JP6284187B2 - Pants-type disposable diaper - Google Patents

Description

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

  The pants-type disposable diaper includes an exterior body that extends from the wearer's abdomen to the back through the crotch, and an interior body that includes an absorbent body that is fixed to the inner surface of the exterior body. A waist opening and a pair of left and right leg openings are formed by joining both side edges of the body and the back side edges of the exterior body. What is provided with the three-dimensional gather which protrudes to the side is common.

  In the pants-type disposable diaper, various elastic members such as a waist edge elastic member and a waist lower elastic member are fixed to the exterior body in an expanded state in order to improve fit to the body. (For example, see Patent Documents 1 and 2). Here, a plurality of waist edge elastic members are arranged in parallel along the width direction at intervals in the vertical direction at the edge of the waist opening. Further, the waist lower elastic member is disposed along the width direction with a space in the vertical direction in a region closer to the center in the front-rear direction than the waist edge elastic member. The waist edge elastic member and the waist lower elastic member (hereinafter also collectively referred to as the waist elastic member) for tightening the waist portion are cut into portions that overlap the interior body in the center in the width direction. It is common to prevent shrinkage of the material.

  The waistline elastic member generally cannot adjust the tightening force (elastic contraction force), and the current situation is that when the tightening force is strong, the product size is changed. In response to such problems, the present applicant has proposed a pants-type disposable diaper capable of adjusting the tightening force (see Patent Documents 1 and 2).

  However, in the thing of patent document 1, since it is what weakens fastening force using drawing of an elastic member, there is an advantage that it becomes natural appropriate fastening force, but it cannot strengthen fastening force It is. Furthermore, in the thing of patent document 1, the problem that adjustment work is difficult when adjusting a clamping force intentionally, and the problem that it cannot return when the clamping force is made too weak. There is.

  Moreover, the thing of patent document 2 is what can adjust a fastening force as a result by providing the tape for fixing looseness, and shortening the dimension of a fastening direction (namely, size adjustment), The tightening force cannot be adjusted without changing the dimensions. For example, the dimensions around the waist of the diaper are appropriate and cannot be accommodated when simply tightening is desired.

JP 2009-106667 A JP 2002-345890 A

Therefore a main object of the present invention, without changing the girth Ri dimensions, is to provide a pants-type disposable diaper can be adjusted clamping force of the elastic member of the waist portion.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
An exterior body that forms a front body and a back body, and an interior body that includes an absorbent body fixed to the inner surface of the exterior body,
The both sides of the exterior body in the front body and the both sides of the exterior body in the back body are joined to each other, and the longitudinal range corresponding to the joined part is the waist part, and the waist opening and the pair of left and right legs An opening is formed,
The waist portion of the exterior body includes an outer layer and an inner layer, and one or a plurality of waist portion elastic members disposed between the outer layer and the inner layer over both ends in the width direction of the waist portion. In pants-type disposable diapers
Those of at least a portion of said girth Ri elastic member, while being a fixed part of the width direction both end portions fixed to the outer body, between these fixed portions, the free portions of the non-fixed to the outer body Provided,
The free portion is attached to a part of the width direction with a removable member that can be attached to and detached from the exterior body, and a part other than the attached part of the removable member is an extendable and contractible part .
An opening or a perforation for forming the opening is formed in a portion overlapping the detachable member in the outer layer .
A pants-type disposable diaper characterized by that.

(Function and effect)
In the present invention, is fixed to the outer body by winding a barrel circumferential Ri elastic member in the detachable member as required, by moving the detachable member in the width direction or the like for fixing the outer body, the torso circumference Ri elastic member The tightening force can be adjusted by directly extending or contracting the stretchable part. Therefore, in the present invention, (it does not exclude a combination of the trunk circumference Ri size adjusting means) for girth Ri can be adjusted clamping force of the waist elastic member without changing the size. In addition, in the structure of the present invention, it is not necessary to be able to adjust all of the waistline elastic member, so that, for example, the tightening force of the waist lower elastic member can be fixed, and the tightening force of only the waist edge elastic member can be adjusted. It is also possible to make it.

