JP5132279B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article, and more particularly, to an absorbent article having standing portions on both sides.

  Some absorbent articles such as napkins and incontinence pads are processed on both sides in order to suppress lateral leakage of liquid or the like. For example, there is one in which both side portions of the surface layer and the absorbent sheet are folded and a slight level difference is provided on the side portion by the folded thickness (Patent Document 1). Moreover, there exists what provided the cylindrical solid wall which arrange | positioned the elastic sheet | seat on both sides of the napkin, and rolled up and turned this back (patent document 2). Further, there is a napkin in which a covering sheet and an absorbent layer are bent toward the wearer, and the above bent shape is maintained by a contraction force of an elastic member attached to this portion to form a three-dimensional wall (Patent Document 3).

JP-A-10-33588 JP 2001-170111 A JP 2002-291804 A

  An object of this invention is to provide the absorbent article which improved the prevention property of side leakage, such as a liquid. Another object of the present invention is to provide an absorbent article that exhibits the above-described excellent leak-proof property even when worn for a long time or when the amount of excreted liquid is large, and is gentle to the skin and has a good wearing feeling. Still another object of the present invention is to provide an absorbent article having the above-described excellent functions, having reduced material costs, and good production efficiency.

  The present invention is an absorbent having a liquid-permeable surface sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber disposed between the both sheets. The absorbent article has a pair of upright portions extending in the longitudinal direction on both sides in the width direction, and the upright portions are provided with the topsheet, the absorber, and the back surface without providing an elastic member. The sheet is folded in a loop so as to enclose the back sheet, and has a joint portion formed by joining the surfaces facing each other at the base of the standing part. The above object is achieved by the absorbent article.

  The absorbent article of the present invention has a high ability to prevent side leakage of liquids and the like, and can be suitably used as a napkin or incontinence pad. In addition, the absorbent article of the present invention exhibits the excellent effect of exhibiting the above-described excellent leak-proof property even when worn for a long time or when the amount of excretory fluid is large, and further exhibits a good wearing feeling. Furthermore, the absorbent article of the present invention does not require an extra member or processing for realizing the above-described excellent function, can be manufactured with high production efficiency, with reduced material costs.

Hereinafter, the absorbent article of this invention is demonstrated, referring drawings for the sanitary napkin which is the preferable embodiment.
FIG. 1 is a perspective view schematically showing a sanitary napkin as one embodiment (present embodiment 1) of the absorbent article of the present invention. FIG. 2 is an enlarged sectional view showing a section taken along line II-II in FIG. 3 is an enlarged cross-sectional view showing a cross section taken along line III-III in FIG. In addition, the form shown in FIGS. 1-3 is shown as the shape of the napkin when not worn, and when wearing, the surface sheet 1 side is brought into contact with the wearer's crotch, and the napkin is gently moved in the longitudinal direction (Y direction). Bend it to wrap it. The same applies to Embodiments 2 to 4 described later.

  The sanitary napkin 10 of Embodiment 1 includes a top sheet 1, an absorbent body 4, and a back sheet 2 (see FIGS. 1 to 3). A liquid-permeable material is normally used for the top sheet 1 and a liquid-absorbing / holding material is used for the absorber 4. Excreted liquid such as menstrual blood permeates the top sheet 1 and enters the internal absorber 4. Absorbed. The back sheet 2 is usually made of a liquid-impermeable material, so that the absorbed liquid can be cleanly absorbed and retained without being leaked toward the wearer's clothing.

  In the sanitary napkin 10 according to the first embodiment, standing portions 5 are provided on both sides in the width direction (see FIG. 1). In the present invention, “both sides” is not particularly limited as long as it is a functional position that is provided on the side in the width direction from the center (auxiliary line) c of the article and has an upright portion and exhibits lateral leakage prevention properties such as excretory fluid. For example, in the figure, when the width of the part where the absorbent body is arranged is roughly divided into four parts when the main body width of the article excluding the side wing 7 or the absorbent article is shown as the side part (auxiliary line) n It is preferable that the position is approximately 1/4 or 3/4.

