JP5836782B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as urine pads (including incontinence pads), disposable diapers, and sanitary napkins.

  Conventionally, in order to improve the diffusibility of urine or the like in an absorbent article, an absorbent article having grooves formed in an absorbent core is known. For example, Patent Document 1 has a top sheet, a back sheet, and an absorbent core provided between them, the absorbent core has an upper absorbent layer and a lower absorbent layer, and the upper absorbent layer has a longitudinal direction ( An absorbent article in which an opening extending in the longitudinal direction of the wearer when wearing the absorbent article is formed is disclosed. In the absorbent article disclosed in Patent Literature 1, a groove extending in the front-rear direction is formed on the surface of the absorbent core on the top sheet side. Patent Document 2 discloses an absorbent article having a top sheet, a back sheet, and an absorbent core provided therebetween, and an opening extending in the front-rear direction is formed in the absorbent core.

JP 2007-202575 A Japanese Utility Model Publication No. 02-084623

  The absorbent article disclosed in Patent Document 1 is excellent in diffusibility of urine and the like on the surface of the absorbent core on the top sheet side, whereas the diffusibility of urine and the like is inferior on the back sheet side surface of the absorbent core. In order to enhance the diffusibility of urine etc. also on the backsheet side surface of the absorbent core, as in the absorbent article disclosed in Patent Document 2, when providing an opening through the absorbent core in the absorbent core, Urine or the like excreted from the wearer moves to the back sheet side surface of the absorbent core at a time, and leakage of urine or the like is likely to occur.

  This invention is made | formed in view of the said situation, The objective is to provide the absorbent article which is excellent in the diffusibility of urine etc. and has a high leak prevention effect.

  The absorbent article of the present invention capable of solving the above problems is an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent core provided therebetween. The absorbent core has a front-rear direction and a width direction, and the absorbent core has a first groove formed on the topsheet-side surface and extending in the front-rear direction, and is formed on the backsheet-side surface. A second groove and a third groove extending in front of each other, the front end of the second groove being located in front of the front end of the first groove, and the rear end of the second groove being the first groove The front end of the third groove is located behind the center in the front-rear direction of the groove, the rear end of the third groove is located behind the center in the front-rear direction of the first groove, and the rear end of the third groove is the front end of the first groove. It is characterized by being located behind the rear end.

  In the absorbent article of the present invention, the first groove, the second groove, and the third groove are alternately provided in the front-rear direction on the topsheet side surface and the backsheet side surface of the absorbent core. The urine or the like excreted from the absorbent core on the top sheet side surface diffuses in the first groove in the front-rear direction, and further easily shifts to the second groove and the third groove. Therefore, the diffusibility of urine and the like in the front-rear direction is improved on both the top sheet side surface and the back sheet side surface of the absorbent core. On the other hand, since urine etc. excreted on the top sheet side surface of the absorbent core does not easily transfer to the back sheet side surface in a large amount at a time, leakage of urine etc. can be effectively prevented. Further, the absorbent article of the present invention makes it easy to bend the absorbent core in the width direction with the first groove, the second groove, and the third groove, and the absorbent core has a depression between the wearer's crotch. It can form and can receive excrement from a wearer suitably.

  The rear end of the second groove is located in front of the front end of the first groove and / or the front end of the third groove is located in rear of the rear end of the first groove. It is preferable to do. If each groove is provided in this way, it becomes difficult for urine and the like to move from the top sheet side surface to the back sheet side surface in a large amount at once, and the effect of preventing leakage of urine and the like is enhanced. In addition, for example, when the absorbent article is mounted, the absorbent article is pulled in the front-rear direction, so that a recess is easily formed in the absorbent core.

  The first groove, the second groove, and the third groove are preferably provided on the same imaginary line extending in the front-rear direction of the absorbent core. If the first groove, the second groove, and the third groove are provided in this way, urine or the like diffused in the front-rear direction in the first groove is easily transferred to the second groove and the third groove, The diffusibility in the absorbent core such as urine is improved. Furthermore, it is preferable that the imaginary line is a center line in the width direction of the absorbent core. In this case, an absorptive core forms a hollow between a wearer's crotch, and becomes easy to receive excrement, such as urine suitably.

  Preferably, the second groove extends to the front end of the absorbent core and / or the third groove extends to the rear end of the absorbent core. If the second groove and the third groove are formed in this way, the absorbent core can be easily folded in the width direction at the front end and / or the rear end of the absorbent core, and the absorbent article can be folded in the front-rear direction. By pulling, it becomes easy to form a depression naturally in the absorbent core.

  The width of the second groove may increase toward the front and / or the width of the third groove may increase toward the rear. Thus, if the 2nd groove | channel and the 3rd groove | channel are formed, it will become easy to hold the edge part of the front-back direction of an absorbent article, and to bend an absorbent core in the width direction.