Further, by providing the opening, not only the operation of the detachable member becomes easy, but also the detachable member can be detachably fixed to the outer surface of the outer layer.

<Invention of Claim 2 >
The pants-type disposable diaper according to claim 1, wherein inner and outer surfaces of the detachable member are detachable from the exterior body.

(Function and effect)
Thus, by making the inner and outer surfaces of the detachable member attachable to and detachable from the exterior body, the detachable member can be fixed regardless of the orientation of the detachable member, so that the degree of freedom of adjustment is excellent.

<Invention of Claim 3 >
An opening is formed in a portion overlapping the detachable member in the outer layer,
Of the inner and outer surfaces of the detachable member in the folded free state of the body peripheral Ri elastic member, the inner surface is configured to be removably attached to the outer body, the outer surface is composed of a nonwoven fabric, pants-type disposable claim 1, wherein Diapers.

(Function and effect)
In this embodiment, the tightening force can be increased by extending the extendable portion by a simple operation of pulling the detachable member out of the opening and fixing it to the outer surface of the exterior body without turning over. At this time, since the outer surface of the detachable member is made of non-woven fabric regardless of before and after the movement, the outer surface of the disposable diaper is not exposed to the outer surface of the disposable diaper before and after the adjustment of the tightening force, and the clothing is not exposed. There is an advantage that it is difficult to fix by mistake. This feature is particularly suitable when the surface of the detachable member that is attached to and detached from the exterior body is formed of a hook material of a mechanical fastener.

<Invention of Claim 4 >
An opening is formed in a portion overlapping the detachable member in the outer layer,
Of the inner and outer surfaces of the detachable member in the folded free state of the body peripheral Ri elastic member, the outer surface is configured to be removably attached to the outer body, the inner surface is composed of a nonwoven fabric,
The pants-type disposable diaper according to claim 1.

(Function and effect)
In this embodiment, the retractable member is pulled out from the opening, turned over, and fixed to the outer surface of the exterior body, whereby the expansion / contraction part can be extended to increase the tightening force. At this time, at least after the adjustment, the outer surface of the detachable member is made of a nonwoven fabric. Therefore, the surface of the disposable diaper that is attached to and detached from the exterior body is not exposed at the time of use. There are advantages such as being difficult to fix. This feature is particularly suitable when the surface of the detachable member that is attached to and detached from the exterior body is formed of a hook material of a mechanical fastener.

<Invention of Claim 5 >
The surface of the detachable member attached to and detached from the exterior body is configured by a hook material of a mechanical fastener, and the surface of the exterior body from which the detachable member is attached and detached is configured by a mechanical fastener loop material or a nonwoven fabric.
The underpants type disposable diaper of any one of Claims 1-4 .

(Function and effect)
As a locking means for making the detachable member detachable from the exterior body, it is desirable to use a hook material (male material) of a mechanical fastener (surface fastener) in consideration of peeling strength and strength at the time of rejoining, In that case, the attachment / detachment part of the attachment / detachment member in the exterior body can be constituted by a nonwoven material in addition to the loop material of the mechanical fastener.

As described above, according to the present invention, it becomes possible to adjust the clamping force of the waist elastic member without changing the girth Ri dimensions, advantages such is provided.

