JP5570876B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a pants-type disposable diaper.

  Conventionally, a pants-type disposable diaper having a trunk opening at the upper end and a pair of leg openings at the lower part has been used as one of the absorbent articles that receive excrement from the wearer. In such a disposable diaper, in the exterior sheet in which the front part covering the front side of the wearer and the rear part covering the rear side are continuous via the intermediate part, both side ends of the front part are respectively joined to both side ends of the rear part. Thus, a trunk opening and a pair of leg openings are formed. Moreover, the absorber which absorbs excrement from a wearer is attached on an exterior sheet ranging from a front part to a back part. Furthermore, a pair of leg-holes elastic members are joined on the exterior sheet along the edges on both side edges of the intermediate portion, and the leg-hole elastic members contract to form a leg-hole gather.

  In Patent Document 1, in the front body (front part) of a pants-type disposable diaper, both ends are elastic elastic members positioned on both side ends of the front body, the center is inflated to the crotch side, and the center is absorbed Disclosed is a technique for preventing urine or stool leakage from the abdominal side by lifting the absorber to the front body edge (the edge of the trunk opening) side by disposing the body so as to intersect with the body disposition position. . Moreover, in patent document 2, in each of a front body and a back body, the 1st elastic member for mounting | wearing arrange | positioned with the waist opening part edge (edge of trunk | drum opening) as a start end, and the joint edge part of both sides ends as a termination | terminus, By providing a second elastic member for wearing arranged with the waist opening edge as the starting end and the leg opening edge (edge of the leg opening) as the terminal, the wearer grasps the waist opening and moves upward A disposable diaper that can easily pull up the diaper by the elastic force of the mounting elastic member when the diaper is pulled up is disclosed.

  In Patent Document 3, in an open-type disposable diaper in which a front part and a rear part are fastened around and attached to a waist part, a body gather disposed between a waist part elastic member and an end part of an absorber. The plurality of body elastic members for forming are arranged in a curved manner so that the interval between the respective body elastic members is the narrowest at a substantially central portion in the length direction, and are provided more than the absorber. Further, there is disclosed a structure in which both end portions of the body elastic member are positioned on the side of the absorber.

Japanese Patent Laid-Open No. 10-127687 JP 2006-263346 A JP-A-10-179634

  By the way, in order to properly absorb excrement with the absorbent body, it is preferable that the absorbent body is in close contact with the wearer's crotch, and excrement that has not been absorbed by the absorbent body leaks out from around the legs. In order to prevent this, it is preferable that the leg gathers are in close contact with the wearer's groin. However, when the pants-type disposable diaper is worn, it is not easy to bring the absorbent body into close contact with the wearer's crotch and to make the leg-gather gathers into close contact with the wearer's groin.

  The present invention has been made in view of the above-described problems, and has an object to easily bring the absorbent body into close contact with the wearer's crotch portion and to make the leg-gather gathers into close contact with the wearer's groin at the time of wearing.

The invention according to claim 1 is a pants-type disposable diaper having a trunk opening at the upper end and a pair of leg openings at the lower end, and a front part covering the front side of the wearer and a rear part covering the rear side Bending at the intermediate part between the two parts, both side ends of the front part are respectively joined to both side ends of the rear part, thereby forming a trunk opening at the upper end of the front part and the rear part, An exterior sheet in which a pair of leg openings are formed on both sides of the intermediate part below the front part and the rear part, and an absorbent body that is attached on the exterior sheet and absorbs excrement from the wearer A pair of leg-around elastic members that are joined onto the exterior sheet in a stretched state along the edges of both side edges of the intermediate portion and contract to form a leg-around gather, and in the front part or the rear part Both of the absorber In the position of the square, and a pair of convex elastic member bent to be joined by a stretched state on the outer sheet so as to be convex to the upper side, one end of the pair of convex elastic member, It overlaps the absorbent body, or, Ru is arranged in the vicinity of the absorber.

  Invention of Claim 2 is a disposable diaper of Claim 1, Comprising: In the joining position of the said front part and the said back part, a pair of convex elastic member is a pair of leg circumference elastic member Close to or touching.

  Invention of Claim 3 is the disposable diaper of Claim 1 or 2, Comprising: One end is located in the said absorber vicinity, the other end is located in the said upper end side rather than the said one end, and is in an expansion | extension state And a pair of auxiliary elastic members joined to the exterior sheet.

