JP6118748B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper having a waist elastic body and a fastener.

  Patent Document 1 discloses a disposable diaper in which a waist elastic body is arranged on the back body. The disposable diaper of patent document 1 is an open type disposable diaper, and the fastener for stopping a back body to the front body is arrange | positioned in the horizontal direction outer side of the waist circumference elastic body of a back body.

JP 2008-183033 A

  When wearing the disposable diaper constituted in this way, after pulling the fastener of the back body to the front body side, the fastener is stopped at the target portion arranged in the front body. The force applied from the fastener to the entire back body is applied to the elastic body around the waist located on the inner side in the lateral direction of the fastener.

  As for the disposable diaper of patent document 1, the position in the vertical direction of a fastener and the position in the vertical direction of a waist elastic body are substantially corresponded. Therefore, when the waist elastic body is pulled laterally outward through the fastener, the force applied to the waist elastic body from the left and right fasteners is connected in a straight line, and the folding base point along the rear edge of the waist elastic body is It is formed. Therefore, in the middle of the rear end edge of the disposable diaper or the waist elastic body extending to the rear side of the waist elastic body, it is easily bent to the non-skin facing surface side by the folding base point. If the rear edge of the disposable diaper is bent toward the non-skin facing surface, the distance between the rear edge of the disposable diaper and the rear edge of the absorbent body is shortened, and excrement may leak from the rear side.

  Then, an object of this invention is to provide the disposable diaper which suppresses that the rear-end edge of a disposable diaper folds to the non-skin opposing surface side, and can prevent the leakage of excrement.

  As a result of intensive research on the relative position of the waist elastic body and the fastener and the deformation of the rear end edge of the disposable diaper, the present applicant has studied how to apply the force of the waist elastic body from the fastener and the disposable by the force. I found the diaper folding base. The disposable diaper according to the present disclosure is configured as follows in order to prevent the rear end edge of the disposable diaper from being folded toward the non-skin facing surface side and prevent the excrement from leaking.

  A disposable diaper according to the present disclosure has a longitudinal direction (longitudinal direction L) and a transverse direction (lateral direction W) perpendicular thereto, a skin facing surface and a non-skin facing surface located on the opposite side, and an absorbent body ( Including the absorber 30), the front waist region (front waist region S1), the rear waist region (rear waist region S2), and the crotch region (crotch region S3) located between the front waist region and the rear waist region A diaper main body (diaper main body 2) including a pair of fasteners (fasteners 70) extending in the lateral direction from the rear waist region, and the diaper main body is laterally outer than the absorber. A leg elastic body (leg elastic body 40) extending in the longitudinal direction and a belt-like waist elastic body (waist elastic body 50) extending in the lateral direction in the rear waist region, The waist circumference in the thickness direction A disposable diaper having a sheet material (surface sheet 10, side sheet 60, and leak-proof sheet 22) that is disposed with an elastic body interposed therebetween and to which the waist elastic body is joined, The end edge (rear end edge 50R) is located on the front side of the rear end edge (rear end edge 2R) of the diaper main body, and is located on the rear side of the rear end edge (rear end edge 30R) of the absorber. The outer edge (outer edge 50E) of the waist elastic body is positioned on the outer side in the lateral direction than the leg elastic body, and the region extending rearward from the leg elastic body is the waist elastic body. And a non-joined region (non-joined region 53) in which the sheet material is not joined to each other, a fastener joining region (a rear end portion at an inner edge of the non-joined region, the diaper main body and the fastener joined) Outer edge of the fastener joining area 71) A first imaginary line (first imaginary line FL1) connecting the rear end portion of the diaper main body has a second imaginary line extending in the vertical direction through the center in the horizontal direction of the diaper main body on the rear side of the rear end edge of the diaper main body. The gist is to intersect the line (second imaginary line FL2).

  ADVANTAGE OF THE INVENTION According to this invention, the disposable diaper which suppresses that the rear-end edge of a disposable diaper folds to the non-skin opposing surface side and can prevent the leakage of excrement can be provided.

It is a top view of the disposable diaper concerning an embodiment. It is sectional drawing in the X1-X'1 line | wire of FIG. It is sectional drawing in the X2-X'2 line | wire of FIG. It is a figure which shows the mounting state of a disposable diaper. It is an enlarged view of the rear-end edge part of the disposable diaper of FIG. It is an enlarged view of the A part of FIG. It is a figure for demonstrating the effect implement | achieved by the disposable diaper which concerns on embodiment.

