JP5584058B2 - Absorbent articles - Google Patents

Description

  The present invention relates to a pants-type disposable diaper in which a front body and a back body can be engaged and separated, and more particularly, to a pants-type disposable diaper capable of adjusting the fit of an underbody.

Patent Document 1 describes a disposable diaper in which a hook member is attached to the front body panel side of the rear body panel, and the hook members are engaged and connected along the inner surfaces of both side portions of the front body panel.
Patent Document 2 discloses a disposable in which fixing means are provided on both sides of a front end portion and a rear end portion, a loop member is provided on a fixing means located on one diagonal line, and a hook member is provided on a fixing means located on the other diagonal line. Diapers are listed.
In Patent Document 3, loop members are attached to the inner surfaces of both sides of the rear waist area, support members folded in a Z shape are provided on the inner surfaces of both sides of the front waist area, and a hook member is provided on the inner surface of the front end of the support member. A disposable diaper is described in which the attachment, loop member and hook member are engaged and connected.
The disposable diapers described in Patent Documents 1 to 3 reduce the burden on the wearer or caregiver because the wearer can attach and replace the pants without taking off the pants.

However, when the disposable diaper is pulled up on the wearer's crotch, or when the wearer is seated, there is a risk that the engaging portions on both sides are disengaged.
In order to solve the above-described problem, Patent Documents 4 and 5 include means for preventing disengagement of an engaging part that removably connects the front and rear side edges of a disposable diaper using a fastening element having high shear engagement strength. It is disclosed.

JP 2005-533529 A JP 2007-504884 A JP 2008-12115 A JP 2009-125393 A JP 2009-273732 A

  However, in the case of a pants-type disposable diaper (hereinafter referred to as a disposable diaper) in which front and rear side edges are engaged with a fastening element having a high connection shear engagement strength, it is difficult to pull up the disposable diaper on the wearer's crotch. In addition, the wearer's thighs may be over-pressed.

  On the other hand, in the case of a disposable diaper whose front and rear side edges are engaged with a fastening element having a low connection shear engagement strength, or a disposable diaper that is slightly larger in size, it is easy to pull up the disposable diaper on the wearer's crotch However, there is a risk that the wearability of the wearer's undercarriage cannot be sufficiently secured and external leakage of urine, body fluids, etc. may occur.

  Also, there is a possibility that the engagement between the rear waist area and the front waist area may be peeled off due to the force from the thigh caused by the wearer's walking, sitting, etc., and the connecting means may be inadvertently separated. When a vertical force is applied to the surrounding area from the inner surface to the outer surface, the engagement between the rear waist area and the front waist area easily peels off and the coupling means is likely to be separated.

  Therefore, an object of the present invention is to provide a disposable diaper that is easily pulled up to the crotch portion of the wearer, can adjust the fit to the wearer, and can reliably maintain the connecting means.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
An exterior sheet having a front body and a back body, and an interior body including an absorbent body fixed to the inner surface of the exterior sheet, and the front body and the back body of the exterior sheet are coupled by a coupling means that can be engaged and separated. In a disposable diaper in which a waist opening and a pair of left and right leg openings are formed,
The connecting means includes a first engagement portion extending in the vertical direction along both side edges of the outer surface of the front body, a second engagement portion extending in the vertical direction along both side edges of the inner surface of the front body, and the inner surface of the support member A third engaging portion that extends in the longitudinal direction at the center in the width direction of the first member, and a fourth engaging portion that extends in the longitudinal direction along the outer edge in the width direction of the inner surface of the support member.
The support member is fixed to both side portions of the inner surface of the back body by a fixing portion extending in the longitudinal direction at the center portion in the width direction of the outer surface of the support member,
The third and fourth engaging portions are inwardly centered on the fixing portion, with the portion of the support member positioned on the inner side in the width direction than the fixing portion and the portion of the support member positioned on the outer side in the width direction with respect to the fixing portion. Are provided at positions that do not face each other
The front body and the back body are connected by engaging the first engagement portion and the fourth engagement portion, and engaging the second engagement portion and the third engagement portion ,
A plurality of the third and fourth engaging portions are provided at intervals in the vertical direction, and the vertical overlapping length of the third and fourth engaging portions with respect to the vertical length of the fourth engaging portion. The rate is set at 50% or less,
A disposable diaper characterized by that.

(Function and effect)
According to the first aspect of the present invention, since the support member is fixed to both side portions of the inner surface of the back body by the fixing portion extending in the vertical direction at the center in the width direction of the outer surface of the support member, the disposable diaper is mounted. Sometimes, the wearer can hold the disposable diaper between the crotch because the first and second engagement portions provided on the outer inner surface of the exterior sheet can be sandwiched by the third and fourth engagement portions provided on the support member from the outer inner surface. When pulling up to the portion, the engagement surfaces of the first and fourth engaging portions and the second and third engaging portions can be prevented from peeling off.

  In addition, the third and fourth engaging portions overlap a portion of the support member located on the inner side in the width direction from the fixing portion and a portion of the support member located on the outer side in the width direction from the fixing portion, with the fixing portion as a center. Since they are provided in positions that do not face each other when combined, the connecting parts on both sides of the front and back body of the exterior sheet do not become excessively hard, so when the wearer pulls up the disposable diaper to the crotch, the wearer's Even when the thighs and the connecting portion are rubbed, trauma to the wearer's skin can be prevented.

  Furthermore, the front body and the back body are connected by engaging the first engagement portion and the fourth engagement portion, and engaging the second engagement portion and the third engagement portion. Even when a vertical force is applied from the inner surface to the outer surface due to activities associated with the wearer's life, one of the engaging parts remains engaged, and the front and rear bodies of the exterior sheet are securely connected. Maintained.

Further, a plurality of third and fourth engaging portions are provided at intervals in the vertical direction, and the vertical overlapping length ratio of the third and fourth engaging portions with respect to the vertical length of the fourth engaging portion. 50% or less, in particular, since the connecting portion has flexibility in the vertical direction, the wearer can easily pull up the disposable diaper when pulling up the disposable diaper to the crotch portion. Even if the wearer's thigh and the connecting portion are rubbed, trauma to the wearer's skin can be prevented.

<Invention of Claim 2 >
A plurality of the third and fourth engaging portions are provided at intervals in the vertical direction, and the vertical overlapping length of the third and fourth engaging portions with respect to the vertical length of the fourth engaging portion. the disposable diaper of claim 1 wherein the rate is provided to 0%.