It is a top view (inner surface side) of the underpants type disposable diaper of a deployment state. It is a top view (outer surface side) of the underpants type disposable diaper of a deployment state. It is (a): the principal part enlarged view and (b): sectional drawing of the waist edge part of the front body before tightening adjustment. It is CC sectional drawing of FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a perspective view of the wearing state of a pants type disposable diaper. It is a top view which shows the cut pattern of an elastic member. It is the (a): principal part enlarged view of the waist edge part of the front body after clamping adjustment, (b): It is sectional drawing. It is the (a): principal part enlarged view of the waist edge part of the front body before fastening adjustment, (b): The principal part enlarged view. It is the (a): principal part enlarged view of the waist edge part of the front body after clamping adjustment, (b): It is sectional drawing. It is (a): the principal part enlarged view and (b): sectional drawing of the waist edge part of the front body before tightening adjustment. It is the (a): principal part enlarged view of the waist edge part of the front body after clamping adjustment, (b): It is sectional drawing. It is a top view which shows a manufacturing process roughly.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The term “elongation rate” means a value when the natural length is 100%. Moreover, the dot pattern part in a figure has shown joining means, such as a hot-melt-adhesive.
1 to 7 show a pants-type disposable diaper. This pants-type disposable diaper (hereinafter also simply referred to as a diaper) has an exterior body 20 that forms a front body F and a back body B, and an interior body 10 that is fixed to and integrated with the inner surface of the exterior body 20. The interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 and a liquid-impermeable sheet 12. At the time of manufacture, after the back surface of the interior body 10 is joined to the inner surface (upper surface) of the exterior body 20 by a joining means such as a hot-melt adhesive (dotted pattern portion in FIG. 2), the interior body 10 and the exterior body 20 are joined. Is folded at the center in the longitudinal direction (front-rear direction), which is the boundary between the front body F and the back body B, and both side portions thereof are joined to each other by heat welding or hot melt adhesive to form the side seal portion 21. Thus, a pants-type disposable diaper having a waist opening and a pair of left and right leg openings is formed.

(Structural example of interior body)
As shown in FIGS. 5 to 6, the interior body 10 has a structure in which an absorbent body 13 is interposed between a liquid-permeable top sheet 11 made of a nonwoven fabric or the like and a liquid-impermeable sheet 12 made of polyethylene or the like. It absorbs and retains the excreted liquid that has permeated through the top sheet 11. Although the planar shape of the interior body 10 is not particularly limited, it is generally a substantially rectangular shape as illustrated.

  As the liquid-permeable top 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 top 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 surface side of the absorber 13.

  The liquid-impermeable sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13 is a liquid-impermeable plastic sheet such as polyethylene or polypropylene. What has is used suitably. 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. Can be used. 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 absorbent body 13 is formed in a substantially hourglass shape having a narrowed portion 13N having a narrower width than the front and rear sides at the crotch portion. Although the size of the constricted portion 13N can be determined as appropriate, the length in the front-rear direction of the constricted portion 13N can be about 20 to 50% of the total length of the diaper, and the width of the narrowest portion is 40% of the total width of the absorber 13. It can be about -60%. In the case where the constricted portion 13N is provided, if the planar shape of the interior body 10 is substantially rectangular, the remainder of the interior body 10 that does not include the absorber 13 in the portion corresponding to the constricted portion 13N of the absorber 13. A part is formed.

  A solid gather BS that fits around the legs is formed on both sides of the interior body 10. As shown in FIGS. 5 and 6, the three-dimensional gather BS includes a fixed portion fixed to a side portion on the back surface of the interior body, and a side portion on the surface of the interior body from the fixed portion to the side of the interior body. The body part that extends to the front, the front and rear ends of the body part in a lying state, and the lying part that is fixed to the side of the surface of the interior body, and the freedom part that is formed with this lying part being unfixed The portion is formed of a gathered nonwoven fabric 15 that is turned into a double sheet by folding.

  Further, between the double sheets, an elongated gather elastic member 16 is disposed at the tip of the free part. The gather elastic member 16 is for forming a three-dimensional gather BS by raising a non-woven fabric portion protruding from the absorber side edge by elastic stretching force as shown by a two-dot chain line in FIG. 5 in the product state.

  The liquid-impermeable sheet 12 enters the double sheet-like gather 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 this liquid-impermeable sheet 12, it is desirable to use an opaque sheet so that brown color 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.

The gathers elastic member 16, it is possible to use styrene-based rubber, olefin-based rubber generally used, urethane rubber, ester-based rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone over emissions, materials such as polyester. 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. The gathered elastic member 16 may be a tape-like member having a certain width in addition to the thread-like shape shown in the figure.

In the same manner as the liquid-permeable top 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 the gather nonwoven 15 has a function of preventing permeation such as urine, in order to enhance the feel of the preventing and skin rash (dry feeling), silicone chromatography emission system, paraffin metallic, alkyl chromic chloride overrided system It is desirable to use a water repellent nonwoven fabric coated with a water repellent or the like.

