JP5584056B2 - 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.
In Patent Document 2, 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 and 2 reduce the burden on the wearer or caregiver because the wearer can wear 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 3 and 4 include means for preventing disengagement of the engaging portion that removably connects the front and rear side edges of the disposable diaper using a fastening element having high shear engagement strength. It is disclosed.

JP 2005-533529 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 a connecting means capable of engaging and separating the front body and the back body of the exterior sheet By being connected, 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 at least both side edges of the outer surface of the front body, and a second engagement portion extending in the vertical direction along both side edges of the upper side of the inner surface of the front body. A third engagement portion extending in the vertical direction along both side edges of the upper portion of the outer surface of the rear body, and a fourth engagement portion extending in the vertical direction along both side edges of the lower side portion of the inner surface of the rear body Is installed and
Between the third engagement part and the fourth engagement part on both sides of the back body, a slit is formed inward in the width direction, respectively.
When the exterior sheet is connected, the first engagement portion and the fourth engagement portion are engaged, and the second engagement portion and the third engagement portion are engaged, whereby the front body and The back body is connected ,
Before wearing, and the second engaging portion and the third engaging portion that are engaged,
A disposable diaper characterized by that.

(Function and effect)
According to the invention of claim 1, between the third engagement portion and the fourth engagement portion on both side portions of the back body, slits are formed inward in the width direction, respectively, and when the exterior sheet is connected, Since the first engagement portion and the fourth engagement portion are engaged at the upper portion of the wearer's waistline portion, and the second engagement portion and the third engagement portion are engaged at the upper portion of the waistline portion, The engagement positions of the upper and lower portions of the waistline portion can be arbitrarily adjusted according to the wearer's body.
Therefore, the wearer can easily lift the disposable diaper to the crotch part, and then adjust the engagement position of the second engagement part and the third engagement part to improve the fit of the upper part of the waistline including the waist part. By adjusting the engagement position between the first engagement part and the fourth engagement part, it is possible to easily adjust the fit of the lower part of the waistline part including the suspension part, and to ensure external leakage of urine, body fluid, etc. Can be prevented.
Further, since the third engagement portion is engaged with the second engagement portion on the inner surface of the front body and the fourth engagement portion is engaged with the first engagement portion on the outer surface of the front body, the wearer's activity Thus, even when a vertical force is applied from the inner surface to the outer surface direction, any one of the engaging portions is maintained in the engaged state, and the connection between the front body and the back body of the exterior sheet is reliably maintained.
Furthermore, since the second engaging portion and the third engaging portion are engaged before wearing, if the wearer or caregiver engages any part of the front body and the back body before wearing Whether it is good or not can be easily confirmed, and disposable diapers can be easily attached.

<Invention of Claim 2>
The disposable diaper according to claim 1, 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 second 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.

<Invention of Claim 3>
Support members are provided on both sides of the back body, the third engagement portion is attached along the upper side edge of the outer surface of the support member, and the fourth engagement portion is below the inner surface of the support member. Installed along the side edges,
The disposable diaper according to claim 1 or 2, wherein the slit is formed inward in the width direction between the third engagement portion and the fourth engagement portion of the support member.

(Function and effect)
According to the invention described in claim 3, since the support members are provided on both side portions of the back body, the third and fourth engaging portions are securely attached without being affected by the shrinkage of the exterior sheet by the elastic member. The slit can be easily formed.

<Invention of Claim 4>
The support member is folded into a Z shape and forms a lower piece, an intermediate piece, an upper piece in order from the back body side toward the inner surface direction,
The third engagement portion is attached to the outer surface of the upper portion of the upper piece, and the fourth engagement portion is attached to the inner surface of the lower portion of the upper piece,
Wherein said lower piece intermediate piece, the intermediate piece and the upper piece and the disposable diaper according to claim 3, characterized in that the temporarily fixed, respectively.

(Function and effect)
According to the fourth aspect of the present invention, since the lower piece and the intermediate piece of the support member, and the intermediate piece and the upper piece are respectively temporarily fixed , the lower piece, the intermediate piece, and the upper piece of the support member can be easily attached. Can be deployed.

<Invention of Claim 5>
The disposable diaper according to claim 3 or 4, wherein an elastic member is disposed on the support member so that the support member can extend in the width direction.

(Function and effect)
According to the fifth aspect of the present invention, since the elastic member is disposed on the support member and is extendable 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 6>
The disposable diaper according to any one of claims 1 to 5, wherein an end point on the inner side in the width direction of the slit is formed at a position facing the wearer's hipbone.

(Function and effect)
According to the invention described in claim 6, since the end point on the inner side in the width direction of the slit is formed at a position facing the hip bone of the wearer, the fit around the waist portion is improved with the hip bone of the wearer as a starting point. Even a slender wearer has excellent fit.

  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 inner surface top view of a disposable diaper in the state where a support member was folded up into Z shape. 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 EE sectional drawing of FIG. It is FF sectional drawing of FIG. It is a perspective view of the front body side of a disposable diaper. It is a perspective view of the back body side of a disposable diaper. It is a perspective view of the wearing state of a disposable diaper.

An embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, “inner surface” refers to the mounting surface side of the disposable diaper, and “outer surface” refers to the side surface opposite to the mounting surface side of the disposable diaper.
Further, the “upper side portion” refers to a portion on the waist opening side, and the “lower side portion” refers to a portion on the leg opening portion side.

  As shown in FIGS. 1-9, the disposable diaper 1 has the exterior sheet 20 which has the front body F and the back body B, and the interior body 10 fixed to the inner surface of this exterior sheet 20, 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. It becomes a disposable diaper.

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 sides of the outer surface of the front body F, and both upper side edges are attached to both sides of the inner surface of the front body F. The 2nd engaging part 41 which consists of a loop member extended in the vertical direction along is attached.
Further, support members 45 are provided on both side portions of the back body B, and third engaging portions 42 made of hook members extending in the vertical direction along the upper side edges are attached to the side portions of the outer surface of the support member 45. A fourth engagement portion 43 made of a hook member extending in the vertical direction along the lower side edge is attached to the side of the inner surface of the support member 45.
Unlike this 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, as shown in FIGS. 10 to 12, the first engagement part 40 of the front body F and the fourth engagement part 43 of the back body B are engaged, and the front body F By engaging the second engaging portion 41 and the third engaging portion 42 of the back body B, both side portions of the front body F and the back body B are connected.

(Exterior sheet)
As shown in FIGS. 1-9, 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 to 3, 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 to 9, a first engaging portion 40 that extends in the longitudinal direction along both side edges on the outer surface of the front body F is formed on the connecting side portions 21 on both sides of the front body F of the exterior sheet 20. A second engaging portion 41 is attached to the inner surface of the front body F and extends in the longitudinal direction along both side edges of the upper portion.
In addition, unlike the embodiment, the first engagement portion 40 may be configured to extend in the vertical direction along the both side edges of the lower portion on the outer 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, and in particular, the second engaging portion 41 is the front body F that contacts the wearer's ventral side. Since it is attached to the inner surface, it is preferable to use loop members for the first engagement portion 40 and the second engagement portion 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 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.

  Support members 45 extending in the width direction are fixed to the upper side nonwoven fabric 20A of the exterior sheet 20 by thermal bonding on the connecting side portions 22 on both sides of the back body B of the exterior sheet 20.

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 entire support member 45 can be made of a stretchable nonwoven fabric, it is fixed to the upper piece 48 of the support member 45 to which the fourth engagement portion 43 is attached and to the side portion of the upper nonwoven fabric 20A of the exterior sheet 20. It is preferable to use a stretchable nonwoven fabric that expands and contracts in the width direction for the lower piece 46 and the intermediate piece 47 between the lower piece 46 of the support member 45 and the widthwise inner end.
When adjusting the engagement position between the first engagement part 40 and the fourth engagement part 43 on the outer surface of the front body F, the fourth engagement part 43 is extended to an appropriate position, and the disposable diaper 1 is provided to the wearer. The disposable diaper 1 can be fitted around the wearer's legs.
The stretchable nonwoven fabric acts as a drag force against the vertical force caused by the thighs, disperses the vertical force, and prevents the front body F and the back body B of the exterior sheet 20 from peeling off.

  A third engagement portion 42 extending in the vertical direction along both side edges of the upper portion is attached to the outer surface of the support member 45, and a fourth engagement portion extending in the vertical direction along both side edges of the lower portion on the inner surface of the support member 45. 43 is attached.

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. A loop member is preferably used for the joining portion 40 and the second engaging portion 41, and a hook member is preferably used for the third engaging portion 42 and the fourth engaging 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.

In the support member 45, a slit 49 extending from the side edge of the upper piece 48 of the support member 45 to the intermediate piece 47 is formed between the third engagement portion 42 and the fourth engagement portion 43. 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.
The shape of the slit 49 is not limited to the shape of the slit 49 parallel to the width direction, as shown in FIGS. It may be formed in a curved shape, and it is preferable that the end point of the slit 49 extends beyond the intermediate piece 47 to the lower piece 46 facing the wearer's hip bone, particularly the iliac bone.

By forming the slit 49 in the support member 45, the fourth engagement portion 43 engages with the first engagement portion 40 (the outer surface of the front body F) when the front body F and the back body B of the exterior sheet 20 are connected. The third engagement portion 42 is engaged with the second engagement portion 41 (the inner surface of the front body F), and the respective engagement surfaces are engaged with the opposite surface side of the front body F of the exterior sheet 20. Even when a vertical force is applied from the inner surface to the outer surface due to the wearer's activity, one of the engaging portions remains engaged, and the connection between the front body F and the rear body B of the exterior sheet 20 is performed. It can be reliably maintained.
Moreover, when engaging the 4th engaging part 43 with the 1st engaging part 40, the slit 49 of the supporting member 45 pinches | interposes the side part of the front body F, respectively, and an outer surface direction is carried out by a wearer's activity. It acts as a resistance against the normal force to the surface, disperses the normal force, and prevents the front body F and the back body B of the exterior sheet 20 from peeling off.
Further, when the end point of the slit 49 is formed between the intermediate piece 47 facing the wearer's hipbone and the lower piece 46, the fitability around the waist is improved with the wearer's hipbone as the starting point. To do.

