JP5773643B2 - Disposable diapers - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention 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 in particular, the front body and the back body are easily engaged, and the engagement is not easily released after the engagement. It relates to a pants-type disposable diaper.

Patent Document 1 describes a disposable diaper in which a hook member is attached to a front body panel side of a rear body panel, and the hook members are engaged and connected along 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.

JP 2005-533529 A JP 2007-504884 A JP 2008-12115 A

  However, the operation of engaging the front and back of the pants-type disposable diaper (hereinafter referred to as “disposable diaper”) is performed in the vicinity of the wearer's thigh, and the left and right leg openings of the disposable diaper After the wearer's left and right feet are inserted, in the process of pulling up the engaged disposable diaper to the crotch, a force is generated that expands from the skin contact surface side of the disposable diaper toward the clothing contact surface side. In some cases, the engaging portion is disengaged.

  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.

  Further, when the front body and the back body are engaged in the vicinity of the thigh of the wearer, the front body and the back body of the disposable diaper are engaged with each other to wrap one leg of the wearer, and then the disposable diaper. When trying to wrap the other leg of the front body and the back body of the other body, because the elastic member placed along the waist direction of the front body and the back body is subjected to stretching stress in the waist direction, Difficult to engage.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a disposable diaper in which the front body and the back body of the disposable diaper are easily engaged and the engagement is not easily disengaged after the engagement.

As the present invention according to claim 1 for solving the above problem,
An exterior sheet having a front body covering the front side of the wearer and a back body covering the rear side;
An interior body including an absorbent body on the skin contact surface of the exterior sheet;
In the disposable diaper in which a waist opening and a pair of left and right leg openings are formed by connecting the front body and the back body of the exterior sheet by connecting means that can be engaged and separated,
The back body has a belt-like portion whose side portion extends toward the wearer's upper body,
The connecting means includes
A first engagement member provided on a clothing contact surface of a side portion of the front body;
A second engagement member provided on the skin contact surface of the side part of the front body;
A third engagement member provided on the clothing contact surface of the side part of the back body;
A fourth engagement member provided on the clothing contact surface of the belt-like portion of the back body,
After folding the belt-like part of the back body to the clothes contact surface of the front body, in a state of further folding back the front end side of the folded belt-like part to the skin contact surface of the front body,
The first engagement member engages with the fourth engagement member on the base side of the belt-shaped portion, the second engagement member engages with the third engagement member, and the second engagement member A disposable diaper is provided in which a fourth engagement member on the distal end side of the strip portion is engaged .

(Function and effect)
According to the first aspect of the present invention, not only the front body and the back body are engaged with the second engagement member and the third engagement member, but also the first engagement member and the fourth engagement member. However, since it is engaged, there is an effect that the engagement becomes stronger and the engagement is not easily released after the engagement.
In particular, among the engagement parts of the front body and the back body, it is possible to cover the engagement part of the upper body side end part and the lower body side end part, which are easily disengaged, with the belt-shaped part, so that the engagement is difficult to disengage. There is.
In addition, as described above, the front body and the back body of the disposable diaper are engaged due to the expansion and contraction stress between the front body and the back body when engaging the front body and back body performed near the thigh of the wearer. There is a problem that it is difficult to do. According to the first aspect of the present invention, during the engagement operation, the wearer has a belt-like portion extending from the back body in his / her hand and pulls it toward the upper body side of the wearer. Since the 3rd engagement member provided in can be moved to a wearer's front side, there exists an effect that it becomes easy to engage.
According to the first aspect of the present invention, in the state where the belt-like portion of the back body is folded, the tip of the belt-like portion is positioned on the skin contact surface of the disposable diaper, and on the clothing contact surface of the disposable diaper. The tip of the strip does not appear.
Therefore, there is an effect that it is possible to prevent the engagement of the tip of the belt-like portion from being detached from the disposable diaper due to the frictional force between the disposable diaper and the clothes generated when the disposable diaper is worn. Moreover, compared with the case where the front-end | tip of this strip | belt-shaped part appears on the clothes contact surface, there exists an effect that the appearance of a disposable diaper can be shown beautifully.