(Function and effect)
According to the second aspect of the present invention, the plurality of third and fourth engaging portions are provided at intervals in the vertical direction, and the third and fourth engaging portions with respect to the vertical length of the fourth engaging portion. Since the overlapping length ratio in the vertical direction is set to 0%, the connecting portion has flexibility in the width direction and the vertical direction, so when the wearer pulls up the disposable diaper to the crotch portion, Even when the wearer's thigh and the connecting portion are rubbed, trauma to the wearer's skin can be prevented, and the disposable diaper can be fitted around the waist and around the legs.

<Invention of Claim 3 >
An even number of the fourth engagement portions are provided at intervals in the vertical direction, and are worn from the outer edge in the width direction between the fourth engagement portions and the fourth engagement portions located in the central portion in the vertical direction. The disposable diaper of Claim 1 or 2 provided with the slit extended to the position corresponding to a person's iliac bone.

(Function and effect)
According to invention of Claim 3 , an even number of 4th engaging part is provided in the vertical direction at intervals, and it is between the 4th engaging part and the 4th engaging part which are located in the vertical direction center part. Since the slit extending from the outer edge in the width direction to the position corresponding to the wearer's iliac is provided, the first engagement portion is formed at the upper and lower portions of the iliac so as to avoid the wearer's iliac that is generally a recess. And the fourth engaging portion can be engaged with each other, so that the fit around the waist and around the legs is improved, and even a thin wearer is excellent in fit.

<Invention of Claim 4 >
The disposable diaper according to any one of claims 1 to 3 , wherein an elastic member is disposed on the support member and is extendable in the width direction.

(Function and effect)
According to the fourth aspect of the present invention, since the elastic member is arranged on the support member and can be extended in the width direction, the wearer adjusts the engagement position so that the wearer fits the body on the front surface of the body. The width of the front and back bodies of the exterior sheet can be shortened, which is economically advantageous.

<Invention of Claim 5 >
The disposable diaper according to any one of claims 1 to 4 , wherein the first and second engaging portions are formed of a loop material, and the third and fourth engaging portions are formed of a hook material.

(Function and effect)
According to the fifth aspect of the present invention, the first and second engaging portions are formed of a loop material, and the third and fourth engaging portions are formed of a hook material. Even if the second engagement portion comes into contact with the skin of the wearer, there is no fear of causing injury to the wearer's skin.

  As described above, according to the present invention, it is possible to provide a disposable diaper that is easily pulled up to the crotch portion of the wearer, can adjust the fit to the wearer, and can reliably maintain the connecting means.

It is an inner surface top view of the disposable diaper of a deployment state. It is an outer surface top view of the disposable diaper of a deployment state. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. It is an enlarged view of the support member of 1st Embodiment. It is the figure which piled up the support member of 1st Embodiment inward with the adhering part. It is an enlarged view of the support member of 2nd Embodiment. It is the figure which piled up the support member of 2nd Embodiment inward with the adhering part. It is an enlarged view of the support member of 3rd Embodiment. It is the figure which piled up the supporting member of 3rd Embodiment inward with the adhering part. It is a perspective view of the front body side of the disposable diaper of 1st Embodiment. It is a perspective view of the back body side of the disposable diaper of 1st Embodiment. It is a perspective view of the wearing state of the disposable diaper of a 1st embodiment.

  Embodiments of the present invention will be described with reference to the accompanying drawings. In addition, although the embodiment illustrated the disposable diaper for adults as a disposable diaper, it is not limited to a disposable diaper for adults, It can apply also to the disposable diaper for infants.

  In the following description, “inner surface” means the wearing surface side of the disposable diaper, “outer surface” means the side opposite to the wearing surface side of the disposable diaper, and “upper portion” means the waist opening side. The “lower part” means the part of the leg opening side part, and the “overlapping length ratio (%)” means the fourth engaging part as shown in FIGS. When the length is L2, and the length L1 where the third engagement portion and the fourth engagement portion overlap is a value calculated by the equation 1 = 2 × L1 / L2 × 100.

(First embodiment)
As shown in FIGS. 1-8, the disposable diaper 1 of 1st Embodiment of this invention was fixed to the inner surface of this exterior sheet 20, and the exterior sheet 20 which has the front body F and the back body B, and was integrated. The interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 and a liquid-impermeable back sheet 12. In manufacturing, after the back surface of the interior body 10 is fixed to the inner surface (upper surface) of the exterior sheet 20 by a joining means such as a hot melt adhesive G, the interior body 10 and the exterior sheet 20 are the front body F and the back body. The waist opening and a pair of left and right leg openings are formed by folding at the center in the longitudinal direction (front-rear direction), which is the boundary of B, and connecting both sides thereof by connecting means that can be engaged and separated from each other. Disposable diaper 1

  In the disposable diaper 1, first engaging portions 40 made of loop members extending in the vertical direction along both side edges are attached to both side portions of the outer surface of the front body F, and along both side edges to both side portions of the inner surface of the front body F. A second engaging portion 41 made of a loop member extending in the vertical direction is attached.

  The both sides of the back body B are fixed in the longitudinal direction along the both sides of the inner surface of the back body B by fixing portions 46 extending in the longitudinal direction at the center in the width direction of the outer surface of the support member 45.

  The outer surface of the support member 45 positioned on the inner side in the width direction from the fixing portion 46 of the support member 45 and the outer surface of the support member 45 positioned on the outer side in the width direction from the fixing portion 46 of the support member 45 are not fixed to the back body B. The support member 45 positioned on the inner side in the width direction from the fixing portion 46 and the support member 45 positioned on the outer side in the width direction from the fixing portion 46 with the fixing portion 46 as the center may be overlapped inward so that the inner surfaces thereof face each other. it can.

A third engagement portion 42 extending in the vertical direction along the inner edge in the width direction of the support member 45 is provided on the inner surface of the support member 45 located on the inner side in the width direction from the fixing portion 46. A fourth engagement portion 43 extending in the vertical direction along the outer edge in the width direction of the support member 45 is provided on the inner surface of the support member 45 located at the position.
Unlike the first embodiment, a hook member can be attached to the first and second engaging portions 40 and 41, and a loop member can be attached to the third and fourth engaging portions 42 and 43.

