JP5791260B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article that has regular wrinkles formed in the stretchable part and is excellent in air permeability but is easy to manufacture.

  For example, a 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. Are joined together to form a waist opening and a pair of left and right leg openings.

  In a pants-type disposable diaper, in order to improve the fit to the body, an elongated elastic elastic member such as rubber thread is fixed in an extended state at various locations on the exterior sheet to constitute a fitting elastic part. Among them, a waist edge elastic elastic member along the width direction at the edge of the waist opening, and a waist lower elastic elastic member along the width direction at the crotch side than the waist edge elastic elastic member Has a relatively high body fit and is widely used.

  On the other hand, a tape-type disposable diaper has a crotch part, a ventral part extending to the front side of the crotch part, a back side part extending to the rear side of the crotch part, and a fastening projecting from both sides of the back part. It has a tape and a target tape that is located on the outer surface of the abdomen and to which the fastening tape is connected. When wearing it on the body, turn the fastening tape from both sides of the waist to the outer surface of the abdomen and use it as the target tape. It has a structure to connect. Such a tape-type disposable diaper is used not only for infants but also widely used for nursing care (adult use). In general, tape-type disposable diapers are inferior in fit in the waistline direction compared to pants-type disposable diapers, and in order to improve this, elongated elastics such as rubber thread along the width direction on the waistline part of the back side part An expansion / contraction member is provided to form a fit expansion / contraction section.

  Furthermore, in recent years, a plurality of elongated elastic elastic members that can be expanded and contracted independently of both sheet materials are arranged in a non-joined portion between two sheet materials joined by joint portions provided intermittently, Techniques (see Patent Documents 1 to 3) for forming a fitting stretchable part have been proposed. According to this prior art, in the expansion / contraction part for fitting, the part where the joint part is aligned in the vertical direction becomes a continuous groove in the vertical direction, and the part between the grooves bulges to the same extent on both sides Thus, the air permeability is improved by the groove, and the cushioning property (compression restoring property) is excellent due to the large bulge, and the elongated elastic elastic member is hard to hit the skin.

JP 2008-295930 A JP 2009-297096 A JP 2009-148447 A

  However, this prior art has a problem in that the portion between the grooves in the fitting stretchable part bulges to the same degree on both the front and back sides, and the thickness of the fitting stretchable part increases excessively. This problem is not preferable when an outer such as clothing is used together like a disposable diaper or a sanitary napkin because the outer is hard to wear.

  In addition, the above prior art has a problem in that it cannot be manufactured by a general-purpose technique in which a hot melt adhesive is applied to the outer peripheral surface of an elongated elastic elastic member and is sandwiched and fixed between sheets.

  Therefore, the main problem of the present invention is that it has excellent breathability and cushioning properties, and the impact of the elongated elastic elastic member on the skin is reduced. To provide an article.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A first sheet base material having a surface in contact with the skin of the wearer; a second sheet base material bonded to a surface opposite to the surface in contact with the wearer's skin in the first sheet base material; and these sheets In an absorbent article comprising a stretchable part for fitting having an elongated elastic stretchable member provided between substrates,
The first sheet base material has a top portion and a bottom portion extending in a direction parallel to the elongated elastic elastic member in a direction perpendicular to the elongated elastic elastic member in a state where at least the fitting elastic portion is expanded. It is formed in a wavy shape that is positioned alternately with a gap between
The second sheet base material is configured to be flat in a state in which at least the fitting stretchable part is developed,
Of the top portion and the bottom portion of the first sheet base material, the one that bulges toward the second sheet base material is fixed to the opposite portion of the second sheet base material, and the first sheet base is between the fixed portions. The material is not fixed to the second sheet base material and can be swelled away from the second sheet base material,
The elongated elastic elastic member is arranged along the direction of bulging to the second sheet substrate side among the top and bottom portions of the first sheet substrate, and is elongated in the longitudinal direction. Of the top and bottom of one sheet base material, it is sandwiched and fixed between the second sheet base material and the one that bulges to the second sheet base material side.
An absorbent article characterized by the above.

(Function and effect)
In the stretchable part of such a structure, the first sheet base material constituting the surface that comes into contact with the wearer's skin, the portion located between the elongated elastic stretchable members becomes redundant with respect to the second sheet base material, This surplus portion is formed so as to be stepped in a direction orthogonal to the elongated elastic elastic member. The surplus portion contracts with the contraction of the elongated elastic elastic member, and the sandwiching portion of the elongated elastic elastic member by the first sheet base material and the second sheet base material is caused by the contraction force of the elongated elastic elastic member. By shrinking and increasing the rigidity, the excess portion of the first sheet base material bulges greatly toward the skin side with the sandwiched portion of the elongated elastic stretchable member as a support. On the other hand, only the shrinkage wrinkles accompanying the shrinkage of the elongated elastic elastic member are formed on the second sheet base material. As a result, the expansion / contraction part for fitting is formed with a bulging part larger than the contraction wrinkle by the elongated elastic elastic member on the skin side of the wearer with respect to the elongated elastic elastic member, and the elongated elastic part on the opposite side. It becomes a front and back non-target structure in which only shrinkage wrinkles due to the elastic member enter.
Therefore, as in the prior art, the air permeability and cushioning properties are excellent, and the contact of the elongated elastic stretchable member with the skin is alleviated, but the increase in thickness is small unlike the prior art. For this reason, even when an outer such as clothing is used in combination with a disposable diaper or a sanitary napkin, the outer is hardly worn. Further, there is an advantage that the first sheet base material can be manufactured using conventional general-purpose equipment, except that the first sheet base material is corrugated.

<Invention of Claim 2>
A first sheet base material having a surface in contact with the skin of the wearer; a second sheet base material bonded to a surface opposite to the surface in contact with the wearer's skin in the first sheet base material; and these sheets In an absorbent article comprising a stretchable part for fitting having an elongated elastic stretchable member provided between substrates,
The first sheet base material and the second sheet base material form an integral laminated body, and the integral laminated body has a top portion and a bottom portion extending in a direction parallel to the elongated elastic elastic member. It is formed in a wavy shape that is alternately positioned with an interval in a direction orthogonal to the elastic elastic member,
The elongated elastic elastic member is disposed along the side of the top and bottom located on the opposite side of the skin side of the wearer, and is elongated in the longitudinal direction, and the first sheet base and the second It is clamped and fixed between sheet base materials,
An absorbent article characterized by the above.

(Function and effect)
In the stretchable part having such a structure, the first sheet base material and the second sheet base material are integrally formed into a wave-like portion at the top portion and the bottom portion of the elongated elastic member in a direction far from the wearer's skin. The elastic member is positioned, and the part on the skin side than that is formed as an excess part so as to be stepped in a direction orthogonal to the elongated elastic elastic member. The surplus portion contracts with the contraction of the elongated elastic elastic member, and the sandwiching portion of the elongated elastic elastic member by the first sheet base material and the second sheet base material is caused by the contraction force of the elongated elastic elastic member. By contracting and increasing the rigidity, the surplus portion bulges greatly toward the skin side with the sandwiched portion of the elongated elastic stretchable member as a support. As a result, the expansion / contraction part for fitting is formed with a bulging part larger than the contraction wrinkle by the elongated elastic elastic member on the skin side of the wearer with respect to the elongated elastic elastic member, and the elongated elastic part on the opposite side. It becomes a front and back non-target structure in which only shrinkage wrinkles due to the elastic member enter.

