwoven fabric is sufficient as long as it is sufficiently hydrophobic to not absorb the dripped water when water is dropped on the surface of the hydrophobic nonwoven fabric, but excretion from urine or the like is sufficient. In consideration of the difficulty of leakage of the material, the strength when wet, etc., it is more preferably hydrophobic to the extent that water droplets are formed when water is dropped on the surface of the hydrophobic nonwoven fabric by being repelled by the surface of the hydrophobic nonwoven fabric ( so-called water repellency).

The type of the hydrophobic nonwoven fabric that can be used as the back sheet (liquid-impermeable sheet) is not particularly limited. For example, spunbond nonwoven fabrics, point bonded nonwoven fabrics, meltblown nonwoven fabrics, SMS Arbitrary non-woven fabrics such as woven fabrics. Among the above-mentioned nonwoven fabrics, a nonwoven fabric including an ultrafine fiber layer formed of fibers having a fineness of 1 dtex or less is preferably used, and an SMS nonwoven fabric is more preferably used.

The nonwoven fabric containing the ultrafine fiber layer is excellent in air permeability and liquid impermeability, and has moderate flexibility. Therefore, if such a nonwoven fabric containing the ultrafine fiber layer is used as a back sheet, an absorbent article can be obtained. The wearing feeling is better. In addition, 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, since the SMS non-woven fabric is a laminated non-woven fabric formed by a 3-layer structure of spunbond/meltblown/spunbond, it has both air permeability and (especially achieved by the spunbond layer) a certain strength (twisting) difficulty) and can more effectively suppress the permeation of excretions such as urine (especially by using a meltblown layer as an ultrafine fiber layer), so if it is used as a back sheet, excellent air permeability can be ensured And the difficulty of twisting (especially the difficulty of twisting when wet) and the leakage of excrement such as urine can be suppressed more effectively.

In addition, 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. For example, the following hydrophobic thermoplastic resin fibers can be used: polyolefin fibers such as PE and PP; polyolefin fibers such as PET; Ester fibers; sheath-core composite fibers and other composite fibers.

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

The thickness of the back sheet is not particularly limited. For example, a thickness in the range of 0.01 mm to 5.0 mm can be used. However, from the viewpoints of flexibility, air permeability, liquid impermeability, and strength, it is preferably 0.05 mm to 3.0 mm. within the range.

[1st Crimping Section]

As shown in FIGS. 1 to 3 , the panty linen 1 of the present embodiment includes an arc seal portion R _S formed by a plurality of dot-shaped first embossed portions 8 that are viewed in plan view At a position separated from the outer peripheral edge portion of the sanitary pad 1 to the inner side in the plane direction, along the outer peripheral edge (that is, the first outer peripheral edge portion E1 located at both ends in the longitudinal direction L and the _first outer peripheral edge portion E1 located in the width direction L). The second outer peripheral edge portions E ₂ ) of both ends in the direction W are arranged so that the top sheet 4 (liquid-permeable sheet), the intermediate sheet 5 and the back sheet 6 (liquid-impermeable sheet) are placed on the The panty liners 1 are integrated in the thickness direction T of the panty liners 1 . As shown in FIGS. 1 and 2 , in the arc seal portion _RS , a plurality of dot-shaped first embossed portions 8 are arranged in a row so as to draw a predetermined pattern. The plurality of dot-shaped first embossing portions 8 are formed by applying a heating or non-heating embossing means (for example, a pair of pressure rolls, etc.) to a laminate to be described later so that the skin-facing and back surfaces of the surface sheet 4 The two surfaces of the non-skin-opposing surface of the sheet 6 are compressed so as to face each other in the thickness direction T, and this laminate is formed by combining the surface sheet 4 (liquid-permeable sheet), The intermediate sheet 5 and the back sheet 6 (liquid-impermeable sheet) are sequentially stacked and joined together. Therefore, since the density of this 1st embossed part 8 is relatively high compared with other parts, the hardness is also relatively hard. However, in the pantiliner 1 of the present embodiment, the circle formed by the first crimped portion 8 described above is disposed at a position separated from the outer peripheral edge portion of the pantiliner 1 inward in the plane direction. Because of the arc seal portion R _S , the first embossed portion 8 having a relatively hard hardness is less likely to come into contact with the skin surface of the wearer's thighs, groin, etc., and it is difficult to cause the first embossed portion 8 to the wearer. resulting in a foreign body sensation.