  In the sanitary napkin 10 according to the first embodiment, the upright portion 5t of the central portion t is formed in a loop shape so that the top sheet 1, the absorber 4 and the back sheet 2 are integrated and the back sheet is wrapped inside. It is formed by bending (FIG. 2). It is preferable that an absorber having an appropriate thickness and having a shape maintaining property be bent together with the top sheet and the back sheet to obtain a favorable loop shape having a gently curved cross section as illustrated. The loop shape of the standing part is preferably an elliptical loop shape having a longitudinal direction in the height direction of the standing part as shown in the figure. By adopting such an elliptical loop shape, it is possible to make a standing part with a height, and the leakage preventing wall action is enhanced. In addition, as shown in the drawing, by placing the standing part inclined to the side of the article, a tray shape is formed by the standing parts on both sides and the article central part (the part between the side parts nn) ( As shown in FIG. 1, the action of reliably receiving excretory fluid while maintaining a good wearing feeling is preferred. Further, since the space 15 is held inside the standing part 5t, an appropriate cushioning property can be obtained when the wearer puts the standing part 5t between the crotch, and the skin contact around the base of the thigh is good. A feeling of fit is obtained.

  In the sanitary napkin 10 according to the first embodiment, the upright portion 5t further includes a joint portion 2a in which the back sheet 2 is bent and the surfaces facing each other are joined at the base portion 11 (FIG. 2). Although this joining method is not particularly limited, it may be joined by a pressure-sensitive adhesive usually used for joining this type of sheet, or may be joined by thermocompression bonding or the like. Since the back surface of the back sheet 2 is thus bonded and fixed at the base portion (base portion) 11 of the upright portion, the rising shape of the upright portion 5t is effectively raised and maintained, and the upright shape is maintained.

  For example, if the back sheet is joined entirely within the upright portion without being in the form of such a back sheet, the upright portion rises due to the shapeability and shape maintenance property of the absorbent body 4 at the beginning of the bending. However, the bent portion gradually falls in the direction d. In particular, once it is applied to the wearer's crotch, the upright part is pressed down and falls in the direction d, and no longer returns to the upright state. In other words, the standing state is not maintained, and the above-described loop shape and the appropriate cushioning property by the space 15 held inside the loop shape are not obtained, and the side leakage preventing action is not exhibited.

  In the present invention, the standing part 5 is formed by bending at least the top sheet, the absorber, and the back sheet in a loop shape and joining the back sheet at the standing part base as described above. In other words, the startup state is not maintained by tightening with an elastic member as in the prior art. Therefore, it is not necessary to use an elastic member, and the material cost can be reduced as compared with the conventional one. Further, since an elastic member that requires difficulty in handling in the process is not used, it is easy to manufacture, the manufacturing efficiency can be greatly improved, and it can be suitably applied to mass production.

  Furthermore, with regard to the conventional one that maintains the shape of the leak-proof wall by the elastic member, the wall portion is eventually projected to the wearer side by the tightening force of the elastic member, especially when applied to a soft skin part In addition, when worn for a long time, the wearing part may be somewhat uncomfortable or may become somewhat congested. Even in such a case, in the absorbent article of the present invention, as described above, there is no need to use an elastic member for the standing portion that becomes the leak-proof wall, and the form that is not over-tightened according to the mode and place to be worn. It can be. Furthermore, the space 15 held inside the upright portion exhibits air cushioning properties, imparts appropriate elasticity to the wearer, and can be suitably adapted to long-term use.

Upright portions 5t in the present embodiment 1 is maintained good launch configuration as described above, but this time start-up angle theta ₁ is not particularly limited, it is preferably 15 to 80 ° during the non wearing . In the present invention, unless otherwise specified, the rising angle of the upright portion is a line (X direction) formed by the line m connecting the joint 2a and the apex 5a of the upright portion 5 in the cross section of the article (see FIG. 2) and the article plane. The angle at which the line intersects. Further, the article central portion t, ends below the start-up angle theta ₁ of the standing portion 5t (front s, rear u) is preferably larger than the start-up angle theta ₂ and theta ₃ standing portion 5u in. Thereby, the central part of the article is usually where the excretory liquid concentrates, and the lateral leakage of the liquid or the like here can be effectively suppressed and prevented. In addition, as above-mentioned, the napkin of this Embodiment 1 is illustrated as a form at the time of non-wearing, and when standing, a standing part is normally brought into contact with skin and brought down. And if the standing part 5t is fallen, the elastic repulsive force which tries to stand up correspondingly will arise, and a clearance gap will not be given between a wearer's skin and an article main body. Further, this repulsive force exhibits a high side leakage prevention property that can cope with the undulation and movement of the wearer's skin. Therefore, it is preferable that the rising angle of the upright portion is functionally adjusted in the above range according to the shape and movement of the abutting body portion. When the erection and movement of the skin is large and the upright part 5t is not tilted so much, the upright angle can be increased to function as a leak-proof wall. You may make it the setting which does not give an uncomfortable feeling, maintaining the leak-proof effect by contact | adherence.
The height of the upright portion 5 (in the present invention, the height of the upright portion is defined as the distance from the joining portion 2a of the back sheet to the apex 5a of the upright portion, unless otherwise specified). It is preferable that the thickness is set to, for example, 5 to 50 mm in consideration of a good side leakage prevention property and a feeling of wearing.