  When the wearer wears the disposable diaper 1, the fourth engagement portion 43 provided on the inner surface of the support member 45 of the rear body B is provided on the outer surface of the front body F as shown in FIGS. 13 to 15. The third engagement portion 42 that is engaged from the outer surface of the first engagement portion 40 and is provided on the inner surface of the support member 45 of the rear body B is replaced by the second engagement portion 41 that is provided on the inner surface of the front body F. Furthermore, the front body F and the back body B are connected by engaging from the inner surface to form a disposable diaper 1.

(Exterior sheet)
As shown in FIGS. 1-8, the exterior sheet 20 is made into the nonwoven fabric sheet of the 2 layer structure which consists of 20 A of upper layer nonwoven fabrics, and the lower layer nonwoven fabric 20B. Various elastic members are arranged between the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B and between the nonwoven fabrics of the folded portion 20C formed by folding the lower layer nonwoven fabric 20B to the inner surface side at the waist opening edge, thereby imparting elasticity. The planar shape has a pseudo hourglass shape as a whole by concave leg-around lines 29 formed to form leg openings on both sides of the middle.

  As shown in FIGS. 1 and 2, the elastic portion of the exterior sheet 20 is vertically spaced between the waist elastic members 24, 24, and the front body F and the back body B arranged in the vicinity of the waist opening 23. And a plurality of waistline elastic members 25, 25. Arranged along the width direction, and in each of the front body F and the back body B, separately from the waistline elastic member groups 25, 25. From the connecting side portions 21 and 22 that connect the front body F and the back body B to the opposite side of the body as it goes to the center in the width direction, up to a portion that overlaps both sides of the interior body 10 (or both sides) The curved elastic members 26, 28, which extend and do not cross each other and are spaced apart from each other, are provided. In addition, in this exterior sheet 20, what is called a leg periphery elastic member substantially continuous along the leg periphery line 29 is not provided.

  The waist elastic members 24, 24. Are arranged in the vertical direction in the vicinity of the waist opening edge within the range of the connecting side parts 21, 22 where the front body F and the back body B are connected. It is a thread rubber-like elastic member, and is used to attach a disposable diaper to the body by applying an expansion / contraction force so as to tighten around the waist of the body. For the waist elastic member 24, rubber thread is used in the illustrated example. However, for example, a tape-like elastic member may be used. Moreover, although the waist part elastic members 24 and 24 * of the illustration form are clamped between the nonwoven fabrics of the folding | returning part 20C of the lower layer nonwoven fabric 20B in a waist part, even if it clamps between 20 A of upper layer nonwoven fabrics, and the lower layer nonwoven fabric 20B. good.

  The waist elastic members 25, 25. Are elastic rubber thread-like elastic members arranged in the width direction at intervals in the vertical direction over the range from the upper part to the lower part of the connecting side parts 21, 22. It is a member for applying a stretching force in the width direction to the waist portions of the front body F and the back body B, respectively, to bring the disposable diaper into close contact with the body. Note that the boundary between the waist elastic members 24 and 24 and the waist elastic members 25 and 25 is not necessarily clear. For example, among the elastic members arranged in the width direction with an interval in the vertical direction on the front body F and the back body B, even if the number cannot be specified, several on the upper side function as the waist elastic members. The remaining elastic members only have to function as waist elastic members.

  In the back body B, the dorsal curved elastic members 26, 26, which are arranged separately from the waist elastic members 25, 25, have an acute angle crossing angle θ (hereinafter referred to as the vertical direction) with the vertical direction in the middle in the longitudinal direction. A predetermined curve in which the vertical crossing angle θ increases within a range of 0 ° to 90 ° from the minimum point toward the both sides in the width direction, and In a state where the disposable diaper is unfolded, it is arranged along a predetermined curve having a crossing portion 71 having a vertical crossing angle θ of 60 · or less in a region overlapping with both side portions of the interior body. There may be one dorsal curved elastic member 26, but it is preferable that there are a plurality of dorsal curved elastic members 26. In the illustrated example, there are five elastic rubber-like elastic members, and these dorsal curved elastic members 26, 26. They are arranged at intervals without crossing. The dorsal curved elastic member groups 26, 26. are arranged so as to form a predetermined expansion / contraction zone, rather than a few bundles of elastic expansion / contraction members with a close spacing therebetween. Three or more, preferably five or more are arranged with an interval of about 3 to 20 mm, preferably about 6 to 16 mm.

  In the front body F of the exterior sheet 20, the ventral curved elastic members 28, 28. Arranged separately from the waist elastic member groups 25, 25. Is a predetermined curve in which the longitudinal crossing angle θ increases within the range of 0 degrees to 90 degrees from the minimum point toward both sides in the width direction, and the disposable diaper is developed. In the state, it is arranged along a predetermined curve having a crossing portion 70 having a vertical crossing angle θ of 60 · or less in a region overlapping with both side portions of the interior body. There may be one ventral curved elastic member 28, but it is preferable that there are a plurality of ventral curved elastic members 28. In the illustrated example, there are five thread-like elastic members, and these ventral curved elastic members 28, 28. Without being spaced apart. The ventral curved elastic member groups 28, 28. are not substantially arranged as a bundle of about a few elastic elastic members with a close interval, but to form a predetermined elastic zone. Three or more, preferably five or more are arranged with an interval of about 3 to 20 mm, preferably about 6 to 16 mm.

  In the illustrated example, the waist elastic members 25 and 25 and the curved elastic members 26 and 28 arranged in the front body F and the back body B are not provided in a portion crossing the interior body 10, This portion is a non-stretchable region. Thus, the form which does not have or is not provided with the elastic member includes the form in which the elastic member is present, but also the form in which the elastic member is present but is finely cut to the extent that the contraction force does not act. For example, as the latter example, the waist elastic members 25 and 25 and the curved elastic members 26 and 28 are connected to the other (opposite) side across the interior body 10 from the connection side portions 21 and 22 on one side. After continuously providing to the side part 22, the general form which cut | disconnects part or all of the part which traverses the interior body 10, and makes it discontinuous is contained. By making the elastic member discontinuous at the portion overlapping the interior body 10, it is possible to further prevent the interior body (particularly, the absorbent body 13) from contracting in the width direction. Of course, the waist elastic members 25 and 25 and the curved elastic members 26 and 28 can be continuously disposed across the interior body 10.