  Therefore, as in the prior art, the air permeability and cushioning properties are excellent, and the contact of the elongated elastic stretchable member with the skin is alleviated, but the increase in thickness is small unlike the prior art. For this reason, even when an outer such as clothing is used in combination with a disposable diaper or a sanitary napkin, the outer is hardly worn. Furthermore, it can be manufactured using conventional general-purpose equipment except that the laminated body of the first sheet base material and the second sheet base material is integrally formed in a wave shape. Since the sheet-like base material is bonded and integrated and the elongated elastic elastic member is sandwiched and fixed between them, it can be processed into a corrugated shape, so that there is an advantage that the elongated elastic elastic member can be easily positioned with respect to the wave.

<Invention of Claim 3>
A first sheet base material having a surface in contact with the skin of the wearer; a second sheet base material bonded to a surface opposite to the surface in contact with the wearer's skin in the first sheet base material; and these sheets In an absorbent article comprising a stretchable part for fitting having an elongated elastic stretchable member provided between substrates,
In the first sheet base material, a bulging portion that bulges toward the opposite side to the second sheet base material side from the peripheral edge toward the central portion is provided in parallel along the direction parallel to the elongated elastic elastic member. A plurality of bulged portion rows formed in a manner spaced at intervals in a direction orthogonal to the elongated elastic elastic member,
The second sheet base material is configured to be flat in a state in which at least the fitting stretchable part is developed,
A portion between the bulging portion rows in the first sheet base material is fixed to a facing portion in the second sheet base material, and a bulging portion in the first sheet base material is not fixed to the second sheet base material. Swelled away from the second sheet base material,
The elongated elastic elastic member is disposed between the bulging portion rows in the first sheet base material and is extended in the longitudinal direction between the bulging portion rows in the first sheet base material. Between the portion and the second sheet base material,
An absorbent article characterized by the above.

(Function and effect)
In the stretchable part having such a structure, the sandwiched portion of the elongated elastic stretchable member by the first sheet base material and the second sheet base is shrunk by the shrinkage force of the elongated elastic stretchable member, thereby increasing the rigidity. A large number of bulging portions in the first sheet base material bulge to the skin side with the sandwiched portion of the elongated elastic elastic member as a support. On the other hand, only the shrinkage wrinkles accompanying the shrinkage of the elongated elastic elastic member are formed on the second sheet base material. As a result, the stretchable part for the fit has front and back that has a larger wrinkle on the skin side of the wearer than the slender elastic elastic member, and only the contracted wrinkle on the opposite side. It becomes a non-target structure.
Therefore, as in the prior art, the air permeability and cushioning properties are excellent, and the contact of the elongated elastic stretchable member with the skin is alleviated, but the increase in thickness is small unlike the prior art. For this reason, even when an outer such as clothing is used in combination with a disposable diaper or a sanitary napkin, the outer is hardly worn. Further, there is an advantage that the first sheet base material can be manufactured using conventional general-purpose equipment, except that the first sheet base material is corrugated.

<Invention of Claim 4>
A first sheet base material having a surface in contact with the skin of the wearer; a second sheet base material bonded to a surface opposite to the surface in contact with the wearer's skin in the first sheet base material; and these sheets In an absorbent article comprising a stretchable part for fitting having an elongated elastic stretchable member provided between substrates,
The first sheet base material and the second sheet base material form an integral laminate, and with respect to the integral laminate, at least the fitting stretchable part is fully extended in the stretch direction from the periphery. A bulging portion row formed by juxtaposing a bulging portion that bulges toward the wearer's skin side toward the center portion along a direction parallel to the elongated elastic elastic member is the elongated elastic elastic member. Are formed at intervals in a direction orthogonal to
The elongated elastic elastic member is disposed between the bulging portion rows and is clamped and fixed between the first sheet base material and the second sheet base material in a state of being elongated in the longitudinal direction.
An absorbent article characterized by the above.

(Function and effect)
In the stretchable part having such a structure, the sandwiched portion of the elongated elastic stretchable member by the first sheet base material and the second sheet base is shrunk by the shrinkage force of the elongated elastic stretchable member, thereby increasing the rigidity. The bulging portion formed by integrating the first sheet base material and the second sheet base material bulges greatly toward the skin side with the sandwiched portion of the elongated elastic stretchable member as a support. As a result, the expansion / contraction part for fitting is formed with a bulging part larger than the contraction wrinkle by the elongated elastic elastic member on the skin side of the wearer with respect to the elongated elastic elastic member, and the elongated elastic part on the opposite side. It becomes a front and back non-target structure in which only shrinkage wrinkles due to the elastic member enter.
Therefore, as in the prior art, the air permeability and cushioning properties are excellent, and the contact of the elongated elastic stretchable member with the skin is alleviated, but the increase in thickness is small unlike the prior art. For this reason, even when an outer such as clothing is used in combination with a disposable diaper or a sanitary napkin, the outer is hardly worn. Furthermore, it can be manufactured using conventional general-purpose equipment except that the bulging portion is integrally formed on the laminate of the first sheet base material and the second sheet base material, and in particular, the first sheet base material. And the second sheet base material are bonded and integrated, and after the elongated elastic elastic member is sandwiched and fixed therebetween, the bulging portion can be formed integrally, so that the elongated elastic expansion and contraction with respect to the bulging portion row There is also an advantage that positioning of the member becomes easy.

<Invention of Claim 5>
An exterior sheet constituting the front body and the back body, and an interior body including an absorbent body fixed to the inner surface of the exterior sheet, including both sides of the exterior sheet in the front body and both sides of the exterior sheet in the back body Are joined together, the waistline portion is formed in an annular shape, and a waist opening and a pair of left and right leg openings are formed, a pants-type disposable diaper,
In the region including at least both sides in the width direction of the interior body in the exterior sheet, the stretchable part for fitting is provided so that the elongated elastic stretchable member is in the width direction.
The absorbent article of any one of Claims 1-4.

(Function and effect)
The stretchable part for fitting according to the present invention is thus suitable for regions located at least on both sides in the width direction of the interior body in the exterior sheet of the pants-type disposable diaper.

  As described above, according to the present invention, it is excellent in breathability and cushioning properties, and the elastic contact member of the elongated elastic stretch member can be eased against the skin. The benefits of

It is a top view in the state where the diaper was developed showing the inside of a pants type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a pants type disposable diaper. FIG. 3 is a 3-3 cross-sectional view of FIG. 1. FIG. 4 is a sectional view taken along the line 4-4 in FIG. 1. FIG. 5 is a sectional view taken along line 5-5 in FIG. 1. It is (a) perspective view and (b) sectional drawing which show the 1st form of an expansion-contraction part. It is sectional drawing which shows only the principal part of a pants type disposable diaper. It is a perspective view of a pants type disposable diaper. It is a front view which shows a wave processing roll. It is (a) perspective view and (b) sectional drawing which show the 2nd form of an expansion-contraction part. It is (a) perspective view and (b) sectional drawing which show the 3rd form of an expansion-contraction part. It is (a) perspective view and (b) sectional drawing which show the 4th form of an expansion-contraction part. It is a photograph which shows the experimental example of an expansion-contraction part. It is a photograph which shows the experimental example of an expansion-contraction part. It is a photograph which shows the experimental example of an expansion-contraction part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 8 show an example 100 of a pants-type disposable diaper. The pants-type disposable diaper 100 includes an exterior sheet 12 that forms the outer surface (rear surface) of the product and an interior body 200 that is attached to the inner surface of the exterior sheet 12. Symbol Y indicates the total length of the diaper, and symbol X indicates the total width of the diaper.

