JPH08215245A - Disposable diaper - Google Patents

Abstract

PURPOSE: To obtain a disposable diaper with a better touch in wearing eliminating steaming and spillage of excrements by forming a solid gather on both side rims across the width of the body of an absorbent using a composite sheet comprising a water impermeable sheet and unwoven cloth separate from a top sheet and a back sheet. CONSTITUTION: A shorts type disposable diaper has an opening part surrounding a waist and opening parts surrounding legs and front and rear panels formed between the left and right openings surrounding the legs are piled one upon the other through a crotch part of an exterior member 18 with an absorbing body 9 inside and closed being bonded by side seams 8.... The absorbing body 9 is so formed to have solid gathers 13 and 13 in which a composite sheet comprising a water impermeable sheet 11 with a thickness of 5-20μm and unwoven cloth 10 with weight of 10-25g/m<2> is folded back on an absorbent 12 and both side rim bonded parts 19 folded back ... are joined thereon while stretchable elastic members 14 and 14 are attached on a free rim of a non-joint part. The absorbing body is joined on the exterior member 18 through a bonded area 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper for infants or incontinence.

[0002]

2. Description of the Related Art In a used incontinence protector or diaper, an elastic member is attached to an outer edge of a flap extending outward from both lateral edges of an absorbent body, the flap is folded back to the upper surface, and the folded portion is folded. Japanese Patent Publication No. 3-57782 discloses a structure in which both longitudinal ends are joined to each other and pockets for receiving excrement are provided on both lateral sides. An absorbent article in which the flap is formed of a breathable waterproof sheet separate from the top sheet and the back sheet is disclosed in Japanese Utility Model Publication No. 4-33848. Further, a diaper in which an absorbent main body (insert structure) is attached to a stretchable non-woven exterior member (outer cover) so as not to restrict the stretchability of the exterior member is disclosed in Japanese Patent Publication No. 1-503473. ing.

[0003]

[Patent Document 1] Japanese Patent Publication No. 3-577
The used incontinence protector, diaper, etc. described in Japanese Patent Publication No. 82 did not have a perfect feeling of use such as leakage of excrement and touch. Further, since the flap is formed by a back sheet that extends to the outside of the absorbent body, if a plastic sheet is used as the back sheet, the plastic sheet directly touches the skin, so the touch is not good, and in order to improve the touch, Even when a non-woven fabric sheet or the like is combined with a plastic sheet, the plastic sheet must be strong enough to withstand the intense movement of the user, and the plastic sheet becomes stiff and gives discomfort. In addition, it has neither breathability nor moisture permeability, and no measures have been taken to prevent stuffiness.

Further, in an absorbent article in which the flap disclosed in Japanese Utility Model Publication No. 4-33848 is composed of a sheet having a ventilation and waterproof property which is separate from the top sheet and the back sheet, the flap portion is prevented from getting stuffy. However, since the back sheet that occupies a large area in the absorbent article is not made, the preventive effect is not sufficient.

Further, since a non-woven fabric or the like is used to provide air permeability, the waterproof effect is insufficient, and no improvement has been made regarding leakage. In addition, when a breathable film is used, the film strength is generally lower than a non-breathable film, so it is necessary to make the film thicker to maintain the same film strength. It is stiff and gives discomfort to the user.

In a diaper in which an absorbent main body is attached to a stretchable non-woven exterior member described in Japanese Patent Publication No. 1-503473, the stretchable area is not impaired by reducing the adhesive area to be attached. However, in a wearer with a large amount of exercise, the absorbent main body is displaced in the exterior member, which leads to leakage of excrement. SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems with conventional diapers for use and to provide a diaper for use that does not leak excrement and is comfortable to wear and has no stuffiness.

[0007]

A diaper for use according to the present invention is a thickness different from the top sheet and the back sheet on both side edges of the absorbent main body in the width direction and is thinner than the back sheet, soft, and comfortable to touch. By using a composite sheet consisting of a water-impermeable sheet of 5 to 20 μm in size and a non-woven fabric with a basis weight of 10 to 25 g / m ² , a three-dimensional gather is formed in which the outer layer touching the user's skin is a non-woven fabric, and the back sheet is also permeable The above object was achieved by using a wet sheet.