  Below, the disposable diaper which concerns on embodiment is demonstrated, referring drawings. The disposable diaper which concerns on embodiment is an open type diaper. An open-type diaper is not a diaper that has been molded into a pants shape in advance, but is in a state where it has been unfolded before use, and a diaper that is worn on the user by fastening predetermined parts of the product with tape or the like. Say. The diaper may be an adult diaper or a child diaper.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(1) Overall Configuration of Disposable Diaper FIG. 1 is a plan view of the disposable diaper 1, and FIG. 2 is a cross-sectional view of the X1-X1 ′ cross section shown in FIG. 3 is a cross-sectional view of the X2-X2 ′ cross section shown in FIG. Drawing 4 is a figure showing the wearing state of a disposable diaper, and is the figure seen from the wearer's back side.

  The disposable diaper 1 has a longitudinal direction L extending in the wearer's body front side and the body rear side, a transverse direction W orthogonal to the longitudinal direction, and a thickness direction T. The thickness direction T has a skin facing surface side T1 and a non-skin facing surface side T2 located on the opposite side.

  The disposable diaper 1 corresponds to the front waist region S1 disposed on the wearer's body front side, the rear waist region S2 disposed on the wearer's body rear side, and the wearer's inseam, and the front waist region S1 and rear Crotch area S3 located between waist area S2.

  The disposable diaper 1 has a diaper main body 2 and a fastener 70. The diaper main body 2 includes a top sheet 10, an exterior sheet 20, an absorbent body 30, a leg elastic body 40, a waist elastic body 50, and a side sheet 60.

  The top sheet 10 is provided on the skin facing surface side that contacts the skin of the wearer. The top sheet 10 is formed of a liquid-permeable sheet such as a hydrophilic nonwoven fabric or woven fabric, an apertured plastic film, or an apertured hydrophobic nonwoven fabric. An auxiliary sheet may be arranged between the top sheet 10 and the absorber 30. By providing the auxiliary sheet, the absorption speed of the body fluid can be increased, and the return of the body fluid after absorption can be suppressed. As the auxiliary sheet, for example, an air-through nonwoven fabric or an apertured film is used.

  The side sheet 60 is disposed on the skin facing surface side of the top sheet 10 so as to cover both outer edges of the top sheet 10. For the side sheet 60, a liquid-impermeable sheet or the like is used. The side sheet 60 is bonded to the skin facing surface of the top sheet 10 via an adhesive.

  The inner edge of the side sheet 60 is folded along the vertical direction, and the side sheets overlap each other. A leakproof elastic body 61 is provided in a portion extending along the longitudinal direction L at a portion where the side sheets overlap. The side sheet 60 and the leak-proof elastic body 61 constitute a leak-proof wall that prevents lateral leakage of excrement. The leak-proof wall is provided along the longitudinal direction L on both sides of the absorber 30.

  The exterior sheet 20 includes an exterior nonwoven fabric 21 that comes into contact with clothes, and a liquid-impermeable leak-proof sheet 22 that is positioned on the skin-facing surface side of the exterior nonwoven fabric 21 and formed of a waterproof film (for example, polyethylene). Have. The leak-proof sheet 22 is made of a moisture-permeable or moisture-impermeable film.

  The absorber 30 is provided between the exterior sheet 20 and the top sheet 10. The absorber 30 absorbs the body fluid of the wearer. The absorbent body 30 is formed by an absorbent core made of an absorbent material such as pulverized pulp or a superabsorbent polymer, and a core wrap such as a tissue covering the absorbent core. In the drawings, the core wrap is omitted for convenience. Moreover, the absorber 30 is formed with a plurality of compressed portions obtained by compressing the absorber in the thickness direction. The pressing unit will be described in detail later.

  The side sheet 60 and the exterior sheet 20 are joined to each other on the outer side in the lateral direction than the top sheet 10. The outer edge of the side sheet 60 and the outer edge of the exterior sheet 20 are recessed inward in the lateral direction in the crotch region S3. The area around the dent of the crotch area S3 is a leg circumference area arranged along the wearer's leg circumference. The leg-around elastic body 40 is disposed in the leg-around region.

  The leg-around elastic body 40 is positioned on the outer side in the horizontal direction than the absorber 30 and expands and contracts in the vertical direction L. The leg-around elastic bodies 40 are arranged along the vertical direction L, and three leg elastic bodies 40 are arranged at intervals in the horizontal direction. The leg-around elastic body 40 is fixed between the side sheet 60 and the leak-proof sheet 22 in a state of being extended in the vertical direction L. The number of leg elastic bodies 40 is not limited to three.