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As the present invention according to claim 2 for solving the above problem,
The disposable diaper according to claim 1 , wherein the engagement member is not provided so as to straddle the folding point when the band-shaped portion is folded .

(Function and effect)
According to the second aspect of the present invention, since the engagement member is not provided so as to straddle the folding point of the band-shaped part, there is an effect that the band-shaped part can be easily folded.

As the present invention according to claim 3 for solving the above problem,
The disposable diaper according to claim 1 or 2 , wherein a folding point at which the belt-like portion of the back body is folded back to the clothing contact surface of the front body is used as the base of the belt-like portion .

(Function and effect)
In the folding of the band-shaped part, when a folding point for folding the band-shaped part of the back body to the clothing contact surface of the front body is provided in addition to the base part of the band-shaped part, a part of the band-shaped part is disposable. It will be in the state which protruded from the edge part of the upper body side of the engaging part of a diaper . Since the protrusion of the band-shaped portion hits the flank of the wearer of the disposable diaper, the wearer feels uncomfortable.
In addition, among the engagement parts of the front body and the back body, the engagement part at the end on the upper body side that is likely to be detached cannot be sealed with the belt-shaped part , so that the engagement is easily disengaged.
According to the third aspect of the present invention, it is possible to prevent the belt-like portion from protruding and to prevent the wearer from feeling uncomfortable. In addition, there is an effect that it is possible to make it difficult to disengage the engaging portions of the front body and the back body.

  As described above, according to the present invention, it is possible to provide a disposable diaper in which the front body and the back body of the disposable diaper are easily engaged and the engagement is not easily disengaged after the engagement.

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 PP sectional drawing of FIG. It is QQ sectional drawing of FIG. It is RR sectional drawing of FIG. It is SS sectional drawing of FIG. It is a figure explaining the wearing procedure of the disposable diaper concerning this invention. It is a figure explaining the wearing procedure of the disposable diaper concerning this invention. It is the figure which wore the disposable diaper concerning this invention. It is an inner surface top view of the disposable diaper of the deployment state of a 2nd embodiment. It is an outer surface top view of the disposable diaper of the deployment state of a 2nd embodiment. It is an inner surface top view of the disposable diaper of the deployment state of a 3rd embodiment. It is an outer surface top view of the disposable diaper of the deployment state of a 3rd embodiment. It is sectional drawing of the position of TT of FIG. 9, and is a figure after folding the strip | belt-shaped part of 1st Embodiment specifically ,. It is sectional drawing of the position applicable to the position of TT of FIG. 9, and is a figure of the process in which the strip | belt-shaped part and 2nd strip | belt-shaped part of 2nd Embodiment are folded specifically. It is sectional drawing of the position of TT of FIG. 9, and is the figure after folding the strip | belt-shaped part and 2nd strip | belt-shaped part of 2nd Embodiment specifically ,. It is sectional drawing of the position of TT of FIG. 9, and is specifically a figure of the process in which the strip | belt-shaped part of 3rd Embodiment is folded. It is sectional drawing of the position of TT of FIG. 9, and is specifically a figure of the process in which the strip | belt-shaped part of 3rd Embodiment is folded. It is sectional drawing of the position of TT of FIG. 9, and is the figure after folding the strip | belt-shaped part of 3rd Embodiment specifically ,.

  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.

(First embodiment)
As shown in FIGS. 1-9, 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. Disposable diaper 1 in which a waist opening and a pair of left and right leg openings are formed by folding at the center in the vertical direction, which is the boundary of B, and connecting both sides thereof by connecting means that can be engaged and separated from each other It becomes.

  As shown in FIGS. 1 and 2, the disposable diaper 1 has a first engagement composed of a loop member extending in the vertical direction on both sides of the clothing contact surface of the front body F substantially parallel to the edge of the side. A member 40 is attached, and a second engagement member 41 made of a loop member extending in the vertical direction is attached to both sides of the skin contact surface of the front body F so as to be substantially parallel to the edge of the side part.

