JPH09117472A - Pants type one way diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fitting feeling, etc., by forming an outer member comprising the utmost outside having a larger width than that of an absorbing member itself and a pair of the side sheets wherein the part where the side sheet is arranged on the utmost outside sheet is formed as a side flap part being stretchable and elastic. SOLUTION: A pants type disposable diaper 1 comprises an opening 2 around waist with an elastic ribbon 5 and an opening 3 around the legs. A diaper main body 26 is formed by jointing an absorbing material 9 and an outer member 18, wherein a front part 6 extending between the openings 3 around the legs and a rear part 7 is joined with a side seam 8. The outer member 18 comprises a pair of side sheets 16 on the utmost outside 24. The part where a pair of the side sheets 16 are formed on the utmost outside sheet is formed as a side flap part and a stretchable and elastic member 15 is arranged around the pair of the openings around the legs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pants-type diaper for babies or incontinence.

[0002]

2. Description of the Related Art In a disposable diaper comprising an absorbent main body and an outermost layer sheet for holding the absorbent main body against a wearer, the absorbent main body is detachably joined from the outermost layer sheet, A cross-section center part is made of a single-layer fibrous sheet, and both side edges forming the leg openings are made of a plurality of fibrous sheets (or a vapor-permeable film sandwiched between a plurality of fibrous sheets). JP-A-6-63074
No. 6,086,045. Further, the outermost layer sheet is made of a water-repellent sheet and is releasably joined to the outermost layer sheet only in the central region of the absorbent main body so as to tighten the waistline between the waist opening and the leg opening of the outermost layer sheet. A diaper having a stretchable elastic member is disclosed in Japanese Patent Laid-Open No. 5-76.
It is disclosed in Japanese Patent No. 565.

[0003]

A pant-type disposable diaper is required to be easy to put on and take off. Especially, considering that an infant or the like wears the diaper by himself / herself, the above-mentioned prior art No. The disposable diaper disclosed in Japanese Patent No. 63074 has a single-layer fiber layer in the center of the outer cross-section sheet as a cross-section, and thus is effective in preventing stuffiness during wear (or following the wearer's crotch). It is excellent, but since it has no leakproof property, when excrement leaks from the absorbent main body, it may exude and leak without being retained in the outermost layer sheet.

Further, in the disposable diapers described in JP-A-6-63074 and JP-A-5-76565, the absorbent main body has an outermost sheet so that only a portion soiled by excrement can be replaced. It seems that it is economical at first glance because it is temporarily joined so that it can be peeled off, but when wearing it, the legs are caught at both longitudinal edges of the absorbent main body and the absorbent main body peels off, and the leg opening occurs. When inserting the legs into the body, the legs are caught on both edges of the absorbent body and the absorbent body shifts, or if the wearer who has a lot of exercise, the absorbent body shifts in the outermost sheet during absorption. It is very difficult to hold the main body in position on the outermost layer sheet, leading to leakage of excrement due to insufficient joining, and as a result, it is necessary to wash the outermost layer sheet every time the diaper is changed. On the contrary, it takes time and effort.

In addition, in the pants-type disposable diaper, the elasticity around the waist is an important factor for the infant to wear the diaper, and it is desirable that the opening be as wide as possible. It is desirable that the outermost sheet that holds the absorbent main body is in close contact with the wearer, especially around the waist and side around the waist, from the viewpoint of not only slipping off the diaper when wearing it but also looking good. In the disposable diaper disclosed in JP-A-5-76565, an elastic elastic member is arranged around the waist opening, leg openings and the waist between the openings to form a gather to fit the wearer. Gathers made of elastic members arranged around the waist are underwear (pants)
The appearance is not as good as that of the above, and depending on the body type, the wearer may feel uncomfortable due to the tightening by the elastic member, or the mark of the elastic member may remain red around the waist of the wearer.
The present invention overcomes the problems of the conventional diaper for use, and provides a good-fitting diaper that does not slip off the wearer when worn, does not leak excrement, and does not get damp. The purpose is.

[0006]

The diaper according to the present invention for attaining the above-mentioned object is provided with elastic elasticity to at least side flap portions on both sides in the longitudinal direction of an exterior member holding an absorbent main body. The elastic ribbon around the waist is attached to both longitudinal edges of the main body in a state where the side flaps are extended and is covered so as to wrap around both longitudinal edges of the diaper body.