In addition, in the sanitary pad 1 of the present embodiment, as shown in FIGS. 1 and 2 , the arc seal portion R _S formed by the first embossed portion 8 described above is along the outer periphery of the sanitary pad 1 in plan view. The entire area of the edge is arranged. In this way, the form of arranging the arc seal portion along the entire area of the outer peripheral portion of the absorbent article is not an essential structural condition in the absorbent article of the present invention, and the arc seal portion only needs to be along the absorbent article at least partially. It is sufficient to arrange the outer peripheral edge of the absorbent article, but from the viewpoints of shape retention of the absorbent article, prevention of leakage of excrement, etc., it is preferable that the arc seal portion is along the outer peripheral edge of the absorbent article as in the above-mentioned embodiment. The entire area of is configured continuously or intermittently.

Furthermore, in the present embodiment, in the arc seal portion _RS formed by the first embossed portion 8 described above, the plurality of dot-shaped first embossed portions 8 are arranged in a row so as to draw a predetermined pattern, but In the present invention, the arrangement form of the first embossed portion forming the arc seal portion is not particularly limited as long as it is arranged at a position separated from the outer peripheral edge portion of the absorbent article inward in the planar direction. The 1st embossed part can be arrange|positioned in arbitrary forms, such as a linear shape, a curved shape, a wavy line shape, and a zigzag shape.

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

In addition, the size of each of the first embossed portions forming the arc seal portion is not particularly limited as long as the effects of the present invention are not impaired, and the shape retention properties of the absorbent article, the leakage prevention properties of excrement, and the flexibility can be adopted. Any size determined by properties, etc.

[Second Crimping Section]

As shown in FIGS. 1 to 3 , the sanitary pad 1 of the present embodiment includes a plurality of dot-shaped second embossed portions 9 , and the plurality of second embossed portions 9 are arranged in the outer peripheral edge portion of the sanitary pad 1 . between the first outer peripheral edge portion E ₁ extending in a direction parallel to the above-mentioned first direction D ₁ and the arc seal portion R _S (more specifically, the first outer peripheral edge portion of the pantiliner 1) _The position where the edge portion E1 is separated from the inner side in the plane direction, and the position where the edge portion E1 is separated from the outer side in the plane direction from the arc seal portion R _S ), and has a higher The top view area is small. Similar to the first embossed portion 8 described above, the second embossed portion 9 also passes through the surface sheet 4 (liquid-permeable sheet), the intermediate sheet 5 and the back sheet 6 (liquid-impermeable sheet). ) is formed by compressing in the thickness direction T of the pantiliner 1, and the above-mentioned sheet is integrated in the thickness direction T.

The pantiliner 1 of the present embodiment includes a first outer peripheral edge portion E1 extending in a direction parallel to the above-described _first direction D1, which is located in the outer peripheral edge portion of the sanitary pad ₁ , and the above-described circular arc. Since the second embossed portion 9 between the seal portions _RS , the second embossed portion 9 can be used to suppress the first nonwoven fabric layer 2 in the vicinity of the outer peripheral edge portion of the panty sheet 1 (that is, the first In the case where the end 24 of the outer peripheral edge portion E1 ₎ is rolled up and protrudes to the skin-opposing surface side Da, or to the outside in the planar direction, foreign body sensation and appearance due to the protrusion of the end 24 are less likely to occur. bad.

Furthermore, since the second embossed portion 9 has a plan view area smaller than that of the first embossed portion 8 of the arc seal portion _RS , even if the second embossed portion 9 comes into contact with the wearer's thigh, The skin surface such as the groin is also not easily felt by the wearer (that is, it is not easy to give a foreign body sensation to the wearer), and the surface sheet 4 (liquid permeability) having the above-mentioned specific uneven structure 20 can be well maintained. sheet) to achieve an excellent wearing feeling.

As described above, in the sanitary pad 1 of the present embodiment, the first outer peripheral edge portion E ₁ has an outer shape curved so as to protrude outward in the longitudinal direction L (second direction D ₂ ) in plan view, The above-described plurality of dot-shaped second embossed portions 9 are arranged along the curved outer shape of the _first outer peripheral edge portion E1. If the second embossed portion is disposed along the curved outer shape of the first outer peripheral edge portion of the absorbent article in this way, even the end portion having the above-mentioned first nonwoven fabric layer can easily be formed into the outer shape of the free end ( That is, an absorbent article in which the first outer peripheral edge portion is curved so as to protrude outward in the second direction in plan view) can more reliably suppress the curling of the end portion of the first nonwoven fabric layer. A condition in which it protrudes to the side opposite to the skin, or to the outer side in the plane direction.

In addition, in this embodiment, as shown in FIGS. 1 and 2 , the second embossed portion 9 is not arranged in the outer peripheral edge portion of the panty pad 1 along the longitudinal direction L (second direction D ₂ ). Between the second outer peripheral edge portion _E2 extending in the parallel direction and the arc seal portion _RS . Although the arrangement form of such a second embossed portion is not an essential structural condition in the absorbent article of the present invention, it is preferable that the second embossed portion is not arranged in the second portion of the absorbent article like the above-mentioned embodiment. between the outer peripheral edge portion and the arc seal portion. If the second embossed portion is not arranged between the second outer peripheral edge portion of the absorbent article and the arc seal portion, the above-mentioned second outer peripheral edge where the protruding of the end portion of the first nonwoven fabric layer is unlikely to occur. Since there is no part with a high hardness due to the embossed part, it is more difficult to give a foreign body feeling to the wearer, and therefore, the excellent wearing feeling of the absorbent article can be more reliably maintained.