(External body structure example)
As shown in FIGS. 4 to 6, the exterior body 20 includes an inner sheet 20 </ b> A and an outer sheet 20 </ b> B each made of a sheet such as a nonwoven fabric (that is, the outer sheet 20 </ b> B is the outermost nonwoven fabric in this embodiment) 2. Various elastic members are disposed between the inner sheet 20A and the outer sheet 20B, and between the folded part formed by folding the outer sheet 20B to the inner surface side at the waist opening edge and the facing part. The elasticity is given. Planar shape, the concave leg circumference Ri lines 29 formed to form the respective leg openings in the intermediate sides, and has a pseudo hourglass shape as a whole.

In the exterior body 20 of the illustrated form, as the elastic member, in the developed shape shown in FIGS. 1 and 2, the waist edge elastic member 24 disposed in the vicinity of the waist opening 23, the front body F and the back body B And a plurality of lower waist elastic members 25 arranged along the width direction at intervals in the vertical direction, and separately from the lower waist elastic member group 25 in each of the front body F and the back body B. , Extending from one side seal portion 21 to the crotch portion along one leg opening, crossing the crotch portion, and extending along the other leg opening in a pattern that reaches the other side seal portion 21. There are provided a plurality of curved elastic members 26 and 28 arranged at intervals without crossing each other. These elastic members 24 to 28 are fixed in a state of being stretched at a predetermined stretch rate along their extending directions. In Hongaiso body 20, consecutive to the side seal portion of the back body B from the side seal portion of the body F before along the leg circumference Ri line 29, Tokoroiashi circumferential Ri elastic member is not provided.

The waist edge elastic member 24 includes a plurality of thread rubbers arranged in the vicinity of the waist opening edge in the vicinity of the waist opening edge in the range of the side seal portion 21 where the front body F and the back body B are joined. of an elongated elastic member is provided for attaching the diaper to the body by providing the stretching force to tighten the Ri waist circumference of the body. For the waist edge elastic member 24, rubber thread is used in the illustrated example. However, for example, a tape-like elastic member may be used. In addition, the waist edge elastic member 24 in the illustrated form is disposed between the inner layer 20C formed of the folded portion of the outer sheet 20B in the waist portion and the outer layer 20D formed of the outer portion opposed thereto. It may be arranged between the inner sheet 20A and the outer sheet 20B. In that case, the inner sheet 20A forms an inner layer, and the outer sheet 20B forms an outer layer.

  The waist lower elastic member 25 is an elongated elastic member such as rubber thread, which is disposed at intervals in the vertical direction over a range from the upper portion to the lower portion of the side seal portion 21. This is for giving a stretchable force in the width direction to the waist circumference part of the back body B, so that the diaper is in close contact with the body. Note that the boundary between the waist edge elastic member 24 and the waist lower elastic member 25 is not necessarily clear. For example, even if the number of the elastic members arranged in the width direction with the front body F and the back body B being spaced apart in the vertical direction cannot be specified, several on the upper side function as the waist edge elastic members. And the remaining elastic members should just function as a waist lower elastic member.

  In the back body B, the dorsal curved elastic member 26 disposed separately from the waist lower elastic member 25 is an elongated elastic member such as rubber thread, and is disposed along a predetermined curve. 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, the elastic elastic members 26 are elongated elastic members such as five rubber threads. They are arranged at intervals without crossing. This dorsal curved elastic member group 26 is not arranged as a bundle of about two or three elastic members with a close interval, but 3-20 mm so as to form a predetermined stretch zone, Preferably, 3 or more, preferably 5 or more are arranged with an interval of about 6 to 16 mm.

  In the front body F of the exterior body 20, the abdomen curved elastic member 28 arranged separately from the waist lower elastic member group 25 is an elongated elastic member such as rubber thread, and is arranged along a predetermined curve. Yes. There may be one ventral curved elastic member 28, but preferably there are a plurality of ventricular curved elastic members 28. In the illustrated example, there are five thread-like elastic members, and these ventral curved elastic members 28 do not cross each other. , Spaced apart. This ventral curved elastic member group 28 is also arranged in a bundle of about two or three elastic members at a close interval and substantially in a bundle, but 3 to 20 mm so as to form a predetermined stretch zone, Preferably, 3 or more, preferably 5 or more are arranged with an interval of about 6 to 16 mm.