Invention of Claim 4 is a disposable diaper in any one of Claim 1 thru | or 3 , Comprising: Another pair of convex elastic members similar to said pair of convex elastic members are further provided, The said pair The convex elastic member and the other pair of convex elastic members are provided on the front portion and the rear portion, respectively.

  ADVANTAGE OF THE INVENTION According to this invention, while attaching an absorber to a wearer's crotch part easily at the time of mounting | wearing, a leg circumference gather can be easily stuck to a wearer's groin part.

Moreover, in invention of Claim 2, it can suppress that a motion of a leg is prevented by a convex-shaped elastic member, and in invention of Claim 3 and 4 , it adheres to a wearer's crotch part still more easily. Can be made.

It is a perspective view which shows the external appearance of a disposable diaper. It is a top view of the disposable diaper of the unfolded state. It is sectional drawing of a disposable diaper. It is a figure which shows the disposable diaper of a comparative example. It is a top view of other examples of a disposable diaper.

  FIG. 1 is a perspective view showing an appearance of a disposable diaper 1 according to an embodiment of the present invention. As shown in FIG. 1, the disposable diaper 1 is a pants type having a trunk opening 11 at the upper end, which is the upper end in FIG. 1, and a pair of leg openings 12 in the lower part. Receive excrement. In addition, the up-down direction of FIG. 1 is not necessarily a gravity direction.

  FIG. 2 is a plan view of the disposable diaper 1 as seen from the wearer side in a developed state. As shown in FIG. 2, the disposable diaper 1 is a substantially sheet-like absorbent body that is mounted on the outer sheet 4 and the inner surface of the outer sheet 4 (that is, the surface on the wearer side) and absorbs excrement from the wearer. 20 and two sheet members 5 (also referred to as end sheets or end press sheets) joined on the exterior sheet 4 so as to cover both ends of the absorbent body 20 in the longitudinal direction (that is, the vertical direction in FIG. 2). ). Each sheet member 5 is provided over substantially the entire width of the exterior sheet 4 in the lateral direction of FIG. Hereinafter, the horizontal direction in FIG. 2 is referred to as a “diaper width direction”.

  In the disposable diaper 1, the upper part in FIG. 2 covers the wearer's front side (abdominal skin), and the lower part in FIG. 2 covers the wearer's rear side (skin on the back side). In the following description, the portions covering the front side and the rear side of the wearer are referred to as “front portion 401” and “rear portion 403”, respectively, and are continuous from both sides between the front portion 401 and the rear portion 403 and are worn by the wearer. A portion facing the crotch portion is referred to as “intermediate portion 402”.

  When the disposable diaper 1 is manufactured, the exterior sheet 4 is bent together with the absorbent body 20 at the intermediate portion 402, and the left and right ends of the front portion 401 when the intermediate portion 402 is disposed on the lower side, and the rear The left and right ends of the part 403 are joined by heat fusion by heating and pressing. In this way, by joining the both side ends of the front portion 401 and the both side ends of the rear portion 403, as shown in FIG. 1, the trunk opening 11 is formed at the upper ends of the front portion 401 and the rear portion 403, A pair of leg openings 12 are formed on both sides of the intermediate portion 402 below the front portion 401 and the rear portion 403.

  FIG. 3 is a cross-sectional view of the disposable diaper 1 cut at the position AA shown in FIG. 2 (that is, the intermediate portion 402). In FIG. 3, the structure of the disposable diaper 1 is drawn away from each other for convenience of illustration.

  As shown in FIG. 2 and FIG. 3, the absorbent body 20 is disposed on the substantially sheet-like main body 2 and on both sides of the main body 2 (that is, both ends in the width direction of the diaper). A pair of side seats 3 is provided over substantially the entire length in the longitudinal direction. As shown in FIG. 3, the main body 2 includes a top sheet 21, a back sheet 23, and an absorbent core 22 disposed between the top sheet 21 and the back sheet 23. In FIG. 2, the outline of the absorbent core 22 is drawn with a thick broken line for easy understanding of the drawing. As shown in FIG. 2, the width at both longitudinal ends of the absorbent core 22 is larger than the width at the central portion of the absorbent core 22 in the longitudinal direction. In other words, the absorption core 22 has a so-called hourglass shape.