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 absorber interposed between the both sheets.
The absorbent main body is joined, and comprises an exterior member that surrounds the waist of the wearer from the belly of the wearer and holds the absorbent main body against the wearer when the wearer wears the waist periphery of the exterior member and a pair of legs. In a disposable diaper in which a stretchable elastic member is arranged along at least a part of the portion, the absorbent main body has a water-impermeable sheet having a thickness of 5 to 20 μm and a basis weight of 10 to 10.
A composite sheet made of a non-woven fabric of 25 g / m ² is extended outward from both side edges in the longitudinal direction of the absorbent body, folded back onto the absorbent body to join both longitudinal ends of the folded portion, and to the free edge of the non-joined portion. It has a three-dimensional gather formed by providing a stretchable elastic member, and is further joined to the exterior member via an adhesive region provided in the longitudinal central region of the exterior member. .

Further, the disposable diaper of the present invention is characterized in that the exterior member is made of a non-stretchable sheet, and the exterior member is made up of a waist portion and legs of the non-stretchable sheet. It is characterized in that a plurality of stretchable elastic members are arranged in an extended state at positions corresponding to the waist of the wearer, excluding the surrounding portion.

The diaper for use according to the present invention is characterized in that the exterior member has a side flap having elastic elasticity in the width direction of the diaper, and the exterior member is the width of the diaper. It is characterized by having elastic elasticity in the direction.

[0011]

In the disposable diaper of the present invention having the above-mentioned structure, the liquid impermeable three-dimensional gather of the absorbent main body stands up at the central portion in the longitudinal direction thereof to seal the body of the diaper and the three-dimensional shape of the body. A pouch is formed between the free edge of the gather and the proximal end to prevent leakage. In addition, the liquid impermeable solid gather is thinner than the back sheet, uses a soft impermeable sheet on the inside, and is formed of a composite sheet using a nonwoven fabric on the outside that touches the wearer's skin, so it has a good feel And does not make the wearer feel uncomfortable.

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 rise of the free edge of the three-dimensional gather of the main body is not hindered and the wearer's movements are always followed, it is possible to provide a diaper with a good usability that does not cause leakage. In addition, a generally inexpensive non-stretchable sheet can be used as an exterior member to provide a diaper at a low cost, and a non-stretchable sheet having a plurality of stretchable elastic members can be used to fit the wearer. Can be improved. Furthermore, by using a sheet having elastic elasticity as the exterior member, it is possible to fit around the waist like a supporter and obtain a better usability.

[0013]

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 of the present invention in which an exterior member is made of a non-stretchable sheet, 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 leg openings 3, and an elastic ribbon 5 is attached to the waist opening 2 at an elastic ribbon holding portion 17. The front body 6 and the back body 7 formed between the left and right leg openings 3 are adhesively closed by side seams 8.

Adhesive closure of the side seam 8 is performed by stacking the front body 6 and the back body 7 through the crotch portion of the exterior member 18 so that the absorbent main body 9 is located inside, and protruding both side edges outward. Or with both side edges protruding inward, or with one side edge protruding outward and the other side edge protruding inward,
Along the outermost portions of both side edges, hot melt adhesive, pressure melting, ultrasonic melting, etc. are used alone or in combination to bond them.

FIG. 2 is a perspective view showing a state in which the side seam 8 of the pants-type diaper 1 of the present invention shown in FIG. 1 is unfolded and the elastic elastic member is free, and FIG. 3 is shown in FIG. FIG. 6 is a perspective view showing a state in which the stretchable elastic member is extended, in which the absorbent main body 9 and the exterior member 18 are joined to form a laminated body,
Further, the elastic ribbon 5 is attached around the waist at the elastic ribbon holding portion 17, and both side portions joined by the side seams 8 when mounted in the state of FIG. Each is shown, and leg elastic elastic members 15 are provided near the left and right leg openings 3.

Both ends in the longitudinal direction of the bonded laminate including both side edge adhesive portions 19 formed at both ends in the longitudinal direction of the bonded laminate of the absorbent main body 9 and the exterior member 18 are elastic ribbon holding portions 1 at both ends.
Since it is covered so as to be sandwiched by 7, the fitting property of the elastic ribbon peripheral portion which adheres to the waist circumference when worn is good, and the both side edge adhesive portions 19 are overlapped with the material forming the three-dimensional gather 13 to form a convex shape. Even if the skin becomes loose or the texture is hardened, the strip-shaped sheet 20 continuous in the width direction is in contact with the skin, so that there is an effect that the wearer does not feel uncomfortable.