Moreover, the 3rd engagement member 42 which consists of a hook member extended to an up-down direction substantially parallel to the edge of the said side part is attached to the both sides of the clothes contact surface of the back body B. As shown in FIG. Further, the back body B has a belt-like portion 65 whose both side portions extend in the upper body direction of the wearer, and is substantially parallel to the edges of both side portions of the belt-like portion 65 on the clothes contact surface of the belt-like portion. A fourth engagement member 43 extending in the vertical direction is attached.
Unlike the first embodiment, a hook member may be attached to the first and second engaging members 40 and 41, and a loop member may be attached to the third and fourth engaging members 42 and 43.
In the above example, the first engagement member 40, the second engagement member 41, the third engagement member 42, and the fourth engagement member 43 are connected to the edge of the side part of the front body F and the back body B or the belt-like part. However, the present invention is not limited to this, and may be arranged obliquely with a predetermined angle with respect to the edge.
Furthermore, in the above example, one each of the first engagement member 40, the second engagement member 41, the third engagement member 42, and the fourth engagement member 43 are provided, but the present invention is not limited to this. Alternatively, a plurality of first engaging members 40, second engaging members 41, third engaging members 42, and fourth engaging members 43 may be provided. For example, in FIG. 2, only one rectangular fourth engagement member 43 having a long vertical length is provided on the clothes contact surface of the belt-shaped portion 65. A plurality of fourth engaging members 43 having a shape that is slightly shorter in the direction may be provided side by side in the vertical direction.
1 and 2 show an example in which the vertical length of the belt-like portion 65 is the same as the vertical length of the connecting side portion 22, the present invention is not limited to this. Specifically, the length of the belt-like portion 65 in the vertical direction may be shorter than the length of the connecting side portion 22 in the vertical direction.

(Exterior sheet)
As shown in FIGS. 3 to 6, the exterior sheet 20 is a nonwoven fabric sheet having a two-layer structure including an upper layer nonwoven fabric 20 </ b> A and a lower layer nonwoven fabric 20 </ b> B. Various elastic members are arranged between the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B and between the nonwoven fabric 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... Disposed in the vicinity of the waist opening 23 and the front body F and the back body B. And a plurality of waist elastic members 25, 25... Disposed along the width direction, and separately from the waist elastic members 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 but are spaced apart from each other. 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 vicinity of the waist opening edge in the range of the connecting side portions 21, 22 where the front body F and the back body B are connected, and are arranged at intervals in the vertical direction. 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. Further, the waist elastic members 24, 24... Shown in the figure are sandwiched between the nonwoven fabrics of the folded portions 20C of the lower layer nonwoven fabric 20B at the waist, but may be sandwiched between the upper nonwoven fabric 20A and the lower layer nonwoven fabric 20B. good.

  The waist elastic members 25, 25... Are elastic rubber thread-like elastic members arranged along the width direction at intervals in the vertical direction over a 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. The boundary between the waist elastic members 24, 24... And the waist elastic members 25, 25. 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... 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, instead of arranging a few elastic expansion / contraction members at a close interval and substantially as one bundle. 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 a state where the two-sided portions of the interior body overlap with each other, they are arranged along a predetermined curve having a crossing portion 70 having a vertical crossing angle θ of 60 ° or less. 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 also arranged so as to form a predetermined expansion / contraction zone, instead of arranging a few elastic expansion / contraction members at a close interval and substantially as one bundle. 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, 25... And the curved elastic members 26, 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, 25... And the curved elastic members 26, 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, 25... And the curved elastic members 26, 28... Can be continuously arranged 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 ... 28 on the interior body 10 and to make it discontinuous, 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, 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 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 also be adopted, the curved elastic member 28 arranged on the front body F side as shown in the illustrated example. And the group of curved elastic members 26 arranged on the back body B side are separated 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 and 2, the connecting side portions 21 on both sides of the front body F of the exterior sheet 20 are substantially parallel to the edges of the side portions on both sides of the clothing contact surface of the front body F. A first engagement member 40 made of a loop member extending in the vertical direction is attached, and a second loop made of a loop member extending in the vertical direction on both sides of the skin contact surface of the front body F substantially parallel to the edge of the side portion. An engagement member 41 is attached.