  The interior body 200 is a part that absorbs and holds excrement such as urine, and the exterior sheet 12 is a part that is worn by the wearer. In addition, the dot pattern part in sectional drawing has shown the junction part which joins each structural member, and is formed by solid, beads, curtains, summits, spiral application, etc., such as a hot-melt-adhesive. The “front-rear direction” means the direction connecting the ventral side (front side) and the back side (rear side), “width direction” means the direction (left-right direction) orthogonal to the front-rear direction, and “up-down direction "In the state of wearing the diaper 100, that is, the direction perpendicular to the waistline direction when the diaper 100 is folded in two at the crotch portion so that both sides of the front body and the back body side of the diaper 100 are overlapped, in other words, For example, it means a direction connecting the waist opening WO side and the crotch side.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the interior body 200 includes a surface sheet 30 on the body side, a liquid-impermeable back sheet 11, and an absorbent element 50 interposed therebetween. It is the main body that takes up the absorption function. Reference numeral 40 denotes an intermediate sheet (second sheet) provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorbent element 50. Shows barrier cuffs 60 that stand on the body side and are provided on both sides of the interior body 200 in order to prevent excrement from leaking to both sides of the interior body 200.

(Surface sheet)
The top sheet 30 has a property of transmitting liquid, and examples thereof include a porous or non-porous nonwoven fabric, a porous plastic sheet, and the like. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, if flexibility and drapeability are required, the spunbond method and spunlace method are preferable. If bulkiness and softness are required, the air-through method, point bond method, and thermal bond method are preferable processing methods. .

  Further, the top sheet 30 may be composed of one sheet or may be composed of a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

  When the barrier cuff 60 is provided, both sides of the top sheet 30 pass between the liquid-impervious back sheet 11 and the barrier cuff 60 to the back side of the absorbent element 50 to prevent the penetration of the liquid. It is preferable to adhere to the liquid-impermeable back sheet 11 and the barrier cuff 60 with a hot melt adhesive or the like.

(Intermediate sheet)
An intermediate sheet (also referred to as “second sheet”) 40 having a higher liquid permeation rate than the top sheet 30 can be provided to quickly transfer the liquid that has passed through the top sheet 30 to the absorber. This intermediate sheet 40 not only improves the absorption performance of the absorbent by quickly transferring the liquid to the absorbent body, but also prevents the “reversed” phenomenon of the absorbed liquid from the absorbent body, so that the top sheet 30 is always dried. It can be made into the state which carried out. The intermediate sheet 40 can be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace, spunbond, SMS, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{20~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw fiber of the nonwoven fabric is preferably 2.2 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use an eccentric fiber, a hollow fiber, or an eccentric and hollow fiber that does not have a core at the center as the mixed fiber of all or part of the raw fiber.

  The intermediate sheet 40 in the illustrated form is disposed in the center shorter than the width of the absorber 56, but may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the length of the absorbent body 56 or may be within a short length range centered on the region that receives the liquid.

(Impermeable liquid back sheet)
The material of the liquid-impermeable back sheet 11 is not particularly limited. For example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric in which a plastic film is provided on the surface of the nonwoven fabric, or plastic Examples thereof include a laminated sheet in which a nonwoven fabric or the like is laminated on a film and joined. For the liquid-impermeable back sheet 11, it is preferable to use a liquid-impervious and moisture-permeable material that has been preferred in recent years from the viewpoint of preventing stuffiness. As a plastic film having moisture permeability, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching in a uniaxial or biaxial direction. Is widely used. In addition, non-woven fabric using micro-denier fibers, leakproof reinforcement by reducing the voids of the fibers by applying heat or pressure, and methods such as applying a superabsorbent resin or hydrophobic resin or water repellent Accordingly, a sheet that is liquid-impermeable without using a plastic film can also be used as the liquid-impermeable back sheet 11.

  The liquid-impermeable back sheet 11 is preferably extended to both sides of the side surface 30 of the absorbent element 50 by wrapping around both sides of the absorbent element 50 in order to improve leakage resistance. The width of this extended portion is suitably about 5 to 20 mm on each of the left and right sides.

  Moreover, the excretion indicator from which a color changes by absorption of a liquid part can be provided in the inner side of the liquid-impermeable back sheet 11, especially the absorber 56 side surface.

(Barrier cuffs)
The barrier cuff 60 is a belt-like member that extends over the entire front and rear direction along both side portions of the interior body 200, blocks urine and soft stool that move laterally along the top sheet 30, and prevents side leakage. It is provided for this purpose. The barrier cuff 60 of the present embodiment is provided so as to stand up from the side portion of the interior body 200, the base side portion stands up obliquely toward the center in the width direction, and the tip side portion from the intermediate portion has a width. It stands up diagonally outward in the direction.

  More specifically, the barrier cuff 60 is formed by folding a belt-like barrier sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 and folding it in the width direction. In addition, a plurality of elongated elastic elastic members 63 are fixed along the longitudinal direction at intervals in the width direction. An end of the barrier cuff 60 opposite to the folded portion in the width direction is an attachment portion 65 fixed to the back surface of the side edge of the interior body 200, and portions other than the attachment portion 65 protrude from the attachment portion 65. It is set as the protrusion part 66 (part by the side of a folding | turning part). Further, both end portions in the front-rear direction of the protruding portion 66 extend from the mounting portion 65 to the side surface of the topsheet 30 through the side portion of the interior body 200 and are hot-melted to the side surface of the topsheet 30. The base side portion is fixed to the front and rear fixing portion 67 by an adhesive or heat seal, and the tip side portion is folded back outward in the width direction from the tip of the base side portion and fixed to the base side portion. An intermediate part in the front-rear direction of the protruding part is an unfixed free part (inner free part), and an elongated elastic member 63 extending in the front-rear direction is fixed to the free part in an extended state.

The barrier sheet 62 is made of a spunbonded nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), a melt-blown nonwoven fabric having excellent uniformity and concealment, and water repellent with silicon as necessary. A treated product can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m ² . As the elongated elastic elastic member 63, rubber thread or the like can be used. When spandex thread rubber is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate at the time of fixation is preferably 150 to 350%, more preferably 200 to 300%. The term “elongation rate” means a value when the natural length is 100%. Further, as shown in the figure, a waterproof film 64 can be interposed between the barrier sheets folded in two.

  The number of the elongated elastic stretch members 63 provided in the free part of the barrier cuff 60 is preferably 2-6, and more preferably 3-5. The arrangement interval 60d is suitably 3 to 10 mm. If comprised in this way, in the range which has arrange | positioned the elongate elastic expansion-contraction member 63, it will become easy to contact | abut with respect to skin. The elongated elastic elastic member 63 may be disposed not only at the distal end side but also at the base side.

  The fixing target of the attachment portion 65 of the barrier cuff 60 can be an appropriate member such as the top sheet 30, the liquid-impermeable back sheet 11, the absorbent element 50 in the interior body 200.

  In the barrier cuff 60 thus configured, the contraction force of the elongated elastic elastic member 63 acts to bring the both ends in the front-rear direction close to each other, but the both ends of the projecting portion 66 are fixed so that they do not stand up. On the other hand, since they are non-fixed free portions, only the free portions stand up against the body side as shown in FIG. In particular, when the attachment portion 65 is located on the back surface side of the interior body 200, the barrier cuff 60 stands up so that the barrier cuff 60 opens outward in the width direction at and around the crotch portion. It comes in contact, and the fit is improved.

  The dimensions of the barrier cuff 60 can be appropriately determined. In the case of an infant paper diaper, for example, as shown in FIG. 7, the standing height of the barrier cuff 60 (the length in the width direction of the protruding portion 66 in the unfolded state) W6 is It is preferably 15 to 60 mm, particularly 20 to 40 mm. In addition, when the barrier cuff 60 is flatly folded so that the barrier cuff 60 is parallel to the surface of the top sheet 30, the distance W3 between the innermost folds is preferably 60 to 190 mm, particularly preferably 70 to 140 mm.