  In the illustrated example, the waist lower elastic member 25 and the curved elastic members 26 and 28 disposed in the front body F and the back body B are continuously fixed to the exterior body during manufacturing, as shown in FIG. After that, a part or all of the portion overlapping with the interior body is cut into a non-shrinkable portion (that is, a portion overlapping with the cutting pattern CP in FIG. 8) where the contraction force does not act by being finely cut with a predetermined cutting pattern CP A portion extending while being curved to the side from the non-shrinkable portion is a contracted portion on which a contracting force acts (that is, the waist lower elastic member 25 and the curved elastic members 26 and 28 on the side of the cutting pattern CP in FIG. The part left continuously). For this reason, after the waist lower elastic member 25 and the curved elastic members 26 and 28 are continuously provided from the side seal portion 21 on one side to the side seal portion 21 on the other side (opposite side) across the interior body 10, Part or all of the portion overlapping with the interior body is finely cut. Thereby, the shrinkage | contraction of the width direction of an interior body (especially absorber 13) can be prevented more. Of course, the waist lower elastic member 25 and the curved elastic members 26, 28 can also be disposed continuously across the interior body 10.

  The exterior body 20 mentioned above can be manufactured by the technique of Unexamined-Japanese-Patent No. 4-28363 or Unexamined-Japanese-Patent No. 11-332913, for example. 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. A cutting method 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 and 28 are provided on both the front body F and the back body B, the curved elastic members 26 and 28 are disposed on the back body B side and a part or all of the group of curved elastic members disposed on the front body F side. Although a form (not shown) in which a part or all of the group of curved elastic members B intersected can be adopted, the group of curved elastic members 28 arranged on the front body F side, as shown in the example, A configuration in which the curved elastic members B arranged on the 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 is preferable. It is preferable that the minimum longitudinal separation distance in the direction separation range 90 is about 10 to 15 mm, and a wide fixed region described later is provided in this portion.

  Further, the curved elastic members 26 and 28 do not have to be entirely curved, and may partially have a linear portion.

  The elongation rate when the elastic members 24 to 28 are fixed can be determined as appropriate. However, in the case of a normal adult, the waist edge elastic member 24 is about 230 to 320%, and the waist lower elastic member 25 is 230 to 320%. The curved elastic members 26 and 28 can be about 230 to 320%.

(Front / rear presser sheet)
As shown in FIGS. 1 and 4, in order to cover the front and rear end portions of the interior body 10 mounted on the inner surface of the exterior body 20 and to prevent leakage from the front and rear edges of the interior body 10, 50, 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 part 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 part), not only the adhesive does not stick out, but this part is also removed from the top 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. For this reason, the folded portion 20C formed by folding the exterior body 20 on the inner surface of the diaper can be extended to a portion that overlaps the absorbent pad to form a portion equivalent to the presser sheets 50 and 60 described above.

(Tightening adjustment means)
Characteristically, as shown in FIG. 3, the waist edge elastic member 24 in the front body F is a fixed portion 24 f in which both ends in the width direction are fixed to the exterior body 20, and between these fixed portions 24 f. A non-fixed (movable) free portion 24m is provided on the outer layer 20D and the inner layer 20C. In addition, the free portion 24m has a detachable member 30 that can be attached to and detached from the exterior body at a part in the width direction, and a portion other than the attached portion of the detachable member 30 is an extendable and retractable portion 24t.