  The diaper body 2 of the rear waist region S2 is provided with a belt-like waist elastic body 50 that expands and contracts in the lateral direction W. The belt-like waist elastic body is a waist elastic body having a certain length in a direction (longitudinal direction in the present embodiment) perpendicular to the longitudinal direction (lateral direction in the present embodiment) of the waist elastic body. is there. The waist elastic body 50 is substantially rectangular in a plan view of the extended disposable diaper. The waist elastic body 50 is disposed between the pair of fasteners 70 and extends in the lateral direction across the lateral center of the disposable diaper. The center of the waist elastic body 50 in the horizontal direction coincides with the center of the disposable diaper in the horizontal direction. The outer edge 50 </ b> E of the waist elastic body 50 is located on the outer side in the lateral direction than the leg elastic body 40.

  The rear end edge 50R of the waist elastic body 50 is located on the front side of the rear end edge 2R of the diaper body 2 and is located on the rear side of the rear end edge 30R of the absorber 30. The front end edge 50F of the waist elastic body 50 is located on the rear side of the rear end edge 30R of the absorber 30. The waist elastic body 50 does not overlap the absorber 30 but is separated from the absorber 30.

  In addition, although the waist elastic body 50 of this Embodiment is spaced apart from the absorber 30, you may partially overlap with the absorber 30 as a modification. As the waist elastic body according to the modified example, for example, the front end edge of the waist elastic body is located in front of the rear end edge of the absorber, and the rear end edge of the waist elastic body is more than the rear edge of the absorber. Is also located on the back side.

  The waist elastic body 50 is disposed on the non-skin facing surface side of the top sheet 10 and the side sheet 60 and on the skin facing surface side of the leak-proof sheet 22. The waist elastic body 50 is disposed between the top sheet 10 and the leak-proof sheet 22 and between the side sheet 60 and the leak-proof sheet 22. Therefore, the surface sheet 10, the side sheet 60, and the leak-proof sheet 22 constitute a sheet material that is disposed with the waist elastic body 50 interposed therebetween in the thickness direction. The waist elastic body 50 is bonded to the top sheet 10, the side sheet 60, and the exterior sheet 20. The joining aspect of the waist elastic body 50 will be described in detail later.

  At least a part of the fastener is disposed on an extension line extending laterally outward from the waist elastic body. In other words, in the state where the disposable diaper is viewed from the outside in the lateral direction, at least a part of the waist elastic body 50 and the fastener 70 overlap each other.

  The waist elastic body according to the present embodiment is configured to expand and contract in the horizontal direction, but the waist elastic body may be configured to expand and contract in the horizontal direction and the vertical direction. Moreover, in this embodiment, the waist elastic body 50 is comprised with the elastic sheet. The members constituting the waist elastic body 50 are not particularly limited.

  In the rear waist region S2 of the disposable diaper, a pair of fasteners 70 extending outward in the lateral direction from the side sheet 60 and the exterior sheet 20 constituting the diaper main body 2 are provided. The fastener 70 is joined between the exterior sheet 20 and the side sheet 60. The fastener 70 and the diaper main body 2 are joined at the fastener joining region 71. The fastener 70 is configured by a hook portion 72 that engages with a target portion 75 provided on the non-skin facing surface side of the exterior sheet 20 in the front waist region, and a fixing piece 73 to which the hook portion 72 is attached. The rear end edge 70 </ b> R of the fastener 70 extends linearly along the lateral direction W.

(2) Joining aspect of waist elastic body Next, the joining aspect of the waist elastic body 50 and other members will be described in detail. FIG. 5 is an enlarged view of a waist elastic member in the plan view of FIG. In the region where the waist elastic body 50 is arranged, a first joint region 51 extending laterally outward from the lateral center of the disposable diaper and joining the waist elastic body 50 and the sheet material, and a first joint region 51, a non-joining region 53 where the waist elastic body 50 and the sheet material are not joined to each other, and a waist elastic body 50 located laterally outside the non-joining region 53. And a second joining region 52 to which the sheet material is joined.

  In the cross-sectional view of FIG. 3, a region to which the adhesive for joining the waist elastic body 50 and the sheet material is attached is indicated by R1, and the waist elastic body and the sheet material are overlapped, but the adhesive is not attached. The region is indicated as R2.