  The above-described exterior sheet 20 can be manufactured by, for example, techniques described in Japanese Patent Application Laid-Open No. 4-28363 and Japanese Patent Application Laid-Open No. 11-332913. Moreover, in order to cut | disconnect the curved elastic members 26 and 28 on the interior body 10, it describes in Unexamined-Japanese-Patent No. 2002-35029, Unexamined-Japanese-Patent No. 2002-178428, and Unexamined-Japanese-Patent No. 2002-273808. The cutting method to be used is preferably employed.

  Unlike the illustrated example, the curved elastic members 26 and 28 may be provided only on one of the front body F and the back body B. When the curved elastic members 26, 28 are provided on both the front body F and the back body B, part or all of the group of the curved elastic members 28 arranged on the front body F side and the back body B Although a form (not shown) in which a part or all of the group of the curved elastic members 26 · arranged on the side intersects can be adopted, the curved elastic member 28 arranged on the front body F side as in the illustrated example. The group and the group of curved elastic members 26 arranged on the back body B side are separated from each other in the longitudinal direction at a position slightly deviated from the front-rear intermediate portion, particularly the front body F without crossing each other. The minimum vertical separation distance in the vertical separation range 90 is preferably about 10 to 15 mm, and a wide fixed region described later is preferably provided in this portion.

  Further, the curved elastic members 26, 28 may not be entirely curved as in the illustrated example, and may partially have a linear portion.

(Connecting means)
As shown in FIGS. 1, 2, and 5, the connection side portions 21 on both sides of the front body F of the exterior sheet 20 are first engaged with the outer surface of the front body F in the longitudinal direction along both side edges. A portion 40 is attached, and a second engagement portion 41 extending in the longitudinal direction along both side edges is attached to the inner surface of the front body F.

A loop member and a hook member can be used for the first engaging portion 40 and the second engaging portion 41, but the second engaging portion 41 is on the inner surface of the front body F that contacts the skin side of the wearer. Since it is attached, it is suitable to use a loop member for the 1st engaging part 40 and the 2nd engaging part 41 from a viewpoint which prevents giving a wound to a wearer's skin.
Moreover, in order to prevent peeling of the upper nonwoven fabric 20A and the second engaging portion 41 of the exterior sheet 20 and the lower nonwoven fabric 20B and the first engaging portion 40 of the exterior sheet 20, the first engaging portion 40 and the second engaging portion 40 are prevented. It is preferable not to arrange the waist elastic members 24, 24, waist elastic members 25, 25, and ventral curved elastic members 28, 28 on the connecting side portion 21 of the exterior sheet 20 to which the portion 41 is attached. It is.
In addition, the 1st engaging part 40 and the 2nd engaging part 41 are each fixed to the upper-layer nonwoven fabric 20A and the lower-layer nonwoven fabric 20B of the exterior sheet 20 with a well-known adhesive agent, thermal, or an ultrasonic bond.

  As shown in FIGS. 1, 2, and 6, the connecting side portions 22 on both sides of the back body B of the exterior sheet 20 are provided with support members 45 that extend in the width direction on the upper nonwoven fabric 20 </ b> A of the exterior sheet 20. It has been.

The support member 45 has a rectangular shape with a width of 55 to 110 mm and a length of 170 to 330 mm, and a fixing portion 46 extending in the vertical direction located 25 mm wide outside from the width direction inner edge of the outer surface of the support member 45 is formed on the exterior sheet 20. The upper nonwoven fabric 20A is attached by heat sealing.
In addition, although the fixing | fixed part 46 changes with sizes of the disposable diaper 1, in the case of the normal disposable diaper 1 for adults, in order to have required fixing intensity | strength, it is a rectangular shape of width 2-5mm and length 170-330mm.

  The pair of support members 45 are fixed to the upper nonwoven fabric 20 </ b> A of the outer sheet 20 with the outer surface of the support member 45 a positioned on the inner side in the width direction from the fixing portion 46 and the outer surface of the support member 45 b positioned on the outer side in the width direction from the fixing portion 46. However, the support member 45a and the support member 45b can be bent inward so that the inner surface of the support member 45a and the inner surface of the support member 45b face each other around the fixing portion 46.

  As the support member 45, various materials such as a nonwoven fabric, a woven fabric, and a mesh fabric can be used, but in order to fit and wear the disposable diaper 1 around the wearer's suspension, a stretchable nonwoven fabric that expands and contracts in the width direction. The stretchable nonwoven fabric includes a form in which an elastic member is disposed between the nonwoven fabrics and a form in which a stretchable film is disposed between the nonwoven fabrics.

Although the whole support member 45 can be made of a stretchable nonwoven fabric, the fourth engagement of the support member 45b and the space between the outer edge in the width direction of the third engagement portion 42 of the support member 45a and the fixing portion 46 of the support member 45b. It is preferable to arrange a stretchable nonwoven fabric between the inner edge in the width direction of the joint portion 43 and the fixing portion 46 of the support member 45.
In particular, when a stretchable nonwoven fabric is disposed between the inner edge in the width direction of the fourth engagement portion 43 of the support member 45b and the fixing portion 46 of the support member 45, the wearer pulls up the disposable diaper 1 to the crotch portion. Moreover, the engagement position of the 1st engaging part 40 and the 4th engaging part 43 can be adjusted easily, and the disposable diaper 1 can be easily fitted around a waist part and a leg part.
Further, the stretchable nonwoven fabric acts as a drag force against the vertical force caused by the thighs, disperses the vertical force, and can prevent the front body F and the back body B of the exterior sheet 20 from peeling off.

  As shown in FIG. 7, a third engagement portion 42 extending along the vertical direction along the fixing portion 46 is attached to the inner side in the width direction of the fixing portion 46 on the inner surface of the support member 45a. A fourth engaging portion 43 extending in the vertical direction along the widthwise outer edge is attached to the widthwise outer side portion of the inner surface.

As the third engaging portion 42 and the fourth engaging portion 43, a loop member and a hook member can be used. As described above, from the viewpoint of preventing injury to the wearer's skin, the first engaging portion is used. Since it is preferable to use a loop member for the joint portion 40 and the second engagement portion 41, it is preferable to use a hook member for the third engagement portion 42 and the fourth engagement portion 43.
The third engaging portion 42 and the fourth engaging portion 43 are fixed to the inner and outer surfaces of the support member 45 by a known adhesive, thermal, or ultrasonic bond.

  As shown in FIG. 8, when the support member 45a is folded over the support member 45b around the fixing portion 46, the third engagement portion 42 on the inner surface of the support member 45a and the fourth engagement portion on the inner surface of the support member 45b. 43 is attached at a position that does not overlap each other.