FIG. 4 is an exploded perspective view of the absorbent main body 9 and the exterior member 18 constituting the pants-type diaper of the present invention. As shown in FIG. 4, the absorptive main body 9 is joined at the adhesive region 26 provided in the central region in the longitudinal direction of the exterior member 18. It is not necessary to bond the entire surface of the absorbent main body to the adhesive area 26, and only the linear portions provided near the both side edges in the longitudinal direction of the absorbent main body 9 are sufficient, and the central area in the longitudinal direction of the absorbent main body 9 is in an unbonded state. It is rather preferable that the above is because the absorbent main body has good adhesion and conformability to the body when worn.

The above-mentioned joining is carried out by a hot melt adhesive in the bonding region 26 provided in the central region in the longitudinal direction of the outermost layer sheet 24 where there is no side sheet except the side edges of the side sheet 16. The application method of hot melt adhesive is
Any method such as beading, spiraling, and melt blowing may be used, but the texture of the sheet tends to be poor at the position where the adhesive is applied, so it is preferable to minimize the adhesion area. Although FIG. 4 shows an example in which the two linear bonding regions 26 are bonded by the bead method, the bonding may be performed with two or more bonding regions as long as the texture of the sheet is not deteriorated.

In FIG. 4, the absorbent main body 9 is composed of a liquid-permeable top sheet 10, a liquid-impermeable back sheet 11, an absorbent body 12, and elastic elastic members 14. A gather 13 is formed. Further, as shown in FIG. 4, in order to form the three-dimensional gathers 13, both side edge adhesive portions 19 are formed on both side edges in the vicinity of both longitudinal end portions of the absorbent main body 9, and the both side edge adhesive portions 19 are the top sheet 10. , The back sheet 11, the stretchable elastic member 14, and an adhesive (not shown) for adhering and fixing them, and the like are superposed portions.

The exterior member 18 has leg elastic elastic members 15 arranged in an extended state on both side edges of the central region in the width direction of the diaper to which the absorbent main body 9 on the non-stretchable outermost sheet 24 is joined. A pair of side seats 16 is arranged so as to be sandwiched between them. At this time, the leg elastic elastic member 15
Is placed at least in the crotch part of the diaper, but to improve the fit, prevent leakage, etc., for the wearer to wear comfortably,
It is preferable that gathers are present around the entire circumference of the leg, and it is desirable that the gather be curved along the opening around the leg.

Further, the state of the pair of left and right side seams 8 facing each other of the front body 6 and the back body 7 which are joined and fixed when forming a pants-type diaper is the outermost sheet 2.
The four sheets may be bonded to each other, or the side sheets 16 may be bonded to each other in a state where the side sheet 16 is laminated on the outermost layer sheet 24. In addition, the side sheets 16 are not present on both side edges of the outermost layer sheet 24, and a sealing sheet 23 having a good sealing property such as polyethylene which is a separate body from the both sheets is laminated and the sheets are adhered to each other. It may be. In any of the above cases, in consideration of the efficiency of adhesive fixation, the front body 6 is inserted through the crotch portion of the exterior member 18 so that the absorber is inside.
It is recommended that the rear body 7 be overlapped with each other and that both side edges be joined to each other while protruding outward.

Here, as the top sheet 10, a liquid permeable non-woven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, or other thermoplastic resin is used, and the three-dimensional gathers 13 are formed by the side edges of the top sheet 10. Therefore, in order to enhance the effect of preventing leakage, it is preferable that only the both side edge portions be subjected to hydrophobic processing or be liquid impermeable. 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 made of a liquid impermeable polyethylene sheet, preferably a polyethylene sheet having micropores, and a moisture impermeable liquid impermeable sheet formed by adding a filler to a thermoplastic resin and stretching. When moisturized, it is more comfortable because there is no need to worry about getting stuffy. The thickness of the back sheet 11 is preferably 20 to 40 μm.