In the sanitary napkin of the first embodiment, the emboss 8 is provided on the center c (FIG. 1) side from the base portion 11 of the standing portion and in the vicinity of the base portion 11. Although this embossing has the effect | action which joins and fixes the surface sheet 1 and the absorber 4, in this embodiment especially in order to show the raising promotion effect | action of the standing part 5t, it is preferable to provide this embossing 8 (FIG. 2). ). More specifically, it is preferable that the central part t in the longitudinal direction of the napkin does not leak sideways when the excretory liquid concentrates and a large amount of excretion occurs as described above. In such a case, by providing the emboss 8, the rising angle θ ₁ can be further increased, and the leak-proof property can be improved. Moreover, although the standing part 5t is normally pressed when it is worn and falls down in the direction d, it may be difficult to return to the standing state if the state is maintained for a long time. Even in such a case, by providing the emboss 8 described above, a good start-up action can be maintained for a long time even when worn for a long time. The position where the emboss 8 is provided is not particularly limited as long as it is on the center c side from the base 11 as described above, but is preferably within a range of 5 to 50 mm from the base 11 from the viewpoint of obtaining a sufficient start-up promoting action. .

In the sanitary napkin 10 according to the first embodiment, as illustrated in FIG. 2, an extending portion 12 that extends on the side of the standing portion 5 is provided. Here, although the extension part 12 is comprised from the surface sheet 1 and the back surface sheet 2, it may be any of them, or even if the absorber 4 and other functional members are further included. Good. To increase the start-up angle theta ₁ of the standing portion 5t, when considered to maintain startup maintenance action it is preferably has issued at least the backsheet 2 extending, topsheet 1 and the back as in the embodiment shown More preferably, the sheet 2 extends.

Next, the standing part 5u in the rear part u of the sanitary napkin of Embodiment 1 will be described (FIG. 3). The standing portion 5u is in a loop-like standing state that maintains the rising shape. Specifically, the upright portion 5u is bent so that the top sheet 1, the absorbent body 4, and the back sheet 2 are integrated, and the back sheet 2 is included, and the opposite surfaces of the back sheet 2 are at the base 11. It has the joined part 2a joined. However, unlike the standing part 5t of the center part t described above, the emboss 8 is not provided. The rear part u of the napkin is not usually a part where the excretory liquid concentrates, but it is required to improve the feeling of wear given to the wearer at the same time or more than preventing side leakage. This rear part u is usually along the wearer's buttocks, but as the transition from the crotch to the buttocks, the burst becomes shallower. For this reason, if the standing part which protrudes too much continues to the rear end of the napkin, the wearer may feel uncomfortable. From this point of view, the start-up angle theta ₂ of the upright portion 5u in the rear u as in the first embodiment, it is preferable to reduce from the start-up angle theta ₁ of the standing portion 5t in the central portion u. But not limited rear standing portion 5u startup angle theta ₂ is particularly, it is preferable that the during the non worn example 5 ° to 50 °. This rising angle theta ₂ also according to the shape and movement of abutting the body may be adjusted functionally. In particular, the napkin 10 according to the first embodiment is preferable in that the rising angle of the upright portion is gradually reduced from the central portion t to the rear portion u. By adopting a form in which the rising angle of the standing part gradually decreases as the rear part of the napkin is formed, the fitting property is improved in order to closely adhere to the change in the depth of the wearer's crack described above, and A feeling of wear improves.