  Since the third engaging part 42 and the fourth engaging part 43 are attached at positions where they do not overlap each other, when the front body F and the back body B of the exterior sheet 20 are connected, both sides of the front body F 4th engaging part 43, the 1st engaging part 40, and the 2nd engaging part 41 overlap from the outer surface side toward the inner surface, and the width direction outer side of the both sides of the front body F In the position, the first engaging portion 40, the second engaging portion 41, and the third engaging portion 42 overlap from the outer surface side to the inner surface, and the connecting portions 21 and 22 of the front and rear bodies F and B of the exterior sheet 20. Does not become excessively hard and has the flexibility to bend freely in the width direction. Therefore, when a wearer pulls up disposable diaper 1 to a crotch part, even if it is a case where connecting parts 21 and 22 rub against a wearer's thigh, an injury is not added to a wearer's skin.

  Although it differs depending on the size of the disposable diaper 1, in the case of a normal adult disposable diaper 1, the first engaging portion 40 has a rectangular shape with a width of 25 to 60 mm and a length of 170 to 330 mm because it has a required engagement strength. The second engaging portion 41 has a rectangular shape with a width of 25 to 40 mm and a vertical length of 170 to 330 mm. The third engaging portion 42 has a rectangular shape with a width of 10 to 20 mm and a vertical length of 150 to 310 mm. The engaging portion 43 has a rectangular shape with a width of 10 to 20 mm and a length of 150 to 310 mm. In particular, the width and the vertical dimension of the first engaging portion 40 are increased so that the width of the first engaging portion 40 can be expanded and the position of the fourth engaging portion can be adjusted because the wreck opening does not fit, leading to leakage. It is preferable to do.

  The engagement strength refers to the engagement in the state where the first engagement portion 40 and the fourth engagement portion 43 on one side of the disposable diaper 1 are engaged with the second engagement portion 41 and the third engagement portion 42. One side of the disposable diaper 1 that is not yet pulled is pulled in the width direction, and the first engagement part 40, the fourth engagement part 43, the second engagement part 41, and the third engagement part 42 on the other side of the disposable diaper 1 are engaged. When combined, the strong against the shearing force acting on the engaging surfaces of the first engaging part 40 and the fourth engaging part 43 and the second engaging part 41 and the third engaging part 42 on one side of the disposable diaper 1 Say it.

Although it differs depending on the size of the disposable diaper 1, in the case of a normal adult disposable diaper 1, the shear stress between the first engaging portion 40 and the fourth engaging portion 43 is 5 N / cm ² or more, and the engaging strength is It is preferable that it is 60N or more.
This is because when the engagement strength is 60 N or less, there is a possibility that the engagement between the first engagement portion 40 and the fourth engagement portion 43 may be disengaged by the force from the thighs accompanying the wearer's walking, sitting, etc. .

Similarly, the shear stress between the second engagement portion 41 and the third engagement portion 42 is preferably 3.5 N / cm ² or more, and the engagement strength is preferably 48 N or more.
When the engagement strength is 48 or less, there is a possibility that the engagement between the second engagement portion 41 and the third engagement portion 42 may be disengaged by the force from the waist portion accompanying the wearer's walking, sitting, etc. is there.

  In the disposable diaper 1, the same loop member is used for the first engagement portion 40 and the second engagement portion 41, and the same hook member is used for the third engagement portion 42 and the fourth engagement portion 43. However, different loop members and hook members may be used.

  In the disposable diaper 1, loop members are used for the first engagement portion 40 and the second engagement portion 41. However, when sufficient engagement strength can be ensured, the first engagement portion 40, The second engagement portion 41 is directly engaged with the upper nonwoven fabric 20A of the exterior sheet 20 and the fourth engagement portion 43 is engaged with the lower nonwoven fabric 20B of the exterior sheet 20 without attaching a loop member to the engagement portion 41. You can also.

  As shown in FIGS. 13 to 15, when the wearer wears the disposable diaper 1, the first engaging portion 40, the fourth engaging portion 43, the second engaging portion 41, and the third engaging portion 42 are arranged. After engaging and pulling up the disposable diaper 1 to the crotch portion in a state where the front body F and the back body B of the exterior sheet 20 are connected, the first engagement portion 40 and the fourth engagement portion 43 are engaged. Adjust the position to fit the suspension. Further, when the waist portion is excessively compressed or the fit of the waist portion is excessively loose, the engagement position between the second engagement portion 41 and the third engagement portion 42 is adjusted to fit around the waist. .

The disposable diaper 1 can adjust the engagement position of the first engagement portion 40 and the fourth engagement portion 43 in front of the wearer, and the fourth engagement portion 43 is engaged from the outer surface of the first engagement portion 40. Therefore, the wearer or caregiver can easily adjust the fit, and the force from the thighs accompanying the wearer's walking, sitting, etc. acts from the inside to the outside of the disposable diaper 1. However, the connection by the engagement of the first engagement portion 40 and the fourth engagement portion 43 can be maintained.
Even when the wearer's hand touches the side edge of the front body F or the back body B of the outer shape sheet 20 or the clothes are rubbed, the first engagement portion 40 and the fourth engagement portion 43 or the Either one of the second engaging portion 41 and the third engaging portion 42 can be reliably maintained.

(Configuration related to flexibility of exterior sheet 20)
Characteristically, the longitudinal range 33 having the waist elastic member 25 · and the longitudinal range 31 having the curved elastic members 26 · 28 · overlap partially (or all), and this overlap The range 30 includes a plurality of waistline elastic members 25 (for example, about 5 to 10), and at least some of the waistline elastic members 25. It is wider than the mutual distance d2. Further, even outside the overlapping range 30, the waist elastic member 25. Is provided in an intermediate range 32 between the longitudinal range 31 having the curved elastic members 26, 28. And the longitudinal range having the waist elastic member 24. A plurality (for example, about 10 to 16) are provided.

  As described above, while allowing the overlap range 30 between the longitudinal range 33 having the waist elastic member 25 · and the longitudinal range 31 having the curved elastic members 26 ·, 28 · to some extent, the waist elastic member is within that range. By providing a portion having a large interval of 25 ·, the denseness of the elastic members can be suppressed without impairing the fit. As a result, the pleats are not concentrated on the exterior sheet 20 in the overlapping range 30, an unnecessary increase in thickness, the elastic member itself and hardening due to its adhesion are suppressed, and a flexible and comfortable wearing feeling can be obtained. Become.