Both the loop member and the hook member can be used for the first engagement member 40 and the second engagement member 41, but the second engagement member 41 is the front body F that contacts the skin side of the wearer. Since it is attached to the skin contact surface, it is preferable to use a loop member for the second engagement member 41 from the viewpoint of preventing the wearer's skin from being damaged.
Moreover, in order to prevent peeling of the upper nonwoven fabric 20A and the second engagement member 41 of the exterior sheet 20 and the lower nonwoven fabric 20B of the exterior sheet 20 and the first engagement member 40, the first engagement member 40 and the second engagement It is preferable not to arrange the waist elastic members 24, 24, waist elastic members 25, 25, ventral curved elastic members 28, 28 on the connecting side portion 21 of the exterior sheet 20 to which the member 41 is attached. It is.
The first engagement member 40 and the second engagement member 41 are fixed to the upper nonwoven fabric 20A and the lower nonwoven fabric 20B of the exterior sheet 20 by a known adhesive, thermal, or ultrasonic bond, respectively.

As shown in FIGS. 1 and 2, hooks extending in the vertical direction on the garment contact surface of the exterior sheet 20 and substantially parallel to the edges of the side portions are provided on the connecting side portions 22 on both sides of the back body B. A third engaging member 42 made of a member is attached.
Further, the side part of the back body B has a belt-like portion 65 extending in the upper body direction of the wearer, and a fourth engagement member 43 is attached to the clothes contact surface of the belt-like portion 65. The fourth engagement member 43 is formed of a hook member that extends in the vertical direction substantially parallel to the edge of the belt-like portion 65.

In addition, although either a loop member or a hook member can be used for the 3rd engagement member 42 and the 4th engagement member 43, it is suitable to use a loop member for the 2nd engagement member 41 as mentioned above. Therefore, it is preferable to use a hook member for the third engagement member 42 engaged therewith.
Furthermore, in order to prevent peeling of the upper nonwoven fabric 20A of the exterior sheet 20 and the third engagement member 42, and the strip 65 and the fourth engagement member 43, the connection side of the exterior sheet 20 to which the third engagement member 42 is attached. It is preferable that the waist portion elastic members 24, 24..., The waist elastic members 25, 25... And the ventral curved elastic members 28, 28.
The third engagement member 42 and the fourth engagement member 43 are fixed to the inner and outer surfaces of the support member 45 by a known adhesive, thermal, or ultrasonic bond.

It should be noted that it is more preferable not to provide the waist elastic member 24 or the waist elastic member 25 between the upper nonwoven fabric 20A and the lower nonwoven fabric 20B at the portion of the side part of the back body B that is fixed to the third engaging member 42. is there. This is because if the waist elastic member 24 and the waist elastic member 25 are provided, the non-woven fabric and the third engagement member 42 are bent by the elastic action, and the fixation is not successful. It is more preferable to provide the waist elastic member 24 and the waist elastic member 25 for the portions that are not fixed. This is because the fit of the disposable diaper 1 is improved by the elastic action.
The belt-like portion 65 is preferably made of a 40 to 100 g / m ² non-woven fabric.
Moreover, you may comprise the strip | belt-shaped part 65 so that it may consist of 20 A of upper layer nonwoven fabrics, and the lower layer nonwoven fabric 20B. In this case, it is more preferable that the waist elastic member 24 and the waist elastic member 25 are not provided between the upper nonwoven fabric 20A and the lower nonwoven fabric 20B at the location where the belt-like portion 65 and the fourth engaging member 43 are fixed. This is because if the waist elastic member 24 and the waist elastic member 25 are provided, the non-woven fabric and the third engagement member 42 are bent by the elastic action, and the fixation is not successful. It is more preferable to provide the waist elastic member 24 and the waist elastic member 25 for the portions that are not fixed. This is because the fit of the disposable diaper 1 is improved by the elastic action.
As an example of the other strip-shaped portion 65, a stretchable nonwoven fabric that stretches in the width direction is used. The stretchable nonwoven fabric includes one in which an elastic member is disposed between the nonwoven fabrics and one in which a stretchable film is disposed. By the said elastic action, the effect that the fitting property of the disposable diaper 1 improves can be acquired. Even in this case, it is preferable that the portion where the belt-like portion 65 and the fourth engagement member 43 are fixed is a separate member having no stretchability.

