JP2012245216A - Underpants type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily pull up a diaper to an appropriate position when putting on the diaper even though it is longitudinally and laterally stretchable and allows a wearing feeling like that of underwear.SOLUTION: An underpants type disposable diaper 1 includes an exterior sheet 20 comprising a stretchable nonwoven fabric, a right side seal part 21 and a left side seal part 21 are formed by the welding of the material of the exterior sheet 20, and by the side seal parts 21, a longitudinal non-stretchable area 31 is formed continuously extending from an edge part 23 of a waist opening to a leg opening edge 29. Also, on the exterior sheet 20 for both of a front part F and a back part B, leg periphery non-stretchable areas 32 are formed respectively continuously extending, from the lower end part of the right side seal part 21 to the right side edge part of an interior body 10 along a right leg opening edge 29 and from the lower end part of the left side seal part 21 to the left side edge part of the interior body 10 along a left leg opening edge 29.

Description

  The present invention relates to a pants-type disposable diaper having an exterior sheet having both fit, thinness and flexibility.

  The pants-type disposable diaper includes an exterior sheet having a front body and a back body, and an interior body including an absorbent body fixed to the inner surface of the exterior sheet, and the front body and the back body of the exterior sheet are on both sides. By joining and forming a side seal portion, a waist opening and a pair of left and right leg openings are formed.

  In a pants-type disposable diaper, in order to improve fit to the body, an elongated elastic member such as thread rubber is fixed to the exterior sheet in an expanded state, and among them, a waist edge elastic member And it is common to provide a waist lower elastic member (for example, refer to patent documents 1). 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.

  On the other hand, a general pants-type disposable diaper using such an elongated elastic member has a problem that it has a comfort and appearance remarkably different from ordinary underwear, and the shape of a diaper made of moco moco is outer ( As a solution to this problem, the exterior sheet is made up of a stretchable sheet that elastically stretches vertically and horizontally with the material itself, such as stretchable nonwoven fabric. It has also been proposed to do.

  However, when the entire exterior sheet is stretchable in the vertical direction, there is a problem that when the diaper is worn, it is difficult to pull up the crotch side to an appropriate position. In particular, the crotch portion is likely to be pulled up insufficiently, and in such an insufficient state, there is a risk of causing so-called side leakage. In addition, such an inadequate wearing state can be resolved by lifting the diaper by grasping the waist edge of the diaper or the vicinity thereof, and then picking and lifting the appropriate part such as the edge of the leg opening or the crotch. Can be done, but the work becomes complicated.

JP 2006-043415 A JP 2007-97621 A JP 2008-253289 A JP 2002-209942 A Japanese Patent Laid-Open No. 2005-087622

  Therefore, a main problem of the present invention is a pants-type disposable diaper that can be stretched vertically and horizontally and can be easily worn like an underwear, but can easily pull up the diaper to an appropriate position when wearing the diaper. It is to provide.

  As a result of earnest research on the above-mentioned problems, the present inventor pulled up the diaper by grasping the waist edge of the diaper or the vicinity thereof, and finally lifted the crotch part of the diaper between the wearer's crotch. Even if force is applied strongly, as shown by the arrow in the left figure of FIG. 9, the crotch side part (especially the leg opening and its vicinity when the side seal part does not expand or contract in the vertical direction) is vertical. The present invention has been made by obtaining the knowledge that the diaper's crotch part does not have a sufficient pulling force and as a result the pulling is insufficient. . That is, the present invention that has solved the above problems is as follows.

<Invention of Claim 1>
An exterior sheet that forms a front body and a back body, and an interior body that includes an absorbent body that is fixed to a region including a crotch portion on the inner surface of the exterior sheet, both sides of the exterior sheet in the front body and the back body In the pants-type disposable diaper in which the waist opening and the pair of left and right leg openings are formed by joining the both sides of the exterior sheet in and forming the side seal part,
The exterior sheet is formed of a material that elastically expands and contracts vertically and horizontally without an elastic member added,
In the exterior sheet in at least one of the front body and the back body,
It extends continuously or intermittently from the edge of the waist opening or the vicinity thereof to the edge of the leg opening or the vicinity thereof in each of the right side seal part or the vicinity thereof and the left side seal part or the vicinity thereof. , Vertical non-stretchable area,
From the right vertical non-stretchable region or the vicinity thereof to the right edge of the inner body along the edge of the right leg opening or the vicinity thereof, and the left vertical non-stretchable region or the vicinity thereof to the edge of the left leg opening A non-stretchable region around the leg that extends continuously or intermittently to the left edge of the interior body or the vicinity thereof,
A pants-type disposable diaper characterized by that.