That is, the disposable diaper of the present invention comprises an absorbent main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the both sheets, and The absorbent main body is joined by at least a part, and comprises an exterior member that surrounds the waist of the wearer's belly and wears the absorbent main body against the wearer when the wearer wears the front body and the back body of the exterior member. A pant-type wearer in which opposing side edges are joined to form a waist opening and a pair of leg openings, and a stretchable elastic member is arranged along the waist opening and the pair of leg openings. In the diaper, the exterior member is composed of an outermost layer sheet having a width wider than the width of the absorbent main body and a pair of side sheets, and is a position at which the absorbent main body of the outermost layer sheet is arranged in a longitudinal direction. direction The central region along is composed of only the outermost layer sheet, the pair of side sheets, on the outermost layer sheet, of the central region along the longitudinal direction which is the position where the absorbent main body is arranged from the side edge of the outermost layer sheet. The portion that is arranged in the vicinity and on which the side sheet is arranged on the outermost layer sheet is formed as a side flap portion having elastic elasticity, and the pair of side flap portions of the exterior member is provided. At the position of the leg opening,
A leg-opening elastic member is arranged between the outermost sheet and the side sheet along the leg-opening, and elastic ribbons are provided in the waist-opening at both ends in the longitudinal direction of the diaper. Is attached so as to wrap around, and an opening around the waist having elastic elasticity is formed.

The disposable diaper according to the present invention is characterized in that both side regions of the exterior member have moisture permeability.

Further, in the disposable diaper of the present invention, the absorbent main body is joined to the exterior member via an adhesive area provided on the outermost layer sheet in the longitudinal central region of the exterior member. It is characterized by.

Further, the disposable diaper of the present invention is characterized in that the absorbent main body has liquid impermeable three-dimensional gathers standing on both sides thereof by elastic elastic members.

Furthermore, the present invention is characterized in that the outermost layer sheet is liquid impermeable and breathable.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the disposable diaper of the present invention having the above-described structure, the elastic elastic member is provided in the waist opening of the diaper in a predetermined region on the fold line side of the folded ribbon made of non-woven fabric or the like. An elastic ribbon having a stretchable region provided and a sandwiching and joining region attached so as to sandwich both longitudinal edges of the diaper body formed by overlapping and joining the absorbent main body and the exterior member, The diaper body is attached by sandwiching both side edges in the longitudinal direction of the diaper body in a state where the side flap portions having elastic elasticity of the exterior member constituting the diaper body are stretched and joined in the sandwiching and joining region.

The side flap portion of the exterior member which has elastic elasticity allows the opening portion around the waist to be widened so that the side flap portion can be expanded and detached easily when the diaper is attached and detached. The tensioned state has the function of holding the absorbent main body without causing the absorbent main body to slip off after wearing, so that a better usability can be obtained. Therefore, the features of the present invention are
Prepare an elastic ribbon formed separately from the diaper body consisting of the absorbent body and the exterior member, and attach it by sandwiching both longitudinal ends of the diaper body with the side flaps stretched in the width direction. After joining, both ends of the side flaps facing each other on the ventral side and the dorsal side are joined to form an opening around the waist.

The elastic ribbon can be obtained by arranging a stretchable elastic member on a sheet having no stretchability. The stretch limit in the elasticity of the elastic ribbon is governed by the length of the sheet, and the length corresponds to the maximum product width when attaching the elastic ribbon to the diaper body, but as in the present invention, In order to effectively develop the stretchability of the side flap portion, it is indispensable to sandwich and join the elastic ribbon to both longitudinal edges of the diaper body in a state where the side flap portion is stretched. Further, since both longitudinal edges of the diaper body and longitudinal edges of the absorbent body are aligned with each other, both longitudinal edges of the diaper body are sandwiched and joined by elastic ribbons so that both longitudinal ends of the absorbent body can be joined. The edges are also pinched. Therefore, in the disposable diaper of the present invention, the absorbent main body does not move out of position when wearing or wearing, and there is no leakage accompanying the displacement.