  The absorbent core has an upper absorbent layer provided on the top sheet side surface and a lower absorbent layer provided on the back sheet side surface, and the upper absorbent layer extends in the front-rear direction as a first groove. It is preferable that the lower absorbent layer has an opening and has a second opening extending in the front-rear direction as a second groove and a third opening extending in the front-rear direction as a third groove. If the absorbent core is composed of an upper absorbent layer and a lower absorbent layer, and each groove is formed by an opening provided in the upper absorbent layer or the lower absorbent layer, it is easy to form the groove in the absorbent core. become.

  Between the upper absorbent layer and the lower absorbent layer, an intermediate sheet having a color different from that of the upper absorbent layer and the lower absorbent layer may be provided. If such an intermediate sheet is provided between the upper absorbent layer and the lower absorbent layer, when the absorbent article is viewed from the top sheet side or the back sheet side, the first groove, the second groove or It becomes easier to recognize the position of the third groove. Therefore, for example, when the absorbent article is mounted, it is easy to bend the absorbent core in the width direction while recognizing the position of the groove.

  The back sheet may have a color different from that of the absorbent core. If the back sheet has a color different from that of the absorbent core, the position of the first groove, the second groove, or the third groove can be easily recognized when the absorbent article is viewed from the top sheet side. . Therefore, for example, when the absorbent article is mounted, it is easy to bend the absorbent core in the width direction while recognizing the position of the groove, and it is easy to install the absorbent core at a suitable position between the wearer's crotch become.

  In the absorbent article of the present invention, the first groove, the second groove, and the third groove are alternately provided on the top sheet side surface and the back sheet side surface of the absorbent core, so that the top of the absorbent core. The diffusibility of urine and the like in the front-rear direction is improved on both the sheet-side surface and the backsheet-side surface. Moreover, it becomes difficult for urine etc. excreted from the wearer to the top sheet side surface of the absorbent core to move to the back sheet side surface at a time, and leakage of urine etc. can be effectively prevented. Furthermore, the absorbent article of the present invention forms a recess between the wearer's crotch by bending the absorbent core in the width direction at the first groove, the second groove, and the third groove. The excrement from a wearer can be received suitably.

The example of the top view which looked at the absorptive core from the top sheet side is represented. II-II sectional drawing of the absorptive core shown in FIG. 1 is represented. The other example of an absorptive core is represented. The other example of an absorptive core is represented. The other example of the top view which looked at the absorptive core from the top sheet side is represented. Fig. 6 shows a VI-VI cross-sectional view of the absorbent core shown in Fig. 5. The top view which looked at the absorbent article (urine pad) from the top sheet side as one embodiment of the absorbent article of this invention is represented. VIII-VIII sectional drawing of the absorbent article shown in FIG. 7 is represented.

  The absorbent article of the present invention has a top sheet, a back sheet, and an absorbent core provided therebetween. Examples of the absorbent article of the present invention include urine pads (including incontinence pads), disposable diapers, sanitary napkins and the like.

  The shape of the absorbent article is not particularly limited. When the absorbent article is, for example, a urine pad or a sanitary napkin, the shape of the absorbent article includes a substantially rectangular shape, an hourglass shape, a gourd shape, a battledore shape, and the like.

  When the absorbent article is a disposable diaper, the disposable diaper may be an open-type disposable diaper that is provided with a pair of fastening members on the left and right sides and formed into a pants shape when worn by the fastening member, and a waist opening And a pair of legged disposable diapers in which a pair of leg openings are formed.

  A top sheet is a sheet | seat located in the wearer side in the case of wear of an absorbent article, and the material will not be specifically limited if it is liquid-permeable. The back sheet is a sheet located on the side opposite to the wearer when the absorbent article is worn, that is, the outside, and the material is not particularly limited as long as it is liquid-impermeable. In the present invention, liquid impermeability includes the meaning of water repellency.

  Examples of the top sheet include nonwoven fabrics formed from hydrophilic fibers such as cellulose, rayon, and cotton; and hydrophobic properties such as polyolefin (for example, polypropylene and polyethylene), polyester (for example, PET), and polyamide (for example, nylon). A non-woven fabric formed from fibers, in which the surface of hydrophobic fibers is hydrophilized with a surfactant, can be used. As the top sheet, a woven fabric, a knitted fabric, or a plastic film in which holes are formed may be used.

  As the back sheet, a non-woven fabric formed from hydrophobic fibers such as polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET), polyamide (for example, nylon), a plastic film, or the like can be used. Moreover, you may use the laminated body of a nonwoven fabric and a plastic film.

  When a nonwoven fabric is used as the top sheet or the back sheet, the nonwoven fabric is preferably manufactured by a spunbond method, an air-through method, a point bond method, a melt blow method, an airlaid method, or a combination of these production methods. Moreover, you may use the nonwoven fabric manufactured by SMS method which combined the spun bond method and the melt blow method.

  The absorbent core is provided between the top sheet and the back sheet and absorbs excrement such as urine. The absorbent core has a front-rear direction and a width direction, and also has a surface located on the topsheet side and a surface located on the backsheet side.