(Function and effect)
The diaper of the present invention is formed of a material whose exterior sheet is elastically stretched vertically and horizontally, and provides comfort such as underwear. When holding the part and pulling it up, the force is firmly transmitted to the interior body through the longitudinal non-stretchable region and the leg non-stretchable region in order, so that a sufficient lifting force can be applied to the crotch part of the diaper. Can be more easily pulled up to the proper position.
The “non-stretchable region” in the present invention means a region having a strength at 10% elongation of 1.0 kgf / 50 mm or more in the dry tensile strength measurement specified in JIS P 8116 (2000). .

<Invention of Claim 2>
The leg-around non-stretchable region is formed by attaching a non-stretchable sheet to the region with a hot melt adhesive,
The side seal portion is formed by welding the material of the exterior sheet, the side seal portion constitutes the vertical non-stretchable region, and the vertical non-stretchable region other than the side seal portion is not present. Item 1. A pants-type disposable diaper according to item 1.

(Function and effect)
As a method of providing the non-stretchable region, it is conceivable to fix a non-stretchable member in the target region or to perform processing (for example, heat sealing, heat embossing, ultrasonic sealing, etc.) that involves melting and solidifying the material. In pants-type disposable diapers, it is common to adopt a method of material sealing such as heat sealing for the side seal part, and the side seal part formed in this way has lost its elasticity. When the vertical non-stretchable region is formed using this as described above, there is an advantage that the stretchability of the exterior sheet can be left in a wider range. On the other hand, the non-stretchable region around the leg can also be formed by using a process involving melting and solidification of the material, but it is hard to apply it to a portion corresponding to the wearer's leg. Therefore, it is preferable to attach a non-stretchable sheet with a hot-melt adhesive for the non-stretchable region around the legs.

<Invention of Claim 3>
A plurality of waist edge elastic members extending in the width direction are provided in parallel at intervals in the vertical direction at the edge of the waist opening in the exterior sheet of the front body and the edge of the waist opening in the exterior sheet of the back body. And
Other than the fixed region of the interior body in the exterior sheet, no elastic member other than the waist edge elastic member is provided,
The pant tie ◇ disposable diaper according to claim 1 or 2.

(Function and effect)
If the entire exterior sheet can be expanded and contracted in the vertical direction, the crotch portion may slip downward from the appropriate position during wearing of the diaper. In particular, if there is an increase in the weight of the crotch due to the absorption of excreta, it tends to slip off, causing so-called side leakage.
On the other hand, when the waist edge elastic member is provided as described above in the present invention and the waist edge of the diaper is firmly tightened against the waist of the wearer (especially the upper side of the iliac bone), Since the interior body is supported by being supported by the waist edge portion through the vertical non-stretchable region and the leg mating non-stretchable region, it is difficult for sliding during wearing.

<Invention of Claim 4>
The outer sheet is made of a stretchable nonwoven fabric having a basis weight of 10 to 100 g / m ^2, pants-type disposable diaper according to any one of claims 1 to 3.

(Function and effect)
Stretch nonwoven fabric is a very preferable material because it not only elastically stretches vertically and horizontally but also has a soft touch, but it is a relatively weak material, so if you form an exterior sheet with this alone, it will pull up strongly when wearing diapers And the exterior sheet (particularly in the vicinity of the leg opening) extends beyond the elastic limit in the vertical direction and may be broken in the worst case. However, since the longitudinal non-stretchable region and the leg non-stretchable region are provided in the present invention as described above, such a problem hardly occurs even when the stretchable nonwoven fabric is used, and the advantage of the stretchable nonwoven fabric is impaired. It will not be.

  As described above, according to the present invention, the diaper can be pulled up to an appropriate position more easily when wearing a diaper while being able to stretch in the vertical and horizontal directions and obtaining comfort like underwear. Etc. are brought about.

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 top view (outer surface side) of the underpants type disposable diaper of a deployment state. It is CC sectional drawing of FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a top view (outer 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 comparison figure of a wearing state of a pants type disposable diaper concerning the present invention, and a comparative example.