In addition, in the present invention, the position where the second embossed portion is arranged is not particularly limited as long as it is a position between the first outer peripheral edge portion of the absorbent article and the arc seal portion, and the second embossed portion may be as described above. It is arranged at a position separated from the first outer peripheral edge portion of the absorbent article to the inner side in the plane direction and is separated from the arc seal portion to the outer side in the plane direction as in the embodiment of the absorbent article, and may be arranged in a plan view. It is the position which overlaps with at least the said 1st outer peripheral edge part of an absorbent article.

Here, FIG. 5 is an enlarged plan view of a main part of a panty linen 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 E1 at least in planar view. When the second embossed portion is arranged at such a position (that is, a position overlapping at least the first outer peripheral edge portion in plan view), the vicinity of the outer peripheral edge portion of the absorbent article can be reduced in size by the second embossed portion. Since the part which becomes the free end of the 1st nonwoven fabric layer, the edge part of a 1st nonwoven fabric layer can be suppressed more reliably, and it can suppress that the edge part of the 1st nonwoven fabric layer rolls up and protrudes to the skin-opposing surface side, or to the outer side in the planar direction. Thereby, the absorbent article which has such a structure is less likely to generate a foreign body feeling and poor appearance due to the protrusion of the above-mentioned end portion.

In addition, in the present invention, as long as the effect of the present invention is not impaired, the arrangement form of the second embossed portion is not particularly limited, and the second embossed portion may be implemented as shown in FIGS. 1 and 2 . In this way, a plurality of dot-shaped second embossed portions are arranged in a row so as to draw the same predetermined pattern as the first embossed portion forming the arc seal portion, and may be linear, curved, wavy, Arbitrary configuration such as zigzag.

Furthermore, in the present invention, the plan view shape of each second embossed portion is not particularly limited, and in addition to the circular shape in the embodiment shown in FIGS. 1 and 2 , elliptical, triangular, quadrangular, Arbitrary shapes such as stars, straight lines, wavy lines, and geometric figures.

In addition, the size of each second embossed portion is not particularly limited as long as it has a plan view area smaller than the plan view area of each first embossed portion forming the arc seal portion. Any size determined by shape retention, leakage prevention of excrement, flexibility, and the like. By making each of the second embossed parts have a plan view area smaller than the plan view area of each of the first embossed parts forming the arc seal part, even if the second embossed part comes into contact with the wearer's thigh, groin, etc. It is not easy for the wearer to feel its hardness (that is, it is not easy to give the wearer a foreign body feeling), and the excellent performance achieved by the surface sheet (liquid-permeable sheet) having the above-mentioned specific uneven structure can be well maintained. wearing feeling.

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

FIG. 6 is a plan view of the panty line 10 according to still another embodiment of the present invention.

In the panty linen 10 of this embodiment, as shown in FIG. 6 , the first nonwoven fabric layer 2 of the liquid-permeable sheet constituting the top sheet has ridges 21 and grooves 22 along the line with the panty line 10 . The concave-convex structure 20 is formed by being alternately arranged in the second direction D ₂ corresponding to the width direction W of the pantiliner 10 , and the protruding strips 21 protrude toward the skin-opposing surface side in the thickness direction T of the pantiliner 10 and extend along the same direction as the pantiliner. The first direction D1 corresponding to the longitudinal direction L of ₁₀ extends continuously, and the groove portion 22 is recessed toward the non-skin-opposing surface side in the thickness direction T and extends continuously along the _first direction D1 . In addition, also in this pantiliner 10, the length in the _second direction D2 (that is, the direction corresponding to the width direction W of the pantiliner 10) in the state where the first nonwoven fabric layer 2 is stretched is longer than The second nonwoven fabric layer 3 is formed of a nonwoven fabric having a length in the _second direction D2.

Furthermore, as shown in FIG. 6 , the sanitary pad 10 also includes a circular arc seal portion R _S formed by a plurality of dot-shaped first embossed portions 8 in a plan view. are arranged along the outer peripheral edge portion of the pantiliner 10 at a position separated from the outer peripheral edge portion in the plane direction; The first outer peripheral edge portion E1 extending in _a direction parallel to the _first direction D1 (that is, located at both ends in the width direction W of the pantiliner 10 and extending along the approximate longitudinal direction L) and the arc seal portion _RS , and has a plan view area smaller than the plan view area of the first embossed portion 8 .

