Absorbent articles

Abstract

To prevent discharged urine from passing a slit provided on an absorber and leaking from a back part with vigor.SOLUTION: An absorbent article covers the abdominal part, a crotch part and a back part of a wearer who wears the absorbent article, and includes: an absorber having a pair of grooves extending in a longitudinal direction; and three-dimensional gathers which are arranged on both sides in a width direction of the absorber, adhere one end outside in the width direction to the absorber, and form an adhesive surface, make the other end ahead of standing lines formed at an end part inside the width direction of the adhesive surface a free end, and adhere the free end to the wearer's skin surface with elastic members. At least a part of an end part on the back part side of the pair of grooves faces in the direction crossing the standing lines of the three-dimensional gathers.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] Absorbent articles such as disposable diapers, incontinence pads, sanitary products, etc. have been developed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-175885 A Summary of the Invention [Problem to be solved by the invention]

[0004] It is considered that a groove extending from the abdomen of the user through the crotch portion toward the back when worn by the user is arranged in the absorbent body of the absorbent article. In the case of such a structure, it is considered that urine excreted by the user passes through the groove, and the urine is spread over the entire surface of the absorbent body. Therefore, it is expected that the absorption efficiency of urine excreted by the user is improved. However, in such a structure, it is expected that urine that passes through the end of the back side of the groove, for example, will seep onto the top sheet. Therefore, there is a possibility of back leakage.

[0005] Therefore, the present invention aims to provide a technology for suppressing the speed of urine passing through the longitudinal end of a groove when the absorbent body of an absorbent article worn by a user has a groove extending in a direction from the user's abdominal side to the dorsal side. [Means for solving the problem]

[0006] In order to solve the above problems, in the present invention, the shape of the longitudinal end portion of the groove is devised so that urine passing through the groove also flows in the width direction of the absorbent article.

[0007] In detail, the present invention is an absorbent article that covers the abdomen, crotch and back of a wearer when worn by the wearer, comprising: an absorbent body having a pair of grooves extending in the longitudinal direction; and three-dimensional gathers that are arranged on both widthwise outer sides of the absorbent body, one end of the widthwise outer side being adhered to the absorbent body to form an adhesive surface, the other end of which is a standing line that is a line formed at the widthwise inner end of the adhesive surface being a free end, and which are biased by an elastic member to adhere closely to the skin surface of the wearer, wherein at least a portion of the ends on the back side of the pair of grooves are oriented in a direction that intersects with the standing line of the three-dimensional gathers.

[0008] At least a part of the abdominal end portions of the pair of grooves may be oriented in a direction intersecting with the standing line of the standing gathers.

[0009] The ends of the pair of grooves may be approximately fan-shaped, and the approximately fan-shaped arc portions of the ends may be formed in a direction intersecting with the standing line of the three-dimensional gathers from the extension direction of the pair of grooves.

[0010] The pair of grooves may bend in the width direction from a position corresponding to the crotch portion toward the ends, and the extending direction of the ends of the pair of grooves may be a direction intersecting the standing line of the three-dimensional gathers.

[0011] The width of the end portion may be wider than the width of the pair of grooves at a position corresponding to the crotch portion. stomach.

[0012] The depth of the end portion may become gradually shallower from a position corresponding to the crotch portion toward a position corresponding to the back portion.

[0013] The pair of grooves each have a bottom surface, an inclined line rising toward the widthwise center, and an inclined line rising toward the left and right ends in the widthwise direction, and the inclined lines rising toward the left and right ends in the widthwise direction may have a smaller inclination than the inclined lines rising toward the widthwise center.

[0014] It may also be provided with a first elastic member extending in the width direction of at least one of the longitudinal ends of the pair of grooves, being stretched in the width direction, and capable of expanding and contracting the widthwise side portion of the end in the direction in which the width of the end increases.

[0015] The absorbent article may further include a second elastic member that is arranged at a predetermined distance from the back end of the absorbent body in the longitudinal tip direction when the absorbent article is worn by the wearer, and is stretchable in the width direction, and the distance between the pair of grooves may be such that contraction of the second elastic member prevents the end from contracting in the width direction by more than a predetermined length. Effect of the Invention

[0016] According to the present invention, when the absorbent body of an absorbent article worn by a user has a groove extending in a direction from the user's abdominal side to the back side, when the absorbent body has a groove extending in a direction from the user's abdominal side to the back side, the flow speed of urine passing through the longitudinal ends of the groove can be reduced and the flow direction can be changed, thereby suppressing back leakage. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is an external perspective view of a diaper according to an embodiment. [Diagram 2] FIG. 2 is an example of a developed view of a diaper. [Diagram 3] FIG. 3 illustrates an outline of forming slits in an absorbent body. [Figure 4] FIG. 4 is an example of a developed view of the diaper according to the first modified example. [Diagram 5] FIG. 5 is an example of a developed view of the diaper according to the second modified example. [Figure 6] FIG. 6 is an example of a developed view of a diaper according to the third modified example. [Figure 7] FIG. 7 is a first example of a widthwise cross-sectional view of the diaper. [Figure 8] FIG. 8 is a second example of a widthwise cross-sectional view of the diaper. [Figure 9]FIG. 9 is an example of a developed view of a diaper according to the fourth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, absorbent articles according to embodiments of the present invention will be described with reference to the drawings. Note that the configurations of the following embodiments are merely examples, and the present invention is not limited to the configurations of these embodiments.

