JP5479831B2 - Tape type disposable diaper - Google Patents

Description

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

A tape-type disposable diaper is a crotch part that is defined as a front-rear direction range in which both side edges form a constricted curve shape along the leg circumference, and a part that extends to the front and rear sides of this crotch part, and both side edges are front and rear Fastening tapes that are detachably connected to the other part protrude from the abdominal waist part and the back waist part that form a straight line along the direction, and from both sides in the width direction of the back side waist part. It is what. The longitudinal length of the crotch is about 30 to 50% of the total length of the diaper, and the vertical length of the back side of the waist is about 25 to 35% of the total length of the diaper. The horizontal length of the diaper is generally about 50 to 100% of the total length of the diaper.
On the other hand, fastening tapes with a narrow width (length in the longitudinal direction) were the mainstream, but the purpose was to disperse the tightening with the tape and to fit the surface shape over a wide area and to improve strength and durability. In order to make the back side part and the wearer's waist elastically fit, a thing with a fastening panel about 20 to 35% of the total length of the diaper has been proposed. It has also been proposed to configure the fastening panel as an expansion / contraction part that elastically expands and contracts in the direction around the trunk (see Patent Document 1).

JP 2009-72472 A

However, in a conventional tape-type disposable diaper equipped with a fastening panel, when a fastening panel that elastically expands and contracts in the waistline direction is used, the fastening panel rolls up at the part along the root groove of the thigh. The connection part may come off (peel) when the force acts on the connection part.
Therefore, a main problem of the present invention is to prevent the lower end portion of the fastening panel from being bent and the connecting portion from being detached (peeled).

The present invention that has solved the above-described problems and the effects thereof are as follows.
<Invention of Claim 1>
The crotch part, which is defined as a front-rear direction range in which both side edges form a constricted curve shape around the leg,
A part extending to the front side and the rear side of the crotch part, and both side edges form a straight shape along the front-rear direction;
A fastening panel that is protruded from both sides in the width direction in the back side waistline portion, and that is configured as an expansion / contraction portion that at least a lower part elastically expands and contracts in the waist circumference direction,
In a tape-type disposable diaper having a connecting part that is detachably connected to the outer surface of the front part of the diaper in the front-rear direction center provided at the tip part of at least the lower part of each fastening panel;
The longitudinal length of the crotch is 30-50% of the total length of the diaper,
The longitudinal length of the back waistline portion is 25 to 35% of the total length of the diaper,
The lateral length of the back waistline portion is 45 to 70% of the total length of the diaper,
The longitudinal length of the fastening panel is 20 to 35% of the total length of the diaper,
And the lower edge of the diaper of the fastening panel, the distance between the front-rear direction center of the diaper, Ri 15-28% der of the total length of the diaper,
The fastening panel has an upper panel and a lower panel that are cut and separated in advance or can be separated by a perforation, and the connecting portion is provided at each tip of the upper panel and the lower panel. , the connecting portion to the tip portion of at least the lower panel on both sites of the lower end and an upper end that provided respectively,
A tape-type disposable diaper characterized by that.

(Function and effect)
In this way, when the fastening panel configured as an expansion / contraction part in which the longitudinal length is as wide as 30 to 50% of the total length of the diaper and at least the lower part elastically expands and contracts in the waist circumference direction, Since the separation distance between the lower edge of the diaper of the panel and the center of the diaper in the front-rear direction is 15 to 28% of the total length of the diaper, the fastening panel is difficult to overlap with the root groove of the thigh. The phenomenon that the fastening panel crawls up at the portion along the root groove of the thigh is less likely to occur. As a result, it is difficult for a situation in which the connecting portion is detached (peeled).
Further, in this way, if the fastening panel is made up and down in two stages, and the connecting portions are provided at both of the lower end portion and the upper end portion at least at the tip portion of the lower panel, the entire upper and lower direction of the lower panel is Since it is connected to the outer surface of the diaper, even if a force is applied so that the lower panel is rolled, it is difficult for the lower panel to be bent.

<Invention of Claim 2>
The fastening panel has an upper panel and a lower panel that are cut and separated in advance or can be separated by a perforation, and the connecting portion is provided at each tip of the upper panel and the lower panel. And
A front target tape for connecting the connection portion of the upper panel of the fastening panel is provided on the outer surface of the abdomen waist portion, and on the outer surface of the front portion of the crotch portion from the front-rear direction center of the diaper. A front target tape for connecting the connecting portion of the lower panel of the fastening panel is provided,
The tape-type disposable diaper according to claim 1.

(Function and effect)
In the present invention, since the position of the fastening panel is closer to the waist end portion, if the whole fastening panel is connected to the outer surface of the abdominal waistline portion as in the prior art, the sense of unity of the leg openings may be reduced. On the other hand, the fastening panel has two upper and lower tiers as described above, and the upper panel is connected to the outer surface of the abdominal waistline as in the conventional case, whereas the lower panel is different from the conventional one, and the diaper in the crotch part. If the lower panel is connected to the outer surface of the front side of the center in the front-rear direction, the lower panel extends along the base of the thigh, resulting in an increased sense of unity of the leg openings, and the lower panel is less likely to bend. Therefore, it is preferable.

  As described above, according to the present invention, it is possible to prevent the lower end portion of the fastening panel from being bent and the connecting portion from being disconnected.

It is a top view which shows the inner surface side of the expansion | deployment state of a tape type disposable diaper. It is a top view which shows the outer surface side of the expansion | deployment state of a tape type disposable diaper. It is iii-iii sectional drawing of FIG. It is iv-iv sectional drawing of FIG. It is VV sectional drawing of FIG. It is an enlarged view of a fixation panel part. It is an enlarged view of the other fastening panel part. It is an enlarged view of the other fastening panel part. It is a perspective view which shows the state in which the fastening panel in the conventional diaper was bent. It is a top view which shows the positional relationship of an absorber, a leg base elastic | stretch elastic member, and a leg periphery elastic | stretch elastic member. It is a top view which shows roughly the example of the attachment line of the elastic elastic member at the time of manufacturing a fixation panel. It is Vi-Vi sectional drawing of FIG. It is a photograph of the upper end part of the non-expanded fastening panel part in the prototype of the disposable diaper of the embodiment. It is a photograph of the upper end part of the extension panel part of the extension state in the prototype of the disposable diaper of an embodiment. It is a photograph which shows the state which made the dummy doll wear the prototype of the disposable diaper of embodiment. It is a photograph which shows the state which put the conventional disposable diaper on the dummy doll.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIGS. 1-6 has shown an example of the tape type disposable diaper which concerns on this invention, and this disposable diaper absorbs between the inner surface of the liquid-impermeable back sheet 1, and the liquid-permeable top sheet 2. FIG. It has a basic structure with a body 3 interposed.

(Absorber)
As the absorbent body 3, it is possible to use a laminate of pulp fibers, an aggregate of filaments such as cellulose acetate, or a nonwoven fabric, and a mixture obtained by mixing and fixing a superabsorbent polymer as necessary. . The absorber 3 has a single layer structure as well as a two-layer structure in which the upper layer absorber 3A having a smaller dimension than the lower layer absorber 3B is laminated on the surface side of the lower layer absorber 3B as shown in the figure. Can be adopted. Moreover, the absorber 3 can be wrapped with crepe paper (not shown) as needed. Moreover, the shape of the absorber 3 can be determined as appropriate, but in addition to the hourglass shape as illustrated, a shape that extends from the front side to the rear side of the crotch portion, such as a rectangle, is preferable. It is desirable that the basis weight of the absorbent body 3 is about 100 to 500 g / m ² and the thickness is about 1 to 15 mm. The basis weight of the highly water-absorbent resin is preferably about 0 to 300 g / m ² . If the content of the superabsorbent resin is too small, sufficient absorbability cannot be provided, and if it is too large, the entanglement between the pulp fibers is lost, and twisting or cracking is likely to occur.