  In the present invention, the front-rear direction means a direction extending in the front-rear direction of the wearer's crotch when the wearer wears the absorbent article. In the front-rear direction, a position applied to the wearer's ventral side is referred to as a front side, and a position applied to the wearer's back side is referred to as a rear side. The width direction means a direction that is on the same plane as the absorbent core and is orthogonal to the front-rear direction. Moreover, an upper side means the wearer side at the time of wearing an absorbent article, and is used synonymously with the top sheet side. The lower side means the side opposite to the wearer when the absorbent article is worn, that is, the outer side, and is used synonymously with the back sheet side. A direction extending from the upper side to the lower side is referred to as a vertical direction.

  The absorbent core is not particularly limited as long as it includes an absorbent material that can absorb excrement such as urine. As the absorbent core, for example, a molded body obtained by molding the absorbent material into a predetermined shape is used, or the absorbent material is covered with a sheet member such as a paper sheet (for example, tissue paper or thin paper) or a liquid-permeable nonwoven sheet. Can be used. Examples of the absorbent material include hydrophilic fibers such as pulverized pulp fiber and cellulose fiber, and water-absorbing resins such as polyacrylic acid, polyaspartic acid, cellulose, and starch / acrylonitrile. The water-absorbing material may include polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, and heat-fusible fibers such as polyamide fibers. These heat-fusible fibers may be hydrophilized with a surfactant or the like in order to increase the affinity with urine or the like.

  The absorbent material preferably contains hydrophilic fibers and more preferably contains pulp fibers from the viewpoint of increasing the absorption rate of urine and the like and improving the shape retention of the absorbent core. Moreover, it is preferable that an absorptive material contains a water absorbing resin from the point which raises absorption capacity. More preferably, an absorptive core contains a hydrophilic fiber and a water absorbing resin as an absorptive material. Further, as will be described later, since the absorbent core has grooves formed on the topsheet side surface and the backsheet side surface, if the absorbent core contains hydrophilic fibers and a water absorbent resin, the absorbent core The groove of the core is easily maintained in a predetermined shape, and the absorption performance of the absorbent core is enhanced.

  The shape (planar shape) of the absorbent core is not particularly limited. The shape of the absorbent core may be appropriately determined according to the application, and examples thereof include a rectangular shape, an hourglass shape, a gourd shape, and a battledore shape.

  The absorbent core may be formed by laminating a plurality of layers. For example, the absorbent core may have an upper absorbent layer provided on the top sheet side and a lower absorbent layer provided on the back sheet side. The upper absorbent layer and the lower absorbent layer are not particularly limited as long as they contain an absorbent material, and the shape (planar shape) thereof is not particularly limited as well, as described above for the absorbent core.

  The absorbent core has a first groove formed on the surface of the top sheet and extending in the front-rear direction, and has a second groove and a third groove formed on the surface of the back sheet and extending in the front-rear direction. The second groove is provided such that the front end is located in front of the front end of the first groove and the rear end is located in front of the front-rear direction center of the first groove. The third groove is provided such that the front end is located behind the front-rear direction center of the first groove and the rear end is located behind the rear end of the first groove.

  Here, the 1st-3rd groove | channel formed in an absorptive core is demonstrated, referring drawings. FIG. 1: represents the top view which looked at the absorptive core from the top sheet side. FIG. 2 shows a cross-sectional view of the absorbent core shown in FIG. 1 taken along the line II-II. In the drawings of the present invention, the arrow x represents the width direction, the arrow y represents the front-rear direction, and the direction perpendicular to the plane formed by the arrows x, y represents the up-down direction z. Moreover, in FIG. 1, the upper side of the figure corresponds to the front side of the absorbent article, and the lower side of the figure corresponds to the rear side of the absorbent article. The present invention is not limited to the embodiments shown in the drawings.

  The absorbent core 4 has a topsheet side surface 5 and a backsheet side surface 6. The absorbent core 4 has a first groove 7 formed on the top sheet side surface 5 and extending in the front-rear direction y, and a second groove 8 formed on the back sheet side surface 6 and extending in the front-rear direction y. It has a third groove 9 extending in the direction y. In the absorbent core 4 shown in FIGS. 1 and 2, the second groove 8 is provided in front of the first groove 7, and the third groove 9 is provided in the rear of the first groove 7. . That is, the second groove 8 is such that the front end 8F is positioned in front of the front end 7F of the first groove 7 and the rear end 8R is also positioned in front of the front end 7F of the first groove 7. The third groove 9 is provided such that the rear end 9R is located behind the rear end 7R of the first groove 7 and the front end 9F is also located behind the rear end 7R of the first groove 7. It is provided to do. In the present invention, the “groove” means a depression formed on the surface of the absorbent core and has a bottom surface. Therefore, the groove does not penetrate the absorbent core in the vertical direction. On the other hand, the “opening” is provided through the absorbent core in the vertical direction.