[0019] <Embodiment> In this embodiment, the longitudinal direction of a pants-type disposable diaper (an example of an "absorbent article" in the present application, hereinafter simply referred to as a "diaper") is the direction connecting the front body arranged opposite the abdomen of the user and the rear body arranged opposite the back. Between the front body (one side in the longitudinal direction) and the rear body (the other side in the longitudinal direction) (the center in the longitudinal direction), a crotch part arranged under the crotch of the user (opposed to the crotch). In addition, when the paper diaper is worn by a user (hereinafter abbreviated as "worn state"), the side facing the user's skin (the inner side when worn) is the skin-facing side, and the opposite side to the skin-facing side (the outer side when worn) is the non-skin-facing side. Furthermore, the direction connecting the skin-facing side and the non-skin-facing side is the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is the width direction. In addition, the view from the thickness direction is the planar view.

[0020] Fig. 1 is a perspective view of the appearance of a diaper according to the present embodiment. The diaper 1 has a crotch region 1B which corresponds to the crotch region that covers the pubic area of ​​a user when worn, a front body region 1F which is located in front of the crotch region 1B and corresponds to the front body of the user, and a back body region 1R which is located behind the crotch region 1B and corresponds to the rear body of the user.

[0021] In the diaper 1, a top sheet, an absorbent, a back sheet, and a cover sheet 4 are laminated in this order from the skin side (only the cover sheet 4 is shown in Fig. 1). The top sheet is liquid permeable in part or in whole. Therefore, when the diaper 1 is worn, liquid excreted by the user passes through the top sheet, which may come into contact with the user's skin. The liquid is then absorbed by the absorbent, which is disposed on the non-skin side of the top sheet. Examples of materials that can be used for the top sheet include woven fabric, nonwoven fabric, and porous film. The top sheet may also be hydrophilic.

[0022] The absorbent body is capable of absorbing and retaining liquid and is arranged from the front body region 1F to the back body region 1R, centered around the crotch region 1B (details will be described later). The absorbent body is made of short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been hydrophilized, and granular absorbent resin such as SAP (Super Absorbent Polymer), which is a hydrophilic polymer with a crosslinked structure that can absorb and retain water, is held in the gaps between the short fibers. The absorbent body may be wrapped in a liquid-permeable core wrap sheet to maintain its structure.

[0023] The cover sheet 4 may be made of a nonwoven fabric made of a liquid-impermeable thermoplastic resin, for example, to prevent leakage of excrement. Examples of liquid-impermeable thermoplastic resins include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single-layer structure, and may be a multi-layer structure having an inner cover sheet and an outer cover sheet.

[0024] The back sheet is a sheet formed from a liquid-impermeable thermoplastic resin material to suppress leakage of excrement, similar to the cover sheet 4. The back sheet is preferably made of a material that also has moisture permeability to suppress stuffiness when worn.

[0025] The diaper 1 is provided with waist gathers 3 (an example of the "second elastic member" of the present disclosure) at a portion surrounding the user's abdominal circumference to prevent the formation of a gap between the diaper 1 and the user's skin that could serve as a liquid outflow path. The diaper 1 is also provided with three-dimensional gathers 3BL, 3BR at a portion surrounding the user's thighs for the same purpose. The three-dimensional gathers 3BL, 3BR and the waist gathers 3 are in close contact with the user's skin by the elasticity of the rubber thread. Thus, liquid discharged from the user's pubic region is absorbed by the absorbent body of the diaper 1 with almost no leakage from the diaper 1. The diaper 1 is fixed to the user's body in a state in which it surrounds the user's abdominal circumference and thighs. Since the diaper 1 is fixed to the user's body in this manner, the user can stand and walk around while wearing the diaper 1.

[0026] The diaper 1 also has a tummy gather 2 (an example of the "first stretchable member" of the present disclosure) provided on the crotch side of the waist gather 3 in the back body region 1R. The tummy gather 2 is formed to be stretchable by attaching a stretched rubber thread in the width direction to the cover sheet 4, which is the exterior body of the diaper 1.

[0027] In the diaper 1 shown in FIG. 1, the front body region 1F, the crotch region 1B, and the rear body region 1R are formed separately, and these three regions are aligned in the longitudinal direction and welded together. Alternatively, the diaper 1 may have the front body region 1F, the crotch region 1B, and the rear body region 1R formed integrally.

[0028] Fig. 2 is an example of a developed view of the diaper 1 as viewed from the non-skin side. Note that in Fig. 2, the cover sheet 4 and the back sheet 5 are omitted.