The disposable diaper of the present invention preferably has liquid-impermeable solid gathers on both sides of the absorbent main body. The liquid-impermeable three-dimensional gather of the absorbent main body has its longitudinal center portion raised by the action of the elastic elastic member arranged at its free edge to seal between the body of the diaper wearer and the three-dimensional gather. Form a pouch between the free edge and the proximal portion of the to prevent leakage. For the liquid impermeable three-dimensional gather, a soft, water-impermeable sheet that is thinner than the back sheet is used on the inside, and a non-woven sheet is used on the outside that touches the wearer's skin. Therefore, it does not make the wearer feel uncomfortable. Furthermore, since the central area in the longitudinal direction of the exterior member has air permeability, and both longitudinal areas have moisture permeability,
Will not get damp while wearing a diaper.

Further, the absorbent main body is joined to the exterior member via an adhesive region provided in the longitudinal central region of the exterior member, so that the texture of the exterior member is not deteriorated and the absorbability is further improved. Since the rising of the free edge of the three-dimensional gather of the main body is not hindered and the wearer's movement is always followed, it is possible to provide a diaper having a good usability without leakage.

[0017]

The present invention will now be described in more detail with reference to the drawings showing examples of the present invention, but the present invention is not limited to these examples. FIG. 1 is a perspective view of a disposable diaper according to the present invention, in which side seams are adhesively closed to form a three-dimensional pants type in advance. The pants-type disposable diaper 1 of FIG. 1 has a waist-opening 2 and a leg-opening 3, and an elastic ribbon 5 is attached to the waist-opening at a portion of a sandwiching joint area 17 (see FIG. 8). Has been. Further, the front body 6 and the rear body 7 formed to extend between the left and right leg openings are adhesively closed by side seams 8.

The adhesive closure of the side seams 8 is due to the absorbent body 9
The front body 6 and the back body 7 are overlapped with each other via the crotch portion of the exterior member 18 so that both side edges protrude outward, or both side edges protrude inward, or one side edge. The outer side and the other side edge inside, and in a state of being overlapped, hot melt adhesive along the outermost of both side edges,
Joining is carried out by employing pressure melting, ultrasonic melting, etc. alone or in combination.

FIG. 2 is a perspective view showing a case where the side seam 8 of the pants-type diaper 1 of the present invention shown in FIG. 1 is opened and expanded to make the elastic member free. 9 and the exterior member 18 are joined together to form the diaper body 26 (see FIG. 4), and the elastic ribbon 5 is attached around the waist in the region of the holding and joining region 17, and when worn in the state of FIG. 1. The side portions joined to each other by the side seams 8 are shown as the edges of the side flaps 4 when they are opened and deployed, and left and right leg-opening elastic members 15 are provided.

FIG. 3 is an exploded perspective view showing the absorbent main body 9 and the exterior member 18 constituting the pants-type disposable diaper of the present invention in an expanded state. The width of the absorbent main body 9 is the exterior. It is wider than the width of the central region in the longitudinal direction of the member 18, which is composed of only the outermost sheet 24.

In FIG. 3, the absorbent main body 9 is composed of a liquid-permeable top sheet 10, a liquid-impermeable back sheet 11, an absorber 12, and a three-dimensional gather elastic member 14, and is provided on both side edges of the absorbent main body 9. Has a three-dimensional gather 13. In addition, as shown in FIG.
In order to form 3, the three-dimensional gather folded-back portion 19 near both ends in the longitudinal direction of the absorbent main body 9 includes the top sheet 10, the back sheet 11, the three-dimensional gather elastic elastic member 14, and an adhesive (not shown) for fixing these together. ) And so on. Further, the three-dimensional gather may be formed separately from the material forming the absorbent main body 9 and attached to the side edge portion of the absorbent main body.

The exterior member 18 is provided with stretchable elastic members 15 around the legs which are arranged in an extended state on both sides of the outermost sheet 24.
A pair of side seats 16 are disposed so as to sandwich the above. The leg elastic elastic member 15 is arranged at least in the crotch part of the diaper, but in order to improve the fitting property and the leak preventing function, and in order for the wearer to wear comfortably, there are gathers around the leg. It is preferable that the curved portion be arranged along the opening around the leg.