  In order to form the fixed portion 24f and the free portion 24m, in the illustrated embodiment, the inner layer 20C and the outer layer 20D are joined to each other at both ends of the waist edge elastic member 24 in the longitudinal direction by a hot melt adhesive HM or the like. In the region where the detachable member 30 is located, the inner layer 20C and the outer layer 20D are not joined, and only the portion between the waist edge elastic member 24 is located between the fixing portion 24f and the region where the detachable member 30 is located. The inner layer 20C and the outer layer 20D are joined by a hot melt adhesive HM or the like. In the illustrated form, the joining of the inner layer 20C and the outer layer 20D between the fixing portion 24f and the region where the detachable member 30 is located is continued in the width direction, but may be intermittently joined in the width direction. Further, in the illustrated embodiment, the inner layer 20C and the outer layer 20D in the fixing portion 24f are continuously joined in the longitudinal direction, but intermittently in the longitudinal direction as long as the passing position of the waist edge elastic member 24 is joined. You may join.

  The position of the detachable member 30 can be determined as appropriate. In the illustrated example, the detachable member 30 is arranged close to one end in the width direction. However, the position can be set to an appropriate position such as the center in the width direction. Moreover, although the dimension of the attachment / detachment member 30 can be suitably determined as long as the expansion / contraction part 24t can be secured, it can be 10 to 20% of the diaper full width W in a normal case.

  Moreover, the opening part 40 is formed in the part which overlaps with the attaching / detaching member 30 in outer side layer 20D. The opening 40 may have at least one dimension in the vertical direction and the width direction smaller than that of the detachable member 30, but in the illustrated embodiment, the dimension in the vertical direction and the width direction is increased. The longitudinal dimension and the width dimension of the opening 40 can be 0.7 to 1.5 times the longitudinal dimension and the width dimension of the detachable member 30, for example.

  As a locking means for making the detachable member 30 detachable from the exterior body 20, in consideration of peeling strength and strength at the time of rejoining, a hook material 31 (mechanical fastener (surface fastener)) 31 ( Although it is desirable to use a male material, it can also be used as an adhesive layer. In addition to providing these locking means on other sheet materials such as non-woven fabric, in the case of a sheet-like member like the hook material 31, the detachable member 30 may be formed by the locking means as shown in the figure. it can. On the other hand, the attachment / detachment portion of the attachment / detachment member 30 in the exterior body 20 can be formed of an appropriate material capable of engaging the engagement means of the attachment / detachment member 30, for example, as the engagement means of the attachment / detachment member 30 as shown in the figure. When the hook material 31 of the mechanical fastener is used, it is desirable to fix the loop material 32 of the mechanical fastener to the attachment / detachment portion of the exterior body 20. However, when the material of the exterior body 20 is a nonwoven fabric, the loop material 32 is omitted. Or it can replace with the loop material 32 and can also fix a nonwoven fabric. For example, in the form shown in FIG. 3, the loop material 32 is provided at the initial position (product state position) of the hook material 31 on the outer surface of the inner layer 20C, but this loop material 32 may be omitted or illustrated. However, the loop member 32 on the outer surface of the outer layer 20D can be omitted.

As long as the detachable member 30 is a member for fixing a part in the width direction of the waist edge elastic member 24 to the exterior body 20, the shape and structure are not particularly limited. For example, in the form shown in FIG. Of the inner surface and the outer surface of the detachable member 30 in a state where the edge elastic member 24 is not folded back (product state or a state before use), the inner surface is made detachable from the exterior body 20 and the outer surface is covered with a cover sheet 33 made of a nonwoven fabric. It is configured. For this reason, in the illustrated embodiment, the detachable member 30 is configured by sandwiching and integrating the waist edge elastic member 24 between the hook member 31 on the inner surface side and the cover sheet 33 on the outer surface side. In this form, as shown in FIG. 9, the detachable member 30 is pulled out from the opening 40 and fixed to the outer surface of the exterior body 20 without turning over, and the expansion / contraction part 24t is extended to provide a tightening force. Can be strong. At this time, since the outer surface of the detachable member 30 is made of non-woven fabric regardless of before and after the movement, the surface of the detachable member 30 that is attached to and detached from the exterior body 20 is exposed on the outer surface of the disposable diaper before and after adjusting the tightening force. In addition, there is an advantage that it is difficult to be erroneously fixed to clothing or the like.
On the other hand, as shown in FIG. 10, among the inner and outer surfaces of the detachable member 30 in a state where the waist edge elastic member 24 is not folded back (a product state or a state before use), the outer surface is detachable from the exterior body 20. And the form by which the inner surface is comprised with the cover sheet 33 which consists of a nonwoven fabric is also proposed. Specifically, in the illustrated form, the detachable member 30 is configured by sandwiching and integrating the waist edge elastic member 24 between the nonwoven fabric on the inner surface side and the hook material 31 on the outer surface side. In this embodiment, as shown in FIG. 11, the retractable member 30 is turned upside down and pulled out from the opening 40 and fixed to the outer surface of the exterior body 20. it can. Moreover, at least after adjustment, the outer surface of the detachable member 30 is made of non-woven fabric, so that the surface of the detachable member 30 that is attached to and detached from the exterior body 20 is not exposed to the outer surface of the disposable diaper during use. There is an advantage that it is difficult to fix by mistake.