Therefore, also in this pantiliner 10, the above-mentioned second embossed portion 9 can be used to suppress the vicinity of the outer peripheral edge portion (ie, the first outer peripheral edge portion E1) of the _first nonwoven fabric layer 2 in the panty pad 10. When the edge 24 of the vicinity) is rolled up and protrudes toward the skin-opposing surface side Da, or protrudes outward in the plane direction, foreign body sensation and poor appearance due to the protrusion of the edge 24 are less likely to occur.

In addition, the present invention can be applied to various absorbent articles such as sanitary napkins and (light) incontinence pads, in addition to the panty liners of the above-described embodiments. In addition, the absorbent article of this invention is not limited to the above-mentioned embodiment, A combination, a change, etc. can be suitably combined in the range which does not deviate from the objective and the gist of this invention. In addition, in this specification, the serial numbers, such as "1st", "2nd", etc. are used for distinguishing the item with this serial number, and do not imply the order, priority, importance, etc. of each item.

Description of reference numerals

1. Panty liners (an example of absorbent articles); 2. First non-woven fabric layer; 20. Concave-convex structure; 21. Ribs; 22. Grooves; 23. Hollows; 3. Second none Textile layer; 4. Surface sheet (an example of a liquid-permeable sheet); 5. Intermediate sheet; 6. Back sheet (an example of a liquid-impermeable sheet); 7. Joint part; 8. First embossed part 9. 2nd embossing part; 10. Pantiliner (an example of absorbent article); 11. Release sheet; 12. Adhesive part.

Claims (8)

1. An absorbent article, comprising: a liquid-permeable sheet formed by joining a first nonwoven fabric layer 1 forming a skin-facing surface and a second nonwoven fabric layer 2 adjacent to the non-skin-facing surface of the first nonwoven fabric layer at a joint; and a liquid-impermeable sheet positioned closer to the skin-non-facing surface side than the liquid-permeable sheet,

the 1 st nonwoven fabric layer has a concavo-convex structure in which a projected line portion projecting toward the skin-facing surface side in the thickness direction of the absorbent article and continuously extending in the 1 st direction and a groove portion recessed toward the non-skin-facing surface side in the thickness direction and continuously extending in the 1 st direction are alternately arranged in the 2 nd direction orthogonal to the predetermined 1 st direction, and at least a part of the groove portion is joined to the 2 nd nonwoven fabric layer at the joining portion,

the 1 st nonwoven fabric layer is formed of a nonwoven fabric capable of forming the raised strip portions, the length of the nonwoven fabric layer in the 2 nd direction being longer than the length of the nonwoven fabric layer in the 2 nd direction in the stretched state,

the absorbent article includes:

a circular arc seal portion formed by a 1 st embossed portion, the 1 st embossed portion being disposed at least partially along an outer peripheral edge portion of the absorbent article at a position inwardly spaced from the outer peripheral edge portion, and the liquid-permeable sheet and the liquid-impermeable sheet being integrated in the thickness direction; and

and a 2 nd embossed portion which is disposed between the 1 st outer peripheral edge portion of the outer peripheral edge portions extending in a direction parallel to the 1 st direction and the arc seal portion, and which has a smaller plan view area than a plan view area of the 1 st embossed portion.

2. The absorbent article of claim 1,

the raised strip has a hollow interior configuration.

3. The absorbent article according to claim 1 or 2, wherein,

the 2 nd embossed portion is not disposed between the 2 nd outer peripheral edge portion of the outer peripheral edge portion extending in a direction parallel to the 2 nd direction and the circular arc seal portion.

4. The absorbent article according to claim 1 or 2, wherein,

the absorbent article has a longitudinal outer shape having a longitudinal direction and a width direction orthogonal to each other, and the 1 st direction is parallel to the width direction.

5. The absorbent article according to claim 1 or 2, wherein,

the 1 st nonwoven fabric layer and the 2 nd nonwoven fabric layer are joined together at the joining portion with an adhesive, and an adhesive non-existing region where the adhesive is not present is provided between the outer peripheral edge portion and the circular arc seal portion.

6. The absorbent article according to claim 1 or 2, wherein,

the 1 st nonwoven fabric layer has a thickness greater than that of the 2 nd nonwoven fabric layer.

7. The absorbent article according to claim 1 or 2, wherein,

the 2 nd embossed portion is disposed at a position overlapping at least the 1 st outer peripheral edge portion in a plan view.

8. The absorbent article according to claim 1 or 2, wherein,

the 1 st outer peripheral edge portion has an outer shape curved so as to protrude outward in the 2 nd direction in a plan view, and the 2 nd embossed portion is arranged along the outer shape of the 1 st outer peripheral edge portion.

Images