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%.
1-9 has shown the underpants type disposable diaper 1 of embodiment. The pants-type disposable diaper 1 (hereinafter also simply referred to as a diaper) is fixed and integrated with an exterior sheet 20 that forms a front body F and a back body B, a crotch portion on the inner surface of the exterior sheet 20, and both front and rear sides thereof. The interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 and a liquid-impermeable back sheet 12. In manufacturing, after the back surface of the interior body 10 is fixed to the inner surface (upper surface) of the exterior sheet 20 by a joining means such as a hot melt adhesive G, the interior body 10 and the exterior sheet 20 are the front body F and the back body. Folded at the center in the longitudinal direction (front-rear direction), which is the boundary of B, and both side portions thereof are joined to each other by processing (for example, heat sealing, ultrasonic sealing, etc.) accompanied by melting and solidification of the material to form the side seal portion 21 By doing this, it becomes a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed.

(Structural example of interior body)
As shown in FIGS. 4 to 6, the interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 made of a nonwoven fabric or the like and a liquid-impermeable back side sheet 12 made of polyethylene or the like. The excretory fluid that has permeated through the top sheet 11 is absorbed and retained.

  As the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable surface sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid permeable top sheet 11 is wound around the side edge of the absorber 13 and extends to the back side of the absorber 13.

  As the liquid-impermeable back sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13, a liquid-impermeable plastic sheet such as polyethylene or polypropylene is used. Those having wettability are preferably used. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there.

  Absorbent body 13 is a known one, for example, a pulp fiber stack, a filament aggregate such as cellulose acetate, or a non-woven fabric, mixed with a superabsorbent polymer as necessary, fixed, etc. In the example shown in the figure, a shape formed with a substantially rectangular planar shape is used, and the width dimension is a dimension width that does not give the wearer a feeling of goreness by hitting the crotch part. The absorbent body 13 can be packaged with a wrapping sheet 14 having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer. The shape of the absorber 13 may be a rectangular shape as shown in the figure, or may be an hourglass shape (constricted shape) in which the width of the crotch portion is narrower than the back side and the abdominal side.

  It is preferable that solid gather BSs that fit around the legs are formed on both sides of the interior body 10. This three-dimensional gather BS is formed by a gather sheet 15 made of a water-repellent nonwoven fabric or the like. As the gather sheet 15, as shown in FIG. 5 and FIG. 6, a nonwoven fabric made into a double sheet by folding is preferably used. The side edge portion of the absorber 13 wound by the liquid-permeable surface sheet 11 is further wound from the upper side to extend to the back surface side of the absorber 13 and bonded thereto. More specifically, the gather sheet 15 has a three-dimensional gather BS forming portion left in the middle portion in the longitudinal direction of the diaper 1 and a range extending from the middle portion in the width direction to the back side of the absorbent body 13 is bonded by a hot melt adhesive or the like. Further, at the longitudinal front and rear end portions, the section from the width direction intermediate portion to the one side end edge is bonded in a range extending to the back surface side of the absorber 13, and a portion forming the three-dimensional gather BS is attached to the absorber 13 It is bonded with a hot melt adhesive or the like while being folded at the upper surface.

  A plurality of gather elastic members 16 are disposed at the standing tip side portion in the gather sheet 15 formed of the double sheet nonwoven fabric. 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 back side sheet 12 enters the inside of the double sheet-like gather sheet 15, and constitutes a leak-proof wall on the lower end side of the three-dimensional gather BS as shown in FIG. . As the liquid-impermeable back side sheet 12, it is desirable to use an opaque sheet so that brown such as defecation and urine does not appear. As the opacification, a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used.

  As the gather elastic member 16, a thread-like material such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, or the like that is usually used can be used. Moreover, in order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the elongation is 150 to 350%, and the interval is 7.0 mm or less. The gather elastic member 16 may be a tape-like elastic member having a certain width.

  In the same manner as the liquid-permeable surface sheet 11, the material fiber constituting the gather sheet 15 is made of synthetic fibers such as polyethylene or polypropylene such as olefin, polyester or amide, recycled fibers such as rayon or cupra, and cotton. Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a nonwoven fabric that suppresses the basis weight and has excellent air permeability. Furthermore, for the gather sheet 15, in order to prevent the transmission of urine and the like, to prevent fogging, and to improve the touch to the skin (dry feeling), silicon-based, paraffin metal-based, alkylchromic chromoid-based water repellent, etc. It is desirable to use a water-repellent non-woven fabric coated with.