  3 is bonded onto the exterior sheet 4 by a hot melt adhesive or the like, and the absorbent body 20 is fixed to the exterior sheet 4. In the disposable diaper 1 of FIG. 2, the absorber 20 is arrange | positioned ranging from the front part 401 to the back part 403, and each edge part of the absorber 20 is pinched | interposed between the sheet | seat member 5 and the exterior sheet | seat 4, The absorber 20 is firmly fixed on the exterior sheet 4.

  As shown in FIG. 3, each side seat 3 has a belt-like joint 33 that is a part on the main body 2 side and a second part with a fold line 39 provided over the entire length in the longitudinal direction as a boundary. A side wall 34 is provided. The joining portion 33 is joined to the upper side (that is, the wearer side) of the main body portion 2 using a hot melt adhesive over substantially the entire length in the longitudinal direction in the vicinity of the side edge of the main body portion 2.

  The side wall part 34 which continues from the joint part 33 via the fold line 39 is overlapped on the joint part 33 at both ends in the longitudinal direction, and is fixed on the joint part 33 by heat fusion bonding or ultrasonic bonding. In FIG. 2, in order to facilitate understanding of the drawing, a parallel oblique line is given to a portion 341 of the side wall portion 34 fixed on the joint portion 33. Moreover, the side wall part 34 is provided with the standing part 342 which stands up from the main-body part 2 in the center in a longitudinal direction, as shown in FIG.2 and FIG.3. As shown in FIG. 3, in the side wall portion 34, the elastic member 35 is joined to the free end of the upright portion 342, and the elastic member 35 contracts to form a gather in the upright portion 342.

  The top sheet 21 is a liquid-permeable sheet material, for example, a non-woven fabric formed of hydrophilic fibers, and quickly captures moisture of excrement from the wearer and moves it to the absorbent core 22. Nonwoven fabrics used as the top sheet 21 are, for example, point bond nonwoven fabrics, air-through nonwoven fabrics, and spunlace nonwoven fabrics. As hydrophilic fibers forming these nonwoven fabrics, cellulose, rayon, cotton, or the like is usually used. In addition, as the top sheet 21, a liquid-permeable nonwoven fabric formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon) whose surfaces are hydrophilically treated with a surfactant may be used.

  The absorbent core 22 is made by mixing a hydrophilic fiber such as pulverized pulp fiber or cellulose fiber with a superabsorbent polymer (SAP (Super Absorbent Polymer)) or a superabsorbent material such as a superabsorbent fiber. It is formed by wrapping with a liquid-permeable nonwoven fabric or the like, and absorbs moisture that has passed through the top sheet 21 and quickly fixes it. Tissue paper, liquid-permeable nonwoven fabric, etc. that wraps hydrophilic fibers are joined to the hydrophilic fibers and water-absorbing material with a hot-melt adhesive, and the shape of the hydrophilic fibers is lost. Prevent later dropout). In the present embodiment, the absorbent core 22 includes pulp fibers and SAP.

  As the back sheet 23, a water-repellent or liquid-impervious nonwoven fabric (for example, a spunbond nonwoven fabric, a meltblown nonwoven fabric, an SMS (spunbond / meltblown / spunbond) nonwoven fabric) formed of hydrophobic fibers, A liquid-impervious plastic film is used to prevent excretion from reaching the back sheet 23 from exuding to the outside of the main body 2. When a plastic film is used for the back sheet 23, a plastic film having moisture permeability (breathability) may be used from the viewpoint of preventing the disposable diaper 1 from being stuffy and improving the wearer's comfort. preferable.

  As the sheet body of the side sheet 3, a water-repellent or liquid-impervious nonwoven fabric (for example, a spunbond nonwoven fabric, a melt blown nonwoven fabric, or an SMS nonwoven fabric) formed of hydrophobic fibers is used. As the elastic member 35, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used. In the present embodiment, the polyurethane thread is used as the elastic member 35. The sheet member 5 is made of the same material as the top sheet 21 or a water-repellent or hydrophilic treated nonwoven fabric (for example, a spunbond nonwoven fabric, a melt blown nonwoven fabric, or an SMS nonwoven fabric).

  The exterior sheet 4 includes an inner sheet 41 and an outer sheet 42 laminated on the inner sheet 41 on the lower side of the inner sheet 41 (that is, the side opposite to the wearer). As shown in FIG. 2, a plurality of leg elastic elements 430, a plurality of waist elastic elements 440, a plurality of convex elastic elements 450, and a plurality of auxiliary elastics are provided between the inner sheet 41 and the outer sheet 42. Elements 460 are joined by hot melt adhesive or the like.