[0029] As shown in FIG. 2, the absorbent body 6 is divided into a plurality of parts in the longitudinal direction. Each absorbent body 6 is provided with a slit 8 (an example of a "groove" in the present disclosure). The slit 8 penetrates the absorbent body 6 in the thickness direction. The slits 8 are provided, for example, in pairs in the longitudinal direction so as to be positioned from the crotch region 1B to the rear body region 1R of the user when worn by the user. The number of slits 8 may be one or three or more. The width of the center portion in the longitudinal direction of each slit 8 is uniform. Therefore, urine passes through the slits 8 and spreads uniformly in the absorbent body 6.

[0030] Moreover, the ends 81 (an example of the "first end" in this disclosure) of the two slits 8 on the rear body region 1R side are disposed at approximately the same location in the longitudinal direction. The inner end in the width direction of the tummy gathers 2 (an example of the "second end" in this disclosure) is disposed widthwise outside such end 81 and the end 82 of the slit 8 on the front body region 1F side. A portion of the rubber thread 22 forming the tummy gathers 2 is welded to the absorbent body 6. Note that a portion of the rubber thread 22 may be welded to the back sheet 5 (described later) to which the absorbent body 6 is attached.

[0031] In this embodiment, the stretchable waist gather 3 is mainly formed by the first contraction portion S1 formed in the first waist region RW1 and the second contraction portion S2 formed in the second waist region RW2. The waist gather 3 improves the fit of the diaper 1 around the wearer's waist by the contraction force of the first rubber threads 4F1, 4R1 and the second rubber threads 4F2, 4R2. In the first contraction portion S1 of the waist gather 3, a plurality of first rubber threads 4F1, 4R1 are arranged parallel to each other at a constant interval A1. In addition, in the second contraction portion S2 of the waist gather 3, a plurality of second rubber threads 4F2, 4R2 are arranged parallel to each other at a constant interval A2. The interval between the rubber threads here means the distance between adjacent rubber threads in the longitudinal direction of the diaper 1.

[0032] In this embodiment, the first elastic threads 4F1, 4R1 in the first waist region RW1 and the second elastic threads 4F2, 4R2 in the second waist region RW2 extend across the entire width of the cover sheet 4. Therefore, after the diaper 1 is completed, the first elastic threads 4F1, 4R1 and the second elastic threads 4F2, 4R2 form a substantially annular elastic member that goes around the waist opening. In other words, after the diaper 1 is completed, the waist gathers 3 (the first contracted portion S1, the second contracted portion S2) are formed across the entire circumference in the waist direction.

[0033] The elastic threads 22 arranged in the tummy gathers 2 are arranged parallel to one another at a constant interval A3. In this embodiment, the interval A3 between the elastic threads 22 in the tummy gathers 2 is set to a dimension larger than the interval A2 between the second elastic threads 4F2, 4R2 in the second contracted portion S2 of the waist gathers 3. This makes it easier to spread the tummy gathers 2, which come into contact with the hip bones of the wearer, than the waist gathers 3 when the waist opening is spread to put on the diaper 1.

[0034] The absorbent 6 on the rear body region 1R side is disposed so as to overlap the longitudinal end of the waist gather 3. The slit 8 is disposed, for example, about 130 mm (shortest distance in size M) (an example of the "predetermined distance" in the present disclosure) away from the longitudinal end of the waist gather 3 in the rear body region 1R. The basis weight of the absorbent 6 in the region 83 between the lower end of the waist gather 3 and the end 81 of the slit 8 is about 180 g / m 2 (number one (Grammar weight of pulp of M size with low grammage). In addition, when the diaper 1 is worn by a user, the waist gathers 3 expand, for example, by about 44 cm, and the contraction force is about 2.4 N (M size in Example 4 of JP 2020-195550 A). The longitudinal length of the region 83 may be 130 mm or more, and the grammage of the absorbent body 6 in the region 83 is about 180 g / m 2 It may be more than that.

[0035] Furthermore, the absorbent body 6 on the front body region 1F side overlaps with the waist gathers 3. The ends 82 of the slits 8 extend to the vicinity of the ends of the waist gathers 3 in the longitudinal direction.

[0036] Fig. 3 illustrates an overview of forming slits 8 in the absorbent body 6. Fig. 3(A) illustrates an overview of the process of forming slits 8 in the absorbent body 6. Fig. 3(B) illustrates a side view of a diaper 1 including an absorbent body 6 in which slits 8 have been formed.

[0037] As shown in Fig. 3(A), a mesh plate 50 having a plurality of holes penetrating in the thickness direction is fixed in a predetermined position. A protrusion 51 protruding in the thickness direction is fixed to the center of the mesh plate 50 in the longitudinal direction. The protrusion 51 is tapered at both ends in the longitudinal direction so that the width gradually decreases toward the upper side. The thickness of the center of the protrusion 51 in the longitudinal direction is uniform. The taper angle may be, for example, about 45 degrees.