In the sanitary napkin 10 of the first embodiment (FIG. 1), the front portion s is also provided with an upright portion 5s (not shown as a cross-sectional view). It is preferable that the rising portion 5s has a small rising angle, similar to the rising portion 5u in the rear portion u. This is preferable because it fits along the contour of the lower abdomen of the wearer at the front end of the napkin as in the rear u. A preferable range of the rising angle θ ₃ (not shown) in the upright portion 5S of the front portion s is substantially the same as θ ₂ described above. In the napkin 10 of the first embodiment, similarly to the rear part u, the rising angle of the rising part gradually decreases toward the end part in the front part s, which is preferable.

  The sanitary napkin 10 according to the first embodiment is normally long, and is worn along the front part s along the lower abdomen of the wearer, the central part t along the crotch part, and the rear part u along the buttocks. In the first embodiment, as described above, the rising angles of the standing parts 5 (the front standing part 5s, the central standing part 5t, and the rear standing part 5u) are different from each other. In this way, in the first embodiment, the absorber 4 is provided with a constricted portion 4a having a narrow width in the width direction in order to set the rising portion 5 to a desired rising angle at a predetermined portion (FIG. 1). reference). Specifically, a constriction 4a is provided around the boundary (auxiliary line) 13 between the central part t and the front part s of the napkin and the boundary (auxiliary line) 14 between the central part t and the rear part u. The rising angle of the upright portion 5 is changed with a gap therebetween.

  The constriction depth of the constricted portion 4a is not particularly limited. However, when the sanitary napkin is used, it is preferable that the constricted depth is approximately the same as the height of the upright portion 5 as shown in FIG. In other words, it is preferable that the bottom portion of the constricted portion 4a (the portion having the narrowest width in the absorber 4) coincides with the position of the substantially base portion of the upright portion 11. By doing so, the absorber is arranged without gaps in the central region (region between the side lines nn) while maintaining the rising angle of the rising portions 5 on both sides, and collected without leaking excretory fluid. can do. Although the positions of the boundaries 13 and 14 are not particularly limited, it is preferable that the region where the excretory fluids and the like are concentrated is functionally divided as the central portion t.

  In the sanitary napkin 10 according to the first embodiment, the absorber 4 is disposed inside the upright portion 5. Therefore, the upright portion 5 not only exhibits a leak-proof wall action that prevents the excretory fluid from flowing sideways, but also has an absorption holding action in which the upright portion 5 itself absorbs and collects the excreted fluid and the like. Accordingly, it is possible to reliably prevent side leakage even when a large amount of liquid that cannot be dammed is concentrated and excreted, particularly at the article center t. In addition, even when there is a gap between the standing part and the wearer's skin with the wearer's movement, the standing part 5 preferably takes in the excretion fluid in the gap and does not escape sideways. .

  Further, in the sanitary napkin 10 according to the first embodiment, the upright portion 5 is formed in a loop shape having a space 6 therein, and this loop shape is continuous over the longitudinal direction of the napkin (see FIG. 1 to 3). For this reason, the internal space 15 is continuous in a cylindrical shape, and exhibits a ventilation effect of taking in outside air as if this cylindrical space breathed. Thereby, favorable air permeability is obtained especially around the base of the thigh of the wearer, and a smooth wearing feeling without stuffiness is obtained. Such ventilation is the same in Embodiments 2 to 4 described later.

The material used as the top sheet 1 is not particularly limited as long as it is usually used for absorbent articles, but is a nonwoven fabric made of synthetic fibers such as polyethylene, polypropylene, polyester and polyethylene-polypropylene composite fibers, polyethylene-polypropylene composite fibers, etc. It is preferable to use an apertured film in which a film of polyethylene or polyethylene is apertured. Although the thickness of the surface sheet 1 is not specifically limited, It is preferable that it is about 0.5-5 mm, and it is preferable that basic weight is 10-100 g / m < ² >. In the present invention, the thickness of the sheet including the absorber, which will be described later, refers to a sheet having a size of about 100 mm in length × width, dial gauge manufactured by Ozaki Seisakusho, Peacock NO. 207 refers to a value measured by placing a plate (thickness 3 mm × length 37 mm × width 37 mm, made of acrylic) adjusted to have a pressure of 2.5 g / cm ² on a movable stand attached to a movable stand. In addition, when using combining a some sheet | seat, said thickness is the total thickness of these, and the said basic weight is these average basic weights.