  Specifically, a plurality of waistline elastic elements 440 each extending in the width direction of the diaper are arranged on the front portion 401 and the rear portion 403 in a direction perpendicular to the width direction of the diaper. Actually, the plurality of waistline elastic elements 440 are joined to the exterior sheet 4 in an expanded state and contracted to contract the exterior sheet 4 to form a body gather. Among the plurality of waist elastic elements 440, some waist elastic elements 440 arranged in the vicinity of the edge of the body opening 11 (see FIG. 1) are arranged closely, and these waist elastic elements 440 are arranged closely. Thus, the disposable diaper 1 fits strongly around the waist of the wearer.

  Two leg elastic elements 430 are joined in a stretched state along the edge of each side portion of the intermediate portion 402 in FIG. 2 on the front portion 401 side. One end of each leg elastic element 430 overlaps with the absorbent body 20 in the vicinity of the longitudinal center of the absorbent body 20 (more precisely, when viewed from a direction perpendicular to the exterior sheet 4), and the other end is a front portion. 401 is located at the side end of the portion on the intermediate portion 402 side. Similarly, three leg-holes elastic elements 430 are joined in a stretched state along the edges of the side parts of the intermediate part 402 on the side part of the rear part 403 side. One end of 430 overlaps with the absorber 20, and the other end is located on the side end of the rear portion 403. In the disposable diaper 1, a set of six leg elastic elements 430 provided on the front part 401 side and the rear part 403 side on each side part of the intermediate part 402 constitutes one leg elastic member 43. When the surrounding elastic member 43 contracts, the exterior sheet 4 on the side portion contracts. In this manner, by providing the pair of leg-hole elastic members 43 along the edges on both sides of the intermediate portion 402, a pair of leg-hole gathers (leg gathers) are formed. In the exterior sheet 4 of the disposable diaper 1, there is an elastic element non-existing region between the leg elastic element 430 on the front part 401 side and the leg elastic element 430 on the rear part 403 side on each side of the intermediate part 402. Provided.

  In addition, on each side of the absorbent body 20 in the front portion 401, three convex elastic elements 450 are arranged in a convex shape that swells on the side opposite to the intermediate portion 402 (upper side in FIG. 2). One end of each convex elastic element 450 overlaps the end of the absorbent body 20 on the front portion 401 side, and the other end is a side end of the front portion 401 (that is, the front portion 401 and the rear portion 403 in the disposable diaper 1 of FIG. At or near the leg elastic element 430. Similarly, in the rear portion 403, three convex elastic elements 450 are arranged on each side of the absorbent body 20 in a convex shape that swells on the side opposite to the intermediate portion 402 (the lower side in FIG. 2). Is done. One end of each convex elastic element 450 is overlapped with the end of the absorber 20 on the rear part 403 side, and the other end is close to or in contact with the leg-hole elastic element 430 at the side end of the rear part 403. Actually, a plurality of (all) convex elastic elements 450 in the front part 401 and the rear part 403 are joined on the exterior sheet 4 in an extended state, and in each of the front part 401 and the rear part 403, A set of three convex elastic elements 450 located on each side of the absorbent body 20 contracts as one convex elastic member 45.

  Thus, in each of the front part 401 and the rear part 403 of the disposable diaper 1, the pair of convex elastic members 45 are joined to the exterior sheet 4 in an extended state at positions on both sides of the absorbent body 20. The corresponding portion of the exterior sheet 4 contracts due to the contraction of the convex elastic member 45. Thereby, in the disposable diaper 1 (refer FIG. 1) which joined the both ends of the front part 401 to the both ends of the back part 403, respectively, the upper end side of the disposable diaper 1 from the edge part vicinity of the absorber 20, and a diaper Of the convex elastic member 45 extending toward the outer side in the width direction (the direction away from the absorber 20) (the portion denoted by reference numeral 451 in FIG. 2 and hereinafter referred to as “first inclined portion 451”). The end of the absorber 20 is pulled up to the upper end side. Moreover, it is a site | part (it attaches | subjects the code | symbol 452 in FIG. 2) the convex elastic member 45 extended toward the upper end side from the vicinity of a leg circumference gather, and the width direction inner side (direction approaching the absorber 20). Hereinafter, the leg gathers (the part in the vicinity of the front part 401 or the rear part 403) are pulled up to the upper end side by the “second inclined part 452”.