  In a normal case, the mutual distance d1 between the waist elastic members 25 is preferably about 15 to 50 mm, and the mutual distance d2 between the other waist elastic members 25 is preferably about 10 to 20 mm. Moreover, it is preferable that the longitudinal length of the overlapping range 30 is about 15 to 30% of the total length of the disposable diaper in the unfolded state, and a wide interval portion of the mutual interval d1 of the waist elastic members 25 occupying the overlapping range 30. The ratio of 35 is preferably about 60 to 100% in the ratio of the length in the vertical direction (that is, the sum of the distances d1 / the vertical length of the overlapping range 30). If the overlap range 30 is too narrow, the significance of widening the gap between the waist elastic members 25 becomes thin. If it is too wide, the wide portion 35 of the waist elastic members 25 increases and the fit property decreases. Further, if the proportion of the wide portion 35 having the wide distance d1 between the waist elastic members 25 occupying the overlapping range 30 is too small, improvement in flexibility can be expected, but remarkable improvement becomes difficult.

  Specifically, in the case of the illustrated example, the proportion of the wide portion 35 of the waist elastic member 25 · that occupies the overlapping range 30 is about 40% in the front body F and 100% in the back body B. . As described above, the configuration relating to the improvement in flexibility can be made different between the front body F and the back body B, and can be applied only to either the front body F or the back body B in the exterior sheet 20. (same as below).

(Structural example of interior body)
As shown in FIGS. 1 to 8, the interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 made of a nonwoven fabric or the like and a liquid-impermeable back side sheet 12 made of polyethylene or the like. The excretory fluid that has permeated through the top sheet 11 is absorbed and retained.

  As the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable surface sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid permeable top sheet 11 is wound around the side edge of the absorber 13 and extends to the back side of the absorber 13.

  As the liquid-impermeable back sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13, a liquid-impermeable plastic sheet such as polyethylene or polypropylene is used. Those having wettability are preferably used. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there.

  Absorbent body 13 is a known one, for example, a pulp fiber stack, a filament aggregate such as cellulose acetate, or a non-woven fabric, mixed with a superabsorbent polymer as necessary, fixed, etc. In the example shown in the figure, a shape formed with a substantially rectangular planar shape is used, and the width dimension is a dimension width that does not give the wearer a feeling of goreness by hitting the crotch part. The absorbent body 13 can be packaged with a wrapping sheet 14 having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer. The shape of the absorber 13 may be a rectangular shape as shown in the figure, or may be an hourglass shape (constricted shape) in which the width of the crotch portion is narrower than the back side and the abdominal side.

  It is preferable that solid gather BSs that fit around the legs are formed on both sides of the interior body 10. This three-dimensional gathered BS is formed by the gathered nonwoven fabric 15. As the gathered nonwoven fabric, as shown in FIGS. 4 to 6, a nonwoven fabric made into a double sheet by folding is preferably used, and is wound by the liquid-permeable surface sheet 11. The side edge portion of the absorbent body 13 is further wound up from the upper side thereof and extends to the back surface side of the absorbent body 13 to be bonded. More specifically, the gathered nonwoven fabric 15 has a three-dimensional gather BS forming portion at the middle portion in the longitudinal direction of the disposable diaper 1, and the range from the middle portion in the width direction to the back side of the absorbent body 13 is determined by hot melt adhesive or the like. At the front and rear end portions in the longitudinal direction, the section from the intermediate portion in the width direction to the one side end edge is bonded in a range extending to the back surface side of the absorber 13, and the portion forming the three-dimensional gather BS is the absorber 13 While being folded at the upper surface portion, it is bonded with a hot melt adhesive or the like.

  Inside the gathered nonwoven fabric 15 formed of a double sheet nonwoven fabric, a plurality of thread-like elastic elastic members 16, 16. The thread-like elastic elastic members 16, 16. Are for forming a three-dimensional gather BS by standing up the nonwoven fabric portion protruding from the absorber side edge by elastic elastic force, as shown by a two-dot chain line in FIG. 4 in the product state. It is.

  The liquid-impermeable back side sheet 12 enters the double sheet-like gathered nonwoven fabric 15 and constitutes a leak-proof wall on the lower end side of the three-dimensional gathered BS as shown in FIG. As the liquid-impermeable back side sheet 12, it is desirable to use an opaque sheet so that brown such as defecation and urine does not appear. As the opacification, a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used.

  As the thread-like elastic elastic member 16, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, and the like that are usually used can be used. In order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the tension is 150 to 350%, and the interval is 7.0 mm or less. Instead of the thread-like elastic elastic member, a tape-like elastic elastic member having a certain width may be used.

  In the same manner as the liquid-permeable surface sheet 11, the material fibers constituting the gathered nonwoven fabric 15 are olefin-based, polyester-based, amide-based synthetic fibers such as polyethylene or polypropylene, regenerated fibers such as rayon and cupra, and cotton. Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a nonwoven fabric that suppresses the basis weight and has excellent air permeability. Furthermore, for the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging, and to enhance the touch to the skin (dry feeling), silicon-based, paraffin metal-based, alkylchromic croid-based water repellent, etc. It is desirable to use a water-repellent non-woven fabric coated with.

(Front / rear presser sheet)
As shown in FIGS. 1 and 3, in order to cover the front and rear ends of the interior body 10 attached on the inner surface of the exterior sheet 20 and to prevent leakage from the front and rear edges of the interior body 10, 60 is provided. The illustrated embodiment will be described in more detail. The front presser sheet 50 extends over the entire width direction from the inner surface of the folded portion 20C of the waist side end portion to the position overlapping the front end portion of the interior body 10 in the inner surface of the front body F. The rear presser sheet 60 extends across the entire width direction from the inner surface of the folded portion 20C at the end on the waist side to the position overlapping the rear end of the interior body 10 in the inner surface of the back body B. If a slight non-adhesive portion is provided in the crotch side edges of the front and rear presser sheets 50, 60 over the entire width direction (or only the central portion), not only the adhesive does not stick out, but this portion is removed from the surface sheet. It can be lifted slightly to function as a leak-proof wall.

  When the front and rear presser sheets 50 and 60 are attached as shown in the figure, there is an advantage that the degree of freedom of material selection is increased, but there are also disadvantages such as an increase in materials and manufacturing processes. Therefore, the folded portion 20C formed by folding the exterior sheet 20 on the inner surface of the disposable diaper 1 can be extended to a portion overlapping the absorbent pad 200 to form a portion equivalent to the above-described presser sheets 50 and 60.