The pair of left and right side seams 8 of the front body 6 and the back body 7 which are joined and fixed when formed into a pants-type diaper are such that the outermost sheets 24 are bonded to each other. The outermost sheet 24 may be laminated with the side sheets 16 and the side sheets 16 may be adhered to each other. In addition, the side seats 16 are provided on the side seam portions 8 on both side edges of the outermost layer seat 24.
Alternatively, a method may be used in which strip-shaped sealing sheets having a good sealing property, such as polyethylene, which are separate from both sheets, are laminated and the sheets are bonded to each other without the presence of the sheet. In any of the above cases, considering the efficiency of adhesive fixation, the front body 6 and the back body 7 are overlapped with each other via the crotch portion of the exterior member 18 so that the absorber is inside, and both side edges are projected outward. It is preferable to bond them in a state.

FIG. 4 is a plan development view showing a case where the absorbent main body 9 and the exterior member 18 are joined to form the diaper main body 26. As shown in FIG. 4, the absorbent main body 9 is formed by the hot melt adhesive layer 25 (see FIG. 3) provided on the outermost layer sheet 24 in the central region in the longitudinal direction of the exterior member 18.
To form a diaper body 26. Further, this bonding area does not need to cover the entire surface of the absorbent main body 9,
As shown in FIG. 3 and FIG. 12, at least one straight line portion connecting both ends in the longitudinal direction of the absorbent main body 9 is sufficient, and both side edges in the width direction of the absorbent main body 9 are not joined. It is rather preferable that the absorbent body has good adhesion and conformability to the body when worn.

The hot-melt adhesive may be applied by any method such as beads, spirals, melt-blowing, etc. However, since the texture of the sheet tends to be poor at the position where the adhesive is applied, the adhesion area is minimized. Preferably. In FIG. 3, two linear adhesive areas 2 are formed by the bead method.
5 shows an example in which the sheets are joined together, and FIG. 12 shows an example in which the sheets are joined in one linear adhesive zone 25.
You may perform it in the adhesion area | region of a book or more.

FIG. 5 is a perspective view showing a state in which the side sheets 16 arranged on both side edges of the absorbent main body 9 in the diaper body 26 shown in FIG. 4 are extended in the width direction. Is longer than the state shown in FIG.

FIG. 6 is a perspective view showing a state in which the elastic sheets 5 are attached to both longitudinal ends of the diaper while the side sheet 16 in the diaper body 26 shown in FIG. At this time, since the side sheet 16 in the diaper body 26 is joined to the elastic ribbon 5 in the stretched state, when it is completed as the pants-type diaper shown in FIG. The width of the diaper body 26 shown in FIG. 2 can be expanded, and the opening 2 is large so that it can be easily put on and taken off. It fits closely to the wearer around, does not fall off the diaper and looks good.

Further, since the longitudinal end edges of the three-dimensional gather folding portion 19 are covered by the elastic ribbon 5 so as to be sandwiched therebetween, the fit around the elastic ribbon which is in close contact with the wearer is good, and the three-dimensional gather folding portion 19 is three-dimensional. The materials that make up the gathers are overlapped to form a convex shape,
Even if the texture is hardened, the strip-shaped sheet 20 continuous in the width direction is in contact with the skin, so that the wearer does not feel uncomfortable.

FIG. 7 is a transverse cross-sectional view taken along the line XX 'in FIG. 2. The exterior member 18 shows a structure in which the side sheets 16 are arranged on both side edges of the outermost layer sheet 24. Leg elastic elastic members 15 are attached between the seats. Further, as shown in FIG. 13, since the three-dimensional gather 13 and the three-dimensional gather folded-back portion 19 directly contact the wearer's skin, a thin, soft, and soft-feeling liquid separate from the material forming the absorbent main body 9 Impermeable composite sheet 11
′ And may be attached to the side edge of the absorbent body. At this time, the liquid impermeable composite sheet 11 ′ of the three-dimensional gather 13 is joined to the liquid impermeable back sheet 11 so as to extend outward from the side edge of the absorber.