  Further, in the exterior sheet 4, three auxiliary elastic elements 460 are joined in an extended state to each side of the end portion on the front portion 401 side of the absorbent body 20. Each auxiliary elastic element 460 extends from the end portion of the absorbent body 20 toward the upper side in FIG. 2 and toward the outer side in the width direction of the diaper. One end overlaps the end portion of the absorbent body 20 and the other end is the front side. The leg elastic element 430 and the convex elastic element 450 are close to or in contact with the side end of the portion 401. Similarly, in the exterior sheet 4, the three auxiliary elastic elements 460 are joined in an extended state to each side of the end of the absorber 20 on the rear part 403 side. Each auxiliary elastic element 460 extends from the end of the absorber 20 to the lower side of FIG. 2 and toward the outer side in the width direction of the diaper. One end overlaps the end of the absorber 20 and the other end The leg elastic element 430 and the convex elastic element 450 are close to or in contact with the side edge of the rear part 403.

  In the disposable diaper 1, a set of three auxiliary elastic elements 460 positioned on each side functions as the auxiliary elastic member 46 at each of the end on the front portion 401 side and the end on the rear portion 403 side of the absorbent body 20. To do. Therefore, in the disposable diaper 1 (see FIG. 1) in which both side ends of the front portion 401 are joined to both side ends of the rear portion 403, the end portion on the front portion 401 side and the end portion on the rear portion 403 side of the absorbent body 20 are provided. Are pulled up to the upper end side of the disposable diaper 1 by contraction of the pair of auxiliary elastic members 46.

  As the inner sheet 41 and the outer sheet 42 of the exterior sheet 4 in FIG. 3, a water-repellent or liquid-impervious non-woven fabric or plastic film formed of hydrophobic fibers is used similarly to the back sheet 23, or A laminated sheet in which these nonwoven fabrics and plastic films are laminated is used. As a plastic film, what has moisture permeability (air permeability) is preferable. Further, as the inner sheet 41 and the outer sheet 42, similarly to the top sheet 21, a nonwoven fabric formed of hydrophilic fibers or a liquid-permeable nonwoven fabric formed of hydrophobic fibers subjected to hydrophilic treatment may be used.

  The leg elastic element 430, the waist elastic element 440, the convex elastic element 450, and the auxiliary elastic element 460 are similar to the elastic member 35 of the side sheet 3, for example, polyurethane yarn, belt-like polyurethane film, yarn-like or A band-like natural rubber or the like is used, and in this embodiment, polyurethane yarn is used as the leg elastic element 430, the waist elastic element 440, the convex elastic element 450, and the auxiliary elastic element 460. Note that the number of elastic elements constituting the leg-around elastic member 43, the convex elastic member 45, and the auxiliary elastic member 46 may be arbitrarily changed, and each elastic member may be constituted by one elastic element.

  When the disposable diaper 1 shown in FIG. 1 is worn, after the legs of the wearer are inserted into the pair of leg openings 12 through the trunk openings 11, the disposable diaper 1 is pulled up to the circumference of the wearer's waist. It is done. At this time, the first inclined portion 451 of the convex elastic member 45 in FIG. 2 and the auxiliary elastic member 46 pull up each end of the absorber 20 upward (on the head side of the wearer), and the absorber 20 is worn. It adheres to the crotch of the person. Further, the second gathered portion 452 of the convex elastic member 45 raises the leg gathers upward, and the leg gathers closely contact the wearer's groin.

  FIG. 4 is a view showing a disposable diaper 9 of a comparative example, and corresponds to FIG. In the disposable diaper 9 of the comparative example, the convex elastic member 45 and the auxiliary elastic member 46 in the disposable diaper 1 of FIG. 2 are omitted. In the mounting of the disposable diaper 9 of the comparative example, after the wearer's legs are inserted into the pair of leg openings, even if the disposable diaper 9 is simply pulled up to the waist of the wearer, the absorbent body 91 can be moved to the crotch of the wearer. It is not easy to make the leg circumference gathers formed by the leg circumference elastic member 92 in close contact with the wearer's groin. In a state where the absorbent body 91 is not in close contact with the wearer's crotch, there is a possibility that excrement may not be properly absorbed by the absorbent body 91, and in a state where the leg gathers are not in close contact with the wearer's groin. There is a risk that excrement that has not been absorbed by the absorber 91 may leak out from around the legs.