  Unlike the illustrated embodiment, double (two rows) of barrier cuffs can be provided on the left and right sides of the interior body 200.

(Absorption element)
The absorbent element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps the entire absorbent body 56. The packaging sheet 58 can be omitted.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber basis weight can be set to, for example, about 100 to 300 g / m ² when cotton-like pulp or short fibers are stacked, and in the case of a filament aggregate, for example, about 30 to 120 g / m ^2. Can do. The fineness in the case of a synthetic fiber is 1-16 dtex, for example, Preferably it is 1-10 dtex, More preferably, it is 1-5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used. It is preferable to disperse and hold superabsorbent polymer particles in the absorber 56.

  Although the absorbent body 56 may be rectangular, as shown in FIG. 6, as shown in FIG. 6, the hourglass has a front end portion, a rear end portion, and a narrow portion narrower than the front end portion and the rear end portion. The shape is preferable because the fit of the absorbent body 56 and the barrier cuff 60 around the legs is improved.

  Moreover, although the dimension of an absorber can be determined suitably, it is preferable to extend to the peripheral part of the interior body, or its vicinity in the front-back direction and the width direction. Reference numeral 56X indicates the width of the absorber 56.

(Superabsorbent polymer particles)
The absorber 56 can contain superabsorbent polymer particles in a part or all thereof. Superabsorbent polymer particles include “powder” in addition to “particles”. As the particle diameter of the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are, and those having a particle size of 1000 μm or less, particularly 150 to 400 μm are desirable. The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the sticky feeling after liquid absorption can be suppressed effectively.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the amount of polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. When it exceeds 350 g / m ² , the effect is saturated.

  If necessary, the superabsorbent polymer particles can adjust the spraying density or spraying amount in the plane direction of the absorber 56. For example, it is possible to increase the application amount of the liquid excretion site as compared to other sites. When gender differences are taken into account, men can increase the front spray density (amount), while women can increase the center spray density (amount). In addition, a portion where no polymer exists locally (for example, in a spot shape) in the planar direction of the absorber 56 can also be provided.

(Packaging sheet)
When the packaging sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and the material can be polypropylene, polyethylene / polypropylene composite material, or the like. The basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  The packaging form of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of the superabsorbent polymer particles from the front and rear end edges, the cylinder is formed so as to surround the front and back surfaces and both side surfaces of the absorbent body 56. It is preferable that the front and rear edges of the absorbent body 56 are protruded from the front and back of the absorbent body 56, and the protruding portions are crushed in the front and back directions and joined by a joining means such as a hot melt adhesive.

(Exterior sheet)
The exterior sheet 12 has a part constituting the front body F extending from the crotch part to the ventral side and a part constituting the rear body B extending from the crotch part to the back side, and both sides of the front body F As shown in FIG. 8, a waist opening WO for passing the wearer's torso and a pair of left and right leg openings LO for passing the legs are formed. It is what. Reference numeral 12A denotes a joining portion (hereinafter, this portion is also referred to as a side seal portion). The crotch portion means the center in the front-rear direction from the waist edge of the front body F to the waist edge of the back body B in the unfolded state, and the front part and the back part thereof are the front body F and Each back body B is meant.

  The exterior sheet 12 includes a waistline portion T defined as a front-rear direction range extending from the waist opening WO to the upper end of the leg opening LO, and a front-rear direction range of the portion forming the leg opening LO (the side seal portion 12A of the front body F). And an intermediate portion L defined as a front-rear direction region having a side seal portion 12A of the back body B. The waistline T can be divided into a “waist edge” W that conceptually forms the edge of the waist opening, and a “waist lower part” U that is a lower part than this. These lengths in the vertical direction vary depending on the size of the product and can be determined as appropriate. For example, the waist edge W may be 15 to 40 mm, and the waist lower portion U may be 65 to 120 mm. On the other hand, both side edges of the intermediate portion L are bundled along the circumference of the wearer's leg, and this is a portion into which the wearer's leg is put. As a result, the exterior sheet 12 has a substantially hourglass shape as a whole. The degree of tightness of the exterior sheet 12 can be determined as appropriate, and, as shown in FIGS. 1 to 8, the narrowest part may be narrower than the width of the interior body 200 in order to obtain a clean appearance. Although it is preferable, the narrowest part may be determined so as to be equal to or larger than the width of the interior body 200.

  As shown in FIGS. 3 to 5, the exterior sheet 12 is formed by bonding two sheet base materials 12 </ b> S and 12 </ b> H with an adhesive such as a hot melt adhesive, and is located on the inner side. Although the base material 12H extends only to the edge of the waist opening WO, the outer sheet base material 12S wraps around the waist side edge of the inner sheet base material 12H and is folded back to the inside. 12r is extended so that it may coat | cover up to the waist side edge part of the interior body 200. FIG.

The sheet base materials 12S and 12H can be used without particular limitation as long as they are in sheet form, but are preferably non-woven fabrics. The nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When using a nonwoven fabric, it is preferable that the basic weight shall be about 10-30 g / m < ² >.

Moreover, it is preferable that the total basis weight of the exterior sheet 12 is about 20 to 60 g / m ² so that the design of the printing sheet 25 to be described later can be satisfactorily viewed from the outer surface of the product through the exterior sheet 12. The total light transmittance specified in 7105 is preferably 40% or more, particularly 50% or more.

  The exterior sheet 12 is provided with elongate elastic members 15 to 19 such as thread rubber at a predetermined elongation rate between the sheet bases 12S and 12H in order to improve the fit to the waistline. As the elongated elastic elastic members 15 to 19, synthetic rubber or natural rubber may be used. For bonding the sheet bases 12S and 12H of the exterior sheet 12 and fixing the elongated elastic members 15 to 19 sandwiched therebetween, hot melt bonding or heat sealing or ultrasonic bonding by various coating methods is used. Can do. If the entire exterior sheet 12 is firmly fixed, the texture of the sheet is impaired, which is not preferable. By combining these, it is preferable that the elongated elastic elastic members 15 to 19 are firmly bonded, and other portions are not bonded or bonded weakly.

More specifically, the entire width direction is continuous between the inner surface of the inner sheet base 12H and the outer surface of the folded portion 12r of the outer sheet base 12S at the waist edge W of the rear body B and the front body F. As described above, the plurality of waist edge elastic elastic members 17 are fixed in a state of being spaced apart in the vertical direction and extended along the width direction at a predetermined extension rate. In addition, one or more of the waist edge elastic elastic members 17 disposed in a region adjacent to the waist lower portion U may overlap with the interior body 200 or may be overlapped with the interior body 200 in the width direction. You may each provide in the width direction both sides except a center part. The waist edge elastic elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to the rubber thread of 1.0mm about ^2), 3 to 22 present approximately at intervals of 4 to 12 mm, respectively elongation from 150% to 400%, preferably fixed in particular about 220-320%. Further, the waist edge elastic elastic members 17 need not all have the same thickness and elongation rate. For example, the elastic elastic members may have different thicknesses and elongation rates at the upper and lower portions of the waist edge W. .

  Further, between the outer side surface of the inner sheet base 12H and the inner side surface of the outer sheet base 12S in the lower waist U of the front body F and the rear body B, except for the widthwise central portion overlapping the interior body 200, A plurality of waist lower elastic elastic members 15, 19 made of an elongated elastic elastic member are continuously provided over the entire width direction on each of the upper side and both sides in the width direction, with a predetermined interval in the vertical direction It is fixed in an expanded state along the width direction at an expansion rate.