  The first joint region 51 includes a region R1 that joins the skin facing surface of the waist elastic body 50 and the non-skin facing surface of the topsheet 10, and the skin of the non-skin facing surface of the waist elastic body 50 and the leak-proof sheet 22. And a region R1 that joins the opposing surfaces. In the non-joining region 53, there are a region R2 in which the skin facing surface of the waist elastic body 50 and the non-skin facing surface of the side sheet 60 are not joined, and the non-skin facing surface of the waist elastic body 50 and the leak-proof sheet 22. A region R2 where the skin facing surface is not joined is provided. The second joint region 52 includes a region R1 that joins the skin facing surface of the waist elastic body 50 and the non-skin facing surface of the side sheet 60, and the skin of the non-skin facing surface of the waist elastic body 50 and the skin of the leak-proof sheet 22. And a region R1 that joins the opposing surfaces.

  Further, the waist elastic body 50 and the side sheet 60 may be joined in the region R1 where the skin facing surface of the waist elastic body 50 and the non-skin facing surface of the topsheet 10 are joined. In this case, since the side sheet which comprises a leak-proof wall can be pulled directly outside, since between leak-proof walls can be used widely, fitting property can be improved.

  The non-joining area | region 53 is provided in the area | region extended from the leg periphery elastic body 40 to the back side. When manufacturing a disposable diaper, the 1st web which comprises one of a side sheet | seat and a leak-proof sheet | seat is conveyed in the continuous state, and the adhesive agent for affixing on an elastic body around a leg is apply | coated. The elastic member which comprises a leg expansion-contraction part is extended in the vertical direction in the continuous state, and the elastic body around the leg in an extended state is disposed on the first web. And the 2nd web which comprises one of a side sheet or a leak-proof sheet is affixed on a 1st web and a leg periphery elastic body.

  Thereby, the 1st web, the 2nd web, and the continuous body with which the elastic body arrange | positioned between these webs continued was manufactured. Next, the continuum is cut along the transverse direction for each individual product length. As a result, the elastic body around the leg that has been stretched contracts in the vertical direction, and only the portion pasted in the vicinity of the opening around the leg by the adhesive remains. Therefore, the leg-hole elastic body can be provided only in the vicinity of the leg-hole opening.

  In order to arrange the leg-hole elastic body 40 in this way, the non-joining region 53 is provided in a range extending in the vertical direction from the region where the leg-hole elastic body is arranged. The non-joining region 53 includes at least one of a sheet material positioned on the skin facing surface side of the waist elastic body and a sheet material positioned on the non-skin facing surface side of the waist elastic body, The surrounding elastic body may be non-joined.

  In the plan view shown in FIG. 1 in the extended state of the disposable diaper, the rear end portion P1 (see FIG. 5) at the inner edge of the non-joining region 53 (the outer edge of the first joining region) and the outside of the fastener joining region 71 A first imaginary line FL1 connecting the rear end portion P2 (see FIG. 5) at the edge is a second imaginary line extending in the vertical direction through the center in the horizontal direction of the diaper body on the rear side of the rear end edge 2R of the diaper body. Intersects line FL2.

  Further, in the plan view shown in FIG. 1 in the extended state of the disposable diaper, the intersection P3 (see FIG. 5) between the outer edge of the second bonding region 52 (the outer edge 50E of the bonding region) and the first imaginary line is the waist circumference It is located behind the third virtual line FL3 that bisects the longitudinal direction of the elastic body.

  Further, in the plan view shown in FIG. 1 in the stretched state of the disposable diaper, the absorbent body 30 includes the rear end edge of the contracted region of the leg elastic body 40 and the point P4 in the horizontal center and the vertical center of the waist elastic body. Are arranged on a fourth virtual line FL4.

  The contraction region of the leg-hole elastic body 40 is a region where the leg-hole elastic body is substantially contracted among the regions where the leg-hole elastic bodies are arranged. In the present embodiment, for convenience of the drawing, the entire region where the leg-around elastic body is arranged is shown as a contraction region. The contraction area of the leg-hole elastic body is an area joined to a side sheet or the like in a state where the leg-hole elastic body is extended. The contraction region of the leg elastic body does not include a region where the leg elastic body is disposed but the leg elastic body is not joined to the side sheet.

  Further, as in the present embodiment, when a plurality of elastic bodies around the legs are arranged in the lateral direction, the rear end edge of the elastic bodies around the legs arranged in the most lateral direction and the side of the elastic body around the waist It is preferable that the absorber 30 is disposed on the fourth virtual line FL4 that connects the center P in the direction and the center P4 in the vertical direction.