(Structural example of exterior sheet 20)
As shown in FIGS. 4 to 6, the exterior sheet 20 is a two-layer structure sheet in which an inner layer 20 </ b> A and an outer layer 20 </ b> B made of a material that elastically expands and contracts vertically and horizontally are bonded together by a hot melt adhesive. Yes. Of course, a part or all of the exterior sheet 20 may have a single layer structure.

  The planar shape of the illustrated exterior sheet 20 has a pseudo hourglass shape as a whole due to the concave leg opening edges 29 (edges of the leg opening parts) 29 formed to form leg openings on both sides of the middle. However, other suitable shapes can be used. In particular, the exterior sheet 20 constituting the front body F and the exterior sheet 20 constituting the back body B can be provided separately, and both can be joined or separated at the crotch portion.

As the material of the exterior sheet 20 (in the case of the illustrated form, the inner layer 20A and the outer layer 20B), a stretchable nonwoven fabric is suitable, but a sheet provided with a fiber layer on the front and back surfaces of the rubber sheet as long as it elastically stretches vertically and horizontally, etc. Other materials can also be used. The material of the exterior sheet 20 is preferably one that extends about 1.5 to 3 times in the vertical and horizontal directions. The tensile strength in the vertical direction and the tensile strength in the horizontal direction (for a sample with a width of 40 mm from the non-extended state to the vertical direction). Or the thing of about 2-6 N / 40mm is preferable for the tensile strength when it extends | stretches to the length of 2 times in the horizontal direction at the extension speed of 300 mm / min. The fiber basis weight of the stretchable nonwoven fabric is 10 to 100 g / m ² approximately, particularly preferably has a 18~50g / m ^2, the thickness T0 at a pressure 0.5 g / cm ² is at 0.1~1.0mm Is preferred. Although known specifications can be adopted for the fineness and fiber length of the stretchable nonwoven fabric, the fineness is preferably 0.7 to 3 dtex, particularly 1 to 2.5 dtex. Although the manufacturing method of an elastic nonwoven fabric is not specifically limited, The thing by the air through method, the spun bond method, and the spunlace method is preferable. The stretchable nonwoven fabric can be used alone, or a plurality of stretched nonwoven fabrics can be used.

  In particular, in the illustrated exterior sheet 20, as shown in FIGS. 1 and 2, waist edge elastic members 24 along the width direction are provided on the edge 23 of each waist opening of the front body F and the back body B. A plurality of diapers are fixed in a state of extending in the width direction in parallel with a space in the vertical direction, and the waist edge elastic member 24 supports the waist of the diaper against the waist of the wearer (particularly the upper side of the iliac bone). The edge is firmly tightened. As the elastic elastic member 24 at the waist edge, a rubber thread having a thickness of 155 to 1880 dtex, particularly about 940 to 1240 dtex (in the case of synthetic rubber, having an equivalent SS curve in the case of natural rubber) is 1 to 5 mm. It is preferable to fix at an interval of 5 to 10 at an elongation of 200 to 350%, particularly about 250 to 300%.

  In the illustrated embodiment, the exterior sheet 20 is not provided with an elastic member other than the waist edge elastic member 24, but other elastic members are added to the fixing region of the interior body 10, or other than the fixing region of the interior body 10. Other elastic members along the width direction can be added. As these additional elastic members (including the waist edge elastic member 24), synthetic rubber or natural rubber formed into an elongated shape such as a thread shape, a string shape, or a belt shape can be used. These additional elastic members, like the illustrated waist edge elastic member 24, are fixed in an extended state between the nonwoven fabrics of the folded portion 20C formed by folding the outer layer 20B to the inner surface side at the waist opening edge. It is also possible to sandwich and fix other parts such as between the inner layer 20A and the outer layer 20B in an extended state.