Liquid impermeable composite sheet 11 of three-dimensional gather
The liquid-impermeable sheet 1 has a non-woven fabric for improving the touch so that the non-woven fabric is placed on the side around the legs that touches the skin.
A composite material is used in which a polyethylene sheet, which is thinner than 1 and is soft, is attached so as to be wrapped inside.
In this case, the polyethylene sheet of the composite sheet has a thickness of 5
The thickness of the non-woven fabric is 10 to 25 μm or more and 20 μm or less
Must be g / m ² .

The polyethylene sheet and the non-woven fabric composite sheet may be attached by a composite sheet in which a polyethylene film is attached to the entire inner surface of the non-woven fabric, or a part of the non-woven fabric may be left to leave the base end of the three-dimensional gather. It may be any of composite sheets in which the film is laminated over the free edges. The laminating method may be any of an extrusion laminating method, a dry laminating method, pressure melting adhesion by hot embossing, bonding with a hot melt adhesive, ultrasonic bonding and the like.

The joint between the absorbent main body 9 and the exterior member 18 is
This is performed in the bonding area 25 provided on the outermost layer sheet in the central area in the longitudinal direction of the exterior member 18. Also, the adhesion area 2
5 may be provided in the vicinity of the central side end of the side seat 16 arranged on the outermost layer seat 24.

FIG. 8 is a cross-sectional view of the elastic ribbon 5 cut in the widthwise direction. The elastic ribbon 5 is folded into two sheets at the central portion along the longitudinal direction of one strip-shaped sheet 20 as a fold line, and the waist is provided in a predetermined region on the fold line side. The elastic member 21 is sandwiched between the strip-shaped sheets 20 in an expanded state, and the strip-shaped sheets 20 facing each other are joined to each other to form a stretchable elastic region 22.

The elastic region 22 on the opposite side of the broken line
The regions other than the above form a non-bonding region without bonding the strip-shaped sheets 20 facing each other, and bond the bonded laminated body formed by the absorbent main body 9 and the exterior member 18 in the non-bonding region so as to sandwich it. Elastic ribbon holding joint area 1
7 is assumed. Further, at least two or more sheets may be arranged to face each other, and a waist elastic elastic member may be disposed therebetween to bond a predetermined area between the sheets to form an elastic elastic area. The waist elastic member 21 is usually made of a thread-shaped elastomer, but may be used in any shape such as a flat shape or a film shape.

9 to 11 show the case where the elastic ribbon 5 is attached to the diaper body 26, and the elastic ribbon 5 is cut in the vicinity of the joint portion of the elastic ribbon 5 along the lines A, B and C in FIG. A cross-sectional view is shown. FIG. 9 is a cross-sectional view taken along the line A in FIG.
Thus, the diaper body 26 including the absorbent body 9 and the exterior member 18 is joined with the diaper body 26 sandwiched therebetween. As shown in FIG. 9, both ends in the longitudinal direction of the laminated body including the three-dimensional gather folded-back portions 19 formed on both side edges of the absorbent main body 9 are enclosed by the sandwiching joint regions 17.

FIG. 10 is a cross-sectional view taken along the line B in FIG. 2, in which the elastic ribbon 5 is joined by the holding and joining region 17 with the absorbent main body 9 and the diaper body 26 including the exterior member 18 sandwiched therebetween. . As shown in FIG. 10, both ends in the longitudinal direction of the diaper body 26 are enclosed by the sandwiching joint region 17. Further, FIG. 11 is a cross-sectional view taken along the line C of FIG. 2, in which the elastic ribbon 5 is joined by the holding and joining region 17 with only the exterior member 18 sandwiched. As shown in FIG. 11, both ends in the longitudinal direction of the exterior member 18 are enclosed by the sandwiching joint region 17.

9 to 11, in the sandwiching and joining region 17 of the elastic ribbon 5, the waist provided in the stretchable elastic region 22 between the elastic ribbon 5 and the diaper body 26 at both longitudinal edge portions of the diaper body 26. Surrounding elastic member 2
A stretchable elastic member may be provided separately from 1.