  The stretched state of the disposable diaper refers to stretching the elastic body such as the leg-around elastic body and the leak-proof elastic body 61 until the wrinkles such as the top sheet 10 and the side sheet 60 that constitute the disposable diaper cannot be visually recognized. It is the state made to do.

(3) Squeeze part of absorber Absorber 30 is formed with a plurality of squeezing parts that compress the absorber in the thickness direction. FIG. 6 is an enlarged view of a portion A shown in FIG. As shown in FIG. 2, the pressing part is formed on the skin facing surface side of the absorber, and is recessed on the surface side concave portion 31 that is recessed from the surface sheet side toward the exterior sheet side, and on the non-skin facing surface side of the absorber. A back-side recess 32 that is formed and is recessed from the exterior sheet side toward the top sheet side. The pressing part is formed by compressing the absorber in the thickness direction T by embossing.

  The front surface side recess 31 is compressed from the skin facing surface side T1 toward the non-skin facing surface side T2, and is recessed from the skin facing surface side T1 toward the non-skin facing surface side T2. The skin facing surface of the disposable diaper is formed with a recess disposed along the surface-side recess 31 of the absorbent body 30. The concave portion is formed by arranging the top sheet 10 along the front side concave portion 31 of the absorber 30.

  Moreover, the back surface side recessed part 32 is compressed toward the skin opposing surface side T1 from the non-skin opposing surface side T2, and is dented toward the skin opposing surface side T1 from the non-skin opposing surface side T2. The non-skin facing surface of the disposable diaper is formed with a recess disposed along the back surface side recess 32 of the absorbent body 30. The recess is formed by arranging the exterior nonwoven fabric 21 and the leak-proof sheet 22 along the back surface side recess 32 of the absorber 30.

  Subsequently, the shape of the pressing part formed in the absorber is demonstrated. In plan view, the shape of the front surface side recess 31 and the shape of the back surface side recess 32 of the present embodiment are the same, and therefore, in the following description, the shape of the front surface side recess 31 will be described as an example.

  In addition, the shape of the surface side recessed part 31 and the shape of the back surface side recessed part 32 are not restricted to the same structure, The shape of the surface side recessed part 31 and the shape of the back surface side recessed part 32 may differ. Furthermore, the pressing part should just have at least any one among the surface side recessed part 31 and the back surface side recessed part 32. FIG.

  The surface side recessed part 31 cross | intersects the 1st pressing part 33 extended in the 1st inclination direction C1 which cross | intersects the vertical direction and a horizontal direction of a disposable diaper, the 1st inclination direction C1, and cross | intersects a vertical direction and a horizontal direction. And a second pressing portion 34 extending in the two inclined directions C2.

  The first squeezing parts 33 and the second squeezing parts 34 are alternately formed along the longitudinal direction L, and are alternately formed along the transverse direction W with an interval. Therefore, a plurality of wavy linear pressing portions 35 that are continuous in the vertical direction are formed in the absorber. The linear pressing part 35 is comprised by the 1st pressing part 33 and the 2nd pressing part 34 which continue in a line along the vertical direction.

  In the region between the first pressing unit 33 and the second pressing unit 34 adjacent in the longitudinal direction and the region between the first pressing unit 33 and the second pressing unit 34 adjacent in the product direction, the pressing unit is formed. A non-squeezed area 36 is provided.

  The longitudinal length L33 of the first pressing portion 33 is longer than the lateral length W33 of the first pressing portion 33, and the longitudinal length L34 of the second pressing portion 33 is the lateral direction of the second pressing portion. Longer than W34. Therefore, the shape of the non-compressed area 36 has a longer dimension in the vertical direction than a dimension in the horizontal direction. Moreover, the shape in planar view of the non-compressed area | region 36 is a rhombus shape.

  By such a linear pressing part 35, a lattice-shaped pressing groove is formed on the skin-facing surface of the absorber. The extending direction of the pressing groove is different from the vertical direction and the horizontal direction.

(4) Actions / Effects When wearing such disposable diapers to the wearer, wear the crotch region in the crotch of the wearer while pulling the fastener located on the back side of the wearer in the lateral direction. It arrange | positions in a person's front side and the said fastener is fixed to the target part 75. FIG.