(Non-stretchable area)
Characteristically, in the form shown in FIGS. 1 and 2, the right side seal portion 21 and the left side seal portion 21 are formed by welding the material of the exterior sheet 20. A vertical non-stretchable region 31 that extends continuously from the edge 23 of the opening to the leg opening edge 29 is formed. Further, the exterior sheet 20 in both the front body F and the back body B is applied to the right side edge of the interior body 10 along the right leg opening edge 29 from the lower end portion of the right side seal portion 21 and the left side seal. A leg non-stretchable region 32 extending continuously from the lower end of the portion 21 to the left edge of the interior body 10 along the left leg opening edge 29 is formed. The longitudinal length d1 of the leg non-stretchable region 32 and the width d2 of the vertical non-stretchable region 31 can be determined as appropriate, but the vertical length d1 of the leg non-stretchable region 32 is about 5 to 50 mm. The width d2 of the vertical non-stretchable region 31 is preferably less than 20 mm.

  Therefore, when putting on the diaper, if the ends of the left and right vertical non-stretchable regions 31 are gripped and pulled up, the force is shown in the right diagram of FIG. Since it is transmitted to the interior body 10 through the surrounding non-stretchable region 32 in order, a sufficient lifting force can be applied to the crotch portion of the diaper, and the diaper can be pulled up to the appropriate position more easily. Further, in this embodiment, the waist edge of the diaper is firmly tightened against the wearer's waist (particularly the upper side of the iliac bone) by the waist edge elastic member 24, and the right side of FIG. As shown by the dotted line, the interior body 10 is supported by being suspended through the longitudinal non-stretchable region 31 and the leg non-stretchable region with the waist edge as a support. It becomes difficult. In the illustrated embodiment, the non-stretchable region other than the vertical non-stretchable region 31 and the leg-around non-stretchable region 32 is only the fixed region of the interior body 10, and the other portions are due to the stretchability of the exterior sheet 20 in the vertical and horizontal directions. In the front body F, the lower abdomen bulges, and in the rear body B, the buttock bulges fit comfortably like underwear. In addition, when the stretchable nonwoven fabric is used as the exterior sheet 20, the stretchable nonwoven fabric is a relatively weak material. Therefore, if the stretchable nonwoven fabric is pulled up strongly when wearing a diaper, the vicinity of the leg opening of the exterior sheet 20 has a longitudinal elastic limit. There is a risk of breaking beyond and in the worst case breaking. However, as described above, when the longitudinal non-stretchable region and the leg-around non-stretchable region 32 are provided, such a problem hardly occurs even when the stretchable nonwoven fabric is used, and the advantage of the stretchable nonwoven fabric is impaired. There is no.

  As a method of providing the vertical non-stretchable region 31 and the leg non-stretchable region 32, a method of fixing a non-stretchable member such as a non-stretchable sheet 33 to the target region, or a process involving melting and solidification of a material (for example, heat sealing, heat embossing) , Ultrasonic seals, etc.). When the non-stretchable region is provided in the exterior sheet 20 by the non-stretchable member, the non-stretchable member is attached to the non-stretchable (non-stretched natural state) exterior sheet 20 by pasting the non-stretchable member. The attachment area becomes a non-stretchable area.

  The non-stretchable member is not particularly limited as long as it is not a material that elastically stretches and contracts like the exterior sheet 20, for example, a plastic sheet such as polyethylene or polypropylene, various non-stretchable non-woven fabrics such as spunbond nonwoven fabric and air-through non-woven fabric, and non-stretchable yarn A non-stretchable string or the like can be used, and in the case of a sheet, it can be used with a large number of holes for breathability or without a hole. When the non-stretchable region is provided in the exterior sheet 20 by the non-stretchable sheet 33, when the exterior sheet 20 has a two-layer structure of the inner layer 20A and the outer layer 20B, the front and back surfaces thereof are formed between the layers. The non-stretchable sheet 33 can be attached to any one surface.

  In the pants-type disposable diaper 1, it is common to adopt a method of material sealing such as heat sealing for the side seal portion 21, and the side seal portion 21 formed in this way loses stretchability. Therefore, when the longitudinal non-stretchable region 31 is formed using this as shown in FIGS. 1 and 2, there is an advantage that the stretchability of the exterior sheet 20 can be left in a wider range.

  The pants-type disposable diaper 1 may have a structure in which the side seal portion 21 is joined by a mechanical fastener (surface fastener) and the side seal portion 21 is peeled off as necessary (not shown). Since hook tape (male material) and loop tape (female material) of ordinary mechanical fasteners are non-stretchable members that do not have stretchability, the side seal portion 21 to which these are fixed also loses stretchability and is not vertically stretchable. Region 31 is formed. Therefore, also in this case, the stretchability of the exterior sheet 20 can be left in a wider range without providing the separate vertical non-stretchable region 31.