The waist lower elastic elastic members 15 and 19 have a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to It is preferable to fix the thread rubber of about 1.0 mm ² ) at an interval of 1 to 15 mm, particularly 3 to 8 mm, and about 5 to 30 at an elongation of 200 to 350%, particularly about 240 to 300%.

  Moreover, between the outer side surface of the inner sheet base material 12H and the inner side surface of the outer sheet base material 12S in the intermediate part L of the front body F and the back body B, except for the center part in the width direction overlapping the interior body 200, A plurality of intermediate elastic expansion / contraction members 16 made of an elongated elastic expansion / contraction member are provided in each part on both sides in the width direction so as to be continuous over the entire width direction. It is fixed in a stretched state along the direction.

The intermediate elastic elastic members 16 and 18 have a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to It is preferable to fix the thread rubber of about 1.0 mm ² ) at an interval of 5 to 40 mm, particularly 5 to 20 mm, and about 2 to 10 at an elongation of 150 to 300%, particularly 180 to 260%.

  As shown in the figure, when the waist lower elastic elastic member and the intermediate elastic elastic members 15, 19, 16, 18 are respectively provided on both sides in the width direction except for the central portion in the width direction overlapping the interior body 200. The interior body 200 does not shrink more than necessary in the width direction, so that it does not look bad or absorbs. In this form, in addition to the form in which the elastic stretchable member exists only on both sides in the width direction, the elastic stretchable member exists from one side of the width direction to the other side across the interior body 200, but overlaps the interior body 200. At the center in the width direction, the elastic expansion / contraction member is finely cut, and the contraction force does not act (substantially equivalent to not providing the elastic expansion / contraction member), and only the both sides in the width direction are configured as the contraction force acting portions. Are also included. Of course, the arrangement of the waist lower elastic members 15, 19, 16, and 18 is not limited to the above example, and the waist lower portion so that the elastic force acts on the entire width of the waist lower U. A part or all of the elastic elastic member and the intermediate elastic elastic members 15, 19, 16, 18 can be provided across the interior body 200 from one side in the width direction to the other side.

  In addition, when the elongated elastic elastic members 15 to 19 of each part cross a printing sheet 25 described later, when rubber containing titanium oxide is used as the elongated elastic elastic members 15 to 19, the content of titanium oxide is It is preferable to use a low one (for example, 2% or less) or one containing no titanium oxide.

(Post-processing tape)
A post-processing tape 70 (fixing means) can be provided at the center in the width direction on the outer surface of the rear body B of the exterior sheet 12. The post-processing tape 70 is for fixing the diaper 100 in a state where the diaper 100 is rolled or folded so that the topsheet 30 is on the inside and the front body F is on the inside. As shown in FIG. 5, in the general post-processing tape 70, a base end portion 71 is fixed to the outer surface of the exterior sheet 12 with an adhesive or the like, and a portion on the front end side of the base end portion 71 is folded in three. (Folded in a Z-shaped cross section) or folded in half, and the portion between the folded portions is fixed (temporarily fixed) by the temporary fixing adhesive 72 so as to be peelable. Moreover, while having the knob | pick part 73 colored in opaque colors, such as white, in the front-end | tip part, the part except this knob | pick part 73 is transparent or semi-transparent, Through the transparent or semi-transparent part in this post-processing tape 70, A design to be described later is visible from the outer surface side of the post-processing tape 70. Although a specific structure can be appropriately configured, in the illustrated embodiment, the whole is formed by connecting a plurality of transparent or semi-transparent substrates in the longitudinal direction, and a colored tape 74 is bonded to the knob 73. Is adopted.

  At the time of disposal, the diaper 100 is rolled or folded so that the topsheet 30 is on the inside and the front body F is on the inside, and then the folded portion of the post-processing tape 70 is peeled off and spread, and the diaper 100 is rolled or folded. The diaper 100 is fixed with an adhesive so as to be wound from the rear body B of the diaper 100 to the outer surface on the opposite side over the waist opening WO. The post-processing tape 70 is particularly preferably a tri-fold shape that can be folded compactly when not in use and can be expanded into a long shape when in use.

  Fixing means such as the post-processing tape 70 may be provided on the front body F or on both the back body B and the front body F.

(Print sheet)
Between the liquid-impermeable back sheet 11 and the exterior sheet 12 (including the interlayer of the exterior sheet 12), a print sheet 25 that is designed by printing is provided. The exterior sheet 12 may be omitted, and the print sheet 25 may be exposed on the outer surface. The printed sheet 25 in the illustrated example has a smaller area than the body on which the printed sheet 25 is disposed, and is provided separately for the front body F and the back body B, but passes through the crotch from the front body F. It can also be provided so as to continue to the back body B integrally.

  Although the size and shape of the printing sheet 25 are not particularly limited, it is preferable to sufficiently increase the area in order to make the function sufficient. For example, the width of the printing sheet 25 is 50 to 120 of the width of the absorber 56. The length of the printing sheet 25 is preferably about 15 to 30% of the total length Y of the article on at least one side of the stomach side and the back side. Further, the shape of the print sheet 25 is preferably a rectangle as shown in the figure in that trim loss does not occur. However, the print sheet 25 has a geometric shape such as a circle, an ellipse, a triangle, a hexagon, or a shape along the periphery of the design. You may cut it.

As the sheet base material of the printing sheet 25, a plastic film, non-woven fabric, paper, or the like can be used, but a bulky material having high air permeability is preferable. When using a plastic film, it is desirable to have moisture permeability in order to prevent stuffiness. Nonwoven fabrics and paper are preferable because they have moisture permeability, and when performing design printing, it is preferable to use nonwoven fabrics that are smooth and easy to print, and papers that are high in strength and difficult to bleed ink. Particularly preferred are basis weight 15 to 35 g / m ² approximately, crepe paper having a thickness of about 0.1 to 0.3 mm (thin paper) and a basis weight 10 to 25 g / m ² approximately, a thickness of about 0.1 to 0.3 mm Non-woven fabrics (especially spunbond nonwoven fabrics and SMS nonwoven fabrics having a spunbond portion having a fineness of about 1.0 to 3.0 dtex). When crepe paper is used, the crepe rate is preferably about 5 to 20%, particularly about 5 to 15%. If the crepe rate is 20% or more, the amount of ink fixed increases, but blurring occurs and is not suitable for design printing. If the crepe rate is 5% or less, the amount of fixing is small because the ink hardly penetrates.

(Exterior sheet split structure)
In the above-described example, the front body F to the back body B are continuously covered with the integral exterior sheet 12, but the exterior sheet covers the stomach side of the wearer's waist and the back side The front end portion of the interior body is connected to the inner surface of the center portion in the width direction of the abdominal side exterior sheet with a hot melt adhesive or the like, and the center portion in the width direction of the back side exterior sheet. The rear end of the interior body is connected to the inner surface by a hot melt adhesive or the like, and the form in which the abdominal exterior sheet and the back exterior sheet are not continuous on the crotch side and are separated from each other may be adopted. it can. This separation distance can be about 150 to 250 mm. In this case, on the back surface of the liquid-impermeable back sheet in the interior body, so as to cover the entire back surface of the interior body, or so as to cover the entire portion exposed between the abdominal exterior sheet and the back exterior sheet, The crotch outer sheet can also be fixed. As the crotch outer sheet, the same material as that used for the outer sheet described above can be used. The crotch outer sheet also corresponds to the outer sheet of the present invention.