  The absorbent article of the present invention is provided with the first groove 7, the second groove 8, and the third groove 9 in the absorbent core 4 as described above, whereby the urine and the like in the absorbent core 4 in the front-rear direction y. Improves diffusivity. That is, urine or the like excreted from the wearer diffuses in the front-rear direction y in the first groove 7 on the topsheet side surface 5 of the absorbent core 4. Part of the urine or the like received on the topsheet side surface 5 of the absorbent core 4 penetrates the absorbent core 4 in the vertical direction z and moves to the backsheet side surface 6 of the absorbent core 4 in this way. Urine or the like that has migrated to the backsheet-side surface 6 diffuses in the front-rear direction y in the second groove 8 and the third groove 9. And the 1st groove | channel 7, the 2nd groove | channel 8, and the 3rd groove | channel 9 are provided in the top sheet side surface 5 and the back sheet | seat side surface 6 of the absorptive core 4 by turns, The front-back direction, such as urine While ensuring diffusibility to y, urine excreted from the wearer on the topsheet side surface 5 of the absorbent core 4 is difficult to transfer to the backsheet side surface 6 in large quantities at once, and leakage of urine etc. It can be effectively prevented.

  Moreover, the absorbent article of this invention bends the absorbent core 4 in the width direction x by the 1st groove | channel 7, the 2nd groove | channel 8, and the 3rd groove | channel 9, and the absorbent core 4 is between a wearer's crotch. It becomes easy to form a depression. Therefore, the absorbent article of the present invention can suitably receive excrement from the wearer and is less likely to cause side leakage. In particular, by providing the second groove 8 and the third groove 9 on the backsheet-side surface 6, the absorbent core 4 can be easily bent in the width direction x, and in close contact with the skin at the wearer's abdomen or buttocks. The front-sheet-side surface 5 is formed flat at the front and rear end portions of the absorbent core 4 that is easy to be worn, and the wearing feeling of the absorbent article is improved.

  It is preferable that the 1st groove | channel 7 is provided in the absorptive core 4 so that a wearer's urination part vicinity may be faced. Since the first groove 7 is formed on the topsheet side surface 5 of the absorbent core 4, if the first groove 7 is provided in the absorbent core 4 so as to face the vicinity of the urination part of the wearer, First, urine excreted from the wearer easily diffuses in the front-rear direction y through the first groove 7, and the diffusibility of the absorbent core 4 such as urine is enhanced. Therefore, the first groove 7 has a front end 7F of the first groove 7 when the front end 4F is 0% and the rear end 4R is 100% relative to the longitudinal direction y of the absorbent core 4. It is located in the range of 10% to 35% (more preferably in the range of 15% to 30%), and the rear end 7R of the first groove 7 is in the range of 65% to 90% (more preferably 70% to 85%). It is preferable that it is located in the range.

  The second groove 8 and the third groove 9 are preferably provided in the vicinity of the ends 4F and 4R in the front-rear direction y of the absorbent core 4. That is, the second groove 8 preferably extends to the front end 4F of the absorbent core 4 or the vicinity thereof, and the third groove 9 extends to the rear end 4R of the absorbent core 4 or the vicinity thereof. It is preferable. Thus, if the 2nd groove | channel 8 and the 3rd groove | channel 9 are formed, it will become easy to bend the absorptive core 4 to the width direction x over the whole front-back direction y. In this case, for example, when the absorbent article is mounted, by pulling the absorbent article in the front-rear direction y, the absorbent core 4 can easily form a depression in the cross section in the width direction x. Therefore, by mounting the absorbent article in this state, the absorbent core 4 can suitably receive excretion from the wearer. Preferably, the second groove 8 has a front end 8F within 30 mm from the front end 4F of the absorbent core 4, more preferably within 20 mm. In addition, the rear end 9R of the third groove 9 is preferably within 30 mm from the rear end 4R of the absorbent core 4 and more preferably within 20 mm. 1 and 2, the second groove 8 extends to the front end 4F of the absorbent core 4, and the third groove 9 extends to the rear end 4R of the absorbent core 4. That is, the front end 8F of the second groove 8 matches the front end 4F of the absorbent core 4, and the rear end 9R of the third groove 9 matches the rear end 4R of the absorbent core 4.

  The width (length in the width direction x) of the first groove 7, the second groove 8, and the third groove 9 is preferably 5 mm or more, more preferably 8 mm or more, and preferably 30 mm or less, more preferably 25 mm or less. preferable. If the width of each groove is 5 mm or more, the diffusibility of urine and the like in each groove in the front-rear direction y is enhanced, and the absorbent core 4 is easily bent in the width direction x. If the width | variety of each groove | channel is 30 mm or less, the quantity of the absorptive material contained in the absorptive core 4 will increase, and absorption capacity will increase.