  On the other hand, the non-stretchable region 32 around the leg can also be formed by using a process that involves melting and solidifying the material. However, since it becomes hard, it is not preferable to apply it to a portion that hits the wearer's leg. Therefore, for the non-stretchable region 32 around the legs, it is preferable that the non-stretchable sheet 33 is attached to the exterior sheet 20 with a hot melt adhesive as shown in FIGS. Of course, as shown in FIG. 7, a vertical non-stretchable region 31 can be formed in the vicinity of the side seal portion 21 separately from the side seal portion 21. 1 and FIG. 2 and the embodiment shown in FIG. 7, the longitudinal non-stretchable region 31 and the leg non-stretchable region 32 extend continuously. However, as shown in FIG. The stretchable region 31 and the leg-surround non-stretchable region 32 (only one of them) may be arranged at an appropriate interval of about 5 to 10 mm (in the case of the longitudinal non-stretchable region 31, it means a longitudinal interval. In this case, it can be extended intermittently with a gap in the width direction).

  On the other hand, in the above example, the leg-around non-stretchable region 32 and the vertical non-stretchable region 31 are formed in both the front body F and the back body B. However, as shown in FIG. The leg non-stretchable region 32 and the vertical non-stretchable region 31 are formed only in either one (the front body F in the illustrated example), and the other is not formed with any non-stretchable region other than the side seal portion and the interior fixing region. It is also possible.

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

  DESCRIPTION OF SYMBOLS 1 ... Pants type disposable diaper, 10 ... Interior body, 11 ... Liquid permeable surface sheet, 12 ... Liquid impervious back side sheet, 13 ... Absorber, 14 ... Packaging sheet, 15 ... Gather sheet, 16 ... Gather elastic member 20 ... exterior sheet, 20A ... inner layer, 20B ... outer layer, 21 ... side seal part, 24 ... waist edge elastic member, 29 ... leg opening edge, 20C ... exterior sheet folded part, 31 ... longitudinal non-stretchable region, 32 ... Leg non-stretchable region, 33 ... Non-stretchable sheet, F ... Front body, B ... Back body, BS ... Three-dimensional gather.

Claims (4)

An exterior sheet that forms a front body and a back body, and an interior body that includes an absorbent body that is fixed to a region including a crotch portion on the inner surface of the exterior sheet, both sides of the exterior sheet in the front body and the back body In the pants-type disposable diaper in which the waist opening and the pair of left and right leg openings are formed by joining the both sides of the exterior sheet in and forming the side seal part,
The exterior sheet is formed of a material that elastically expands and contracts vertically and horizontally without an elastic member added,
In the exterior sheet in at least one of the front body and the back body,
It extends continuously or intermittently from the edge of the waist opening or the vicinity thereof to the edge of the leg opening or the vicinity thereof in each of the right side seal part or the vicinity thereof and the left side seal part or the vicinity thereof. , Vertical non-stretchable area,
From the right vertical non-stretchable region or the vicinity thereof to the right edge of the inner body along the edge of the right leg opening or the vicinity thereof, and the left vertical non-stretchable region or the vicinity thereof to the edge of the left leg opening A non-stretchable region around the leg that extends continuously or intermittently to the left edge of the interior body or the vicinity thereof,
A pants-type disposable diaper characterized by that. The leg-around non-stretchable region is formed by attaching a non-stretchable sheet to the region with a hot melt adhesive,
The side seal portion is formed by welding the material of the exterior sheet, the side seal portion constitutes the vertical non-stretchable region, and the vertical non-stretchable region other than the side seal portion is not present. Item 1. A pants-type disposable diaper according to item 1. A plurality of waist edge elastic members extending in the width direction are provided in parallel at intervals in the vertical direction at the edge of the waist opening in the exterior sheet of the front body and the edge of the waist opening in the exterior sheet of the back body. And
Other than the fixed region of the interior body in the exterior sheet, no elastic member other than the waist edge elastic member is provided,
The pants-type disposable diaper according to claim 1 or 2. The outer sheet is made of a stretchable nonwoven fabric having a basis weight of 10 to 100 g / m ^2, pants-type disposable diaper according to any one of claims 1 to 3.

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