(Back sheet)
The back sheet 1 extends outward from the periphery of the absorber 3 and blocks movement of excrement absorbed by the absorber 3 to the back side. As the back sheet 1, in addition to a plastic film such as a polyethylene film, a sheet having moisture permeability can be used without impairing water shielding from the viewpoint of preventing stuffiness. This water-impervious and moisture-permeable 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. Can be used. The weight per unit area of the backsheet 1 is preferably 13 to 40 g / m ² , and the thickness is preferably 0.01 to 0.1 mm.

  In order to make the outer surface of the diaper have a cloth-like appearance and feel, the entire back surface of the back sheet 1 is covered with an exterior sheet 12, and the outer peripheral edges of both sheets 1 and 12 extend to the outer peripheral edge of the diaper. Although various nonwoven fabrics can be used as the exterior sheet 12, a spunbond nonwoven fabric is preferable. The exterior sheet 12 can be omitted.

(Top sheet)
As the top sheet 2, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Moreover, as a processing method of a nonwoven fabric, well-known methods, such as the spunlace method, the spun bond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the point bond method, can be used. The basis weight of the nonwoven fabric used for the liquid-permeable top sheet 2 is preferably 15 to 30 g / m ² , and the thickness is preferably 0.05 to 1 mm.

  The top sheet 2 extends outward from the periphery of the absorber 3, and a portion extending outward from the side edge of the absorber 3 is fixed to the back sheet 1 by a hot melt adhesive or the like. In addition, the dot pattern in a figure represents the adhering part.

(Side barrier sheet)
As shown in FIGS. 3 and 4, the side barrier sheet is provided on both sides of the inner surface of the article (in the illustrated embodiment, the surface of the back sheet 1 extending from the side edge surface of the top sheet 2 to the side). 4 of the width direction outer side 4 is affixed over the whole front-back direction. As the side barrier sheet 4, various non-woven fabrics (preferably spunbond non-woven fabrics), plastic films similar to those used for the back sheet, or laminated sheets thereof can be used. In this respect, a nonwoven fabric subjected to a water repellent treatment is preferable. The portion 4c on the center side in the width direction of the side barrier sheet 4 is fixed to the inner surface of the article (the surface of the top sheet 2 in the illustrated embodiment) by means such as hot melt adhesive at both ends in the front-rear direction. The middle part is a non-fixed free part, and the elongated elastic elastic member 4G is stretched along the front-rear direction at the tip part (end part on the center side in the width direction in the unfolded state) of the free part. It is fixed with a hot melt adhesive or the like. In the illustrated example, a plurality of the elongated elastic elastic members 4G are provided with a predetermined interval, but one may be used. The elongated elastic elastic member 4G (same for other elongated elastic elastic members) includes natural rubber or synthetic rubber formed into a thread shape, string shape, belt shape, etc., specifically, styrene rubber, olefin rubber, urethane. Commonly used materials such as rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon and polyester can be used. As shown in FIG. 4, this free portion constitutes a side barrier that stands up with respect to the inner surface of the article (the surface of the top sheet 2 in the illustrated embodiment) as a result of the contraction force of the elongated elastic elastic member 4 </ b> G acting. The base end 4b of the standing portion is located at the boundary between the fixed portion 4x on the outer side in the width direction and the inner portion 4c in the side barrier sheet 4. In FIG. 1, the diagonally upward hatched portion indicates the fixing portion of the side barrier sheet 4, and the diagonally upward diagonal hatching portion indicates the fixed portion of the back barrier sheet 30 described later.

(Flap part and dimensions of each part)
At both ends in the front-rear direction of the disposable diaper 100, the back sheet 1, the exterior sheet 12, the liquid-permeable top sheet 2, and the side barrier sheet 4 are extended from the front and rear ends of the absorbent body 3 to the front and rear sides, respectively. An end flap portion EF that does not exist is formed. On the other hand, on the left and right sides of the disposable diaper 100, the back sheet 1, the exterior sheet 12, the liquid-permeable top sheet 2 and the side barrier sheet 4 are respectively extended from the side edges of the absorbent body 3 to the side. The side flap part which 3 does not exist is formed. Of the side flap portions, the portions located in the waist side portion of the abdominal side portion F and the waist side portion of the back side portion B are extended laterally from the intermediate portion therebetween, and these portions are It becomes the waist side flap part SF used as the waist part of a diaper.

Further, the disposable diaper 100 includes a crotch portion C in which both side edges (portions serving as edges of leg openings) Le are defined as a constricted curved shape along the leg circumference in the front-rear direction, and the front and rear sides of the crotch portion C Each of which has a ventral side waist portion TF and a back side waist portion TB in which both side edges are straight along the front-rear direction. Here, the tape type disposable diaper which this invention makes object has the following dimensional relationship.
Length of crotch in the vertical direction: 30 to 50% (preferably 34 to 46%) of the total length L of the diaper
Longitudinal length of the back trunk part TB: 25 to 35% (preferably 29 to 33%) of the total length L of the diaper
The lateral length W of the back trunk part TB: 45 to 70% (preferably 52 to 60%) of the total length L of the diaper
Vertical length 5Y of fastening panel described later: 15 to 28% (preferably 20 to 25%) of the total length L of the diaper
Moreover, what has the following dimensional relationship is suitable.
Longitudinal length of ventral waist part TB: 15 to 30% (particularly 20 to 24%) of the total length L of the diaper
The lateral length of the ventral trunk periphery TB: the same as the lateral length W of the dorsal trunk periphery TB.
The length of the protrusion 5e of the fastening panel described later: 10 to 30% (particularly 15 to 24%) of the total length L of the diaper

(Fastening panel)
A fastening panel 5 protruding from each side edge is attached to the back waistline TB, and a front target tape 6 is attached to the surface of the abdomen waistline TF along the width direction. When the diaper 100 is applied to the body, the fastening panels 5 on both sides are turned from each side of the waist to the ventral side outer surface and fastened to the front target tape 6. The front target tape 6 can be omitted. In this case, the fastening panel 5 is secured directly to the outer surface of the diaper (in the illustrated embodiment, the exterior sheet 12).

  The fixing panel 5 is a protrusion that protrudes outward in the width direction from between a sheet at a side edge of the back waistline portion TB and a fixing portion 5f that is fixed between sheets at the back waistline portion TB by means such as hot melt adhesive. The projecting portion 5e has a distal end portion 5p and a main body portion 5b closer to the proximal end than the distal end portion 5p. The upper part and the lower part (at least in the lower part) on the inner surface side (liquid permeable surface sheet 2 side) of the front end portion 5p of the fastening panel 5 are connected for connection with the target tape 6. The hook tape (male material of the mechanical fastener (surface fastener)) 9 and 9 having a large number of hook-like protrusions on the surface is attached as a part, and the hook-like protrusions are detachably hooked as the front target tape 6 (A female material of a mechanical fastener (surface fastener)) 6 is attached. The material of the outer surface of the diaper itself is used in place of the front target tape 6, or an adhesive layer is used in place of the hook tape 9, and a resin tape having a smooth adhesive surface is used as the front target tape 6. be able to.