(About the non-woven fabric constituting the exterior sheet)
Of the non-woven fabrics constituting the exterior sheet 20, at least the outermost non-woven fabric 20B preferably has a twist degree of 3.8 gf · cm / cm or less. It is desirable to employ the same nonwoven fabric as the outermost nonwoven fabric 20B for all the nonwoven fabrics constituting the exterior sheet 20, that is, the other nonwoven fabrics 20A, 50, 60 that are not located on the outermost side (the same applies hereinafter). As described above, when a nonwoven fabric having a sufficiently low twist is used, the flexibility of the disposable diaper as a whole is remarkably increased. Advantages such as mitigation and ease of putting on and taking off are brought about. If the degree of twist is not sufficiently low, the effect of improving flexibility is not exhibited. Such a twist degree can be achieved, for example, by selecting the type of raw fiber, reducing the fineness, shortening the fiber length, reducing the basis weight or thickness, and the like.

  Further, the ratio MIU / MMD between the average surface friction coefficient and the average deviation in the outermost nonwoven fabric 20B is preferably 20 or more, and more preferably 25 or more. By sufficiently increasing the MIU / MMD ratio, the feel of the exterior sheet surface is improved, so that the suppleness is compensated, and skin troubles such as itching and rash due to rubbing with the skin are further reduced. become. Such an MIU / MMD ratio can be achieved, for example, by reducing the fineness or performing surface processing.

In addition, the outermost nonwoven fabric 20B has a thickness when the basis weight is 10 to 30 g / m ² and the pressure is 0.5 g / cm ² so as not to impair the basic functions (hiding function, strength, etc.) as the exterior sheet 20. It is preferable that T0 is 0.1 to 1.0 mm. A more preferable basis weight is 13 to 22 g / m ² , and a thickness T0 is 0.1 to 0.5 mm.

  Furthermore, in order to compensate for flexibility, the bending resistance of the outermost nonwoven fabric 20B according to JIS-L-1096 (45 degree cantilever method) is preferably 45 mm or less, and more preferably 35 mm or less. Thereby, the reduction of the feeling of tingling and the ease of putting on and taking off become even more preferable. Such bending resistance can be achieved, for example, by selecting the type of raw fiber, changing the ratio, lowering the embossing pressure, reducing the basis weight or thickness, and the like.

  Since the strength tends to decrease when the flexibility is improved, the outermost nonwoven fabric 20B has a tensile strength defined in JIS-P-8113 of 40 to 120 kgf / m in the width direction, particularly 60 to 100 kgf / m, in the front-rear direction. It is preferably 10 to 80 kgf / m, particularly 25 to 60 kgf / m, and the tear strength specified in JIS-P-8116 is preferably 4 to 30 kgf / m, particularly 8 to 25 kgf / m in the front-rear direction. Such tensile strength and tear strength can be achieved, for example, by increasing the degree of entanglement between fibers.

  The compression characteristics of the outermost nonwoven fabric 20B are also closely related to flexibility. Therefore, the compression characteristics of the outermost nonwoven fabric 20B are such that the compression hardness LC is 0.3 to 1.0, particularly 0.5 to 0.9, and the compression work WC is 0.01 to 0.10. The compression resilience RC is preferably 20 to 90%, particularly preferably 25 to 70%. Such compression hardness LC, compression work WC, and compression resilience RC can be achieved, for example, by selecting the type of raw fiber, changing the ratio, reducing the basis weight, and the thickness.

  The outermost nonwoven fabric 20B is not particularly limited with respect to the material, structure, manufacturing method, fineness, fiber length (short fiber, filament), and the like of the raw fiber. For example, the raw fiber can be appropriately selected from olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, natural fibers such as cotton, and the fiber structure is parallel. It can be suitably selected from two-layer type composite fibers such as molds and core-sheath types, multilayer type composite fibers, non-composite fibers, mixed fibers, and split fibers. Furthermore, as a manufacturing method, it can select and use suitably from well-known methods, such as the spunlace method, the spun bond method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the point bond method. Known specifications can be adopted for the fineness and fiber length of the fiber, but the fineness is preferably 0.7 to 3 dtex, particularly 1 to 2.5 dtex.

(Second Embodiment)
Next, a second embodiment in which the third engagement portion 42 and the fourth engagement portion 43 are provided on the support member 45 will be described. In addition, the same code | symbol is attached | subjected to the same member as 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.
As shown in FIGS. 9 and 10, in the second embodiment of the present invention, five third parts are arranged in the longitudinal direction along the fixing portion 46 on the inner side in the width direction of the fixing portion 46 on the inner surface of the support member 45 a. The engaging portion 42a is attached, and six fourth engaging portions 43a extending in the vertical direction along the outer edge in the width direction are attached to the outer side in the width direction of the inner surface of the support member 45b.

The third engaging portion 42a has a rectangular shape with a width of 10 to 20 mm and a vertical length of 18 to 36 mm, which is attached at an interval of 9 to 18 mm in the vertical direction, and the vertical direction of the third engaging portion 42a third from the upper side. Is attached so that the center of is located at the center in the vertical direction of the support member 45a.
The fourth engaging portion 43a is a rectangular shape having a width of 10 to 20 mm and a length of 18 to 36 mm, which is attached at intervals of 9 to 18 mm in the vertical direction, and is the third and fourth fourth engaging portions from the upper side. It is attached so that the center in the vertical direction of 43a is positioned at the center in the vertical direction of the support member 45b.

  In the second embodiment, since the third engagement portion 42a and the fourth engagement portion 43a are attached so that the overlapping length ratio is 50%, the front body F and the back body B of the exterior sheet 20 are provided. When these are connected, they have the flexibility to bend freely in the vertical and width directions. Therefore, when the wearer pulls up the disposable diaper 1 to the crotch part, the disposable diaper 1 can be easily pulled up, and even if the connecting parts 21 and 22 are rubbed against the wearer's thigh, the wearer's There is no trauma to the skin.

  A slit 49 extending from the outer edge of the support member 45b to the fixing portion 46 is formed between the third and fourth fourth engagement portions 43a from the upper portion attached to the inner surface of the support member 45b. ing.