[0038] Then, defibrated pulp, which is the raw material of the absorbent body 6, is sent from above in FIG. 3(A) toward the mesh plate 50. Then, when the air carrying the defibrated pulp passes through the holes in the mesh plate 50, the defibrated pulp is deposited on the mesh plate 50. Then, a mat-shaped absorbent body 6 is formed. On the other hand, since no holes are arranged in the part where the protrusions 51 are provided, it does not become a passage for the air carrying the defibrated pulp. Therefore, the defibrated pulp does not deposit on the protrusions 51. Note that the protrusions 51 may be provided with holes with an inner diameter smaller than that of the holes in the mesh plate 50. Even with such protrusions 51, the air permeability is lower than that of the mesh plate 50, so the defibrated pulp does not deposit.

[0039] After the defibrated pulp is piled up on the mesh plate 50, the mesh plate 50 including the protrusions 51 is pulled downward as shown in FIG. 3(B). Then, the absorbent body 6 having the slits 8 is formed. FIG. 3(B) shows an example in which the slits 8 are formed in the absorbent body 6 arranged in the rear body region 1R. The lower surface of the absorbent body 6 in FIG. 3(B) becomes the skin side when incorporated in the diaper 1. The right end of the absorbent body 6 in FIG. 3(B) becomes the back end in the longitudinal direction when incorporated in the diaper 1. The end 81 of the slit 8 formed as shown in FIG. 3(B) is tapered at about 45 degrees. The depth of the central portion in the longitudinal direction of the slit 8 is uniform. The slits 8 are formed in the absorbent body 6 arranged in the front body region 1F in the same manner.

[0040] 3(B), the upper surface of the absorbent body 6 in which the slits 8 are formed is attached to a back sheet 5 (not shown) to which hot melt is applied. However, the opening of the slits 8 is not attached to the back sheet 5, and is assembled in a non-adhered state to the back sheet 5. Note that a part of the absorbent body 6 other than the vicinity of the slits 8 may be in a non-adhered state, not attached to the back sheet 5.

[0041] [Actions and Effects] In the diaper 1 as described above, the outer side surfaces in the width direction of the end portions 81, 82 (one example of the "side portions in the width direction of the end portions" in the present disclosure) are pulled outward in the width direction by the tummy gathers 2. This causes the width of the end portions 81, 82 to increase. This makes it possible to slow down the speed of urine passing through the end portions 81, 82 in the longitudinal direction. As a result, the urine seeps into the top sheet at a slower speed. This prevents urine from leaking from the waist gathers 3 on the front body region 1F side or from leaking from the waist gathers 3 on the back body region 1R side.

[0042] Furthermore, when the diaper 1 as described above is worn by a user, a force acts on the crotch region 1B of the diaper 1 in a direction narrowing it by both legs. As a result, the width of the slit 8 also narrows, and the speed of urine passing through the slit 8 in the longitudinal direction increases. However, in the front body region 1F and the back body region 1R, the force acting in such a direction narrowing the width of the slit 8 is suppressed by the tensile force of the rubber thread 22 outward in the width direction. Thus, the width of the slit 8 is maintained. Therefore, even if the speed of urine increases in the longitudinal center of the slit 8, the speed of urine passing through the ends 81, 82 of the slit 8 is decelerated. Thus, back leakage is prevented.

[0043] Furthermore, even if the distance from the crotch region 1B of the diaper 1 to the ends 81, 82 is sufficiently large and the change in width of the slit 8 in the crotch region 1B is prevented from reaching the ends 81, 82, the above-mentioned structure of the diaper 1 can reliably slow down the speed of urine passing through the ends 81, 82. This prevents urine from leaking from the waist gathers 3 on the front body region 1F side or urine from leaking back from the waist gathers 3 on the back body region 1R side.

[0044] Furthermore, according to the diaper 1 described above, as shown in Fig. 3(B), the ends 81, 82 are tapered so that the depth gradually becomes shallower toward the longitudinal tip. This allows urine to be guided in the direction of the top sheet. Furthermore, the taper angle is a gentle angle of about 45 degrees, so that the tapering prevents the urine from increasing in speed. This prevents urine from splashing up in the thickness direction of the diaper 1, which would otherwise occur if the flow direction of urine could not be controlled, and as a result, side leakage.

[0045] In addition, because the ends 81, 82 are tapered, the absorbent body 6 on the non-skin facing side of the tapered surface is in a state of being thick. This prevents the vicinity of the ends 81, 82 from being crushed in the width direction. This prevents an increase in the speed of urine passing through the ends 81, 82 in the longitudinal direction. This prevents urine from leaking from the waist gathers 3 on the front body region 1F side or from leaking from the waist gathers 3 on the back body region 1R side.

[0046] 3(B), in order to form slits 8 with tapered ends 81, 82, tapered portions are provided at both longitudinal ends of protrusions 51 such that the width gradually decreases. Such tapered protrusions 51 make it easy to pull out mesh plate 50 from absorbent body 6 in which defibrated pulp has been accumulated. Thus, absorbent body 6 having slits 8 can be easily manufactured.