  In particular, the fastening panel 5 in the illustrated form is fixed over the entire width direction (that is, over the fixing portion 5f, the main body portion 5b, and the tip portion 5p) and the entire width direction of the tip portion 5p of the basic sheet 51. In addition to the reinforcing sheet 52, a portion corresponding to the fixing portion 5 f of the basic sheet 51 is reinforced by folding back and bonding the sheets. The hook tape 9 that is a connecting portion is attached to the intermediate portion in the width direction of the reinforcing sheet 52. By reinforcing the fixing portion 5f and the tip portion 5p in this way, it is possible to ensure the strength and rigidity of the fixing portion 5f and the tip portion 5p, and to ensure flexibility and stretchability in the main body portion 5b. Further, on the inner surface side of the basic sheet 51, a presser sheet 53 is laminated from between the reinforcing sheet 52 and the basic sheet 51 at the front end portion 5p to between the opposed surfaces of the folded portion of the fixed portion 5f. Between the basic sheet 51, the elastic elastic member 20 is bonded and fixed with a hot melt adhesive or the like. As the elastic elastic member 20, a sheet-like member can be used in addition to the above-described elongated member.

Each of the sheets 51 to 53 can be formed of a single material, or can be formed by bonding a plurality of materials. Although the raw material of each sheet | seat 51-53 is not specifically limited, A nonwoven fabric is suitable. Any known nonwoven fabric can be used without any particular limitation. As fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Moreover, as a manufacturing method of a nonwoven fabric, well-known methods, such as the spunlace method, the spunbond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the point bond method, can be used. In particular, a spunbond nonwoven fabric and an SMS nonwoven fabric using olefin fibers are preferable. The basis weight of the nonwoven fabric to be used can be determined as appropriate, but the total basis weight of the nonwoven fabric in the main body portion 5b is 20 to 75 g / m ² , particularly 26 to 46 g / m ² , and the nonwoven fabric in the fixing portion 5f and the tip portion 5p. Are preferably 35 to 130 g / m ² , particularly 46 to 116 g / m ² . Moreover, it is preferable that each basic weight of the nonwoven fabric used for the basic sheet 51 and the pressing sheet 53 is about 15-25 g / m < ² >, and each basic weight of the nonwoven fabric used for the reinforcement sheet 52 is about 50-80 g / m < ² >. Is preferred. Within this range, ensuring the strength and rigidity of the fixing portion 5f and the tip portion 5p of the fastening panel 5 and ensuring the flexibility and stretchability of the main body portion 5b can be achieved in a balanced and effective manner. it can.

  The elongated elastic elastic member 20 is not particularly limited in its arrangement as long as it can apply an elastic force in the width direction to at least the lower part of the fastening panel 5, but in the example shown in FIG. To the front end 5p across the main body 5b. It is also possible to extend from the fixing portion 5f to the main body portion 5b. More specifically, the elastic elastic member 20 passes through the main body portion 5b from a position separated from the end of the fixing portion 5f opposite to the main body portion 5b side by a predetermined distance from the end portion 5p. It extends to a position closer to the main body 5b than the tape 9. Therefore, the elastic expansion / contraction member 20 does not extend from the end portion of the fixing portion 5f opposite to the main body portion 5b side and from the hook tape 9 to the tip end side portion. Of the elastic elastic member 20, the portion 21 located in the fixing portion 5f is bonded and fixed in its entirety in an unstretched state, and substantially the entire portion excluding both ends of the portion 22 located in the main body portion 5b extends in the width direction. In this state, the adhesive is fixed. Further, the portion 23 of the elastic expansion / contraction member 20 located at the tip 5p is also bonded and fixed in its entirety in a non-expanded state.

  By adopting such a structure, since the fixing portion 5f does not contract, adhesion to the sheet (the gather sheet 4 and the back sheet 1) sandwiching the fixing portion 5f is ensured, the adhesive strength is not reduced, and elastic expansion and contraction is achieved. Transmission of force between the member 20 and the fixed portion 5f becomes direct, and the shape followability of the diaper due to the expansion / contraction action of the elastic expansion / contraction member 20 is not impaired. Further, the elastically expanding / contracting portion can be provided up to the vicinity of the fixed portion 5f, and the expansion / contraction length can be easily secured. Furthermore, by not having the elastic elastic member 20 at the end of the fixing portion 5f opposite to the main body portion 5b, the end becomes flat and adheres well to the sheet sandwiching the fixing portion 5f. Excellent adhesion strength. Similarly to the fixing portion 5f, the portion 23 of the elastic expansion / contraction member 20 located at the distal end portion 5f is also bonded and fixed in a non-expanded state, and the distal end portion 5p does not contract, so that the reinforcing sheet 52 and the basic sheet 51 are It adheres well and the adhesive strength of the reinforcing sheet 52 does not decrease. Moreover, since the front-end | tip part of the elastic expansion-contraction member 20 overlaps with the reinforcement sheet | seat 52, the transmission of the force between the hook tape 9 and the elastic expansion-contraction member 20 becomes smooth, and the shape followability of the diaper by the expansion-contraction action of the elastic expansion-contraction member 20 is also good. It becomes hard to be damaged.

  When the elongated elastic elastic member 20 is used, it is preferable that a plurality of the elastic elastic members 20 are arranged in parallel in the vertical direction of the fastening panel 5 with a predetermined interval. Specifically, the number of elastic elastic members 20 is suitably about 8 to 100, especially about 25 to 50, and the interval is preferably about 2 to 25 mm, particularly about 3 to 7 mm. . The thickness of the elongated elastic elastic member 20 is about 300 to 3000 dtex, particularly about 400 to 1300 dtex, more preferably about 900 to 1300 dtex, and the expansion rate at the time of attachment is about 150 to 500%, In particular, it is preferably about 200 to 400%, more preferably about 300 to 400%. As shown in FIG. 7 and FIG. 8, an elongated elastic expansion and contraction is formed so as to form a wave shape extending in the vertical direction of the fastening panel 5 while reciprocating the fixing portion 5 f and the tip portion 5 p across the main body portion 5 b. The member 20 can also be arranged. As a specific wave arrangement, a triangular wave arrangement as shown in FIG. 7 can be adopted, and a wave arrangement including a straight portion 20s and a folded portion 20r along the width direction can be adopted as shown in FIG. it can. In the latter case, the linear portion is preferably provided so as to extend over the fixed portion 5f and the tip portion 5p, and the folded portion 20r preferably has a curved shape such as an arc shape.

  When the elongated elastic stretchable member 20 is arranged as shown in the drawing, the elongated elastic stretchable member 20 straddles at least the fixing portion 5f and the main body portion 5b, and straddles the main body portion 5b and the distal end portion 5p. In addition, since it extends along the direction crossing the vertical direction, the elongated elastic elastic member 20 is not only a reinforcing member that connects the boundaries between the fixed portion 5f and the tip portion 5p and the main body portion 5b, but also at each boundary. Since the applied force is dispersed, tearing and tearing are prevented. Moreover, if only the elongated elastic stretchable member 20 is provided, the flexibility is not impaired, and the air permeability is not impaired because the shape is elongated.