FIG. 12 is an exploded perspective view showing another example of the joint area between the absorbent main body 9 and the exterior member 18 shown in FIG. As shown in FIG. 12, the absorbent main body 9 is joined by the adhesive layer 25 disposed on the outermost layer sheet 24 in the central region in the longitudinal direction of the exterior member 18 to form the diaper main body 26. It is not necessary to bond the entire surface of the absorbent main body 9 to the bonding area, and as shown in FIG. 12, only at least one straight line portion connecting both longitudinal ends of the absorbent main body 9 is sufficient. It is rather preferable that the widthwise both side edges of 9 are in a non-bonded state because the absorbent body has good adhesion and conformability to the body when worn.

FIG. 13 shows another embodiment different from FIG.
3 is a cross-sectional view taken along the line XX ′ in FIG. 3, in which the three-dimensional gathers 13 are formed of a liquid-impermeable composite sheet 11 ′ different from the material forming the absorbent main body 9, and one side edge thereof is formed. Is joined to the back sheet 11 at the side edge of the absorbent main body 9.

In the present invention, as the top sheet 10 of the absorbent main body 9, a liquid permeable non-woven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester or other thermoplastic resin is used.
When the three-dimensional gather 13 is formed by the side edge portions of 0, it is preferable that only the both side edge portions be subjected to hydrophobic processing or be liquid impermeable in order to enhance the effect of preventing leakage. Alternatively, the three-dimensional gathers 13 may be formed by using a liquid-impermeable non-woven fabric and attaching them separately to both side edges of the absorbent main body 9.

The back sheet 11 is formed of a liquid impermeable polyethylene sheet, preferably a polyethylene sheet having micropores, a moisture impermeable liquid impermeable sheet obtained by adding a filler to a thermoplastic resin and stretching. By giving moisture permeability, there is no fear of getting stuffy and it becomes more comfortable. The thickness of the back sheet 11 is preferably 20 to 40 μm.

The absorbent body 12 is preferably made by using fluff pulp as a main material together with a super-absorbent polymer. Besides, absorbent paper alone or a mixture or laminate of heat-sealing fibers is used, and the whole is wrapped in tissue. A laminated structure is preferable. The shape of the absorber 12 may be an hourglass shape or a rectangular shape, but the hourglass shape provides better fit.

In addition to the three-dimensional gather elastic member 14 disposed at the top end of the three-dimensional gather 13, the leg opening elastic member 15 and the waist opening elastic member 21 are made of urethane film, urethane thread, urethane foam, thread rubber. You can use the elastic elastic body used for normal diapers such as etc. as it is, and these elastic elastic members are arranged in the three-dimensional gather part, leg opening, waist opening, respectively in the extended state, It is adhesively fixed with a hot melt adhesive or the like.

When the side flaps 4 of the exterior member 18 are made to be stretchable, the side sheet 16 is made of a stretchable elastic nonwoven web alone or an elastomer nonwoven web made of polyethylene terephthalate fiber on at least one side. Polyester fiber, polyolefin fiber,
Hydro-entangled or laminated webs of fiber layers made of materials selected from the group including polyamide fibers such as nylon fibers, cellulosic fibers such as cotton fibers, pulp fibers and mixtures thereof are used.
Further, the fiber layer is hydroentangled or laminated on the elastomer nonwoven web on at least one side of a sheet having a moisture permeability and elasticity of 5 μm to 40 μm, such as a polyurethane-based film, a natural rubber sheet, and a foamed sheet. It may be a web or a laminated or laminated hydro-entangled non-woven fabric. In order to prevent stuffiness, it is preferably liquid impermeable and moisture permeable.

The laminating and laminating are carried out by bonding with a hot melt adhesive. The application method of the hot melt adhesive is not particularly limited as long as it is a commonly used method such as bead, spiral, melt blow, etc., but the effect of the adhesive on elasticity is reduced, and the texture of the sheet after lamination is good. In order to achieve this, it is desirable that the amount of the adhesive used is as small as possible and that the adhesive is uniformly applied to the entire application surface, and application by melt blow is more preferred. Adhesion by melt blow is used throughout the process of manufacturing diapers.