  As shown in FIGS. 1 and 2, when the folded portion 64 at the base of the belt-shaped portion 65 is folded, the third engagement member 42 and the fourth engagement member 43 are attached at positions that do not overlap each other. .

  Since the third engagement member 42 and the fourth engagement member 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 The first engagement member 40, the second engagement member 41, and the third engagement member 42 are overlapped from the clothing contact surface side toward the skin contact surface side at the inner position in the waistline direction of the front portion. In the outer circumference direction position on both sides of F, the fourth engagement member 43, the first engagement member 40, and the second engagement member 41 overlap from the clothing contact surface side to the skin contact surface side, The connecting portions 21 and 22 of the front and rear bodies F and B of the exterior sheet 20 are not excessively hard and have flexibility that can be freely bent 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 member 40 has a rectangular shape with a width of 25 to 60 mm and a length of 170 to 330 mm in order to have a required engagement strength. The second engagement member 41 has a rectangular shape with a width of 25 to 40 mm and a vertical length of 170 to 330 mm. The third engagement member 42 has a rectangular shape with a width of 10 to 20 mm and a vertical length of 150 to 310 mm. The engaging member 43 has a rectangular shape with a width of 10 to 20 mm and a length of 150 to 310 mm. In particular, if the wreck opening does not fit, it will lead to leakage, so that the width of the first engagement member 40 can be increased and the position of the fourth engagement member can be adjusted so that the width and vertical dimension of the first engagement member 40 are increased. It is preferable to do.

  The engagement strength refers to the engagement in a state where the first engagement member 40 and the fourth engagement member 43 on one side of the disposable diaper 1 are engaged with the second engagement member 41 and the third engagement member 42. One side of the disposable diaper 1 that is not yet pulled is pulled around the waist, and the first engagement member 40, the fourth engagement member 43, the second engagement member 41, and the third engagement member 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 member 40 and the fourth engaging member 43 and the second engaging member 41 and the third engaging member 42 on one side of the disposable diaper 1. Say it.

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 engagement member 40 and the fourth engagement member 43 is 5 N / cm ² or more, and the engagement strength is It is preferable that it is 60N or more.
When the engagement strength is 60 N or less, there is a possibility that the first engagement member 40 and the fourth engagement portion 4 3 are disengaged by a force from the crotch accompanying the wearer's walking, sitting, etc. It is.

Similarly, the shear stress between the second engagement member 41 and the third engagement member 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 member 41 and the third engagement member 42 may be disengaged due to the force from the waist when the wearer walks or sits. is there.

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

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

When the wearer wears the disposable diaper 1, first, the second engagement member 41 and the third engagement member 42 are engaged as shown in FIG. Then, as shown in FIG. 8, the folded portion 64 at the base of the band-shaped portion 65 is folded back toward the clothing contact surface of the front body F, and the first engaging member 40 and the fourth engaging member 43 are engaged.
In the state where the front body F and the back body B of the exterior sheet 20 are connected, after the disposable diaper 1 is pulled up to the crotch portion, the engagement position between the first engagement member 40 and the fourth engagement member 43 is adjusted. Fit around the undercarriage.
FIG. 9 is a drawing after the disposable diaper 1 is mounted. 9 represents the position of the cut portion of the cross-sectional views of FIGS. 14 to 19. FIG. 9 shows a case where the disposable diaper 1 of the first embodiment is mounted. However, in the description of FIGS. 15 and 16, it is assumed that the disposable diaper 1 of the second embodiment is mounted. In the description from FIG. 17 to FIG. 19, it is assumed that the disposable diaper 1 of the third embodiment is attached, and the position of TT is captured.
14 is a cross-sectional view taken along the line TT in FIG. After the mounting, the engagement portion of the upper body side end portion of the front body F that is easily detached is covered with the belt-shaped portion 65.