  The dimensions and the like of the elongated elastic elastic member 20 may be determined as appropriate. For example, with respect to the dimensions of the fastening panel 5, the height (vertical length) h is 60 to 240 mm, and the width of the fixing portion 5f is 20 to 20 mm. When the width of the main body 5b is 40 to 250 mm and the width of the tip 5p is 30 to 105 mm, the thickness of the elastic elastic member 20 is 300 to 2,500 dtex, and the vertical interval s is 2 to 30 mm. It is preferable to provide the elastic elastic member 20 over the entire vertical direction of the fastening panel.

  Further, when the elongated elastic elastic member 20 is sandwiched between the basic sheet 51 and the presser sheet 53 and these are integrally fixed with a hot melt adhesive, the application pattern of the adhesive can be determined as appropriate, and the width direction However, it is preferable to be intermittent in the width direction, and in particular, the width direction portions of the bonded portion 54 and the non-bonded portion 55 are arranged in the vertical direction. It is preferable. In the figure, this adhesive portion is indicated by a dot pattern (shaded). Specifically, in the case of the illustrated form, the basic sheet 51 and the presser sheet 53 are bonded by a vertically striped bonding portion 54 that is formed at a predetermined interval in the width direction and continues from the upper end to the lower end of the fastening panel. In addition, the elastic stretchable member 20 is bonded and fixed to both the basic sheet 51 and the presser sheet 53 by the vertically striped bonded portions 54, and the basic sheet 51 and the presser sheet 53 are bonded and fixed between the bonded portions 54. Absent. In addition, the width 54w of each bonded portion 54 is 5 mm or less, and the interval (width of the non-bonded portion 55) 55w between the bonded portions 54 is larger than the width 54w of the bonded portion 54.

  More specifically, the width 54w of the bonded portion 54 is about 0.05 to 10 mm, particularly about 0.1 to 5 mm, the width 55w of the non-bonded portion 55 is about 2 to 15 mm, particularly about 2 to 10 mm, and is elongated. It is preferable that the stretch ratio when the elastic elastic member 20 is fixed is about 150 to 500%, particularly about 200 to 400%. Further, the width of the portion of the fastening panel 5 where the elastic elastic member 20 is fixed in the stretched state (in the illustrated embodiment, the portion 22 of the main body portion 5b) is preferably 50 to 300 mm, particularly preferably 100 to 200 mm.

  Thus, by adopting a vertically striped pattern composed of sufficiently thin and sufficiently spaced adhesive lines as the adhesive application pattern, as shown in FIGS. 13 and 14, the main body 5b of the fastening panel 5 is provided. Then, since the low-rigidity non-adhesive portions 55 that are continuous in the vertical direction are intermittently formed in the width direction, the non-adhesive portions 55 can be flexibly bent and the adhesive portions 54 that are continuous in the vertical direction can be bent. Since the width is thin, hardening by an adhesive is suppressed. As a result, the fastening panel 5 employing such an adhesive pattern can be flexibly fitted to the protruding portion of the body surface around the waist. Moreover, if the adhesive pattern is vertical stripes, the elastic elastic member 20 and the basic sheet 51 and the presser sheet 53 are bonded and fixed at a number of locations in the width direction, so that the fixing strength is excellent, and even if the expansion and contraction length is secured long, A regular and beautiful vertical fold is formed, so that the touch and appearance are improved and the expansion and contraction is also smooth.

  As the elastic stretchable member 20 in the fastening panel 5, it is preferable to arrange a plurality of elongated elastic stretchable members in parallel in the vertical direction with a predetermined interval as described above from the viewpoint of air permeability and flexibility. However, since the elongated elastic elastic member 20 has a small contact area, the tightening tends to be locally tight. Therefore, in order to solve this, it is preferable to make the thickness 54t of the adhesive layer in the bonding portion 54 larger than the thickness of the elastic elastic member 20. As a result, even when the elongated elastic elastic member 20 is used, the tightening force is more widely dispersed by the multiple adhesive portions 54 extending in the direction intersecting the tightening direction, and local tightening is alleviated. It becomes like this. Specifically, when the thickness of the elastic elastic member 20 is about 900 to 1300 dtex (0.3 to 10 mm), the applied thickness 54t of the adhesive is 0.01 to 10 mm, particularly 0.1 to 1 mm. preferable.

The total amount of adhesive used for fixing the elongated elastic elastic member 20 and fixing between other nonwoven fabrics is preferably 5 to 40 g / m ² in the main body portion 5b, and 10 to 10 in the tip portion 5p. it is preferable to be 60 g / m ^2, preferably between 5 to 60 g / m ² in the fixing portion 5f. Moreover, when employ | adopting such an adhesion | attachment form, it is preferable that it is a continuous adhesion | attachment in the fixing | fixed part 5f and the front-end | tip part 5p, in the main body part 5b.

  Further, the fastening panel 5 shown in the figure is provided with a perforation 10 extending in the width direction from the outer edge in the width direction at the intermediate portion in the vertical direction to the inside of the main body portion 5b, and is fixed by separating the perforation 10 from each other. It can be separated into an upper panel 5W and a lower panel 5U provided with a part, a main body part, a tip part and a connecting part. The separation line by the perforation 10 is arranged so as not to cross the elongated elastic elastic member 20 and sufficiently separated, or in the case of crossing, the elongated elastic elastic member 20 is cut at the same time when the cut portion of the perforation 10 is formed. It is desirable to keep it. Instead of the perforation 10, it may be separated by cutting or the like in advance. Such a fastening panel 5 can be detachably connected to the front target tape 6 on the abdominal side in a state where the upper panel 5W and the lower panel 5U are crossed. If the tensile stress at the time of elastic deformation is weaker in the portion b2 on the fixed part side than b1, the orientation of the roots of the upper panel 5W and the lower panel 5U is easily changed, and the adjustment of the crossing angle of the upper panel 5W and the lower panel 5U Becomes easy. Of course, the present invention is not limited to the upper and lower two-stage division type, and can be applied to other known fastening panels such as a type that does not divide into two stages.

  Characteristically, the separation distance 5Z between the lower edge of the diaper of the fastening panel 5 and the center of the diaper in the front-rear direction is 15 to 28%, preferably 20 to 25% of the total length L of the diaper. As described above, when the fastening panel 5 having a wide longitudinal length and at least a lower portion elastically extending and contracting in the waist direction is employed, the lower edge of the diaper of the fastening panel 5 and the center of the diaper in the front-rear direction If the separation distance 5Z is within the above range, the fastening panel 5 is difficult to overlap with the root groove of the thigh. Therefore, as in the conventional example shown in FIG. 9, the lower end 5r of the fastening panel 5 is It is difficult for a phenomenon that the portion along the root groove is rolled up as a crease. As a result, a situation in which the connecting portion 9 is detached (peeled) is less likely to occur.

  In addition, when the position of the fastening panel 5 is close to the waist end portion in this way, when the whole fastening panel 5 is connected to the outer surface of the ventral trunk part TF as in the prior art, the sense of unity of the leg openings is reduced. There is a risk. Therefore, as shown in FIG. 2, a front target tape 6S is also provided on the outer surface of the crotch portion C in front of the center of the diaper in the front-rear direction, and the upper panel 5W has a front surface on the outer surface of the abdominal waistline portion TF as in the prior art. Whereas the lower panel 5U is connected to the target tape 6, when the lower panel 5U is connected to the front target tape 6S on the outer surface of the crotch C, the lower panel 5U extends along the root of the thigh. This is preferable because the sense of unity increases and the lower panel 5U is unlikely to sag.