  When the fastener 70 is pulled in the lateral direction W at the time of wearing, the force applied from the fastener 70 to the diaper main body branches from the outer edge of the fastener joining region 71 where the fastener 70 is joined to the diaper main body 2 in the rearward direction and the footing direction. . In the case of a disposable diaper having an elastic body around the waist, the outer edge of the first joint area 51 that starts at the shrinkage of the first joint area 51 is applied to the first joint area 51 that becomes the contraction base point of the waist elastic body. Take 51E.

  Therefore, a force is applied to the first imaginary line FL1 connecting the rear end portion at the outer edge of the first joint region and the rear end portion at the outer edge of the fastener joint region. Therefore, as shown in FIG. 4, a disposable diaper becomes easy to bend the rear-end edge of a diaper main body on the basis of a 1st virtual line. The fasteners are spaced apart from each other on the left and right, and when the left and right first imaginary lines intersect on the product, the entire rear end edge of the diaper body may be bent with the first imaginary line as a base point. When the entire rear edge of the diaper body is bent, the diaper body is partially turned over, and the diaper body cannot be sufficiently covered around the waist of the wearer, or the diaper body is lifted by the crease, and between the diaper body and the wearer. A gap may be formed. In addition, if the rear edge of the diaper body is bent toward the non-skin facing surface, the distance between the rear edge of the diaper body and the rear edge of the absorbent body in the wearing state is shortened, and excrement may leak from the rear side. .

  However, since the disposable diaper according to the present embodiment intersects the first virtual line FL1 and the second virtual line FL2 on the rear side of the rear end edge 2R of the diaper body, the left and right first virtual lines FL1 are the diaper body. Do not cross over. Therefore, it can suppress that the rear end edge of a diaper main body breaks. Therefore, a wearer's back can be covered appropriately and the leak from the rear-end edge of a diaper main body can be suppressed.

  In addition, since the outer edge of the waist elastic body is positioned laterally outside the leg elastic body, the wearer can obtain a sense of stretch of the side seat when the fastener is pulled during wearing. It can be installed with an appropriate degree of expansion and contraction.

  At the time of wearing, the leg elastic body can be continuously pulled outward in the lateral direction by the second joining region located laterally outside the leg elastic body. Therefore, the leg-around elastic body can be arranged in a wide state, and the function of the leg-around elastic body is easily exhibited.

  In addition, if the waist elastic body is joined to the sheet material in the region extending rearward from the leg elastic body, the waist elastic body is pulled forward by the contraction of the leg elastic body, and the waist elastic body There is a possibility that the shrinkage in the direction is hindered. However, since the non-joining region is provided in the region extending from the leg elastic body to the rear side, it is possible to suppress the contraction of the waist elastic body due to the contraction of the leg elastic body.

  The rear end edge of the waist elastic body is located in front of the rear end edge of the diaper main body. Therefore, wrinkles due to contraction of the waist elastic body are unlikely to occur at the rear end edge of the diaper main body. When wrinkles occur at the rear end edge of the diaper body, a gap is formed between the wearer's body and the rear end edge of the diaper main body due to the unevenness of the wrinkles, and excrement leakage may occur. However, since wrinkles are unlikely to occur at the rear end edge of the diaper main body, the rear end edge of the diaper main body is arranged along the wearer's skin.

  Further, when the fastener is pulled outward in the lateral direction, the fulcrum of the lateral force related to the waist elastic body is the intersection of the outer edge of the second joining region 52 closest to the fastener and the first virtual line FL1. The fastener and the second joining region are spaced apart from each other on the left and right, and a straight line connecting the intersections that exist on the left and right is a force line related to the waist elastic body 50.

  For example, when the line of force coincides with the third virtual line FL3 that bisects the waist elastic body in the longitudinal direction, there is a risk that about half of the waist elastic body will be folded back starting from the force line. In addition, when the force line is positioned on the front side of the third virtual line FL3 that bisects the waist elastic body in the longitudinal direction, there is a possibility that folding may occur on the rear side of the force line. However, since the force line is positioned behind the third virtual line FL3 that bisects the waist elastic body in the longitudinal direction, the entire waist elastic body is worn along the force line by the wearer. It acts to press against the side and no wrapping occurs.

  Further, since at least a part of the fastener is disposed on the extension line extending outward in the lateral direction from the waist elastic body, the waist elastic body can be extended by a force pulling in the lateral direction via the fastener. Therefore, the waist circumference can be suppressed by contraction of the waist elastic body.