[0047] Furthermore, in the diaper 1 as described above, the opening of the slit 8 is not attached to the back sheet 5. Therefore, urine flowing through the slit 8 can flow out to the back sheet 5. This prevents a large amount of urine from reaching the end 81 or the end 82 of the slit 8. This prevents urine from leaking from the waist gathers 3 on the front body region 1F side or from leaking from the waist gathers 3 on the back body region 1R side.

[0048] In addition, according to the above-described diaper 1, a part of the elastic thread 22 forming the tummy gathers 2 is welded to the absorbent body 6. Therefore, the absorbent body 6 is pulled outward in the width direction. This allows the ends 81, 82 of the slit 8 to be widened in the width direction. This allows the speed of urine passing through the ends 81, 82 to be slowed down. Thus, the urine seeps into the top sheet at a slower speed. This prevents urine from leaking from the waist gathers 3 on the front body region 1F side or from leaking from the waist gathers 3 on the back body region 1R side.

[0049] In the diaper 1 as described above, the slit 8 is disposed, for example, about 130 mm away from the lower end of the waist gather 3 in the rear body region 1R. The basis weight of the absorbent body 6 in the region 83 is about 180 g / m 2 and the contractile force of the waist gathers 3 is about 2.4 N. Therefore, the end 81 of the slit 8 is prevented from contracting in the width direction due to the contractile force of the waist gathers 3. Therefore, an increase in the speed of urine passing through the end 81 is prevented. Therefore, urine is prevented from seeping out into the top sheet with force. Therefore, urine is prevented from leaking from the waist gathers 3 on the side of the back body region 1R. The longitudinal length of the region 83 and the basis weight of the absorbent 6 in the region 83 may be changed to such an extent that the end 81 of the slit 8 is not contracted in the width direction in response to the contractile force of the waist gathers 3.

[0050] Furthermore, according to the diaper 1 described above, back leakage can be easily prevented without providing gathers for preventing back leakage, and therefore the functionality of the diaper 1 can be improved without adding any new members.

[0051] [Variation 1] FIG. 4 is an example of a development view of the diaper 1VA according to the first modified example when viewed from the non-skin-facing side. As shown in FIG. 4, the diaper 1VA includes a single absorbent body 6A that is not divided. The absorbent body 6A is provided with recesses 8A (an example of the "groove" of the present disclosure) that are recessed from the skin-facing side to the non-skin-facing side. The recesses 8A are provided, for example, in two rows in the longitudinal direction. The width of the central portion of the recesses 8A in the longitudinal direction is uniform. Thus, urine passes through the recesses 8A and spreads uniformly in the absorbent body 6A. The recesses 8A may be formed, for example, by hollowing out the absorbent body 6A or by compressing it.

[0052] Here, the end 81A expanding in the width direction may be a region closer to the rear body region 1R than the end of the crotch side in the longitudinal direction of the tummy gathers 2. Alternatively, when the cover sheet 4 of the diaper 1 is formed from three separate pieces, the front body region 1F, the crotch region 1B, and the rear body region 1R, the end 81A may be a portion that overlaps the rear body region 1R when the diaper 1 is viewed in plan from the non-skin-facing side. Alternatively, the end 81A may be a region that communicates with the end of the recess 8A on the rear body region 1R side in the longitudinal direction and has approximately the same width as the end.

[0053] Moreover, such an absorbent body 6A is disposed so as to overlap the lower end of the waist gather 3. Moreover, unlike the end 81 of the slit 8 in the embodiment, the end 81A of the recess 8A on the rear body region 1R side extends to the vicinity of the longitudinal end of the waist gather 3. Moreover, the end 81A is wider than the width of the longitudinal center of the recess 8A.

[0054] [Actions and Effects] According to the above-described diaper 1VA, the outer side surface in the width direction of the end portion 81A is pulled outward in the width direction by the tummy gathers 2. Furthermore, the width of the end portion 81A is wider than the width of the longitudinal center portion of the recessed portion 8A. Therefore, even if the end portion 81A arranged near the waist gathers 3 is contracted in the width direction due to the influence of the contraction force of the waist gathers 3, the width of the end portion 81A is prevented from narrowing below the width of the central portion of the recessed portion 8A. This makes it possible to slow down the speed of urine passing through the end portion 81A. Therefore, the urine seeps into the top sheet in a decelerated state. This prevents urine from leaking from the waist gathers 3 on the rear body region 1R side.

[0055] [Variation 2] FIG. 5 is an example of a development view of a diaper 1VB according to a second modified example when viewed from the non-skin-facing side. The absorbent body 6B of the diaper 1VB is provided with recesses 8B (an example of a "groove" in the present disclosure) that are recessed when viewed from the skin-facing side. The recesses 8B extend in the longitudinal direction and are arranged at a predetermined interval in the width direction. The diaper 1VB is provided with a stretch sheet 23 (an example of the "stretchable member" of the present disclosure) in an area sandwiched between the ends 81B of the recessed portion 8B in the width direction.