Moreover, as shown in FIG. 12, it can also be set as the form by which the inner and outer both surfaces of the attachment or detachment member 30 are made detachable with respect to the exterior body 20. As shown in FIG. For this reason, in the illustrated embodiment, the detachable member 30 is configured by sandwiching and integrating the waist edge elastic member 24 between the hook member 31 on the inner surface side and the hook member 31 on the outer surface side. In this embodiment, since both the inner and outer surfaces of the detachable member 30 can be detachably attached to the exterior body 20 in this manner, the detachable member 30 can be fixed regardless of the orientation of the detachable member 30, and therefore, the degree of freedom of adjustment is excellent. . For example, as shown in FIG. 13, it is possible to tightly clamping force by fixing the outer sheath body 20 a barrel circumferential Ri elastic member in detachable member 30 from the wound suitable number. When this winding form is adopted, the detachable member 30 can be fixed to the original position without being pulled out from the opening 40 as shown in FIG. Of course, it is also possible to pull out from the opening 40 and fix to the outer surface of the outer layer 20D. In addition, when this winding form is adopted, cut portions 35 are provided at both ends in the width direction of the detachable member 30 to facilitate winding of the waist edge elastic member 24 and prevention of deviation of the wound waist edge elastic member 24. It is also desirable to plan.

(Production method)
Although a manufacturing method is not specifically limited, The disposable diaper of this invention can be manufactured by the method shown in order, for example in FIG. That is, the form shown in FIG. 14 (a) shows the manufacturing process of the form shown in FIG. 12, and the hook material 32 is pasted on a predetermined portion on the inner layer 20C and cut into a predetermined dimension thereon. After locking one side of the locking surface of 31 in the CD direction (direction orthogonal to the line flow direction (MD direction)), the waist edge elastic elastic portion 24t material is placed on the CD, and then the CD of the hook material 31 is placed. The other side of the direction is folded back on one side and fixed with the waist edge elastic member 24 sandwiched therebetween, and then the outer layer 20D that has been previously cut off the opening 40 is covered so that the position of the opening 40 matches the hook material 31. It is bonded to the inner layer 20C. 14B shows a manufacturing process of the form shown in FIG. 10, and the hook member 31 and the cover sheet 33 are previously bonded to the inner layer 20C at a predetermined interval to attach / detach the member 30. After placing the waist edge elastic expansion / contraction part 24t material attached, the outer layer 20D that cuts the opening 40 in advance and affixed the loop material 32 is placed so that the position of the opening 40 fits the hook material 31, It is bonded to the inner layer 20C. Furthermore, the form shown in FIG. 14 (c) shows the manufacturing process of the form shown in FIG. 3, and a hook material obtained by attaching a loop material 32 to a predetermined portion on the inner layer 20C and cutting it to a predetermined size thereon. After locking the locking surface of 31, the waist edge elastic stretchable part 24 t material is disposed thereon, and then a non-woven fabric cut to a predetermined size is pasted, and the waist edge elastic member 24 is sandwiched and fixed. Thereafter, the opening 40 is cut in advance, and the outer layer 20D to which the loop material 32 is attached is placed so that the position of the opening 40 matches the hook material 31, and is bonded to the inner layer 20C.