  The shape of the first groove 7, the second groove 8, and the third groove 9 is not particularly limited as long as it extends in the front-rear direction y, but is preferably longer than the width direction x in the front-rear direction y. In FIG. 1, the first groove 7 has a rectangular shape with a long corner in the front-rear direction y, and the second groove 8 and the third groove 9 have a rectangular shape with a long corner in the front-rear direction y. One end is cut off. Moreover, the shape of each groove | channel may be a rectangle, an ellipse, a polygon, an hourglass type, a gourd type etc., for example.

  The width of the second groove 8 and the third groove 9 is preferably widened outward in the front-rear direction y of the absorbent core 4. That is, the width of the second groove 8 may increase toward the front, and the width of the third groove 9 may increase toward the rear. Thus, if the 2nd groove | channel 8 and the 3rd groove | channel 9 are formed, it will become easy to bend the absorbent core 4 to the width direction x by grasping the edge part of the front-back direction y of an absorbent article.

  Various examples of grooves formed in the absorbent core will be described with reference to FIGS. 3 (a) to 3 (d) and FIGS. 4 (a) and 4 (b). 3 (a) to 3 (d) and FIGS. 4 (a) and 4 (b) are plan views of the absorbent core 4 as viewed from the top sheet side. It has the 1st groove | channel 7 formed in the surface, the 2nd groove | channel 8 and the 3rd groove | channel 9 which were formed in the back seat | sheet side surface.

  In FIG. 3A, two first grooves 7, second grooves 8, and third grooves 9 are provided side by side in the width direction x. As described above, a plurality of the first grooves 7, the second grooves 8, and the third grooves 9 may be provided.

  In FIG. 3B, only one first groove 7 is provided, whereas two second grooves 8 and two third grooves 9 are provided side by side in the width direction x. Conversely, in FIG. 3C, two first grooves 7 are provided side by side in the width direction x, whereas only one second groove 8 and third groove 9 are provided. Yes. In this way, the first groove 7, the second groove 8, and the third groove 9 may be provided in different numbers.

  The first groove 7, the second groove 8, and the third groove 9 are preferably provided side by side in the front-rear direction y of the absorbent core 4 as shown in FIG. 1 and FIG. . That is, the first groove 7, the second groove 8, and the third groove 9 are preferably provided on the same imaginary line extending in the front-rear direction y of the absorbent core 4. If the first groove 7, the second groove 8, and the third groove 9 are provided in this way, urine or the like diffused in the front-rear direction y in the first groove 7 is the second groove 8 and the third groove. 9 and the diffusibility in the absorbent core 4 such as urine is improved.

  Further, as shown in FIG. 1, the first groove 7, the second groove 8, and the third groove 9 are on the center line in the width direction x of the absorbent core 4 (center line extending in the front-rear direction y). It is preferable to be provided. Thus, if the 1st groove | channel 7, the 2nd groove | channel 8, and the 3rd groove | channel 9 are provided, the absorptive core 4 will form a hollow in a wearer's crotch, and will receive excrement, such as urine suitably. In addition to being easy, urine and the like easily diffuse in the front-rear direction y through each groove.

  In FIG. 3D, unlike the absorbent core 4 in FIG. 1, the second groove 8 and the third groove 9 do not extend to the ends 4F and 4R in the front-rear direction y of the absorbent core 4. . The second groove 8 and the third groove 9 may be formed in this way.

  However, the second groove 8 preferably extends to the front end 4F of the absorbent core 4, and the third groove 9 preferably extends to the rear end 4R of the absorbent core 4. . If the second groove 8 and the third groove 9 are thus formed, the absorbent core 4 can be easily bent in the width direction x at the front end 4F and / or the rear end 4R of the absorbent core 4, By pulling the absorbent article in the front-rear direction y, the absorbent core 4 is bent in the width direction x, and a depression is easily formed naturally.

  4A and 4B, the second groove 8 extends rearward from the front end 7F of the first groove 7, and the third groove 9 is the rear end 7R of the first groove 7. Extends forward. Thus, the second groove 8 and the third groove 9 may be provided so as to partially overlap the first groove 7 with respect to the front-rear direction y. However, in this case, the second groove 8 has the rear end 8R positioned in front of the center 7C in the front-rear direction y of the first groove 7, and the third groove 9 has the front end 9F at the first groove. 7 is provided behind the center 7C in the front-rear direction y. That is, the second groove 8 and the third groove 9 are not provided so as to cross each other.