[0056] Rubber threads 24 stretched in the width direction of the diaper 1VB are attached to the stretch sheet 23. The stretch sheet 23 is laminated between the absorbent body 6B and the top sheet in the thickness direction with the rubber threads 24 stretched in this manner. The stretch sheet 23 is fixed to the absorbent body 6B by welding or the like. The diaper 1VB does not have a tummy gather 2.

[0057] [Actions and Effects] According to the above-described diaper 1VB, even if the tummy gathers 2 are not provided, the elastic sheet 23 contracts in the width direction, so that the inner side surfaces in the width direction of the two ends 81B (one example of the "side portions in the width direction of the ends" in the present disclosure) are pulled further inward. Thus, the width of the ends 81B becomes wider than the width of the longitudinal center of the recess 8B. Furthermore, even if the end 81B is affected by the contractile force of the waist gathers 3, the width of the end 81B is prevented from narrowing. Thus, the speed of urine passing through the end 81B can be slowed down. Therefore, the urine seeps into the top sheet in a decelerated state. Thus, urine is prevented from leaking from the waist gathers 3 on the rear body region 1R side.

[0058] [Variation 3] FIG. 6 is an example of a development of a diaper according to the third modification. Specifically, it is an example of a development of a diaper 1VC according to the third modification, as viewed from the skin-facing side. The absorbent 6C of the diaper 1VC is provided with a recess 8C (an example of a "groove" in the present disclosure) that is recessed when viewed from the skin-facing side. The recess 8C extends in the longitudinal direction (extension direction) and is arranged at a predetermined interval in the width direction (an example of a "pair of grooves" in the present disclosure). The width of the central portion in the longitudinal direction of the recess 8C is uniform. Therefore, urine passes through the recess 8C and spreads uniformly in the absorbent 6C. The recess 8C may be formed, for example, by hollowing out the absorbent 6C or by compressing it. Note that this figure relates to the rear body region (back side) 1R of the diaper 1VC, but the shape of the front body region 1F (abdominal side) may also be similar to that of this figure.

[0059] Side sheets 10L, 10R are provided on the skin-facing side of the diaper on the left and right in the width direction. The longitudinal ends of the side sheets 10L, 10R are adhered to the absorbent body 6C( with hot melt or the like. Furthermore, one end of the side sheets 10L, 10R, which is on the outer left and right sides in the width direction, is adhered with hot melt or the like to the back sheet and cover sheet 4 constituting the non-skin-facing side of the diaper 1VC to form an adhesive surface.

[0060] On the other hand, the side sheets 10L, 10R are not fixed at the end (other end) on the inner side in the width direction at the longitudinal center of the side sheets 10L, 10R, but are free ends. Elastic members such as rubber threads are attached to the free ends of the side sheets 10L, 10R in the width direction, and are biased toward the longitudinal center. When a wearer puts on the diaper, the free ends of the side sheets 10L, 10R rise in folds from rising lines formed at the boundaries between the inner ends of the width direction adhesive surfaces on the left and right sides in the width direction due to the biasing force of the elastic members. The side sheets 10L, 10R that rise to the skin side are in close contact with the skin side, and function as three-dimensional gathers 3BL, 3BR.

[0061] In this modified example, the longitudinal end 81C of the recess 8C in the back portion 1R of the diaper is wider than the longitudinal center of the recess 8A, and spreads outward in a generally fan-like shape in the width direction. In other words, the arcuate portion of the end 81C spreading out in a generally fan-like shape spreads from the direction toward the extension of the main portion of the recess 8C, which is also the direction toward which the waist gathers 3 are present, toward the direction toward which the side sheets 10L, 10R are present. 3BL, 3BR. Also, on the left and right of longitudinal tip portion 81C, there are tummy gathers 2. Therefore, it can be said that a part of longitudinal tip portion 81C of recess 8C faces in a direction intersecting with the rising line of three-dimensional gathers 3BL, 3BR.

[0062] Fig. 7 is a first example of a widthwise cross-sectional view of a diaper. Specifically, it is a widthwise cross-sectional view of the diaper 1VC shown in Fig. 6 taken along line AA. The diaper 1VC is laminated in the following order from the skin-facing side of the diaper 1VC: top sheet 7, absorbent 6C, back sheet 5, and cover sheet 4. Hydrophobic side sheets 10L, 10R are bonded from the cover sheet 4 to the sides of the absorbent 6C wrapped in the top sheet 7, and to the skin-facing widthwise ends of the absorbent 6C wrapped in the top sheet 7. Since line AA is the cross-section of the diaper 1VC near the crotch portion 1B, the widthwise inner sides of the side sheets 10L, 10R are free ends, and are biased by elastic members to form three-dimensional gathers 3BL, 3BR. In the example shown in this figure, the recess 8C in the absorbent body 6C is a roughly V-shaped groove consisting of a bottom surface where the absorbent body is thinnest, a sloping line that rises toward the center in the width direction, and sloping lines that rise toward the left and right ends in the width direction, and body fluids that fall into the recess 8C flow in the longitudinal direction while being evenly absorbed by the absorbent body 6C to the inside and outside in the width direction.