In the above example, after engaging both sides of the second engagement member 41 provided on both sides of the front body F and the third engagement member 42 provided on both sides of the back body B, the front body F The case where both sides of the first engagement member 40 provided on both sides and the fourth engagement member 43 provided on both sides of the back body B is performed has been described.
The present invention is not limited to this. First, the engagement of one side of the second engagement member 41 provided on both sides of the front body F and the third engagement member 42 provided on both sides of the back body B is described. After the combination, the one side engagement of the first engagement member 40 provided on both sides of the front body F and the fourth engagement member 43 provided on both sides of the back body B is performed. Then, after engaging the other side of the 2nd engagement member 41 provided in the both sides of the front body F, and the 3rd engagement member 42 provided in the both sides of the back body B, both sides of the front body F are performed. You may make it engage the other side of the 4th engagement member 43 provided in the both sides of the 1st engagement member 40 and the back body B provided in the part.

The disposable diaper 1 can adjust the engagement position of the first engagement member 40 and the fourth engagement member 43 on the front side of the wearer, and the fourth engagement member 43 is engaged from the outer surface of the first engagement member 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 In addition, the connection by the engagement between the first engagement member 40 and the fourth engagement member 43 can be maintained.
Even if 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 member 40 and the fourth engagement member 43 or the The connection of any one of the 2 engaging member 41 and the 3rd engaging member 42 can be maintained reliably.

  Moreover, as shown in FIG. 14, since the engagement part of the edge part of the upper body side which is easy to disengage among the engagement parts of the front body F and the back body B can be covered with the band-shaped part 65, the engagement is disengaged. There is an effect of becoming difficult.

When the folded portion 64 is provided at a place other than the base portion of the strip-shaped portion 65 in the folded state of the strip-shaped portion 65, a part of the strip-shaped portion 65 is the upper body side end of the front body F of the disposable diaper 1 in the folded state. It will be in the state which protruded from the part. Since the protrusion of the strip-shaped portion 65 hits the flank of the wearer of the disposable diaper 1, the wearer feels uncomfortable. In addition, among the engagement parts of the front body F and the back body B, the engagement part at the end on the upper body side that is easily disengaged cannot be sealed with the belt-shaped part 65, so that the engagement is easily disengaged.
According to the present invention, it is possible to prevent the belt-like portion 65 from protruding and to prevent the wearer from feeling uncomfortable. In addition, there is an effect that it is possible to make it difficult to disengage the engaging portion between the front body F and the back body B.

(Configuration related to flexibility of exterior sheet 20)
Characteristically, the longitudinal range 33 having the waist elastic members 25... And the longitudinal range 31 having the curved elastic members 26..., 28. A plurality of waistline elastic members 25 (for example, about 5 to 10) are included in the range 30, and at least some of the waistline elastic members 25 have a mutual distance d1 between the other waistline elastic members 25. It is wider than the mutual distance d2. Further, even outside the overlapping range 30, the waistline elastic members 25... Are 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, the waist elastic member within the range is allowed to some extent while allowing an overlap range 30 between the longitudinal range 33 having the waist elastic members 25... And the longitudinal range 31 having the curved elastic members 26. By providing the portions 25 with a wide interval, it is possible to suppress the denseness of the elastic members 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 spacing d1 of the waist elastic members 25 is preferably about 15 to 50 mm, and the mutual distance d2 of 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 1 in the unfolded state, and a wide interval d1 between the waist elastic members 25 occupying the overlapping range 30. The ratio of the portion 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 overlapping range 30 is too narrow, the significance of widening the interval between the waist elastic members 25 becomes thin. If it is too wide, the wide portion 35 of the waist elastic members 25 increases, resulting in a decrease in fit. Further, if the proportion of the wide portion 35 having the mutual interval d1 of the waist elastic members 25... Occupying within 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 ratio of the wide portion 35 having the mutual interval d1 of the waist elastic members 25 to 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)
The interior body 10 has a structure in which an absorber 13 is 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. 11 is used to absorb and retain the excretory fluid that has passed through 11.