  In addition, in the absorptive core 4 shown to Fig.4 (a), the 1st groove | channel 7, the 2nd groove | channel 8, and the 3rd groove | channel 9 are provided along with the front-back direction y, As a result, 2nd A part of the groove 8 overlaps the first groove 7 to form an opening 10 penetrating the absorbent core 4, and a part of the third groove 9 overlaps the first groove 7 to absorb the absorbent core. 4 is formed. In this case, urine or the like diffused in the first groove 7 in the front-rear direction y easily moves to the second groove 8 or the third groove 9 through the openings 10 and 11, and the urine or the like in the absorbent core 4 Diffusivity is further enhanced. However, from the viewpoint of preventing leakage of urine and the like, it is preferable that the amount of urine and the like migrate to the backsheet side surface 6 of the absorbent core 4 is not excessive. Therefore, when the first groove 7 and the second groove 8 are provided so as to overlap, the length of the portion where the first groove 7 and the second groove 8 overlap (that is, the length of the opening 10 in the front-rear direction y). Is preferably 20 mm or less, more preferably 15 mm or less, and even more preferably 10 mm or less. Particularly preferably, the first groove 7 and the second groove 8 do not overlap each other. The same applies to the relationship between the first groove 7 and the third groove 9.

  On the other hand, as shown in FIG. 4B, when the first groove 7 is provided so as to be shifted in the width direction x from the second groove 8 and the third groove 9, the second groove 8 The side end 8R is located forward of the front end 7F of the first groove 7 or rearward of the front end 7F of the first groove 7 within 30 mm (more preferably within 20 mm, more preferably within 15 mm). Preferably, the third groove 9 has a front end 9F that is rearward of the rear end 7R of the first groove 7 or 30 mm forward of the rear end 7R of the first groove 7. It is preferable to be provided so as to be within (more preferably within 20 mm, and even more preferably within 15 mm). If each groove is provided in this way, the first groove 7 and the second groove 8 overlap each other in the front-rear direction y, or the first groove 7 and the third groove 9 correspond to the front-rear direction y. In the overlapping portion, irregular wrinkles are less likely to occur in the absorbent core 4 and the wearing feeling of the absorbent article is improved.

  The second groove 8 and the third groove 9 are preferably provided so as not to overlap with the first groove 7 in the front-rear direction y, as shown in FIG. 1 and FIGS. . In other words, the second groove 8 is preferably provided such that the rear end 8R is positioned forward of the front end 7F of the first groove 7, and the third groove 9 has the front end 9F as the first end. The groove 7 is preferably provided so as to be located behind the rear end 7R. If each groove is provided in this manner, urine or the like is unlikely to move in large quantities from the top sheet side surface 5 to the back sheet side surface 6 at a time, and the effect of preventing leakage of urine or the like is enhanced. Further, by pulling the absorbent article in the front-rear direction y, it becomes easy to form a recess in the absorbent core 4 suitably. More preferably, the rear end 8R of the second groove 8 is located 5 mm or more and 30 mm or less ahead (more preferably 8 mm or more and 20 mm or less front) of the front end 7F of the first groove 7. The front end 9F of the third groove 9 is preferably located 5 mm to 30 mm rearward (more preferably 8 mm to 20 mm rearward) behind the rear end 7R of the first groove 7.

  The method for forming the first groove, the second groove, and the third groove in the absorbent core is not particularly limited. For example, each groove may be formed by partially compressing the absorbent core, and each groove may be formed by partially reducing the basis weight of the absorbent core. In addition, it is preferable that each groove | channel is formed by reducing the fabric weight of an absorptive core from the point which urine etc. osmose | permeate an absorptive core and make it easy to transfer to a 2nd groove | channel and a 3rd groove | channel. That is, it is preferable that the absorbent core has less weight per unit area in the first groove, the second groove, and the third groove than other portions of the absorbent core.

  In addition, the first groove, the second groove, and the third groove have openings in the layer provided on the top sheet side surface and the layer provided on the back sheet side surface of the absorbent core composed of a plurality of layers, respectively. It may be formed by being provided. That is, the absorbent core has an upper absorbent layer provided on the top sheet side surface and a lower absorbent layer provided on the back sheet side surface, and the upper absorbent layer extends in the front-rear direction as a first groove. The lower absorbent layer may have a second opening extending in the front-rear direction as the second groove and a third opening extending in the front-rear direction as the third groove. Good. This will be described with reference to FIGS.

  FIG. 5: represents the top view which looked at the absorptive core comprised from a some layer from the top sheet side surface. FIG. 6 shows a VI-VI cross-sectional view of the absorbent core shown in FIG. 5 and 6 show examples in the case where the absorbent core shown in FIGS. 1 and 2 is composed of a plurality of layers. In addition, the embodiment in which an absorptive core is composed of a plurality of layers is not limited to the drawings.

  5 and 6, the absorbent core 4 has an upper absorbent layer 12 provided on the top sheet side surface 5 and a lower absorbent layer 13 provided on the back sheet side surface 6. The first groove 14 has a first opening 14 extending in the front-rear direction y, and the lower absorbent layer 13 has a second opening 15 extending in the front-rear direction y as the second groove 8, and the third groove As a groove 9, a third opening 16 extending in the front-rear direction y is provided. The second opening 15 has a front end 15F positioned in front of the front end 14F of the first opening 14, and a rear end 15R in front of the center 14C of the first groove 14 in the front-rear direction y. The third groove 16 has a front end 16F located behind the center 14C in the front-rear direction y of the first groove 14 and a rear end 16R of the first groove 14. It is provided so as to be located behind the rear end 14R. Thus, if each groove | channel is formed of the opening provided in the upper side absorption layer 12 or the lower side absorption layer 13, it will become easy to form a groove | channel in an absorptive core. A suitable aspect such as a position, a shape, and a size of each opening is the same as the above description regarding the groove.