The form of the slit 49 is not limited to the form of the slit 49 that is parallel to the width direction, and can be formed in a form that is inclined from the side edge of the support member 45 b to the upper side or a curved form. It is preferable to extend to the position facing the hip bone of the wearer, particularly the iliac bone.
Note that a perforation may be provided instead of the slit 49. In this case, when the wearer wears the disposable diaper 1, the perforation is broken to form the slit 49.

  When the end point of the slit 49 is formed to extend to a position facing the wearer's iliac, the first engagement portion 40 is formed on the upper and lower portions of the iliac, avoiding the wearer's iliac that is generally recessed. Since the 4th engaging part 43a can be engaged, respectively, the fit property of a waist part periphery and a leg periphery improves, and even if it is a thin wearer, it is excellent in fit property.

(Third embodiment)
Next, a third embodiment in which the third engaging portion 42 and the fourth engaging portion 43 are provided on the support member 45 will be described. In addition, the same code | symbol is attached | subjected to the same member as 1st, 2nd embodiment mentioned above, and the overlapping description is abbreviate | omitted.
As shown in FIGS. 11 and 12, in the third embodiment of the present invention, five third portions in the vertical direction along the fixing portion 46 are provided on the inner side in the width direction of the fixing portion 46 on the inner surface of the support member 45 b. The engaging portion 42a is attached, and six fourth engaging portions 43a extending in the vertical direction along the outer edge in the width direction are attached to the outer side in the width direction of the inner surface of the support member 45b.

The third engagement portion 42b has a rectangular shape with a width of 10 to 20 mm and a length of 14 to 26 mm, which is attached to the length of 16 to 30 mm. The center of the third engagement portion 42b, which is the third from the upper side, in the vertical direction. Is attached so as to be positioned at the center in the longitudinal direction of the support member 45a.
The fourth engaging portion 43b has a rectangular shape having a width of 10 to 20 mm and a length of 14 to 26 mm, and is attached to the length of 16 to 30 mm. The fourth engaging portion 43a is third and fourth from the upper side. It is attached so that the center in the vertical direction is located at the center in the vertical direction of the support member 45b.

  In accordance with the third embodiment, the third engagement portion 42b and the fourth engagement portion 43b are attached so that the overlapping length ratio is 0%. When the body B is connected, it has the flexibility which can be freely bent in the vertical direction and the width direction. Therefore, when the wearer pulls up the disposable diaper 1 to the crotch part, the disposable diaper 1 can be easily pulled up, and even if the connecting parts 21 and 22 are rubbed against the wearer's thigh, the wearer's There is no injury to the skin, and the disposable diaper 1 can be fitted around the waist of the wearer and around the legs.

  A slit 49 extending from the outer edge of the support member 45b to the adhering portion 46 is formed between the third and fourth fourth engaging portions 43b from the upper portion attached to the inner surface of the support member 45b. ing.

The form of the slit 49 is not limited to the form of the slit 49 that is parallel to the width direction, and can be formed in a form that is inclined from the side edge of the support member 45 b to the upper side or a curved form. It is preferable to extend to the position facing the hip bone of the wearer, particularly the iliac bone.
Note that a perforation may be provided instead of the slit 49. In this case, when the wearer wears the disposable diaper 1, the perforation is broken to form the slit 49.

  When the end point of the slit 49 is formed to extend to a position facing the wearer's iliac, the first engagement portion 40 is formed on the upper and lower portions of the iliac, avoiding the wearer's iliac that is generally recessed. Since the 4th engaging part 43b can be engaged, respectively, the fit property of a waist part periphery and a leg periphery improves, and even if it is a thin wearer, it is excellent in fit property.

  The present invention can be used in disposable diapers.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 10 Interior body 11 Liquid-permeable surface sheet 12 Liquid-impermeable back surface sheet 13 Absorber 14 Packaging sheet 15 Gather nonwoven fabric 20 Exterior sheet 21 Connection side part 22 Connection side part 24 Waist part elastic member 25 Waist circumference elastic member 26 Back-side curved elastic member 28 Ventral-side curved elastic member 40 First engaging portion 41 Second engaging portion 42 Third engaging portion 43 Fourth engaging portion 45 Support member 46 Adhering portion 49 Slit (perforation)
50 Front presser sheet 60 Rear presser sheet F Front body B Rear body

Claims (5)

An exterior sheet having a front body and a back body, and an interior body including an absorbent body fixed to the inner surface of the exterior sheet, and the front body and the back body of the exterior sheet are coupled by a coupling means that can be engaged and separated. In a disposable diaper in which a waist opening and a pair of left and right leg openings are formed,
The connecting means includes a first engagement portion extending in the vertical direction along both side edges of the outer surface of the front body, a second engagement portion extending in the vertical direction along both side edges of the inner surface of the front body, and the inner surface of the support member A third engaging portion that extends in the longitudinal direction at the center in the width direction of the first member, and a fourth engaging portion that extends in the longitudinal direction along the outer edge in the width direction of the inner surface of the support member.
The support member is fixed to both side portions of the inner surface of the back body by a fixing portion extending in the longitudinal direction at the center portion in the width direction of the outer surface of the support member,
The third and fourth engaging portions are inwardly centered on the fixing portion, with the portion of the support member positioned on the inner side in the width direction than the fixing portion and the portion of the support member positioned on the outer side in the width direction with respect to the fixing portion. Are provided at positions that do not face each other
The front body and the back body are connected by engaging the first engagement portion and the fourth engagement portion, and engaging the second engagement portion and the third engagement portion ,
A plurality of the third and fourth engaging portions are provided at intervals in the vertical direction, and the vertical overlapping length of the third and fourth engaging portions with respect to the vertical length of the fourth engaging portion. The rate is set at 50% or less,
A disposable diaper characterized by that. A plurality of the third and fourth engaging portions are provided at intervals in the vertical direction, and the vertical overlapping length of the third and fourth engaging portions with respect to the vertical length of the fourth engaging portion. the disposable diaper of claim 1 wherein the rate is provided to 0%. An even number of the fourth engagement portions are provided at intervals in the vertical direction, and are worn from the outer edge in the width direction between the fourth engagement portions and the fourth engagement portions located in the central portion in the vertical direction. The disposable diaper of Claim 1 or 2 provided with the slit extended to the position corresponding to a person's iliac bone. The disposable diaper according to any one of claims 1 to 3 , wherein an elastic member is disposed on the support member and is extendable in the width direction. The disposable diaper according to any one of claims 1 to 4 , wherein the first and second engaging portions are formed of a loop material, and the third and fourth engaging portions are formed of a hook material.

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