  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) where 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 raising 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. Moreover, in order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the elongation is 150 to 350%, and the interval is 7.0 mm or less. The stretch rate is a value calculated by the length at stretch / natural length × 100, and instead of the thread-like elastic stretchable member, a tape-like elastic stretchable 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 skin contact surface of the exterior sheet 20 and to prevent leakage from the front and rear edges of the interior body 10, Sheets 50 and 60 are 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 also 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 significantly increased. Advantages such as mitigation and ease of wearing 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 member 42 and the fourth engagement member 43 are provided in different arrangements 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. 10 and 11, a second belt-like portion 66 extending from both sides of the back body B toward the lower half is provided. A fourth engagement member 43 is provided on the garment contact surface of the belt-like portion so as to be substantially parallel to the edge of the second belt-like portion 66.

Moreover, the length of the strip | belt-shaped part 65 in the up-down direction is shorter than that of 1st Embodiment.
The length obtained by adding the vertical length of the belt-like portion 65 of the second embodiment and the vertical length of the second belt-like portion 66 is the same as or the length of the belt-like portion 65 of the first embodiment in the vertical direction. It is preferable to make it shorter. Even if the length of the belt-like portion 65 of the first embodiment is shorter than the length in the vertical direction, the engagement portion of the end portion on the upper body side that is easily detached is covered with the belt-like portion 65 and the end portion on the lower body side that is easily detached is engaged. This is because the portion can be covered with the second belt-like portion 66.

When the wearer wears the disposable diaper 1 of the second embodiment, first, the second engagement member 41 and the third engagement member 42 are engaged as shown in FIG. Then, as shown in FIGS. 15 and 16, the folded portion 64 at the base of the band-shaped portion 65 is folded back toward the wearer's front side, and the first engaging member 40 and the fourth engaging member 43 are engaged. Then, the folding | returning part 64 in the base of the 2nd strip | belt-shaped part 66 is folded toward the wearer's front side, and the 1st engagement member 40 and the 4th engagement member 43 are also engaged.
As described above, after the disposable diaper 1 is pulled up 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 engagement between the first engagement member 40 and the fourth engagement member 43 is performed. Adjust the joint position to fit the suspension.

  Unlike the above example, after the second engagement member 41 and the third engagement member 42 are engaged, the engagement of the fourth engagement member 43 provided on the second strip 66 and the first engagement portion is performed. Then, the fourth engagement member 43 provided in the belt-like portion 65 and the first engagement portion may be engaged thereafter.

  Of the engaging parts of the front body F and the back body B, the end of the lower body side is easily disengaged, but the engaging part of the end is covered with a second belt-like part 66 extending from the back body B. Thus, there is an effect that the engagement is difficult to be disengaged.

(Third embodiment)
Next, a third embodiment in which the third engagement member 42 and the fourth engagement member 43 are provided in different arrangements 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. 12 and 13, the length in the vertical direction of both side portions of the back body B on which the third engagement member 42 is provided is shorter than that of the first embodiment or the second embodiment. Specifically, the vertical length of both side portions of the rear body B where the third engagement member 42 is provided is shorter than the length of the connecting side portion 21 of the front body F.
Further, the length of the belt-like portion 65 in the vertical direction is longer than that of the first embodiment. Specifically, the length of the strip portion 65 in the vertical direction is longer than the length of the connecting side portion 21 of the front body F.
One belt-like portion 65 is provided with two folded portions 64. One folded portion 64 is provided at the base of the belt-like portion 65.
Another folded portion 64 is provided in the middle of the strip-shaped portion 65. More specifically, the distance between the folded portion 64 provided at the base of the belt-like portion 65 and the folded portion 64 provided in the middle of the belt-like portion 65 is the same as the length of the connecting side portion 21 of the front body F in the vertical direction. Or more.