The material used as the absorbent body 4 is not particularly limited as long as it is normally used for absorbent articles, but examples thereof include absorbent paper, nonwoven fabric, and pulp sheet obtained by forming fibers into a sheet with a binder. , Fluff pulp, and a sheet formed by mixing a superabsorbent polymer into a fiber to form a sheet. In addition, as a sheet | seat formed by mixing a superabsorbent polymer with a fiber and forming in a sheet form, any of the superabsorbent polymers dispersed in a layer form can be used. Materials used for the absorbent sheet and polymer sheet include cellulose fibers such as wood pulp, regenerated cellulose fibers such as rayon and cupra, hydrophilic synthetic fibers such as polyvinyl alcohol fibers and polyacrylonitrile fibers, or surface active Polyethylene, polypropylene, polyethylene terephthalate, polyethylene / polypropylene composite fiber, and polyethylene / polyethylene terephthalate composite fiber whose surface has been hydrophilized with an agent or the like are preferred. From the viewpoint of maintaining good hydrophilicity, it is more preferable to use cellulose fiber. preferable. Although the thickness of the absorber 4 is not specifically limited, It is preferable that it is about 0.3-20 mm, and it is preferable that basic weight is 50-500 g / m < ² >. In addition, when using combining a some absorber, said thickness is the total thickness of these, and the said basic weight is these average basic weights.

The material used for the back sheet 2 is not particularly limited as long as it is normally used for absorbent articles, but it is preferable to use a laminated nonwoven fabric obtained by laminating a nonwoven fabric and polyethylene and a polyolefin waterproof film such as polyethylene. Although the thickness of the back surface sheet 2 is not specifically limited, It is preferable that it is about 0.1-1 mm, and it is preferable that basic weight is 10-100 g / m < ² >. In addition, when using combining a some sheet | seat, said thickness is the total thickness of these, and the said basic weight is these average basic weights.

  The sanitary napkin of Embodiment 1 can be manufactured by a normal manufacturing method of this type of product, and is not particularly limited. Speaking of a preferable processing method of the upright portion 5, the back sheet 2 is laminated after the top sheet 1 and the absorber 4 are overlapped. At this time, it is preferable that the surface sheet 1, the absorbent body 4, and the back sheet 2 are bonded and fixed in advance for the portions (both sides of the article precursor) that are folded into a loop shape to form the standing portions 5. After giving the perimeter seal 9, the side part of the article precursor containing the absorber 4 is mountain-folded into a loop shape, and the folded root part is joined with an adhesive or the like (joined part 2a). In addition, the absorber part (absorber part of the article precursor on both sides of the article precursor) fixed in advance to the back sheet 2 is folded with the back side recessed, and is folded together with the back sheet 2, but is not fixed ( Absorber portions other than both sides of the article precursor maintain a planar shape that is not broken by the rigidity of the absorber itself. Further, the emboss 8 can be provided after the top sheet 1 and the absorber 4 are overlapped.

  FIG. 4 is a perspective view schematically showing a sanitary napkin as another embodiment (second embodiment) of the absorbent article of the present invention. FIG. 5 is an enlarged cross-sectional view showing a cross section taken along line VV in FIG. FIG. 6 is an enlarged sectional view showing a section taken along line VI-VI in FIG.

The sanitary napkin 20 according to the second embodiment includes a top sheet 1, an absorbent body 4, and a back sheet 2 as in the first embodiment. And the standing part 5t in the center part t is made into the same structure as this Embodiment 1. FIG. That is, the top sheet 1, the absorber 4, and the back sheet 2 are bent together so as to enclose the back sheet 2 (see FIG. 5). Further, the opposite surfaces of the back sheet are joined to each other at the base portion of the upright portion 5t (joint portion 2a), and an embossing 8 for promoting a rising action is disposed on the center side of the base portion. It is the same as in the first embodiment that the top sheet 1 and the back sheet 2 protrude from the side of 5t. Each entry in this manner, such as dimensions and startup angle theta ₁ in cross-section of the upright portion 5t of the second embodiment is the same as the upright portion 5t in the present embodiment 1, the preferred ranges are also the same is there.