  On the other hand, even if the position of the fastening panel 5 is closer to the end of the waist, the wearer's body is diverse, and if the diaper is displaced, the fastening panel 5 is placed on the root groove of the thigh. And there is a risk of drowning. Therefore, it is preferable to further prevent dripping by combining the following solutions.

That is, in the first solution (embodiment of the present invention) , as shown in FIG. 11, in the front end portion of the lower panel, the connecting portions 9 are provided at both the lower end portion and the upper end portion, respectively. If comprised in this way, since the whole up-down direction of a lower panel is connected with the diaper outer surface, even if force acts so that a lower panel may be rolled, it will become difficult to generate | occur | produce the lower panel.

As shown in FIG. 6, the second solution (reference form) is that when the connecting portion 9 is provided in a portion spaced upward from the lower edge of the fastening panel 5, the tip portion of the fastening panel 5. Among them, the auxiliary connecting portion 9S is provided below the connecting portion 9. Thus, when the connection part 9 is provided in the site | part spaced apart from the lower edge of the fixation panel 5, it follows the part below this connection part 9, especially the root of a thigh as shown in the figure. The triangular part 5r having the oblique side is easy to bend. Therefore, by providing the auxiliary connecting portion 9S as described above, it is possible to fix the portion 5r of the fastening panel 5 that is easy to bend to the outer surface of the diaper, and to effectively prevent the fastening panel 5 from being twisted. This solution has the advantage that it can be applied without changing the dimensional design of existing diapers.

The third solution (reference form) also assumes a case where the connecting portion 9 is provided in a portion spaced upward from the lower edge of the fastening panel 5, although not shown, The rigidity of the part located below the lower edge of the connection part 9 or its vicinity among the expansion-contraction parts 5b is made higher than the rigidity of the part located above it. In particular, the rigidity (flexibility of JIS-L-1096 (45-degree cantilever method)) of the portion located below the lower edge of the connecting portion or the vicinity thereof in the stretchable portion of the fastening panel is 4.5 mm or more. Preferably there is. In this way, by increasing the rigidity of the portion 5r that tends to bend, it is possible to effectively prevent the fastening panel 5 from being twisted. In addition, as a method of providing strength and weakness, in addition to a method of increasing / decreasing the application amount of the adhesive 54 for bonding the sheets 51 and 53, a method of bonding a reinforcing sheet to a portion where rigidity is increased may be employed. it can.

The fourth solution (reference form) also assumes a case where the connecting portion 9 is provided in a portion spaced upward from the lower edge of the fastening panel 5, and as shown in FIG. In the stretchable part 5b of the panel 5, a cut line 5x is formed along the trunk circumference direction at the same vertical position as the lower edge of the connecting part 9 or in the vicinity thereof. As described above, when the cut 5x is provided in the vicinity of the boundary between the portion 5r that is easy to bend and the upper portion, the portion 5r that is easy to bend can be shifted upward, and it is difficult to bend. This solution also has the advantage that it can be applied without changing the dimensional design of the existing diaper.

(Back barrier)
In the disposable diaper 100 of the illustrated form, the back side barrier sheet that stands up with respect to the inner surface of the diaper (the surface of the top sheet 2 in the illustrated form) at the rear end part (the end flap part EF in the illustrated example) of the top sheet 2. 30 is provided. More specifically, as shown in FIG. 5, the back side barrier sheet 30 has a waist side end portion bonded to the surface of the top sheet 2 over the entire width direction by a bonding means such as a hot melt adhesive, and the crotch side. Both ends of the portion are sandwiched between the top sheet 2 and both barrier sheets 4 and joined to both sheets by a joining means such as a hot-melt adhesive (in FIG. 1, these joining portions are directed diagonally downward to the right) The portion between these two end portions is a non-fixed free portion, and the front end portion of this free portion is folded inward (to the top sheet 2 side) so that the opposing surfaces of the folded portions face each other. Is fixed by a solid means such as a hot melt adhesive, and the elongated elastic elastic member 31 is stretched along the width direction between the sheets of the folded portion by a solid means such as a hot melt adhesive. It is constant. In the illustrated example, a plurality of the elongated elastic expansion / contraction members 31 are provided with a predetermined interval, but one may be used. This free portion constitutes a back barrier that stands up against the inner surface of the diaper (the surface of the top sheet 2 in the illustrated embodiment) as a result of the contraction force of the elongated elastic elastic member 31 acting. The base end of the standing portion is located at the boundary between the fixed portion of the waist side end portion of the back side barrier sheet 30 and the inner free portion.

(Back side stretchable part)
Furthermore, the waist side part (end flap part EF which is a waist side edge part in the example of illustration) in the back side part B is comprised as the back side expansion-contraction part 40 in which the width direction intermediate part elastically expands-contracts in the width direction. . Although the back side expansion / contraction part 40 of the example of illustration is provided only in the center part of the width direction, it can be provided over the whole width direction, and can be provided only in the width direction both sides, and it is line symmetrical with respect to the width direction center line WC. Is preferably provided. More specifically, the waist side end portion of the back side barrier sheet 30 is folded inward (top sheet 2 side), the opposing surfaces of the folded portions are fixed by a solid means such as hot melt adhesive, and the folded back. The elongated elastic elastic member 41 is fixed between the sheets of the portion by a solid means such as a hot-melt adhesive in a state of being stretched along the width direction. The number of the elongated elastic elastic members 41 may be one, but it is preferable to provide a plurality of elongated elastic members 41 at predetermined intervals as shown in the illustrated example. The number of elastic elastic members 41 is about 1 to 10, particularly about 2 to 5, and is 3 in the illustrated example. The interval is preferably about 2 to 15 mm, particularly about 3 to 7 mm. Further, the thickness of the elongated elastic elastic member 41 is preferably about 500 to 1500 dtex, particularly about 900 to 1300 dtex (about 0.1 to 3 mm, especially about 0.5 to 3 mm in the case of natural rubber), and is attached. The stretching ratio at the time is preferably about 140 to 200%, particularly about 140 to 180%. In the illustrated example, the elastic elastic member 41 of the back side elastic part 40 is attached using the waist side end part of the back side barrier sheet 30, but this elastic elastic member 41 is attached between the top sheet 2 and the back sheet 1. Alternatively, it can be fixed by being sandwiched between the back sheet 1 and the exterior sheet 12. By having such a back side elastic part 40, the waist side edge part in the diaper back side back part B is pressed elastically against a wearer's back, and a crevice is formed between a diaper and a wearer's back. It becomes difficult to occur.

  The tensile stress at the time of elastic deformation in the width direction of the back side stretchable portion 40 is configured to be weaker (for example, 5% or more weaker) than the tensile stress at the time of elastic deformation of the main body portion 5b of the fastening panel 5. Is preferred. More specifically, it is preferable that the tensile stress at the time of elastic deformation in the back side stretchable portion 40 is 10 kg / m or less, and the tensile stress at the time of elastic deformation in the main body portion 5b of the fastening panel 5 is 5 to 25 kg / m. Is preferred. Such a difference in tensile stress at the time of elastic deformation can be set by appropriately selecting the thickness and number of elastic elastic members 20 and 41 attached to each part. Thereby, even if the back side expansion / contraction part 40 is pressed down by the body at the time of wearing and the extension becomes insufficient, the fastening panel 5 is extended in a tight manner including the extension of the back side expansion / contraction part 40. Thus, when the back side portion 40 is released after being worn, the back side stretchable portion 40 is stretched by the strong contraction force of the fastening panel 5, and the back side stretchable portion 40 is elastically fitted to the wearer's back. It becomes like this. That is, since the back-side stretchable part 40 can be worn in a stretched state so as to obtain sufficient fit, a gap is hardly generated between the back-side portion B of the diaper and the wearer's skin. The tensile stress at the time of elastic deformation refers to a width direction tensile test by cutting a target portion in the width direction (in the case of the back-side stretchable portion 40, a portion where the elastic stretchable member 41 is fixed) from other portions. It means the tensile stress when contracted by 15% with respect to the extension length at the maximum extension in the width direction.