  Since the lattice-shaped pressing groove is formed in the absorbent body, the rigidity of the absorbent body is increased. Therefore, even when a force that contracts in the lateral direction is applied by the waist elastic body, wrinkles are unlikely to occur in the absorbent body. Furthermore, even when a force that contracts in the lateral direction is applied by the waist elastic body, the absorbent body is deformed from the squeezed portion, so that the absorbent body can be used without shrinking. .

  In general, when the disposable diaper is sandwiched between the legs of the wearer, the absorbent body is easily broken along the folding base point extending in the vertical direction, and there is a risk of inducing leakage of soft urine and urine. However, in the disposable diaper according to the present embodiment, the absorbent body is deformed with the compressed portion as a base point, and therefore a portion that induces leakage of soft stool and urine rises to the skin facing surface side. Therefore, the entire surface of the absorber can be used in three dimensions. The absorber is easily deformed particularly with the surface-side recess 31 as a base point. Therefore, it is preferable that at least the surface-side concave portion 31 is formed in the absorber. More preferably, the front surface side recessed part 31 and the back surface side recessed part 32 may be formed in the absorber. The absorber is further easily deformed with the front surface side recess 31 and the back surface side recess 32 as the base points.

  In addition, when a force is applied from the fastener toward the foot-feeding direction, the absorber is deformed from the grid-shaped compressed grooves as a base point, and the front side of the force applied in the foot-feeding direction is pulled toward the skin facing surface side by the elastic body around the legs. Therefore, the absorber is easily deformed in a protruding manner toward the skin facing surface side. Further, the front edge of the waist elastic body is also easily deformed in a protruding manner toward the skin facing surface. Therefore, it can suppress that a waist elastic body bends to the non-skin opposing surface side. In addition, the region outside in the lateral direction from the absorbent body is pulled forward by the elastic body around the legs.

  More specifically, the absorber 30 rises in the longitudinal direction L when the absorber 30 is pulled in a direction toward the inside of the longitudinal direction L by the leg elastic body. That is, the disposable diaper 1 changes from the state shown in FIG. 7A to the state shown in FIG. As a result, the absorbent body 30 fits along the shape of the wearer's buttocks, and the excrement of the wearer hardly leaks from the longitudinal direction L.

  The region between the absorber 30 and the waist elastic body 50 is lower than the rigidity of the waist elastic body 50 and the rigidity of the absorber 30 because the absorber 30 and the waist elastic body are not arranged. Therefore, when the absorbent body 30 rises in the vertical direction L, the pocket structure P is formed by the gap that exists between the absorbent body 30 and the waist elastic body 50 as shown in FIG.

  With such a pocket structure, the wearer's excrement can be temporarily retained, and leakage of the wearer's excrement from the longitudinal direction L can be further prevented.

  Since the rear end edge of the fastener according to the present embodiment extends linearly in the lateral direction, the interlocking between the fastener and the waist elastic body can be secured. For example, when the dimension of the inner edge of the fastener is longer than the dimension of the outer edge of the fastener and the fastener is disposed on the first imaginary line, the pulling force through the fastener is difficult to be applied to the waist elastic body. .

  More specifically, the force from the rear end portion at the outer edge of the fastener joint region where the fastener is joined to the sheet material to the rear end portion at the outer edge of the first joint region is inhibited by the fastener on the first imaginary line. . Therefore, the interlocking | linkage of a fastener and a waist elastic body may deteriorate.

  However, the rear end edge of the fastener extends linearly in the lateral direction, and the fastener is not disposed on the first imaginary line. Therefore, it is possible to ensure the interlocking between the fastener and the waist elastic body.

  Moreover, since the absorber is arrange | positioned on the 4th virtual line, the shrinkage | contraction in the vertical direction by an elastic body around a leg and the shrinkage | contraction in the horizontal direction by a waist elastic body can be made to act independently, respectively.

(5) Other Embodiments As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it is understood that the description and drawings constituting a part of this disclosure limit the present invention. Should not. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  Moreover, although the disposable diaper which concerns on this Embodiment can be applied in the disposable diaper which has a waist elastic body, it can apply to the disposable diaper whose bending resistance of a waist elastic body is 70 N or less more suitably. In the case of a bending resistance exceeding 70 N, the waist elastic body does not follow the curve of the body, and the fit may be reduced. Furthermore, when the bending resistance exceeds 70 N, a folding start point is likely to be formed, and the folding starting point may damage the skin.