  The upright portion is not formed on the rear portion u of the sanitary napkin of the second embodiment. Specifically, as shown in FIG. 6, only the topsheet 1 is bent, but the bent portion 51 does not include the absorber 4 and the backsheet 2, but the space 16 can be formed but does not stand up. . Thus, in the rear part u of the sanitary napkin, it is preferable to use the bent bent part 51 without providing an upright part, so that the fit property from the crack that contacts the wearer to the buttocks increases. In addition, this is preferable because it is possible to prevent a step, an outline, and the like from being raised when wearing an article under thin clothing, and to wear it inconspicuously and without conspicuousness. However, the space 16 can be continuous with the space 15 inside the upright portion 5t of the central portion t, and the above-described ventilation action can be obtained. In addition, although it is not necessary to join the surface sheet 1 in the base part of the bending part 51, it is not joined, but in this Embodiment 2, it is joined in the junction part 1a.

  In the sanitary napkin 20 of the second embodiment, a bent portion 52 is further provided on the back sheet side at the rear portion u. The bent portion 52 is provided corresponding to the upright portion 5t. That is, in the central part t, the back sheet 2 is bent and looped to form the upright part 5t (FIG. 5), but in the rear part u, the back sheet 2 is formed with respect to the stretched absorber 4. There is a surplus. In this Embodiment 2, it respond | corresponds by making the surplus part of this back surface sheet 2 into the bending part 52. FIG.

  In the sanitary napkin 20 according to the second embodiment, the front part s is not formed with an upright part, but is provided with the folded bent parts 51 and 52 similar to the rear part u described above. ing. By doing in this way, a feeling of wear of a lower abdomen can be improved and fit nature can be improved.

  In the sanitary napkin 20 of the second embodiment, in order to provide a good upright portion 5t only at the central portion t as described above, the constricted portion 4a of the absorbent body and the back sheet are provided at the boundaries (auxiliary lines) 13 and 14. Two notches (slits) 2b are provided (see FIG. 4). By providing the constricted portion 4a in this manner, the absorber 4 is bent only at the central portion t (see FIG. 5), and the absorber 4 is extended flat at the other front portions s and rear portions u. (See FIG. 6). Furthermore, by providing the cut portion 2b, the back sheet 2 is bent in a loop shape only at the central portion t (see FIG. 5), and the other front portion s and rear portion t correspond to the extended shape of the absorber 4. Thus, the bent portions 51 and 52 can be bent outward or inward.

  FIG. 7 is a perspective view schematically showing a sanitary napkin as still another embodiment (third embodiment) of the absorbent article of the present invention. FIG. 8 is an enlarged sectional view showing a section taken along line VIII-VIII in FIG. FIG. 9 is an enlarged cross-sectional view showing a cross section taken along line IX-IX in FIG.

  The sanitary napkin 30 according to the third embodiment includes a top sheet 1, two absorbent bodies (the long absorbent body 41 and the central absorbent body 42), and the back sheet 2. And the standing part 5 (5t) is provided in the center part t in the both sides n of a napkin. The upright portion 5t is formed integrally with the top sheet 1 and the back sheet 2 with the central absorber 42 interposed therebetween, and is bent in a loop shape at both side portions u so as to enclose the back sheet 2 (see FIG. 7). And the mutually opposing surface of the back surface sheet 2 is joined in the base part of the standing part 5t (joint part 2a), and the rising promotion emboss 8 is formed on the center c side of the base part (see FIG. 8). That is, the cross-sectional shape of the upright portion 5t in the third embodiment is the same as that in the first embodiment, and the preferable ranges of dimensions and angles are also the same.

  In the third embodiment, a long absorbent body 41 is arranged below the central absorbent body 42 described above. In this way, by combining the two absorbers, when the upright portion 5 is formed only at the central portion t, both absorbers 41 and 42 can be made substantially rectangular, which is easy to manufacture and increases manufacturing efficiency. This is preferable. Moreover, a separate function can be provided to each of the absorbers 41 and 42. For example, the liquid absorbability required for the central portion t is particularly imparted to the central portion absorber 41, and the wearing feeling and liquid diffusibility required for the front portion s and the rear portion u are particularly imparted to the long absorber 42. Can do.

  In the rear portion u of the third embodiment, a bent portion 53 is disposed on the side of the side portion n so that the topsheet 1 and the backsheet 2 are folded so as to lie down on the topsheet 1 side (see FIG. 9). . The bent portion 53 is formed continuously from an upright portion 5t formed at the central portion t. Therefore, the loop-shaped space 15 of the upright portion 5t is continuous over the space 16 inside the bent portion, and the above-described ventilation action is obtained. Further, the improvement in the feeling of wearing and the improvement of the fit due to the folded bent shape without providing the standing part at the rear part u are the same as in the second embodiment described above.