The absorbent body 12 is preferably made of fluff pulp as a main material together with a super-absorbent polymer. In addition to this, absorbent paper alone or a mixture or laminate of heat-sealing fibers is used. Further, it is preferable to have a laminated structure in which the whole is wrapped with tissue. 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 stretchable elastic member 14 arranged at the top end of the three-dimensional gather 13, a leg-opening stretchable elastic member 15,
As the elastic member 21 around the waist, a stretchable elastic member such as a urethane film, a urethane thread, a urethane foam, or a rubber thread used in a normal diaper can be used as it is, and each of these stretchable elastic members is in a stretched state. It is placed in the three-dimensional gather portion, the leg opening, and the waist opening, and is fixed by adhesion with a hot melt adhesive.

As the non-stretchable 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. Also, a fibrous layer made from a group of selected materials including polyester fibers such as polyethylene terephthalate fibers, polyolefin fibers, polyamide fibers such as nylon fibers, cellulose fibers such as cotton fibers, pulp fibers and mixtures thereof may be streamed. The nonwoven fabric obtained by the entanglement has a good texture such as touch.

In order to impart leakproofness to the non-stretchable outermost layer sheet 24, a polyethylene sheet, preferably a polyethylene sheet having micropores, is added to the inner surface of the nonwoven fabric, and a filler is added to the thermoplastic resin. The moisture-impermeable liquid impermeable sheet that has been stretched may be laminated and laminated with a hot melt adhesive or the like to form the outermost composite sheet.

The hot-melt adhesive may be applied by any method commonly used such as beads, spirals and melt-blowing, but the influence of the adhesive on the stretchability is reduced and the texture of the sheets after lamination is improved. In order to be good, 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. The melt-blown adhesion is used in various places in the process of manufacturing a diaper, in addition to laminating composite sheets. The side sheet 16 is made of the same non-woven fabric as the outermost layer sheet 24.

FIG. 5 is a 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 the side edges of the non-stretchable outermost sheet 24. Leg elastic elastic members 15 are attached between the seats. Moreover, since the three-dimensional gathers 13 are in direct contact with the wearer's skin, they are thin and separate from the material forming the absorbent main body 9,
It is desirable that it is made of a liquid impermeable composite sheet 11 ′ that is soft and has a good feel, and is attached to the side edge portion of the absorbent main body 9. At this time, the liquid impermeable composite sheet 11 ′ forming 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.

As the liquid impermeable composite sheet 11 'constituting the three-dimensional gathers 13, the liquid impermeable back sheet 11 is so arranged that the non-woven fabric for improving the touch is arranged on the side of the legs which comes into contact with the skin. A composite sheet is used in which a polyethylene sheet, which is thinner and softer than the other, is attached so as to wrap it inside. In this case, the polyethylene sheet of the composite sheet needs to have a thickness of 5 to 20 μm and the basis weight of the nonwoven fabric to be 10 to 25 g / m ² .

The polyethylene sheet and the composite sheet composed of the non-woven fabric may be laminated to each other by a polyethylene sheet laminated on 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 13. It may be any of composite sheets in which the film is laminated from the part to the free edge. 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.

FIG. 6 is a transverse cross-sectional view of the elastic ribbon 5 taken along a plane perpendicular to the longitudinal direction. The strip-shaped sheet 20 is folded at the center portion in the width direction into two folding lines, and a waist is formed in a predetermined region on the folding line side. The stretchable elastic member 21 is sandwiched between the strip-shaped sheets 20 in the stretched state, and the strip-shaped sheets 2 face each other.
The stretchable elastic region 22 is formed by joining 0s. Also,
The region on the opposite side of the fold line where the elastic member is not attached forms the non-bonding region 28 without bonding the facing strip-shaped sheets 20, and the non-bonding region 28 is formed by the absorbent main body 9 and the exterior member 18. The elastic ribbon holding portion 17 is formed by sandwiching and bonding the bonded laminated body. Alternatively, at least two or more sheets may be arranged to face each other, the waist elastic elastic member 21 may be disposed between them, and a predetermined region between the sheets may be bonded to form the elastic elastic region 22. In FIG. 6, the elastic member 2 around the waist is elastic.
Although 1 uses a thread-like elastomer, the shape thereof may be a flat shape, a film shape, or the like regardless of the shape.