  Although not shown in FIGS. 5 and 6, an intermediate sheet having a color different from that of the upper absorbent layer 12 and the lower absorbent layer 13 is provided between the upper absorbent layer 12 and the lower absorbent layer 13. It may be. The intermediate sheet is preferably provided so as to overlap at least one of the first opening 14, the second opening 15, and the third opening 16. If the intermediate sheet is thus provided, when the absorbent article is viewed from the top sheet side or the back sheet side, the first opening 14 (the first groove 7) and the second opening 15 (the second opening) The position of the groove 8) or the third opening 16 (third groove 9) can be easily recognized. Therefore, for example, when the absorbent article is mounted, it is easy to bend the absorbent core 4 in the width direction x while recognizing the position of the opening (groove).

  The intermediate sheet is preferably composed of a liquid-permeable sheet material. Examples of such a sheet material include paper sheets such as tissue paper, thin paper, and crepe paper; chemical bond nonwoven fabric, airlaid nonwoven fabric, air-through nonwoven fabric, Nonwoven fabric sheets such as spunlace nonwoven fabric; plastic film sheets having holes, and the like. The color of the intermediate sheet is preferably other than white since the absorbent core 4 is generally white, and examples thereof include blue.

  Next, the structural example of the absorbent article of this invention is demonstrated with reference to FIG. 7 and FIG. The present invention is not limited to the embodiments shown in the drawings. 7 and 8 show an absorbent article including the absorbent core 4 having the upper absorbent layer 12 and the lower absorbent layer 13 as shown in FIGS. 5 and 6. FIG. 7: represents the top view which looked at the urine pad as the absorbent article from the top sheet side. FIG. 8 shows a VIII-VIII cross-sectional view of the absorbent article of FIG. In FIG. 7, the upper side of the figure corresponds to the front side of the absorbent article, and the lower side of the figure corresponds to the rear side of the absorbent article.

  The absorbent article 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent core 4 provided therebetween. The top sheet 2 is disposed so as to face the wearer's skin, and allows excretion such as urine to pass through. The excrement passing through the top sheet 2 is accommodated by the absorbent core 4. The back sheet 3 prevents excrement from leaking outside.

  The absorptive core 4 has the front-back direction y and the width direction x, and has the upper side absorption layer 12 provided in the top sheet side surface, and the lower side absorption layer 13 provided in the back sheet side surface. The upper absorbent layer 12 has a first opening 14 extending in the front-rear direction y as the first groove 7, and the lower absorbent layer 13 is a second opening extended in the front-rear direction y as the second groove 8. 15 and the third groove 9 has a third opening 16 extending in the front-rear direction y. That is, the absorbent core 4 has the first groove 7 formed on the top sheet side surface and extending in the front-rear direction y, and the second groove 8 and the third groove 8 formed on the back sheet side surface and extending in the front-rear direction y. A groove 9 is provided. The details of the first groove 7 (first opening 14), the second groove 8 (second opening 15), and the third groove 9 (third opening 16) are as described above. As a result of the grooves (openings) being provided in this manner, the absorbent article 1 of the present invention increases the diffusivity in the front-rear direction y of the absorbent core 4 such as urine and increases the effect of preventing leakage of urine and the like. It is done. Moreover, the absorptive core 4 is bend | folded in the width direction x, forms a hollow in a wearer's crotch, and can receive now the excretion from a wearer suitably.

  An intermediate sheet 17 is provided between the upper absorbent layer 12 and the lower absorbent layer 13. The intermediate sheet 17 preferably has a color different from that of the upper absorbent layer 12 and the lower absorbent layer 13. In FIG. 7, the intermediate sheet 17 includes the first opening 14, the second opening 15, and the third opening 17. It is provided so as to overlap with the opening 16. By providing the intermediate sheet 17 as described above, the first groove 7, the second groove 8, and the third groove 9 are obtained when the absorbent article 1 is viewed from the top sheet 2 side or the back sheet 3 side. It becomes easy to recognize the position of.

  Further, the back sheet 3 may have a color different from that of the absorbent core 4. If the back sheet 3 has a different color from the absorbent core 4, the first groove 7, the second groove 8, and the third groove 9 when the absorbent article 1 is viewed from the top sheet 2 side. It becomes easy to recognize the position of. The color of the backsheet 2 is preferably other than white since the absorbent core 4 is generally white, and examples thereof include blue.

  If the intermediate sheet 17 and / or the back sheet 3 is colored as described above, for example, when the absorbent article is mounted, it is easy to bend the absorbent core 4 in the width direction x while recognizing the position of the groove. It becomes easy to install the absorptive core 4 in the suitable position between a wearer's crotch.