(About features)
In the pants-type disposable diaper as described above, the structure of the stretchable part for fitting of the present invention can be applied to the lower waist part U and the intermediate part L. That is, the portion includes an inner sheet base 12H having a surface that comes into contact with the wearer's skin, and an outer sheet base that is bonded to a surface opposite to the face in contact with the wearer's skin in the inner sheet base 12H. It has a material 12S (second sheet base material), waist lower elastic elastic members 15 and 19 and intermediate elastic elastic members 16 and 18 provided between these sheet base materials, and the inner sheet base material 12H is the main sheet base material 12H. The outer sheet base material corresponds to the first sheet base material of the invention, the outer sheet base material corresponds to the second sheet base material of the present invention, and the lower waist elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 are the first in the present invention. It corresponds to an elongated elastic elastic member sandwiched between the one sheet base material and the second sheet base material. The first sheet base material and the second sheet base material are each composed of a single base material, and either one or both are laminates formed by laminating a plurality of base materials such as nonwoven fabrics. Also good.

  Hereinafter, application examples illustrated in FIGS. 6 and 10 to 12 will be described in order. FIG. 6 is an enlarged view of a state in which the waist lower portion U and the intermediate portion L of the first embodiment are expanded, and the inner sheet base 12H has a width direction (waist lower elastic elastic members 15, 19 and intermediate portions). The top portion 12t and the bottom portion 12b extending in the direction parallel to the partial elastic members 16 and 18 are spaced apart in the vertical direction (the direction perpendicular to the waist lower elastic members 15 and 19 and the intermediate elastic members 16 and 18). The outer sheet | seat base material 12S is made into the wavy shape which is located alternately and is flat. The lower waist elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 bulge toward the outer sheet base 12S side of the top 12t and the bottom 12b of the inner sheet base 12H (in the illustrated example, the bottoms). 12b) and a portion that bulges to the outer sheet base 12S side of the top 12t and the bottom 12b of the inner sheet base 12H (the bottom 12b in the illustrated example) in a state of being extended along the longitudinal direction. The outer sheet base 12S is sandwiched and fixed.

  Further, of the top portion 12t and the bottom portion 12b of the inner sheet base material 12H, the one that bulges to the outer sheet base material 12S side (the bottom portion 12b in the illustrated example) is fixed to the facing portion of the outer sheet base material 12S, and this fixing is performed. Between the parts, the inner sheet base 12H is not fixed to the outer sheet base 12S, but can be swelled away from the outer sheet base 12S. In this case, the inner sheet base material 12H and the outer sheet base material 12S can be joined to each other at the sandwiched portions of the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 (of course, separately). May be fixed).

  The fixing means for the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 can be determined as appropriate, but is preferably fixed by a hot melt adhesive 12m. The hot melt adhesive 12m is applied to the outer peripheral surface of the elongated elastic stretch member and sandwiched between the inner sheet base 12H and the outer sheet base 12S and adhered to the inner sheet base 12H and the outer sheet base 12S. Instead of or together with this, a hot melt adhesive is curtain-coated on one of the bonding surfaces of the inner sheet base 12H and the outer sheet base 12S, and the elongated elastic elastic member is formed by both the sheet bases 12H and 12S. A method of sandwiching and fixing can be employed. Further, the bonding of the inner sheet base 12H and the outer sheet base 12S can be performed by using a hot melt adhesive 12m for fixing the elongated elastic elastic member or by a known method separately. it can.

  On the other hand, as can be seen from such a structure, the interval WL (wavelength; the interval of the top 12t is the same) of the wave bottom 12b of the inner sheet base 12H is the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members. 16 and 18 are determined in correspondence with each other. Further, the wave swell height AM (amplitude) of the inner sheet base 12H can be determined as appropriate, but is preferably about 0.5 to 5 times, particularly about 1 to 2 times the interval WL.

  As a method of forming the inner sheet substrate 12H in a wave shape, as shown in FIG. 9, the object sheet 12H is sandwiched between a pair of wave rolls 100 and 101 having waved outer peripheral surfaces that are engaged with each other, and this is necessary. The wave roll processing which heats according to this and forms the object sheet | seat 12H in a wave shape is preferable.

  In the stretchable part having such a structure, the inner sheet base material 12H constituting the surface that comes into contact with the skin of the wearer is between the waist lower elastic stretchable members 15 and 19 and the intermediate elastic stretchable members 16 and 18. The portion that is positioned becomes surplus with respect to the outer sheet base material 12S, and this surplus portion (portion between the bottom portions 12t) gradually increases in the direction perpendicular to the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18. It is formed to make. And this surplus part contracts with contraction of waist lower elastic elastic members 15 and 19 and middle elastic elastic members 16 and 18, and waist lower elastic elastic member 15 by inner sheet base material 12H and outer sheet base material 12S. , 19 and the intermediate elastic elastic members 16, 18 are contracted by the contraction force of the lower waist elastic elastic members 15, 19 and the intermediate elastic elastic members 16, 18 to increase rigidity, thereby increasing the inner sheet base material. The excess portion of 12H bulges greatly toward the skin side with the sandwiched portions of the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 as a support. On the other hand, on the outer sheet base 12 </ b> S, only shrinkage wrinkles accompanying shrinkage of the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 are formed. As a result, the waist elastic elastic members 15 and 19 and the middle elastic elastic members on the skin side of the wearer with respect to the waist elastic elastic members 15 and 19 and the middle elastic elastic members 16 and 18 are fitted. A bulging portion larger than the shrinkage folds formed by 16 and 18 is formed, and only the shrinkage folds formed by the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 enter the opposite side.

  Therefore, as with the prior art, it is excellent in breathability and cushioning properties, and the contact of the lower elastic elastic members 15 and 19 and the elastic elastic members 16 and 18 with the skin is alleviated, but the thickness is advanced. Unlike technology, there is little increase. For this reason, even when an outer such as clothing is used in combination with a disposable diaper or a sanitary napkin, the outer is hardly worn. Furthermore, there is also an advantage that it can be manufactured using conventional general-purpose equipment, except that the inner sheet base 12H is corrugated.

  Next, FIG. 10 is an enlarged view showing a state in which the waist lower portion U and the intermediate portion L of the second embodiment are expanded, and the inner sheet base material 12H and the outer sheet base material 12S are formed as an integral laminate. In this integrated laminate, the top 12t and the bottom 12b extending in the width direction are formed in a wave shape alternately spaced apart in the vertical direction, and the waist lower elastic elastic members 15, 19 and the intermediate portion are formed. The elastic elastic members 16 and 18 are disposed along the side of the top portion 12t and the bottom portion 12b that is opposite to the skin side of the wearer and are extended in the longitudinal direction. It is sandwiched and fixed between the base materials 12S. In the second embodiment, the inner sheet base material 12H and the outer sheet base material 12S can be bonded to each other at an appropriate site, but the waist lower elastic elastic members 15 and 19 and the intermediate portion are not damaged so as not to impair flexibility. It is desirable that the inner sheet base material 12H and the outer sheet base material 12S are joined at the sandwiched portions of the elastic elastic members 16 and 18 and not joined at other portions.

  Wave dimension and corrugation processing method in laminated body of inner sheet base material 12H and outer sheet base material 12S, fixing means for lower waist elastic elastic members 15, 19 and intermediate elastic elastic members 16, 18, inner sheet base material The bonding means for 12H and the outer sheet base 12S are the same as in the case of the inner sheet base 12H in the first embodiment.