FIG. 7 is a sectional view taken along the line A in FIG. The elastic ribbon 5 is joined by the elastic ribbon holding portion 17 while sandwiching the laminated body of the exterior member 18 and the absorbent main body 9. As shown in FIG. 7, both ends in the longitudinal direction of the laminate are enclosed by elastic ribbon holding portions 17. In the elastic ribbon sandwiching portion 17 for joining the elastic ribbon 5 to the laminated body formed by the absorbent main body 9 and the exterior member 18, the elastic ribbon 5 is formed at both longitudinal end portions of the laminated body.
An elastic elastic member may be provided between the laminated body and the laminated body in addition to the waist elastic elastic member 21 provided in the elastic region 22.

The strip-shaped sheet 20 forming the elastic ribbon 5 is made of polyethylene, polypropylene, polyester,
Although a non-woven fabric made of synthetic fiber made of other thermoplastic resin is used, it is preferable that the non-woven fabric is relatively bulky and excellent in flexibility in order to enhance the fit around the waist during wearing. In addition, the elastic elastic region 2 of the elastic ribbon 5
The width of 2 is 5 to 50 mm, preferably about 20 to 30 mm, and if the width is less than 5 mm, the area in which the elastic ribbon 5 contacts the skin is too small, and the tightening pressure due to the contraction of the elastic elastic member increases and the It is not preferable because marks are likely to form. Also, if the width is wider than 50 mm, it is too wide and looks unpleasant, and it may be folded inward during wearing, which may cause leakage, which is not preferable. The width of the non-bonding region 28 forming the sandwiching portion 17 of the elastic ribbon 5 should be such that the adhesive strength of the laminated body of the elastic ribbon 5, the absorbent main body 9 and the exterior member 18 can be sufficiently obtained. It's good, but when joining with hot melt adhesive, it is 5-2
About 0 mm is good.

In the above embodiment, the three-dimensional pants-type diaper was shown in advance, but the side flaps 4 were provided with fastening means without adhering and closing the side seams 8 and the diaper was fastened by the fastening means. The shape may be such that the front body 6 and the back body 7 of the diaper are attached and fixed to each other.

In the above embodiment, the outer diaper 18 is a disposable diaper which is made of a non-stretchable sheet. However, as shown in FIG. A plurality of waist elastic elastic members 27 are disposed substantially in parallel with the waist elastic elastic member 21 at a position corresponding to the waist, and the elasticity is imparted by bonding and fixing with a hot melt adhesive. Then, the fit from the waist part to the leg part is improved. In this case, a stretchable elastic member such as a urethane film, a urethane foam, a urethane thread, or a rubber thread, which is used in a normal diaper, is stretched on the non-stretchable outermost layer sheet 24 (nonwoven fabric) in a stretched state. The same non-woven fabric, polyethylene film and the like are laminated and laminated so as to sandwich the stretchable elastic member.

The stretchable elastic member arranged in the stretched state contracts in the free state and gathers the exterior member 18 and the absorbent main body 9. The absorbent main body 9 is a laminated body containing a bulky absorber. , It doesn't gather nicely and looks bad. Therefore, tension control is performed depending on the arrangement position of the elastic elastic member, and at the position where the absorbent main body 9 is joined, the elastic elastic member is arranged without being stretched.
At the position where the absorbent main body 9 is joined, the hot-melt adhesive for adhering and fixing the stretchable elastic member is not applied, but the stretchable elastic member is arranged in an expanded state, and then the stretchable elastic member is cut to cut the hotmelt adhesive. It is preferable that the stretchable elastic member is contracted at a position where no is present so that the elastic member does not exist.

When the side flap portion 4 of the exterior member 18 is to be stretched, as shown in FIG. 9, the side sheet 16 'having stretchability is used as the side sheet 16. Side laminating sheet 16 'having stretch elasticity
Is a non-stretchable stretched sheet laminated with an elastomeric nonwoven web alone or a non-stretchable stretched sheet obtained by hydroentangling that stretches when a tensile force acts but does not shrink even when released from the tensile force. A laminated sheet or the like is used.