  Moreover, when extending the back side expansion-contraction part 40 with the shrinkage | contraction force of the fastening panel 5 as mentioned above, the maximum expansion-contraction length of the width direction in the expansion / contraction part of the fixation panel 5 is set to the width direction in the back side expansion / contraction part 40. It is preferable that the length is 2 to 15 times, particularly 5 to 7 times as long as the maximum expansion / contraction length, and the expansion / contraction length of the fastening panel 5 is sufficiently longer than the back side expansion / contraction part 40. Note that the maximum stretchable length can be set by appropriately selecting the stretch rate of the elastic stretchable members 20 and 41 attached to each part.

(Elastic elastic members with legs, elastic elastic members around the legs)
On the other hand, on both sides of the widthwise center line WC of the disposable diaper, a plurality of leg-attached elastic elastic members 13 and a plurality of leg-around elastic elastic members 14 extending in the front-rear direction over at least the front-rear range of the crotch C. Are attached so as to be line-symmetric with respect to the diaper width direction center line WC in a state of being stretched along the extending direction. These elastic elastic members 13 and 14 are fixed between the exterior sheet 12 and the back sheet 1 using a hot melt adhesive in the illustrated embodiment, but any other supporting part that supports the absorber 3 may be used. It can also be provided in the part. Here, the support part is a part that supports the absorbent body 3 so as not to be detached from the diaper, and is formed by a composite material other than the absorbent body 3. Specifically, in the case of the present embodiment, the back sheet 1 and the exterior sheet 12 that are members positioned on the back surface side of the absorber 3, the top sheet 2 that covers the surface side of the absorber 3, and the surface side of the absorber 3 The side barrier sheet 4 that covers both sides constitutes the support part of the absorbent body 3, and the middle part in the front-rear direction among the side edges in the width direction forms the edge Le of the leg opening through which the wearer's leg passes. ing. Therefore, the leg elastic base member 13 and the leg elastic member 14 are arranged between the back sheet 1 and the side barrier sheet 4, between the back sheet 1 and the top sheet 2, or depending on the mounting position. It can also be provided on the back surface of the top sheet 2. Moreover, at least one or a part of at least one of the leg-attached root elastic elastic member 13 and the leg-around elastic elastic member 14 can be attached between different sheets. These leg-attached elastic elastic members 13 and leg elastic elastic members 14 are elongated elastic elastic members extending in the front-rear direction, and an inner sheet and an outer sheet sandwiching and fixing them are a back sheet 1 and an outer sheet in the illustrated embodiment. 12.

  Each leg base elastic elastic member 13 is for adapting a flat diaper member to a complicated shape around the leg root of the wearer, and from the crotch part to the back side B, the center line in the diaper front-rear direction A first bending point c1 located within a range of 110 to 90 mm on the rear side with respect to the LC and a distance of 100 to 110 mm from the diaper width direction center line WC, and a diaper longitudinal center line A second bending point c2 that is within a range from a position of 10 mm on the rear side to a position of 15 mm on the front side with respect to the LC and that is separated from the diaper width direction center line WC by 40 to 30 mm. , In this order, and has a slope in which the distance from the central line WC in the diaper width direction decreases from the portion behind the first bending point c1 to the second bending point c2. 2 at the bending point c2 It is closest to the widthwise center line WC, has a bent shape that bulges outward in the width direction at the first bending point c1, and has a bent shape that bulges toward the center in the width direction at the second bending point c2. It is what.

  Further, each leg-attached elastic elastic member 13 is in a range of 130 to 165 mm forward from the diaper front-rear direction center line LC from the crotch part to the ventral side, and from the diaper width direction center line WC. The third bending point c3 located within the range of 65 to 55 mm in the separation distance, within the range of 160 to 215 mm on the front side with respect to the diaper front-rear direction center line LC, and the separation distance from the diaper width direction center line WC Is located within the range of 175 to 245 mm in front of the fourth bending point c4 and the diaper front-rear direction center line LC, and the separation distance from the diaper width direction center line WC is within a range of 80 to 95 mm. A bending line shape passing through the fifth bending point c5 located in the range of 90 to 120 mm in this order is formed, and the diaper width direction central line WC extends from the second bending point c2 to the front side from the fifth bending point c5. The fourth bending point c4 has a bending shape that bulges outward in the width direction, and the third and fifth bending points c5 bulge toward the center in the width direction. It has a bent shape. The leg base elastic member 13 may adopt another arrangement pattern from the crotch portion to the ventral side.

  The number of the leg-base elastic members 13 on the left and right sides can be determined as appropriate, but about 1 to 5, particularly about 2 to 4, is appropriate, and is 3 in the illustrated example. When the number of the leg-base elastic stretch members 13 on the left and right sides is plural, the interval is, for example, about 1 to 20 mm, preferably about 2 to 15 mm, and particularly preferably about 8 to 12 mm. Moreover, as each leg base elastic member 13, the styrene rubber, the olefin rubber, the urethane rubber, the ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, Usually used materials such as silicon and polyester can be used, and the thickness is about 300 to 3000 dtex, particularly about 500 to 1500 dtex, and about 0.1 to 3 mm, especially about 0.5 to 3 mm in the case of natural rubber. preferable. Moreover, it is preferable that the elongation rate at the time of fixation of each leg base elastic elastic member 13 is about 600 to 1400%, especially about 150 to 250%.

  As shown in FIG. 15, when such a bent line-shaped leg base elastic elastic member 13 is provided, the diaper has a complicated three-dimensional shape around the base of the leg, that is, the wearer's It fits securely not only from the crotch to the groin and the upper part of the thigh fasciae laevis muscle, but also from the crotch to the buttocks across the convex part of the adductor muscle group. More specifically, the part of the diaper having the second bent point c2 to the first bent point c1 of the leg base elastic elastic member 13 is pressed from the rear part of the crotch of the wearer to the groin, and the first bent point c1. The more rear part is pressed from the wearer's groin to the upper part of the thigh fascia latae muscle. Further, the portion having the second bending point c2 to the third bending point c3 is pressed over the entire crotch of the wearer, and the portion from the third bending point c3 to the fifth bending point c5 has the fourth bending point c4. The portion is pressed along the convex portion of the adductor muscle group with the apex as the apex, and the portion in front of the fifth bending point c5 is pressed against the wearer's buttocks. In this way, by providing the elastic elastic member 13 in an arrangement adapted to the complicated shape around the base of the leg, not only static fit but also dynamic fit is improved, for example from the supine position The shape of the diaper can easily follow the shape change around the base of the leg when changing from the sitting position to the supine position. As a result, an unnecessary space is hardly formed between the diaper and the base of the leg, and leakage is less likely to occur. For comparison, a photograph of a conventional disposable diaper wearing state is shown in FIG. This conventional disposable diaper does not have an elastic elastic member that overlaps with the absorber 3 like the above-mentioned leg-base elastic elastic member 13, and in the front-rear direction at the same position as the leg-around elastic elastic member 14 described later. 3 elongated elastic elastic members arranged in a straight line along the back, mounted on a dummy doll in a supine position, and repeated posture changes 10 times after returning from lying on the back to sitting on the back. Indicates a state (turning or a gap is present).