The bending resistance can be measured by, for example, the following cantilever method.
A material constituting the waist elastic body is cut out in a size of 20 mm × 150 mm, and a test piece is prepared. Prepare 5 sheets for each material to be measured.
The test piece is sandwiched under the holding plate of a cantilever (DAIEI KAGAKU SEIKI MFG / CAN-IMCA), and the test piece is pushed out in a slanting direction at a constant speed (5 mm / sec). Measure the moving length when bent from the horizontal to the inclined table. Next, the movement length is measured in the same manner with the back of the test piece facing up. The average value of the movement length in the front state and the movement length in the back state is defined as bending resistance (mm).
Higher bending resistance means that the material is less likely to bend (high rigidity).

  Moreover, the 1st pressing part and the 2nd pressing part may be comprised by the dimension of the horizontal direction longer than the dimension of the vertical direction. Moreover, the 1st pressing part and the 2nd pressing part may be alternately formed in the vertical direction at intervals, and may be formed alternately in the horizontal direction.

  The waist elastic body and the fastener may overlap at least partially. When the waist elastic body and the fastener overlap, the force relating to the fastener can be directly transmitted to the waist elastic body, and the interlocking between the waist elastic body and the fastener can be improved.

1: Disposable diaper 2: Diaper body 10: Surface sheet 20: Exterior sheet 21: Exterior nonwoven fabric 22: Leak-proof sheet 30: Absorbent body 31: Front side recess 32: Back side recess 33: First pressing part 34: Second pressing Part 35: Linear compression part 40: Leg elastic body 50: Waist elastic body 51: First joining area 52: Second joining area 53: Non-joining area 60: Side sheet 61: Leakproof elastic body 70: Fastener 71 : Fastener joining region 72: Hook part 73: Fixing piece 75: Target part C1: 1st inclination direction C2: 2nd inclination direction FL1: 1st virtual line FL2: 2nd virtual line FL3: 3rd virtual line FL4: 4th Virtual line L: Longitudinal direction P: Pocket structure S1: Front waist region S2: Rear waist region S3: Crotch region T: Thickness direction T1: Skin facing surface side T2: Non-skin facing surface side W: Horizontal direction

Claims (5)

It has a longitudinal direction and a transverse direction orthogonal thereto, and the non-skin-facing surface located on the skin-facing surface and the opposite side, and
A diaper body including an absorbent body, including a front waist region, a rear waist region, and a crotch region located between the front waist region and the rear waist region;
A pair of fasteners extending in the lateral direction from the rear waist region,
The diaper body is
An elastic body around the legs that is positioned laterally outside the absorbent body and expands and contracts in the longitudinal direction;
In the rear waist region, a belt-like waist elastic body that expands and contracts in the lateral direction;
A disposable diaper having a sheet material that is disposed across the waist elastic body in the thickness direction and to which the waist elastic body is joined,
The rear end edge of the waist elastic body is located on the front side of the rear end edge of the diaper main body, and is located on the rear side of the rear end edge of the absorber,
The outer edge of the waist elastic body is located on the outer side in the lateral direction than the leg elastic body,
The region extending from the leg elastic body to the rear side is a non-joined region where the waist elastic body and the sheet material are not joined to each other
The first imaginary line connecting the rear end portion at the inner edge of the non-joining region and the rear end portion at the outer edge of the fastener joining region where the diaper main body and the fastener are joined is the rear end of the diaper main body. in rearward of the edge, Ri Majiwa a second imaginary line extending through and longitudinally transverse center of the diaper main body,
On the extension line extending laterally outward from the waist elastic body, at least a part of the fastener is disposed,
The intersection of the outer edge of the joining area where the waist elastic body and the sheet material are joined and the first imaginary line is behind the third imaginary line that bisects the longitudinal direction of the waist elastic body. Disposable diapers located in The absorber is disposed between the pair of fasteners,
On the skin-facing surface of the absorbent body, lattice-shaped compressed grooves are formed,
The disposable diaper according to claim 1, wherein an extending direction of the compressed groove is different from the vertical direction and the horizontal direction. The disposable diaper according to claim 1 or 2 , wherein a rear end edge of the fastener extends linearly along the lateral direction. The said absorber is arrange | positioned on the 4th imaginary line which connects the rear end edge of the contraction area | region of the said leg elastic body, and the point of the horizontal direction center of the said waist elastic body, and the vertical direction center. The disposable diaper according to any one of claims 1 to 3 . The disposable diaper according to any one of claims 1 to 4 , wherein the waist elastic body and the fastener overlap at least partially.

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