[0063] Fig. 8 is a second example of a widthwise cross-sectional view of a diaper. The cutting position is line AA shown in Fig. 6, as in Fig. 7. In this example, the inclined lines rising toward the widthwise center of the grooves 8C rise almost vertically. On the other hand, the inclination angles of the inclined lines rising toward the left and right ends of the grooves 8C in the widthwise direction are smaller than the inclined lines rising toward the widthwise center. For this reason, urine that falls into the recesses 8C and overflows tends to flow outward in the widthwise direction.

[0064] [Actions and Effects] In the diaper 1VC as described above, the longitudinal end 81C of the recess 8C in the back portion 1R of the diaper spreads outward in the width direction. Tummy gathers 2 are attached to the sides of the longitudinal end 81C. When the diaper 1VC is worn, the absorbent 6C in the front body region 1F and the back body region 1R spreads due to the contractile force of the tummy gathers 2. This prevents the width of the end 81C from becoming narrower than the width of the central portion of the recess 8C. In this example, urine that is not absorbed in the groove 8C flows outward in the width direction of the diaper while being decelerated by the end 81C.

[0065] Here, the three-dimensional gathers 3BL, 3BR are present on the widthwise outer side of the absorbent 6C. In addition, a bag-like space capable of temporarily holding urine is present between the three-dimensional gathers 3BL, 3BR and the absorbent 6C, so that urine flowing from the longitudinal end 81C toward the three-dimensional gathers 3BL, 3BR is absorbed by the absorbent 6C while being held in the bag-like space. In this form, the main flow direction of urine that flows through the recess 8C and slows down when it reaches the end 81C is the widthwise outer side, making it difficult for it to reach the waist gathers, thereby suppressing back leakage. In addition, urine is held and absorbed in the bag-like space formed between the three-dimensional gathers 3BL, 3BR and the absorbent 6C, so it does not overflow outside the diaper 1VC.

[0066] Also, if the inclination line on the side of the three-dimensional gathers 3BL, 3BR is made gentler as shown in Fig. 8, even if the groove portion 8C narrows, a certain amount of urine will flow into the bag-like space formed between the three-dimensional gathers 3BL, 3BR and the absorbent body 6C. Therefore, even if the groove portion 8C temporarily does not function as a urine flow path, the urine will not overflow outside the diaper 1VC.

[0067] [Variation 4] Fig. 9 is an example of a development view of a diaper according to the fourth modified example. Specifically, it is an example of a development view of a diaper 1VD according to the fourth modified example, as viewed from the skin-facing side. The absorbent body 6D of the diaper 1VD is provided with recesses 8D (an example of a "groove" in the present disclosure) that are recessed when viewed from the skin-facing side. In the crotch portion 1B, the recesses 8D extend in the longitudinal direction (extension direction) and are arranged at predetermined intervals in the width direction. (An example of the "pair of grooves" of the present disclosure.) However, the recess 8D is bent outward in the width direction in the rear body region 1R shown in the figure. The recess 8C may be formed, for example, by hollowing out the absorbent body 6C or by compressing it.

[0068] The diaper 1VD is provided with three-dimensional gathers 3BR, 3BL, as in the third modification. The urine that passes through the main part of the recess 8D and reaches the front body region 1F and the back body region 1R changes its flow direction due to the longitudinal tip 81D of the recess 8D being bent outward in the width direction, and is discharged from the longitudinal tip 81D facing outward in the width direction. The longitudinal tip 81D faces the direction in which the standing lines of the three-dimensional gathers 3BL, 3BR are present. That is, in this modification, as in the third modification, the longitudinal tip 81D, which is a part of the recess 8D, faces the direction intersecting with the standing lines of the three-dimensional gathers 3BL, 3BR. Note that this figure relates to the back body region 1R (back side) of the diaper 1VD, but the shape in the front body region 1F (abdominal side) may also be the same as that shown in this figure.

[0069] [Actions and Effects] According to the above-described diaper 1VD, urine that has flowed through the recess 8D flows outward in the width direction when it reaches the front body region 1F and the back body region 1R according to the change in direction of the recess 8D. Then, urine discharged from the longitudinal end portion 81D is led directly to the bag-like space formed between the three-dimensional gathers 3BL, 3BR and the absorbent body 6C, and is absorbed by the absorbent body 6C while being held therein. In this configuration, the flow direction of urine is toward the outside in the width direction of the diaper 1VD, so back leakage is suppressed. Furthermore, urine is held and absorbed in the bag-like space formed between the three-dimensional gathers 3BL, 3BR and the absorbent body 6C, so it does not overflow outside the diaper 1VD.