The outermost layer sheet 24 is preferably liquid impermeable and breathable, and has excellent texture such as touch, and has water repellency so as to prevent oozing of excrement, particularly urine. Is desirable. As the outermost layer sheet 24, a card made of polypropylene, polyester, polyethylene or the like, which is generally used for diapers, or a nonwoven fabric such as spunbond is used. In addition, it is preferable that it has a good texture such as touch, and a polyester fiber such as polyethylene terephthalate fiber, a polyolefin fiber, a polyamide fiber such as nylon fiber, a cellulose fiber such as cotton fiber, a pulp fiber and a mixture thereof are included. A non-woven fabric or the like obtained by hydroentangling a fiber layer made of a selected material is used. Outermost layer sheet 2
4 is attached to the side sheet 16 so as to sandwich the leg-opening / extending elastic member 15 to form the exterior member 18, but at least both side regions where the elastic side sheet is laminated have the elastic elasticity of the side sheet. In order not to inhibit, it is necessary to have the property of elongating when a tensile force acts, but when released from the tensile force, it is not necessary to have the property of contracting in order to return to the original state due to the elasticity of the side sheet 16.

In the case of giving stretchability to the entire surface of the exterior member, the side sheet 16 having the stretch elasticity shown in the example of the stretchable diaper for the side flap 4 is the outermost layer sheet 2.
4 and the side sheet 16 may be formed of the outermost sheet 24 having no elasticity.
In this case, generally, a stretchable material is more expensive than a non-stretchable material and thus costs more, but it is possible to provide a diaper having a better fit.

A non-woven fabric made of synthetic fiber made of polyethylene, polypropylene, polyester or other thermoplastic resin is used for the belt-like sheet 20 forming the elastic ribbon 5, in order to improve the fit around the waist when it is worn. It is desirable that the nonwoven fabric is relatively bulky and excellent in flexibility. In addition, the width of the elastic elastic region of the elastic ribbon 5 is preferably 5 to 50 mm, preferably about 20 to 30 mm, and when the width is 5 mm or less, the area in which the elastic ribbon 5 contacts the skin is too small and the elastic elastic member contracts. The tightening pressure becomes large and marks are easily left on the skin, which is not preferable. Also, if the width is 50 mm or more, it is not preferable because it is too wide and does not look good and may be folded inward during wearing. The width of the non-bonding region 23 of the elastic ribbon 5 may be such that the adhesive strength between the elastic ribbon 5, the absorbent main body 9 and the laminated body of the exterior member 18 can be sufficiently obtained. 5 to 20 when joining with an adhesive
mm is good.

In the above-mentioned embodiment, the three-dimensional pants-type diaper was shown in advance, but the present invention provides the side flaps 4 with the fastening means without adhesively closing the side seams 8 and when the diaper is used, It can also be applied to a diaper having a shape to be worn by fixing the front body 6 and the back body 7 of the diaper with the fastening means.

[0050]

According to the pants-type disposable diaper of the present invention, since the central region in the longitudinal direction of the exterior member has air permeability and the both regions in the longitudinal direction have moisture permeability, it does not get stuffy while wearing the diaper. , Does not cause discomfort to the wearer. Also,
Since the absorbent main body is joined to the exterior member via the adhesive region provided in the longitudinal center region of the exterior member, the texture of the exterior member is not deteriorated, and the three-dimensional shape of the absorbent main body is further achieved. Since the rise of the free edge of the gather is not hindered and the wearer's movement is always followed, it is possible to provide a diaper having a good feeling of use without leakage.

A stretchable region in which a stretchable elastic member is disposed in a stretched state in a predetermined region in the waist opening of the diaper,
An elastic ribbon having an absorptive main body and a sandwiching joining region attached so as to sandwich both longitudinal edges of the diaper body formed by overlapping and joining the exterior member, and an elastic ribbon of the exterior member constituting the diaper body. Since the side flaps that have are attached in a stretched state by sandwiching and joining are attached, the side flaps with elastic elasticity of the exterior member expand when the diaper is attached and detached, and the waist opening is enlarged so that it can be easily attached and detached. It can be unfolded, and the side flap portions are in a tension state when worn, so that the absorbent main body can be held without causing slippage after wearing.

As described above, the disposable diaper according to the present invention is provided with an absorbent main body which prevents stuffiness and leakage and has an excellent touch, and has elastic elasticity for holding the absorbent main body on the wearer's body. By joining the air-permeable, moisture-permeable, liquid-impermeable outer packaging member having the above-mentioned characteristics, it is possible to provide a diaper that has good fit and is free from stuffiness and leakage.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pants-type disposable diaper of the present invention.