  In the expansion / contraction part having such a structure, the inner sheet base material 12H and the outer sheet base material 12S are integrally formed in a wave-like portion at the top portion 12t and the bottom portion 12b with the waist away from the wearer's skin. The lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 are positioned, and the lower skin elastic elastic members 15 and 19 and the intermediate part are the surplus parts (parts between the bottom parts 12b). It is formed so as to be stepped in a direction orthogonal to the elastic elastic members 16 and 18. And this surplus part contracts with contraction of waist lower elastic elastic members 15 and 19 and middle elastic elastic members 16 and 18, and waist lower elastic elastic member 15 by inner sheet base material 12H and outer sheet base material 12S. , 19 and the intermediate elastic elastic members 16, 18 are contracted by the contraction force of the lower waist elastic elastic members 15, 19 and the intermediate elastic elastic members 16, 18 to increase the rigidity, so that the surplus portion becomes the waist. The lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 bulge toward the skin side as a support. As a result, the waist elastic elastic members 15 and 19 and the middle elastic elastic members on the skin side of the wearer with respect to the waist elastic elastic members 15 and 19 and the middle elastic elastic members 16 and 18 are fitted. A bulging portion larger than the shrinkage folds formed by 16 and 18 is formed, and only the shrinkage folds formed by the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 enter the opposite side. Therefore, the same advantage as the first embodiment is brought about. In the second embodiment, the inner sheet base 12H and the outer sheet base 12S are bonded and integrated, and the waist lower elastic members 15 and 19 and the intermediate elastic members 16 and 18 are sandwiched therebetween. Since it can be processed into a wave after being fixed, there is also an advantage that positioning of the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 with respect to the waves becomes easy.

  Next, FIG. 11 is an enlarged view showing a state where the waist lower portion U and the intermediate portion L of the third embodiment are expanded. The inner sheet base material 12H has an opposite side to the outer sheet base material 12S side. Bulging portion rows 12w, 12w formed by juxtaposing the bulging portion 12w in an umbrella shape along the direction parallel to the lower waist elastic elastic members 15, 19 and the intermediate elastic elastic members 16, 18 Are formed at intervals in a direction orthogonal to the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18, and the outer sheet base 12S is flat. And the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 are arranged between the bulging part rows 12w, 12w... In the inner sheet base material 12H and extended in the longitudinal direction. In this state, the inner sheet base 12H is sandwiched and fixed between a portion between the bulging portion rows 12w, 12w... And the outer sheet base 12S. Moreover, the part between the bulging part row | line | columns 12w, 12w ... in the inner side sheet base material 12H is fixed to the opposing site | part in the outer side sheet base material 12S, and the bulging part 12w in the inner side sheet base material 12H is the outer side sheet base material 12S. The outer sheet base material 12S is not fixed to the outer sheet 12S but is bulged. In this case, the inner sheet base material 12H and the outer sheet base material 12S can be joined to each other at the sandwiched portions of the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 (of course, separately). May be fixed).

  The fixing means for the waist lower elastic elastic members 15, 19 and the intermediate elastic elastic members 16, 18, and the bonding means for the inner sheet base 12H and the outer sheet base 12S are the same as in the first embodiment.

  On the other hand, the longitudinal length YL of the bulging portion 12w of the inner sheet base material 12H is such that the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 are different from each other as can be seen from such a structure. The interval YD between the bulging portion rows 12w, 12w,... Is the width of the waist lower elastic members 15 and 19 and the intermediate elastic members 16 and 18 (length in the longitudinal direction. ) Or more. Further, the bulging height WH of the bulging portion 12w is about 1 to 5 times, particularly about 2 to 3 times the mutual interval between the waist lower elastic elastic members 15 and 19 or the intermediate elastic elastic members 16 and 18. Is desirable.

  As a method of forming the umbrella-shaped bulging portion 12w on the inner sheet base material 12H, a convex roll in which convex portions having a shape corresponding to the dent on the back surface of the umbrella-shaped bulging portion 12w are formed at a large number of intervals on the outer peripheral surface. And a concave roll in which each convex part of the convex roll enters a concave roll formed on the outer peripheral surface, pressurizing the inner sheet base material 12H, heating as necessary, and umbrella-shaped bulging The embossing which forms the part 12w can be used suitably. As the concave roll, a steel roll or a rubber roll having a net-like body stretched on the outer peripheral surface can be suitably used.

  In the stretchable part having such a structure, the sandwiched portions of the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 by the inner sheet base 12H and the outer sheet base 12S are the waist lower elastic elastic members 15, 19 and the intermediate elastic elastic members 16 and 18 are contracted by the contraction force to increase the rigidity, so that a large number of umbrella-shaped bulging portions 12w in the inner sheet base material 12H become the waist lower elastic elastic members 15 and 19 and the intermediate elastic members The elastic portions 16 and 18 of the partial elastic members bulge toward the skin side with support. On the other hand, on the outer sheet base 12 </ b> S, only shrinkage wrinkles accompanying shrinkage of the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 are formed. As a result, the waist elastic elastic members 15 and 19 and the middle elastic elastic members on the skin side of the wearer with respect to the waist elastic elastic members 15 and 19 and the middle elastic elastic members 16 and 18 are fitted. A larger wrinkle than the shrinkage wrinkle by 16 and 18 enters, and only the contracted wrinkle enters on the opposite side. Therefore, the same advantage as the first embodiment is brought about.

  Next, FIG. 12 is an enlarged view showing a state where the waist lower portion U and the intermediate portion L of the fourth embodiment are expanded, and the inner sheet base material 12H and the outer sheet base material 12S are formed as an integral laminate. The bulging portion 12w that bulges in the shape of an umbrella on the skin side of the wearer is parallel to the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 with respect to the integrated laminated body. A plurality of bulging portion rows 12w, 12w,... Formed side by side along the direction are formed at intervals in a direction orthogonal to the waist lower elastic elastic members 15, 19 and the intermediate elastic elastic members 16, 18. ing. In addition, the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 are disposed between the bulging part rows 12w, 12w, and are extended in the longitudinal direction in the inner sheet base material. 12H and the outer sheet base 12S are sandwiched and fixed. In the fourth embodiment, the inner sheet base material 12H and the outer sheet base material 12S can be bonded to each other at an appropriate site, but the waist lower elastic elastic members 15 and 19 and the intermediate portion so as not to impair flexibility. It is desirable that the inner sheet base material 12H and the outer sheet base material 12S are joined at the sandwiched portions of the elastic elastic members 16 and 18 and not joined at other portions.

  The dimensions of the bulging portion 12w in the laminate of the inner sheet base material 12H and the outer sheet base material 12S, the processing method into the corrugated shape, and the like are the same as in the case of the inner sheet base material 12H in the third embodiment, and the waist lower elasticity The fixing means for the elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18, and the bonding means for the inner sheet base 12H and the outer sheet base 12S are the same as in the first embodiment.

  In the stretchable part having such a structure, the sandwiched portions of the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 by the inner sheet base 12H and the outer sheet base 12S are the waist lower elastic elastic members 15, 19 and the intermediate elastic elastic members 16 and 18 are contracted by the contraction force to increase the rigidity, whereby the umbrella-like bulging portion 12w formed integrally with the inner sheet base 12H and the outer sheet base 12S is formed. The waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 support the sandwiched portions so as to bulge toward the skin side. As a result, the waist elastic elastic members 15 and 19 and the middle elastic elastic members on the skin side of the wearer with respect to the waist elastic elastic members 15 and 19 and the middle elastic elastic members 16 and 18 are fitted. The bulging part 12w larger than the shrinkage wrinkles by 16 and 18 is formed, and only the shrinkage wrinkles by the waist lower elastic elastic members 15 and 19 and the intermediate elastic elastic members 16 and 18 enter on the opposite side.

  Therefore, the same advantage as the first embodiment is brought about. In the fourth embodiment, the inner sheet base 12H and the outer sheet base 12S are bonded and integrated, and the waist lower elastic members 15 and 19 and the intermediate elastic members 16 and 18 are sandwiched therebetween. Since the umbrella-shaped bulging portion 12w can be integrally formed after being fixed, it is easy to position the waist lower elastic elastic members 15, 19 and the intermediate elastic elastic members 16, 18 with respect to the bulging portion rows 12w, 12w. There are also advantages.