  Here, the position of each said bending point assumes the disposable diaper for adults. Specifically, the overall length is about 700 to 1000 mm, the length corresponding to the edge Le of the leg opening is about 300 to 550 mm, and within the range of 110 to 90 mm on the rear side with respect to the diaper longitudinal center line LC. The width in the range from the position of 10 mm on the rear side to the position of 15 mm on the front side is about 40 to 100 mm, and the width on the diaper front and rear direction center line LC is about 180 to 240 mm. The width in the range of 130 to 165 mm on the front side is about 90 to 150 mm, and the width in the range of 160 to 215 mm on the front side is about 140 to 210 mm with respect to the center line LC of the diaper. Especially suitable for disposable diapers whose width in the range of 175 to 245 mm on the front side is about 160 to 260 mm It is intended. Further, in the diaper sample shown in FIG. 15, the positions of the respective bending points with respect to the diaper longitudinal center line LC are as follows: first bending point c1: rear side 90 mm, second bending point c2: front side 10 mm, third bending point c3: Front side 130 mm, fourth bending point c4: front side 170 mm, fifth bending point c5: front side 235 mm.

  On the other hand, when the above-mentioned leg-base elastic stretchable member 13 is provided for a disposable diaper of a general design, the leg-base elastic stretchable member 13 of the leg-root elastic stretchable member 13 is provided on both sides of the diaper over at least the front-back range of the crotch C. A leg surrounding portion LH that protrudes outward in the width direction from the part is formed, and at least from the second bending point c2 to the third bending point c3 in the leg-base elastic elastic member 13 of both sides of the absorbent body 3 A portion corresponding to this portion in the front-rear direction extends to the intermediate portion in the width direction of the leg-surrounding surrounding portion LH. Therefore, the leg-surrounding elastic member 13 alone does not allow the outer leg surrounding portion LH to be pressed around the leg, and therefore excrement may leak from the absorber side located in the surrounding portion LH. There is. In order to solve this, it is conceivable to narrow the width of the absorbent body 3 in the portion including the crotch portion, but it is not preferable because it is difficult to secure the amount of absorption in the crotch portion, which is the most important portion.

  Therefore, in the illustrated form, the absorber 3 is provided over at least the front-rear direction range of the crotch C, and at least from the second bending point c2 to the third bending point c3 in the leg-base elastic elastic member 13 of both sides thereof. The leg-corresponding elastic stretch member extending along the edge Le of the leg opening to each leg-surrounding portion LH while extending a portion corresponding to the portion in the front-rear direction to the middle portion in the width direction of the leg-surrounding portion LH 14 is attached in an extended state along its extending direction. In this way, when the leg elastic member 14 extending along the edge Le of the leg opening is provided not only on the leg elastic base member 13 but also on the leg surrounding portion LH that protrudes outward in the width direction. The leg surrounding portion LH is pressed around the leg, and leakage from the leg is less likely to occur.

  The number of the leg elastic members 14 on the left and right sides can be determined as appropriate, but about 3 to 10, more preferably about 3 to 8, and especially about 4 to 6 are appropriate. It is a book. When the number of the leg elastic members 14 on the left and right sides is plural, the interval is about 1 to 20 mm, preferably about 2 to 15 mm, and particularly preferably about 6 to 10 mm. In addition, as the elastic elastic members 14 around each leg, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, which are formed in a thread shape, a string shape, a belt shape, or the like. Usually used materials such as polyester can be used, and the thickness is preferably about 500 to 1500 dtex, and in the case of natural rubber, about 0.1 to 3 mm, particularly about 0.5 to 3 mm. Moreover, it is preferable that the elongation rate at the time of fixation of the elastic elastic member 14 around each leg is about 150 to 250%.

  Further, as shown in the figure, when the number of the leg elastic elastic members 14 on the left and right sides is plural, at least some of the leg elastic elastic members 14 are at least in the leg-base elastic elastic members 13. The portion from the second bending point c2 to the third bending point c3 and the portion corresponding in the front-rear direction are arranged so as to pass between the side edge of the absorber 3 and the edge Le of the leg opening, The elastic elastic member 14 passes through a position where at least a portion corresponding to the second bending point c2 to the third bending point c3 in the leg-base elastic elastic member 13 in the front-rear direction overlaps with the side portion of the absorber 3. It is preferable to arrange them as follows. In this way, the leg elastic member 14 is provided in a proper position, and both the widthwise inner part having the absorber 3 and the widthwise outer part not having the absorber are pressed around the leg, thereby surrounding the leg. The entire portion LH fits evenly around the legs, further improving the leakage prevention effect.

(Slit of absorber)
In order to further improve the fit to the periphery of the above-mentioned leg root, as shown in FIG. 10, the leg attachment is attached to a part or all of the passage portion of the leg-base elastic elastic member 13 on both sides of the absorber 3. A slit 3 </ b> X is formed along the passing direction of the root elastic elastic member 13. In the illustrated example, the slit 3 </ b> X is formed by a linear cutout portion whose front end reaches the periphery of the absorber 3 and opens, but can also be formed as a hollow that does not reach the periphery of the absorber 3. Moreover, when the absorber 3 has a laminated structure of a plurality of layers as in the illustrated example, it is preferable to form slits 3X in all the layers 3A and 3B as illustrated, but some layers (single or plural may be used). ). Moreover, it may replace with the slit 3X and may form the linear compression part by embossing.

  The dimensions and the like of the slit 3X can be determined as appropriate. The width of the slit 3X is preferably about 10 to 25 mm from the viewpoint of ease of manufacture. In the illustrated example, the slit 3X is formed on substantially the entire portion where the portion between the second bending point (rear-side bending point) c2 and the fourth bending point (front-side bending point) c4 of each leg base elastic member 13 passes. It is formed in a bent line shape along the passing direction. Also in other types of disposable diapers in which the arrangement of the leg-attached elastic base members 13 is different, the same longitudinal direction as the portion between the second bending point (rear bending point) c2 and the fourth bending point (front bending point) c4. It is preferable to provide a slit 3X in the range.

  By providing such a slit 3X, as shown in FIG. 15, due to the action of the contracting force of the leg-attached elastic elastic member 13, the leg-adapted elastic elastic member 13 of the part having the absorbent body 3 in the crotch part is provided. When the passing part is pressed against the base of the leg from the crotch to the inner side of the thigh, the absorbent body 3 is securely bent along the slit 3X, and the corners fit more appropriately to the base of the leg. Of the portion having the absorbent body 3, the portion on the outer side in the width direction with respect to the passage portion of the leg base elastic elastic member 13 fits more appropriately from the base of the leg to the periphery of the leg, and the inner portion in the width direction is the base of the leg Fit more appropriately from the crotch to the crotch.

  In particular, it is preferable to provide a plurality of leg-base elastic stretch members 13 on both sides of the diaper width direction center line WC. In this case, at least one of the leg-base elastic stretch members 13 on each side is provided. Is preferably disposed so as to pass through the region of the slit 3X, and at least one other is disposed so as to pass outside in the width direction of the region of the slit 3X (particularly, a portion overlapping with the absorber 3). Thereby, the leg base elastic elastic member 13 that passes through the region of the slit 3X forms a firm corner at the bent portion of the absorbent body 3 and firmly presses the corner against the leg base. The leg base elastic elastic member 13 passing through the outside in the width direction of the slit 3X can firmly press the portion outside in the width direction from the bent portion from the base of the leg to the periphery of the leg.