The stretched sheet is made from a group of selected materials including polyester fibers such as polyethylene terephthalate fibers, polyolefin fibers, polyamide fibers such as nylon fibers, cellulose fibers such as cotton fibers, pulp fibers and mixtures thereof. It is obtained by hydroentangling the produced fiber layer. The elastic sheet is 5-4
A moisture-permeable and stretchable polyurethane film having a thickness of 0 μm, a natural rubber sheet, a foamed sheet, or the like is used.

The laminated lamination of the stretchable sheet and the stretchable sheet forming the laminated sheet is adhered by a hot melt adhesive. The application method of hot melt adhesive is bead,
Any method may be used as long as it is a commonly used method such as spiral or melt blow, but in order to reduce the influence of the adhesive on the elasticity and the texture of the sheet after bonding is good, the amount of the adhesive used is It is desirable that the amount is as small as possible and that the entire surface to be coated is uniformly coated, and coating by melt blow is more preferable. The adhesion by melt blow is used in various places in the process of manufacturing a diaper, in addition to laminating the laminating sheets.

The side-bonding sheet 16 ', which has elasticity when the diaper is attached and detached, is stretched, but when the wearer, especially an infant, wears the diaper by himself, the diaper can be stretched to a size that can be worn with a small force. It is important that the side-bonded sheet 16 'has an elastic stress at the time of 50% lateral extension of 300 g / 25 mm width or less, and a recovery rate at the time of stress relaxation of 80% or more.

Since the outermost layer sheet 24 is preferably one having a good texture such as touch, polyester fiber such as polyethylene terephthalate fiber, polyolefin fiber,
A non-woven fabric obtained by hydroentangling a fiber layer made of a group-selected material including polyamide fiber such as nylon fiber, cellulose fiber such as cotton fiber, pulp fiber and a mixture thereof is used. The outermost layer sheet 24 is laminated with the side laminating sheet 16 ′ so as to sandwich the leg elastic elastic member 15 to form the exterior member 18, and a tensile force acts so as not to hinder the elastic elasticity of the laminated sheet. However, the outermost sheet 24 does not need to have the property of contracting because it returns to its original state due to the elasticity of the side laminated sheet 16 'when released from the pulling force. The elastic stress at this time is preferably 200 g / 25 mm width or less.

As shown in FIG. 9, in the constitution of the exterior member 18, in order to supplement the sheet strength in the region where the absorbent main body 9 at the center portion in the width direction of the diaper on the outermost layer sheet 24 (extended sheet) is joined and fixed. The intermediate sheet 25 is disposed in the. The intermediate sheet 25 is 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, and imparts moisture permeability. Then you don't have to worry about getting stuffy and you're more comfortable. Further, in order to maintain a good texture such as the feel of the diaper, the thickness of the intermediate sheet 25 is 20 to
It is preferably 40 μm.

The leg elastic elastic members 15 are arranged so as to be sandwiched between the side bonding sheets 16 ′ on both sides of the intermediate sheet 25 and the outermost layer sheet 24. At this time, the leg elastic elastic members 15 are disposed at least in the crotch portion of the diaper, but in order to improve the fit and to prevent the wearer from wearing comfortably, there is gather around the leg. It is preferable that the side bonding sheet 16 ′ which is curved along the opening around the leg and is elastic, and the elastic elastic member 15 around the leg form a gather around the leg by the exterior member 18. Is desirable.

Considering that the wearer, especially an infant, wears the diaper by himself / herself, the fact that it is easy to put on and take off is an important factor. In addition, it is desirable that the exterior member 18 that holds the absorbent main body 9 is in close contact with the wearer, especially around the waist and the side around the waist, in order to prevent the diaper from slipping off when worn, and in that it looks good. In consideration of these matters, when the exterior member 18 has elasticity, in order to effectively develop the elasticity, when laminating both ends in the longitudinal direction of the laminate with the elastic ribbon holding portions 17, When the gathers are formed by sandwiching both side edges of the body exterior member 18 in the longitudinal direction in a stretched state, the degree of freedom of elasticity around the waist is increased and the waist opening is apt to expand widely, so that the diaper can be easily put on and taken off.