  In the third embodiment, the front part s has the same form as the bent part 53 in the rear part u. Here, the action of the folded folded shape is the same as that of the rear part u described above.

  FIG. 10 is an enlarged cross-sectional view schematically showing a periphery of an upright portion of still another embodiment (Embodiment 4) of the absorbent article of the present invention. The figure shows the same cross section as the cross section taken along the line II-II of the central portion t shown in FIG.

  In this Embodiment 4, the surface sheet 1 is comprised by the center part sheet | seat 1a and the side part sheet | seat 1b. Thus, by dividing | segmenting the surface sheet 1 into two or more members, the sheet | seat provided with the function calculated | required in each place can be applied, and it is preferable. The material of the central sheet 1a is the same as the preferable material of the top sheet 1 described above. As for the side sheet 1b, a preferable material of the top sheet 1 described above having water repellency is preferable, and a film material such as the back sheet 2 may be used. In the present invention, the water repellency means a property of repelling water on the sheet surface.

  In the standing part 5 (5t) of the fourth embodiment, the end part 4b of the absorbent body 4 is arranged in a part beyond the vertex 5a of the standing part 5. The position of the end 4b of the absorbent body 4 is not particularly limited as long as the upright part 5 having a loop shape can be obtained, and varies depending on the material and thickness of the absorbent body 4, the height of the upright part, etc. As shown in Fig. 5, it is preferable that a good loop shape is obtained by arranging the absorber end 4b beyond the upright apex 5a.

  The absorbent article of the present invention is not limited to the above-described Embodiments 1 to 4, and for example, other functional members may be applied, and embossing or the like may be provided as appropriate. In the present invention, the absorbent article is not particularly limited and includes articles having absorbency such as liquid, but is preferably a sanitary napkin, an incontinence pad, or a disposable paper diaper, more preferably a sanitary napkin or an incontinence pad. preferable.

It is a perspective view showing typically a sanitary napkin as one embodiment of an absorptive article of the present invention. It is an expanded sectional view which shows the II-II line cross section in FIG. It is an expanded sectional view which shows the III-III line cross section in FIG. It is a perspective view which shows typically the sanitary napkin as another embodiment of the absorbent article of this invention. It is an expanded sectional view which shows the VV line cross section in FIG. It is an expanded sectional view which shows the VI-VI line cross section in FIG. It is a perspective view which shows typically the sanitary napkin as another embodiment of the absorbent article of this invention. It is an expanded sectional view which shows the VIII-VIII line cross section in FIG. It is an expanded sectional view which shows the IX-IX line cross section in FIG. It is an expanded sectional view showing typically the upright part of another embodiment in the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface sheet 1a Center part sheet | seat 1b Side part sheet | seat 2 Back surface sheet 2a Back surface sheet junction part 2b Cut part (slit)
4 Absorber 4a Constricted part (narrow part)
4b Absorber end part 5, 5s, 5t, 5u Standing part 5a Standing part apex 7 Side wing part 8 Emboss 9 Full-circumferential seal 10, 20, 30 Sanitary napkin 11 Standing part base 12 Extension part 13, 14 Boundary auxiliary line 15, 16, 17 Space 41 Long absorbent body 42 Central absorbent body 51, 52, 53 Bent part

Claims (1)

A sanitary napkin having a liquid-permeable surface sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent disposed between the both sheets. ,
The sanitary napkin has a pair of standing portions extending in the longitudinal direction on both sides in the width direction,
The standing portion is formed by looping the top sheet, the absorbent body, and the back sheet so as to enclose the back sheet without providing an elastic member, at the base, the back sheet have a junction formed by joining the opposed surfaces together, has a space inside the upright portion formed by bending the loop,
The upright portion has a rising angle inclined outward in the width direction of the sanitary napkin,
At least the top sheet or the back sheet extends outward in the width direction side of the upright part, the top sheet is composed of a center sheet and a side sheet, and the side sheet surface is water-repellent. ,
When the longitudinal direction of the sanitary napkin is divided into a central part, a front part, and a rear part, a constricted part in which both side parts of the absorbent body are narrowed and the periphery of the boundary between the central part and the front part and the rear part The sanitary napkin has a notch portion on the back sheet, and the standing portion is disposed only around the excretion region at the center of the sanitary napkin .

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