FIG. 2 is a perspective view in which the side seams of the pants-type diaper of FIG. 1 are opened and the elastic elastic members are free.

FIG. 3 is an exploded perspective view of an absorbent main body and an exterior member of a diaper main body that constitutes the pants-type diaper of FIG. 1.

FIG. 4 is a perspective view showing a laminated state of the absorbent main body and the exterior member of the diaper main body which constitutes the pants-type diaper of FIG. 1.

5 is a perspective view showing a state in which both widthwise ends of the diaper body of FIG. 4 are extended.

6 is a perspective view showing a state in which an elastic ribbon is attached to the diaper body of FIG.

FIG. 7 is a cross-sectional view showing a state in which the diaper of FIG. 2 is cut along line XX ′.

FIG. 8 is a sectional view of an elastic ribbon.

9 is a cross-sectional view taken along the line A of the pants-type diaper of FIG.

10 is a cross-sectional view taken along the line B of the pants-type diaper of FIG.

11 is a cross-sectional view taken along the line C of the pants-type diaper of FIG.

FIG. 12 is an exploded perspective view of an absorbent main body and an exterior member constituting a diaper main body, which is another example different from FIG.

13 is a cross-sectional view of the diaper of FIG. 2 showing another example different from that of FIG.
Sectional drawing which shows the state cut | disconnected by the X'line.

[Explanation of symbols]

 1: Used diaper 2: Opening around waist 3: Opening around leg 4: Side flaps 5: Elastic ribbon 6: Front body 7: Back body 8: Side seam 9: Absorbent body 10: Liquid permeable top sheet 11: Liquid impermeable back sheet 11 ': Liquid impermeable composite sheet 12: Absorbent 13: Three-dimensional gather 14: Three-dimensional gather elastic elastic member 15: Leg elastic elastic member 16: Side sheet 17: Clamping joint area 18: Exterior member 19: Three-dimensional gather folded portion 20: Belt-shaped sheet 21: Waist-opening elastic elastic member 22: Elastic elastic region 24: Outermost layer sheet 25: Linear adhesive area between external member and absorbent body 26: Diaper body

Claims (5)

[Claims] 1. An absorbent main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the both sheets, and the absorbent main body is joined at least at a part thereof. An outer member that surrounds the waist from the belly of the wearer and holds the absorbent body against the wearer when the wearer wears the waist, and joins the opposite side edges of the front body and the back body of the outer member. In a pants-type disposable diaper in which a stretchable elastic member is arranged along the waist opening and the pair of leg openings to form a circumference opening and a pair of leg openings, wherein the exterior member is It is composed of an outermost layer sheet having a width wider than the width of the absorbent main body and a pair of side sheets, and the central region along the longitudinal direction at which the absorbent main body of the outermost layer sheet is arranged is the outermost layer sheet. Only The pair of side sheets, on the outermost layer sheet, is arranged over the vicinity of a central region along the longitudinal direction which is the position where the absorbent main body is arranged from the side edge of the outermost layer sheet, And the portion where the side sheet is arranged on the outermost layer sheet is formed as a side flap portion having elastic elasticity, at the position of the pair of leg surrounding openings of the side flap portion of the exterior member, A leg-opening elastic member is arranged along the leg-opening between the outermost layer sheet and the side sheet, and elastic ribbons are provided in the waist-opening in both longitudinal edges of the diaper. A pants-type diaper that is attached so as to wrap around a portion and has an opening around the waist that has elastic elasticity. 2. The pants-type disposable diaper according to claim 1, wherein both side regions of the exterior member have moisture permeability. 3. The absorbent body is bonded to the exterior member via an adhesive region provided on the outermost layer sheet in the central region in the longitudinal direction of the exterior member. Pants-type diaper using the described pants. 4. The underpants type wearer according to claim 1, wherein the absorbent main body has liquid impermeable three-dimensional gathers standing up by elastic elastic members on both sides of the absorbent main body. Suede diaper. 5. The underpants type disposable diaper according to claim 1, wherein the outermost layer sheet is liquid impermeable and breathable.