(Other)
The above example is an example of application to the part from the waist lower part U to the middle part L of the pants-type disposable diaper, but it may be applied including the waist edge W, and the elastic elastic member 16 of the middle part L , 18 may be omitted. Moreover, the structure of the above-mentioned expansion-contraction part for a fit is applicable also to other expansion-contraction parts, such as the waist part of the back side part of a tape-type disposable diaper described in the term of the prior art, and a three-dimensional gather.

(Experimental example)
13 and 14 show a sample of the fourth embodiment of the stretchable part, and FIG. 15 shows a sample of the third embodiment. The reference numerals in the figure are the same as those in FIGS. FIG. 13 is a skin contact surface, FIG. 14 and FIG. 15 are the opposite surfaces, (a) of each figure is a natural length state, (c) of each figure is a fully extended state (the same state as the state of FIG. 11), (B) of each figure is the intermediate | middle expansion | extension state between a natural length state and a complete expansion state.

As the inner sheet base 12H and the outer sheet base 12S of each sample, PP fiber spunbond nonwoven fabric (weight per unit area: 18 g / m ² ) is used, and the elastic elastic member 15 is a synthetic thread rubber having a thickness of 470 dtex. used. In addition, the inner sheet substrate 12H and the outer sheet substrate 12S are bonded together and the elastic elastic member 15 is fixed by extending the elastic elastic member 15 having a hot melt adhesive applied to the outer peripheral surface at a rate of 0.039 g / m. The sheet is sandwiched between the inner sheet base 12H and the outer sheet base 12S while being stretched at a rate of 200%, and a separate hot melt adhesive is applied to the opposing surfaces of the inner sheet base 12H and the outer sheet base 12S. There wasn't. Further, the interval between the elastic elastic members 15 was 10 mm, the bulging height WH of the bulging portion 12 w was 5 mm, and the longitudinal length YL of the bulging portion 12 w was 10 mm.

  As a result, on the skin contact surface, as shown in FIGS. 13A and 13B, the umbrella-shaped bulging portion 12 w bulges greatly toward the skin side with the sandwiched portion of the elastic elastic member 15 as a support. This point was the same for the sample of the third embodiment (not shown). On the other hand, on the surface opposite to the skin contact surface, as shown in FIGS. 14 (a) and 14 (b) and FIGS. 15 (a) and 15 (b), shrinkage wrinkles due to the elastic elastic member 15 enter. There was no bulging beyond the heel.

  The present invention can be used for absorbent articles.

  DESCRIPTION OF SYMBOLS 11 ... Liquid impervious back sheet, 12 ... Exterior sheet, 12H ... Inner sheet base material (12H), 12S ... Outer sheet base material, 12t ... Top part, 12b ... Bottom part, 12m ... Hot melt adhesive, 12w ... Swelling Part, 12r ... folded portion, 25 ... printed sheet, 200 ... interior body, 30 ... top sheet, 40 ... intermediate sheet, 50 ... absorbent element, 56 ... absorbent, 58 ... packaging sheet, 60 ... side barrier cuff, 62 ... barrier sheet.

Claims (5)

A first sheet base material having a surface in contact with the skin of the wearer; a second sheet base material bonded to a surface opposite to the surface in contact with the wearer's skin in the first sheet base material; and these sheets In an absorbent article comprising a stretchable part for fitting having an elongated elastic stretchable member provided between substrates,
The first sheet base material has a top portion and a bottom portion extending in a direction parallel to the elongated elastic elastic member in a direction perpendicular to the elongated elastic elastic member in a state where at least the fitting elastic portion is expanded. It is formed in a wavy shape that is positioned alternately with a gap between
The second sheet base material is configured to be flat in a state in which at least the fitting stretchable part is developed,
Of the top portion and the bottom portion of the first sheet base material, the one that bulges toward the second sheet base material is fixed to the opposite portion of the second sheet base material, and the first sheet base is between the fixed portions. The material is not fixed to the second sheet base material and can be swelled away from the second sheet base material,
The elongated elastic elastic member is arranged along the direction of bulging to the second sheet substrate side among the top and bottom portions of the first sheet substrate, and is elongated in the longitudinal direction. Of the top and bottom of one sheet base material, it is sandwiched and fixed between the second sheet base material and the one that bulges to the second sheet base material side.
An absorbent article characterized by the above. A first sheet base material having a surface in contact with the skin of the wearer; a second sheet base material bonded to a surface opposite to the surface in contact with the wearer's skin in the first sheet base material; and these sheets In an absorbent article comprising a stretchable part for fitting having an elongated elastic stretchable member provided between substrates,
The first sheet base material and the second sheet base material form an integral laminated body, and the integral laminated body has a top portion and a bottom portion extending in a direction parallel to the elongated elastic elastic member. It is formed in a wavy shape that is alternately positioned with an interval in a direction orthogonal to the elastic elastic member,
The elongated elastic elastic member is disposed along the side of the top and bottom located on the opposite side of the skin side of the wearer, and is elongated in the longitudinal direction, and the first sheet base and the second It is clamped and fixed between sheet base materials,
An absorbent article characterized by the above. A first sheet base material having a surface in contact with the skin of the wearer; a second sheet base material bonded to a surface opposite to the surface in contact with the wearer's skin in the first sheet base material; and these sheets In an absorbent article comprising a stretchable part for fitting having an elongated elastic stretchable member provided between substrates,
In the first sheet base material, a bulging portion that bulges toward the opposite side to the second sheet base material side from the peripheral edge toward the central portion is provided in parallel along the direction parallel to the elongated elastic elastic member. A plurality of bulged portion rows formed in a manner spaced at intervals in a direction orthogonal to the elongated elastic elastic member,
The second sheet base material is configured to be flat in a state in which at least the fitting stretchable part is developed,
A portion between the bulging portion rows in the first sheet base material is fixed to a facing portion in the second sheet base material, and a bulging portion in the first sheet base material is not fixed to the second sheet base material. Swelled away from the second sheet base material,
The elongated elastic elastic member is disposed between the bulging portion rows in the first sheet base material and is extended in the longitudinal direction between the bulging portion rows in the first sheet base material. Between the portion and the second sheet base material,
An absorbent article characterized by the above. A first sheet base material having a surface in contact with the skin of the wearer; a second sheet base material bonded to a surface opposite to the surface in contact with the wearer's skin in the first sheet base material; and these sheets In an absorbent article comprising a stretchable part for fitting having an elongated elastic stretchable member provided between substrates,
The first sheet base material and the second sheet base material form an integral laminate, and with respect to the integral laminate, at least the fitting stretchable part is fully extended in the stretch direction from the periphery. A bulging portion row formed by juxtaposing a bulging portion that bulges toward the wearer's skin side toward the center portion along a direction parallel to the elongated elastic elastic member is the elongated elastic elastic member. Are formed at intervals in a direction orthogonal to
The elongated elastic elastic member is disposed between the bulging portion rows and is clamped and fixed between the first sheet base material and the second sheet base material in a state of being elongated in the longitudinal direction.
An absorbent article characterized by the above. An exterior sheet constituting the front body and the back body, and an interior body including an absorbent body fixed to the inner surface of the exterior sheet, including both sides of the exterior sheet in the front body and both sides of the exterior sheet in the back body Are joined together, the waistline portion is formed in an annular shape, and a waist opening and a pair of left and right leg openings are formed, a pants-type disposable diaper,
In the region including at least both sides in the width direction of the interior body in the exterior sheet, the stretchable part for fitting is provided so that the elongated elastic stretchable member is in the width direction.
The absorbent article of any one of Claims 1-4.