  On the other hand, in the disposable diaper 1 in FIG. 2, the convex elastic member 45 is located at the upper end side of the disposable diaper 1 (that is, in the longitudinal direction) at each side position of the absorber 20 in the front part 401 and the rear part 403. The outer sheet 4 is joined to the outer sheet 4 in a stretched state curved so as to be convex. Thereby, the both ends of the absorbent body 20 are pulled up to the upper end side by the convex elastic member 45 at the time of wearing, and the absorbent body 20 is easily brought into close contact with the wearer's crotch portion. The leg gathers can be easily brought into close contact with the wearer's groin by pulling up to the upper end side. Further, in each of the front portion 401 and the rear portion 403, the pair of convex elastic members 45 realize the lifting of the end portion of the absorber 20 and the gathers around the legs, so that the end portion of the absorber 20 is on the upper end side. The manufacturing cost of the disposable diaper can be reduced as compared with the case where the elastic member for pulling up and the elastic member for pulling up the leg gathers to the upper end side are provided separately.

  Moreover, in the disposable diaper 1, one end is located in the edge part of the absorber 20, and a pair of auxiliary | assistant elastic member 46 located in the upper end side of the disposable diaper 1 rather than the said one end is on the exterior sheet 4 in the expansion | extension state. To be joined. Thereby, the auxiliary elastic member 46 and the convex elastic member 45 cooperate to pull up the end portion of the absorbent body 20 to the upper end side, so that the absorbent body 20 is more easily adhered to the crotch portion of the wearer. it can.

  FIG. 5 is a view showing another example of a disposable diaper, and corresponds to FIG. In the disposable diaper 1a of FIG. 5, the shape of the convex elastic member 45a is different from that of the disposable diaper 1 of FIG. 2, and the auxiliary elastic member 46 is omitted. Other configurations are the same as those in FIG.

  In each of the front portion 401 and the rear portion 403, the convex elastic member 45a (each convex elastic element 450a thereof) is disposed in a convex shape that swells on the opposite side to the intermediate portion 402, and one end portion is an absorber. 20 overlaps with the longitudinal end portion, and the other end portion is located at the side end of the intermediate portion 402. Further, the convex elastic member 45 a intersects the leg elastic member 43 (the leg elastic element 430) in the vicinity of the side end of the intermediate portion 402.

  In the disposable diaper 1a (see FIG. 1) in which both side ends of the front portion 401 are joined to both side ends of the rear portion 403, the width direction of the diaper from the vicinity of the end portion of the absorbent body 20 to the upper end side of the disposable diaper 1a. The end of the absorbent body 20 is pulled up to the upper end side by the first inclined portion 451a of the convex elastic member 45a extending outward (in the direction away from the absorbent body 20). Further, the gathers around the legs are formed by the second inclined portion 452a of the convex elastic member 45a extending from the side end of the intermediate portion 402 toward the upper end side and toward the inner side in the width direction of the diaper (direction approaching the absorber 20). Pulled up to the side. Further, on both sides at each end of the absorbent body 20, the region of the inner surface of the exterior sheet 4 surrounded by the pair of convex elastic members 45a, the pair of leg-surrounding elastic members 43, and the absorbent body 20 (reference numeral in FIG. 5). 47), a pair of pocket portions that are recessed on the side opposite to the wearer is formed by contraction of the pair of convex elastic members 45a and the pair of leg elastic members 43. In the disposable diaper 1a, even when excrement leaks from the absorber 20, the excrement is captured in the pocket portion.

  As explained above, in the disposable diaper 1a, the convex elastic member 45a is curved so as to be convex toward the upper end side, and is joined to the exterior sheet 4 in an extended state. Thereby, the both ends of the absorbent body 20 are pulled up to the upper end side by the convex elastic member 45a at the time of wearing, and the absorbent body 20 is easily adhered to the crotch part of the wearer. The leg gathers can be easily brought into close contact with the wearer's groin by pulling up to the upper end side.