And the 4th engaging member 43 is provided in each place of the lower body side and the upper body side by making the said folding | returning part 64 provided in the middle of the said belt | band | zone upper part 65 into a boundary.
Further, third engagement members 42 are provided on both sides of the back body B.

When the wearer wears the disposable diaper 1 of the third embodiment, first, the second engagement member 41 and the third engagement member 42 are engaged as shown in FIG. Then, as shown in FIGS. 17 and 18, the folded portion 64 at the base of the belt-shaped portion 65 is folded back toward the wearer's front side to engage the first engaging member 40 and the fourth engaging member 43. Then, as shown in FIG. 18 and FIG. 19, with the folded portion 64 in the middle of the folded strip 65 as a starting point, the tip of the strip 65 is further folded back to the skin contact surface of the front body F, The engagement member 41 and the fourth engagement member 43 are engaged.
As described above, after the disposable diaper 1 is pulled up 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 engagement between the first engagement member 40 and the fourth engagement member 43 is performed. Adjust the joint position to fit the suspension.

According to the third embodiment, among the engaging portions of the front body F and the back body B, the upper portion on the upper body side and the engaging portion on the lower body side that are easily disengaged can be covered with the belt-shaped portion 65. There is an effect that it becomes difficult to disengage.
Further, in a state where the belt-like portion 65 of the back body B is folded back, the tip of the belt-like portion 65 is positioned on the skin contact surface of the disposable diaper 1, and the clothes contact surface of the disposable diaper 1 The tip does not appear.
Therefore, there is an effect that it is possible to prevent the engagement of the front end of the belt-like portion 65 from being detached from the disposable diaper 1 due to the frictional force between the disposable diaper 1 and clothes generated when the disposable diaper 1 is worn. Moreover, compared with the case where the front-end | tip of this strip | belt-shaped part 65 appears on the clothes contact surface, there exists an effect that the appearance of the disposable diaper 1 can be shown beautifully.

  In the first embodiment, the second embodiment, and the third embodiment, it is preferable not to provide an engaging member so as to straddle the folded portion 64 in order to facilitate folding of the folded portion 64.

  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 dorsal curved elastic member 28 ventral curved elastic member 40 first engaging member 41 second engaging member 42 third engaging member 43 fourth engaging member 49 slit (perforation)
50 Front presser sheet 60 Rear presser sheet 64 Folded part 65 Band-shaped part 66 Second band-shaped part F Front body B Rear body

Claims (3)

An exterior sheet having a front body covering the front side of the wearer and a back body covering the rear side;
An interior body including an absorbent body on the skin contact surface of the exterior sheet;
In the disposable diaper in which a waist opening and a pair of left and right leg openings are formed by connecting the front body and the back body of the exterior sheet by connecting means that can be engaged and separated,
The back body has a belt-like portion whose side portion extends toward the wearer's upper body,
The connecting means includes
A first engagement member provided on a clothing contact surface of a side portion of the front body;
A second engagement member provided on the skin contact surface of the side part of the front body;
A third engagement member provided on the clothing contact surface of the side part of the back body;
A fourth engagement member provided on the clothing contact surface of the belt-like portion of the back body,
After folding the belt-like part of the back body to the clothes contact surface of the front body, in a state of further folding back the front end side of the folded belt-like part to the skin contact surface of the front body,
The first engagement member engages with the fourth engagement member on the base side of the belt-shaped portion, the second engagement member engages with the third engagement member, and the second engagement member A disposable diaper characterized in that a fourth engagement member on the distal end side of the belt-like portion is engaged. The disposable diaper according to claim 1 , wherein the engagement member is not provided so as to straddle the folding point when the band-shaped portion is folded . The disposable diaper according to claim 1 or 2 , wherein a folding point at which the belt-like portion of the back body is folded back to the clothing contact surface of the front body is used as the base of the belt-like portion .

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