  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 part 40 has a rectangular shape with a width of 25 to 60 mm and a length of 100 to 240 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 100 to 120 mm. The third engaging portion 42 has a rectangular shape with a width of 10 to 20 mm and a vertical length of 90 to 110 mm. The engaging portion 43 has a rectangular shape with a width of 10 to 20 mm and a length of 90 to 110 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 N 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.

  Moreover, in the disposable diaper 1, although the loop member is used for the 1st engaging part 40 and the 2nd engaging part 41, when sufficient engagement strength can be ensured, the 1st engaging part 40 is used. Without directly attaching a loop member to the second engagement portion 41, the third engagement portion 42 is directly engaged with the upper layer nonwoven fabric 20A of the exterior sheet 20, and the fourth engagement portion 43 is directly engaged with the lower layer nonwoven fabric 20B of the exterior sheet 20. It can also be made.

  As shown in FIGS. 2, 8, and 9, the support member 45 of the disposable diaper 1 before being mounted is folded into a Z shape, and the second engagement portion 41 and the third engagement portion 42 are engaged and temporarily fixed. Has been.

The support member 45 folded in a Z shape has a lower piece 46, an intermediate piece 47, and an upper piece 48 that are continuous with each other in order from the inner surface of the rear body B of the exterior sheet 20 toward the inner surface. The inner surfaces which are folded in the middle in the direction and face each other are detachably bonded and temporarily fixed by a known adhesive, thermal or ultrasonic bond.
Similarly, the outer surface of the lower piece 46 and the outer surface of the intermediate piece 47 opposed to the outer surface of the lower piece 46 are detachably bonded and temporarily fixed by a known adhesive, thermal or ultrasonic bond.
Similarly, the inner surface of the intermediate piece 47 and the inner surface of the upper piece 48 opposed to the inner surface of the intermediate piece 47 are detachably bonded and temporarily fixed by a known adhesive, thermal or ultrasonic bond.

  Since the support member 45 is folded into a Z shape and the second engagement portion 41 and the third engagement portion 42 are engaged and temporarily fixed, the user or caregiver can attach the front body and the back body before wearing. Since it is possible to separate the engaging portion after confirming which part should be engaged, the disposable diaper 1 in which the front body and the back body can be engaged and separated can be easily attached.

  As shown in FIGS. 10 to 12, when the wearer wears the disposable diaper 1, the first engagement portion 40, the fourth engagement portion 43, the second engagement portion 41, and the third engagement 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 pressed or the fit of the waist portion is loose, the engagement position between the second engagement portion 41 and the third engagement portion 42 is adjusted to fit the suspension.

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 9, 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. The three-dimensional gather BS is formed by the gathered nonwoven fabric 15. As the gathered nonwoven fabric, as shown in FIG. 5 to FIG. 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. 5 in the product state. It is.

  The liquid-impermeable back 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 gather 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, 2, and 4, 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, 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 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.

  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 Lower piece 47 Intermediate piece 48 Upper piece 49 Slit (Perforation)
50 Front presser sheet 60 Rear presser sheet F Front body B Rear body

Claims (6)

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 a connecting means capable of engaging and separating the front body and the back body of the exterior sheet By being connected, 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 at least both side edges of the outer surface of the front body, and a second engagement portion extending in the vertical direction along both side edges of the upper side of the inner surface of the front body. A third engagement portion extending in the vertical direction along both side edges of the upper portion of the outer surface of the rear body, and a fourth engagement portion extending in the vertical direction along both side edges of the lower side portion of the inner surface of the rear body Is installed and
Between the third engagement part and the fourth engagement part on both sides of the back body, a slit is formed inward in the width direction, respectively.
When the exterior sheet is connected, the first engagement portion and the fourth engagement portion are engaged, and the second engagement portion and the third engagement portion are engaged, whereby the front body and The back body is connected ,
Before wearing, and the second engaging portion and the third engaging portion that are engaged,
A disposable diaper characterized by that.   The disposable diaper according to claim 1, 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. Support members are provided on both sides of the back body, the third engagement portion is attached along the upper side edge of the outer surface of the support member, and the fourth engagement portion is below the inner surface of the support member. Installed along the side edges,
The disposable diaper according to claim 1 or 2, wherein the slit is formed inward in the width direction between the third engagement portion and the fourth engagement portion of the support member. The support member is folded into a Z shape and forms a lower piece, an intermediate piece, an upper piece in order from the back body side toward the inner surface direction,
The third engagement portion is attached to the outer surface of the upper portion of the upper piece, and the fourth engagement portion is attached to the inner surface of the lower portion of the upper piece,
Wherein said lower piece intermediate piece, the intermediate piece and the upper piece and the disposable diaper according to claim 3, characterized in that the temporarily fixed, respectively. The disposable diaper according to claim 3 or 4, wherein an elastic member is disposed on the support member so that the support member can extend in the width direction.   The disposable diaper according to any one of claims 1 to 5, wherein an end point on the inner side in the width direction of the slit is formed at a position facing the wearer's hipbone.

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