  On the other hand, the interval between the plurality of leg-attached elastic elastic members 13 is narrowed toward the front side, and the interval between the plurality of leg elastic elastic members 14 is decreased toward the front and rear sides. Further, the front and rear sides of these elastic elastic members 13 and 14 are provided over the waist side side flap portion SF (waist side from the edge Le of the leg opening), and on the back side, the fixing portion 5f of the fastening panel 5 is provided. It extends toward the position overlapping with the front target tape 6 on the ventral side.

  Moreover, in the part which overlaps the front-and-rear both-ends part in the leg base part and the leg periphery elastic expansion-contraction members 13 and 14, the adjacent sheet (back sheet 1 and exterior sheet 12) which clamps the leg base part and leg periphery elastic expansion members 13 and 14 is held. The non-fixed area is not fixed, and the leg base and the leg elastic members 13 and 14 are not fixed to the adjacent sheets (back sheet 1 and exterior sheet 12) in this area. This is because the elastic elastic members 13 and 14 are cut at the same time by cutting at the front and rear edges performed at the time of manufacturing, and the leg bases and the front and rear ends of the leg elastic elastic members 13 and 14 are contracted and drawn between adjacent sheets. This is to prevent it from protruding from the front and rear edges. As a result, as shown by a dotted line in FIG. 13, a cylindrical passage 12 r formed of a non-fixed region is formed between the exterior sheet 12 and the backsheet 1. The passage 12r is open at the front and rear edges of the product. The seats 1 and 12 are fixed to each other at portions overlapping the leg base and other portions (intermediate portions in the front-rear direction) of the leg elastic base members 13 and 14, and the leg base and leg elastic elastic members are fixed in the fixing region. 13 and 14 are bonded and fixed to both sheets 12 and 1 in an extended state.

  The position of the cylindrical passage 12r extends from the waist side end edge to the lower edge of the front target tape 6 on the abdominal side, and the leg base and leg elastic elastic members 13 from the lower end opening of the passage 12r. 14 have been introduced. As a result, by extending the width of the target tape 6 to the vicinity of both ends of the abdominal waist side flap SF, or extending to the crotch side, the leg-attached root portion and the leg elastic elastic members 13 and 14 are formed. Even if it is arranged to intersect with the target tape 6, the contraction force of the leg base and leg elastic members 13, 14 does not act on the target tape 6, and the leg base and leg elastic members 13, 14. The target tape 6 does not wrinkle due to the shrinkage force. Therefore, a sufficient coupling force can be obtained over the entire target tape 6.

  Further, in the ventral portion F, the leg base and the leg elastic members 13 and 14 are crotch side edges of the passage 12r while maintaining a certain distance (for example, about 2 to 10 mm, particularly about 3 to 10 mm). It is preferable to provide so that it may reach. In this manner, when the leg bases on the left and right sides and the leg elastic elastic members 13 and 14 are arranged so that the distance decreases from the crotch part toward the front side, a plurality of elastic elastic members 13 and 14 are provided. Has a certain distance in the width direction at a position intersecting the crotch side edge of the passage 12r, it is difficult for the contracting force to concentrate on the boundary between the passage 12r which is a non-adhering region and the fixing region on the crotch side. In addition, the deterioration of fit and appearance can be prevented.

  However, in this case, if the target tape 6 is provided over a wide range also on the crotch side, the non-fixed area becomes excessive, which may cause problems such as a decrease in strength. This is especially true when the passage 12r, which is a non-fixed area, is provided by a rectangular adhesive pattern. Accordingly, as shown in the drawing, the distance between the leg base and the leg elastic elastic members 13 and 14 is reduced (that is, the side edge of the passage 12r follows the curve of the adjacent elastic elastic member), It is preferable to reduce the width from the crotch side edge of the target tape 6 toward the waist side edge in the abdominal side portion. Since it is difficult to continuously change the width of the non-fixed region in a normal diaper production line, it is preferable to form the non-fixed region in a stepped manner as shown in the figure. In particular, when the leg base portion and the leg elastic members 13 and 14 have a pattern as shown in the drawing, the side edge on the outer side in the width direction of the passage 12r is linearly formed along the front-rear direction. It is preferable that only the side edge on the center side in the direction be bent stepwise.

  In the above example, the leg bases and the portions in the passage 12r (non-adhesion region) of the leg elastic members 13 and 14 are not fixed to both the adjacent sheets (back sheet 1 and exterior sheet 12). However, it may be fixed to the back sheet 1 as the inner sheet.

  On the other hand, unlike the illustrated embodiment, the position of the passage 12r on the back side is preferably provided in a portion that does not overlap the fixing portion 5f of the fixing panel 5 because the fixing strength of the fixing portion 5f of the fixing panel 5 is increased.

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

  DESCRIPTION OF SYMBOLS 1 ... Liquid impervious back sheet, 2 ... Liquid permeable top sheet, 3 ... Absorber, 3X ... Slit, 4 ... Side part barrier sheet, 5 ... Fastening panel, 6 ... Target tape, 7 ... Elongated elastic expansion / contraction Members 9 ... hook tape, 10 ... perforation, 12 ... exterior sheet, 13 ... leg elastic elastic member with leg, 14 ... elastic elastic member around leg, 20 ... elongated elastic elastic member, 30 ... back barrier sheet, 40 ... Dorsal elastic part.

Claims (2)

The crotch part, which is defined as a front-rear direction range in which both side edges form a constricted curve shape around the leg,
A part extending to the front side and the rear side of the crotch part, and both side edges form a straight shape along the front-rear direction;
A fastening panel that is protruded from both sides in the width direction in the back side waistline portion, and that is configured as an expansion / contraction portion that at least a lower part elastically expands and contracts in the waist circumference direction,
In a tape-type disposable diaper having a connecting part that is detachably connected to the outer surface of the front part of the diaper in the front-rear direction center provided at the tip part of at least the lower part of each fastening panel;
The longitudinal length of the crotch is 30-50% of the total length of the diaper,
The longitudinal length of the back waistline portion is 25 to 35% of the total length of the diaper,
The lateral length of the back waistline portion is 45 to 70% of the total length of the diaper,
The longitudinal length of the fastening panel is 20 to 35% of the total length of the diaper,
And the lower edge of the diaper of the fastening panel, the distance between the front-rear direction center of the diaper, Ri 15-28% der of the total length of the diaper,
The fastening panel has an upper panel and a lower panel that are cut and separated in advance or can be separated by a perforation, and the connecting portion is provided at each tip of the upper panel and the lower panel. , the connecting portion to the tip portion of at least the lower panel on both sites of the lower end and an upper end that provided respectively,
A tape-type disposable diaper characterized by that. The fastening panel has an upper panel and a lower panel that are cut and separated in advance or can be separated by a perforation, and the connecting portion is provided at each tip of the upper panel and the lower panel. And
A front target tape for connecting the connection portion of the upper panel of the fastening panel is provided on the outer surface of the abdomen waist portion, and on the outer surface of the front portion of the crotch portion from the front-rear direction center of the diaper. A front target tape for connecting the connecting portion of the lower panel of the fastening panel is provided,
The tape-type disposable diaper according to claim 1.