In the case of a disposable diaper having elasticity on the entire surface of the exterior member 18, as shown in FIG. 10, the outermost sheet 24, which is an elastic diaper, is attached to the side flap 4 as a side laminated sheet. 16 'is replaced with a stretchable outermost sheet 24', and the side laminated sheet 1
6'is replaced by the outermost layer sheet 24 and the side sheet 16
And the configuration. In that case, the intermediate sheet 25 provided on the outermost layer sheet 24 does not have to exist. In this case, generally, a stretchable material is more expensive than a non-stretchable material and therefore costs more, but it is possible to provide a diaper having a better fit.

[0047]

INDUSTRIAL APPLICABILITY As described above, in the disposable diaper according to the present invention, the absorbent body which prevents stuffiness and leakage and has an excellent touch is provided with the exterior member for holding the absorbent body on the wearer's body. By joining the diapers, it is possible to provide a diaper having a good fit.

[Brief description of drawings]

FIG. 1 is a perspective view of a disposable diaper according to the present invention.

FIG. 2 is a perspective view in which the side seam of FIG. 1 is opened and the elastic elastic member is free.

FIG. 3 is a perspective view of the stretchable elastic member of FIG. 2 in a stretched state.

FIG. 4 is an exploded perspective view of an absorbent main body and an exterior member.

5 is a cross-sectional view taken along line X-X ′ of FIG.

FIG. 6 is a cross-sectional view of the elastic ribbon cut along a plane perpendicular to the longitudinal direction.

7 is a transverse cross-sectional view of the elastic ribbon of the disposable diaper shown in FIG. 2 taken along a point A in the vicinity of the bonded portion and taken along a plane perpendicular to the longitudinal direction of the elastic ribbon.

FIG. 8 is a perspective view of a diaper in which a non-stretchable outermost sheet is provided with a stretchable elastic member in a stretched state to give stretchability to the outer layer member.

FIG. 9 is a cross-sectional view of a disposable diaper according to another embodiment of the present invention.

FIG. 10 is a cross-sectional view of a diaper having elastic elasticity in the width direction of the diaper.

[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 backsheet 11 ': Liquid-impermeable composite sheet 12: Absorber 13: Solid gather 14: Solid gather elastic elastic member 15: Leg elastic elastic member 16: Side sheet 16': Side pasting Laminated sheet 17: Elastic ribbon sandwiching portion 18: Exterior member 19: Adhesive portions on both sides 20: Band-shaped sheet 21: Elastic elastic member around waist 22: Elastic elastic region 23: Sealing sheet 24: Outermost layer sheet 24 ': Elastic maximum Outer layer sheet 25: Intermediate sheet 26: Linear adhesive area between the exterior member and the absorbent body 27: Waist circumference elastic member 28: Non-bonded area

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Ken Niimi 1-10-6 Shinonome, Koto-ku, Tokyo Shinoji Paper Manufacturing Co., Ltd. Tokyo Commodity Research Institute

Claims (5)

[Claims] 1. An absorbent main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body interposed between the both sheets, and the absorbent main body is joined to the wearer's body when worn. An exterior member that surrounds the abdomen from the waist and holds the absorbent main body against the wearer and holds the elastic body along at least a part of the waist portion and the pair of leg portions of the exterior member. In the installed disposable diaper, the absorbent main body is a composite sheet made of a water-impermeable sheet having a thickness of 5 to 20 μm and a non-woven fabric having a basis weight of 10 to 25 g / m ² , which is outside from both longitudinal edges of the absorbent body. To the absorber, fold it back on the absorber and join both ends of the fold back in the longitudinal direction,
Further, it has a three-dimensional gather formed by providing a stretchable elastic member at the free edge of the non-joint portion, and is joined to the exterior member via an adhesive region provided in the central region in the longitudinal direction of the exterior member. A disposable diaper characterized by that. 2. The diaper for use according to claim 1, wherein the exterior member is made of a non-stretchable sheet. 3. A plurality of elastic elastic members are arranged in a stretched state at a position corresponding to the waist of the wearer excluding the waist portion and leg portions of the non-stretchable sheet. The disposable diaper according to claim 2, wherein: 4. The disposable diaper according to claim 1, wherein the exterior member has a side flap having elastic elasticity in the width direction of the diaper. 5. The disposable diaper according to claim 1, wherein the exterior member has elastic elasticity in the width direction of the diaper.