[0070] [Other variations] Instead of the slits 8, a recess recessed from the skin-facing side to the non-skin-facing side may extend in the longitudinal direction of the absorbent body 6, and the depth of the end portion 81 or the end portion 82 may be made deeper than the depth of the longitudinal center portion of the slits 8. With such a diaper, the speed of urine passing through the end portion 81 or the end portion 82 can be further reduced. This reliably prevents urine from leaking from the waist gathers 3 on the front body region 1F side or urine from leaking back from the waist gathers 3 on the back body region 1R side.

[0071] In addition, the tummy gathers 2 may not be arranged in the width direction of either the end 81 or the end 82. In addition, the end 81 or the end 82 may not be tapered. In addition, a structure that substitutes for a taper (for example, a stepped structure in the longitudinal direction) may be provided. In addition, the ends 81 of the two slits 8 may not be arranged at substantially the same position in the longitudinal direction. In addition, the width and depth of the central portion in the longitudinal direction of the slit 8 may not be uniform. In addition, a part of the rubber thread 22 forming the tummy gathers 2 may be welded to a sheet-like member (for example, the back sheet 5) to which the absorbent body 6 is attached. In such a case, the rubber thread forming the tummy gathers 2 and the absorbent body 6 are indirectly bonded to each other. In addition, the rubber thread forming the tummy gathers 2 may not be welded to the absorbent body 6. In addition, the diaper 1 may be a tape-type diaper in which the rear body region 1R is fixed to the front body region 1F via a tape.

[0072] The embodiments and modifications disclosed above can be combined with each other. [Explanation of symbols]

[0073] 1, 1VA, 1VB, 1VC, 1VD: Diapers 1B: Inseam area 1F: Front body area 1R: Back body area 2: Tammy Gather 3: Gathered waist 3BL, 3BR: 3D gathers 4: Cover sheet 5: Back seat 6, 6A, 6B, 6C, 6D: absorbent 8: Slit 8A, 8B, 8C, 8D: Recesses 22: Elastic thread 23: Stretch sheet 24: Elastic thread 50: Mesh plate 51: Convex 81, 81A, 81B, 81C, 81D: End 82: End 83 :Area

Claims

1. An absorbent article that covers an abdomen, a crotch area, and a back of a wearer when worn by the wearer, an absorbent body having a pair of longitudinally extending grooves; three-dimensional gathers arranged on the left and right sides in the width direction of the absorbent body, one end on the outer side in the width direction is bonded to the absorbent body to form an adhesive surface, the other end of which is a free end at the tip of an upright line which is a line formed at the inner end of the adhesive surface in the width direction, and the free end is biased by an elastic member so as to be in close contact with the skin surface of a wearer; With At least a part of the end portions on the rear side of the pair of grooves is oriented in a direction intersecting with the standing line of the three-dimensional gathers, An elastic member that contracts in the width direction is disposed between the ends of the pair of grooves. Absorbent articles.

2. At least a part of the end portions of the pair of grooves on the abdominal side is oriented in a direction intersecting with the standing line of the three-dimensional gathers. The absorbent article of claim 1.

3. The ends of the pair of grooves are generally fan-shaped, The substantially fan-shaped arc portion of the end portion is formed in a direction intersecting the standing line of the three-dimensional gather from the extending direction of the pair of grooves. The absorbent article according to claim 1 or 2.

4. The pair of grooves are bent so that the ends in the longitudinal direction face outward in the width direction, The extending direction of the ends of the pair of grooves is a direction intersecting with the standing line of the three-dimensional gathers. An absorbent article according to any one of claims 1 to 3.

5. The width of the end portion is wider than the width of the pair of grooves at a position corresponding to the crotch portion. The absorbent article of claim 3.

6. The depth of the end portion is gradually increased from a position corresponding to the crotch portion toward a position corresponding to the back portion. It gradually becomes shallower. The absorbent article according to any one of claims 3 to 5.

7. The pair of grooves each include a bottom surface of the groove, an inclined line rising toward a center in the width direction, and an inclined line rising toward left and right ends in the width direction, The inclined lines rising toward the left and right ends in the width direction have a smaller inclination than the inclined lines rising toward the center in the width direction. An absorbent article according to any one of claims 1 to 6.

8. A first elastic member extends in the width direction of at least one of the ends in the longitudinal direction of the pair of grooves, is provided in a stretched state in the width direction, and is capable of expanding and contracting the side of the width direction of the end in a direction in which the width of the end increases by contraction. An absorbent article according to any one of claims 1 to 7.

9. The absorbent article further includes a second stretchable member that is provided at a predetermined interval from the back end of the absorbent body in a longitudinal tip direction when the absorbent article is worn by the wearer, and is stretchable in a width direction; The distance between the pair of grooves is a distance that prevents the end portion from contracting by a predetermined length or more in the width direction due to contraction of the second elastic member. The absorbent article of claim 8.

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