  By the way, in the disposable diaper 1a of FIG. 5, since the edge part of the convex elastic member 45a is located in the side edge of the intermediate part 402, depending on the wearer, when a leg is raised and lowered during walking, the movement of the leg is hindered. Sometimes it feels like Therefore, in order to prevent the movement of the leg from being hindered by the convex elastic member, as shown in FIG. 2, the end of the convex elastic member 45 (and the auxiliary elastic member 46) is connected to the front portion 401 and the rear portion. It is preferable that the leg-around elastic member 43 be close to or in contact with the joint member 403.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made.

  In the disposable diaper 1, 1a, a pair of convex elastic members 45, 45a may be provided only on one of the front portion 401 and the rear portion 403. In this case, the pair of convex elastic members 45, 45a is attached. Sometimes one end of the absorbent body 20 is pulled up to the upper end side of the disposable diaper 1, 1 a so that the absorbent body 20 is easily brought into close contact with the wearer's crotch part, and the gathers around the leg are also pulled up to the upper end side, The gather can be easily brought into close contact with the wearer's groin. In addition, when providing a pair of convex elastic members 45 and 45a only in one of the front part 401 and the back part 403, from a viewpoint of absorbing excrement appropriately in the absorber 20, a pair of convex elastic members 45, 45a is preferably provided in the front portion 401. Further, in order to make the absorbent body 20 more easily adhere to the wearer's crotch part and to make the leg gathers more easily adhere to the wearer's groin, as shown in FIG. It is preferable that an elastic member is provided in each of the front part 401 and the rear part 403.

  In one manufacturing method of disposable diapers, after joining a continuous polyurethane yarn on the exterior sheet, the polyurethane thread is cut together with the exterior sheet to form an elastic element, so that a minute hole is formed in the exterior sheet. There is. Therefore, when a disposable diaper is manufactured by the above manufacturing method, as shown in FIGS. 2 and 5, the elastic elements in the leg-around elastic member 43, the convex elastic members 45 and 45a, and the auxiliary elastic member 46 are used. It is preferable that one end (that is, the cutting position) overlaps with the absorbent body 20 and the hole of the exterior sheet is covered with the absorbent body 20. When a disposable diaper is manufactured by another manufacturing method, or when the above-mentioned hole of the exterior sheet is not a problem, the elastic elements in the leg elastic member 43, the convex elastic members 45 and 45a, and the auxiliary elastic member 46 If one end is disposed in the vicinity of the absorber 20, it does not necessarily have to overlap the absorber 20.

  The configurations in the above-described embodiments and modifications may be combined as appropriate as long as they do not contradict each other.

DESCRIPTION OF SYMBOLS 1,1a Disposable diaper 4 Exterior sheet 11 trunk | drum opening 12 leg opening 20 absorber 43 leg circumference elastic member 45, 45a convex elastic member 46 auxiliary | assistant elastic member 401 front part 402 intermediate part 403 back part

Claims (4)

A pants-type disposable diaper having a trunk opening at the top and a pair of leg openings at the bottom,
Bending at an intermediate portion between a front part covering the front side of the wearer and a rear part covering the rear side, both side ends of the front part are respectively joined to both side ends of the rear part, An exterior sheet in which a trunk opening is formed at the upper end of the rear part, and a pair of leg openings are formed on both sides of the intermediate part below the front part and the rear part,
An absorber attached on the exterior sheet to absorb excrement from the wearer;
A pair of leg-around elastic members that are joined on the exterior sheet in a stretched state along the edges of both side edges of the intermediate portion and contract to form a leg-around gather;
A pair of convex elastic members that are curved to be convex toward the upper end side and bonded onto the exterior sheet in a stretched state at positions on both sides of the absorber in the front part or the rear part;
Equipped with a,
Disposable diaper end of the pair of convex elastic member, overlaps the absorbent body, or, characterized by Rukoto disposed in the vicinity of the absorber. The disposable diaper according to claim 1,
The disposable diaper characterized in that the pair of convex elastic members are close to or in contact with the pair of leg-around elastic members at a joint position between the front portion and the rear portion. The disposable diaper according to claim 1 or 2,
Disposable further comprising: a pair of auxiliary elastic members having one end positioned in the vicinity of the absorber and the other end positioned closer to the upper end than the one end and joined to the exterior sheet in an extended state Diapers. The disposable diaper according to any one of claims 1 to 3 ,
Further comprising another pair of convex elastic members similar to the pair of convex elastic members,
The disposable diaper characterized in that the pair of convex elastic members and the other pair of convex elastic members are provided on the front part and the rear part, respectively.

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