  As shown in FIG. 8, it is preferable that an upper mount 18 is provided between the top sheet 2 and the absorbent core 4, and a lower mount 19 is provided between the back sheet 3 and the absorbent core 4. . In FIG. 7, the upper mount 18 and the lower mount 19 are omitted. By providing the upper mount 18 and the lower mount 19, the absorbent core 4 is not easily deformed. Further, when the upper absorbent layer 12 and the lower absorbent layer 13 of the absorbent core 4 contain a water absorbent resin, the upper absorbent sheet 18 and the lower mount 19 have the water absorbent resin on the surface of the top sheet 2 or the back sheet 3. The transition is prevented, and the touch of the top sheet 2 and the back sheet 3 is easily maintained well. As the upper mount 18 and the lower mount 19, tissue paper, thin paper, crepe paper, or the like can be used.

  The upper mount 18 is preferably bonded to the upper absorbent layer 12 by a bonding means such as an adhesive. Further, the lower mount 19 is preferably bonded to the lower absorbent layer 13 by a bonding means such as an adhesive. If the upper mount 18 is joined to the upper absorbent layer 12, the shape retention of the upper absorbent layer 12 is improved, and the shape of the first opening 14 formed in the upper absorbent layer 12 is easily maintained. Similarly, if the lower mount 19 is bonded to the lower absorbent layer 13, the shape retention of the lower absorbent layer 13 is enhanced, and the second opening 15 and the third formed in the lower absorbent layer 13 are increased. The shape of the opening 16 is easily maintained.

  The absorbent article 1 may be provided with rising flaps 20 that extend in the front-rear direction y of the absorbent core 4 on both sides in the width direction x of the absorbent core 4. 7 and 8, the side sheet 21 extending in the front-rear direction y is joined to both sides of the top sheet 2 in the width direction x, and the standing elasticity provided at the inner end of the side sheet 21 in the width direction x. Due to the contraction force of the member 22, the inner end of the side seat 21 rises toward the wearer's skin, whereby the rising flap 20 is formed. The rising flap 20 prevents side leakage of urine or the like in the width direction x. The side sheet 21 is composed of a liquid-impermeable plastic film, a liquid-impermeable nonwoven fabric, or the like. Note that the rising flap 20 may have the inner surface of the end portion in the front-rear direction y joined to the top sheet 2, thereby facilitating rising of the rising flap 20.

1: Absorbent article (urine pad)
2: Top sheet 3: Back sheet 4: Absorbent core 5: Top sheet side surface 6: Back sheet side surface 7: First groove 8: Second groove 9: Third groove 12: Upper absorbent layer 13: Lower side absorption layer 14: 1st opening 15: 2nd opening 16: 3rd opening

Claims (9)

An absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent core provided therebetween,
The absorbent core has a front-rear direction and a width direction,
The absorbent core has a first groove formed on the top sheet side surface and extending in the front-rear direction, and has a second groove and a third groove formed on the back sheet side surface and extending in the front-rear direction,
The front end of the second groove is positioned in front of the front end of the first groove, and the rear end of the second groove is in front of the front-rear direction center of the first groove. Position to,
The front end of the third groove is located rearward of the front-rear direction center of the first groove, and the rear end of the third groove is rearward of the rear end of the first groove. Located in
Wherein the first groove and the second groove third groove, the absorbent article characterized that you have provided on the same imaginary line extending in the longitudinal direction of the absorbent core.   The rear end of the second groove is located in front of the front end of the first groove, and / or the front end of the third groove is more than the rear end of the first groove. The absorbent article according to claim 1, which is also located rearward. The absorptive article according to claim 1 or 2 whose width of said 1st slot, said 2nd slot, and said 3rd slot is 5 mm or more and 30 mm or less. The absorbent article according to any one of claims 1 to 3, wherein the virtual line is a center line in the width direction of the absorbent core.   The second groove extends to a front end of the absorbent core, and / or the third groove extends to a rear end of the absorbent core. The absorbent article as described in any one of 4.   The said 2nd groove | channel is widened toward the front, and / or the said 3rd groove | channel is expanded toward the back, The width | variety as described in any one of Claims 1-5. Absorbent article. The absorbent core has an upper absorbent layer provided on the top sheet side surface and a lower absorbent layer provided on the back sheet side surface,
The upper absorbent layer has a first opening extending in the front-rear direction as the first groove,
The lower absorption layer has a second opening extending in the front-rear direction as the second groove, and a third opening extending in the front-rear direction as the third groove. An absorbent article according to any one of the above.   The absorbent article according to claim 7, wherein an intermediate sheet having a color different from that of the upper absorbent layer and the lower absorbent layer is provided between the upper absorbent layer and the lower absorbent layer.   The absorbent article according to any one of claims 1 to 8, wherein the back sheet has a color different from that of the absorbent core.

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