(Other)
In the above embodiment, the tightening force of the waist lower elastic member 25 is fixed and the tightening force of only the waist edge elastic member 24 can be adjusted. Conversely, the tightening force of the waist edge elastic member 24 is fixed. As described above, the tightening force of only the waist lower elastic member 25 can be adjusted, all the tightening forces of the waist edge elastic member 24 and the waist lower elastic member 25 can be adjusted, It is also possible to make it possible to adjust the tightening force of only the portion or only a part of the waist lower elastic member 25. In summary, the present invention may be any adjustable at least part clamping force of the body peripheral Ri elastic member.

Although the adjustable clamping force of Ri girth only front body F in the illustrated embodiment, or an adjustable clamping force of the cylinder circumference Ri of the back body B Alternatively, before the body F and the back body B or you can and can adjust the clamping force of Ri girth in both.

  Further, the opening 40 may be closed by another sheet so that it can be opened and closed or opened, or a part of or the entire outer layer 20D may be cut off to form the opening 40 in the outer layer 20D. good.

  The present invention can be used in a pants-type disposable diaper as in the above example.

B ... Back body, F ... Front body, HM ... Hot melt adhesive, 10 ... Interior body, 11 ... Top sheet, 12 ... Liquid impervious sheet, 13 ... Absorber, 13N ... Constricted part, 14 ... Packaging sheet, DESCRIPTION OF SYMBOLS 15 ... Gather nonwoven fabric, 16 ... Gather elastic member, 20 ... Exterior body, 20C ... Inner layer, 20D ... Outer layer, 21 ... Side seal part, 24 ... Waist edge elastic member, 24f ... Fixed part, 24m ... Free part, 24t ... stretch unit, 25 ... under the waist side elastic member, 26, 28 ... curved elastic member, 26 ... back-side curved elastic member, 28 ... ventral curved elastic member, 29 ... leg circumferential Ri line, 30 ... removable member, 31 ... hook material, 32 ... loop material, 33 ... cover sheet, 35 ... notch, 40 ... opening.

Claims (5)

An exterior body that forms a front body and a back body, and an interior body that includes an absorbent body fixed to the inner surface of the exterior body,
The both sides of the exterior body in the front body and the both sides of the exterior body in the back body are joined to each other, and the longitudinal range corresponding to the joined part is the waist part, and the waist opening and the pair of left and right legs An opening is formed,
The waist portion of the exterior body includes an outer layer and an inner layer, and one or a plurality of waist portion elastic members disposed between the outer layer and the inner layer over both ends in the width direction of the waist portion. In pants-type disposable diapers
Those of at least a portion of said girth Ri elastic member, while being a fixed part of the width direction both end portions fixed to the outer body, between these fixed portions, the free portions of the non-fixed to the outer body Provided,
The free portion is attached to a part of the width direction with a removable member that can be attached to and detached from the exterior body, and a part other than the attached part of the removable member is an extendable and contractible part .
An opening or a perforation for forming the opening is formed in a portion overlapping the detachable member in the outer layer .
A pants-type disposable diaper characterized by that.   The pants-type disposable diaper according to claim 1, wherein inner and outer surfaces of the detachable member are detachable from the exterior body. An opening is formed in a portion overlapping the detachable member in the outer layer,
Of the inner and outer surfaces of the detachable member in the folded free state of the body peripheral Ri elastic member, the inner surface is configured to be removably attached to the outer body, the outer surface is composed of a nonwoven fabric, pants-type disposable claim 1, wherein Diapers. An opening is formed in a portion overlapping the detachable member in the outer layer,
Of the inner and outer surfaces of the detachable member in the folded free state of the body peripheral Ri elastic member, the outer surface is configured to be removably attached to the outer body, the inner surface is composed of a nonwoven fabric,
The pants-type disposable diaper according to claim 1. The surface of the detachable member attached to and detached from the exterior body is configured by a hook material of a mechanical fastener, and the surface of the exterior body from which the detachable member is attached and detached is configured by a mechanical fastener loop material or a nonwoven fabric.
The underpants type disposable diaper of any one of Claims 1-4 .

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